CN104634261A - Line laser source based medium plate shape inspection system and method - Google Patents
Line laser source based medium plate shape inspection system and method Download PDFInfo
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- CN104634261A CN104634261A CN201410735670.8A CN201410735670A CN104634261A CN 104634261 A CN104634261 A CN 104634261A CN 201410735670 A CN201410735670 A CN 201410735670A CN 104634261 A CN104634261 A CN 104634261A
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Abstract
The invention discloses a line laser source based medium plate shape inspection system and method. A to-be-inspected medium plate is placed on a conveying belt to be conveyed, a counter is connected through a serial port to realize communication with a computer, a pulse signal of the counter is read through labview and is converted into running speed in the horizontal direction of the medium plate so as to acquire transverse coordinates, meanwhile laser rays irradiate on the steel plate, and images in the laser ray irradiation region are captured with certain frequency via a coms industrial camera and transmitted to the computer. A Labview Vision module is applied to directly read acquired image information and process and stitch the images, coordinates of two ends of a bright line are extracted so as to acquire longitudinal coordinates, and integral contour information of the inspected steel plate is acquired finally by means of curve fitting. The laser field is controllable, and precision is improved by the application of the image stitching technique and specific anti-interfere processing on the images. The pulse speed measurement principle is adopted, and equipment cost performance is high.
Description
Technical field
The present invention relates to Shap feature detection system and method thereof, particularly relate to a kind of cut deal Shap feature detection system based on lasing light emitter and method thereof.
Background technology
Medium plate sheet material, as parts or the starting material in national economy and national defense construction association area with widespread use, has strong demand to the Shape measure technology of medium plate all the time.Particularly along with this base part is to production scale, environment for use extremalization and the direction develop rapidly such as relevant device maximization and high speed; the Shape measure technology of medium plate embodies its importance and urgency more, and has higher requirement to this technology in reliability, real-time and automatic on-line detectability thereof etc.At present, although cut deal Shape measure technology huge number, but because the reliability of the image detecting technique based on laser is constantly improved, in addition it has the advantage that other method is difficult to match in excellence or beauty in security, applicability, automatic capability and feature extraction are rich etc., this technology has become Shape measure field and has been most widely used and one of the method containing great potential, and becomes the focus of correlative study.Therefore, there is the cut deal sheet material of widespread use occasion and huge market potential for detected object, carry out the research of high-performance automatic online image etection theory and technology, give its highly reliable, high real-time and high-precision detectability, there is very important theory significance and practical value.
Based on the high-performance automatic online cut deal Shape measure technology that laser field is controlled, under referring to different operating modes, when detecting the sheet material of different parameters, can adaptively modifying laser field, be projected at best combination of light sources, best angle on the sheet material that roller-way moves, utilize high speed camera, and after real-time Treatment Analysis, complete the automatic detection of the aspects such as sheet material Head and Tail Shape, width, length, side shape, camber and flatness.Abroad, industrially developed country rate prior theory, technology and application etc. has carried out research for this technology at many levels, the leading companys such as Sweden ABB, German LAP, Canadian KELK, Belgian IRM group just progressively release practical product from last century, particularly obtain applying the most widely in the quality testing of steel plate automatic online.
At present, owing to not adopting the laser field controlling technology of optimization, once tested steel plate does not have Right Aligns, the data detected cannot carry out matching to pattern; And the environmental interference such as dust, the globule, image blurring by what make to detect, thus affect precision.In addition, once system existing problems, foreign study producer because of system not mature enough, maintenance is dilatory, has a strong impact on progress.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of cut deal Shap feature detection system based on lasing light emitter and method thereof are provided.
Cut deal Shap feature detection system based on lasing light emitter comprises closed box, coms industrial camera, usb expansion card, thermal source, temperature sensor, temperature controller, computing machine, serial converter, counter, photoelectric signal receiver, cut deal to be measured, photoelectricity laser generator, laser line generator, stepper motor driver, line laser support, line speed controller, stepper motor, line laser intensity controller, coms industrial camera is provided with in closed box, usb expansion card, laser line generator, stepper motor driver, line laser support, stepper motor, usb expansion card is connected with multiple coms industrial camera, line laser support is provided with laser line generator, stepper motor, stepper motor driver is connected with stepper motor, closed box is provided with thermal source, temperature sensor, temperature controller respectively with thermal source, temperature sensor is connected, computing machine respectively with temperature controller, serial converter, stepper motor driver, line speed controller, line laser intensity controller is connected, counter respectively with serial converter, photoelectric signal receiver, photoelectricity laser generator is connected, laser line generator is connected with line laser intensity controller.
