JPH0158556B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an abnormality intensive monitoring system for intensively monitoring fires, gas leaks, etc.

In recent years, when connecting an alarm line with a large number of fire detectors etc. to a receiver for intensive monitoring,
Intensive abnormality monitoring using the so-called polling method, in which an address is assigned to each sensor, the sensor is called by the address from the receiver side, and only the called sensor sends out information such as fire detection signals. A method has been developed. Normally, the receiver sequentially calls a large number of sensors (hereinafter referred to as terminal devices) each connected to a plurality of alarm lines using a data processing device built into the receiver. By collecting information, we centrally monitor abnormalities such as fires and gas leaks. Therefore, in order to capture abnormality information from a large number of terminal devices in a short period of time, for example within 5 seconds, it is necessary to increase the transmission speed of data transmitted over the alarm line, which requires a high quality transmission line. Not economical. That is, there is a drawback that the number of terminals that can be centrally monitored is limited by the data transmission speed of the alarm line.

The purpose of the present invention is to solve the above-mentioned conventional drawbacks and
To provide an abnormality intensive monitoring system capable of capturing an abnormal signal into a receiver within a short time without increasing the data transmission speed of an alarm line.

In the monitoring method of the present invention, a transmission alarm line extending from a receiver is branched into a plurality of alarm lines in the middle, a plurality of terminals are connected to each of the plurality of alarm lines, and the plurality of terminals are connected to the In the abnormality centralized monitoring method, which monitors abnormalities such as fires and gas leaks by calling sequentially by polling from the receiver and collecting information from each terminal, any of the terminals connected to the same alarm line An interrupt line for sending an interrupt signal to the receiver upon detection of an abnormality in the terminal device is provided corresponding to the alarm line, and upon receiving the interrupt signal, the receiver transmits an interrupt signal to the alarm line corresponding to the interrupt line. The present invention is characterized in that the connected terminals are sequentially called with priority.

Furthermore, an idling period is provided between the calling signals from the receiver to each terminal device, and the plurality of terminal devices are divided into groups, and an interrupt signal capable of identifying each group is sent out during the idling period. This eliminates the need to provide a separate interrupt line.

Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment of the present invention. . That is, the receiver has a data processing device 1 and a modem 2, a transmission alarm line is connected to the modem 2, and this alarm line is branched into a plurality of alarm lines L ₁ to Ln in the middle, and the alarm line Terminals D ₁ -Dm are connected to L ₁ -Ln, respectively. A unique address is determined for each terminal device, and alarm lines L ₁ to Ln are connected from the data processing device 1 via the modem 2.
When a specific address signal is sent to the terminal, each terminal device identifies the address signal and sends fire information etc. when it is designated. The information is taken into the data processing device 1 via the modem 2. The data processing device 1 normally calls the large number of terminals in sequence, collects information from each terminal, and intensively monitors the information. To call all terminals, for example, the time required to poll one terminal
If Tp is 10 milliseconds and the number of terminals is 5000, it will take about 50 seconds. The above-mentioned centralized monitoring confirms that the terminal device is operating normally. When some type of trouble is detected (for example, a gas leak detector is unplugged, a terminal device is malfunctioning, etc.), prompt repair is required, but as mentioned above, it usually takes minutes or hours to repair a problem. of
A time of 50 seconds is not a problem. In addition, each terminal
Since D ₁ -Dm are never called at the same time, a plurality of alarm lines L ₁ -Ln can be connected to one modem. It goes without saying that the modem 2 is not required when the signal on the alarm line is a DC signal.

On the other hand, interrupt lines F ₁ -Fn are wired corresponding to the alarm lines L ₁ -Ln, respectively. When any of the terminals D ₁ to Dm connected to the same alarm line detects an abnormality such as a fire, an interrupt signal is output from the terminal and sent to the data processing device via the interrupt line. 1 can be interrupted.
When the data processing device 1 receives the interrupt signal, it changes the order in which the terminals are sequentially called, giving priority to the terminals on the alarm line to which the terminal that issued the interrupt signal is connected, and sequentially calls the terminals. Since the number of terminal devices connected to a pair of alarm wires is, for example, 500 or less, the terminal device that generated the interrupt signal is called within a short time, for example within 5 seconds, and sends out fire information. becomes possible. In other words, abnormalities such as fires are 5
Transmitted within seconds.

FIG. 2 shows a second embodiment of the invention. That is, each of the alarm lines L ₁ to Ln is connected to the data processing device 1 via a separate modem 2 . The data processing device 1 sequentially calls the terminals D ₁ to Dm connected to the alarm line L ₁ and then sequentially calls the alarm lines L ₂ to Ln.
Because you can poll the terminal above,
This has the advantage that the number of bits required for the address of the terminal is smaller than in the first embodiment. In this case, the interrupt lines are provided for each group as appropriate, similar to the embodiment shown in FIG.

