Method for automatically adjusting length of screw of low-voltage circuit breaker bimetallic strip

A technology of low-voltage circuit breakers and bimetal strips, applied in the direction of calibration/finding protection devices, etc., can solve problems such as low efficiency and errors, and achieve the effects of improving reliability, realizing automatic adjustment, and improving accuracy and stability

Active Publication Date: 2014-07-23
SHANGHAI UNIV OF ENG SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

For the detection of circuit breaker overload protection, most of the current market adopts the method of manually adjusting the bimetal screw, that is, if the circuit breaker does not operate within the specified time, manually adjust

Method used

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  • Method for automatically adjusting length of screw of low-voltage circuit breaker bimetallic strip
  • Method for automatically adjusting length of screw of low-voltage circuit breaker bimetallic strip

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0020] to combine figure 1 and figure 2 As shown: a method for automatically adjusting the length of the bimetal screws of the low-voltage circuit breaker provided by the present invention is to install an axially movable platform 5 under the working frame where the low-voltage circuit breaker is placed, and to install on the axially movable platform 5 There is a fixed bracket 12, on which a CCD camera 1 and a lifting motor 15 are arranged, and the CCD camera 1 is aimed at the screw 7 and the nut 8 of the bimetal 6 of the low-voltage circuit breaker; and the CCD camera 1 The output end is connected with the input end of the image acquisition card 2, the output end of the image acquisition card 2 is connected with the input end of the computer system 3, and the output end of the computer system 3 is connected with the input end of the PLC control ...

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Abstract

The invention discloses a method for automatically adjusting the length of a screw of a low-voltage circuit breaker bimetallic strip. The method comprises the steps of capturing the image information of a screw and a nut of the low-voltage circuit breaker bimetallic strip by use of a CCD (Charge Coupled Device) camera in real time, and then inputting the image information which is subjected to A/D conversion by using an image acquisition card previously to a computer system, processing the image information by the computer system to obtain the central coordinate information of the screw and the nut and sending the central coordinate information to a PLC (Programmable Logic Control) unit in the form of pulses, and then driving an axial moving platform and a motor to displace so as to adjust the length of the screw. The method is capable of realizing automatic adjustment of the length of the screw by automatically detecting the moving state of the screw by use of the visual positioning technology and calculating the central coordinates of the screw according to the Hough algorithm, and therefore, the traditional manual positioning adjustment manner is changed, the detection efficiency and the accuracy and stability of the system are improved, and the reliability of overload protection of the low-voltage circuit breaker is improved; the method has practical value.

Description

technical field [0001] The invention relates to a method for automatically adjusting the length of a low-voltage circuit breaker bimetal screw, specifically, a method for automatically adjusting the length of a low-voltage circuit breaker bimetal screw by using visual positioning technology, and belongs to the technical field of low-voltage circuit breaker overload protection . Background technique [0002] Overload protection is one of the important functions of low-voltage circuit breakers. Its working principle is: when the circuit breaker’s loop current exceeds the rated value, the bimetal strip is deformed by heat and shifts to one side of the release until the bimetal strip on the The tripping screw pushes against the tripping device, so that the tripping action of the tripping device occurs and the circuit current is cut off. For the detection of circuit breaker overload protection, most of the current market adopts the method of manually adjusting the bimetal screw,...

Claims

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Application Information

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IPC IPC(8): H01H69/01
Inventor 李秀芹杜向阳甘宜洋贾聪徐超
Owner SHANGHAI UNIV OF ENG SCI
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