JP6516485B2 - Light alarm device - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a light alarm device of an automatic fire alarm system that issues an alarm with intermittent flash light when a fire occurs.

  Conventionally, an automatic fire alarm system is provided with an acoustic device emitting a predetermined volume at a predetermined interval to warn of the occurrence of a fire, to notify of the occurrence of a fire and to urge evacuation.

  However, when there is a hearing impairment in the person to be evacuated at the time of an emergency such as a fire, it is desired to popularize an alarm device that works on senses other than hearing such as light to notify the emergency. There is also known a light alarm device that emits flash light intermittently by using an electronic flash represented by a strobe (registered trademark) that emits an intense flash, an LED lamp with a large amount of light, etc. as a light source. (Refer patent documents 1-4).

Japanese Patent Application Laid-Open No. 8-161679 JP, 2011-198194, A

The conventional light alarm device turns off the light normally, and when an abnormal condition such as a fire occurs, the flash light is intermittently emitted to notify an alarm (Japanese Patent Application Laid-Open No. 2000-101118, etc.). In addition, in the case of fire, it is necessary to generate a strong light that can be seen through smoke (Reference: Report of the Fire Research Institute of 1970 "On visibility in smoke (I)""On the distance", etc., a series of research papers by God Tadahisa). Therefore, as a light emitting element, an electronic flash represented by a strobe (registered trademark) that emits an intense flash, an LED lamp with a large amount of light, or the like is used.
Since the light alarm device is required to operate reliably at the time of an alarm, it is necessary to test and maintain the light emitting element for abnormality, and conventionally, a worker performs flash light emitting an alarm to notify the operator. The operation was confirmed visually. Furthermore, it is necessary to be informed in advance that the flash light for the test is misidentified as an alarm and does not cause confusion, but in view of the fact that the light alarm device is an alarm device mainly intended for the hearing impaired. An announcement by the in-house broadcast can not be completed. For this reason, the test was complicated.
Patent Document 2 discloses a technique of notifying a user of deterioration of a light emitting element by performing flash light emission notifying an alarm and detecting the number of times of light emission of the light emitting element and discharge at the time of light emission. Although this technique does not require an operator for visual confirmation, the flash emission for the test may be mistaken as an alarm and may cause confusion. That is, the test of the light alarm device should not be confusing, with the emission of light that may be mistaken for an alarm. And it is desirable to conduct a test for maintaining and operating the reliable operation of the light alarm device at normal times, constantly or frequently and regularly and automatically. As a method of conducting such a test, it is conceivable to detect an abnormality such as disconnection by flowing a weak current not causing light emission to the light emitting element. However, since a light emitting element such as a xenon tube emits light due to discharge, it is difficult to conduct a test to detect an abnormality such as disconnection by supplying a weak current. In order to solve the above-mentioned problems, the present invention regularly and automatically does not falsely recognize an alarm as a normal even if it is a light alarm device using a light emitting element which can not be tested by passing a weak current. It is an object to test a light emitting element.

  (1) The present invention comprises a light emitting element, a light emission driving means for driving the light emitting element, and a control means for controlling the light emission driving means, and receives an alarm signal indicating an emergency such as a fire. A light alarm device in which a control means controls the light emission drive means to flash an alarm by intermittently emitting light from the light emitting element, and a discharge detection means for detecting a discharge in the light emitting element; The control means performs test light emission to periodically cause the light emitting element to emit light in a time shorter than the time of light emission when controlling the light emission drive means to notify an alarm, and the discharge detection means is the light emitting element The light alarm device determines that the light emitting element is normal by detecting the discharge of

  (2) Further, the invention provides the light alarm according to the above (1), further including an illuminance sensor, wherein the control means performs the test light emission when the illuminance sensor detects the brightness more than a predetermined value. It is an apparatus.

