CN102840948A - Batch calibration equipment and batch calibration method for intelligent pointer-type pressure gages - Google Patents
Batch calibration equipment and batch calibration method for intelligent pointer-type pressure gages Download PDFInfo
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- CN102840948A CN102840948A CN2012103671973A CN201210367197A CN102840948A CN 102840948 A CN102840948 A CN 102840948A CN 2012103671973 A CN2012103671973 A CN 2012103671973A CN 201210367197 A CN201210367197 A CN 201210367197A CN 102840948 A CN102840948 A CN 102840948A
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Abstract
The invention discloses batch calibration equipment and a batch calibration method for intelligent pointer-type pressure gages. The batch calibration equipment comprises a horizontal calibration platform, a horizontal testing pipe, a plurality of quick connectors for being installed on a plurality of calibration pressure meters respectively, two image acquisition devices which are located in front of the horizontal calibration platform, an image processing device, a pressurization device and a pressure regulation device which regulates pressure in the horizontal testing pipe. The batch calibration method comprises the following steps of: firstly, doing a preparation work before calibration; secondly, inputting and matching models of the pressure gages to be calibrated; thirdly, obtaining data of dial plate templates; fourth, acquiring and dividing images of dial plates, and detecting straight lines at which pointers are located; fifth, matching the templates; sixth, obtaining numberical reading of the pressure meters, and the numberical reading obtaining process comprises the following steps of: obtaining dial plate image information to be processed, matching binocular stereo-vision images and processing the data. The batch calibration equipment disclosed by the invention is reasonable in design, simple and convenient in use and operation, has a good use effect, and calibration efficiency and calibration accuracy of the pointer-type pressure gages are greatly improved.
Description
Technical field
The invention belongs to the instrument check technical field, especially relate to a kind of intelligent pointer pressure calibration equipment and batch method of calibration in batches.
Background technology
In the field produces operational process, because the elastic sensing element of pointer pressure has very high physical strength, and have advantages such as simple in structure, that cost is lower, and dependable performance, maintenance and repair are convenient, thereby obtain application more and more widely.Along with the development of Digital Electronic Technique, the part pointer pressure is replaced by digital instrument, high, the readability of digital instrument accuracy, but when measured quick variation or when fluctuating back and forth, and the indicating value of digital instrument can corresponding quick variation and difficult by reading; If control shows the time interval, will ignore variation details therebetween.Thereby from this angle, pointer pressure occupies clear superiority; It can reflect the measurement variation scope intuitively, and because the pointer pressure structure is simple relatively, easy to install; Cost is lower, is therefore still bringing into play irreplaceable effect.But pointer pressure is after after a while use and pressurized, and movement some distortion and wearing and tearing can occur unavoidably, and correspondingly pointer pressure will produce various sum of errors faults.In order to guarantee, pointer original accuracy and do not make the transmission of quantity value distortion needs timely assay calibration, to guarantee indicating correct, reliable.
At present; Domestic calibration operation to this type of pointer pressure mainly is to adopt the method for artificial observation instrument dial plate total indicator reading to carry out verification; During actual verification; Have following defective and deficiency: the first, receive the influence of people's subjective factor such as observation angle, observed range and fatigue strength etc., the number of degrees error of existence is bigger, and reliability is not high; The second, during actual verification, adopt and manually pressurize, thereby inefficiency, and labour intensity is big; Three, long-time meter reading dish easy fatigue, thus the interpretation mistake produced; Four, the single meter reading of desk checking, operating process is loaded down with trivial details; Five, the various calibration tailss of hand filling are printed the verification certificate, inefficiency.In addition, though occur some pointer pressure automatic verification systems on the market, existing pointer pressure automatic verification system all exists to use to some extent operates number of drawbacks and deficiencies such as inconvenience, calibrating efficient is low, verification result is inaccurate.Thereby, how to realize the automatic Verification of pointer pressure, to improve calibrating efficient, calibrating accuracy, just become a problem that presses for solution.
Summary of the invention
Technical matters to be solved by this invention is to above-mentioned deficiency of the prior art, provide a kind of simple in structure, reasonable in design, install and lay convenient and easy, the intelligent degree of pressure regulation intelligent pointer pressure high, that test effect is good in batches calibration equipment in batches.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: a kind of intelligent pointer pressure is calibration equipment in batches; It is characterized in that: the pressue device that comprises the horizontal check platform, is installed on horizontal checkout pipe on the horizontal check platform, supplies a plurality of a plurality of rapid-acting couplings of being installed by the verification tensimeter respectively, is positioned at horizontal check platform the place ahead and the image processing equipment that joins to a plurality of said two image capture devices that absorbed by the manometric dial plate image of verification, with two said image capture devices, the horizontal checkout pipe is pressurizeed and through controlling the regulator that said pressue device adjusts accordingly the pipe internal pressure of horizontal checkout pipe; Said pressue device joins through connecting tube and horizontal checkout pipe, and said pressue device and said regulator join; A plurality of said identical with the quantity of a plurality of said rapid-acting couplings by the manometric quantity of verification; The structure of a plurality of said rapid-acting couplings all identical with size and its all be laid in same horizontal linear l
1On, a plurality of said rapid-acting couplings are installed on the horizontal checkout pipe; Two said image capture devices all are laid in same horizontal linear l
2On, horizontal linear l wherein
2With horizontal linear l
1Parallel and the spacing between the two is more than the 1m; A plurality of said rapid-acting couplings all are vertically to laying, and the spacing between adjacent two the said rapid-acting couplings in the left and right sides is 10cm～50cm, and the spacing between two said image capture devices is 40cm～80cm; A plurality ofly saidly be the tensimeter of same model, and a plurality ofly saidly be even laying by the verification tensimeter by the verification tensimeter.
Above-mentioned intelligent pointer pressure is calibration equipment in batches, it is characterized in that: said horizontal linear l
2With horizontal linear l
1Between spacing be 1m～2m.
Above-mentioned intelligent pointer pressure is calibration equipment in batches, and it is characterized in that: two said image capture devices are the DV of same model or the digital camera of same model.
Above-mentioned intelligent pointer pressure is calibration equipment in batches, it is characterized in that: a plurality of saidly all be on the same surface level by verification tensimeter and two said image capture devices; Said horizontal check platform the place ahead is provided with two mount pads that supply two said image capture devices to install respectively.
Above-mentioned intelligent pointer pressure is calibration equipment in batches, and it is characterized in that: said horizontal check platform is provided with the wall that exterior color is a single color.
