CN1137370C - Image-type automatic calibrating instrument for micrometer gauge or dial gauge - Google Patents
Image-type automatic calibrating instrument for micrometer gauge or dial gauge Download PDFInfo
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- CN1137370C CN1137370C CNB011128062A CN01112806A CN1137370C CN 1137370 C CN1137370 C CN 1137370C CN B011128062 A CNB011128062 A CN B011128062A CN 01112806 A CN01112806 A CN 01112806A CN 1137370 C CN1137370 C CN 1137370C
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Abstract
The present invention relates to an image type automatic calibrating instrument for micrometer gauges or dial gauges, which comprises a reference measurement value system, a pointer indication value judging and reading system and a computer control part, wherein the reference measurement value system is composed of a drive motor, a driving mechanism, a precise guide way and a precise grating sensor; the pointer indication value judging and reading system is composed of a CCD camera and an illuminating light source. Reference measurement values and pointer indication values are simultaneously input into a computer to be processed for obtaining indication value error. A calibrated gauge is fixed on a work table by an automatic centering clamp; an elastic floating mechanism at the bottom of a gauge dial can ensure that the direction of the gauge dial of the calibrated gauge is perpendicular to the measurement line of the camera. The present invention has the advantages of reasonable structure and simple and feasible control, and is suitable for calibrating the indication values of various pointer type meters.
Description
The present invention relates to a kind of image-type automatic calibrating instrument for micrometer gauge or dial gauge, relate in particular to a kind of instrument that utilizes computer image processing technology automatic Verification clock gauge and dial gauge, belong to pointer instrument automatic Verification technical field.
Clock gauge and dial gauge are the most widely used conventional instruments in the mechanical industry.In instrument manufacturing enterprise and measurement verification department, need accurately examine and determine the clock gauge and the dial gauge error of indication, qualified to judge whether, this is the work that regular labour intensity is big.Traditional micrometer gauge or dial gauge calibration method is that to adopt the standard gauge block group of combination different length be the yardstick benchmark, or to adopt the high precision micrometer mechanism with scale be length standard, carries out readout by human eye then and comes clock gauge and dial gauge are examined and determine.For example, Zhang Zhongfang by Industry Corp., Shanghai Railway Bureau proposes the white submeter calibrating instrument of a kind of high precision clock gauge (number of patent application 86206585), the micrometer mechanism that employing has index plate and reading vernier caliper is a benchmark, and human eye meter reading dish reading is by relatively examining and determine.The problem that this calibration method exists is: 1. the precision of artificial visual reading is low, poor reliability, poor repeatability; 2. testing person's labour intensity is big, and the calibrating time is long, inefficiency; 3. the fixed point calibrating of extreme position can only be arranged, and dirigibility and versatility are poor; 4. hand computation efficient is low, and can only provide the single-point error amount, can't obtain the complete error curve.Begin to occur some automatic calibrators in recent years, " a kind of dial gauge automatic calibrator " (number of patent application 91222992.6) that proposes by people such as the old Longdes of Dalian University of Technology for example, with the video imaging of the dial gauge pointer that rotates to optical screen, when pointer image process sampling switch, the computer control grating sensor is sampled, and calculates the error of indication by data processing.The micrometer mechanism that employing has index plate and reading vernier caliper is a benchmark, and human eye meter reading dish reading is by relatively examining and determine.But it still exists tangible deficiency and defective: promptly detect pointer position by formation method and optoelectronic switch, its measuring accuracy is low, therefore can only satisfy the calibrating requirement of dial gauge.
The objective of the invention is to above-mentioned deficiency, propose a kind of new image-type automatic calibrating instrument for micrometer gauge or dial gauge, realize the High Precision Automatic calibrating of micrometer gauge or dial gauge, satisfy actual production and measurement verification demand at prior art.
For realizing such purpose, the present invention is in technical scheme, the calibrating instrument of design comprises datum quantity valve system, pointer indicating value interpreting system and three ingredients of computer control system, under computer control, move by the continuous measuring staff that promotes tested table of datum quantity valve system, its mobile displacement adopts high-precision grating sensor to detect, adopt the readout of ccd video camera and the tested list index of image measurement technology interpretation simultaneously, obtain the error of indication of tested table by Computer Processing.
