CN105490262A - System and method for load monitoring of smart home - Google Patents
System and method for load monitoring of smart home Download PDFInfo
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- CN105490262A CN105490262A CN201610029474.8A CN201610029474A CN105490262A CN 105490262 A CN105490262 A CN 105490262A CN 201610029474 A CN201610029474 A CN 201610029474A CN 105490262 A CN105490262 A CN 105490262A
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- 238000000034 method Methods 0.000 title claims abstract description 15
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/005—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too low isolation resistance, too high load, short-circuit; earth fault
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/006—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
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Abstract
The invention discloses a system and a method for load monitoring of a smart home, wherein the system comprises the components of one or a plurality of load circuits which are connected between a zero line and a live line, wherein each load circuit comprises a switch device and a load; a sampling circuit which is leaded out from a portion between the switch device and the load in the load circuit and is composed of sampling resistors; a zero-crossing waveform detecting circuit which is used for sampling from the zero line and the live line for obtaining a zero-crossing waveform; a comparison circuit which is used for comparing a voltage waveform obtained through sampling by the sampling circuit with the zero-crossing waveform and generating a comparison signal; and a control circuit which is used for generating a control signal according to the comparison signal and controlling the switch device according to the control signal for switching on or switching off the load.
Description
Technical field
The disclosure relates to Smart Home field, particularly a kind of system and method for the load monitoring for Smart Home.
Background technology
Smart Home is the embodiment of thing connectionization under the influence of internet.Various equipment (as audio & video equipment, illuminator, curtain control, airconditioning control, safety-protection system, Digital Theater System, video server, shadow cabinet system, network home appliance etc.) in family are connected together by technology of Internet of things by Smart Home, provide several functions and the means such as home wiring control, Lighting control, remote control using telephone, indoor and outdoor remote control, burglar alarm, environmental monitoring, HVAC control, infrared forwarding and programmable Timer control.Compared with common household, Smart Home not only has traditional inhabitation function, has both building, network service, information household appliances, equipment automatization, provides omnibearing information interaction function, even economizes on the use of funds for various energy expenditure.
General Smart Home such as comprises the product controlled switch and/or socket even load, and such product such as often makes Current Transformer detect load current size, and such technology has following shortcoming: a: current transformer volume ratio is larger; B: current transformer must switching device open loaded work piece have electric current to flow through time, could load be judged; C: current transformer is connected on the live wire of access arrangement usually, when system opens switching device, system is by judging the size of the direct voltage that current transformer converts, the size of judgment device total load; D: the size that detect the load of every road, a current transformer of must connecting in the load of every road; E: the load that current transformer detects is not real-time but the mean value of a period of time; F: when working long hours, current transformer easily generates heat; G: when load current is greater than the rated current of current transformer, current transformer easily burns; H: can not according to the operational environment control switch break-over of device of system or cut-off.
Summary of the invention
The main purpose of each embodiment of the present disclosure is at least one item in the following: the system providing a kind of load monitoring for Smart Home; A kind of method of the load monitoring for Smart Home is provided.
An aspect of the present disclosure provides a kind of system of the load monitoring for Smart Home, it is characterized in that, comprising:
Be connected to one or more groups load circuit between zero line and live wire, often organize load circuit and comprise switching device and load;
Often organize the sample circuit be made up of sample resistance of drawing between load circuit breaker in middle device and load;
Zero passage waveform detection circuit, for obtaining zero passage waveform from described zero line and the sampling of described live wire;
Comparison circuit, for sampling the voltage waveform that obtains and described zero passage waveform compares and generates comparison signal by described sample circuit;
Control circuit, for generating control signal according to described comparison signal, and controls described switching device with conducting or end described load according to described control signal.
According to an embodiment of the present disclosure, also comprise at least one item in the following:
Amplifying circuit, for amplifying described voltage waveform;
Filter circuit, for carrying out filtering to described voltage waveform;
Integrating circuit, inputs described comparison circuit after respectively described voltage waveform and described zero passage waveform being carried out integration;
Power supply circuits, for the alternating voltage between described zero line and described live wire is converted to direct voltage, described power supply circuits and described control circuit are interconnected.
