JP5875394B2 - Alarm system - Google Patents

Description

  The present invention relates to an alarm system for monitoring a line fault occurring in an alarm system including an optical alarm device.

  In a building such as a hospital or a hotel, when a disaster such as a fire occurs, an alarm system is installed to detect the disaster and notify the people in the building of the occurrence of the disaster. In such an alarm system, the occurrence of a disaster is generally notified by sound such as a buzzer or a bell. 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, an alarm system for notifying the occurrence of a disaster by using a flashlight having high visibility together with sound has been proposed (for example, see Patent Documents 1 to 3). According to such an alarm system, since the occurrence of a disaster is notified not only by sound but also by strong light, for example, an effective alarm can be given even to a hearing-impaired person. Hereinafter, such a light alarm is referred to as a light alarm in distinction from conventional display notifications such as LEDs and red lamps.

  For the purpose as described above, the light alarm is performed with white light (flash light) having high luminous intensity, which is pulsed from, for example, a xenon lamp. For this reason, compared with the conventional display notification, for example, a hearing-impaired person can recognize the occurrence of a disaster early and reliably.

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

  As in the technique described in Patent Document 1, in the case of performing a light alarm in addition to the conventional acoustic alarm, there is an advantage that an effective alarm can be performed even for a hearing impaired person. However, there is a demerit that it is necessary to introduce a system for performing a new light alarm, which takes time and cost in various aspects. In particular, when a new light alarm system using light is introduced separately from the conventional alarm system, such a cost burden becomes very heavy. For this reason, when introducing an optical alarm system, it is conceivable to reduce the cost by using an existing alarm system as much as possible. For example, as shown in FIG. 1, control devices 40a to 40n are connected to alarm lines 51 (51a to 51n) drawn from the receiving device 30 of the conventional alarm system, and acoustic alarms are respectively received from the control devices 40a to 40n. For example, a bell control line (hereinafter referred to as “acoustic alarm line”) BL (BL1 to BLn) and a light alarm device control line (hereinafter referred to as “light alarm line”) KL1 to KLn, which are devices, are pulled out. An optical alarm device is connected to KL (KL1 to KLn). Each line consists of a pair of two control lines. Further, as shown in FIG. 2, a disaster monitoring line DL to which a disaster detection device is connected is drawn out from the receiving device 30 separately from the alarm line, and a disaster detection device such as a fire disaster detection device is connected thereto. (Not shown). The disaster detection unit 31 of the receiving device 30 receives the operation signal of the disaster detection device via the disaster monitoring line DL, and based on this, the reversing unit 33 switches the polarity setting of the voltage applied to the necessary alarm line 51. And reverse (referred to as "polarization") to perform the necessary bell control and light alarm control.

  Here, in the conventional system in which the control device 40 is not connected and the light alarm is not performed, only the bell 11 is directly connected to the alarm line 51. Even in a system for connecting a light alarm device, it is conceivable to directly connect the light alarm devices 21a to 21n here. That is, it is conceivable that the bell 11 and the light alarm device 21 are mixedly connected to the alarm line 51. However, in such an alarm system, a plurality of acoustic alarm devices such as the bell 11 are connected in parallel to one alarm line. When the number of acoustic alarm devices to be connected increases, the receiving device 30. Since the power to be supplied to the line increases from the power supply capacity of the receiving device, the number of connectable devices is originally limited. For this reason, since it was difficult to further connect an optical alarm device in parallel to this line, the configuration as shown in FIG. 1 is adopted, and the optical alarm device 21 is connected to the optical alarm device 21 from the control device 40 via the optical alarm line KL. Power is supplied.

  By the way, the alarm system always performs a process of detecting whether or not a connection failure (hereinafter referred to as “track failure”) such as a disconnection of a line has occurred in the wiring (disaster monitoring line, alarm line, etc.) in the alarm system. Or it may be required to carry out regularly. However, the receiving device 30 of the existing alarm system is provided with only one failure detection unit 33 for detecting a line failure in the system for each line directly drawn from the receiving device as shown in FIG. . For this reason, in the case of the alarm system as shown in FIG. 1, it is necessary to newly provide a failure detection unit for detecting a line failure of the added optical alarm line in the receiving device 30. In this case, it is necessary to take measures such as replacing the receiving device with a new one. For example, cost reduction is not sufficient.

