JP3073793B2 - Fire alarm system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm system in which a receiving unit of a fire alarm system checks the receiving unit itself, and when a predetermined failure is found by the inspection, a fire indicating a failure is displayed. Notification equipment.

[0002]

2. Description of the Related Art FIG. 4 is a flowchart showing the operation of a conventional receiver in a fire alarm system.

First, initialization is performed (S30), and the fire test switch for testing whether the function of the receiver is normal is off (S31), and if the fire recovery switch is not operated (S32), the fire is started. Monitoring is performed (S33). At this time, if a fire signal has not been generated (S34), the process returns to S31. If a fire signal has been generated (S34), the fire area is displayed and the main bell and the area bell are sounded. Thus, a fire notification is made (S35), and the above operation is repeated.

If the fire recovery switch is operated during the above operation (S32), the power supply to the detector is turned off (S36), the district indicator light is turned off, and the main bell and the district bell are stopped (S36). S37). Then, when a predetermined recovery time has elapsed (S38), the power supply to the sensor is turned on (S39), and the process returns to S31.

[0005] In this manner, fire monitoring is performed at all times, a fire alarm is issued when a fire has occurred, and if a fire recovery operation is performed thereafter, the power supply to the fire detector is turned off for a predetermined time.

[0006]

In the above conventional example, when the test switch is turned on (S31), the receiver of the fire alarm system performs a test process for checking the receiver itself (S40). That is, by automatically or by operating the line selection switch, a pseudo fire signal is input to the receiving circuit of each line, and it is checked whether the circuit components of each line, the district light, the main bell, etc. operate normally, When a failure is found, a failure display indicating that a failure exists is performed.

However, this inspection is normally performed only at the time of a regular inspection twice a year. If there is a failure at that time, the display is made. If the recovery switch is turned on at this time, the failure display is erased. Is done. As a result, the failure is not displayed until the next periodic inspection is performed, so that there is a problem that the presence of the failure is not noticed. Another problem is that even if a new fault that affects the fire notification occurs in the receiver, it will not be noticed until a periodic inspection is performed.

An object of the present invention is to provide a receiving unit of a fire alarm system capable of performing an automatic inspection by a receiving unit when a recovery switch is turned on and displaying a failure when there is a failure. Is what you do.

[0009]

According to the present invention, each time the fire recovery operation is performed, the receiver itself is inspected, and when a predetermined failure is found in the inspection, a failure is displayed.

[0010]

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

In this embodiment, a plurality of detectors SE and a terminating resistor T are connected to a fire receiver RE via a line L1.
Are connected to the lines L2, L3,... Similarly to the line L1.

In the above embodiment, every time a fire recovery operation is performed,
The receiver itself performs an inspection, and when a predetermined failure is found in the inspection, a failure is displayed.

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

The ROM 2 is an area for storing programs shown in the flowcharts of FIGS.
This is a storage area for storing various constants.

The RAM 5 is a work area, the operation unit OP is a unit having a recovery switch and the like, the display unit DP has a CRT, an indicator lamp, and the like, and the fire receiver RE checks its own inspection. As a result, when a predetermined failure was discovered,
This is an example of a means for displaying the failure. Also, MPU
1 and the ROM 2 are examples of means for checking the receiving unit RE itself each time a fire recovery operation is performed, and causing the display unit DP to display a failure when a predetermined failure is found in the inspection. .

In connection with the line L1, there are provided a receiving circuit R1, this interface 11, a fire test circuit FT1 for outputting a fire signal to the line L1, and this interface 11a. For the line L2, the receiving circuit R2
An interface 12; a fire test circuit FT2 for outputting a fire signal to the line L2;
2a, and the receiving circuit R3
An interface 13; a fire test circuit FT3 for generating a fire signal on line L3;
3a. For other lines, the same circuits as described above are provided.

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

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

FIG. 2 is a flowchart showing the operation of the above embodiment.

First , initialization is performed (S1). If the fire recovery switch is not turned on (S2), fire monitoring is performed (S3). If no fire signal is generated at this time (S4), the process goes to S2. Return, if a fire signal is generated (S
4) A fire zone is displayed, and a fire alarm is made by ringing the main bell and the zone bell (S5), and the process returns to S2.

