JPH06119566A - Abnormality informing system - Google Patents

Abstract

PURPOSE:To make it possible to sharply reduce the power consumption of respective abnormality sensors even when many sensors are arranged by entering a detection signal from each sensor after the lapse of a prescribed time during which the sensor is turned to stable operation and then monitoring an abnormal state. CONSTITUTION:A CPU 11 receives signals from respective parts based upon a control program stored in a ROM 12, executes prescribed arithmetic processing by means of a RAM 13 and supplies control signals to respective parts through a bus BUS. A monitoring part switching circuit 14 controlled from the CPU 11 supplies power applied from a power source 16 to n fire monitoring blocks 31 to 3n time-dividedly in each prescribed time and switches fire status information obtained from respective blocks 31 to 3n at prescribed timing. The system is normalized so as to generate an alarm from the receiver side within 5 seconds after detecting a fire. Thereby power supply is time-dividedly executed at an allowable prescribed time interval and fire status information obtained after the lapse of time consumed up to the stable monitoring operation of each fire sensor is received.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality notification system, and more particularly to an abnormality notification system having high power saving efficiency.

[0002]

2. Description of the Related Art A fire alarm system, which is a typical abnormality alarm system, has a line connected to each of a plurality of fire detectors installed in a monitored place (area), and a fire is transmitted through each line. A system is generally used that, when a signal is received, an alarm is displayed on a display section (display window) such as an LED or a lamp on the receiver side connected to the line. This type of fire alarm receiver, in which each sensor line is directly connected, is usually called a P-type receiver, and a sequence circuit is composed of relays, transistors, and the like.

In this type of fire alarm system, the number of lines, that is, the number of receivers increases as the number of monitoring areas increases, and the configuration becomes complicated. Therefore, a system in which at least one receiver is connected to a plurality of lines to which a fire detector is connected via the control of the CPU is disclosed in Japanese Utility Model Laid-Open No. 60-694 and Japanese Patent Laid-Open No. 28795/1990. There is.

[0004]

When a fire detector detects a fire phenomenon (heat, smoke, etc.) at a predetermined level or higher, the detector line (for power supply and signal) is activated to prevent a fire from occurring. To inform. As fire detectors, during normal monitoring, detectors that use mechanical contacts (bimetal, diaphragm, etc.) that do not consume power, photoelectric smoke detectors that operate while constantly receiving power, ion smoke detectors, etc. There is a detector using the electronic circuit (semiconductor), and a fire detector of a type suitable for the environmental conditions of the installation place is adopted. In recent years, in the situation where the number of buildings is increasing, the number of installed sensors becomes enormous, power consumption increases, and the power supply device for that purpose becomes large. This problem is common to systems that notify other abnormalities such as failures as well as fires.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an abnormality notification system capable of significantly saving power.

[0006]

In order to solve the above-mentioned problems, the abnormality notification system according to the present invention provides a predetermined time for each line of a plurality of lines to which at least one abnormality detector is connected. Power is supplied at intervals to put the anomaly detector into a monitoring state, and after a predetermined time for the anomaly detector to become stable, a detection signal from the anomaly detector is taken in to monitor the anomaly state. To be done.

[0007]

According to the present invention, power is supplied from the power supply to the plurality of abnormality monitoring blocks by the monitoring unit switching circuit in a time-divisional manner at predetermined time intervals which are the allowable monitoring time intervals. After that, the abnormality detector receives the abnormal state information at a predetermined timing after a lapse of time until the abnormality detector reaches the stability monitoring operation.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. The present invention is not limited to a fire, but can be applied to a system that notifies other abnormalities such as a failure as described above, but the fire notification system will be described below. FIG. 1 is a block diagram of an embodiment of a fire alarm system to which an abnormality alarm system according to the present invention is applied. The central block 1 is divided into a plurality of (n in this example) monitored locations, and each divided block is a fire monitoring block 31, 32, 33, ..., 3n, and each block is a line l.
The fire display monitoring block 2 which monitors the time-divisionally via 1 to Ln and corresponds the monitoring result to each block.
1, 2, 23, ..., 2n are displayed. Central block 1
Is composed of a CPU 11, a ROM 12, a RAM 13, a monitor switching circuit 14, a display switching circuit 15 and a power supply 16.

The CPU 11 controls the system of the present embodiment as a whole, receives signals from each section based on a control program stored in the ROM 12, and receives the RAM 13 from the RAM 13.
Predetermined arithmetic processing is performed by using, and a control signal is supplied to each unit via the bus BUS.

The monitoring unit switching circuit 14 is based on a control signal from the CPU 11 and is connected to each of the fire monitoring blocks 31, 32 from the power source 16 via the lines L1, L2, L3, ..., Ln.
The power supply to 33, ... 3n is controlled in a time-division manner. The CPU 11 receives the monitoring information from each fire monitoring block sent through the monitoring unit switching circuit 14, and the monitoring result is displayed on the corresponding fire display monitoring block switched and selected by the display unit switching circuit 15.

