CN102840948B - 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
- Publication number
- CN102840948B CN102840948B CN201210367197.3A CN201210367197A CN102840948B CN 102840948 B CN102840948 B CN 102840948B CN 201210367197 A CN201210367197 A CN 201210367197A CN 102840948 B CN102840948 B CN 102840948B
- Authority
- CN
- China
- Prior art keywords
- dial plate
- verification
- image
- tensimeter
- reading
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
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 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 field produces operational process, because the elastic sensing element of pointer pressure has very high physical strength, and there is the advantages such as simple in structure, cost is lower, and dependable performance, maintenance and repair are convenient, thereby obtain applying more and more widely.Along with the development of Digital Electronic Technique, part pointer pressure is replaced by digital instrument, and digital instrument accuracy is high, readability, but when measured quick variation or while fluctuating back and forth, and the indicating value of digital instrument can corresponding quick variation and difficult by reading; If control displaying time interval, will ignore variation details therebetween.Thereby from this angle, pointer pressure occupies clear superiority, it can reflect measurement variation scope intuitively, and because pointer pressure structure is relatively simple, easy to install, cost is lower, is therefore still bringing into play irreplaceable effect.But pointer pressure is after use and pressurized after a while, and movement there will be some distortion and wearing and tearing unavoidably, and correspondingly pointer pressure will produce various errors and fault.In order to guarantee, pointer original accuracy and do not make transmission of quantity value distortion, needs timely assay calibration, to guarantee indicating correct, reliable.
At present, domestic is mainly to adopt the method for artificial observation instrument index reading to carry out verification to the calibration operation of this type of pointer pressure, during actual verification, there is following defect and deficiency: the first, be subject to people's subjective factor as the impact of observation angle, observed range and fatigue strength etc., the number of degrees error existing is larger, and reliability is not high; The second,, during actual verification, adopt and manually pressurize, thereby inefficiency, and labour intensity is large; Three, long-time meter reading dish is easily tired, thereby produces interpretation mistake; Four, the single meter reading of desk checking, operating process is loaded down with trivial details; Five, the various calibration tailss of hand filling, print verification certificate, inefficiency.In addition, although there are some pointer pressure automatic verification systems on market, existing pointer pressure automatic verification system all exists to some extent and uses operation inconvenience, examines and determine number of drawbacks and the deficiencies such as efficiency is low, verification result is inaccurate.Thereby, how to realize the automatic Verification of pointer pressure, to improve calibrating efficiency, calibrating accuracy, just become a problem in the urgent need to address.
Summary of the invention
Technical matters to be solved by this invention is for 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 is high, test effect is good in batches intelligent pointer pressure calibration equipment in batches.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of intelligent pointer pressure is calibration equipment in batches, it is characterized in that: comprise horizontal check platform, be installed on the horizontal checkout pipe on horizontal check platform, respectively for a plurality of a plurality of rapid-acting couplings of being installed by verification tensimeter, be positioned at horizontal check platform the place ahead and to a plurality of described two image capture devices that absorbed by the manometric dial plate image of verification, the image processing equipment joining with two described image capture devices, to the pressue device pressurizeing in horizontal checkout pipe and the regulator that the overpressure of horizontal checkout pipe adjusted accordingly by controlling described pressue device, described pressue device joins by connecting tube and horizontal checkout pipe, and described pressue device and described regulator join, a plurality of described identical with the quantity of a plurality of described rapid-acting couplings by the manometric quantity of verification, the structure of a plurality of described rapid-acting couplings and size all identical and its be all laid in same level straight line l
1upper, a plurality of described rapid-acting coupling is installed on horizontal checkout pipe, two described image capture devices are all laid in same level straight line l
2go up, wherein horizontal linear l
2with horizontal linear l
1parallel and the spacing between the two is more than 1m, a plurality of described rapid-acting coupling is all vertically to laying, and the spacing between adjacent two the described rapid-acting couplings in left and right is 10cm～50cm, and the spacing between two described image capture devices is 40cm～80cm, a plurality of described tensimeters that are same model by verification tensimeter, and a plurality ofly describedly by verification tensimeter, be even laying.
Above-mentioned intelligent pointer pressure is calibration equipment in batches, it is characterized in that: described horizontal linear l
2with horizontal linear l
1between spacing be 1m～2m.
Above-mentioned intelligent pointer pressure is calibration equipment in batches, it is characterized in that: the Digital Video that two described image capture devices are 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 described by verification tensimeter and two described image capture devices all in same level; Described horizontal check platform the place ahead is provided with two mount pads of installing for two described image capture devices respectively.
Above-mentioned intelligent pointer pressure is calibration equipment in batches, it is characterized in that: on described horizontal check platform, be provided with the wall that exterior color is single color.
Above-mentioned intelligent pointer pressure is calibration equipment in batches, it is characterized in that: described pressue device is hydraulic system, and described connecting tube is fluid pressure line; Described hydraulic system comprises the hydraulic reservoir that joins with fluid pressure line, is arranged on the hydraulic pump on fluid pressure line and is arranged on fluid pressure line and the hydraulic control valve that the fluid pressure in fluid pressure line is adjusted; Described hydraulic control valve is hand valve or motorized valve, and described regulator should be the regulating hand wheel of pressure being arranged on described hand valve or the voltage regulator controllers joining with described motorized valve mutually.
Meanwhile, the invention also discloses a kind of method step simple, realize pointer pressure convenient and that calibrating speed is fast, calibrating accuracy is high method of calibration in batches, it is characterized in that the method comprises the following steps:
Preliminary work before step 1, verification: be first describedly installed on respectively in a plurality of described rapid-acting coupling by verification tensimeter a plurality of, restart described pressue device, and by described regulator, the overpressure of horizontal checkout pipe is adjusted to the required pressure of verification; A plurality of described rapid-acting coupling and be a plurality ofly describedly m by the manometric quantity of verification;
In described dial plate template database, be stored in the data storage cell joining with image processing equipment, and in described dial plate template database, have the dial plate template data of a plurality of different model pointer pressures; The dial plate template data of each model pointer pressure includes respectively and two two groups of template datas that described image capture device is corresponding, and each group template data includes m dial plate image information that is installed on respectively m this model pointer pressure in described rapid-acting coupling, and described 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 as follows:
Step 301, dial plate image acquisition and synchronous transmission: adopt two described image capture devices and according to identical magnification ratio, to m in step 1 is described, by the manometric dial plate image of verification, gathered respectively, and gathered image synchronization is sent to image processing equipment, the identical pending image of corresponding acquisition two width sizes; Described in two width, in pending image, all comprise a plurality of described by the manometric dial plate image of verification;
Step 302, dial plate image are cut apart: described image processing equipment calling graph looks like to cut apart module, respectively to pending Image Segmentation Using described in two width in step 301, and obtain two groups of single dial plate images after cutting apart; Described in two groups, in single dial plate image, include m single dial plate image, and described in m width single dial plate image be respectively in step 1 m described by the manometric dial plate image of verification;
Step 303, dial plate image information acquisition: described image processing equipment obtains respectively described in two groups the dial plate image information of each single dial plate image in single dial plate image, just obtain the dial plate template data corresponding with institute's input pressure table model in 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; Meanwhile, described image processing equipment calls straight-line detection module, detects respectively described in two groups the equation of each single dial plate image pointer place straight line in single dial plate image;
Step 304, dial plate template data add: the dial plate template data corresponding with institute's input pressure table model in step 2 by obtaining in step 303, is added in described dial plate template database; Afterwards, enter step 6;
Step 601, pending dial plate image information acquisition: described image processing equipment, in described pending information, is transferred out respectively current read by manometric two the single dial plate images of verification;
Step 602, binocular stereo vision images match: described image processing equipment calls binocular stereo vision images match module, to transferring the information to be matched of two single dial plate images in step 601, process, and the dial plate image information after corresponding acquisition coupling; Described information to be matched is the dial plate image information of single dial plate image and the equation of two single dial plate image pointer place straight lines described in two width, and the dial plate image information after coupling is that the current read that obtains afterwards of coupling is 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 place straight line l
5equation;
Step 603, data processing: described image processing equipment is according to the dial plate image information after coupling in step 602, and combination is by verification manometric range Δ c and measurement lower limit value c
0, automatically extrapolate current read by the manometric reading of verification.
