CN209218062U - A kind of sensor signal conversion circuit - Google Patents
A kind of sensor signal conversion circuit Download PDFInfo
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- CN209218062U CN209218062U CN201822190326.1U CN201822190326U CN209218062U CN 209218062 U CN209218062 U CN 209218062U CN 201822190326 U CN201822190326 U CN 201822190326U CN 209218062 U CN209218062 U CN 209218062U
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Abstract
The utility model discloses a kind of sensor signal conversion circuits, including signal conversion module, Voltage to current transducer module and bias-adjusted module；The signal conversion module is connected with the Voltage to current transducer module, and the output end of the bias-adjusted module is connected with the signal end of the Voltage to current transducer module；The signal conversion module receives the square-wave signal of different duty and handles output d. c. voltage signal；Bias voltage after adjusting is transmitted to the Voltage to current transducer module by the bias-adjusted module；The Voltage to current transducer module receives the d. c. voltage signal and the bias voltage, and the d. c. voltage signal is converted into current signal output.The square-wave signal of the different duty received is converted into d. c. voltage signal by signal conversion module by the utility model, d. c. voltage signal is converted into required current signal by Voltage to current transducer module and bias-adjusted module, and the utility model can be by the preferable transformation completed between square-wave signal and current signal.
Description
Technical field
The utility model relates to signal switch technology field more particularly to a kind of sensor signal conversion circuits.
Background technique
Existing sensor is transmitted to single-chip microcontroller after collecting signal, and what single-chip microcontroller exported after treatment is different duties
The square-wave signal of the square-wave signal of ratio, the different duty of single-chip microcontroller output generally requires to use after treatment, existing letter
Number conversion circuit cannot preferably will treated that sensor signal is converted into current signal by single-chip microcontroller.
Utility model content
The utility model embodiment provides a kind of sensor signal conversion circuit, it is intended to which solving in the prior art cannot be compared with
It is good will by single-chip microcontroller treated sensor signal is converted into current signal the problem of.
The utility model embodiment provides a kind of sensor signal conversion circuit, including signal conversion module, voltage electricity
Flow conversion module and bias-adjusted module；
The signal conversion module is connected with the Voltage to current transducer module, the output end of the bias-adjusted module with
The signal end of the Voltage to current transducer module is connected；
The signal conversion module receives the square-wave signal of different duty and handles output d. c. voltage signal；It is described inclined
It sets adjustment module and the bias voltage after adjusting is transmitted to the Voltage to current transducer module；The Voltage to current transducer module connects
The d. c. voltage signal and the bias voltage are received, the d. c. voltage signal is converted into current signal output.
In one embodiment, the signal conversion module includes signal conversion unit and the first signal amplification unit；
The input terminal of the signal conversion unit is the first input end of the signal conversion module, and the signal conversion is single
The output end of member is connected with the first input end of first signal amplification unit, and the second of first signal amplification unit is defeated
Enter the second input terminal that end is the signal conversion module, the output end of first signal amplification unit is signal conversion
The output end of module；
The square-wave signal or the voltage signal are converted into the d. c. voltage signal, institute by the signal conversion unit
It states the first signal amplification unit and exports the d. c. voltage signal after amplification.
In one embodiment, the signal conversion unit includes resistance R1, resistance R2, capacitor C1 and capacitor C2；
The first end of the resistance R1 be the signal conversion unit input terminal, the second end of the resistance R1 respectively with
The first end of the resistance R2 and the first end of the capacitor C1 connect altogether, and the of the second end of the resistance R2 and the capacitor C2
One end connects the output end to form the signal conversion unit altogether, and the second end of the second end of the capacitor C2 and the capacitor C1 are total
Ground connection.
In one embodiment, first signal amplification unit includes resistance R3, resistance R4 and the first operational amplifier；
The non-inverting input terminal of first operational amplifier is the first input end of first signal amplification unit, described
The voltage input end of first operational amplifier is the second input terminal of first signal amplification unit, first operation amplifier
The second end of the output end of device and the resistance R4 connect the output end to form first signal amplification unit, first fortune altogether
It calculates first end of the inverting input terminal of amplifier respectively with the first end of the resistance R3 and the resistance R4 to connect altogether, the resistance
The second end of R3 is grounded.
