Detecting method and apparatus using a programmable memory devic

Details Detecting method and apparatus using a programmable memory devic Detecting method and apparatus using a programmable memory devic

1998-05-28

2000-05-09

Wu, Daniel J.

Communications: electrical

Condition responsive indicating system

Specific condition

340577, 340584, 340628, 73 2331, 73 3101, G08B 1710

Patent

active

060609915

ABSTRACT:
A detecting apparatus includes a processing device connected to a sensor, a programmable memory device and an alarm device. The sensor generates a signal output that varies according to a detected condition. The processing device includes a converting unit for converting the signal output of the sensor into a digitized value, a memory programming unit for storing a reference value in the memory device, and a comparing unit for comparing the digitized value from the converting unit with the reference value in the memory device. When the processing device is operated in a calibrating mode while the sensor is placed in a standard environment, the programming unit stores the digitized value from the converting unit as the reference value in the memory device. When the processing device is operated in the detecting mode while the sensor is installed in an environment to be detected, the processing device activates the alarm device upon detection by the comparing unit that the digitized value from the converting unit has exceeded the reference value in the memory device.

REFERENCES:
patent: 4420746 (1983-12-01), Malinowski
patent: 5473314 (1995-12-01), Mochizuki et al.
patent: 5526280 (1996-06-01), Consadori et al.
patent: 5530433 (1996-06-01), Morita
patent: 5543777 (1996-08-01), Vane et al.

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