【作者】 曹湧；

【导师】 苏梅俊；

【作者基本信息】 合肥工业大学 ， 机械电子工程， 2002， 硕士

【摘要】 明渠(Open Channel)流动指的是具有自由流动表面的水流形式。本文所描述的明渠流量测量系统是用于对属于明渠流动范畴的城市和工矿企业的污水排放进行流量计量的。该流量测量系统采用卡发基水槽作为一次敏感器件实现了流量／水位的信号转换，并通过浮子—杠杆测量机构和磁阻式角度传感器对水位信号进行拾取并转化为电压信号输出。以单片机应用系统为核心的智能测量仪表负责对传感器的电压输出信号进行采集和处理，计算和显示出被测水流的瞬时流量和累积流量，并可根据所设定的单价实现水费的自动计价。本文对槽式流量测量的基本原理、卡发基槽和浮杆测量机构的设计、角度传感器的信号转换以及流量计算公式的推导做了全面的阐述；详细介绍了智能仪表应用系统的硬件电路设计和应用软件的开发及仿真调试；最后对测量系统的各项误差进行了分析和计算。更多还原

【Abstract】 The open-channel flowing refers to a kind of flowage which has the free surface. The open-channel flow-measuring system described in this paper is used for the measurement of the waste discharge in the city or from the factories. The flow-measuring system adopts the Khafagi flume as the first sense organ to realize the flow/head signal conversion. The head signal is picked up and converted into voltage signal by the buoy-level mechanism and the magnet-resistant angle measuring sensor. The intelligent measuring meter configured by SCM(Single Chip Microprocessor) system is to sample and process the voltage signal output by the sensor,calculate and display the value of instant flow and total flow. Furthermore,it can show the chargement according to the price of water set through the keyboard. This paper gives a comprehensive presentation about the fundamental of the flow-measuring method by flume,the design of Khafagi flume and the buoy-level mechanism,the signal conversion by the angle measuring sensor and the deduce of the flow equation. It also introduces the hardware design,the development and emulation on software of the intelligent measuring meter in detail. The error of flow measurement is analyzed and calculated in the end either.更多还原