The equipment, instruments and systems described herein are mainly used for geometrical measurement of geometrical errors in metal workpieces. With the development of computer, laser technology, electronics technology and various high-tech multi-disciplinary penetration, they are developed from traditional mechanical, pneumatic and electronic development to integrated optical, mechanical and electrical integration. Post- measurement has evolved to online monitoring measurements , from contact measurement to non-contact measurement .
Measuring equipment, instruments, and systems, their overall development trend is toward high reliability, process stability, adaptability and accuracy to the use of the site. Among them, general-purpose equipment and appliances are developing toward small digitization. Electronic devices and appliances are developing toward the integration of electronic components and circuits. Photoelectric large-scale integrated equipment and instrument detection technology are developing towards automation, intelligence, dynamics and high precision. The test results are developing towards digitalization and image formation, and the volume is developing towards miniaturization. The structure is moving towards modularization and unit combination, and the detection function is integrated. Sex, multi-parameter, multidimensional development.
China's production of mechanical, pneumatic, electronic general-purpose products, such as: calipers, micrometers (tables) and other products, its main manufacturers are Shanghai Measuring Tool Blade Factory, Guilin Guanglu Company, Harbin Measuring Tool Cutting Factory, Zhongyuan Measuring Instrument Factory, etc. . The products they produce are close to the level of such products produced by typical foreign manufacturers, such as Mitutoyo Corporation of Japan and Tesa Corporation of Switzerland. The highest measurement accuracy is generally on the order of micrometers. National products have been able to meet domestic needs, accounting for more than 95% of the market. Some of these manufacturers have a large share of exports. The biggest disadvantage of the above products is the poor waterproof performance. At present, Japan and Switzerland have successfully developed waterproof general-purpose products that use the non-capacitor principle.
The overall indicators of online measurement and optoelectronic contact products produced in China are close to those of developed countries, such as: Lagage Optoelectronics, and the photoelectric measuring instrument (photoelectric linear gauge) produced by Beijing Legg Super Precision Optoelectronics Research Institute. , round grating angle measurement sensor. Optoelectronic goniometers, absolute photoelectric shaft encoders and other products produced by Chengdu Optoelectronics have reached the micron to 0.1 micron level and have reached the angle of seconds to 0.1 centiseconds.
Photoelectric length measuring instrument
Domestic grating displacement measuring system, among which high-grade products, the length of a single unlengthd glass grating produced by Legg Optoelectronics Instrument Co., Ltd. and Beijing Legge Super Precision Optoelectronics Research Institute is up to 3.5m. The density of the circular grating produced by Changchun Optical Machine has reached 162,000 pairs of lines, which is equivalent to that of foreign countries, but there is still a certain gap in other aspects. These low-end products have already met the needs of the domestic market, and have certain exports, accounting for about 90% of the market share in China. However, about 10% of such high-end products are from abroad. Germany's Heidenhain is the most technologically advanced and largest-selling multinational company, controlling more than 60% of the global market. In 2000, its sales reached 705 million euros.
Circular encoder
The three-coordinate measuring machine is a typical representative of large-scale measuring equipment, and the products of the United Kingdom, the United States, Switzerland and other countries have a high level. Such high-end products, foreign countries occupy more than 80% of China's market share, high and mid-range products, China has been able to meet the needs of the market. The main manufacturers are: Qingdao Outswing Brown Company, Shanghai Measuring Tool Cutting Factory, Xi'an Edwards Company, Aviation Precision Machinery Research Institute and other manufacturers. Among them, Qingdao Outswing Brown Company's products have a large export volume. At present, the biggest disadvantage of the three-coordinate measuring machine is that it adopts the contact measuring method, which affects the improvement of its accuracy and the extensive use. The future trend is to adopt a non-contact measurement method.
At present, China's photoelectric non-contact detection products are far from the developed countries. The typical foreign manufacturers are: Zygo and Tsi in the US, Renishaw in the UK, Zambach in Switzerland, Zeiss and Opton in Germany, Anritsu and Mitsubishi in Japan. Panasonic company and so on. Their accuracy has reached 0.1 micron, and the output value is increasing at a rate of 10% per year, occupying the main international market. The main domestic manufacturers that can produce such products are Beijing Legg Super Precision Optoelectronics Research Institute, Legg Optoelectronics Instrument Co., Ltd., and Changchun Institute of Optics and Mechanics. Its main products are: laser scanning multi-function detector; general laser measuring instrument; shape error photoelectric integrated measuring machine; laser roundness meter and other products.
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