According to an embodiment of the present disclosure, described comparison circuit is configured to the power comparing described voltage waveform and described zero passage waveform to converse described load, and described comparison signal is mutually corresponding with the power of described load.
According to an embodiment of the present disclosure, described control circuit is configured to the electric current calculating described load according to the power of described load and the operating voltage between described zero line and described live wire, and described control signal is mutually corresponding with the electric current of described load.
According to an embodiment of the present disclosure, described control circuit to be configured to the power of described load divided by the operating voltage between described zero line and described live wire to calculate the electric current of described load.
According to an embodiment of the present disclosure, described control circuit is configured to:
When the maximum current that the electrical characteristic that the electric current of described load is greater than described switching device requires, control described switching device to end described load; And
When the maximum current that the electrical characteristic that the electric current of described load is not more than described switching device requires, control described switching device with load described in conducting.
According to an embodiment of the present disclosure, the maximum current that the electrical characteristic of wherein said switching device requires is the result that the rated operational current of described switching device obtains divided by N, and the span of N is 2 to 20.
According to an embodiment of the present disclosure, also comprise:
According to described voltage waveform, load condition decision circuitry, for judging whether described load damages and/or loose contact;
Wherein said control circuit controls described switching device to end described load when described load damage and/or loose contact.
According to an embodiment of the present disclosure, also comprise:
Ambient voltage decision circuitry, for judging the ambient voltage between described zero line and described live wire according to described zero passage waveform;
The maximum current that the electrical characteristic of wherein said switching device requires changes according to different ambient voltages; Described control circuit is configured to control described switching device with load described in cut-off or conducting at the zero crossing place of described zero passage waveform.
An aspect of the present disclosure additionally provides a kind of method of the load monitoring for Smart Home, it is characterized in that, comprising:
Between zero line and live wire, connect one or more groups load circuit, often organize load circuit and comprise switching device and load;
Obtain voltage waveform often organizing between load circuit breaker in middle device and load sampling, and obtain zero passage waveform from described zero line and the sampling of described live wire;
Described voltage waveform and described zero passage waveform are compared the power conversing described load; And
Generate control signal according to the power of described load, and control described switching device with conducting or end described load according to described control signal, comprising:
Judge whether described load damages and/or loose contact according to described voltage waveform;
Described switching device is controlled to end described load when described load damage and/or loose contact;
When described load does not damage and contacts good, with the power of described load divided by the operating voltage between described zero line and described live wire to calculate the electric current of described load;
When the maximum current that the electrical characteristic that the electric current of described load is greater than described switching device requires, control described switching device to end described load;
When the maximum current that the electrical characteristic that the electric current of described load is not more than described switching device requires, control described switching device with load described in conducting;
The maximum current that the electrical characteristic of wherein said switching device requires is the result that the rated operational current of described switching device obtains divided by N, and the span of N is 2 to 20;
The maximum current that the electrical characteristic of wherein said switching device requires changes according to different ambient voltages, and described ambient voltage is by judging that described zero passage waveform obtains;
Wherein control described switching device with load described in cut-off or conducting at the zero crossing place of described zero passage waveform.
Compared with prior art, the disclosure has the following advantages: obtain voltage waveform owing to adopting the sample circuit be made up of sample resistance to sample, and itself and zero passage waveform detection circuit are sampled obtain zero passage waveform and compare and generate comparison signal, generate control signal according to described comparison signal simultaneously, and control described switching device with conducting or end described load according to described control signal, therefore the defect that Current Transformer is brought can be avoided, thus a kind of system of the load monitoring for Smart Home is provided, it can make the volume of whole Circuits System miniaturized, and the state of monitoring load in real time, better protection switch device and load, and caloric value is much smaller than current transformer, is conducive to the protection of heat radiation and Circuits System, the life-span of whole Circuits System thus can be made to be better than the structure of current transformer, in addition, described switching device can be controlled with conducting or end described load, thus end described load in time when exception, and conducting load in time in use, easy to use, in addition, a kind of method of the load monitoring for Smart Home of correspondence can also be provided.
