Hochiki Corporation

Yasuo Torikoshi

Naoki Kosugi

Tetsuya Nagashima

A fire disaster monitoring system of the present invention has a control unit and a fire sensor. The fire sensor includes a sensor base and a sensor body. The sensor base incorporates a first memory which stores first address information of the first memory. The sensor body incorporates a second memory and a CPU therein. The second memory stores second address information of the sensor body. The CPU includes an address reader, a comparator and an address generator. When the power is turned on, the address reader reads the address information in the first memory, and reads the address information in the second memory. The comparator compares the read pieces of address information with each other. When the comparison result by the comparator indicates agreement, the address generator leaves the address information in the second memory as valid data. On the other hand, when the comparison result indicates disagreement, the address generator writes the address information in the first memory into the second memory.

System for monitoring disaster prevention

A photoelectric sensor of the present invention includes a light emitting device and a light receiving device for detecting scattered light due to smoke, a light emitting confirming device which lights up when a quantity of light received by the light receiving device is greater than or equal to a threshold and a test light emitting device for emitting light to the light receiving device during the test, wherein a blinking of the light emitting confirming device is started at a time of a test start, and a quantity of light received by the light receiving device is increased in steps so that the blinking is stopped when the quantity is greater than or equal to the threshold. Accordingly, the sensitivity test can be performed by visually counting the number of blinkings of the light emitting device.

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Tokyo, Japan

Yasuo Torikoshi