CN110031026A - A kind of novel capacitor position sensor detection circuit - Google Patents
A kind of novel capacitor position sensor detection circuit Download PDFInfo
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- CN110031026A CN110031026A CN201910310331.8A CN201910310331A CN110031026A CN 110031026 A CN110031026 A CN 110031026A CN 201910310331 A CN201910310331 A CN 201910310331A CN 110031026 A CN110031026 A CN 110031026A
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- circuit
- novel
- capacitor
- stretch
- position sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
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- General Physics & Mathematics (AREA)
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- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The invention discloses a kind of novel capacitor position sensor detection circuits, including capacitance sensing head, Novel wrist reconstitutes stretch circuit, filter circuit, power on deadlock-free circuit, working range adjusts circuit, output driving and collision detection circuit, capacitance sensing head is connected to Novel wrist and reconstitutes stretch circuit, Novel wrist reconstitutes stretch circuit for obtaining the relevant pulse-width-modulating signal in measured workpiece position, deadlock-free circuit is powered on for preventing the appearance of circuit deadlock state, filter circuit is for converting the signal into voltage signal and removing noise, working range adjusts circuit and user is facilitated to adjust detectable capacitance variations range, output driving is for providing stable voltage output for the use of subsequent control system, collision detection circuit is for providing collision output instruction.The present invention overcomes the defects of traditional pulse tune stretch circuit stability, realize low cost, high stability, the capacitance positions detection of high reliability.
Description
Technical field
The present invention relates to detection circuit related fields, specially a kind of novel capacitor position sensor detection circuit.
Background technique
Capacitive position sensor is usually used in various industrial lasers processed and applieds, the electricity between sensing head and intermetallic composite coating workpiece
Hold as corresponding change occurs for the change of the two spacing, this capacitance is obtained by capacitive position sensor, so that laser
System of processing can be with the distance between adjust automatically laser and workpiece.The most common capacitive position sensor needs a stabilization
High-frequency ac power, this brings difficulty to the realization of scheme and the acquisition of detection amount, improves system cost.Now design one kind
Novel capacitive position sensor detection circuit, the circuit are based on pulse width modulated principle, avoid the need to high-frequency ac power
It asks, detection output quantity is voltage output, reduces the demand of subsequent control circuit, overcomes traditional pulse tune stretch circuit stability
Defect, realize low cost, high stability, the capacitance positions detection of high reliability.
Summary of the invention
The purpose of the present invention is to provide a kind of novel capacitor position sensor detection circuits, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the invention provides the following technical scheme: a kind of novel capacitor position sensor detection circuit,
Stretch circuit, filter circuit are reconstituted including capacitance sensing head, Novel wrist, power on deadlock-free circuit, working range adjusting circuit, output
Driving and collision detection circuit, the capacitance sensing head are connected to Novel wrist and reconstitute stretch circuit, and the Novel wrist reconstitutes stretch circuit
For obtaining the relevant pulse-width-modulating signal in measured workpiece position, the deadlock-free circuit that powers on is for preventing circuit deadlock shape
The appearance of state, for the filter circuit for converting the signal into voltage signal and removing noise, the working range adjusts electricity
Road facilitates user to adjust detectable capacitance variations range, and the output driving is for providing stable voltage output for subsequent
Control system uses, and the collision detection circuit is for providing collision output instruction.
Preferably, it includes resistance R1, R2, diode D1, D2 that the Novel wrist, which reconstitutes stretch circuit, capacitor C1, C30, Gao Wen
Determine reference power source LM4040BIM3-2.5, comparator LM2903AVQPWRQ1 or door SN74LVC1G32DBV, trigger
SN74LVC2G74DCT and operational amplifier AD706, the R2 and D2 are to sensing head capacitor charge and discharge, and the R1 and D1 are to capacitor
C1, C30 charge and discharge, the high stable reference power source LM4040BIM3-2.5, comparator LM2903AVQPWRQ1 or door
SN74LVC1G32DBV, trigger SN74LVC2G74DCT are used for obtaining pulse-width-modulating signal, the operational amplifier AD706
In the pulse buffer tune bandwidth signals of acquisition are converted into voltage signal.
Preferably, the Novel wrist reconstitutes that the comparator U2 in stretch circuit passes through or door U3 for d type flip flop U1 provides clock
Input.
Preferably, the Novel wrist reconstitutes the capacitor C45 in stretch circuit for removing the frequency glitches in clock signal.
Preferably, it includes potentiometer that the working range, which adjusts circuit, and the potentiometer adjusts biasing for user
Voltage.
Preferably, the deadlock-free circuit that powers on includes triode Q2, resistance R34, R33 and capacitor C4.
