JP7152203B2 - disaster prevention system - Google Patents

Description

The present invention relates to a disaster prevention system.

Conventionally, there have been known a plurality of optical alarm devices that emit light to issue an alarm (see Patent Document 1, for example). The plurality of light alarms disclosed in Patent Document 1 are configured to emit light in synchronization with each other from the viewpoint of preventing the user from suffering from photosensitive epilepsy or the like.

JP 2016-200847 A

By the way, in the light alarm, the light emission is controlled by the light control device, but when installing a large number of light alarms, it is necessary to use a plurality of light control devices. In order to synchronize with each other, it was necessary to synchronize a plurality of light control devices with each other.

As a technique for synchronizing a plurality of light control devices with each other, for example, after fixing one of the plurality of light control devices as a master and fixing the other light control devices as slaves, A method of synchronizing by outputting a synchronization signal from the master to the slave has been known. Also, for example, a method of synchronizing by outputting a synchronization signal from a disaster prevention receiver to each optical control device has been known.

However, with regard to the method of fixing the master and the slave, for example, if the light control device fixed to the master cannot output the synchronization signal for some reason, it becomes only the slave, resulting in a plurality of light control devices. There was a possibility that it would not be possible to maintain synchronization between As for the method of outputting the synchronization signal from the disaster prevention receiver, for example, since it is necessary to incorporate a function to output the synchronization signal to the disaster prevention receiver, the modification cost of the disaster prevention receiver increases. The cost of synchronizing the light controllers with each other could increase.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a plurality of light control devices capable of maintaining synchronization with each other at low cost.

In order to solve the above-mentioned problems and achieve the object, the disaster prevention system according to claim 1 is a plurality of light control devices for controlling light emission of light alarms, At least one light control device operates as a master light control device that is a synchronization source light control device, and at least one light control device other than the master light control device among the plurality of light control devices is the master light control device. A disaster prevention system comprising the plurality of light control devices operating as slave light control devices that are synchronization destination light control devices with respect to an apparatus, wherein the plurality of light control devices operate as master light control devices based on received electrical signals. selection means for selecting whether to operate as a control device or as a slave light control device; and to operate as the master light control device or the slave light control device based on the selection result of the selection means. wherein the selection means operates as the master light control device when receiving an activation signal for starting an optical warning operation in which the light warning is emitted by the light warning device. When operating as the master light control device, the operation control means generates a synchronizing signal and transmits it to the other light control devices.

The disaster prevention system according to claim 2 is the disaster prevention system according to claim 1, wherein the plurality of light control devices are electrically connected from the upstream side to the downstream side, and the plurality of light control devices are electrically connected from the upstream side to the downstream side. The synchronization signal can be transmitted from the upstream optical control device side to the downstream optical control device side, and the plurality of optical control devices transmit the activation signal and the synchronization signal. The signal can be received as the electric signal, and when the operation control means operates as the master light control device, the operation control means generates the synchronization signal and transmits it to the downstream side for operation.

The disaster prevention system according to claim 3 is the disaster prevention system according to claim 2, wherein when the plurality of light control devices receive the synchronization signal regardless of whether the light alarm is being operated, The received synchronization signal is transmitted downstream.

A disaster prevention system according to claim 4 is the disaster prevention system according to claim 2 or 3, wherein the selection means operates as the master light control device when the synchronization signal is received during the light alarm operation. Alternatively, it is selected to operate as the slave light control device, and the operation control means operates in synchronization with the received synchronization signal when operating as the slave light control device.

In the disaster prevention system according to claim 5, in the disaster prevention system according to claim 4, when the selection means operates as the slave light control device, the synchronization signal is output during a predetermined period of time. If not, it chooses to operate as the master light control device instead of operating as the slave light control device.

A disaster prevention system according to claim 6 is the disaster prevention system according to any one of claims 2 to 5, wherein at least some of the plurality of light control devices transmit the synchronization signal received from the upstream side to the downstream side. and switching means that make it possible to stop the ability to transmit to the

The disaster prevention system according to claim 7 is the disaster prevention system according to any one of claims 1 to 6, wherein at least some of the plurality of light control devices determine whether the light warning is in operation. an alarm operation indicator light that indicates

The disaster prevention system according to claim 8 is the disaster prevention system according to any one of claims 1 to 7, wherein at least some of the plurality of light control devices operate as the master light control device or the and an operational indicator light to indicate whether it is operating as a slave light control device.

The disaster prevention system according to claim 9 comprises a plurality of light control devices for controlling light emission of light alarms, wherein at least one light control device among the plurality of light control devices is a synchronization source light control device. A slave light control device that operates as a certain master light control device, and at least one light control device other than the master light control device among the plurality of light control devices is a light control device that is a synchronization destination with respect to the master light control device. wherein the plurality of light control devices operate as the master light control device or act as the slave light control device based on the received electrical signals. selection means for selecting whether to perform an operation; and operation control means for performing operation as the master light control device or the slave light control device based on the selection result of the selection means; At least one light control device in the device has a test function for testing the light alarm and a test operation means for controlling the test function, the test operation means for controlling the test operation. A single test, which is a test of the operation of one or more of the light alarms connected to the at least one light control device operated means, and the at least one light control device operated by the test operation means A test performed by operating the master light control device and operating light control devices other than the at least one light control device among the plurality of light control devices as slave control devices, wherein the plurality of and a composite test, which is a test of the operation of the light alarm connected to the light control device of the above.

According to the disaster prevention system of claim 1, by selecting whether to operate as a master light control device or to operate as a slave light control device, for example, one light control device can be changed to a master light control device or a slave light control device. Since it can be operated as a slave light control device, even if a light control device operating as a master light control device among a plurality of light control devices fails, the other light control devices can be operated from the slave light control device as the master light control device. It can be used by switching to the light control device, and it becomes possible to maintain synchronization between the light control devices. Further, for example, since modification of the disaster prevention receiver or the like is not required, it is possible to achieve cost reduction compared to the case where modification of the disaster prevention receiver or the like is required.

According to the disaster prevention system of claim 2, the light control device that receives the activation signal operates as the master light control device, so that, for example, not only the most upstream light control device among the plurality of light control devices , the synchronizing signal can be output from any optical control device. Further, for example, in the case of synchronizing with the synchronizing signal from the most upstream light control device, the light alarm is not immediately performed unless the timing of light emission when the start signal is input, but the master light control is performed after the start signal is input. By operating it as a device, it becomes possible to give an optical alarm without waiting for the timing of the optical alarm by the synchronizing signal. Further, for example, it is possible to generate a synchronization signal when causing the optical alarm device to issue an optical alarm without outputting the synchronization signal all the time. This makes it possible to reduce the power consumption when the optical alarm is not issued. Further, when the light alarm can be operated by the power supplied by the activation signal, it is possible to operate synchronously by the power from the activation signal.

