Automatic light inspection machine foreign matter detection device

Abstract

The invention discloses an automatic light inspection machine foreign matter detection device, which includes more than one detection stations. Each detection station is equipped with a camera to provide a bright field light source assembly for bright field lighting and provide a dark field light source assembly for dark field lighting. The bright field light source assembly and the dark field light source assembly illuminate one to-be-detected bottle alternately, and the camera performs image acquisition on the to-be-detected bottle when the to-be-detected bottle is illuminated. The device provided by the invention has the characteristics of simple structure, low cost, high detection efficiency and accuracy, and can simultaneously realize bright field and dark field detection at one station.

Description

technical field [0001] The invention mainly relates to the field of food and medicine packaging machinery, in particular to a foreign object detection device used on an automatic light inspection machine. Background technique [0002] In the field of food and pharmaceutical packaging equipment, in order to detect foreign matter in bottled liquid food or medicine (such as: ampoules, oral liquids, vials, etc.), manual light inspection and automatic light inspection are often used. Due to the insufficient detection accuracy of manual light inspection, and the detection results are easily affected by human subjective emotions and other factors, manual light inspection is gradually replaced by automatic light inspection. [0003] In the existing light inspection machine, a plurality of foreign matter detection stations are set on a turntable, and these stations include at least one bright field detection station and at least one dark field detection station, and the foreign matte...

AI Technical Summary

Problems solved by technology

It is because of the physical contradiction between bright field and dark field photos that it is generally believed that the detection of foreign objects such as hair strands, black blocks, glass shavings, and white blocks cannot be realized at the same work station at the same time.

The design of the bright field inspection station and the dark field inspection station of the automatic light inspection machine is relatively mature, but there is a defect that cannot be completely eliminated when the stations are separated, that is, the bright field inspection station and the dark field inspection station. The light sources of the two stations are turned on and off at the same time, so that the stray light between the two stations affects each other, resulting in an increase in false detection rate and missed detection rate

Furthermore, before synchronous image acquisition of cameras, bottles and light sources at each station, the bottle needs to be rotated at high speed and braked. The unique mechanical structure and the control system of the rotary bottle lead to a very large and complex structure of the entire foreign object detection device, and the cost is relatively high

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