Infrared light curtain machine for contour recognition and article contour recognition system and method thereof

Abstract

The invention relates to an article contour recognition device and method. An infrared light curtain machine for contour recognition comprises a door frame, a reflection light curtain and a transmission light curtain, wherein the transmission light curtain comprises a transmitter and a receiver; the reflection light curtain is transversely mounted above the door frame; the transmitter of the transmission light curtain is mounted on one side of the vertical direction of the door frame, and the receiver of the transmission light curtain is mounted on the other side; and the output signals of the reflection light curtain, the transmitter of the transmission light curtain and the receiver of the transmission light curtain are connected into a decoder. In the article contour recognition system and method, the output signals of the reflection light curtain of the infrared light curtain machine and the transmitter and receiver of the transmission light curtain are connected into the decoder; the decoder transfers the treated real-time data to an industrial control machine through a serial port; the industrial control machine establishes three-dimensional coordinates through a software treatment system; and the height direction of an article is regarded as a Z axis, the width direction of the article is regarded as a Y axis, and the moving direction of the article is regarded as an X axis so as to realize three-dimensional contour recognition and intelligent measurement of the size of the article passing through the door frame of the light curtain machine at a constant speed.

Description

technical field [0001] The invention relates to a sensor device and an object contour recognition system for object contour recognition, in particular to an infrared light curtain machine for contour recognition and its object contour recognition system and method. Background technique [0002] The three-dimensional morphological feature of an object is one of the most important features used to describe an object. The purpose of object contour recognition is to detect the three-dimensional size of the object, and apply the corresponding algorithm to draw the three-dimensional contour map of the object through computer software. [0003] People have been studying the application of various optical methods to measure the three-dimensional surface shape of objects. The basic methods for obtaining the three-dimensional contour size of objects can be divided into two categories: passive contour measurement and active three-dimensional contour measurement. The passive three-dim...

AI Technical Summary

Problems solved by technology

The passive three-dimensional contour recognition measurement method uses unstructured light illumination to obtain two-dimensional images in different visual directions from one or more camera systems, and then determines the third dimension from the two-dimensional images obtained in different visual directions through a certain related matching algorithm. The disadvantage is how to match these two-dimensional images with high precision when there is no obvious difference in the surface reflectance of the measured object, because local and full-field coordinate changes are performed to overcome the transparent Distortion and deformity are very difficult, and it is impossible to measure the actual size of the object

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