JP2019054423A - Light feeding system - Google Patents

Abstract

To provide a light feeding system, including a master unit and a slave unit, capable of controlling light feeding from the master unit to the slave unit without necessity of an operator at a master unit side.SOLUTION: A light feeding system includes one or more slave units and a master unit connected with the one or more slave units through an optical fiber and supplying feeding light to the one or more slave units to distribute electric power. Each of the one or more slave units is configured to transmit an uplink command to the master unit and the master unit is configured to turn on or off light feeding to the one or more slave units according to the uplink control command.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an optical power feeding system.

  An optical fiber is a medium that transmits light in a thin glass wire, and has a characteristic that transmission loss of a high-frequency signal per length is extremely small compared to an electric cable, so that it is a signal transmission medium over a long distance of several meters to several thousand kilometers. Widely used. Optical power feeding is a technology that uses such a communication optical fiber for a small amount of power transmission.

  A master unit on the power transmission side of the optical power feeding includes a high output light source such as a semiconductor laser, converts electric power into light, and outputs it to an optical fiber. The optical fiber transmits light to the slave unit on the power receiving side. The slave unit receives the input light obtained from the optical fiber by using a photodetector such as a photodiode, converts it again into electric power, and stores it when necessary. The slave unit can operate using the generated power.

  When applied to energy transmission, optical fibers have a greater transmission loss than electrical cables, and there are also disadvantages such as low conversion efficiency between optical signals and electrical signals on the power receiving side (about 20-30%). To do. For this reason, the light source for optical power feeding arranged in the master unit requires a large output intensity, and for example, a high-power semiconductor laser having an output number of 100 mW to over 1 W is used.

  However, especially in communication optical fibers, the diameter of the central core for transmitting light is as small as several microns, and when strong light is incident, the core portion melts. Therefore, the incident optical power is generally limited to 10 W or less.

  Because of these limitations, optical power feeding is limited in the available power range and is not a widely used technique. However, since the optical fiber is electrically insulated, the explosion-proof property is extremely high, and it has the advantages that it is difficult to receive electromagnetic interference and has high corrosion resistance. As described above, when it is difficult to use an electric cable or when there is no other appropriate power source in a remote place or remote place, optical power feeding is used as an effective power transmission technique.

  In addition, optical power can be used as a communication medium between the master and slave units for optical power supply, so it is difficult to reach radio waves, and it is difficult to secure wired communication lines. Underground / interior / plant / plant / seabed / desert・ It is also advantageous for use in the mountains and soils. Examples of the actual use of optical power supply technology include remote sensing, which includes sensing data collection in infrastructure such as pipelines, plants, bridges and railways, and remote monitoring by cameras.

  For example, Japanese Unexamined Patent Application Publication No. 2010-193374 (Patent Document 1) discloses an optical transmission method that can reduce the construction cost of a system by using an optical signal having the same wavelength for both power supply and control. Specifically, “the modulated optical signal S is transmitted to the optical transmission lines 3 and 5, and the electric signal output from the light receiving element 20 that receives the optical signal S is used for both power supply and control on the receiving side. An optical transmission method to be used, in which an optical signal S transmitted to the optical transmission lines 3 and 5 includes a first optical signal S1 for power supply and a second optical signal S2 for control having the same wavelength λ1. It is disclosed that the optical signal is time-division multiplexed ”(see summary).

JP 2010-193374 A

  When installing, expanding or maintaining the optical power feeding system, construction is required at the location where the slave unit is installed. Examples of such work include installation of a new slave unit, repair of the slave unit, or replacement of the slave unit. Since the output of the optical power supply laser is large, if the optical power supply is always turned on during the construction of the slave unit, the optical fiber end face or the slave unit may be damaged by the optical power supply laser. Therefore, it is desirable that the optical power supply from the master unit can be turned on or off in the construction of the slave unit. For example, the optical power supply is turned on after installation of the slave unit, or the optical power supply is turned off in accordance with the removal of the slave unit for repair / replacement.

  In order to turn on or off the optical power feeding to the slave unit, it is necessary to operate the master unit in a remote place. For example, a method in which the operator of the slave unit contacts the operator of the master unit to temporarily turn on or off the optical power feeding can be considered. However, this method cannot be adopted if a communication line cannot be secured at the location where the handset is installed. In addition, the control of optical power feeding through manual operation always requires an operator on the base unit side, and an artificial power feeding control error may occur.