  The present invention has been made in view of the above circumstances, and its purpose is to add an optical alarm device to a conventional alarm system, and to provide an alarm system capable of performing an optical alarm in addition to an acoustic alarm. An object of the present invention is to provide an alarm system that can realize line fault monitoring of an optical alarm line of the system at a low cost.

In order to solve the above-described problem, the alarm system of the present invention is configured such that a control device is connected to an alarm line drawn from a receiving device that detects a line fault, and a plurality of acoustic alarm devices that perform alarms using sound from the control device are arranged in parallel. An acoustic alarm line to be connected and an optical alarm line for connecting a plurality of optical alarm devices for alarming using light in parallel are drawn out. Further, in the control device, the alarm line and the acoustic alarm line are connected, The optical warning line is configured to be independent from the warning line and the acoustic warning line. In addition, the control device outputs a failure detection unit that detects a line failure that occurs in the optical alarm line, and when the detection unit detects the occurrence of a line failure in the optical alarm line, the occurrence of the line failure is output to the alarm line. And a failure transfer section. The receiving device includes a detection unit that detects a line fault that has occurred in the acoustic alarm line and a line fault that has occurred in the optical alarm line via the alarm line, and a voltage that is applied to the alarm line when disaster detection information is received. A polarity switching unit that reverses the polarity setting from the polarity setting in the first state for detecting a line fault to the polarity setting in the second state that causes the acoustic alarm device to ring , and the control device rings the acoustic alarm device. When receiving a signal of a second state to be, characterized by Rukoto a function of switching to the operating state for emitting the light alarm device from the operating state to detect occurrence of a line fault of the optical alarm line.

Since the alarm system is configured as described above, the line alarm, for example, when at least one of short circuit and disconnection occurs in the acoustic alarm line, the alarm system is connected to the acoustic alarm line via the acoustic alarm line and the alarm line. It is possible to detect that a line failure has occurred. Also, the alarm system detects the occurrence of a line fault in a detection unit provided in the control device when a line fault occurs in the optical alarm line, for example, at least one of short circuit and disconnection, and the control is performed based on the detection result. When the failure transfer unit provided in the device outputs the occurrence of the line fault to the alarm line, the receiver detects this, and further receives disaster detection information, the polarity setting of the voltage applied to the alarm line is It is possible to switch from the first state polarity setting for detecting a failure to at least the second state polarity setting for sounding the acoustic alarm device. Thereby, it can switch from the operation state which detects generation | occurrence | production of the line failure of a light alarm line to the operation state which light-emits a light alarm apparatus.

  Therefore, when a light alarm device is added to the conventional alarm system, and the alarm system can perform an optical alarm in addition to the acoustic alarm, the configuration of the alarm line monitoring of the alarm line in the conventional receiver device is used. The line fault monitoring of the optical alarm line of the system can be realized at a low cost.

  According to a preferred aspect, the failure transfer unit provided in the control device includes a relay circuit, and the failure transfer unit operates the relay circuit based on the detection result of the detection unit to the alarm line. Outputs the occurrence of a line fault at.

  When configured in this way, based on the detection result of the detection unit provided in the control device, it is possible to switch the relay circuit and output the occurrence of a line fault in the optical alarm line to the alarm line, and thereby the line to the receiver The occurrence of a failure can be detected.

  Moreover, according to a preferable aspect, the first relay circuit that outputs that the relay circuit is in a short circuit state and the second relay circuit that outputs that the relay circuit is in a disconnected state are provided, and A first relay drive unit that operates the first relay circuit when a short circuit occurs in the optical alarm line, and a second relay drive that operates the second relay circuit when a disconnection occurs in the optical alarm line. May be provided.

  According to this configuration, when the short circuit occurs in the optical alarm line, the failure transfer unit drives the first relay circuit to output to the alarm line that the short circuit has occurred. When a disconnection occurs in the alarm line, the second relay circuit is driven and output to the alarm line that the disconnection has occurred. Thereby, the receiving device can detect the occurrence of a line fault.

