CN103560717B - Method for detecting position and device - Google Patents
Method for detecting position and device Download PDFInfo
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- CN103560717B CN103560717B CN201310503776.0A CN201310503776A CN103560717B CN 103560717 B CN103560717 B CN 103560717B CN 201310503776 A CN201310503776 A CN 201310503776A CN 103560717 B CN103560717 B CN 103560717B
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Abstract
The open a kind of position detecting device of the present invention, comprising: drive circuit, displacement detecting circuit and error amplifying circuit；Displacement detecting circuit includes potentiometer, and the slider of potentiometer connects with the positive input terminal of the Displacement link of motor output end and error amplifying circuit；The resistance both sides line of potentiometer connects the negative input end of error amplifying circuit；The output of error amplifying circuit connects drive circuit；Drive circuit includes that the rotating forward with motor controls the control loop that lead-in wire is connected and the control loop being connected with motor reversion control lead-in wire.The present invention is combined with the drive circuit of engine by displacement detecting circuit, the displacement occurred when can follow the tracks of motor rotation according to the change in resistance of potentiometer, and change in resistance is converted into the output voltage signal of change proportional therewith to control the rotation error of motor.Visible present configuration is simple, and it is long that it not only has the life-span, the feature of low cost, but also can accurately control the rotation error of motor.
Description
Technical field
The present invention relates to a kind of measurement technology, particularly relate to a kind of method for detecting position and device.
Background technology
Along with the development of China's process of industrialization, the position detection control of industrialized production parts is more
More seem important.Nowadays displacement detecting control technology has covered many industrial departments, such as electricity
The fields such as power, oil, chemical industry, weaving, metallurgy.
At present, position detecting device uses the contact type structure of line geometric pattern resistor, this slip mostly
The position detecting device of contact structures is shorter for not only mechanical life, and relatively costly.
Summary of the invention
For solving above-mentioned problems of the prior art and defect, the present invention provides the detection of a kind of position
Method and apparatus, it is long that it not only has the life-span, simple in construction, the feature of low cost, and can essence
Really control the rotation error of motor.
Technical scheme is as follows:
The present invention provides a kind of position detecting device, comprising:
Drive circuit, displacement detecting circuit and error amplifying circuit；
Institute's displacement detection circuit, including potentiometer, the 3rd power supply V3, resistance R1, slide rheostat
R2, wherein potentiometer includes that the positive pole of resistance R3 and resistance R4, described 3rd power supply V3 connects slip
One end of rheostat R2 is also simultaneously connected with one end of resistance R3 of potentiometer；The negative pole of the 3rd power supply V3 is even
One end of connecting resistance R1 is also simultaneously connected with one end of resistance R4 of potentiometer；The slider of potentiometer is even
Connect the Displacement link of motor side and connect the high-potential output end of this displacement detecting circuit；Resistance R1's
The other end is connected with the other end of slide rheostat R2, and connects the electronegative potential output of displacement detecting circuit
End；
The output of described error amplifying circuit connects described drive circuit；Described error amplifying circuit has
Body includes: resistance R5, resistance R7, resistance Ra, resistance Rb and amplifier OP；Described resistance R5's
One end connects the other end of the resistance R6 in drive circuit, and the other end of resistance R5 connects amplifier OP
Output；The negative input end of amplifier OP connects one end of resistance Ra, and the other end of resistance Ra is drawn
Wire connects the high-potential output end of institute's displacement detection circuit；The positive input terminal of described amplifier OP connects
One end of resistance Rb, the other end of resistance Rb is drawn wire and is connect the electronegative potential output of displacement detecting circuit
End, one end of resistance R7 connects the negative input end of amplifier OP, and the other end of resistance R7 is connected to electricity
On the points of common connection of resistance R5 and resistance R6；
Described drive circuit includes controlling the control loop that is connected of lead-in wire and with electronic with rotating forward of motor
Machine reversion controls the control loop that lead-in wire is connected；Described drive circuit specifically includes:
First power supply V1, second source V2, the first transistor Tr1, transistor seconds Tr2 and resistance R6；
The positive pole of described first power supply V1 connects the colelctor electrode of the first transistor Tr1, the first transistor Tr1
Emitter stage connect controlling lead-in wire and the emitter stage of transistor seconds Tr2 and being connected to of described motor
One end of resistance R6；The base stage of the first transistor Tr1 is connected with the base stage of transistor seconds Tr2 and receives
The other end of resistance R6；Another of this resistance R6 terminates described error amplifying circuit；Transistor seconds Tr2
Colelctor electrode be connected to the negative pole of second source V2；The positive pole of second source V2 and the first power supply V1's
Negative pole is connected, and another root being connected to described motor controls lead-in wire.