In one embodiment, the Voltage to current transducer module includes impedance converter unit and Voltage to current transducer list
Member；
The first input end of the impedance converter unit is the first input end of the Voltage to current transducer module, the resistance
Second input terminal of anti-converter unit and the second input terminal of the voltage current conversion unit are connected in the voltage and current altogether and turn
The second input terminal of block is changed the mold, the output end of the impedance converter unit and the voltage current conversion unit first input end are total
It is connected in the signal end of the Voltage to current transducer module, the output end of the voltage current conversion unit turns for the voltage and current
Change the mold the output end of block.
In one embodiment, the impedance converter unit includes second operational amplifier, resistance R5, resistance R6, resistance
R7, capacitor C4 and the first potentiometer；
The first end of the resistance R5 and the non-inverting input terminal of the second operational amplifier connect to form the impedance change altogether
Change the first input end of unit, the second end ground connection of the resistance R5, the inverting input terminal difference of the second operational amplifier
It is connect altogether with the output end of the second operational amplifier and the first end of the resistance R6, the voltage of the second operational amplifier
Input terminal is the second input terminal of the impedance converter unit, the second end of the resistance R6 and the first of first potentiometer
End is connected, the second end of first potentiometer ground connection, the sliding end of the first end of first potentiometer respectively with the electricity
The first end of the first end and the resistance R7 of holding C4 connects altogether, the second end ground connection of the capacitor C4, and the second of the resistance R7
End is the output end of the impedance converter unit.
In one embodiment, the voltage current conversion unit include third operational amplifier, four-operational amplifier,
Resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, first diode and triode；
The non-inverting input terminal of the third operational amplifier is the first input end of the voltage current conversion unit, described
The collector of the voltage input end of third operational amplifier, the voltage input end of the four-operational amplifier and the triode
Connect the second input terminal to form the voltage current conversion unit altogether, the inverting input terminal of the third operational amplifier respectively with
The first end of shuttle Hu resistance R8 and the first end of the resistance R9 connect altogether, the second end ground connection of the resistance R8, the resistance R9
First end of the second end respectively with the output end of the third operational amplifier and the resistance R10 connect altogether, the resistance R10
First end of the second end respectively with the non-inverting input terminal of the four-operational amplifier and the resistance R13 connect altogether, described
First end of the inverting input terminal of four-operational amplifier respectively with the first end of the resistance R11 and the resistance R12 connects altogether, institute
State resistance R11 second end ground connection, the second end of the resistance R12 respectively with the emitter of the triode and the resistance
The first end of R14 connects altogether, and the output end of the four-operational amplifier is connected with the base stage of the triode, the resistance R13
Anode of the second end respectively with the second end of the resistance R14 and the first diode connect altogether, the first diode
Cathode is the output end of the voltage current conversion unit.
In one embodiment, the bias-adjusted module includes adjusting unit and second signal amplifying unit；
The input terminal for adjusting unit is the first input end of the bias-adjusted module, the output for adjusting unit
End is connected with the first input end of the second signal amplifying unit, and the second input terminal of the second signal amplifying unit is institute
The second input terminal of bias-adjusted module is stated, the output end of the second signal amplifying unit is the defeated of the bias-adjusted module
Outlet.
In one embodiment, the adjusting unit includes resistance R15, resistance R16, resistance R17, capacitor C7, the second electricity
Position device and voltage-stablizer；
The first end of the resistance R15 be it is described adjust unit input terminal, the second end of the resistance R15 respectively with institute
The input terminal of the first end and the voltage-stablizer of stating resistance R16 connects altogether, the output end ground connection of the voltage-stablizer, the resistance R16
Second end be connected with the first end of second potentiometer, the of the second end of second potentiometer and the resistance R17
One end is connected, the second end ground connection of the resistance R17, and the first end of the sliding end of second potentiometer and the capacitor C7 are total
It connects to form the output end for adjusting unit, the second end ground connection of the capacitor C7.
