CN109596082A - The method of field calibration Linear displacement transducer - Google Patents
The method of field calibration Linear displacement transducer Download PDFInfo
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- CN109596082A CN109596082A CN201811318698.6A CN201811318698A CN109596082A CN 109596082 A CN109596082 A CN 109596082A CN 201811318698 A CN201811318698 A CN 201811318698A CN 109596082 A CN109596082 A CN 109596082A
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- Prior art keywords
- linear movement
- movement pick
- school
- displacement
- guiding tool
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/042—Calibration or calibration artifacts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention proposes the methods for field calibration linear movement pick-up.The field calibration method use established according to specific characteristic point specified coordinate axis with by the consistent measurement coordinate system of the motion profile of school linear movement pick-up；In the case where measuring coordinate system, default guiding tool is adjusted by laser tracker guidance, is formed by the straight-line displacement benchmark of school linear movement pick-up；It with reference to straight-line displacement benchmark, is drawn using default guiding tool and is moved by school linear movement pick-up, and calibrate linear movement pick-up using laser tracker.The embodiment of the present invention includes that method is simple, and data are accurate and reliable, versatile technical effect.
Description
Technical field
The present invention relates to pick up calibration and large scale laser measuring technique field more particularly to field calibration linear displacements
The method of sensor.
Background technique
Aircraft development needs to do a large number of experiments, and the test period is longer.A large amount of displacement of the lines sensings are installed and used on testing stand
Device, sensor need regular dismounting that measuring room is sent to calibrate.Some linear movement pick-ups due to: solidification can not dismantle in systems；With
Testing stand entity does not allow to dismantle there are positioning relation；It is connected with test bed testing system signal line and is not easy to dismantle；Test is just
It is carrying out, disassembly may cause reset inaccuracy；Live special test environment is different from metering room temperature, electromagnetic environment, causes
Resulting calibration result does not conform to the actual conditions, these aspects cause to produce field calibration demand.Field calibration needs suitable
Field calibration guiding tool conjunction measuring equipment completes work according to certain field calibration method.
Drawing for the specification of field calibration linear movement pick-up, method and field calibration is delivered without proposition both at home and abroad at present
Tool is led, is not directed in People's Republic of China (PRC) metering technology normalized JJF1305-2011 " linear movement pick-up calibrating standard " existing
Field calibration problem.Some units realize field calibration using gauge block, slide calliper rule, high accuracy sensor phase comparison method, do not make
It is significantly different with the present invention with any guiding tool.
Summary of the invention
That the technical problem to be solved by the present invention is to provide a kind of methods is simple, data are accurate and reliable, versatile, live school
The method of directrix displacement sensor.
The embodiment of the invention provides a kind of methods of field calibration linear movement pick-up.Realize that field calibration displacement of the lines passes
The method of sensor is:
According to specific characteristic point, it is consistent with by the motion profile of school linear movement pick-up (A3) to establish specified coordinate axis
Measure coordinate system；
In the case where measuring coordinate system, default guiding tool is adjusted by laser tracker (A0) guidance, is formed by school displacement of the lines
The straight-line displacement benchmark of sensor (A3)；
With reference to straight-line displacement benchmark, used by school linear movement pick-up (A3), measurement using the traction of default guiding tool
Laser mirror (A1) moves synchronously, and calibrates linear movement pick-up lubber-line displacement sensor using laser tracker (A0).
The embodiment of the present invention may have the advantage that
1. under suitable complex working condition, the linear movement pick-up of field calibration difference Installation posture；
2. linear guide has multiple degrees of freedom, linear guide is facilitated to look for by the orientation consistency of school linear movement pick-up
Just.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, it is therefore apparent that drawings described below is only some embodiments of the present invention, for this
For the technical staff in field, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the default guiding tool schematic diagram of one embodiment of the invention；
Fig. 2 is the method schematic flow chart of the field calibration linear movement pick-up of one embodiment of the invention.
Wherein:
Bracket component 10, guide assembly 20, posture adjustment component 30；
Pedestal 11, retaining mechanism 13, lifting column 14, lengthens column 15, driving lever 16, support platform 17 at elevating mechanism 12；
Linear guide 21, sliding block micro-adjusting mechanism 22, sliding block 23, reflecting mirror strut 24, towing plate 25；
Pitching frame 31, locking handwheel 32, rotary shaft 33, mandril 34, ears connector 35.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is
A part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiments of the present invention, those skilled in the art
Without making creative work, every other embodiment obtained, shall fall within the protection scope of the present invention.