According to the disaster prevention system of claim 3, by transmitting the synchronization signal received by the optical control device that received the synchronization signal to the downstream side, for example, a plurality of optical control devices can be synchronized with the same synchronization signal. becomes possible.

According to the disaster prevention system of claim 4, for example, when an optical control device that receives a synchronizing signal operates in synchronization with the synchronizing signal during an optical alarm operation, the plurality of optical control devices Synchronized light alarm operation can be performed. Further, for example, when a disconnection occurs between the optical control devices, the optical control device at the highest level among the optical control devices below the disconnection point and having received the start signal is the master control device. It becomes a device, and the other light control devices become slave light control devices, so that it is possible to maintain a synchronous state except for the disconnection point.

According to the disaster prevention system of claim 5, for example, even if a disconnection occurs between the optical alarm devices during the optical alarm operation, it is possible to detect the disconnection by not receiving the synchronization signal. As a result, among the light control devices below the point where the disconnection occurs and which have received the activation signal, the light control device at the highest level becomes the master control device, and the other light control devices become slave light control devices. As a result, even if a disconnection occurs during the optical alarm operation, it is possible to maintain the synchronous state other than the disconnection point.

According to the disaster prevention system of claim 6, for example, when a disconnection occurs, the optical control devices may be connected in a loop so that the synchronization state between the optical control devices is not interrupted. When the devices are connected in a loop, the loop of the synchronization signal causes the device to become a slave light control device by receiving its own synchronization signal, which may interrupt the output of the synchronization signal. On the other hand, as in the present application, by having a switching unit that is set to stop the function of transmitting the synchronizing signal to the downstream side, the switching unit of any of the optical control devices is controlled when the line is not broken. Thus, by stopping the function of transmitting the synchronization signal to the downstream side, it is possible to prevent a transmission loop. Further, for example, when a disconnection occurs, switching the switching unit enables the synchronization signal to be transmitted to the downstream side, so that the synchronization state of the entire system can be maintained.

According to the disaster prevention system of claim 7, for example, even if the light control device and the light alarm cannot be confirmed with one eye, it is possible to confirm whether the light alarm is operating by checking the light control device. It becomes possible.

According to the disaster prevention system of claim 8, for example, conventionally, it was difficult to visually confirm whether or not a plurality of light alarms are synchronized based on the synchronization signal, but the deviation of light emission is There is a possibility of causing an epileptic disorder, and there have been requests for confirmation, but according to the present application, it is possible to confirm whether the light control devices are functionally synchronized, and whether the light alarms of the entire disaster prevention system are synchronized. can be confirmed by checking the light control device.

According to the disaster prevention system of claim 9, by selecting whether to operate as a master light control device or to operate as a slave light control device, for example, one light control device can be changed to a master light control device or a slave light control device. Since it can be operated as a slave light control device, even if a light control device operating as a master light control device among a plurality of light control devices fails, the other light control devices can be operated from the slave light control device as the master light control device. It can be used by switching to the light control device, and it becomes possible to maintain synchronization between the light control devices. Further, for example, since modification of the disaster prevention receiver or the like is not required, it is possible to achieve cost reduction compared to the case where modification of the disaster prevention receiver or the like is required.
Further, for example, it is conceivable that the light control device receives the activation signal at the same time as other equipment of the disaster prevention system, such as receiving the activation signal via a bell wire. Also, the test can be performed without operating other equipment of the disaster prevention system.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view which shows the optical warning system which concerns on this Embodiment. It is a block diagram showing a light control device. 4 is a flowchart of light emission control processing; It is a figure which shows another light control apparatus. It is a figure which shows the connection example of another light control apparatus.

EMBODIMENT OF THE INVENTION Below, embodiment of the disaster prevention system which concerns on this invention is described in detail based on drawing. In addition, this invention is not limited by this embodiment.

[Basic concept of the embodiment]
First, the basic concept of the embodiment will be explained. Embodiments generally relate to disaster prevention systems.

Here, the "disaster prevention system" is a system provided with a plurality of light control devices.

In addition, "plurality of light control devices" means a plurality of devices that control the light emission of the light alarm, and at least one device among the plurality of devices is a master light control device that is a synchronization source light control device. At least one light control device other than the master light control device among the plurality of devices operates as a slave light control device that is a synchronization destination light control device with respect to the master light control device. Each of the plurality of light control devices can operate as a master light control device, or can operate as a slave light control device.

Further, the "plurality of light control devices" are, for example, electrically connected from the upstream side to the downstream side in accordance with the order of priority. It is a device that transmits a synchronizing signal to the side of the optical control device on the side, and also includes a device that can receive the activation signal or the synchronizing signal as an electrical signal. means and motion control means.

An "optical alarm" is a device that issues a warning by outputting light, and more specifically, a device that issues a warning by outputting a flash of light. A "master light control device" is a device that serves as a synchronization source among a plurality of light control devices in a disaster prevention system, and is, for example, one light control device among a plurality of light control devices. A "slave light control device" is a device that becomes a synchronization destination among a plurality of light control devices in a disaster prevention system. be.

In addition, "synchronization" means that a plurality of light control devices operate at the same timing. , flashing), etc. Further, a "synchronization source device" is a device that synchronizes with another device, and a "synchronization destination device" is a device that is synchronized by another device.

"Priority" is the order set in a plurality of light control devices, specifically the order related to operation as a master light control device. For example, the priority is relatively high. It is a concept specifying that the more light control devices operate as the master light control device. This is the order set by a command to the light control device.

An "electrical signal" is an electrical signal received by the light control device, such as a high-level or low-level on/off signal, a signal transmitting a command according to a predetermined protocol, or light emission timing or synchronization timing. It is a concept that includes a signal including a pulse that defines arbitrary timing such as, for example, a concept that includes a start signal, a synchronization signal, and the like. A "start signal" is a signal for performing an optical alarm operation (for example, starting an optical alarm operation). It is a signal to operate, for example, a signal transmitted from an arbitrary device (for example, a disaster prevention receiver, etc.) to the light control device. This is the signal that the receiver sends to the light controller. "Light alarm operation" is an operation to issue an alarm by emitting light from the light alarm, and includes, for example, an operation to cause the light alarm to emit light by any means such as sending a pulse signal to the light alarm. It is a concept. A "synchronization signal" is a signal for synchronizing a plurality of light control devices. Specifically, it is a signal for synchronizing a master light control device and a slave light control device, or a signal for synchronizing slave light control devices. .