Accompanying drawing explanation
In order to clearer explanation technical scheme of the present disclosure, below the accompanying drawing used required in describing embodiment is briefly described, apparent, accompanying drawing in the following describes is only embodiments more of the present disclosure, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the system of the load monitoring for Smart Home of a disclosure embodiment;
Fig. 2 is the structural representation of the system of the load monitoring for Smart Home of another embodiment of the disclosure;
Fig. 3 is the load of disclosure embodiment is the voltage waveform of 105 watts of electricity-saving lamps and the comparison schematic diagram of zero passage waveform;
Fig. 4 is the load of disclosure embodiment is the voltage waveform of 200 watts of electricity-saving lamps and the comparison schematic diagram of zero passage waveform;
Fig. 5 is that under the 220V/50HZ ambient voltage of disclosure embodiment, load is the schematic diagram of the voltage waveform of 35W;
Fig. 6 is non-loaded under the 220V/50HZ ambient voltage of disclosure embodiment or the schematic diagram of the voltage waveform of load damage;
Fig. 7 is the schematic diagram of zero passage waveform under the 100V/50HZ ambient voltage of disclosure embodiment;
Fig. 8 is the schematic diagram of zero passage waveform under the 120V/50HZ ambient voltage of disclosure embodiment;
Fig. 9 is the schematic diagram of zero passage waveform under the 180V/50HZ ambient voltage of disclosure embodiment;
Figure 10 is the schematic diagram of zero passage waveform under the 220V/50HZ ambient voltage of disclosure embodiment;
Figure 11 is the schematic diagram of zero passage waveform under the 260V/50HZ ambient voltage of disclosure embodiment.
Embodiment
Below in conjunction with the accompanying drawing in disclosure embodiment; clear, complete description is carried out to the technical scheme in disclosure embodiment; obviously described embodiment is only a part of this disclosure embodiment; it not whole embodiments; based on the embodiment in the disclosure; those of ordinary skill in the art are not paying the every other embodiment obtained under creative work prerequisite, all belong to the scope of disclosure protection.
As shown in Figure 1, disclosure embodiment provides a kind of system of the load monitoring for Smart Home, comprise: be connected to one or more groups load circuit between zero line and live wire, often organize load circuit and comprise switching device (the switching power device in such as Fig. 1) and load; Often organize the sample circuit be made up of sample resistance (resistance R1, R2, R3 and R4 in such as Fig. 1) of drawing between load circuit breaker in middle device and load; Zero passage waveform detection circuit (resistance R5, R6, R7, R8 and R9 in such as Fig. 1), for obtaining zero passage waveform from described zero line and the sampling of described live wire; Comparison circuit (the internal integral Compare Logic in such as Fig. 1), for sampling the voltage waveform that obtains and described zero passage waveform compares and generates comparison signal by described sample circuit; Control circuit (such as comprising CPU), for generating control signal according to described comparison signal, and controls described switching device with conducting or end described load according to described control signal.
Such as, voltage waveform is obtained owing to adopting the sample circuit be made up of sample resistance to sample, and itself and zero passage waveform detection circuit are sampled obtain zero passage waveform and compare and generate comparison signal, generate control signal according to described comparison signal simultaneously, and described switching device is with conducting or end described load to control (such as being controlled by the switching power device control logic in Fig. 1 and driving) according to described control signal, therefore the defect that Current Transformer is brought can be avoided, thus a kind of system of the load monitoring for Smart Home is provided, it can make the volume of whole Circuits System miniaturized, and the state of monitoring load in real time, better protection switch device and load, and caloric value is much smaller than current transformer, is conducive to the protection of heat radiation and Circuits System, the life-span of whole Circuits System thus can be made to be better than the structure of current transformer, in addition, described switching device can be controlled with conducting or end described load, thus end described load in time when exception, and conducting load in time in use, easy to use.
Such as, the system of the load monitoring for Smart Home of the present disclosure can make the product such as Intelligent life headlamp switch module, Intelligent life brightness adjustment control module, breaching in current industry by the technology of large volume current transformer monitoring load (such as detecting load current), to make integral product volume miniaturized.Such as, product of the present disclosure also can solve current Intelligent internet of things equipment actual installation, the problems such as Consumer's Experience are (such as because integral product volume is little, therefore can be applied in switch traditional at present, socket), family can be applied to, hotel, in the Intelligent internet of things platform on the use occasion bases such as office block, and because such open platform allows more intelligent equipment to enter, life therefore such as really can be realized intelligent.
Such as, system (such as Circuits System) in the disclosure can make corresponding load monitoring product, such as the circuit board with disclosure Circuits System is arranged in shell, make corresponding load monitoring module (such as Intelligent life headlamp switch module, Intelligent life brightness adjustment control module, Intelligent life safety socket module, Intelligent life curtain control module), such product can have such as following advantage: 1: the module that volume is minimum in the industry, can be positioned over box at the bottom of domestic and international 86 types; 2: without the need to rewiring, only need place such module inside box at the bottom of original 86 types and just can realize Smart Home; 3: do not change the original decoration style of client; 4: do not change the original habits and customs of client; 5: be applicable to Different age group, such as the elderly can use conventional keys, and young man can control with mobile terminal; 6: the actual working state of Real-time Feedback load, if load is broken down, then automatic cut-off (such as closing) load, ensures use safety; 7: DIY application model (such as can do it yourself to install) can be realized, easy maintenance and replacement.
As shown in Figure 2, such as, system of the present disclosure is when detecting multiple load, can arrange and organize load circuit more, only need increase the control circuit of corresponding sample circuit and corresponding switching device, and zero passage waveform detection circuit can share a road, the embodiment of two-way load system shown in Figure 2.
According to an embodiment of the present disclosure, also comprise at least one item in the following: amplifying circuit (signal amplification circuit in such as Fig. 1), for amplifying described voltage waveform; Filter circuit, for carrying out filtering to described voltage waveform; Integrating circuit, inputs described comparison circuit after respectively described voltage waveform and described zero passage waveform being carried out integration; Power supply circuits (the ACTODC supply module in such as Fig. 1), for the alternating voltage between described zero line and described live wire is converted to direct voltage, described power supply circuits and described control circuit are interconnected.
Such as, the disclosure is by the often voltage waveform of the corresponding load of way switch device when powering on zero line of the sample circuit (such as being sampled by some pulse resistances) from switching device output, through circuit such as amplification, filtering, obtain the work wave (such as voltage waveform) of load.
Such as, the disclosure can carry out integration by sampling the voltage waveform that obtain with the zero passage waveform obtained of sampling from zero live wire respectively, thus makes to detect voltage waveform and zero passage waveform in certain hour section, and then inputs comparison circuit and carry out subsequent treatment.
According to an embodiment of the present disclosure, described comparison circuit is configured to the power comparing described voltage waveform and described zero passage waveform to converse described load, and described comparison signal is mutually corresponding with the power of described load.
Such as, the disclosure is carried out integration by sampling the voltage waveform obtained with the zero passage waveform obtained of sampling from zero live wire, is compared process, thus converses the power of load.Such as, the disclosure can in conjunction with corresponding ambient voltage (such as domestic 220V voltage, some national 110V voltage) power of load that calculates, such as shown in Fig. 3 (105W bearing power is shown), Fig. 4 (200W bearing power is shown) and table 1, the table of comparisons between the difference that illustrated therein is the load of different capacity and the maximum voltage value of voltage waveform and zero passage waveform when 220V/50HZ ambient voltage.
Table 1
Such as, as shown in table 1, comparison circuit is configured to that described voltage waveform (maximum voltage value of the voltage waveform such as sampled) and described zero passage waveform (maximum voltage value of the zero passage waveform of such as sampling) are compared (difference both such as obtaining), and to converse the power of described load, (such as difference is larger, corresponding bearing power is larger), (such as comparison signal can have corresponding value to described comparison signal, such as performance number) with the power of described load mutually corresponding (such as comparison signal has the performance number identical with the power of load).