Above-mentioned intelligent pointer pressure is calibration equipment in batches, and it is characterized in that: said pressue device is a hydraulic system, and said connecting tube is a fluid pressure line; The hydraulic control valve that said hydraulic system comprises the hydraulic reservoir that joins with fluid pressure line, be installed in the hydraulic pump on the fluid pressure line and be installed on the fluid pressure line and the fluid pressure in the fluid pressure line is adjusted; Said hydraulic control valve is hand valve or motorized valve, and said regulator should be pressure regulation handwheel that is installed on the said hand valve or the voltage regulator controllers that joins with said motorized valve mutually.
Simultaneously, the invention also discloses a kind of method step simple, realize convenient and calibrating speed is fast, the calibrating accuracy is high pointer pressure method of calibration in batches, it is characterized in that this method may further comprise the steps:
Preliminary work before the step 1, verification: saidly be installed on respectively in a plurality of said rapid-acting couplings a plurality of earlier, restart said pressue device, and the pipe internal pressure of horizontal checkout pipe is adjusted to the required pressure of verification through said regulator by the verification tensimeter; A plurality of said rapid-acting couplings and a plurality ofly saidly be m by the manometric quantity of verification;
Said dial plate template database internal memory is stored in the data storage cell that joins with image processing equipment, and has the dial plate template data of a plurality of different model pointer pressures in the said dial plate template database; The dial plate template data of each model pointer pressure includes respectively and two corresponding two groups of template datas of said image capture device; And each group template data includes m dial plate image information that is installed on m this model pointer pressure in the said rapid-acting coupling respectively, and said dial plate image information comprises the pixel location data of dial plate central point, scale mark reference position and scale mark final position;
Step 301, dial plate IMAQ and synchronous transmission: adopt two said image capture devices and according to identical magnification ratio; Gathered by the manometric dial plate image of verification m in the step 1 is said respectively; And with institute's images acquired synchronous driving to image processing equipment, the identical pending image of corresponding acquisition two width of cloth sizes; In two said pending images, all comprise a plurality of said by the manometric dial plate image of verification;
Step 302, dial plate image segmentation: said image processing equipment calls the image segmentation module, respectively two said pending images in the step 2 cut apart, and two groups of single dial plate images after obtaining to cut apart; Include m single dial plate image in two groups of said single dial plate images, and m said single dial plate image be respectively in the step 1 m said by the manometric dial plate image of verification;
Step 303, dial plate image information acquisition: said image processing equipment obtains the dial plate image information of each single dial plate image in two groups of said single dial plate images respectively, just the corresponding dial plate template data of institute's input pressure table model in acquisition and the step 2; Wherein, the dial plate image information of every single dial plate image includes the pixel location data of dial plate central point, scale mark reference position and scale mark final position in this single dial plate image; Simultaneously, said image processing equipment calls the straight-line detection module, detects in two groups of said single dial plate images the equation of pointer place straight line in each single dial plate image respectively;
Step 304, dial plate template data are added: with obtained in the step 303 with step 2 in the corresponding dial plate template data of institute's input pressure table model, be added in the said dial plate template database; Afterwards, get into step 6;
Step 601, pending dial plate image information acquisition: said image processing equipment is transferred out current read respectively by manometric two the single dial plate images of verification in said pending information;
Step 602, binocular stereo vision images match: said image processing equipment calls binocular stereo vision images match module; Information to be matched to transferring two single dial plate images in the step 601 is handled, and the dial plate image information after the corresponding acquisition coupling; The equation of pointer place straight line in the dial plate image information that said information to be matched is two said single dial plate images and two the single dial plate images, and the dial plate image information after the coupling is that the current read that obtains after the coupling is belonged to straight line l by the pixel location data of the manometric dial plate central point of verification, scale mark reference position and scale mark final position and pointer
5Equation;
Step 603, data processing: said image processing equipment is according to the dial plate image information after mating in the step 602, and combination is by verification manometric range Δ c and measurement lower limit value c
0, extrapolate current read automatically by the manometric reading of verification.
Said method is characterized in that: the image segmentation module described in the step 302 is that histogram thresholding is cut apart module, and the straight-line detection module described in step 303 and the step 4 is the Hough conversion module.
Said method; It is characterized in that: when in the step 603 current read being calculated by the manometric reading of verification automatically; Said image processing equipment is extrapolated dial plate central point and scale mark reference position place straight line l earlier according to the pixel location data of dial plate central point, scale mark reference position and scale mark final position in the coupling back dial plate image information in the step 602
3Equation and dial plate central point and scale mark final position place straight line l
4Equation; Afterwards, again according to straight line l
3With straight line l
4Equation extrapolate straight line l
3With straight line l
4Between included angle A, and according to straight line l
3With pointer place straight line l
5Equation, extrapolate straight line l
3With straight line l
5Between included angle B; Then, according to formula
Calculate current read by the manometric reading c of verification.
Said method is characterized in that: carry out in the step 1 need number m said rapid-acting coupling earlier, and m said rapid-acting coupling being respectively 1# joint, 2# joint, 3# joint from left to right after the numbering before the preceding preliminary work of verification ... The m# joint; Accordingly, installed in m the said rapid-acting coupling m said is respectively 1#, 2#, 3# by the manometric sequence number of verification ... M#;
Current read is i# by the manometric sequence number of verification in the step 601, wherein i=1,2,3 ... M;
Automatically extrapolate in the step 603 current read by the manometric reading of verification after, said image processing equipment also needs to carry out error to the reading of extrapolating automatically and corrects, its error is corrected as follows:
Step I, current read are imported by verification tensimeter sequence number: import current read by the manometric sequence number i# of verification through parameter set unit;
Step II, measuring error data set obtain: said image processing equipment is according to the tensimeter model of being imported in the step 2; And call the model matching module; Judge whether exist in the measuring error database of setting up in advance with step 2 in the corresponding measuring error data set of institute's input pressure table model: if exist, then get into the step VI; Otherwise, get into the step III;
Step III, measuring error data set obtain, and its acquisition process is following:
Step ⅰ, the adjustment of pipe internal pressure:, the pipe internal pressure of horizontal checkout pipe 4 is adjusted through said regulator;
Step ⅱ, pressure gauge reading obtain: according to step 2 to the method described in the step 6, obtain under the current state m said by the manometric reading of verification;
Step ⅲ, measuring error are asked for: the people is said by the manometric reading of verification for reading under the current state m; Again to m said by the manometric people of verification for read obtained reading among reading and the step ⅱ and do respectively to differ from after, m is individual said by the manometric measuring error of verification under the just corresponding acquisition current state;
Step ⅳ, repeatedly repeating step ⅰ is to step ⅲ, obtain m said by the manometric repeatedly measuring error of verification;
And repeatedly repeating step ⅰ is to step ⅲ process, and the pipe internal pressure of adjustment back horizontal checkout pipe is all inequality among the step ⅰ;
Step ⅴ, measuring error data set obtain: to m among the step ⅳ is said averaged respectively by the manometric repeatedly measuring error of verification after, just obtain with step 2 in the corresponding measuring error data set of institute's input pressure table model; Simultaneously, with obtained with step 2 in the corresponding measuring error data set of institute's input pressure table model, be added in the said measuring error database;
Step VI, gauge measurement error information are obtained: said image processing equipment is according to the sequence number i# that is imported in the step I; From with step 2 in the corresponding measuring error data set of institute's input pressure table model, find out sequence number and be i# by the manometric measuring error data of verification Δ c
i
Step V, reading are proofreaied and correct: according to formula c '=c+ Δ c
i, calculating and proofread and correct the current read in back by the manometric reading c' of verification, c is current being read by the manometric reading of verification, Δ c of extrapolating automatically in the step 603 in the formula
iFor sequence number in the step II be i# by the manometric measuring error data of verification.
