CN104864993A - Torque sensor capable of carrying out efficient filtering processing - Google Patents
Torque sensor capable of carrying out efficient filtering processing Download PDFInfo
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- CN104864993A CN104864993A CN201510202715.XA CN201510202715A CN104864993A CN 104864993 A CN104864993 A CN 104864993A CN 201510202715 A CN201510202715 A CN 201510202715A CN 104864993 A CN104864993 A CN 104864993A
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Abstract
The invention discloses a torque sensor capable of carrying out efficient filtering processing. 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), an oscillator (4) connected with the collector ring (3), a coupling circuit (7) connected with the displayer (6), and a signal phase-lock processing system (5) connected with the coupling circuit (7). The torque sensor is characterized in that a filter circuit (8) is arranged between the signal phase-lock processing system (5) and the collector ring (3). The torque sensor can filter interference signals generated by the equipment, thereby preventing the torque sensor from being influenced by the interference signals, and improving the stability.
Description
Technical field
The present invention relates to a kind of sensor, specifically refer to a kind of torque sensor of efficient filtering process.
Background technology
Along with the fast development of modern science and technology, torque measurement techniques has become the new branch of measuring technology.The application of torque measurement is more and more extensive, arrive greatly aircraft, as oceangoing ship, drilling well, generating set and metallurgical and mining equipment etc., littlely arrive micromotor, household electrical appliance and clock and watch etc.Torque measurement is the requisite contents such as various mechanical new product development, quality inspection, optimal control, monitoring of working condition and fault diagnosis.Torque measurement accurately to shorten modern machinery and equipment lead time, improve equipment performance, reduce development cost there is important effect.
All more or less to produce various undesired signal in the process of equipment work, the impact of signal and traditional torque sensor is easy to when measuring the moment of torsion of equipment to be interfered, make the torque signal detected by it occur very large error, how to avoid this situation to be then that solution is badly in need of in institute at present.
Summary of the invention
The object of the invention is to overcome the defect that traditional torque sensor is easily interfered, a kind of torque sensor of efficient filtering process is provided.
Object of the present invention is achieved through the following technical solutions: a kind of torque sensor of efficient filtering process, 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, the coupled circuit be connected with display instrument, the signal locking disposal system be connected with coupled circuit, is also provided with filtering circuit between signal locking disposal system and collector ring, described filtered electrical routing amplifier P2, amplifier P3, triode VT9, triode VT10, positive pole is connected with the positive pole of amplifier 2, negative pole then inputs the polar capacitor C10 of pole after resistance R20 as circuit one, P pole is connected with the positive pole of amplifier P2, N pole is then as the diode D10 of another input pole of circuit, one end is connected with the N pole of diode D10, the resistance R21 of other end ground connection, one end is connected with the negative pole of polarity C10, the resistance R22 that the other end is then connected with the base stage of triode VT10, positive pole is connected with the N pole of diode D10, the polar capacitor C11 that negative pole is then connected with the positive pole of amplifier P3, positive pole is connected with the emitter of triode VT9, the polar capacitor C12 that negative pole is then connected with the emitter of triode VT10 after resistance R23 forms, minus earth, its output terminal of described amplifier P2 are then connected with the negative pole of polar capacitor C11, the base stage of triode VT9 is connected with the output terminal of amplifier P2, its collector is then connected with the negative pole of amplifier P3, the emitter of described triode VT10 is connected with the base stage of triode VT9, grounded collector, and the output terminal of described amplifier P3 is then connected with the negative pole of polar capacitor C12.
Further, described coupled circuit is by triode VT7, triode VT8, unidirectional thyristor D9, N pole is connected with the emitter of triode VT8 after resistance 18, the diode D7 that P pole is then connected with the emitter of triode VT7 after resistance R13, negative pole is connected with the N pole of diode D7 after resistance R14, positive pole is then as the polar capacitor C6 of an input pole of circuit, minus earth, the polar capacitor C7 that positive pole is then connected with the base stage of triode VT7 after resistance R15, P pole is ground connection after resistance R16, the diode D8 that N pole is then connected with the negative pole of polar capacitor C6, negative pole is connected with the N pole of diode D8, the polar capacitor C9 that positive pole is then connected with the base stage of triode VT8, one end is connected with the positive pole of polar capacitor C7, the resistance R17 that the other end is then connected with the control pole of unidirectional thyristor D9 after resistance R19, and form with the polar capacitor C8 that resistance R17 is in parallel, the grounded collector of described triode VT7, ground connection while the collector of triode VT8 is connected with the P pole of unidirectional thyristor D9.
