Automatic calibration system and automatic calibration method of pointer instrument
An automatic calibration and pointer-type technology, applied in the direction of instruments, etc., can solve problems such as irregular operation, damage to calibration meters, poor repeatability, etc., to achieve the effect of convenient query and avoiding errors
Inactive Publication Date: 2014-02-26
STATE GRID CORP OF CHINA +1
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Problems solved by technology
The uncertainty of human factors, such as visual error and visual fatigue, will cause problems such as low degree accuracy and poor repeatability; irregular operations during the calibration process, such as adjusting the readings without permission, will cause artificial damage to the calibration meter; Enterprises, institutions and scientific research institutes that use pointer instruments need to set up calibration personnel, which increases management costs
Method used
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Embodiment
[0056] 1. The program-controlled DC power source CL6019 in the three-phase AC-DC instrument verification device CL3601B outputs the current reference value to the standard meter CL311V2 and the tested meter AC-DC ammeter T30, and the reading of the standard meter CL311V2 is transmitted to the host computer through the RS485 bus as the actual value .
[0057] 2. The electric pan / tilt moves the integrated camera SCZ-2250PD to the designated position, and the SCZ-2250PD collects images in the observation area.
[0058] 3. Upload the collected data to the host computer through the RS485 bus.
[0059]4. After the host computer receives the uploaded images of each collection area, it performs preprocessing such as image change, enhancement, filtering, threshold segmentation, binarization, expansion and thinning on each image, and then performs image registration, positioning and Stitching algorithms and fusion algorithms such as transition zone fusion, and identify the scale, scale...
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The invention relates to an automatic calibration system and an automatic calibration method of a pointer instrument. The system comprises a camera, an electric holder, a bus, a memory, a test power supply, a standard meter and a host computer, wherein the test power supply, the standard meter, the bus, the host computer and the memory are sequentially connected; the electric holder, the camera, the bus, the host computer and the memory are sequentially connected. The method comprises: firstly, the test power supply outputs a calibrated value to the standard meter and a calibrated pointer instrument; secondly, a practical value is read and transmitted to the host computer; thirdly, the camera is moved to an appointed position and is used for acquiring data; fourthly, data are acquired and are subsequently uploaded to the host computer; fifthly, the host computer receives the acquired data and processes to recognize the data; sixthly, the recognition result is compared with the practical valve; finally, the comparison result and the acquired images are simultaneously displayed and stored in the host computer. By adopting the automatic calibration system, calibration is achieved, and methods are provided for various pointer instruments for automatic calibration.
Description
technical field [0001] The invention belongs to the calibration technology of pointer meters, and in particular relates to an automatic calibration system and method for pointer meters. Background technique [0002] A pointer meter is a device that uses the position of the pointer to indicate the measurement result. Although digital instruments are widely used at present, pointer instruments have the advantages of simple structure, convenient maintenance, no electromagnetic field interference, high reliability, and low price. They are used in industrial, civil and military fields such as power systems, pneumatic systems, and hydraulic systems still has wide application. [0003] There are many disadvantages in adopting the traditional manual calibration method for pointer instruments. The uncertainty of human factors, such as visual error and visual fatigue, will cause problems such as low degree accuracy and poor repeatability; irregular operations during the calibration ...
Claims
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Inventor 林繁涛卢达李华赵莎白静芬陈松方宋晓卉曾彦超王丽莎王猛白璋
Owner STATE GRID CORP OF CHINA