CN205027808U - Current sensor - Google Patents
Current sensor Download PDFInfo
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- CN205027808U CN205027808U CN201520786885.2U CN201520786885U CN205027808U CN 205027808 U CN205027808 U CN 205027808U CN 201520786885 U CN201520786885 U CN 201520786885U CN 205027808 U CN205027808 U CN 205027808U
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Abstract
The utility model discloses a current sensor, it includes signal generating circuit, signal amplification circuit, magnetic cores structure, direct current detection circuitry, a signal processing circuit, signal demagnetization circuit, the other ware of electricity magnetic domain, and a power amplification circuit, signal output circuit, signal generating circuit passes through signal amplification circuit and links to each other with magnetic cores structure, magnetic cores structure respectively with direct current detection circuitry, and a power amplification circuit, signal output circuit links to each other, direct current detection circuitry links to each other through the other ware of processing circuit or signal demagnetization circuit and electric magnetic domain respectively, the other ware of electricity magnetic domain links to each other with power amplification circuit. The utility model discloses can have obvious detectability to the current signal, and avoid the interference in magnetic field, system error and linearity error when having reduced output have improved measuring precision and reliability.
Description
Technical field
The utility model relates to a kind of sensor, particularly relates to a kind of current sensor.
Background technology
Current sensor is a kind of pick-up unit, the information of tested electric current can be experienced, and can will detect the information experienced, the information being for conversion into electric signal or other desired forms meeting certain standard needs according to certain rules exports, to meet the requirements such as the transmission of information, process, storage, display, record and control.
Current sensor also claims Magnetic Sensor, at household electrical appliance, intelligent grid, electric motor car, wind-power electricity generation etc., can all use a lot of Magnetic Sensor in our life, for example, computer hard disc, compass, household electrical appliance etc.Existing current sensor can not effectively process signal, poor reliability.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of current sensor, and it can process signal effectively, and improves the reliability of current detecting.
The utility model solves above-mentioned technical matters by following technical proposals: a kind of current sensor, it is characterized in that, it comprises signal generating circuit, signal amplification circuit, core structure, DC detection circuit, signal processing circuit, signal demagnetization circuit, electromagnetism difference device, power amplification circuit, signal output apparatus, signal generating circuit is connected with core structure by signal amplification circuit, core structure respectively with DC detection circuit, power amplification circuit, signal output apparatus is connected, DC detection circuit is distinguished device respectively by signal processing circuit or signal demagnetization circuit with electromagnetism and is connected, electromagnetism difference device is connected with power amplification circuit.
Preferably, what described signal amplification circuit adopted is differential amplifier circuit.
Preferably, what described power amplification circuit adopted is class AB OTL power amplifier.
Preferably, described power amplification circuit comprises the first resistance, slide resistor, 3rd resistance, collector resistance, emitter resistance, output resistance, first diode, second diode, first electric capacity, first electric capacity, first electric capacity, emitter capacity, first triode, second triode, 3rd triode, first resistance one end ground connection, the other end is connected with the first electric capacity, another termination input voltage of first electric capacity, slide resistor one termination first resistance, another termination of slide resistor the 3rd electric capacity, another termination the 3rd resistance of the 3rd electric capacity, another termination input power of 3rd resistance, the collector of the first triode connects input power, the base stage of the first triode connects collector resistance, the emitter of the first triode connects the collector of the second triode, another termination the 3rd resistance of collector resistance, the base stage of forward termination first triode of the first diode, the forward end of reverse termination second diode of the first diode, the base stage of reverse termination second triode of the second diode, the collector of the second triode connects one end of the second electric capacity, the grounded emitter of the second triode, the other end of the second electric capacity is by output resistance ground connection, the collector of the 3rd triode connects the backward end of the second diode, the base stage of the 3rd triode connects the first electric capacity, emitter resistance is in parallel with emitter capacity, the emitter of one termination the 3rd triode of emitter resistance, the other end ground connection of emitter resistance.
Preferably, described signal generating circuit comprises the 21 resistance, 22 resistance, 23 resistance, 24 resistance, 25 resistance, variable resistor, 21 electric capacity, 4th triode, 5th triode, 6th triode, 21 electric capacity be connected with the base stage of the first triode and with the 24 resistance, 25 resistor coupled in parallel, the emitter of the 24 resistance and the 4th triode, the emitter of the 5th triode connects, 21 resistance and variable resistor, 21 capacitances in series, the collector of the 22 resistance and the 4th triode, the base stage of the 5th triode connects, the collector of the 23 resistance and the 5th triode, the base stage of the 6th triode connects, 25 resistance is connected with the collector of the 6th triode.
