新型噪声频谱分析仪的原理与设计

Principle and Design of the New Noise Spectrum Analyzer

指出了原有频谱分析仪的设计缺陷,提出了应用开关电容滤波技术、数字检波技术等最新技术而设计的新型噪声频谱分析仪。它集频谱分析仪、积分声级计、噪声统计分析仪、数据采集器、数字式记录仪和噪声剂量计等多种功能于一机,其功能和精度经省科委鉴定,技术性能已居国内领先水平。着重阐述了其原理与设计。结果表明该仪器很好的满足了国内对于1型智能化噪声频谱分析仪的需要。

Based on the analysis of the limitations of traditional design of the noise spectrum analyzer (NSA), a new noise spectrum analyzer which adopted new techniques of the switch capacitance filter and digital demodulation was introduced. The NSA has integrated several functions of frequency spectrum analyzer, integrating sound level meter, noise statistical analyzer, data collector and etc. Evaluated by the Zhejiang Scientific and Technical Committee, the functions and the precision of the NSA have reached the domestic advanced level. Its principle and design are described. The result shows that the new NSA designed can perfectly meet the domestic demand of class 1 intelligent noise spectrum analyzer.