CN104654994A - Displacement measuring sensor - Google Patents
Displacement measuring sensor Download PDFInfo
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- CN104654994A CN104654994A CN201310577036.1A CN201310577036A CN104654994A CN 104654994 A CN104654994 A CN 104654994A CN 201310577036 A CN201310577036 A CN 201310577036A CN 104654994 A CN104654994 A CN 104654994A
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- displacement
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Abstract
The invention discloses a displacement measuring sensor, and belongs to a fine displacement measuring device. The magnetic field of the travelling wave is adopted to build the moving coordinate system. The coil winding with AC being provided forms the magnetic field of the travelling wave. The coil winding serves as the fixed scale, and the moving piece in the magnetic field of the travelling wave serves as the moving scale. Conductors fixed on the fixed scale and the moving scale respectively constitute the conductor of the fixed measuring head and the conductor of the moving measuring head. The output ends of the two measuring heads are connected to the input end of the signal multiplication shaping circuit. The displacement measuring sensor solves the problems of high price, complicated structure and poor anti-interference ability in the prior art, and has the advantages of strong anti-interference ability, small size, simplified structure and easy productization.
Description
Technical field
The present invention relates to one and belong to accurate displacement measurement device, being specifically related to a kind of displacement measurement sensor for measuring straight-line displacement and angular displacement.
Background technology
It is the most basic, prevailing measurement that displacement (straight-line displacement and angular displacement) is measured.In order to take into account Measurement Resolution and range, many displacement transducers have employed the grating structure at accurate groove substantially, as grating, magnetic grid etc., carry out accumulated counts, namely realize displacement measurement to its pulse signal sent in motion process.The highdensity groove of high precision causes a lot of problem, and groove is closeer on the one hand is more easily polluted, and seal protection in any case, under the bad working environments of production scene, its small dust greasy dirt aqueous vapor all may pollute grid line, makes counting loss.On the other hand, groove can not be ad infinitum close, and existing density far can not meet the requirement of resolution.Therefore be forced to generally adopt electronic features branch mailbox, system architecture is complicated, adds high-precision groove technique, and cost is remained high.In sum, the shortcoming that existing grating displacement measurement sensor exists is: price is high, complex structure, interference resistance are poor.
Summary of the invention
The object of the invention is to for above-mentioned the deficiencies in the prior art, provide a kind of new construction to measure the sensor of displacement, need not accurate groove, thus price is low, structure is simple, interference resistance is strong.
Technical scheme of the present invention is: adopt travelling-magnetic-field to set up average rate fortune merit coordinate system.Travelling-magnetic-field is the principle of work according to alternating current generator, pass in coil winding alternating current produce.The structure of this survey sensor to be wound with the shell of coil winding as scale, and the gap location between arbitrary adjacent coil winding fills a conductor as location survey head conductor, and the two ends of location survey head conductor are as the output terminal of periodicity raw electrical signal; The another dynamic chi arranged in travelling-magnetic-field relative to scale motion, dynamic chi is equipped with a conductor as dynamic gauge head conductor, and move the output terminal of two ends as periodicity raw electrical signal of gauge head conductor, namely said structure forms survey sensor part.
Said structure can be two kinds of forms, and one is angle displacement measurement sensor, and the coil winding on its scale is circumferentially evenly distributed in circular shell, and dynamic chi is a rotor or rotating shaft.Another kind is straight-line displacement survey sensor, and its scale is launched to form by straight line simultaneously the coil winding of above-mentioned housing and even circumferential distribution, and dynamic chi is the slide rule relative to scale moving linearly in travelling-magnetic-field.
Output terminal on sensor location survey head conductor is connected with the input end of signal amplification shaping circuit with the output terminal on dynamic gauge head conductor, and the output terminal of this circuit is connected with the input end than circuitry phase.When the travelling-magnetic-field of continuous persistent movement is through out-of-date, because magnetic force line cutting effect makes two side heads induce electric signal respectively, by amplification and rectification circuit by the waveform of signal shaping one-tenth in above-mentioned two ends for ease of phase compare, at the phase differential by recording two paths of signals than circuitry phase, thus reflect the difference of the phase place of scale and dynamic chi.