Further, all-in resistance R of described potentiometerPAnd the relation between resistance R3 and resistance R4 is full
Foot: RP=R3+R4.
By such scheme of the present invention it can be seen that pass through displacement detecting circuit and the engine of the present invention
Drive circuit combines, it is possible to the position occurred when following the tracks of motor rotation according to the change in resistance of potentiometer
Move, and the output voltage signal that the change in resistance of potentiometer is converted into change proportional therewith controls
The rotation error of motor.Visible present configuration is simple, and it is long that it not only has the life-span, low cost
Feature, but also can accurately control the rotation error of motor.
Accompanying drawing explanation
Fig. 1 is the equivalent circuit diagram of a kind of position detecting device in the present invention；
Fig. 2 is the electrical block diagram of a kind of position detecting device of the present invention.
Detailed description of the invention
For making the purpose of patent of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing
Patent of the present invention is described in further detail.
First embodiment of the invention provides a kind of position detecting device, its general principle as it is shown in figure 1,
The slider of displacement detecting potentiometer is connected with the output displacement connecting rod of motor, utilizes potentiometer
Change in resistance follow the tracks of motor rotation time occur displacement, and the change in resistance of potentiometer is converted into
Be directly proportional change output voltage signal, then combine with the drive circuit of engine, control electricity
The rotation error of motivation.
The circuit structure of above-mentioned position detecting device is as in figure 2 it is shown, include: drive circuit 101, error
Amplifying circuit 102 and displacement detecting circuit 103.
Drive circuit is dual power supply rotating drive circuit, and it is controlled loop by 2 and forms, one of them
Being to control, with rotating forward of motor, the control loop that lead-in wire is connected, another is to control with motor reversion
The control loop that lead-in wire is connected.Specifically include: the first power supply V1, second source V2, the first transistor
Tr1, transistor seconds Tr2 and resistance R6.Its annexation is as follows: the positive pole of the first power supply V1 connects
The colelctor electrode of the first transistor Tr1, the emitter stage of the first transistor Tr1 connects the positive pole of motor and draws
Wire and the emitter stage of transistor seconds Tr2, and it is connected to one end of resistance R6；The first transistor Tr1
Base stage be connected with the base stage of transistor seconds Tr2 and receive the other end of resistance R6；This resistance R6's
Another terminates error amplifying circuit；The colelctor electrode of transistor seconds Tr2 is connected to the negative of second source V2
Pole；The positive pole of second source V2 and the negative pole of the first power supply V1 are connected, and are connected to motor another
Root is drawn on wire.
Error amplifying circuit includes: resistance R5, resistance R7, resistance Ra, resistance Rb and amplifier OP.
The other end of the resistance R6 during wherein one end of resistance R5 connects drive circuit, the other end of resistance R5 is even
Connect the output of amplifier OP；The negative input end of amplifier OP connects one end of resistance Ra, resistance Ra
The other end draw wire and connect the high-potential output end of displacement detecting circuit；The positive input terminal of amplifier OP
Connecting one end of resistance Rb, the electronegative potential that the other end extraction wire of resistance Rb connects displacement detecting circuit is defeated
Going out end, one end of resistance R7 connects the negative input end of amplifier OP, and the other end of resistance R7 is connected to
On the points of common connection of resistance R5 and resistance R6.