  According to the alarm system and the control device of the present invention, when an optical alarm device is added to the conventional alarm system and the alarm system can perform an optical alarm in addition to an acoustic alarm, the optical alarm line of the system is used. It is possible to provide an alarm system that can realize fault monitoring at a low cost.

It is a figure which shows roughly the structure of the alarm system which concerns on the past and embodiment of this invention. It is a figure which shows roughly the structure of the receiver which concerns on the past and embodiment of this invention. It is a figure for demonstrating the feed wiring which concerns on embodiment of this invention. It is a figure which shows the circuit structure of the control apparatus which concerns on embodiment of this invention. It is a figure which shows operation | movement of the control apparatus which concerns on embodiment of this invention. It is a figure which shows operation | movement of the control apparatus which concerns on embodiment of this invention. It is explanatory drawing of an example of operation | movement of the alarm system which concerns on embodiment of this invention.

  Hereinafter, an alarm system 1 and a control device 40 according to an embodiment of the present invention will be described with reference to the drawings. The overall configuration of the alarm system 1 is the same as that already described with reference to FIG. 1, and the configuration of the receiving device 30 is the same as that already described with reference to FIG. Detailed description will be omitted, and the configuration which is a feature of the present invention will be described in detail below.

  In the present embodiment, an alarm line is drawn out as a primary line from the receiving device 30, and a plurality of bells 11 (11a to 11n), which are acoustic alarm devices, are connected in parallel as secondary lines from the control device 40. The alarm line BL and the optical alarm line KL for connecting a plurality of optical alarm devices 21 (21a to 21n) in parallel are drawn out.

  A plurality of bells 11 are connected in parallel to one acoustic alarm line BL, or a plurality of light alarm devices 21 are connected in parallel to one optical alarm line KL. For example, FIG. 3 shows a case where a plurality of bells 11 are connected in parallel to one acoustic alarm line BL. R is a terminating resistor or terminator.

  As illustrated in FIG. 4, the control device 40 includes, for example, a power supply 60, a failure transfer unit 41, and a detection unit 42. The power source 60 supplies circuit operating power in the control device 40 and driving power for the light alarm device 21. When the detection unit 42 detects the occurrence of a line failure in the optical warning line KL, the failure transfer unit 41 outputs the occurrence of the line failure to the warning line 51 in response to this, and similarly, the sound warning line BL When a line failure occurs, the occurrence of the line failure is output to the alarm line 51. Here, the line fault that occurs in the optical alarm line KL and the acoustic alarm line BL is, for example, a short circuit or a disconnection.

  In FIG. 4, for simplification of illustration and explanation, only one bell 11 connected to the acoustic alarm line BL and one optical alarm device 21 connected to the optical alarm line KL are shown.

  In the control device 40, the alarm line 51 is connected to the acoustic alarm line BL. The optical alarm line KL is configured to be independent from the alarm line 51 and the acoustic alarm line BL.

  Next, the configuration of the failure transfer unit 41 will be described. The terminal BC and the terminal Bin are connected to the two terminals BC and B of the receiving device 30 via the alarm lines 51 (51 and 50), respectively. In addition, the control device 40 has a terminal Bout. In the acoustic alarm line BL, the control line of the bell 11 is connected to the terminal Bout, and the common line is connected to the terminal BC. The bell 11 connected to the acoustic alarm line BL is connected by the wiring shown in FIG. R1 is a terminating resistor or terminator, and corresponds to the terminating resistor or terminator R in FIG.

