JPH0624954Y2 - Fire alarm line designation device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a line designating device for a fire alarm, which selects a line for a sensor test or the like by operating a shift key.

The line selection for the detector test in the conventional fire alarm is made by selecting the test line by the switching operation of the rotary switch provided in the receiver, but when the number of lines increases However, a large number of rotary switches must be used, and the test circuit provided in the receiver is complicated and costly.

In order to solve this problem, a device for selecting a line by designating a line number with a numeric keypad has been considered, but at least 12 push button switches are required to configure the numeric keypad, and the line number designated with the numeric keypad is also required. In order to confirm the above, a numerical indicator provided separately from the fire area indicator lamp was necessary, which was a cost problem.

The present invention has been made in view of such conventional problems, and simplifies the line designation operation, and separates the line display for confirming the designated line by using the fire area display unit. It is therefore an object of the present invention to provide a line designating device for a fire alarm which is economical and excellent in operability, since it is not necessary to provide a numerical display device.

In order to achieve this object, the present invention is provided with a control key for designating a control item such as a test and two shift keys for increasing or decreasing the line number, and the line selection number is sequentially increased or decreased each time the shift key is operated. Then, the line is selected, and the display of the selected line can be confirmed by turning on or blinking the fire area indicator light corresponding to each line provided in the fire receiver.

Embodiments of the present invention will be described below with reference to the drawings.

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

First, the configuration will be described. 1 is a receiver of a fire alarm, and a plurality of sensor lines L1 to Ln and a common line Lc are drawn out from the receiver 1, and sensor lines L1 to Ln and a common line Lc are drawn. A plurality of fire detectors 2 are connected between the two. The fire detector 2 is configured to send a test response current to the common line Lc based on the fire test signal from the receiver 1. For example, the sensor line L1 and the common line Lc are connected to each other through the emitter and collector sides of the transistor, and the fire test signal is input to the base side of the transistor so that when the fire test signal is input, the common to the sensor line L1. The lines Lc are configured to be short-circuited.

The receiver 1 is provided with a central processing unit (hereinafter referred to as CPU) 3 for performing fire reception processing by program control, fire test by line selection, equipment control, and recovery control, and a control program is fixed to the CPU 3. Based on the line selection signal given from the CPU 3 via the output port 7 and the ROM 4 temporarily stored therein and the RAM 5 for temporarily storing the fire detection data etc. are connected, and the sensor lines L1 to Ln are connected to the line selection circuit 6. Performs line selection operation. The line selection in the line selection circuit 6 is performed by scanning the sensor lines L1 to Ln sequentially in a constant cycle in a normal fire monitoring state. When, the sensor line corresponding to the designated line number will be selected.

Further, on the common line Lc side, there is provided a detection resistor R that generates a voltage according to the alarm current flowing through the line when the fire detector 2 issues an alarm, and the voltage generated by this resistor R is used as the current detection circuit 8 And the CPU 3 is made to input it as a fire detection signal through the input port 9. Further, the CPU 3 has, through the output port 10 and the indicator light drive circuits 11a to 11n, the number of district indicator lights 12 corresponding to the sensor lines L1 to Ln.
a to 12n are connected, and the CPU 3 displays a fire occurrence area by controlling blinking of the corresponding area indicator lamp when a fire is detected.
Further, the district indicator lamps 12a to 12n are adapted to light the district indicator lamp corresponding to the selected line number under the control of the CPU 3 when a line is selected for a sensor test or the like which will be clarified later. I have to.

Next, as an operation procedure for performing a line selection operation such as a sensor test, a right shift key 13 for increasing the line number and a left shift key 1 for decreasing the line number.
4, a fire test key 15 and a device control key 16 are provided as switches for designating control items by line selection.
And a recovery key 17 are provided, and the outputs of the right shift key 13, the left shift key 14 and the control key group are subjected to waveform shaping or the like by the operation signal output circuits 18a to 18e, and are output via the input port 19. It is given to the CPU 3.

As the line selection control according to the key operation of the right shift key 13 or the left shift key 14 in the CPU 3, the line selection number N is changed to N = N + 1 every time the right shift key 13 is operated.
On the other hand, each time the left shift key 14 is operated, the line selection number N is sequentially decreased to N = N-1, and the line selection number obtained by operating the shift key is output via the output port 7 to the line selection circuit. By assigning it to 6, the sensor line corresponding to the line number is selectively connected.

Further, for the key operation of the control key group consisting of the fire test key 15, the device control key 16 and the recovery key 17, a fire test, device control or recovery processing program corresponding to the operation of each key is selected, A signal for performing a fire test on the sensor line selected by operating the right shift key 13 or the left shift key 14 or operating the terminal control device, and further performing a fire test or restoring the terminal control device is transmitted to the sensor line.

Further, when the right shift key 13 or the left shift key 14 is continuously pressed, the CPU 3 performs arithmetic processing for continuously increasing or decreasing the line number N, and the right shift key 1
The selected line can be continuously switched by holding down the 3 or left shift key 14.

