Instrument pointer automatic detection identification method and automatic reading method

An instrument pointer, automatic detection technology, applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve the problems such as the inability to practically apply real-time detection systems, the large amount of Hough transform calculation, and the detection is susceptible to noise interference, and achieve detection and identification results. Accurate and reliable, saving manpower and material resources, avoiding human error and visual error

Inactive Publication Date: 2005-11-09
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

It takes 2 to 3 hours to test a multi-range meter (not including data processing), and the testers are exhausted
Most of the intelligent methods studied in recent years use Hough transform for detection, but Hough transform has a large amount of calculation, large storage capacity, low detection accuracy, and detection is easily disturbed by noise, so it cannot be practically applied to real-time detection systems

Method used

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  • Instrument pointer automatic detection identification method and automatic reading method
  • Instrument pointer automatic detection identification method and automatic reading method
  • Instrument pointer automatic detection identification method and automatic reading method

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the accompanying drawings.

[0049] Implement a kind of hardware device block diagram of the present invention as attached figure 1 As shown, it includes a microcomputer 1, a camera 2, a storage device 3, and a printer 4. The camera 2, the storage device 3, and the printer 4 are connected to the microcomputer 1 respectively, and the camera 2 is controlled by the microcomputer 1 to collect instrument images in real time. The collected pointer instrument image is preprocessed, and then the center point position of an instrument pointer is determined through two Hough transformations. Finally, according to the center projection of the calculation instrument image, the peak value in the center projection is used to find the pointer position of the instrument.

[0050] The present invention utilizes the high-resolution camera 2 to carry out high-precision image acquisition, and can perform higher-preci...

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Abstract

The invention discloses a gange pointer automatic measuring identification method and reading method that includes gange image collection, pre-process of the gange image, taking pointer origin detecting using Hough conversion, detecting and identifying the gange pointer location by calculating the central projection point of the gange; then reading the value on the base of detecting and identification pointer location. The invention could automatically detecting and identifying the gange pointer and can conquer the human factor error and visual error when checking the gange by human eye. It has the advantage of high speed calculating, high accuracy identifying, low effect of human factor and convenience to take automatic information process.

Description

technical field [0001] The invention belongs to the image processing and recognition technology in the field of computer application technology, and in particular relates to an automatic detection and recognition method and an automatic reading method of an instrument pointer. technical background [0002] At present, all kinds of analog indication (pointer type) standard AC and DC meters above level 0.5 play a very important role in power measurement. Still widely used. For decades, my country's electrical measurement industry has generally adopted a heavy manual instrument verification method to calibrate the instrument, which requires human hands to touch the switch to control the power output. It takes 2 to 3 hours to detect a multi-range instrument (not including data processing), and the verification personnel are exhausted. Using manual operation to check the meter has high work intensity, low efficiency, human error, low degree of automatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D18/00
Inventor 金连文陈彬
Owner SOUTH CHINA UNIV OF TECH
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