As shown in FIG. 2, the reversing unit 32 of the receiving device 30 is normally connected to a power source (for example, 24V) to one terminal BC from which the alarm line 51 is drawn, and the other terminal B is set to 0V. (The polarity setting of the first state). When the disaster detection unit 31 of the receiving device 30 detects the occurrence of a disaster via the disaster monitoring line DL, the receiving device 30 should output an alarm by sound and light corresponding to the disaster monitoring line DL where the disaster is detected. Contrary to the normal operation, the alarm line 51 is subjected to switching control so that the terminal B is set to 24V and the terminal BC is set to 0V (polarity setting in the second state) and output to the alarm line 51. For this reason, the inputs to the terminals Bin and BC of the control device 40 are, for example, 0 V and 24 V, respectively, during normal times, and 24 V and 0 V during alarm output based on the disaster detection of the disaster detection unit 31. In this manner, by reversing the voltage applied to each control line (referred to as “polarization”) with respect to a pair of alarm lines 51 composed of two control lines, an alarm is issued from the bell 11 and the light alarm device 21. Is output. Specifically, when the disaster detection unit 31 of the receiving device 30 detects the operation of the disaster detector (occurrence of a disaster) based on a signal (disaster detection information) from the disaster monitoring line DL, the driving voltage is applied to the relay driving unit RY. Is applied to switch the relay contact r1 to the terminal B side and the relay contact r2 to the terminal BC side to output the disaster occurrence information to the failure transfer unit 41 of the control device 40. The failure detection unit 33 of the receiver 30 is provided between the power supply 24V and the terminal BC, monitors the current flowing through the alarm line 51, and detects the presence or absence of a line failure according to the change in the current. For this reason, it is possible to detect line faults in the acoustic alarm line BL and the optical alarm line KL via the alarm line 51 regardless of whether it is normal or a disaster occurs. The relay driving unit RY, the relay contact r1, and the relay contact r2 are collectively referred to as “relay RY”, which is referred to as a fourth relay.

  The input from the terminal Bin branches at the connection point P2. One of the branches is further branched at the connection point P4 via the connection point P3 and the relay contact t2 (second relay circuit), and then this one is connected to the terminal Bout. The other branched at the connection point P2 is connected to the connection point P5 via the diode D1 and the relay drive unit BN. This connection point P5 is connected to the terminal BC. The relay drive unit BN drives relay contacts b1, b2, and b3 described later when a predetermined voltage is applied. Further, the relay contact b1 is connected to the connection point P3. The relay drive unit BN and the relay contacts b1, b2, and b3 are collectively referred to as “relay BN”, which is referred to as a third relay.

  The input from the terminal BC passes through the connection point P5 and then reaches the relay contact b1 via the diode D3 and the relay contact t1 (first relay circuit). Further, the relay contact b1 is configured to be connectable to the other input branched at the connection point P4. Therefore, the relay contact b1 is configured to be switched to either the relay contact t1 side or the connection point P4 side.

  The relay contact b1 is driven based on a change in voltage applied to the relay drive unit BN as described above. The relay contact b1 is normally connected to the relay contact t1 side. However, if the receiving device 30 determines that a disaster has occurred based on the signal from the disaster monitoring line DL and the voltage applied to the terminals B and BC by the receiving device 30 is inverted accordingly, Thus, a driving voltage is applied to the relay driving unit BN. In response to this, the relay contact b1 is driven, and the relay contact b1 is switched from the relay t1 side to the connection point P4 side. Thereby, the bell 11 connected to the acoustic warning line BL starts to ring.

  The relay contacts t1 and t2 are driven by relay drive units T1 and T2 (described later) of the detection unit 42, respectively. Then, the relay contact t1 is switched so as to be in contact with and separated from the terminal Bout, and the relay contact t2 is switched into and away from the terminal Bout. The relay drive unit T1 and the relay contact t1 are collectively referred to as “relay T1”, and the relay drive unit T1 and the relay contact t2 are collectively referred to as “relay T2”, which are respectively referred to as “first relay” and “second relay”. "

  Next, the detection unit 42 will be described. The detection unit 42 includes a disconnection short circuit detection circuit 43. The disconnection short circuit detection circuit 43 is a circuit that detects a line failure of the optical alarm line KL based on a change in voltage or current.

  The disconnection short circuit detection circuit 43 includes, for example, a relay contact b2, a relay driving unit T1 (first relay driving unit), and a relay driving unit T2 (second relay driving unit). Further, the relay driving units T1 and T2 are connected to the ground (0 V) and the relay contact b3. Further, the detection unit 42 is connected to the optical alarm line KL via the relay contacts b2 and b3. R2 is a terminating resistor or terminator.

