Development direction of precision measurement technology: non-contact and high efficiency measurement

In the process of high-precision machining and quality management, with the development of optics, mechanics and electronics integration and systematization, optical measurement technology has developed rapidly, and a large number of corresponding measuring machine products have emerged, and the development of measurement software has been paid more and more attention.In recent years, there are many non-contact measuring machines and various devices developed by using optical principles. For example, MidaLaser, a non-contact tool measuring system, is a new type of measuring machine with a laser probe. This machine can automatically perform non-contact measurement on all tools while the CNC machine tool is running, and automatically position the tools according to the measured values. Sony Precision Engineering Company's non-contact shape measuring machine YP20/21 is also a shape measuring machine using semiconductor laser high-speed and high-precision automatic focusing sensor. All scales are standard components, and the sensor and stage are controlled by microcomputer, which has excellent operational performance and data processing function. Zip250, a non-contact coordinate measuring system sold by YKT Company, is a new measuring machine with high rigidity, high speed and high precision. The carrying capacity of the airborne object platform is 25kg, and the resolution of the scale (X, Y and Z axes) is 0.25 μ m.. The machine is equipped with CCD camera with digital flange and the latest DSP processor, so it can carry out high-speed image processing and measurement, and can also be used with contact probe to carry out related measurement.With the appearance of a large number of non-contact and high-efficiency measuring machines, experts predict that the development direction of measuring technology is roughly as follows:(1) The measurement accuracy develops from micron level to nanometer level, and the measurement resolution is further improved;(2) Transition from point measurement to surface measurement (that is, from precise measurement of length to precise measurement of shape) to improve the overall measurement accuracy;(3) With the application of new technologies such as image processing, remote sensing technology will be popularized in precision measurement engineering;(4) With the establishment of standardization system and the quantification of measurement uncertainty, the reliability of measurement will be effectively improved.In short, measurement technology needs to achieve high precision, but also requires high speed and high efficiency. Therefore, non-contact measurement and high efficiency measurement will inevitably become an important development direction of precision measurement technology in the new century.