JP6557017B2 - Alarm system - Google Patents

Description

  The present invention relates to an alarm system provided with a light alarm device for notifying a resident of a fire prevention object of the occurrence of a fire by flashing light when a fire alarm of a fire detector is received by a receiver.

  Conventionally, in buildings such as office buildings, store buildings, hospitals, hotels, etc., an automatic fire alarm system has been used as an alarm system for monitoring the fire and notifying people in the building when a fire occurs. Is installed. In such an automatic fire alarm system, it is common to notify the occurrence of a fire by sound such as a buzzer, a bell, and a message. In addition to this sound notification, display notification using an LED, a red lamp, or the like is also performed as appropriate.

  By the way, in recent years, there has also been proposed an alarm system for notifying the occurrence of a fire by blinking high-luminance white light (flash light) having high visibility along with sound (for example, see Patent Documents 1 to 3). . According to such an alarm system, since the occurrence of a fire is notified not only by sound but also by flashing of strong light, for example, a hearing-impaired person can recognize the occurrence of a disaster early and reliably.

  Hereinafter, an alarm that receives a fire signal and notifies the occurrence of a fire by flashing light is referred to as an optical alarm, and the device is therefore referred to as an optical alarm device.

Utility Model Registration No. 3113946 JP 2005-165740 A JP 2011-198194 A

  By the way, in the near future, in addition to conventional acoustic alarms, it is assumed that optical alarm devices that perform optical alarms will be obligatory, and when introducing optical alarms, for example, from the receiver of an automatic fire alarm system for each warning area When an optical alarm line is pulled out and an optical alarm device is connected, and a fire alarm is detected by a receiver and a fire alarm is output, an optical alarm control signal is output from the receiver to the optical alarm line for each predetermined light emission period. Then, it is conceivable to drive the light alarm device to emit light and to notify a light alarm due to blinking of light.

  However, when the light alarm control signal is output from the receiver and the light alarm device is driven to emit light, a plurality of light alarm devices connected to the light alarm line are simultaneously driven to emit light. As the current flowing from the receiver increases, the capacity of the power supply device provided on the receiver side increases, resulting in a boost. Moreover, if the line voltage drops due to a large current that flows when the light alarm devices are driven to emit light all at once due to the impedance of the light alarm line or the like, it may not be possible to emit light of sufficient intensity.

  The present invention provides an alarm system that suppresses an increase in line current when driving to emit light, reduces power supply capacity, and prevents a decrease in line voltage and can reliably perform a light alarm by blinking light. The purpose is to provide.

(Light alarm control function built-in receiver)
The present invention relates to an alarm system in which a fire detector is connected to a sensor line drawn from a receiver, a fire alarm of the fire detector is detected by the receiver, and a fire alarm is output.
When a control signal for controlling the light alarm is received from the reception control unit by supplying a predetermined line power supply voltage to the light alarm line that is provided in the receiver and is drawn out to the warning area in the steady monitoring state, the light alarm line A line voltage control unit that superimposes a predetermined voltage pulse having a predetermined pulse width every predetermined light emission period;
An optical alarm device connected to the optical alarm line, charging the capacitor with the line power supply voltage, and discharging the capacitor with a predetermined voltage pulse to control the light emission unit;
Is provided.

(External light alarm control device)
In another embodiment of the present invention, a fire detector is connected to the sensor line drawn from the receiver, the fire alarm of the fire detector is detected by the receiver, a fire alarm is output, and the fire is transferred. In an alarm system that outputs an information signal,
When a predetermined line power supply voltage is supplied to the optical alarm line that is provided outside the receiver and is drawn out to the alert area in the steady monitoring state, and a control signal for controlling the optical alarm is received from the receiver control unit. A light alarm control device including a line voltage control unit that superimposes a predetermined voltage pulse having a predetermined pulse width on the alarm line every predetermined light emission period;
An optical alarm device connected to the optical alarm line, charging the capacitor with the line power supply voltage, and discharging the capacitor with a predetermined voltage pulse to control the light emission unit;
Is provided.

(High voltage pulse)
The line voltage control unit superimposes a high voltage pulse having a voltage higher than the predetermined line power supply voltage on the predetermined line power supply voltage supplied to the optical alarm line,
The light alarm device includes a circuit unit that charges a capacitor with a predetermined line power supply voltage and drives the light emitting unit to emit light by discharging the capacitor when a high voltage pulse is obtained.

(Low voltage pulse)
The line voltage control unit superimposes a low voltage pulse having a voltage lower than the predetermined line power supply voltage on the predetermined line power supply voltage supplied to the optical alarm line,
The light alarm device includes a circuit unit that charges a capacitor with a predetermined line power supply voltage and drives the light emitting unit to emit light by discharging the capacitor when a low voltage pulse is obtained.

(Polarization pulse)
The line voltage control unit superimposes a polarity voltage pulse obtained by reversing a predetermined line power supply voltage on the optical alarm line,
The light alarm device includes a circuit unit that charges a capacitor with a predetermined line power supply voltage and drives the light emitting unit to emit light by discharging the capacitor when a reversal voltage pulse is obtained.

(Light alarm control to set the line voltage to 0 volts in the normal monitoring state)
The line voltage control unit supplies a line power supply voltage of 0 volts to the optical alarm line in the normal monitoring state, and when a fire alarm is detected by the receiver, a predetermined line other than 0 volts is applied to the optical alarm line. After supplying the power supply voltage, superimpose a high voltage pulse with a voltage higher than the line power supply voltage,
The light alarm device includes a circuit unit that charges a capacitor with a predetermined line power supply voltage and drives the light emitting unit to emit light by discharging the capacitor when a high voltage pulse is obtained.