The present invention compared with prior art has the following advantages:
1, the batch check system that is adopted is simple in structure, installation is laid convenient and input cost is lower.
2, use is easy and simple to handle, and pressure is easy to adjust.
3, the batch method of calibration step that is adopted is simple, realization is convenient and verification speed is fast in batches.
4, adopt the binocular tri-dimensional vision system to carry out verification, calibration accuracy is high.Simultaneously, correct, further guaranteed calibration accuracy through reading that image processing equipment obtains being carried out error
5, result of use is good; After binocular stereo vision obtains pressure gauge reading, can accomplish error analysis synchronously, realize the automatic Verification of pointer instrument; Acquisition is higher than manual calibrating accuracy, reaches purpose such as raise the efficiency, reduce personnel attrition, reduce cost.
6, widely applicable, can effectively promote being suitable for to the batch verification process of all pointer instruments.
7, economic benefit and obvious social benefit, 200,000 of year increase calibrating amounts are estimated in the calibrating speed and the accuracy that improve pointer pressure greatly; 6,000,000 yuan of direct economic benefits can improve manometric all inspection rates in the field produces operational outfit greatly, for the accuracy rate that improves transmission of quantity value; The running status of stabilizing equipment; In time find operating labile factor, have stronger directive function, social benefit is obvious.
In sum, the present invention is reasonable in design, use is easy and simple to handle and result of use is good, has increased substantially the calibrating efficient and calibrating accuracy of pointer pressure.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Fig. 1 by the present invention the employing user mode reference diagram of calibration equipment in batches.
Fig. 2 by the present invention the employing schematic block circuit diagram of calibration equipment in batches.
Fig. 3 by the present invention the employing FB(flow block) of method of calibration in batches.
Fig. 4 looks squarely the binocular solid imaging schematic diagram for the binocular tri-dimensional vision system.
Description of reference numerals:
1-horizontal check platform; 2-by the verification tensimeter; 3-rapid-acting coupling;
4-horizontal checkout pipe; 5-image capture device; 6-image processing equipment;
7-1-hydraulic reservoir; 7-2-hydraulic pump; 7-3-hydraulic control valve;
7-4-fluid pressure line; 8-pressure regulation handwheel; 10-1-vertical support bar;
10-2-horizontal seat; 11-baffle plate; 12-parameter set unit;
13-data storage cell.
Embodiment
Like Fig. 1, a kind of intelligent pointer pressure shown in Figure 2 calibration equipment in batches; The pressue device that comprises horizontal check platform 1, is installed on horizontal checkout pipe 4 on the horizontal check platform 1, supplies a plurality of a plurality of rapid-acting couplings 3 of being installed by verification tensimeter 2 respectively, is positioned at horizontal check platform 1 the place ahead and the image processing equipment 6 that joins to a plurality of said two image capture devices 5 that absorbed by the dial plate image of verification tensimeter 2, with two said image capture devices 5, horizontal checkout pipe 4 is pressurizeed and through controlling the regulator that said pressue device adjusts accordingly the pipe internal pressure of horizontal checkout pipe 4; Said pressue device joins through connecting tube and horizontal checkout pipe 4, and said pressue device and said regulator join.A plurality of said identical with the quantity of a plurality of said rapid-acting couplings 3 by the quantity of verification tensimeter 2.The structure of a plurality of said rapid-acting couplings 3 all identical with size and its all be laid in same horizontal linear l
1On, a plurality of said rapid-acting couplings 3 are installed on the horizontal checkout pipe 4.Two said image capture devices 5 all are laid in same horizontal linear l
2On, horizontal linear l wherein
2With horizontal linear l
1Parallel and the spacing between the two is more than the 1m.A plurality of said rapid-acting couplings 3 all are vertically to laying, and the spacing between adjacent two the said rapid-acting couplings 3 in the left and right sides is 10cm～50cm, and the spacing between two said image capture devices 5 is 40cm～80cm; A plurality ofly saidly be the tensimeter of same model, and a plurality ofly saidly be even laying by verification tensimeter 2 by verification tensimeter 2.
During actual the connection, end sealing and its other end of said horizontal checkout pipe 4 join through said connecting tube and said pressue device.
During actual the laying, a plurality of saidly be laid on the same perpendicular by verification tensimeter 2, and two said image capture devices 5 are laid on the same perpendicular.Said horizontal linear l
2With horizontal linear l
1Between spacing be 1m～2m.
In the present embodiment, said horizontal linear l
2With horizontal linear l
1Between spacing be 1.5m.During actual verification, can be according to concrete needs, to said horizontal linear l
2With horizontal linear l
1Between spacing adjust accordingly.
In the present embodiment, two said image capture devices 5 are the DV of same model or the digital camera of same model, and the focal length of the two camera lens that adopts is identical.
In the present embodiment, said horizontal check platform 1 the place ahead is provided with two mount pads that supply two said image capture devices 5 to install respectively, and said mount pad comprises vertical support bar 10-1 and is installed in the horizontal seat 10-2 on the vertical support bar 10-1.
Simultaneously, said horizontal check platform 1 is provided with the wall that exterior color is a single color.In the present embodiment, said wall is one and is vertical to the baffle plate of laying 11, and the color of said wall is beneficial to distinguish with bigger by the color distortion of verification tensimeter 2 outer edge line.
In the present embodiment, said pressue device is a hydraulic system, and said connecting tube is fluid pressure line 7-4.During actual the use, in horizontal checkout pipe 4, pressurize, and saidly simultaneously the fluid pressures in the horizontal checkout pipe 4 are measured by verification tensimeter 2 through a plurality of through said hydraulic system.And, the fluid pressure in the horizontal checkout pipe 4 is adjusted through said regulator.
During actual the use, also can adopt baric systerm to pressurizeing in the horizontal checkout pipe 4, this moment a plurality of saidly simultaneously gaseous tensions in the horizontal checkout pipe 4 are measured by verification tensimeter 2.