  (3) Further, the present invention includes a light emitting element, a light emission driving means for driving the light emitting element, and a control means for controlling the light emission driving means, and receives an alarm signal indicating an emergency such as a fire. In the light alarm device in which the control means controls the light emission drive means to flash the light emitting element intermittently to notify an alarm, discharge detection means for detecting discharge in the light emitting element; Whether the notification area is unmanned based on the detection result of the surrounding condition detection means for detecting the surrounding condition in order to determine whether the notification area notifying the alarm is unmanned or not Unmanned determination means for determining whether the light emitting element is normal or when the unmanned determination means determines that the unmanned person is unmanned, the control means controls the light emission drive means to emit light from the light emitting element Let Perform test emission by the discharge detecting means detects the discharge in the light emitting element, the light emitting element is determined to be normal, an optical warning device.

  (4) Further, according to the present invention, in (3), the surrounding state detecting means determines that the unmanned judging means is unmanned when the illuminance of the notification area is equal to or less than a predetermined value. An illuminance sensor for detecting the illuminance of the notification area; a human sensor for detecting the presence of a person in the notification area in order to determine that the unmanned person judging means is unmanned when the presence of a person is not detected in the notification area; And / or a light alarm device.

  (5) Further, according to the present invention, in any one of the above (1) to (4), the discharge detection means is a discharge noise associated with the light emission of the light emitting element at the time of the test light emission, or the light emitting element The light alarm device detects a discharge in the light emitting element by detecting a potential drop caused by the charge emission due to the test light emission of the storage element that supplies the charge for causing the light emission.

  According to the configuration of the first aspect of the present invention, even with a discharge tube type light emitting element such as a xenon tube, the light emitting element can be tested regularly and automatically and without notice. It plays an effect.

  Further, according to the configuration of the second aspect of the present invention, by performing the test when the illuminance sensor detects the brightness equal to or more than a predetermined value, it is possible to achieve an effect that the test light emission is further inconspicuous.

  Further, according to the configuration of the third aspect of the present invention, a person who recognizes the test light emission by performing the test light emission when it is determined that the range in which the alarm is to be notified is unmanned at normal times. There is an effect that it is not misidentified as an alarm.

  Further, according to the configuration of claim 4 of the present invention, when the illuminance sensor detects the illuminance below the predetermined value of the notification area, either or both of the cases where the presence of a person is not detected in the notification area. Sometimes, it is determined that the test light is unmanned and the test light emission is performed, so that no person recognizes the test light emission, and an effect that it is not misidentified as an alarm is exerted.

  Further, according to the configuration of the fifth aspect of the present invention, it is possible to detect discharge in the light emitting element by detecting discharge noise or potential drop of the storage element.

BRIEF DESCRIPTION OF THE DRAWINGS The figure showing the structure of the light alarm system containing the light alarm device which concerns on Example 1 of this invention. The figure which shows the internal structure of the light alarm device 1 which concerns on Example 1 of this invention. FIG. 2 is a diagram for explaining the configuration of a light emission drive unit 10 according to a first embodiment of the present invention. The figure which shows an example of the discharge detection means 19 which concerns on Example 1 of this invention. The figure which shows the other example of the discharge detection means 19 which concerns on Example 1 of this invention. The figure which shows the internal structure of the light alarm device 100 based on the modification of Example 1 of this invention, and the light alarm device 101 based on Example 2 of this invention

Below, the Example of the light alarm device by this invention is shown.
The first and second embodiments will be described using a xenon tube, which is a discharge tube, as a light emitting element that causes flash light emission. The frequency of intermittent flash emission of the light emitting element is preferably 0.5 to 2 Hz. Although an embodiment of an automatic fire alarm system using a smoke sensor will be described as an example of a fire sensor, the fire sensor is not limited to the smoke sensor but may be a flame sensor, a heat sensor or the like.