Such as, as shown in table 1, if the maximum voltage value of the voltage waveform of sampling is 1280mv/1480mv, and the maximum voltage value of the zero passage waveform of sampling is that 620mv (determined by ambient voltage by this value, its value determine under fixed ambient voltage substantially identical, it is substantially all such as the ambient voltage of 220V/50HZ in China, the maximum voltage value of its zero passage waveform corresponding is generally also determined), then both differences are 660mv/860mv, as can be seen here, such difference (such as voltage difference) can be obtained by Circuits System of the present disclosure.
Such as, after obtaining such difference, corresponding bearing power can be estimated according to such difference, such as can estimate based on experience value (such as can early stage by the different voltage environment of a large amount of test under the sampling voltage value of load of different capacity, obtain different sampling voltage value performance number one to one), or also according to the mapping table between the bearing power be stored in advance in such as process chip or background computer magnitude of voltage different under ambient voltage, the value of corresponding bearing power can be obtained by searching such mapping table.Such mapping table.
According to an embodiment of the present disclosure, described control circuit is configured to the electric current calculating described load according to the power of described load and the operating voltage between described zero line and described live wire, and described control signal is mutually corresponding with the electric current of described load.
Such as, the power of load calculates the electric current of described load divided by operating voltage, or the power of load divided by operating voltage and constant M (such as M be greater than 1 positive integer) calculate the electric current of described load.Such as, control signal is mutually corresponding with the electric current of described load, and such as control signal can select the value of the electric current equal with the electric current of load.
According to an embodiment of the present disclosure, described control circuit to be configured to the power of described load divided by the operating voltage between described zero line and described live wire to calculate the electric current of described load.
Such as, the formula of the electric current of load described in computing formula is: the operating voltage (unit is V) between power (unit is W)/zero live wire of electric current (unit is the A)=load of load.
Such as at 220V50HZ ambient voltage, (operating voltage such as between zero live wire can be identical with ambient voltage, also can be proportional with it) under, the electric current of the load corresponding to unequally loaded power can be obtained, the load current=35W/220V=0.15A of such as 35W load; Load current=the 50W/220V=0.227A of 50W load; Load current=the 100W/220V=0.455A of 100W load; Load current=the 200W/220V=0.909A of 200W load; By the calculating of such value, the electric current of the corresponding load of different loads power (such as 35W, 50W, 100W, 200W) can be obtained, facilitate follow-up use.
According to an embodiment of the present disclosure, described control circuit is configured to: when the electric current of described load is greater than the maximum current of electrical characteristic requirement of described switching device, control described switching device to end described load; And when the electric current of described load is not more than the maximum current of electrical characteristic requirement of described switching device, control described switching device with load described in conducting.
Such as, the electrical characteristic of the switching device that the disclosure can use in combined with intelligent household, the conducting of real-time control switch device/by (such as conducting/by frequency): 1: the steady-state current that can obtain the needs of loaded work piece by bearing power divided by operating voltage, when load current is greater than the maximum current of switching device electrical characteristic requirement, reminding user positive opening load can be dangerous, do not advise opening load; 2: the steady-state current that can obtain the needs of loaded work piece by bearing power divided by operating voltage, when load current is less than or equal to the maximum current of switching device electrical characteristic requirement, open switching device according to switching device electrical characteristic.
According to an embodiment of the present disclosure, the maximum current that the electrical characteristic of wherein said switching device requires is the result that the rated operational current of described switching device obtains divided by N, and the span of N is 2 to 20.
Such as; the maximum current of the electrical characteristic requirement of switching device (such as relay); different impulse current that can be corresponding according to different load types is arranged; impulse current due to load is all generally the several times of its steady-state current; ginseng is shown in Table 2; in order to protect load (namely control switch device does not reach the value of load shock electric current yet), the rated operational current/N of maximum current=switching device that the electrical characteristic can choosing switching device requires.
Such as; N can get 20; also rated operational current/20 of the maximum current=switching device of the i.e. electrical characteristic requirement of switching device; now the rated operational current of switching device is first reduced 20 times as threshold value; the electric current of control load does not exceed such threshold value; thus (such as can not reach the impulse current of load, can not cause damage to it) is played a protective role to load.Such as, the corresponding relation ginseng of the impulse current corresponding to different loads kind is shown in Table 2.
