Digital Environmental Noise Monitoring System Based on B/S Architecture and Floating-Point DSP

This paper proposes a novel structure and realization scheme of digital noise monitoring system based on B/S (Browser/Service) architecture and floating-point DSP. A robust, high accurate, real-time system using floating-point DSP (TMS320C6713) chip as core processor to design a high precision IIR filter for frequency weighting and the high-performance C8051F120 single chip processor as data collection and port controller is presented. In the B/S architecture, the noise data is transmitted through GPRS with SIM300, stored in the server computer using socket communication technology and displayed in the remote Web browser in a multi-terminal, multi-channel and real-time way. The accuracy of frequency weighting meets the International Electrotechnical Commission Standard IEC61672-2002 class I, and the dynamic range is more than 90 dB. Regardless of ambient temperature changes, the system can work accurately form -40 to 85 degrees, which is much better than the analog devices.