CN104864992A - Phase-locked type torque sensor for engine performance test - Google Patents
Phase-locked type torque sensor for engine performance test Download PDFInfo
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- CN104864992A CN104864992A CN201510202636.9A CN201510202636A CN104864992A CN 104864992 A CN104864992 A CN 104864992A CN 201510202636 A CN201510202636 A CN 201510202636A CN 104864992 A CN104864992 A CN 104864992A
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Abstract
The invention discloses a phase-locked type torque sensor for an engine performance test. The torque sensor is mainly formed by a torsion shaft (1), a displayer (6), a collector ring (3) arranged on the torsion shaft (1), a strain gage (2) pasted on the torsion shaft (1) and connected with the collector ring (3), and an oscillator (4) connected with the collector ring (3). The phase-locked type torque sensor is characterized in that a signal phase-lock processing system (5) is arranged between the collector ring (3) and the displayer (6). The phase-locked type torque sensor can carry out phase-lock processing on signal frequency of the torque to enable the input frequency to be equal to the output frequency, so that when the engine torque is changed, real-time torque of an engine can still be measured accurately.
Description
Technical field
The present invention relates to a kind of sensor, specifically refer to a kind of engine performance measuring phase-locking type torque sensor.
Background technology
Along with the development of economy, automobile has become the requisite vehicles in a lot of family.And engine is as " heart " of automobile, the quality of its performance then directly affects the performance of automobile.Therefore, engine usually all can carry out all-round property testing before dispatching from the factory, and the torsion-testing of engine is then critical step in all-round property testing, and it directly affects the performance index of engine.But engine operationally its moment of torsion can change, actual torque engine being detected that at this moment traditional torque sensor then cannot be stable, therefore assesses the very large obstacle brought to engine performance.
Summary of the invention
The object of the invention is to overcome defect engine actual torque being detected that traditional torque sensor cannot be stable when engine torque changes, a kind of engine performance measuring phase-locking type torque sensor is provided.
Object of the present invention is achieved through the following technical solutions: a kind of engine performance measuring phase-locking type torque sensor, primarily of torsion shaft, display instrument, be arranged on the collector ring in torsion shaft, be pasted onto the foil gauge be connected in torsion shaft and with collector ring, the oscillator be connected with collector ring, is also provided with signal locking disposal system between collector ring and display instrument; Described signal locking disposal system is then by front end input circuit, and the phase lock circuitry be connected with front end input circuit, the signal amplification circuit be connected with phase lock circuitry, the change-over circuit be connected with signal amplification circuit forms.
Further, described front end input circuit comprises resistance R1, resistance R2, inductance L 1, inductance L 2, diode D1, diode D2, diode D3 and electric capacity C1, the P pole ground connection of described diode D1, N pole is then connected with the N pole of diode D2 after polar capacitor C1, one end of resistance R1 is connected with the N pole of diode D1, the other end is then as an input pole of circuit, one end of resistance R2 is connected with the N pole of diode D1, the other end is then connected with phase lock circuitry, one end of inductance L 2 is connected with the N pole of diode D1 after resistance R2, the other end is then connected with the p pole of diode D2, the N pole of described diode D2 after inductance L 1 as another input pole of circuit, P pole is connected with phase lock circuitry, the N pole of diode D3 is connected with the P pole of diode D2, ground connection while P pole is then connected with phase lock circuitry.
Described phase lock circuitry is by field effect transistor Q1, triode VT1, triode VT2, the polar capacitor C2 that positive pole is connected with the emitter of triode VT1 after resistance R3, negative pole is then connected with the base stage of triode VT1, the resistance R4 that one end is connected with the collector of triode VT1, the other end is connected with the collector of triode VT2 after inductance L 4, the resistance R6 that one end is connected with the base stage of triode VT2, the other end is connected with signal amplification circuit, and one end is connected with the base stage of triode VT2 after inductance L 3, the resistance R5 of other end ground connection forms; The grid of described field effect transistor Q1 is connected with the N pole of diode D3, source electrode is connected with the base stage of triode VT2, it drains and be then connected with the collector of triode VT1, the collector of described triode VT1 is connected with the tie point of inductance L 2 with resistance R2, its base stage is then connected with signal amplification circuit, and the collector of described triode VT2 is respectively with the P pole of diode D3 and signal amplification circuit is connected, its grounded emitter.
