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Optical pattern method for high-precision angle measurement

An angle measurement and high-precision technology, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve problems such as application limitations, and achieve the effects of fast and accurate identification of imaging directions, simple structure and principle, and easy operation

Inactive Publication Date: 2011-01-05
西安昂科光电有限公司
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  • Abstract
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Problems solved by technology

In addition, the circular grating method has the characteristics of high precision and dynamic fast measurement, but due to the limitation of domestic technology and manufacturing level, the application has been greatly restricted

Method used

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  • Optical pattern method for high-precision angle measurement
  • Optical pattern method for high-precision angle measurement
  • Optical pattern method for high-precision angle measurement

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Embodiment Construction

[0019] The present invention is described in further detail below in conjunction with accompanying drawing:

[0020] An optical graphics method for high-precision angle measurement: first, an optical imaging system 2, an image detector 3, and an image processing system 4 are sequentially arranged in front of the optical target to be measured, wherein the optical target 1 passes through the optical imaging system 2 and the image detector 3 secondly, after the optical target 1 passes through the imaging system 2, the image is collected by the image detector 3, and the collected image is processed and analyzed by the image processing system 4. The optical target 1 is any figure with directionality.

[0021] This measurement method is convenient for the operator to distinguish the angle and its direction through digital image processing technology; its working principle is: after the optical target 1 passes through the imaging system 2, the image is collected by the image detector...

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Abstract

The invention discloses an optical pattern method for high-precision angle measurement. The method comprises the following steps of: firstly, arranging an optical imaging system, an image detector and an image processing system in front of an optical target to be measured in turn, wherein the optical target is conjugated through the optical imaging system and an imaging surface of the image detector; and secondly, after passing the optical target through the imaging system, performing image acquisition by using the image detector, and processing and analyzing acquired images by the image processing system. The optical pattern method has the advantages achieving required properties of ultrahigh precision, real-time high speed and high resolution by selecting suitable components and corresponding software algorithms. In the method, a sub-micron array image detector and an advanced deep sub-pixel algorithm can be adopted to achieve the high enough measurement precision. Besides, the optical pattern method has the advantages of simple structure principle, wide application range, easy operation, quick and accurate identification of imaging direction, and can realize complete cycle angle measurement and the like.

Description

Technical field: [0001] The invention relates to a method for dynamic angle measurement with high precision based on the optical principle. Background technique: [0002] Angle is one of the most basic parameters of geometric quantities, and it is also a very important unit of measurement. Angle measurement is widely used and plays an important role in national economy and national defense construction. The earliest research on angle measurement technology is mechanical and electromagnetic angle measurement technology, such as multi-tooth indexing table and circular magnetic grid. The main disadvantages of these methods are mostly manual measurement, which is not easy to automate, and the measurement accuracy is limited. Many places can no longer adapt to new developments. Rotary gratings are one of the most commonly used devices in angle measurement. The grating used as an angle measurement reference can use the principle of average reading to reduce the reading error cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/26
Inventor 黄育争高文
Owner 西安昂科光电有限公司
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