The "selection means" is means for selecting whether to operate as a master light control device or as a slave light control device based on the received electrical signal. or based on the reception state of the activation signal and the synchronizing signal as electric signals. means for selecting whether to operate as a master light control device or as a slave light control device based on the order of priority set therein. is selected to operate as a master light control device when receiving a signal, and to select to operate as a slave light control device when receiving an activation signal or a synchronization signal out of a start signal or a synchronization signal. be. That is, for example, when the light control device to which the self belongs first receives the activation signal, the "selection means" selects to operate as the master light control device, and then the light control device receives the synchronization signal. is received, it selects to operate as a slave light control device instead of operating as a master light control device. means for selecting to operate as a master light control device instead of operating as a slave light control device when no further synchronization signals are received during the period of It is a concept that includes

Further, "operation control means" means means for operating as a master light control device or a slave light control device based on the selection result of the selection means. It is a means for operating in synchronization with the received synchronizing signal when generating a synchronizing signal and transmitting it to the downstream side to operate as a slave light control device.

In the following embodiments, an example will be described in which the "priority order" of a plurality of light control devices is set based on the state of electrical connection between the plurality of light control devices. Also, the number of "light control devices" is arbitrary as long as it is two or more, but in the following embodiments, the case where the number of light control devices is three will be described as an example.

[Specific contents of the embodiment]
Next, specific contents of the embodiment will be described.

(Constitution)
First, the configuration of the optical warning system according to this embodiment will be described. FIG. 1 is an overall view showing an optical warning system according to this embodiment.

The optical alarm system 900 of FIG. 1 is a disaster prevention system, and includes a plurality of optical alarms 1 and three optical control devices 2. FIG. It should be noted that the three light control devices 2 are configured in the same manner, and will be generically referred to as the light control device 2 unless they need to be distinguished from each other (the light alarm 1 is also referred to as the light control device 2). the same).

(Configuration - light alarm)
The light alarm device 1 is alarm means that emits light to give an alarm. The specific type and configuration of this light alarm 1 are arbitrary, but for example, it can be configured using a known light emitting means that emits light by outputting flash light, which is a flash light. shall be located on the same floor as

(Configuration - light control device)
The light control device 2 is light emission control means for controlling light emission of the light alarm device 1 . FIG. 2 is a block diagram showing the light control device. Although the specific type and configuration of the light control device 2 are arbitrary, for example, a light control device 201 that controls light emission of the light alarm device 101, a light control device 202 that controls light emission of the light alarm device 102, and a light control device 202 that controls light emission of the light alarm device 102 A light control device 203 for controlling light emission of the alarm device 103 is provided, and each light control device 2 is provided with the input/output unit 21 and the control unit 22 shown in FIG.

(Configuration - light control device - input/output unit)
The input/output unit 21 is input/output means for inputting and/or outputting electric signals. The specific type and configuration of the input/output unit 21 are arbitrary, but for example, it includes a start signal input terminal T1, a control synchronization signal input terminal T2, a control synchronization signal output terminal T3, and a light emission synchronization signal output terminal T4.

(Configuration - light control device - each terminal)
The activation signal input terminal T1 is input means for inputting the aforementioned activation signal, and is a terminal electrically connected to a disaster prevention receiver (not shown), for example. The control synchronizing signal input terminal T2 is input means for receiving a control synchronizing signal. For example, the control synchronizing signal output terminal T3 of another light control device 2 is electrically connected as appropriate. The control synchronizing signal output terminal T3 is output means for outputting a control synchronizing signal, and is a terminal to which the control synchronizing signal input terminal T2 of another light control device 2 is appropriately electrically connected. The light emission synchronizing signal output terminal T4 is output means for outputting a light emission synchronizing signal, and is a terminal to which the light alarm 1 is electrically connected, for example. The "control synchronizing signal" is the aforementioned synchronizing signal, for example, a signal containing pulses. The "light emission synchronizing signal" is a signal for operating the light alarm device 1 to emit light, and a known signal for operating the light alarm device 1 can be applied. Note that the operation of outputting this light emission synchronization signal corresponds to the aforementioned "light alarm operation".

The light control devices 201 to 203 are electrically connected to each other through the control synchronizing signal input terminal T2 and the control synchronizing signal output terminal T3. will be connected to For example, the light control devices 201 to 203 are electrically connected as shown in FIG. 2 so that the priority is set in order from the highest to the lowest priority. A case of connection will be described as an example. That is, the case where the light control device 201 is on the upstream side and the light control device 203 is on the downstream side will be described as an example.

(Configuration - light control device - control unit)
The control unit 22 is control means for controlling the light control device 2. Specifically, the control unit 22 includes a CPU, various programs interpreted and executed on the CPU (a basic control program such as an OS, and a specified program started on the OS). (including application programs that implement functions), and an internal memory such as a RAM for storing programs and various data. In particular, the program according to the embodiment substantially configures each section of the control section 22 by being installed in the light control device 2 via any recording medium or network.

Functionally, the control unit 22 includes, for example, a selection unit 221 and an operation control unit 222 . The selection unit 221 is selection means for selecting whether to operate as a master light control device or as a slave light control device based on the received electrical signal. The operation control unit 222 is operation control means that operates as a master light control device or a slave light control device based on the selection result of the selection unit 221 . Specific processing performed by each section of the control section 22 will be described later.

(process)
Next, light emission control processing executed by the light warning system 900 configured in this manner will be described. FIG. 3 is a flowchart of light emission control processing (steps are abbreviated as “S” in the description of each process below). Specifically, it is a process of selecting the operation mode of the light control device 2 and causing the light alarms 1 to emit light in synchronization with each other. The timing of executing this light emission control process is arbitrary, but for example, when the power of each device of the light alarm system 900 is turned on, the execution is started repeatedly. do.

The "operation mode" is a mode for operating the light control device 2, and is a concept including, for example, a master light control mode, a slave light control mode, a light non-control mode, and the like. The "master light control mode" is a mode in which the master light control device operates. Specifically, the light control device 2 generates a control synchronization signal and emits light in synchronization with the generated control synchronization signal. This is a mode for outputting a signal and a mode for outputting a generated control synchronization signal. The "slave light control mode" is a mode in which the light control device operates as a slave light control device. This is a mode for outputting a signal and a mode for relaying a received control synchronization signal. "Light non-control mode" is a mode in which the master light control device and the slave light control device do not operate. is a mode for relaying the received control synchronization signal.

