CN108225667A - Pixel-level cuts quick liquid crystal scaling method and device - Google Patents
Pixel-level cuts quick liquid crystal scaling method and device Download PDFInfo
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- CN108225667A CN108225667A CN201711456584.3A CN201711456584A CN108225667A CN 108225667 A CN108225667 A CN 108225667A CN 201711456584 A CN201711456584 A CN 201711456584A CN 108225667 A CN108225667 A CN 108225667A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
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Abstract
The invention discloses a kind of Pixel-levels to cut quick liquid crystal scaling method, including：The calibration element with the shape and size all same of part to be measured is made, and processing operation is carried out to the calibration plane of calibration element；Magnitude calibration curve is obtained by carrying out magnitude proving operation to calibration element；The multiple pictures obtained according to shooting calculate form and aspect Hue value of each pixel in multiple angles, and carry out the fitting operation of Gaussian curve to form and aspect Hue values angle φ for each pixel；By the form and aspect Hue value angles of acquisitionGaussian curve in the maximum values of form and aspect Hue values be substituting in magnitude calibration curve, the τ values of acquisition are the shear stress values of each pixel；The proving operation to all pixels point in the whole plane of calibration element is completed according to the shear stress values of each pixel of acquisition.This method can effectively eliminate error, improve measurement accuracy.The invention also discloses a kind of Pixel-levels to cut quick liquid crystal caliberating device.
Description
Technical field
The present invention relates to field of measuring technique, more particularly to a kind of Pixel-level cuts quick liquid crystal scaling method and device.
Background technology
In traditional technology, in the research of the turbulent boundary layer of rotating machinery, wall surface shear stress is always extremely important
Parameter.Conventional method is such as：Particle image velocimetry method (PIV) observation trace particle follows the movement locus in flow field, obtains wall
VELOCITY DISTRIBUTION near face, and then obtain velocity gradient and calculate shear stress；Oil film interferometry is based under different shearing forces
Oil film thickness is different, and specially treated is carried out to oil film to ensure its reflection behavior of surface, other parameters in practical measurement
For example gravity, barometric gradient etc. can also influence measurement accuracy；It is generally merely able to measure single-point wall surface based on MEMS sensor technology
Shear stress, and cost is high, can not realize multimetering, there is limitation.
Invention content
Based on this, it is necessary to for traditional technology there are the problem of, a kind of picture of the multimetering with convenience is provided
Plain grade cuts quick liquid crystal scaling method and device.It is only quick to shear stress in certain temperature range this process employs certain liquid crystal
Feel this characteristic, can realize the shear stress field " planar survey " between medium and wall surface, effectively eliminate error, improve and measure essence
Degree, while there is the advantageous effect to flow disturbance very little.
In a first aspect, an embodiment of the present invention provides a kind of Pixel-levels to cut quick liquid crystal scaling method, the method includes：System
Make the calibration element with the shape and size all same of part to be measured, and processing operation is carried out to the calibration plane of the calibration element；It is logical
It crosses and magnitude proving operation acquisition magnitude calibration curve is carried out to the calibration element；It is calculated often according to multiple pictures that shooting obtains
One pixel multiple angles form and aspect Hue values, and for each described pixel to the form and aspect Hue values-angle φ
Carry out the fitting operation of Gaussian curve；By the form and aspect Hue values-angle of acquisitionThe Gaussian curve described in form and aspect
The maximum value of Hue values is substituting in the magnitude calibration curve, and the τ values of acquisition are the shear stress of each pixel
Value；The shear stress values of each pixel are completed to all pictures in the whole plane of the calibration element according to acquisition
The proving operation of vegetarian refreshments.
Processing operation is carried out to the calibration plane of the calibration element in one of the embodiments, to include：To the calibration
First plane manufactured size of the calibration plane of the part counterbore identical with shear stress measuring device；To the calibration element
Quick liquid crystal is cut in the second plane spraying of the calibration plane；Wherein, the shear stress measuring device is frictional resistance balance, described the
One plane is the calibration element plane upward there is provided the shear stress measuring device, second plane be with it is described
First plane is back to side plane.
It is described in one of the embodiments, to obtain magnitude calibration song by carrying out magnitude proving operation to the calibration element
Line includes：In a state that the air velocity that the calibration element is subject to is accelerated step by step within a preset range, in preset calibrations speed model
A Hue- τ curve is obtained by fitting operation in enclosing, and is the magnitude calibration curve by the Hue- τ curve definitions.
