CN105485734A - Full-digitalization pulse test pot system of induction cooker - Google Patents
Full-digitalization pulse test pot system of induction cooker Download PDFInfo
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- CN105485734A CN105485734A CN201510978832.5A CN201510978832A CN105485734A CN 105485734 A CN105485734 A CN 105485734A CN 201510978832 A CN201510978832 A CN 201510978832A CN 105485734 A CN105485734 A CN 105485734A
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- 238000012360 testing method Methods 0.000 title claims abstract description 6
- 230000006698 induction Effects 0.000 title abstract 2
- 238000005070 sampling Methods 0.000 claims abstract description 22
- 230000005284 excitation Effects 0.000 claims abstract description 6
- 230000010355 oscillation Effects 0.000 claims description 21
- 238000007689 inspection Methods 0.000 claims description 8
- 230000005856 abnormality Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cookers (AREA)
Abstract
A full-digitalization pulse test pot system of an induction cooker comprises an LC resonance unit, a control circuit and a DSP module. The control circuit sends out pulsed excitation to the LC resonance unit, and the LC resonance unit generates resonance currents; an ADC module for high-speed sampling is arranged in the DSP module, and records sampling resonance current waveforms; and a software chip is further arranged on the control circuit and used for analyzing the resonance current waveforms; and through the software chip algorithm, the resonance current waveforms are analyzed, and a detection result is obtained. The system has the following beneficial effects that a hard interface circuit is simplified, the cost is reduced, reliability is improved, the resonant frequency is recognized, failures of a current sensor are detected, and open-circuit faults of a coil panel are detected.
Description
Technical field
The invention belongs to household appliance technical field, be specifically related to electromagnetic oven total digitalization pulse inspection pot system.
Background technology
Modern electromagnetic oven, considers for the easy to use of people everywhere, is applicable to most of commercial
The pan in kitchen is wide in variety, purchase approach is convenient, but therefore occur that irrational pan is used in the situation on high-power commercial electromagnetic stove, ensure the normal table of high-power commercial electromagnetic stove work, certain requirement is provided with to pot, the pan that high-power commercial electromagnetic stove uses must be iron pan or have certain iron-holder, under the state that just can be operated in normal table, do not possess iron-holder or the few pan of iron-holder has certain injury to high-power commercial electromagnetic stove, affect the service life of electromagnetic oven.
Pulse detection pan has been widely used in various electromagnetic oven scheme, its principle is by main control circuit, a pulse excitation is sent to LC resonant element (i.e. coil panel and resonant capacitance), then lc unit just has oscillating current generation, by detecting the response of resonance current, just pot can be judged whether.
Traditional scheme mainly by the signal of current sensor by comparing with analog comparator, current sampling signal is converted into digit pulse, is counted by single-chip microcomputer, thus judged whether pot.
The weak point of this method is:
(1) resonance current sampled signal, is easily interfered, and comparator oscillating impulse may false triggering;
(2) because resonance current is high-frequency signal, higher to the requirement of analog comparator, cost can be caused to increase;
(3) be difficult to identify pan kind, bad to the applicability of the pot of unlike material;
(4) cannot judge that whether resonance current sensor is abnormal;
(5) cannot judge that coil panel is opened a way.
Summary of the invention
For deficiency of the prior art, the invention provides electromagnetic oven total digitalization pulse inspection pot system, solve the mode combined by analog line and main control chip, hardware circuit is complicated, and be easily disturbed, cost is high, can not identify pan.
The present invention is achieved through the following technical solutions.
Electromagnetic oven total digitalization pulse inspection pot system, comprise LC resonant element, control circuit and DSP module, described control circuit sends pulse excitation to LC resonant element, lc unit produces resonance current, the ADC module for high-speed sampling is provided with in described DSP module, it is characterized in that: described ADC module record sampling harmonic current waveform, described control circuit is also provided with software chip, for analyzing resonance current waveform, realize obtaining testing result to the analysis of resonance current waveform by software chip algorithm, the step of algorithm is as follows:
(1) collection is completed: after the multiple carrier cycle of continuous sampling, the waveform of analytical sampling, when the waveform of sampling reaches 60 times, reappears response curve, after repeatedly adopting, accuracy rate improves, if after experiment repeatedly sampling number to be greater than more than 60 times response curves stable accurately;
(2) setup parameter: by the amplitude of response curve setting waveform, according to the power setting threshold value of electromagnetic oven self, by the mathematic interpolation resonance current number of oscillation of amplitude and threshold value;
(3) decision circuitry:
A () when the amplitude of resonance current waveform is greater than threshold value, then thinks effective vibration, calculate the number of oscillation, within the scope of 2 times to 6 times of the number of oscillation, then think there is pot, the scope of 2 times to 6 times is also through many experiments data gained;
If b () number of oscillation exceedes the scope of 2 times to 6 times of setting, but when being less than maximum setting 11 times, if the oscillation amplitude decay of waveform later stage, then also think there is pot;
If c () (a) (b) does not meet, then think without pot;
If when () number of oscillation is greater than maximum setting 11 times d, or when waveform is random, coil panel open circuit or sensor abnormality.