  Therefore, a technique capable of controlling optical power feeding from the parent device to the child device without requiring an operator on the parent device side is desired.

  An optical power feeding system according to an aspect of the present disclosure is connected to one or more slave units and the one or more slave units via an optical fiber, and supplies power to the one or more slave units to distribute power. Each of the one or more slave units is configured to transmit an uplink control command to the master unit, and the master unit is configured to transmit the one or more slave units according to the uplink control command. It is configured to turn on or off the optical power feeding to the slave unit.

  According to one aspect of the present disclosure, in an optical power feeding system including a parent device and a child device, optical power feeding from the parent device to the child device can be controlled without requiring an operator on the parent device side.

The structure of the optical power feeding system in Example 1 is shown. 2 is a timing chart according to the first embodiment. The structure of the optical electric power feeding system in Example 2 is shown. 9 shows a timing chart in the second embodiment. The structure of the subunit | mobile_unit in Example 3 is shown. 9 shows a timing chart in the third embodiment. The structure of the subunit | mobile_unit in Example 4 is shown. 9 shows a timing chart in Embodiment 4. The structure of the optical electric power feeding system in Example 5 is shown. 9 shows a timing chart in the fifth embodiment. The structure of the main | base station in Example 5 is shown. 10 shows a slave unit state information table in the internal memory of the master unit in the fifth embodiment. The structure of the subunit | mobile_unit in Example 6 is shown. The subunit | mobile_unit number table inside the subunit | mobile_unit in Example 6 is shown. 10 shows a handset number table inside the base unit in the sixth embodiment. 9 shows a timing chart in the sixth embodiment.

  Hereinafter, an optical power feeding system that performs power transmission using an optical fiber is disclosed. In the optical power supply system, the master unit supplies optical power to the slave unit via an optical fiber. In a typical optical power supply system example of the present disclosure, the slave unit includes a function of transmitting an uplink control command to the master unit, and the master unit turns on the optical power supply according to the uplink control command transmitted from the slave unit. Or includes a function to turn off. Thereby, the optical power feeding from the parent device to the child device can be controlled without requiring an operator on the parent device side.

  The optical power supply system has some specific problems. For example, one problem is that it takes labor, time, and cost to confirm the operation when installing the slave unit in a remote place away from the master unit. In general, the place where the slave unit of the optical power feeding system is installed is a place where the optical power feeding technique is advantageous compared to the power feeding by electricity, that is, the place where the arrangement of the electric wires is difficult or the communication means is difficult to secure. .

  For example, explosive and corrosive environments such as plants and water and sewage-related facilities, and special environments such as dredged land, underground, underwater, and seabed are often candidates. Such locations are generally difficult to access and the cost of installation work and preparation is high. Even in a general environment, it takes labor, time, and cost to move and construct equipment and personnel to a distant place away from the parent machine.

  Reconstruction and extension of the construction period due to the failure of the slave unit will greatly increase the man-hours and costs, so check the operation at the same time as installing the slave unit, and trouble such as failure of the slave unit and poor optical fiber connection. It is desirable to discover on-site and complete the replacement and repair of the handset and optical fiber on the spot. On the other hand, in confirming the operation of the optical power supply device, it is important to turn on the optical power supply and confirm that the power balance is positive or that a prescribed amount of power supply light can be received.

  However, during installation of the slave unit, a plurality of slave units are attached to various locations of the optical fiber, and the construction of the optical fiber is performed, so that the state of the optical fiber may be incomplete. Since the optical output of the optical power supply laser is large, there is a possibility of damaging the connector and the end face of the optical fiber if the power supply laser is always turned on during construction. If an operator is arranged on the base unit side, the possibility of cost and work mistakes increases.

  Therefore, in one example, the slave unit transmits a command for confirming the operation of the slave unit to the master unit when the optical power supply from the master unit is off. This operation confirmation command is an example of an uplink control command. The master unit turns on the optical power supply after receiving the operation confirmation command. Thereafter, the master unit turns off the optical power supply after a lapse of the specified time or upon receiving an operation check end command from the slave unit. With this configuration, it is possible to easily check the operation when the slave unit is installed. When there is a downlink communication path from the parent device to the child device, the parent device may turn on the optical power supply after receiving the operation confirmation command and transmit a downlink response signal to the child device.