If the fire recovery switch is turned on during the above operation (S2), the power supply to the detector SE is turned off (S6), the district indicator light is turned off, and the main bell and the district bell are turned off. It stops (S7). Then, a test process, which is a feature of the present invention, is performed (S10). After a predetermined recovery time has elapsed (S21), a power supply switch to the sensor SE is turned on (S22), and the fire recovery operation ends. Return to S2 .
The test process (S10) is a process in which the fire receiver RE performs a test by itself for each line, and is performed every time the fire recovery switch is turned on. Therefore, even if the recovery switch is pressed after the fire receiver RE discovers a predetermined failure, the failure state can always be displayed as long as the failure exists.

FIG. 3 shows the test processing (S
10 is a flowchart illustrating an example of an operation.

When performing the test process (S10), first, a variable n indicating a line is initialized to "1" (S11), and a test resistor is connected to the first line L1 (S12). That is,
Switching is performed so that a predetermined test resistor is connected to the first line L1 input terminal of the receiver RE, and a dummy fire signal is received by the first line L1 input terminal.
If only 1 has a fire signal (S13, S14), the first line L1 is normal and the variable n indicating the number of lines is set to 1.
The value is incremented (S16), and the process returns to S12 to repeat the above operation.

When the n-th line is being tested, a fire signal is received at the input terminal of a line other than the n-th line (S13), or the n-th line receives a fire signal. If not (S14), an "inspection abnormality" indicating that an abnormality was detected during the inspection is displayed (S17). That is, the error number is displayed on the number display section of the display section DP.
As the error number, for example, "E5" is used if an abnormality has occurred in the fifth line. In addition,
When an abnormal line is not displayed, a manual test or an automatic test switch may be turned on in order to know which line the abnormal line is. At this time, the display stops at the abnormal line. As described above, when the variable n indicating the number of lines reaches the maximum set number of lines (S15), the inspection is terminated because all the lines are normal (S18). In this case, no failure display is performed. Then, the process returns to S21 shown in FIG.

In the above-described embodiment, the presence of a failure is detected as a failure of the fire receiver RE in accordance with the presence or absence of a fire signal. In addition, other failures such as disconnection are detected. At times, a failure may be detected.

It should be noted that another receiving unit such as a repeater may be used instead of using the receiving unit RE of the fire alarm system. In this case, the receiving unit such as the repeater receives a restoration command from the receiver. Each time the repeater itself is inspected, and when a predetermined failure is found in the inspection, a failure signal is sent to the receiver for display.

[0027]

According to the present invention, each time the recovery switch is turned on, an automatic inspection is performed by the receiving unit, and when a failure is detected, the failure can be displayed. Therefore, when the fire is restored and the normal monitoring state is restored, it is possible to know whether or not the function of the receiver is in a normal state.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the operation of the embodiment.

FIG. 3 shows a test process (S1) in the above flowchart.
It is a flowchart which shows an example operation | movement of (0).

FIG. 4 is a flowchart illustrating an example of an operation of a conventional receiving unit in the fire alarm system.

[Explanation of symbols]

 RE: fire receiver, SE: sensor, DP: display unit, OP: operation unit, 1: MPU, 2, 3, ROM.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G08B 17/00 G08B 29/14

Claims (3)

(57) [Claims] The receiving unit of the fire alarm system performs a check of the receiving unit itself, and when a predetermined fault is found by the check, a fault display indicating that a fault exists is provided. Each time a fire recovery operation is performed, the receiving unit itself is inspected, and when a predetermined failure is found in the inspection, a failure indication is displayed. 2. The method according to claim 1, Set the maximum number of lines where fire detectors are installed to N lines
And the line to be tested is stored as the n-th line.
Storage means; When testing the n-th line, a fire occurs on lines other than the n-th line
When there is no signal and there is a fire signal on the nth line,
A test to set the line to be tested to the (n + 1) th line
Line setting means; When the nth line to be tested becomes the Nth line,
Test termination means for terminating the test; A fire alarm system characterized by the provision of a fire alarm. 3. The method according to claim 2, When performing a test on the n-th line, a line other than the n-th line
First judge who judges whether a fire signal has been received or not
Steps; Determine whether a fire signal is received on the nth line
Second determining means; Is established, The above-mentioned predetermined failure is caused by a fire signal on a line other than the n-th line.
Or that there is no fire signal on the nth line.
A fire alarm system characterized by the fact that: