Object three-dimensional measurement system and measurement method based on structured light

Abstract

The invention discloses an object three-dimensional measurement system and method based on structured light, and the system comprises a first parallel flat plate, a second parallel flat plate, a laser transmitting unit which is used for transmitting a laser beam to a measured object, and an image collection unit which is used for carrying out the image collection of the measured object. The first parallel flat plate is arranged according to a specified inclination angle and is perpendicular to the direction of laser beams emitted by the laser emitting unit, so that the laser beams emitted by the laser emitting unit are emitted perpendicular to the first parallel plate, and the second parallel flat plate is horizontally arranged and is located on the same horizontal plane with the laser emitting unit. The image collection unit is arranged above the second parallel flat plate in parallel; the method is a measurement method using the measurement system. The measurement system and the measurement method have the advantages of being simple in structure, high in measurement efficiency and precision, high in anti-interference performance, wide in application range and the like.

Description

technical field [0001] The invention relates to the technical field of three-dimensional measurement of objects, in particular to a three-dimensional measurement system and method for a target based on structured light. Background technique [0002] For the three-dimensional measurement of objects, the principle of optical triangulation is usually used for measurement. The typical example is laser triangulation. Compared with other non-contact measurement methods, laser triangulation has high efficiency, stable signal processing and anti-interference when measuring objects. Strong and high measurement accuracy, simple equipment maintenance and many other advantages, so it is widely used in various industrial fields. [0003] According to the different angles of the light emitted by the laser, the laser triangulation method is divided into two measurement methods: direct and oblique: [0004] direct beam laser triangulation figure 1 As shown, where the laser emission beam i...

AI Technical Summary

Problems solved by technology

In addition, in the actual measurement of the laser triangulation method, if the object to be measured is more complicated, sometimes the light strip formed by the beam on the object to be measured cannot be captured by the camera. The larger the angle is, the easier it is to cause measurement blind spots, and the angle of incidence of the oblique-beam triangulation method is relatively large, so the oblique-beam triangulation method is more likely to form a measurement blind zone

To sum up, the above-mentioned traditional direct laser triangulation method and oblique laser triangulation method are complex to implement, and both have certain defects. Their respective application scenarios are limited and cannot meet the needs of different application scenarios.

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