REALIZATION OF THE ULTRASONIC LIQUID FLOWMETER BASED ON THE PULSE-PHASE METHOD

This paper describes the practical realization of an ultrasonic liquid flowmeter based on the pulse-phase method using modified tracking tec hnique. The flowmeter is realized as an embedded system. Its functiona l structure is comprised of: microcomputer, input-output electronics f or processing the ultrasonic signal, and blocks for timing and synchro nization. Software support is given through a global flow diagram. The main metrological characteristics of the realized liquid flowmeter ar e determined by using available working standards. The experiments hav e shown that the total error of the full scale flowmeter described her e is within the specified accuracy of 1%. This flowmeter can measure d ifferent kinds of liquids, and operates as an autonomous measurement e quipment or as a part of a complex measuring system intended for autom atic process control.