Sequentially activated flash lamp system

Abstract

[Problem] To achieve smooth operation in a system in which work to replace conventional xenon flash lamps with LEDs has been performed. [Solution] A sequentially activated flash lamp system (20) according to the present invention is characterized by comprising a plurality of LED flash lamps (A1-An), lighting control sections (B1-Bn), communication wiring (C), a controller (F), and an operation console (G), wherein: the plurality of the lighting control sections (B1-Bn) include reception units (b11-b1n), control units (b21-b2n), and power supply units (b31-b3n), and are connected to the controller (F) and the operation console (G) by the same communication wiring (C); the control units (b21-b2n) of the lighting control sections (B1-Bn), on the basis of time conditions set for the corresponding flash lamps (A1-An) from reception of lighting signals to power-ON of the power supply units (b31-b3n), turn on the power supply units (b31-b3n); and the power supply units (b31-b3n) of the lighting control sections (B1-Bn), when turned on, activate the corresponding flash lamps (A1-An).

Description

Chained flashlight system

[0001] The present invention relates to a chained flashlight system.

[0002] The chain flashing light system, which has traditionally been used at airports in Japan, is a system in which a light-on signal is sent from the control center to each light unit, causing 29 flashing lights (hereinafter also referred to as "light units") to light up in sequence from one end of the runway to the other at approximately 17 milliseconds per light (one cycle is 0.5 seconds).

[0003] In a chain-type flashlight system, a known method for communicating from a controller to multiple flashlights is to use communication wiring to send a lighting signal from the controller to the lighting control unit of each flashlight, and then feed information back from the lighting control unit to the controller (Patent Document 1).

[0004] In the chain flashlight system shown in Patent Document 1, after the LED conversion work, which involves replacing high-intensity discharge lamps such as xenon lamps with LED lamps and replacing the controller for the xenon lamps (hereinafter also referred to as the "analog controller") with a controller for LED lamps (hereinafter also referred to as the "LED controller" or simply "controller"), when power is applied to the flashlights from the LED controller, an error is reported in the LED controller, causing the chain flashlight system to stop.

[0005] Re-table No. 2018-139017

[0006] Therefore, the present invention aims to provide a chained flashlight system in which the malfunction that occurs when turning on flashlights that use light-emitting elements such as LEDs (hereinafter also referred to as "LED flashlights") is eliminated in a chained flashlight system in which the flashlights have been converted to LED.

[0007] In order to achieve the above object, the chain flashlight system of the present invention comprises a plurality of flashlights, a plurality of lighting control units corresponding to each of the flashlights and controlling the lighting of each of the flashlights, communication wiring, a power supply unit, power supply wiring, and a controller, wherein the plurality of lighting control units comprise a receiving unit, a control unit, and a power supply unit, and are connected to the controller by the same communication wiring and are connected to the power supply unit by the same power supply wiring, the controller simultaneously transmits a lighting signal to the plurality of lighting control units via the communication wiring, the receiving unit receives the lighting signal, the control unit turns on the power of the power supply unit based on a time condition set for the corresponding flashlight from receiving the lighting signal to turning on the power of the power supply unit, and the power supply unit turns on the corresponding flashlight when powered on, and the controller transmits 1 bit of information in the lighting signal with a predetermined pulse signal width, The communication wiring is capable of two-way communication, allowing the lighting signal to be sent from the controller to the lighting control unit, and information to be fed back from the lighting control unit to the controller, and the controller waits until lighting report information from all lighting units is completed after sending the lighting signal.

[0008] According to the present invention, in a chained flashlight system in which the flashlights have been converted to LED, when power is turned on to the LED flashlights, the flashlights' abnormal alarm is resolved and they start up normally, allowing the chained flashlight system to operate smoothly immediately after the LED conversion work.