Said method, is characterized in that: it is that histogram thresholding is cut apart module that the image described in step 302 is cut apart module, and the straight-line detection module described in step 303 and step 4 is Hough conversion module.
Said method, it is characterized in that: when current read is calculated automatically by the manometric reading of verification in step 603, described image processing equipment first, according to the pixel location data of dial plate central point, scale mark reference position and scale mark final position in dial plate image information after coupling in step 602, is extrapolated dial plate central point and scale mark reference position place straight line l
3equation and dial plate central point and scale mark final position place straight line l
4equation; Afterwards, then 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: before carrying out the front preliminary work of verification in step 1, need first to m described rapid-acting coupling, be numbered, and after numbering, the individual described rapid-acting coupling of m is respectively 1# joint, 2# joint, 3# joint from left to right ... m# joint; Accordingly, in m described rapid-acting coupling, install m described is respectively 1#, 2#, 3#...m# by the manometric sequence number of verification;
In step 601, current read is i# by the manometric sequence number of verification, wherein i=1,2,3...m;
In step 603, automatically extrapolate current read by the manometric reading of verification after, described image processing equipment also needs the reading to automatically extrapolating to carry out error correction, its error correction is as follows:
Step I, current read are inputted by verification tensimeter sequence number: by parameter set unit, input current read by the manometric sequence number i# of verification;
Step II, measuring error data group are obtained: described image processing equipment is according to the tensimeter model of inputting in step 2, and call model matching module, in the measuring error database that judgement is set up in advance, whether there is the measuring error data group corresponding with institute's input pressure table model in step 2: if exist, enter step VI; Otherwise, enter step III;
Step III, measuring error data group are obtained, and its acquisition process is as follows:
Step I, overpressure adjustment: by described regulator, the overpressure of horizontal checkout pipe is adjusted;
Step II, pressure gauge reading obtain: according to step 2 to the method described in step 6, obtain under current state m described by the manometric reading of verification;
Step III, measuring error are asked for: people is described by the manometric reading of verification for reading under current state m, again to m described by the manometric people of verification for after reading and being obtained reading in reading and step II and do respectively to differ from, just under corresponding acquisition current state, m is individual described by the manometric measuring error of verification;
Step IV, repeatedly repeating step I is to step III, obtain m described by the manometric repeatedly measuring error of verification;
And repeatedly repeating step I is to step III process, and after adjusting in step I, the overpressure of horizontal checkout pipe is all not identical;
Step V, measuring error data group are obtained: to m in step IV is described by the manometric repeatedly measuring error of verification, averaged respectively after, just obtain the measuring error data group corresponding with institute's input pressure table model in step 2; Meanwhile, the measuring error data group corresponding with institute's input pressure table model in step 2 by obtained, is added in described measuring error database;
Step VI, gauge measurement error information are obtained: described image processing equipment is according to the sequence number i# inputting in step I, in the measuring error data group corresponding with institute's input pressure table model in step 2, 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 rear current read by the manometric reading c' of verification, in formula, c is current being read by the manometric reading of verification, Δ c of automatically extrapolating in step 603
ifor sequence number in step II is 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 adopts is simple in structure, install and lay convenient and input cost is lower.
2, use easy and simple to handlely, pressure is easy to adjust.
3, the batch method of calibration step adopting simply, realization is convenient and verification speed is fast in batches.
4, adopt Binocular Stereo Vision System to carry out verification, calibration accuracy is high.Meanwhile, by reading that image processing equipment obtains is carried out to error correction, further guaranteed calibration accuracy
5, result of use is good, binocular stereo vision obtains after pressure gauge reading, can synchronously complete error analysis, realizes the automatic Verification of pointer instrument, acquisition is higher than manual calibrating accuracy, reaches the object such as raise the efficiency, reduce personnel attrition, reduce costs.
6, widely applicable, can effectively promote and be suitable for to the batch verification process of all pointer instruments.
7, economic benefit and social benefit are remarkable, greatly improve calibrating speed and the accuracy of pointer pressure, estimate 200,000 of year increase calibrating amounts, 6,000,000 yuan of direct economic benefits, can improve manometric all inspection rates in field produces operational outfit greatly, for the accuracy rate that improves transmission of quantity value, the running status of stabilizing equipment, find in time operating labile factor, have stronger directive function, social benefit is obvious.
In sum, the present invention is reasonable in design, use easy and simple to handle and result of use good, increased substantially calibrating efficiency and the calibrating accuracy of pointer pressure.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is that the present invention adopts the use state reference map of calibration equipment in batches.
Fig. 2 is that the present invention adopts the schematic block circuit diagram of calibration equipment in batches.
Fig. 3 is that the present invention adopts the FB(flow block) of method of calibration in batches.
Fig. 4 be Binocular Stereo Vision System look squarely binocular stereo imaging schematic diagram.
Description of reference numerals:
1-horizontal check platform; 2-by 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-regulating hand wheel of pressure; 10-1-vertical supporting bar;
10-2-horizontal seat; 11-baffle plate; 12-parameter set unit;
13-data storage cell.