In the following description, it is assumed that the operation mode of the light control device 2 is in the "non-light control mode" especially when the power of each device of the light alarm system 900 is turned on. A specific operation in this "light non-control mode" will be described later.

At SA1 in FIG. 3, the selection unit 221 determines whether or not the activation signal is received. Specifically, it is arbitrary, but, for example, the start signal is assumed to be a high level (5V, etc.) constant level signal, and the start signal input to the start signal input terminal T1 is monitored and determined. If a high-level activation signal is not input to the activation signal input terminal T1, it is determined that the activation signal has not been received (NO at SA1), and the process is terminated. Also, when a high-level start signal is input to the start signal input terminal T1, it is determined that the start signal has been received (YES in SA1), and the process proceeds to SA2.

At SA2 in FIG. 3, the selector 221 selects the master light control mode (that is, selects to operate as a master light control device). Thereafter, the operation control section 222 of the light control device 2 that has selected the master light control mode operates as the master light control device. Specifically, the operation control unit 222 generates a control synchronization signal, outputs the generated control synchronization signal via the control synchronization signal output terminal T3, and emits light in synchronization with the generated control synchronization signal. The synchronization signal is controlled to be output via the light emission synchronization signal output terminal T4 (that is, the light alarm operation is performed).

At SA3 in FIG. 3, the selection unit 221 determines whether or not the control synchronization signal has been received. Specifically, it is arbitrary, but for example, the control synchronization signal is a momentary interruption pulse signal (that is, it is normally high level (5 V, etc.), momentarily changes to low level (0 V, etc.), and then returns to high level (5 V, etc.). ), and is determined by monitoring the control synchronizing signal input to the control synchronizing signal input terminal T2. If no new control synchronization signal, which is a momentary interruption pulse signal, is input to the control synchronization signal input terminal T2 during the predetermined period of time, it is determined that the control synchronization signal has not been received (SA3). NO), the process ends. Further, when a control synchronization signal, which is a momentary interruption pulse signal, is newly input to the control synchronization signal input terminal T2 during the predetermined period of time, it is determined that the control synchronization signal has been received (YES in SA3), Move to SA4.

Note that the “predetermined period of time” is a predetermined period of time, for example, an arbitrary period of time such as 3 seconds to 5 seconds. Note that the timing of the start point of this predetermined time period can be arbitrarily interpreted. The timing at which the signal was most recently determined to have been received may be interpreted as the timing of the starting point, or the time corresponding to the "predetermined time period" (i.e., 3 seconds to 5 seconds, etc.) , the timing of starting to determine whether or not the control synchronization signal has been received (that is, the timing of starting the execution of SA3, for example) may be interpreted as the timing of the beginning of the period of time.

At SA4 in FIG. 3, the selector 221 selects the slave light control mode (that is, selects to operate as a slave light control device). Thereafter, the operation control section 222 of the light control device 2 that has selected the slave light control mode operates as a slave light control device. Specifically, the operation control unit 222 outputs (relays) the control synchronization signal received via the control synchronization signal input terminal T2 via the control synchronization signal output terminal T3, and also outputs (relays) the control synchronization signal received via the control synchronization signal input terminal T2. A light emission synchronization signal is synchronously output via the light emission synchronization signal output terminal T4 (that is, an optical alarm operation is performed).

At SA5 in FIG. 3, the selection unit 221 determines whether or not the control synchronization signal has been received. Specifically, although it is arbitrary, for example, the same processing as in SA3 is performed. If the control synchronizing signal, which is the instantaneous interruption pulse signal, is not newly input to the input terminal T2, it is determined that the control synchronizing signal has not been received (NO in SA5), and the process proceeds to SA1. Further, when a control synchronization signal, which is a momentary interruption pulse signal, is newly input to the control synchronization signal input terminal T2 during the predetermined period of time, it is determined that the control synchronization signal has been received (YES in SA5), Move to SA6.

At SA6 in FIG. 3, the selection unit 221 determines whether or not the activation signal is received. Specifically, although it is arbitrary, for example, the same processing as in SA1 is performed, but if a high-level start signal is not input to the start signal input terminal T1, it is determined that the start signal has not been received. (NO in SA6) and proceed to SA7. Further, when a high-level start signal is input to the start signal input terminal T1, it is determined that the start signal is received (YES in SA6), and the process proceeds to SA5.

At SA7 in FIG. 3, the selection unit 221 selects the light non-control mode. Thereafter, the operation control section 222 of the light control device 2 that has selected the light non-control mode performs operations other than those of the master light control device and the slave light control device. Specifically, when the light emission synchronization signal is not output and the control synchronization signal is received via the control synchronization signal input terminal T2, the received control synchronization signal is output (relayed) via the control synchronization signal output terminal T3. ). This completes the light emission control process. In the light emission control process which is repeatedly performed, SA2, SA4, and SA7 are repeatedly performed. do.

(motion)
Next, the operation of the optical warning system 900 configured as described above will be described. Specifically, when the disaster prevention receiver detects the occurrence of a fire, it outputs a start signal, and the operation when the start signal is input to all of the light control devices 201 to 203 (hereinafter referred to as the first case). operation), operation when disconnection occurs between the light control device 201 and the light control device 202 after the first operation (hereinafter referred to as the second operation), and regardless of the first and second operations, The operation when the activation signal is input only to the light control devices 201 and 203 (hereinafter referred to as operation in the third case) will be described.

(Action - Action in the first case)
When the disaster prevention receiver detects the occurrence of a fire, it outputs a start signal, and when the start signal is input to all of the light control devices 201 to 203, the light control devices 201 to 203 respond with YES in SA1 of FIG. After that, at SA2, the master light control mode is selected and the mode is operated. Specifically, a control synchronization signal is generated, the generated control synchronization signal is output via a control synchronization signal output terminal T3, and a light emission synchronization signal is generated in synchronization with the generated control synchronization signal. The signal is controlled to be output via the signal output terminal T4. In this case, since the light control devices 201 to 203 each output the light emission synchronization signal asynchronously, the light alarms 101 to 103 start blinking asynchronously with each other.

After that, since the light control device 201 is the most upstream and has not received the control synchronization signal, it terminates after processing NO at SA3 in FIG. 3 and processes YES at SA1, SA2 and NO at SA3 is repeated, the processing in the master light control mode is continued. On the other hand, since the light control device 202 receives the control synchronization signal from the light control device 201, after YES at SA3 in FIG. 3, it selects the slave light control mode at SA4 and operates in this mode. Specifically, the control synchronization signal received via the control synchronization signal input terminal T2 is output (relayed) via the control synchronization signal output terminal T3 (after finishing generating the control synchronization signal by itself). Also, in synchronization with the received control synchronizing signal, the light emission synchronizing signal is controlled to be output via the light emission synchronizing signal output terminal T4. On the other hand, since the light control device 203 receives the control synchronization signal from the light control device 202 , it controls similarly to the light control device 202 . These optical control devices 202 and 203 continue until it is determined that the control synchronization signal has not been received (NO at SA5) or until it is determined that the activation signal has not been received (NO at SA6). , continue processing in the slave light control mode. In this case, the light controllers 201 to 203 output light emission synchronization signals in synchronization with each other according to the control synchronization signal from the light controller 201, so that the light alarms 101 to 103 blink in synchronization with each other. become.

(Action - action in the second case)
If a disconnection occurs between the light control device 201 and the light control device 202 after the first operation, the light control device 201 repeats the processing of YES in SA1, NO in SA2, and SA3 in FIG. , continue processing in the master light control mode.

On the other hand, the light control device 202 repeats YES in SA5 and YES in SA6 to continue processing in the slave light control mode until disconnection occurs between the light control devices 201 and 202. Since the control synchronization signal from the light control device 201 is not input due to the disconnection, the master light control mode is selected at SA2 after NO at SA5 and YES at SA1, and the mode is operated. Specifically, a control synchronization signal is generated, the generated control synchronization signal is output via a control synchronization signal output terminal T3, and a light emission synchronization signal is generated in synchronization with the generated control synchronization signal. The signal is controlled to be output via the signal output terminal T4. On the other hand, the light control device 203 receives the control synchronization signal generated by the light control device 201 before the disconnection, and receives the control synchronization signal generated by the light control device 202 after the disconnection. YES of SA6 is repeated to continue processing in the slave light control mode. In this case, although the optical alarm devices 102 and 103 blink asynchronously with respect to the optical alarm device 101, the optical alarm devices 102 and 103 blink in synchronization with each other.

(Action-Action in the third case)
When the disaster prevention receiver detects the occurrence of a fire and outputs a start signal, and the start signal is input only to the light control devices 201 and 203, the light control devices 201 and 202 operate in the same manner as in the first case. Similarly, after NO at SA1 in FIG. 3, the master light control mode is selected at SA2 and the mode is operated. In this case, the light alarms 101 and 103 start blinking asynchronously with each other. On the other hand, the light control device 202 performs the operation in the light non-control mode because the processing of SA1 is NO.

After that, since the light control device 201 is the most upstream device and has not received the control synchronization signal, it continues the processing in the master light control mode after the NO processing of SA3 in FIG. On the other hand, the light control device 202 receives the control synchronization signal from the light control device 201, but does not output the emission synchronization signal, and outputs the received control synchronization signal via the control synchronization signal output terminal T3. Control to (relay). On the other hand, since the light control device 203 receives the control synchronization signal from the light control device 202, it operates in the slave light control mode. In this case, the optical alarms 101 and 103 flash in synchronization with each other, while the optical alarm 102 does not flash.

(Effect of Embodiment)
As described above, according to the present embodiment, by selecting whether to operate as a master light control device or to operate as a slave light control device, one light control device 2 can be used as a master light control device or a slave light control device. Since it can be operated as a slave light control device, even if the light control device 2 operating as a master light control device among the plurality of light control devices 2 fails, the other light control devices 2 can be operated as slave light control devices. It is possible to switch from the device to the master light control device for use, and it is possible to maintain synchronization between the light control devices 2 . Further, for example, since modification of the disaster prevention receiver or the like is not required, it is possible to achieve cost reduction compared to the case where modification of the disaster prevention receiver or the like is required.

Further, by operating the light control device 2 that has received the activation signal as the master light control device, for example, not only the light control device 2 at the most upstream of the plurality of light control devices 2 but also any light control device 2 It is possible to output a control synchronizing signal from. Further, for example, in the case of synchronizing with a control synchronizing signal from the most upstream light control device 2, when the start signal is input, if it is not the light emission timing, the light alarm immediately (processing to light the light alarm device 1). However, by operating it as a master light control device after the start signal is input, it is possible to give a light warning without waiting for the timing of the light warning by the control synchronizing signal. Further, for example, it becomes possible to generate a control synchronization signal when causing the light alarm device 1 to give an optical warning without outputting the control synchronization signal all the time. This makes it possible to reduce the power consumption when the optical alarm is not issued. Further, when the optical alarm device 1 can be operated by the power supply by the activation signal, it is possible to perform the synchronous operation by the power from the activation signal.

Further, by transmitting the control synchronization signal received by the optical control device 2 that has received the control synchronization signal to the downstream side, for example, a plurality of optical control devices 2 can be synchronized with the same control synchronization signal.

Further, for example, when the optical control device 2 receives the control synchronization signal while the optical alarm operation is being performed, the optical control device 2 operates in synchronization with the control synchronization signal, so that the plurality of optical control devices 2 can perform the optical alarm operation in synchronization. It is possible to do it. Further, for example, when a disconnection occurs between the light control devices 2, the light control device 2 at the highest order among the light control devices 2 below the disconnection occurrence point and having received the start signal. 2 becomes the master control device and the other light control devices 2 become slave light control devices.

Further, for example, even if a wire breakage occurs between the optical alarm devices 1 during the optical alarm operation, the wire breakage can be detected by not receiving the control synchronization signal. As a result, among the light control devices 2 below the location of the disconnection that have received the activation signal, the top light control device 2 becomes the master control device, and the other light control devices 2 become the slave light control devices. By becoming a control device, even if a disconnection occurs during the light alarm operation, it is possible to maintain a synchronous state other than the disconnection point.

[Modification to Embodiment]
Although the embodiments according to the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical ideas of each invention described in the claims. can be done. Such modifications will be described below.

(Problem to be solved and effect of invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the contents described above, and may differ depending on the details of the implementation environment and configuration of the invention. or only part of the effects described above.

