Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1988-10-11
1988-10-11
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
2503591, G01P 368, G01P 336
Patent
active
047773685
ABSTRACT:
The specification discloses an apparatus and method for measuring the velocity of a moving mass. A noncontact heat source, such as a high powered infrared laser, intermittently heats and creates a hot spot on the moving mass in a first position in space. The heat source remains out of contact with a moving mass while heating it. A noncontact detector, such as an infrared heat detector, detects the hot spot at a second position in space and remains spaced apart from second position while detecting the hot spot. The second position is spaced a predetermined distance from the first position and, with respect to the first position, is disposed in the direction of the travel of the moving mass. The noncontact detector generates a detection signal when the hot spot is in the second position, and a monitor is responsive to the detection signal to determine when the hot spot is in the second position. The monitor also determines when the hot spot is created at the first position and it generates a monitor signal corresponding to the time elapsed (transit time) while the moving mass traveled from the first position to the second position. Thus, the monitor signal corresponds to the velocity of the moving mass.
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Hannaher Constantine
Howell Janice A.
University of Tennessee
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