CN206411187U - A kind of low power consumption current signal pickup assembly - Google Patents
A kind of low power consumption current signal pickup assembly Download PDFInfo
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- CN206411187U CN206411187U CN201720046321.4U CN201720046321U CN206411187U CN 206411187 U CN206411187 U CN 206411187U CN 201720046321 U CN201720046321 U CN 201720046321U CN 206411187 U CN206411187 U CN 206411187U
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- resistance
- operational amplifier
- power consumption
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- current signal
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Abstract
A kind of low power consumption current signal pickup assembly, a kind of low power consumption current signal pickup assembly, it is characterized in that, including current transformer, operational amplification circuit, voltage follower circuit, variation is into unipolar signal circuit, clamp circuit, resistance R4, resistance R6, resistance R5, microcontroller and in the order attention connection, operational amplification circuit includes the first operational amplifier, resistance R1, electric capacity C1, first power supply and second source, two output ends of current transformer are connected with the positive input terminal and anti-input of the first operational amplifier respectively, positive input terminal is connected to ground, resistance R1 and electric capacity C1 are connected in parallel between the output end of anti-input and the first operational amplifier, first power supply is connected with the positive-negative power end of the first operational amplifier respectively with second source.The beneficial effects of the utility model are：The current signal collection device power that the utility model is provided is low, and loss is small, and susceptibility is high.
Description
Technical field
The utility model is related to signal acquisition field, more particularly to a kind of low power consumption current signal pickup assembly.
Background technology
With the fast development of electronic information technology, in many enterprises related to electronic information technology, for alternating current
The collection of electric current be a critically important job, whether be in safe current by what the collection to electric current obtained current flow
Or whether electric current is required excursion, and make corresponding actions to adjust the work of whole circuit according to real-time current
Make state, so being badly in need of a kind of current signal collection device of low power consumption.
Utility model content
The utility model solve technical problem be how to realize low-loss current signal collection there is provided one kind it is simple in construction
Low power consumption current signal pickup assembly.
The utility model solves above-mentioned technical problem by following technological means：
A kind of low power consumption current signal pickup assembly, it is characterised in that including current transformer, operational amplification circuit, electricity
Pressure follows circuit, variation into unipolar signal circuit, clamp circuit, resistance R4, resistance R6, resistance R5, microcontroller,
The current transformer, operational amplification circuit, resistance R4, voltage follower circuit, resistance R6, variation are electric into unipolar signal
Road, resistance R5, clamp circuit, the input of microcontroller are connected one by one, and the operational amplification circuit includes the first operation amplifier
Device, resistance R1, electric capacity C1, the first power supply and second source, two output ends of current transformer respectively with the first operation amplifier
The positive input terminal of device and the connection of anti-input, the positive input terminal are connected to ground, and the resistance R1 and electric capacity C1 are connected in parallel on reverse pumping
Enter between end and the output end of the first operational amplifier, first power supply and second source respectively with the first operational amplifier
Positive-negative power end is connected；
The variation includes the 3rd operational amplifier, resistance R3, the 3rd power supply, described the into unipolar signal circuit
Three power supplys are connected by resistance R3 with the positive input terminal of the 3rd operational amplifier, the negative input end of the 3rd operational amplifier and output
End is directly connected to, and positive-negative power end is connected with the first power supply and second source respectively.
Optimization, the voltage follower circuit includes the second operational amplifier, resistance R2, resistance R7, second computing
The positive input terminal of amplifier is connected to ground by resistance R7, and negative input end is connected by resistance R2 with output end, positive-negative power end
Vacantly.
Optimization, the clamp circuit includes diode D1, diode D2, the diode D1 input and resistance R5
Connection, output end is connected with the 3rd power supply, and the output end of the diode D2 is connected with diode D1 input, input
It is connected to ground, the two ends of the diode are parallel with electric capacity C2, the input of the diode D1 and the input of microcontroller
Connection.
Optimization, the model TLC2274 of first operational amplifier and the 3rd operational amplifier.
Optimization, the model TLC2274 of second operational amplifier.
Optimization, the current range of the output end of the current transformer is -100mA-+100mA.
Optimization, first power supply is+12V, and the second source is -12V.
Optimization, the 3rd power supply is 3.3V.
Optimization, the model MMSD4148T1G of the diode D1 and diode D2.
Optimization, the voltage range of the input of the diode D1 is 0-3.3V.
