A control system of a turntable verification device
A control system and verification device technology, applied in the direction of measuring devices, instruments, etc., can solve problems such as difficult installation, error, and complicated debugging process, and achieve the effects of improving efficiency, improving accuracy, and high anti-interference
Active Publication Date: 2018-11-06
BEIJING ZHENXING METROLOGY & TEST INST
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Problems solved by technology
In the existing turntable verification process, equipment such as multi-faceted prisms and photoelectric autocollimators are used for manual measurement verification. In this process, the installation is difficult, the debugging process is complicated, and the errors caused by man-made are relatively large. The test process has certain limitations. limitation
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[0021] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, where the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principle of the present invention.
[0022] figure 2 It is a schematic diagram of the verification device structure of the verification device provided by the embodiment of the present invention. The round grating is fixed on the turntable, and the angle of the turntable is measured in the control system according to the differential signal provided by the round grating and the interpolator.
[0023] Relying on high-precision circular gratings to complete the conversion of optical signals to electrical signals, the control system directly processes digital signals to complete angle measurement. This method adopts a more traditional verification method. One is to improve the accuracy of the verifi...
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The invention relates to a control system for a rotary table calibrating installation. The control system is characterized by including a signal preprocessing unit and a main control unit; the signal preprocessing unit receives three pairs of differential signals provided by a circular grating through a subdivision device, and conducts difference to single end treatment to convert the three pairs of differential signals into three paths of single-ended signal; the first path of single-ended signal is a reference zero position, and the second path of single-ended signal and the third path of single-ended signal have 90 DEG phase shift; the main control unit conducts exclusive or calculation on the second path of single-ended signal and the third path of single-ended signal to obtain a minimum system resolution; and the angle or rotation speed of the rotary table can be determined according to the minimum system resolution. The system provided by the invention can automatically test the angle and speed information of the rotary table, employs high-precision circular grating to achieve high-precision and automatic test of the rotary table.
Description
Technical field [0001] The invention relates to a verification device for an inertial test turntable, in particular to a turntable verification device control system that can automatically receive circular grating measurement information and complete verification work. Background technique [0002] The inertial test turntable mainly uses position and velocity functions to provide motion excitation for the inertial navigation system, and is used for the detection and calibration of inertial navigation systems such as gyroscopes and accelerometers. The verification device of the inertial test turntable is designed to meet the measurement requirements of the turntable. It guarantees the calibration and measurement accuracy of the inertial navigation system through the measurement verification of the angular position accuracy and angular rate accuracy of the turntable. [0003] The prior art verification device is attached figure 1 Shown. The verification device includes a polyhedral ...
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IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 邱少军胡志友李代松
Owner BEIJING ZHENXING METROLOGY & TEST INST