CN104242668A - Voltage-steady field terminal watching over device - Google Patents
Voltage-steady field terminal watching over device Download PDFInfo
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- CN104242668A CN104242668A CN201410534624.1A CN201410534624A CN104242668A CN 104242668 A CN104242668 A CN 104242668A CN 201410534624 A CN201410534624 A CN 201410534624A CN 104242668 A CN104242668 A CN 104242668A
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- 239000003990 capacitor Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a voltage-steady field terminal watching over device which comprises a solar cell. A control circuit is connected on the solar cell and comprises a power input filter circuit, a pulse width modulation circuit, a push-pull converter and an output circuit which are all connected in sequence, a buffer circuit is connected on the push-pull converter, and a feedback circuit is connected between the output circuit and the pulse width modulation circuit. The voltage-steady field terminal watching over device is steady in voltage supplied by the solar cell.
Description
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Technical field
The present invention relates to disaster monitoring device field, more particularly, relate to the field terminal device on duty that a kind of voltage supply is stable.
Background technology
Sichuan is in basin, and its water yield is large, makes the ground that takes place frequently becoming bloods and droughts, and climate change, the aggravation of activity in production, and Extreme Weather Events exacerbates the generation of floods and droughts the condition of a disaster more.As one of natural calamity the most serious in the world, flood is almost annual all to be occurred in China, and the casualties that its frequent degree and other natural calamities caused thereof cause and property loss, far above developed country.
When utilizing the situation of terminal device on duty in field to field to monitor, build from the viewpoint of circuit, energy savings, general employing solar energy is powered to its terminating machine, its solar cell is arranged on field terminal device on duty and not only can powers to it, there is spatter property and flexibility, but also can be field terminal device on duty and keep out wind and rain.The application of solar cell in the wild in terminal device on duty is very extensive, but, due to some place sunshine not, Changes in weather problem or other reasons, make the spread of voltage of solar cell, namely make the voltage supply of field terminal device on duty unstable.
Summary of the invention
Technical problem to be solved by this invention is to provide the stable field terminal device on duty of a kind of voltage supply, and its solar cell voltage supply is stablized.
The present invention's adopted technical scheme that solves the problem is:
The field terminal device on duty that voltage supply is stable, comprise solar cell, described solar cell is connected with control circuit, described control circuit comprises the power supply input filter circuit, pulse-width modulation circuit, push-pull converter and the output circuit that connect successively, described push-pull converter is connected with buffer circuit, between described output circuit and control circuit for pulse-width modulation, is connected with feedback circuit.Under night or the bad situation of weather conditions, the output voltage of more piece solar cell series connection is 8-9V, does not meet the voltage instructions for use of field terminal device on duty, utilizes control circuit to boost to voltage.This control circuit mainly comprises pulse-width modulation circuit and push-pull converter two parts.Power supply input filter circuit carries out filtering to noise, and it mainly suppresses the coupling of direct current public power noise, removes external interference, and suppresses the noise that circuit self produces because of curtage change.The direct voltage exported when solar cell is eliminated after interference through power supply input filter circuit, by pulse-width modulation circuit, pulsewidth is modulated, voltage after modulation output dc voltage after push-pull converter, the voltage of feedback circuit to output circuit feeds back, if voltage is certain value, then directly export, if voltage is less than certain value, export again after feedback boosting boosts to certain value, the continued power of power supply can be ensured.The power BJT that push-pull converter adopts two parameters identical manage or MOSFET pipe as switching tube, voltage waveform is amplified, the little efficiency of its conduction loss is high, the moment that its switching tube is turning off can produce very high spike, also very high Reverse recovery spike is there will be in reversely restoring process, therefore the voltage born when utilizing buffer circuit switch tube to turn on and off improves, and absorbs spike.
As preferably, between described push-pull converter and output circuit, be connected with current rectifying and wave filtering circuit.Current rectifying and wave filtering circuit carries out filtering again to the voltage exported and alternating current is converted to direct current exporting, the stability of intensifier circuit.
Further, described power supply input filter circuit comprises two ground capacities, and an electric capacity is electrochemical capacitor, and another electric capacity is ceramic disc capacitor.The capacitance of electrochemical capacitor is little, and the capacitance of ceramic disc capacitor is large, adopts the cooperation of low capacitance electric capacity and high capacitance electric capacity, effectively can absorb external interference.
Further, described push-pull converter comprises the inverter, rectifier filter circuit and the drive circuit that connect successively.Inverter realizes the conversion between DC and AC, and rectifier filter circuit realizes the conversion between AC and DC, drives subsequent conditioning circuit to export to drive circuit.
To sum up, the invention has the beneficial effects as follows:
1, the direct voltage that solar cell of the present invention exports is eliminated after interference through power supply input filter circuit, by pulse-width modulation circuit, pulsewidth is modulated, voltage after modulation output dc voltage after push-pull converter, the voltage of feedback circuit to output circuit feeds back, if voltage is certain value, then directly export, if voltage is less than certain value, export again after feedback boosting boosts to certain value, ensure the stable output of solar array voltage.
2, the voltage born when the present invention utilizes the switching tube of buffer circuit to push-pull converter to turn on and off improves, and absorbs spike, improves the stability that voltage exports.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited thereto.
