环境噪声信源分析与特征辨识虚拟仪器系统研发

Research and Development of Virtual Instrument System for Environmental Noise Source Analysis and Feature Identification

针对传统的环境噪声监测与分析仪器功能单一化,提出了环境噪声连续实时监测与同步时频分析一体化的设计思想,自行开发了环境噪声信源特征分析与辨识虚拟仪器系统。其检测前端采用半球型电容声压传感器阵列,以PC机及其自带声卡为硬件,在LabVIEW软件平台上通过二次开发,实现环境噪声信号采集、参量计算、时频分析、声源类型判定多功能一体化。该虚拟仪器系统定位最大相对误差4.13%,测量声级分辨率0.01dB。

Aiming at the single function of the traditional environmental noise monitoring and analysis instrument,the design idea of the integration of continuous real-time monitoring of environmental noise and synchronous time-frequency analysis is put forward,and a virtual instrument system for the analysis and identification of environmental noise source features is developed.The detection front end adopts hemispherical capacitive sound pressure sensor array,takes the PC machine and its own sound card as the hardware,through the secondary development on the LabVIEW software platform,realizes the environment noise signal collection,the parameter calculation,the time frequency analysis,the sound source type judgment multifunction integration.The maximum relative error of the virtual instrument system is 4.13%and the sound level resolution is 0.01dB.