[0009] Fig. 1 is a block diagram showing the configuration of a chained flashlight system according to an embodiment of the present invention. Fig. 2 is a time chart showing the lighting of an analog controller in a conventional chained flashlight system. Fig. 3 is a time chart showing the lighting of an LED controller in the chained flashlight system according to an embodiment of the present invention.

[0010] To facilitate understanding of the present invention, an example of a chained flashlight system according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG.

[0011] The embodiment described below shows a specific example of the present invention, and therefore the arrangement, functions, and numerical values ​​of the components described in the embodiment are merely examples and should not be construed as limiting the scope of the present invention. Furthermore, components such as wiring, screws, and connectors are generally omitted from the drawings.

[0012] First, an outline of a chain flashlight system 20 (hereinafter also referred to as "system") in the embodiment will be described.

[0013] FIG. 1 is a block diagram showing the configuration of a chain flashlight system 20 according to an embodiment of the present invention.

[0014] As shown in FIG. 1, the system 20 includes a flash lamp A １ ~A ｎ , lighting control unit B １ ~B ｎ , communication wiring C, power supply unit D, power wiring E, controller F, and operation console G. １ ~B ｎ are the receiving unit b1, １ ~b1 ｎ , control unit b2 １ ~b2 ｎ , power supply unit b3 １ ~b3 ｎ and abnormality detection unit b4 １ ~b4 ｎ Flash lamp A １ ~A ｎ are the corresponding lighting control units B １ ~B ｎ and lighting control unit B １ ~B ｎ is connected to the controller F and the operation console G via a communication wiring C.

[0015] The lighting signal transmitted from the control console G through the controller F and the communication wiring C is １ ~A ｎ Lighting control unit B １ ~B ｎ and the lighting control unit B １ ~B ｎ Information is fed back from the controller F to the control console G via communication wiring C.

[0016] In the system 20, flash lamp A １ ~A ｎ In order to guide aircraft onto the runway, a flashing light A is installed at the end of the runway opposite to the approach direction of the aircraft, with the entrance end of the runway as the reference point. １ is placed at the entrance end of the runway. ｎ In Figure 1, arrow AD indicates the approach direction of the aircraft.

[0017] As shown in FIG. 1, in system 20, flash lamp A ｎ , and flash lamp A ｎ Lighting control unit B corresponding to ｎ The number of sets n is 3 when one set is defined as a flashlight A in a chain flashlight as specified by each country of the world. ｎ Specifically, the number of sets n is 2 to 30, and in Japan, the number of sets n is 29. In each set, the lighting control unit B ｎ Flash lamp A connected to ｎ The number of flash lamps is one, but multiple flash lamps may be connected. １ ~A ｎ are flash lamp A, respectively. １ ~A ｎ Address information Ia that can identify ｎ It is desirable to have the following.

[0018] In the system 20, the lighting control unit B １ ~B ｎ are the corresponding flash lamps A １ ~A ｎ Lighting control unit B controls the lighting of the １ ~B ｎ are the receiving unit b1, １ ~b1 ｎ , control unit b2 １ ~b2 ｎ , power supply unit b3 １ ~b3 ｎ and abnormality detection unit b4 １ ~b4 ｎFurthermore, the lighting control units B1 to Bn each have address information Ib ｎ It is desirable that the control unit b2 １ ~b2 ｎ However, the abnormality detection unit b4 １ ~b4 ｎ When the function of the abnormality detection unit b4 is included, １ ~b4 ｎ When it is not necessary to independently arrange the abnormality detection unit b4 １ ~b4 ｎ need not be deployed as an independent unit.

[0019] Receiving unit b1 １ ~b1 ｎ receives the lighting signal transmitted from the console G through the controller F. １ ~b1 ｎ Further, the lighting control unit B １ ~B ｎ It has a transmission function to transmit information such as the lighting signal and the flashing light abnormality signal, and functions as a transmission unit.

