| 摘要 |
Disclosed is a method for the ultrasonic measurement of the running time and quantity of a flowing fluid, in which the running time of an ultrasonic signal (70) is measured counter to and in the direction of the flow (5), wherefrom the flow rate of the fluid is determined. According to the inventive method, the reflections of the ultrasonic signal (70) on particles contained in the fluid are also detected so as to be able to determine the concentration of particles. Also disclosed is a device for carrying out such a method. Said device comprises at least two ultrasonic transducers (32a, 32b, 34a, 34b, 36a, 36b, 38a, 38b) which can be switched from a transmission mode to a reception mode. The ultrasonic transducers that are in the transmission mode can transmit ultrasonic signals (70) which can be received by ultrasonic transducers that are in the reception mode once said signals (70) have penetrated the flow of fluid (20) that is to be analyzed. At least one of the ultrasonic transducers (32a, 32b, 34a, 34b, 36a, 36b, 38a, 38b) of the inventive device can be switched from the transmission mode to the reception mode so quickly that said ultrasonic transducer can receive the reflections (E1, E2, E3) of the transmitted signal (70) thereof. The inventive device can also be provided with additional ultrasonic transducers (32c) which are arranged such that said additional ultrasonic transducers (32c) can receive the reflections (E1, E2, E3) of the signal (70) transmitted by the ultrasonic transducers in the transmission mode. |
