Online steel plate hole detection device and calculation method of longitudinal size of hole

Abstract

The invention relates to an online steel plate hole detection device and a calculation method of the longitudinal size of a hole. The device comprises a bracket 1, an ultraviolet light source 2, a photoelectric multiplication receiver 3, a signal line 4, a control cabinet 5, a light cover 6, an optical filter 7, a light barrier 8, an automatic tracker 9, a servo motor 10, an electric box 11, a preamplifier 12, a PLC programmer 13 and a computer 14, wherein the PLC programmer 13 is connected with a singlechip 15 by the signal line 4; the singlechip 15 is connected with the preamplifier 12 by the signal line 4; and the servo motor 10 is a step motor. The calculation method of the longitudinal size of a hole comprises the following steps: two equations: b=(a-w) / 2*d / h and L=((t*s)-w-b) / 2 are respectively input into the computer 14; and the singlechip 15 outputs measured data: a, w, d, h, t and s to the PLC programmer 13 and then transmits the data to the computer 14 which calculates a value b and a value L.

Description

technical field [0001] The invention relates to a detection device and method, in particular to an online steel plate hole detection device and a calculation method for the longitudinal dimension of the steel plate hole. Background technique [0002] In the production process of the thin plate, holes will occasionally appear during the rolling process due to various reasons. In order to improve the quality of the steel plate and meet the market demand, the holes that appear should be found and dealt with in time to ensure the product quality of the thin plate , it is necessary to use modern testing equipment. [0003] Before this patent, the porometer produced by American Thermo Fisher Scientific Co., Ltd. was generally used. Its shortcoming is that the device can only alarm when it finds a hole, and cannot directly display the specific position of the hole. The hole can only be displayed through the lower computer. The distance to the starting point, once the lower compute...

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Problems solved by technology

[0003] Before this patent, the hole meter produced by Thermo Fisher Scientific Corporation of the United States was generally used. Its shortcoming is that the device can only alarm when it finds a hole, and cannot directly display the specific position of the hole. The hole can only be displayed through the lower computer. The distance to the starting point, once the lower computer fails, the detection results cannot be obtained in time, and the circuit board is used to ensure the stability of the light source, and its installation and production are complicated

Although it can directly display the specific position of the hole, and the structure of the light source stabilizer is simple, but due to structural problems, there are problems that the size of the hole and the holes that appear in the horizontal direction of the steel plate cannot be detected.

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