JP2852989B2 - Anomaly notification system - Google Patents

Description

Description: 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. 2. Description of the Related Art As a fire alarm system which is a typical system of an alarm system, a line is connected to each of a plurality of fire detectors installed in a monitored place (area), and each line is connected. 2. Description of the Related Art A system that generally displays an alarm on a display unit (display window) such as an LED or a lamp of a receiver connected to a line when a fire signal is received via the line is generally used. This type of fire alarm receiver, in which each detector line is directly connected, is usually called a P-type receiver and constitutes a sequence circuit with relays, transistors and the like. [0003] As the number of monitored areas increases, the number of lines, that is, the number of receivers of this type of fire alarm system 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 through the control of a CPU is disclosed in Japanese Utility Model Laid-Open No. 60-694 and Japanese Patent Laid-Open No. 2-28795. I have. [0004] When a fire detector detects a fire phenomenon (heat, smoke, etc.) of a predetermined level or higher, the fire detector turns on a detector line (for both power supply and signal). It signals the occurrence of a fire. Fire detectors use mechanical contacts (bimetals, diaphragms, etc.) that consume no power during normal monitoring, and photoelectric smoke detectors and ion smoke detectors that operate while constantly receiving power supply. There is a sensor using an electronic circuit (semiconductor), and a fire detector of a type suitable for the environmental conditions of the installation location is adopted. In recent years, in a situation in which the building is becoming higher and higher, the number of installed sensors becomes enormous, the power consumption increases, and a problem arises in that the power supply device becomes large. This problem is not limited to a fire but is common to systems for notifying other abnormalities such as a failure. Accordingly, an object of the present invention is to provide an abnormality notification system that enables significant power saving. In order to solve the above-mentioned problems, an abnormality notification system according to the present invention is provided with a control unit and a power supply in a central block, and at least one of a plurality of abnormality monitoring blocks is provided. An abnormality display monitoring block that is connected to the central block via a line and displays an abnormal state is provided corresponding to each of the plurality of abnormality monitoring blocks, and the control unit controls the power supply to the line. The plurality of abnormality monitoring blocks are sequentially supplied to the plurality of abnormality monitoring blocks in a time-division manner, and the abnormality sensors in the abnormality monitoring blocks are sequentially monitored in a time-division manner. The abnormality information from the abnormality sensor is taken in through the line, and the abnormality information from the abnormality monitoring block is displayed on the corresponding abnormality display monitoring block. Abnormality notification system characterized by performing. According to the present invention, the power supply from the power supply is performed in a time-division manner by the monitoring unit switching circuit for a plurality of abnormality monitoring blocks at predetermined time intervals, which is an allowable monitoring time interval. After the supply, the abnormal state information is received at a predetermined timing after a lapse of time until the abnormality sensor reaches the stability monitoring operation. Next, an embodiment of the present invention will be described with reference to the drawings. The present invention can be applied not only to a fire but also to a system for notifying other abnormalities such as a failure as described above. The fire alarm 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 blocks for each of a plurality of (n in this example) monitored locations, and the divided blocks are fire monitoring blocks 31, 32, 33,..., 3n, and each block is a line l.
1 to Ln, and monitors the monitoring result in a time-division manner, and monitors the monitoring result for each block.
, 2, 23,..., 2n. 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 entire system of the present embodiment, receives signals from various units based on a control program stored in the ROM 12, and receives signals from the RAM 13.
To perform a predetermined arithmetic processing, and supply a control signal to each unit via the bus BUS. [0010] The monitoring unit switching circuit 14 controls the fire monitoring blocks 31, 32, and 32 from the power supply 16 via the lines L 1, L 2, L 3,..., Ln based on a control signal from the CPU 11.
, 3n are controlled in a time-sharing manner. The CPU 11 receives the monitoring information from each fire monitoring block transmitted via the monitoring unit switching circuit 14, and displays the monitoring result on the corresponding fire display monitoring block that is switched and selected by the display unit switching circuit 15. The fire monitoring blocks 31, 32, 33,...
3n is configured, for example, as shown in FIG. Line L