Preferably, described DC detection circuit comprises the first diode, the second diode, the 31 electric capacity, the 32 electric capacity, the 31 resistance, the 32 resistance, the negative pole of the first diode by the 31 capacity earth and with the 31 resistant series; The positive pole of the second diode by the 4th capacity earth and with the 32 resistant series, the positive pole of the first diode is connected with the negative pole of the second diode, and the 31 resistance is connected with the 32 resistance.
Preferably, described signal demagnetization circuit comprises the first inductance, the second inductance, switch, the 41 resistance, the 42 resistance, the 43 resistance, the 7th triode, the first chip, first inductance and the second inductance in parallel, second inductance is connected with the collector of the 7th triode, 41 resistance is connected with switch and is connected with the emitter of the 7th triode, 43 resistance, the first chip are all connected with the 42 resistance, and the 42 resistance is connected with the base stage of the 7th triode.
Preferably, described signal output apparatus comprises the 51 resistance, the 52 resistance, the 53 resistance, the 54 resistance, amplifier, the 51 electric capacity, 52 resistance and the 51 resistor coupled in parallel and with the 53 resistant series, 51 electric capacity and the 54 resistant series, 51 resistance, the 52 resistance, the 53 resistance are all connected with the input positive pole of amplifier, and the 51 electric capacity, the 54 resistance are all connected with the input negative pole of amplifier.
Positive progressive effect of the present utility model is: the utility model can have obvious detectability to current signal, and avoids the interference in magnetic field, and systematic error when reducing output and linear error, improve accuracy of detection and reliability.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present utility model.
Fig. 2 is the circuit diagram of power amplification circuit in the utility model.
Fig. 3 is the circuit diagram of signal generating circuit in the utility model.
Fig. 4 is the circuit diagram of DC detection circuit in the utility model.
Fig. 5 is the circuit diagram of signal demagnetization circuit in the utility model.
Fig. 6 is the circuit diagram of signal output apparatus in the utility model.
Embodiment
The utility model preferred embodiment is provided, to describe the technical solution of the utility model in detail below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model current sensor comprises signal generating circuit 1, signal amplification circuit 2, core structure 3, DC detection circuit 4, signal processing circuit 5, signal demagnetization circuit 6, electromagnetism difference device 7, power amplification circuit 8, signal output apparatus 9, signal generating circuit 1 is connected with core structure 3 by signal amplification circuit 2, core structure 3 respectively with DC detection circuit 4, power amplification circuit 8, signal output apparatus 9 is connected, DC detection circuit 4 is distinguished device 7 respectively by signal processing circuit 5 or signal demagnetization circuit 6 with electromagnetism and is connected, electromagnetism difference device 7 is connected with power amplification circuit 8.
Electric current expands its characteristic by signal amplification circuit, then enter core structure and make current strap magnetic, by DC detection circuit asymmetric magnetization signal be converted to detectable voltage signals and classify, excessive for needs magnetized signal is sent into signal demagnetization circuit and carries out demagnetization process, and export the oscillator signal that demagnetizes accordingly, normal signal is sent into signal processing circuit by DC detection circuit, it is made to export corresponding current processing signal, then all signals carry out arranging and are unified into identical current signal by electromagnetism difference device sends into power amplification circuit, power amplification circuit is transmitted after amplifying gained signal to be made it be converted to electric current into core structure and outputs to output.
What described signal amplification circuit 2 adopted is differential amplifier circuit, and it can amplify differential mode and export the output of suppression common mode, reduces interference, improves the stability of signal.What power amplification circuit can adopt is class AB OTL power amplifier.
As shown in Figure 2, described power amplification circuit comprises the first resistance R1, slide resistor R2, 3rd resistance R3, collector resistance RC3, emitter resistance Re, output resistance RL, first diode D1, second diode D2, first electric capacity C1, first electric capacity C2, first electric capacity C3, emitter capacity Ce, first triode T1, second triode T2, 3rd triode T3, first resistance R1 one end ground connection, the other end is connected with the first electric capacity C1, another termination input voltage Vi of the first electric capacity C1, slide resistor R2 mono-termination first resistance R1, another termination of slide resistor R2 the 3rd electric capacity C3, another termination the 3rd resistance R3 of the 3rd electric capacity C3, another termination input power+VCC of the 3rd resistance R3, the collector of the first triode T1 meets input power+VCC, the base stage of the first triode T1 meets collector resistance RC3, the emitter of the first triode T1 connects the collector of the second triode T2, another termination the 3rd resistance R3 of collector resistance RC3, the base stage of the forward termination first triode T1 of the first diode D1, the forward end of the reverse termination second diode D2 of the first diode D1, the base stage of the reverse termination second triode T2 of the second diode D2, the collector of the second triode T2 connects one end of the second electric capacity C2, the grounded emitter of the second triode T2, the other end of the second electric capacity C2 is by output resistance RL ground connection, the collector of the 3rd triode T3 connects the backward end of the second diode D2, the base stage of the 3rd triode T3 connects the first electric capacity, emitter resistance Re is in parallel with emitter capacity Ce, the emitter of one termination the 3rd triode T3 of emitter resistance Re, the other end ground connection of emitter resistance Re.