It further includes in one of the embodiments,：First plane of the shear stress measuring device will be provided with
Upward so that air source angle suffered by the calibration element is 0 °, and air source direction is the first plane described in uniform fold, wherein, it is described
First plane shear stress direction is identical with the air source direction.
It further includes in one of the embodiments,：Filming apparatus is separately positioned on 0 °, ± 30 ° and ± 60 ° position to carry out
Multi-angled shooting to obtain multiple pictures, wherein, with the calibration plane of calibration element described in the vertical face of the filming apparatus
Position for 0 °, and the filming apparatus is CCD camera, and the CCD camera is positioned over the calibration plane into 40 ° of angles
Surface, and fixed using fixed frame.
It further includes in one of the embodiments,：The filming apparatus in shooting process, the gas suffered by the calibration element
Temperature, calibration element institute suffered by the directional velocity of air-flow suffered by the velocity magnitude of stream, the calibration element, the calibration element
The intensity of illumination received remains unchanged, wherein, the intensity of illumination be formed as by white lamp position in it is described calibration plane just on
Side forms area source, and the area source vertical irradiation is in the calibration plane.
It further includes in one of the embodiments,：Air source pressure reducing valve is adjusted described in air source in preset calibrations velocity interval,
In the state of accelerating air velocity step by step, record is corresponding to the shear stress values under each calibration velocity amplitude of each measuring point；It is logical
Cross the shear stress values τ that linear interpolation method obtains each calibration velocity amplitude all pixels point.
It further includes in one of the embodiments,：The second plane of quick liquid crystal is cut based on spraying, air source pressure reducing valve is adjusted and exists
Described in air source in preset calibrations velocity interval, in the state of accelerating air velocity step by step, obtained by filming apparatus for each
Calibration velocity amplitude is converted to the form and aspect Hue values of the shooting each pixel of image；By the form and aspect Hue values and pass through linear interpolation
The shear stress values τ of each calibration velocity amplitude all pixels point that method obtains carries out curve fitting operation, obtains the amount
Grade calibration curve.
The thickness for cutting quick liquid crystal that is sprayed on the calibration element in one of the embodiments, on the part to be measured
The expection coating thickness for cutting quick liquid crystal is identical.
Second aspect, an embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage
Computer program is stored on medium, the computer program realizes that the Pixel-level of above-mentioned first aspect is cut when being executed by processor
Quick liquid crystal scaling method.
The third aspect, an embodiment of the present invention provides a kind of computer program product for including instruction, when the computer journey
When sequence product is run on computers so that computer performs the method described in above-mentioned first aspect.
Fourth aspect, the present invention provides a kind of Pixel-levels to cut quick liquid crystal caliberating device, including：Pretreatment operation module,
For making the calibration element with the shape and size all same of part to be measured, and processing behaviour is carried out to the calibration plane of the calibration element
Make；Magnitude calibration curve acquisition module, for obtaining magnitude calibration curve by carrying out magnitude proving operation to the calibration element；
Fitting operation module, multiple pictures for being obtained according to shooting calculate form and aspect Hue of each pixel in multiple angles
Value, and for each described pixel to the fitting operation of the form and aspect Hue values-angle φ progress Gaussian curve；Pixel
Shear stress values acquisition module, for the form and aspect Hue values-angle that will be obtainedThe Gaussian curve described in form and aspect
The maximum value of Hue values is substituting in the magnitude calibration curve, and the τ values of acquisition are the shear stress of each pixel
Value；Demarcating module is completed for the shear stress values of each pixel according to acquisition to the calibration element
The proving operation of all pixels point in whole plane.
A kind of Pixel-level provided by the invention cuts quick liquid crystal scaling method and device, makes the shape and size with part to be measured
The calibration element of all same, and processing operation is carried out to the calibration plane of calibration element；By carrying out magnitude proving operation to calibration element
Obtain magnitude calibration curve；Form and aspect Hue of each pixel in multiple angles is calculated according to multiple pictures that shooting obtains
Value, and for each pixel to the fitting operation of form and aspect Hue values-angle φ progress Gaussian curve；By the form and aspect Hue of acquisition
Value-angleGaussian curve in the maximum values of form and aspect Hue values be substituting in magnitude calibration curve, the τ values of acquisition are as each
The shear stress values of a pixel；It is completed according to the shear stress values of each pixel of acquisition in the whole plane of calibration element
The proving operation of all pixels point.This method can effectively eliminate error, improve measurement accuracy.