The feature and illustrative examples of various aspects of the invention is described more fully below.In following detailed description
In, many details are proposed, in order to provide complete understanding of the present invention.But come for those skilled in the art
It says it will be apparent that the present invention can be implemented in the case where not needing some details in these details.Below to reality
The description of example is applied just for the sake of providing and better understanding to of the invention by showing example of the invention.The present invention is never
It is limited to any specific setting and method set forth below, but covering finishes under the premise of without departing from the spirit of the present invention
Structure, method, any improvement of device, substitutions and modifications.In the the accompanying drawings and the following description, well known structure and skill is not shown
Art is unnecessary fuzzy to avoid causing to the present invention.
It should be noted that in the absence of conflict, the feature in the embodiment of the present invention and embodiment can be tied mutually
It closes, each embodiment mutually can be referred to and be quoted.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Fig. 1 is the default guiding tool schematic diagram of one embodiment of the invention.
As shown in Figure 1, the guiding tool of field calibration linear movement pick-up comprising: bracket component 10, guide assembly
20, posture adjustment component three parts.
Bracket component 10 include: pedestal 11, elevating mechanism 12, retaining mechanism 13, lifting column 14, lengthen column 15, driving lever 16,
Support platform 17.
Guide assembly 20 includes: linear guide 21, sliding block micro-adjusting mechanism 22, sliding block 23, reflecting mirror strut 24, towing plate
25。
Pose_adjuster 30 includes: pitching frame 31, locking handwheel 32, rotary shaft 33, mandril 34, ears connector 35.
Remaining includes: that A0 is laser tracker, and A1 is laser mirror, and A2 is by school linear movement pick-up.
Its structure feature is that guide assembly 20 is mounted on bracket component 10 by posture adjustment component 30；By adjusting branch
The displacement of the lines and angular displacement of frame component 10, and spatial attitude posture adjustment component 30 nutation posture and/or faced upward is adjusted, so that leading
Rail assembly 20 becomes the straight-line displacement benchmark of linear movement pick-up.Guide assembly 20 can be used independently.
Bracket component 10 include: pedestal 11, elevating mechanism 12, retaining mechanism 13, lifting column 14, lengthen column 15, driving lever 16,
Support platform 17, in which: the cylinder internal messing of pedestal 11 is equipped with lifting column 14, is equipped with elevating mechanism on the cylinder of pedestal 11
12 and retaining mechanism 13, be threadedly coupled above lifting column 14 it is coaxial lengthen column 15, lengthen there are two being connected through a screw thread on column 15
Driving lever 16 lengthens 15 top of column and a support platform 17 is fixedly mounted.
Guide assembly 20 includes: linear guide 21, sliding block micro-adjusting mechanism 22, sliding block 23 and towing plate 25, in which: straight line is led
Sliding block 23 is installed, 23 upper surface of sliding block is equipped with towing plate 25 on rail 21；Linear guide 21 and sliding block 23 are precise motion pair,
The symmetrical structure in 21 cross section of linear guide.
Pose_adjuster 30 includes: pitching frame 31, locking handwheel 32, rotary shaft 33, mandril 34, ears connector 35；Pitching frame
32 take hole axle transition fit to connect by rotary shaft 33 with the through-hole in support platform 17, and pitching frame 31 locks hand by a pair of
32 guiding of wheel and fastening；Ears connector 35 is installed on the lower mounting plane of linear guide 21, the notch direction of ears connector 35
Consistent with the notch direction of pitching frame 31,34 lower part of mandril is connect with support platform 17 by being threadedly engaged, and 34 top of mandril is logical
It crosses bolt and ears connector 35 is flexibly connected.
The reflecting mirror strut 24 of laser measurement reflecting mirror A1 is installed, cunning is fixed on by the threaded hole on towing plate 25
On block 23；When the axial force distribution along linear guide 21 is in sliding block 23, sliding block 23 passes through towing plate 25, drive corrected sensor A2
Tache motorice back and forth movement, while the reflecting mirror A1 that sliding block 23 is able to drive on reflecting mirror strut 24 is moved synchronously.
Fig. 2 is the method schematic flow chart of the field calibration linear movement pick-up of one embodiment of the invention.
As shown in Fig. 2, in some embodiments, in step S10: by measurement, obtaining for by school linear movement pick-up
The characteristic point of A3 reference for installation establishes specified coordinate axis and by school according to the characteristic point specified on the linear movement pick-up A3 of school
The consistent measurement coordinate system of the motion profile of linear movement pick-up A3.
In some embodiments, in step S20: in the case where measuring coordinate system, and guiding tune by laser tracker A0 measurement
Whole bracket component 10 and adjust posture adjustment component 30 translation, rotation, go up and down, bow and face upward spatial attitude so that guide assembly 20 at
For the straight-line displacement benchmark of linear movement pick-up.
