CN104048693A - A fully automatic pointer meter calibration system based on machine vision images - Google Patents
A fully automatic pointer meter calibration system based on machine vision images Download PDFInfo
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- CN104048693A CN104048693A CN201410229392.9A CN201410229392A CN104048693A CN 104048693 A CN104048693 A CN 104048693A CN 201410229392 A CN201410229392 A CN 201410229392A CN 104048693 A CN104048693 A CN 104048693A
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Abstract
The invention discloses a full-automatic pointer instrument checking system based on machine vision images, which comprises a pressure generator, a checking auxiliary device and a control device, wherein the pressure generator is connected with corresponding interfaces of the control device through data lines, the pressure generator is connected with the corresponding interfaces of the checking auxiliary device through a pressure pipeline, pressure generated by the pressure generator is transmitted to the checking auxiliary device through the pressure pipeline, the checking auxiliary device is used for loading a pointer instrument to be checked, the checking auxiliary device can apply the transmitted pressure to the pointer instrument to be checked and can simultaneously obtain an instrument image after the pointer instrument to be checked is pressurized, the control device is connected with the corresponding interfaces of the checking auxiliary device through the data lines, the control device can receive the instrument image obtained by the checking auxiliary device and further obtain the reading of the instrument according to the instrument image, to judge whether the detected pointer instrument is qualified under a certain pressure loading.
Description
Technical field
The present invention relates to pointer meters verification field, specifically refer to a kind of full-automatic pointer instrument check system based on machine vision image.
Background technology
At present, the verification of most of industry pointer meters all depends on human eye and reads, but artificial visually examine's readout precision is lower, and personnel labor intensity is large, inefficiency.For this problem, many companies have released pointer instrument automatic Verification product separately, and these products have been realized the automatic Verification of pointer instrument to a certain extent.Semi-automatic, the full automatic watch class somascope (as OPTIMARl00 semi-automatic watch class somascope and 875 full automatic watch class somascopes) of Marl, Germany (Mahr) company development, can realize fast indicating instrument, reliably, verification accurately.But it is semi-automatic that working method adopts, and expensive, be difficult to be accepted by demestic user.Domestic instrument automatic Verification research is started late, at present still in developing stage.The HB121H type pressure testers of Beijing Hang Weishuojie electronics corporation development, embedded pressure source, volume are little, simple in structure, but supercharging mode adopts manually, needs operator to have higher operative skill, can not realize full-automatic.The pointer meters verification product based on machine vision that Beijing Kang Site company produces, can only the lower pointer meters of checking precision, and automaticity is lower.
In sum, although there is both at home and abroad the application product of some pointer meters verifications, these products still need more man-machine interactively, fail to realize completely robotization.Therefore, in order to get rid of as much as possible human intervention, increase work efficiency, develop a kind of full-automatic pointer meters check system extremely urgent.
Summary of the invention
The object of this invention is to provide a kind of full-automatic pointer instrument check system based on machine vision image, this system realizes the full-automatic calibrating of pointer instrument, acquisition, higher than manual calibration accuracy, enhances productivity, reduces thereby reach the object that manpower is equipped with, reduces production costs.
This purpose of the present invention realizes by the following technical solutions: a kind of full-automatic pointer instrument check system based on machine vision image, it is characterized in that: this system comprises pressure generator, verification servicing unit and control device, wherein, pressure generator is connected by data line with the corresponding interface of control device, by control device, control, pressure generator is connected by pressure piping with the corresponding interface of verification servicing unit, the pressure that pressure generator produces is sent to verification servicing unit by described pressure piping, described verification servicing unit is used for loading tested pointer instrument, described verification servicing unit can impose on tested pointer instrument by the pressure sending, can obtain the Instrument image after tested pointer instrument pressurization simultaneously, described control device is connected by data line with the corresponding interface of verification servicing unit, described control device can be controlled the action of verification servicing unit, and can receive the Instrument image that verification servicing unit obtains, and then according to the reading of Instrument image acquisition instrument, judge that whether the tested pointer instrument under certain pressure loads is qualified, thereby realize the full-automatic verification of tested pointer instrument.
In the present invention, described verification servicing unit comprises worktable, bracing frame, lampshade, image acquisition sensor and secondary light source, described worktable level arranges, described bracing frame is vertically arranged on worktable, described lampshade is arranged on the top of bracing frame, the opening of lampshade is towards tested pointer instrument, described secondary light source is also fixed on bracing frame, and by lampshade surrounding ring cover, secondary light source is towards the opening of lampshade, the light that secondary light source is launched carries out projecting tested pointer instrument after diffuse reflection through the inside surface of lampshade, described image acquisition sensor is embedded in lampshade, and towards the opening of lampshade, the front end of described worktable is provided with two pressure interfaces that are connected, a pressure interface is for passing through described pressure piping Bonding pressure generator, another pressure interface is used for installing tested pointer instrument, to tested pointer instrument, exert pressure, described image acquisition sensor is connected with described control device respectively with secondary light source, by control device, controlled, described image acquisition sensor can obtain the Instrument image after tested pointer instrument pressurization, and send this Instrument image to described control device.
