Clamp-on ultrasonic flowmeter and method for adjusting the clamp-on ultrasonic flowmeter
An ultrasonic and flowmeter technology, applied in the field of adjusting the clamp-type ultrasonic flowmeter, can solve problems such as insufficient alignment, and achieve the effect of robust signal processing
Active Publication Date: 2020-08-21
ENDRESS HAUSER FLOWTEC AG
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However, it has been found that such tilting only allows insufficient alignment of the ultrasonic contact transducers with each other
Method used
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[0045] Figure 1 a) shows an ultrasonic contact transducer 10 attached to the measuring tube wall 41 of a measuring tube 40 of an ultrasonic flowmeter, wherein the adjustment device 20 according to the invention is arranged between the transducer element 11 and the ultrasonic between the coupling elements 12 of the contact transducer. FIG. 1 b ) shows a further ultrasonic contact transducer 10 , in which the adjusting device 20 is now arranged between the coupling element 12 and the measuring tube 40 . The adjustment device has a coupling surface 21 which is acoustically and mechanically coupled to a coupling element 21 or to a measuring tube. The transducer element 11 is configured to generate and receive ultrasonic signals, wherein, in the case of FIG. In the case of 1b), the signal is first coupled from the ultrasonic contact transducer into the coupling element 12 and then passes via the adjustment device to the measuring tube. The arrows shown in FIGS. 1 a ) and 1 b ) ea...
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The invention relates to a clamp-on ultrasonic flowmeter (1) comprising: a measuring tube (40) for guiding a medium; a pair of ultrasonic contact transducers (10); an electronic measuring / operating circuit (30) for operating the ultrasonic contact transducers, wherein each ultrasonic contact transducer comprises at least one transducer element (11) for generating and detecting ultrasonic signals and a coupling element (12), wherein the transducer element is located on a first side of the coupling element (12.1), said side facing away from the measuring tube, and wherein the coupling element isdesigned to be acoustically coupled to the measuring tube via a second side of the coupling element (12.2), said second side facing the measuring tube, and to transmit ultrasonic signals between thetransducer element and measuring tube and vice versa, wherein the ultrasonic flowmeter comprises an adjusting device (20) for at least one first ultrasonic contact transducer (10.1) of the pair for adjusting the ultrasonic contact transducer, wherein the adjusting device (20) is arranged between the transducer element and the first side of the coupling element or between the measuring tube and thesecond side of the coupling element and comprises a coupling face directed towards the measuring tube, characterized in that the adjusting device is configured to modify at least one angle of the signal path with respect to the coupling face and / or a signal path length, wherein the adjusting device has at least two degrees of freedom.
Description
Background technique [0001] For example, a clip-on ultrasonic flow meter is used if the flow of a medium with high temperature and / or corrosiveness through a pipeline needs to be measured, where the use of an ultrasonic contact transducer in the pipeline would not be suitable. Furthermore, this avoids a relatively complex production of the measuring tube with the container for the ultrasonic contact transducer. However, wafer-on ultrasonic flow meters require alignment of the ultrasonic contact transducers of the wafer-on ultrasonic flow meter with each other, wherein the optimal alignment with respect to each other depends on the acoustic properties of the measuring tube and the medium. Prior art DE 10 2006 000 693 A1 discloses a clamp-on ultrasonic flowmeter in which a tilting device can be used to tilt the beam path of the ultrasonic signal in a plane including the axis of the measuring tube. However, it has been found that such an inclination only allows an insufficient a...
Claims
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IPC IPC(8): G01F1/66
CPCG01F1/662G01F1/667G01F25/10G01F15/185
Inventor 阿希姆·维斯特奥利弗·布伦贝格安德里亚斯·贝格尔
Owner ENDRESS HAUSER FLOWTEC AG