CN105115646A - Logic protection amplification circuit-based constant current source eddy current power-measuring system - Google Patents
Logic protection amplification circuit-based constant current source eddy current power-measuring system Download PDFInfo
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- CN105115646A CN105115646A CN201510557371.4A CN201510557371A CN105115646A CN 105115646 A CN105115646 A CN 105115646A CN 201510557371 A CN201510557371 A CN 201510557371A CN 105115646 A CN105115646 A CN 105115646A
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Abstract
The invention discloses a logic protection amplification circuit-based constant current source eddy current power-measuring system. The logic protection amplification circuit-based constant current source eddy current power-measuring system is composed of a signal control unit, a to-be-measured motor controller, an eddy current loader and a console which are connected with the signal control unit, a to-be-measured motor which is connected with the to-be-measured motor controller, a signal collector which is connected with the to-be-measured motor, a signal conversion unit which is connected with the signal collector, a thermostatic controller which is connected with the eddy current loader, a display and a power analyzer which are connected with the console, a constant current control unit which is connected with the to-be-measured motor controller, and a power source which is connected with the constant current control unit, wherein the to-be-measured motor is also connected with the eddy current loader. The system is characterized in that the power analyzer is connected with the signal conversion unit through a logic protection amplification circuit. With the system of the invention adopted, distortion-free amplification can be performed on converted digital electric signals, so that signals received by the console can be more clear, and judgment performed by testers can be facilitated.
Description
Technical field
The present invention relates to a kind of detection system, specifically refer to the constant current source eddy current dynamometric system of logic-based protection amplifying circuit.
Background technology
The Main Means of the electronic performance of current test electric automobile utilizes the equipment of test traditional combustion engine to carry out the tests such as loading, utilize the checkout equipment such as voltage table and reometer to carry out the Data Detection of electrical quantity, after having detected, carry out process and the analysis of data again.And there is larger difference in the test of power driven system and the test of conventional engines, the characteristic such as rotating speed and moment of torsion of what traditional combustion engine mainly detected is motor, the parameter such as power factor, line voltage, line current, active power of its correspondence cannot directly obtain in calculating, and utilize the checkout equipment such as voltage table and reometer detect poor real, cannot Real-time Collection to institute's survey internal combustion engine comprehensive parameters and show.What detection power driven system was more focused on is various electrical parameters, and very high to the requirement of real-time of data processing, gathers to the process of the electric signal of complexity and analyzes with regard to requiring to use more complicated instrumentation.Thus, current market has occurred eddy current dynamometric system, it adopts current vortex loader to load to motor, and tests out the realtime power of motor.But existing eddy current dynamometric system easily makes distorted signals when amplifying the torque signal collected, thus affect the judgement of tester to test result.
Summary of the invention
The object of the invention is to overcome existing eddy current dynamometric system easily causes distorted signals defect when amplifying the torque signal collected, providing a kind of logic-based to protect the constant current source eddy current dynamometric system of amplifying circuit.
Object of the present invention is achieved through the following technical solutions: the constant current source eddy current dynamometric system of logic-based protection amplifying circuit, it is by signaling control unit, the electric machine controller to be measured be connected with signaling control unit, current vortex loader, control desk, what be connected with electric machine controller to be measured treats measured motor, with treat the signal picker that measured motor is connected, the signal conversion unit be connected with signal picker, the radiator valve be connected with current vortex loader, the display be connected with control desk and power analyzer, the constant-current control unit be connected with electric machine controller to be measured, the power supply be connected with constant-current control unit, and the virtual protection amplifying circuit composition be serially connected between power analyzer and signal conversion unit.Describedly treat that measured motor is also connected with current vortex loader.
Further, described virtual protection amplifying circuit is by amplifier P1, Sheffer stroke gate A1, Sheffer stroke gate A2, N pole is connected with the negative pole of amplifier P1, P pole then forms the diode D6 of the input end of this virtual protection amplifying circuit, positive pole is connected with the positive pole of amplifier P1, the electric capacity C11 of minus earth, one end is connected with the negative pole of amplifier P1, the resistance R16 that the other end is then connected with the negative pole of electric capacity C11, the electric capacity C10 be in parallel with resistance R16, be serially connected in the resistance R17 between the positive pole of amplifier P1 and output terminal, N pole is connected with the output terminal of Sheffer stroke gate A1, the diode D5 that P pole is then connected with the negative pole of electric capacity C11, and one end is connected with the output terminal of Sheffer stroke gate A2, the resistance R18 that the other end then forms the output terminal of this virtual protection amplifying circuit forms, the plus earth of described Sheffer stroke gate A1, its output terminal and negative pole are then all connected with the output terminal of amplifier P1, the positive pole of described Sheffer stroke gate A2 is all connected with the output terminal of amplifier P1 with negative pole.