Embodiment
As Fig. 1, a kind of intelligent pointer pressure shown in Fig. 2 is calibration equipment in batches, comprise horizontal check platform 1, be installed on the horizontal checkout pipe 4 on horizontal check platform 1, respectively for a plurality of a plurality of rapid-acting couplings 3 of being installed by verification tensimeter 2, be positioned at horizontal check platform 1 the place ahead and to a plurality of described two image capture devices 5 that absorbed by the dial plate image of verification tensimeter 2, the image processing equipment 6 joining with two described image capture devices 5, to the pressue device pressurizeing in horizontal checkout pipe 4 and the regulator that the overpressure of horizontal checkout pipe 4 adjusted accordingly by controlling described pressue device, described pressue device joins by connecting tube and horizontal checkout pipe 4, and described pressue device and described regulator join.A plurality of described identical with the quantity of a plurality of described rapid-acting couplings 3 by the quantity of verification tensimeter 2.The structure of a plurality of described rapid-acting couplings 3 and size all identical and its be all laid in same level straight line l
1upper, a plurality of described rapid-acting coupling 3 is installed on horizontal checkout pipe 4.Two described image capture devices 5 are all laid in same level straight line l
2go up, wherein horizontal linear l
2with horizontal linear l
1parallel and the spacing between the two is more than 1m.A plurality of described rapid-acting coupling 3 is all vertically to laying, and the spacing between adjacent two the described rapid-acting couplings 3 in left and right is 10cm～50cm, and the spacing between two described image capture devices 5 is 40cm～80cm; A plurality of described tensimeters that are same model by verification tensimeter 2, and a plurality ofly describedly by verification tensimeter 2, be even laying.
During actual connection, one end sealing and its other end of described horizontal checkout pipe 4 join by described connecting tube and described pressue device.
During actual laying, a plurality of be describedly laid on same perpendicular by verification tensimeter 2, and two described image capture devices 5 are laid on same perpendicular.Described horizontal linear l
2with horizontal linear l
1between spacing be 1m～2m.
In the present embodiment, described horizontal linear l
2with horizontal linear l
1between spacing be 1.5m.During actual verification, can be according to specific needs, to described horizontal linear l
2with horizontal linear l
1between spacing adjust accordingly.
In the present embodiment, the Digital Video that two described image capture devices 5 are 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, described horizontal check platform 1 the place ahead is provided with two mount pads of installing for two described image capture devices 5 respectively, and described mount pad comprises vertical supporting bar 10-1 and is arranged on the horizontal seat 10-2 on vertical supporting bar 10-1.
Meanwhile, on described horizontal check platform 1, be provided with the wall that exterior color is single color.In the present embodiment, described wall is one and is the vertical baffle plate 11 to laying, and the color of described wall is with larger by the color distortion of verification tensimeter 2 outer edge line, is beneficial to distinguish.
In the present embodiment, described pressue device is hydraulic system, and described connecting tube is fluid pressure line 7-4.During actual use, by described hydraulic system, in horizontal checkout pipe 4, pressurize, and describedly by verification tensimeter 2, the fluid pressure in horizontal checkout pipe 4 is measured by a plurality of simultaneously.And, by described regulator, the fluid pressure in horizontal checkout pipe 4 is adjusted.
During actual use, also can adopt baric systerm to pressurizeing in horizontal checkout pipe 4, now a plurality of describedly simultaneously the gaseous tension in horizontal checkout pipe 4 is measured by verification tensimeter 2.
Described hydraulic system comprises the hydraulic reservoir 7-1 that joins with fluid pressure line 7-4, is arranged on the hydraulic pump 7-2 on fluid pressure line 7-4 and is arranged on the hydraulic control valve 7-3 that fluid pressure line 7-4 is upper and the fluid pressure in fluid pressure line 7-4 is adjusted; Described hydraulic control valve 7-3 is hand valve or motorized valve, and described regulator should be the regulating hand wheel of pressure 8 being arranged on described hand valve or the voltage regulator controllers joining with described motorized valve mutually.
In the present embodiment, described hydraulic control valve 7-3 is hand valve, and described regulator is the regulating hand wheel of pressure 8 being arranged on described hand valve.During actual installation, described hydraulic reservoir 7-1 and hydraulic pump 7-2 are arranged in described horizontal check platform 1, and described hand valve is arranged on described horizontal check platform 1.
During actual installation, the spacing between adjacent two the described rapid-acting couplings 3 in left and right is 20cm ± 5cm, and the spacing between two described image capture devices 5 is 50cm ± 5cm.
In the present embodiment, the spacing between adjacent two the described rapid-acting couplings 3 in left and right is 20cm, and the spacing between two described image capture devices 5 is 50cm.In actual use procedure, can according to specific needs, the spacing between adjacent two the described rapid-acting couplings 3 in left and right and the spacing between two described image capture devices 5 be adjusted accordingly.
A kind of pointer pressure is as shown in Figure 3 method of calibration in batches, comprises the following steps:
Preliminary work before step 1, verification: be first describedly installed on respectively in a plurality of described rapid-acting coupling 3 by verification tensimeter 2 a plurality of, restart described pressue device, and by described regulator, the overpressure of horizontal checkout pipe 4 is adjusted to the required pressure of verification; A plurality of described rapid-acting coupling 3 and a plurality of described quantity by verification tensimeter 2 are m.
The overpressure of horizontal checkout pipe 4 is adjusted to the required pressure of verification, and described in each by after the stable reading of verification tensimeter 2, then enter step 2.
During actual use, a plurality of described rapid-acting coupling 3 and a plurality of described quantity by verification tensimeter 2 are 4～10.
In the present embodiment, m=6.That is to say described rapid-acting coupling 3 and be 6 by the quantity of verification tensimeter 2.In actual use procedure, also can according to specific needs, the value of m be adjusted accordingly.
In actual mechanical process, also need m described rapid-acting coupling 3 to be numbered, and after numbering, m described rapid-acting coupling 3 is respectively 1# joint, 2# joint, 3# joint, 4# joint, 5# joint and 6# joint from left to right.6 described titles by verification tensimeter 2 of installing in 6 described rapid-acting couplings 3 accordingly, are respectively 1# tensimeter, 2# tensimeter, 3# tensimeter, 4# tensimeter, 5# tensimeter and 6# tensimeter.
In described dial plate template database, be stored in the data storage cell 13 joining with image processing equipment 6, and in described dial plate template database, have the dial plate template data of a plurality of different model pointer pressures.The dial plate template data of each model pointer pressure includes respectively and two two groups of template datas that described image capture device 5 is corresponding, and each group template data includes m dial plate image information that is installed on respectively m this model pointer pressure in described rapid-acting coupling 3, and described dial plate image information comprises the pixel location data of dial plate central point, scale mark reference position and scale mark final position.
Wherein, dial plate central point is by the central point of verification tensimeter 2 pointer institute fixed rotating shafts.
Step 3, dial plate template data obtain, and its acquisition process is as follows:
Step 301, dial plate image acquisition and synchronous transmission: adopt two described image capture devices 5 and according to identical magnification ratio, respectively m in step 1 the described dial plate image by verification tensimeter 2 gathered, and gathered image synchronization is sent to image processing equipment 6, the identical pending image of corresponding acquisition two width sizes; Described in two width, in pending image, all comprise a plurality of described by the dial plate image of verification tensimeter 2.
