-
Using Sound To Measure Temperature
-
-
-
A method to measure the real time temperature distribution along an interferometer path based on the propagation of acoustic waves is presented. It exploits the high sensitivity of the speed of sound in air to the air temperature. In particular, it takes advantage of a special set-up where the generation of the acoustic waves is synchronous with the amplitude modulation of a laser source. A photodetector converts the laser light to an electronic signal considered as reference, while the incoming acoustic waves are focused on a microphone and generate a second signal. In this condition, the phase difference between the two signals substantially depends on the temperature of the air volume interposed between the sources and the receivers. The comparison with the traditional temperature sensors highlighted the limit of the latter in case of fast temperature variations and the advantage of a measurement integrated along the optical path instead of a sampling measurement. The capability of the acoustic method to compensate the interferometric distance measurements due to air temperature variations has been demonstrated for distances up to 27 m.
-
-
-
CHAPTER ONE - [ Total Page(s): 3 ]In physics, sound is a vibration that propagates as a
typically audible mechanical wave of pressure and displacement, through a
medium such as air or water. In physiology and psychology, sound is the
reception of such waves and their perception by the brain.Sound can
propagate through compressible media such as air, water and solids as
longitudinal waves and also as a transverse waves in solids (see
Longitudinal and transverse waves, below). The sound waves are generated
by a sound ... Continue reading---
-
CHAPTER ONE - [ Total Page(s): 3 ]In physics, sound is a vibration that propagates as a
typically audible mechanical wave of pressure and displacement, through a
medium such as air or water. In physiology and psychology, sound is the
reception of such waves and their perception by the brain.Sound can
propagate through compressible media such as air, water and solids as
longitudinal waves and also as a transverse waves in solids (see
Longitudinal and transverse waves, below). The sound waves are generated
by a sound ... Continue reading---
ABSRACT -- [Total Page(s) 1]
Page 1 of 1
ABSRACT -- [Total Page(s) 1]
Page 1 of 1