Described constant-current control unit is by transformer T, process chip U1, triode VT4, one end is connected with transformer T former limit Same Name of Ends, the other end then forms the inductance L 1 of the input end of this constant-current control unit together with the non-same polarity of transformer T former limit, be serially connected in the resistance R9 between transformer T secondary Same Name of Ends and the FB pin of process chip U1, one end is connected with the FB pin of process chip U1, the resistance R10 that the other end is then connected with the COMP pin of process chip U1 after resistance R11, positive pole is connected with the BIAS pin of process chip U1, the electric capacity C7 that negative pole is then connected with the tie point of resistance R10 with resistance R11, positive pole is connected with the VDD pin of process chip U1, the electric capacity C6 that negative pole is then connected with the tie point of resistance R10 with resistance R11, be serially connected in the resistance R15 between the collector of triode VT4 and the OUT pin of process chip U1, positive pole is connected with the CS pin of process chip U1, negative pole then forms the polar capacitor C8 of the output terminal of this constant-current control unit together with the collector of triode VT4, and the voltage stabilizing power supplying circuit composition be serially connected between transformer T secondary non-same polarity and the VCC pin of process chip U1, the base stage of described triode VT4 is connected with the GND pin of process chip U1, its grounded emitter.
Described voltage stabilizing power supplying circuit is by triode VT3, P pole is connected with transformer T secondary non-same polarity after resistance R12, the diode D3 that N pole is then connected with the emitter of triode VT3, N pole is connected with the base stage of triode VT3, the voltage stabilizing diode D4 of P pole ground connection, positive pole is connected with the emitter of triode VT3, the polar capacitor C9 that negative pole is then connected with the P pole of voltage stabilizing diode D4, be serially connected in the resistance R13 between the emitter of triode VT3 and base stage, and one end is connected with the collector of triode VT3, the resistance R14 that the other end is then connected with the VCC pin of process chip U1 forms.
Described signal conversion unit by conversion chip U, resistance R3, resistance R4, diode D1, electric capacity C3, input circuit, output circuit and buffer circuit composition; One end of described resistance R4 is connected with the INPUT pin of conversion chip U, the other end is then connected with input circuit after resistance R3; The P pole of diode D1 is connected with the tie point of resistance R4 with resistance R3, its N pole ground connection; The negative pole of electric capacity C3 is connected with the VS pin of conversion chip U, its positive pole then connects 15V voltage; Described input circuit, output circuit and buffer circuit are all connected with conversion chip U.
Described input circuit is by amplifier P, triode VT1, negative pole is connected with the positive pole of amplifier P1, the electric capacity C1 of plus earth, the resistance R1 be in parallel with electric capacity C1, the resistance R2 that one end is connected with the negative pole of amplifier P, the other end then forms the input end of this signal conversion unit, and the electric capacity C2 that positive pole is connected with the emitter of triode VT1, negative pole is then connected with the OUTPUT pin of conversion chip U forms; The output terminal of described amplifier P is connected with the INPUT pin of conversion chip U after resistance R4 through resistance R3 in turn; The collector of described triode VT1 is connected with the output terminal of amplifier P, and its base stage is then connected with the A/C pin of conversion chip U; The GND pin ground connection of described conversion chip U.
Described buffer circuit comprises resistance R5, resistance R6 and electric capacity C5; The positive pole of described electric capacity C5 is connected with the THR pin of conversion chip U, its minus earth; One end of resistance R6 is connected with the negative pole of electric capacity C5, its other end is then connected with the OUTPUT pin of conversion chip U after resistance R5; The THR pin of described conversion chip U is also connected with the tie point of resistance R6 with resistance R5.
Described output circuit comprises triode VT2, diode D2, electric capacity C4, resistance R7 and resistance R8; Described electric capacity C4 is serially connected between the FOUT pin of conversion chip U and the collector of triode VT2, diode D2 is then serially connected between the CUAREN pin of conversion chip U and the base stage of triode VT2, and one end of resistance R7 is connected with the CUAREN pin of conversion chip U, its other end then ground connection after resistance R8; The collector of described triode VT2 forms the output terminal of this signal conversion unit, and its emitter is then connected with the tie point of resistance R8 with resistance R7.
