Low-cost and high-precision miniature scanning frame and control method thereof

Abstract

The invention discloses a low-cost and high-precision miniature scanning frame comprising an X-axis base and an industrial personal computer. X-axis guide rails are fixedly connected on the two sidesof the top part of the X-axis base, and a slide plate is slidably connected on the top part of the X-axis guide rails through X-axis slide blocks. An X-axis ball screw is rotatably connected on the top part of the X-axis base through a bearing pedestal. The external surface of the X-axis ball screw is connected with the bottom part of the slide plate in a threaded way. The invention relates to thetechnical field of communication test equipment. According to the low-cost and high-precision miniature scanning frame and the control method thereof, the cost can be greatly reduced and the detection precision can be enhanced, connection of the feedback line can be reduced, the control box is also simplified, the precision completely meets the antenna test requirement after multidimensional measurement and verification, the precision of system control can be greatly guaranteed through the semi-closed-loop system of the ball screw and the servo motor and thus the objective of ensuring the straightness and the flatness of the scanning frame mechanical linear guide rails can be achieved.

Description

technical field [0001] The invention relates to the technical field of communication test equipment, in particular to a low-cost, high-precision small scanning frame and a control method. Background technique [0002] The scanning frame is used to complete the amplitude and phase consistency test of each channel of the array antenna, and is a key component in the entire near-field measurement system. For antennas of different frequencies, scanning frames with different precision are required. For 40G antennas, the flatness of the scanning frame is 0.05mm (RMS) and the accuracy of positioning accuracy is ±0.05mm, which can meet the test requirements. If the ball screw and linear grating are used to design the scanning frame, the precision is high, but the cost is high. In order to reduce the cost and improve the cost performance of the test, a semi-closed-loop system formed by the ball screw and the DC servo motor is invented to design the scan. shelf. [0003] At present, ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a low-cost, high-precision, small-scale scanning frame and a control method, which solves the problem that the existing structural cost is high, and the semi-closed-loop system of the ball screw and the servo motor cannot be used to ensure the system The control accuracy cannot achieve the problem of ensuring the straightness and flatness of the mechanical linear guide rail of the scanning frame

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