Further, the line voltage control unit supplies a line power supply voltage of 0 volts to the optical alarm line in the normal monitoring state, and when a fire alarm is detected by the receiver, a predetermined voltage other than 0 volts is applied to the optical alarm line. After supplying the line power supply voltage, superimpose a low voltage pulse with a voltage lower than the line power supply voltage,
The light alarm device includes a circuit unit that charges the capacitor with a predetermined line power supply voltage and drives the light emitting unit to emit light by discharging the capacitor when a low voltage pulse is obtained.

In addition, the line voltage control unit supplies a line power supply voltage of 0 volts to the optical alarm line in a normal monitoring state, and when a fire alarm is detected by the receiver, the line voltage control unit has a voltage other than 0 volts. After supplying the predetermined line power supply voltage, superimpose the reversal voltage pulse that reversed the line power supply voltage,
The light alarm device includes a circuit unit that charges a capacitor with a predetermined line power supply voltage and drives the light emitting unit to emit light by discharging the capacitor when a reversal voltage pulse is obtained.

(Effect when the light alarm control function is built in the receiver)
The present invention relates to an alarm system in which a fire detector is connected to a sensor line drawn from a receiver, the fire alarm of the fire detector is detected by the receiver, and a fire alarm is output. When a control signal for controlling a light alarm is received from the reception control unit by supplying a predetermined line power supply voltage to the light alarm line drawn out to a warning area in a steady monitoring state, a predetermined pulse width is applied to the light alarm line. A line voltage control unit that superimposes a predetermined voltage pulse with a predetermined light emission period, and a light-emitting unit that is connected to the optical alarm line, charges the capacitor with the line power supply voltage, and discharges the capacitor with the predetermined voltage pulse. Since the light alarm device that controls the light emission is provided, the capacitor provided in the light alarm device is charged with the line power supply voltage supplied to the light alarm line in the normal monitoring state or in the idle time of the voltage pulse. The light emitting part that emits light by superimposing a predetermined voltage pulse on the optical alarm line is performed by discharging the charge charged in the capacitor and driving the light emitting part to emit light, and a plurality of lights connected to the optical alarm line. Even if the alarm devices are driven to emit light all at once, the current flowing from the receiver to the optical alarm line does not increase, the peak current that accompanies the light emission drive is suppressed, and the increase in capacity of the power supply device installed on the receiver side is reduced. Allow down.

(Effect when the light alarm control device is externally attached)
In another embodiment of the present invention, a fire sensor is connected to the sensor line drawn from the receiver, and a fire alarm of the fire sensor is detected by the receiver and a fire alarm is output. In an alarm system that outputs a fire alarm signal, a predetermined line power supply voltage is supplied to the optical alarm line that is provided outside the receiver and is drawn out to the alert area in a steady monitoring state, and an optical alarm is output from the receiver. Connected to the light alarm line with the light alarm control device equipped with a line voltage control unit that superimposes a predetermined voltage pulse having a predetermined pulse width on the alarm line every predetermined light emission period when a control signal to be controlled is received In addition, in this case, a steady monitoring state or a voltage pulse is provided because the capacitor is charged by the line power supply voltage and the capacitor is discharged by a predetermined voltage pulse to control the light emission. The capacitor provided in the light alarm device is charged with the line power supply voltage supplied to the light alarm line during the idle time of the light source, and the light emission of the light emitting unit performed by superimposing a predetermined voltage pulse on the light alarm line is charged to the capacitor. Even if multiple light alarm devices connected to the light alarm line are driven to emit light at the same time, the current flowing from the light alarm control device to the light alarm line increases. Without reducing the peak current associated with the light emission drive, the increase in capacity of the power supply device provided on the light alarm control device side is reduced, thereby enabling cost reduction.

  In addition, it is possible to add a light warning system using a receiver that does not have a light warning control function installed in the building. Can be reduced.

(Effects of high voltage pulse)
The line voltage control unit superimposes a high voltage pulse having a voltage higher than the predetermined line power supply voltage on the predetermined line power supply voltage supplied to the optical alarm line. When a high voltage pulse is obtained and a circuit unit that drives the light emitting unit to emit light by discharging a capacitor is provided, by superimposing a high voltage pulse with a predetermined pulse width and period on the optical alarm line, By switching the charging capacitor provided in the light alarm device to discharging, a large discharge current is passed through the light emitting part in a short time to drive light emission, so that light of sufficient intensity is emitted, and this light flashes repeatedly. Thus, it is possible to provide a light alarm to notify the occurrence of a fire.

(Effect of low voltage pulse)
The line voltage control unit superimposes a low voltage pulse having a voltage lower than the predetermined line power supply voltage on a predetermined line power supply voltage supplied to the optical alarm line. And a circuit unit that drives the light emitting unit to emit light by discharging the capacitor when a low voltage pulse is obtained, so that a low voltage pulse with a predetermined pulse width and period is superimposed on the optical alarm line. By switching the charging capacitor provided in the light alarm device to discharge, and driving the light emission by flowing a large discharge current to the light emitting part in a short time, light of sufficient intensity is emitted, and this light is repeatedly emitted. Enables a light alarm that flashes to notify the occurrence of a fire.

  In addition, the low voltage pulse functions as an optical control signal for switching the capacitor being charged to discharge. Even at a low voltage, the discharge current of the capacitor is irrelevant and the discharge current decreases. I don't get up.