Description of the drawings
Fig. 1 cuts the flow diagram of quick liquid crystal scaling method for a kind of Pixel-level in one embodiment of the invention；
Fig. 2 cuts the structure diagram of quick liquid crystal caliberating device for a kind of Pixel-level in one embodiment of the invention；
Fig. 3 cuts the topology example figure of quick liquid crystal caliberating device for a kind of Pixel-level in one embodiment of the invention；And
Fig. 4 cuts the topology example figure of quick liquid crystal caliberating device for a kind of Pixel-level in another embodiment of the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right with reference to the accompanying drawings and embodiments
A kind of Pixel-level proposed by the present invention cuts quick liquid crystal scaling method and device is further elaborated.It should be appreciated that herein
Described specific embodiment only to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, the flow diagram of quick liquid crystal scaling method is cut for a kind of Pixel-level in one embodiment, specifically
Include the following steps：
Step 102, make the calibration element with the shape and size all same of part to be measured, and to the calibration plane of calibration element into
Row processing operation,.
In the present embodiment, processing operation is carried out to the calibration plane of calibration element to include：To the calibration plane of calibration element
The first plane manufactured size counterbore identical with shear stress measuring device；Second plane of the calibration plane of calibration element is sprayed
Cut quick liquid crystal；Wherein, shear stress measuring device is frictional resistance balance, and the first plane is the mark there is provided shear stress measuring device
Determine the plane of part upward, the second plane is back to side plane with the first plane.It should be noted that is sprayed on calibration element cuts
The thickness of quick liquid crystal is identical with the expection coating thickness that quick liquid crystal is cut on part to be measured.
Step 104, magnitude calibration curve is obtained by carrying out magnitude proving operation to calibration element.
In the present embodiment, included by carrying out magnitude proving operation acquisition magnitude calibration curve to calibration element：Calibration element
In a state that the air velocity being subject to is accelerated step by step within a preset range, obtained in preset calibrations velocity interval by fitting operation
A Hue- τ curve is taken, and is magnitude calibration curve by Hue- τ curve definitions.
Step 106, the multiple pictures obtained according to shooting calculate form and aspect Hue of each pixel in multiple angles
Value, and for each pixel to the fitting operation of form and aspect Hue values-angle φ progress Gaussian curve.
Step 108, by form and aspect Hue values-angle of acquisitionGaussian curve in form and aspect Hue values the maximum value amount of being substituting to
In grade calibration curve, the τ values of acquisition are the shear stress values of each pixel.
Step 110, it is completed according to the shear stress values of each pixel of acquisition to owning in the whole plane of calibration element
The proving operation of pixel.
In one embodiment, the disclosure further includes：By the first plane for being provided with shear stress measuring device upward, make
It is 0 ° to obtain air source angle suffered by calibration element, and air source direction is the first plane of uniform fold, wherein, the first plane shear stress side
To identical with air source direction.
In one embodiment, the disclosure further includes：Filming apparatus is separately positioned on 0 °, ± 30 ° and ± 60 ° of positions into
Row multi-angled shooting to obtain multiple pictures, wherein, using the position of the calibration plane of the vertical face calibration element of filming apparatus as 0 °,
And filming apparatus is CCD camera, CCD camera is positioned over the surface into 40 ° of angles with calibration plane, and is consolidated using fixed frame
It is fixed.
In one embodiment, the disclosure further includes：Filming apparatus in shooting process, the speed of the air-flow suffered by calibration element
Degree size, the directional velocity of air-flow suffered by calibration element, the temperature suffered by calibration element, the intensity of illumination suffered by calibration element are kept
It is constant, wherein, being formed as through white lamp position right over calibration plane for intensity of illumination forms area source, area source vertically shines
It penetrates in calibration plane.
In one embodiment, the disclosure further includes：Air source pressure reducing valve is adjusted in air source preset calibrations velocity interval, by
In a state that grade accelerates air velocity, record is corresponding to the shear stress values under each calibration velocity amplitude of each measuring point；Pass through
Linear interpolation method obtains the shear stress values τ of each calibration velocity amplitude all pixels point.