  The subunit | mobile_unit may also contain the interface which connects the control apparatus which receives control from the outside, or an external control apparatus. In response to the operation, the control device instructs the slave unit to execute an operation check on the master unit. The slave unit transmits an operation confirmation command according to the instruction. The slave unit transmits information on the result of the operation check to the control device after the operation check is completed. The control device displays the received information. As a result, it is possible to perform the operation check and the result confirmation of the slave unit installed on the spot easily after the slave unit is installed.

  Other problems with optical power supply systems are the stoppage of optical power supply before maintenance work (stopping the operation of the optical power supply system), such as repair / replacement of slave units, and the resumption of power supply after the end of work (system restart). It takes extra effort and time to operate. As described above, the intensity of the power supply light is strong, and it is desirable to temporarily turn off the optical power supply during the maintenance of the slave unit.

  However, since the power supply light source is disposed in the master unit that is remote from the slave unit, it is difficult to turn on or off the optical power supply at an appropriate timing in accordance with the start or end timing of the construction. For example, if the optical power supply is turned off with sufficient time before and after the construction, the downtime of the entire system becomes longer, resulting in a disadvantage in operation. If an operator is arranged on the base unit side, the possibility of cost and work mistakes increases.

  Therefore, in one example, the slave unit includes an interface for connecting an input device or an external input device. The slave unit generates control commands for turning on and off the optical power supply by operating the input device. Thereby, the optical power feeding to the slave unit can be turned on and off at the timing desired by the operator.

  Another problem is that it is difficult to confirm the operation when adding a slave unit of the optical power feeding system. To add a slave unit to an operating optical power supply system, if an optical splitter is not prepared in advance, it is necessary to temporarily disconnect the optical fiber and add an optical splitter etc. in the middle . In this case, the amount of optical power supplied to the slave unit downstream from the additional location can be reduced.

  Theoretically, there is no problem if the margin of the optical power supply to the slave unit on the downstream side exceeds the loss of the optical branching device to be inserted. However, in reality, there is a possibility that the optical loss becomes larger than expected due to parts or construction defects, and the amount of optical power supplied to the downstream slave unit is insufficient, or the upper and lower communications may be interrupted. However, for the same reason as described above, it is necessary to turn off the optical power supply during the expansion work. Since the operation of the optical power feeding system is stopped, it is more difficult to check the connection status of other slave units on the spot.

  Therefore, in one example, after receiving an operation confirmation command from a specific child device and turning on optical power supply, the parent device transmits a status confirmation command to other child devices other than the specific child device. When the other slave unit receives the status check command, it transmits its own connection status information to the master unit. The master unit transmits the received connection status information of the other slave units to the specific slave unit. As a result, information of other slave units can be collected in a specific slave unit.

  After the operation check function ends, the specific slave unit may display the operation state information or connection state information of the specific slave unit and other slave units on the control terminal device. This makes it possible to check the state of the entire optical power feeding system.

  Another problem is registration of the slave unit to the master unit and number assignment to the slave unit. In the optical power supply system, after normal operation of the system, the master unit must manage the presence / absence of failure and sensing data for each of the plurality of slave units, and perform uplink and downlink communications to specific slave units. . For this purpose, the parent device needs to grasp the number of child devices connected to the own device and its unique number (serial number) and assign a child device number to each child device.

  Such management information can be manually set in the master unit and the slave unit by an operator (operator) before or during the installation work. However, various problems may occur, such as work man-hours and device management man-hours increasing, setting errors will occur, or the handset number information in the base unit will need to be reset manually when replacing a faulty handset. . Therefore, it is desirable to automate the slave unit registration to the master unit and the number assignment to the slave unit.

  Actually, in a 1: N network (N is an integer greater than 1) composed of a master unit and a plurality of slave units, there are a number of communication protocols that automatically assign a slave unit number. However, in the existing system, immediately after startup, each slave unit is not registered in the master unit, and the master unit does not know the name or number of slave units to which the master unit is connected. Therefore, a collision occurs in communication from a plurality of slave units to the master unit.

  For this reason, existing protocols generally require complicated procedures such as communication collision detection and random time waiting retransmission from a slave unit. In addition, if a slave unit malfunctions and cannot be started when a slave unit is registered, a slave unit that is not registered will be generated, or when another slave unit is added at a later date, it will communicate with the active slave unit. Collisions can adversely affect system operation.

