Precision verification method and device for small and medium-sized high-precision encoders
A high-precision encoder, small size technology, applied in instruments and other directions, can solve the problems of restricting the development of encoders, complex structure, difficult installation and debugging, etc.
Inactive Publication Date: 2014-03-12
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology
Due to the shortcomings of traditional encoder detection systems (metal polygon detection, high-precision encoder detection) such as difficult installation and debugging, complex structure, weak versatility, and low cost performance, the application of encoders in modern technology fields is limited to a certain extent. development, so further research on the encoder detection system is imminent
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[0012] The structural features of the small-size high-precision encoder checking device in the present invention are specifically described below, see figure 1 , figure 2 As shown, the device consists of a rotation angle calibration mechanism and a transmission mechanism, in which:
[0013] 1. The rotation angle calibration mechanism is composed of an indexer 1, a laser generator 11, an interference mirror 12, and a mirror 13. The indexer 1 contains a multi-tooth indexing plate 4, and the rotation accuracy of the multi-tooth indexing plate is ±1", so this The device can check the accuracy of high-precision encoders (such as encoders with a resolution of 21 bits, 22 bits or higher precision). The upper surface of the indexer 1 is fixed with the reflector 13 through bolt connections, and the lower surface of the indexer 1 It is also fixed together with the tray 3 through bolt connection, so that the mirror 13, the indexer 1, and the pallet 3 have no relative movement. The inte...
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The invention provides a precision verification device for small and medium-sized high-precision encoders, and belongs to the technical field of general instrument precision verification. In existing encoder precision verification methods, the encoders are verified via a metal multi-faceted prism or an encoder with higher precision. The two methods have defects of being difficult to install and debug, complex in structure, low in generality, low in cost performance, etc. so that requirements for precision of the encoders in modern technology are difficult to meet, and precision verification of the high-precision encoders cannot be precisely realized. According to the precision verification device for the small and medium-sized high-precision encoders, precision of the detected decoders is directly verified by adopting a laser double-frequency interference principle and a multi-tooth indexing dial technology. Movement of the detected encoder is transmitted to an indexer loaded with the multi-tooth indexing dial via a simple set of transmission mechanism. After rotation of the detected encoders is finished, the multi-tooth indexing dial rotates rotation angle values outputted by the detected encoders in an opposite direction. Then laser calibration is performed on position of a reflecting mirror on the upper surface of the indexer so that rotation errors of the detected encoders can be acquired.
Description
technical field [0001] The invention relates to a device for precision checking of small and medium-sized high-precision encoders through the principle of laser dual-frequency interference and multi-tooth indexing disc technology, and belongs to the technical field of conventional instrument precision checking. Background technique [0002] As an important sensing component of an angle measurement and control system, the encoder has been widely used in many fields due to its advantages of high resolution and strong anti-interference. However, with the continuous expansion of its application field and the continuous improvement of precision, higher requirements are put forward for its detection system. Due to the shortcomings of traditional encoder detection systems (metal polygon detection, high-precision encoder detection) such as difficult installation and debugging, complex structure, weak versatility, and low cost performance, the application of encoders in modern techno...
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Inventor 于正林于博丁红昌曹国华姜涛
Owner CHANGCHUN UNIV OF SCI & TECH