JPH04333198A - Equipment for noticing fire - Google Patents

Abstract

PURPOSE:To facilitate the processing of a free line in the installation of a fire noticing equipment, etc., by usage-registering that the specified line is used at the time of receiving a fire signal from the specified line. CONSTITUTION:A fire receiver RE is connected with plural sensors SE and terminal resistances T with the line L1 and the line L3,... are similarly connected with the plural sensors SE and the terminal resistances T. In this case, the line L2 is the free line and the free line L2 is connected with nothing. When the fire signal is received from the usage line L1 and L3 using the fire sensors SE, the lines L1 and L3 receiving the fire signal are registered that they are under usage, the usage-registered lines L1 and L3 display disconnection when a disconnection detecting means detects disconnection and the line L2 which is not executed usage-register (the free line) is controlled not to display disconnection.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fire alarm equipment that automatically processes idle lines.

0002

2. Description of the Related Art In conventional fire alarm equipment, if an idle line occurs during installation, a terminating resistor is connected to the idle line in order to prevent a disconnection warning from occurring.

[0003] In other words, when an idle line occurs, since no fire detector or the like is connected to the idle line, the impedance when looking at the idle line from the receiver becomes very high. The detection circuit determines that there is a disconnection and issues a disconnection warning. In order to prevent unnecessary disconnection warnings from occurring for idle lines, a terminating resistor is connected to the idle line side terminal of the receiver. The impedance of this terminating resistor is not as low as the impedance when the fire detector detects a fire, nor is it high enough to generate a disconnection warning.

0004

However, if a terminating resistor is always connected to an idle line as described above, there is a problem in that the work of connecting the terminating resistor is complicated. Furthermore, when a terminator other than a terminating resistor, such as a capacitor, is used, the same problem as above occurs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fire alarm system in which idle lines can be easily handled when the fire alarm system is installed.

[0006]

SUMMARY OF THE INVENTION According to the present invention, when a fire signal is received from a predetermined line, the predetermined line is registered as being in use. Further, the present invention is configured to cause a disconnection to be displayed when the disconnection detecting means detects a disconnection for a line that is registered for use, and not to display a disconnection for a line that is not registered for use. It is something to do.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the present invention.

In this embodiment, the fire receiver RE is connected to a plurality of detectors SE and a terminating resistor T via a line L1, and the lines L3, . . . are also connected to a plurality of A sensor SE and a terminating resistor T are connected. However, the line L2 is an idle line, and nothing is connected to the idle line L2.

In the above embodiment, when a fire signal is received from the lines L1 and L3 that use the fire detector, the line that received the fire signal is registered as being in use. For lines that are registered for use, when the disconnection detection means detects a disconnection, a disconnection is displayed, and the line that is not registered for use (vacant line) L is displayed.
Regarding No. 2, control is performed so as not to display a disconnection.

The fire receiver RE includes an MPU (microprocessor) 1, ROMs 2, 3, and 4, a RAM 5, and a display section DP.
, an operation section OP, and interfaces 6 and 7.

The ROM2 is an area for storing programs shown in flowcharts in FIGS. 2, 3, and 4.
3 is a storage area for storing various constants, and ROM 4 stores the usage status of the lines L1, L2, L3, etc. (memorizes whether the line is in use or an idle line) EE
It is P-ROM.

That is, the ROM 4 is an example of a use registration means that registers the use of a predetermined line as being in use when a fire signal is received from the predetermined line. Furthermore, the MPU 1 and the ROM 2 are an example of a disconnection detection means that detects whether or not a line is disconnected, and for a line that is registered for use, a disconnection display is displayed when the disconnection detection means detects a disconnection. This is an example of a control means that controls so that a disconnection display is not displayed for a line that has not been registered for use.

Further, the RAM 5 is a work area, and the display section DP includes a CRT, an indicator light, and the like.

[0014] In connection with the line L1, there are provided a receiving circuit R1, this interface 11, a fire test circuit FT1 for generating a fire signal on the line L1, and this interface 11a. Regarding line L2, receiving circuit R2
, this interface 12, a fire test circuit FT2 that generates a fire signal on line L2, and this interface 1.
2a, and also for line L3, receiving circuit R3
, this interface 13, a fire test circuit FT3 that generates a fire signal on line L3, and this interface 1.
3a is provided. Other lines are also provided similar to those described above.

The smoke prevention equipment control circuit 21 controls the smoke prevention equipment MD such as a smoke prevention smoke damper, and is connected to its interface 21a. The smoke prevention equipment control circuit 22 controls the smoke prevention equipment MD such as the smoke prevention smoke damper, and is connected to the interface 22a, and the smoke prevention equipment control circuit 23 controls the smoke prevention equipment MD such as the smoke prevention smoke damper. Smoke exhaust equipment M
D, and is connected to its interface 23a.

Next, the operation of the above embodiment will be explained.

FIG. 2 is a flowchart showing the overall operation in the above embodiment. In this flowchart, when initial settings are performed (S10), a fire monitoring program is executed (S20), a disconnection monitoring program is executed (S30), and if the recovery switch is on (S40).
) and performs a recovery operation (S41). The operations of S20 to S41 are repeated.

FIG. 3 is a flowchart showing a specific example of the fire monitoring program (S20) in the above embodiment.

First, the fire alarm equipment of the above embodiment is installed in a structure such as a building, and among the lines L1, . . . , the line L2 is
Assume that only one line is free and the other lines are used lines (lines to which fire detectors are connected), and while the above fire monitoring program was running, lines L1,... were connected. Sequentially add smoke to the fire detector SE,...
An operation test of the sensors SE, . . . is performed by heating them with a heater.

[0020] Here, the function n indicating the number of lines is "1".
is set (S21), and the state of the first line L1 is read (S22). At this time, the fire detector SE connected to the line L1 is activated by the smoke or heating test and outputs a fire signal, so it receives the fire signal from the line L1, and this fire signal is transmitted to the receiving circuit R1 and the interface. 11
is sent to MPU1 via line L1, and this MPU1
The fact that a fire signal has been received is stored in the RAM 5. Therefore, it is determined that a fire signal is "present" for the line L1 (S23), and fire alarm processing such as ringing of the main sound, district sound, and fire display in the fire warning district is performed (S24).

[0021] Then, whether or not the line L1 is being used is read from the ROM 4 (S25). When the fire alarm equipment has just been installed, no line is registered for use in ROM4, so line L1 is determined to be "vacant" (S26), and the use registration for line L1 is performed in ROM4. (S27). Note that if the determination in S26 is made again after the line L1 has been registered for use, the process for the next line is performed without registering for use again.

That is, only when a fire signal is detected from a certain line and the use of that line has not been registered, the use of the line is registered in the ROM 4. Also, if a certain line is idle, the fire detector SE
Since it is not connected, a fire signal is not received from that idle line, and therefore no registration is made for use of that idle line.

[0023] Then, the above processing (S22 to S27) is performed as follows.
Repeat until the last line (Nth line) (S28,
S29), the next disconnection monitoring program (S30) is started. Note that in the above embodiment, since only line L2 is an idle line, all lines other than line L2 are registered for use.

[0024] Furthermore, when the fire detector SE is connected to the unused line L2, the fire detector SE operates during a fire test or in the event of a fire and outputs a fire signal (S23). The use is automatically registered in response to a fire signal (S27).

[0025] According to the above embodiment, the receiver RE can reliably recognize that the line is in use without connecting a terminator to the idle line, and therefore, when installing fire alarm equipment, etc. Easy to process.

FIG. 4 is a flowchart showing a specific example of the disconnection monitoring program (S30) in the above embodiment.

[0027] Here, the function n indicating the number of lines is "1".
is set (S31), and whether or not the first line L1 is being used is read from the ROM 4 (S32). Since line L1 is in use (S33), the status of line L1 is read (S34), and if it is disconnected (S3
5) The disconnection indicator light in the display section DP is turned on to display the disconnection area (S36). Then, the above processing (S32 to S36) is performed for the next line L2 (S37, S38).

Since the second line L2 is an empty line (
S32, S33), the above-mentioned processing (S32 to S36) for the next line is performed without determining whether or not there is a disconnection.

That is, in the above embodiment, even if a terminating resistor or the like is not connected to an idle line when installing fire alarm equipment, etc., a warning or display indicating that the idle line is disconnected is issued afterwards. There is no need to connect a terminating resistor, etc. to an empty line.

By the way, in the above embodiment, the case where smoke and heat are applied to the fire detector SE to cause a fire signal has been explained as an example, but the MPU 1 is connected to the fire test circuit F.
Give commands to T1, FT2, FT3, and receive circuits R1, R
2. A fire test can be conducted by bringing R3 into the same state as the fire state. In this way, even if the MPU 1 issues a fire signal by giving a command to the fire test circuits FT1, FT2, and FT3, it is possible that the idle line will be registered for use, and in this case,
Thereafter, a disconnection message will be displayed for that idle line. However, MPU1 is fire test circuit FT1
, FT2, and FT3 to generate a fire signal, the MPU 1 itself can predict that a fire signal will be generated for that line, so in that case, processing is performed so that the line is not registered for use.

Note that in the above embodiment, the rewritable R
Although the case where EEP-ROM is used as OM4 has been described, EP-ROM may be used instead of EEP-ROM. In this case, an ultraviolet irradiation device for erasing the stored contents of the EP-ROM may be provided to erase the stored contents before changing them. Also, R
RAM may be used instead of OM4.

Further, in the above embodiment, the case where a terminating resistor is used as a terminator has been described, but the same applies to the case where a terminator other than a terminating resistor, such as a capacitor, is used.

[0033]

According to the present invention, since there is no need to connect a terminator to an idle line, it is possible to easily process an idle line when installing fire alarm equipment, etc.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing the overall operation in the above embodiment.

[Figure 3] Fire monitoring program (S2
0) is a flowchart showing a specific example.

[Figure 4] Disconnection monitoring program (S3
0) is a flowchart showing a specific example.

[Explanation of symbols]

RE...Fire receiver, SE...Fire detector, MD...Smoke exhaust damper, 1...MPU, 2, 3, 4...ROM.

Claims (2)

[Claims] 1. A fire alarm system comprising: use registration means for registering use of a predetermined line as being in use when a fire signal is received from the predetermined line. 2. Disconnection detection means for detecting whether or not a line is disconnected; use registration means for registering use of the predetermined line as being in use when a fire signal is received from the predetermined line; Control means for controlling the line that is registered for use to display a disconnection when the disconnection detecting means detects a disconnection, and for the line that is not registered for use, not to display a disconnection display. and;
A fire alarm system characterized by having: