Fire monitoring system
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United States of America Patent
Stats
-
Nov 20, 1990
Grant Date -
N/A
app pub date -
Apr 4, 1989
filing date -
Apr 5, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a fire monitoring system for monitoring the occurrence of a fire in which a space to be monitored is imaginarily subdivided into plural subspaces so that plural channels passing through the subspaces are set so as to intersect to each other in a lattice form. The propagation speed of ultrasonic waves propagating through each of the channels is measured, on the basis of which the propagation speed of the ultrasonic waves in each of the subspaces is calculated in the same manner as the solution for each element of a matrix is obtained, and then the temperature in each of the subspaces is obtained. By providing the system with a humidity sensor, the temperature for a dry condition is obtained.
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Cited Art Landscape
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