Described signal amplification circuit is by amplifier P1, triode VT3, triode VT4, positive pole is connected with the base stage of triode VT1 after resistance R7, the polar capacitor C4 that negative pole is then connected with the positive pole of amplifier P1, positive pole is connected with the negative pole of amplifier P1 after resistance R8, the polar capacitor C3 that negative pole is then connected with the base stage of triode VT2 after resistance R6, positive pole is connected with the negative pole of polar capacitor C3, the electrode capacitance C5 that negative pole is connected with change-over circuit, one end is connected with the emitter of triode VT4, the resistance R9 that the other end is connected with the negative pole of amplifier P1, one end is connected with the base stage of triode VT4, the resistance R10 that the other end is connected with the base stage of triode VT1, and N pole is connected with the base stage of triode VT1, the voltage stabilizing diode D4 of P pole ground connection forms, the base stage of described triode VT3 is connected with the collector of triode VT2, its emitter is connected with the negative pole of polar capacitor C3, collector is connected with the base stage of triode VT1, and the collector of described triode VT4 is connected with change-over circuit respectively with the output terminal of amplifier P1.
Described change-over circuit is by conversion chip U, field effect transistor Q2, triode VT5, triode VT6, rejection gate A, the diode D5 that the negative pole of P pole AND OR NOT gate A is connected, N pole is connected with the IN+ pin of conversion chip U, the diode D6 that N pole is connected with the drain electrode of field effect transistor Q2, P pole is then connected with the OUT pin of conversion chip U after resistance R12, the resistance R11 that one end is connected with the base stage of triode VT5, the other end is then connected with the source electrode of field effect transistor Q2 forms, the positive pole of described rejection gate A is connected with the collector of triode VT4, output terminal is then connected with the emitter of triode VT5, the IN+ pin of described conversion chip U is connected with the output terminal of amplifier P1, its IN-pin is then connected with the negative pole of polar capacitor C5, GND pin ground connection, OUT pin is also connected with the grid of field effect transistor Q2, VCC pin connects 15V voltage, the output terminal of the base stage AND OR NOT gate A of described triode VT5 is connected, collector is connected with the base stage of triode VT6, the collector of triode VT6 is connected with the emitter of triode VT5, its emitter is then connected with the P pole of diode D6.
Described conversion chip U is LM393 type integrated chip.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention can carry out phase-locked process to the signal frequency of moment of torsion, makes the frequency of input equal with the frequency of output, makes engine torque can also measure the real-time moment of torsion of engine accurately after changing.
(2) the present invention can improve antijamming capability, and make signal interference from extraneous factor in the process of transmission, therefore its moment of torsion measures more stable.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention;
Fig. 2 is signal locking disposal system electrical block diagram of the present invention.
Reference numeral name in above accompanying drawing is called:
1-torsion shaft, 2-foil gauge, 3-collector ring, 4-oscillator, 5-signal locking disposal system, 6-display instrument, 51-front end input circuit, 52-phase lock circuitry, 53-signal amplification circuit, 54-change-over circuit.
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 is primarily of to be arranged on engine shaft and as the torsion shaft 1 of electro-mechanical conversion element, display instrument 6, be arranged on the collector ring 3 in torsion shaft 1, be pasted onto the foil gauge 2 be connected in torsion shaft 1 and with collector ring 3, the oscillator 4 be connected with collector ring 3, in order to realize object of the present invention, the present invention is also provided with signal locking disposal system 5 between collector ring 3 and display instrument 6.
During work, when engine rotation torsion shaft 1 is driven, then measure the torque signal of torsion shaft 1 by the distortion of foil gauge 2, and signal is flowed to collector ring 3.The effect of collector ring 3 is drawn from the torsion shaft 1 be rotating by the lead-in wire of foil gauge 2, and the torque signal that namely foil gauge 2 collects is transferred to oscillator 4 and signal locking disposal system 5 by collector ring 3; Display instrument 6 is for showing engine torque value.Wherein, display instrument 6, torsion shaft 1, foil gauge 2, collector ring 3 and oscillator 4 all adopt existing technology to realize, and signal locking disposal system 5 is then emphasis place of the present invention as torque signal disposal system of the present invention.