  In addition, even if the current consumed by each light alarm device from the light alarm line during light emission control increases and the power supply voltage of the light alarm device decreases, the light emission is controlled by the voltage drop, so the light emission control itself is no problem. Yes.

(Effects of inversion voltage pulse)
The line voltage control unit superimposes a reversal voltage pulse obtained by reversing a predetermined line power supply voltage on the light alarm line, and the light alarm device charges the capacitor with the predetermined line power supply voltage and also turns the reversal voltage pulse. Is provided in the light alarm device by superimposing a reversal voltage pulse with a predetermined pulse width and period on the light alarm line. Switch the capacitor being charged to discharge, and drive it to emit light with a sufficiently large discharge current flowing in the light emitting part in a short time, so that light of sufficient intensity is emitted, and this light flashes repeatedly to fire. Enables an optical alarm to notify the occurrence.

  Also, the reversal voltage pulse functions as an optical control signal for switching the charged capacitor to discharge, and even if the voltage has a reverse polarity, it is irrelevant to the discharge current of the capacitor and the discharge current decreases. Such a problem does not occur.

(Effect of light alarm control that makes the line voltage 0 V in the normal monitoring state)
The line voltage controller supplies a line power supply voltage of 0 volts to the optical alarm line in the normal monitoring state, and when a fire alarm is detected by the receiver, a predetermined line other than 0 volts is applied to the optical alarm line. After supplying the power supply voltage, a high voltage pulse with a voltage higher than the line power supply voltage is superimposed, and the light alarm device charges the capacitor with a predetermined line power supply voltage and discharges the capacitor when a high voltage pulse is obtained. Since the circuit unit for driving the light emitting unit to emit light is provided, in the normal monitoring state, the line voltage of the light alarm line drawn from the line voltage control unit is 0 volts, and the light alarm device 18 in the normal monitoring state is It is possible to prevent malfunction and reduce current consumption.

  In addition, by superimposing a high voltage pulse with a predetermined pulse width and period on the light alarm line, the capacitor being charged in the light alarm device is switched to discharge, and a large discharge current is passed through the light emitting part in a short time to drive light emission. By doing so, it is possible to emit a sufficiently strong light, and by repeating this process, the light is flashed to enable a light alarm to notify the occurrence of a fire.

  This effect is such that when a fire alarm is detected at the receiver, a predetermined line power supply voltage is supplied to the optical alarm line, and then a low voltage pulse or a diversion pulse is superimposed to drive the hand light alarm device to emit light. The same applies to the case.

Block diagram showing an embodiment of a warning system provided with a light warning control function in the receiver Time chart showing system operation of FIG. 1 when high voltage pulse is superimposed on light alarm control A circuit diagram showing an embodiment of an optical alarm device for driving a light emitting unit to emit light by discharging a high voltage pulse after charging a capacitor with a line power supply voltage Time chart showing the system operation of FIG. 1 in which the line voltage is 0 volts in the normal monitoring state Time chart showing the system operation of FIG. 1 when a low voltage pulse is superimposed on the light alarm control A circuit diagram showing an embodiment of an optical alarm device for driving a light emitting unit to emit light by discharging a low voltage pulse after charging a capacitor with a line power supply voltage Time chart showing the system operation of FIG. 1 in the case of superimposing the polarity reversal voltage pulse to an optical alarm control The circuit diagram which showed embodiment of the light alarm device which carries out light emission drive of the light emission part by discharging by a reversal voltage pulse after charging a capacitor with line power supply voltage The block diagram which showed other embodiment of the warning system which externally attached the optical warning control apparatus with respect to the receiver The block diagram which showed the detail of the light alarm control apparatus of FIG.

[Alarm system]
(Alarm system configuration)
FIG. 1 is a block diagram showing an embodiment of a warning system in which a light warning control function is provided in a receiver.

As shown in FIG. 1, the alarm system of the present embodiment is an example of a P-type automatic fire alarm system. From the fire receiver 10, an L line and a C line that also serve as a power supply line toward the alert area. ... 12-n are drawn out, a plurality of fire detectors 14 are connected, and a terminating device (termination resistor) 16 is connected to the end of the line. If it is not necessary to distinguish the sensor lines 12-1 to 12-n, the sensor lines 12 may be simply used.

The fire receiver 10 includes a reception control unit 20. A line reception unit 22, a display unit 24, an operation unit 26, an alarm unit 28, and a transfer unit corresponding to the sensor circuits 12-1 to 12 -n are provided to the reception control unit 20. An information section 30 is provided.

  The reception control unit 20 is a function realized by executing a program, for example, and uses, as hardware, a computer circuit having a CPU, a memory, various input / output ports, and the like.

  The line receiver 22 supplies a predetermined DC voltage, for example, 24 volts DC as a power supply voltage to the fire detector 14 from a power supply built in the fire receiver 10. Here, the power supply voltage supplied from the fire receiver 10 to the detector line 12 is called a line power supply voltage VN, for example, VN = 24 volts is supplied.

  The line receiver 22 detects a line current flowing through the sensor line 12 and outputs a line current detection signal to the reception controller 20. The line current detected by the line receiver 22 includes a report current and a disconnection monitoring current. When a fire is detected by the fire detector 14, the line current detection signal from the line receiver 22 becomes an alarm current that flows through the sensor line 12 by the fire alarm operation, and the reception controller 20 A fire alarm is detected from the line current detection signal.

  In addition, a predetermined line monitoring current determined by the terminating device 16 flows in the sensor line 12 in a normal state (non-reporting state). When the sensor line 12 is disconnected, the line monitoring current does not flow, and the reception control unit 20 Detects that the line current detection signal from the line receiver 22 at this time has dropped below a predetermined value, and determines a disconnection failure.

