CN202421476U - Power supply voltage detection circuit applied to bean juice maker - Google Patents
Power supply voltage detection circuit applied to bean juice maker Download PDFInfo
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- CN202421476U CN202421476U CN 201120476435 CN201120476435U CN202421476U CN 202421476 U CN202421476 U CN 202421476U CN 201120476435 CN201120476435 CN 201120476435 CN 201120476435 U CN201120476435 U CN 201120476435U CN 202421476 U CN202421476 U CN 202421476U
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- circuit
- voltage
- voltage detection
- making machine
- bean milk
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 235000010627 Phaseolus vulgaris Nutrition 0.000 title abstract 4
- 244000046052 Phaseolus vulgaris Species 0.000 title abstract 4
- 235000011389 fruit/vegetable juice Nutrition 0.000 title abstract 4
- 235000010469 Glycine max Nutrition 0.000 claims description 32
- 244000068988 Glycine max Species 0.000 claims description 32
- 239000008267 milk Substances 0.000 claims description 32
- 210000004080 milk Anatomy 0.000 claims description 32
- 235000013336 milk Nutrition 0.000 claims description 32
- 238000005070 sampling Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 235000021251 pulses Nutrition 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model discloses a power supply voltage detection circuit applied to a bean juice maker. The power supply voltage detection circuit comprises a voltage division circuit, an isolating circuit, a sampling circuit and an electric control part, wherein the input end of the isolating circuit is connected with the voltage division output end of the voltage division circuit so as to obtain a voltage subjected to voltage division, the output end of the isolating circuit is connected with the sampling circuit, and the output end of the sampling circuit is connected with the electronic control part. The power supply voltage detection circuit disclosed by the utility model can detect an input power supply voltage, and avoid the occurrence of a situation that the bean juice maker is running under the condition of undervoltage, thereby affecting the normal operation of the bean juice maker.
Description
Technical field
The utility model relates to a kind of testing circuit, especially a kind of voltage detection circuit that is applied on the soy bean milk making machine.
Background technology
Existing electric equipment, like soy bean milk making machine, under power utilization environment, because the difference of line voltage condition, and appear at the situation about moving under the normal voltage that is below or above, so that influence the operate as normal and the serviceable life of electric equipment.Therefore, voltage detection circuit need be set, to prevent out an above-mentioned situation.The sample mode of existing employing transformer output needs the process through voltage commutation, filtering, dividing potential drop and AD sampling, though this kind scheme simplicity of design, debugging is convenient, but design cost is higher, and precision is not high.
The utility model content
The fundamental purpose of the utility model is to the defective that above-mentioned prior art exists a kind of voltage detection circuit that is applied on the soy bean milk making machine to be provided, and this voltage detection circuit design cost is low and precision is high.
For realizing above-mentioned purpose; A kind of voltage detection circuit that is applied on the soy bean milk making machine of the utility model comprises bleeder circuit, buffer circuit, sample circuit and electric-controlled parts; The dividing potential drop output terminal that the input end of said buffer circuit connects said bleeder circuit obtains voltage after partial; The output terminal of said buffer circuit connects described sample circuit, and the output terminal of said sample circuit connects described electric-controlled parts.
Wherein, described bleeder circuit is a resistor voltage divider circuit.
Wherein, said resistor voltage divider circuit is the multi-stage cascade resistor voltage divider circuit.
Wherein, having one in the said resistor voltage divider circuit at least is variable resistor.
Wherein, said buffer circuit comprises optocoupler, and the input end of this optocoupler connects the dividing potential drop output terminal of said bleeder circuit.
Wherein, described sample circuit comprises the capacitance-resistance voltage filter sample circuit that is connected in parallel on said optocoupler output terminal.
Wherein, said sample circuit also comprises pull-up resistor and the current-limiting resistance that is connected with the output terminal of said optocoupler.
Wherein, this voltage detection circuit also comprises holding circuit, and said holding circuit comprises backward dioded, this backward dioded parallel connection or be series at the input end of said optocoupler.