Cut deal Shape measure method based on lasing light emitter comprises the steps:
1) cut deal surface elevation to be measured is measured:
By laser line generator formed longitudinal pixel coordinate of bright line and cut deal surface elevation to be measured between relation, obtain cut deal surface elevation value.
2) many height of detection system are demarcated:
The mode of many highly demarcation is adopted to carry out vision calibration to detection system, to obtain the longitudinal coordinate of bright line and the funtcional relationship of calibrated altitude in actual (tube) length angle value vision overlapping region in image represented by pixel and image.
3) based on the image zooming-out of labview:
Industrial camera carries out shooting to the cut deal image to be measured on travelling belt and obtains, and then by its communication with computing machine of programming realization based on labview, and realizes setting interval BR, adjusts pixel function;
4) image procossing:
There is a lot of defect in original acquisition cut deal to be measured image information, needs to carry out anti-interference process, comprising picture noise process and binary conversion treatment.
5) image mosaic:
The Image Acquisition instrument of detection system is made up of two industrial cameras, and two cameras obtain respectively surveys cut deal image information, by the splicing to two images, thus effectively avoids the impact of camera vision overlapping region.
6) counter tests the speed
First pulse information is transmitted by photoelectric signal receiver to counter, and and computer communication, obtain pulse signal, by the distance transform in recurrent interval, draw and survey the image-related lateral coordinates information of cut deal.
7) contour fitting
By image procossing and image mosaic technology, finally get the terminal point information at cut deal image two ends to be measured, the i.e. information of longitudinal coordinate, the velocity information simultaneously obtained by counter measuring principle obtains the information of lateral coordinates by distance transform, realize cut deal contour fitting to be measured by the method for curve.
Described step 1) comprising: laser line generator is beaten on cut deal to be measured with set angle, when cut deal surface elevation to be measured changes, laser rays will move along cut deal length direction to be measured thereupon, linear relationship is there is between longitudinal pixel coordinate of bright line formed by laser line generator and cut deal surface elevation to be measured, by obtaining longitudinal pixel coordinate of the bright line under different altitudes, carry out curve fitting, utilize the function expression of matching to calculate the height value on cut deal surface to be measured.
Described step 2) comprising: many principles of highly demarcating are first use the scaling board of known length, its surface elevation is changed by lifting, by industrial camera obtain laser line generator in differing heights situation become the longitudinal coordinate value of bright line and the image overlapping region of two industrial cameras, the longitudinal coordinate Y of bright line and the funtcional relationship of scaling board height in the actual (tube) length angle value λ, vision overlapping region K and the image that utilize the mode of curve to try to achieve in image represented by pixel respectively.Funtcional relationship again by obtaining more accurately detects the height value on cut deal 11 locus to be measured coordinate and the high surface of band.
Described step 4) comprising: random noise is the overriding noise composition affecting picture quality and testing result, for the random noise comprised in the picture, also the complexity of algorithm is considered, spatial domain denoising method is selected to carry out de-noising to cut deal gained image, the mode of experiment medium filtering carrys out de-noising, medium filtering is simple and practical non-linear filtering method, the value of central pixel point is replaced with the pixel value in template field, binary conversion treatment is carried out with follow-on Ostu global threshold algorithm after denoising Processing, the threshold value that modified Ostu is different according to the employing of different images.
Described step 5) comprising: in cut deal image to be measured, bright line left end point is W to the number of pixels of optic centre line transverse direction
2be W with bright line right endpoint in right camera image to the number of pixels of optic centre line transverse direction
3, after the vision calibration of industrial camera, convert the pixel coordinate of bright line end points in image the locus coordinate of cut deal side edge to be measured to by following formula;
The locus Y of cut deal left side edge
2for:
Y
2＝λ·W
2
The locus Y of cut deal right side edge
3for:
Y
3＝λ·W
3
In above formula, λ is the physical length in cut deal image to be measured represented by a pixel, and λ is relevant with the surperficial distance h from camera plane of tested cut deal, is demarcated the relation determined between λ and h, Y by industrial camera
1being the mounting distance between two cameras, is a known parameters of system;
The width Y of cut deal to be measured is obtained by following formulae discovery:
Y＝Y
1+Y
2+Y
3
Namely
Y＝Y
1+λ·W
2+λ·W
3。
Described step 6) comprising: due to industrial camera setting interval BR, the translational speed of the lateral coordinates that the cut deal image longitudinal coordinate to be measured that different time points obtains is corresponding and cut deal to be measured is linear, the acquisition of its lateral coordinates is realized by the translational speed obtaining cut deal to be measured, the time data T between two pulses is intercepted by the event structure in Labview software, because the distance between borehole S between two pulses is known, required speed is obtained by V=S/T, use the method for weighted mean value and boundary condition setting to carry out the velocity information of debug by function design simultaneously:
V=α
1v
i+ α
2v
i-1+ α
3v
i-2, wherein α
1+ α
2+ α
3=1
Work as V
inot disturbed, namely information is in correct scope n≤V
i≤ m, n, m determine with requirement of experiment, then α
1=0.9, α
2=0.05, α
3=0.05,
If V in the information obtained
inot in span, then α
1=0, α
2=0.9, α
3=0.1.