  The display unit 24 is provided with a fire representative lamp, a district display lamp, and other various display lamps and a liquid crystal display necessary for fire monitoring. The operation unit 26 is provided with various switches necessary for fire monitoring, such as a main sound stop switch, a district sound stop switch, and a transfer stop switch. The alarm unit 28 includes a buzzer and a speaker, and outputs an acoustic alarm and a message alarm. The transfer unit 30 outputs a fire transfer signal to other devices.

(Light alarm control function)
The configuration and function of such an automatic fire alarm system are the same as those of the conventional system, but in addition to this, in the present embodiment, the line voltage controller that functions as a light alarm controller in the fire receiver 10 32 are provided, optical warning lines 15-1 to 15-n are drawn out from the respective warning areas, and a plurality of optical warning devices 18 are connected, and a terminating device (termination resistor) 16 is connected to the end of the line. . If there is no need to distinguish between the optical alarm lines 15-1 to 15-n, the optical alarm line 15 may be simply used.

  When the fire alarm is detected by the fire receiver 10, the light alarm device 18 blinks a light emitting unit using a high-intensity LED, a flashlight, or the like, and performs a light alarm that notifies the occurrence of a fire by the blinking light. . The light alarm by the light alarm device 18 blinks white light or red light having a predetermined light intensity corresponding to the installation location, and the blinking frequency is 0.5 Hz or more and 2 Hz or less (period Tf is 0.5 or more, 2.0). The light emission pulse width Tw does not exceed 0.2 seconds (200 ms), and the plurality of light alarm devices 18 perform synchronous light emission that simultaneously flashes in the same cycle.

  The line voltage control unit 32 functions as a light alarm control device, and supplies the line power supply voltage VN obtained by the power supply device of the receiver 10 to the light alarm line 15 in the normal monitoring state as in the case of the sensor line 12. ing.

  Further, the line voltage control unit 32 receives a control signal for performing an optical alarm when the reception control unit 20 determines a fire alarm, and supplies the optical power to the line power supply voltage VN supplied to the optical alarm line 15. Control is performed to superimpose a predetermined voltage pulse having a predetermined pulse width Tw necessary for blinking of the alarm device 18 for each predetermined light emission period Tf.

  In addition, when the inspection operation of the light alarm device 18 is performed by the operation unit 26 of the fire receiver 10, the reception control unit 20 transmits a control signal for controlling the light alarm to the line voltage control unit 32. The line voltage control unit 32 having received the predetermined power having the predetermined pulse width Tw necessary for the flashing of the light alarm device 18 to the line power supply voltage VN supplied to the light alarm line 15 as in the case of the fire alarm. The voltage pulse is superposed at every predetermined light emission period Tf.

  In the line voltage control unit 32 of the present embodiment, the line power supply voltage VN supplied to the light alarm line 15 is received when the control signal for controlling the light alarm is received from the reception control unit 20 that has determined the fire alarm. A high voltage pulse P1 of higher voltage VH, for example, VH = 30 volts, is superposed on = 24 volts.

  The cycle and pulse width of the high voltage pulse P1 correspond to the cycle and pulse width of the light alarm by the light alarm device 18, and the cycle Tf is, for example, Tf = 2 seconds, and the pulse width Tw is, for example, Tw = 100 milliseconds. .

  The superimposition of the high voltage pulse P1 on the optical alarm line 15 by the line voltage control unit 32 increases the supply of the line power supply voltage VN to the optical alarm line 15 every time an optical alarm control instruction is received from the reception control unit 20 at the cycle Tf. The operation of switching to the supply of the voltage VH for Tw time is performed.

  As another embodiment of the line control unit 32, 0 V may be applied in the normal monitoring state, the line power supply voltage VN may be applied at the time of reporting, and the voltage pulse may be applied every light emission period after the charging time. With this configuration, it is possible to prevent malfunction and reduce current consumption in the normal monitoring state.

  The reception control unit 20 instructs the line voltage control unit 32 of the optical alarm line 15 provided corresponding to the alarmed sensor line 12 to perform the optical alarm control in addition to the alarm operation by detecting the fire alarm. Control to superimpose the pulse on the optical alarm line 15 is performed, and thereby the optical alarm device 18 is driven to blink to notify the optical alarm.

  In this case, in response to an acoustic alarm by the district acoustic device, a high voltage pulse is superimposed on the optical alarm line 15 corresponding to the floor where the fire occurred and directly above the floor, and a light alarm is performed by the light alarm device 18 to expand the subsequent fire. Corresponding to the simultaneous ringing of the entire building, a high voltage pulse is superimposed on all the light warning lines 15 to perform a simultaneous light warning for the light warning device 18 as well.

[Light alarm control by superposition of high voltage pulse]
(Light alarm control operation)
2 is a time chart showing the system operation of FIG. 1 when a high voltage pulse is superimposed on the light alarm control. FIG. 2 (A) shows a fire alarm and FIG. 2 (B) shows the light alarm line. The line voltage is shown, and FIG. 2C shows flashing light emission of the light alarm device connected to the light alarm line.

  As shown in FIG. 2 (A), when a fire is detected by a fire detector 14 connected to a certain sensor line 12 at time t1, a fire is triggered by the fire receiver 10. In addition to the fire alarm by sound detection and display, as shown in FIG. 2 (B), a pulse width Tw, a period Tf, an optical alarm line 15 in a warning area corresponding to the sensor line 12 that has been issued from time t2, A high voltage pulse P1 having a high voltage VH is superimposed.