As shown in Figure 2, this signal locking disposal system 5 is by front end input circuit 51, and the phase lock circuitry 52 be connected with front end input circuit 51, the signal amplification circuit 53 be connected with phase lock circuitry 52, the change-over circuit 54 be connected with signal amplification circuit 53 forms.
Described front end input circuit 51 comprises resistance R1, resistance R2, inductance L 1, inductance L 2, diode D1, diode D2, diode D3 and electric capacity C1.During connection, the P pole ground connection of described diode D1, N pole is then connected with the N pole of diode D2 after polar capacitor C1, one end of resistance R1 is connected with the N pole of diode D1, the other end is then as an input pole of circuit, one end of resistance R2 is connected with the N pole of diode D1, the other end is then connected with phase lock circuitry 52, one end of inductance L 2 is connected with the N pole of diode D1 after resistance R2, the other end is then connected with the p pole of diode D2, the N pole of described diode D2 after inductance L 1 as another input pole of circuit, P pole is connected with phase lock circuitry 52, the N pole of diode D3 is connected with the P pole of diode D2, ground connection while P pole is then connected with phase lock circuitry 52.
Phase lock circuitry 52 can carry out Phase Processing to torque signal, phase place after process is more stable, it is by field effect transistor Q1, triode VT1, triode VT2, positive pole is connected with the emitter of triode VT1 after resistance R3, the polar capacitor C2 that negative pole is then connected with the base stage of triode VT1, one end is connected with the collector of triode VT1, the resistance R4 that the other end is connected with the collector of triode VT2 after inductance L 4, one end is connected with the base stage of triode VT2, the resistance R6 that the other end is connected with signal amplification circuit 53, and one end is connected with the base stage of triode VT2 after inductance L 3, the resistance R5 of other end ground connection forms.The grid of described field effect transistor Q1 is connected with the N pole of diode D3, source electrode is connected with the base stage of triode VT2, it drains and be then connected with the collector of triode VT1, the collector of described triode VT1 is connected with the tie point of inductance L 2 with resistance R2, its base stage is then connected with signal amplification circuit 53, and the collector of described triode VT2 is respectively with the P pole of diode D3 and signal amplification circuit 53 is connected, its grounded emitter.The positive pole of described polar capacitor C2 connects outside 15V voltage.
Signal amplification circuit 53 is by amplifier P1, triode VT3, triode VT4, positive pole is connected with the base stage of triode VT1 after resistance R7, the polar capacitor C4 that negative pole is then connected with the positive pole of amplifier P1, positive pole is connected with the negative pole of amplifier P1 after resistance R8, the polar capacitor C3 that negative pole is then connected with the base stage of triode VT2 after resistance R6, positive pole is connected with the negative pole of polar capacitor C3, the electrode capacitance C5 that negative pole is connected with change-over circuit 54, one end is connected with the emitter of triode VT4, the resistance R9 that the other end is connected with the negative pole of amplifier P1, one end is connected with the base stage of triode VT4, the resistance R10 that the other end is connected with the base stage of triode VT1, and N pole is connected with the base stage of triode VT1, the voltage stabilizing diode D4 of P pole ground connection forms.The base stage of described triode VT3 is connected with the collector of triode VT2, its emitter is connected with the negative pole of polar capacitor C3, collector is connected with the base stage of triode VT1, and the collector of described triode VT4 is connected with change-over circuit 54 respectively with the output terminal of amplifier P1.
