Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1987-07-09
1989-06-13
Eisenzopf, Reinhard J.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73 1R, 73661, 738656, 310334, 310321, 310336, 310337, 367 13, 367152, 367157, H01L 4122, G01L 2500, H04B 1700, H04R 2900
Patent
active
048380709
ABSTRACT:
A method of testing piezo-electric transducers includes locating one end (11) of a rod (10) of solid material over the active head (20) of the transducer, the rod (10) simulating the normal acoustic impedance presented to the transducer by the normal medium, in which the transducer is intended to operate, energizing the transducer and detecting the acoustic wave propagated through the rod at the other end of the rod. A loading rod for use in testing a piezo-electric transducer is an elongated solid body so dimensioned as to simulate the normal operating acoustic impedance presented to a piezo-electric transducer to be tested.
REFERENCES:
patent: 2572667 (1951-10-01), Ruggles
patent: 4099407 (1978-07-01), Louit
patent: 4331021 (1982-05-01), Lopez et al.
patent: 4430883 (1984-02-01), Aupan
patent: 4668909 (1987-05-01), Hickernell et al.
"Ultrasound Phantoms", ATS Laboratories, Catalog #10515, 9-7-81, pp. 1-4.
Edmonds Warren S.
Eisenzopf Reinhard J.
Marconi Instruments Limited
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