  Here, the optical alarm device 18 connected to the optical alarm line 15 on which the high voltage pulse P1 is superimposed has completed charging the capacitor by the line power supply voltage VN supplied to the optical alarm line 15 by time t2. When the high voltage pulse P1 is obtained at time t2, the capacitor is switched to discharge, and the light emitting part is driven to emit light by the discharge current of the capacitor over the pulse width Tw of the high voltage pulse P1 to emit pulsed light. As shown in FIG. 2C, by repeating this, a light alarm due to blinking of light is notified.

  FIG. 3 is a circuit diagram showing an embodiment of an optical alarm device for driving a light emitting unit to emit light by discharging a high voltage pulse after charging a capacitor with a line power supply voltage.

  As shown in FIG. 3, first, as a charging circuit for the capacitor 36, the capacitor 36 is connected in series via a resistor 34 between the FC lines serving as an optical alarm line. Further, the discharge circuit of the capacitor 36 has a Zener diode 42 and a resistor 46 connected in series between the resistor 34 on the F line side and the C line, and in parallel therewith, a resistor 48, a light emitting unit 40, and A series circuit of NPN type transistors 38 is connected, and a Zener diode 42 and a resistor 46 are connected to the base of the transistor 38. The Zener diode 42 selects the Zener voltage Vz to turn on when a high voltage pulse is superimposed.

The operation of the light alarm device 18 of FIG. 3 is as follows. In the steady monitoring state in which the line power supply voltage VN (= 24 volts) is supplied between the FC lines, the capacitor 36 is charged via the resistor 34 by the line power supply voltage VN. At this time, the Zener diode 42 is off and the transistor 38 is also off.

  When a high voltage pulse is superimposed between the F-C lines, the Zener diode 42 is turned on, a base current flows through the transistor 38 and is turned on, and the charged capacitor 36 to the positive side of the capacitor, the resistor 48, the light emitting unit 40, A discharge current flows through a path on the negative side of the transistor 38 and the capacitor 36, and the light emitting unit 40 emits pulses. By repeating this, the light emitting unit 40 flashes and emits a light alarm.

  Note that the circuit of FIG. 3 that emits pulses by superimposing the high voltage pulse P1 is an example, and an appropriate circuit having a similar function is applicable.

(Operation of optical alarm control in which the line voltage is 0 volts in the normal monitoring state)
4 is a time chart showing the system operation of FIG. 1 in which the line voltage is 0 volts in the normal monitoring state, FIG. 4 (A) shows the fire alarm, and FIG. 4 (B) is the line of the optical alarm line. FIG. 4C shows flashing light emission of the light alarm device connected to the light alarm line.

  As shown in FIG. 4B, in the normal monitoring state, the line voltage of the optical alarm line 15 drawn out from the line voltage control unit 32 is 0 volts, and thus the malfunction of the optical alarm device 18 in the normal monitoring state is prevented. And current consumption is reduced.

  As shown in FIG. 4 (A), when a fire is detected by a fire detector 14 connected to a certain sensor line 12 at time t1, and a fire is triggered by the fire receiver 10, In addition to the detected fire alarm by sound and display, as shown in FIG. 4B, the line voltage of the light alarm line 15 drawn from the line voltage control unit 32 changes from 0 volts to the line power supply voltage VN. 18 starts power supply.

  For this reason, the light alarm device 18 connected to the light alarm line 15 starts charging the capacitor 36 via the resistor 34 as shown in FIG. 3 by the line power supply voltage VN from time t1, and the capacitor 36 is charged. The line voltage control unit 32 superimposes a high voltage pulse P1 having a pulse width Tw, a period Tf, and a high voltage VH on the optical warning line 15 in the warning area corresponding to the sensor line 12 that has been issued from time t2 after completion. .

  Here, the optical alarm device 18 connected to the optical alarm line 15 on which the high voltage pulse P1 is superimposed completes the charging of the capacitor 36 by the line power supply voltage VN supplied to the optical alarm line 15 by time t2. When the high voltage pulse P1 is obtained at time t2, the capacitor 38 is switched to discharge by turning on the transistor 38, and the light emitting unit 40 is turned on by the discharge current of the capacitor 36 during the pulse width Tw of the high voltage pulse P1. The light emission is driven to emit pulsed light, and as shown in FIG. 4C, this is repeated to notify a light alarm by flashing light.

FIG. 4 shows an example of driving with a high voltage pulse, as shown in FIGS. 5 and 7 to be described later [Light alarm control with superimposed low voltage pulse]
(Light alarm control operation)
FIG. 5 is a time chart showing the system operation of FIG. 1 when a low voltage pulse is superimposed on the light alarm control, FIG. 5 (A) shows a fire alarm, and FIG. 5 (B) shows the light alarm line. The line voltage is shown, and FIG. 5C shows the flashing light emission of the light alarm device connected to the light alarm line.

  As shown in FIG. 5A, when a fire is detected by a fire detector 14 connected to a certain sensor line 12 at time t1, and a fire is triggered by the fire receiver 10, a fire is triggered. In addition to the fire alarm by sound detection and display, as shown in FIG. 5 (B), a pulse width Tw, a cycle Tf, a period Tf, and a light alarm line 15 in a warning area corresponding to the sensor line 12 that has been issued from time t2, as shown in FIG. A low voltage pulse P2 having a low voltage VL is superimposed.