Wherein, said bleeder circuit has several resistance, and these several resistance have at least one variable resistor, and the input end of said optocoupler is connected in parallel in said variable-resistance two ends.
From the above mentioned, the utility model makes strong, weak electricity separate through the light-coupled isolation power supply; Guarantee the safe in utilization of soy bean milk making machine, utilize bleeder circuit that supply voltage is carried out dividing potential drop, improve the precision of dividing potential drop; Make that variable-resistance output voltage is less, when supply voltage changed, variable-resistance change in voltage was less; Improved the precision that supply voltage is detected, avoided soy bean milk making machine, influenced the operate as normal of soy bean milk making machine in use because of detecting the alarm failure that error causes; And the utility model design cost is low, is convenient to be widely used.
Description of drawings
Fig. 1 is the circuit structure diagram of the utility model.
Embodiment
For specifying technology contents, structural attitude and the purpose of being reached and the effect of the utility model, will combine embodiment and conjunction with figs. to know clearly below and give explanation.
Please refer to Fig. 1, in the first embodiment, a kind of voltage detection circuit that is applied on the soy bean milk making machine of the utility model comprises the bleeder circuit that an end is connected with supply voltage Vin one end; This bleeder circuit is the multi-stage cascade resistor voltage divider circuit, comprises several resistance, and these several resistance can connect through the mode of parallel connection, series connection or series-parallel connection; To realize dividing potential drop, here, resistor voltage divider circuit comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5 and a variable resistor RT; One end of resistance R 1 connects supply voltage Vin; The other end links to each other with an end of resistance R 2 and is connected to an end of resistance R 3, the other end ground connection of resistance R 2, and the other end of resistance R 3 links to each other with an end of resistance R 4 and is connected to an end of resistance R 5; The other end ground connection of resistance R 4, the other end of resistance R 5 is through resistance R T ground connection.In the utility model, bleeder circuit also can be multi-stage cascade inductance bleeder circuit, capacitance partial pressure circuit, or other can realize the circuit of dividing potential drop, and embodiment is not limited thereto.
A kind of voltage detection circuit that is applied on the soy bean milk making machine of the utility model also comprises buffer circuit and holding circuit; The dividing potential drop output terminal that the input end of this buffer circuit connects said bleeder circuit obtains voltage after partial; The output terminal of this buffer circuit connects sample circuit, and the output terminal of this sample circuit connects electric-controlled parts.This buffer circuit comprises optocoupler U1, and this optocoupler U1 comprises light emitting diode D2, phototriode E, here, the input end of just very this buffer circuit of this light emitting diode D2, the current collection of this phototriode E is the output terminal of this buffer circuit very.Holding circuit comprises backward dioded D1; The light emitting diode D2 of this optocoupler U1 and backward dioded D1 are connected in the two ends of resistance R T respectively in parallel; The positive pole of backward dioded D1 connects the supply voltage Vin other end, and the negative pole of light emitting diode D2 connects the supply voltage Vin other end, here; Backward dioded D1 also can be connected in series with light emitting diode D2, and the reverse voltage of avoiding importing punctures light emitting diode D2.The grounded emitter of the phototriode E of optocoupler U1; Sample circuit comprises pull-up resistor R7, current-limiting resistance R6; The collector of optocoupler U1 meets power supply VCC through pull-up resistor R7, and simultaneously collector series connection current-limiting resistance R6 is to electric-controlled parts, the beginning of this electric-controlled parts may command soy bean milk making machine with stop.