[0020] The lighting signal is flashing light A. １ ~A ｎ This is a signal that instructs the flash lamp A to emit a flash. １ ~A ｎ Once lit, the light will remain on, so the lighting signal is １ ~A ｎ Signals and flashing lights A regarding lighting time １ ~A ｎ The signal usually includes a light-off signal that turns off the light after a certain lighting time. The lighting time is 0.01 to 50 milliseconds.

[0021] Control unit b2 １ ~b2 ｎ is power supply unit b3 １ ~b3 ｎ That is, the control unit b2 １ ~b2 ｎ is the corresponding flash lamp A １ ~A ｎThe power supply unit b3 receives the lighting signal. １ ~b3 ｎ Based on the time conditions until the power is turned on, １ ~b3 ｎ Turn on the power.

[0022] Flashlight A １ ~A ｎ In the case where the lighting signal is １ ~A ｎ Signals regarding the lighting time of flashing lamp A １ ~A ｎ and a light-off signal that turns off the light after a predetermined lighting time, the control unit b2 １ ~b2 ｎ power supply unit b3 based on a signal relating to the lighting time or a light-off signal １ ~b3 ｎ Turn off the power.

[0023] Power supply unit b3 １ ~b3 ｎ When the power is ON, the corresponding flash lamp A １ ~A ｎ The power supply units b31 to b3n are １ ~A ｎ Any known voltage application means can be used as long as it can light the flash lamp A. １ ~A ｎ is a xenon lamp, power supply unit b3 １ ~b3n further includes flash lamp A １ ~A ｎ It is recommended to send a trigger signal to light up the power supply unit b3. １ ~b3 ｎ It is desirable that the power supply unit b3 includes a known power storage means such as a capacitor. １ ~b3 ｎ When the power is ON, the power of the storage means is supplied to the corresponding flash lamp A. １ ~A ｎ By supplying the corresponding flash lamp A １ ~A ｎ may be turned on.

[0024] Flashlight A１ ~A ｎ is flashlight A １ Flashlight A ｎ In the direction, at a predetermined interval T ｐ That is, the control unit b2 ｎ teeth 、 From receiving the lighting signal ｐ Power supply unit b3 after xn seconds ｎ It operates under the time condition of turning on the power of the specified interval T ｐ is about 17 milliseconds, but is not limited to this. １ ~B ｎ The time lag may be set in consideration of the time lag that occurs between when the light source receives the simultaneously transmitted light-up signal and when the light source receives the simultaneously transmitted light-up signal.

[0025] The chain flashlight system 20 further includes a power supply unit D and a power wiring E, and a plurality of lighting control units B １ ~B ｎ are connected to a power supply unit D by the same power wiring E. The power supply to the system may be centrally transmitted from the power supply unit D as shown in FIG. 1, but it may also be supplied from a commercial power source located at an appropriate location, not limited to one location.

[0026] In the system 20, the communication wiring C is a single communication wiring C, which is a wiring capable of two-way communication that serves as both an input communication wiring and an output communication wiring. １ ~B ｎ At the same time, it functions as a communication wiring for transmitting a lighting signal to the lighting control unit B １ ~B ｎ It functions as an output communication wiring for feeding back information from the controller F to the operation console G. When there are multiple existing communication wirings, one is used as an input communication wiring and the other is used as an input communication wiring for the lighting control unit B. １ ~B ｎ The communication wiring C may be an output communication wiring for feeding back information from the control device F to the controller F. The communication wiring C may be a communication wiring such as a metal communication cable or an optical fiber communication cable that is capable of communicating data.

[0027] Next, flash lamp A using the system 20 of this embodiment １ ~A ｎ The lighting method will be explained below.

[0028] First, when a power-on signal is sent from the console G to an electromagnetic contactor (not shown), the electromagnetic contactor turns on the flash lamp A. １ ~A ｎ At the same time, AC 200V is distributed to the controller F and AC 100V is distributed to the controller B. At the same time, lighting signals are sent from the controller F through the communication wiring C to the lighting control units B. １ ~B ｎ are simultaneously transmitted to

[0029] The controller F transmits the lighting signal once or more. When the controller F transmits the lighting signal multiple times, the controller F transmits the lighting signal at predetermined intervals T ｆ The lighting signal is repeatedly transmitted at predetermined intervals T ｆ The standard is about 500 milliseconds, but this is not limiting.

