Digital absolute position and displacement detection system and implementation method thereof
A technology for absolute position and displacement detection, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of high cost and difficult manufacturing of displacement detection systems, and achieve the effect of low cost and high use accuracy
Inactive Publication Date: 2013-06-19
DONGGUAN JINGHUIFA ELECTRONICS
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It aims to solve the problems of high cost and difficult manufacturing in the digital absolute position and displacement detection system in the prior art
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[0088] The present invention provides a digital absolute position and displacement detection system and its implementation method. In order to make the purpose, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0089] Please refer to FIG. 1 , which are schematic block diagrams a and b of an embodiment of the digital absolute displacement detection system of the present invention. As shown in the figure, the digital absolute displacement detection system includes: a quasi-point light source 100, a coding scale 200, a moving rail mechanism (not shown in the figure), an image detector 500a (CMOS camera) or 500b (linear array CCD), The image acquisition unit 300, the data processing unit 400, the decoding unit 600, the microprocessor 7...
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The invention provides a digital absolute position and displacement detection system and an implementation method thereof. The system comprises a quasi-point light source, a coding rod, a moving guide rail mechanism, a processing device and an image acquisition device, light emitted by the quasi-point light source irradiates the coding rod, the moving guide rail mechanism generates a certain displacement, the image acquisition device transmits acquired image information to the processing device for processing the image information, and the processing device respectively acquires an integer part and a fractional part of a position coordinate and then combines the integer part and the fractional part to obtain the complete position coordinate. High displacement measurement and control precision can be achieved at low manufacturing cost, high-precision cost is lower than 800 Yuan, and low-medium precision cost is lower than 500 Yuan. Besides, the defect of past 'incremental' digital displacement measurement is avoided by digital measurement for coordinate positions, starting reset, zero-position checking and the like are omitted, a real-time coordinate can be immediately read after starting, and measurement, control and remote measurement are quite facilitated.
Description
1. Technical field: [0001] High-precision position, displacement measurement and control devices are widely used in various fields of national economy, science and technology and military affairs. For example: machinery and equipment manufacturing department, measurement and testing department, on-site displacement monitoring and measurement, etc. It can not only measure the position coordinates and displacement, but also is widely used in the closed-loop feedback correction of the execution result of the displacement command of the control system, thus greatly improving the control accuracy. Take the precision valves used in large-scale petrochemical and nuclear projects as an example. Their opening and closing degree is affected by the multi-turn screw mechanism. Usually, the number of rotations is manually counted, which is extremely error-prone. It is even more inconvenient for sites that are not easy to reach, so telemetry position and displacement are very valuable. Th...
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IPC IPC(8): G01B11/00G01B11/03
Inventor 邱建朱勤
Owner DONGGUAN JINGHUIFA ELECTRONICS