In order to superimpose the low voltage pulse P2 on the sensor line , the line voltage control unit 32 provided in the fire receiver 10 of FIG. 1 sends a control signal for controlling the light alarm over the Tw period with the cycle Tf from the reception control unit 20. Each time reception is performed, the supply of the line power supply voltage VN to the optical alarm line 15 is stopped and an operation of switching to the line voltage, for example, VL = 0 volts is performed. The low voltage VL2 of the low voltage pulse P2 only needs to be lower than the line voltage VL1 that decreases due to the alarm current, and includes values other than 0 volts.

  Here, the optical alarm device 18 connected to the optical alarm line 15 on which the low voltage pulse P1 is superimposed has completed the charging of the capacitor by the line power supply voltage VN supplied to the optical alarm line 15 by time t2. When the low voltage pulse P2 is obtained at time t2, the capacitor is switched to discharge, and the light emitting part is driven to emit light by the discharge current of the capacitor over the pulse width Tw of the low voltage pulse P2 to emit pulsed light. As shown in FIG. 5C, by repeating this, a light alarm by flashing light is notified.

(Light alarm device operated by low voltage pulse)
FIG. 6 is a circuit diagram showing an embodiment of an optical alarm device that drives a light emitting portion to emit light by a low voltage pulse.

  As shown in FIG. 6, first, as a charging circuit for the capacitor 36, a series circuit of a resistor 34 and a capacitor 36 is connected between the FC lines serving as an optical alarm line, and the line voltage VN before the low voltage pulse P2 is superimposed. And the capacitor 36 is charged via the resistor 34.

In the light emission driving circuit using the discharge of the capacitor 36, a series circuit of a PNP transistor 50, a light emitting unit 40 and a resistor 52 is connected in parallel with the capacitor 36, and resistors 56 and 58 and a capacitor 60 are connected to the base side of the transistor 50. Is provided.

  The operation of the light alarm device 18 of FIG. 6 is as follows. The capacitor 36 is charged through the resistor 34 by the line power supply voltage VN applied before the low voltage pulse P2 is superimposed between the FC lines. At this time, due to the voltage drop due to the charging current flowing through the resistor 34, the emitter of the transistor 50 is at a lower potential than the base, and the transistor 50 is off.

  Subsequently, when the low voltage pulse P2 is superimposed, the line voltage drops to, for example, VL = 0 volts, the charging voltage of the capacitor 36 functions as the power supply voltage of the circuit, and passes through the resistor 34 between the emitter and base of the transistor 50. The voltage drop due to the discharge current is added as a bias voltage, the base current flows through the resistor 58, and the transistor 50 is turned on. When the transistor 50 is turned on, a discharge current flows through a path on the plus side of the capacitor 36, the transistor 50, the light emitting unit 40, the resistor 52, and the minus side of the capacitor 36, and the light emitting unit 40 emits pulses. By repeating this, the light emitting unit 40 flashes and emits a light alarm.

  Note that the circuit of FIG. 5 that emits pulses by superimposing the low voltage pulse P2 is an example, and an appropriate circuit having the same function is applicable.

  Also in FIG. 5, as in FIG. 4, the line voltage control unit 32 stops supplying the line power supply voltage to the optical alarm line 15 to 0 V in the normal monitoring state, and the fire receiver 10 fires. When an alarm is detected, a predetermined line power supply voltage may be supplied to the optical alarm line, and then a low voltage pulse or a dipole pulse lower than the line power supply voltage may be superimposed and driven.

[Light alarm control to superimpose inversion voltage pulse]
(Light alarm control operation)
FIG. 7 is a time chart showing the system operation of FIG. 1 when superposing the inversion voltage pulse on the optical alarm control, FIG. 7 (A) shows the alarm current, and FIG. 7 (B) shows the optical alarm line. The line voltage of the light alarm device connected to the light alarm line is shown in FIG. 7C.

  As shown in FIG. 7A, when a fire is detected by a fire detector 14 connected to a certain sensor line 12 at time t1, and a fire is triggered by the fire receiver 10, In addition to the fire alarm by detection and sound and display, as shown in FIG. 7 (B), a pulse width Tw, a period Tf, and an optical alarm line 15 in a warning area corresponding to the sensor line 12 that has been issued from time t2, A polarity voltage pulse P3 having a polarity voltage -VN is superimposed.

  Here, superimposing a polarity voltage pulse on the optical alarm line 15 means inverting the line voltage of the optical alarm line 15 to a predetermined polarity voltage.

  In order to superimpose the inversion voltage pulse P3 on the optical alarm line 15 in this way, the line voltage control unit 32 provided in the fire receiver 10 of FIG. 1 generates an optical alarm from the reception control unit 20 over the Tw period with the period Tf. Each time a control signal to be controlled is received, a switching operation is performed in which the supply of the line power supply voltage VN to the optical alarm line 15 is reversed to switch to the negative polarity reversal voltage −VN.

  Here, the optical alarm device 18 connected to the optical alarm line 15 on which the inversion voltage pulse P3 is superimposed completes charging of the capacitor by the line power supply voltage VN supplied to the optical alarm line 15 by time t2. When the inversion voltage pulse P3 is obtained at time t2, the capacitor is switched to discharge, and the light emitting part is driven to emit light by the discharge current of the capacitor over the pulse width Tw of the inversion voltage pulse P3 to generate pulsed light. Is emitted, and as shown in FIG. 7C, by repeating this, a light alarm by flashing of light is notified.

(Light alarm device that operates by reversal voltage pulse)
FIG. 8 is a circuit diagram showing an embodiment of an optical alarm device in which a capacitor is charged by a line power supply voltage and then discharged by a reversal voltage pulse to drive a light emitting unit to emit light.

