摘要
采用明渠均匀流理论通过实时检测渠道的过水深度实现对多种断面渠道流量的监测和计量,为此利用电容量随极板间介质变化的原理,设计了新型数字电容式水位传感器,测量结果不受温度和杂质的影响。电容信号检测使用高集成的电容数字转换器AD7746,提高了测量精度,并交由MSP430F149单片机进行处理。信号由单片机通过RS232总线传出,通过GSM网络进行无线传输,在监控中心,由RS232总线上传给上位机进行控制。由单片机和上位机均进行水位和流量的处理,数据分别在信号采集和监控处由LCD和上位机显示,实现水位流量的实时监测。
Based on the open channel uniform flow theory and through real-time detecting the channel＇s passing water depth, the real- time monitoring and measuring of multiple channel section flow rate is realized. A navel digital capacitive water lever sensor is de- signed hy using the principle of capacitance changed with dielectric constant between the two plates and the results do no vary with the temperature and impurities changing. A highly-integrated CDC AD7746 is used to detect capacitance signal to improve the meas- urement accuracy and processed by MSP430F149 micro-controller. The signal is transmitted by bus RS-232 and wireless GSM net and processed by the host computer at the control center. The MCU and host computer process the water level and flow rate and the data is displayed on LCD at the signal acquisition and the host computer at the control center,realizing the real-time monitoring of water level and flow rate.
出处
《中国农村水利水电》
北大核心
2013年第6期106-109,共4页
China Rural Water and Hydropower