(Regarding decentralization and integration)
Moreover, the configuration described above is functionally conceptual, and does not necessarily have to be physically configured as illustrated. That is, the specific form of distribution or integration of each part is not limited to the illustrated one, and all or part of them can be functionally or physically distributed or integrated in arbitrary units. In addition, the term "device" in the present application is not limited to one configured by a single device, but includes one configured by a plurality of devices.

(Regarding electrical signals)
In addition, after adopting a signal for transmitting a command according to a predetermined protocol as the "electrical signal", information specifying the light control device 2 to operate as the master light control device or the slave light control device is included in the activation signal. By inputting a signal, each light control device 2 may be operated based on the information contained in the activation signal. In this case, all the optical control devices 2 may be configured to be able to transmit and receive control synchronization signals, and then operate as described above.

(Regarding the control synchronization signal)
Further, the control synchronizing signal in the above embodiment may be configured to be output by the light control device 2 at an arbitrary timing before receiving the activation signal.

(Regarding loop connection (Part 1))
Also, a plurality of light control devices 2 may be connected in a ring so as to form a loop with each other. may When a termination is provided in the light control device 2, switching means (such as a changeover switch) for switching between electrically connecting the termination to the loop connection and electrically disconnecting the termination. may be provided.

(Regarding loop connection (Part 2))
FIG. 4 is a diagram showing another light control device, and FIG. 5 is a diagram showing a connection example of another light control device. The light control device 3 shown in FIG. 4 is provided with a switching section 31 in addition to the light control device 2 shown in FIGS. be. 5, illustration of the switching unit 31 in FIG. 4 is omitted for convenience of explanation.

The switching unit 31 of the light control device 3 is the above-described switching means, and electrically connects the control synchronizing signal input terminal T2 and the control synchronizing signal output terminal T3 (hereinafter, referred to as the first connection state) to enable control. The synchronous signal transmission function is enabled, or the control synchronous signal input terminal T2 and the terminating resistor are electrically connected (hereinafter referred to as the second connection state) (that is, the control synchronous signal input terminal T2 and the control synchronous signal By electrically disconnecting the output terminal T3, the transmission function of the control synchronization signal is disabled (stopped). Such electrical connection and disconnection can be realized by controlling the segment of the switching unit 31. This segment control is configured to be automatically performed by a control unit (not shown) of the light control device 3. Alternatively, by providing a DIP switch or the like, it can be configured to be manually operated by the user. Here, for example, a case of realizing a combination of the two will be described as an example.

For example, the light control device 3 in FIG. 4 is connected in a loop like the light control devices 301 to 305 in FIG. The devices 301 to 304 are placed in the first connected state, and the light control device 305 is placed in the second connected state. In this case, the control synchronizing signal input terminal T2 and the control synchronizing signal output terminal T3 of the light control device 305 are electrically cut off from each other. When operating in this state, for example, when a start signal is input to the light control devices 301 to 305, the light control device 301 operates as a master light control device, and the light control devices 302 to 305 operate as slave light control devices. become. After that, when the line between the light control device 303 and the light control device 304 is disconnected, the control unit of the light control device 305 uses an arbitrary method (for example, each light control device 3 monitors the voltage of each terminal, If there is a change in voltage, a method of notifying other light control devices 3, a method of detecting disconnection by itself, or a method of detecting disconnection when the control synchronization signal is no longer received) is used. is detected, and the switching unit 31 is controlled to enter the first connection state. In this case, the control synchronizing signal input terminal T2 and the control synchronizing signal output terminal T3 of the light control device 305 are electrically connected to each other. The light control device 304, which is currently the most upstream, operates as a master light control device, while the light control devices 301 to 303 and 305 operate as slave light control devices. In such a configuration, for example, when a disconnection occurs, the light control devices 3 may be connected in a loop so that the synchronization state between the light control devices 3 is not interrupted. In the case of a looped connection, the loop of the control synchronization signal causes the device to become a slave optical control device by receiving its own control synchronization signal, and there is a risk that the output of the synchronization signal will be interrupted. On the other hand, as in the present application, by having the switching unit 31 that is set to stop the function of transmitting the control synchronization signal to the downstream side, the switching unit of any one of the light control devices 3 31 to stop the function of transmitting the control synchronization signal to the downstream side, it is possible to prevent a transmission loop. Further, for example, when a disconnection occurs, switching the switching unit 31 enables the synchronization signal to be transmitted to the downstream side, so that the synchronization state of the entire system can be maintained.

Further, the disconnection of the control synchronization signal is detected by, for example, always outputting a high level to the control synchronization signal line, and determining that the disconnection occurs when the control synchronization signal is received at the low level for a continuous period of time. At the time of detection, the first connection state may be set by controlling the switching unit 31 .

(About indicator light)
Also, at least a part of the plurality of light control devices may be provided with an alarm operation indicator lamp for indicating whether or not the light alarm operation is in progress. Although the specific implementation method is arbitrary, for example, an alarm operation indicator lamp having an arbitrary light source is provided for all or part (that is, at least one) of the plurality of light control devices 2 of the light alarm system 900. The control unit 22 determines whether or not it is in the optical alarm operation, and controls the light emission of the alarm operation indicator lamp in order to identify whether the optical alarm operation is being performed based on the determination result. can be implemented as When configured in this way, for example, even if the light control device and the light alarm cannot be confirmed with one eye, it is possible to confirm whether or not the light alarm is operating by confirming the light control device.

Also, at least some of the plurality of light control devices may be provided with operation indicator lights indicating whether they are operating as the master light control device or as the slave light control device. Any specific implementation method may be used. Then, the control unit 22 determines whether it is operating as a master light control device or as a slave light control device. It may be implemented to control the lighting of the lamp. In the case of such a configuration, for example, although it has been difficult to visually confirm whether or not a plurality of light alarms are synchronized based on a synchronization signal, a deviation in light emission can cause epileptic disorder. However, according to the present application, it is possible to check whether the light control device is functionally synchronized, and the light control device can be used to check whether the light alarms of the entire disaster prevention system are synchronized. It can be confirmed by checking.