The hydraulic control valve 7-3 that said hydraulic system comprises the hydraulic reservoir 7-1 that joins with fluid pressure line 7-4, be installed in the hydraulic pump 7-2 on the fluid pressure line 7-4 and be installed in that fluid pressure line 7-4 goes up and the fluid pressure in the fluid pressure line 7-4 is adjusted; Said hydraulic control valve 7-3 is hand valve or motorized valve, and said regulator should be pressure regulation handwheel 8 that is installed on the said hand valve or the voltage regulator controllers that joins with said motorized valve mutually.
In the present embodiment, said hydraulic control valve 7-3 is a hand valve, and said regulator is the pressure regulation handwheel 8 that is installed on the said hand valve.During actual installation, said hydraulic reservoir 7-1 and hydraulic pump 7-2 are installed in the said horizontal check platform 1, and said hand valve is installed on the said horizontal check platform 1.
During actual installation, the spacing between adjacent two the said rapid-acting couplings 3 in the left and right sides is 20cm ± 5cm, and the spacing between two said image capture devices 5 is 50cm ± 5cm.
In the present embodiment, the spacing between adjacent two the said rapid-acting couplings 3 in the left and right sides is 20cm, and the spacing between two said image capture devices 5 is 50cm.In the actual use, can be according to concrete needs, the spacing between the spacing between adjacent two the said rapid-acting couplings 3 in the left and right sides and two the said image capture devices 5 is adjusted accordingly.
A kind of pointer pressure as shown in Figure 3 is method of calibration in batches, may further comprise the steps:
Preliminary work before the step 1, verification: saidly be installed on respectively in a plurality of said rapid-acting couplings 3 a plurality of earlier, restart said pressue device, and the pipe internal pressure of horizontal checkout pipe 4 is adjusted to the required pressure of verification through said regulator by verification tensimeter 2; A plurality of said rapid-acting couplings 3 are m with a plurality of said quantity by verification tensimeter 2.
The pipe internal pressure of horizontal checkout pipe 4 is adjusted to the required pressure of verification, and each is said by after the stable reading of verification tensimeter 2, gets into step 2 again.
During actual the use, a plurality of said rapid-acting couplings 3 are 4～10 with a plurality of said quantity by verification tensimeter 2.
In the present embodiment, m=6.That is to say said rapid-acting coupling 3 and be 6 by the quantity of verification tensimeter 2.In the actual use, also can be according to concrete needs, the value of m is adjusted accordingly.
In the actual mechanical process, also need m said rapid-acting coupling 3 is numbered, and m the said rapid-acting coupling 3 in numbering back is respectively 1# joint, 2# joint, 3# joint, 4# joint, 5# joint and 6# joint from left to right.6 said titles by verification tensimeter 2 of being installed in 6 said rapid-acting coupling 3 accordingly, are respectively 1# tensimeter, 2# tensimeter, 3# tensimeter, 4# tensimeter, 5# tensimeter and 6# tensimeter.
Said dial plate template database internal memory is stored in the data storage cell 13 that joins with image processing equipment 6, and has the dial plate template data of a plurality of different model pointer pressures in the said dial plate template database.The dial plate template data of each model pointer pressure includes respectively and two said image capture device 5 corresponding two groups of template datas; And each group template data includes m dial plate image information that is installed on m this model pointer pressure in the said rapid-acting coupling 3 respectively, and said dial plate image information comprises the pixel location data of dial plate central point, scale mark reference position and scale mark final position.
Wherein, the dial plate central point is by the central point of pointer institute fixed rotating shaft in the verification tensimeter 2.
Step 301, dial plate IMAQ and synchronous transmission: adopt two said image capture devices 5 and according to identical magnification ratio; Respectively m in the step 1 said dial plate image by verification tensimeter 2 gathered; And with institute's images acquired synchronous driving to image processing equipment 6, the identical pending image of corresponding acquisition two width of cloth sizes; In two said pending images, all comprise a plurality of said by the dial plate image of verification tensimeter 2.
In the present embodiment, two said image capture devices 5 are respectively image capture device one and the image capture device two that is positioned at said image capture device one right side.
In the actual use, two said image processing equipments 6 are with two said pending images, in stores synchronized to the data storage cell 13.And two said pending images carry out related through associative cell with image capture device title (being said image capture device one or image capture device two) respectively.
Step 302, dial plate image segmentation: said image processing equipment 6 calls the image segmentation module, respectively two said pending images in the step 2 cut apart, and two groups of single dial plate images after obtaining to cut apart; Include m single dial plate image in two groups of said single dial plate images, and m said single dial plate image be respectively in the step 1 m said by the dial plate image of verification tensimeter 2.
In the present embodiment, two groups of single dial plate images carry out related through associative cell with the image capture device title of two said image capture devices 5 respectively.And; Since m single dial plate image in every group of said single dial plate image be respectively in the step 1 m said by the dial plate image of verification tensimeter 2; Thereby m single dial plate image in every group of said single dial plate image, will saidly be undertaken related with m through associative cell respectively by the title of verification tensimeter 2.
Step 303, dial plate image information acquisition: said image processing equipment 6 obtains the dial plate image information of each single dial plate image in two groups of said single dial plate images respectively, just the corresponding dial plate template data of institute's input pressure table model in acquisition and the step 2; Wherein, the dial plate image information of every single dial plate image includes the pixel location data of dial plate central point, scale mark reference position and scale mark final position in this single dial plate image; Simultaneously, said image processing equipment 6 calls the straight-line detection module, detects in two groups of said single dial plate images the equation of pointer place straight line in each single dial plate image respectively.
In the present embodiment, the dial plate image information of each single dial plate image is all carried out related through associative cell with pairing image capture device title and tensimeter title in two groups of said single dial plate images.
Step 304, dial plate template data are added: with obtained in the step 303 with step 2 in the corresponding dial plate template data of institute's input pressure table model, be added in the said dial plate template database; Afterwards, get into step 6.
Step 601, pending dial plate image information acquisition: said image processing equipment 6 is transferred out current read respectively by two single dial plate images of verification tensimeter 2 in said pending information.
Step 602, binocular stereo vision images match: said image processing equipment 6 calls binocular stereo vision images match module; Information to be matched to transferring two single dial plate images in the step 601 is handled, and the dial plate image information after the corresponding acquisition coupling; The equation of pointer place straight line in the dial plate image information that said information to be matched is two said single dial plate images and two the single dial plate images, and the dial plate image information after the coupling is that the current read that obtains after the coupling is belonged to straight line l by the pixel location data of the dial plate central point of verification tensimeter 2, scale mark reference position and scale mark final position and pointer
5Equation.
Step 603, data processing: said image processing equipment 6 is according to the dial plate image information after mating in the step 602, and combination is by the range Δ c of verification tensimeter 2 and measurement lower limit value c
0, extrapolate current read automatically by the reading of verification tensimeter 2.