The fire monitoring blocks 31, 32, 33, ...
3n is configured as shown in FIG. 2, for example. Line L
1, L2, ..., Ln are connected to m fire detectors 41, 4m, 51-5m, 61-6m, respectively, and the line monitoring circuit 3 is connected to each line L1, L2 ,.
, 31n are connected to each other.
A signal indicating the fire status from the fire detector is received by the line monitoring circuit via the line, and when it is determined that the fire condition exists, the fire signal is sent to the CPU 11 via the monitoring unit switching circuit 14, and the display unit It is displayed on the corresponding fire display monitoring block via the control of the switching circuit 15.

In this embodiment, the power supply from the power supply 16 is controlled by the monitoring section switching circuit 14 under the control of the CPU 11.
Thus, by performing the fire monitoring blocks 31 to 3n in a time-division manner at predetermined time intervals and performing fire state information from the fire monitoring blocks at predetermined timing, extremely large power saving can be achieved.

By the way, the fire alarm device is required by the standard to issue an alarm within 5 seconds after the fire detector detects a fire. Further, in a fire detector using an electronic circuit (semiconductor), it generally takes time until the monitoring operation becomes stable after power is supplied. Furthermore, the detection of a fire must occur as soon as possible after the fire has started.

Therefore, in this embodiment, as described above, power is supplied to the fire monitoring blocks 31 to 3n in a time-division manner at predetermined time intervals which are allowable monitoring time intervals, and after power is supplied, The fire detector is configured to receive the fire status information after a lapse of time until the stable monitoring operation is performed.

FIG. 3 shows an example of a timing chart in which the power is supplied from the power supply 16 to each fire monitoring block in a time-divisional manner with the time sequentially shifted by Δt. In the figure,
TA is the power supply time interval to one fire monitoring block,
In other words, it corresponds to the cycle of capturing (receiving) the fire status signal from the fire detector. Further, TB is the total time required from the supply of power to the fire detector to a stable operation and the time required for the CPU 11 to capture the detection monitoring signal from each fire monitoring block. For example, T
If A is set to 4.5 seconds and TB is set to 1 second, the detection signal can be captured by the central block in a short time of several milliseconds, so one fire monitoring block is supplied with power for about 1.1 seconds. It is sufficient to supply the power once every 4.5 seconds for 1.1 seconds, and the power consumption can be greatly saved.

FIG. 4 is a timing chart when the power is supplied to each fire monitoring block while being shifted by the time TB.

In FIG. 5, power supply start timing t0,
A timing chart showing the detection signal acquisition start timing t1 and the power supply cutoff timing t2 is shown.

As described above, in the present embodiment, the power source and each of the fire monitoring blocks are connected at predetermined time intervals by using the monitoring unit switching circuit of the central block 1, and the power is supplied in a time division manner to the line. Activate the connected fire detector,
Observe fire and fault conditions. When the central block 1 detects a fire, the corresponding fire display block is connected to the central block using the display switching circuit 15 and the fire display is performed on the corresponding fire display window. When the fire is restored, the corresponding fire display block is connected to the central block 1 using the display switching circuit 15 and the corresponding fire display window is returned to the non-fire state.

In this embodiment, power is supplied to the fire monitoring block in a time division manner by the control from the central block.
Since the fire detector operates for a short time by the power supplied in a time-division manner, a significant power saving effect can be obtained as compared with the conventional case where the power is constantly supplied to all the fire detectors. Further, by distributing and arranging the fire monitoring blocks at a remote place, it is possible to reduce the number of wires and the physical volume. Furthermore, in this embodiment, inspection and repair can be performed in block units, and therefore, productivity and maintainability are excellent.

[0020]

As described above, according to the abnormality notification system of the present invention, even if a large number of sensors for detecting a fire alarm state such as a fire or a failure are installed, the power consumption of each sensor is reduced. Can be significantly reduced, and the power saving effect is remarkable.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of an abnormality notification system according to the present invention.

FIG. 2 is a block diagram showing a configuration example of a fire monitoring block unit in the embodiment of FIG.

FIG. 3 is a timing chart for explaining one operation example of the embodiment of the present invention.

FIG. 4 is a timing chart for explaining another operation example of the embodiment of the present invention.

FIG. 5 is a diagram showing a timing from power supply to power shutdown in the embodiment of the present invention.

[Explanation of symbols]

 1 Central block 11 CPU 12 ROM 13 RAM 14 Monitoring unit switching circuit 15 Display switching circuit 16 Power supply 21-2n Fire display monitoring block 31-3n Fire monitoring block

Claims (1)

[Claims] Power is supplied to each line of the plurality of lines to which at least one abnormality detector is connected at a predetermined time interval to put the abnormality detector in a monitoring state, and the abnormality detector becomes stable. An abnormality notification system, wherein a detection signal from the abnormality detector is taken in after a predetermined time has elapsed to monitor an abnormal state.