Datum quantity valve system of the present invention is composed in series by drive motor, gear train, precise grating, tested table is fixed on the worktable by special anchor clamps, drive motor moves by the measuring staff that gear train and precise guide rail promote tested table under the control of computing machine, and the size of amount of movement is detected by high-precision grating sensor.Ccd video camera absorbs tested table dial plate image, obtains the indicating value of pointer by Flame Image Process.Pointer indicating value and measuring staff displacement are imported computing machine simultaneously, by calculating error of indication certified value.Qualification result and graph of errors can show on display, also can export by printer prints.All testing process is finished under the control of computing machine automatically.Test table is equipped with special-purpose automatically centering fixture, and tested table is fixed on the test table by unit clamp, can guarantee that tested table measuring staff is concentric with guide rail.Different tested tables can be selected different anchor clamps installations and fixing for use.Tested table dial plate below is equipped with the elastic floating adjusting mechanism, can make dial plate vertical with the video camera slotted line, thereby guarantees accurately to measure.
For understanding technical scheme of the present invention better, describe in further detail below in conjunction with accompanying drawing.
Fig. 1 is that system of the present invention constitutes synoptic diagram.
As shown in Figure 1, tested table 3 is fixed on the worktable 5 by special automatically centering fixture 6, and the dial plate bottom connection that elastic floating mechanism 4 and tested table 3 are installed on test table 5 touches.Ccd video camera 1 and lighting source 2 are installed above the dial plate of tested table 3, and video camera 1 is over against the dial plate center of tested table 3.Drive motor 10, gear train 9 and precise guide rail 7 are connected in series, and corresponding with the measuring staff position of tested table 3.Precise grating sensor 8 is installed on precise guide rail 7.
The course of work is as follows: at first under the control of computing machine, drive motor 10 promotes precise guide rail 7 by gear train 9 and moves, until contacting with the measuring staff of tested table 3.Under computer control, drive motor 10 turns round continuously then, and the measuring staff that promotes tested table 3 by gear train 9 and precise guide rail 7 moves.The displacement of measuring staff has precise grating sensor 8 to detect in real time and sends in the computing machine, meanwhile, the dial plate image of 1 pair of tested table 3 of ccd video camera carries out continuous sampling, view data is sent into computing machine by image card and is handled, by calculating the indicating value of tested list index, obtain the error of indication of tested table at last.Measurement result is shown on the display with text mode and graphics mode, and can store simultaneously and print.After measuring staff reached maximum range, drive motor 10 is antiport under computer control, and measuring instrument carries out the verification process of revesal.Whole testing process is to finish under the control of computing machine fully, so measuring instrument has higher robotization and intelligent degree.
Fig. 2 is frame for movement schematic diagram of the present invention.
As shown in Figure 2, tested table 3 is fixed on the workbench 5 by Special Automatic centralizer 6, can protect Card dial plate center is correct. Below tested table dial plate, elastic floating mechanism 4 is installed, and with tested table 3 The dial plate bottom connection touch, to guarantee that dial plate is vertical with the video camera slotted line. The datum quantity valve system adopts motor 10 is drive source, and the driving shaft of drive motors 10 links to each other with transmission mechanism 9 by elasticity connecting shaft knot 15. Pass Actuation mechanism 9 changes rotatablely moving of motor into rectilinear motion, and the guide rod 13 of promotion precise guide rail 7 moves. Guide rod 13 is relative with the measuring staff of tested table, when guide rod 13 with after the measuring staff of tested table contacts, drive motors 10 just can directly drive measuring staff moves. In precise guide rail 7 grating sensor 8 is installed, is used for measuring The displacement of guide rod. In guide rod 13 1 sides spring 14 is installed, is used for eliminating mechanic transmission clearance.
Ccd video camera 1 and lighting source 2 are installed, video camera 1, mirror above the dial plate of tested table 3 11 and lighting source 2 be fixed on the support 12, video camera 1 and camera lens 11 are over against the dial plate of tested table 3 The center, reliable to guarantee picked-up dial plate image stabilization.
Drive motor 10 drives the computer control that is subjected to system, thereby realizes the verification process full automation.When guide rod 13 did not contact with tested table measuring staff, 10 fast turn-arounds of computer control drive motor realized that the quick-speed large-scale of guide rod moves.When guide rod 13 with after tested table measuring staff contacts, the 10 low speed steady runnings of computer control drive motor realize the pointer uniform rotation of tested table 3, guarantee the indicating value measuring accuracy.When tested express range after, computer control drive motor 10 antiports are realized the revesal calibrating.
The tested list index indicating value variable quantity that produces under guide rod promotes is detected by high accuracy CCD camera 1.Under the irradiation of lighting source 2, the dial plate image of tested table 3 is imaged onto on the CCD image planes of video camera by special-purpose optical lens 11.After drive motor 10 promoted measuring staffs through gear trains 9 and precise guide rail 7 and moves, video camera by Flame Image Process and calculating, finally obtained the pointer indicating value with the image of the tested table dial plate of continuous sampling.
When changing the tested table 3 of different size, can select for use different anchor clamps 6 to realize calibrating, so the adaptability of this calibrating instrument is very strong.