In the present embodiment; When in the step 603 current read being calculated by the reading of verification tensimeter 2 automatically; Said image processing equipment 6 is extrapolated dial plate central point and scale mark reference position place straight line l earlier according to the pixel location data of dial plate central point, scale mark reference position and scale mark final position in the coupling back dial plate image information in the step 602
3Equation and dial plate central point and scale mark final position place straight line l
4Equation; Afterwards, again according to straight line l
3With straight line l
4Equation extrapolate straight line l
3With straight line l
4Between included angle A, and according to straight line l
3With pointer place straight line l
5Equation, extrapolate straight line l
3With straight line l
5Between included angle B; Then, according to formula
Calculate current read by the reading c of verification tensimeter 2.
In the present embodiment, also need in advance the internal and external parameter of two said image capture devices 5 to be demarcated respectively, and obtain to demarcate the inside and outside parameter of latter two said image capture device 5.Simultaneously, also need in advance through the spacing between two said image capture devices 5 of parameter set unit 12 inputs (specifically be the distance of line of the projection centre of two said image capture devices 5, promptly the baseline distance is b).
Because after the demarcation of binocular tri-dimensional vision system is meant that mainly the inner parameter (like focal length) of video camera is demarcated, the structural parameters R that confirms vision system and T (promptly the position between two video cameras concerns that R and T are respectively rotation matrix and translation vector).Conventional method is the 2D or the 3D precision target drone of employing standard, tries to achieve above-mentioned parameter through the corresponding relation of camera review coordinate and three-dimensional world coordinate.In the present embodiment, adopt the 2D or the 3D precision target drone of standard, and, try to achieve the internal and external parameter of image capture device 5 through the image coordinate of image capture device 5 and the corresponding relation of three-dimensional world coordinate.
In the step 602, actual when carrying out the binocular stereo vision images match, in conjunction with the spacing between the inside and outside parameter of demarcating latter two said image capture device 5 and two the said image capture devices 5, carry out matching treatment.
In addition; Actual when carrying out the binocular stereo vision images match in the step 602; Shooting angle when said image processing equipment 6 is gathered by the dial plate image of verification tensimeter 2 according to 6 pairs of current reads of two image processing equipments of being transferred in the step 601, and call binocular stereo vision images match module and carry out the binocular stereo vision images match.
Wherein, the binocular stereo vision measurement is based on principle of parallax, is obtained the method for object dimensional geological information by multiple image.In computer vision system; Binocular stereo vision is measured and is generally obtained two width of cloth images of scenery on every side by twin camera simultaneously from different angles; Or there is single camera to obtain two width of cloth digital pictures of scenery on every side constantly from different perspectives in difference; And can recover the 3-D geometric model of object, the 3D shape and the position of scenery around rebuilding based on principle of parallax.
In many application that binocular stereo vision is measured, can be in the object under test surface distributed some have obvious characteristic and the element that is easy to discern serves as a mark a little, like circle, cross portrayal line etc.If load unique identity information to gauge point, promptly gauge point is encoded, gauge point in the image is carried out unique identification after, can make things convenient for, realize the correspondence coupling of gauge point between multiple image reliably.
Thereby; Image processing equipment 6 calls the process that binocular stereo vision images match module is handled said information to be matched in this step, is the process of the straight line at pointer place in the dial plate image information of two said single dial plate images and two the single dial plate images being carried out three-dimensional coupling respectively.
Actual carrying out solid when coupling is because three-dimensional coupling is that (like left order image and right order image) found out the characteristic of correspondence point from two width of cloth images of stereo-picture.And be to guarantee to obtain unique point accurately, the outer limit that requires two width of cloth stereo-pictures is on same sweep trace.Yet in the real work, always there are some errors in the configuration of two image capture devices that adopt, even the parallel vertical projection pattern can not guarantee that outer polar curve is a level, thereby the parallax search is complicated when causing three-dimensional coupling.Thereby, before the solid coupling, need the outer polar curve of stereoscopic image to carry out rectification, make three-dimensional coupling can reach a level preferably.
To sum up, use the binocular tri-dimensional vision system can confirm the three-D profile of arbitrary objects, and can obtain the three-dimensional coordinate of arbitrfary point on the profile.
In the present embodiment, said binocular stereo vision images match module adopts the image processing software HALCON of German MVtec company.HALCON is worldwide widely used machine vision software.HALCON also comprises outstanding advanced algorithms such as Blob analysis, morphology, pattern-recognition, measurement, three-dimensional camera calibration, binocular stereo vision.HALCON supports Linux and Windows, and can pass through C, C++, C#, Visual Basic and the visit of Delphi language.HALCON and hardware independent are supported most of image pick-up cards and are had DirectShow and the collecting device of IEEE 1394 drivings in addition, and the user can utilize its Open architecture to develop Flame Image Process and machine vision applications software fast.
In the present embodiment, in conjunction with Fig. 4, the distance of the line of the projection centre of two video cameras (or camera), promptly the baseline distance is b.The initial point of camera coordinate system is at the photocentre place of camera lens; In fact the imaging plane of video camera is behind the photocentre of camera lens; Among Fig. 4 left and right sides imaging plane is plotted in f place before the photocentre of camera lens; The u axle of the plane of delineation coordinate system that this is virtual is consistent with the x axle and the y direction of principal axis of camera coordinate system with the v axle, can simplify computation process like this.About the initial point of two width of cloth images (two single dial plate images for example, being transferred in the step 601 in the present embodiment) coordinate system at the intersection point O 1 and the O2 on camera optical axis and plane.In the space certain some P corresponding coordinate in left image and right image be respectively P1 (u1, v1) and P2 (u2, v2).The image of supposing two video cameras on same plane, then put P about Y coordinate in two width of cloth image coordinate systems identical, i.e. v1=v2.Obtain by the triangle geometric relationship:
(x in the formula
c, y
c, z
c) being the three dimensional space coordinate of some P in left camera coordinate system, b is the baseline distance, and f is two focus of camera, and (u1 v1) is respectively the coordinate (being pixel location data) of a P in left image and right image with (u2, v 2).
Parallax be defined as certain a bit about the alternate position spike of respective point in two width of cloth images:
Can calculate in the space coordinate of certain some P in left camera coordinate system thus is:
Therefore, if can find in the space certain point about respective point on two video camera image planes, and obtain the inside and outside parameter of video camera through camera calibration, just can confirm the three-dimensional coordinate of this point.That is to say,, just can ask for three dimensional space coordinate by the binocular stereo vision measuring principle through the image coordinate of respective point in two images about trying to achieve.