[0030] Next, the lighting control unit B １ ~B ｎ Receiving unit b1 １ ~b1 ｎ receives the lighting signal transmitted from the controller F. Then, the control unit b2 １ ~b2 ｎ The corresponding flash lamp A １ ~A ｎ The power supply unit b3 receives the lighting signal. １ ~b3 ｎ Based on the time condition until the power is turned on, power supply unit b3 １ ~b3 ｎ Turn on the power of the corresponding flash lamp A. １ ~A ｎ will light up.

[0031] To give a specific example, control unit b2 ｎ The time condition is T ｐ Power supply unit b3 after xn seconds ｎ is the time condition for turning on the power supply for a predetermined time T ｐ is about 17 milliseconds, flash lamp A １ , A２ , ..., A ｎ will light up approximately 17 milliseconds, approximately 34 milliseconds, . . . , approximately 17×n milliseconds after receiving the light-up signal, respectively.

[0032] Flashlight A １ ~A ｎ flashing light A near the entrance to the runway １ is placed near the end of the entrance. ｎ The pilot of the aircraft is to direct the flashing light A. １ ~A ｎ When looking at the aircraft, flashing lights A flash at approximately 17 millisecond intervals along the approach direction of the aircraft (arrow AD direction). １ ~A ｎ will light up in sequence.

[0033] As described above, the system 20 of this embodiment receives the lighting signal transmitted from the controller F through the operation console G and transmits it to the receiving unit b1. １ ~b1 ｎ After receiving the signal, the lighting control unit B １ ~B ｎ Control unit b2 １ ~b2 ｎ Based on the time condition, flash lamp A １ ~A ｎ The system 20 is configured to connect one of the existing communication wirings to the lighting control unit B １ ~B ｎ Therefore, it is sufficient to use one of the existing communication wirings.

[0034] Furthermore, by providing a communication line or an output line that allows two-way communication, information such as an abnormal signal, which will be described later, can be fed back to the controller F. １ ~A ｎ and lighting control unit B １ ~B ｎ This allows for monitoring of the status of the equipment, enabling maintenance to be performed at the appropriate time.

[0035] The system 20 of this embodiment has a power supply unit D and a power wiring E, and a plurality of lighting control units B １ ~B ｎis connected to a power supply unit D by a power supply wiring E. The power supply unit D is connected to the flash lamp A via the power supply wiring E. １ ~A ｎ and lighting control unit B １ ~B ｎ A general commercial power supply is usually used for the power supply unit D. The power supply wiring E can be appropriately determined based on an existing power distribution system, and examples include a single-phase two-wire system, a single-phase three-wire system, and a three-phase three-wire system.

[0036] In the system 20, the controller F further includes a plurality of lighting control units B １ ~B ｎ At the same time, a luminous intensity designation signal is sent to the lighting control unit B via the communication wiring C. １ ~B ｎ Receiving unit b1 １ ~b1 ｎ receives the luminous intensity designation signal, and the lighting control unit B １ ~B ｎ Control unit b2 １ ~b2 ｎ is power supply unit b3 １ ~b3 ｎ Flashing light A when power is on １ ~A ｎ The power supply unit b3 is connected to the power supply unit b1 so that the luminous intensity of the power supply unit b3 is set to the luminous intensity specified by the luminous intensity specifying signal. １ ~b3 ｎ The power supply of the lighting control unit B is turned on. １ ~B ｎ Power supply unit b3 １ ~b3 ｎ When the power is ON, the corresponding flash lamp A １ ~A ｎ It is desirable to light the flash lamp A at the luminous intensity designated by the luminous intensity designation signal. １ ~A ｎ The luminous intensity of the flash lamp A after power ON １ ~A ｎ This is the peak luminosity.