In one embodiment, the second signal amplifying unit includes resistance R18 and the 5th operational amplifier；
The non-inverting input terminal of 5th operational amplifier is the first input end of the second signal amplifying unit, described
The voltage input end of 5th operational amplifier is the second input terminal of the second signal amplifying unit, the 5th operation amplifier
First end of the inverting input terminal of device respectively with the output end of the second signal amplifying unit and the resistance R18 connects altogether, institute
The second end for stating resistance R18 is the output end of the second signal amplifying unit.
Existing beneficial effect is the utility model embodiment compared with prior art: the utility model is converted by signal
The square-wave signal of the different duty received is converted into d. c. voltage signal by module, and Voltage to current transducer module and biasing are adjusted
D. c. voltage signal is converted into required current signal by section module, and the utility model can will preferably will be handled by single-chip microcontroller
Sensor signal afterwards is converted into current signal.
Detailed description of the invention
In order to illustrate more clearly of the technical scheme in the embodiment of the utility model, will make below to required in embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are merely some embodiments of the present invention,
For those of ordinary skill in the art, without any creative labor, it can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural schematic diagram for the sensor signal conversion circuit that one embodiment of the utility model provides；
The circuit structure of sensor signal conversion module shows in Fig. 1 that Fig. 2 provides for one embodiment of the utility model
It is intended to；
The circuit structure signal of Voltage to current transducer module in Fig. 1 that Fig. 3 provides for one embodiment of the utility model
Figure；
The electrical block diagram of bias-adjusted module in Fig. 1 that Fig. 4 provides for one embodiment of the utility model；
Fig. 5 is the electrical block diagram for the power module that one embodiment of the utility model provides.
Specific embodiment
In order to make those skilled in the art more fully understand this programme, below in conjunction with attached in this programme embodiment
Figure, is explicitly described the technical solution in this programme embodiment, it is clear that described embodiment is this programme a part
Embodiment, instead of all the embodiments.Based on the embodiment in this programme, those of ordinary skill in the art are not being made
The range of this programme protection all should belong in every other embodiment obtained under the premise of creative work.
The specification and claims of this programme and term " includes " and other any deformations in above-mentioned attached drawing are
Refer to " including but not limited to ", it is intended that cover and non-exclusive include.In addition, term " first " and " second " etc. are for distinguishing
Different objects, not for description particular order.
The realization of the utility model is described in detail below in conjunction with specific attached drawing:
Fig. 1 shows a kind of sensor signal conversion circuit provided by an embodiment of the present invention, for the ease of saying
It is bright, part relevant to the utility model embodiment is illustrated only, details are as follows:
As shown in Figure 1, sensor signal conversion circuit 1 provided by the utility model embodiment, including signal modulus of conversion
Block 110, Voltage to current transducer module 120 and bias-adjusted module 130.
The signal conversion module 110 is connected with the Voltage to current transducer module 120, the bias-adjusted module 130
Output end be connected with the signal end of the Voltage to current transducer module 120.
The signal conversion module 110 receives the square-wave signal of different duty and handles output d. c. voltage signal；Institute
It states bias-adjusted module 130 and the bias voltage after adjusting is transmitted to the Voltage to current transducer module 120；The voltage and current
Conversion module 120 receives the d. c. voltage signal and the bias voltage, and the d. c. voltage signal is converted into electric current letter
Number output.
In the present embodiment, the input terminal of signal conversion module 110 can be connected with the output end of single-chip microcontroller, and single-chip microcontroller obtains
What is taken can be sensor signal, and what monolithic exported is the square wave letter for the different duty of sensor signal obtained by transformation
Number.
In the utility model embodiment, by signal conversion module 110 by the square-wave signal of the different duty received
It is converted into d. c. voltage signal, d. c. voltage signal is converted into institute by Voltage to current transducer module 120 and bias-adjusted module 130
The current signal needed, the utility model can will treated that sensor signal is converted into current signal by single-chip microcontroller.
As shown in Fig. 2, signal conversion module 110 includes signal conversion unit in one embodiment of the utility model
111 and first signal amplification unit 112.