Described change-over circuit 54 is by conversion chip U, field effect transistor Q2, triode VT5, triode VT6, rejection gate A, the diode D5 that the negative pole of P pole AND OR NOT gate A is connected, N pole is connected with the IN+ pin of conversion chip U, the diode D6 that N pole is connected with the drain electrode of field effect transistor Q2, P pole is then connected with the OUT pin of conversion chip U after resistance R12, the resistance R11 that one end is connected with the base stage of triode VT5, the other end is then connected with the source electrode of field effect transistor Q2 forms.The positive pole of described rejection gate A is connected with the collector of triode VT4, output terminal is then connected with the emitter of triode VT5, the IN+ pin of described conversion chip U is connected with the output terminal of amplifier P1, its IN-pin is then connected with the negative pole of polar capacitor C5, GND pin ground connection, OUT pin is also connected with the grid of field effect transistor Q2, VCC pin connects 15V voltage, the output terminal of the base stage AND OR NOT gate A of described triode VT5 is connected, collector is connected with the base stage of triode VT6, the collector of triode VT6 is connected with the emitter of triode VT5, its emitter is then connected with the P pole of diode D6.In order to better implement the present invention, described conversion chip U is preferably LM393 type integrated chip and realizes.
As mentioned above, just well the present invention can be realized.
Claims (6)
1. an engine performance measuring phase-locking type torque sensor, primarily of torsion shaft (1), display instrument (6), be arranged on the collector ring (3) in torsion shaft (1), be pasted onto torsion shaft (1) to go up and the foil gauge (2) be connected with collector ring (3), the oscillator (4) be connected with collector ring (3) forms; It is characterized in that: between collector ring (3) and display instrument (6), be also provided with signal locking disposal system (5); Described signal locking disposal system (5) is then by front end input circuit (51), the phase lock circuitry (52) be connected with front end input circuit (51), the signal amplification circuit (53) be connected with phase lock circuitry (52), the change-over circuit (54) be connected with signal amplification circuit (53) forms.
2. a kind of engine performance measuring phase-locking type torque sensor according to claim 1, is characterized in that: described front end input circuit (51) comprises resistance R1, resistance R2, inductance L 1, inductance L 2, diode D1, diode D2, diode D3 and electric capacity C1, the P pole ground connection of described diode D1, N pole is then connected with the N pole of diode D2 after polar capacitor C1, one end of resistance R1 is connected with the N pole of diode D1, the other end is then as an input pole of circuit, one end of resistance R2 is connected with the N pole of diode D1, the other end is then connected with phase lock circuitry (52), one end of inductance L 2 is connected with the N pole of diode D1 after resistance R2, the other end is then connected with the p pole of diode D2, the N pole of described diode D2 after inductance L 1 as another input pole of circuit, P pole is connected with phase lock circuitry (52), the N pole of diode D3 is connected with the P pole of diode D2, ground connection while P pole is then connected with phase lock circuitry (52).
3. a kind of engine performance measuring phase-locking type torque sensor according to claim 2, it is characterized in that: described phase lock circuitry (52) is by field effect transistor Q1, triode VT1, triode VT2, positive pole is connected with the emitter of triode VT1 after resistance R3, the polar capacitor C2 that negative pole is then connected with the base stage of triode VT1, one end is connected with the collector of triode VT1, the resistance R4 that the other end is connected with the collector of triode VT2 after inductance L 4, one end is connected with the base stage of triode VT2, the resistance R6 that the other end is connected with signal amplification circuit (53), and one end is connected with the base stage of triode VT2 after inductance L 3, the resistance R5 of other end ground connection forms, the grid of described field effect transistor Q1 is connected with the N pole of diode D3, source electrode is connected with the base stage of triode VT2, it drains and be then connected with the collector of triode VT1, the collector of described triode VT1 is connected with the tie point of inductance L 2 with resistance R2, its base stage is then connected with signal amplification circuit (53), and the collector of described triode VT2 is respectively with the P pole of diode D3 and signal amplification circuit (53) is connected, its grounded emitter.