The beneficial effects of the utility model are：The current signal collection device power that the utility model is provided is low, and loss is small,
And susceptibility is high.
Brief description of the drawings
Fig. 1 is the utility model circuit diagram.
Embodiment
Below in conjunction with the accompanying drawings, the utility model is described further.
As shown in figure 1, a kind of low power consumption current signal pickup assembly, including current transformer, operational amplification circuit, voltage
Circuit, variation are followed into unipolar signal circuit, clamp circuit, resistance R4, resistance R6, resistance R5, microcontroller, institute
Current transformer, operational amplification circuit, resistance R4, voltage follower circuit, resistance R6, variation are stated into unipolar signal electricity
Road, resistance R5, clamp circuit, the input of microcontroller are connected one by one, and the operational amplification circuit includes the first operation amplifier
Device, resistance R1, electric capacity C1, the first power supply and second source, first power supply are+12V, and the second source is -12V.Electricity
Two output ends of current transformer are connected with the positive input terminal and anti-input of the first operational amplifier respectively, the positive input terminal
It is connected to ground, the resistance R1 and electric capacity C1 are connected in parallel between the output end of anti-input and the first operational amplifier, described
One power supply is connected with the positive-negative power end of the first operational amplifier respectively with second source.The circuit realiration electric current turns voltage, and
And realize that temperature-compensating is fed back.Wherein resistance R4 resistances are 10K, and resistance R6 resistances are 30K, and resistance R5 resistances are 10K.
The variation includes the 3rd operational amplifier, resistance R3, the 3rd power supply, described the into unipolar signal circuit
Three power supplys are 3.3V.3rd power supply is connected by resistance R3 with the positive input terminal of the 3rd operational amplifier, and the 3rd computing is put
The negative input end of big device is directly connected to output end, and positive-negative power end is connected with the first power supply and second source respectively.Wherein, it is electric
The resistance for hindering R1 is 2K, and electric capacity C1 is 0.22uF.The bipolar voltage signal of scaled amplitude is become and turns to monopole
Property voltage signal.
The voltage follower circuit includes the second operational amplifier, resistance R2, resistance R7, second operational amplifier
Positive input terminal is connected to ground by resistance R7, and negative input end is connected by resistance R2 with output end, and positive-negative power end is hanging.Wherein
Resistance R2 resistance is 25K, and resistance R7 resistance is 30K.
The clamp circuit includes diode D1, diode D2, and the input of the diode D1 is connected with resistance R5,
Output end is connected with the 3rd power supply, and the output end of the diode D2 is connected with diode D1 input, and input connects with ground
Connect, the two ends of the diode are parallel with the input connection of electric capacity C2, the diode D1 input and microcontroller.Its
In, electric capacity C2 is 10nF.Ensure to be input to the analog quantity no more than 3.3V of microprocessor, in order to avoid damage chip.
Optimization, the model TLC2274 of first operational amplifier and the 3rd operational amplifier.
Optimization, the model TLC2274 of second operational amplifier.
Optimization, the current range of the output end of the current transformer is -100mA-+100mA.
Optimization, the model MMSD4148T1G of the diode D1 and diode D2.
Optimization, the voltage range of the input of the diode D1 is 0-3.3V.
The device first passes through current transformer and high current is converted into low current, then realizes electric current by operational amplification circuit
The second operational amplifier being converted into voltage form detection, voltage follower circuit is the operational amplifier that high impedance is inputted, electricity
Pressure shifts into unipolar signal circuit realiration output single-pole signal, ensures to be input to microprocessor finally by clamp circuit
Analog quantity is not more than 3.3V.
Those skilled in the art may be used also it is to be understood that protection scheme of the present utility model is not limited only to the above embodiments
To carry out various permutation and combination and conversion on the basis of above-described embodiment, on the premise of without prejudice to the utility model spirit,
The various conversion that the utility model is carried out are all fallen within protection domain of the present utility model.