The principle of work of the utility model is at first to set alarm voltage V
0, this alarm voltage V
0Minimum voltage during for the soy bean milk making machine operate as normal, alarm voltage V
0After the process dividing potential drop of resistor voltage divider circuit, the output voltage of resistance R T is made as v
0, this output voltage v
0For making the critical value of light emitting diode D2 work, that is, and as supply voltage Vin>=V
0The time, the voltage v of resistance R T
RT>=v
0The time, light emitting diode D2 starts working, phototriode E conducting, and the voltage that this moment, electric-controlled parts received is 0, is regarded as low level, works as v
RT＜v
0The time, light emitting diode D2 can not work, and phototriode E breaks off, and the voltage that this moment, electric-controlled parts received is regarded as high level greater than 0.Here, resistance R T is a variable resistor, has the function of fine setting, when error or other factors because of components and parts make that the voltage of resistance R T is not v
0The time, can make that the output voltage after the resistance R T dividing potential drop is v through regulating the resistance of resistance R T
0, promptly influencing the critical voltage of light emitting diode D2 works, this regulative mode is not only convenient and swift, and has improved the precision that detects.
In the process of work, as Vin>=V
0The time, the voltage v of resistance R T
RT>=v
0, light emitting diode D2 starts working, phototriode E conducting, and electric-controlled parts receives low level, and establishing the time that electric-controlled parts receives low-level pulse width is t
1, as Vin＜V
0The time, the voltage v of resistance R T
RT＜v
0, light emitting diode D2 can not work, and phototriode E breaks off, and electric-controlled parts receives high level, and establishing the time that electric-controlled parts receives the high level pulsewidth is t
2, Vin is output as alternating current because of supply voltage, and electric-controlled parts alternately receives low, high level, and the time is respectively t
1, t
2, at this moment, soy bean milk making machine is worked under normal voltage.Time t＞the t of the high level that receives when electric-controlled parts
2The time, then the WV of soy bean milk making machine is lower than alarm voltage V
0, electric-controlled parts control soy bean milk making machine quits work, and avoids soy bean milk making machine under the state of under-voltage, to work, and performance descends, and problems such as damage occur.
In addition, a kind of voltage detection circuit that is applied on the soy bean milk making machine of the utility model also can be realized the zero passage detection function, and its principle of work is; Set zero passage voltage V1; The resistance of adjustment resistance R T makes zero passage voltage V1 after the process dividing potential drop of resistor voltage divider circuit, and the voltage of resistance R T is v
1, before soy bean milk making machine was started working, electric component control voltage detection circuit carried out zero passage detection, that is, when Vin>=V1, the voltage v of resistance R T
RT>=v
1, light emitting diode D2 starts working, phototriode E conducting, and electric-controlled parts receives the low level pulsewidth time and is made as t
3, when Vin＜V1, the voltage v of resistance R T
RT＜v
1, light emitting diode D2 can not work, and phototriode E breaks off, and the pulsewidth time that electric-controlled parts receives high level is made as t
4, when electric-controlled parts alternately receives low, high level, and the time is respectively t
3, t
4The time, the supply voltage zero passage, soy bean milk making machine can begin startup work.
Compare with first embodiment; In second embodiment, the utility model also comprises capacitance-resistance voltage filter sample circuit, and this filtering sampling circuit comprises resistance R 8 and capacitor C 1; The positive pole of capacitor C 1 connects the collector of phototriode E; Its minus earth, an end of resistance R 8 is connected other end ground connection with capacitor C 1 positive pole.The utility model voltage detection circuit adopts capacitance-resistance voltage filter sample circuit, can make the waveform of voltage detection circuit output more level and smooth, is convenient to the electric-controlled parts sampling.
In sum, a kind of voltage detection circuit that is applied on the soy bean milk making machine of the utility model passes through optocoupler U1 insulating power supply, makes strong, weak electricity separate; Guarantee the safe in utilization of soy bean milk making machine, utilize the multi-stage cascade resistor voltage divider circuit that supply voltage Vin is carried out dividing potential drop, improve the precision of dividing potential drop; Make that the voltage of dividing potential drop output terminal output of resistance R T is less; When supply voltage Vin changed, the change in voltage of resistance R T was less, had improved the precision that supply voltage Vin is detected; Avoided soy bean milk making machine in use because of detecting the alarm failure that error causes; Influence the operate as normal of soy bean milk making machine, and the utility model voltage detection circuit design cost is low, is convenient to be widely used.