As shown in Figure 3, signal generating circuit comprises the 21 resistance R21, 22 resistance R22, 23 resistance R23, 24 resistance R24, 25 resistance R25, variable resistor VR1, 21 electric capacity C21, 4th triode Q4, 5th triode Q5, 6th triode Q6, 21 electric capacity C21 be connected with the base stage of the first triode Q1 and with the 24 resistance R24, 25 resistance R25 is in parallel, the emitter of the 24 resistance R24 and the 4th triode Q4, the emitter of the 5th triode Q5 connects, 21 resistance R21 and variable resistor VR1, 21 electric capacity C21 connects, the collector of the 22 resistance R22 and the 4th triode Q4, the base stage of the 5th triode Q5 connects, the collector of the 23 resistance R23 and the 5th triode Q5, the base stage of the 6th triode Q6 connects, 25 resistance R25 is connected with the collector of the 6th triode Q6.
As shown in Figure 4, DC detection circuit comprises the first diode D1, the second diode D2, the 31 electric capacity C31, the 32 electric capacity C32, the 31 resistance R31, the 32 resistance R32, the negative pole of the first diode D1 passes through the 31 electric capacity C31 ground connection and connects with the 31 resistance R31, by the 31 resistance R31 output detections voltage signal; The positive pole of the second diode D2 passes through the 4th electric capacity C4 ground connection and connects with the 32 resistance R32, by the 32 resistance R32 to output detections voltage signal, wherein, the positive pole of the first diode D1 is connected with the negative pole of the second diode D2, receives asymmetric magnetization signal; 31 resistance R31 is connected with the 32 resistance R32, output detections voltage signal.
As shown in Figure 5, signal demagnetization circuit comprises the first inductance L 1, second inductance L 2, K switch 1, 41 resistance R41, 42 resistance R42, 43 resistance R43, 7th triode Q7, first chip U1, first inductance L 1 is in parallel with the second inductance L 2, second inductance L 2 is connected with the collector of the 7th triode Q7, 41 resistance R41 connects with K switch 1 and is connected with the emitter of the 7th triode Q7, 43 resistance R43, first chip U1 is connected with the 42 resistance R42, 42 resistance R42 is connected with the base stage of the 7th triode Q7.The model of the first chip U2 can be AN5183K.
As shown in Figure 6, signal output apparatus comprises the 51 resistance R51, 52 resistance R52, 53 resistance R53, 54 resistance R54, amplifier U2, 51 electric capacity C51, 52 resistance R52 is in parallel with the 51 resistance R51 and connect with the 53 resistance R53, 51 electric capacity C51 connects with the 54 resistance R54, 51 resistance R51, 52 resistance R52, 53 resistance R53 is connected with the input positive pole of amplifier U2, 51 electric capacity C51, 54 resistance R54 is connected with the input negative pole of amplifier U2.
The utility model relies on differential amplifier circuit to improve the principle of work of signal stabilization: (1) is to the amplification of differential input signal: when difference mode signal Vid inputs (common-mode signal Vic=0), difference puts two input end signal equal and opposite in directions, polarity is contrary, i.e. Vi1=-Vi2=Vid/2, therefore the differential equal and opposite in direction to tube current increment, polarity is contrary, cause two output terminals voltage increment over the ground, i.e. differential output voltage Vod1, Vod2 equal and opposite in direction, polarity is contrary, now both-end output voltage Vo=Vod1-Vod2=2Vod1=Vod, visible, difference exoergic amplifies differential input signal effectively.(2) to the inhibiting effect of common mode input signal: as common-mode signal Vic input (difference mode signal Vid=0), difference puts two input end signal equal and opposite in directions, polarity is identical, i.e. Vi1=vI2=Vic, therefore the differential equal and opposite in direction to tube current increment, polarity are identical, cause two output terminals voltage increment over the ground, namely differential output voltage Voc1, Voc2 equal and opposite in direction, polarity are identical, now both-end output voltage Vo=Voc1-Voc2=0, visible, poor common mode input signal of being rivals in a contest has very strong rejection ability.
Above-described specific embodiment; the technical matters of solution of the present utility model, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. a current sensor, it is characterized in that, it comprises signal generating circuit, signal amplification circuit, core structure, DC detection circuit, signal processing circuit, signal demagnetization circuit, electromagnetism difference device, power amplification circuit, signal output apparatus, signal generating circuit is connected with core structure by signal amplification circuit, core structure respectively with DC detection circuit, power amplification circuit, signal output apparatus is connected, DC detection circuit is distinguished device respectively by signal processing circuit or signal demagnetization circuit with electromagnetism and is connected, electromagnetism difference device is connected with power amplification circuit.