4. a kind of engine performance measuring phase-locking type torque sensor according to claim 3, it is characterized in that: described signal amplification circuit (53) is by amplifier P1, triode VT3, triode VT4, positive pole is connected with the base stage of triode VT1 after resistance R7, the polar capacitor C4 that negative pole is then connected with the positive pole of amplifier P1, positive pole is connected with the negative pole of amplifier P1 after resistance R8, the polar capacitor C3 that negative pole is then connected with the base stage of triode VT2 after resistance R6, positive pole is connected with the negative pole of polar capacitor C3, the electrode capacitance C5 that negative pole is connected with change-over circuit (54), one end is connected with the emitter of triode VT4, the resistance R9 that the other end is connected with the negative pole of amplifier P1, one end is connected with the base stage of triode VT4, the resistance R10 that the other end is connected with the base stage of triode VT1, and N pole is connected with the base stage of triode VT1, the voltage stabilizing diode D4 of P pole ground connection forms, the base stage of described triode VT3 is connected with the collector of triode VT2, its emitter is connected with the negative pole of polar capacitor C3, collector is connected with the base stage of triode VT1, and the collector of described triode VT4 is connected with change-over circuit (54) respectively with the output terminal of amplifier P1.
5. a kind of engine performance measuring phase-locking type torque sensor according to claim 4, it is characterized in that: described change-over circuit (54) is by conversion chip U, field effect transistor Q2, triode VT5, triode VT6, rejection gate A, the negative pole of P pole AND OR NOT gate A is connected, the diode D5 that N pole is connected with the IN+ pin of conversion chip U, N pole is connected with the drain electrode of field effect transistor Q2, the diode D6 that P pole is then connected with the OUT pin of conversion chip U after resistance R12, one end is connected with the base stage of triode VT5, the resistance R11 that the other end is then connected with the source electrode of field effect transistor Q2 forms, the positive pole of described rejection gate A is connected with the collector of triode VT4, output terminal is then connected with the emitter of triode VT5, the IN+ pin of described conversion chip U is connected with the output terminal of amplifier P1, its IN-pin is then connected with the negative pole of polar capacitor C5, GND pin ground connection, OUT pin is also connected with the grid of field effect transistor Q2, VCC pin connects 15V voltage, the output terminal of the base stage AND OR NOT gate A of described triode VT5 is connected, collector is connected with the base stage of triode VT6, the collector of triode VT6 is connected with the emitter of triode VT5, its emitter is then connected with the P pole of diode D6.
6. a kind of engine performance measuring phase-locking type torque sensor according to claim 5, is characterized in that: described conversion chip U is LM393 type integrated chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510202636.9A CN104864992A (en) | 2015-04-25 | 2015-04-25 | Phase-locked type torque sensor for engine performance test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510202636.9A CN104864992A (en) | 2015-04-25 | 2015-04-25 | Phase-locked type torque sensor for engine performance test |
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| CN104864992A true CN104864992A (en) | 2015-08-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881706A (en) * | 2010-07-05 | 2010-11-10 | 深圳迈瑞生物医疗电子股份有限公司 | Sampling device and method |
| CN102628717A (en) * | 2012-04-20 | 2012-08-08 | 北京必创科技有限公司 | Strain type wireless sensor |
| CN102928141A (en) * | 2012-11-07 | 2013-02-13 | 沈阳创达技术交易市场有限公司 | Metal resistance strain piece type torque transducer |
| CN204007962U (en) * | 2014-07-15 | 2014-12-10 | 中国第一汽车股份有限公司 | A kind of packoff of Novel camshaft torque measurement web member |
| CN204142757U (en) * | 2014-10-27 | 2015-02-04 | 北京麦克思拓测控科技有限公司 | Rated rotational frequency device |
-
2015
- 2015-04-25 CN CN201510202636.9A patent/CN104864992A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881706A (en) * | 2010-07-05 | 2010-11-10 | 深圳迈瑞生物医疗电子股份有限公司 | Sampling device and method |
| CN102628717A (en) * | 2012-04-20 | 2012-08-08 | 北京必创科技有限公司 | Strain type wireless sensor |
| CN102928141A (en) * | 2012-11-07 | 2013-02-13 | 沈阳创达技术交易市场有限公司 | Metal resistance strain piece type torque transducer |
| CN204007962U (en) * | 2014-07-15 | 2014-12-10 | 中国第一汽车股份有限公司 | A kind of packoff of Novel camshaft torque measurement web member |
| CN204142757U (en) * | 2014-10-27 | 2015-02-04 | 北京麦克思拓测控科技有限公司 | Rated rotational frequency device |
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