CN113686375B - Automatic verification method for digital meter - Google Patents
Automatic verification method for digital meter Download PDFInfo
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- CN113686375B CN113686375B CN202111108197.7A CN202111108197A CN113686375B CN 113686375 B CN113686375 B CN 113686375B CN 202111108197 A CN202111108197 A CN 202111108197A CN 113686375 B CN113686375 B CN 113686375B
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- 238000012795 verification Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 238000013459 approach Methods 0.000 claims abstract description 4
- 241001422033 Thestylus Species 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000003556 assay Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention relates to an automatic verification method of a digital meter, wherein a camera shoots a test bench, and after the digital meter is found, a mechanical arm grabs a meter pen at a preset position to approach the digital meter; the camera shoots pictures of the manipulator approaching to the digital table, the pictures are shot at different moments of the same height, and the corresponding relation between the pixels and the actual size is calculated; according to the shot pictures, identifying target positions on the digital table by the images, and calculating walking routes from the central point of the digital table to the horizontal plane of each target position; the mechanical arm walks to the position right above the digital meter, and the distance measuring sensor measures the distance from the mechanical arm to the digital meter; sequentially carrying out project verification; the camera shoots screen data displayed by the digital table identification digital table and calculates; and comparing the standard data to generate an assay result. According to the invention, the manual detection process is replaced by an automatic verification mode, so that the detection working efficiency can be effectively improved, the false detection rate is reduced, and the accuracy and unity of magnitude transmission are ensured.
Description
Technical Field
The invention relates to the technical field of digital meter verification, in particular to an automatic digital meter verification method.
Background
The digital meter is a very common electronic measuring instrument, has wide application in scientific research experiments, has a large number of digital meters to be detected by all levels of metering departments at present, has manual testing, manual recording and manual calculation of test data, complex operation and extremely low efficiency, is time-consuming and labor-consuming after-the-fact data processing and certificate issuing, is easy to cause misjudgment, missed judgment and the like caused by human factors, is difficult to ensure the accuracy and unification of magnitude transmission, and influences the smooth progress of scientific research and test tasks.
Disclosure of Invention
The invention aims to solve the technical problems that: the automatic verification method for the digital meter can be used for rapidly and conveniently verifying the digital meter.
The technical scheme adopted for solving the technical problems is as follows: an automatic verification method for a digital meter comprises the following steps,
s1, a camera shoots a test bench, and after a digital meter is found, a mechanical arm grabs a meter pen at a preset position and approaches the digital meter;
s2, the camera shoots pictures of the manipulator approaching to the digital meter, the pictures are shot at different moments in the same height, and the corresponding relation between the pixels and the actual size is calculated;
s3, identifying target positions on the digital table according to the shot pictures, and calculating walking routes from the central point of the digital table to the horizontal plane of each target position;
s4, when the manipulator walks to the position right above the digital meter, the distance measuring sensor measures the distance from the manipulator to the digital meter;
s5, sequentially inserting a meter pen, rotating a mechanical gear and pressing a button to select verification items;
s6, the camera shoots screen data displayed by the digital table identification digital table and calculates the screen data;
s7, comparing the standard data to generate an examination result.
Further, in step S2 of the present invention, when the manipulator completely enters the view field of the camera for the first time, the camera shoots the top view of the manipulator and the digital meter; the manipulator walks a distance on the X axle, and the camera shoots the top view of manipulator and digital table again.
Still further, in step S3 of the present invention, an actual travel route of the manipulator from the center point of the digital table to the horizontal plane of each target position is calculated from the pixel coordinates of each target position and the correspondence between the pixels calculated in step S2 and the actual dimensions.
In a further step S4, when the manipulator walks right above the digital meter, the distance measuring sensor mounted at the end of the manipulator measures the vertical distance from the end of the manipulator to the digital meter; and calculating the vertical distance from the head of the stylus to the central point of the digital meter according to the known distance from the tail end of the fixed manipulator to the grabbing operation device and the length and the position of the stylus grabbed by the grabbing operation device.
In still further step S6, the standard device outputs a standard signal to the digital table, the digital table display screen displays data, the camera shoots the digital table display screen, and the image recognition extracts key features to calculate the data on the digital table.
The invention has the beneficial effects that the defects in the background technology are overcome, the manual detection process is replaced by an automatic verification mode, the detection working efficiency can be effectively improved, the false detection rate is reduced, and the accuracy and unity of magnitude transmission are ensured.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
Fig. 2-1 and 2-2 are schematic top views of a camera shooting robot approaching a digital watch.
Wherein, rectangle represents the digital table, and the circle represents the manipulator.
FIG. 3 is a schematic diagram of a digital table identifying a target location.
Detailed Description
The invention will now be described in further detail with reference to the drawings and a preferred embodiment. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
An automatic verification method for a digital meter as shown in fig. 1 comprises the following steps:
1. after the digital meter is found, the mechanical arm grabs the meter pen at a preset position to approach the digital meter.
After the digital meter is found, the tail end of the manipulator is close to the digital meter after the digital meter is captured by the camera shooting inspection bench at a preset position by the distance capturing operation device.
2. And the camera shoots pictures of the manipulator approaching to the digital table, shoots pictures at different moments of the same height, and calculates the corresponding relation between the pixels and the actual size.
Fig. 2-1 is a top view of the camera shooting the manipulator and the digital meter when the manipulator first completely enters the camera view, the manipulator walks 8cm on the X-axis, and the camera shoots the top view of the manipulator and the digital meter again, as shown in fig. 2-2. The pixel sizes of the pictures in fig. 2-1 and fig. 2-2 are 1920×1080 pixels, and the comparison of the two pictures shows that the pixel position of the manipulator in the pictures changes from (320,960) to (640,900), that is, the pixel difference on the X-axis is 320 pixels (640-320=320 pixels), and then 1 pixel=0.025 cm (8/320=0.025) can be calculated.
