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Anti-disaster monitoring system and anti-disaster monitoring method

  • US 5,389,914 A
  • Filed: 09/05/1991
  • Issued: 02/14/1995
  • Est. Priority Date: 09/06/1990
  • Status: Expired due to Term
First Claim
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1. An anti-disaster monitoring system comprising a plurality of terminals;

  • a receiver connected to said plurality of terminals through a transmission path, said receiver including means for calling the terminals in sequence by transmitting calling signals each of which designates the address of one of said terminals, said terminals including means for transmitting a terminal response signal when an address designated in the calling signal coincides with a self-address of a terminal, and in which said receiver decodes the received terminal response signal and performs alarming or the like, each of said terminals having a group address setting section for setting a group address of a group consisting of a predetermined number of terminals on the basis of the self-address, and an interrupt transmitting section for transmitting a break signal which invalidates the terminal response signal on a timing when the terminal response signal is transmitted to said receiver from any of said terminals when an abnormality is detected to notify generation of an interrupt, and in that said receiver has an interrupt detection section for detecting an interrupt of the terminal when it receives the break signal on a timing when the terminal response signal is received, a calling control means for performing a sequential group calling by designating the group addresses when an interrupt detection output is obtained from said interrupt detection section, and a specification means for specifying the terminal in the group when a response signal is obtained from the group containing the terminal in which an abnormality is detected in response to the group calling made by said calling control means, said receiver having means for transmitting the calling signal for interrupt confirmation to the terminals when said interrupt detection section determines an interrupt from the received break signal to allow the terminal to transmit an interrupt level signal which indicates the cause of generation of the interrupt, and said interrupt level signal indicating an order of priority of the process for specifying the terminal in which an abnormality is detected on the basis of the abnormality detection data indicating the cause of generation of the interrupt.

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