Advantage of the present invention is that antijamming capability is strong, measuring accuracy is high, volume is little, structure is simple, is easy to product development.
Accompanying drawing explanation
Fig. 1 is the vertical view of angle displacement measurement sensor.
Fig. 2 is the planimetric map after the scale coil winding of angle displacement measurement sensor is launched.
Fig. 3 is the front view after the surely dynamic chi of angle displacement measurement sensor and dynamic gauge head conductor are equipped with.
Fig. 4 is the vertical view after the surely dynamic chi of angle displacement measurement sensor and dynamic gauge head conductor are equipped with.
Fig. 5 is the vertical view of straight-line displacement survey sensor.
Fig. 6 is the planimetric map after the scale coil winding of straight-line displacement survey sensor is launched.
Fig. 7 is the front view after the dynamic chi of straight-line displacement survey sensor and dynamic gauge head conductor are equipped with.
Fig. 8 is the vertical view after the dynamic chi of straight-line displacement survey sensor and dynamic gauge head conductor are equipped with.
Fig. 9 is than phase signals oscillogram.
In figure:
The alternating voltage of 1-1-angular displacement scale U-input coil winding
1-2-angular displacement coil winding M-travelling-magnetic-field
1-3-angular displacement iron-core coil Ω-Rotating with Uniform speed
Chi ω-rotational speed is arbitrarily moved in 1-4-angular displacement
Gauge head conductor △ θ-angular displacement is moved in 1-5-angular displacement
1-6-angular displacement location survey head conductor V-uniform rectilinear movement velocity
P5--dynamic gauge head square-wave signal △ L-straight-line displacement
The signal phase difference of P6--location survey head square-wave signal △ T-represent with time quantum
T---time T---signal period
2-1-straight-line displacement scale 2-2-straight-line displacement coil winding
Chi is moved in 2-3-straight-line displacement iron-core coil 2-4-straight-line displacement
Gauge head conductor 2-6-straight-line displacement location survey head conductor is moved in 2-5-straight-line displacement
Embodiment
Embodiment 1
See Fig. 1,2,3,4 and Fig. 9, the structure of angle displacement measurement sensor.This sensor is that angular displacement coil winding 1-2 on angular displacement iron-core coil 1-3 the same for alternating current generator is circumferentially evenly distributed on as angular displacement scale 1-1 in circular shell, using the rotor of alternating current generator or separately add rotating shaft and move chi 1-4 as angular displacement.Gap location between the arbitrary adjacent coil of angular displacement scale 1-1 fixes an angular displacement location survey head conductor 1-6, and the two ends of this conductor, as the output terminal of location survey head, are connected with the input end of signal transformation circuit by insulated conductor.Move in angular displacement and chi 1-4 fixes an angular displacement move gauge head conductor 1-5, the two ends of this conductor, as the output terminal of dynamic gauge head, are connected with the input end of signal transformation circuit by insulated conductor.When angular displacement coil winding 1-2 passes to alternating current, will produce rotary traveling wave magnetic field M in angular displacement scale 1-1 internal clearance, its Rotating with Uniform speed is Ω, and this speed depends on ac frequency.Whenever gauge head conductor 1-5 is moved through angular displacement location survey head conductor 1-6 and angular displacement in rotary traveling wave magnetic field, because the magnetic line of force is cut, according to the right-hand rule, two wires will produce electric potential signal respectively, in this, as dynamic gauge head periodically raw electrical signal A
5with location survey head periodically raw electrical signal A
6.Again the amplification of this two-way raw electrical signal and waveform are arranged as dynamic gauge head square-wave signal P
5with location survey head square-wave signal P
6.Because angular displacement location survey head conductor 1-6 keeps motionless in angular displacement scale 1-1, so location survey head square-wave signal phase place keeps motionless; And angular displacement is moved gauge head conductor 1-5 and moved chi 1-4 with any rotational speed ω and any direction with angular displacement and rotate, dynamic gauge head square-wave signal cycle T is corresponding with one, space circumference 360 °.Now represent the phase differential of two paths of signals with mistiming △ T, angular displacement is △ θ
