CN204964084U - Digital strain type torque sensor based on frequency distortion correction circuit - Google Patents
Digital strain type torque sensor based on frequency distortion correction circuit Download PDFInfo
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- CN204964084U CN204964084U CN201520657670.0U CN201520657670U CN204964084U CN 204964084 U CN204964084 U CN 204964084U CN 201520657670 U CN201520657670 U CN 201520657670U CN 204964084 U CN204964084 U CN 204964084U
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Abstract
The utility model discloses a digital strain type torque sensor based on frequency distortion correction circuit, including fluted disc U, photoelectric switch S, stator system, electrical resolver T1, electrical resolver T2 to and rotor system, the stator system is by DCDC unit, the power amplifier P1 who is connected with the DCDC unit, the ARM microcontroller who is connected with power amplifier P1, the RS485 communication interface who is connected with ARM microcontroller respectively, frequency distortion correction circuit and rotational speed signal conditioning unit component, the utility model discloses a signal conversion means, it can alternate into frequency pulse signal to voltage signal, its pulse signal's who alternaties difference in frequency when at different work condition to make it still can keep fine suitability under different work condition. The utility model discloses can rectify the frequency signal who appears the distortion in the processing procedure, thereby ensure the utility model discloses output signal's precision.
Description
Technical field
The utility model relates to sensor technical field, specifically refers to a kind of digitizing strain-type torque sensor based on frequency distortion correcting circuit.
Background technology
In existing strain-type torque sensor technology, the electric signal usually adopting analog circuitry processes foil gauge to export, is converted into proportional linear analogue amount output signal, as voltage, electric current or frequency pulse signal.But easily to there is the existing picture of distortion in simulating signal, this just makes the simulating signal detected normally use after treatment.
Utility model content
The purpose of this utility model is to overcome existing its simulating signal of strain-type torque sensor and is easily occurring after treatment the defect of distortion providing a kind of digitizing strain-type torque sensor based on frequency distortion correcting circuit.
The purpose of this utility model is achieved through the following technical solutions: a kind of digitizing strain-type torque sensor based on frequency distortion correcting circuit, and it comprises fluted disc U, optoelectronic switch S, stator system, rotary transformer T1, rotary transformer T2, and rotor-support-foundation system; One end of described optoelectronic switch S is connected with fluted disc U, the other end is then connected with stator system, the former limit of rotary transformer T1 is connected with stator system, its secondary is then connected with rotor-support-foundation system, and the former limit of rotary transformer T2 is connected with rotor-support-foundation system, its secondary is then connected with stator system.
Further, described rotor-support-foundation system by rectifier K, the strain resistor electric bridge be connected with rectifier K, the signal conversion unit be connected with strain resistor electric bridge, and simultaneously forming with the signal amplifier P2 that rectifier K is connected with signal conversion unit; Described rectifier K is also connected with the secondary of rotary transformer T1, and signal amplifier P2 is also connected with the former limit of rotary transformer T2.
Described signal conversion unit is by amplifier P3, Sheffer stroke gate A1, Sheffer stroke gate A2, the diode D1 that N pole is connected with the positive pole of amplifier P3, P pole then forms the input end of this signal conversion unit, the electric capacity C1 that positive pole is connected with the P pole of diode D1, negative pole is then connected with the negative pole of amplifier P3 after potentiometer R2, the resistance R1 be in parallel with electric capacity C1, and the diode D2 that N pole is connected with the negative pole of amplifier P3, P pole is then connected with the positive pole of Sheffer stroke gate A1 after polarity-inverting amplifier A3 forms; The negative pole of described electric capacity C1 is connected with the control end of potentiometer R2; The negative pole of described Sheffer stroke gate A2 is connected with the output terminal of amplifier P3, and its positive pole is then connected with the output terminal of Sheffer stroke gate A1, and its output terminal forms the output terminal of this signal conversion unit while being then connected with the negative pole of Sheffer stroke gate A1.
Described stator system is by DC/DC unit, the power amplifier P1 be connected with DC/DC unit, the ARM microcontroller be connected with power amplifier P1, the RS485 communication interface be connected with ARM microcontroller respectively, frequency distortion correcting circuit and tach signal conditioning unit form; Described power amplifier P1 is also connected with the former limit of rotary transformer T1, and signal condition unit is also connected with the secondary of rotary transformer T2, and tach signal conditioning unit is also connected with optoelectronic switch S-phase.
