Multi-camera combination based method for online measuring engine cylinder combination face hole group

Abstract

The invention belongs to the vision measurement technology and machine element detection, in particular to a multi-camera combination based method for online measuring an engine cylinder combination face hole group. Aiming to design a scheme for quick measuring an engine cylinder combination face hole group based on multiple vision sensors combination and meet the detection requirements of intelligence, quick speed, high precision and low cost in production lines, the invention adopts the technical scheme that two locating holes at the bottom of an engine are taken as a standard to establish a measurement coordinate system, a measurement camera is matched with a high-precision mechanical guide rail driven by a stepping motor for carrying out mechanical scanning to realize circular hole image acquisition of the engine cylinder combination face hole group, meanwhile, a high-precision grating sensor on a grating ruler is used for synchronously measuring the position of a measurement camera acquisition line and at last the diameter and position measurement results of the engine cylinder combination face hole group relative to the measurement coordinate system are obtained by computer digital image processing and space coordinate conversion. The invention is mainly applied to machine element measurement.

Description

technical field [0001] The invention belongs to visual detection technology and mechanical part detection. Specifically, the present invention relates to an online measurement method of engine cylinder combined face group based on multi-camera combination. Background technique [0002] The engine block is the positioning part of most parts in the engine. The combined face group measurements of the engine block determine the overall coupling effect of the engine. The engine block joint face group is mainly divided into two categories: cylinder bore, positioning hole and coupling hole. The size, shape and position of these holes are subject to tight tolerances and are decisive for the quality of the final product. [0003] At present, the combination of engine cylinder block and face group on the production line is mostly measured by a three-coordinate machine. Due to the limitation of detection efficiency, only a small batch of random inspection can be carried out, which i...

AI Technical Summary

Problems solved by technology

[0003] At present, the combination of the engine block and face group on the production line is mostly measured by a three-coordinate machine. Due to the limitation of detection efficiency, only a small batch of random inspections can be carried out, which is difficult to meet the requirements of automatic, fast and online detection on the production line.

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