Oblique crossing non-contact three-dimensional linear velocity and biaxial dynamic angle measurement system and method

Abstract

The invention discloses a skew non-contact three-dimensional linear velocity and biaxial dynamic angle measurement system and method. The device comprises a three-sliding-block horizontal displacementtable, three sets of vertical displacement tables and three laser vibration meters, wherein one laser vibration meter is installed on each set of vertical displacement tables, and biaxial dynamic angle measurement of an object can be achieved through two sets of three-dimensional linear velocity measurement units. The two sets of laser vibration meters are adjusted to be respectively focused at two different positions of the to-be-measured biaxial inertia measurement combination, the to-be-measured double-axis inertial measurement combination has three orthogonal motions, corresponding motioncoordinates are formed, the three-dimensional speed information of an object in a motion coordinate system can be calculated, the corresponding rotation angular speed information can be calculated through different positions of a selected to-be-measured point, and then the angle information is obtained through integration. The system can be used for inertial navigation device performance calibration, indexing mechanism calibration and other occasions, and has wide application prospects in the fields of aerospace, navigation positioning and the like.

Description

technical field [0001] The invention relates to the field of optical sensing and measurement, in particular to an oblique non-contact three-dimensional linear velocity and dual-axis dynamic angle measurement system and method. [0002] technical background [0003] Due to the advantages of low cost and small size, the dual-axis inertial measurement combination is very popular in the fields of photoelectric stabilization systems, flying chess control systems, and intelligent driving. In the development process of the inertial measurement combination, it is often necessary to calibrate the dynamic angle error of the inertial instrument by using testing equipment such as a linear vibration table and an angular vibration table. However, the traditional method cannot separate the error of the instrument from the error of the test equipment, so it is impossible to accurately evaluate the dynamic angle error. Angle error, which in turn affects navigation performance. Therefore, the...

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Problems solved by technology

[0006] In order to solve the defects of low sensitivity and precision of the non-contact angle measurement method in the prior art, the present invention provides an oblique non-contact three-dimensional linear velocity and dual-axis dynamic angle measurement system and method, using two sets of three-dimensional The linear velocity measurement unit realizes the dual-axis dynamic angle measurement of the object. Each group of three-dimensional linear velocity measurement unit contains three laser vibrometers and an adjustment component that can adjust the angle of the outgoing light. Through the adjustment component, the three measuring laser beams are obliquely Focusing on a certain position on the surface of the dual-axis inertial measurement combination to be measured, there are three orthogonal motions in the dual-axis inertial measurement combination to be measured, forming the corresponding motion coordinates, which can solve the three-dimensional velocity information of the object in the motion coordinate system, because the two A group of laser vibrometers are respectively focused on two different positions of the dual-axis inertial measurement combination to be measured, so the corresponding dual-axis angle information in the moving coordinate system of the dual-axis inertial measurement combination to be measured can be solved

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