Mass point vibration velocity sensor with wide response frequency band

A particle vibration velocity and sensor technology, applied in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problem of high noise, limit the application scenarios and application scope of particle vibration velocity sensors, and affect the impact of particle vibration velocity sensors on broadband sound. Signal detection, etc.

Active Publication Date: 2020-10-27
THE THIRD RES INST OF CHINA ELECTRONICS TECH GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance characteristics of this type of particle vibration sensor, such as response frequency band, sensitivity, and signal-to-noise ratio, are limited by various factors such as the structural size of the thermal resistance wire, the spacing of the thermal resistance wire, and the material selected for the sensor.
Therefore, the current particle velocity sensor is difficult to achieve a wide response frequency band u

Method used

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  • Mass point vibration velocity sensor with wide response frequency band
  • Mass point vibration velocity sensor with wide response frequency band
  • Mass point vibration velocity sensor with wide response frequency band

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, the sensor includes a sensing unit and a signal conditioning unit. The sensitive unit is composed of a plurality of sensitive subunits, and each sensitive subunit is used to collect the sound signal of the corresponding frequency band; it includes a signal conditioning unit, and the signal conditioning unit is used to amplify the electrical signal output by the sensitive unit, and to The electrical signals output by each sensitive subunit are synthesized.

[0030] Such as figure 2 As shown, each sensitive subunit is composed of two sensitive wires arranged in parallel, and the sensitive unit includes one central sensitive subunit and one or more outer sensitive subunits. In this embodiment, the central sensitive subunit The unit is composed of sensitive wires S11 and S12, and also includes an external sensitive subunit composed of sensitive wires S21 and S22, an external sensitive subunit composed of sensitive wires S31 and S32, an external...

Embodiment 2

[0035] Such as image 3 As shown, in the middle position between the sensitive wires S11 and S12 of the central sensitive sub-unit, there is a heating wire S0, through which the response effect of the sensitive unit can be further improved.

[0036] The remaining structures and working principles of the second embodiment are the same as those of the first embodiment.

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Abstract

The invention relates to a mass point vibration velocity sensor with a wide response frequency band. The sensor comprises a sensitive unit and a signal processing unit, wherein the sensitive unit consists of a plurality of sensitive subunits, each sensitive subunit is used for collecting a sound signal of a corresponding frequency band, and the signal conditioning unit is used for amplifying electric signals outputted by the sensitive unit and synthesizing the electric signals outputted by the sensitive subunits. According to the sensor, broadband response can be realized on the premise of ensuring the signal-to-noise ratio and sensitivity.

Description

technical field [0001] The invention relates to a particle vibration velocity sensor with a wide response frequency band. Background technique [0002] The acoustic signal contains two parameter values, the scalar sound pressure signal and the vector particle velocity signal, which respectively reflect different characteristics of the sound field. Source location tracking, sound field imaging and other aspects have broad application prospects in various fields such as aeroacoustics and hydroacoustics. For scalar sound pressure signals, it can be measured by various sensors such as electret condenser microphones. For the acoustic vector signal, the traditional measurement method is generally based on the principle of sound pressure gradient for indirect measurement, that is, through the gradient calculation of the sound pressure detected by two microphones at a certain distance, the particle velocity signal is obtained. [0003] The prior art most relevant to the present in...

Claims

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Application Information

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IPC IPC(8): G01H11/06
CPCG01H11/06
Inventor 谢奕周瑜魏晓村冯杰刘云飞
Owner THE THIRD RES INST OF CHINA ELECTRONICS TECH GRP CORP
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