For example, when a short circuit occurs in the optical alarm line KL at the normal time when no disaster is detected, the voltage applied to the relay drive unit T1 changes, and the relay contact t1 is driven based on the change in the voltage. More specifically, based on the change in the voltage, the relay contact t1 is switched from a state separated from the cathode of the diode D3 (see: FIG. 4) to a state connected to the cathode of the diode D3. When the light alarm line KL is disconnected, the voltage applied to the relay drive unit T2 changes, and the relay contact t2 is driven based on the change in the voltage. More specifically, based on the change in the voltage, the relay contact t2 is switched from the state connected to the terminal Bout (see: FIG. 4) to the state separated from the terminal Bout. For this reason, since the terminal Bin and the terminal BC are conducted and the alarm line 51 is short-circuited, the current flowing through the alarm line 51 is increased. The failure detection unit 33 of the receiving device 30 can detect that a line failure due to a short circuit (of the optical warning line KL) has occurred based on this current change.

  The relay contacts b2 and b3 are driven based on a change in voltage applied to the relay drive unit BN, similarly to the relay contact b1. Further, the relay contacts b2 and b3 are normally located in a state where the light alarm device 21 does not emit light (see FIG. 4). However, when the receiving device 30 reverses the terminals B and BC when the disaster occurs and the voltage applied to the relay driving unit BN changes, the relay contact is set so that the light alarm device 21 is in a state of emitting light. b2 and b3 are driven. As a result, the light alarm device 21 starts to emit light.

  Next, an operation when the receiving device 30 detects a line failure will be described. Hereinafter, a case where a line failure has occurred in the optical alarm line KL will be described. In the case where a line fault occurs in the acoustic alarm line BL, the occurrence of the fault can be detected by a change in voltage or current between the terminals B and BC as in the past. Detailed description is omitted.

  FIG. 5 is an operation explanatory diagram when a short circuit occurs in the optical alarm line KL. As indicated by the white arrow in the figure, when a short circuit occurs in the optical alarm line KL, the voltage (voltage between terminals B and BC) or current (current flowing through the optical alarm line KL) of the optical alarm line KL changes. Based on this change in voltage or current, the disconnection short circuit detection circuit 43 of the detection unit 42 detects a short circuit of the optical alarm line KL. In this case, the disconnection short circuit detection circuit 43 of the detection unit 42 controls the voltage applied to the relay drive unit T1, so that the relay contact t1 is separated from the cathode of the diode D3 as shown by the arrow in the figure. Connect to the cathode. As a result, as shown by the bold line in the figure, the terminals B and BC are brought into conduction and are short-circuited. Accordingly, a voltage value or a current value within a predetermined range in which a failure occurs is defined between the terminal B and the terminal BC, and the failure detection unit 33 of the receiving device 30 is based on the voltage value or the current value (failure information). Detects the occurrence of a line fault.

  FIG. 6 is an operation explanatory diagram when a disconnection occurs in the optical alarm line KL. As indicated by the white arrow in the figure, when a break occurs in the optical alarm line KL, the voltage (voltage between terminals B and BC) or current (current flowing through the optical alarm line KL) of the optical alarm line KL changes. Based on this change in voltage or current, the disconnection short circuit detection circuit 43 of the detection unit 42 detects disconnection of the optical alarm line KL. In this case, the disconnection short circuit detection circuit 43 controls the voltage applied to the relay drive unit T2 to change the voltage applied to the relay drive unit T2. Based on the change in the voltage, the relay contact t2 is switched from the state connected to the terminal Bout to the separated state, as indicated by an arrow in the figure. As a result, as shown by the bold lines in the figure, the terminals B and BC are opened (disconnected). Accordingly, the voltage value between the terminal B and the terminal BC becomes a voltage value within a predetermined range defined as the occurrence of a line fault, or the current flowing through the alarm line 51 becomes a current value within a predetermined range defined as the occurrence of the line fault. The 30 failure detection unit 33 detects the occurrence of a line failure based on the voltage value or current value (failure information).

