FPGA-based multi-CCD high-speed, high-accuracy and wide-range industrial grade laser triangulation distance measuring instrument

Abstract

The invention discloses an FPGA-based multi-CCD high-speed, high-accuracy and wide-range industrial grade laser triangulation distance measuring instrument. A laser device emits a laser beam, the laser beam is illuminated to a measured object after passing through a convergence lens to form a light spot, the light spot scatters on the surface of the measured object, one part of scattered light passes through a receiving lens and is imaged on a linear array CCD drive board, a light enveloping signal generated by the linear array CCD drive board is sent to an FPGA control board, a CCD drive module is in one-way connection with a pixel position and distance calculation module, the pixel position and distance calculation module is in one-way connection with a liquid crystal display drive module, a D / A conversion drive module and an RS-422 communication module respectively, and a constant-temperature cavity temperature measuring drive module is in one-way connection with a heating and refrigeration control module and a digital potentiometer drive module respectively. The FPGA-based multi-CCD high-speed, high-accuracy and wide-range industrial grade laser triangulation distance measuring instrument has the characteristics of rapid system response speed, high measurement accuracy, wide distance measurement range, capability of measuring a high-temperature object, strong interference resistant capability and the like.

Description

technical field [0001] The invention relates to a device for realizing non-contact high-speed distance measurement for moving objects, belonging to the field of optical computing equipment, in particular to a high-speed, high-precision and wide-range industrial-grade laser triangulation distance meter based on FPGA and multiple CCDs. Background technique [0002] With the continuous development of modern industry, automatic ranging technology has been widely used in navigation systems, industrial robots and many other fields. The traditional contact distance measurement is in contact with the measured object, resulting in deformation, affecting the measurement accuracy, damaging the surface of the object, and slow detection speed, which can no longer meet the requirements; due to its good accuracy and real-time performance, non-contact distance measurement has become Research hotspots in the field of measurement. Non-contact distance measurement mainly includes methods such...

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems existing in the prior art, such as the slow response speed of laser ranging by the time reflection method, the small measuring range of ordinary laser triangulation rangefinders, and the inability to measure high-temperature objects, the present invention provides a system with fast response speed, high measurement accuracy, and High-speed, high-precision and wide-range industrial-grade laser triangulation rangefinder based on FPGA and multi-CCD, which can measure high-temperature objects, have strong anti-interference ability, and can be used in various harsh industrial environments. It can realize non-contact high-speed ranging for moving objects.

Images