  First, the light alarm device according to the first embodiment of the present invention will be described. FIG. 1 shows the configuration of an automatic fire alarm system including the light alarm device of the first embodiment. 1 is a light alarm device, 2 is a receiver, 3 is a smoke detector. The light alarm device 1 is connected to a receiver 2 via an alarm signal line 5, and the receiver 2 is connected to a plurality of smoke detectors 3 via a sensing signal line 4. 6 provided in the light alarm device 1 is a xenon tube which is a light emitting element. Further, a buzzer 7 may be further provided to sound an alarm at the time of a fire. In addition, it is not necessary to provide the buzzer 7 when the district acoustic device of an automatic fire alarm system, an emergency broadcast system, etc. which alert a fire with sound other than that are provided. Also, in place of the buzzer 7, voice alarm means may be provided to warn of a fire with a voice message.

  When the smoke sensor 3 senses smoke, a fire sensing signal is transmitted to the receiver 2 through the sensing signal line 4, and the receiver 2 makes a fire decision based on the fire decision means such as the storage function. When the receiver 2 determines that there is a fire, it outputs a fire alarm signal to the plurality of light alarm devices 1 through the alarm signal line 5, and the xenon tubes 6 of all the light alarm devices 1 intermittently flash light. At this time, the buzzer 7 may be sounded.

  FIG. 2 shows the internal configuration of the light alarm device 1. The xenon tube 6 and the buzzer 7 are driven by the light emission drive means 10 and the buzzer drive means 11, respectively. The light emission drive means 10 also has a discharge detection means 19 for detecting the discharge of the xenon tube 6. These drive means are controlled by the control means 14.

  FIG. 3 is a diagram for explaining the configuration of the light emission drive means 10 of the light alarm device 1 according to the first embodiment of the present invention. The light emission drive means 10 includes a booster circuit 20, a trigger means 30, and a discharge detection means 19 And consists of And these are controlled by the control means 14.

  The power supply 16 is, for example, a DC power supply device that outputs a DC voltage of about 24 V, or a battery power source, and may output a DC voltage other than 24 V. In addition, power may be supplied from an external power supply device via an electric path without providing the power supply 16. At that time, power may be supplied from an external AC power supply, and a power supply device that rectifies and outputs the power may be provided.

  The booster circuit 20 is an example of a power supply circuit that boosts the output of the power supply 16 to a voltage sufficient to discharge the xenon tube 6, and includes a switch element 21, a boost transformer 22, a diode 23, and a capacitor 24.

  The switch element 21 repeatedly turns on and off according to a control signal (repetitive on / off signal) output from the control means 14, and repeatedly and intermittently controls the power supply 16 to generate a substantially square alternating current. That is, the switch element 21 applies the output of the power source 16 to the primary side of the step-up transformer 22 as an alternating current in accordance with the control signal output from the control means 14. The step-up transformer 22 outputs an alternating voltage of about 300 V, for example, by the alternating current on the primary side. The output of the step-up transformer 22 is not limited to an AC voltage of 300 V, and as described later, the output after rectifying and storing the output of the step-up transformer 22 is sufficient to discharge the xenon tube 6 as a light emitting element. If the light emitting element is other than a xenon tube, the output may be sufficient for the light emitting element to emit light. In addition, if the light emitting element is discharged, the boosting circuit 20 may not be provided if there is no need for boosting. In that case, the light emitting element is not connected from the power supply 16 by a switch element (not shown) controlled by a control signal from the control means 14 Power may be supplied to the

  The diode 23 rectifies the output of the step-up transformer 22. Here, the diode 23 half-wave rectifies the AC voltage output from the step-up transformer 22. In place of the half wave rectification by the diode 23, full wave rectification may be performed by a bridge circuit or the like. The capacitor 24 is a capacitor as a storage element for storing a charge (electric energy) for causing the xenon tube 6 to emit light by the rectified output of the diode 23. The capacitor 24 then accumulates the charge for causing the xenon tube 6 to emit light. At this time, as charge is stored in capacitor 24, that is, as capacitor 24 is charged, voltage V across capacitor 24 is a voltage obtained by dividing the stored charge amount Q by capacitance C of capacitor 24. It rises to the value of V = Q / C. This voltage V is applied to the electrodes at both ends of the connected xenon tube 6, and charges the trigger capacitor 34 via the charging resistor 33.