  Therefore, in one example, the operation confirmation end signal transmitted from the slave unit includes the success / failure information of the operation confirmation. The parent device registers the unique number of the child device whose operation has been successfully confirmed in the internal child device management table, or assigns a unique number to the child device. As a result, the slave units can be easily managed while suppressing adverse effects on the system operation.

  FIG. 1 schematically illustrates a configuration example of the optical power feeding system according to the first embodiment.

  The optical power feeding system includes a master unit 200 and two slave units 201-1 and 201-2, which are connected in a star shape via an optical fiber 105 and an optical coupler 106. The optical fiber transmits the wavelength-multiplexed power supply light 112 having the wavelength λp and the upstream communication light 114 having the wavelength λu simultaneously.

  The base unit 200 includes a power supply laser light source (LD) 101 (wavelength λp) and an upstream communication optical receiver (Rx) 103 (reception wavelength λu). Is coupled to the optical fiber.

  The two slave units 201-1 and 201-2 each include a feeding optical receiver 109 (reception wavelength λp), a current-voltage conversion circuit (IVC) 205, and an upstream communication optical transmitter 111 (transmission wavelength λu). . In each of the slave units 201-1 and 201-2, the wavelength multiplexer / demultiplexer 108 can transmit the transmission light and the reception light through a single optical fiber.

  The optical combiner / splitter 106 divides the strong feeding light output from the feeding laser light source 101 into two. The feeding light receiver (PD) 109 in the slave unit receives one of the divided feeding lights, and the current-voltage conversion circuit 205 converts the feeding light into a voltage signal and supplies it to the operating power of the slave unit.

  Uplink communication from the slave unit to the master unit is used to transfer sensor information measured from the slave unit to the master unit. The uplink communication light having the wavelength λu output from the upstream transmission optical transmitter (Tx) 111 in the slave unit is combined with the upstream communication light from the other slave units by the optical combiner / branch unit 106 to be used for uplink communication in the master unit. The optical receiver 103 collectively receives the signals.

  Each of the slave units 201-1 and 201-2 includes an operation check command generation unit (OP) 204, and the master unit 200 includes a received signal analysis unit (CA) 202. In the non-operating state of the optical power supply system (optical power supply off), after the installation of the slave unit is completed, the operation check command generation unit 204 generates an operation check command addressed to the master unit 200, for example, according to the operation of the operator. Send. The operation confirmation command generation unit 204 can be configured by, for example, a processor or a dedicated logic circuit that operates according to a program stored in a memory.

  The slave units 201-1 and 201-2 may include a primary battery or a secondary battery in order to operate the operation check command generation unit 204, or may receive power from the outside. For example, a terminal device connected to the slave unit or a dedicated external power source may supply power to the slave unit. This is the same in other embodiments.

  The operation confirmation command is written in, for example, a communication packet used for uplink communication, and reaches the parent device 200 via the uplink communication optical transmitter 111 and the optical fiber 105. When the reception signal analysis unit 202 in the base unit detects an operation confirmation command in the output signal of the optical receiver for uplink communication 103, it transmits an optical power supply on signal to the optical power supply control unit (CTL) 203. The operation confirmation command can be detected, for example, by including an identification code for identifying the type of command in the command. The reception signal analysis unit 202 and the optical power feeding control unit 203 can be configured as a logic circuit, for example, or can be configured as a program that can be stored in the memory of the slave unit and executed by the processor of the slave unit.

  The optical power supply control unit 203 controls the power supply of the power supply laser light source 101 to turn on the optical power supply, and temporarily operates the optical power supply system. Thereby, the operation state of the installed child device 201-1 can be confirmed by, for example, the operator.

  FIG. 2 shows a timing chart in the first embodiment. The operation check of the newly installed child device 201-1 is shown. The slave unit 201-1 sends an operation confirmation command to the master unit 200. When receiving and detecting the operation confirmation command, master device 200 turns on the optical power feeding. When the slave unit 201-1 detects the transmitted power supply light, the operation of the slave unit 201-1 can be confirmed.

  Specifically, when the power supply light is turned on within a predetermined time after the operation check command is transmitted, the slave unit 201-1 is connected to the optical fiber 105, and the uplink communication to the master unit 200 is normally performed. You can confirm that it is working.