In the present embodiment, two described image capture devices 5 are respectively image capture device one and the image capture device two that is positioned at described image capture device one right side.
In actual use procedure, two described image processing equipments 6 are by pending image described in two width, and stores synchronized is to data storage cell 13.And pending image carries out associated by associative cell with image capture device title (being described image capture device one or image capture device two) respectively described in two width.
Step 302, dial plate image are cut apart: described image processing equipment 6 calling graphs look like to cut apart module, respectively to pending Image Segmentation Using described in two width in step 301, and obtain two groups of single dial plate images after cutting apart; Described in two groups, in single dial plate image, include m single dial plate image, and described in m width single dial plate image be respectively in step 1 m described by the dial plate image of verification tensimeter 2.
In the present embodiment, two groups of single dial plate images carry out associated by associative cell with the image capture device title of two described image capture devices 5 respectively.And, due to m in single dial plate image described in every group single dial plate image be respectively in step 1 m described by the dial plate image of verification tensimeter 2, thereby the single dial plate image of m in single dial plate image described in every group, by associative cell, will by the title of verification tensimeter 2, be undertaken associated with m is described respectively.
Step 303, dial plate image information acquisition: described image processing equipment 6 obtains respectively described in two groups the dial plate image information of each single dial plate image in single dial plate image, just obtain the dial plate template data corresponding with institute's input pressure table model in 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; Meanwhile, described image processing equipment 6 calls straight-line detection module, detects respectively described in two groups the equation of each single dial plate image pointer place straight line in single dial plate image.
In the present embodiment, the dial plate image information of each single dial plate image in single dial plate image described in two groups, all carries out associated by associative cell with corresponding image capture device title and tensimeter title.
Step 304, dial plate template data add: the dial plate template data corresponding with institute's input pressure table model in step 2 by obtaining in step 303, is added in described dial plate template database; Afterwards, enter step 6.
Step 601, pending dial plate image information acquisition: described image processing equipment 6, in described pending information, is transferred out respectively current read by two single dial plate images of verification tensimeter 2.
Step 602, binocular stereo vision images match: described image processing equipment 6 calls binocular stereo vision images match module, to transferring the information to be matched of two single dial plate images in step 601, process, and the dial plate image information after corresponding acquisition coupling; Described information to be matched is the dial plate image information of single dial plate image and the equation of two single dial plate image pointer place straight lines described in two width, and the dial plate image information after coupling is that the current read that obtains afterwards of coupling is 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 place straight line l
5equation.
Step 603, data processing: described image processing equipment 6 is according to the dial plate image information after coupling in step 602, and combination is by the range Δ c of verification tensimeter 2 and measurement lower limit value c
0, automatically extrapolate current read by the reading of verification tensimeter 2.
In the present embodiment, when current read is calculated automatically by the reading of verification tensimeter 2 in step 603, described image processing equipment 6, first according to the pixel location data of dial plate central point, scale mark reference position and scale mark final position in dial plate image information after coupling in step 602, is extrapolated dial plate central point and scale mark reference position place straight line l
3equation and dial plate central point and scale mark final position place straight line l
4equation; Afterwards, then 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 described image capture devices 5 to be demarcated respectively, and to demarcate the inside and outside parameter of image capture device 5 described in latter two.Meanwhile, also need in advance by the spacing between two described image capture devices 5 of parameter set unit 12 inputs (distance of the line of the projection centre of two described image capture devices 5 specifically, baseline is apart from being b).
Because the demarcation of Binocular Stereo Vision System mainly refers to after inner parameter (as the focal length) demarcation of video camera, determine that the structural parameters R of vision system and T(are the position relationship between two video cameras, R and T are respectively rotation matrix and translation vector).Conventional method is 2D or the 3D precision target drone of employing standard, by the corresponding relation of camera review coordinate and three-dimensional world coordinate, tries to achieve above-mentioned parameter.In the present embodiment, adopt 2D or the 3D precision target drone of standard, and by the image coordinate of image capture device 5 and the corresponding relation of three-dimensional world coordinate, try to achieve the internal and external parameter of image capture device 5.
In step 602, actual while carrying out binocular stereo vision images match, in conjunction with demarcating the inside and outside parameter of image capture device 5 described in latter two and the spacing between two described image capture devices 5, carry out matching treatment.
In addition, actual while carrying out binocular stereo vision images match in step 602, shooting angle when described image processing equipment 6 is gathered by the dial plate image of verification tensimeter 2 according to 6 pairs of current reads of transfer in step 601 two image processing equipments, and call binocular stereo vision images match module and carry out binocular stereo vision images match.
Wherein, 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 generally by twin camera, from different angles, is obtained two width images of scenery around simultaneously, or there is single camera not obtaining from different perspectives in the same time two width digital pictures of scenery around, and based on principle of parallax, can recover the 3-D geometric model of object, rebuild around 3D shape and the position of scenery.
In many application that binocular stereo vision is measured, can be in object under test surface distributed some elements that there is obvious characteristic and be easy to identification serve as a mark a little, as line etc. portrayed in circle, cross.If load unique identity information to gauge point, gauge point is encoded, gauge point in image is carried out after unique identification, can facilitate, realize reliably the Corresponding matching of gauge point between multiple image.
Thereby, in this step, image processing equipment 6 calls the process that binocular stereo vision images match module is processed described information to be matched, is the straight line at the dial plate image information of single dial plate image described in two width and two single dial plate image pointer places is carried out respectively to the process of Stereo matching.
Actual while carrying out Stereo matching, because Stereo matching is that (as left order image and right order image) finds out characteristic of correspondence point from two width images of stereo-picture.And be to guarantee to obtain unique point accurately, require the outer limit of two width stereo-pictures on same sweep trace.Yet in real work, the configuration of two image capture devices that adopt always exists some errors, even parallel vertical projection pattern can not guarantee that outer polar curve is level, thereby while causing Stereo matching, parallax search is complicated.Thereby, before Stereo matching, need the outer polar curve of stereoscopic image to carry out rectification, make Stereo matching can reach a good level.
To sum up, use Binocular Stereo Vision System can determine the three-D profile of arbitrary objects, and can obtain the three-dimensional coordinate of arbitrfary point on profile.
In the present embodiment, described binocular stereo vision images match module adopts the image processing software HALCON of German MVtec company.HALCON is widely used machine vision software worldwide.HALCON also comprises the 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 access by C, C++, C#, Visual Basic and Delphi language.HALCON and hardware independent in addition, support most of image pick-up cards and the collecting device driving with DirectShow and IEEE 1394, and user can utilize its Open architecture fast Development image to process and machine vision applications software.