Described frequency distortion correcting circuit is by triode VT1, triode VT2, triode VT3, one end is connected with the base stage of triode VT1, the other end then forms the resistance R3 of this frequency distortion correcting circuit input end, negative pole is connected with the collector of triode VT1, the positive pole then electric capacity C2 of ground connection after resistance R5 and resistance R4 in turn, one end is connected with the emitter of triode VT1, the resistance R6 of other end ground connection, one end is connected with the positive pole of electric capacity C2, the other end is the resistance R7 of ground connection after resistance R8 then, one end is connected with the base stage of triode VT2, the resistance R9 that the other end is then connected with the collector of triode VT3, be serially connected in the electric capacity C3 between the collector of triode VT3 and base stage, P pole is connected with the collector of triode VT3, the diode D3 of N pole ground connection forms, the base stage of described triode VT1 is connected with the tie point of resistance R4 with resistance R5, and its emitter is then connected with the base stage of triode VT3, and its collector is then connected with the collector of triode VT2, the grounded emitter of described triode VT2, its base stage is then connected with the tie point of resistance R8 with resistance R7, the grounded emitter of described triode VT3, its collector then forms the output terminal of this frequency distortion correcting circuit.
Described amplifier P3 is LF356BI type operational amplifier.
The utility model comparatively prior art is compared, and has the following advantages and beneficial effect:
(1) RS485 communication interface of the present utility model can directly be connected with external unit, without the need to using secondary instrument.
(2) the utility model adopts ARM microcontroller it can carry out digitized processing to measuring the signal exported, and convenient calibration, demarcates and parameter adjustment, can also improve antijamming capability and transmission range that measurement data exports simultaneously.
(3) the utility model adopts signal conversion unit, it can be transformed into frequency pulse signal voltage signal, when the frequency of the pulse signal that it converts is different when different operating mode, thus make it under different operating mode, still can keep good applicability.
(4) the utility model to occurring that in processing procedure the frequency signal of distortion corrects, thus can guarantee the precision that the utility model outputs signal.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model.
Fig. 2 is signal conversion unit circuit structure diagram of the present utility model.
Fig. 3 is frequency distortion correction circuit structure figure 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 digitizing strain-type torque sensor based on frequency distortion correcting circuit of the present utility model, by fluted disc U, optoelectronic switch S, stator system, rotary transformer T1, rotary transformer T2, and rotor-support-foundation system composition.This fluted disc U is fixed on the rotor of sensor, and one end of optoelectronic switch S is connected with fluted disc U, the other end is then connected with stator system.Meanwhile, the former limit of rotary transformer T1 is connected with stator system, its secondary is then connected with rotor-support-foundation system, and the former limit of rotary transformer T2 is connected with rotor-support-foundation system, its secondary is then connected with stator system.Optoelectronic switch S coordinates fluted disc U can the speed that rotates of detection rotor, and exports corresponding frequency pulse signal to stator system.
In order to can better process the frequency pulse signal that optoelectronic switch S transports, this stator system is provided with DC/DC unit, the power amplifier P1 be connected with DC/DC unit, the ARM microcontroller be connected with power amplifier P1, the RS485 communication interface be connected with ARM microcontroller respectively, frequency distortion correcting circuit and tach signal conditioning unit.Meanwhile, this power amplifier P1 is also connected with the former limit of rotary transformer T1, and frequency distortion correcting circuit is also connected with the secondary of rotary transformer T2, and tach signal conditioning unit is also connected with optoelectronic switch S-phase.Optoelectronic switch S by fluted disc U detection rotor rotational speed, and exports corresponding frequency pulse signal, and this frequency pulse signal flows to ARM microcontroller after tach signal conditioning unit.
External power source can for the voltage of stator system and rotor-support-foundation system by being converted to after DC/DC unit.ARM microcontroller produces 400Hz pulse signal by the PWM unit of its inside, then amplifies rear drive rotary transformer T1 through power amplifier P1, and is transferred to rotor-support-foundation system by rotary transformer T1, is processed by rotor-support-foundation system.
In order to better implement the utility model, this rotor-support-foundation system is by rectifier K, the strain resistor electric bridge be connected with rectifier K, the signal conversion unit be connected with strain resistor electric bridge, and form with the signal amplifier P2 that rectifier K is connected with signal conversion unit simultaneously.Meanwhile, rectifier K is also connected with the secondary of rotary transformer T1, and signal amplifier P2 is also connected with the former limit of rotary transformer T2.