  The trigger means 30 has a switch element 31 and a trigger transformer 32. The trigger means 30 outputs a light emission trigger for causing the xenon tube 6 to emit light to the trigger electrode 6 a of the xenon tube 6 by energizing the charge accumulated in the trigger capacitor 34 to the primary side of the trigger transformer 32. The light emission trigger is output based on the light emission command (trigger signal) from the control means 14.

  When the switch element 31 is turned on in response to the trigger signal, the charge stored in the trigger capacitor 34 flows to the primary side of the trigger transformer 32, an impulse voltage is induced on the secondary side, and a light emission trigger is output.

  The control means 14 outputs a control signal to the switch element 21 of the booster circuit 20 repeatedly and intermittently to charge the capacitor 24 and the trigger capacitor 34. Furthermore, the switch element 31 of the trigger means 30 sends a trigger signal (light emission command). The xenon tube 6 is made to emit light.

  A discharge detection means 19 is connected to discharge electrodes at both ends of the xenon tube 6, and discharge noise associated with light emission from the xenon tube 6 or reduction in voltage supplied to the xenon tube 6 associated with charge discharge from the capacitor 24 by light emission. Is detected by the potential drop at the point where the supply voltage to both ends of the xenon tube 6 is divided, and a discharge detection signal is output to the control means 14.

  Next, the operation of the light emission drive means 10 will be described. In the case where the xenon tube 6 is intermittently flashed by the fire alarm signal to notify an alarm, the following operation is performed. When the light alarm device 1 receives a fire alarm signal via the transmission / reception means 15, the control means 14 sends out a control signal for switching on / off the switch element 21 to the light emission drive means 10, and then turns on the switch element 31. Send a trigger signal. Then, the light emission drive means 10 causes the xenon tube 6 to emit light based on the trigger signal after charging the capacitor 24 and the trigger capacitor 34 as follows.

  The operation of charging the capacitor 24 and the trigger capacitor 34 is as follows. The control means 14 that has received the fire alarm signal via the transmission / reception means 15 outputs a control signal, which is a pulse for repeatedly turning on and off the switch element 21, to the booster circuit 20. The switch element 21 is repeatedly turned on and off based on the control signal, thereby repeatedly connecting and disconnecting the power supply 16 and the primary side of the step-up transformer 22 for boosting and outputting the voltage (for example, 24 V) of the power supply 16. . As a result, a substantially square alternating current flows on the primary side of the step-up transformer 22, and a stepped-up alternating voltage, for example, 330 V, is generated on the secondary side of the step-up transformer 22. The secondary side output of the step-up transformer 22 is half-wave rectified by the diode 23 and causes the capacitor 24 to accumulate charge. At this time, the secondary side output of the step-up transformer 22 is half-wave rectified by the diode 23, smoothed by the capacitor 24, applied to the discharge electrode of the xenon tube 6 and sent to the trigger means 30. The switch element 31 of the trigger means 30 is turned off by the control means 14 until a charge sufficient to cause the xenon tube 6 to flash is accumulated in the capacitor 24. At this time, charge is also accumulated in the trigger capacitor 34 via the charging resistor 33.

