描述了DSP 控制實現的明渠非接觸式流量計，對非接觸式流量計的數據采集結構及通信接口電路組成做了詳細討論。介紹了在多數據量采集以及實時處理的要求下，采用數字信號處理器TMS320LF2407A實現采樣運算的方案。采用FIR 算法對采樣數據進行數字低通濾波，將數據通過串行口傳送到上位機實現遠程監控。根據所提出的方案研制了一臺基于TMS320LF2407A 明渠污水流量計。
關鍵詞： DSP 污水流量計 多數據量采集 數字濾波 通信
Abstract: Describing the open channel flowmeter implementation based on digital signal processor TMS320LF2407A, discussing in detail data acquisition structure and communication interface circuit compositon. Under the demand for multi-data acquisition and real-time processing, adopting digital signal processor TMS320LF2407A to realize the scheme of sampling arithmetic. Accomplishing digital low pass wave filtering to sampling data with FIR algorithm, Realizing remote control through serial port and data is conveyed to upper
level computer. According to the schemes,developing a open channel flowmeter based on TMS320LF2407A.
Keywords: DSP；sewage flowmeter；multi-data acquisition；digital filtering wave；485 communication interface circuit