Described signal locking disposal system is 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.
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, and amplifier P2 and amplifier P3 is SF356 type fortune amplifier.
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 suppress the attenuation of torque signal in processing procedure by the effect of coupled circuit, torque sensor can be exported more by force, more stable signal.
(3) the present invention can filter out the undesired signal that equipment produces, and avoids torque sensor to be interfered the impact of signal, improves its stability.
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;
Fig. 3 is coupled circuit configuration schematic diagram of the present invention;
Fig. 4 is filter circuit construction schematic 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, 7-coupled circuit, 8-filtering circuit, 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 in equipment under test rotating 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, the coupled circuit 7 be connected with display instrument 6, the signal locking disposal system 5 be connected with coupled circuit 7.In order to realize object of the present invention, the present invention is also provided with filtering circuit 8 between signal locking disposal system 5 and collector ring 3.
When equipment under test rotates, torsion shaft 1 is driven, then measures 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 filtering circuit 8 by collector ring 3.Display instrument 6 is for showing the torque value of equipment under test.And signal locking disposal system 5 is for carrying out Phase Processing to torque signal, coupled circuit 7 can suppress the decay of torque signal, and the signal that torque sensor is exported is more stable.Filtering circuit 8 for filtering out the undesired signal that equipment produces, thus improves the stability of torque sensor.
Wherein, display instrument 6, torsion shaft 1, foil gauge 2, collector ring 3 and oscillator 4 all adopt existing technology to realize.
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.
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 shown in Figure 3, coupled circuit 7 is by triode VT7, triode VT8, unidirectional thyristor D9, N pole is connected with the emitter of triode VT8 after resistance 18, the diode D7 that P pole is then connected with the emitter of triode VT7 after resistance R13, negative pole is connected with the N pole of diode D7 after resistance R14, positive pole is then as the polar capacitor C6 of an input pole of circuit, minus earth, the polar capacitor C7 that positive pole is then connected with the base stage of triode VT7 after resistance R15, P pole is ground connection after resistance R16, the diode D8 that N pole is then connected with the negative pole of polar capacitor C6, negative pole is connected with the N pole of diode D8, the polar capacitor C9 that positive pole is then connected with the base stage of triode VT8, one end is connected with the positive pole of polar capacitor C7, the resistance R17 that the other end is then connected with the control pole of unidirectional thyristor D9 after resistance R19, and form with the polar capacitor C8 that resistance R17 is in parallel.The grounded collector of described triode VT7, ground connection while the collector of triode VT8 is connected with the P pole of unidirectional thyristor D9.The collector of described triode VT7 then as another input pole of circuit, the tie point of resistance R17 and resistance R19 together with the N pole of unidirectional thyristor D9 as the output terminal of circuit.In order to better implement the present invention, this triode VT7 preferentially elects PNP type triode as, and triode VT8 is then preferably NPN type triode and realizes.
As shown in Figure 4, filtering circuit 8 is by amplifier P2, amplifier P3, triode VT9, triode VT10, positive pole is connected with the positive pole of amplifier 2, negative pole then inputs the polar capacitor C10 of pole after resistance R20 as circuit one, P pole is connected with the positive pole of amplifier P2, N pole is then as the diode D10 of another input pole of circuit, one end is connected with the N pole of diode D10, the resistance R21 of other end ground connection, one end is connected with the negative pole of polarity C10, the resistance R22 that the other end is then connected with the base stage of triode VT10, positive pole is connected with the N pole of diode D10, the polar capacitor C11 that negative pole is then connected with the positive pole of amplifier P3, positive pole is connected with the emitter of triode VT9, the polar capacitor C12 that negative pole is then connected with the emitter of triode VT10 after resistance R23 forms.Minus earth, its output terminal of described amplifier P2 are then connected with the negative pole of polar capacitor C11, the base stage of triode VT9 is connected with the output terminal of amplifier P2, its collector is then connected with the negative pole of amplifier P3, the emitter of described triode VT10 is connected with the base stage of triode VT9, grounded collector, and the output terminal of described amplifier P3 is then connected with the negative pole of polar capacitor C12.The output terminal of described amplifier P3 together with the negative pole of polar capacitor C12 as the output terminal of circuit.In order to better implement the present invention, this amplifier P2 and amplifier P3 is preferably SF356 type fortune amplifier and realizes.
