Direct-reading instrument full-automatic verification method and device thereof

A technology of direct-reading instruments and verification devices, applied in the field of measuring instruments, can solve the problems of inability to achieve automatic verification, reducing system reliability, increasing device operation and maintenance workload, etc.

Inactive Publication Date: 2007-09-12
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Abstract
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Problems solved by technology

In the "full-automatic meter calibration" device using the "photoelectric identification system", the relative position of the "photoelectric converter" and the instrument dial and pointer is required to be accurate, otherwise a large error will be caused, and at the same time, the mechanical movement of the "photoelectric converter" Complicated operation increases the workload of device operation and maintenance, and also reduces the reliability of the system
The "photoelectric identification system" has not fundamentally solved the problem of identification of instrument pointers and scales, nor can it achieve a true full-automatic calibration

Method used

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  • Direct-reading instrument full-automatic verification method and device thereof
  • Direct-reading instrument full-automatic verification method and device thereof
  • Direct-reading instrument full-automatic verification method and device thereof

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Embodiment Construction

[0009] The following is a further description of the steps of the direct-reading meter automatic verification method in conjunction with Figure-1 and Figure-3. This method and device uses the computer (4) as the verification control center of the verification device. The first step in the verification of the meter is to ask the computer Enter the type of the instrument being verified, and the computer will query the relevant information of the instrument being verified from the database according to the instrument type. The second step is to adjust the positions of the camera (13) and the instrument to be verified, collect images of the standard template (19), and calibrate the internal and external parameters of the camera. The third step, start to check the meter, control the measurement standard current source (9), standard voltage source (10) to output the standard electric quantity, the size is consistent with the specific graduation line of the tested instrument, and the tes...

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Abstract

This invention discloses automatic examining method and device of direct reading instrument. New method uses computer vision theory, information processing technique, digital wave form synthesis technique and design principle of intelligent instrument, solves the most key problem of automatically interpreting direct number of examined instrument in process of examining instrument, proposes using computer as examining control center of assay device, automatically processes instrument examining, design a assay device to implement this method, implements automation of reading number of electricity measuring instrument, program control standard source control, error analysis and examining report forms output. Method used by this invention is suitable to examine every kinds of electricity measuring instrument.

Description

Technical field [0001] The invention belongs to the technical field of measuring instruments, and particularly relates to a verification method and device for electrical measuring instruments. Background technique [0002] Instrument verification is a task that requires high accuracy. At present, the verification methods of direct-reading instruments can be divided into two categories, one is the "standard meter method", which uses manual reading of the standard meter and the display of the meter being verified The measurement range is continuously adjusted by manually adjusting the power supply used for calibration. This method, due to the large range of the meter and the different scale characteristics of the ruler, the calibration depends on staring, manual adjustment, handwriting, and human calculation, which is not only labor-intensive, but also work The efficiency is low, and the error of the verification result is often affected by human factors. [0003] The second catego...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00G01D18/00
Inventor 赵书涛李宝树禹成七班福厚孙咏梅
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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