  Next, referring to FIG. 7, for example, the operation of the alarm system 1 when a disaster detection device (not shown) detects the occurrence of a disaster when a line failure has occurred in the optical alarm line KL on a predetermined floor. I will explain. In the following, a case where a short circuit has occurred in the optical alarm line KL will be described as an example of a line failure.

  When the optical alarm line KL is short-circuited, the relay contact t1 is connected to the terminal BC as described above with reference to FIG. And when the disaster detection part 31 of the receiver 30 detects a disaster occurrence, the voltage applied to terminal BC is changed (polarization). As a result, the voltage applied to the relay drive unit BN changes, switching the relay contact b1 to the side where the bell 11 rings and the relay contacts b2 and b3 to the side where the light alarm device 21 emits light. By switching the relay contact b1, the terminal B and the terminal BC are connected through a path indicated by S1 to S4 in the drawing.

  For example, in a predetermined floor where an optical alarm device 21 of an optical alarm circuit KL for outputting an optical alarm is installed, the alarm system 1 emits light (alarms) because a short circuit occurs in the optical alarm circuit KL. However, since the sound alarm line BL is independent of the light alarm line KL, the bell 11 connected to the corresponding sound alarm line BL can be sounded without being affected by the sound alarm line BL. .

  Therefore, even if a disaster occurs when a short circuit occurs in the optical alarm line KL, an acoustic alarm can be performed using the bell 11 of the acoustic alarm line BL corresponding to the optical alarm line KL in which the short circuit has occurred.

  According to the alarm system 1 configured as described above, when at least one of a short circuit and a disconnection occurs in the acoustic alarm line BL, the receiving device 30 causes a failure in the line via the acoustic alarm line BL and the alarm line 51. The occurrence can be detected. Further, in the alarm system 1, when at least one of the short circuit and the disconnection occurs in the optical alarm line KL, the detection unit 42 detects the occurrence of the failure, and the failure transfer unit 41 detects the failure according to the detection result. The occurrence can be output to the alarm line 51.

  Therefore, when an optical alarm device is added to an alarm system that performs an acoustic alarm by a conventional bell, and an alarm system that can also perform an optical alarm in addition to an acoustic alarm, conventionally, this is used as a bell control line (acoustic alarm). The line fault monitoring of the optical alarm control line of the system can be realized at a low cost while utilizing the connection fault monitoring configuration of the alarm line 51 as the line) as much as possible.

  Further, the failure transfer unit 41 includes relay contacts t1 and t2, and the failure transfer unit 41 operates the relay contacts t1 and t2 based on the detection result of the detection unit 42, thereby causing the alarm line 51 to detect a failure. Output occurrence. As a result, the receiving device 30 can detect the occurrence of a failure.

  As described above, the failure transfer unit 41 includes the relay contact t1 that outputs that the short circuit has been established and the relay contact t2 that outputs that the circuit has been disconnected. A relay drive unit T1 that operates the relay contact t1 when a short circuit occurs in the alarm line KL and a relay drive unit T2 that operates the relay contact t2 when a disconnection occurs in the optical alarm line KL are provided.

  Then, when the short circuit occurs in the optical alarm line KL, the failure transfer unit 41 outputs to the alarm line 51 that the short circuit has occurred in the line, and when the disconnection occurs in the optical alarm line KL, It outputs to the alarm line 51 that the line has been disconnected. Thereby, the receiving apparatus 30 can detect the occurrence of a line fault.

