Combination space precision measurement system

Abstract

The invention discloses a combined space precise measurement system comprising a CCD camera, a DLP projector, a tripod and a computer, as well as at least four infrared laser transmitters and at least three sensors and receives. The sensors receive infrared signals which are transmitted by the infrared laser transmitters and respectively transmit light signals to the receivers, and then the receivers convert the signals to digital angle information to be transmitted to the computer to carry out the processing. The combined space precise measurement system combines the advantages of the indoor GPS positioning technology and the structured light measurement technology, takes a structured light measurement subsystem which is based on the digital optical projection as a measurement terminal and precisely measures dense point cloud data of a complicated curved surface of a workpiece in the local scope; at the same time, the combined space precise measurement system uses a large-scale electro-optical tracking positioning subsystem which is based on the GPS principle to carry out the monitoring of a large-scale global coordinate system, carries out the real-time tracking of precise coordinates of the structured light measurement subsystem under a whole-field coordinate system of the workpiece, automatically fuses the obtained dense point cloud data under the same coordinate system and realizes the complete precise measurement of the workpiece with the ultra-large size.

Description

technical field [0001] The invention belongs to the field of precision measurement, and in particular relates to a combined space precision measurement system, which is especially suitable for oversized parts. Background technique [0002] With the wide application of 3D measurement technology in industries such as aerospace, shipbuilding, automobiles, and large molds, there is an increasing demand for high-precision 3D measurement of super-sized parts represented by aircraft shells. [0003] At present, in terms of large-scale detection technology, four systems, electronic theodolite, total station, laser space tracker and indoor GPS system, have been widely used. The electronic theodolite industrial measurement system is based on the principle of spatial intersection triangulation, using a combination of multiple theodolites, combined with precise orientation technology, the current electronic theodolite has an angle measurement accuracy of 0.5", and theoretically can achi...

AI Technical Summary

Problems solved by technology

[0006] To sum up: large-scale positioning detection technologies such as electronic theodolite, total station, laser space tracker and indoor GPS system can complete accurate positioning in a large space, but cannot measure local features in the measurement space; 3D laser Although measurement technology and structured light measurement technology have good performance in high-precision measurement of local space, the measurement space is limited, and it is impossible to complete the three-dimensional measurement of super-large parts

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