In the present embodiment; Said image processing equipment 6 calls binocular stereo vision images match module; When the information to be matched of transferring two single dial plate images in the step 601 is handled the dial plate image information after also corresponding acquisition is mated, specifically be to ask for current read by the three dimensional space coordinate of any two points on the dial plate central point of verification tensimeter 2, scale mark reference position (specifically being the mid point of start index line in the dial scale line), scale mark final position (specifically being the mid point that stops scale mark in the dial scale line) and the pointer.
In the present embodiment, owing to current read all is on the same perpendicular by dial plate central point, scale mark reference position, scale mark final position and pointer in the verification tensimeter 2, thereby the straight line l at dial plate central point and scale mark reference position place
3, dial plate central point and scale mark final position place straight line l
4, pointer place straight line l
5All be on the same perpendicular, the y axial coordinate of any two points is all identical on dial plate central point, scale mark reference position, scale mark final position and the pointer.Therefore, according to the three dimensional space coordinate of any two points on the dial plate central point of being obtained, scale mark reference position, scale mark final position and the pointer, just can directly solve straight line l
3, straight line l
4With straight line l
5Equation, and the corresponding straight line l that extrapolates
3With straight line l
4Between included angle A and straight line l
3With straight line l
5Between included angle B, again according to formula
Calculate current read by the reading c of verification tensimeter 2.
In addition; Because the binocular tri-dimensional vision system must be installed on the stabilised platform; When carrying out the binocular vision system demarcation and using this system measuring; Intrinsic parameter (such as focal length) and two video camera relative position relations of guaranteeing video camera can not change, if any one changes, then need again the binocular tri-dimensional vision system to be demarcated.In the present embodiment, the stationkeeping of two said image capture devices 5 is motionless.
The installation method of binocular tri-dimensional vision system influences the precision of measurement result.The precision of measuring can be drawn by following formula: the precision of distance between measured point that
Shi Zhong ⊿ z representes to measure and the stereo visual system; Z refers to the absolute distance of measured point and stereo visual system; F refers to focus of camera; B representes the baseline distance of binocular tri-dimensional vision system, and ⊿ d representes measured point parallax precision.In order to obtain higher precision, focus of camera and base length are increased, should make testee as much as possible near stereo visual system simultaneously.In addition, the precision of this precision and parallax has direct relation.No matter under any circumstance, guarantee stereo-picture between enough big and two video cameras in crossover zone should approximately align, that is to say that the angle that each camera intrinsic optical axis rotates can not be too big.
In the present embodiment, the straight-line detection module described in step 303 and the step 4 is the Hough conversion module.In the actual use, also can adopt the line detection method of other type.
In the present embodiment, the image segmentation module described in the step 302 is that histogram thresholding is cut apart module.During actual the use, also can adopt the image segmentation module of other type.
In the present embodiment, a plurality of saidly all be on the same surface level by verification tensimeter 2 and two said image capture devices 5.That is to say, adopt the flat mode of taking the photograph.
Actual when carrying out IMAQ, the shooting angle of said image capture device 5 comprises shooting height, takes direction and shooting distance.Shooting height is divided into flat three kinds of the bats of clapping, take a crane shot and face upward.Take direction and be divided into positive angle, side angle, oblique side angle degree, back side angle etc.Shooting distance is one of other element of decision scape.Actual employing is flat claps (or claiming flat taking the photograph), and when mode was carried out IMAQ, used photography (elephant) machine and subject were in same horizontal a kind of shooting angle.Flat taking the photograph generally can be divided into three kinds on front, side and inclined-plane.In the present embodiment, adopt the flat mode of taking the photograph.That is to say a plurality of saidly be on the same surface level by verification tensimeter 2 and two said image capture devices 5.
In the present embodiment, carry out in the step 1 need number m said rapid-acting coupling 3 earlier, and m said rapid-acting coupling 3 being respectively 1# joint, 2# joint, 3# joint from left to right after the numbering before the preceding preliminary work of verification ... The m# joint; M the said sequence number by verification tensimeter 2 of being installed in the individual said rapid-acting coupling 3 of m accordingly, is respectively 1#, 2#, 3# ... M#;
Current read is i# by the sequence number of verification tensimeter 2 in the step 601, wherein i=1,2,3 ... M.
Automatically extrapolate in the step 603 current read by the manometric reading of verification after, said image processing equipment 6 also needs to carry out error to the reading of extrapolating automatically and corrects, its error is corrected as follows:
Step I, current read are imported by verification tensimeter sequence number: import current read by the manometric sequence number i# of verification through parameter set unit 12;
Step II, measuring error data set obtain: said image processing equipment 6 is according to the tensimeter model of being imported in the step 2; And call the model matching module; Judge whether exist in the measuring error database of setting up in advance with step 2 in the corresponding measuring error data set of institute's input pressure table model: if exist, then get into the step VI; Otherwise, get into the step III;
Step III, measuring error data set obtain, and its acquisition process is following:
Step ⅰ, the adjustment of pipe internal pressure:, the pipe internal pressure of horizontal checkout pipe 4 is adjusted through said regulator;
Step ⅱ, pressure gauge reading obtain: according to step 2 to the method described in the step 6, obtain under the current state m said by the reading of verification tensimeter 2;
Step ⅲ, measuring error are asked for: the people be read under the current state m said by the reading of verification tensimeter 2; Again to m said by the people of verification tensimeter 2 for read obtained reading among reading and the step ⅱ and do respectively to differ from after, m is individual said by the measuring error of verification tensimeter 2 under the just corresponding acquisition current state;
Wherein, each is by the measuring error of verification tensimeter 2, and being this manometric people is to read the difference between the reading of obtaining among reading and the step ⅱ;
Step ⅳ, repeatedly repeating step ⅰ is to step ⅲ, obtain m said by the repeatedly measuring error of verification tensimeter 2;
And repeatedly repeating step ⅰ is to step ⅲ process, and the pipe internal pressure of adjustment back horizontal checkout pipe 4 is all inequality among the step ⅰ;
Step ⅴ, measuring error data set obtain: after the said repeatedly measuring error by verification tensimeter 2 of m among the step ⅳ is averaged respectively, just obtain with step 2 in the corresponding measuring error data set of institute's input pressure table model; Simultaneously, with obtained with step 2 in the corresponding measuring error data set of institute's input pressure table model, be added in the said measuring error database;
That is to say; Each is by the mean value of more than 2 measuring error of verification tensimeter among the step ⅳ; Just be these manometric measuring error data, and m said by the corresponding measuring error data set of institute's input pressure table model in the measuring error data of verification tensimeter 2 composition and the step 2;
Step VI, gauge measurement error information are obtained: said image processing equipment 6 is according to the sequence number i# that is imported in the step I; From with step 2 in the corresponding measuring error data set of institute's input pressure table model, find out sequence number and be i# by the measuring error data Δ c of verification tensimeter 2
i
Step V, reading are proofreaied and correct: according to formula c '=c+ Δ c
i, calculating and proofread and correct the current read in back by the manometric reading c' of verification, c is current being read by the manometric reading of verification, Δ c of extrapolating automatically in the step 603 in the formula
iFor sequence number in the step II be i# by the measuring error data of verification tensimeter 2.
