Transducer structure and mounting arrangement for transducer str

Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy

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G01F 166

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active

044258038

ABSTRACT:
A transducer crystal is coupled to a coupling plastic material made of a compression molded polyimid amide. Two cooperating transducer housings are formed of two wedges of material cut from the same rectangular billet. The wedge angle is calculated after measuring the sonic velocity of the billet. A novel buffer is applied to the rear surface of the transducer crystal and consists of an epoxy body having tungsten powder and small particles of an elastomer distributed therein. The transducer body is mounted on a support track which has a similar configuration for numerous different mounting arrangements. The transducer housings are axially spaced from one another along the axis of the pipe and are set to a given spacing by locating a mounting clip on an index plate on the track. Transducers for a portable type application have tracks connected to one another along one of their sides by a flexible but tough sheet of material which fixes the spacing of the tracks for a given pipe diameter. The opposite rails of the two tracks are connected together by a quick release strap arrangement.

REFERENCES:
patent: 3050997 (1962-08-01), Lake
patent: 3987674 (1976-10-01), Baumoel
patent: 4019373 (1977-04-01), Freeman et al.
patent: 4286470 (1981-09-01), Lynnworth
Lynnworth-. . . "Clamping-on Ultrasonic Flowmeters Limitations and Remedies" Instrumentation Technology, vol. 22, No. 9, pp. 37-44, Sep. 1975.

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