[0037] The luminous intensity designation signal may be a signal that designates a specific luminous intensity value, or may be a signal that designates a preset luminous intensity. The preset luminous intensity is not particularly limited, but examples include high lighting (6000 to 20000 cd), medium lighting (600 to 2000 cd), and low lighting (100 to 450 cd). In this way, when the luminous intensity designation signal is a signal that designates a preset luminous intensity, when a lighting signal is transmitted from the console G through the controller F, the flash lamp A １ ~A ｎ When a light intensity designation signal is sent from controller F, flash lamp A １ ~A ｎ may be set to flash at medium or low intensity.

[0038] In the system 20 of this embodiment, the controller F can transmit a luminous intensity designation signal, so that the flash lamp A can be set to a desired value depending on the ambient brightness, such as morning, daytime, evening, or night. １ ~A ｎ The brightness of the flashlight can be adjusted to an appropriate brightness, and the pilot of the aircraft can １ ~A ｎ This allows you to see the flashes more clearly.

[0039] In the system 20 of this embodiment, a plurality of lighting control units B １ ~B ｎ further includes an abnormality detection unit b4 １ ~b4 ｎ Abnormality detection unit b4 １ ~b4 ｎ is flashlight A １ ~A ｎ , receiving unit b1 １ ~b1 ｎ , control unit b2 １ ~b2 ｎ , power supply unit b3 １ ~b3 ｎ , and the controller F, and transmits an abnormality signal to the operation console G via the communication wiring C. １ ~b4 ｎ is flashlight A １ ~A ｎ, receiving unit b1 １ ~b1 ｎ , control unit b2 １ ~b2 ｎ , power supply unit b3 １ ~b3 ｎ The means for detecting the voltage value, current value, etc. of each unit can be determined appropriately depending on the type of controller F.

[0040] Abnormality detection unit b4 １ ~b4 ｎ Since the flashing light, unit and equipment in which an abnormality occurs can be easily identified, １ ~A ｎ Address information Ia ｎ or lighting control unit B １ ~B ｎ Address information Ib ｎ Flashing Light A １ ~A ｎ ,Abnormalities in each unit and controller F are indicated by flashing lights A １ ~A ｎ and abnormalities in each unit, or flashing light A １ ~A ｎ Also, there is an abnormality such as a disconnection of the connection between each unit and other units. １ ~b4 ｎ By having this, it is possible to feed back an abnormality signal to the operation console G. １ ~A ｎ and lighting control unit B １ ~B ｎ It is possible to monitor abnormalities such as the above and perform maintenance at the appropriate time.

[0041] In the system 20, the controller F transmits one bit of information in the lighting signal with a predetermined pulse signal width. The predetermined pulse signal width is 0.1 to 499.9 milliseconds. Specifically, when the lighting signal is 256 bits of information and is transmitted as one or more signals, the controller F transmits the first one bit of information and then transmits the remaining 255 bits of information in one-bit units at predetermined intervals. The predetermined interval is 2.3 to 1.95 milliseconds. The predetermined interval is the time from the transmission of the nth one bit of information in the lighting signal to the transmission of the (n+1)th one bit of information in the lighting signal. The predetermined interval is preferably constant. The proportion of the signal width (pulse width) occupied by one bit of information in each interval is not particularly limited. The proportion is 50 to 90%. Furthermore, if the system 20 of the embodiment can specify luminous intensity, the controller F may transmit one bit of information in the luminous intensity specification signal with a predetermined pulse signal width in addition to or instead of the lighting signal.