In the present embodiment, said measuring error database storing is in data storage cell 13.
During actual the use, m by the measuring error data Δ c of verification tensimeter 2
iAll inequality, as long as reason is the different apart from all with shooting distance by the shooting direction of verification tensimeter 2 to each of two said image capture devices 5.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any restriction, every technical spirit changes any simple modification, change and the equivalent structure that above embodiment did according to the present invention, all still belongs in the protection domain of technical scheme of the present invention.
Claims (10)
1. intelligent pointer pressure calibration equipment in batches; It is characterized in that: the pressue device that comprises horizontal check platform (1), is installed on horizontal checkout pipe (4) on the horizontal check platform (1), supplies a plurality of a plurality of rapid-acting couplings (3) of being installed by verification tensimeter (2) respectively, is positioned at horizontal check platform (1) the place ahead and the image processing equipment (6) that joins to a plurality of said two image capture devices (5) that absorbed by the dial plate image of verification tensimeter (2), with two said image capture devices (5), horizontal checkout pipe (4) is pressurizeed and through controlling the regulator that said pressue device adjusts accordingly the pipe internal pressure of horizontal checkout pipe (4); Said pressue device joins through connecting tube and horizontal checkout pipe (4), and said pressue device and said regulator join; A plurality of said identical with the quantity of a plurality of said rapid-acting couplings (3) by the quantity of verification tensimeter (2); The structure of a plurality of said rapid-acting couplings (3) all identical with size and its all be laid in same horizontal linear l
1On, a plurality of said rapid-acting couplings (3) are installed on the horizontal checkout pipe (4); Two said image capture devices (5) all are laid in same horizontal linear l
2On, horizontal linear l wherein
2With horizontal linear l
1Parallel and the spacing between the two is more than the 1m; A plurality of said rapid-acting couplings (3) all are vertically to laying, and the spacing between adjacent two the said rapid-acting couplings in the left and right sides (3) is 10cm～50cm, and the spacing between two said image capture devices (5) is 40cm～80cm; A plurality ofly saidly be the tensimeter of same model, and a plurality ofly saidly be even laying by verification tensimeter (2) by verification tensimeter (2).
2. according to the described intelligent pointer pressure batch calibration equipment of claim 1, it is characterized in that: said horizontal linear l
2With horizontal linear l
1Between spacing be 1m～2m.
3. according to claim 1 or 2 described intelligent pointer pressures batch methods of calibration and batch calibration equipments, it is characterized in that: two said image capture devices (5) are the digital camera of the DV of same model or same model.
4. according to claim 1 or 2 described intelligent pointer pressures methods of calibration and calibration equipments in batches in batches, it is characterized in that: a plurality of saidly all be on the same surface level by verification tensimeter (2) and two said image capture devices (5); Said horizontal check platform (1) the place ahead is provided with two mount pads that supply two said image capture devices (5) to install respectively.
5. according to claim 1 or 2 described intelligent pointer pressures batch methods of calibration and batch calibration equipments, it is characterized in that: said horizontal check platform (1) is provided with the wall that exterior color is a single color.
6. according to claim 1 or 2 described intelligent pointer pressures batch methods of calibration and batch calibration equipments, it is characterized in that: said pressue device is a hydraulic system, and said connecting tube is fluid pressure line (7-4); Said hydraulic system comprises the hydraulic reservoir (7-1) that joins with fluid pressure line (6), be installed in the hydraulic pump (7-2) on the fluid pressure line (7-4) and the hydraulic control valve (7-3) that is installed in that fluid pressure line (7-4) is gone up and the interior fluid pressure of fluid pressure line (7-4) is adjusted; Said hydraulic control valve (7-3) is hand valve or motorized valve, and said regulator should be pressure regulation handwheel (8) that is installed on the said hand valve or the voltage regulator controllers that joins with said motorized valve mutually.
7. a utilization is installed according to claim 1 pointer pressure is carried out the method for verification in batches, it is characterized in that this method may further comprise the steps:
Preliminary work before the step 1, verification: saidly be installed on respectively in a plurality of said rapid-acting couplings (3) a plurality of earlier by verification tensimeter (2); Restart said pressue device, and the pipe internal pressure of horizontal checkout pipe (4) is adjusted to the required pressure of verification through said regulator; A plurality of said rapid-acting couplings (3) and a plurality of said quantity by verification tensimeter (2) are m;
Step 2, by verification tensimeter model input and model coupling: the parameter set unit (12) through joining with image processing equipment (6) earlier, a plurality of said in the input step one by the model of verification tensimeter (2); Afterwards; Said image processing equipment (6) is according to the tensimeter model of being imported; And call the model matching module and judge in the dial plate template database of setting up in advance whether have the manometric dial plate template data of this model: when in judgement draws said dial plate template database, having the manometric dial plate template data of this model, get into step 4; Otherwise, get into step 3;
Said dial plate template database internal memory is stored in the data storage cell (13) that joins with image processing equipment (6), and has the dial plate template data of a plurality of different model pointer pressures in the said dial plate template database; The dial plate template data of each model pointer pressure includes respectively and the corresponding two groups of template datas of two said image capture devices (5); And each group template data includes m dial plate image information that is installed on m this model pointer pressure in the said rapid-acting coupling (3) respectively, and said dial plate image information comprises the pixel location data of dial plate central point, scale mark reference position and scale mark final position;
Step 3, dial plate template data obtain, and its acquisition process is following:
Step 301, dial plate IMAQ and synchronous transmission: adopt two said image capture devices (5) and according to identical magnification ratio; Respectively m in the step 1 said dial plate image by verification tensimeter (2) gathered; And with institute's images acquired synchronous driving to image processing equipment (6), the identical pending image of corresponding acquisition two width of cloth sizes; In two said pending images, all comprise a plurality of said by the dial plate image of verification tensimeter (2);
Step 302, dial plate image segmentation: said image processing equipment (6) calls the image segmentation module, respectively two said pending images in the step 2 cut apart, and two groups of single dial plate images after obtaining to cut apart; Include m single dial plate image in two groups of said single dial plate images, and m said single dial plate image be respectively in the step 1 m said by the dial plate image of verification tensimeter (2);
Step 303, dial plate image information acquisition: said image processing equipment (6) obtains the dial plate image information of each single dial plate image in two groups of said single dial plate images respectively, just the corresponding dial plate template data of institute's input pressure table model in acquisition and the step 2; Wherein, the dial plate image information of every single dial plate image includes the pixel location data of dial plate central point, scale mark reference position and scale mark final position in this single dial plate image; Simultaneously, said image processing equipment (6) calls the straight-line detection module, detects in two groups of said single dial plate images the equation of pointer place straight line in each single dial plate image respectively;
