Development of image measuring instrument

Image measurement is a measurement method to detect and send the information of the object to be measured. The purpose is to extract useful signals from images and measure them based on image analysis and recognition. Image Measuring Instrument is an optical imaging system (called imaging system) based on imaging on optocoupler. It is collected by optical coupler equipment, processed by software, displayed on the computer screen, and geometric calculation is carried out using measurement software to obtain the final Z result. Non contact measuring instrument. The measurement software extracts the coordinate points of the workpiece surface through digital image processing technology, and then uses coordinate transformation and data processing technology to convert them into various geometric elements in the coordinate measurement space, so as to obtain geometric dimensions, geometric tolerances and other parameters with the image measuring instrument.

An overview of the development of image measuring instruments

In the late 1970s, especially since Professor David Marr established the theoretical framework of computational vision, image processing technology and image sensors have developed rapidly. With the development and maturity of coordinate measurement technology, further substantial progress has been made in the development and application of coordinate measurement methods in the field of optical measurement based on optical comparison.

In 1977, the American View Engineering Company invented the world's first RB-1 image measurement system driven by XYZ axis driven by motor. It is an automatic image measuring instrument, which integrates video detection and software measurement in a control terminal. In addition, Mechanical Technology's Boice Vista system takes advantage of CMM and integrates a video image measurement system on the CMM probe, which combines measurement data with pre programmed nominal dimensions and tolerances. comparison. The two instruments borrowed the coordinate measurement principle of CMM in different ways to project the image of the measured object into the coordinate system. Its measuring platform inherits the form of coordinate measuring machine, but its probe is similar to an optical projector. Gantry type image measuring instrument The appearance of these instruments has opened up an important measuring instrument industry, the image measuring instrument industry. In the early 1980s, image measurement technology had an important development. In 1981, ROI developed an optical image probe, which can replace the contact probe on CMM for non-contact measurement. Since then, this optical accessory has become one of the basic components of imaging equipment. In the mid-1980s, image measuring instruments with high magnification microscope eyepieces appeared on the market.

In the 1990s, with the development of CCD technology, computer technology, digital image processing technology, LED lighting technology and DC/AC servo drive technology, image measuring instrument products have made great progress. More and more manufacturers have entered the market of image measuring instruments and jointly promoted the development of image measuring instruments.