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Method and device for automatically reading pointer instrument by video frequency

A pointer-type, automatic technology, which is applied in the use of optical devices to transmit sensing components, instruments, characters, and pattern recognition. Insensitive to changes and less internal parameter settings

Active Publication Date: 2013-06-12
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Compared with the previous method, this method has a certain improvement, but this method can only be adapted to fixed monitoring points, and it is not robust to the search of the dial, especially to establish a cumbersome database, and the initial workload is very large

Method used

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  • Method and device for automatically reading pointer instrument by video frequency
  • Method and device for automatically reading pointer instrument by video frequency
  • Method and device for automatically reading pointer instrument by video frequency

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] figure 1 It is a flowchart of a method for automatically reading a pointer instrument by using video in the present invention, including:

[0024] S101: Calibrate the effective area of ​​the dial from the input image, obtain the start scale point and the end scale point, and record the start position scale value and the end position scale value;

[0025] S102: Detect all line segments in the effective area of ​​the dial;

[0026] S103: Set rule parameters, perform regular selection of detected line segments, and filter out meter pointers;

[0027] S104: According to the type of the dial, use a corresponding algorithm to read the scale pointed by the pointer of the instrument to obtain the reading.

[0028] The invention provides a simpler, more intellige...

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PUM

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Abstract

The invention discloses a method and a device for automatically reading a pointer instrument by video frequency. The method comprises the following steps of: obtaining an initial scale point and a stop scale point from an effective region of an input image calibration dial plate, and recording an initial position scale value and a stop position scale value; detecting all line segments within the effective region of the dial plate; setting rule parameters, selecting the detected line segments in a regularization way, and filtering out a meter needle; and reading the scale appointed by the meter needle by a corresponding algorithm according to the type of the dial plate, and obtaining the reading number. After the invention is adopted, a plurality of needle targets can be quickly and exactly detected, any pre-estimation treatments (such as colors, positions and the like of the needle dial plate) are not needed, and high in accuracy rate.

Description

technical field [0001] The invention relates to dial detection technology, in particular to a method and device for automatically reading pointer meters by using video. Background technique [0002] In the substation of the power system, instruments are widely used and play an important role in ensuring the safe operation of the system. Among them, there are a large number of pointer meters, and there has been no comprehensive method for remote collection of readings of pointer meters. . [0003] Existing technologies mainly include an instrument monitoring method based on object outlines, a pointer instrument reading method based on a scale lookup table, and the like. The basic scheme of the former method is that the computer at the main control end controls the inspection robot in the substation through the wireless local area network based on the remote meter detection / reading module with the circle / ellipse / rectangle search and detection algorithm based on the object out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/39G06K9/54
Inventor 陈皓胡亚平刘玮陈炯聪黄曙余南华曾宪立陈喆郑韬定志锋金杰冯贵宾
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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