Furthermore, in response to the line selection based on the right shift key 13 and the left shift key 14, the CPU 3 causes the district indicator lamps 12a ...
The district indicator light corresponding to the line number N of 12n is turned on so that the line selected by the shift operation can be confirmed.

Next, the operation of the embodiment shown in FIG. 1 will be described with reference to the flowcharts shown in FIGS.

First, in the steady monitoring state in which no fire test or the like is performed, the sensor lines L1 to Ln are scanned by the line selection circuit 6, and the current flowing in the selected line is detected by the current detection circuit 8 to be detected by the CPU 3. Input and fire alarm when the detected current exceeds a predetermined threshold,
Flash the corresponding district indicator. On the other hand, a case will be described in which a line is selected and any one of the control key groups is operated for fire test, equipment control, and the like.

FIG. 2 is a flow chart showing the line selection control. First, when the power of the receiver 1 is turned on, the line number N is initialized to N = 0 in block A, and then the right shift key 13 is operated in decision block B. Determine the presence or absence. If the right shift key 13 is pressed to test the sensor line L1 in this state, the process proceeds to block C, the line number N is increased to N = N + 1, and the selection of the sensor line L1 is designated.
District indicator light 12 corresponding to the sensor line L1 based on 1
Illuminate a to allow confirmation of the selected sensor line.

Hereinafter, every time the right shift key 13 is operated, the line number N is sequentially
Is increased and the district indicator light corresponding to the selected line is turned on.

On the other hand, when the left shift key 14 is operated, the operation of the left shift key 14 is determined in the determination block D, and in the block E, the line number N is decremented by 1, N = N-1,
By selecting the line based on the line number obtained in this block E, the district indicator lamp corresponding to the line number is turned on.

When the right shift key 13 is further pressed, the processes of blocks B and C in the flowchart of FIG. 3 are repeated, and the line number N is sequentially increased at regular intervals,
Continuous line selection can be performed. Of course, even when the left shift key 14 is continuously pressed, the processes shown in blocks D and E are repeated, and similarly, the line number N can be continuously decreased.

When the right shift key 13 or the left shift key 14 is continuously pressed, the operation signals of the respective keys are continuously input to the CPU 3. By using this operation signal as a gate signal and counting clock pulses with a counter, The line number can be sequentially increased or decreased. Also,
In order to prevent line selection due to erroneous operation of the shift key, it is desirable for the operation signal output circuits 18a to 18e to output the operation signal to the input port 19 when the key output signal continues for a certain time.

Next, FIG. 3 is a flow chart showing the discrimination of the control key group for the fire test control, etc. The control item is discriminated in the discrimination block a by the operation of the control key after the above-mentioned line selection, and the fire test If you go to block b, send a fire test signal to the detector line, and if it is equipment control, block c
Then, the control signal is sent to the sensor line, and if it is restored, the process goes to block d to send the restoration signal to the sensor line.
Thereby, the line is selected and controlled.

In the above embodiment, the district indicator lamps 12a ...
12n is blinked and the district indicators 12a to 12n are turned on when a line is selected by a fire test or the like. However, it is of course possible to turn on the light when a fire is detected and blink it when a line is selected. . Further, the indicator light may be a digital display.

Next, the effect of the present invention will be described. Since only two shift keys have to be provided as operation switches used for line selection for fire test, etc., the operation circuit unit can be extremely simplified and selected. As the area indicator lamp for displaying the fire area, which is provided in advance in the fire receiver as the display means for confirming the line, is turned on or blinks, the number display is the same as when using the conventional numeric keypad. It is possible to obtain high reliability and economical efficiency by simplifying the device configuration without requiring the. In addition, since line selection can be performed with two shift keys, the line selection operation at the time of a fire test becomes extremely easy, and the line number is increased or decreased each time the shift key is operated. The selection operation is extremely easy to perform in a one-to-one correspondence, and if the number of lines is large and you want to select a specific sensor line, hold down the shift key to continuously increase the line number. Alternatively, since the reduction is performed, it is possible to shift to a desired sensor line selection state in a short time.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG.
FIG. 3 is a flow chart showing a line selection operation according to the present invention. 1: Receiver 2: Fire detector 3: CPU 4: ROM 5: RAM 6: Line selection circuit 7, 10: Output port 11a-11n: Indicator light drive circuit 12a-12n: District indicator light 13: Right shift key 14: Left shift key 15: Fire test key 16: Equipment control key 17: Recovery key 18a-18n: Operation signal output circuit L1-Ln: Sensor line Lc: Common line

Claims (1)

[Scope of utility model registration request] 1. A fire alarm line designation device for connecting a fire detector to each of a plurality of detector lines drawn from a receiver and designating a line selection number to perform a detector test, etc. A control key for designating a control item, two shift keys for increasing or decreasing the line selection number, and a line selection control means for sequentially increasing or decreasing the line selection number for each operation of the two shift keys to select a line. A line designating device for a fire alarm, comprising display control means for controlling lighting or blinking of a fire area display section of a receiver corresponding to a selected line number.