Two-dimensional rotation angle detection method of spherical rotor space based on optical self-collimation principle
A spherical rotor and rotation angle detection technology, which is applied in the field of measurement, can solve problems such as measurement methods that have not yet been discovered, and achieve the effects of continuous dynamic angle measurement, simple data processing, high resolution and measurement accuracy
Active Publication Date: 2017-03-01
HANGZHOU DIANZI UNIV
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An image recognition device is installed outside the sphere, and the detected pattern is processed to obtain the angle information of the sphere. However, this measurement method has not been found in practical applications.
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[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0033] A two-dimensional rotation angle detection method for a spherical rotor space based on the principle of optical self-collimation, the specific steps are as follows:
[0034] Step 1, constructing a spherical rotor. like figure 1 As shown, the spherical rotor includes a rotating body and a transparent shell; the rotating body is a polyhedron 1 formed by a regular polygon rotating 180° around the central axis of rotation, and the rotating body is made of reflective material; the transparent shell is a hollow sphere inside, which is sleeved outside the rotating body. Wear-resistant materials are used to make the spherical rotor have good hardness and wear resistance. figure 1 Taking the regular octagon as an example, the central angle corresponding to each facet is 20°. The more sides of a regular polygon, the smaller the central angle correspondi...
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The invention discloses an optical auto-collimation principle based two-dimensional space turning angle detection method of a spherical rotor and aims to solve the problems that a conventional multi-dimensional turning angle detection technology of the spherical rotor is not mature and a traditional SDOF (single degree of freedom) angle displacement detection method is difficult to directly apply. The method comprises steps as follows: the spherical rotor is constructed; three photoelectric auto-collimator measurement device groups are uniformly arranged on the periphery of the equatorial plane of the spherical rotor, and each photoelectric auto-collimator measurement device group comprises an upper photoelectric auto-collimator measurement unit and a lower photoelectric auto-collimator measurement unit; parallel light emitted by a light source penetrates through a transparent casing through an upper parallel light tube or a lower parallel light tube and irradiates a polyhedron, and reflected light deflects with deflection of the spherical rotor and is imaged to a corresponding high-speed linear array CCD (charge coupled device) camera through the upper parallel light tube or the lower parallel light tube; a forward deflecting angle of the spherical rotor relative to a vertical shaft is obtained by the three photoelectric auto-collimator measurement device groups, and a deflection angle and an azimuth angle of the spherical rotor are calculated. The method is based on the optical auto-collimation principle and has high resolution and high measurement accuracy.
Description
technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a two-dimensional rotation angle detection method of a spherical rotor space based on the principle of optical self-collimation. Background technique [0002] Traditional angle measurement is mainly based on single-degree-of-freedom moving objects, and there are usually methods such as mechanical angle measurement, electromagnetic angle measurement and optical angle measurement. Among them, the research and application of optical measurement technology has developed rapidly. Due to different angle measurement methods, there are various types of detection instruments, such as photoelectric encoder method, circular grating method, laser interference method, ring laser method, etc., most of which are used in small angles. Higher resolution and measurement accuracy can be obtained in the precise measurement of 360° full-circle angle measurement, but appropriate improv...
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IPC IPC(8): G01C1/00
CPCG01C1/00
Inventor 王文张敏卢科青时光范宗尉袁科杰程林赵鼎成
Owner HANGZHOU DIANZI UNIV