Acoustic wave detector
A technology of acoustic wave detector and flexible carrier, which is applied in the directions of instruments, measuring ultrasonic/sonic/infrasonic waves, measuring devices, etc., can solve the problems of single regulation mode of the acoustic wave detector, unfavorable detection of sound waves, etc., and achieve the effect of flexible frequency adjustment characteristics
Active Publication Date: 2019-03-19
山东鲁勘工程检测鉴定有限公司
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Problems solved by technology
[0007] The purpose of the present invention is to overcome the problem that the existing sound wave detector has a single control mode, which is not conducive to the detection of sound waves in a wide frequency range
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Embodiment 1
[0031] In order to overcome the problem that the existing acoustic wave detector has a single control method, which is not conducive to the detection of acoustic waves in a wide frequency range. The present invention provides a figure 1 The shown acoustic wave detector includes a substrate layer 1, which mainly plays a supporting role. The substrate layer 1 can be made of silicon dioxide, quartz, glass, etc., and a semiconductor layer 2 is provided above the substrate layer 1. , the semiconductor layer 2 can be electrically connected to an electrode of an external power supply, thereby forming a gate control voltage, and forming a controllable electric field between the graphene layer 5 and the semiconductor layer 2, through which the dielectric of the graphene layer 5 can be regulated Constant, an insulating layer 3 is provided above the semiconductor layer 2, and the insulating layer 3 isolates the detection voltage loaded by the graphene layer 5 and the gate control voltage...
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Abstract
The invention relates to an acoustic wave detector. The detector comprises a substrate layer above which a semiconductor layer is disposed, an insulating layer is disposed above the semiconductor layer, a flexible carrier layer is disposed above the insulating layer, a graphene layer is disposed above the flexible carrier layer, the acoustic wave detector is transmitted to the graphene layer by sound waves to cause deformation, a change in the dielectric constant of the graphene layer is caused, a change in the voltage applied by the graphene layer is detected, and the detection of sound wavesis conducted; the semiconductor layer of the acoustic wave detector can be electrically connected with a regulation voltage to control the dielectric constant of the graphene layer as a gate electrode or directly enter the graphene layer through an incident light to make the dielectric constant of the graphene layer change, and the dielectric constant of the graphene layer is regulated.
Description
technical field [0001] The invention relates to the technical field of acoustic wave detection, in particular to an acoustic wave detector. Background technique [0002] Acoustic detectors are becoming very important today, either as part of speech transmission devices or as part of photoacoustic detectors in gas analyzers for analyzing gases, eg ambient air. [0003] Commonly used acoustic wave detectors are constructed as capacitive detectors, which have two spaced-apart diaphragms defining a capacitor. One of the diaphragms is fixed and the other can be displaced by the sound wave to be detected. The displacement of the movable diaphragm determines the capacitance change of the capacitor, which can be detected by a suitable reading circuit and can be output as an electrical signal from which the properties of the sound wave to be detected, eg sound pressure, can be deduced. [0004] Although capacitive acoustic wave detectors are characterized by high sensitivity, they ...
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Patent Timeline
Login to View More IPC IPC(8): G01H11/06
CPCG01H11/06
Inventor 不公告发明人
Owner 山东鲁勘工程检测鉴定有限公司