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CN107367222A - The inductance sensor calibration method and device of current vortex sensor linearity compensation - Google Patents

The inductance sensor calibration method and device of current vortex sensor linearity compensation Download PDF

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Publication number
CN107367222A
CN107367222A CN201610311974.0A CN201610311974A CN107367222A CN 107367222 A CN107367222 A CN 107367222A CN 201610311974 A CN201610311974 A CN 201610311974A CN 107367222 A CN107367222 A CN 107367222A
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CN
China
Prior art keywords
displacement
sensor
guide rail
motion
eddy current
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CN201610311974.0A
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Chinese (zh)
Inventor
王雷
谭久彬
赵勃
孙传智
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Harbin Institute of Technology Shenzhen
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Harbin Institute of Technology Shenzhen
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Priority to CN201610311974.0A priority Critical patent/CN107367222A/en
Publication of CN107367222A publication Critical patent/CN107367222A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

电涡流传感器直线度补偿的电感传感器校准方法与装置属于精密测量技术领域。其校准方法与装置以双频激光干涉仪作为运动基准,直流电机与滚珠丝杠作为宏动驱动元件,滚珠导轨作为宏动导向元件,直线光栅尺作为宏动反馈元件进行宏动粗定位;采用音圈电机作为微动驱动元件,气浮导轨作为微动导向元件,双频激光干涉仪与直线光栅尺作为微动反馈元件进行微动精定位,补偿宏动定位误差。利用四个电涡流传感器补偿宏微定位平台运动的俯仰与偏航误差;本发明可以有效解决位移传感器校准装置行程与精度之间的矛盾,实现大行程、高精度电感位移传感器的动静态校准。

An inductance sensor calibration method and device for straightness compensation of an eddy current sensor belong to the technical field of precision measurement. Its calibration method and device use a dual-frequency laser interferometer as a motion reference, a DC motor and a ball screw as a macro-motion drive component, a ball guide rail as a macro-motion guiding component, and a linear grating as a macro-motion feedback component for macro-motion coarse positioning; The voice coil motor is used as the micro-motion driving element, the air-floating guide rail is used as the micro-motion guiding element, and the dual-frequency laser interferometer and linear grating scale are used as the micro-motion feedback element to perform micro-motion fine positioning and compensate for macro-motion positioning errors. Four eddy current sensors are used to compensate the pitch and yaw errors of the macro-micro positioning platform movement; the invention can effectively solve the contradiction between the stroke and precision of the displacement sensor calibration device, and realize the dynamic and static calibration of the large-stroke, high-precision inductive displacement sensor.

Description

The inductance sensor calibration method and device of current vortex sensor linearity compensation
Technical field
The invention belongs to Technology of Precision Measurement field, relates generally to a kind of current vortex sensor linearity compensation Inductance sensor calibration method and device.
Background technology
At present, Chinese large-sized revolution at a high speed equipment does not have ultra precise measurement means, and assembly precision can not ensure, Efficiency of assembling is low, engine luggine noise etc., and these are all to restrict China's war industry and national economy hair The great difficult problem of exhibition.Large high-speed revolution equipment refers mainly to all kinds of large-scale high-end gas-turbine units, mainly Including aero-engine, warship marine gas turbine and high-performance power station combustion engine.At present, Aeroengine Industries War industry and the mainstay of the national economy industry of World Airways power are turned into.Aero-engine is pursuing height On the premise of performance, the high quality, high reliability and long service live of product are also pursued, will both ten Divide difficult and conflicting target to take into account, and be improved simultaneously, be very difficult;In addition Aero-engine works in extreme environment, and key components and parts are worked under high temperature, high pressure, great loading capacity, Therefore the difficulty of design and the manufacture of aero-engine further increases.
Engine luggine is a key factor for influenceing aircraft safety, and reacts a weight of engine performance Want index.Engine turbine component speed is high, quality is big, is a main vibration source of engine.In order to drop This low influence, except being eliminated during engine dynamic balancing measurement, it is necessary to strictly control its assembling Process, because engine assembly is dynamically balanced previous step, cause to shake by assembly Form and position error precision is low Can be amplified when running at high speed by moving by 100 to 1000 times, and beat caused by eliminating concentricity/axiality during assembling can Largely to reduce dynamically balanced pressure.So the key technology as lifting aero-engine performance, The accurate measurement of concentricity/axiality or even cylindricity is increasingly taken seriously in aero-engine assembling process.
