基于FPGA和DSP的多参数现场噪声监测系统研究  

Research on noise monitoring system at multi-parameter field based on FPGA and DSP

作　　者：桂桂[1] 姚小兵[1] 万宇鹏 谢荣基[1] 李冬梅[1] GUI Gui YAO Xiaobing WAN Yu p en g XIE Rongji LI Dongmei(National Institute of Measurement and Testing Technology, Chengdu 6 1 0 0 2 1, China)

机构地区：[1]中国测试技术研究院,四川成都610021

出　　处：《中国测试》2017年第5期110-114,共5页China Measurement & Test

基　　金：四川省科技支撑计划项目(2013GZ0010)

摘　　要：在不同气象环境下声压级的测量会有不同结果,户外噪声监测装置大多只能监测噪声声压级大小。为实现户外环境下对噪声和气象参数的同时测量且满足JJG 1095——2014《环境噪声自动监测仪》的性能要求,使用户外传声器和六要素气象传感器采集信号,采用FPGA和DSP分别作为系统的控制核心和数据运算核心,开发可同步监测噪声和气象参数的多参数现场噪声监测系统。该系统利用双通道A/D转换技术达到在20 Hz^16 k Hz频率范围上20~140 d B的动态范围。按照规程要求分别使用标准信号源和标准声源发出的正弦电信号和粉红噪声进行验证实验,结果表明:该系统的频率计权测量误差满足要求,适用于户外环境下的多参数现场噪声监测。Most of outdoor noise monitoring devices can only monitor the sound pressure le v e l, but different meteorological environment will result in the change of sound pressure level. In order to realize the simultaneous measurement of noise and meteorological parameters in outdoor environment that meet the performance requirements in Automatic Monitoring of Environmental Noise （JJG 1095-2014）, outdoor microphone and 6 -factor meteorological sensor were adopted to collect signal. We aslo developed multi -parameter field noise monitoring system that can synchronously monitor noise and meteorological parameters by respectively adopting FPGA and DSP as control core and arithmetic core of the system. In this system, the dynamic range （ 2 0 - 1 4 0 d B ） of the system in the frequency range from 2 0 Hz to 16 kHz is implemented by using the two-channel A/D conversion technology. Finally, we used the standard signal source （sine） and standard sound source （pink noise） to test the device. The results show that weight measurement error of the system frequency meets requirements and is applicable to multi -parameter field noise monitoring under outdoor environment.

关 键 词：声学测量 双核心 多参数 远程校准 户外监测 

分 类 号：TN791[电子电信—电路与系统]