FIG. 3 is a block diagram showing a third embodiment of the present invention. In this case, a plurality of terminal devices connected to the alarm line L are divided into a plurality of groups, and a group selection output circuit GSC is provided for each group.
There is an idling period in which the paging signal from the data processing device 1 to each terminal is not transmitted between the paging of one terminal and the paging signal of the next terminal. While a call signal (for example, a signal caused by intermittent pulses) is being sent, the potential of the alarm line L becomes low level in response to the call signal, and the capacitor C, which will be described later, becomes a low potential and cuts off the interrupt signal. is also not output. but,
During the idling period between ringing signals, the alarm line L
becomes high level, and the group selection output circuit
Capacitor C is charged through resistor R built into GSC. When the charging voltage of capacitor C exceeds a certain value, the AND gate AND opens. The other input of the AND gate AND receives interrupt signals from the terminals D ₁ ′ to Dm′ in one group. When the output of the AND gate AND becomes high level, the monostable multivibrator MM becomes high level for a certain period of time, turning on the transistor Q. When transistor Q is turned on, alarm line L is set to low level and an interrupt signal is sent. At this time, the charging voltage of the capacitor C is discharged through the diode D. Therefore, the AND gate AND is closed and the input of the monostable multivibrator MM becomes low level. Therefore, the interrupt signal from the group is sent out after a certain period of time depending on the charging time constant of the capacitor C from the start of the idling period between the ringing signals. An appropriate delay circuit may be used without using a charging/discharging circuit. If a one-shot circuit is used as the delay circuit, accurate delay time can be obtained. In this embodiment, since the delay time is different for each group, the data processing device 1 identifies from which group the interrupt signal was issued based on the time when the interrupt signal was received, and the terminals of the corresponding group Collect information by sequentially calling . In this case, the same effect as described above can be achieved without separately providing an interrupt line. Furthermore, since one alarm line can be divided into a plurality of groups, there is an advantage that the number of terminals connected to one alarm line is not limited. Note that if a code sending circuit is used in place of the monostable vibrator MM, it is also possible to identify groups by making the sending code of the code sending circuit different for each group. In this case, the idling period between paging signals may be short. In this case, the sending code output from the code sending circuit is an interrupt signal. In response to the above-mentioned interrupt signal, the data processing device 1 interrupts the sequential calls up to that point and sequentially calls terminals in the group that issued the interrupt signal preferentially. From the viewpoint of speedy processing, it is desirable to process the sequential paging signals one after another without providing an idling period between the paging signals.

As described above, in the present invention, a large number of terminal devices are divided into a plurality of groups, and when an abnormality is detected in one of the terminal devices, an interrupt signal is output from the group of terminal devices, and the data processing device When a signal is received, the device is configured to give priority to calling the corresponding group of terminals, so it is possible to quickly and centrally monitor abnormalities such as fires and gas leaks without increasing the data transmission speed of the alarm line between the receiver and the terminal. Is possible. That is, it is possible to use a low-quality and inexpensive alarm line, and the terminal and receiver do not require particularly high-speed processing functions, so there is an effect that the entire system can be provided at a low cost.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the invention, FIG. 2 is a block diagram showing a second embodiment of the invention, and FIG. 3 is a block diagram showing a third embodiment of the invention. It is. In the figure, 1...data processing device, 2...modem, L, _L1 to Ln...alarm line, _F1 to Fn...interrupt line, _D1
~Dm, D ₁ '~Dm'...Terminal, C...Capacitor, R
...Resistor, Q...Transistor, D...Diode,
MM...monostable multivibrator, GSC...group selection output circuit.

Claims (1)

[Scope of Claims] 1. A transmission alarm line extending from a receiver is branched into a plurality of alarm lines in the middle, a plurality of terminal devices are connected to each of the plurality of alarm lines, and the plurality of terminal devices are connected to the In the abnormality centralized monitoring method, which monitors abnormalities such as fires and gas leaks by calling sequentially by polling from the receiver and collecting information from each terminal, any of the terminals connected to the same alarm line An interrupt line for sending an interrupt signal to the receiver upon detection of an abnormality in the terminal device is provided corresponding to the alarm line, and upon receiving the interrupt signal, the receiver transmits an interrupt signal to the alarm line corresponding to the interrupt line. An abnormality centralized monitoring system characterized in that the connected terminal devices are configured to be called sequentially with priority. 2. Fire alarms can be detected by connecting multiple terminal devices to a transmission alarm line extending from the receiver, calling the multiple terminal devices sequentially by polling them from the receiver, and collecting information from each terminal device. In the abnormality intensive monitoring method that monitors abnormalities such as gas leaks,
An idling period in which no transmission is performed is provided between the call signal of the terminal device from the receiver and the next call signal of the terminal device, and the plurality of terminal devices are divided into a plurality of groups, and the terminal devices in the same group When an abnormality is detected, an interrupt signal that can identify the group is sent during the idling period, and upon receiving the interrupt signal, the receiver sequentially calls the terminals of the group that sent the interrupt signal with priority. An abnormality centralized monitoring method characterized by the following configuration. 3. The abnormality intensive monitoring system according to claim 2, wherein the interrupt signal for each group is such that the group can be identified from the allocated time transmitted during the idling period.