[0042] If the system 20 has a heater, the controller F may transmit 1-bit information in the heating signal with a predetermined pulse signal width, either simultaneously with the lighting signal or independently. １ ~b4 ｎ In this case, the abnormality detection unit b4 may receive 1-bit information in the abnormality signal transmitted from the abnormality detection unit b4 with a predetermined pulse signal width. １ ~b4 ｎ However, it can also be said that one bit of information in the abnormality signal is transmitted with a predetermined pulse signal width. The predetermined pulse signal widths of the light intensity designation signal, heating signal, and abnormality signal are the same as those described above for the light intensity designation signal, heating signal, or abnormality signal, with the term "lighting signal" being replaced with "light intensity designation signal," "heating signal," or "abnormality signal."

[0043] In this way, by the controller F transmitting or receiving one bit of information in each signal at a predetermined pulse signal width, the influence of noise can be reduced even if noise is mixed into each signal due to a surge or the like. Therefore, the system 20 including the controller F, which transmits or receives one bit of information in each signal at a predetermined pulse signal width, is excellent in noise resistance and prevention of signal degradation, and therefore communication lines that are not optical fiber communication cables and communication lines that do not include shielded wires, i.e., existing communication lines, can also be used as the communication line C. Furthermore, by setting the proportion of the signal width in each interval to the above-mentioned proportion, for example, noise resistance can be further improved and degradation of each signal can be further prevented.

[0044] In the system 20, the abnormality detection unit b4 １ ~b4 ｎ When the lighting signal is not transmitted, the flash lamp A １ ~A ｎ , receiving unit b1 １ ~b1 ｎ , control unit b2 １ ~b2 ｎ , and power supply unit b3 １ ~b3 ｎ An abnormality in at least one of the units is detected.

[0045] In this way, when the lighting signal is not transmitted, the flash lamp A １ ~A ｎ , receiving unit b1 １ ~b1 ｎ , control unit b2 １ ~b2 ｎ , power supply unit b3 １ ~b3 ｎ By detecting the abnormality of flash light A, １ ~A ｎ Before using flash lamp A, １ ~A ｎ , lighting control unit B １ ~B ｎ The above can be replaced, improving maintainability.

[0046] FIG. 2 is an example of a time chart showing the lighting of the LED controller F in the chain flashlight system 20 according to the embodiment. ０ In the example, the controller ON signal is output almost immediately when the power is turned on, but in the flashlight system equipped with LED controller F, the LED has a large inrush current, which causes a time lag in each device.

[0047] Flash lamp A using a conventional high-intensity discharge lamp such as a xenon lamp １ ~A ｎ Analog controller F ０ The controller ON signal is sent to controller F. ０ However, the control ON signal of LED controller F is outputted with a delay after the power is turned on because the inrush current of the LED flash lamp is large. １ ~A ｎ An abnormality (controller F) may cause an alarm to be issued on the control console G.

[0048] As shown in FIG. １ The power ON signal is sent from the control panel G to the flash lamp A via the controller F. １ ~A ｎ and flashing light A １ ~A ｎ is a square wave indicating the rising state of t ２ represents the time it takes for the controller F to start up after the power is turned on. ３ is flashlight A １ ~A ｎ Receiving unit b1 １ ~b1 ｎ Flashlight A sent from １ ~A ｎ As is clear from FIG. ２ >t ３ Therefore, controller F is flashing light A. １ ~A ｎ The time t when ３ Since it cannot start up, an error occurs in controller F and an alarm is issued by console G.

[0049] FIG. 3 is an example of a time chart for the LED controller F in the chain flashlight system 20 of the embodiment after correction. As shown in FIG. 3, adding an off-delay timer (not shown) to the power circuit (not shown) of controller F excites a square wave for t4 seconds, forcing a one-shot lighting signal from the flashlight to ON. This prevents the controller F from issuing an alarm at the console G and allows the controller F to power ON normally. This embodiment eliminates problems with powering on LED flashlights in a chain flashlight system 20 where LED flashlights have been converted. t1 + t4 should be in the range of 0.1 to 3 seconds, preferably 0.5 to 2.5 seconds, and more preferably 1.0 to 2.0 seconds. Furthermore, the following time condition must be met: 0 < t1 < t3 < t2 < t1 + t4 (seconds).