As improvement of the present invention: described verification servicing unit also comprises and rap mechanism, the described mechanism of rapping is arranged on worktable, is connected with control device, by control device, controls its action, raps mechanism for beaing the shell of tested pointer instrument.
In the present invention, described lampshade is semisphere cover.
In the present invention, described secondary light source is annular light source.
In the present invention, described control device comprises PLC plate and PC, PLC plate respectively with described pressure generator, image acquisition sensor, secondary light source, rapping mechanism is connected by the corresponding interface with PC, PLC plate is for controlled pressure generator, image acquisition sensor, secondary light source and rap mechanism action, and can receive the Instrument image that verification servicing unit obtains, the Instrument image of reception is transferred to PC, described PC is according to the reading that receives the Instrument image acquisition instrument of coming, whether the tested pointer instrument of judgement under certain pressure loads be qualified.
Compared with prior art, the present invention is simple in structure, cheap, can realize supercharging, intensity of illumination, and the full-automation of the regulative modes such as image acquisition sensor locus, reduces human capital, improves the calibrating efficiency of pointer instrument.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the use state reference map of check system of the present invention;
Fig. 2 is the use state reference map of verification servicing unit in check system of the present invention;
Fig. 3 is the one-piece construction schematic diagram of verification servicing unit in check system of the present invention.
Description of reference numerals
1, secondary light source, 2, image acquisition sensor, 3, bracing frame, 4, rap mechanism, 5, worktable, 6, stepper motor, 7, pressure interface, 8, pressure interface, 9, servicing unit control end, 10, lampshade, 11, PLC plate, 12, AVR single-chip microcomputer, 13, PC, 101, pressure generator, 102, control device, 103, verification servicing unit
Embodiment
A kind of full-automatic pointer instrument check system based on machine vision image as shown in Figure 1 to Figure 3, this system comprises pressure generator 101, verification servicing unit 103 and control device 102, wherein, pressure generator 101 is connected by data line with the corresponding interface of control device 102, by control device 102, control, pressure generator 101 is connected by pressure piping with the corresponding interface of verification servicing unit 103, the pressure that pressure generator 101 produces is sent to verification servicing unit 103 by pressure piping, verification servicing unit 103 is for loading tested pointer instrument, verification servicing unit 103 can impose on tested pointer instrument by the pressure sending, can obtain the Instrument image after tested pointer instrument pressurization simultaneously, control device 102 is connected by data line with the corresponding interface of verification servicing unit 103, control device 102 can be controlled 103 actions of verification servicing unit, and can receive the Instrument image that verification servicing unit 103 obtains, and then according to the reading of Instrument image acquisition instrument, judge that whether the tested pointer instrument under certain pressure loads is qualified, thereby realize the full-automatic verification of tested pointer instrument.
Described verification servicing unit 103 comprises worktable 5, bracing frame 3, lampshade 10, image acquisition sensor 2 and secondary light source 1, worktable 5 is horizontally disposed with, bracing frame 3 is vertically arranged on worktable 5, lampshade 10 is semisphere cover, lampshade 10 is arranged on the top of bracing frame 3, the opening of lampshade 10 is towards tested pointer instrument, secondary light source 1 is also fixed on bracing frame 3, and by lampshade 10 surrounding ring covers, secondary light source 1 is towards the opening of lampshade 10, secondary light source 1 is annular light source, the light that secondary light source 1 is launched carries out projecting tested pointer instrument after diffuse reflection through the inside surface of lampshade 10, image acquisition sensor 2 is embedded in lampshade 10, and towards the opening of lampshade 10, the front end of worktable 5 is provided with two pressure interfaces that are connected 7, 8, a pressure interface 7 is for passing through pressure piping Bonding pressure generator 101, another pressure interface 8 is for installing tested pointer instrument, to tested pointer instrument, exert pressure, image acquisition sensor 2 is connected with control device 102 respectively with secondary light source 1, by control device 102, controlled, image acquisition sensor 2 can obtain the Instrument image after tested pointer instrument pressurization, and send this Instrument image to control device 102.
This verification servicing unit 103 also comprises stepper motor 6 and raps mechanism 4, and stepper motor 6 is built in bracing frame 3, and the output terminal of stepper motor 6 is connected with image acquisition sensor 2 by screw mandrel, regulates the position of image acquisition sensor 2 by screw mandrel.