Better test effect to reach, described conversion chip U is preferably LM331 integrated chip, and process chip U1 then preferentially selects AP3706 integrated chip to realize.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) sample rate of the present invention is fast, and data-handling capacity is powerful, ensure that the precision of all electrical quantitys and the reliability of data and promptness.
(2) the present invention effectively can avoid temperature drift, guarantees the precision that torque data is measured.
(3) the present invention has constant working current, and therefore it can not be subject to the impact of current fluctuation, improves its stability.
(4) the present invention can carry out distortionless amplification to the digital electric signal after conversion, makes the signal received by control desk more clear, is convenient to tester and judges.
Accompanying drawing explanation
Fig. 1 is one-piece construction block diagram of the present invention.
Fig. 2 is signal conversion unit circuit structure diagram of the present invention.
Fig. 3 is constant-current control unit circuit structure diagram of the present invention.
Fig. 4 is virtual protection amplification circuit structure figure of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, the present invention includes and treat measured motor, electric machine controller to be measured, current vortex loader, signaling control unit; radiator valve, control desk, signal picker, signal conversion unit; virtual protection amplifying circuit, constant-current control unit, power supply, power analyzer and display 13 part.
Wherein, constant-current control unit is connected with power supply, and this power supply is used for providing working power to system, and constant-current control unit then can guarantee that system has constant working current.Treat that measured motor is then connected with constant-current control unit, electric machine controller to be measured with treat that measured motor is connected for controlling motor speed to be measured, start and stop etc.Current vortex loader then by shaft coupling with treat that measured motor is connected, it is for treating that measured motor loads.Signaling control unit is then connected with current vortex loader with electric machine controller to be measured respectively, and it can treat measured motor controller and current vortex loader transmits control signal, thus realizes the control to them.
This control desk and display are then man-machine exchanging window, and this display is connected with control desk, and it treats the parameters of measured motor for showing; Control desk is then for receiving the parameters signal for the treatment of measured motor and treating measured motor and current vortex loader controls, and therefore its needs are connected with signaling control unit; When measured motor treated by needs or current vortex loader controls, tester only need send control signal to signaling control unit on control desk, signaling control unit identifies control signal, classify after send to electric machine controller to be measured and current vortex loader respectively; Therefore, can control to treat the permanent rotating speed of measured motor by control desk, the permanent rotating speed of current vortex loader, the permanent moment of torsion isotype of current vortex loader.
Gather to treat the parameter of measured motor in various pattern, this signal picker need with treat that measured motor is connected; Signal conversion unit is then connected with signal picker, and it is converted to digital electric signal for the torque signal collected signal picker; Virtual protection amplifying circuit can carry out distortionless amplification to the digital electric signal after conversion, and it need be connected with signal conversion unit.Power analyzer needs to be connected with virtual protection amplifying circuit, and it calculates the time real power until measured motor by the digital electric signal of change; This control desk is then connected with power analyzer, and therefore it can receive the time real power until measured motor.This signal picker can be selected strain-type torque sensor to realize; The WT3000 type power analyzer that power analyzer then can preferentially select the dynamo-electric science and technology of Japanese Yokogawa to produce realizes, and this model power analyzer data-handling capacity is powerful, corresponding speed fast, can well guarantee reliability and the promptness of test data.
In addition, this radiator valve needs to be connected with current vortex loader, its temperature drift that can occur in elimination system, the measuring accuracy of raising system.
In order to improve the conversion efficiency of torque signal, as shown in Figure 2, it is by conversion chip U, resistance R3, resistance R4, diode D1, electric capacity C3, input circuit for the structure of described signal conversion unit, output circuit and a few part composition of buffer circuit.
During connection, one end of described resistance R4 is connected with the INPUT pin of conversion chip U, the other end is then connected with input circuit after resistance R3.The P pole of diode D1 is connected with the tie point of resistance R4 with resistance R3, its N pole ground connection.
In order to provide operating voltage to conversion chip U, the negative pole of this electric capacity C3 is connected with the VS pin of conversion chip U, its positive pole then connects 15V voltage.Described input circuit, output circuit and buffer circuit are all connected with conversion chip U.In order to reach better implementation result, this conversion chip U preferentially selects LM331 integrated chip to realize.