Sensor is in concentricity/axiality as the extraction element of the sub- surface profile information of aero-engine sound Accurate measurement to cylindricity is just particularly important, mechanical system and circuit system the institute band of displacement transducer An important factor for error come is limiting sensor precision, in order to suppress or compensate these errors, it is necessary to align Displacement sensor carries out calibration process, can be traceable on the benchmark of higher precision.Realize to high accuracy The calibration of displacement transducer is, it is necessary to design a displacement transducer calibration system with higher precision.Respectively Stroke between kind displacement transducer also has larger difference, and some displacement transducer strokes can reach tens millis Even several meters of rice, some then can only achieve several microns of stroke.Therefore, need to make calibration system have big stroke, High-precision feature could meet the calibration requirements of nano-sensor.But stroke and precision inherently contradiction , this also increases the design difficulty of calibration system, and there is an urgent need to big stroke, high precision displacement biography at present The reason for sensor calibration system.
Changchun Institute of Optics, Fine Mechanics and Physics, CAS proposes that a kind of demarcation capacity plate antenna displacement passes Device (the capacity plate antenna calibration device for displacement sensor of sensor.Publication number:CN104048588A).The dress Put and be arranged on guiding mechanism front end as displacement datum, sensor tested surface using one-axis laser interferometer, lead The symmetrical parallel quadrangular mechanism of Planar Mechanisms is used to mechanism, capacity plate antenna displacement transducer is arranged on sensor Among support base, support base is arranged on micro-displacement adjustment mechanism both sides, and driving is provided with the left end of driver Device push rod, the guiding mechanism of the driver push rod pushing tow micro-displacement adjustment mechanism do single-degree-of-freedom linear motion, And then realize the demarcation to capacity plate antenna displacement transducer.The device has problems in that:It is only limited to flat Plate capacitance displacement sensor is demarcated, and it is smaller to demarcate stroke.
It is (straight that Changzhou Institute of Measurement & Testing Technology proposes a kind of device for linear displacement transducer calibration Linear movement pick-up auto-calibration device.Publication number:CN103630099A).The device mainly includes one Pedestal, bilinear guide rail, grating scale, servomotor, vertical lift device are fixed on pedestal;Roller bearing silk Bar is connected by shaft coupling with servomotor;Leveling device, universal fixturing, locking nut are snapped into one another And it is connected with vertical lift device;Slidingtype laser mirror support frame, slidingtype laser interference mirror support frame, Slidingtype two-frequency laser interferometer support frame is fixed on line slideway, wherein steady brace, laser mirror, Grating rule read sensor is fixed on slidingtype reflector support, and laser interference mirror is fixed on slidingtype and done Mirror support frame is related to, two-frequency laser interferometer is fixed on slidingtype two-frequency laser interferometer support frame, Ke Yishi The now automatic calibration to the polytype linear displacement transducer such as rod-pulling type, dragline type and calibration.The device Have problems in that:Stroke and precision index are not taken into account, precision is relatively low, can not realize high precision displacement Pick up calibration.
German federal physical technique institute (PTB) and Physik-Instrumente companies cooperate, and develop a kind of use In the novel sports device of contact type probe displacement transducer dynamic property calibration, the probe displacement transducer can To use in topography measurement, surface profile measurement and measurement of coordinates.The device has that size is small, and integrated level is high The characteristics of, system produces motion using piezoelectric ceramic tube, and is measured in real time by a mini optical fibre interferometer, Measurement feedback to DSP Processor is realized into closed-loop control, therefore, the calibration platform can be traceable to state Family length standard (Rong Liang, Otto Jusko, Frank Ludicke, Michael Neugebauer.A novel piezo vibration platform for probe dynamic performance calibration[J].Measurement Science And Technology,Meas.Sci.Technol.12(2001)1509–1514).The device calibration row Journey is small, can not realize and big stroke, high-precision displacement transducer are calibrated.
The content of the invention
For above-mentioned the shortcomings of the prior art, propose that a kind of inductance of current vortex sensor linearity compensation passes Sensor calibration method and device, to solve the contradiction between existing calibrating device for displacement sensor stroke and precision, Realize the dynamic static calibration of big stroke, high-precision inductance displacement sensor.