Embodiment 1:
The field terminal device on duty that a kind of voltage supply is as shown in Figure 1 stable, comprise solar cell, described solar cell is connected with control circuit, described control circuit comprises the power supply input filter circuit, pulse-width modulation circuit, push-pull converter and the output circuit that connect successively, described push-pull converter is connected with buffer circuit, between described output circuit and control circuit for pulse-width modulation, is connected with feedback circuit.
The output of output circuit directly can connect the controller of field terminal device on duty or directly connect storage battery, the output voltage of solar cell has multiple situation, be greater than, be equal to or less than certain value, the optimum operating voltage of the controller of this certain value and field terminal device on duty, the output voltage of solar cell is eliminated after interference through power supply input filter circuit, by pulse-width modulation circuit, pulsewidth is modulated, voltage after modulation output dc voltage after push-pull converter, the voltage of feedback circuit to output circuit feeds back, if voltage is certain value, then directly export, if voltage is less than certain value, export again after feedback boosting boosts to certain value, the continual and steady power supply of power supply can be ensured.
Embodiment 2:
The field terminal device on duty that a kind of voltage supply is as shown in Figure 1 stable, in order to improve the output characteristic of circuit, the present embodiment is optimized on above-described embodiment, namely between described push-pull converter and output circuit, connects current rectifying and wave filtering circuit.Utilize current rectifying and wave filtering circuit to carry out filter shape again at the port of output circuit to voltage, strengthen the stability that voltage exports.
Also carried out refinement to power supply input filter circuit, namely described power supply input filter circuit comprises two ground capacities, and an electric capacity is electrochemical capacitor, and another electric capacity is ceramic disc capacitor.
Embodiment 3:
The field terminal device on duty that a kind of voltage supply is as shown in Figure 1 stable, the present embodiment has done refinement on above-described embodiment, and namely described push-pull converter comprises the inverter, rectifier filter circuit and the drive circuit that connect successively.
As mentioned above, the present invention can be realized preferably.
Claims (4)
1. the field terminal device on duty that voltage supply is stable, comprise solar cell, it is characterized in that: described solar cell is connected with control circuit, described control circuit comprises the power supply input filter circuit, pulse-width modulation circuit, push-pull converter and the output circuit that connect successively, described push-pull converter is connected with buffer circuit, between described output circuit and control circuit for pulse-width modulation, is connected with feedback circuit.
2. the field terminal device on duty that voltage supply according to claim 1 is stable, is characterized in that: be connected with current rectifying and wave filtering circuit between described push-pull converter and output circuit.
3. the field terminal device on duty that voltage supply according to claim 1 is stable, is characterized in that: described power supply input filter circuit comprises two ground capacities, and an electric capacity is electrochemical capacitor, and another electric capacity is ceramic disc capacitor.
4. the field terminal device on duty that voltage supply according to claim 1 is stable, is characterized in that: described push-pull converter comprises the inverter, rectifier filter circuit and the drive circuit that connect successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410534624.1A CN104242668A (en) | 2014-10-13 | 2014-10-13 | Voltage-steady field terminal watching over device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410534624.1A CN104242668A (en) | 2014-10-13 | 2014-10-13 | Voltage-steady field terminal watching over device |
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| Publication Number | Publication Date |
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| CN104242668A true CN104242668A (en) | 2014-12-24 |
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| CN201410534624.1A Pending CN104242668A (en) | 2014-10-13 | 2014-10-13 | Voltage-steady field terminal watching over device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4553198A (en) * | 1982-12-10 | 1985-11-12 | Powercube Corporation | Power converter symmetry correction circuit |
| CN202550915U (en) * | 2012-05-17 | 2012-11-21 | 浙江百诺电气有限公司 | Push-pull type inverter |
| CN203071822U (en) * | 2012-12-16 | 2013-07-17 | 常州市巨泰电子有限公司 | Vehicle-mounted voltage converter |
| JP2013258860A (en) * | 2012-06-14 | 2013-12-26 | Murata Mfg Co Ltd | Switching power supply device |
| CN204168148U (en) * | 2014-10-13 | 2015-02-18 | 成都汉康信息产业有限公司 | A kind of field terminal device on duty |
-
2014
- 2014-10-13 CN CN201410534624.1A patent/CN104242668A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4553198A (en) * | 1982-12-10 | 1985-11-12 | Powercube Corporation | Power converter symmetry correction circuit |
| CN202550915U (en) * | 2012-05-17 | 2012-11-21 | 浙江百诺电气有限公司 | Push-pull type inverter |
| JP2013258860A (en) * | 2012-06-14 | 2013-12-26 | Murata Mfg Co Ltd | Switching power supply device |
| CN203071822U (en) * | 2012-12-16 | 2013-07-17 | 常州市巨泰电子有限公司 | Vehicle-mounted voltage converter |
| CN204168148U (en) * | 2014-10-13 | 2015-02-18 | 成都汉康信息产业有限公司 | A kind of field terminal device on duty |
Non-Patent Citations (3)
| Title |
|---|
| 薛俭雷: "太阳能电池升压电路的研究与设计", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 薛俭雷等: "一种太阳能电池升压电路的仿真与实现", 《高师理科学刊》 * |
| 薛俭雷等: "太阳能电池升压电路的设计与仿真", 《微型机与应用》 * |
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Application publication date: 20141224 |
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