A time-dependent vibration test device for cable-net antenna metal mesh

Abstract

The invention provides a time-effect vibration test device for a cable-net type antenna metal mesh, which includes a vibration frame, a slide bar assembly, a slide plate assembly, rollers, counterweights, a vibration source, and a DC power supply. The vibrating frame is a supporting frame. The slider assemblies are evenly arranged on the upper frame. The slide assembly is slidably arranged on a plurality of slide bars. The rollers are respectively supported on the two long sides of the upper frame. Multiple vibration sources are evenly arranged on the bottom surface of the upper frame, each vibration source includes a DC motor, and an eccentric wheel is arranged on the output shaft of the DC motor. A plurality of counterweights are evenly suspended on the four sides of the metal mesh to be tested, and are suspended around the upper frame through two rollers and pulleys at both ends of the plurality of slide bars. It can effectively improve the curve characteristics of the creep of the metal mesh, and better improve the effect of the metal mesh treatment.

Description

technical field [0001] The invention belongs to the technical field of large antennas, and in particular relates to a time-dependent vibration test device for a cable-net type antenna metal mesh. Background technique [0002] The metal mesh is one of the main components of the large-scale cable-net antenna, and it is the carrier that completes the radio wave reflection. According to the different requirements of each communication frequency band, the demand for surface accuracy is also continuously increasing. For high-frequency mesh antennas In other words, in addition to requiring high surface accuracy, the stability of the antenna mesh surface during repeated folding and unfolding must also be guaranteed. Therefore, before the metal mesh reflector is formed, it is necessary to pre-treat the metal mesh to improve the uniformity of the mesh surface aperture, release the mesh surface stress, reduce or eliminate the viscoelasticity of the metal mesh, optimize the creep charac...

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Problems solved by technology

[0003] In the past, the metal mesh used for low-precision and low-frequency mesh antennas was processed by applying static tension. The tooling device used was only a simple frame. The disadvantage of this device is that the aging time is long, and the mesh surface stability treatment effect bad

Although, in the prior art, the method of vibration aging is also applied in the pretreatment of high-precision metal mesh, but in the configured tooling device, the vibration source is only connected to a screw on the motor shaft, resulting in metal The amplitude of the net is large; the selected motor has low operating frequency, high power, high noise, and low efficiency; this leads to a long test period; and the power supply method is mostly alternating current, and the safety design is lacking; there is no slide cylinder when a constant tension is applied The structure of the nail, the uneven tension on the metal mesh, affects the uniformity of the mesh

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