The object of the present invention is achieved like this:
A kind of the inductance sensor calibration method and device of the compensation of current vortex sensor linearity, this method and dress The linearity of inductance displacement sensor can be calibrated by putting;Its feature mainly includes being calibrated displacement transducer, position Transmission mechanism and displacement datum instrument three parts are moved, the displacement transducer that is calibrated is inductance displacement sensor, Inductance displacement sensor is gripped using sensor holders arm, adjusts the position of inductance displacement sensor, Ensure that optical axis where the chaining pin axis of movement of inductance displacement sensor and the measuring beam of two-frequency laser interferometer is total to Line, sensor support base are arranged on base station, and sensor holders arm is fixed on the side of sensor support base;It is described Displacement transmission mechanism is made up of grand dynamic locating platform with micro-positioning platform, grand dynamic locating platform by spherical guide, Direct current generator, ball-screw, grating scale supporting plate, linear grating ruler reading head, linear grating chi composition, Grand dynamic locating platform is arranged on base station, ensures grand dynamic Positioning platform movement axis and two-frequency laser interferometer Measuring beam is parallel, and direct current generator installing plate is arranged on base station, and DC motor stator is fixed on direct current generator On installing plate, bearing be arranged on base station on, the ball-screw is made up of screw rod and nut, screw rod one end with DC motor rotor is connected, and the other end is fixed on bearing, and the spherical guide sliding block of nut and spherical guide is consolidated Even, for the spherical guide floor installation of spherical guide on base station, linear grating chi is attached to the ball of spherical guide Guide rail slide block lateral surface, ensure that linear grating chi is parallel with the axis of movement of spherical guide, grating scale supporting plate On base station, linear grating ruler reading head is arranged in grating scale supporting plate, and positioned at spherical guide The outside of spherical guide sliding block, ensure that linear grating ruler reading head is contour and parallel with linear grating chi, fine motion Locating platform is by air-float guide rail, voice coil motor, micropositioner pinboard, pick up calibration plate and measurement speculum Composition, micro-positioning platform are arranged on grand dynamic locating platform, ensure the axis of movement of micro-positioning platform with The measuring beam of two-frequency laser interferometer is parallel, and micropositioner pinboard is arranged on air-float guide rail, and and air supporting The air-float guide rail sliding block of guide rail is connected, and measurement speculum is located on the optical path of two-frequency laser interferometer, and On micropositioner pinboard, pick up calibration plate is arranged on the other end on micropositioner pinboard, ensures It is grand dynamic on the optical axis where measuring beam of the alignment groove in two-frequency laser interferometer on pick up calibration plate Guide rail pinboard is arranged on the spherical guide sliding block of spherical guide, and the voice coil motor is arranged on grand dynamic guide rail On pinboard, the air-float guide rail sliding block of voice coil motor mover installing plate and air-float guide rail is connected, voice coil motor Voice coil motor mover is arranged on voice coil motor mover installing plate, and voice coil motor stator installing plate is arranged on grand dynamic On guide rail pinboard, the voice coil motor stator of voice coil motor is arranged on voice coil motor stator installing plate, described The air-float guide rail floor installation of air-float guide rail is on grand dynamic guide rail pinboard;Command displacement transmission mechanism is returned Zero motion, it is returned to the initial zero of calibrating installation;Command displacement transmission mechanism carries out pressure table motion, makes It moves to inductance displacement sensor calibration starting point;The displacement datum instrument uses two-frequency laser interferometer, The measuring beam of two-frequency laser interferometer can provide the displacement datum of whole device, and interferometer bearing is packed in On base station, two-frequency laser interferometer is packed on interferometer bearing, and current vortex sensor is used for measuring displacement biography Caused deflection angle and the angle of pitch during mechanism kinematic are passed, the current vortex sensor is distributed arrangement two-by-two In the spherical guide sliding block both sides of spherical guide, wherein current vortex sensor one is installed with current vortex sensor two On base station, ensure two current vortex sensors probe it is contour, and with the spherical guide sliding block side of spherical guide Face is parallel, and the spherical guide sliding block that current vortex sensor three is fixed on spherical guide with current vortex sensor four is another On one side, ensure contour and parallel with tested metallic plate, the tested gold of two current vortex sensors probe Category plate is fixed on base station;Command displacement transmission mechanism carries out calibration campaign, is calibrated in inductance displacement sensor In stroke, 10 points are chosen at equal intervals, when displacement transmission mechanism, which moves to, chooses measurement point, synchronous acquisition Two-frequency laser interferometer displacement measurement s1', current vortex sensor one measure shift value s2', current vortex sensor Two measure shift value s3', current vortex sensor three measure shift value s4', current vortex sensor four measure shift value s5' and inductance displacement sensor shift value s;Shift value s is measured using current vortex sensor one2', current vortex sensing Device two measures shift value s3', current vortex sensor three measure shift value s4', current vortex sensor four measure displacement Value s5' to two-frequency laser interferometer displacement measurement s1' compensate, obtain position after two-frequency laser interferometer compensation Shift measurement value s';The data collected progress linear fit is obtained into function yi=k × si+ b, wherein, i=1,2 ..., 10, yiFor inductance displacement sensor displacement measurement after fitting, k is fitting coefficient, and b is to be fitted intercept, si For inductance displacement sensor displacement measurement before fitting, then maximum nonlinearity erron max in stroke is calibrated | yi-si'| Ratio with gamut is the linearity, wherein, i=1,2 ..., 10, si' to calibrate, stroke is interior to choose measurement point Locate displacement measurement after two-frequency laser interferometer compensates.
