On-line detection system for hot object

Abstract

The invention discloses an on-line detection system for a hot object. The on-line detection system comprises two CCD cameras, a DLP projector, two band-pass filters, an image acquisition card, a computer and a support, wherein the CCD cameras and the DLP projector are fixed on the same metal plate, optical filters are arranged in front of the CCD cameras respectively, included angles between optical center shafts of the CCD cameras and an optical center shaft of the DLP projector are between 20 and 60 DEG, the metal plate is packaged by adopting a shell, and the support is used to support under the metal plate; and the DLP projector projects a blue sinusoidal grating to a measured object in a red and hot state, the two CCD cameras are used to synchronously acquire the deformed blue sinusoidal grating reflected by the measured object, and a shot sinusoidal grating image is transmitted to the computer for data processing through the image acquisition card to obtain three-dimensional data of the measured object. The system combines the advantages of structural light measurement technology to accurately measure dense point cloud data of complex curved surfaces within the local range of workpieces; and the system can perform quick and accurate on-line measurement on objects under high temperature conditions to obtain the three-dimensional data of the surfaces of the objects.

Description

technical field [0001] The invention belongs to the field of precision measurement, and specifically designs an online measurement technology and system for hot objects, which are used for three-dimensional measurement of hot objects. Background technique [0002] Hot objects usually refer to solids in a red-hot state whose temperature is between 600 and 1400°C, such as hot forgings in a red-hot state. With the development of electric power, machinery, energy and chemical industries, the demand for manufacturing large-scale key components is increasing. Therefore, the dimensional accuracy of many hot-formed parts has become an important factor to ensure the quality of major technical equipment. At present, in the hot forming industry, the scrap rate of products is very high, and the waste of resources in production is serious. According to the investigation of the U.S. Department of Energy, the scrap rate in the U.S. forging industry is greater than 15%. The main reason for...

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Second, self-radiating rays still exhibit a problem: it degrades the signal qual

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