Carry from rotary transformer T1 the signal of coming after rectifier K rectifying and voltage-stabilizing, rotor-support-foundation system working power can be supplied to.Meanwhile, the voltage signal that strain resistor electric bridge produces can be transformed to the frequency pulse signal of 10KHz by signal conversion unit.
As shown in Figure 2, it comprises amplifier P3 to the structure of this signal conversion unit, Sheffer stroke gate A1, Sheffer stroke gate A2, resistance R1, potentiometer R2, electric capacity C1, diode D1, diode D2 and polarity-inverting amplifier A3.
Wherein, the N pole of diode D2 is connected with the negative pole of amplifier P3, its P pole is then connected with the positive pole of Sheffer stroke gate A1 after polarity-inverting amplifier A3.The negative pole of Sheffer stroke gate A2 is connected with the output terminal of amplifier P3, and its positive pole is then connected with the output terminal of Sheffer stroke gate A1, and its output terminal forms the output terminal of this signal conversion unit while being then connected with the negative pole of Sheffer stroke gate A1.Structure diodes D2 thus, polarity-inverting amplifier A3, amplifier P3, Sheffer stroke gate A1 and Sheffer stroke gate A2 then form a signal converter, and after voltage signal input is come in, this converter is then converted into frequency pulse signal voltage signal.
In addition, the input end that the N pole of diode D1 is connected with the positive pole of amplifier P3, its P pole then forms this signal conversion unit, the positive pole of electric capacity C1 is connected with the P pole of diode D1, its negative pole is then connected with the negative pole of amplifier P3 after potentiometer R2, and resistance R1 is then in parallel with electric capacity C1.The negative pole of described electric capacity C1 is connected with the control end of potentiometer R2.In order to reach better implementation result, this amplifier P3 preferentially selects LF356BI type operational amplifier.
Meanwhile, after frequency pulse signal after conversion is amplified by signal amplifier P2, flow to frequency distortion correcting circuit by rotary transformer T2, then by frequency distortion correcting circuit, after correcting, ARM microcontroller is transferred to the frequency pulse signal of distortion in processing procedure.
As shown in Figure 3, it comprises triode VT1 to the structure of this frequency distortion correcting circuit, and triode VT2, triode VT3, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, diode D3, electric capacity C2 and electric capacity C3 form.
One end of resistance R3 is connected with the base stage of triode VT1, its other end then forms this frequency distortion correcting circuit input end, the negative pole of electric capacity C2 is connected with the collector of triode VT1, its positive pole then ground connection after resistance R5 and resistance R4 in turn, one end of resistance R6 is connected with the emitter of triode VT1, its other end ground connection, one end of resistance R7 is connected with the positive pole of electric capacity C2, its other end is ground connection after resistance R8 then, one end of resistance R9 is connected with the base stage of triode VT2, its other end is then connected with the collector of triode VT3, between the collector that electric capacity C3 is then serially connected in triode VT3 and base stage, the P pole of diode D3 is connected with the collector of triode VT3, its N pole ground connection.
Meanwhile, the base stage of described triode VT1 is connected with the tie point of resistance R4 with resistance R5, and its emitter is then connected with the base stage of triode VT3, and its collector is then connected with the collector of triode VT2.The grounded emitter of described triode VT2, its base stage is then connected with the tie point of resistance R8 with resistance R7.The grounded emitter of described triode VT3, its collector then forms the output terminal of this frequency distortion correcting circuit.
At this moment, ARM microcontroller is to gathering after the tach signal transmitted from pulse duration frequency signal and the optoelectronic switch S of rotor carries out the process such as digital filtering, linear gauging, digital compensation, external unit is exported to again by RS485 communication interface, and without the need to re-using secondary instrument.This RS485 communication interface can receive the data corresponding to torque and rotating speed after calibration, also can send its inner parameter of modifying of order to torque sensor, comprise sample frequency, filter factor, linear gauging parameter and messaging parameter etc.And because ARM microcontroller can the digitized processing of the communication of the amount of realization and signal, therefore factory calibration and demarcate communication interface all can be adopted to carry out at a distance, does not need to adopt human contact to carry out the parameter of Circuit tuning, resistance.
As mentioned above, just well the utility model can be implemented.
