An angle measurement method and system

Abstract

The invention relates to an angle measurement method and system, and belongs to the technical field of radar. The method comprises the steps of acquiring a first coordinate of a first preset mark point on telescope of a wind measurement radar and a second coordinate of a second preset mark point adjacent to the first preset mark point; acquiring a third coordinate of a preset mark point on a firstlight barrier plate, wherein the first light barrier plate can be used for shielding light beams emitted from a first lens cone; acquiring a fourth coordinate of a preset mark point on a second lightbarrier plate, wherein the second light barrier plate can be used for shielding light beams emitted from a second lens cone; and determining light giving-out angles of the first lens cone and the second lens cone according to the first coordinate, the second coordinate, the third coordinate and the fourth coordinate. Compared with the prior art, included angles among the light beams emitted fromthe lens cones are measured, the measurement result is true, the measurement accuracy is high, and accurate angle numerical values can be obtained.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to an angle measurement method and system. Background technique [0002] To measure wind speed and direction, wind radar needs to send out four beams with specific angles. Through the coherent detection system based on the principle of laser Doppler frequency shift, the precise measurement of the wind vector field can be realized. Wherein, the exit angle of the light beam is determined by the telescope. In order to meet the measurement requirements, the error of the light output angle of the telescope is required to be within 0.1°. Existing technologies generally use machine tools to ensure the processing accuracy of the telescope, or use a three-coordinate measuring instrument to measure some processing dimensions of the telescope, and invert the included angle of the telescope's lens barrel. Since the angles of the four lens barrels of the telescope are different, it i...

AI Technical Summary

Problems solved by technology

The price of this kind of processing equipment is very high, and there is no effective detection method after the processing is completed, so the processing accuracy of the telescope cannot be guaranteed

The processing size of the telescope is measured by a three-coordinate measuring instrument, and there is a large error in estimating the angle between the lens barrel of the telescope, and the feasibility of this scheme has not been confirmed so far.

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