Compared with prior art, the beneficial effects of the present invention are: a kind of novel capacitor position sensor detection electricity of the present invention
Road reconstitutes stretch circuit by the Novel wrist being arranged and makes trigger circuit with uniformity, improves the stability of system, reduces
System noise, it is therefore prevented that system malfunction bring deadlock, while the deadlock-free circuit that powers on being arranged can be realized and prevent from powering on
The function of deadlock is provided with working range adjusting circuit and user is facilitated to adjust detectable capacitance variations range, its work is made to exist
Best operating point, operation of the present invention is simple, overcomes the defect of traditional pulse tune stretch circuit stability, realizes low cost, high
Stability, the capacitance positions detection of high reliability.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is that Novel wrist of the invention reconstitutes stretch circuit；
Fig. 3 powers on deadlock-free circuit for of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-3 is please referred to, the present invention provides a kind of technical solution: a kind of novel capacitor position sensor detection circuit, packet
Include capacitance sensing head, Novel wrist reconstitutes stretch circuit, filter circuit, power on deadlock-free circuit, working range adjusts circuit, output is driven
Dynamic and collision detection circuit, the capacitance sensing head are connected to Novel wrist and reconstitute stretch circuit, and the Novel wrist reconstitutes stretch circuit use
In obtaining the relevant pulse-width-modulating signal in measured workpiece position, the deadlock-free circuit that powers on is for preventing circuit deadlock state
Appearance, for the filter circuit for converting the signal into voltage signal and removing noise, the working range adjusts circuit
User is facilitated to adjust detectable capacitance variations range, the output driving is for providing stable voltage output for subsequent control
System processed uses, and the collision detection circuit is for providing collision output instruction.
Further, it includes resistance R1, R2, diode D1, D2 that the Novel wrist, which reconstitutes stretch circuit, and capacitor C1, C30 are high
Stable reference power supply LM4040BIM3-2.5, comparator LM2903AVQPWRQ1 or door SN74LVC1G32DBV, trigger
SN74LVC2G74DCT and operational amplifier AD706, the R2 and D2 are to sensing head capacitor charge and discharge, and the R1 and D1 are to capacitor
C1, C30 charge and discharge, the high stable reference power source LM4040BIM3-2.5, comparator LM2903AVQPWRQ1 or door
SN74LVC1G32DBV, trigger SN74LVC2G74DCT are used for obtaining pulse-width-modulating signal, the operational amplifier AD706
In the pulse buffer tune bandwidth signals of acquisition are converted into voltage signal.
Further, the Novel wrist reconstitutes the comparator U2 in stretch circuit and passes through or when door U3 provides for d type flip flop U1
Clock input.
Further, the Novel wrist reconstitutes the capacitor C45 in stretch circuit for removing the frequency glitches in clock signal.
Further, it includes potentiometer that the working range, which adjusts circuit, and the potentiometer adjusts inclined for user
Set voltage.
Further, the deadlock-free circuit that powers on includes triode Q2, resistance R34, R33 and capacitor C4.
Working principle: a kind of novel capacitor position sensor detection circuit of the present invention, at work, the novel pulse of setting
Adjust stretch circuit by R2 and D2 to capacitance sensing head charge and discharge, by R1 and D1 to capacitor C1, C30 with high-temperature stability
Then charge and discharge pass through high stable reference power source LM4040BIM3-2.5, comparator LM2903AVQPWRQ1 or door
SN74LVC1G32DBV, trigger SN74LVC2G74DCT obtain pulse-width-modulating signal, which passes through operational amplifier AD706
The two stage filter circuit conversion of composition is at voltage signal and completes to filter.Wherein user can be adjusted in circuit by working range
Potentiometer adjusts bias voltage and changes measurable capacitance variations range.Filtered signal is all the way after clamper by operational amplifier
AD706 driving output, another way are defeated by one optional collision detection of low and high level of comparator LM2903AVQPWRQ1 output
Signal out, at the same it is different from traditional pulse tune stretch circuit, and the output that Novel wrist reconstitutes the comparator U2 in stretch circuit is not direct
As the input of rest-set flip-flop, but pass through or door U3 for d type flip flop U1 provides clock input so that trigger circuit have it is consistent
Property, the stability of system is improved, system noise is reduced.The capacitor C45 of setting can remove the high frequency hair in clock signal
Thorn, it is therefore prevented that system malfunction bring deadlock, in system electrification, power on deadlock-free circuit by with door U2 by trigger U1
Clock be placed in low level, be at idle state, until system electrification is completed, the output of comparator U2 could conduct
Clock causes the state of trigger U1 to be converted, to realize the function of preventing from powering on deadlock.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of novel capacitor position sensor detection circuit, it is characterised in that: reconstitute wide electricity including capacitance sensing head, Novel wrist
Road, filter circuit power on deadlock-free circuit, working range adjusting circuit, output driving and collision detection circuit, the capacitor biography
Sense head is connected to Novel wrist and reconstitutes stretch circuit, and the Novel wrist reconstitutes stretch circuit for obtaining the relevant arteries and veins in measured workpiece position
Bandwidth signals are reconstituted, for the deadlock-free circuit that powers on for preventing the appearance of circuit deadlock state, the filter circuit is used for should
Signal is converted into voltage signal and removes noise, and the working range adjusts circuit and user is facilitated to adjust detectable capacitance variations
Range, the output driving is for providing stable voltage output for the use of subsequent control system, the collision detection circuit
Output instruction is collided for providing.