  The operation to flash the xenon tube 6 is as follows. The control means 14 opens the switch element 21 to stop the on / off operation when a predetermined time for accumulating electric charge in the capacitor 24 sufficient to cause the xenon tube 6 to flash is emitted after outputting the control signal to the booster circuit 20. Thereafter, a trigger signal (light emission command) is sent to the trigger means 30. By this trigger signal, the switch element 31 of the trigger means 30 is turned on, and the charge stored in the trigger capacitor 34 is applied to the primary side of the trigger transformer 32. Then, an impulse is generated on the secondary side of the trigger transformer 32, and this impulse is applied to the trigger electrode 6 a of the xenon tube 6. At this time, the output of the booster circuit 20 storing an amount of charge sufficient to cause the flash of the xenon tube 6 is applied to the discharge electrodes provided at both ends of the xenon tube 6, and the impulse applied to the trigger electrode 6a The xenon tube 6 starts discharging. Then, the charge stored in the capacitor 24 is consumed to flash light.

  The intermittent flash emission is performed by repeating the operation of charging the capacitor 24 and the trigger capacitor 34 and the operation of emitting the xenon tube 6.

  On the other hand, when the test light emission is performed by the xenon tube 6, the following operation is performed. The test light emission is performed in a state where the alarm signal is not supplied to the control means, that is, regularly, regularly, and causes the xenon tube 6 to emit light in a time shorter than the light emission when notifying the alarm (ie, xenon tube 6 Discharge).

  When the test light emission is performed, the operation of charging the capacitor 24 and the trigger capacitor 34 is the same as the case where the above-described xenon tube 6 is intermittently flashed to notify an alarm. However, in the test light emission, the time for which the xenon tube 6 is caused to emit light, that is, the discharge time for the xenon tube 6 is set to be shorter than that for notifying an alarm. Since human eyes have the property of integrating light, the light emission will be dark if the discharge in the xenon tube 6 is short, so that the test light emission will not be noticeable and it will not be mistaken as a warning notification. be able to. Furthermore, the test light emission interval may be longer (for example, 24 hours, one week, one month) than when alerting an alarm, and the test light emission may be made less noticeable.

  The operation of discharging the xenon tube 6 for a short time by the test light emission can be realized, for example, by reducing the amount of charge accumulated in the capacitor 24 before the xenon tube 6 is made to emit light than in the case of notifying an alarm. That is, it is preferable to charge the capacitor 24 less than when alerting an alarm, and for example, the charging time for the capacitor 24 is set to a predetermined time shorter than when alerting an alarm. The control means 14 causes the switch element 21 to be opened by stopping the control signal when the predetermined time elapses after sending the control signal for repeatedly turning on and off the switch element 21 to the booster circuit 20 and stopping the repetition of the on and off After that, the switch element 31 is turned on. As a result, the xenon tube 6 is caused to emit light with a smaller charge amount than in the case of informing an alarm, and the discharge in the xenon tube 6 is completed in a shorter time than in the case of informing an alarm.

  On the other hand, discharge detection means 19 for detecting discharge in the xenon tube 6 is connected to the discharge electrodes at both ends of the xenon tube 6. In order for the discharge detection means 19 to detect discharge in the xenon tube 6, discharge noise accompanying the light emission of the xenon tube 6 at the time of test light emission, that is, the discharge electrodes at both ends by electron avalanches in the xenon tube 6 which is a discharge tube. It can be realized by detecting an induced spike noise voltage. In this case, as shown in FIG. 4, in the discharge detection means 19, capacitors C1 and C2 for cutting a DC component are connected to connection points 19a and 19b to the discharge electrodes at both ends of the xenon tube 6, respectively. A noise detection means for detecting the AC component of the discharge noise via C2 is provided therebetween. By detecting the AC component of the discharge noise as described above, discharge noise smaller than the high voltage DC component can be detected, and the discharge in the xenon tube 6 can be detected.