  The state of the power supply light to the child device 201-1 can be detected by various methods. For example, the state of the power supply light can be confirmed by measuring the output voltage 206 of the current-voltage conversion circuit 205 with an external voltage measuring device 209. In addition, the state of the feed light can be confirmed by measuring the light intensity in the downstream direction with an optical power meter 208 connected to an optical branch point 207 provided in the middle of the optical fiber 105.

  The optical branching point 207 is, for example, an optical branching circuit with a small loss attached in advance, an open point of the optical fiber going downstream, or a bending point for taking out a part of light out of the fiber.

  After the operation check is completed, the child device 201-1 transmits an operation check end command to the parent device 200, and when the parent device receives this command, the optical power supply is turned off to return to the initial state. In addition to this, for example, the slave device 201-1 may transmit an operation confirmation end command to the master device 200 or the operation confirmation according to the operation of the operator with respect to the slave device 201-1 or the elapse of a specified time. The end command may be omitted. In this case, for example, the master device 200 may stop the optical power supply after a specified time has elapsed since the start of the optical power supply.

  In the configuration example of FIG. 1, the number of optical fibers connecting the master unit 200 and each of the slave units 201-1 and 201-2 is only one, and optical power feeding and upstream communication light share the same optical fiber. To do. In this embodiment and other embodiments, the optical fiber may further transmit downlink communication light as necessary, and some or all of the light may be transmitted by separate optical fibers. These lights may be transmitted by different cores of the multicore fiber. The same applies to other embodiments.

  The number of slave units may be any number greater than or equal to 1, and the configuration of the optical fiber network connecting the master unit and a plurality of slave units is not limited to the star type shown in FIG. Arbitrary types such as a ladder type, a sequential branch type, and a ring type can be used. Various optical fibers such as single mode and multimode can be used depending on the transmission distance, loss, and the like. This is similar to the other embodiments.

  In this embodiment, in the optical power feeding system, it is possible to check the operation of the slave unit on the spot immediately after the slave unit is installed without requiring an operator on the master unit side. As a result, it is possible to detect the correctness, failure, or malfunction of the slave unit on the spot, shorten the construction period, and eliminate the need for re-construction. In addition, it is possible to prevent an artificial mistake that inadvertently turns on or off the optical power supply when checking the operation of the slave unit or during construction.

  FIG. 3 shows the configuration of the optical power feeding system according to the second embodiment. The optical power feeding system of the figure includes a downstream optical communication path, and the slave unit further includes a function of accepting an operation confirmation start instruction by an operator and a result display function. Thereby, the operation | movement confirmation of a subunit | mobile_unit can be performed more reliably and highly accurately. The subunit 201-2 has the same configuration as the subunit 201-1.

  Base unit 200 includes a downstream optical transmitter (Tx) 102, and downstream communication light 113 of wavelength λd, which is the output light, is combined with another optical signal by wavelength multiplexer / demultiplexer 104 and optical fiber 105. Is sent out. A part branched by the optical multiplexer / demultiplexer 106 is input to the slave 201-1 and received by the optical receiver (Rx) 110 for downlink communication.

  In addition, a response signal generation unit (RG) 212 is arranged in front of the downlink communication optical transmitter 102 in the master unit, and a response signal detection (RA) unit 213 is arranged immediately after the downlink communication optical receiver 110 in the slave unit. Has been. Thus, it is possible to generate and detect a response signal to be transmitted from the master unit to the slave unit.

  The subunit | mobile_unit 211-1 further contains the main control part 211. FIG. The response signal generation unit 212 of the master unit, and the main control unit 211 and the response signal detection unit 213 of the slave unit are each possible, for example, in a program of a slave unit and executed by a processor of the slave unit or a logic circuit. Can be configured.

  The child device 201-1 further includes a push button 210 for starting the operation confirmation of the child device and an LED 214 for displaying the operation confirmation result. The installation worker of the child device 201-1 can perform the operation confirmation work and the confirmation of the result directly on the spot using the push button 210 and the LED 214.

  FIG. 4 shows a timing chart in the second embodiment. In this example, after the installation work of the child device 201-1 is completed, the operator (operator) presses the push button 210 of the child device 201-1 so that the operation check of the child device is started. By manually starting the operation check in this way, the operator can start the operation check with the optical power supply turned on after taking measures such as termination of the optical fiber in advance.