(About the test)
Also, at least one light control device among the plurality of light control devices may be provided with the test function and the test operation means. The "test function" is a function of testing the operation of the light alarm, for example, a function of performing a single test and a combined test. A "single test" is a test of the operation of one or more light alarms connected to at least one light control device operated by a test operating means, and a "combined test" is a test operating means. operating at least one light control device operated as a master light control device, and operating light control devices other than at least one of the plurality of light control devices as slave control devices The test to be performed is a test of the operation of a light alarm connected to a plurality of light control devices. In addition, "test operation means" means means for controlling test functions, and can be configured using, for example, one or more switches (eg, DIP switches, etc.) provided in the light control device. can. When the user operates the "test operation means", the light control device uses the test function to perform a single test, a combined test, or not to perform any test. can be configured to

Any specific implementation method may be used. After being provided in the device 2, it may be mounted so as to process as follows. Specifically, when the user operates the test control means, the control unit 22 accepts the operation, and the user performs an operation (hereinafter referred to as a first operation) to perform a single test, or a combined test is performed (hereinafter referred to as the second operation), and if the first operation is performed, the single test is selected and the single test is performed, and the second operation is performed Alternatively, a composite test may be selected and executed. In the case of such a configuration, for example, it is conceivable that the light control device receives the activation signal at the same time as other equipment of the disaster prevention system, such as receiving the activation signal via a bell line. Even in the case of , the test can be performed without operating other equipment of the disaster prevention system.

It should be noted that the processing by the functions or means described in "(Regarding the test)" may be configured to be performed only when the light control device does not receive the electrical signal described above. Alternatively, it may be configured to be performed when an electrical signal is being received. "Operating at least one light control device as a master light control device" and "operating another light control device as a slave control device" are performed using the above-described selection means or operation control means. you can go Moreover, particularly in the case of a composite test, the test signal may be configured to be output to a plurality of light control devices via a synchronizing signal line.

(About wording)
Further, "inputting" an electrical signal to the light control device 2 may be interpreted as corresponding to "receiving" the electrical signal by the light control device 2. FIG.

(About features)
Moreover, the features of the embodiment and the features of the modifications may be combined arbitrarily.

(Appendix)
The disaster prevention system of appendix 1 is a plurality of light control devices that control light emission of light alarms, wherein at least one light control device among the plurality of light control devices is a master light that is a synchronization source light control device. At least one light control device other than the master light control device among the plurality of light control devices operates as a slave light control device that is a synchronization destination light control device with respect to the master light control device. A disaster prevention system comprising the plurality of light control devices, wherein the plurality of light control devices operate as the master light control device or as the slave light control device based on the received electrical signals. and operation control means for operating as the master light control device or the slave light control device based on the selection result of the selection means.

The disaster prevention system according to appendix 2 is the disaster prevention system according to appendix 1, wherein the plurality of light control devices are electrically connected from the upstream side to the downstream side, and A synchronizing signal can be transmitted from the side light control device side to the downstream side light control device side, and the plurality of light control devices perform light alarm operation in which the light alarm device emits light to give an alarm. An activation signal for starting or the synchronization signal can be received as the electric signal, and the selection means selects to operate as the master light control device when receiving the activation signal. When operating as the master light control device, the operation control means generates the synchronization signal and transmits it to the downstream side for operation.

The disaster prevention system according to Supplementary Note 3 is the disaster prevention system according to Supplementary Note 2, wherein when the plurality of light control devices receive the synchronization signal regardless of whether the light alarm operation is being performed, the received synchronization signal Transmits the signal downstream.

The disaster prevention system according to appendix 4 is the disaster prevention system according to appendix 2 or 3, wherein the selection means operates as the master light control device when receiving the synchronization signal during the light alarm operation. , the operation control means selects to operate as the slave light control device, and the operation control means operates in synchronization with the received synchronization signal when operating as the slave light control device.

The disaster prevention system according to appendix 5 is the disaster prevention system according to appendix 4, wherein the selection means is operating as the slave light control device, and the synchronization signal is not further received during a predetermined period of time. , instead of operating as the slave light control device, it chooses to operate as the master light control device.

In the disaster prevention system according to appendix 6, in the disaster prevention system according to any one of appendices 2 to 5, at least some of the plurality of light control devices have a function of transmitting the synchronization signal received from the upstream side to the downstream side. and switching means for stopping the

In the disaster prevention system according to appendix 7, in the disaster prevention system according to any one of appendices 1 to 6, at least some of the plurality of light control devices have an alarm operation display indicating whether or not the light alarm is in operation. Equipped with lights.

The disaster prevention system according to appendix 8 is the disaster prevention system according to any one of appendices 1 to 7, wherein at least some of the plurality of light control devices operate as the master light control device or the slave light control device. and an operation indicator light to indicate whether it is operating as a

In the disaster prevention system according to appendix 9, in the disaster prevention system according to any one of appendices 1 to 8, at least one light control device among the plurality of light control devices has a test function of testing the light alarm. and test operation means for controlling the test function, the test operation means being connected to the at least one light control device operated by the test operation means. a single test that is a test of the operation of the alarm device; operating the at least one light control device operated by the test operation means as the master light control device; a composite test, which is a test performed by operating other light control devices other than one light control device as a slave control device, and is a test of the operation of light alarms connected to the plurality of light control devices; Choose one and test it.

(Effect of Supplementary Note)
According to the disaster prevention system described in Supplementary Note 1, by selecting whether to operate as a master light control device or as a slave light control device, for example, one light control device can be used as a master light control device or a slave light control device. Since it can be operated as a light control device, even if the light control device operating as the master light control device among the plurality of light control devices fails, the other light control devices can be operated from the slave light control device to the master light control device. It can be used by switching to the control device, and it becomes possible to maintain synchronization between the light control devices. Further, for example, since modification of the disaster prevention receiver or the like is not required, it is possible to achieve cost reduction compared to the case where modification of the disaster prevention receiver or the like is required.

According to the disaster prevention system described in Supplementary Note 2, the light control device that receives the activation signal operates as the master light control device. A synchronization signal can be output from any optical control device. Further, for example, in the case of synchronizing with the synchronizing signal from the most upstream light control device, the light alarm is not immediately performed unless the timing of light emission when the start signal is input, but the master light control is performed after the start signal is input. By operating it as a device, it becomes possible to give an optical alarm without waiting for the timing of the optical alarm by the synchronizing signal. Further, for example, it is possible to generate a synchronization signal when causing the optical alarm device to issue an optical alarm without outputting the synchronization signal all the time. This makes it possible to reduce the power consumption when the optical alarm is not issued. Further, when the light alarm can be operated by the power supplied by the activation signal, it is possible to operate synchronously by the power from the activation signal.

According to the disaster prevention system described in appendix 3, by transmitting the synchronization signal received by the optical control device that received the synchronization signal to the downstream side, for example, a plurality of optical control devices can be synchronized by the same synchronization signal. It becomes possible.