Described control device 102 comprises AVR single-chip microcomputer 12, PLC plate 11 and PC 13, wherein, AVR single-chip microcomputer 12 is connected by the corresponding interface with PC 13 with stepper motor 6 respectively, AVR single-chip microcomputer 12 is for 6 actions of control step motor, PLC plate 11 respectively with pressure generator 101, image acquisition sensor 2, secondary light source 1, rapping mechanism 4 is connected by the corresponding interface with PC 13, PLC plate 11 is for controlled pressure generator 101, image acquisition sensor 2, secondary light source 1 and rap mechanism's 4 actions, and can receive the Instrument image that verification servicing unit 103 obtains, the Instrument image of reception is transferred to PC 13, PC 13 is according to the reading that receives the Instrument image acquisition instrument of coming, whether the tested pointer instrument of judgement under certain pressure loads be qualified.
Stepper motor 6 in the present embodiment adopts ZD-6560-V3 high-performance stepper motor 6, the ConST736 that pressure generator 101 adopts Kang Site company to produce.Image acquisition sensor 2 adopts digital ccd video camera, and PLC is used the FXIN-14MR of Mitsubishi type PLC plate 11.
Image acquisition sensor 2 adopts digital ccd video camera, and its resolution should be taken into account and can obtain the image of high as far as possible pixel and the restriction of computer process ability, and possesses automatic focusing function, and its camera parameter and shooting action are controlled by PC 13.Video camera is arranged on bracing frame 3, the relative position by its control with dial plate.According to the size of worktable 5 (design size is no more than 600mm * 400mm) with the requirement of pictures taken is determined to the approximate distance of imageing sensor and pointer gauge, consider again the parameters such as focal length that pointer gauge dial plate diameter and reading perpendicularity require to determine imageing sensor, to guarantee that pointer gauge image is full of the requirement of absorbing picture and meeting vertical reading.
Secondary light source 1 carries out projecting tested pointer meters after diffuse reflection through the diffuse reflection surface of semisphere inner face, and the mirror-reflection probability of generation is down to minimum.Light source is furnished with light-source brightness and regulates, and system can automatically regulate light-source brightness to reach optimum collection effect before collection.
Bracing frame 3 is except being used for supporting image acquisition sensor 2 and secondary light source 1, also for regulating the locus of image acquisition sensor 2 and secondary light source 1, accurately to aim at target subject, regulate the size of target in image, and meet the requirement of system shape library.With respect to hard-wired tested table position, bracing frame 3 should at least can be realized front and back and upper and lower mobile adjusting.In bracing frame 3, establish small type stepping motor 6, to realize the program control adjusting of position.And bracing frame 3 should be able to carry out position adjustments according to feedback image automatically by system, to reach best pickup location and effect.
According to pressure calibration rules, during instrument calibration, before reading, need to rap meter case, the error of being brought to eliminate gauge internal transmission gear back lash.The present invention raps mechanism's 4 actions by control and simulates the artificial operation of rapping.The tup that raps mechanism 4 should adopt the flexible materials such as rubber, while avoiding rapping, instrument is caused damage.
Opertaing device need to carry out corresponding Software for Design, comprises that adjusting support frame 3 controls, raps that mechanism 4 controls, imageing sensor parameter is controlled, the reading and identifying of secondary light source 1 and meter reading.Wherein adjusting support frame 3 controls are mainly that AVR single-chip microcomputer 12 is write to corresponding program, by control step motor 6, drive the locus that regulates pick-up transducers and secondary light source 1, can be with reference to the programming of auto parts automated arm system.Reading with identification software of meter reading can be used for reference existing image acquisition and treatment technology.Rap mechanism's 4 controls and imageing sensor parameter and control, mainly, to PLC programming, in conjunction with AVR single-chip microcomputer 12, jointly realize the calibrating of robotization.Meanwhile, PC 13 should possess the function of automatic calibration Software for Design.
Before work of the present invention, operating personnel by PC 13 set corresponding imageing sensor, rap mechanism 4, the parameters of pressure generator 101 etc.During work, instrument is placed on worktable 5 by rules, and the present invention completes and raps successively, pressurization, light source regulates, image acquisition sensor 2 position adjustments, the identification of meter reading and the function such as read, and judge that whether instrument quality is qualified, saves the data on PC 13.
The above embodiment of the present invention is not limiting the scope of the present invention; embodiments of the present invention are not limited to this; all this kind is according to foregoing of the present invention; according to ordinary skill knowledge and the customary means of this area; do not departing under the above-mentioned basic fundamental thought of the present invention prerequisite; the modification of other various ways that said structure of the present invention is made, replacement or change, within all should dropping on protection scope of the present invention.