  When detecting that the push button 210 has been pressed, the main control unit 211 of the slave unit instructs the operation check command generation unit 204 to generate an operation check command. The operation confirmation command generation unit 204 transmits an operation confirmation command to the parent device 200. The base unit 200 that has received the operation check command turns on the optical power supply to the slave units 201-1 and 201-2, and then transmits the response signal generated by the response signal generation unit 212 to the slave unit 201-1. .

  The subunit | mobile_unit 201-1 receives a response signal with the optical receiver 110 for downlink communications. The subunit | mobile_unit 201-1 can obtain the connection information of downstream optical communication, such as the quality of a downstream optical communication line, and an error rate, by analyzing a response signal. Further, by including the connection status information of upstream optical communication with the slave unit 201-1 detected by the master unit 200 and the operation status information of the master unit in the response signal, more reliable and detailed operation confirmation can be performed. It becomes.

  The status information that can be transmitted from the master unit to the slave unit using the response signal includes, for example, the error rate and reception intensity information of the received signal in the optical receiver for uplink communication 103, and the optical output intensity information of the power supply laser light source 101 (rated Value, setting value, measurement value). The main control unit 211 of the slave unit 201-1 that has received the response signal calculates the quality and loss of the uplink communication line, the loss of the feed light, and the like based on the status information in the response signal. For example, the main control unit 211 can check the operation of the child device 201-1 more precisely by comparing the calculated value with a reference value.

  For example, when the response signal includes the reception intensity of the uplink communication optical receiver 103, the main control unit 211 divides the optical output intensity of the uplink communication optical transmitter 111 in the slave 201-1 by this value (dB). By subtracting if displayed, the loss of the upstream communication line can be calculated. When this loss value exceeds the upper limit value of the loss of the uplink communication line, it can be determined that “connection failure due to excessive loss of the uplink line”.

  The operation confirmation method and criteria are not limited to the above example. For example, the slave 201-1 may compare the reception intensity of the uplink communication optical receiver 103 with the minimum reception intensity. The subunit | mobile_unit 201-1 may use the feeding light loss obtained by dividing the optical output intensity of the feeding laser light source 101 by the received light intensity of the feeding optical receiver 109 as a reference for operation confirmation. The subunit | mobile_unit 201-1 may reference a some value for operation | movement confirmation.

  As described above, the slave unit 201-1 has received the operation confirmation command, the power supply light state and reception intensity transmitted from the master unit 200, the presence / absence of a response signal from the master unit, and the parent included in the response signal. Operation check is performed based on multiple factors such as machine connection information or status information. After completion of these operation confirmations, the child device 201-1 transmits an operation confirmation end command indicating success or failure of the operation confirmation to the parent device 200.

  Moreover, the subunit | mobile_unit 201-1 shows the result of operation confirmation by LED214, and notifies an operator of the result of operation confirmation. For example, the child device 201-1 controls the color or lighting state (including blinking) of the LED 214 according to the result of the operation check. In this embodiment, the LED 214 is used as the display device for the operation confirmation result. However, different devices can be used, including various display lamps, liquid crystal display devices, buzzers, and vibrators.

  The downstream optical communication in this embodiment is used only for transmitting a response signal from the parent device to the child device. For example, a status confirmation request from the parent device to the child device, a sensing trigger, and various setting information It may be used for other purposes such as transmission.

  In all of the embodiments of the present invention, it is assumed that the upstream communication and the downstream communication between the master unit and the slave unit all use optical fiber communication. The essence does not change even when implemented by wired communication. For example, in some optical power feeding systems, a case where a public radio, a specific radio, or the like is used as an uplink used for collecting sensing data or captured images has been studied. A part of the downlink communication line may be realized using a wireless line.

  In the example of FIG. 3, different wavelengths λp, λd, and λu are assigned to the optical power supply, the upstream communication light, and the downstream communication light, respectively. These wavelengths may be appropriately determined based on the loss of the optical fiber and the characteristics of the laser light source. For example, 1.48 [mu] m or 0.98 [mu] m or 1.5 [mu] m with a small optical fiber loss may be assigned to the power supply light source, which is available at a low cost. You may allocate 0.85um, 1.3um, or 1.5um for optical communication. The same wavelength may be assigned to uplink communication and downlink communication.

  FIG. 5 shows the configuration of the slave 201-1 in the third embodiment. The slave unit 201-1 has an optical power supply stop button 250 and an optical power supply start button 251 as input devices, and an optical power supply state display LED 253 as a display device so that power supply from the master unit can be operated from the slave unit side. Have. In this configuration, the slave unit is equipped with a start / stop button for optical power supply, so that when the slave unit is instructed to stop and resume optical power supply during maintenance of the slave unit, this causes damage to parts due to the supplied light. In addition, the stop time of the optical power feeding system can be shortened.

