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Multi-degrees-of-freedom phase center robot

A phase center and robot technology, applied in the direction of using feedback control, etc., can solve the problems of large antenna test interference, antenna test failure, high manufacturing cost, etc., to ensure accuracy and real-time performance, rich measurable attitude angles, and reduce errors Anchor's effect

Inactive Publication Date: 2013-04-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
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Problems solved by technology

This equipment has the following disadvantages: first, the entire equipment is constructed of metal parts, and the more metal parts there are in the surrounding area of ​​the antenna, the greater the interference caused to the antenna test; second, the equipment parts are huge, the manufacturing cost is high, and the installation Debugging is difficult; third, only the polarization angle and pitch angle of the antenna can be adjusted, and the antenna cannot be tested in all directions in three-dimensional space

Method used

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Embodiment Construction

[0018] The purpose of conventional antenna testing is to test the signal receiving capability of the antenna in various directions in space. The change in the direction of the antenna mainly includes the polarization angle (rotating around the axis of the antenna) and the pitch angle (rotating around the phase center). The test equipment needs to provide motion adjustment capability in both orientations for the antenna placed on it.

[0019] The antenna bracket on the phase center robot can rotate along the O-O1 axis, so that the antenna polarization angle can be adjusted within the range of 0.0° to 360.0°. After the spatial position of the antenna phase center is determined, the antenna pitch angle θ1 can be adjusted within the range of 0.0° to 90.0° by adjusting the rotation angles θ2, θ3 and θ4. The high-precision absolute photoelectric code discs installed at the upper joint, middle joint and lower joint can monitor the changes of the rotation angles θ2, θ3 and θ4 in real ...

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Abstract

The invention designs a multi-degrees-of-freedom phase center robot with an adjustable phase center, which belongs to the field of conventional antenna test. The multi-degrees-of-freedom phase center robot is characterized in that an antenna bracket (1) can rotate around an own axis O-O1; the position of an antenna phase center (O) in a three-dimensional space and the degree of an antenna pitch angle (theta1) can be controlled by adjusting the rotation angles theta2, theta3 and theta4 of a manipulator; lower arms (4) of the robot can rotate around a vertical rotating shaft (5); and an antenna direction can be adjusted optionally in a lower semispherical space (6) in which the phase center (O) is taken as a circle center and the length of the antenna bracket is taken as a radius. In the entire structure of the robot, all parts except a joint driving motor and a sensor are made of a non-metallic composite material. The multi-degrees-of-freedom phase center robot has small interference on antenna testing, is provided with an adjustable antenna phase center, and is suitable for the application field which has comprehensive testing requirements on antenna performance.

Description

technical field [0001] The invention designs a multi-freedom phase center robot with adjustable phase center, which belongs to the field of conventional antenna testing. Background technique [0002] Antenna is an essential device for wireless devices to transmit and receive radio signals. Its quality directly affects the performance of wireless devices and has an important impact on the test of antenna performance. During the antenna test process, the polarization angle and pitch angle of the antenna need to be precisely positioned to test the ability of the antenna to receive radio signals at various angular positions in space. The most primitive antenna test is carried out manually, the measurement period is long and the error is large, so a special test system is required to test the performance of the antenna, and then an electric turntable is used to adjust the polarization angle and pitch angle of the antenna. [0003] In order to ensure that the phase center remains...

Claims

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Application Information

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IPC IPC(8): G05D3/12
Inventor 王志胜胡洲宋飞飞刘建中陈照海
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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