CN1414340A - Displacement measuring sensor - Google Patents
Displacement measuring sensor Download PDFInfo
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- CN1414340A CN1414340A CN 02134130 CN02134130A CN1414340A CN 1414340 A CN1414340 A CN 1414340A CN 02134130 CN02134130 CN 02134130 CN 02134130 A CN02134130 A CN 02134130A CN 1414340 A CN1414340 A CN 1414340A
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- moving
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- coil winding
- displacement
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 73
- 239000004020 conductor Substances 0.000 claims abstract description 38
- 238000004804 winding Methods 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 238000007493 shaping process Methods 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention relates to a sensor for measuring displacements belonging to the fine measurement device of displacements. The magnetic field of the travelling wave is adopted to build the moving coordinate system. The coil winding with AC current being provided forms the magnetic field of the travelling wave. The coil winding is as the fixed scale, and the moving piece in the magnetic field of the travelling wave is as the moving scale. The conductors fixed on the fixed scale and the moving scale respectively constitutes the conductor of the fixed measuring head and the conductor of the moving measuring head. The output end of the said two measuring heads are connected to the input end of the signal multiplication shaping circuit.
Description
Technical field
The invention belongs to the device of displacement precision measurement, be specifically related to a kind of displacement measurement sensor that is used to measure straight-line displacement and angular displacement.
Technical background
It is the most basic, prevailing measurement that displacement (straight-line displacement or angular displacement) is measured.In order to take into account Measurement Resolution and range, many displacement transducers have adopted the grid formula structure of accurate groove on matrix, as grating, magnetic grid etc., its pulse signal that sends in motion process are carried out accumulated counts, promptly realize displacement measurement.The highdensity groove of high precision causes a lot of problems, and on the one hand groove is close more, just easy pollution the more.Seal protection no matter how, under the bad working environments of production scene, its small dust greasy dirt aqueous vapor all may be polluted grid line, makes it counting loss.On the other hand, groove can not be ad infinitum close, and existing density far can not satisfy the requirement of resolution.Therefore segmentation case, system architecture complexity have been forced to generally adopt electric.Add high-precision groove technology, make cost high.In sum, the shortcoming that exists of existing grid formula displacement transducer is: price height, complex structure, interference resistance are poor.
Summary of the invention
The objective of the invention is to provides a kind of sensor of new construction Displacement Measurement at above-mentioned the deficiencies in the prior art, need not accurate groove, thereby price is low, simple in structure, interference resistance is strong.
Technical scheme of the present invention is: adopt travelling-magnetic-field to set up the uniform motion coordinate system.Travelling-magnetic-field is the principle of work according to alternating current generator, passes in coil winding that alternating current produces.The structure of this survey sensor be will be wound with coil winding shell as scale, the gap location between arbitrary adjacent windings winding is adorned a lead as location survey head conductor, the two ends of location survey head conductor are as the output terminal of periodic raw electrical signal; Moving chi with respect to the scale motion is set in travelling-magnetic-field in addition, adorns a conductor as moving gauge head conductor on moving chi, the two ends of moving gauge head conductor are as the output terminal of periodicity raw electrical signal, and said structure promptly constitutes the survey sensor part.
Said structure can be two kinds of forms, and a kind of is the angle displacement measurement sensor, and the coil winding on its scale is to be evenly distributed in the circular shell by circumference, and moving chi is a rotor or rotating shaft.Another kind is the straight-line displacement survey sensor, and its scale is to launch to constitute by straight line simultaneously with above-mentioned housing with by the equally distributed coil winding of circumference, and moving chi is with respect to scale moving linearly slide rule in travelling-magnetic-field.
Output terminal on the sensor location survey head conductor is connected with the input end of signal amplification shaping circuit with output terminal on the moving gauge head conductor, and the output terminal of this circuit is connected with input end than circuitry phase.When the travelling-magnetic-field of continuous persistent movement through out-of-date, because of making on two gauge heads, the magnetic force line cutting effect induces electric signal respectively, by amplification and rectification circuit above-mentioned two paths of signals is shaped to for ease of carrying out the waveform of phase bit comparison, by recording the phase differential of two paths of signals than circuitry phase, thus position poor of having reflected scale and moving chi.
