Electret mechanical antenna charging effect evaluating method

An electret, mechanical technology, used in antenna radiation patterns, measuring electrical variables, measuring devices, etc., can solve problems such as unfavorable communication, weakened signal strength, and unsustainable charge density for a long time, and achieve the effect of ensuring consistency.

Inactive Publication Date: 2019-08-20
BEIHANG UNIV
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Problems solved by technology

At the same time, the charge density stored by the electret cannot be maintained at a high level at the time of completion for a long time, but will continue to decay to a low level over time, so the signal strength generated by the mechanical antenna based on the electret It will also weaken, which is undoubtedly not conducive to communication. In order to solve this problem, the electret needs to be charged regularly. However, how to know the remaining charge of the electret in time without dismantling the mechanical antenna is also a Difficulties that must be faced in the long-term use of electret mechanical antenna

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  • Electret mechanical antenna charging effect evaluating method
  • Electret mechanical antenna charging effect evaluating method

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Embodiment Construction

[0008] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the specification of the present application. Obviously, the described embodiments are only for illustration, and are not intended to limit the present application.

[0009] The present invention provides a method for evaluating the charging of electret-based mechanical antennas. The charging effect measurement module is used for measuring the charge density distribution of the electret during charging and for adjusting and controlling the feedback of the charging device. said figure 1 The schematic diagram in the figure describes a rotating charging effect measurement module, which is composed of a surface potential sensor probe 1 , a sensor bracket 2 , a rotating shaft 3 , and an electret placement platform 4 . Several surface potential sensor probes are fixed on the sensor bracket, and the bracket is ...

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Abstract

The invention relates to the technical field of low frequency communication and plasma and provides a method of evaluating charging of an electret-based mechanical antenna. The evaluating system comprises two parts of a charging effect measurement module and a remaining power measurement module for measuring and evaluating the charge amount of the electret in the case of charging and in a using process with charging already completed. The charging effect measurement module adopts a method of combining multiple probes and a moving probe, the charge density graphical distribution is acquired byscanning the electret, a charging device is thus controlled with the graphical distribution as feedback, and thus, the electret obtained by charging at each time can reach a consistent index. The remaining power measurement module adopts a method of fixing the position of a receiving antenna and fixing the operation mode of the mechanical antenna, the remaining charge amount of the electret is calculated through signal intensity, and when the charge amount is low, a user is reminded to supplement charges for the electret.

Description

technical field [0001] The invention relates to the field of electric plasma technology and the field of low-frequency communication, in particular to a method for evaluating the charging effect and remaining charge of an electret type mechanical antenna by using surface potential measurement and a mechanical antenna receiving antenna. Background technique [0002] Electrets are dielectric materials that can store dipole charges or space charges (true charges) for long periods of time. An electret-based mechanical antenna is a device that drives an electret in mechanical motion to generate a radio signal. Compared with the ferromagnetic materials of permanent magnets, there are various types of electret materials. Many materials such as PTFE, FEP and other polymer materials have low density and light weight. Therefore, mechanical antennas based on electret materials also have the characteristics of light weight. However, when preparing the electret, how to ensure that the e...

Claims

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Application Information

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IPC IPC(8): G01R29/24G01R29/10
CPCG01R29/10G01R29/24
Inventor 崔勇宋晓李良亚王琛
Owner BEIHANG UNIV
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