Table 2
| The kind of load | The impulse current of load |
| Resistive load | 1 times of the steady-state current of load |
| Motor load | 5 ~ 10 times of the steady-state current of load |
| Capacitive load | 20 ~ 40 times of the steady-state current of load |
| Transformer load | 5 ~ 15 times of the steady-state current of load |
| Solenoid coil load | 10 ~ 20 times of the steady-state current of load |
| Incandescent lamp loads | 10 ~ 15 times of the steady-state current of load |
| Mercury vapor lamp load | 3 times of the steady-state current of load |
| Sodium vapor lamp load | 1 ~ 3 times of the steady-state current of load |
Such as, the maximum current that the electrical characteristic of switching device requires can be also a gear with 1A, therefore some gears can be set and get final product (accurately need not distinguish the maximum current of the different value required by electrical characteristic of different switching devices), 1A (220W) is such as set, 2A (440W), three gears that 3A (660W) is such, when the electric current of load is less than 1A (220W), can conducting load; When the electric current of load is greater than 2A (440W), keeps the conducting of load but point out user dangerous (such as electric current is excessive may damage load); When the electric current of load is greater than 3A (660W), load (such as protection load is not damaged) can be ended.
According to an embodiment of the present disclosure, also comprise: load condition decision circuitry, for judging whether described load damages and/or loose contact according to described voltage waveform; Wherein said control circuit controls described switching device to end described load when described load damage and/or loose contact.
Such as, because current transformer must could judge under the prerequisite opening switching device whether load damages (when namely having electric current to flow through), whether loose contact, therefore, if the electrical characteristic of the load of opening and switching device is not mated, possible snap switch device just burns; In addition, current transformer can not real-time monitor the power utilization environment (such as ambient voltage) that entire system is run, and the switching device of control load therefore can not be made to reach work optimum.
Different from current transformer, the disclosure can power on regard to real-time judge load condition, the power utilization environment of system cloud gray model.The disclosure can detect when powering on whether load damages or whether loose contact, during disclosure system electrification when not opening switching device, by reading, judging the voltage waveform from the sampling of switching device output, can load condition be judged, such as:
1: when voltage waveform is half sine wave (as shown in Figure 5), can judge that load condition is good, system of the present disclosure can continue to compare load current and switching device electrical characteristic, determines whether opening switching device;
2: when voltage waveform is a straight line (as shown in Figure 6), can judge that load does not install or load damages, now can such as notify that client detects load, even if customer requirement opens load, system of the present disclosure does not also open switching device, ensures user's use safety.
According to an embodiment of the present disclosure, also comprise: ambient voltage decision circuitry, for judging the ambient voltage between described zero line and described live wire according to described zero passage waveform; The maximum current that the electrical characteristic of wherein said switching device requires changes according to different ambient voltages; Described control circuit is configured to control described switching device with load described in cut-off or conducting at the zero crossing place of described zero passage waveform.
Such as, the time span that the highest numerical value of each sinusoidal wave half-wave that the disclosure can read zero passage waveform occurs and the frequency that minimum point occurs, ambient voltage situation (voltage swing, the frequency of such as zero passage waveform) can be judged according to Fig. 7 ~ Figure 11 and table 3, system of the present disclosure like this can be different according to the opering characteristic of electric apparatus of actual switch device under ambient voltage, and the electric current in conjunction with load carrys out control switch device.Such as, table 3 show zero passage waveform different time corresponding ambient voltage (such as voltage swing and high level lasting time) the different table of comparisons, the size of such as ambient voltage and high level lasting time are all different.
