JPH084369B2 - Fire alarm device standby power supply test device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fire alarm device, and more particularly to a battery test of a standby power supply.

[Prior Art] Conventionally, a power supply device of a fire alarm device is usually supplied with a commercial power supply, and when a power failure occurs, power is supplied with a spare battery so that monitoring can be performed for a predetermined time or longer. The spare battery is normally charged and prepared for an emergency. In addition, a load is periodically connected to the spare battery, and it is determined that the battery voltage is equal to or lower than a specified value during discharging for a predetermined time, and the defective battery is determined. The load connected to the battery is designed to assume the time when the circuit current becomes the maximum when a fire is triggered. Since the circuit current during normal monitoring is small, the load connects the alarm circuit and a test resistor.

[Problems to be Solved by the Invention] Generally, in the spare battery test of the fire alarm device, when the test is started, this state is maintained for a predetermined time, so if there is a fire alarm during the test or an actual power failure occurs, The current supplied may always be at or above a certain maximum current consumption. In particular, when a fire alarm is issued, the alarm indicator or the like is driven, so it is possible that the specified maximum current consumption will be exceeded. Therefore, there is a drawback that the voltage is reduced due to overload and the monitoring state can be maintained for a shorter time than usual.

[Means for Solving Problems] A standby power supply test device for a fire alarm device according to the present invention is used for a fire alarm device that performs fire monitoring based on detection signals from a plurality of fire detectors, and is used for a standby power supply. Connect the battery to the alarm circuit of the fire alarm device and the load resistance, and then supply it to the above-mentioned fire alarm device in the standby power supply test device of the fire alarm device that determines whether the battery is normal or abnormal from the voltage value within a predetermined time. Output is stopped when the power supply voltage is abnormal,
A means for generating a test signal that is output for a predetermined time from the time when the battery test switch is operated, and a power source for the fire alarm device when the commercial power source fails and when the test signal is output. A means for switching from the commercial power supply to the standby power supply and supplying the commercial power supply normally,
Further, it is characterized by comprising means for connecting the load resistor in parallel to the alarm circuit when the test signal is being output, and means for inhibiting the output of the test signal at the time of a fire alarm.

[Embodiment] An embodiment of a standby power supply test device for a fire alarm device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a block circuit diagram showing an embodiment of a power supply device of a fire alarm device of the present invention. This power supply device 1
A switching regulator 10 for obtaining a predetermined DC power supply from a commercial power supply (AC100V, etc.) supplied to terminals A and B, a battery E as a backup power supply, a transformer TR, and a diode bridge D.
A relay RA that has a charging circuit for the battery E consisting of B and a resistor R6, and a switching contact ra1 that switches during a power failure or battery test.
And a relay R with a normally open contact rb1 that is energized during battery testing
Control circuit of relay RA consisting of B, resistors R1 and R2, transistor Q1, resistors R3 and R4, transistor Q2, knot circuit NOT
And a resistor R5 connected as a load during a battery test, and a voltage detection circuit 11 that detects an abnormality in the power supply output voltage. A control signal for the battery test, that is, a test signal is applied to the terminal T, and the terminal S
The detection signal of the voltage detection circuit 11 is output to the terminals, and the terminals D and C are power supply output terminals.

The operation of the power supply device 1 configured as described above will be described. Normally, a low level signal is applied to the terminal T.
Therefore, relay RA is energized and relay RB is deenergized. At this time, the switching contact ra1 is connected to the switching regulator 10 side. The spare battery E is charged by the charging circuit. When a power failure occurs at such a time, power supply to the relay RA is cut off, so that the switching contact ra1 is connected to the battery E side and power is supplied from the spare battery E.

When performing a battery test, a high level signal is applied to the terminal T. Relay RA is de-energized and relay RB is energized.
The switching contact ra1 is switched to the battery E side, the normally open contact ra1 is closed, and the battery E is connected to the load resistor R5. The battery E is also supplied with power from an external alarm circuit. The current consumption of the alarm circuit during constant monitoring is generally lower than during fire alarms. Then, this small amount is consumed by the resistor R5, the alarm circuit is operated for a certain period of time, and the drop in the power supply voltage during this period is detected by the voltage detection circuit 11 to judge whether the battery E is good or defective. If a power failure occurs during this battery test, the relay RB is deenergized and the normally open contact rb1 is opened to stop the power supply to the load resistor R5 to eliminate unnecessary power consumption.

