CN204988584U - High -efficient eddy current dynamometer system based on signal filtering handles - Google Patents
High -efficient eddy current dynamometer system based on signal filtering handles Download PDFInfo
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- CN204988584U CN204988584U CN201520680350.7U CN201520680350U CN204988584U CN 204988584 U CN204988584 U CN 204988584U CN 201520680350 U CN201520680350 U CN 201520680350U CN 204988584 U CN204988584 U CN 204988584U
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Abstract
The utility model discloses a high -efficient eddy current dynamometer system based on signal filtering handles, by signal control unit, the machine controller that awaits measuring who is connected with signal control unit, eddy current loader, the control cabinet, the motor that awaits measuring that is connected with the machine controller that awaits measuring, the signal collector who is connected with the motor that awaits measuring, the signal converting unit who is connected with signal collector, the thermostatic control ware that is connected with eddy current loader, and display that is connected with the control cabinet and power analyzer constitution, the motor that awaits measuring still is connected with eddy current loader, its characterized in that, this power analyzer is connected with signal converting unit through signal filter unit, signal filter unit is by triode VT3, triode VT4, constitutions such as field effect transistor MOS, the utility model discloses a signal filter unit can filter the external disturbance signal that exists in the moment of torsion signal of gathering, makes the moment of torsion signal not by interfering signal influence, improvement measuring accuracy.
Description
Technical field
The utility model relates to a kind of detection system, specifically refers to a kind of efficient eddy current dynamometric system based on signal filtering process.
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 is easily subject to the impact of external interference signal, thus affect its test result.
Utility model content
The purpose of this utility model is to overcome the defect that existing eddy current dynamometric system is easily subject to external interference effect of signals, provides a kind of efficient eddy current dynamometric system based on signal filtering process.
The purpose of this utility model is achieved through the following technical solutions: a kind of efficient eddy current dynamometric system based on signal filtering process, 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 signal filtering unit be connected with signal conversion unit, the power analyzer be connected with signal filtering unit, the radiator valve be connected with current vortex loader, and the display to be connected with control desk forms, described power analyzer also control desk is connected, and treats that measured motor is then connected with current vortex loader.
Further, described signal filtering unit is by triode VT3, triode VT4, field effect transistor MOS, N pole is connected with the base stage of triode VT3, P pole then forms the diode D3 of the input end of this signal filtering unit, negative pole is connected with the collector of triode VT3, the electric capacity C6 that positive pole is then connected with the grid of field effect transistor MOS after diode D4, positive pole is connected with the source electrode of field effect transistor MOS, the electric capacity C9 that negative pole is then connected with the emitter of triode VT3 after resistance R9, positive pole is connected with the positive pole of electric capacity C6, the electric capacity C7 that negative pole is then connected with the negative pole of electric capacity C9, one end is connected with the collector of triode VT4, the potentiometer R10 that the other end is then connected with the negative pole of electric capacity C9 after resistance R11, be serially connected in the electric capacity C8 between the emitter of triode VT4 and the drain electrode of field effect transistor MOS, and one end is connected with the collector of triode VT4, while the other end is then connected with the negative pole of electric capacity C9, the resistance R12 of ground connection forms, the base stage of described triode VT4 is connected with the collector of triode VT3, and its collector and emitter is all connected with the control end of potentiometer R10, the grid of described field effect transistor MOS is connected with the tie point of resistance R11 with potentiometer R10, the emitter of described VT4 is also as the output terminal of this signal filtering unit.
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.
Described conversion chip U is LM331 integrated chip.
The utility model comparatively prior art is compared, and has the following advantages and beneficial effect:
(1) the utility model sample rate 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 utility model effectively can avoid temperature drift, guarantees the precision that torque data is measured.
(3) the utility model can be filtered external interference signal existing in the torque signal collected by signal filtering unit, makes the not disturbed effect of signals of torque signal, improves measuring accuracy.
Accompanying drawing explanation
Fig. 1 is one-piece construction block diagram of the present utility model.
Fig. 2 is signal conversion unit circuit structure diagram of the present utility model.
Fig. 3 is signal filtering element circuit structural drawing of the present utility model.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, the utility model comprises treats measured motor, electric machine controller to be measured, current vortex loader, signaling control unit, radiator valve, control desk, signal picker, signal conversion unit, signal filtering unit, power analyzer and display 11 part.
Wherein, 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; Mix in digital electric signal after conversion and have extraneous undesired signal, it can affect digital electric signal; Therefore signal filtering unit is connected with signal conversion unit, and it is for filtering extraneous undesired signal.Power analyzer then needs to be connected with signal filtering unit, 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.
