| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ultrasonic flowmeter, capable of measuring a flow rate highly accurately with high efficiency by a transmitting-receiving vibrator, and composable simply by shortening an approach section in front of the transmitting-receiving vibrator. Ž<P>SOLUTION: One square tube wall 40 is arranged in a linear intermediate channel 21a. The square tube wall 40 has a rectangular opening which is similar to the linear middle channel 21a by each short-side side partition wall 40S, corresponding to each short-side wall part 21d of the linear middle channel 21a and each long-side side partition wall 40L, corresponding to each long-side wall part 21f. The square tube wall 40 is arranged as a nest, along a flow direction in the linear middle channel 21a, and forms a complex channel, formed by laminating concentrically double inner/outer channels 21a'. One circular communication hole 41 is formed penetrating in the width direction, corresponding to the measuring line of an ultrasonic beam on each short-side side partition wall 40S of the square tube wall 40, and each thin plate-shaped or sheet-shaped adjustment net 42, constituted of a reticulated material, is overlaid on each communication hole 41. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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