In the present embodiment, in conjunction with Fig. 4, the distance of the line of the projection centre of two video cameras (or camera), 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 after the photocentre of camera lens, in Fig. 4, left and right imaging plane is plotted in to 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 x axle and the y direction of principal axis of camera coordinate system with v axle, can simplify computation process like this.The initial point of left and right two width images (two single dial plate images for example, transferring in step 601 in the present embodiment) coordinate system is at intersection point O1 and the O2 of camera optical axis and plane.In space, certain some P corresponding coordinate in left image and right image is respectively P1 (u1, v1) and P2 (u2, v2).Suppose that the image of two video cameras is in same plane, put the Y coordinate of P in the two width image coordinate systems of left and right identical, i.e. v1=v2.By triangle geometric relationship, obtained:
(x in formula
c, y
c, z
c) be the three dimensional space coordinate of some P in left camera coordinate system, b is baseline distance, and f is the focal length of two video cameras, and (u1, v1) and (u2, v2) is respectively the coordinate (being pixel location data) of a P in left image and right image.
Parallax is defined as certain some alternate position spike of respective point in the two width images of left and right:
can calculate thus the coordinate of certain some P in left camera coordinate system in space is:
Therefore, as long as can find the respective point of certain point in the video camera image planes of two of left and right in space, and by camera calibration, obtain the inside and outside parameter of video camera, just can determine the three-dimensional coordinate of this point.That is to say, by trying to achieve the image coordinate of respective point in two images in left and right, just can ask for three dimensional space coordinate by binocular stereo vision measuring principle.
In the present embodiment, described image processing equipment 6 calls binocular stereo vision images match module, while processing the dial plate image information after also corresponding acquisition coupling to transferring the information to be matched of two single dial plate images in step 601, specifically 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 (the specifically mid point of start index line in dial scale line), scale mark final position (specifically stopping the mid point of scale mark in dial scale line) and pointer.
In the present embodiment, due to current read by dial plate central point, scale mark reference position, scale mark final position and pointer in verification tensimeter 2 all on same perpendicular, 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, on same perpendicular, on dial plate central point, scale mark reference position, scale mark final position and pointer, the y axial coordinate of any two points is all identical.Therefore,, according to the three dimensional space coordinate of any two points on obtained dial plate central point, scale mark reference position, scale mark final position and pointer, just can go out straight line l by direct solution
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, then according to formula
calculate current read by the reading c of verification tensimeter 2.
In addition, because Binocular Stereo Vision System must be arranged on a stabilised platform, when carrying out binocular vision system demarcation and applying this system measuring, intrinsic parameter (such as focal length) and two the video camera relative position relations of guaranteeing video camera can not change, if any one changes, need again Binocular Stereo Vision System to be demarcated.In the present embodiment, the position of two described image capture devices 5 maintains static.
The installation method of Binocular Stereo Vision System affects the precision of measurement result.The precision of measuring can be drawn by following formula:
shi Zhong ⊿ z represents the precision of distance between the measured point that measures and stereo visual system, and z refers to the absolute distance of measured point and stereo visual system, and f refers to the focal length of video camera, b represents that the baseline Ju ， ⊿ d of Binocular Stereo Vision System represents measured point parallax precision.In order to obtain higher precision, should make the focal length of video camera and base length increase, 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 crossover region enough large and two video cameras should approximately align, that is to say that the angle of each camera intrinsic optical axis rotation can not be too large.
In the present embodiment, the straight-line detection module described in step 303 and step 4 is Hough conversion module.In actual use procedure, also can adopt the line detection method of other type.
In the present embodiment, it is that histogram thresholding is cut apart module that the image described in step 302 is cut apart module.During actual use, also can adopt the image of other type to cut apart module.
In the present embodiment, a plurality of described by verification tensimeter 2 and two described image capture devices 5 all in same level.That is to say, adopt the flat mode of taking the photograph.
Actual while carrying out image acquisition, the shooting angle of described 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 to determine one of other element of scape.Actual employing is put down and was clapped when (or claiming flat taking the photograph), mode was carried out image acquisition, photography used (elephant) machine and the subject a kind of shooting angle in same level line.Flat taking the photograph generally can be divided into three kinds, front, side and inclined-plane.In the present embodiment, adopt the flat mode of taking the photograph.That is to say, a plurality of described by verification tensimeter 2 and two described image capture devices 5 in same level.
In the present embodiment, before carrying out the front preliminary work of verification in step 1, need first to m described rapid-acting coupling 3, be numbered, and after numbering, the individual described rapid-acting coupling 3 of m is respectively 1# joint, 2# joint, 3# joint from left to right ... m# joint; M the described sequence number by verification tensimeter 2 of installing in m described rapid-acting coupling 3 accordingly, is respectively 1#, 2#, 3#...m#;
In step 601, current read is i# by the sequence number of verification tensimeter 2, wherein i=1,2,3...m.
In step 603, automatically extrapolate current read by the manometric reading of verification after, described image processing equipment 6 also needs the reading to automatically extrapolating to carry out error correction, its error correction is as follows:
Step I, current read are inputted by verification tensimeter sequence number: by parameter set unit 12, input current read by the manometric sequence number i# of verification;
Step II, measuring error data group are obtained: described image processing equipment 6 is according to the tensimeter model of inputting in step 2, and call model matching module, in the measuring error database that judgement is set up in advance, whether there is the measuring error data group corresponding with institute's input pressure table model in step 2: if exist, enter step VI; Otherwise, enter step III;
Step III, measuring error data group are obtained, and its acquisition process is as follows:
Step I, overpressure adjustment: by described regulator, the overpressure of horizontal checkout pipe 4 is adjusted;
Step II, pressure gauge reading obtain: according to step 2 to the method described in step 6, obtain under current state m described by the reading of verification tensimeter 2;
Step III, measuring error are asked for: people be read under current state m described by the reading of verification tensimeter 2, again to m described by the people of verification tensimeter 2 for after reading and being obtained reading in reading and step II and do respectively to differ from, just under corresponding acquisition current state, m is individual described by the measuring error of verification tensimeter 2;
Wherein, each is by the measuring error of verification tensimeter 2, and being this manometric people is to read the difference between reading of obtaining in reading and step II;
Step IV, repeatedly repeating step I is to step III, obtain m described by the repeatedly measuring error of verification tensimeter 2;
And repeatedly repeating step I is to step III process, and after adjusting in step I, the overpressure of horizontal checkout pipe 4 is all not identical;
Step V, measuring error data group are obtained: after m in step IV the described repeatedly measuring error by verification tensimeter 2 averaged respectively, just obtain the measuring error data group corresponding with institute's input pressure table model in step 2; Meanwhile, the measuring error data group corresponding with institute's input pressure table model in step 2 by obtained, is added in described measuring error database;
That is to say, in step IV, each is by the mean value of more than 2 measuring error of verification tensimeter, just be these manometric measuring error data, and m described by the measuring error data of the verification tensimeter 2 composition measuring error data group corresponding with institute's input pressure table model in step 2;
Step VI, gauge measurement error information are obtained: described image processing equipment 6 is according to the sequence number i# inputting in step I, in the measuring error data group corresponding with institute's input pressure table model in step 2, 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 rear current read by the manometric reading c' of verification, in formula, c is current being read by the manometric reading of verification, Δ c of automatically extrapolating in step 603
ifor sequence number in step II is i# by the measuring error data of verification tensimeter 2.