In addition, as shown in Figure 3, it is by triode VT3, triode VT4, field effect transistor MOS, resistance R9, potentiometer R10, resistance R11, resistance R12, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9 for the structure of this signal filtering unit, and diode D3 and diode D4 forms.
Wherein, the input end that the N pole of diode D3 is connected with the base stage of triode VT3, its P pole then forms this signal filtering unit.The positive pole of electric capacity C9 is connected with the source electrode of field effect transistor MOS, its negative pole is then connected with the emitter of triode VT3 after resistance R9.The negative pole of electric capacity C6 is connected with the collector of triode VT3, its positive pole is then connected with the grid of field effect transistor MOS after diode D4; The positive pole of electric capacity C7 is connected with the positive pole of electric capacity C6, its negative pole is then connected with the negative pole of electric capacity C9; One end of potentiometer R10 is connected with the collector of triode VT4, its other end is then connected with the negative pole of electric capacity C9 after resistance R11, ground connection while between the emitter that electric capacity C8 is then serially connected in triode VT4 and the drain electrode of field effect transistor MOS, one end of resistance R12 is connected with the collector of triode VT4, its other end is then connected with the negative pole of electric capacity C9.
The base stage of this triode VT4 is connected with the collector of triode VT3, and its collector and emitter is all connected with the control end of potentiometer R10.The grid of described field effect transistor MOS is connected with the tie point of resistance R11 with potentiometer R10.The emitter of described VT4 is also as the output terminal of this signal filtering unit.By said structure, this electric capacity C6, electric capacity C7 and diode D4 then form a rectifier filer, and signal is then input to by resistance R11 after rectifier filer process, and the wave filter that electric capacity C9, field effect transistor MOS and electric capacity C8 form carries out filtering process.Therefore, the signal exported from signal filtering unit is no longer subject to the impact of external interference signal.
As mentioned above, just well the utility model can be implemented.
Claims (6)
1. the efficient eddy current dynamometric system based on signal filtering process, 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, and the display be connected with control desk and power analyzer form, describedly treat that measured motor is also connected with current vortex loader, it is characterized in that, this power analyzer is connected with signal conversion unit by signal filtering unit, described signal filtering unit is by triode VT3, triode VT4, field effect transistor MOS, N pole is connected with the base stage of triode VT3, P pole then forms the diode D3 of the input end of this signal filtering unit, negative pole is connected with the collector of triode VT3, the electric capacity C6 that positive pole is then connected with the grid of field effect transistor MOS after diode D4, positive pole is connected with the source electrode of field effect transistor MOS, the electric capacity C9 that negative pole is then connected with the emitter of triode VT3 after resistance R9, positive pole is connected with the positive pole of electric capacity C6, the electric capacity C7 that negative pole is then connected with the negative pole of electric capacity C9, one end is connected with the collector of triode VT4, the potentiometer R10 that the other end is then connected with the negative pole of electric capacity C9 after resistance R11, be serially connected in the electric capacity C8 between the emitter of triode VT4 and the drain electrode of field effect transistor MOS, and one end is connected with the collector of triode VT4, while the other end is then connected with the negative pole of electric capacity C9, the resistance R12 of ground connection forms, the base stage of described triode VT4 is connected with the collector of triode VT3, and its collector and emitter is all connected with the control end of potentiometer R10, the grid of described field effect transistor MOS is connected with the tie point of resistance R11 with potentiometer R10, the emitter of described VT4 is also as the output terminal of this signal filtering unit.
2. a kind of efficient eddy current dynamometric system based on signal filtering process according to claim 1, 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.
3. a kind of efficient eddy current dynamometric system based on signal filtering process according to claim 2, 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.
4. a kind of efficient eddy current dynamometric system based on signal filtering process according to claim 3, 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.
5. a kind of efficient eddy current dynamometric system based on signal filtering process according to claim 4, 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.
6. a kind of efficient eddy current dynamometric system based on signal filtering process according to claim 5, is characterized in that: described conversion chip U is LM331 integrated chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520680350.7U CN204988584U (en) | 2015-09-06 | 2015-09-06 | High -efficient eddy current dynamometer system based on signal filtering handles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520680350.7U CN204988584U (en) | 2015-09-06 | 2015-09-06 | High -efficient eddy current dynamometer system based on signal filtering handles |
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| CN204988584U true CN204988584U (en) | 2016-01-20 |
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| CN201520680350.7U Expired - Fee Related CN204988584U (en) | 2015-09-06 | 2015-09-06 | High -efficient eddy current dynamometer system based on signal filtering handles |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20160906 |
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| CF01 | Termination of patent right due to non-payment of annual fee |