Circular pointer type meter reading method of a switch cabinet detection device

A detection device and meter reading technology, applied in the direction of instruments, character and pattern recognition, computer parts, etc., can solve the problems of only considering still image recognition, not fully utilizing the positioning function of the switch cabinet detection device, the prior knowledge of the instruments to be identified, etc. , to achieve the effect of improving accuracy, improving accuracy, and improving recognition accuracy

Active Publication Date: 2018-12-18
SOUTHEAST UNIV
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Problems solved by technology

Most of today's pointer instrument reading methods only consider the identification of still images, and do not make full use

Method used

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  • Circular pointer type meter reading method of a switch cabinet detection device
  • Circular pointer type meter reading method of a switch cabinet detection device
  • Circular pointer type meter reading method of a switch cabinet detection device

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Embodiment Construction

[0032] The technical solution of the present invention will be further introduced below in combination with specific implementation methods and accompanying drawings.

[0033] This specific embodiment discloses a method for reading a circular pointer meter of a switchgear detection device. The original dial image is as follows: figure 2 As shown, this method is as figure 1 shown, including the following steps:

[0034] S1: Carry out image recognition on several circular pointer meters to be recognized in advance, obtain the best image recognition parameters, and store them in the database; in substations, the types of circular pointer meters to be recognized are predetermined, Generally, it is a barometer, a thermometer, an oil pressure gauge, etc.;

[0035] S2: Obtain the position of the switch cabinet detection device in real time, and read the type of instrument to be identified and the best image recognition parameters from the database according to the position; the sw...

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Abstract

The invention discloses a circular pointer type meter reading method of a switch cabinet detection device. The prior knowledge of the instrument to be identified is fully utilized to determine the optimal image processing parameters and improve the recognition accuracy of the device. According to the positioning function of the switch cabinet detection device, it is not necessary to stop at the designated position to collect images, so as to improve the detection efficiency of the device. After the circle boundary is recognized, the effective area is determined, and the elements that affect the recognition pointer, such as meter frame and dial, are deleted, so as to improve the precision of pointer recognition. The effective region is expanded to avoid too few pixels at the pointer boundary, which makes the probabilistic Hough transform unable to recognize the pointer boundary and improves the accuracy of pointer recognition.

Description

technical field [0001] The invention relates to the field of reading identification of pointer meters, in particular to a reading method of circular pointer meters. Background technique [0002] Pointer instruments are widely used in substations because of their advantages such as simple structure, low price, convenient maintenance, and high reliability, and can be used to indicate air pressure, temperature, oil pressure, etc. Nowadays, in order to improve work efficiency and safety, substations are gradually equipped with switchgear detection devices for automatic inspection of substations. Automatic reading of various pointer instruments is an important function in the switchgear testing device. Most of today's pointer instrument reading methods only consider the identification of still images, and do not make full use of the positioning function of the switch cabinet detection device and the prior knowledge of the instrument to be identified. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): G06K9/46G06K9/32
CPCG06V10/255G06V10/48G06V10/44G06V2201/02
Inventor 王爱民袁昌旺徐勤朱晨超
Owner SOUTHEAST UNIV
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