Compared with prior art, it is characteristic of the invention that:
The present invention uses the structure of macro-micro dual-drive, and provides displacement datum with two-frequency laser interferometer, While improving calibrating installation calibration stroke, moreover it is possible to ensure that calibrating installation has higher precision.Double-frequency laser Interferometer can monitor posture of the calibrating installation in motion process in real time, utilize electric vortex sensor measuring position Deflection and the angle of pitch of the transmission mechanism in motion process are moved, monitors calibrating installation in real time in motion process Posture, line position of going forward side by side move compensation deals, are deflected and pitching band so as to eliminate calibrating installation in motion process The error come, ensure that calibrating installation calibration accuracy.
Brief description of the drawings:
Fig. 1 is inductance displacement sensor calibrating installation structural representation
Fig. 2 is inductance displacement sensor structural representation
Fig. 3 is pick up calibration plate structure schematic diagram
Fig. 4 is two-frequency laser interferometer structural representation
Fig. 5 is current vortex sensor position arrangement schematic diagram
Fig. 6 is eddy current sensor displacement compensation principle schematic diagram
Fig. 7 is grand dynamic location platform arrangement schematic diagram
Fig. 8 is micro-positioning platform structural representation
Piece number in figure:1-sensor support base, 2-sensor holders arm, 3-inductance displacement sensor, 3a- Chaining pin, 4-pick up calibration plate, 4a-alignment groove, 5-micropositioner pinboard, 6-air-float guide rail, 6a- Air-float guide rail base, 6b-air-float guide rail sliding block, 7-measurement speculum, 8-voice coil motor, 8a-voice coil loudspeaker voice coil Connecting plate for electric motor, 8b-voice coil motor mover, 8c-voice coil motor stator, 8d-voice coil motor installing plate, 9 - two-frequency laser interferometer, 9a-measuring beam, 10-interferometer bearing, 11-base station, 12-spherical guide, 12a-spherical guide sliding block, 12b-spherical guide base, 13-grand dynamic guide rail pinboard, 14-grating scale Supporting plate, 15-linear grating ruler reading head, 16-linear grating chi, 17-current vortex sensor, 17a- Current vortex sensor one, 17b-current vortex sensor two, 17c-current vortex sensor three, 17d-current vortex Sensor four, 17e-tested metallic plate, 18-ball-screw, 18a-screw rod, 18b-nut, 19-straight Flow motor, 19a-direct current generator installing plate, 19b-DC motor stator, 19c-bearing.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings:
The inductance sensor calibration method and device of a kind of current vortex sensor linearity compensation, methods described with Device is:Whole device is broadly divided into displacement datum instrument, displacement transmission mechanism and is calibrated displacement transducer Three parts.Whole device is placed on vibration-isolating platform, is placed under isoperibol.It is described to be calibrated displacement biography Sensor uses inductance displacement sensor 3, and inductance displacement sensor 3 using sensor holders arm 2 clamp admittedly It is fixed, the position of inductance displacement sensor 3 is adjusted, ensures the chaining pin 3a axis of movements of inductance displacement sensor 3 Conllinear with optical axis where the measuring beam 9a of two-frequency laser interferometer 9, sensor support base 1 is arranged on base station 11 On, sensor holders arm 2 is fixed on the side of sensor support base 1.The displacement transmission mechanism is using grand micro- Two-stage drive mode, it is made up of grand dynamic locating platform with micro-positioning platform, grand dynamic locating platform provides big row Journey coarse positioning, by spherical guide 12, direct current generator 19, ball-screw 18, grating scale supporting plate 14, directly Line grating ruler reading head 15, linear grating chi 16 are formed, and grand dynamic locating platform is arranged on base station 11, are protected It is parallel with the measuring beam 9a of two-frequency laser interferometer 9 to demonstrate,prove grand dynamic Positioning platform movement axis, direct current generator peace Loading board 19a is arranged on base station 11, and DC motor stator 19b is fixed on direct current generator installing plate 19a, Bearing 19c is arranged on base station 11, and the ball-screw 18 is made up of screw rod 18a and nut 18b, ball The screw rod 18a one end of leading screw 18 is connected with DC motor rotor, and the other end is fixed on bearing 19c, ball wire The nut 18b of thick stick 18 and spherical guide 12 spherical guide sliding block 12a are connected, and the ball of spherical guide 12 is led Flange of rail seat 12b is arranged on base station 11, and linear grating chi 16 is attached to the spherical guide sliding block of spherical guide 12 12a lateral surfaces, ensure that linear grating chi 16 is parallel with the axis of movement of spherical guide 12, grating scale supporting plate 14 are arranged on base station 11, and linear grating ruler reading head 15 is arranged in grating scale supporting plate 14, and is located at The spherical guide sliding block 12a of spherical guide 12 outside, ensure linear grating ruler reading head 15 and line light Grid chi 16 is contour and parallel.Micro-positioning platform provides small stroke