A method for ultrasound - transit time - quantity measurement

摘要

A method is proposed to the ultrasound - transit time - quantity measurement of a flowing fluid, in which the propagation time of an ultrasonic - signal (70) and with the flow (r) is measured and, from this, the flow velocity of the fluid is determined. In the proposed method, in addition, the reflections of the ultrasound - signal (70) of particles in the fluid is detected, in order to determine the concentration of the particles. In addition, it is a device for carrying out such a method is proposed which, is equipped with at least two ultrasound - transducers (32a, 32b, 34a, 34b, 36a, 36b, 38a, 38b), which are to be switched over from the transmitting state into a receiving state, wherein the ultrasound - transducer in the transmitting state to be able to emit ultrasonic signals (70), - by ultrasound transducers in the receiving state can be received, after reaching the fluid flow (20) to be examined have passed. At least one of the ultrasound - transducer (32a 32b, 34a, 34b, 36a, 36b, 38a, 38b) of the device is so rapidly from sending to receiving can be switched over, so that the reflections (e1, e2, e3) of the emitted signal (70) can be received. It is also possible for additional ultrasound - transducer (32c) can be provided, which are so arranged that they the reflections (e1, e2, e3) of the of the ultrasound transducers - in the transmitting state transmitted signal (70) can be received.