Multifunctional vision sensor with binocular spatial structure

Abstract

The binocular stereo multifunctional visual sensor includes casing and first video camera, variable projector, and the second video camera arranged successively inside the casing. Two video cameras constitute a binocular stereo visual measuring mechanism in spatial triangular relation meeting the requirement of triangular measurement principle. The variable projector has variable light source, which may be a common projecting light source or a characteristic projecting light source. The binocular stereo multifunctional visual sensor has united calibration process and may be used in multifunctional measurement, and the present invention solves the technological problems of providing required flexibility, stability, etc. of visual sensor for visual measurement.

Description

technical field [0001] The invention relates to a precision measuring device, in particular to a multifunctional vision sensor based on a binocular stereo structure. Background technique [0002] Visual measurement technology is an emerging modern industrial on-site measurement technology, which has been widely used in automobile manufacturing, steel pipe processing, mold inspection, aerospace assembly and other fields. The visual sensor is the direct source of information of the visual measurement system, mainly composed of an image sensor (camera, CCD), light projector and other auxiliary equipment, and its main function is to obtain the most original image of the visual measurement system. At present, there are different vision sensors (binocular vision sensor, single-light strip structured light sensor and multi-light strip structured light sensor, etc.) for different measurement objects, such as round holes, ridges and shapes. The calibration methods are all different,...

AI Technical Summary

Problems solved by technology

Therefore, if the system needs to measure multiple different measurement objects, there is no uniform standard for the sensor from manufacturing, installation, to calibration, which increases the cost and complexity of system establishment, and also reduces the maintainability of the system

[0003] Existing visual sensors are designed for specific objects to be measured. For example, the binocular vision sensor uses two cameras placed alternately to measure the parameters of the round hole; the single light strip structured light sensor uses a camera , form a triangulation with a single semiconductor laser light strip to realize the measurement of ridge feature points; a multi-light strip structured light sensor uses a camera to form a triangulation measurement with multiple semiconductor laser light strips to realize free-form surface measurement. Their structure Varies, poor adaptability, calibration also varies

At the same time, the existing sensors are all made of sheet metal or machined, with complex processing, high cost, long cycle time, and poor stability of the sensor, which cannot meet the needs of large-volume, high-precision on-site applications.

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