Laser thickness gauge taking laser as light source

Abstract

The invention relates to a laser thickness gauge taking laser as a light source. The laser thickness gauge structurally comprises a shell and is characterized in that a lying U-shaped bracket is arranged on the shell, and an upper laser and a lower laser which are opposite for emitting, a diffraction-free optical system and an area array CCD (Charge Coupled Device) are arranged in the U-shaped bracket. On this basis, laser beams emitted from the upper laser and the lower laser are respectively radiated onto the upper surface and the lower surface of a tested object through the laser thickness gauge to form an upper light spot and a lower light spot; and light rays of the two light spots are imaged onto the area array CCD through the diffraction-free optical system, are subjected to photoelectric conversion and are then transmitted to a computer to be processed to directly obtain the thickness of the tested object. The laser thickness gauge disclosed by the invention has the beneficial effects that the measurement precision is high and reaches + / -0.0015mm, measurement errors caused by deformation, vibration and the like of the U-shaped bracket are avoided, the measurement precision is greatly improved; and the laser thickness gauge is resistant to vibration, simple to install and use, and stable in work.

Description

technical field [0001] The invention belongs to the technical field of measurement, relates to an object capable of measuring thickness below 5mm, and is widely used in various industrial productions that need to measure the thickness of ultra-thin objects. Background technique [0002] The successful application of laser thickness measurement system in non-contact and online dynamic measurement in industrial production plays a very important role in improving product quality, production efficiency and safety guarantee. It can complete many detection tasks that cannot be completed by contact measurement means. Widely used in online dynamic non-contact thickness measurement of battery pole pieces, used in transparent film / paper / glass / rubber cow felt and other production enterprises, used for online detection of product thickness on the production line, used in steel plate, copper / aluminum foil, plate production Enterprises, on-line detection of the thickness of products on t...

AI Technical Summary

Problems solved by technology

[0003] The current laser thickness gauge is generally composed of two laser displacement sensors. Due to the limitation of the working environment in the industrial production line, there will be high temperature in some workplaces, and once the U-shaped frame is deformed or vibrated, the measurement accuracy will be reduced. Not high, the two photoelectric conversion parts do not work synchronously so that the measurement points of the upper and lower probes do not coincide, and the resulting measurement accuracy is not high, the measurement accuracy is unstable, etc.

Images