Displacement detecting circuit is by the 3rd power supply V3, resistance R1, slide rheostat R2, potentiometer RP
Resistance R3 and resistance R4 constitute bridge circuit, wherein all-in resistance R of potentiometerP=R3+R4.Should
The annexation of displacement detecting circuit is as follows:
The positive pole of the 3rd power supply V3 connects slide rheostat R2 one end and is simultaneously connected with the resistance of potentiometer
One end of R3；The negative pole of the 3rd power supply V3 connects one end of resistance R1 and is simultaneously connected with the resistance of potentiometer
One end of R4；The slider R of potentiometerPConnect the Displacement link of motor side and connect this displacement inspection
The high-potential output end of slowdown monitoring circuit；The other end of resistance R1 is connected with the other end of slide rheostat R2,
And connect the electronegative potential output of displacement detecting circuit.
In this bridge-type displacement detecting circuit, potentiometer RPIn the resistance R3 that is connected and resistance R4 midpoint
The magnitude of voltage at place, as reference voltage, carries out position balance setting with slide rheostat R2.LJust
=R1/ (R2+R3) is the formula calculating positive direction skew, LInstead=R4/ (R3+R4) is for calculating opposite direction skew
Formula, bridge-type equilibrium condition R4 (R1+R2)=R1 (R3+R4) also for position detect equilibrium condition.Just
During secondary use, adjust potentiometer RPSlider so that it is point to resistance R3 and resistance R4 midpoint,
Make R3=R4, to ensure reference voltage；Then change effective resistance of slide rheostat R2, make
State bridge-type displacement detecting circuit and meet bridge-type equilibrium condition.
The operation principle of above-mentioned position detecting device is as follows:
During motor rotation during gear angled generation skew, motor is passed by rack-and-pinion
Dynamic device drives Displacement link to move, Displacement link and potentiometer RpSlider connect, such position
While shifting connecting rod is subjected to displacement, slider RPAlso can be subjected to displacement change therewith, so slide and touch
Head RpThe resistance of the resistance R3 and resistance R4 of both sides also can change therewith.
In bridge-type displacement detecting circuit, when meeting R4 (R1+R2)=R1 (R3+R4) this formula,
During motor rotation is described there is not angle displacement in gear.When potentiometer is subjected to displacement change,
The equilibrium condition of bridge-type displacement detecting circuit is the most destroyed, if because the change of the gear anglec of rotation makes
R3 reduces, then the voltage of Rb deviation will occur therebetween more than the voltage (i.e. Vb > Va) of Ra
Voltage Ve.The deviation voltage Ve of the two is amplified by the operational amplifier in error amplifying circuit,
The output of amplifier produce the biggest gain (+) voltage.Owing to the voltage of amplifier out increases,
Make the first transistor Tr1 turn on, the sense of current as shown in the i1 in figure, at this moment the born voltage of motor
For+V0, motor is driven to rotate in the counterclockwise direction.
When motor counterclockwise rotates, the slider of potentiometer RP moves to resistance R4 direction,
At this moment, the relation of resistance R3 and resistance R4 is: R3 > R4.Shifting along with the slider of potentiometer RP
Dynamic, deviation voltage Ve is gradually reduced, until Vb=Va, makes deviation voltage Ve=0, and at this moment, error is put
The output voltage signal V0 of the amplifier in big circuit also becomes 0, makes the first transistor Tr1 turn off, electricity
The most therefore motivation stops, and now original place is also recalled in the position of motor.
