Patent ID: 9140594
Filing Date: 2015-09-22
Classification: G01F

Abstract:
1. An ultrasonic, flow measuring device comprising: a measuring tube having a straight measuring tube axis; a transmitter for sending an acoustic signal on a first signal path; a receiver for receiving the acoustic signal on the first signal path; and at least a first reflection surface, on which the acoustic signal is reflected at least once on the first signal path, wherein: the acoustic signal incident on said first reflection surface propagates along a first straight subsection, which has a first separation from said measuring tube axis, wherein: said transmitter, said receiver and said first reflection surface are so oriented relative to one another and arranged in or on said measuring tube that the acoustic signal on the first signal path from the first transmitter to the first receiver is so reflected on said at least a first reflection surface that the acoustic signal reflected on the first reflection surface propagates on the first signal path along a second straight subsection through said measuring tube; the second straight subsection has a second separation from said measuring tube axis; the first separation differs from the second separation; and the sum of all lengths of all subsections of the first signal path as projected on said measuring tube axis and having the first separation from said measuring tube axis has a predetermined first value, and the sum of all lengths of all subsections of the first signal path as projected on the measuring tube axis and having the second separation from said measuring tube axis has a predetermined second value, said first value differs from said second value, and said first and said second values are other than zero, and a surface normal to the first reflection surface has an angle relative to said measuring tube axis, which is other than 90°.