3. Based on the picture taken in step 2, the image identifies the target location on the digital table, including: jack, mechanical gear, button, and calculate the walking route from the central point of the digital meter to the horizontal plane of each target position.
2-2 shot in the step 2, after the images of the digital meter are identified, jack K1, jack K2, mechanical gear K3 and button K4 are respectively obtained, pixel coordinates K1 (840, 405), K2 (1080,405), K3 (960, 540) and K4 (840,675) in the picture, the center point coordinates of the picture are (960,540), and the actual walking route from the center point of the digital meter to the horizontal plane of the jack K1 of the manipulator can be calculated according to the pixel coordinates of each target position and the corresponding relation between the pixels and the actual size calculated in the step 2, namely, the manipulator walks 5.25cm ((960-840) 0.025=3 cm) along the X axial direction from the center point of the digital meter, then walks 9cm ((540-405) 0.025=3.375 cm) along the Y axial direction, namely, the walking route from the center point to the jack K2, mechanical gear K3 and button K4 can be obtained in the same way.
4. When the manipulator walks right above the digital meter, the distance measuring sensor measures the distance from the manipulator to the digital meter.
When the manipulator walks to the position right above the digital meter, the distance measuring sensor arranged at the tail end of the manipulator measures that the vertical distance from the tail end of the manipulator to the digital meter is 11cm, the distance from the tail end of the manipulator to the grabbing operation device, the length and the position of the pen grabbed by the grabbing operation device are known to be fixed, and then the vertical distance from the head of the pen to the central point of the digital meter is finally calculated to be 10cm.
5. And sequentially inserting a meter pen, rotating a mechanical gear and pressing a button to select verification items.
And (3) integrating the walking route from the central point of the digital meter obtained in the step (3) to the horizontal plane of each target position and the vertical distance from the head of the meter pen obtained in the step (4) to the central point of the digital meter, wherein the grabbing operation device arranged at the tail end of the manipulator can insert the grabbed meter pen into a digital meter jack, then rotate a mechanical gear and press a button to select a verification item for verification.
6. The camera takes a digital table and recognizes screen data.
And 5, after the grabbing operation device on the manipulator sequentially performs actions such as pen insertion, gear rotation, button pressing and the like, selecting verification items, outputting standard signals to the digital table by the standard device, displaying data on a display screen of the digital table, shooting the display screen of the digital table by the camera, and calculating the data on the digital table by image recognition and extraction of key features.
7. And comparing the standard data to generate an assay result.
And (3) comparing the reading of the digital meter obtained in the step (6) with standard data to generate a verification result, and automatically verifying the digital meter.
The foregoing description is merely illustrative of specific embodiments of the invention, and the invention is not limited to the details shown, since modifications and variations of the foregoing embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (1)
1. An automatic verification method for a digital meter is characterized by comprising the following steps of: comprises the steps of,
s1, a camera shoots a test bench, and after a digital meter is found, a mechanical arm grabs a meter pen at a preset position and approaches the digital meter;
s2, the camera shoots pictures of the manipulator approaching to the digital meter, the pictures are shot at different moments in the same height, and the corresponding relation between the pixels and the actual size is calculated; when the manipulator completely enters the view field of the camera for the first time, the camera shoots a top view of the manipulator and the digital meter; the manipulator walks a distance on the X axis, and the camera shoots the top view of the manipulator and the digital meter again;
s3, identifying target positions on the digital table according to the shot pictures, and calculating walking routes from the central point of the digital table to the horizontal plane of each target position; calculating the actual walking route of the manipulator from the central point of the digital table to the horizontal plane of each target position according to the pixel coordinates of each target position and the corresponding relation between the pixels and the actual size calculated in the step S2;
s4, when the manipulator walks to the position right above the digital meter, the distance measuring sensor measures the distance from the manipulator to the digital meter; when the manipulator walks to the position right above the digital meter, a distance measuring sensor arranged at the tail end of the manipulator measures the vertical distance from the tail end of the manipulator to the digital meter; calculating the vertical distance from the head of the stylus to the central point of the digital meter according to the known distance from the tail end of the fixed manipulator to the grabbing operation device and the length and the position of the stylus grabbed by the grabbing operation device;
s5, sequentially inserting a meter pen, rotating a mechanical gear and pressing a button to select verification items;
s6, the camera shoots screen data displayed by the digital table identification digital table and calculates the screen data; outputting standard signals to the digital table by a standard device, displaying data on a display screen of the digital table, shooting the display screen of the digital table by a camera, and calculating the data on the digital table by extracting key features through image recognition;
s7, comparing the standard data to generate an examination result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111108197.7A CN113686375B (en) | 2021-09-22 | 2021-09-22 | Automatic verification method for digital meter |
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| CN202111108197.7A CN113686375B (en) | 2021-09-22 | 2021-09-22 | Automatic verification method for digital meter |
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| CN112783076A (en) * | 2019-11-07 | 2021-05-11 | 东北大学秦皇岛分校 | Method and system for guiding manipulator positioning based on high-precision displacement sensor |
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2021
- 2021-09-22 CN CN202111108197.7A patent/CN113686375B/en active Active
Patent Citations (10)
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|---|---|---|---|---|
| CN101713819A (en) * | 2008-10-08 | 2010-05-26 | 鸿富锦精密工业（深圳）有限公司 | System and method for checking universal meter |
| CN105234943A (en) * | 2015-09-09 | 2016-01-13 | 大族激光科技产业集团股份有限公司 | Industrial robot demonstration device and method based on visual recognition |
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