The beneficial effect that the present invention compared with prior art has:
The width information of cut deal can also reflected in real time while detecting for the purpose of cut deal profile.Width due to cut deal is also an important parameter in Rolling production process, reflects the quality of rolling cut deal.This contactless contour detecting can detect cut deal profile more conveniently.Whole detection is directly tangible by Labview software integrationization, more efficient and convenient, and velocity measuring uses pulse measuring principle, and detecting instrument cost performance is high.Add temperature control modules, detection system critical piece can be run in the working environment of a temperature, and adopt the image procossing mode of image mosaic and improvement, improve the precision of detection better.Simultaneously due to the controllability of emission angle, by gathering the line laser imaging of different angles and position, com-parison and analysis various situation experiment gained testing result, chooses optimal case, very the reliability of high detection system.
Accompanying drawing explanation
Fig. 1 is the cut deal Shap feature detection system structural representation based on lasing light emitter;
Fig. 2 is that the one-level of present system controls to implement structured flowchart;
Fig. 3 is that the Two-stage control of present system implements structured flowchart;
Fig. 4 is the enforcement theory diagram of the inventive method;
Fig. 5 (a) is that the end points based on labview of the inventive method extracts theory diagram;
Fig. 5 (b) be the inventive method based on lateral coordinates extract theory diagram;
Fig. 6 is the transverse velocity information extraction theory diagram of the inventive method:
Fig. 7 is the left and right camera image splicing schematic diagram of the inventive method.
Embodiment
Based on the cut deal Shap feature detection system of lasing light emitter, it is characterized in that comprising closed box 1, coms industrial camera 2, usb expansion card 3, thermal source 4, temperature sensor 5, temperature controller 6, computing machine 7, serial converter 8, counter 9, photoelectric signal receiver 10, cut deal to be measured 11, photoelectricity laser generator 12, laser line generator 13, stepper motor driver 14, line laser support 15, line speed controller 16, stepper motor 17, line laser intensity controller 18, coms industrial camera 2 is provided with in closed box 1, usb expansion card 3, laser line generator 13, stepper motor driver 14, line laser support 15, stepper motor 17, usb expansion card 3 is connected with multiple coms industrial camera 2, line laser support 15 is provided with laser line generator 13, stepper motor 17, stepper motor driver 14 is connected with stepper motor 17, closed box 1 is provided with thermal source 4, temperature sensor 5, temperature controller 6 respectively with thermal source 4, temperature sensor 5 is connected, computing machine 7 respectively with temperature controller 6, serial converter 8, stepper motor driver 14, line speed controller 16, line laser intensity controller 18 is connected, counter 9 respectively with serial converter 8, photoelectric signal receiver 10, photoelectricity laser generator 12 is connected, laser line generator 13 is connected with line laser intensity controller 18.
Environment temperature obtains precision for final data a lot of impacts, in order to reduce the impact that temperature causes for detection system, each coms industrial camera 2 and thermal source 4, temperature sensor 5, stepper motor 17, laser line generator 13, stepper motor drive and are all put in closed box 1, temperature sensor 5 transmits data by temperature controller 6 to computing machine 1, can realize the adjustment of temperature by control of heat source 4 eventually through computing machine.Control step motor 17 is loaded among line laser support 15, and computing machine 7 is connected with stepper motor driver 14, by stepper motor driver 14 control step motor 17, to reach the object realizing laser line generator 13 adjustable angle.Computing machine 7 is connected with line laser intensity controller 18, is changed the light intensity of laser line generator 13 by line laser intensity controller 18.Computing machine 7 is connected with line speed controller 16, is controlled the transfer rate of travelling belt by line speed controller 16.