Next, one embodiment of a fire alarm device using the power supply device shown in FIG. 1 will be described based on the block circuit diagram shown in FIG.

This fire alarm device includes a receiver 2, a pair of lines L and CO extending from the receiver 2, and a fire detector 2 connected between the pair of lines L and CO. Receiver 2
A power supply device 1, a relay RF connected between the terminal D of the power supply device 1 and the line L, and having two normally open contacts rf1 and rf2,
It includes a resistor R7 connected to the normally-open contact rf1, a switch SW for starting a test, a mono-multivibrator MM triggered by the closing of the switch SW, and an AND circuit AND.

The operation of the device configured as described above will be described. Normally, the output of the mono multivibrator MM is at low level. Therefore, the output of the AND circuit AND is at low level. When the switch SW for starting the battery test is operated to close it, the mono multivibrator MM is triggered. The output of the mono multivibrator MM outputs a high-level test signal for a predetermined time (10 minutes). AND circuit AND
Since one of the inputs is normally high level, the output also outputs a high level signal for a certain period of time. This high-level test signal is applied to the terminal T of the power supply device 1 to start the test of the spare battery. If a fire breaks out during this battery test,
The fire detector 3 detects this and operates, and a pair of lines L, CO
Conduct between. Power is supplied to the relay RF and is energized. It is self-held by the normally open contact rf2, and one input of the AND circuit AND is set to low level by closing the normally open contact rf1. In addition, a fire alarm is displayed based on a contact not shown. The output of the AND circuit AND goes low and the battery test is stopped. Even during the battery test, the fire detector 3
If there is an operation signal from, the test is stopped.

Next, an embodiment of the fire alarm device when the power supply device shown in FIG. 1 is used and a microprocessor is used for signal processing will be described based on the block diagram shown in FIG.

This fire alarm device includes a receiver 2, a transmission line 4 extending from the receiver 2, and a plurality of fire detectors 3 connected to the transmission line 4. The receiver 2 is a power source. Device 1 and central processing unit 20 such as a microprocessor
And a storage device 21, an interface 22 for controlling the power supply device 1, and a transmission unit that transmits and receives signals to and from each fire detector 3.
25, an interface 23 for the transmission unit 25, an operation unit 26 including various operation switches, a display unit 27 for displaying a fire alarm and a failure, and an interface 24 for the operation unit 26 and the display unit 27. Has been done. Each fire detector 3 is equipped with a transmission means.

The operation of the fire alarm device thus configured will be described. The central processing unit 20 executes the processing program stored in the storage device 21. When the power is turned on, the central processing unit 20 sets the voltage of the signal line connected to the terminal T of the power supply device 1 via the interface 22 to the low level. Then, normally, the central processing unit 20 activates the transmission unit 25 via the interface 23 to sequentially call the respective sensors 3 to request return data and collect the return data. From this return data, we are monitoring whether a fire has occurred. Central processing unit
When 20 determines that a fire has occurred, it drives the display unit 27 via the interface 24 to display the situation and location of the fire and display a fire alarm. When there is an operation input from the operation unit 26 to test the spare battery of the power supply device 1 during normal monitoring, the central processing unit 20 sets the terminal T of the power supply device 1 to a high level via the interface 22. The power supply device 1 starts the battery test. Then, the central processing unit 20 determines that the battery is defective if a voltage abnormality signal is output to the terminal S of the power supply device 1 within a predetermined time after the battery test is started. When there is no signal, it is displayed on the display unit 27 that the battery is normal, and the battery test ends. When it is determined that a fire has occurred during the battery test, the central processing unit 20 sets the terminal T of the power supply device 1 to the low level via the interface 22 and stops the battery test.