Table 3
| Ambient voltage | The high level lasting time of ambient voltage | Remarks |
| 100V | 4.2ms | 50HZ |
| 120V | 5.0ms | 50HZ |
| 140V | 5.6ms | 50HZ |
| 160V | 6.0ms | 50HZ |
| 180V | 6.4ms | 50HZ |
| 200V | 6.8ms | 50HZ |
| 220V | 7.2ms | 50HZ |
| 240V | 7.4ms | 50HZ |
| 260V | 7.8ms | 50HZ |
Such as, the power utilization environment (such as ambient voltage) that the disclosure can be run in the real-time judge whole system that powers on, the zero passage waveform such as sampled from zero live wire can at integration, after the process such as filtering, judge the size of the system power supply corresponding with it, frequency, thus the difference of environmentally voltage, better in conjunction with electrical characteristic (the such as ambient voltage difference of switching device, the electrical characteristic of corresponding switching device is also different), (such as ambient voltage is different with load described in cut-off or conducting for control switch device, corresponding zero crossing is also different, described switching device can be controlled with load described in cut-off or conducting) at different zero crossings.
Such as; the disclosure can open switching device when zero cross signal minimum point (i.e. the zero crossing of AC signal); facts have proved that this unfolding mode can make startability steadily (ratio of such as di/dt is little); little to electrical network radiated interference; and the back electromotive force of inductive load also can be reduced when turning off, there is certain protective effect to load (such as electrical equipment) and switching device (such as solid-state relay).
An aspect of the present disclosure additionally provides a kind of method of the load monitoring for Smart Home, comprising:
Between zero line and live wire, connect one or more groups load circuit, often organize load circuit and comprise switching device and load;
Obtain voltage waveform often organizing between load circuit breaker in middle device and load sampling, and obtain zero passage waveform from described zero line and the sampling of described live wire;
Described voltage waveform and described zero passage waveform are compared the power conversing described load; And
Generate control signal according to the power of described load, and control described switching device with conducting or end described load according to described control signal, comprising:
Judge whether described load damages and/or loose contact according to described voltage waveform;
Described switching device is controlled to end described load when described load damage and/or loose contact;
When described load does not damage and contacts good, with the power of described load divided by the operating voltage between described zero line and described live wire to calculate the electric current of described load;
When the maximum current that the electrical characteristic that the electric current of described load is greater than described switching device requires, control described switching device to end described load;
When the maximum current that the electrical characteristic that the electric current of described load is not more than described switching device requires, control described switching device with load described in conducting;
The maximum current that the electrical characteristic of wherein said switching device requires is the result that the rated operational current of described switching device obtains divided by N, and the span of N is 2 to 20;
The maximum current that the electrical characteristic of wherein said switching device requires changes according to different ambient voltages, and described ambient voltage is by judging that described zero passage waveform obtains;
Wherein control described switching device with load described in cut-off or conducting at the zero crossing place of described zero passage waveform.
Such as, system and method of the present disclosure can be applied and Smart Home field, such as Circuits System of the present disclosure can make corresponding product (such as adopting the structure of circuit board), circuit board in such product can adopt the structure of polylith circuit board, such as plug-in connected mode can be adopted between polylith circuit board, such as the highest for technological requirement in production, the part the most easily gone wrong adopts plug-in structure, improve and produce yield, conveniently pinpoint the problems fast aborning, deal with problems, facilitate subsequent product to upgrade.
Such as, above method can be implemented as the flow process comprised the following steps: (1) equipment (such as system of the present disclosure) powers on; (2) CPU zero passage detection reads magnitude of voltage A, and judges environmental work voltage B according to table 3; (3) CPU judges whether load sample resistance waveform is straight line: if then represent load open circuit, and notice customer loads damages; If otherwise continue step (4); (4) filtering, integration load sample resistance waveform obtains magnitude of voltage C; (5) size of comparing voltage value A and magnitude of voltage C obtains difference D; (6) bearing power E is obtained by corresponding with numerical value in table 1 for difference D; (7) CPU computational load electric current F=bearing power E/ environmental work voltage B; (8) CPU judges whether load is greater than switching device maximum current: if then CPU disconnects load, and feed back to client; If not, then connect load, system worked well of the present disclosure.
Through the above description of the embodiments, those skilled in the art can be well understood to the disclosure and can also be realized by other structures, and feature of the present disclosure is not limited to above-mentioned preferred embodiment.Any personnel being familiar with this technology are in technical field of the present disclosure, and the change that can expect easily or modification, all should be encompassed within scope of patent protection of the present disclosure.
