Abstract
Problem statement: Although the traditional metering system and method for controlling flow is generally safe, reliable and robust, it does suffer certain drawbacks, such as limited accuracy and the ability to implement complex reactive rate designs. Hence, there is a need for a circuit and method of increasing metering accuracy, as well as the position control accuracy for variable flow rates, without further reliance on mechanical tolerances. An essential component for an electronic meter is a database and method of communication to obtain the required measurements and to program the meter for any additional needed values. Flexibility is added to such meters by using wireless communication circuits and protocols, which will enable reading of multi-devices from the same source point. Approach: To collect data, critical quality of service and carry out analysis, wireless flow meter reading system is designed, tested and implemented. The hardware and software in the designed system work together, to wirelessly receive readings from meters and then process it in order to obtain an accurate reading for the measured flow. The system makes use of modern communication algorithms and techniques. Also, the system allows for history tracing and analysis. The interfacing hardware uses two-way wireless optical interface to flow meter device. Results: The Hardware and Communication Protocol tested successfully and provided sufficient and accurate data for flow measurements analysis, presented in this research. Conclusion: Such hardware-software arrangement is considered a core for mobile meter reading and control with possibility to add intelligent security algorithms.
Highlights
The "front-end" sensory system is the heart of any measuring instrument that requires a given physical condition to be converted into an electrical signal
In this study we describes the design and operation of a wireless optical interface that together with designed software allows a PC to talk to the flow meter and retrieve energy consumption together with diagnostic and security information
Using a wireless optical interface provided a convenient method to access all manner of information held in a flow meter
Summary
The "front-end" sensory system is the heart of any measuring instrument that requires a given physical condition to be converted into an electrical signal. The source of measurement error cumulatively affects accuracy and resolution in a negative manner, sensory systems tend to obey the principle of "a chain only being as strong as its weakest link". Over the years it has become apparent that an overall measuring system is typically limited by less than ideal behavior of sensing devices. Ultrasound based flow meters are an efficient electronic measuring device and an accurate replacement to traditional ones. They make use of time of flight between ultrasonic transducers positioned in an appropriate manner along the path of flow
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