fine positioning, by air-float guide rail 6, voice coil loudspeaker voice coil electricity Machine 8, micropositioner pinboard 5, pick up calibration plate 4 and measurement speculum 7 form, micro-positioning platform peace On grand dynamic locating platform, ensure the axis of movement of micro-positioning platform and the survey of two-frequency laser interferometer 9 It is parallel to measure light beam 9a, micropositioner pinboard 5 is arranged on air-float guide rail 6, and with the air supporting of air-float guide rail 6 Guide rail slide block 6b is connected, and measurement speculum 7 is located on the optical path of two-frequency laser interferometer 9, and installs On micropositioner pinboard 5, pick up calibration plate 4 is arranged on the other end on micropositioner pinboard 5, protects Demonstrate,prove the light where measuring beam 9a of the alignment groove 4a on pick up calibration plate 4 in two-frequency laser interferometer 9 On axle, grand dynamic guide rail pinboard 13 is arranged on the spherical guide sliding block 12a of spherical guide 12, the sound Enclose motor 8 to be arranged on grand dynamic guide rail pinboard 13, voice coil motor mover installing plate 8a and air-float guide rail 6 Air-float guide rail sliding block 6b be connected, the voice coil motor mover 8b of voice coil motor 8 is arranged on voice coil motor mover On installing plate 8a, voice coil motor stator installing plate 8d is arranged on grand dynamic guide rail pinboard 18, voice coil motor 8 voice coil motor stator 8c is arranged on voice coil motor stator installing plate 8d, the air supporting of the air-float guide rail 6 Guiderail base 6a is arranged on grand dynamic guide rail pinboard 13.Command displacement transmission mechanism carries out back to zero motion, Displacement transmission mechanism finds the zero-bit of grand dynamic locating platform, and as initial zero, micro-positioning platform moves to At its half range, as initial zero.Command displacement transmission mechanism carries out pressure table motion, grand dynamic locating platform From initial zero, high speed and uniform motion before table is pressed, after telogenesis work(is pressed, grand dynamic locating platform Low speed uniform motion, move to inductance displacement sensor 3 and calibrate stroke starting point.The displacement datum instrument Using two-frequency laser interferometer 9, the measuring beam 9a of two-frequency laser interferometer 9 can provide whole device Displacement datum, interferometer bearing 10 are packed on base station 11, and two-frequency laser interferometer 9 is packed in interferometer On bearing 10, ensure that the measuring beam 9a of two-frequency laser interferometer 9 is put down with displacement transmission mechanism axis of movement OK.Current vortex sensor 17 is used for measuring caused deflection angle and pitching in displacement transmission mechanism motion process Angle, the current vortex sensor 17 are arranged in the spherical guide sliding block 12a two of spherical guide 12 two-by-two Side, the wherein 17a of current vortex sensor one are arranged on base station 11 with the 17b of current vortex sensor two, ensure two The probe of current vortex sensor is contour, and parallel with the spherical guide sliding block 12a sides of spherical guide 12, electricity The 17c of the eddy current sensor three and 17d of current vortex sensor four is fixed on the spherical guide sliding block 12a of spherical guide 12 On another side, ensure that two current vortex sensors probe is contour and parallel with tested metallic plate 17e, it is described Tested metallic plate 17e is fixed on base station 11.Command displacement transmission mechanism carries out calibration campaign, in inductance position Displacement sensor 3 is calibrated in stroke, chooses ten points at equal intervals, when displacement transmission mechanism moves to selection measurement During point, the displacement measurement s of synchronous acquisition two-frequency laser interferometer 91', the 14a of current vortex sensor one position Shift measurement value s2', the 14b of current vortex sensor two displacement measurement s3', the 14c of current vortex sensor three position Shift measurement value s4', the 14d of current vortex sensor four displacement measurement s5' with the displacement of inductance displacement sensor 3 Value s.According to the 17a of current vortex sensor one displacement measurement s2' surveyed with the 17b of current vortex sensor two displacement Value s3' understand, if displacement transmission mechanism deflects in motion process around central point O, by known electric whirlpool The distance between the 17a of flow sensor one and the 17b of current vortex sensor two D, we can calculate its deflection angleAnd then the offset deviation e on the caused measuring beam 9a of deflection can be calculated, carry out Compensation obtains s'.The data collected progress linear fit is obtained into function yi=k × si+ b, wherein, i=1,2 ..., 10, yiFor the displacement measurement of inductance displacement sensor after fitting 3, k is fitting coefficient, and b is fitting intercept, siFor the displacement measurement of inductance displacement sensor before fitting 3, then maximum nonlinearity erron max in stroke is calibrated | yi- si' | the ratio with gamut is the linearity, wherein, i=1,2 ..., 10, si' measured to be chosen in calibration stroke Displacement measurement after two-frequency laser interferometer 9 compensates at point.

