A low-cost laser ranging method based on a common camera chip

Abstract

The invention provides a low-cost laser distance measurement apparatus and method based on a common pick-up head chip. The laser distance measurement apparatus comprises a laser emitter, an imaging lens group, the common pick-up head chip and an image processing unit. The emission direction of the laser emitter and the plane where the common pick-up head chip is disposed form certain angle arrangement; the distance from the laser emitter to the center of the common pick-up head chip is a specific value; a laser beam is irradiated on the surface of a target object to be measured, diffuse reflection is generated, reflected light spots and objects in a current visual field angle are imaged on the common pick-up head chip through the imaging lens group, and the image processing unit receives the light spots and calculates a distance to be measured. The structure is simple, and the user cost is low; and the distance measurement mode is rapid and sensitive. Therefore, the apparatus an method provided by the invention have a quite high application value in such distance measurement fields as communication, aviation, intelligent household and the like.

Description

technical field [0001] The invention relates to a laser ranging method, in particular to a low-cost laser ranging method based on an ordinary camera chip. Background technique [0002] Laser has the characteristics of high brightness, high directivity, high monochromaticity and high coherence, which can greatly improve the measurement accuracy, and is widely used in distance measuring devices. The laser ranging method has the characteristics of simple principle, fast measurement speed and long range. At present, many indoor robot systems use laser ranging devices as the main sensor for drawing maps, positioning and obstacle avoidance. [0003] Traditional laser ranging methods include pulse method, phase method and triangulation method. The measurement accuracy of pulse method is low, and phase method needs a long time to stabilize each distance measurement. Triangulation method has better application effect and low production cost. , is the current research hotspot. Assum...

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Problems solved by technology

At the same time, as attached image 3 As shown, theoretically the shortest ranging distance is point G, but since the laser is not a pixel point, but a spot of light, the shortest distance measuring distance is at point I; similarly, a relatively complete image cannot be photographed within the distance of point H spot

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