Claims (10)
1. a kind of low power consumption current signal pickup assembly, it is characterised in that including current transformer, operational amplification circuit, voltage
Circuit, variation are followed into unipolar signal circuit, clamp circuit, resistance R4, resistance R6, resistance R5, microcontroller, it is described
Current transformer, operational amplification circuit, resistance R4, voltage follower circuit, resistance R6, variation into unipolar signal circuit,
Resistance R5, clamp circuit, the input of microcontroller are connected one by one, the operational amplification circuit include the first operational amplifier,
Resistance R1, electric capacity C1, the first power supply and second source, two output ends of current transformer respectively with the first operational amplifier
Positive input terminal and the connection of anti-input, the positive input terminal are connected to ground, and the resistance R1 and electric capacity C1 are connected in parallel on anti-input
Between the output end of the first operational amplifier, first power supply is positive and negative with the first operational amplifier respectively with second source
Power end is connected；
The variation includes the 3rd operational amplifier, resistance R3, the 3rd power supply, the 3rd electricity into unipolar signal circuit
Source is connected by resistance R3 with the positive input terminal of the 3rd operational amplifier, and the negative input end and output end of the 3rd operational amplifier are straight
Connect in succession, positive-negative power end is connected with the first power supply and second source respectively.
2. low power consumption current signal pickup assembly according to claim 1, it is characterised in that the voltage follower circuit bag
The second operational amplifier, resistance R2, resistance R7 are included, the positive input terminal of second operational amplifier is connected by resistance R7 with ground
Connect, negative input end is connected by resistance R2 with output end, positive-negative power end is hanging.
3. low power consumption current signal pickup assembly according to claim 1 or 2, it is characterised in that the clamp circuit bag
Diode D1, diode D2 are included, the input of the diode D1 is connected with resistance R5, and output end is connected with the 3rd power supply, institute
The output end for stating diode D2 is connected with diode D1 input, and input is connected to ground, and the two ends of the diode are in parallel
There are electric capacity C2, the diode D1 input and the input of microcontroller to connect.
4. low power consumption current signal pickup assembly according to claim 1, it is characterised in that first operational amplifier
With the model TLC2274 of the 3rd operational amplifier.
5. low power consumption current signal pickup assembly according to claim 2, it is characterised in that second operational amplifier
Model TLC2274.
6. low power consumption current signal pickup assembly according to claim 1, it is characterised in that the current transformer it is defeated
The current range for going out end is -100mA-+100mA.
7. low power consumption current signal pickup assembly according to claim 1, it is characterised in that first power supply for+
12V, the second source is -12V.
8. low power consumption current signal pickup assembly according to claim 1, it is characterised in that the 3rd power supply is
3.3V。
9. low power consumption current signal pickup assembly according to claim 3, it is characterised in that the diode D1 and two poles
Pipe D2 model MMSD4148T1G.
10. low power consumption current signal pickup assembly according to claim 3, it is characterised in that the diode D1's is defeated
The voltage range for entering end is 0-3.3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720046321.4U CN206411187U (en) | 2017-01-16 | 2017-01-16 | A kind of low power consumption current signal pickup assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720046321.4U CN206411187U (en) | 2017-01-16 | 2017-01-16 | A kind of low power consumption current signal pickup assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206411187U true CN206411187U (en) | 2017-08-15 |
Family
ID=59555232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720046321.4U Expired - Fee Related CN206411187U (en) | 2017-01-16 | 2017-01-16 | A kind of low power consumption current signal pickup assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206411187U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082587A (en) * | 2019-04-23 | 2019-08-02 | 深圳供电局有限公司 | Detection circuit and multiple-limb identification device |
| CN110470388A (en) * | 2019-08-22 | 2019-11-19 | 合肥利弗莫尔仪器科技有限公司 | A kind of high speed acquisition circuit quasi real time monitored for pulse laser mean power |
| CN115277326A (en) * | 2022-07-27 | 2022-11-01 | 贵州大学 | Signal generator with offset boosting and amplitude modulation functions |
-
2017
- 2017-01-16 CN CN201720046321.4U patent/CN206411187U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082587A (en) * | 2019-04-23 | 2019-08-02 | 深圳供电局有限公司 | Detection circuit and multiple-limb identification device |
| CN110470388A (en) * | 2019-08-22 | 2019-11-19 | 合肥利弗莫尔仪器科技有限公司 | A kind of high speed acquisition circuit quasi real time monitored for pulse laser mean power |
| CN115277326A (en) * | 2022-07-27 | 2022-11-01 | 贵州大学 | Signal generator with offset boosting and amplitude modulation functions |
| CN115277326B (en) * | 2022-07-27 | 2023-05-05 | 贵州大学 | Signal generator with offset boosting and amplitude modulation functions |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170815 Termination date: 20210116 |
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| CF01 | Termination of patent right due to non-payment of annual fee |