Claims (1)

1.一种电涡流传感器直线度补偿的电感传感器校准方法与装置,其特征在于:该校准装置主要包括被校准位移传感器、位移传递机构和位移基准仪器三部分,所述被校准位移传感器为电感位移传感器(3),电感位移传感器(3)采用传感器夹持臂(2)进行夹持固定,调整电感位移传感器(3)的位置,保证电感位移传感器(3)的测针(3a)运动轴线与双频激光干涉仪(9)的测量光束(9a)所在光轴共线,传感器支座(1)安装在基台(11)上,传感器夹持臂(2)固定在传感器支座(1)的侧面;所述位移传递机构由宏动定位平台与微动定位平台组成,宏动定位平台由滚珠导轨(12)、直流电机(19)、滚珠丝杠(18)、光栅尺支撑板(14),直线光栅尺读数头(15),直线光栅尺(16)组成,宏动定位平台安装在基台(11)上,保证宏动定位平台运动方向与双频激光干涉仪(9)的测量光束(9a)平行,直流电机安装板(19a)安装在基台(11)上,直流电机定子(19b)固定在直流电机安装板(19a)上,轴承(19c)安装在基台(11)上,所述滚珠丝杠(18)由螺杆(18a)和螺母(18b)组成,螺杆(18a)一端与直流电机转子固连,另一端固定在轴承(19c)上,螺母(18b)与滚珠导轨(12)的滚珠导轨滑块(12a)固连,滚珠导轨(12)的滚珠导轨底座(12b)安装在基台(11)上,直线光栅尺(16)贴在滚珠导轨(12)的滚珠导轨滑块(12a)外侧面,保证直线光栅尺(16)与滚珠导轨(12)的运动方向平行,光栅尺支撑板(14)安装在基台(11)上,直线光栅尺读数头(15)安装在光栅尺支撑板(14)上,并位于滚珠导轨(12)的滚珠导轨滑块(12a)的外侧,保证直线光栅尺读数头(15)与直线光栅尺(16)等高且平行,微动定位平台由气浮导轨(6)、音圈电机(8)、微动台转接板(5)、传感器校准板(4)和测量反射镜(7)组成,微动定位平台安装在宏动定位平台上,保证微动定位平台的运动方向与双频激光干涉仪(9)的测量光束(9a)平行,微动台转接板(5)安装在气浮导轨(6)上,并与气浮导轨(6)的气浮导轨滑块(6b)固连,测量反射镜(7)位于双频激光干涉仪(9)的测量光路上,且安装在微动台转接板(5)上,传感器校准板(4)安装在微动台转接板(5)上的另一端,保证传感器校准板(4)上的对准刻线(4a)在双频激光干涉仪(9)的测量光束(9a)所在的光轴上,宏动导轨转接板(13)安装在滚珠导轨(12)的滚珠导轨滑块(12a)上,所述音圈电机(8)安装在宏动导轨转接板(13)上,音圈电机动子安装板(8a)与气浮导轨(6)的气浮导轨滑块(6b)固连,音圈电机(8)的音圈电机动子(8b)安装在音圈电机动子安装板(8a)上,音圈电机定子安装板(8d)安装在宏动导轨转接板(18)上,音圈电机(8)的音圈电机定子(8c)安装在音圈电机定子安装板(8d)上,所述气浮导轨(6)的气浮导轨底座(6a)安装在宏动导轨转接板(13)上;控制位移传递机构进行回零运动,使其回到校准装置的初始零点;控制位移传递机构进行压表运动,使其运动到电感位移传感器(3)校准起始点;所述位移基准仪器采用双频激光干涉仪(9),双频激光干涉仪(9)的测量光束(9a)可以提供整个装置的位移基准,干涉仪支座(10)固装在基台(11)上,双频激光干涉仪(9)固装在干涉仪支座(10)上,电涡流传感器(17)用来测量位移传递机构运动过程中所产生的偏转角和俯仰角,所述电涡流传感器(17)两两分布布置在滚珠导轨(12)的滚珠导轨滑块(12a)两侧,其中电涡流传感器一(17a)与电涡流传感器二(17b)安装在基台(11)上,保证两电涡流传感器的探头等高,且与滚珠导轨(12)的滚珠导轨滑块(12a)侧面平行,电涡流传感器三(17c)与电涡流传感器四(17d)固定在滚珠导轨(12)的滚珠导轨滑块(12a)另一侧面上,保证两电涡流传感器探头等高,且与被测金属板(17e)平行,所述被测金属板(17e)固定在基台(11)上;控制位移传递机构进行校准运动,在电感位移传感器(3)校准行程内,等间隔选取10个点,当位移传递机构运动到选取测量点时,同步采集双频激光干涉仪(9)位移测量值s1'、电涡流传感器一(17a)测得位移值s2'、电涡流传感器二(17b)测得位移值s3'、电涡流传感器三(17c)测得位移值s4'、电涡流传感器四(17d)测得位移值s5'与电感位移传感器(3)位移值s;利用电涡流传感器一(17a)测得位移值s2'、电涡流传感器二(17b)测得位移值s3'、电涡流传感器三(17c)测得位移值s4'、电涡流传感器四(17d)测得位移值s5'对双频激光干涉仪(9)位移测量值s1'进行补偿,得到双频激光干涉仪(9)补偿后位移测量值s';将采集到的数据进行线性拟合得到函数yi=k×si+b,其中,i=1,2,…,10,yi为拟合后电感位移传感器(3)位移测量值,k为拟合系数,b为拟合截距,si为拟合前电感位移传感器(3)位移测量值,则校准行程内最大非线性误差max|yi-si'|与全量程的比值为线性度,其中,i=1,2,…,10,si'为校准行程内选取测量点处双频激光干涉仪(9)补偿后位移测量值。1. An inductance sensor calibration method and device for eddy current sensor straightness compensation, characterized in that: the calibration device mainly includes three parts of a calibrated displacement sensor, a displacement transmission mechanism and a displacement reference instrument, and the calibrated displacement sensor is an inductance The displacement sensor (3), the inductive displacement sensor (3) is clamped and fixed by the sensor clamping arm (2), and the position of the inductive displacement sensor (3) is adjusted to ensure the movement axis of the stylus (3a) of the inductive displacement sensor (3) It is collinear with the optical axis of the measurement beam (9a) of the dual-frequency laser interferometer (9), the sensor support (1) is installed on the base (11), and the sensor clamping arm (2) is fixed on the sensor support (1 ) side; the displacement transmission mechanism is made up of a macro-motion positioning platform and a micro-motion positioning platform, and the macro-motion positioning platform is composed of a ball guide rail (12), a DC motor (19), a ball screw (18), a grating ruler support plate ( 14), composed of a linear grating ruler reading head (15) and a linear grating ruler (16), the macro-motion positioning platform is installed