In some embodiments, in step S30: referring to straight-line displacement benchmark, drawn using default guiding tool by school line
Laser mirror A1 used in displacement sensor A3, measurement is moved synchronously, and utilizes laser tracker A0 lubber-line displacement sensing
Device.
In some embodiments, in step S40: including: in the way of laser tracker A0 calibration linear movement pick-up
The tache motorice of linear movement pick-up is driven by presetting guiding tool, so that generating displacement by school linear movement pick-up A3；It utilizes
Laser tracker A0 measures input displacement amount, obtains by the correspondence output quantity of school linear movement pick-up A3.
In some embodiments, in step S50: according to input quantity and output quantity, being calculated using least square method by school line
The sensitivity and the linearity of displacement sensor A3；According to input quantity and output quantity, obtain being sensed by school displacement of the lines by graphing method
Input and output quantity maximum difference, calculate hysterisis error by maximum difference at the same calibration point of the positive revesal of device A3；According to input
Amount and output quantity, it is maximum poor by output quantity at the same calibration point of school linear movement pick-up A3 stroke in the same direction to be obtained by graphing method
Value, calculates hysterisis error by maximum difference.
Therefore, the guiding tool according to an embodiment of the present invention for linear movement pick-up field calibration, by actually making
With verifying, meet requirement.The calibration result and higher level's measurement technology machine that the method for field calibration linear movement pick-up obtains
The calibration result that structure is provided compares, and the calibration data of this method is accurate and reliable as the result is shown, has achieved the purpose that solve the problems, such as.
Most preferred embodiment: the sensor used on certain aircraft iron bird testing stand needs field calibration, sensor distance ground 2
Rice is installed with ground in about 30 ° of tilt angles, corrected sensor measurement range (0~1000) mm at wing pressurized strut.
Guide assembly 20 is mounted on bracket component 10 by posture adjustment component 30.Become field calibration displacement of the lines biography
The guiding tool of sensor is whole.Selection laser tracker A0 does measuring device, by measurement, obtains for being sensed by school displacement of the lines
The characteristic point of device A3 reference for installation establishes specified coordinate axis and quilt according to the characteristic point specified on the linear movement pick-up A3 of school
The consistent measurement coordinate system of the motion profile of school linear movement pick-up A3；In the case where measuring coordinate system, pass through laser tracker A0
Measurement and guides adjustment bracket component 10 and adjusts the translation of posture adjustment component 30, rotation, goes up and down, bows and face upward spatial attitude, so that
Guide assembly 20 becomes the straight-line displacement benchmark of linear movement pick-up；By the guidance work for field calibration linear movement pick-up
Linear guide 21 on tool does straight-line displacement benchmark, using sliding block 23, sync pulling laser mirror A1 and is passed by school displacement of the lines
The tache motorice measuring staff of sensor A2 completes standard volume with a fixed step size or any step-length and measured point-to-point measurement data acquires,
Input displacement amount and output signal amount are obtained, by data processing, the field calibration of linear movement pick-up A2 is completed, realizes scene
The step of calibration, is as follows:
1. under laser tracker initial coordinate system, by measuring by the spy on the Linear displacement transducer A2 reference for installation of school
Levy point, establish given axis with by the consistent measurement coordinate system of the motion profile of school linear movement pick-up A2, measurement coordinate system
It is to provide intuitive criterion displacement for calibration and establish；
2. by laser tracker measurement and guide five freedom degrees of the guiding tool adjustment complete linear guide 21 with
By the accurate centering of school linear movement pick-up A2 axial location；
3. by being connect by the tache motorice of school linear movement pick-up A2 with towing plate 25；The laser mirror A1 that will be used to measure
It is fixed on sliding block 23；
4. the driving drive of sliding block 23 reflecting mirror A1 moves to the measurement lower limit starting point of calibration range, to be sensed by school displacement of the lines
The step-length of device A2 range substantially 10% calibrates to the measurement upper limit point by point, and record is calibrated 2 output quantity of sensors A, sliding block freqency fine adjustment machine
Structure 22 is back to measurement lower limit with former calibration point, records backhaul calibration point output quantity.Positive stroke and revesal are calibrated back and forth point by point
Primary to recycle for one, calibration is carried out continuously 3 circulations.Establish the corresponding relationship between input displacement amount and output quantity.Using
Least square method be calculated sensitivity be 0.004601V/mm, the linearity 0.065%.
