System and method for detecting phase centers of GPS (global positioning system) antennas by aid of continuous rotation processes

Abstract

The invention discloses a system for detecting phase centers of GPS (global positioning system) antennas by the aid of continuous rotation processes. The system comprises a base, a rotary table and a control unit. The rotary table comprises a support rod, a cantilever support plate, a rotary support bearing, a driven gear and a GPS antenna connecting rod; a stepper motor is fixed to a cantilever end of the cantilever support plate, a driving gear which meshes with the driven gear is arranged on an output shaft of the stepper motor, the stepper motor is connected with an encoder, and the encoder is used for feeding back rotation angles of the stepper motor; the control unit comprises a man-machine interaction module, a GPS time service module and a motor driver which are connected with a single chip microcomputer controller. The single chip microcomputer controller is connected with the encoder and is used for receiving rotation angle information of the motor, and the rotation angle information of the motor is fed by the encoder, so that closed-loop control can be carried out on the GPS antenna connecting rod. The system has the advantages that pointing directions of the antennas can be accurately changed by the system, and accordingly influence of observation errors such as multi-path effects can be effectively reduced; detection results are accurate, data are real, and the system is high in practicality.

Description

technical field [0001] The invention belongs to the field of GPS antenna detection methods and devices, in particular to a continuous rotation system composed of a rotary platform and a control system and a GPS antenna phase center detection method realized by the device. Background technique [0002] As a geodetic method, GPS observation plays an important role in geodynamic research and high-precision crustal deformation monitoring. The GPS observation equipment consists of a receiver and an antenna. The antenna is responsible for receiving satellite electromagnetic signals, and the receiver is responsible for setting the observation mode and processing the observation signals. In the field observation, the baseline vector between the observation antennas can be calculated by using the difference observation value formed by the synchronous observation data collected by two or more GPS devices. [0003] Due to the mechanical and electrical characteristics of the antenna it...

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Problems solved by technology

This method was proposed by the University of Hanover in Germany in 1997. It is currently considered to be the most accurate detection method. However, the research cost and difficulty of this technology are extremely high. At present, there is no mature product in China, which is not conducive to the detection of autonomous antennas such as the Beidou system.

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