  As shown in FIG. 8, first, as a charging circuit for the capacitor 36, a series circuit of a diode 62, a resistor 34 and a capacitor 36 is connected between the FC lines serving as an optical alarm line. Further, as a discharge circuit for the capacitor 36, a series circuit of the resistor 64 and the light emitting unit 40 is connected in parallel with the series circuit of the diode 62 and the resistor 64 so that the current directions are opposite to each other.

  The operation of the light alarm device 18 of FIG. 8 is as follows. The diode 62 is turned on by the line power supply voltage VN applied before the inversion voltage pulse P3 is superimposed between the FC lines serving as the optical alarm line 15, and the capacitor 36 is charged via the resistor 34. .

Subsequently, when the reversal voltage pulse P3 is superimposed, the C line side becomes positive and the F line side becomes negative, so that the diode 62 is turned off and charging of the capacitor 36 is stopped, while the reversal voltage -VN and the capacitor are stopped. The light emitting unit 40 is forward-biased by the charging voltage of 36 and becomes conductive, and is discharged from the positive side of the capacitor 36 to the light emitting unit 40 through a path from the resistor 64, the light emitting unit 40, the F-C line, and the negative side of the capacitor 36. When current flows, the light emitting unit 40 emits pulses, and by repeating this, the light emitting unit 40 blinks and emits a light alarm.

  Note that the circuit of FIG. 7 that emits pulses by superimposing the inversion voltage pulse P3 is an example, and an appropriate circuit having the same function is applicable.

  Also in FIG. 7, as in FIG. 4, the line voltage control unit 32 stops supplying the line power supply voltage to the optical alarm line to 0 volts in the normal monitoring state, and the fire receiver 10 generates a fire. When a report is detected, a predetermined line power supply voltage may be supplied to the optical alarm line, and then a dipole pulse may be superimposed and driven.

[Alarm system with external light alarm controller]
FIG. 9 is a block diagram showing another embodiment of a warning system in which an optical warning control device is provided outside the receiver.

As shown in FIG. 9, the alarm system of the present embodiment is an example of a P-type automatic fire alarm system, and a plurality of fire detectors are connected to the detector lines 12-1 to 12-n drawn from the fire receiver 10. 14 is connected, and a terminating device (termination resistor) 16 is connected to the end of the line. The fire receiver 10 includes a reception control unit 20. A line reception unit 22, a display unit 24, an operation unit 26, an alarm unit 28, and a transfer unit corresponding to the sensor circuits 12-1 to 12 -n are provided to the reception control unit 20. An information section 30 is provided.

  This point is the same as the alarm system of FIG. 1 except that the light alarm control function is not incorporated in the fire receiver 10 and the alarm lines 12-1 to 12-n are drawn outside the fire receiver 10. A plurality of light warning control devices 100 are provided corresponding to the areas, and light warning lines 15-1 to 15-n are drawn out from the respective warning areas to connect a plurality of light warning devices 18, and a line terminating device is a terminating device. (Terminating resistor) 16 is connected.

  The light alarm control device 100 is connected to a signal transmission signal line from the signal transmission unit 30 provided in the fire receiver 10 so that a control signal for controlling the light alarm can be input. Further, from the transfer unit 30, a transfer signal line is individually connected corresponding to the sensor lines 12-1 to 12-n to enable optical alarm control in units of line notification.

  Moreover, the transfer part 30 of this embodiment performs a light alarm based on the instruction | indication of the reception control part 20, when a fire alert is detected or when inspection operation of the light alarm apparatus 18 is performed by the operation part 26. A control signal to be controlled is output.

  The light alarm control device 100 is supplied with a line power supply voltage VN and a higher high voltage VH from a dedicated power supply device (not shown) through two power supply lines and a common line. The line power supply voltage VN and the high voltage VH may be supplied from the power supply unit of the fire receiver 10. Further, an AC or DC power supply (not shown) may be supplied to the light alarm control apparatus 100, and the line power supply voltage VN and the high voltage VH may be generated from the power supply in the light alarm control apparatus 100.

  FIG. 10 is a block diagram showing details of the light alarm control device of FIG. As shown in FIG. 10, the light warning control device 100 includes a light warning control unit 102 and a line voltage control unit 104.

  When the light alarm control unit 102 receives a control signal for controlling the light alarm from the transfer unit 30 of the fire receiver 10 based on the detection of the fire alarm, the light alarm control unit 102 outputs a light alarm control signal having a predetermined pulse width Tw. Control to output to the line voltage control unit 104 is performed for each light emission period Tf. The pulse width Tw of the light alarm control signal is, for example, Tw = 100 milliseconds, and the period Tf is, for example, Tf = 2 seconds.

  In addition, when the light alarm device 18 is inspected by the operation unit 26 of the fire receiver 10, a control signal for controlling the light alarm is transmitted from the transfer unit 30. As in the case of the fire alarm, the unit 102 performs control to output an optical alarm control signal having a predetermined pulse width Tw necessary for the inspection of the optical alarm to the line voltage control unit 104 every predetermined light emission period Tf.

  The line voltage control unit 104 performs control to superimpose the high voltage pulse P1 on the FC line serving as the light warning line 15 based on the light warning control signal from the light warning control unit 102 and connects to the sensor line 12. The light alarm device 18 is made to perform a light alarm.

  As another embodiment of the line voltage control unit 104, a low voltage pulse P2 having a low voltage VL is superimposed on the FC line serving as the light alarm line 15 based on a light alarm control signal from the alarm control unit 102. Control may be performed, or control for superimposing the inversion voltage pulse P3 having the inversion voltage −VN may be performed.