  Alternatively, the discharge in the xenon tube 6 may be detected by detecting the potential drop of the capacitor 24 that supplies the charge for causing the xenon tube 6 to emit light due to the charge emission due to the test light emission. As described above, the voltage V of the capacitor 24 is a value obtained by dividing the accumulated charge amount Q by the capacitance C of the capacitor 24, and the voltage V = Q / C, so that the charge is consumed by the discharge. , The voltage V of the capacitor 24 decreases. The discharge detection means 19 in this case is, as shown in FIG. 5, an electric potential detection means at the connection point between the resistors R1 and R2 connected to the connection points 19a and 19b to the discharge electrodes at both ends of the xenon tube 6 respectively. To detect a potential drop equal to or greater than a predetermined value.

  In any of the above cases, when the discharge detection means 19 detects the discharge due to the test light emission of the xenon tube 6, the discharge detection means 19 controls the discharge detection signal indicating that the discharge is detected through the output point 19c. Send to means 14. Then, the control means 14 determines whether the xenon tube 6 is normal or abnormal based on the discharge detection signal, and when it is determined that the xenon tube 6 is abnormal, the light emitting element abnormal signal is received via the transmitting / receiving means 15. And the receiver 2 which has received the light emitting element abnormality signal, warns of the abnormality of the light alarm device 1. In the above, even if the value detected by the discharge detection means 19 is sent to the control means 14 and the control means 14 determines whether the xenon tube 6 is normal or abnormal based on the detected value. Good.

  In this embodiment, the light alarm device 101 performs test light emission when the notification area for notifying an alarm is unmanned, instead of shortening the light emission time of test light emission in the first embodiment than when notifying an alarm. Show about.

  As shown in FIGS. 1 and 6, the light alarm device 101 further determines whether or not the notification area for notifying an alarm is unmanned in the light alarm device 1 of the first embodiment. And unmanned determination means for determining whether or not the notification area is unmanned based on the detection result of the surrounding condition detection means. The surrounding condition detecting means is an environmental illuminance measuring means comprising the illuminance sensor 8, the amplifier circuit 12 and the A / D converter 13. Further, the unmanned person judging means is provided in the control means 14a as a functional configuration which judges that the notification area is unmanned when the environmental illuminance measured by the environmental illuminance measuring means is illuminance equal to or less than a predetermined fixed value. The other configuration is as described in the above embodiment.

The brightness of the environment in which the light alarm device 101 is placed is detected by the illuminance sensor 8, amplified by the amplifier circuit 12, converted into a digital signal by the A / D converter 13, and controlled as a measurement value of the environmental illuminance It is input to 14a. Then, the control means 14a controls the light emission drive means 10 to perform test light emission to cause the xenon tube 6 to emit light periodically, under the condition that it is judged that the unmanned judgment means is unmanned at normal times and unmanned judgment means. Do. When the test light is emitted, there are no people in the vicinity, so no one sees the test light, and even if the test light is emitted, there is no possibility that it is misidentified as an alarm. Therefore, in the present embodiment, it is not necessary to control the light emission time of the test light emission shorter than when notifying the alarm as in the first embodiment, but the light emission time of the test light emission may be shortened. The unmanned person determining means may be determined as unmanned on condition that the environmental illuminance measured by the environmental illuminance measuring means is illuminance equal to or less than a predetermined fixed value and a predetermined time has elapsed. By doing this, it can be determined more reliably that there is no one around.
[Modification]

The above embodiment may be modified as follows. Also, the following modifications may be combined with one or more other modifications.
[Modification 1]

As a modified example of the first embodiment, an example of a light alarm device 100 that controls the timing at which the test is performed based on the environmental illuminance is shown. In the first embodiment, the test light emission is made inconspicuous by causing the test light emission in a short time, but in this modification, the test light emission is performed at a timing that is less noticeable.