Cut deal Shape measure method based on lasing light emitter comprises the steps:
1) cut deal 11 surface elevation to be measured is measured:
By laser line generator 13 formed longitudinal pixel coordinate of bright line and cut deal to be measured 11 surface elevation between relation, obtain cut deal 11 surface elevation value.
2) many height of detection system are demarcated:
The mode of many highly demarcation is adopted to carry out vision calibration to detection system, to obtain the longitudinal coordinate of bright line and the funtcional relationship of calibrated altitude in actual (tube) length angle value vision overlapping region in image represented by pixel and image.
3) based on the image zooming-out of labview:
Cut deal to be measured 11 image on industrial camera 2 pairs of travelling belts carries out shooting and obtains, and then by its communication with computing machine 7 of programming realization based on labview, and realizes setting interval BR, adjusts pixel function;
4) image procossing:
There is a lot of defect in original acquisition cut deal to be measured 11 image information, needs to carry out anti-interference process, comprising picture noise process and binary conversion treatment.
5) image mosaic:
The Image Acquisition instrument of detection system is made up of two industrial cameras 2, and two cameras obtain respectively surveys cut deal 11 image information, by the splicing to two images, thus effectively avoids the impact of camera vision overlapping region.
6) counter tests the speed
First transmit pulse information by photoelectric signal receiver 10 to counter 9, and with computing machine 7 communication, obtain pulse signal, by the distance transform in recurrent interval, draw and survey the image-related lateral coordinates information of cut deal 11.
7) contour fitting
By image procossing and image mosaic technology, finally get the terminal point information at cut deal 11 image two ends to be measured, the i.e. information of longitudinal coordinate, the velocity information simultaneously obtained by counter measuring principle obtains the information of lateral coordinates by distance transform, realize cut deal 11 contour fitting to be measured by the method for curve.
Described step 1) comprising: laser line generator 2 is beaten on cut deal 11 to be measured with set angle, when cut deal 11 surface elevation to be measured changes, laser rays will move along cut deal 11 length direction to be measured thereupon, linear relationship is there is between longitudinal pixel coordinate of bright line formed by laser line generator 13 and cut deal to be measured 11 surface elevation, by obtaining longitudinal pixel coordinate of the bright line under different altitudes, carry out curve fitting, utilize the function expression of matching to calculate the height value on cut deal 11 surface to be measured.
Described step 2) comprising: many principles of highly demarcating are first use the scaling board of known length, its surface elevation is changed by lifting, by industrial camera 2 obtain laser line generator 2 in differing heights situation become the longitudinal coordinate value of bright line and the image overlapping region of two industrial cameras 2, the longitudinal coordinate Y of bright line and the funtcional relationship of scaling board height in the actual (tube) length angle value λ, vision overlapping region K and the image that utilize the mode of curve to try to achieve in image represented by pixel respectively.Funtcional relationship again by obtaining more accurately detects the height value on cut deal 11 locus to be measured coordinate and the high surface of band.
Described step 4) comprising: random noise is the overriding noise composition affecting picture quality and testing result, for the random noise comprised in the picture, also the complexity of algorithm is considered, spatial domain denoising method is selected to carry out de-noising to cut deal 11 gained image, the mode of experiment medium filtering carrys out de-noising, medium filtering is simple and practical non-linear filtering method, the value of central pixel point is replaced with the pixel value in template field, binary conversion treatment is carried out with follow-on Ostu global threshold algorithm after denoising Processing, the threshold value that modified Ostu is different according to the employing of different images.
