Rotary table/swing table with high-frequency angle measurement mechanism and angle measurement method

Abstract

The invention discloses a rotary table/swing table with a high-frequency angle measurement mechanism and an angle measurement method, and relates to the technical field of angle measurement, the rotary table/swing table comprises the high-frequency angle measurement mechanism, an upper computer controller and a plurality of encoders, and the encoders are installed at the pitch axis end and the azimuth axis end of the rotary table/swing table. Each encoder is connected with a high-frequency angle measurement mechanism through a corresponding connecting piece, and the high-frequency angle measurement mechanism is connected with an upper computer controller; the high-frequency angle measurement mechanism comprises a delay error detector, an error calibrator, a clock generator, a data receiver, a global clock generator and a multi-path switcher, the multi-path switcher is connected with the encoder and performs information interaction with the encoder, and one end of each of the delay error detector, the clock generator and the data receiver is connected with the multi-path switcher, and the other end is connected with the error calibrator. The high-frequency servo control system has high feedback frequency and can meet the high-frequency control requirement of the servo control system.

Description

technical field [0001] The invention relates to the technical field of angle measurement, in particular to a turntable / swing table with a high-frequency angle measurement mechanism and an angle measurement method. Background technique [0002] With the rapid development of modern industry, high speed and high precision have become the development trend of servo drive system, and position detection is one of the keys to determine the performance of servo system. Photoelectric digital encoder is a high-precision measurement commonly used in industrial measurement systems The instrument, with the advantages of high precision and strong anti-interference ability, has become a commonly used angle measuring component in the current servo drive system, and is widely used in aerospace, shipbuilding, and machinery manufacturing. [0003] The photoelectric digital encoder is one of the main components of the servo control system, and its control accuracy and tracking accuracy largely ...

AI Technical Summary

Problems solved by technology

[0008] If, on the basis of the above-mentioned traditional angle measurement algorithm, the clock frequency of 10MHz is directly used to measure the angle, the following will happen: image 3 In the case of data misalignment shown, since the clock is increased to 10MHz, and the cycle is only 100ns, the transmission delay time T is several times of the 100ns cycle, which will affect the angle measurement cycle. In the figure, the highest bit of data Misalignment to the START start signal, the second bit of data is misaligned to the "0" bit signal, which will cause the overall data misalignment, and the angle measurement feedback of the system cannot be completed. Therefore, in the traditional angle measurement process, the clock frequency must be actively reduced , to ensure the correctness of the data and avoid data misalignment

[0009] However, if the frequency is too low, it will prolong the time to read a frame of angle value, and an angle data can only be updated every 100us. The angle measurement feedback is only 10KHz, and with the improvement of the real-time performance requirements of the turntable / swing table, the feedback and control of 10KHz have already been achieved. Cannot meet the requirements of the control system

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