In one embodiment, the disclosure further includes：The second plane of quick liquid crystal is cut based on spraying, adjusts air source pressure reducing valve
In air source preset calibrations velocity interval, in the state of accelerating air velocity step by step, obtained by filming apparatus for each mark
Constant speed angle value is converted to the form and aspect Hue values of the shooting each pixel of image；By form and aspect Hue values with being obtained by linear interpolation method
The shear stress values τ of each calibration velocity amplitude all pixels point carry out curve fitting operation, acquisition magnitude calibration curve.
A kind of Pixel-level provided by the invention cuts quick liquid crystal scaling method, makes the shape and size all same with part to be measured
Calibration element, and processing operation is carried out to the calibration plane of calibration element；By carrying out magnitude proving operation amount to obtain to calibration element
Grade calibration curve；Form and aspect Hue value of each pixel in multiple angles, and needle are calculated according to multiple pictures that shooting obtains
The fitting operation of Gaussian curve is carried out to form and aspect Hue values-angle φ to each pixel；By form and aspect Hue values-angle of acquisitionGaussian curve in the maximum values of form and aspect Hue values be substituting in magnitude calibration curve, the τ values of acquisition are each pixel
Shear stress values；It is completed according to the shear stress values of each pixel of acquisition to all pixels in the whole plane of calibration element
The proving operation of point.This method can effectively eliminate error, improve measurement accuracy.Based on same inventive concept, one is additionally provided
Kind Pixel-level cuts quick liquid crystal caliberating device.Since Pixel-level cuts principle and a kind of aforementioned picture that quick liquid crystal caliberating device solves the problems, such as
Plain grade cuts that quick liquid crystal scaling method is similar, and therefore, the implementation which cuts quick liquid crystal caliberating device can be according to preceding method
The specific steps time limit, overlaps will not be repeated.
As shown in Fig. 2, the structure diagram of quick liquid crystal caliberating device is cut for a kind of Pixel-level in one embodiment.
Include specifically, Pixel-level cuts quick liquid crystal caliberating device 10：Pretreatment operation module 100 is for making and part to be measured
Shape and size all same calibration element, and processing operation is carried out to the calibration plane of calibration element；Magnitude calibration curve obtains
Module 200 is used to obtain magnitude calibration curve by carrying out magnitude proving operation to calibration element；Fitting operation module 300 is used for root
The multiple pictures obtained according to shooting calculate form and aspect Hue value of each pixel in multiple angles, and for each pixel
Point carries out form and aspect Hue values-angle φ the fitting operation of Gaussian curve；Pixel shear stress values acquisition module 400 is used for will
Form and aspect Hue values-angle of acquisitionGaussian curve in the maximum values of form and aspect Hue values be substituting in magnitude calibration curve, obtain
τ values be each pixel shear stress values；Demarcating module 500 is used for the shearing of each pixel according to acquisition
Stress value completes the proving operation to all pixels point in the whole plane of calibration element.
A kind of plain grade provided by the invention cuts quick liquid crystal caliberating device, pretreatment operation module 100 for make with it is to be measured
The calibration element of the shape and size all same of part, and processing operation is carried out to the calibration plane of calibration element；Magnitude calibration curve obtains
Modulus block 200 is used to obtain magnitude calibration curve by carrying out magnitude proving operation to calibration element；Fitting operation module 300 is used for
The multiple pictures obtained according to shooting calculate form and aspect Hue value of each pixel in multiple angles, and for each picture
Vegetarian refreshments carries out form and aspect Hue values-angle φ the fitting operation of Gaussian curve；Pixel shear stress values acquisition module 400 is used for
By form and aspect Hue values-angle of acquisitionGaussian curve in the maximum values of form and aspect Hue values be substituting in magnitude calibration curve, obtain
The τ values taken are the shear stress values of each pixel；Demarcating module 500 is cut for each pixel according to acquisition
Shearing stress value completes the proving operation to all pixels point in the whole plane of calibration element.The device can effectively eliminate error, carry
High measurement accuracy.
As shown in Figure 3-4, the topology example figure of quick liquid crystal caliberating device is cut for a kind of Pixel-level.