Described step 5) comprising: in cut deal 11 image to be measured, bright line left end point is W to the number of pixels of optic centre line transverse direction
2be W with bright line right endpoint in right camera image to the number of pixels of optic centre line transverse direction
3, after the vision calibration of industrial camera 2, by following formula, the pixel coordinate of bright line end points in image is converted to the locus coordinate of cut deal 11 side edge to be measured;
The locus Y of cut deal left side edge
2for:
Y
2＝λ·W
2
The locus Y of cut deal right side edge
3for:
Y
3＝λ·W
3
In above formula, λ is the physical length in cut deal 11 image to be measured represented by a pixel, and λ is relevant from the distance h of camera plane with tested cut deal 11 surface, is demarcated the relation determined between λ and h, Y by industrial camera 2
1being the mounting distance between two cameras, is a known parameters of system;
The width Y of cut deal 11 to be measured is obtained by following formulae discovery:
Y＝Y
1+Y
2+Y
3
Namely
Y＝Y
1+λ·W
2+λ·W
3。
Described step 6) comprising: because industrial camera 2 sets interval BR, the translational speed of the lateral coordinates that the cut deal to be measured 11 image longitudinal coordinate that different time points obtains is corresponding and cut deal to be measured 11 is linear, the acquisition of its lateral coordinates is realized by the translational speed obtaining cut deal 11 to be measured, the time data T between two pulses is intercepted by the event structure in Labview software, because the distance between borehole S between two pulses is known, required speed is obtained by V=S/T, use the method for weighted mean value and boundary condition setting to carry out the velocity information of debug by function design simultaneously:
V=α
1v
i+ α
2v
i-1+ α
3v
i-2, wherein α
1+ α
2+ α
3=1
Work as V
inot disturbed, namely information is in correct scope n≤V
i≤ m, n, m determine with requirement of experiment, then α
1=0.9, α
2=0.05, α
3=0.05,
If V in the information obtained
inot in span, then α
1=0, α
2=0.9, α
3=0.1.
Claims (7)
1. the cut deal Shap feature detection system based on lasing light emitter, it is characterized in that comprising closed box (1), coms industrial camera (2), usb expansion card (3), thermal source (4), temperature sensor (5), temperature controller (6), computing machine (7), serial converter (8), counter (9), photoelectric signal receiver (10), cut deal to be measured (11), photoelectricity laser generator (12), laser line generator (13), stepper motor driver (14), line laser support (15), line speed controller (16), stepper motor (17), line laser intensity controller (18), coms industrial camera (2) is provided with in closed box (1), usb expansion card (3), laser line generator (13), stepper motor driver (14), line laser support (15), stepper motor (17), usb expansion card (3) is connected with multiple coms industrial camera (2), and line laser support (15) is provided with laser line generator (13), stepper motor (17), stepper motor driver (14) is connected with stepper motor (17), and closed box (1) is provided with thermal source (4), temperature sensor (5), temperature controller (6) respectively with thermal source (4), temperature sensor (5) be connected, computing machine (7) respectively with temperature controller (6), serial converter (8), stepper motor driver (14), line speed controller (16), line laser intensity controller (18) be connected, counter (9) respectively with serial converter (8), photoelectric signal receiver (10), photoelectricity laser generator (12) is connected, and laser line generator (13) is connected with line laser intensity controller (18).
2. use the cut deal Shape measure method based on lasing light emitter of system as claimed in claim 1, it is characterized in that it comprises the steps:
1) cut deal to be measured (11) surface elevation is measured:
By laser line generator (13) formed longitudinal pixel coordinate of bright line and cut deal to be measured (11) surface elevation between relation, obtain cut deal (11) surface elevation value.
2) many height of detection system are demarcated:
The mode of many highly demarcation is adopted to carry out vision calibration to detection system, to obtain the longitudinal coordinate of bright line and the funtcional relationship of calibrated altitude in actual (tube) length angle value vision overlapping region in image represented by pixel and image.
3) based on the image zooming-out of labview:
Industrial camera (2) carries out shooting to cut deal to be measured (11) image on travelling belt and obtains, then by the communication of programming realization itself and the computing machine (7) based on labview, and realize setting interval BR, adjustment pixel function;
4) image procossing:
There is a lot of defect in original acquisition cut deal to be measured (11) image information, needs to carry out anti-interference process, comprising picture noise process and binary conversion treatment.
5) image mosaic:
The Image Acquisition instrument of detection system is made up of two industrial cameras (2), two cameras obtain respectively surveys cut deal (11) image information, by the splicing to two images, thus effectively avoid the impact of camera vision overlapping region.
6) counter tests the speed
First pulse information is transmitted by photoelectric signal receiver (10) to counter (9), and with computing machine (7) communication, obtain pulse signal, by the distance transform in recurrent interval, draw and survey the image-related lateral coordinates information of cut deal (11).
7) contour fitting
By image procossing and image mosaic technology, finally get the terminal point information at cut deal to be measured (11) image two ends, the i.e. information of longitudinal coordinate, the velocity information simultaneously obtained by counter measuring principle obtains the information of lateral coordinates by distance transform, realize cut deal to be measured (11) contour fitting by the method for curve.