As mentioned above, just well the present invention can be realized.
Claims (9)
1. the torque sensor of an efficient filtering process, 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), the coupled circuit (7) be connected with display instrument (6), the signal locking disposal system (5) be connected with coupled circuit (7) forms, it is characterized in that: between signal locking disposal system (5) and collector ring (3), be also provided with filtering circuit (8), described filtering circuit (8) is by amplifier P2, amplifier P3, triode VT9, triode VT10, positive pole is connected with the positive pole of amplifier 2, negative pole then inputs the polar capacitor C10 of pole after resistance R20 as circuit one, P pole is connected with the positive pole of amplifier P2, N pole is then as the diode D10 of another input pole of circuit, one end is connected with the N pole of diode D10, the resistance R21 of other end ground connection, one end is connected with the negative pole of polarity C10, the resistance R22 that the other end is then connected with the base stage of triode VT10, positive pole is connected with the N pole of diode D10, the polar capacitor C11 that negative pole is then connected with the positive pole of amplifier P3, positive pole is connected with the emitter of triode VT9, the polar capacitor C12 that negative pole is then connected with the emitter of triode VT10 after resistance R23 forms, minus earth, its output terminal of described amplifier P2 are then connected with the negative pole of polar capacitor C11, the base stage of triode VT9 is connected with the output terminal of amplifier P2, its collector is then connected with the negative pole of amplifier P3, the emitter of described triode VT10 is connected with the base stage of triode VT9, grounded collector, and the output terminal of described amplifier P3 is then connected with the negative pole of polar capacitor C12.
2. the torque sensor of a kind of efficient filtering process according to claim 1, it is characterized in that: described coupled circuit (7) is by triode VT7, triode VT8, unidirectional thyristor D9, N pole is connected with the emitter of triode VT8 after resistance 18, the diode D7 that P pole is then connected with the emitter of triode VT7 after resistance R13, negative pole is connected with the N pole of diode D7 after resistance R14, positive pole is then as the polar capacitor C6 of an input pole of circuit, minus earth, the polar capacitor C7 that positive pole is then connected with the base stage of triode VT7 after resistance R15, P pole is ground connection after resistance R16, the diode D8 that N pole is then connected with the negative pole of polar capacitor C6, negative pole is connected with the N pole of diode D8, the polar capacitor C9 that positive pole is then connected with the base stage of triode VT8, one end is connected with the positive pole of polar capacitor C7, the resistance R17 that the other end is then connected with the control pole of unidirectional thyristor D9 after resistance R19, and form with the polar capacitor C8 that resistance R17 is in parallel, the grounded collector of described triode VT7, ground connection while the collector of triode VT8 is connected with the P pole of unidirectional thyristor D9.
3. the torque sensor of a kind of efficient filtering process according to claim 2, it is characterized in that: described signal locking disposal system (5) is 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.
4. the torque sensor of a kind of efficient filtering process according to claim 3, 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).
5. the torque sensor of a kind of efficient filtering process according to claim 4, 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.
6. the torque sensor of a kind of efficient filtering process according to claim 5, 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.
7. the torque sensor of a kind of efficient filtering process according to claim 6, 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.
8. the torque sensor of a kind of efficient filtering process according to claim 7, is characterized in that: described conversion chip U is LM393 type integrated chip.
9. the torque sensor of a kind of efficient filtering process according to any one of claim 1 ~ 7, is characterized in that: described amplifier P2 and amplifier P3 is SF356 type fortune amplifier.
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| 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 |
| CN203132750U (en) * | 2013-02-23 | 2013-08-14 | 朱牧之 | Wheel-type shaft end torque sensor |
| 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 |
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