Specifically, the calibration element that processing is identical with experimental piece, and in the calibration one side processing dimension of plane and frictional resistance balance
Frictional resistance balance is put into measure wall surface shear stress values by identical counterbore, when calibration.The another side of calibration element plane is used for
Quick liquid crystal is cut in spraying.CCD camera is positioned over the surface into 40 ° of angles with calibration plane, and is fixed using fixed frame.White lamp position
Right over calibration plane, area source is formed, vertical irradiation is in calibration plane.Air source position is fixed, and is put down along with demarcating
The parallel direction in face is blown into air.Demarcating steps are roughly divided into the following steps：1) magnitudes are demarcated：Plane is demarcated with camera face
Position for 0 °, ensure air source blowout air-flow it is uniform and it is parallel blow over calibration plane, to ensure that camera shooting direction is true
Shear stress direction.Change air velocity, a Hue- τ curve is fitted in calibration velocity interval.2) angle calibrations：Really
During measurement, being respectively placed in 0 °, ± 30 ° and ± 60 ° position progress multi-angled shooting using 5 CCD cameras, (position description please join
Examine attached drawing), the Hue values corresponding to each pixel are calculated for each image, are fitted the height of a Hue value and angle φ
This curve, the corresponding angle of wherein Hue values maximum are the shear stress direction under the position.And Hue maximum values are updated to
In magnitude calibration curve, corresponding τ is the true shear stress values of the pixel.
In addition it is also necessary to explanation, specific calibration process are：Calibration with frictional resistance balance is face-up, ensure
Air source angle is 0 °, and the entire plane of uniform fold, ensures that plane shear stress direction is identical with airflow direction.In calibration speed
Air source pressure reducing valve is adjusted in the range of degree, changes air velocity, and is recorded under each calibration velocity amplitude corresponding to each measuring point
Shear stress values.The shear stress values τ of each calibration velocity amplitude all pixels point is obtained by linear interpolation method.
All experiment conditions are constant, will demarcate flat inversed, and even application liquid crystal in the plane, repeat above-mentioned adjusting
Air velocity operates, while is shot using CCD, and the shooting each pixel of image is converted to for each calibration velocity amplitude
Hue values.The τ matched curves that the obtained Hue value first steps are obtained, obtain magnitude calibration curve.
In the case of authentic testing, shot using 5 cameras respectively under ± 60 °, ± 30 ° and 0 ° by CCD camera
Image, and obtain hue value Hue of each pixel in each angle.And Gauss is done to Hue- angle φs for each pixel
The fitting of curve, the angle of corresponding Hue values maximum is exactly the position shear stress direction, and the Hue maximum value amounts of being updated to
And the size of shear stress is obtained in calibration curve.It is can obtain all pixels point in whole plane true by the calibration process
Shear stress values.
The embodiment of the present invention additionally provides a kind of computer readable storage medium.It is stored on the computer readable storage medium
There is computer program, which is performed by processor in Fig. 1.
The embodiment of the present invention additionally provides a kind of computer program product for including instruction.When the computer program product exists
When being run on computer so that the method that computer performs above-mentioned Fig. 1.
One of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer read/write memory medium
In, the program is when being executed, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of Pixel-level cuts quick liquid crystal scaling method, which is characterized in that the method includes：
The calibration element with the shape and size all same of part to be measured is made, and processing behaviour is carried out to the calibration plane of the calibration element
Make；
Magnitude calibration curve is obtained by carrying out magnitude proving operation to the calibration element；
The multiple pictures obtained according to shooting calculate form and aspect Hue value of each pixel in multiple angles, and for described
Each pixel carries out the form and aspect Hue values-angle φ the fitting operation of Gaussian curve；
By the form and aspect Hue values-angle of acquisitionThe Gaussian curve described in the maximum values of form and aspect Hue values be substituting to institute
It states in magnitude calibration curve, the τ values of acquisition are the shear stress values of each pixel；
The shear stress values of each pixel according to acquisition are completed to owning in the whole plane of the calibration element
The proving operation of pixel.
2. according to the method described in claim 1, it is characterized in that, the calibration plane to the calibration element carries out processing operation packet
It includes：
The counterbore identical with shear stress measuring device to the first plane manufactured size of the calibration plane of the calibration element；
Quick liquid crystal is cut to the second plane spraying of the calibration plane of the calibration element；
Wherein, the shear stress measuring device is frictional resistance balance, and first plane is there is provided shear stress measurements
The plane of the calibration element of device upward, second plane are back to side plane with first plane.
