|Improvement of Data Receive Ratio in Remote Water Meter System by Upgrading Sensor
Hiesik Kim and Odgerel Ayurzana
International Journal of Control, Automation, and Systems, vol. 7, no. 1, pp.145-150, 2009
Abstract : A remote Automatic Meter Reading (AMR) system was developed for water supply organizations and implemented in the field. To improve data acquisition, a water AMR sensor was modified. A water meter sensor with lower noise was introduced and efficient wireless transmission was studied. Low reliability of data acquisition was the most difficult problem in the field. A success ratio of at least 98% is required for stable and economical operation of an AMR. The ratio of reliable data acquisition in a trial AMR with image acquisition using a digital camera was only 67.8%, but tests using the improved sensor showed a reliable acquisition ratio of up to 97.38%. The MR (Magnetic Resistive) Reed switch and CYBLE sensor modules were simply mounted on mechanical water meters to achieve remote metering. The terminal was connected by a cable to the meter. For short distance transmission to a collector, RF (Radio Frequency) and Zigbee modules were used. For long distance transmission to a server, a CDMA cellular network was employed.
Keyword : AMR, CDMA, data receive ratio, remote measurement, RF, water meter, Zigbee.