Claims (6)
1. the full-automatic pointer instrument check system based on machine vision image, it is characterized in that: this system comprises pressure generator, verification servicing unit and control device, wherein, pressure generator is connected by data line with the corresponding interface of control device, by control device, control, pressure generator is connected by pressure piping with the corresponding interface of verification servicing unit, the pressure that pressure generator produces is sent to verification servicing unit by described pressure piping, described verification servicing unit is used for loading tested pointer instrument, described verification servicing unit can impose on tested pointer instrument by the pressure sending, can obtain the Instrument image after tested pointer instrument pressurization simultaneously, described control device is connected by data line with the corresponding interface of verification servicing unit, described control device can be controlled the action of verification servicing unit, and can receive the Instrument image that verification servicing unit obtains, and then according to the reading of Instrument image acquisition instrument, judge that whether the tested pointer instrument under certain pressure loads is qualified, thereby realize the full-automatic verification of tested pointer instrument.
2. the full-automatic pointer instrument check system based on machine vision image according to claim 1, it is characterized in that: described verification servicing unit comprises worktable, bracing frame, lampshade, image acquisition sensor and secondary light source, described worktable level arranges, described bracing frame is vertically arranged on worktable, described lampshade is arranged on the top of bracing frame, the opening of lampshade is towards tested pointer instrument, described secondary light source is also fixed on bracing frame, and by lampshade surrounding ring cover, secondary light source is towards the opening of lampshade, the light that secondary light source is launched carries out projecting tested pointer instrument after diffuse reflection through the inside surface of lampshade, described image acquisition sensor is embedded in lampshade, and towards the opening of lampshade, the front end of described worktable is provided with two pressure interfaces that are connected, a pressure interface is for passing through described pressure piping Bonding pressure generator, another pressure interface is used for installing tested pointer instrument, to tested pointer instrument, exert pressure, described image acquisition sensor is connected with described control device respectively with secondary light source, by control device, controlled, described image acquisition sensor can obtain the Instrument image after tested pointer instrument pressurization, and send this Instrument image to described control device.
3. the full-automatic pointer instrument check system based on machine vision image according to claim 2, it is characterized in that: described verification servicing unit also comprises and raps mechanism, the described mechanism of rapping is arranged on worktable, be connected with control device, by control device, control its action, rap mechanism for beaing the shell of tested pointer instrument.
4. the full-automatic pointer instrument check system based on machine vision image according to claim 3, is characterized in that: described lampshade is semisphere cover.
5. the full-automatic pointer instrument check system based on machine vision image according to claim 3, is characterized in that: described secondary light source is annular light source.
6. according to the full-automatic pointer instrument check system based on machine vision image described in claim 3 to 5 any one, it is characterized in that: described control device comprises PLC plate and PC, PLC plate respectively with described pressure generator, image acquisition sensor, secondary light source, rapping mechanism is connected by the corresponding interface with PC, PLC plate is for controlled pressure generator, image acquisition sensor, secondary light source and rap mechanism action, and can receive the Instrument image that verification servicing unit obtains, the Instrument image of reception is transferred to PC, described PC is according to the reading that receives the Instrument image acquisition instrument of coming, whether the tested pointer instrument of judgement under certain pressure loads be qualified.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410229392.9A CN104048693A (en) | 2013-11-29 | 2014-05-27 | A fully automatic pointer meter calibration system based on machine vision images |
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| CN201320774543 | 2013-11-29 | ||
| CN201320774543.X | 2013-11-29 | ||
| CN201410229392.9A CN104048693A (en) | 2013-11-29 | 2014-05-27 | A fully automatic pointer meter calibration system based on machine vision images |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108507613A (en) * | 2018-03-27 | 2018-09-07 | 无锡先导智能装备股份有限公司 | One kind being based on CCD lugs/adhesive tape position detecting system and method |
| CN115660393A (en) * | 2022-10-20 | 2023-01-31 | 中海石油技术检测有限公司 | Intelligent detection production line for pressure instrument and detection method thereof |
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| CN201110769Y (en) * | 2007-11-22 | 2008-09-03 | 河南农业大学 | Pointer instrument automatic verification device |
| CN201476938U (en) * | 2009-02-25 | 2010-05-19 | 马俊杰 | Full-automatic pressure checking equipment of piston type pressure gauge |
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- 2014-05-27 CN CN201410229392.9A patent/CN104048693A/en active Pending
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| US20030204342A1 (en) * | 2002-04-29 | 2003-10-30 | Law William Q. | Measurement test instrument and associated voltage management system for accessory device |
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| CN201476938U (en) * | 2009-02-25 | 2010-05-19 | 马俊杰 | Full-automatic pressure checking equipment of piston type pressure gauge |
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Application publication date: 20140917 |