As shown in FIGS. 1 and 6, the light alarm device 100 further includes, in addition to the light alarm device 1 of the first embodiment, an environmental illuminance measurement unit including an illuminance sensor 8, an amplification circuit 12, and an A / D converter 13. In order to be able to measure environmental illumination. The other configuration is as described in the first embodiment. The brightness of the environment in which the light alarm device 100 is placed is detected by the illuminance sensor 8, amplified by the amplifier circuit 12, converted into a digital signal by the A / D converter 13, and controlled as a measurement value of the environmental illuminance It is input to 14. Then, the control means 14 performs test light emission when there is an illuminance equal to or more than a predetermined value. That is, under the condition of “normally” and “periodically (every predetermined cycle)” to perform test light emission, “the environmental illuminance is a predetermined value or more”, that is, bright ambient light is added to the test light emission conditions. By doing this, the test can be performed without making the test emission more noticeable. The light emitted from the xenon tube 6 may not be incident on the illuminance sensor 8 so that the light receiving element of the illuminance sensor 8 is saturated and the response speed of the illuminance sensor 8 does not decrease. At this time, the light shielding wall 9 may be provided between the xenon tube 6 and the light receiving portion of the illuminance sensor 8.
[Modification 2]

In the first embodiment, the control means 14 controls the capacitor 24 of the booster circuit 20 to be charged in a shorter time than when notifying an alarm, thereby reducing the charge accumulation for discharging in the xenon tube 6, Although the light emission time of the test light emission performed regularly and regularly is shortened, it is not limited to this.
For example, when the voltage V across the capacitor 24 during charging is measured using the potential detection means provided in the discharge detection means 19 shown in FIG. 5 and the voltage V becomes a predetermined value lower than that when an alarm is notified In addition, the control means 14 may output a trigger signal. That is, since the charge amount Q is the product of the voltage V and the capacitance C of the capacitor 24, the charge stored in the capacitor 24 when the voltage V is a predetermined value lower than the value at which the alarm is notified. The amount is smaller than that for alerting the alarm, and if discharge is performed by the xenon tube 6 at this time, the light emission time can be shorter than that for alerting the alarm, and test emission can be performed.
Also, for example, a third switch element (not shown) is provided between the output of the booster circuit 20 in FIG. 3 and the discharge electrode of the xenon tube 6 to turn on when the xenon tube 6 is made to emit light. The on time of the switch element may be controlled by the control means 14.
That is, instead of shortening the charging time of the capacitor 24 and performing test light emission, the on time of the third switch element is shortened. At this time, even if a large amount of charge is accumulated in the capacitor 24 for test light emission, the third switch element turned on only for a short time interrupts supply of the charge, so the charging time of the capacitor 24 is particularly shortened. There is no need.
[Modification 3]

The surrounding condition detecting means of the second embodiment is not limited to the environmental illuminance measuring means shown in the second embodiment, as long as it can detect that there is no person in the surroundings. For example, a human sensor that detects the presence of a person in the notification area is a peripheral situation detection unit, and when the human sensor does not detect the presence of a person, that is, when no person is detected in the notification area It may be determined that the determination means is unmanned. The unmanned person judging means may be judged as unmanned on condition that a predetermined time has elapsed since the human sensor did not detect the presence of a person. By doing this, it can be determined more reliably that there is no one around.
[Modification 4]

In the first and second embodiments, discharge detection means for detecting the light emission of the xenon tube 6 supplies discharge noise associated with the light emission of the xenon tube 6 or a charge for causing the xenon tube 6 to emit light at the time of test light emission. Although the potential drop due to the charge discharge due to the test light emission of the capacitor 24 as the storage element is detected, the present invention is not limited to this, and it is sufficient to detect the discharge in the xenon tube. For example, the discharge in the xenon tube 6 may be detected by detecting the current flowing from the booster circuit 20 or the power supply 16 to the xenon tube 6. Further, for example, a wiring pattern running parallel to the path of the current flowing from the booster circuit 20 or the power supply 16 to the xenon tube 6 is provided, and inductive noise generated in the wiring pattern due to the current flowing to the xenon tube 6 is detected. The discharge in the xenon tube 6 may be detected by Further, for example, a temperature detection means such as a thermistor is provided in contact with or in the immediate vicinity of the xenon tube 6 to detect a temperature rise due to heat generation accompanying the discharge in the xenon tube 6 to detect discharge in the xenon tube 6 You may
[Modification 5]