The above disclosed preferred embodiment that is merely the utility model can not limit the interest field of the utility model certainly with this, so according to the equivalent variations that the utility model claim is done, still belong to the scope that the utility model is contained.
Claims (9)
1. voltage detection circuit that is applied on the soy bean milk making machine; It is characterized in that: comprise bleeder circuit, buffer circuit, sample circuit and electric-controlled parts; The dividing potential drop output terminal that the input end of said buffer circuit connects said bleeder circuit obtains voltage after partial; The output terminal of said buffer circuit connects described sample circuit, and the output terminal of said sample circuit connects described electric-controlled parts.
2. a kind of voltage detection circuit that is applied on the soy bean milk making machine according to claim 1 is characterized in that described bleeder circuit is a resistor voltage divider circuit.
3. a kind of voltage detection circuit that is applied on the soy bean milk making machine according to claim 2 is characterized in that said resistor voltage divider circuit is the multi-stage cascade resistor voltage divider circuit.
4. according to claim 2 or 3 described a kind of voltage detection circuits that are applied on the soy bean milk making machine, it is characterized in that having at least one to be variable resistor in the said resistor voltage divider circuit.
5. a kind of voltage detection circuit that is applied on the soy bean milk making machine according to claim 1 is characterized in that said buffer circuit comprises optocoupler, and the input end of this optocoupler connects the dividing potential drop output terminal of said bleeder circuit.
6. a kind of voltage detection circuit that is applied on the soy bean milk making machine according to claim 5 is characterized in that, described sample circuit comprises the capacitance-resistance voltage filter sample circuit that is connected in parallel on said optocoupler output terminal.
7. a kind of voltage detection circuit that is applied on the soy bean milk making machine according to claim 6 is characterized in that said sample circuit also comprises pull-up resistor and the current-limiting resistance that is connected with the output terminal of said optocoupler.
8. according to each described a kind of voltage detection circuit that is applied on the soy bean milk making machine in the claim 5 to 7; It is characterized in that; This voltage detection circuit also comprises holding circuit; Said holding circuit comprises backward dioded, this backward dioded parallel connection or be series at the input end of said optocoupler.
9. a kind of voltage detection circuit that is applied on the soy bean milk making machine according to claim 5; It is characterized in that; Said bleeder circuit has several resistance, and these several resistance have at least one variable resistor, and the input end of said optocoupler is connected in parallel in said variable-resistance two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120476435 CN202421476U (en) | 2011-11-25 | 2011-11-25 | Power supply voltage detection circuit applied to bean juice maker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120476435 CN202421476U (en) | 2011-11-25 | 2011-11-25 | Power supply voltage detection circuit applied to bean juice maker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202421476U true CN202421476U (en) | 2012-09-05 |
Family
ID=46746228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120476435 Expired - Fee Related CN202421476U (en) | 2011-11-25 | 2011-11-25 | Power supply voltage detection circuit applied to bean juice maker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202421476U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869881A (en) * | 2019-03-14 | 2019-06-11 | 苏州旋凌科技有限公司 | It is a kind of for judging the method and circuit of the operating status of compressor |
| CN112834810A (en) * | 2021-01-04 | 2021-05-25 | 基合半导体（宁波）有限公司 | Commercial power voltage detection circuit and detection method applied to flyback isolation power supply |
-
2011
- 2011-11-25 CN CN 201120476435 patent/CN202421476U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869881A (en) * | 2019-03-14 | 2019-06-11 | 苏州旋凌科技有限公司 | It is a kind of for judging the method and circuit of the operating status of compressor |
| CN112834810A (en) * | 2021-01-04 | 2021-05-25 | 基合半导体（宁波）有限公司 | Commercial power voltage detection circuit and detection method applied to flyback isolation power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Huaiyin District of Ji'nan City, Shandong Province, 250118 US 999 miles Patentee after: Joyoung Company Limited Address before: Xinsha Road, Huaiyin District of Ji'nan city of Shandong Province, No. 12 250118 Patentee before: Joyoung Company Limited |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20201125 |