The input terminal of the signal conversion unit 111 is the first input end of the signal conversion module 110, the signal
The output end of converting unit 111 is connected with the first input end of first signal amplification unit 112, the first signal amplification
Second input terminal of unit 112 is the second input terminal of the signal conversion module 110, first signal amplification unit 112
Output end be the signal conversion module 110 output end.
The square-wave signal of the different duty is converted into the d. c. voltage signal by the signal conversion unit 111,
First signal amplification unit 112 exports the d. c. voltage signal after amplification.
In the present embodiment, the second input terminal input of the first signal amplification unit 112 is supply voltage.
As shown in Fig. 2, signal conversion unit 111 includes resistance R1, resistance in one embodiment of the utility model
R2, capacitor C1 and capacitor C2.
The first end of the resistance R1 is the input terminal of the signal conversion unit 111, the second end point of the resistance R1
First end not with the first end of the resistance R2 and the capacitor C1 connects altogether, the second end of the resistance R2 and the capacitor C2
First end connect the output end to form the signal conversion unit 111 altogether, the second end of the capacitor C2 and the capacitor C1's
Second end is grounded altogether.
As shown in Fig. 2, the first signal amplification unit 112 includes resistance R3, electricity in one embodiment of the utility model
Hinder R4 and the first operational amplifier.
The non-inverting input terminal of first operational amplifier is the first input end of first signal amplification unit 112,
The voltage input end of first operational amplifier be first signal amplification unit 112 the second input terminal, described first
The second end of the output end of operational amplifier and the resistance R4 connect the output to form first signal amplification unit 112 altogether
End, the inverting input terminal of first operational amplifier first end with the first end of the resistance R3 and the resistance R4 respectively
It connects altogether, the second end ground connection of the resistance R3.
In the present embodiment, the model of the first operational amplifier can be LM258.
As shown in figure 3, in one embodiment of the utility model, the input terminal of Voltage to current transducer module 120 includes
First input end and the second input terminal.
As shown in figure 3, Voltage to current transducer module 120 is converted including impedance in one embodiment of the utility model
Unit 121 and voltage current conversion unit 122.
The first input end of the impedance converter unit 121 is the first input end of the Voltage to current transducer module 120,
Second input terminal of the impedance converter unit 121 and the second input terminal of the voltage current conversion unit 122 are connected in institute altogether
The second input terminal of Voltage to current transducer module 120 is stated, the output end and the voltage and current of the impedance converter unit 121 turn
Change the signal end that 122 first input end of unit is connected in the Voltage to current transducer module 120 altogether, the voltage current conversion unit
122 output end is the output end of the Voltage to current transducer module 120.
In the present embodiment, the effect of impedance converter unit 121 is impedance transformation, is also possible to synchronous Following effect, main
If prevent 130 voltage of bias-adjusted module from adjusting, the input voltage of Voltage to current transducer module 120 is influenced.
In the present embodiment, voltage signal is mainly converted into current signal by the effect of voltage current conversion unit 122.
In the present embodiment, the transformational relation of input voltage and output electric current may is that Y is electric current mADC, and X is voltage
VDC。
Y=X*16/2.5+4 (0~2.5VDC turns 4~20mADC)；
Y=X*16/3.3+4 (0~3.3VDC turns 4~20mADC)；
Y=X*16/5+4 (0~5VDC turns 4~20mADC)；
Y=X*16/10+4 (0~10VDC turns 4~20mADC)；
Y=X*16/15+4 (0~15VDC turns 4~20mADC)；
Y=X*20/2.5 (0~2.5VDC turns 0~20mADC)；
Y=X*20/3.3 (0~3.3VDC turns 0~20mADC)；
Y=X*20/5 (0~5VDC turns 0~20mADC)；
Y=X*20/10 (0~10VDC turns 0~20mADC)；
Y=X*20/15 (0~15VDC turns 0~20mADC).
As shown in figure 3, impedance converter unit 121 includes the second operation amplifier in one embodiment of the utility model
Device, resistance R5, resistance R6, resistance R7, capacitor C4 and the first potentiometer.