According to the disaster prevention system described in Supplementary Note 4, for example, a plurality of optical control devices are synchronized by operating an optical control device that receives a synchronizing signal while performing an optical alarm operation in synchronization with the synchronizing signal. It is possible to perform an optical alarm operation. Further, for example, when a disconnection occurs between the optical control devices, the optical control device at the highest level among the optical control devices below the disconnection point and having received the start signal is the master control device. It becomes a device, and the other light control devices become slave light control devices, so that it is possible to maintain a synchronous state except for the disconnection point.

According to the disaster prevention system described in Supplementary Note 5, for example, even if disconnection occurs between the optical alarm devices during optical alarm operation, it is possible to detect the disconnection by not receiving the synchronization signal. As a result, among the light control devices below the point where the disconnection occurs and which have received the activation signal, the light control device at the highest level becomes the master control device, and the other light control devices become slave light control devices. As a result, even if a disconnection occurs during the optical alarm operation, it is possible to maintain the synchronous state other than the disconnection point.

According to the disaster prevention system described in Supplementary Note 6, for example, when a disconnection occurs, the light control devices may be connected in a loop so that the synchronization state between the light control devices is not interrupted. If they are connected in a loop, the loop of the synchronization signal causes the device to become a slave light control device by receiving its own synchronization signal, which may interrupt the output of the synchronization signal. On the other hand, as in the present application, by having a switching unit that is set to stop the function of transmitting the synchronizing signal to the downstream side, the switching unit of any of the optical control devices is controlled when the line is not disconnected. Thus, by stopping the function of transmitting the synchronization signal to the downstream side, it is possible to prevent a transmission loop. Further, for example, when a disconnection occurs, switching the switching unit enables the synchronization signal to be transmitted to the downstream side, so that the synchronization state of the entire system can be maintained.

According to the disaster prevention system described in Supplementary Note 7, for example, even if the light control device and the light alarm cannot be confirmed with one eye, it is possible to confirm whether the light alarm is operating by checking the light control device. becomes.

According to the disaster prevention system described in appendix 8, for example, conventionally, although it was difficult to visually confirm whether or not a plurality of light alarms are synchronized based on the synchronization signal, the deviation of light emission is epileptic There is a possibility of causing a failure, and there was a request to check, but according to the present application, it is possible to check whether the light control device is functionally synchronized, and it is possible to check whether the light alarms of the entire disaster prevention system are synchronized. This can be confirmed by checking the light control device.

According to the disaster prevention system described in Supplementary Note 9, for example, it can be assumed that the light control device receives the activation signal at the same time as other equipment of the disaster prevention system, such as receiving the activation signal via a bell wire. Even in such an assumption, the test can be performed without operating other equipment of the disaster prevention system.

1 light alarm 2 light control device 3 light control device 21 input/output section 22 control section 31 switching section 101 light warning device 102 light warning device 103 light warning device 201 light control device 202 light control device 203 light control device 301 light control device 302 light control device 303 light control device 304 light control device 305 light control device 221 selection unit 222 operation control unit 900 light alarm system T1 start signal input terminal T2 control synchronization signal input terminal T3 control synchronization signal output terminal T4 emission synchronization signal output terminal

Claims (9)

A plurality of light control devices for controlling light emission of a light alarm, wherein at least one light control device among the plurality of light control devices operates as a master light control device that is a synchronization source light control device, and at least one of the plurality of light control devices other than the master light control device operates as a slave light control device that is a synchronization destination light control device with respect to the master light control device; A disaster prevention system comprising:
The plurality of light control devices are
selection means for selecting whether to operate as the master light control device or as the slave light control device based on the received electrical signal;
operation control means for operating as the master light control device or the slave light control device based on the selection result of the selection means ;
The selection means is
When the light alarm device receives an activation signal for starting a light alarm operation for giving an alarm by light emission,
selecting to operate as said master light controller;
When operating as the master light control device, the operation control means generates a synchronization signal and transmits it to other light control devices.
disaster prevention system. The plurality of light control devices are electrically connected from the upstream side toward the downstream side. is capable of transmitting the synchronizing signal through
The plurality of light control devices are capable of receiving the activation signal and the synchronization signal as the electrical signals ,
When the operation control means operates as the master light control device, the operation control means generates the synchronization signal and transmits it downstream for operation.
The disaster prevention system according to claim 1. When receiving the synchronization signal, the plurality of light control devices transmit the received synchronization signal downstream regardless of whether the light alarm operation is in progress.
The disaster prevention system according to claim 2. the selecting means selects to operate as the slave light control device instead of operating as the master light control device when the synchronization signal is received during the light alarm operation;
When the operation control means operates as the slave light control device, the operation control means operates in synchronization with the received synchronization signal.
The disaster prevention system according to claim 2 or 3. When the selection means does not receive the synchronization signal within a predetermined period of time while operating as the slave light control device, instead of operating as the slave light control device, the selection means choosing to operate as a master light controller;
The disaster prevention system according to claim 4. At least some of the plurality of optical controllers comprise switching means capable of stopping the function of transmitting the synchronization signal received from the upstream side to the downstream side,
The disaster prevention system according to any one of claims 2 to 5. At least some of the plurality of light control devices include an alarm operation indicator lamp that indicates whether the light alarm operation is in progress.
The disaster prevention system according to any one of claims 1 to 6. at least some of the plurality of light control devices comprise an operation indicator light indicating whether they are operating as the master light control device or as the slave light control device;
The disaster prevention system according to any one of claims 1 to 7. A plurality of light control devices for controlling light emission of a light alarm, wherein at least one light control device among the plurality of light control devices operates as a master light control device that is a synchronization source light control device, and at least one of the plurality of light control devices other than the master light control device operates as a slave light control device that is a synchronization destination light control device with respect to the master light control device; A disaster prevention system comprising:
The plurality of light control devices are
selection means for selecting whether to operate as the master light control device or as the slave light control device based on the received electrical signal;
operation control means for operating as the master light control device or the slave light control device based on the selection result of the selection means;
At least one light control device among the plurality of light control devices,
a test function for testing the light alarm;
test operating means for controlling the test function;
has
The test operation means includes:
a single test, which is a test of the operation of the one or more light alarms connected to the at least one light control device operated by the test operation means;
causing the at least one light control device operated by the test operating means to operate as the master light control device, and a light control device other than the at least one light control device among the plurality of light control devices as a slave control device, the composite test being a test of the operation of the light alarm connected to the plurality of light control devices;
Select and test one of
disaster prevention system.

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