In addition, described input circuit is by amplifier P, triode VT1, negative pole is connected with the positive pole of amplifier P1, the electric capacity C1 of plus earth, the resistance R1 be in parallel with electric capacity C1, the resistance R2 that one end is connected with the negative pole of amplifier P, the other end then forms the input end of this signal conversion unit, and the electric capacity C2 that positive pole is connected with the emitter of triode VT1, negative pole is then connected with the OUTPUT pin of conversion chip U forms.The output terminal of described amplifier P is connected with the INPUT pin of conversion chip U after resistance R4 through resistance R3 in turn.The collector of described triode VT1 is connected with the output terminal of amplifier P, and its base stage is then connected with the A/C pin of conversion chip U.Pass through said structure, this electric capacity C1, resistance R1, resistance R2, amplifier P and triode VT1 form an integrator, electric capacity C2 is then integrating capacitor, the A/C pin of conversion chip U and OUTPUT pin can be made to keep electronegative potential by integrator and integrating capacitor, therefore the voltage of conversion chip U remains constant, can improve the linearity of signal conversion thus.
Described buffer circuit then comprises resistance R5, resistance R6 and electric capacity C5.The positive pole of described electric capacity C5 is connected with the THR pin of conversion chip U, its minus earth.One end of resistance R6 is connected with the negative pole of electric capacity C5, its other end is then connected with the OUTPUT pin of conversion chip U after resistance R5.The THR pin of described conversion chip U is also connected with the tie point of resistance R6 with resistance R5.The GND pin ground connection of described conversion chip U.
This output circuit comprises triode VT2, diode D2, electric capacity C4, resistance R7 and resistance R8.Wherein, electric capacity C4 is serially connected between the FOUT pin of conversion chip U and the collector of triode VT2, diode D2 is then serially connected between the CUAREN pin of conversion chip U and the base stage of triode VT2, and one end of resistance R7 is connected with the CUAREN pin of conversion chip U, its other end then ground connection after resistance R8.The collector of described triode VT2 forms the output terminal of this signal conversion unit, and its emitter is then connected with the tie point of resistance R8 with resistance R7.
As shown in Figure 3, it comprises transformer T to the structure of this constant-current control unit, process chip U1, triode VT4, inductance L 1, resistance R9, resistance R10, resistance R11, resistance R15, electric capacity C6, electric capacity C7, polar capacitor C8, and voltage stabilizing power supplying circuit composition.
Described voltage stabilizing power supplying circuit provides stable operating voltage for process chip U1, it is by triode VT3, P pole is connected with transformer T secondary non-same polarity after resistance R12, the diode D3 that N pole is then connected with the emitter of triode VT3, N pole is connected with the base stage of triode VT3, the voltage stabilizing diode D4 of P pole ground connection, positive pole is connected with the emitter of triode VT3, the polar capacitor C9 that negative pole is then connected with the P pole of voltage stabilizing diode D4, be serially connected in the resistance R13 between the emitter of triode VT3 and base stage, and one end is connected with the collector of triode VT3, the resistance R14 that the other end is then connected with the VCC pin of process chip U1 forms.
In addition, one end of inductance L 1 is connected with transformer T former limit Same Name of Ends, its other end then forms the input end of this constant-current control unit together with the non-same polarity of transformer T former limit, resistance R9 is serially connected between transformer T secondary Same Name of Ends and the FB pin of process chip U1, one end of resistance R10 is connected with the FB pin of process chip U1, its other end is then connected with the COMP pin of process chip U1 after resistance R11, the positive pole of electric capacity C7 is connected with the BIAS pin of process chip U1, its negative pole is then connected with the tie point of resistance R10 with resistance R11, the positive pole of electric capacity C6 is connected with the VDD pin of process chip U1, its negative pole is then connected with the tie point of resistance R10 with resistance R11, resistance R15 is then serially connected between the collector of triode VT4 and the OUT pin of process chip U1, the positive pole of polar capacitor C8 is connected with the CS pin of process chip U1, its negative pole then forms the output terminal of this constant-current control unit together with the collector of triode VT4.The base stage of described triode VT4 is connected with the GND pin of process chip U1, its grounded emitter.In order to reach better implementation result, this process chip U1 preferentially selects AP3706 integrated chip to realize.
Then as shown in Figure 4, it comprises amplifier P1 to the structure of virtual protection amplifying circuit, Sheffer stroke gate A1, Sheffer stroke gate A2, diode D5, diode D6, resistance R13, resistance R14, resistance R15, electric capacity C10 and electric capacity C11.