  When the optical power supply stop button 250 is pressed by the operator, the power supply control command generation unit 252 inside the slave unit generates a power supply off command, and when the optical power supply start button 251 is pressed, the power supply on command is generated. The power supply control command generation unit 252 can be configured by, for example, a program or a logic circuit that is possible in the memory of the slave unit and executed by the processor of the slave unit.

  The control command generated by the power supply control command generation unit 252 is input to the upstream communication optical transmitter 111 and transmitted to the parent device 200. When the received signal analysis unit 202 in the parent device 200 detects a control command, the optical power supply control unit 203 turns on or off the power supply laser light source 101 according to the control command.

  The light feeding state display LED 253 of the slave unit 201-1 is connected to a current-voltage conversion circuit 205 that converts the output current of the feeding light receiver 109 into a voltage, and is turned on or off depending on the state of the feeding light. Thereby, the operator of the subunit | mobile_unit 201-1 can stop or start an optical power feeding at arbitrary timings, and can confirm the result visually.

  FIG. 6 is a timing chart in the third embodiment and shows an example in which the function of the present embodiment is used for maintenance work of the child device 201-1. An operator (operator) who performs maintenance of the slave unit 201-1 presses the optical power supply stop button 250 before the operation, whereby the master unit 200 stops optical power supply and the optical power supply state display LED 253 is turned off. . Thereby, the operator can confirm the optical power supply stop visually and can start the maintenance work of the child device 201-1.

  After the maintenance work is completed, the operator presses the optical power supply start button 251, whereby the master unit 200 starts optical power supply. The optical power supply state display LED 253 is lit according to the state of the power supply light. Thereby, the operator can confirm the start of optical power feeding visually and can finish the work. Although omitted in the description of FIG. 6, after completion of the maintenance work of the child device 201-1, the child device 201-1 may perform an operation check shown in another embodiment as necessary.

  The optical power supply status display LED 253 may be turned off when the optical power supply is stopped and turned on when the optical power supply is stopped for power saving. The optical power supply state display LED 253 may be omitted.

  FIG. 7 shows the configuration of the slave unit 201 in the fourth embodiment. The subunit | mobile_unit 201 has the connector 227 for communication, and can attach or detach the external terminal device 223 used for on / off switching of the optical power feeding by an operator, reception of an operation confirmation start instruction, and a result display.

  The slave unit 201 further includes a battery (BAT) 220 that accumulates output power of the current-voltage conversion circuit 205, and an AD conversion circuit (ADC) 221 that measures the output voltage of the current-voltage conversion circuit 205 as a measure of the optical power supply amount. Have.

  The external terminal device 223 is attached to the slave unit 201 when the power is turned on and the operation is confirmed after the slave unit is installed. The external terminal device 223 includes a communication control circuit 226 connected to a keyboard 225 used for setting operation parameters of the slave unit 201 and an operation confirmation start instruction, a liquid crystal display device 224 used for displaying results, and a communication cable 228, for example. .

  For example, when checking the operation after installation of the slave unit 201, the operator attaches the communication cable 228 of the external terminal device 223 to the communication connector 227 of the slave unit 201 and uses the keyboard 225 or the liquid crystal display device 224. Instructing power-on of slave unit 201 and start of operation check. These operations are sent to the slave unit 201 via the communication control circuit 226, the communication cable 228, and the communication connector 227, and the main control unit 211 of the slave unit 201 starts the operation confirmation process.

  FIG. 8 shows a timing chart in the fourth embodiment. In this example, the external terminal device 223 transmits a power-on and operation check start instruction to the slave unit 201. In response to the instruction, handset 201 turns on its own power supply and starts transmitting an operation confirmation command to base unit 200. The subunit | mobile_unit 201 operate | moves with the electric power supplied from the battery 220. FIG. Master device 200 transmits an operation confirmation response signal after turning on optical power feeding.

  After the operation check is completed, the slave unit 201 transmits an operation check end command to the master unit 200 and displays the operation status information or the connection status information, which is the operation check result of the slave unit 201, on the external terminal device 223. To do.