Advantage of the present invention is that antijamming capability is strong, measuring accuracy is high, volume is little, simple in structure, is easy to the commercialization exploitation.
Description of drawings
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 moving chi of angle displacement measurement sensor and the front view after the assembling of moving gauge head conductor;
Fig. 4 is the moving chi of angle displacement measurement sensor and the vertical view after the assembling of moving gauge head conductor;
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 moving chi of straight-line displacement survey sensor and the front view after the assembling of moving gauge head conductor;
Fig. 8 is the moving chi of straight-line displacement survey sensor and the vertical view after the assembling of moving gauge head conductor;
Fig. 9 is than phase signals oscillogram.
Embodiment:
In Fig. 1 to Fig. 9:
1-1---the angular displacement scale U---alternating voltage of input coil winding
1-2---angular displacement coil winding M---travelling-magnetic-field
1-3---angular displacement iron-core coil Ω---steady rotation speed
1-4---chi ω is moved in angular displacement---is rotational speed arbitrarily
1-5---gauge head conductor Δ θ is moved in angular displacement---angular displacement
1-6---angular displacement location survey head conductor V---linear uniform motion speed
P
5---moving gauge head square-wave signal Δ L---straight-line displacement
P
6The signal phase difference that---location survey head square-wave signal Δ T---represents 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 straight-line displacement to 2-3---straight-line displacement iron-core coil 2-4---
2-5---gauge head conductor 2-6 is moved in straight-line displacement---straight-line displacement location survey head conductor
Embodiment 1
Referring to Fig. 1,2,3,4 and Fig. 9, structure for the angle displacement measurement sensor, this sensor be a same angular displacement magnetic bobbin core 1-3 with alternating current generator go up angular displacement coil winding 1-2 by circumference uniform distribution in circular housing as angular displacement scale 1-1, with the commentaries on classics of alternating current generator or add rotating shaft in addition and move chi 1-4 as angular displacement.Gap location between arbitrary adjacent windings of angular displacement scale 1-1 is fixed an angular displacement location survey head conductor 1-6, and the two ends of this conductor are connected with the input end of signal transformation circuit by insulated conductor as the output terminal of location survey head.Fix the moving gauge head conductor 1-5 of an angular displacement on the moving chi 1-4 of angular displacement, the two ends of this conductor are connected with the input end of signal amplification shaping circuit by insulated conductor as the output terminal of moving gauge head.When angular displacement coil winding 1-2 passes to alternating current, will in angular displacement scale 1-1 internal clearance, produce rotary traveling wave magnetic field M, its steady rotation speed is Ω, this speed depends on ac frequency.Whenever rotary traveling wave magnetic field during through the moving gauge head conductor 1-5 of angular displacement location survey head conductor 1-6 and angular displacement, because of the magnetic line of force is cut, according to the right-hand rule, two leads will produce electric potential signal respectively, with this as moving gauge head periodicity original signal A
5With location survey head periodicity original signal A
6Again this two-way original signal amplification and waveform arrangement are moving gauge head square-wave signal P
5With location survey head square-wave signal P
6Because angular displacement location survey head conductor 1-6 keeps motionless in angular displacement scale 1-1, so the maintenance of location survey head square-wave signal phase place is motionless; And the moving gauge head conductor 1-5 of angular displacement rotates with any rotational speed ω and any direction with the moving chi 1-4 of angular displacement, and moving gauge head square-wave signal period T is corresponding with 360 ° of circumference in space.Now represent the phase differential of two paths of signals with mistiming Δ T, then angular displacement is
Fig. 5,6,7,8 and Fig. 9 is straight-line displacement survey sensor structure, and the principle of work of straight-line displacement survey sensor and embodiment 1 are identical.Different is, the shell of alternating current generator with press straight-line displacement coil winding 2-2 on the equally distributed straight-line displacement iron-core coil of the circumference 2-3 and press straight line simultaneously and launch to constitute straight-line 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 is fixed a straight-line displacement location survey head conductor 2-6; The moving chi 2-4 of straight-line displacement is the slide rule of moving linearly in the travelling-magnetic-field that passes to alternating current at straight-line displacement coil winding 2-2 and produce, fix a moving gauge head conductor 2-5 of the straight-line displacement with the moving chi 2-4 moving linearly of straight-line displacement on the moving chi body, the movement velocity of travelling-magnetic-field M represents that with V the arbitrary line travelling speed of the moving chi 2-4 of straight-line displacement is represented with v.When one group of line chart distance L of the every motion of travelling-magnetic-field M, then repeat the moving gauge head conductor 2-5 of cutting straight line displacement location survey head conductor 2-6 and straight-line displacement once, the square-wave signal period T that obtains thus is corresponding with space length L, represents the phase differential of two paths of signals with time quantum Δ T, and then straight-line displacement is
Claims (3)
1. displacement measurement sensor, comprise scale and moving chi, it is characterized in that scale is the housing that contains coil winding, coil winding passes to alternating current and produces travelling-magnetic-field, gap location between arbitrary adjacent coil winding is adorned a conductor as location survey head conductor, and these conductor two ends are the periodically output terminal of raw electrical signal of location survey head; Be provided with the moving chi with respect to the scale motion in travelling-magnetic-field, a conductor be housed as moving gauge head conductor on the moving chi, these conductor two ends are the periodically output terminal of raw electrical signal of moving gauge head.
