Abstract
Based on laser-scanned measuring technology, a method of on-line dynamic non-contact measurement and feedback control of processing dimensions, i.e. a double-edges laser-scanned large diameter on-line dynamic measurement and control system, is presented, which can be used to measure diameter in large-scale machine part processing. In this paper, the working principle, the overall structure and the microcomputer real-time control and data processing, of the system are discussed in detail, the method of double-edges scanned large diameter dimension measurement and control being theoretically analyzed, its possibility then being verified by experiments into the turning of large diameters machine parts by a vertical lathe. The system adopts the measuring scheme of double-edges laser-scanning combined with grating displacement measurement. The two-edges characteristic information of the measured diameter is given by the double-edges laser-scanned measuring system, the non-contact measurement of the large diameter dimension being realized to combine with the grating displacement-measuring system. The main controller gives out a feedback control signal by means of the measured results, and controls the advance and retreat of the lathe tool by the servo-control system of the vertical lathe to realize on-line dynamic non-contact measurement and control in processing.
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