Next, an example of the processing program executed by the central processing unit 20 will be described with reference to the flowchart shown in FIG.

First, when the power is turned on, an initialization routine is performed in step S01. In step S02, the variable n indicating the address of the fire detector is set to 1. In step S03, the fire detector n is called and the return data is fetched. In step S04, it is determined whether the returned data is fire data. If YES, the process proceeds to step S06, and if NO, the process proceeds to step S05. In step S06, it is determined whether the battery test is in progress. If YES, the process proceeds to step S07, and if NO, the process proceeds to step S08. In step S07, the battery test is stopped. Step S08 is a routine for displaying a fire alarm. In step S05, it is determined whether there is a battery test operation input, and Y
If ES, proceed to step S10, and if NO, proceed to step S09. In step S10, it is determined whether a fire alarm is being issued, and if YES, step S09.
If NO, the process proceeds to step S11. A step S11 starts a battery test. In step S09, it is determined whether the battery test is in progress, and YES
If so, proceed to step S14, and if NO, proceed to step S12. In step S14, it is determined whether the battery voltage is abnormal, and if YES, step S17
If NO, the process proceeds to step S15. In step S17, it is displayed that the battery is abnormal (defective), and the battery test ends. In step S15, it is determined whether a predetermined time has elapsed from the start of the test, and Y
If ES, proceed to step S16, and if NO, proceed to step S12. In step S16, it is displayed that the battery is normal, and the battery test ends. Step S12 advances the variable n by one step. In step S13, it is determined whether the variable n exceeds the final address N, and YES
If so, the process returns to step S02, and the same process is performed from the fire detector having the first address. If NO, the process returns to step S03 and the same process is performed from the fire detector having the next address.

[Effects of the Invention] As described above, the standby power supply test apparatus of the present invention stops the battery test when a fire alarm or a power failure occurs during the battery test, and the battery test cannot be performed during a fire or during a power failure. As a result, it is possible to prevent the spare battery from being over-discharged and the power supply voltage from decreasing, so that the spare battery and the alarm circuit are not adversely affected.

[Brief description of drawings]

FIG. 1 is a block circuit diagram showing an embodiment of a power supply device for a fire alarm device according to the present invention, and FIG. 2 is a block circuit diagram showing an embodiment of a fire alarm device using the standby power supply test device according to the present invention. FIG. 3 is a block circuit diagram showing another embodiment of the fire alarm device of the present invention, and FIG. 4 is a flow chart showing an example of a processing program executed by the central processing unit shown in FIG. 1 ... Power supply device, 2 ... Receiver, 3 ... Fire detector, 4
...... Transmission line, 10 …… Switching regulator, 11…
… Voltage detection circuit, 20 …… Central processing unit, 21 …… Storage device, 22,23,24 …… Interface, 25 …… Transmission section, 26
…… Operation part, 27 …… Display part, TR …… Transformer, DB …… Diode bridge, RA, RB, RF …… Relay, Q1, Q2 …… Transistor, R1 to R7 …… Resistance, E …… Battery, NOT …… NOT circuit, AND …… AND circuit, MM …… mono multivibrator, SW …… switch, A, B, C, D, T, S …… terminals, L, C
O ... railway.

Claims (1)

[Claims] 1. A fire alarm device for monitoring fires based on detection signals from a plurality of fire detectors, wherein a battery for a standby power source is connected to a warning circuit of the fire alarm device and a load resistor for a predetermined period. In the standby power supply test device of the fire alarm device that judges the normality or abnormality of the battery from the voltage value within the time, when the power supply voltage supplied to the above fire alarm device becomes abnormal, the output is stopped and the battery test Means for generating a test signal that is output for a predetermined time after the switch is operated, and when the commercial power supply is stopped or when the test signal is output, the fire alarm device is powered from the commercial power supply. A means for switching and supplying to the standby power supply, a means for connecting the load resistor in parallel to the alarm circuit when the commercial power supply is normally supplied and the test signal is output, and a fire alarm. A standby power supply test device for a fire alarm device, comprising: means for prohibiting output of the test signal.