on the abutment (11), so as to ensure the movement direction of the macro-motion positioning platform and the dual-frequency laser interferometer (9) The measuring beam (9a) is parallel, the DC motor mounting plate (19a) is installed on the base (11), the DC motor stator (19b) is fixed on the DC motor mounting plate (19a), and the bearing (19c) is installed on the base (11 ), the ball screw (18) is composed of a screw (18a) and a nut (18b), one end of the screw (18a) is fixedly connected with the DC motor rotor, the other end is fixed on the bearing (19c), and the nut (18b) is connected with the The ball guide slider (12a) of the ball guide (12) is fixedly connected, the ball guide base (12b) of the ball guide (12) is installed on the base (11), and the linear grating scale (16) is attached to the ball guide (12) The outer surface of the ball guide slider (12a) ensures that the linear grating scale (16) is parallel to the moving direction of the ball guide rail (12), the grating scale support plate (14) is installed on the base (11), and the linear grating scale reading head (15) Installed on the grating scale support plate (14), and located outside the ball guide rail slider (12a) of the ball guide rail (12), to ensure that the linear grating scale reading head (15) is at the same height as the linear grating scale (16) And parallel, the micro-motion positioning platform is composed of air bearing guide rail (6), voice coil motor (8), micro-motion table adapter plate (5), sensor calibration plate (4) and measuring mirror (7), the micro-motion positioning The platform is installed on the macro-motion positioning platform to ensure that the movement direction of the micro-motion positioning platform is parallel to the measuring beam (9a) of the dual-frequency laser interferometer (9), and the micro-motion stage adapter plate (5) is installed on the air bearing guide rail (6 ), and is fixedly connected with the air-floating rail slider (6b) of the air-floating rail (6), the measuring mirror (7) is located on the measuring optical path of the dual-frequency laser interferometer (9), and is installed on the micro-motion stage On the adapter plate (5), the sensor calibration plate (4) is installed on the other end of the micro-motion stage adapter plate (5), ensuring that the alignment reticle (4a) on the sensor calibration plate (4) is Measuring beam (9a) of instrument (9) On the optical axis of the macro motion guide rail adapter plate (13) is installed on the ball guide rail slider (12a) of the ball guide rail (12), and the voice coil motor (8) is installed on the macro motion guide rail adapter plate (13 ), the voice coil motor mover mounting plate (8a) is fixedly connected with the air bearing guide rail slider (6b) of the air bearing guide rail (6), and the voice coil motor mover (8b) of the voice coil motor (8) is installed on the The coil motor mover mounting plate (8a), the voice coil motor stator mounting plate (8d) is installed on the macro motion guide rail adapter plate (18), the voice coil motor stator (8c) of the voice coil motor (8) is installed on the On the stator mounting plate (8d) of the ring motor, the air-floating guide rail base (6a) of the air-floating guide rail (6) is installed on the macro-motion guide rail adapter plate (13); the displacement transmission mechanism is controlled to return to zero, so that it Get back to the initial zero point of the calibration device; control