In the present embodiment, described measuring error database is stored in data storage cell 13.
During actual use, m by the measuring error data Δ c of verification tensimeter 2
iall not identical, as long as reason is all different by the shooting direction of verification tensimeter 2 and shooting distance distance to each of two described image capture devices 5.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification of above embodiment being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong in the protection domain of technical solution of the present invention.
Claims (10)
1. intelligent pointer pressure calibration equipment in batches, it is characterized in that: comprise horizontal check platform (1), be installed on the horizontal checkout pipe (4) on horizontal check platform (1), supply respectively a plurality of a plurality of rapid-acting couplings (3) of being installed by verification tensimeter (2), be positioned at horizontal check platform (1) the place ahead and to a plurality of described two image capture devices (5) that absorbed by the dial plate image of verification tensimeter (2), the image processing equipment (6) joining with two described image capture devices (5), to the pressue device pressurizeing in horizontal checkout pipe (4) and the regulator that the overpressure of horizontal checkout pipe (4) adjusted accordingly by controlling described pressue device, described pressue device joins by connecting tube and horizontal checkout pipe (4), and described pressue device and described regulator join, a plurality of described identical with the quantity of a plurality of described rapid-acting couplings (3) by the quantity of verification tensimeter (2), the structure of a plurality of described rapid-acting couplings (3) and size all identical and its be all laid in same level straight line l
1upper, a plurality of described rapid-acting couplings (3) are installed on horizontal checkout pipe (4), two described image capture devices (5) are all laid in same level straight line l
2go up, wherein horizontal linear l
2with horizontal linear l
1parallel and the spacing between the two is more than 1m, a plurality of described rapid-acting couplings (3) are all vertically to laying, and the spacing between adjacent two the described rapid-acting couplings in left and right (3) is 10cm～50cm, and the spacing between two described image capture devices (5) is 40cm～80cm, a plurality of described tensimeters that are same model by verification tensimeter (2), and a plurality ofly describedly by verification tensimeter (2), be even laying.
2. according to intelligent pointer pressure batch calibration equipment claimed in claim 1, it is characterized in that: described horizontal linear l
2with horizontal linear l
1between spacing be 1m～2m.
3. according to the intelligent pointer pressure batch calibration equipment described in claim 1 or 2, it is characterized in that: the digital camera that two described image capture devices (5) are the Digital Video of same model or same model.
4. according to the calibration equipment in batches of the intelligent pointer pressure described in claim 1 or 2, it is characterized in that: a plurality of described by verification tensimeter (2) with two described image capture devices (5) all in same level; Described horizontal check platform (1) the place ahead is provided with two mount pads that supply respectively two described image capture devices (5) to install.
5. according to the intelligent pointer pressure batch calibration equipment described in claim 1 or 2, it is characterized in that: on described horizontal check platform (1), be provided with the wall that exterior color is single color.
6. according to the intelligent pointer pressure batch calibration equipment described in claim 1 or 2, it is characterized in that: described pressue device is hydraulic system, and described connecting tube is fluid pressure line (7-4); Described hydraulic system comprises the hydraulic reservoir (7-1) that joins with fluid pressure line (7-4), is arranged on the hydraulic pump (7-2) on fluid pressure line (7-4) and is arranged on fluid pressure line (7-4) hydraulic control valve (7-3) upper and that the fluid pressure in fluid pressure line (7-4) is adjusted; Described hydraulic control valve (7-3) is hand valve or motorized valve, and described regulator should be the regulating hand wheel of pressure (8) being arranged on described hand valve or the voltage regulator controllers joining with described motorized valve mutually.
7. utilization is installed as claimed in claim 1 pointer pressure is carried out to a method for verification in batches, it is characterized in that the method comprises the following steps:
Preliminary work before step 1, verification: be first describedly installed on respectively in a plurality of described rapid-acting couplings (3) by verification tensimeter (2) a plurality of, restart described pressue device, and by described regulator, the overpressure of horizontal checkout pipe (4) is adjusted to the required pressure of verification; A plurality of described rapid-acting couplings (3) and a plurality of described quantity by verification tensimeter (2) are m;
Step 2, by verification tensimeter model input and model, mated: first by the parameter set unit (12) of joining with image processing equipment (6), a plurality of described by the model of verification tensimeter (2) in input step one; Afterwards, described image processing equipment (6) is according to inputted tensimeter model, and call in the dial plate template database that model matching module judgement sets up in advance whether have the manometric dial plate template data of this model: while there is the manometric dial plate template data of this model in judgement draws described dial plate template database, enter step 4; Otherwise, enter step 3;
In described dial plate template database, be stored in the data storage cell (13) joining with image processing equipment (6), and in described dial plate template database, have the dial plate template data of a plurality of different model pointer pressures; The dial plate template data of each model pointer pressure includes two groups of corresponding with two described image capture devices (5) respectively template datas, and each group template data includes m dial plate image information that is installed on respectively m this model pointer pressure in described rapid-acting coupling (3), and described 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 as follows:
Step 301, dial plate image acquisition and synchronous transmission: adopt two described image capture devices (5) and according to identical magnification ratio, respectively m in step 1 the described dial plate image by verification tensimeter (2) gathered, and gathered image synchronization is sent to image processing equipment (6), the identical pending image of corresponding acquisition two width sizes; Described in two width, in pending image, all comprise a plurality of described by the dial plate image of verification tensimeter (2);
Step 302, dial plate image are cut apart: described image processing equipment (6) calling graph looks like to cut apart module, respectively to pending Image Segmentation Using described in two width in step 301, and obtain two groups of single dial plate images after cutting apart; Described in two groups, in single dial plate image, include m single dial plate image, and described in m width single dial plate image be respectively in step 1 m described by the dial plate image of verification tensimeter (2);
Step 303, dial plate image information acquisition: described image processing equipment (6) obtains respectively described in two groups the dial plate image information of each single dial plate image in single dial plate image, just obtain the dial plate template data corresponding with institute's input pressure table model in 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; Meanwhile, described image processing equipment (6) calls straight-line detection module, detects respectively described in two groups the equation of each single dial plate image pointer place straight line in single dial plate image;
Step 304, dial plate template data add: the dial plate template data corresponding with institute's input pressure table model in step 2 by obtaining in step 303, is added in described dial plate template database; Afterwards, enter step 6;
Step 4, dial plate image acquisition, cut apart and pointer place straight-line detection: first according to step 301 to the method described in step 302, obtain two groups of single dial plate images after cutting apart; Afterwards, described image processing equipment (6) calls straight-line detection module, detects respectively described in two groups the equation of each single dial plate image pointer place straight line in single dial plate image; Subsequently, enter step 5;
Step 5, template matches: described image processing equipment (6) is first transferred the dial plate template data corresponding with institute's input pressure table model in step 2, then call template matches module coupling and draw in step 4 described in two groups the dial plate image information of each single dial plate image in single dial plate image; Afterwards, enter step 6;
Step 6, pressure gauge reading obtain: described image processing equipment (6) is treated process information and carried out analyzing and processing, and in corresponding obtaining step one, m is individual described by the reading of verification tensimeter (2), and each is all identical by the reading acquisition process of verification tensimeter (2); Described pending information be in step 303, obtain or step 5 in the dial plate image information of each single dial plate image and the equation of each single dial plate image pointer place straight line in single dial plate image described in coupling draw two groups; For any, by verification tensimeter (2), its reading acquisition process is as follows:
Step 601, pending dial plate image information acquisition: described image processing equipment (6), in described pending information, is transferred out respectively current read by two single dial plate images of verification tensimeter (2);
Step 602, binocular stereo vision images match: described image processing equipment (6) calls binocular stereo vision images match module, to transferring the information to be matched of two single dial plate images in step 601, process, and the dial plate image information after corresponding acquisition coupling; Described information to be matched is the dial plate image information of single dial plate image and the equation of two single dial plate image pointer place straight lines described in two width, and the dial plate image information after coupling is that the current read that obtains afterwards of coupling is 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 place straight line l
5equation;
Step 603, data processing: described image processing equipment (6) is according to the dial plate image information after coupling in step 602, and combination is by the range Δ c of verification tensimeter (2) and measurement lower limit value c
0, automatically extrapolate current read by the reading of verification tensimeter (2).
