Ultrasound measuring device and method for monitoring the flow speed of a liquid

Abstract

The invention provides an ultrasound measuring device and method for monitoring the flow speed of a liquid. Theultrasonic measurement apparatus (10) has an ultrasonic measurement zone (36) with at least a pair of ultrasonic transducers (38), an evaluation unit for determining the flow velocity from a propagation time difference of ultrasound transmitted and received with and against the flow; a deflection unit, by means of which the fluid from the main flow direction is deflectable and suppliable to the ultrasonic measurement zone (36), wherein the deflection unit (20, 26, 32) forms a loop. In the method, the flow velocity is determined from a propagation time difference of ultrasound transmitted and received with and against the flow from a pair of ultrasonic transducers in an ultrasonicmeasurement zone and the fluid is deflected from the main flow direction and supplied to the ultrasonic measurement zone for the measurement, wherein the ultrasonic measurement takes place whilst thefluid is deflected such that it flows in a loop. It is the object of the invention to enable an accurate and simple ultrasonic measurement of flow velocities.

Description

Ultrasonic measuring device and method for measuring fluid flow velocity technical field The invention relates to an ultrasonic measuring device and a method for measuring the flow velocity of a fluid according to the preambles of claims 1 and 15 . Background technique The velocity of fluids in pipes and pipes can be determined by means of ultrasonic measuring technology according to the time-of-flight method. In this case, ultrasonic pulses are emitted and received by a pair of ultrasonic transducers which are arranged opposite one another transversely to the fluid flow on the line wall at the end of the measuring path. The flow velocity is determined from the difference in transit time of the ultrasonic waves along the measurement path in the downstream and upstream directions. Here, the ultrasound transducers work alternately as transmitter and receiver. Ultrasonic signals transmitted through a fluid are accelerated in the direction of flow and decelerated against the...

AI Technical Summary

Problems solved by technology

Due to the built-in measuring field, the leak-tight indication between inflow and outflow can only be performed with very high expenditure

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