In the first, second, and third embodiments and the modification, the xenon tube, which is a discharge tube, is used as a light emitting element to emit flash light. However, the present invention is not limited to this. Just do it. For example, another discharge tube may be used as a light emitting element, and a light emitting element such as a high brightness LED may be used.
[Modification 6]

  In the first and second embodiments, the test light emission is performed regularly in normal times, but the test light emission may be performed when the above-mentioned test light emission conditions become uniform after the predetermined time interval has elapsed, After the predetermined time, the test light may be emitted when the conditions of the test light described above are met.

1, 100, 101 light alarm devices, 2 receivers, 3 smoke detectors, 4 sensing signal lines, 5 alarm signal lines, 6 xenon tubes (light emitting elements), 6a trigger electrodes, 7 buzzers, 8 illuminance sensors, 9 light shielding walls , 10 light emission drive means, 11 buzzer drive means, 12 amplification circuits, 13 A / D converters, 14 and 14a control means, 15 transmission / reception means, 16 power supplies, 19 discharge detection means, 20 boost circuits, 21 switch elements, 22 boost transformers , 23 diodes, 24 capacitors, 30 trigger means, 31 switch elements, 32 trigger transformers, 33 charging resistors, 34 trigger capacitors

Claims (5)

A light emitting element,
A light emission drive unit for driving the light emitting element;
Control means for controlling the light emission drive means;
Equipped with
In the light alarm device, in which the control means controls the light emission drive means to intermittently light the light emitting element to flash an alarm by receiving an alarm signal indicating an emergency such as a fire.
Discharge detection means for detecting discharge in the light emitting element;
The light emission drive means has a switch element which is turned on when the light emitting element is made to emit light.
The control means performs test light emission in which the light emitting element is caused to emit light periodically in a time shorter than the light emission when controlling the light emission driving means to notify an alarm in normal time by the on time of the switch element. When the discharge detection means detects the discharge in the light emitting element, the light emitting element is judged to be normal.
Light alarm device. Equipped with an illuminance sensor,
The control means performs the test light emission when the illuminance sensor detects the brightness equal to or more than a predetermined value.
The light alarm device of claim 1. A light emitting element, a light emission driving means for driving the light emitting element, and a control means for controlling the light emission driving means;
Equipped with
In the light alarm device, in which the control means controls the light emission drive means to intermittently light the light emitting element to flash an alarm by receiving an alarm signal indicating an emergency such as a fire.
Discharge detection means for detecting discharge in the light emitting element;
A surrounding condition detection unit that detects a surrounding condition in order to determine whether the notification area for notifying the warning is unmanned;
Unmanned determination means for determining whether or not the notification area is unmanned based on the detection result of the surrounding condition detection means;
Equipped with
The control means controls the light emission drive means to perform test light emission to cause the light emitting element to emit light when the unmanned judgment means determines that the unmanned judgment means is unmanned normally, and the discharge detection means performs the light emission Determining that the light emitting element is normal by detecting a discharge in the element;
Light alarm device. The surrounding situation detection means
An illuminance sensor for detecting the illuminance of the notification area, in order to determine that the unmanned determination means is unmanned when the illuminance of the notification area is equal to or less than a predetermined value;
A human sensor for detecting the presence of a person in the notification area, in order to determine that the unmanned person determination means is an unmanned person when the presence of a person is not detected in the notification area;
Either or both,
The light alarm device of claim 3. The discharge detection means is a discharge noise associated with light emission of the light emitting element at the time of the test light emission, or a potential decrease associated with charge emission by the test light emission of a storage element supplying a charge for causing the light emitting element to emit light. To detect discharge in the light emitting element by detecting
The light alarm device according to any one of claims 1 to 4.

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