5. being obtained using graphing method by the same calibration of the positive revesal of school linear movement pick-up A3 according to input quantity and output quantity
Output quantity maximum difference at point calculates hysterisis error by maximum difference, and hysterisis error calibration result is 0.062%FS.
6. being obtained using graphing method by the same calibration of school linear movement pick-up A3 stroke in the same direction according to input quantity and output quantity
Output quantity maximum difference at point calculates hysterisis error by maximum difference, and repeated calibration result is 0.082%FS.
By comparing analysis with higher level's measurement technology mechanism calibration data, field calibration linear movement pick-up as the result is shown
Method is feasible.
It should be noted that above-mentioned flow operations can carry out different degrees of combined application, for simplicity, repeating no more
The sequence of above-mentioned operating procedure can be carried out spirit according to actual needs by various combined implementations, those skilled in the art
Adjustment living, or above-mentioned steps are subjected to the operation such as flexible combination.
Finally it should be noted that: the above embodiments are merely illustrative of the technical solutions of the present invention, but protection of the invention
Range is not limited thereto, and anyone skilled in the art in the technical scope disclosed by the present invention, can be thought easily
It is modified or replaceed to various equivalent, these, which are modified or replaceed, should all be included within the scope of the present invention.
Claims (7)
1. a kind of method of field calibration Linear displacement transducer, which comprises the following steps:
According to specific characteristic point, establish specified coordinate axis with by the consistent measurement of the motion profile of school linear movement pick-up (A3)
Coordinate system；
In the case where measuring coordinate system, default guiding tool is adjusted by laser tracker (A0) guidance, formation is sensed by school displacement of the lines
The straight-line displacement benchmark of device (A3)；
With reference to straight-line displacement benchmark, the default guiding tool traction laser used by school linear movement pick-up (A3), measurement is utilized
Reflecting mirror (A1) moves synchronously, and calibrates linear movement pick-up lubber-line displacement sensor using laser tracker (A0).
2. the method according to claim 1, wherein the acquisition methods of specific characteristic point include:
By measurement, obtain for by the characteristic point of school linear movement pick-up (A3) reference for installation.
3. the method according to claim 1, wherein the default guiding tool includes:
Bracket component (10), guide assembly (20), posture adjustment component (30),
Guide assembly (20) is mounted on bracket component (10) by posture adjustment component (30)；
By adjusting the displacement of bracket component (10), and the spatial attitude of adjustment posture adjustment component (30), so that guide assembly
(20) become the straight-line displacement benchmark of linear movement pick-up.
4. the method according to claim 1, wherein the mode for adjusting default guiding tool includes:
It translates, rotate, go up and down, bow and faces upward.
5. the method according to claim 1, wherein utilizing laser tracker (A0) calibration linear movement pick-up
Mode includes:
The tache motorice of linear movement pick-up is driven by presetting guiding tool, so that generating position by school linear movement pick-up (A3)
It moves；
Input displacement amount is measured using laser tracker (A0), is obtained by the correspondence output quantity of school linear movement pick-up (A3)；
According to input quantity and output quantity, using least square method calculating by the sensitivity of school linear movement pick-up (A3) and linearly
Degree.
6. the method according to claim 1, wherein further include:
According to input quantity and output quantity, obtained by graphing method by the same calibration point of the positive revesal of school linear movement pick-up (A3)
Output quantity maximum difference calculates hysterisis error by maximum difference.
7. method according to claim 1 to 6, which is characterized in that further include:
According to input quantity and output quantity, obtained by graphing method by school linear movement pick-up (A3) the in the same direction same calibration point of stroke
Output quantity maximum difference calculates hysterisis error by maximum difference.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811318698.6A CN109596082A (en) | 2018-11-07 | 2018-11-07 | The method of field calibration Linear displacement transducer |
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| CN201811318698.6A CN109596082A (en) | 2018-11-07 | 2018-11-07 | The method of field calibration Linear displacement transducer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111121638A (en) * | 2019-12-13 | 2020-05-08 | 中国航空工业集团公司西安飞机设计研究所 | Method for calibrating displacement of material testing machine |
| CN113790690A (en) * | 2021-11-17 | 2021-12-14 | 陕西省计量科学研究院 | Clamping attitude adjusting system and method for linear displacement sensor for calibration |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111121638A (en) * | 2019-12-13 | 2020-05-08 | 中国航空工业集团公司西安飞机设计研究所 | Method for calibrating displacement of material testing machine |
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| CN113790690A (en) * | 2021-11-17 | 2021-12-14 | 陕西省计量科学研究院 | Clamping attitude adjusting system and method for linear displacement sensor for calibration |
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