It is datum quantity valve system power source that the present invention adopts drive motor, and moving process is subjected to the computer control of system, can realize continuous detecting and verification process robotization, improves detection efficiency greatly, and the calibrating scope can arbitrarily adjust, flexible; Provide the measurement length standard by precise grating, guaranteed discharge benchmark value accurately and stable.Adopt image measurement technology to realize the accurate interpretation of pointer indicating value, improve calibration accuracy and accuracy.The present invention is rational in infrastructure, controls simple possible, is applicable to the value testing of various pointer instruments, for example clock gauge, dial gauge, lever meter, torsion spring table etc.After being equipped with other datum quantity valve systems, can examine and determine different pointer instrument, for example voltage table, reometer, ohmmeter, power meter, tachometer gage or the like, thereby be with a wide range of applications.
Claims (3)
1, a kind of image-type automatic calibrating instrument for micrometer gauge or dial gauge, comprise lighting source (2), tested table (3), grating sensor (8), drive motor (10) and computer control part, it is characterized in that tested table (3) is fixed on the worktable (5) by automatically centering fixture (6), the elastic floating mechanism (4) of being equipped with on the worktable (5) touches with the dial plate bottom connection of tested table (3), drive motor in the datum quantity valve system (10), gear train (9) and precise guide rail (7) are connected in series, and it is corresponding with the measuring staff position of tested table (3), secret grating sensor (8) is installed on the precise guide rail (7), pointer indicating value interpreting system is made up of ccd video camera (1) and lighting source (2), camera lens (11) is above dial plate and over against the dial plate center of tested table (3), ccd video camera (1) is sampled to the figure of tested table dial plate, and pointer indicating value that obtains by Flame Image Process and benchmark value are imported computing machine simultaneously and handled.
2,, it is characterized in that the difference of the visual tested tables of said anchor clamps (6) (3) and select to change as the said image-type automatic calibrating instrument for micrometer gauge or dial gauge of claim 1.
3, as the said image-type automatic calibrating instrument for micrometer gauge or dial gauge of claim 1, it is characterized in that the guide rod (13) of precise guide rail (7) is relative with the measuring staff of tested table, guide rod (13) one sides are equipped with spring (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011128062A CN1137370C (en) | 2001-04-30 | 2001-04-30 | Image-type automatic calibrating instrument for micrometer gauge or dial gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011128062A CN1137370C (en) | 2001-04-30 | 2001-04-30 | Image-type automatic calibrating instrument for micrometer gauge or dial gauge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1313502A CN1313502A (en) | 2001-09-19 |
| CN1137370C true CN1137370C (en) | 2004-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011128062A Expired - Fee Related CN1137370C (en) | 2001-04-30 | 2001-04-30 | Image-type automatic calibrating instrument for micrometer gauge or dial gauge |
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| Country | Link |
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| CN (1) | CN1137370C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995268B (en) * | 2009-08-21 | 2014-02-19 | 鸿富锦精密工业（深圳）有限公司 | Measuring instrument indicating value error calculating system and method |
| CN103453813A (en) * | 2012-06-04 | 2013-12-18 | 张敏 | Micrometer correcting auxiliary device |
| CN104748675A (en) * | 2013-12-27 | 2015-07-01 | 连云港冠钰精密工业有限公司 | Video testing fixture |
| CN103900625B (en) * | 2014-03-19 | 2016-04-06 | 大连理工大学 | A kind of digital interface method and system of harmful influence pointer instrument |
| CN104654954B (en) * | 2015-01-20 | 2018-05-22 | 中国计量学院 | Vernier caliper calibrating installation |
| CN104677219A (en) * | 2015-03-24 | 2015-06-03 | 江南大学 | Automatic detection method and device for digital caliper |
| CN107388942A (en) * | 2016-05-17 | 2017-11-24 | 南京泓天仪器仪表有限公司 | A kind of architectural engineering detection rule for verticality calibrating installation |
| CN106568359A (en) * | 2016-10-28 | 2017-04-19 | 上海大学 | Automatic digital display dial indicator calibration system and automatic digital display dial indicator calibration method |
| CN111964624A (en) * | 2020-07-24 | 2020-11-20 | 中国航空工业集团公司济南特种结构研究所 | Method for improving reading accuracy of indicator verification instrument |
| CN114236179B (en) * | 2021-12-21 | 2023-12-01 | 江苏丰仪同创互联科技有限公司 | Tachometer verification device and automatic verification method based on image recognition technology |
| CN114264407B (en) * | 2021-12-29 | 2023-03-14 | 江南大学 | Method for detecting measurement accuracy of pointer type pressure gauge, computer medium and computer |
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2001
- 2001-04-30 CN CNB011128062A patent/CN1137370C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1313502A (en) | 2001-09-19 |
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