[0050] Compared to conventional high-intensity discharge lamps such as xenon lamps, LED flash lamps are significantly more effective at reducing power consumption and, due to their longer lifespan, are also significantly more effective at saving on maintenance costs, etc. Currently, flash lamps using conventional high-intensity discharge lamps are being replaced with flash lamps using light-emitting elements such as LEDs, and further progress is expected.

[0051] The present invention is not limited to the above-described embodiment, and various modifications and applications of the above-described embodiment are possible.

[0052] This application claims priority based on Japanese Patent Application No. 2023-218721, filed December 26, 2023, the disclosure of which is incorporated herein by reference in its entirety.

[0053] According to the present invention, it is possible to ensure smooth operation of a chain flashlight system equipped with light-emitting elements such as LEDs, and even in systems where construction has been carried out to convert conventional high-intensity discharge lamp systems such as xenon lamps to LEDs, it is possible to ensure smooth operation of the chain flashlight system immediately after the conversion work.

[0054] 20 Chained Flashing Light System A １ , A ２ , A ｎ Flashlight AD Approach direction (arrow) B１ , B ２ , B ｎ Lighting control unit b1 １ , b1 ２ , b1 ｎ Receiving unit b2 １ , b2 ２ , b2 ｎ Control unit b3 １ , b3 ２ , b3 ｎ Power supply unit b4 １ , b4 ２ , b4 ｎ Abnormality detection unit C Communication wiring D Power supply unit E Power wiring F ０ Controller for xenon lamp (analog controller) F Controller (LED controller) G Operation console

Claims

1. A system for a chain-type flash lamp, comprising a plurality of flash lamps, a plurality of lighting control units for controlling the lighting of each of the flash lamps corresponding to each flash lamp, a communication wiring, a power supply unit, a power wiring, a controller, and an operation console. The plurality of lighting control units include a reception unit, a control unit, and a power unit. The communication wiring is connected to the controller, and the power wiring is connected to the power supply unit. The operation console transmits a lighting signal simultaneously to the plurality of lighting control units via the communication wiring through the controller. The reception unit receives the lighting signal. The control unit turns on the power of the power unit based on a time condition from the reception of the lighting signal to the power-on of the power unit set for the corresponding flash lamp. The power unit turns on the corresponding flash lamp when the power is on. The controller transmits one-bit information in the lighting signal with a predetermined pulse signal width. The communication wiring is capable of bidirectional communication in which the operation console can transmit the lighting signal to the lighting control unit through the controller and the lighting control unit can feedback information to the controller. After transmitting the lighting signal, the controller waits until the lighting report information from all the lamps is completed and transmits the result to the operation console.

2. The chain-type flash lamp system according to claim 1, wherein the waiting time of the controller after transmitting the lighting signal until the lighting report information from all the lamps is completed is several seconds.

3. The chain-type flash lamp system according to claim 2, wherein the controller incorporates an off-delay timer to adjust the waiting time.

4. The chain-type flash lamp system according to claim 1, wherein the power supply unit supplies power to the flash lamp and the lighting control unit via the power wiring.

5. The chain-type flash lamp system according to claim 1, wherein the power wiring is single-phase two-wire, single-phase three-wire, or three-phase three-wire.

6. The chain-type flash lamp system according to claim 1, wherein the interval when transmitting one-bit information in the lighting signal with a predetermined pulse signal width is 2.3 to 1.95 milliseconds.

7. The chain flash system according to claim 6, wherein in each of the intervals, the ratio occupied by the signal width (pulse width) transmitting 1-bit information is 50 to 90%.

8. The chain flash system according to claim 1, wherein the communication wiring is one or two or more.

9. The chain flash system according to claim 1, wherein the communication wiring is a metal communication cable or an optical fiber communication cable.

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