Wherein, diode D6, diode D5, electric capacity C10, electric capacity C11, resistance R16, resistance R17, and amplifier P1 forms a linear amplifier, its concrete structure is: the N pole of diode D6 is connected with the negative pole of amplifier P1, its P pole then forms the input end of this virtual protection amplifying circuit, the positive pole of electric capacity C11 is connected with the positive pole of amplifier P1, its minus earth, one end of resistance R16 is connected with the negative pole of amplifier P1, its other end is then connected with the negative pole of electric capacity C11, electric capacity C10 is then in parallel with resistance R16, between the positive pole that resistance R17 is then serially connected in amplifier P1 and output terminal, the N pole of diode D5 is connected with the output terminal of Sheffer stroke gate A1, its P pole is then connected with the negative pole of electric capacity C11.By said structure, this linear amplifier can carry out continuous print amplification to digital electric signal, thus avoids the digital electric signal after amplifying to occur the existing picture of distortion.
This Sheffer stroke gate A1, Sheffer stroke gate A2 and resistance R18 then form a scrambler, and its concrete structure is: the output terminal that one end of resistance R18 is connected with the output terminal of Sheffer stroke gate A2, its other end then forms this virtual protection amplifying circuit.The plus earth of described Sheffer stroke gate A1, its output terminal and negative pole are then all connected with the output terminal of amplifier P1.The positive pole of described Sheffer stroke gate A2 is all connected with the output terminal of amplifier P1 with negative pole.
As mentioned above, just well the present invention can be implemented.
Claims (8)
1. the constant current source eddy current dynamometric system of logic-based protection amplifying circuit, it is by signaling control unit, the electric machine controller to be measured be connected with signaling control unit, current vortex loader, control desk, what be connected with electric machine controller to be measured treats measured motor, with treat the signal picker that measured motor is connected, the signal conversion unit be connected with signal picker, the radiator valve be connected with current vortex loader, the display be connected with control desk and power analyzer, the constant-current control unit be connected with electric machine controller to be measured, the power supply be connected with constant-current control unit forms, describedly treat that measured motor is also connected with current vortex loader, it is characterized in that, described power analyzer is connected with signal conversion unit by virtual protection amplifying circuit, described virtual protection amplifying circuit is by amplifier P1, Sheffer stroke gate A1, Sheffer stroke gate A2, N pole is connected with the negative pole of amplifier P1, P pole then forms the diode D6 of the input end of this virtual protection amplifying circuit, positive pole is connected with the positive pole of amplifier P1, the electric capacity C11 of minus earth, one end is connected with the negative pole of amplifier P1, the resistance R16 that the other end is then connected with the negative pole of electric capacity C11, the electric capacity C10 be in parallel with resistance R16, be serially connected in the resistance R17 between the positive pole of amplifier P1 and output terminal, N pole is connected with the output terminal of Sheffer stroke gate A1, the diode D5 that P pole is then connected with the negative pole of electric capacity C11, and one end is connected with the output terminal of Sheffer stroke gate A2, the resistance R18 that the other end then forms the output terminal of this virtual protection amplifying circuit forms, the plus earth of described Sheffer stroke gate A1, its output terminal and negative pole are then all connected with the output terminal of amplifier P1, the positive pole of described Sheffer stroke gate A2 is all connected with the output terminal of amplifier P1 with negative pole, described constant-current control unit is by transformer T, process chip U1, triode VT4, one end is connected with transformer T former limit Same Name of Ends, the other end then forms the inductance L 1 of the input end of this constant-current control unit together with the non-same polarity of transformer T former limit, be serially connected in the resistance R9 between transformer T secondary Same Name of Ends and the FB pin of process chip U1, one end is connected with the FB pin of process chip U1, the resistance R10 that the other end is then connected with the COMP pin of process chip U1 after resistance R11, positive pole is connected with the BIAS pin of process chip U1, the electric capacity C7 that negative pole is then connected with the tie point of resistance R10 with resistance R11, positive pole is connected with the VDD pin of process chip U1, the electric capacity C6 that negative pole is then connected with the tie point of resistance R10 with resistance R11, be serially connected in the resistance R15 between the collector of triode VT4 and the OUT pin of process chip U1, positive pole is connected with the CS pin of process chip U1, negative pole then forms the polar capacitor C8 of the output terminal of this constant-current control unit together with the collector of triode VT4, and the voltage stabilizing power supplying circuit composition be serially connected between transformer T secondary non-same polarity and the VCC pin of process chip U1, the base stage of described triode VT4 is connected with the GND pin of process chip U1, its grounded emitter.
