Hochiki Corporation

Yoshinori Kojima

Sadataka Yuchi

Naoya Matsuoka

Mitsuhiro Kurimoto

Haruchika Machida

Masamichi Kikuchi

Akira Furuyama

Munemasa Suzuki

Hiroaki Tsuru

Louis Fournier

Mashahiro Kii

A transmission processing unit is disposed in a terminal sensing device for a disaster prevention monitoring system. The transmission processing transmits a detection data to a central unit of the system, only when the detection data is equal to or higher than a predetermined level threshold and a difference between the detection data and a detection data of a preceding transmission is equal to or larger than a predetermined level difference threshold .DELTA.TH. Alternatively, the transmission processing unit transmits the detection data to the central unit of the system, only when the detection data is equal to or higher than the predetermined level threshold and a time period which is elapsed after the transmission of the preceding detection data is equal to or longer than a predetermined time period threshold.

Terminal sensing device for a disaster prevention monitoring system

A terminal of a disaster prevention monitor of the present invention detects the power-on of a terminal and sets flag information. When a polling call from a central monitor (receiver) is directed to a terminal after a power-on operation, the terminal transmits an information fetch request signal which requests the receiver enter an initialization routine for initialization of the terminal information. The receiver transmits an information request command signal to the terminal. The terminal transmits information to the receiver identifying the type of terminal which is responding. Depending on the type of terminal, the receiver may command test operations at the terminal and obtain the test results therefrom in order to generate and store proper initialization information about the terminal.

Disaster prevention monitoring apparatus and method

The present invention relates to an emergency supervisory system which comprises a plurality of supervisory apparatus provided for respective supervisory regions and connected in parallel with each other to signal lines derived from a central signal station; and switching devices which are provided at positions for separate the supervisory apparatus from each other and adapted to be closed normally and opened upon detection of short-circuiting to separate the supervisory apparatus adjacent thereto from the lines, thereby to supervise an emergency such as a fire through one or both of the signal lines.

Emergency supervisory system

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Tokyo, Japan

Yoshinori Kojima