The first end of the resistance R5 and the non-inverting input terminal of the second operational amplifier connect to form the impedance change altogether
Change the first input end of unit 121, the second end ground connection of the resistance R5, the inverting input terminal point of the second operational amplifier
First end not with the output end of the second operational amplifier and the resistance R6 connects altogether, the electricity of the second operational amplifier
Pressing input terminal is the second input terminal of the impedance converter unit 121, the second end of the resistance R6 and first potentiometer
First end be connected, the second end of first potentiometer ground connection, the sliding end of the first end of first potentiometer respectively with
The first end of the capacitor C4 and the first end of the resistance R7 connect altogether, the second end ground connection of the capacitor C4, the resistance R7
Second end be the impedance converter unit 121 output end.
In the present embodiment, the model of second operational amplifier can be LM224D.
As shown in figure 3, voltage current conversion unit 122 includes third operation in one embodiment of the utility model
Amplifier, four-operational amplifier, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14,
First diode and triode.
The non-inverting input terminal of the third operational amplifier is the first input end of the voltage current conversion unit 122,
Voltage input end, the voltage input end of the four-operational amplifier and the collection of the triode of the third operational amplifier
Electrode connects the second input terminal to form the voltage current conversion unit 122, the anti-phase input of the third operational amplifier altogether
The first end respectively with the first end of shuttle Hu resistance R8 and the resistance R9 is held to connect altogether, the second end ground connection of the resistance R8, institute
It states first end of the second end of resistance R9 respectively with the output end of the third operational amplifier and the resistance R10 to connect altogether, institute
The second end for stating resistance R10 is total with the non-inverting input terminal of the four-operational amplifier and the first end of the resistance R13 respectively
Connect, the inverting input terminal of the four-operational amplifier respectively with the first end of the resistance R11 and the resistance R12 first
End connects altogether, the second end of resistance R11 ground connection, the second end of the resistance R12 respectively with the emitter of the triode and
The first end of the resistance R14 connects altogether, and the output end of the four-operational amplifier is connected with the base stage of the triode, described
Anode of the second end of resistance R13 respectively with the second end of the resistance R14 and the first diode connects altogether, and the described 1st
The cathode of pole pipe is the output end of the voltage current conversion unit 122.
In the present embodiment, the model of third operational amplifier can be LM224D.
In the present embodiment, the model of four-operational amplifier can be LM224D.
As shown in figure 4, bias-adjusted module 130 includes adjusting 131 He of unit in one embodiment of the utility model
Second signal amplifying unit 132.
The input terminal for adjusting unit 131 is the first input end of the bias-adjusted module 130, the adjusting unit
131 output end is connected with the first input end of the second signal amplifying unit 132, the second signal amplifying unit 132
The second input terminal be the bias-adjusted module 130 the second input terminal, the output end of the second signal amplifying unit 132
For the output end of the bias-adjusted module 130.
In the present embodiment, bias-adjusted module 130 is also zeroing module, for adjusting Voltage to current transducer module 120
Export the initial value of electric current.
As shown in figure 4, in one embodiment of the utility model, adjust unit 131 include resistance R15, resistance R16,
Resistance R17, capacitor C7, the second potentiometer and voltage-stablizer.
The first end of the resistance R15 is the input terminal for adjusting unit 131, the second end difference of the resistance R15
It is connect altogether with the first end of the resistance R16 and the input terminal of the voltage-stablizer, the output end ground connection of the voltage-stablizer, the resistance
The second end of R16 is connected with the first end of second potentiometer, and the second end of second potentiometer is with the resistance R17's
First end is connected, the second end ground connection of the resistance R17, the first end of the sliding end of second potentiometer and the capacitor C7
It connects to form the output end for adjusting unit 131 altogether, the second end ground connection of the capacitor C7.
In the present embodiment, voltage-stablizer can be TL431BILP.
In the present embodiment, the output voltage values of bias-adjusted module 130 are adjusted by adjusting the second potentiometer.
As shown in figure 4, in one embodiment of the utility model, second signal amplifying unit 132 include resistance R18 and
5th operational amplifier.