Compared with prior art: simplify hardware interface circuit, cost-saving, improve reliability, identify resonant frequency, detect current sensor faults, magnetic test coil dish open fault.
Accompanying drawing explanation
Fig. 1 is the resonance current oscillogram under single pulse excitation of the present invention.
Fig. 2 is the inspection pot block diagram of traditional scheme of the present invention.
Fig. 3 is high-speed ADC sampled result when normally to have pot of the present invention.
Fig. 4 is waveform analysis algorithm flow chart of the present invention.
Fig. 5 is all-digital detection block diagram of the present invention.
Fig. 6 is of the present invention without oscillogram during pot.
Fig. 7 is the oscillogram of normal pan of the present invention.
Fig. 8 is the oscillogram of stainless-steel pan of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described further.
Electromagnetic oven total digitalization pulse inspection pot system, comprise LC resonant element, control circuit and DSP module, described control circuit sends pulse excitation to LC resonant element, lc unit produces resonance current, the ADC module for high-speed sampling is provided with in described DSP module, it is characterized in that: described ADC module record sampling harmonic current waveform, described control circuit is also provided with software chip, for analyzing resonance current waveform, realize obtaining testing result to the analysis of resonance current waveform by software chip algorithm, the step of algorithm is as follows:
(1) complete collection: after the multiple carrier cycle of continuous sampling, the waveform of analytical sampling, when the waveform of sampling reaches 60 times, reappears response curve;
(2) setup parameter: by the amplitude of response curve setting waveform, according to the power setting threshold value of electromagnetic oven self, by the mathematic interpolation resonance current number of oscillation of amplitude and threshold value;
(3) decision circuitry:
A () when the amplitude of resonance current waveform is greater than threshold value, then thinks effective vibration, calculate the number of oscillation, within the scope of 2 times to 6 times of the number of oscillation, then think there is pot;
If b () number of oscillation exceedes the scope of 2 times to 6 times of setting, but when being less than maximum setting 11 times, if the oscillation amplitude decay of waveform later stage, then also think there is pot;
If c () (a) (b) does not meet, then think without pot;
If when () number of oscillation is greater than maximum setting 11 times d, or when waveform is random, coil panel open circuit or sensor abnormality.
Electromagnetic oven total digitalization pulse inspection pot system, not only analog comparator can be deleted, simplify circuit structure, save cost, and the shortcoming of conventional method can be overcome, owing to no longer needing analog comparator, then current sampling signal can be directly connected to the ADC entrance of DSP, circuit simplifies greatly, sampled by high-speed ADC, simultaneously within a period of time, continuous record sample waveform, as long as the point of sampling is abundant, then response curve can be reappeared, Fig. 4 is exactly the current waveform recorded by high-speed sampling, the resonance current waveform recorded is true, can be used for waveform analysis.
The effective number of oscillation of positive and negative zero passage 8 times in Fig. 6, amplitude is substantially undamped, can not heat, and the positive and negative effective number of oscillation of the effective number of oscillation of the positive and negative zero passage of Fig. 73, Fig. 89 times, amplitude has obvious decay, can heat.
Protection scope of the present invention includes but not limited to above embodiment, and protection scope of the present invention is as the criterion with claims, and any replacement that those skilled in the art will find apparent that, distortion, improvement made this technology all falls into protection scope of the present invention.