1, L2,..., Ln are connected to, for example, m fire detectors 41,..., 4m, 51 to 5m, 61 to 6m, respectively.
, 31n are connected to each other.
A signal indicating a fire condition from the fire detector is received by a line monitoring circuit via a line, and when it is determined that a fire is occurring, a 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 through the control of the switching circuit 15. In this embodiment, the power supply from the power supply 16 is controlled by the monitoring unit switching circuit 14 controlled by the CPU 11.
Thus, the fire monitoring blocks 31 to 3n are time-divisionally performed at predetermined time intervals and the fire status information from the fire monitoring blocks is performed at a predetermined timing, thereby achieving extremely large power saving. By the way, the fire alarm device is required by a standard to issue an alarm on the receiver side within 5 seconds after the fire detector detects a fire. In general, a fire detector using an electronic circuit (semiconductor) requires time from when power is supplied to when the monitoring operation is stabilized. In addition, fire detection must be performed as soon as possible after a fire occurs. Therefore, in the present embodiment, as described above, the power supply to the fire monitoring blocks 31 to 3n is performed in a time-division manner at a predetermined time interval which is an allowable monitoring time interval. It is configured to receive the fire state information after a lapse of time until the fire detector reaches the stability monitoring operation. FIG. 3 shows an example of a timing chart in which power is supplied from the power supply 16 to each fire monitoring block in a time-division manner by sequentially shifting the time by Δt. In the figure,
TA is the power supply time interval to one fire monitoring block,
In other words, this corresponds to a period for receiving (receiving) a fire state signal from the fire detector. Further, TB is the total time of the time required from the supply of power to the fire detector to the 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. It is sufficient to supply the power once every 4.5 seconds for 1.1 seconds, and the power consumption can be greatly reduced. FIG. 4 is a timing chart when power is supplied to each fire monitoring block while being shifted by a time TB. FIG. 5 shows a power supply start timing t0,
A timing chart showing detection signal capture start timing t1 and power cutoff timing t2 is shown. As described above, in this embodiment, the power supply and each of the fire monitoring blocks are connected at predetermined time intervals using the monitoring unit switching circuit of the central block 1 to supply power in a time-division manner, and Activate the connected fire detector,
Observe fires and failures. 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 a fire is displayed on the corresponding fire display window. When the fire is recovered, 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 the present embodiment, power is supplied to the fire monitoring block in a time sharing manner under the control of the central block.
Since the fire detector is operated for a short time by the power supplied in a time-sharing manner, a remarkable power saving effect can be obtained as compared with the conventional case where power is constantly supplied to all the fire detectors. Further, by distributing and arranging the fire monitoring blocks at remote locations, the number of wires and the physical volume can be reduced. Furthermore, in the present embodiment, inspection and repair can be performed in block units, so that productivity and maintainability are excellent. As described above, according to the abnormality notification system according to 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, each of the sensors can be used. Power consumption can be greatly reduced, and the power saving effect is remarkable.

BRIEF DESCRIPTION OF THE 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 an 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 timing from power supply to power cutoff in the embodiment of the present invention. [Description of Signs] 1 Central block 11 CPU 12 ROM 13 RAM 14 Monitor switching circuit 15 Display switching circuit 16 Power supply 21 to 2n Fire display monitoring blocks 31 to 3n Fire monitoring block

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G08B 17/00 G08B 23/00-26/00

Claims (1)

(57) [Claims] A control unit and a power supply are provided in a central block, and each of a plurality of abnormality monitoring blocks is connected to the central block via at least one line to display an abnormal state. A monitoring block is provided corresponding to each of the plurality of abnormality monitoring blocks. Under the control of the control unit, the power supply is sequentially supplied to the plurality of abnormality monitoring blocks in a time-sharing manner via the line to monitor the abnormality. The abnormality sensors in the block are sequentially monitored in a time-division manner, and after a predetermined period of time in which the abnormality sensors become stable, the abnormality information from the abnormality sensors is taken in via the line, and the abnormality monitoring is performed. An abnormality notification system, wherein abnormality information from a block is displayed on the corresponding abnormality display monitoring block.