8. it is characterized in that in accordance with the method for claim 7: it is that histogram thresholding is cut apart module that the image described in step 302 is cut apart module; Straight-line detection module described in step 303 and step 4 is Hough conversion module.
9. according to the method described in claim 7 or 8, it is characterized in that: when current read is calculated automatically by the reading of verification tensimeter (2) in step 603, described image processing equipment (6) first, according to the pixel location data of dial plate central point, scale mark reference position and scale mark final position in dial plate image information after coupling in step 602, is extrapolated dial plate central point and scale mark reference position place straight line l
3equation and dial plate central point and scale mark final position place straight line l
4equation; Afterwards, then 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 the method described in claim 7 or 8, it is characterized in that: before carrying out the front preliminary work of verification in step 1, need first m described rapid-acting coupling (3) to be numbered, and after numbering, m described rapid-acting coupling (3) is respectively 1# joint, 2# joint, 3# joint from left to right ... m# joint; M the described sequence number by verification tensimeter (2) of installing in m described rapid-acting coupling (3) accordingly, is respectively 1#, 2#, 3# ... m#;
In step 601, current read is i# by the sequence number of verification tensimeter (2), wherein i=1,2,3 ... m;
In step 603, automatically extrapolate current read by the manometric reading of verification after, described image processing equipment (6) also needs the reading to automatically extrapolating to carry out error correction, its error correction is as follows:
Step I, current read are inputted by verification tensimeter sequence number: by parameter set unit (12), input current read by the manometric sequence number i# of verification;
Step II, measuring error data group are obtained: described image processing equipment (6) is according to the tensimeter model of inputting in step 2, and call model matching module, in the measuring error database that judgement is set up in advance, whether there is the measuring error data group corresponding with institute's input pressure table model in step 2: if exist, enter step VI; Otherwise, enter step III;
Step III, measuring error data group are obtained, and its acquisition process is as follows:
Step I, overpressure adjustment: by described regulator, the overpressure of horizontal checkout pipe (4) is adjusted;
Step II, pressure gauge reading obtain: according to step 2 to the method described in step 6, obtain under current state m described by the reading of verification tensimeter (2);
Step III, measuring error are asked for: people is described by the reading of verification tensimeter (2) for reading under current state m, again to m described by the people of verification tensimeter (2) for after reading and being obtained reading in reading and step II and do respectively to differ from, just under corresponding acquisition current state, m is individual described by the measuring error of verification tensimeter (2);
Step IV, repeatedly repeating step I is to step III, obtain m described by the repeatedly measuring error of verification tensimeter (2);
And repeatedly repeating step I is to step III process, and after adjusting in step I, the overpressure of horizontal checkout pipe (4) is all not identical;
Step V, measuring error data group are obtained: after m in step IV the described repeatedly measuring error by verification tensimeter (2) averaged respectively, just obtain the measuring error data group corresponding with institute's input pressure table model in step 2; Meanwhile, the measuring error data group corresponding with institute's input pressure table model in step 2 by obtained, is added in described measuring error database;
Step VI, gauge measurement error information are obtained: described image processing equipment (6) is according to the sequence number i# inputting in step I, in the measuring error data group corresponding with institute's input pressure table model in step 2, 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 rear current read by the manometric reading c' of verification, in formula, c is current being read by the manometric reading of verification, Δ c of automatically extrapolating in step 603
ifor sequence number in step II is i# by the measuring error data of verification tensimeter (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210367197.3A CN102840948B (en) | 2012-09-28 | 2012-09-28 | Batch calibration equipment and batch calibration method for intelligent pointer-type pressure gages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210367197.3A CN102840948B (en) | 2012-09-28 | 2012-09-28 | Batch calibration equipment and batch calibration method for intelligent pointer-type pressure gages |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102840948A CN102840948A (en) | 2012-12-26 |
| CN102840948B true CN102840948B (en) | 2014-02-12 |
Family
ID=47368513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210367197.3A Expired - Fee Related CN102840948B (en) | 2012-09-28 | 2012-09-28 | Batch calibration equipment and batch calibration method for intelligent pointer-type pressure gages |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102840948B (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103116753B (en) * | 2013-03-11 | 2014-03-12 | 杭州山科电子技术开发有限公司 | Collecting method and device of meter reading |
| CN105172192B (en) * | 2014-06-09 | 2017-08-25 | 宁波江丰电子材料股份有限公司 | Hot isostatic press pressure monitoring method and device |
| CN105092151A (en) * | 2015-06-23 | 2015-11-25 | 南车戚墅堰机车有限公司 | Pneumatic instrument detection table |
| CN105809151B (en) * | 2016-04-01 | 2020-04-28 | 中国电子科技集团公司第三十八研究所 | Image recognition method for state of pressure gauge of fire extinguisher |
| CN105955011B (en) * | 2016-04-21 | 2019-12-24 | 深圳欧德蒙科技有限公司 | Intelligent timing method and device |
| CN106482895A (en) * | 2016-11-08 | 2017-03-08 | 黄伟 | A kind of checker of automatic inspection pressure vacuum gauge |
