Apparatus for measuring ultrasonic power

Details Apparatus for measuring ultrasonic power Apparatus for measuring ultrasonic power

2005-12-27

2005-12-27

Chapman, John E. (Department: 2856)

Measuring and testing

Vibration

By mechanical waves

C073S646000

Reexamination Certificate

active

06978677

ABSTRACT:
An ultrasonic power meter is provided for measuring ultrasonic power emitted by a device (18) under test. The meter includes a casing forming a chamber (16) within which an ultrasonic absorber (14) formed from polyurethane material is located. Overlying the absorber (14) is a membrane (12) of polyvinylidene fluoride which acts as a pyroelectric detector. The meter also includes a transfer medium (10), typically water, for allowing the transfer of ultrasonic energy emitted from a device (18) under test to the meter.

REFERENCES:
patent: 4323077 (1982-04-01), Smith
patent: 5508546 (1996-04-01), Zalameda et al.
patent: 5962773 (1999-10-01), Cho
patent: 6469302 (2002-10-01), Kubo et al.
patent: 1003985 (1965-09-01), None
“The Thermoacoustic Effect and Its Use in Ultrasonic Power Determination” by Fay et al., Elsevier Ultrasonics 34 (1996), 563-566.
“Time Response Modelling of an Ultrasonic Thermoelectric Probe” by Romdhane et al., Elsevier Ultrasonics 34 (1996) 835-845.

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