The non-inverting input terminal of 5th operational amplifier is the first input end of the second signal amplifying unit 132,
The voltage input end of 5th operational amplifier be the second signal amplifying unit 132 the second input terminal, the described 5th
The inverting input terminal of operational amplifier respectively with the output end of the second signal amplifying unit 132 and the resistance R18
One end connects altogether, and the second end of the resistance R18 is the output end of the second signal amplifying unit 132.
In the present embodiment, the model of the 5th operational amplifier can be LM224D.
As shown in figure 5, sensor signal conversion circuit 1 further includes for biasing in one embodiment of the utility model
Adjustment module 130 provides the power module 140 of voltage, and power module 140 is connected with bias-adjusted module 130.
As shown in figure 5, the voltage chips of power module 140 can be in one embodiment of the utility model
LM317LM。
It should be noted that the identical port of label or pin are to be connected in the utility model the description and the appended drawings.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (10)
1. a kind of sensor signal conversion circuit, which is characterized in that including signal conversion module, Voltage to current transducer module and partially
Set adjustment module；
The signal conversion module is connected with the Voltage to current transducer module, the output end of the bias-adjusted module with it is described
The signal end of Voltage to current transducer module is connected；
The signal conversion module receives the square-wave signal of different duty and handles output d. c. voltage signal；The biasing is adjusted
It saves module and the bias voltage after adjusting is transmitted to the Voltage to current transducer module；The Voltage to current transducer module receives institute
D. c. voltage signal and the bias voltage are stated, the d. c. voltage signal is converted into current signal output.
2. sensor signal conversion circuit as described in claim 1, which is characterized in that the signal conversion module includes signal
Converting unit and the first signal amplification unit；
The input terminal of the signal conversion unit is the first input end of the signal conversion module, the signal conversion unit
Output end is connected with the first input end of first signal amplification unit, the second input terminal of first signal amplification unit
For the second input terminal of the signal conversion module, the output end of first signal amplification unit is the signal conversion module
Output end；
The square-wave signal or the voltage signal are converted into the d. c. voltage signal by the signal conversion unit, and described
One signal amplification unit exports the d. c. voltage signal after amplification.
3. sensor signal conversion circuit as claimed in claim 2, which is characterized in that the signal conversion unit includes resistance
R1, resistance R2, capacitor C1 and capacitor C2；
The first end of the resistance R1 be the signal conversion unit input terminal, the second end of the resistance R1 respectively with it is described
The first end of resistance R2 and the first end of the capacitor C1 connect altogether, the first end of the second end of the resistance R2 and the capacitor C2
Connect the output end to form the signal conversion unit altogether, the second end of the second end of the capacitor C2 and the capacitor C1 connect altogether
Ground.
4. sensor signal conversion circuit as claimed in claim 2, which is characterized in that first signal amplification unit includes
Resistance R3, resistance R4 and the first operational amplifier；
The non-inverting input terminal of first operational amplifier be first signal amplification unit first input end, described first
The voltage input end of operational amplifier is the second input terminal of first signal amplification unit, first operational amplifier
The second end of output end and the resistance R4 connect the output end to form first signal amplification unit altogether, and first operation is put
First end of the inverting input terminal of big device respectively with the first end of the resistance R3 and the resistance R4 connects altogether, the resistance R3's
Second end ground connection.
5. sensor signal conversion circuit as described in claim 1, which is characterized in that the Voltage to current transducer module includes
Impedance converter unit and voltage current conversion unit；
The first input end of the impedance converter unit is the first input end of the Voltage to current transducer module, and the impedance becomes
Second input terminal of the second input terminal and the voltage current conversion unit that change unit is connected in the Voltage to current transducer mould altogether
Second input terminal of block, the output end of the impedance converter unit are connected in altogether with the voltage current conversion unit first input end
The signal end of the Voltage to current transducer module, the output end of the voltage current conversion unit are the Voltage to current transducer mould
The output end of block.