| CN108827147B (en) * | 2017-05-18 | 2020-06-26 | 金钱猫科技股份有限公司 | Image measuring method and system based on rapid calibration |
| WO2019011353A1 (en) * | 2017-07-14 | 2019-01-17 | 北京康斯特仪表科技股份有限公司 | Pressure calibration apparatus and pressure instrument calibration information processing method |
| CN109253837B (en) * | 2017-07-14 | 2020-06-05 | 北京康斯特仪表科技股份有限公司 | Pressure calibration device and processing method of pressure instrument calibration information |
| CN107727313A (en) * | 2017-10-13 | 2018-02-23 | 郑显锋 | Automate pressure transmitter batch measurements verification system and method |
| CN108120553A (en) * | 2017-12-15 | 2018-06-05 | 芜湖致通汽车电子有限公司 | A kind of pressure sensor detecting system |
| CN111811732A (en) * | 2019-04-12 | 2020-10-23 | 北京振兴计量测试研究所 | Pressure gauge calibrating device and calibrating method |
| CN110763398A (en) * | 2019-10-14 | 2020-02-07 | 湖南省计量检测研究院 | Correction method of empty box barometer |
| CN112906681A (en) * | 2019-12-04 | 2021-06-04 | 杭州海康威视数字技术股份有限公司 | Meter reading method and device, electronic equipment and storage medium |
| CN112052745B (en) * | 2020-08-13 | 2021-11-26 | 飞亚达精密科技股份有限公司 | Visual test method and system for judging whether watch time-travelling precision is qualified or not |
| CN112051003B (en) * | 2020-09-10 | 2021-09-14 | 中国科学院自动化研究所 | Automatic product detection device, detection method and reading method for hydraulic meter |
| CN112197903B (en) * | 2020-10-28 | 2021-11-23 | 深圳市海科船舶工程有限公司 | Boats and ships atmospheric pressure table calibration equipment |
| CN112710425A (en) * | 2020-12-18 | 2021-04-27 | 哈尔滨华云泰科传感技术有限公司 | Calibration system and calibration method for batch production of air pressure sensors |
| CN113375860A (en) * | 2021-07-26 | 2021-09-10 | 安徽中烟工业有限责任公司 | Self-correcting method for pressure sensor calibration mode |
| CN113792727A (en) * | 2021-07-30 | 2021-12-14 | 华能大理风力发电有限公司 | Reading estimation method, device and system based on pointer instrument video image |
| CN113984279B (en) * | 2021-10-31 | 2023-01-31 | 西安汉唐分析检测有限公司 | Batch full-automatic calibration method for pointer type pressure gauges |
| CN117213717B (en) * | 2023-11-09 | 2024-01-30 | 江苏省计量科学研究院(江苏省能源计量数据中心) | Online metering system and method for pressure gauge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004205322A (en) * | 2002-12-25 | 2004-07-22 | Yazaki Corp | Display for vehicle |
| CN101403632A (en) * | 2008-11-13 | 2009-04-08 | 中国石化江汉油田分公司江汉采油厂 | Dynamic multipath synchronization detection apparatus and method for metering device |
| CN102539068A (en) * | 2011-12-20 | 2012-07-04 | 西安近代化学研究所 | Device and method for automatically measuring and interpreting pressure of plastic pressure-measurement sensitive element |
-
2012
- 2012-09-28 CN CN201210367197.3A patent/CN102840948B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004205322A (en) * | 2002-12-25 | 2004-07-22 | Yazaki Corp | Display for vehicle |
| CN101403632A (en) * | 2008-11-13 | 2009-04-08 | 中国石化江汉油田分公司江汉采油厂 | Dynamic multipath synchronization detection apparatus and method for metering device |
| CN102539068A (en) * | 2011-12-20 | 2012-07-04 | 西安近代化学研究所 | Device and method for automatically measuring and interpreting pressure of plastic pressure-measurement sensitive element |
Non-Patent Citations (4)
| Title |
|---|
| 《基于计算机视觉的电测仪表自动识别方法的研究》;赵书涛等;《仪器仪表学报》;20040831;第25卷(第4期);全文 * |
| 《移动式水表在线校准系统研制》;候庆强;《中国计量学院硕士学位论文》;20120630;全文 * |
| 候庆强.《移动式水表在线校准系统研制》.《中国计量学院硕士学位论文》.2012, |
| 赵书涛等.《基于计算机视觉的电测仪表自动识别方法的研究》.《仪器仪表学报》.2004,第25卷(第4期), |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102840948A (en) | 2012-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102840948B (en) | Batch calibration equipment and batch calibration method for intelligent pointer-type pressure gages | |
| CN106127771B (en) | Tunnel orthography system and method is obtained based on laser radar LIDAR point cloud datas | |
| CN100476345C (en) | Method for measuring geometric parameters of spatial circle based on technique of binocular stereoscopic vision | |
| CN101581569B (en) | Calibrating method of structural parameters of binocular visual sensing system | |
| CN102147281B (en) | Machine-vision based liquid level detection device and method | |
| CN109000582A (en) | Scan method and system, storage medium, the equipment of tracking mode three-dimensional scanner | |
| CN104132613B (en) | Noncontact optical volume measurement method for complex-surface and irregular objects | |
| CN100458359C (en) | Small-displacement measuring system in long-distance plane | |
| CN107576281B (en) | A kind of method and apparatus of measurement pipe bend bilge radius | |
| CN110017773A (en) | A kind of package volume measuring method based on machine vision | |
| CN103615980B (en) | Method and system for measuring parameters of round holes in plate | |
| CN104655011B (en) | A kind of noncontact optical measurement method of irregular convex surface object volume | |
| CN103411553A (en) | Fast calibration method of multiple line structured light visual sensor | |
| CN102749047B (en) | Measuring method for size of roll bearing block | |
| CN105157609A (en) | Two-sets-of-camera-based global morphology measurement method of large parts | |
| CN201522266U (en) | Computer-based binocular vision false-tooth scanning device | |
| CN102410811A (en) | Method and system for measuring parameters of bent pipe | |
| CN109544628A (en) | A kind of the accurate reading identifying system and method for pointer instrument | |
| CN110084849A (en) | Has the logistics system of automatic measurement volume and weight | |
| CN105181082A (en) | Liquid level detection method and liquid level detection device based on visible laser and image processing | |
| CN103196370A (en) | Measuring method and measuring device of conduit connector space pose parameters | |
| CN111260720A (en) | Target height measuring system based on deep learning method | |
| CN103217100A (en) | Online binocular vision measurement device for carriage of large bus | |
| CN102778207A (en) | Measurement method, device and system for stress and strain of structural part | |
| CN104616348A (en) | Method for reconstructing fabric appearance based on multi-view stereo vision |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140212 Termination date: 20180928 |