Claims (1)
1. electromagnetic oven total digitalization pulse inspection pot system, comprise LC resonant element, control circuit and DSP module, described control circuit sends pulse excitation to LC resonant element, lc unit produces resonance current, the ADC module for high-speed sampling is provided with in described DSP module, it is characterized in that: described ADC module record sampling harmonic current waveform, described control circuit is also provided with software chip, for analyzing resonance current waveform, realize obtaining testing result to the analysis of resonance current waveform by software chip algorithm, the step of algorithm is as follows:
(1) complete collection: after the multiple carrier cycle of continuous sampling, the waveform of analytical sampling, when the waveform of sampling reaches 60 times, reappears response curve;
(2) setup parameter: by the amplitude of response curve setting waveform, according to the power setting threshold value of electromagnetic oven self, by the mathematic interpolation resonance current number of oscillation of amplitude and threshold value;
(3) decision circuitry:
A () when the amplitude of resonance current waveform is greater than threshold value, then thinks effective vibration, calculate the number of oscillation, within the scope of 2 times to 6 times of the number of oscillation, then think there is pot;
If b () number of oscillation exceedes the scope of 2 times to 6 times of setting, but when being less than maximum setting 11 times, if the oscillation amplitude decay of waveform later stage, then also think there is pot;
If c () (a) (b) does not meet, then think without pot;
If when () number of oscillation is greater than maximum setting 11 times d, or when waveform is random, coil panel open circuit or sensor abnormality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510978832.5A CN105485734B (en) | 2015-12-24 | 2015-12-24 | Pot system is examined in electromagnetic oven total digitalization pulse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510978832.5A CN105485734B (en) | 2015-12-24 | 2015-12-24 | Pot system is examined in electromagnetic oven total digitalization pulse |
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| Publication Number | Publication Date |
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| CN105485734A true CN105485734A (en) | 2016-04-13 |
| CN105485734B CN105485734B (en) | 2018-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510978832.5A Active CN105485734B (en) | 2015-12-24 | 2015-12-24 | Pot system is examined in electromagnetic oven total digitalization pulse |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870616A (en) * | 2017-12-05 | 2019-06-11 | 佛山市顺德区美的电热电器制造有限公司 | Judgment method for the type of peak value circuit, control circuit, cooking utensils and pots |
| CN111214099A (en) * | 2019-10-23 | 2020-06-02 | 浙江苏泊尔家电制造有限公司 | Cooking utensil |
| CN112859647A (en) * | 2019-11-27 | 2021-05-28 | 佛山市顺德区美的电热电器制造有限公司 | Cooking curve adjusting method and device, household appliance and storage medium |
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|---|---|---|---|---|
| CN201021818Y (en) * | 2007-03-01 | 2008-02-13 | 东莞市前锋电子有限公司 | Circuit device for detecting cookware of induction cooker |
| CN201532446U (en) * | 2009-07-09 | 2010-07-21 | 山东艾诺仪器有限公司 | A battery internal resistance testing device |
| CN101909375A (en) * | 2009-06-08 | 2010-12-08 | 深圳市鑫汇科科技有限公司 | High-power electromagnetic oven circuit based on SoC (System On Chip) chip |
| CN102905411A (en) * | 2012-10-17 | 2013-01-30 | 美的集团股份有限公司 | Control circuit for cookware material judgment and method thereof |
| CN104214804A (en) * | 2014-09-15 | 2014-12-17 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and cookware detecting method thereof |
| CN104597356A (en) * | 2015-01-30 | 2015-05-06 | 广东美的厨房电器制造有限公司 | Cookware detection method and device used for cooking utensil |
-
2015
- 2015-12-24 CN CN201510978832.5A patent/CN105485734B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201021818Y (en) * | 2007-03-01 | 2008-02-13 | 东莞市前锋电子有限公司 | Circuit device for detecting cookware of induction cooker |
| CN101909375A (en) * | 2009-06-08 | 2010-12-08 | 深圳市鑫汇科科技有限公司 | High-power electromagnetic oven circuit based on SoC (System On Chip) chip |
| CN201532446U (en) * | 2009-07-09 | 2010-07-21 | 山东艾诺仪器有限公司 | A battery internal resistance testing device |
| CN102905411A (en) * | 2012-10-17 | 2013-01-30 | 美的集团股份有限公司 | Control circuit for cookware material judgment and method thereof |
| CN104214804A (en) * | 2014-09-15 | 2014-12-17 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and cookware detecting method thereof |
| CN104597356A (en) * | 2015-01-30 | 2015-05-06 | 广东美的厨房电器制造有限公司 | Cookware detection method and device used for cooking utensil |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870616A (en) * | 2017-12-05 | 2019-06-11 | 佛山市顺德区美的电热电器制造有限公司 | Judgment method for the type of peak value circuit, control circuit, cooking utensils and pots |
| CN109870616B (en) * | 2017-12-05 | 2021-04-27 | 佛山市顺德区美的电热电器制造有限公司 | Judgment method for the type of peak value circuit, control circuit, cooking utensils and pots |
| CN111214099A (en) * | 2019-10-23 | 2020-06-02 | 浙江苏泊尔家电制造有限公司 | Cooking utensil |
| CN112859647A (en) * | 2019-11-27 | 2021-05-28 | 佛山市顺德区美的电热电器制造有限公司 | Cooking curve adjusting method and device, household appliance and storage medium |
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| CN105485734B (en) | 2018-02-09 |
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Effective date of registration: 20190904 Address after: 315806 No. 26 Dayao Yongjiang South Road, Beilun District, Ningbo City, Zhejiang Province (Ningbo Deye Frequency Conversion Technology Co., Ltd.) Patentee after: Ningbo Deye Inverter Technology Co., Ltd. Address before: 315806 No. 18 Huapu Road, Beilun District, Ningbo City, Zhejiang Province Patentee before: NINGBO DEGAO SOFTWARE TECHNOLOGY CO., LTD. |
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