2. displacement measurement sensor according to claim 1, the coil winding that it is characterized in that scale are to be evenly distributed in the circular shell by circumference, and moving chi is a rotor or rotating shaft.
3. displacement measurement sensor according to claim 1 is characterized in that scale is launch to constitute by straight line simultaneously with housing with by the equally distributed coil winding of circumference, and moving chi is with respect to the slide rule of scale moving linearly in travelling-magnetic-field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02134130 CN1414340A (en) | 2002-11-20 | 2002-11-20 | Displacement measuring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02134130 CN1414340A (en) | 2002-11-20 | 2002-11-20 | Displacement measuring sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1414340A true CN1414340A (en) | 2003-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02134130 Pending CN1414340A (en) | 2002-11-20 | 2002-11-20 | Displacement measuring sensor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394143C (en) * | 2006-03-24 | 2008-06-11 | 重庆工学院 | Tooth electric time grating sensor |
| CN102620636A (en) * | 2012-03-01 | 2012-08-01 | 清华大学 | Rotor displacement measuring method based on motor magnetic field model |
| CN103868450A (en) * | 2012-12-18 | 2014-06-18 | 法国大陆汽车公司 | Inductive sensor for angular measurement of the position of a moving part and measuring method using such a sensor |
| CN104677258A (en) * | 2014-09-30 | 2015-06-03 | 重庆理工大学 | Two-dimensional plane displacement sensor |
| CN107923769A (en) * | 2015-07-21 | 2018-04-17 | 伊莱克特里克菲儿汽车公司 | Sensor for the absolute position for measuring moving parts |
| CN117367258A (en) * | 2023-08-31 | 2024-01-09 | 重庆理工大学 | Displacement sensor for magnetic field type angular displacement and linear displacement combined measurement |
-
2002
- 2002-11-20 CN CN 02134130 patent/CN1414340A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394143C (en) * | 2006-03-24 | 2008-06-11 | 重庆工学院 | Tooth electric time grating sensor |
| CN102620636A (en) * | 2012-03-01 | 2012-08-01 | 清华大学 | Rotor displacement measuring method based on motor magnetic field model |
| CN102620636B (en) * | 2012-03-01 | 2014-06-18 | 清华大学 | Rotor displacement measuring method based on motor magnetic field model |
| CN103868450A (en) * | 2012-12-18 | 2014-06-18 | 法国大陆汽车公司 | Inductive sensor for angular measurement of the position of a moving part and measuring method using such a sensor |
| CN103868450B (en) * | 2012-12-18 | 2018-07-17 | 法国大陆汽车公司 | The angular measurement inductance sensor that motive position is set and the measurement method with this sensor |
| CN104677258A (en) * | 2014-09-30 | 2015-06-03 | 重庆理工大学 | Two-dimensional plane displacement sensor |
| CN107923769A (en) * | 2015-07-21 | 2018-04-17 | 伊莱克特里克菲儿汽车公司 | Sensor for the absolute position for measuring moving parts |
| CN117367258A (en) * | 2023-08-31 | 2024-01-09 | 重庆理工大学 | Displacement sensor for magnetic field type angular displacement and linear displacement combined measurement |
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