ULTRASONIC MULTI CIRCUIT SPEED MEASUREMENT, ULTRASONIC MULTI CIRCUIT FLOW MEASUREMENT AND ULTRASONIC DISTANCE MEASUREMENT

摘要

An ultrasonic multi circuit speed measuring method, an ultrasonic multi flow measuring method, and an ultrasonic distance measuring method are provided to accurately measure flow of fluid in a stream tube by the use of a flow rate and a vertical distance between speed measuring circuits. An ultrasonic multi circuit speed measuring method includes the steps of: preparing ultrasonic flow measuring circuits to be apart from each other in a direction perpendicular to an advancing direction of fluid(M101); measuring a flow rate of fluid passing between two ultrasonic oscillators of the ultrasonic flow measuring circuits by calculating a difference between ultrasonic oscillators by measuring a difference between a time from a point of time at which an ultrasonic wave is generated in one ultrasonic oscillator to a point of time at which the ultrasonic wave is received by the other ultrasonic oscillator and a time from a point of time at which the ultrasonic wave is generated in the other ultrasonic oscillator to a point of time at which the ultrasonic wave is received by the one ultrasonic oscillator(M102); measuring a flow rate of fluid passing between an upstream ultrasonic oscillator and a downstream ultrasonic oscillator adjacent to each other(M103); and measuring a flow rate of fluid passing on a line parallel with the two ultrasonic flow measuring circuits(M104).