JPS5884393A - Alarm monitor system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an alarm monitoring system for monitoring disaster prevention and crime prevention alarms from terminals housed in each of a plurality of terminal devices in a solid device.

In the conventional alarm monitoring method, when an alarm is detected in a terminal device that accommodates a single terminal sensor or multiple terminal sensors, the alarm is detected via a transmission line (a communication line using a normal telephone line) connected to the solid device. Alarm information was transmitted to the solid equipment, and alarm displays were performed on the solid equipment.

However, this method requires a transmission line for each terminal device, which increases the number of transmission lines in the system.
Also, the cost transmitter that receives alarm information has the disadvantage that it requires as many terminal devices as the number of terminal devices in the solid device, making the circuit complicated.

The purpose of this project is to eliminate the above-mentioned drawbacks, and by using the polling method, the number of lines to the solid equipment can be reduced, and nine receivers can be attached to the solid equipment. The goal is to make it possible to become a IIIJI.

Describing the configuration of the present invention, the present invention provides an alarm monitoring method for monitoring alarms from terminal sensors housed in each of a plurality of terminal devices in a solid device.
A plurality of terminal device groups made up of an arbitrary number of terminal devices accommodating an arbitrary number of 72-m terminal sensors, and any one terminal device designated from the terminal device group by a command from the solid device. #!
E is an alarm monitoring system using a communication line, which is connected to a single communication line and is comprised of a solid device that performs alarm detection and display by sequentially polling each of the terminal devices at high speed while controlling each of the line switching devices. It is a method.

The present invention will be explained below by way of examples with reference to the drawings.

FIG. 1 shows a schematic diagram of an embodiment of the present invention.

In FIG. 1, 1 is a terminal device, 21 to n are terminal devices, 3 is a line switching device, and 4 is a solid device.

Next, the operation of FIG. 1 will be explained. In FIG. 1, when the solid device 4 sends a signal calling 3 to the line switching device 3, the signal is received from 31 to 1.3.
only sends the received reply to 4. After confirming the reception, the solid device 4 sends out a switching signal to connect the line 1 of 3. (B)
When the line switching device 3 receives the signal, it connects the line 1 with the line from the solid device 4 and sends a switching completion signal to the line 4. When terminal device 4 receives the signal, terminal device 2 sends a signal to call terminal device 2 . Then 2 to 2 receives the signal,
Only 2 sends the state of 1 to 4. When 4 receives the reply signal, it next calls 2 and checks the state of snow l. In this way, check the status of 21 connected to line 301, and when this is completed, send a signal to switch line 3 from 1 to 2.
After switching by sending a message to the terminal device, the terminal devices are sequentially called in the same manner and the alarm status is checked. In this way, all terminals are called and the status of the alarm sensor is checked. At this time, by transmitting the call signal 9 answer value number at a high transmission speed, the display can be sent to the solid device within a short time from the occurrence of the alarm.

As described above, according to the present invention, an arbitrary number of line switching devices are inserted between a large number of terminal devices and a solid device to perform a polling method using 111I! 4, it is necessary to use only one communication line as a transmission path between the solid equipment and a relatively small number of line switching devices, and furthermore, only one communication line can be used as an alarm information signal receiver in the solid equipment. This has the advantage of significantly reducing material costs compared to conventional methods.

[Brief explanation of drawings]

FIG. 1 shows a professional circuit diagram of an embodiment of the present invention. The symbols used in the drawings indicate the following. 1~1...Alarm terminal sensor 21~m...
...... landing device, 3 ・Pa°°° line switching device, 4.
...Solid device. Figure l

Claims (1)

[Claims] In an alarm monitoring method that uses a solid device to monitor alarms from terminal sensors housed in each of a plurality of terminal devices, a plurality of a terminal device group, an arbitrary number of line switching devices that perform line switching to any one of the terminal device groups designated by a command from the solid device, and the arbitrary number of line switching devices; and a solid device that is connected by a communication line of approximately L (b) line between the terminals and that performs alarm detection and display by sequentially polling each of the terminal devices at high speed while controlling each of the line switching devices. An alarm monitoring method using communication lines characterized by: