Sheet material thickness online detection and adjustment system based on laser ultrasonic

Abstract

A sheet material thickness online detection and adjustment system based on laser ultrasonic comprises a sheet material rolling mechanism and a sheet material thickness online detection mechanism. The sheet material rolling mechanism comprises an upper roller, a lower roller, an upper-lower roller interval adjust mechanism and a PLC control system, the sheet material thickness online detection mechanism comprises an optics system assembly, a high temperature testing meter, a data collection system assembly and a data process system assembly, the data process system assembly transforms bipolar signals which are aliased in peak values and complex in background noise into unipolar signals which are clear in peak values and low in background noise, so that the time that longitudinal wave and transverse wave reach the center of the bottom surface of the sheet material for the first two times is obtained, and thereby the sheet material thickness value is calculated, the measured sheet material thickness value is compared with a preset sheet material thickness value in the PLC control system, the PLC control system transmits forward rotating / backward rotation movement commands to a servo motor, so that the interval between the upper roller and the lower roller is adjusted, and the sheet material thickness value is made to be consistent with the preset sheet material thickness value.

Description

technical field [0001] The invention belongs to the field of plate processing and manufacturing, and in particular relates to a plate thickness detection and adjustment system based on laser ultrasound. Production deviation to ensure the uniformity of plate thickness. Background technique [0002] In the actual industrial production process, the uniformity of plate thickness is an important indicator, which is directly related to the amount of subsequent processing, affecting the final product yield and overall processing cost. It is very important for the thickness uniformity of the plate to be able to quickly and accurately detect the thickness value of the plate online, and to be able to adjust the process flow in time according to the test results. Due to the rough surface, unevenness, and unstable temperature of industrial production plates, and the working environment is usually extreme environments such as high temperature, strong corrosion, and high radiation, gener...

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Problems solved by technology

In such cases, there is a large error in obtaining the thickness value of the plate by using the laser receiver, signal converter, etc. to find the deviation value of the reflected laser angle. Perhaps this method is applicable to the field of thickness measurement of optical components, but due to the fact that industrial production of plates is often The surface is rough, uneven, and the temperature is unstable. Therefore, this method has a large error for the thickness measurement of industrial production plates, so it is not a reasonable choice.

Moreover, the basic components of this type of device include laser transmitters, laser receivers, photoelectric signal converters and other equipment. The cost of these three types of equipment is relatively high, and the overall equipment cost is not optimistic.

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