Claims (4)
1., based on a digitizing strain-type torque sensor for frequency distortion correcting circuit, comprise fluted disc U, optoelectronic switch S, stator system, rotary transformer T1, rotary transformer T2, and rotor-support-foundation system, one end of described optoelectronic switch S is connected with fluted disc U, the other end is then connected with stator system, the former limit of rotary transformer T1 is connected with stator system, its secondary is then connected with rotor-support-foundation system, and the former limit of rotary transformer T2 is connected with rotor-support-foundation system, its secondary is then connected with stator system, it is characterized in that, described stator system is by DC/DC unit, the power amplifier P1 be connected with DC/DC unit, the ARM microcontroller be connected with power amplifier P1, the RS485 communication interface be connected with ARM microcontroller respectively, frequency distortion correcting circuit and tach signal conditioning unit form, described power amplifier P1 is also connected with the former limit of rotary transformer T1, and frequency distortion correcting circuit is also connected with the secondary of rotary transformer T2, and tach signal conditioning unit is also connected with optoelectronic switch S-phase, described frequency distortion correcting circuit is by triode VT1, triode VT2, triode VT3, one end is connected with the base stage of triode VT1, the other end then forms the resistance R3 of this frequency distortion correcting circuit input end, negative pole is connected with the collector of triode VT1, the positive pole then electric capacity C2 of ground connection after resistance R5 and resistance R4 in turn, one end is connected with the emitter of triode VT1, the resistance R6 of other end ground connection, one end is connected with the positive pole of electric capacity C2, the other end is the resistance R7 of ground connection after resistance R8 then, one end is connected with the base stage of triode VT2, the resistance R9 that the other end is then connected with the collector of triode VT3, be serially connected in the electric capacity C3 between the collector of triode VT3 and base stage, P pole is connected with the collector of triode VT3, the diode D3 of N pole ground connection forms, the base stage of described triode VT1 is connected with the tie point of resistance R4 with resistance R5, and its emitter is then connected with the base stage of triode VT3, and its collector is then connected with the collector of triode VT2, the grounded emitter of described triode VT2, its base stage is then connected with the tie point of resistance R8 with resistance R7, the grounded emitter of described triode VT3, its collector then forms the output terminal of this frequency distortion correcting circuit.
2. a kind of digitizing strain-type torque sensor based on frequency distortion correcting circuit according to claim 1, it is characterized in that: described rotor-support-foundation system is by rectifier K, the strain resistor electric bridge be connected with rectifier K, the signal conversion unit be connected with strain resistor electric bridge, and form with the signal amplifier P2 that rectifier K is connected with signal conversion unit simultaneously; Described rectifier K is also connected with the secondary of rotary transformer T1, and signal amplifier P2 is also connected with the former limit of rotary transformer T2.
3. a kind of digitizing strain-type torque sensor based on frequency distortion correcting circuit according to claim 2, it is characterized in that: described signal conversion unit is by amplifier P3, Sheffer stroke gate A1, Sheffer stroke gate A2, N pole is connected with the positive pole of amplifier P3, P pole then forms the diode D1 of the input end of this signal conversion unit, positive pole is connected with the P pole of diode D1, the electric capacity C1 that negative pole is then connected with the negative pole of amplifier P3 after potentiometer R2, the resistance R1 be in parallel with electric capacity C1, and N pole is connected with the negative pole of amplifier P3, the diode D2 that P pole is then connected with the positive pole of Sheffer stroke gate A1 after polarity-inverting amplifier A3 forms, the negative pole of described electric capacity C1 is connected with the control end of potentiometer R2, the negative pole of described Sheffer stroke gate A2 is connected with the output terminal of amplifier P3, and its positive pole is then connected with the output terminal of Sheffer stroke gate A1, and its output terminal forms the output terminal of this signal conversion unit while being then connected with the negative pole of Sheffer stroke gate A1.
4. a kind of digitizing strain-type torque sensor based on frequency distortion correcting circuit according to claim 3, is characterized in that: described amplifier P3 is LF356BI type operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520657670.0U CN204964084U (en) | 2015-08-28 | 2015-08-28 | Digital strain type torque sensor based on frequency distortion correction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520657670.0U CN204964084U (en) | 2015-08-28 | 2015-08-28 | Digital strain type torque sensor based on frequency distortion correction circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204964084U true CN204964084U (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520657670.0U Expired - Fee Related CN204964084U (en) | 2015-08-28 | 2015-08-28 | Digital strain type torque sensor based on frequency distortion correction circuit |
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| CN (1) | CN204964084U (en) |
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2015
- 2015-08-28 CN CN201520657670.0U patent/CN204964084U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20160828 |
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| CF01 | Termination of patent right due to non-payment of annual fee |