Dynamic angle measurement error detector used in photo-electric axial angle encoder

Abstract

The invention relates to a dynamic angle measurement error detector used in a photo-electric axial angle encoder. A fixation part of a to-be-tested encoder is arranged on a base of the detector, a rotary part of the to-be-tested encoder is connected with a revolving shaft by a coupling joint, a polyhedron is fixed on the revolving shaft of the detector, a dynamic signaling autocollimation aims at a reflecting surface of the polyhedron, and a rotator of a torque motor is connected with the revolving shaft. During the detection, the torque motor is controlled by a computer to continuously rotate at a certain speed, and the revolving shaft, the rotary part of the to-be-tested encoder and the polyhedron are driven to rotate by the torque motor. When one operating angle of the polyhedron is turned, and the operating surface of the polyhedron is perpendicular to an optical axis, a trigger circuit sends out trigger impulses. Encoder values can be sampled after a data acquisition system probes trigger impulse signals. After the rotary part of the to-be-tested encoder rotates a circle, a group of sampling values can be obtained, and dynamic angle measurement errors of the to-be-tested encoder can be calculated by a data-processing system of the computer. The dynamic angle measurement error detector can be used for detecting the dynamic errors of the photo-electric axial angle encoder and has higher precision.

Description

technical field [0001] The invention relates to a precision detector for geometric quantities, in particular to a detector for dynamic angle measurement errors of photoelectric shaft angle encoders. Background technique [0002] Photoelectric precision tracking measurement, photoelectric observation and recognition technology of astronomical targets are the key technologies. In these fields, a number of significant and significant achievements have been achieved. After nearly 20 years of hard work, especially the rapid development of the past 10 years, photoelectric precision tracking measurement, astronomical target photoelectric observation and identification technology has developed from the primary stage to a higher technology stage, and is currently actively carrying out the research and development of a new generation of instruments and equipment. Tackling key problems. Since the speed of the target to be tested is getting faster and faster (aircraft, missiles, etc.),...

AI Technical Summary

Problems solved by technology

As the core precision angle measurement unit and speed feedback unit, the photoelectric shaft encoder directly affects the measurement accuracy and tracking performance of photoelectric precision tracking measurement, photoelectric observation and identification of astronomical targets, and the static accuracy and low speed of the photoelectric shaft encoder. The high accuracy has been proven in practice for many years, but its dynamic performance (dynamic angle measurement accuracy) has not yet been verified under the condition of high working angular velocity. In order to ensure the dynamic measurement accuracy and dynamic tracking performance of the new generation of instruments and equipment , it is urgent to solve the testing problem of dynamic angle measurement accuracy of photoelectric shaft angle encoder

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