Contrary with above-mentioned situation, if the change of the gear anglec of rotation makes R4 reduce, now Vb < Va,
Deviation voltage Ve becomes negative value, and the output voltage V0 of the amplifier in error amplifying circuit also becomes negative
Value, makes the first transistor Tr1 turn off, and transistor seconds Tr2 conducting, at this moment, motor will be along suitable
Clockwise rotates.Meanwhile, motor by transmission device drive potentiometer slider to
Rightabout moves.Along with the movement of the slider of potentiometer, deviation voltage Ve is gradually reduced, directly
To Vb=Va, make deviation voltage Ve=0, the output voltage signal V0 of the amplifier in error amplifying circuit
Also becoming 0, at this moment transistor seconds Tr2 turns off, motor the most therefore stall, the now position of motor
Put and also recalled to original place.
If the speed of motor is quickly, the slider of the potentiometer given with position will move simultaneously,
Almost without temporal delay, therefore the displacement with the Displacement link of potentiometer linkage is examined with displacement
The output voltage signal of the slider of slowdown monitoring circuit is directly proportional change, it is possible to realize position control and detection.
The present invention also provides for a kind of method for detecting position, and it realizes electricity based on above-mentioned position detecting device
The position detection of motivation the positional information according to detection adjust motor position in time and restore.Stream in detail
Journey includes:
First, the displacement of the Displacement link being connected with motor output end is gathered；
Then, described displacement is converted to voltage signal by potentiometer based on displacement detecting circuit, and
Compare with the reference voltage of rheostat R2 adjustment and obtain pressure reduction；Described pressure reduction is believed as motor-driven
Number；
Finally, described motor drive signal is amplified, and based on the motor-driven after amplifying
Signal drive motor rotating operates.
By such scheme of the present invention it can be seen that pass through displacement detecting circuit and the engine of the present invention
Drive circuit combines, it is possible to the angle occurred when following the tracks of motor rotation according to the change in resistance of potentiometer
Displacement, and the output voltage signal that the change in resistance of potentiometer is converted into change proportional therewith controls
The rotation error of motor processed.Visible present configuration is simple, and it is long that it not only has the life-span, low cost
Feature, but also can accurately control the rotation error of motor.
It will be appreciated by those skilled in the art that the present invention can with beyond specifically described herein those, do not have
The particular form of the spirit or essential characteristics of the deviation present invention performs.Therefore, all aspects is above-mentioned
Embodiment should be interpreted that illustrate rather than restrictive.The scope of the present invention should be by appended
Claims and their legal equivalents determine rather than are determined by foregoing description, and
Change within the implication of fallen with appended claims and equivalency range all will be included.
It will be apparent to one skilled in the art that and the most do not show
The claim quoted mutually with showing can combine, as the illustrative embodiments of the present invention,
Or it is included and becomes new claim by amendment afterwards after submitting the application to.
The mode of the present invention
Various embodiment is had been described with for the best mode performing the present invention.
Industrial applicability
As apparent to according to foregoing description, it will be apparent to those skilled in the art that
It is the present invention can be made various modifications and variations, without departing from the spirit or scope of the present invention.
Fall within the scope of appended claims and their equivalent accordingly, it is intended to the present invention covers
Modification and modification.