2. a kind of novel capacitor position sensor detection circuit according to claim 1, it is characterised in that: the Novel wrist
Reconstituting stretch circuit includes resistance R1, R2, diode D1, D2, capacitor C1, C30, high stable reference power source LM4040BIM3-2.5,
Comparator LM2903AVQPWRQ1 or door SN74LVC1G32DBV, trigger SN74LVC2G74DCT and operational amplifier
AD706, the R2 and D2 are to sensing head capacitor charge and discharge, the R1 and D1 to capacitor C1, C30 charge and discharge, the high stable reference
Power supply LM4040BIM3-2.5, comparator LM2903AVQPWRQ1 or door SN74LVC1G32DBV, trigger
SN74LVC2G74DCT is used for the pulse buffer tune that will be obtained for obtaining pulse-width-modulating signal, the operational amplifier AD706
Bandwidth signals are converted into voltage signal.
3. a kind of novel capacitor position sensor detection circuit according to claim 1, it is characterised in that: the Novel wrist
Reconstitute the comparator U2 in stretch circuit pass through or door U3 for d type flip flop U1 provide clock input.
4. a kind of novel capacitor position sensor detection circuit according to claim 1, it is characterised in that: the Novel wrist
The capacitor C45 in stretch circuit is reconstituted to be used to remove the frequency glitches in clock signal.
5. a kind of novel capacitor position sensor detection circuit according to claim 1, it is characterised in that: the work model
Enclosing adjusting circuit includes potentiometer, and the potentiometer adjusts bias voltage for user.
6. a kind of novel capacitor position sensor detection circuit according to claim 1, it is characterised in that: it is described power on it is anti-
Deadlock circuit includes triode Q2, resistance R34, R33 and capacitor C4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910310331.8A CN110031026B (en) | 2019-04-17 | 2019-04-17 | Capacitance position sensor detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910310331.8A CN110031026B (en) | 2019-04-17 | 2019-04-17 | Capacitance position sensor detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110031026A true CN110031026A (en) | 2019-07-19 |
| CN110031026B CN110031026B (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910310331.8A Active CN110031026B (en) | 2019-04-17 | 2019-04-17 | Capacitance position sensor detection circuit |
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Citations (6)
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|---|---|---|---|---|
| JPH02263169A (en) * | 1988-07-21 | 1990-10-25 | General Electric Co <Ge> | Method and apparatus for detecting drop in input voltage into power source device |
| CN101764511A (en) * | 2009-12-25 | 2010-06-30 | 天津市诺尔电气有限公司 | Pulse width modulation signal voltage converting circuit |
| CN102825365A (en) * | 2012-09-12 | 2012-12-19 | 湘潭大学 | Automatic tracking system and method of welding line based on capacitive transducer |
| CN103090892A (en) * | 2011-10-31 | 2013-05-08 | 宋宏宇 | Capacitance type sensor detecting method and capacitance type sensor system |
| CN103513283A (en) * | 2012-06-28 | 2014-01-15 | 博泽哈尔施塔特汽车零件两合公司 | Capacitive sensor for an anti-collision apparatus |
| CN107478859A (en) * | 2017-06-27 | 2017-12-15 | 浙江大学 | A kind of pulsewidth is double to add square type acceleration sensor circuit |
-
2019
- 2019-04-17 CN CN201910310331.8A patent/CN110031026B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02263169A (en) * | 1988-07-21 | 1990-10-25 | General Electric Co <Ge> | Method and apparatus for detecting drop in input voltage into power source device |
| CN101764511A (en) * | 2009-12-25 | 2010-06-30 | 天津市诺尔电气有限公司 | Pulse width modulation signal voltage converting circuit |
| CN103090892A (en) * | 2011-10-31 | 2013-05-08 | 宋宏宇 | Capacitance type sensor detecting method and capacitance type sensor system |
| CN103513283A (en) * | 2012-06-28 | 2014-01-15 | 博泽哈尔施塔特汽车零件两合公司 | Capacitive sensor for an anti-collision apparatus |
| CN102825365A (en) * | 2012-09-12 | 2012-12-19 | 湘潭大学 | Automatic tracking system and method of welding line based on capacitive transducer |
| CN107478859A (en) * | 2017-06-27 | 2017-12-15 | 浙江大学 | A kind of pulsewidth is double to add square type acceleration sensor circuit |
Non-Patent Citations (2)
| Title |
|---|
| 刘强等: "电容传感器激光焦点检测误差分析", 《工业仪表与自动化装置》 * |
| 葛伟亮编著: "《自动控制元件》", 31 May 2004 * |
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| Publication number | Publication date |
|---|---|
| CN110031026B (en) | 2021-07-02 |
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