| 摘要 |
The invention relates to a method for ultrasonic clamp-on flow measurement according to the transit-time method and to a device for carrying out the method. The invention is based on the aim of creating a method for clamp-on flow measurement and a device for carrying out the method, wherein the method compensates the deviation of the acoustic calibration factor caused by the measurement pipe, the method gets by without using a reference measuring device, and the sound transducers can be left in the installation position thereof on the measurement pipe. In the method according to the invention and the arrangement, the electromechanical transducer element of at least one of the two sound transducers is designed as an array having at least two array elements. A correction factor is determined from the comparison of the transit times between the transducers using various array elements. |
