Method and arrangement for ultrasonic clamp-on flow measurement and circuit arrangement for controlling an ultrasonic clamp-on flow measurement

摘要

The invention relates to a method and an arrangement for ultrasonic clamp-on flow measurement according to the transit time method. The invention has for its object to provide a measuring arrangement for clamp-on flow measurement, which offers the ability to measure both in reflex arrangement as well as in X-arrangement with only two Schallwandlerpaaren without the sound transducer position must be changed when switching between the arrangements , For the inventive method at least four sound transducers are arranged on a measuring tube, which are controlled in such a way that the flow measurement takes place alternately successively in an X arrangement and in reflex arrangements. For this purpose, two transducers are each connected to a respective transceiver pair for a flow measurement in an X-arrangement or two transducers each to a transceiver pair for two reflex arrangements.