Temperature and pressure measuring technique using the photoacou

Details Temperature and pressure measuring technique using the photoacou Temperature and pressure measuring technique using the photoacou

1990-10-05

1992-02-04

Williams, Hezron E.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73657, 7386259, G01N 2912, G01H 1300

Patent

active

050850806

ABSTRACT:
A method of measuring the temperature of a sample or alternately, the pressure surrounding a sample, consists of using the photoacoustic effect to measure the resonant frequency of the sample. By measuring the resonant frequency of an object, which varies with changes in the temperature of the sample and the pressure surrounding the sample, a greater signal-to-noise ratio is achieved, thereby increasing the accuracy and robustness of the disclosed method over previous methods of measurement using the photoacoustic effect. To determine the desired parameter, the resulting resonant frequency is compared to values on like samples (or on the sample itself) under known environmental conditions.

REFERENCES:
patent: 3726129 (1973-04-01), Thorne
patent: 4379226 (1983-04-01), Sichling et al.
patent: 4448525 (1984-05-01), Mikoshiba et al.
patent: 4468136 (1984-08-01), Murphy et al.
patent: 4521118 (1985-06-01), Rosencwaig
patent: 4529319 (1985-07-01), Muller
patent: 4557607 (1985-12-01), Busse
patent: 4655608 (1987-04-01), Goss et al.
patent: 4683750 (1987-08-01), Kino et al.
patent: 4713540 (1987-12-01), Gilby et al.
patent: 4724314 (1988-02-01), Caimi
patent: 4806760 (1989-02-01), McGlade
"Infrared-Laser Interferometric Thermometry: A Nonintrusive Technique for Measuring Semiconductor Wafer Temperatures", by V. M. Donnelly and J. A. MCaulley (J. Vac. Sci. Technol.) A 8(1) Jan./Feb. 1990.
"Contribution to the Interferometric Measurement of Sub-Angstrom Vibrations", by Th. Kwaaitaal (Rev. Sci. Instrum., vol. 45, No. 1) Jan. 1974, pp. 39-41.

Affiliated with

Also associated with

Rating

Temperature and pressure measuring technique using the photoacou does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Temperature and pressure measuring technique using the photoacou, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature and pressure measuring technique using the photoacou will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-341485