the displacement transfer mechanism to move the pressure gauge so that it moves to the calibration starting point of the inductive displacement sensor (3); the displacement reference instrument adopts a dual-frequency laser interferometer (9), and the dual-frequency laser interferometer The measuring beam (9a) of the instrument (9) can provide the displacement reference of the whole device, the interferometer support (10) is fixed on the base (11), and the dual-frequency laser interferometer (9) is fixed on the interferometer support (10), the eddy current sensors (17) are used to measure the deflection angle and the pitch angle generated during the movement of the displacement transmission mechanism, and the eddy current sensors (17) are distributed in pairs on the ball guide rail of the ball guide rail (12) On both sides of the slider (12a), the first eddy current sensor (17a) and the second eddy current sensor (17b) are installed on the base (11) to ensure that the probes of the two eddy current sensors are at the same height, and are aligned with the ball guide rail (12) The side of the ball guide slider (12a) is parallel, and the eddy current sensor three (17c) and the eddy current sensor four (17d) are fixed on the other side of the ball guide slider (12a) of the ball guide (12), ensuring that the two eddy current The sensor probe is at the same height and parallel to the measured metal plate (17e), and the measured metal plate (17e) is fixed on the abutment (11); the displacement transmission mechanism is controlled to perform a calibration movement, and the inductive displacement sensor (3) is calibrated During the stroke, select 10 points at equal intervals. When the displacement transfer mechanism moves to the selected measurement point, the displacement measurement value s 1 ' of the dual-frequency laser interferometer (9) and the displacement value s measured by the eddy current sensor one (17a) are collected synchronously. 2 ', displacement value s 3 ' measured by eddy current sensor 2 (17b), displacement value s 4 ' measured by eddy current sensor 3 (17c), displacement value s 5 ' measured by eddy current sensor 4 (17d), and inductance displacement Sensor (3) displacement value s; use eddy current sensor 1 (17a) to measure displacement value s 2 ', eddy current sensor 2 (17b) to measure displacement value s 3 ', eddy current sensor 3 (17c) to measure displacement value s 4 ', the displacement value s 5 ' measured by the eddy current sensor 4 (17d) compensates the displacement measurement value s 1 ' of the dual-frequency laser interferometer (9), and obtains the displacement measurement value of the dual-frequency laser interferometer (9) after compensation s'; Perform linear fitting on the collected data to obtain the function y i =k×s i +b, wherein, i=1, 2,...,10, y i is the displacement measurement value of the inductive displacement sensor (3) after fitting, k is the fitting coefficient, b is the fitting intercept, and s i is the displacement measurement value of the inductive displacement sensor (3) before fitting, then the ratio of the maximum nonlinear error max|y i -s i '| to the full scale within the calibration stroke is the linearity, wherein, i=1, 2, ..., 10, s i ' is the displacement measurement value after compensation by the dual-frequency laser interferometer (9) at the selected measurement point in the calibration stroke.
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