  The operation of the light warning control by the light warning control device 100 provided in the warning system of FIG. 9 is the same as that shown in FIG. 2 or FIG. 4 when the high voltage pulse P1 is superimposed on the F-C line. When superimposing the low voltage pulse P2 on the line, it is the same as shown in FIG. 5, and when superposing the inversion voltage pulse P3 on the FC line, it is the same as shown in FIG. The configuration of the light alarm device 18 that emits flashing light is the same as that shown in FIGS. 3, 6, and 8.

[Modification of the present invention]
In the above embodiment, a P-type fire receiver that monitors a fire in units of sensor lines is taken as an example. However, an R-type that monitors a fire in units of addresses by connecting a fire detector with an address set to a transmission line. It may be a fire receiver.

  The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Fire receivers 12-1 to 12-n: Sensor line 14: Fire detectors 15-1 to 15-n: Light alarm line 16: Termination device 18: Light alarm device 20: Reception control unit 22: Line reception Unit 24: display unit 26: operation unit 28: alarm unit 30: transfer unit 32, 104: line voltage control unit 36: capacitor 40: light emitting unit 100: light alarm control device 102: light alarm control unit

Claims (4)

In an alarm system for connecting a fire detector to a sensor line drawn from a receiver, detecting a fire alarm of the fire detector by the receiver and outputting a fire alarm,
When the control signal for controlling the light alarm is received from the reception control unit by supplying a predetermined line power supply voltage to the light alarm line provided in the receiver and drawn to the warning area in the steady monitoring state, the light alarm A line voltage control unit that superimposes a predetermined voltage pulse having a predetermined pulse width on the line every predetermined light emission period;
An optical alarm device connected to the optical alarm line, charging a capacitor with the line power supply voltage and discharging the capacitor with the predetermined voltage pulse to control light emission of the light emitting unit;
With
The line voltage control unit superimposes a reversal voltage pulse obtained by reversing the predetermined line power supply voltage on the optical alarm line,
The light alarm device includes a circuit unit that charges a capacitor with the predetermined line power supply voltage and drives the light emitting unit to emit light by discharging the capacitor when the inversion voltage pulse is obtained. And alarm system.
In an alarm system in which a fire detector is connected to a sensor line drawn from a receiver, a fire alarm of the fire detector is detected by the receiver, a fire alarm is output and a fire alarm signal is output. And
When the control signal for controlling the optical alarm is received from the receiver by supplying a predetermined line power supply voltage to the optical alarm line that is provided outside the receiver and is drawn out to the warning area in a steady monitoring state, An optical alarm control device including a line voltage control unit that superimposes a predetermined voltage pulse having a predetermined pulse width on the alarm line every predetermined light emission period;
An optical alarm device connected to the optical alarm line, charging a capacitor with the line power supply voltage and discharging the capacitor with the predetermined voltage pulse to control light emission of the light emitting unit;
With
The line voltage control unit superimposes a reversal voltage pulse obtained by reversing the predetermined line power supply voltage on the optical alarm line,
The light alarm device includes a circuit unit that charges a capacitor with the predetermined line power supply voltage and drives the light emitting unit to emit light by discharging the capacitor when the inversion voltage pulse is obtained. And alarm system.
In an alarm system for connecting a fire detector to a sensor line drawn from a receiver, detecting a fire alarm of the fire detector by the receiver and outputting a fire alarm,
When the control signal for controlling the light alarm is received from the reception control unit by supplying a predetermined line power supply voltage to the light alarm line provided in the receiver and drawn to the warning area in the steady monitoring state, the light alarm A line voltage control unit that superimposes a predetermined voltage pulse having a predetermined pulse width on the line every predetermined light emission period;
An optical alarm device connected to the optical alarm line, charging a capacitor with the line power supply voltage and discharging the capacitor with the predetermined voltage pulse to control light emission of the light emitting unit;
With
The line voltage control unit supplies a line power supply voltage of 0 volt to the optical alarm line in a normal monitoring state, and when a fire alarm is detected by the receiver, the line voltage control unit is other than 0 volt to the optical alarm line. After supplying a predetermined line power supply voltage, superimposing a reversal voltage pulse obtained by reversing the line power supply voltage,
The light alarm device includes a circuit unit that charges a capacitor with the predetermined line power supply voltage and drives the light emitting unit to emit light by discharging the capacitor when the inversion voltage pulse is obtained. And alarm system.
In an alarm system in which a fire detector is connected to a sensor line drawn from a receiver, a fire alarm of the fire detector is detected by the receiver, a fire alarm is output and a fire alarm signal is output. And
When the control signal for controlling the optical alarm is received from the receiver by supplying a predetermined line power supply voltage to the optical alarm line that is provided outside the receiver and is drawn out to the warning area in a steady monitoring state, An optical alarm control device including a line voltage control unit that superimposes a predetermined voltage pulse having a predetermined pulse width on the alarm line every predetermined light emission period;
An optical alarm device connected to the optical alarm line, charging a capacitor with the line power supply voltage and discharging the capacitor with the predetermined voltage pulse to control light emission of the light emitting unit;
With
The line voltage control unit supplies a line power supply voltage of 0 volt to the optical alarm line in a normal monitoring state, and when a fire alarm is detected by the receiver, the line voltage control unit is other than 0 volt to the optical alarm line. After supplying a predetermined line power supply voltage, superimposing a reversal voltage pulse obtained by reversing the line power supply voltage,
The light alarm device includes a circuit unit that charges a capacitor with the predetermined line power supply voltage and drives the light emitting unit to emit light by discharging the capacitor when the inversion voltage pulse is obtained. And alarm system.

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