Design method of acoustic sensor by imitating ultra structure of orthoptera singing insect patagium

An acoustic sensor and ultra-microstructure technology, applied in the direction of frequency/direction characteristic device, etc., can solve the problems of complex acoustic sensor, unfavorable miniaturization of sensor, redundant structure of sensor part, etc.

Inactive Publication Date: 2011-04-27
NORTHEAST NORMAL UNIVERSITY
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Problems solved by technology

[0008] In order to overcome the shortcomings of existing acoustic sensors that are complex and unfavorable to the miniaturization of sensors, the present invention proposes a design scheme of an acoustic sensor imitating the wing membrane of Orthoptera song insects. Q value, making part of the sensor structure redundant

Method used

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  • Design method of acoustic sensor by imitating ultra structure of orthoptera singing insect patagium
  • Design method of acoustic sensor by imitating ultra structure of orthoptera singing insect patagium
  • Design method of acoustic sensor by imitating ultra structure of orthoptera singing insect patagium

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Embodiment Construction

[0029] Examples in specific embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0030] 1. Prototype sensitive component design

[0031] The prototype sensitive element refers to the smooth surface sensitive element, which is the basic template of the sensitive element of the orthoptera song insect wing membrane acoustic sensor. The prototype sensitive element determines the center frequency of the high and low Q value sensitive element, the starting point of Q value adjustment, the equivalent vibration mass, etc. Taking the sensitive element of a circular membrane acoustic sensor as an example, the normal frequency of the symmetrical vibration of a circular membrane with a fixed perimeter is

[0032] f n = μ n 2 πa T σ 0 ...

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Abstract

The invention belongs to the design of sensors, particularly relates to a design method of an acoustic sensor and puts forward a design scheme of the acoustic sensor by imitating the ultra structure of an orthoptera singing insect patagium for overcoming the defects that traditional acoustic sensors are complicated and not favorable for sensor miniaturization. In the technical scheme, a Q value is determined through the design of a fine structure on an acoustic sensor sensitive element surface to enable part of the structure of the sensor becomes redundant. Therefore, the Q value of the sensor can be enhanced to increase the sensor sensitivity and can also be reduced to widen the corresponding bandwidth of the sensor; particularly for a broadband sensor, the traditional damping structure in the acoustic sensor can be eliminated to greatly reduce the size of the sensor.

Description

technical field [0001] The invention belongs to sensor design, in particular to a design method of an acoustic sensor. Background technique [0002] 1. Basic method of acoustic sensor design [0003] In order to obtain the frequency characteristics of the required acoustic sensor, especially the relatively flat frequency response characteristics of the broadband sensor, three design schemes are often adopted. One is that the signal is in the stiffness control area of ​​the sensor system (f>>f 0 ), so that the amplitude response of the signal has nothing to do with the frequency; second, the signal is in the quality control area of ​​the sensor system (f<<f 0 ), so that the acceleration response of the signal has nothing to do with the frequency; these two control schemes belong to detuning control, and the symmetry of the frequency response curve is poor. The third control scheme is to make the signal in the force resistance control area of ​​the sensor system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/28
Inventor 任炳忠王寅亮刘侠尚利娜刘斐王双维
Owner NORTHEAST NORMAL UNIVERSITY
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