3. a kind of cut deal Shape measure method based on lasing light emitter as claimed in claim 2, it is characterized in that described step 1) comprising: laser line generator (2) is beaten on cut deal to be measured (11) with set angle, when cut deal to be measured (11) surface elevation changes, laser rays will move along cut deal to be measured (11) length direction thereupon, linear relationship is there is between longitudinal pixel coordinate of the formed bright line of laser line generator (11) and cut deal to be measured (11) surface elevation, by obtaining longitudinal pixel coordinate of the bright line under different altitudes, carry out curve fitting, the function expression of matching is utilized to calculate the height value on cut deal to be measured (11) surface.
4. a kind of cut deal Shape measure method based on lasing light emitter as claimed in claim 2, it is characterized in that described step 2) comprising: many principles of highly demarcating are first use the scaling board of known length, its surface elevation is changed by lifting, by industrial camera (2) obtain laser line generator (13) in differing heights situation become the longitudinal coordinate value of bright line and the image overlapping region of two industrial cameras (2), the mode of curve is utilized to try to achieve actual (tube) length angle value λ in image represented by pixel respectively, the longitudinal coordinate Y of bright line and the funtcional relationship of scaling board height in vision overlapping region K and image.Funtcional relationship again by obtaining more accurately detects the height value on cut deal to be measured (11) locus coordinate and the high surface of band.
5. a kind of cut deal Shape measure method based on lasing light emitter as claimed in claim 2, it is characterized in that described step 4) comprising: random noise is the overriding noise composition affecting picture quality and testing result, for the random noise comprised in the picture, also the complexity of algorithm is considered, spatial domain denoising method is selected to carry out de-noising to cut deal (11) gained image, the mode of experiment medium filtering carrys out de-noising, medium filtering is simple and practical non-linear filtering method, the value of central pixel point is replaced with the pixel value in template field, binary conversion treatment is carried out with follow-on Ostu global threshold algorithm after denoising Processing, the threshold value that modified Ostu is different according to the employing of different images.
6. a kind of cut deal Shape measure method based on lasing light emitter as claimed in claim 2, is characterized in that described step 5) comprising: in cut deal to be measured (11) image, bright line left end point is W to the number of pixels of optic centre line transverse direction
2be W with bright line right endpoint in right camera image to the number of pixels of optic centre line transverse direction
3, after the vision calibration of industrial camera (2), convert the pixel coordinate of bright line end points in image the locus coordinate of cut deal to be measured (11) side edge to by following formula;
The locus Y of cut deal left side edge
2for:
Y
2＝λ·W
2
The locus Y of cut deal right side edge
3for:
Y
3＝λ·W
3
In above formula, λ is the physical length in cut deal to be measured (11) image represented by a pixel, λ is relevant with the surperficial distance h from camera plane of tested cut deal (11), is demarcated the relation determined between λ and h, Y by industrial camera (2)
1being the mounting distance between two cameras, is a known parameters of system;
The width Y of cut deal 11 to be measured is obtained by following formulae discovery:
Y＝Y
1+Y
2+Y
3
Namely
Y＝Y
1+λ·W
2+λ·W
3。
7. a kind of cut deal Shape measure method based on lasing light emitter as claimed in claim 2, it is characterized in that described step 6) comprising: due to industrial camera (2) setting interval BR, the translational speed of the lateral coordinates that cut deal to be measured (11) the image longitudinal coordinate that different time points obtains is corresponding and cut deal to be measured (11) is linear, the acquisition of its lateral coordinates is realized by the translational speed obtaining cut deal to be measured (11), the time data T between two pulses is intercepted by the event structure in Labview software, because the distance between borehole S between two pulses is known, required speed is obtained by V=S/T, use the method for weighted mean value and boundary condition setting to carry out the velocity information of debug by function design simultaneously:
V=α
1v
i+ α
2v
i-1+ α
3v
i-2, wherein α
1+ α
2+ α
3=1
Work as V
inot disturbed, namely information is in correct scope n≤V
i≤ m, n, m determine with requirement of experiment, then α
1=0.9, α
2=0.05, α
3=0.05,
If V in the information obtained
inot in span, then α
1=0, α
2=0.9, α
3=0.1.
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| CN106767419A (en) * | 2017-01-19 | 2017-05-31 | 佛山职业技术学院 | A kind of significantly furring tile method for quick based on optical detection |
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| CN114322802A (en) * | 2021-12-30 | 2022-04-12 | 苏州中科行智智能科技有限公司 | Line diameter measuring method based on 3D line laser camera |
| CN117911419A (en) * | 2024-03-20 | 2024-04-19 | 东北大学 | Method and device for detecting steel rotation angle enhancement of medium plate, medium and equipment |
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