2. current sensor as claimed in claim 1, is characterized in that, what described signal amplification circuit adopted is differential amplifier circuit.
3. current sensor as claimed in claim 2, is characterized in that, what described power amplification circuit adopted is class AB OTL power amplifier.
4. current sensor as claimed in claim 1, it is characterized in that, described power amplification circuit comprises the first resistance, slide resistor, 3rd resistance, collector resistance, emitter resistance, output resistance, first diode, second diode, first electric capacity, second electric capacity, 3rd electric capacity, emitter capacity, first triode, second triode, 3rd triode, first resistance one end ground connection, the other end is connected with the first electric capacity, another termination input voltage of first electric capacity, slide resistor one termination first resistance, another termination of slide resistor the 3rd electric capacity, another termination the 3rd resistance of the 3rd electric capacity, another termination input power of 3rd resistance, the collector of the first triode connects input power, the base stage of the first triode connects collector resistance, the emitter of the first triode connects the collector of the second triode, another termination the 3rd resistance of collector resistance, the base stage of forward termination first triode of the first diode, the forward end of reverse termination second diode of the first diode, the base stage of reverse termination second triode of the second diode, the collector of the second triode connects one end of the second electric capacity, the grounded emitter of the second triode, the other end of the second electric capacity is by output resistance ground connection, the collector of the 3rd triode connects the backward end of the second diode, the base stage of the 3rd triode connects the first electric capacity, emitter resistance is in parallel with emitter capacity, the emitter of one termination the 3rd triode of emitter resistance, the other end ground connection of emitter resistance.
5. current sensor as claimed in claim 1, it is characterized in that, described signal generating circuit comprises the 21 resistance, 22 resistance, 23 resistance, 24 resistance, 25 resistance, variable resistor, 21 electric capacity, 4th triode, 5th triode, 6th triode, 21 electric capacity be connected with the base stage of the first triode and with the 24 resistance, 25 resistor coupled in parallel, the emitter of the 24 resistance and the 4th triode, the emitter of the 5th triode connects, 21 resistance and variable resistor, 21 capacitances in series, the collector of the 22 resistance and the 4th triode, the base stage of the 5th triode connects, the collector of the 23 resistance and the 5th triode, the base stage of the 6th triode connects, 25 resistance is connected with the collector of the 6th triode.
6. current sensor as claimed in claim 1, it is characterized in that, described DC detection circuit comprises the first diode, the second diode, the 31 electric capacity, the 32 electric capacity, the 31 resistance, the 32 resistance, the negative pole of the first diode by the 31 capacity earth and with the 31 resistant series; The positive pole of the second diode by the 4th capacity earth and with the 32 resistant series, the positive pole of the first diode is connected with the negative pole of the second diode, and the 31 resistance is connected with the 32 resistance.
7. current sensor as claimed in claim 1, it is characterized in that, described signal demagnetization circuit comprises the first inductance, the second inductance, switch, the 41 resistance, the 42 resistance, the 43 resistance, the 7th triode, the first chip, first inductance and the second inductance in parallel, second inductance is connected with the collector of the 7th triode, 41 resistance is connected with switch and is connected with the emitter of the 7th triode, 43 resistance, the first chip are all connected with the 42 resistance, and the 42 resistance is connected with the base stage of the 7th triode.
8. current sensor as claimed in claim 1, it is characterized in that, described signal output apparatus comprises the 51 resistance, the 52 resistance, the 53 resistance, the 54 resistance, amplifier, the 51 electric capacity, 52 resistance and the 51 resistor coupled in parallel and with the 53 resistant series, 51 electric capacity and the 54 resistant series, 51 resistance, the 52 resistance, the 53 resistance are all connected with the input positive pole of amplifier, and the 51 electric capacity, the 54 resistance are all connected with the input negative pole of amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520786885.2U CN205027808U (en) | 2015-10-13 | 2015-10-13 | Current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520786885.2U CN205027808U (en) | 2015-10-13 | 2015-10-13 | Current sensor |
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| Publication Number | Publication Date |
|---|---|
| CN205027808U true CN205027808U (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520786885.2U Expired - Fee Related CN205027808U (en) | 2015-10-13 | 2015-10-13 | Current sensor |
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| Country | Link |
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| CN (1) | CN205027808U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116015321A (en) * | 2023-01-03 | 2023-04-25 | 深圳市西京电力科技有限公司 | Novel wireless communication rotary transformer |
-
2015
- 2015-10-13 CN CN201520786885.2U patent/CN205027808U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116015321A (en) * | 2023-01-03 | 2023-04-25 | 深圳市西京电力科技有限公司 | Novel wireless communication rotary transformer |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160210 Termination date: 20181013 |
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| CF01 | Termination of patent right due to non-payment of annual fee |