  Furthermore, in the alarm system 1, when the receiving device 30 detects the occurrence of a disaster, the reversing unit 32 polarizes the voltage applied to the alarm line 51. That is, for example, the polarity setting of the terminals BC and B connected to the alarm line 51 is changed from the polarity setting in a state in which the line failure of the acoustic alarm line BL and the optical alarm line KL is detected (for example, the terminal BC is 24V and the terminal B is 0V). The polarity is switched to at least the state in which the buzzer 11 sounds (for example, the terminal BC is 0 V and the terminal B is 24 V), and is inverted. Accordingly, the receiving device 30 outputs disaster occurrence information indicating the occurrence of the disaster to the failure transfer unit 41 via the alarm line 51. When the failure transfer unit 41 receives the disaster occurrence information, And the reception result of the disaster occurrence information can be reflected on the detection unit 42. The detector 42 receives the reflection of the reception result and operates the relay contacts b2 and b3 to cause the light alarm device 21 to emit light. In this case, since the optical alarm line KL is configured independently of the alarm line 51 and the acoustic alarm line BL, the disaster detection unit 31 of the receiving device 30 even when a line failure occurs in the optical alarm line KL. When the occurrence of a disaster is detected, the voltage applied to the alarm line 51 corresponding to the disaster monitoring line DL where the disaster is detected is reversed, the drive voltage is applied to the relay drive unit BN, and the relay contact b1 is connected to the relay t1 side. Is switched to the connection point P4 side, the alarm system 1 can ring the bell 11.

  Therefore, even if a line failure has occurred in the optical warning line KL at the time of the disaster occurrence, an acoustic alarm by the bell 11 can be performed as in the conventional case, and the occurrence of the disaster can be notified to people in the building. .

DESCRIPTION OF SYMBOLS 1 ... Alarm system 11 (11a-11n) ... Bell 21 (21a-21n) ... Light alarm device 30 ... Receiver 31 ... Disaster detection part 32 ... Polarization part 33- .. Fault detection unit 40 (40a to 40e)... Control device 41... Fault transfer unit 42... Detection unit 43. ... Alarm control lines (alarm lines)
b1, b2, b3 ... relay contacts t1, t2 ... relay contacts BL (BL1 to BLn) ... bell control lines (acoustic alarm lines)
BN, T1, T2... Relay drive unit KL (KL1 to KLn)... Control line (light alarm line) of light alarm device
DL: Disaster monitoring lines S1 to S4: Route

Claims (5)

A control device is connected to an alarm line drawn out from a receiving device that detects a line fault, and an acoustic alarm line that connects a plurality of acoustic alarm devices that warn using sound from the control device in parallel, and light that uses light to warn An alarm system in which an optical alarm line connecting a plurality of alarm devices in parallel is drawn out,
In the control device, the alarm line and the acoustic alarm line are connected, while the optical alarm line is configured to be independent from the alarm line and the acoustic alarm line,
The controller is
A detection unit for detecting a line fault occurring in the optical alarm line;
When the detection unit detects the occurrence of a line fault in the optical alarm line, a fault report unit that outputs the occurrence of the line fault to the alarm line;
With
The receiving device is:
A fault detection unit that detects a line fault that has occurred in the acoustic alarm line and a line fault that has occurred in the optical alarm line via the alarm line;
When the disaster detection information is received, the voltage applied to the alarm line is changed from a first state that detects the line fault to a second state that causes at least the acoustic alarm device to ring .
When the control device receives a signal in the second state that rings the acoustic alarm device, the control device switches from an operation state that detects occurrence of a line fault of the optical alarm line to an operation state that causes the optical alarm device to emit light. alarm system according to claim Rukoto provided. The fault notification unit provided in the control device includes a relay circuit,
The failure transfer unit operates the relay circuit based on a detection result of the detection unit, and outputs the occurrence of a line failure in the optical alarm line to the alarm line. Alarm system. The relay circuit is
A first relay circuit that outputs a short-circuit state;
A second relay circuit that outputs a disconnection state;
With
The detector is
A first relay driving unit for operating the first relay circuit when a short circuit occurs in the light alarm line;
A second relay driving unit that operates the second relay circuit when a break occurs in the light alarm line;
The alarm system according to claim 2 , further comprising: The alarm system according to any one of claims 1 to 3, wherein a failure that occurs in the acoustic alarm line and the optical alarm line is at least one of a short circuit and a disconnection. The controller is
A third relay circuit for switching between an operation state for detecting occurrence of a line fault in the light alarm line and an operation state for causing the light alarm device to emit light;
  A third relay driving unit that operates the third relay circuit so that the light alarm device emits light when the second state signal is received;
The alarm system according to any one of claims 1 to 4, further comprising:

Images