Claims (10)
1. for a system for the load monitoring of Smart Home, it is characterized in that, comprising:
Be connected to one or more groups load circuit between zero line and live wire, often organize load circuit and comprise switching device and load;
Often organize the sample circuit be made up of sample resistance of drawing between load circuit breaker in middle device and load;
Zero passage waveform detection circuit, for obtaining zero passage waveform from described zero line and the sampling of described live wire;
Comparison circuit, for sampling the voltage waveform that obtains and described zero passage waveform compares and generates comparison signal by described sample circuit;
Control circuit, for generating control signal according to described comparison signal, and controls described switching device with conducting or end described load according to described control signal.
2. system according to claim 1, is characterized in that, also comprises at least one item in the following:
Amplifying circuit, for amplifying described voltage waveform;
Filter circuit, for carrying out filtering to described voltage waveform;
Integrating circuit, inputs described comparison circuit after respectively described voltage waveform and described zero passage waveform being carried out integration;
Power supply circuits, for the alternating voltage between described zero line and described live wire is converted to direct voltage, described power supply circuits and described control circuit are interconnected.
3. system according to claim 1, is characterized in that, described comparison circuit is configured to the power comparing described voltage waveform and described zero passage waveform to converse described load, and described comparison signal is mutually corresponding with the power of described load.
4. system according to claim 3, it is characterized in that, described control circuit is configured to the electric current calculating described load according to the power of described load and the operating voltage between described zero line and described live wire, and described control signal is mutually corresponding with the electric current of described load.
5. system according to claim 4, is characterized in that, described control circuit to be configured to the power of described load divided by the operating voltage between described zero line and described live wire to calculate the electric current of described load.
6. system according to claim 5, is characterized in that, described control circuit is configured to:
When the maximum current that the electrical characteristic that the electric current of described load is greater than described switching device requires, control described switching device to end described load; And
When the maximum current that the electrical characteristic that the electric current of described load is not more than described switching device requires, control described switching device with load described in conducting.
7. system according to claim 6, is characterized in that, the maximum current that the electrical characteristic of wherein said switching device requires is the result that the rated operational current of described switching device obtains divided by N, and the span of N is 2 to 20.
8. system according to claim 6, is characterized in that, also comprises:
According to described voltage waveform, load condition decision circuitry, for judging whether described load damages and/or loose contact;
Wherein said control circuit controls described switching device to end described load when described load damage and/or loose contact.
9. system according to claim 6, is characterized in that, also comprises:
Ambient voltage decision circuitry, for judging the ambient voltage between described zero line and described live wire according to described zero passage waveform;
The maximum current that the electrical characteristic of wherein said switching device requires changes according to different ambient voltages; Described control circuit is configured to control described switching device with load described in cut-off or conducting at the zero crossing place of described zero passage waveform.
10. for a method for the load monitoring of Smart Home, it is characterized in that, comprising:
Between zero line and live wire, connect one or more groups load circuit, often organize load circuit and comprise switching device and load;
Obtain voltage waveform often organizing between load circuit breaker in middle device and load sampling, and obtain zero passage waveform from described zero line and the sampling of described live wire;
Described voltage waveform and described zero passage waveform are compared the power conversing described load; And
Generate control signal according to the power of described load, and control described switching device with conducting or end described load according to described control signal, comprising:
Judge whether described load damages and/or loose contact according to described voltage waveform;
Described switching device is controlled to end described load when described load damage and/or loose contact;
When described load does not damage and contacts good, with the power of described load divided by the operating voltage between described zero line and described live wire to calculate the electric current of described load;
When the maximum current that the electrical characteristic that the electric current of described load is greater than described switching device requires, control described switching device to end described load;
When the maximum current that the electrical characteristic that the electric current of described load is not more than described switching device requires, control described switching device with load described in conducting;
The maximum current that the electrical characteristic of wherein said switching device requires is the result that the rated operational current of described switching device obtains divided by N, and the span of N is 2 to 20;
The maximum current that the electrical characteristic of wherein said switching device requires changes according to different ambient voltages, and described ambient voltage is by judging that described zero passage waveform obtains;
Wherein control described switching device with load described in cut-off or conducting at the zero crossing place of described zero passage waveform.
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