Claims (2)
1. a position detecting device, it is characterised in that described position detecting device includes:
Drive circuit, displacement detecting circuit and error amplifying circuit；
Institute's displacement detection circuit, including potentiometer, the 3rd power supply V3, resistance R1, slide rheostat
R2, wherein potentiometer includes that the positive pole of resistance R3 and resistance R4, described 3rd power supply V3 connects slip
One end of rheostat R2 is also simultaneously connected with one end of resistance R3 of potentiometer；The negative pole of the 3rd power supply V3 is even
One end of connecting resistance R1 is also simultaneously connected with one end of resistance R4 of potentiometer；The slider of potentiometer is even
Connect the Displacement link of motor side and connect the high-potential output end of this displacement detecting circuit；Resistance R1's
The other end is connected with the other end of slide rheostat R2, and connects the electronegative potential output of displacement detecting circuit
End；
The output of described error amplifying circuit connects described drive circuit；Described error amplifying circuit has
Body includes: resistance R5, resistance R7, resistance Ra, resistance Rb and amplifier OP；Described resistance R5's
One end connects the other end of the resistance R6 in drive circuit, and the other end of resistance R5 connects amplifier OP
Output；The negative input end of amplifier OP connects one end of resistance Ra, and the other end of resistance Ra is drawn
Wire connects the high-potential output end of institute's displacement detection circuit；The positive input terminal of described amplifier OP connects
One end of resistance Rb, the other end of resistance Rb is drawn wire and is connect the electronegative potential output of displacement detecting circuit
End, one end of resistance R7 connects the negative input end of amplifier OP, and the other end of resistance R7 is connected to electricity
On the points of common connection of resistance R5 and resistance R6；
Described drive circuit includes controlling the control loop that is connected of lead-in wire and with electronic with rotating forward of motor
Machine reversion controls the control loop that lead-in wire is connected；Described drive circuit specifically includes:
First power supply V1, second source V2, the first transistor Tr1, transistor seconds Tr2 and resistance R6；
The positive pole of described first power supply V1 connects the colelctor electrode of the first transistor Tr1, the first transistor Tr1
Emitter stage connect controlling lead-in wire and the emitter stage of transistor seconds Tr2 and being connected to of described motor
One end of resistance R6；The base stage of the first transistor Tr1 is connected with the base stage of transistor seconds Tr2 and receives
The other end of resistance R6；Another of this resistance R6 terminates described error amplifying circuit；Transistor seconds Tr2
Colelctor electrode be connected to the negative pole of second source V2；The positive pole of second source V2 and the first power supply V1's
Negative pole is connected, and another root being connected to described motor controls lead-in wire.
Position detecting device the most according to claim 1, it is characterised in that described potentiometer
All-in resistance RPAnd the relation between resistance R3 and resistance R4 meets: RP=R3+R4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310503776.0A CN103560717B (en) | 2013-10-23 | 2013-10-23 | Method for detecting position and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310503776.0A CN103560717B (en) | 2013-10-23 | 2013-10-23 | Method for detecting position and device |
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| CN103560717A CN103560717A (en) | 2014-02-05 |
| CN103560717B true CN103560717B (en) | 2016-09-07 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450110B (en) * | 2015-12-23 | 2020-03-10 | 中国科学院苏州生物医学工程技术研究所 | Direct current motor forward and reverse rotation control device |
| CN107612431B (en) * | 2017-09-28 | 2019-09-10 | 中国科学院长春光学精密机械与物理研究所 | A kind of control method and control system of electric steering engine |
| CN110874066B (en) * | 2018-08-31 | 2023-04-11 | 海能达通信股份有限公司 | Potentiometer precision control method and device, storage medium and electronic equipment |
| CN109969842B (en) * | 2019-04-12 | 2020-09-15 | 广东亨通光电科技有限公司 | Belt winding and unwinding device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4958129A (en) * | 1989-03-07 | 1990-09-18 | Ade Corporation | Prealigner probe |
| EP0992765A1 (en) * | 1998-10-09 | 2000-04-12 | Mahr GmbH | Inductive position measurement system |
| CN102412770A (en) * | 2010-09-26 | 2012-04-11 | 德昌电机(深圳)有限公司 | Motor device, electrical device and circuit |
| CN102914249A (en) * | 2012-11-07 | 2013-02-06 | 沈阳创达技术交易市场有限公司 | Straight-line displacement sensor |
-
2013
- 2013-10-23 CN CN201310503776.0A patent/CN103560717B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4958129A (en) * | 1989-03-07 | 1990-09-18 | Ade Corporation | Prealigner probe |
| EP0992765A1 (en) * | 1998-10-09 | 2000-04-12 | Mahr GmbH | Inductive position measurement system |
| CN102412770A (en) * | 2010-09-26 | 2012-04-11 | 德昌电机(深圳)有限公司 | Motor device, electrical device and circuit |
| CN102914249A (en) * | 2012-11-07 | 2013-02-06 | 沈阳创达技术交易市场有限公司 | Straight-line displacement sensor |
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