6. sensor signal conversion circuit as claimed in claim 5, which is characterized in that the impedance converter unit includes second
Operational amplifier, resistance R5, resistance R6, resistance R7, capacitor C4 and the first potentiometer；
The first end of the resistance R5 and the non-inverting input terminal of the second operational amplifier connect to form the impedance transformation list altogether
Member first input end, the resistance R5 second end ground connection, the inverting input terminal of the second operational amplifier respectively with institute
The first end of the output end and the resistance R6 of stating second operational amplifier connects altogether, the voltage input of the second operational amplifier
End is the second input terminal of the impedance converter unit, the first end phase of the second end of the resistance R6 and first potentiometer
Even, the second end of first potentiometer ground connection, the sliding end of the first end of first potentiometer respectively with the capacitor C4
First end and the first end of the resistance R7 connect altogether, the second end ground connection of the capacitor C4, the second end of the resistance R7 is
The output end of the impedance converter unit.
7. sensor signal conversion circuit as claimed in claim 5, which is characterized in that the voltage current conversion unit includes
Third operational amplifier, four-operational amplifier, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13,
Resistance R14, first diode and triode；
The non-inverting input terminal of the third operational amplifier is the first input end of the voltage current conversion unit, the third
The collector of the voltage input end of operational amplifier, the voltage input end of the four-operational amplifier and the triode connects altogether
Form the second input terminal of the voltage current conversion unit, the inverting input terminal of the third operational amplifier respectively with it is described
The first end of resistance R8 and the first end of the resistance R9 connect altogether, the second end of resistance R8 ground connection, and the of the resistance R9
First end of two ends respectively with the output end of the third operational amplifier and the resistance R10 connects altogether, and the of the resistance R10
First end of two ends respectively with the non-inverting input terminal of the four-operational amplifier and the resistance R13 connects altogether, the 4th fortune
It calculates first end of the inverting input terminal of amplifier respectively with the first end of the resistance R11 and the resistance R12 to connect altogether, the electricity
Hinder the second end ground connection of R11, the second end of the resistance R12 respectively with the emitter of the triode and the resistance R14
First end connects altogether, and the output end of the four-operational amplifier is connected with the base stage of the triode, and the second of the resistance R13
The anode respectively with the second end of the resistance R14 and the first diode is held to connect altogether, the cathode of the first diode is
The output end of the voltage current conversion unit.
8. sensor signal conversion circuit as described in claim 1, which is characterized in that the bias-adjusted module includes adjusting
Unit and second signal amplifying unit；
It is described adjust unit input terminal be the bias-adjusted module first input end, it is described adjust unit output end with
The first input end of the second signal amplifying unit is connected, and the second input terminal of the second signal amplifying unit is described inclined
The second input terminal of adjustment module is set, the output end of the second signal amplifying unit is the output of the bias-adjusted module
End.
9. sensor signal conversion circuit as claimed in claim 8, which is characterized in that the adjusting unit include resistance R15,
Resistance R16, resistance R17, capacitor C7, the second potentiometer and voltage-stablizer；
The first end of the resistance R15 be it is described adjust unit input terminal, the second end of the resistance R15 respectively with the electricity
The first end and the input terminal of the voltage-stablizer for hindering R16 connect altogether, the output end ground connection of the voltage-stablizer, and the of the resistance R16
Two ends are connected with the first end of second potentiometer, the first end of the second end of second potentiometer and the resistance R17
It is connected, the second end ground connection of the resistance R17, the sliding end of second potentiometer and the first end of the capacitor C7 connect shape altogether
At the output end for adjusting unit, the second end ground connection of the capacitor C7.
10. sensor signal conversion circuit as claimed in claim 8, which is characterized in that the second signal amplifying unit packet
Include resistance R18 and the 5th operational amplifier；
The non-inverting input terminal of 5th operational amplifier be the second signal amplifying unit first input end, the described 5th
The voltage input end of operational amplifier is the second input terminal of the second signal amplifying unit, the 5th operational amplifier
First end of the inverting input terminal respectively with the output end of the second signal amplifying unit and the resistance R18 connects altogether, the electricity
The second end for hindering R18 is the output end of the second signal amplifying unit.
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| CN201822190326.1U CN209218062U (en) | 2018-12-20 | 2018-12-20 | A kind of sensor signal conversion circuit |
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| CN201822190326.1U CN209218062U (en) | 2018-12-20 | 2018-12-20 | A kind of sensor signal conversion circuit |
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| CN209218062U true CN209218062U (en) | 2019-08-06 |
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