2. the constant current source eddy current dynamometric system of logic-based protection amplifying circuit according to claim 1, it is characterized in that: described voltage stabilizing power supplying circuit is by triode VT3, P pole is connected with transformer T secondary non-same polarity after resistance R12, the diode D3 that N pole is then connected with the emitter of triode VT3, N pole is connected with the base stage of triode VT3, the voltage stabilizing diode D4 of P pole ground connection, positive pole is connected with the emitter of triode VT3, the polar capacitor C9 that negative pole is then connected with the P pole of voltage stabilizing diode D4, be serially connected in the resistance R13 between the emitter of triode VT3 and base stage, and one end is connected with the collector of triode VT3, the resistance R14 that the other end is then connected with the VCC pin of process chip U1 forms.
3. the constant current source eddy current dynamometric system of logic-based according to claim 2 protection amplifying circuit, is characterized in that: described signal conversion unit by conversion chip U, resistance R3, resistance R4, diode D1, electric capacity C3, input circuit, output circuit and buffer circuit composition; One end of described resistance R4 is connected with the INPUT pin of conversion chip U, the other end is then connected with input circuit after resistance R3; The P pole of diode D1 is connected with the tie point of resistance R4 with resistance R3, its N pole ground connection; The negative pole of electric capacity C3 is connected with the VS pin of conversion chip U, its positive pole then connects 15V voltage; Described input circuit, output circuit and buffer circuit are all connected with conversion chip U.
4. the constant current source eddy current dynamometric system of logic-based protection amplifying circuit according to claim 3, it is characterized in that: described input circuit is by amplifier P, triode VT1, negative pole is connected with the positive pole of amplifier P1, the electric capacity C1 of plus earth, the resistance R1 be in parallel with electric capacity C1, the resistance R2 that one end is connected with the negative pole of amplifier P, the other end then forms the input end of this signal conversion unit, and the electric capacity C2 that positive pole is connected with the emitter of triode VT1, negative pole is then connected with the OUTPUT pin of conversion chip U forms; The output terminal of described amplifier P is connected with the INPUT pin of conversion chip U after resistance R4 through resistance R3 in turn; The collector of described triode VT1 is connected with the output terminal of amplifier P, and its base stage is then connected with the A/C pin of conversion chip U; The GND pin ground connection of described conversion chip U.
5. the constant current source eddy current dynamometric system of logic-based protection amplifying circuit according to claim 4, is characterized in that: described buffer circuit comprises resistance R5, resistance R6 and electric capacity C5; The positive pole of described electric capacity C5 is connected with the THR pin of conversion chip U, its minus earth; One end of resistance R6 is connected with the negative pole of electric capacity C5, its other end is then connected with the OUTPUT pin of conversion chip U after resistance R5; The THR pin of described conversion chip U is also connected with the tie point of resistance R6 with resistance R5.
6. the constant current source eddy current dynamometric system of logic-based protection amplifying circuit according to claim 5, is characterized in that: described output circuit comprises triode VT2, diode D2, electric capacity C4, resistance R7 and resistance R8; Described electric capacity C4 is serially connected between the FOUT pin of conversion chip U and the collector of triode VT2, diode D2 is then serially connected between the CUAREN pin of conversion chip U and the base stage of triode VT2, and one end of resistance R7 is connected with the CUAREN pin of conversion chip U, its other end then ground connection after resistance R8; The collector of described triode VT2 forms the output terminal of this signal conversion unit, and its emitter is then connected with the tie point of resistance R8 with resistance R7.
7. the constant current source eddy current dynamometric system of logic-based protection amplifying circuit according to claim 6, is characterized in that: described conversion chip U is LM331 integrated chip.
8. the constant current source eddy current dynamometric system of the logic-based protection amplifying circuit according to any one of claim 1 ~ 6, is characterized in that: described process chip U1 is AP3706 integrated chip.
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| CN201510557371.4A CN105115646A (en) | 2015-09-06 | 2015-09-06 | Logic protection amplification circuit-based constant current source eddy current power-measuring system |
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| CN201510557371.4A CN105115646A (en) | 2015-09-06 | 2015-09-06 | Logic protection amplification circuit-based constant current source eddy current power-measuring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105975381A (en) * | 2016-04-06 | 2016-09-28 | 浙江工业大学 | Integrated development platform for fault monitoring expert systems |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105975381A (en) * | 2016-04-06 | 2016-09-28 | 浙江工业大学 | Integrated development platform for fault monitoring expert systems |
| CN105975381B (en) * | 2016-04-06 | 2019-05-31 | 浙江工业大学 | Malfunction monitoring expert system integrating and developing platform |
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