Wall thickness detecting device and wall thickness detecting method for transparent and semitransparent glass bottles

Abstract

The invention discloses a wall thickness detecting device and a wall thickness detecting method for transparent and semitransparent glass bottles. The device comprises a laser emitter and an image shooting device which are correspondingly arranged relative to a normal in a detecting point on a glass bottle to be detected, wherein the emitting end of the laser emitter is toward the detecting point; a central axis of the emitting end of the laser emitter is in an acute angle to the level; an included angle between the central axis of the emitting end of the laser emitter and a normal at the detecting point is an acute angle; and light emitted by reversely refracting a laser ray from the laser emitter through the internal and external walls of the glass bottle to be detected is received via the image shooting device. The method disclosed by the invention is carried out based on the device, the wall thickness at the detecting point is obtained by calculation by measuring the pixel distance of two shot parallel light spots formed on the internal and external walls. The device and method provided by the invention are suitable for detecting the wall thickness of a colorless transparent glass bottle and semitransparent glass bottles with deep colors such as brown semitransparent glass bottle and green semitransparent glass bottle on real time in a quick, accurate and non-contact way.

Description

technical field [0001] The invention relates to a glass bottle wall thickness detection device and method, in particular to a device and method suitable for detecting the bottle wall thickness of colorless transparent glass bottles and brown, green and other dark translucent glass bottles. Background technique [0002] In the process of glass bottle production and processing, it is necessary to accurately measure the thickness of the glass bottle wall to ensure the processing quality of the glass bottle body. [0003] At present, most domestic glass bottle manufacturers still use contact measuring instruments to measure the wall thickness of glass bottles. This contact measurement method has disadvantages such as low accuracy, labor and material resources, and is not conducive to online detection. [0004] The existing non-contact optical measurement methods mainly use photocells or other photosensitive elements to receive the reflected light of the laser on the surface of t...

AI Technical Summary

Problems solved by technology

However, from figure 2 It can be seen from the figure that point E' overlaps with spot 41, and point E" is very close to spot 42. Therefore, points E' and E" where glare occurs will affect the recognition of spots 41 and 42 respectively, so the spot cannot be accurately measured The pixel distance between 41 and 42, the obtained bottle wall thickness is not accurate

It can be seen that this optical detection method also has the defect of inaccurate distance measurement

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