Step 304, dial plate template data are added: with obtained in the step 303 with step 2 in the corresponding dial plate template data of institute's input pressure table model, be added in the said dial plate template database; Afterwards, get into step 6;
Step 4, dial plate IMAQ, cut apart and pointer place straight-line detection: earlier according to step 301 to the method described in the step 302, two groups of single dial plate images after obtaining to cut apart; Afterwards, said image processing equipment (6) calls the straight-line detection module, detects in two groups of said single dial plate images the equation of pointer place straight line in each single dial plate image respectively; Subsequently, get into step 5;
Step 5, template matches: said image processing equipment (6) transfer earlier with step 2 in the corresponding dial plate template data of institute's input pressure table model, call the dial plate image information that template matches module coupling draws in the step 4 each single dial plate image in two groups of said single dial plate images again; Afterwards, get into step 6;
Step 6, pressure gauge reading obtain: said image processing equipment (6) is treated process information and is carried out analyzing and processing; And m is individual said by the reading of verification tensimeter (2) in the corresponding obtaining step one, and each is all identical by the reading acquisition process of verification tensimeter (2); Said pending information be obtain in the step 303 or step 5 in the equation of pointer place straight line in dial plate image information and each single dial plate image of each single dial plate image in two groups of said single dial plate images drawing of coupling; By verification tensimeter (2), its reading acquisition process is following for any:
Step 601, pending dial plate image information acquisition: said image processing equipment (6) is transferred out current read respectively by two single dial plate images of verification tensimeter (2) in said pending information;
Step 602, binocular stereo vision images match: said image processing equipment (6) calls binocular stereo vision images match module; Information to be matched to transferring two single dial plate images in the step 601 is handled, and the dial plate image information after the corresponding acquisition coupling; The equation of pointer place straight line in the dial plate image information that said information to be matched is two said single dial plate images and two the single dial plate images, and the dial plate image information after the coupling is that the current read that obtains after the coupling is belonged to straight line l by the pixel location data of the dial plate central point of verification tensimeter (2), scale mark reference position and scale mark final position and pointer
5Equation;
Step 603, data processing: said image processing equipment (6) is according to the dial plate image information after mating in the step 602, and combination is by the range Δ c of verification tensimeter (2) and measurement lower limit value c
0, extrapolate current read automatically by the reading of verification tensimeter (2).
8. according to the described method of claim 7, it is characterized in that: the image segmentation module described in the step 302 is that histogram thresholding is cut apart module; Straight-line detection module described in step 303 and the step 4 is the Hough conversion module.
9. according to claim 7 or 8 described methods; It is characterized in that: when in the step 603 current read being calculated by the reading of verification tensimeter (2) automatically; Said image processing equipment (6) is extrapolated dial plate central point and scale mark reference position place straight line l earlier according to the pixel location data of dial plate central point, scale mark reference position and scale mark final position in the coupling back dial plate image information in the step 602
3Equation and dial plate central point and scale mark final position place straight line l
4Equation; Afterwards, again according to straight line l
3With straight line l
4Equation extrapolate straight line l
3With straight line l
4Between included angle A, and according to straight line l
3With pointer place straight line l
5Equation, extrapolate straight line l
3With straight line l
5Between included angle B; Then, according to formula
Calculate current read by the reading c of verification tensimeter (2).
10. according to claim 7 or 8 described methods; It is characterized in that: carry out in the step 1 before the preceding preliminary work of verification; Need earlier m said rapid-acting coupling (3) to be numbered, and m the said rapid-acting coupling (3) in numbering back is respectively 1# joint, 2# joint, 3# joint from left to right ... The m# joint; M the said sequence number by verification tensimeter (2) of being installed in the individual said rapid-acting coupling (3) of m accordingly, is respectively 1#, 2#, 3# ... M#;
Current read is i# by the sequence number of verification tensimeter (2) in the step 601, wherein i=1,2,3 ... M;
Automatically extrapolate in the step 603 current read by the manometric reading of verification after, said image processing equipment (6) also needs to carry out error to the reading of extrapolating automatically and corrects, its error is corrected as follows:
Step I, current read are imported by verification tensimeter sequence number: import current read by the manometric sequence number i# of verification through parameter set unit (12);
Step II, measuring error data set obtain: said image processing equipment (6) is according to the tensimeter model of being imported in the step 2; And call the model matching module; Judge whether exist in the measuring error database of setting up in advance with step 2 in the corresponding measuring error data set of institute's input pressure table model: if exist, then get into the step VI; Otherwise, get into the step III;
Step III, measuring error data set obtain, and its acquisition process is following:
Step ⅰ, the adjustment of pipe internal pressure:, the pipe internal pressure of horizontal checkout pipe 4 is adjusted through said regulator;
Step ⅱ, pressure gauge reading obtain: according to step 2 to the method described in the step 6, obtain under the current state m said by the reading of verification tensimeter (2);
Step ⅲ, measuring error are asked for: the people is said by the reading of verification tensimeter (2) for reading under the current state m; Again to m said by the people of verification tensimeter (2) for read obtained reading among reading and the step ⅱ and do respectively to differ from after, m is individual said by the measuring error of verification tensimeter (2) under the just corresponding acquisition current state;
Step ⅳ, repeatedly repeating step ⅰ is to step ⅲ, obtain m said by the repeatedly measuring error of verification tensimeter (2);
And repeatedly repeating step ⅰ is to step ⅲ process, and the pipe internal pressure of adjustment back horizontal checkout pipe (4) is all inequality among the step ⅰ;
Step ⅴ, measuring error data set obtain: after the said repeatedly measuring error by verification tensimeter (2) of m among the step ⅳ is averaged respectively, just obtain with step 2 in the corresponding measuring error data set of institute's input pressure table model; Simultaneously, with obtained with step 2 in the corresponding measuring error data set of institute's input pressure table model, be added in the said measuring error database;
Step VI, gauge measurement error information are obtained: said image processing equipment (6) is according to the sequence number i# that is imported in the step I; From with step 2 in the corresponding measuring error data set of institute's input pressure table model, find out sequence number and be i# by the measuring error data Δ c of verification tensimeter (2)
i
Step V, reading are proofreaied and correct: according to formula c '=c+ Δ c
i, calculating and proofread and correct the current read in back by the manometric reading c' of verification, c is current being read by the manometric reading of verification, Δ c of extrapolating automatically in the step 603 in the formula
iFor sequence number in the step II be i# by the measuring error data of verification tensimeter (2).
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