Then:
Embodiment 2
Fig. 5,6,7,8 and Fig. 9, for being straight-line displacement survey sensor structure, the principle of work of straight-line displacement survey sensor is identical with embodiment 1.Be not both, the shell of alternating current generator and the straight-line displacement coil winding 2-2 circumferentially on equally distributed straight-line displacement iron-core coil 2-3 are pressed straight line simultaneously launch to form displacement scale 2-1, the gap location between arbitrary adjacent straight displacement of the lines coil winding 2-2 of straight-line displacement scale 2-1 fixes a straight-line displacement location survey head conductor 2-6, it is the slide rule passing to moving linearly in travelling-magnetic-field that alternating current produces at straight-line displacement coil winding 2-2 that chi 2-4 is moved in straight-line displacement, dynamic chi body is fixed a straight-line displacement moving chi 2-4 moving linearly with straight-line displacement and move gauge head conductor 2-5, the movement velocity of travelling-magnetic-field M represents with V, the arbitrary line movement velocity v that chi 2-4 is moved in straight-line displacement represents. when travelling-magnetic-field M often moves one group of line chart distance L, then repetition cutting straight line displacement location survey head conductor 2-6 and straight-line displacement move gauge head conductor 2-5 once, the square-wave signal cycle T obtained thus is corresponding with space length L, the phase differential of two paths of signals is represented with time quantum △ T, then straight-line displacement is
Claims (1)
1. displacement measurement sensor, is characterized in that: comprise scale and dynamic chi, and scale is the housing containing coil winding, and coil winding passes to alternating current and produces travelling-magnetic-field, and the gap location between arbitrary adjacent coil winding fills a conductor as location survey head conductor.These conductor two ends are the output terminal of location survey head periodicity raw electrical signal; In travelling-magnetic-field, be provided with the dynamic chi relative to scale motion, dynamic chi is equipped with a conductor as dynamic gauge head conductor, these conductor two ends are the output terminal of gauge head periodicity raw electrical signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310577036.1A CN104654994A (en) | 2013-11-15 | 2013-11-15 | Displacement measuring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310577036.1A CN104654994A (en) | 2013-11-15 | 2013-11-15 | Displacement measuring sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104654994A true CN104654994A (en) | 2015-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310577036.1A Pending CN104654994A (en) | 2013-11-15 | 2013-11-15 | Displacement measuring sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109073691A (en) * | 2016-02-22 | 2018-12-21 | 克诺尔商用车制动系统有限公司 | The method and apparatus of at least one characteristic for measuring coil, position for measuring control member method and apparatus and motor vehicle |
-
2013
- 2013-11-15 CN CN201310577036.1A patent/CN104654994A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109073691A (en) * | 2016-02-22 | 2018-12-21 | 克诺尔商用车制动系统有限公司 | The method and apparatus of at least one characteristic for measuring coil, position for measuring control member method and apparatus and motor vehicle |
| US11181565B2 (en) | 2016-02-22 | 2021-11-23 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Method and device for measuring at least one property of a coil, method and device for measuring the position of an actuation member, and motor vehicle |
| CN109073691B (en) * | 2016-02-22 | 2022-01-11 | 克诺尔商用车制动系统有限公司 | Method and device for measuring at least one characteristic of a coil, method and device for measuring the position of an operating member, and motor vehicle |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |
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| WD01 | Invention patent application deemed withdrawn after publication |