It is 3. according to the method described in claim 1, it is characterized in that, described by carrying out magnitude proving operation to the calibration element
Magnitude calibration curve is obtained to include：
In a state that the air velocity that the calibration element is subject to is accelerated step by step within a preset range, in preset calibrations velocity interval
One Hue- τ curve is obtained by fitting operation, and is the magnitude calibration curve by the Hue- τ curve definitions.
4. method according to claim 1 or 2, which is characterized in that further include：The shear stress will be provided with and measure dress
First plane put is upward so that air source angle suffered by the calibration element is 0 °, and air source direction is described in uniform fold the
One plane, wherein, the first plane shear stress direction is identical with the air source direction.
5. it according to the method described in claim 1, it is characterized in that, further includes：Filming apparatus is separately positioned on 0 °, ± 30 °
Multi-angled shooting is carried out to obtain multiple pictures with ± 60 ° of positions, wherein, with calibration element described in the vertical face of the filming apparatus
The calibration plane position for 0 °, and the filming apparatus is CCD camera, and the CCD camera is positioned over and the mark
Face is allocated to fix into the surface at 40 ° of angles, and using fixed frame.
6. it according to the method described in claim 5, it is characterized in that, further includes：The filming apparatus is in shooting process, described
Temperature suffered by the directional velocity of air-flow suffered by the velocity magnitude of air-flow suffered by calibration element, the calibration element, the calibration element
Intensity of illumination suffered by degree, the calibration element remains unchanged, wherein, the intensity of illumination is formed as through white lamp position in institute
It states right over calibration plane, forms area source, the area source vertical irradiation is in the calibration plane.
7. it according to the method described in claim 3, it is characterized in that, further includes：Air source pressure reducing valve is adjusted to preset described in air source
It demarcates in velocity interval, in the state of accelerating air velocity step by step, record is corresponding under each calibration velocity amplitude of each measuring point
Shear stress values；
The shear stress values τ of each calibration velocity amplitude all pixels point is obtained by linear interpolation method.
8. the method according to claim 3 or 6, which is characterized in that further include：The second flat of quick liquid crystal is cut based on spraying
Face adjusts air source pressure reducing valve and in preset calibrations velocity interval, in the state of accelerating air velocity step by step, is passing through bat described in air source
It takes the photograph device and obtains the form and aspect Hue values that the shooting each pixel of image is converted to for each calibration velocity amplitude；
By the form and aspect Hue values with being answered by the shearing of each calibration velocity amplitude all pixels point that linear interpolation method obtains
Force value τ carries out curve fitting operation, obtains the magnitude calibration curve.
9. according to claim 1-6 any one of them methods, which is characterized in that is sprayed on the calibration element cuts quick liquid crystal
Thickness it is identical with the expection coating thickness that quick liquid crystal is cut on the part to be measured.
10. a kind of Pixel-level cuts quick liquid crystal caliberating device, which is characterized in that described device includes：
Pretreatment operation module, for making the calibration element with the shape and size all same of part to be measured, and to the calibration element
Calibration plane carry out processing operation；
Magnitude calibration curve acquisition module, for obtaining magnitude calibration song by carrying out magnitude proving operation to the calibration element
Line；
Fitting operation module, multiple pictures for being obtained according to shooting calculate form and aspect of each pixel in multiple angles
Hue values, and for each described pixel to the fitting operation of the form and aspect Hue values-angle φ progress Gaussian curve；
Pixel shear stress values acquisition module, for the form and aspect Hue values-angle that will be obtainedThe Gaussian curve in
The maximum value of the form and aspect Hue values is substituting in the magnitude calibration curve, and the τ values of acquisition are each pixel
Shear stress values；
Demarcating module is completed for the shear stress values of each pixel according to acquisition to the calibration element
The proving operation of all pixels point in whole plane.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112634376A (en) * | 2020-12-25 | 2021-04-09 | 深圳中科飞测科技股份有限公司 | Calibration method and device, calibration equipment and storage medium |
| CN112634376B (en) * | 2020-12-25 | 2024-06-04 | 深圳中科飞测科技股份有限公司 | Calibration method and device, calibration equipment and storage medium |
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