  These operation state information and connection state information may be information that is normal or abnormal in operation or connection, or information that serves as a basis for the determination. The operation state information is, for example, arranged in the self-operation check result of the slave unit 201, the amount of received light of the slave unit 201, the loss of the feed light from the master unit 200 to the slave unit 201, and the output of the feed optical receiver. The output voltage of the current-voltage conversion circuit 205, the read value of the AD conversion circuit 221, the storage amount of the battery 220, and the like.

  The connection status information related to uplink communication includes, for example, success / failure of uplink communication between the parent device 200 and the child device 201, a bit error rate and the number of bit errors that serve as an upstream communication quality index, and from the child device 201 to the parent device. The amount of uplink communication light loss to 200, the optical output intensity of the uplink communication transmitter in the slave unit 201, the received light intensity of uplink optical communication in the base unit 200, and the like.

  The connection status information regarding downlink communication includes, for example, success / failure of downlink communication between the parent device 200 and the child device 201, a bit error rate and the number of bit errors that become a quality indicator of downlink communication, and the parent device 200 to the child device 201. The amount of loss of downstream communication light reaching the base station, the optical output intensity of the downstream communication transmitter in the base unit 200, the received light intensity of downstream optical communication in the slave unit 201, and the like.

  From this information, the operator determines the operating state and connection state of the installed slave unit 201, shuts off the power source of the slave unit 201, and if the determination result is satisfactory, the installation operation of the slave unit 201 ends. To do. If the determination result is defective, the operator can perform operations such as restarting, repairing and replacing the slave unit 201, investigating a defective portion of the optical fiber connection, and reconnection on the spot.

  By making the external terminal device 223 detachable from the slave unit 201 as in this example, more detailed operations and result display on a large screen can be performed while keeping the size and power consumption of the slave unit 201 small. .

  The configuration of the external terminal device 223 is not limited to the above example. The external terminal device 223 may be configured to include input devices such as operation buttons, a mouse, and a touch pad, for example. The external terminal device 223 may include a character user interface, a GUI, an analog meter, and the like. The external terminal device 223 may be a commercially available console terminal or notebook PC.

  The connection between the external terminal device 223 and the slave unit 201 may have any configuration as long as it is an information line.

  For example, UART, I2C, SPI, Ethernet (registered trademark) and other wired serial lines widely used in embedded devices and their connectors, or parallel lines and connectors such as GPIO and SCCI, optical fiber lines and optical fiber connectors are used. May be. The connection port does not necessarily need to be in physical contact, such as an infrared communication port such as IrDA, a Bluetooth (registered trademark) built in the slave unit, a wireless line such as a specific power-saving radio, an antenna, an electromagnetic induction connection, etc. A non-contact line may be used.

  FIG. 9 shows the configuration of the optical power feeding system in the fifth embodiment, and shows an example in which a new slave unit 201-2 is added upstream of the existing slave unit 201-1. In this example, the master unit and the slave unit are connected using a power supply optical fiber 240 and a vertical communication optical fiber 241. In order to branch the feed light and the upper and lower optical communication light, respectively, an individual feed optical branching device 242 and an upper and lower communication optical branching device 243 are used.

  Compared with the configuration of FIG. 1 or FIG. 3, this configuration can reduce the loss caused by the wavelength multiplexer / demultiplexer arranged in the path of the feed light, and can increase the optical feed efficiency. In this example, the optical power supply is temporarily stopped when the slave unit 201-2 is added, and a new power supply optical branching device 244 and a new vertical communication light are respectively provided between the power supply optical fiber 240 and the vertical communication optical fiber 241. The branching unit 245 is inserted, and the extension slave unit 201-2 is connected thereto.

  When the slave unit is added, a new optical component is inserted into the optical fiber upstream of the existing slave unit 201-1 to increase the optical loss, and the power supply light received by the slave unit 201-1 is correspondingly increased. There is a possibility that the reception intensity of power and upper / lower communication light is reduced, and an excessive loss occurs due to poor connection of the optical fiber, which may hinder the operation of the slave 201-1. For this reason, it is desirable to verify the operation of not only the expanded slave units but also other slave units after construction.

  FIG. 10 shows a timing chart in the fifth embodiment. FIG. 10 shows a procedure for confirming the operation of the entire optical power feeding system by confirming not only the operation of the additional child device 201-2 but also the connection state of other existing child devices via the parent device 200. Show. In this example, the external terminal device 223 transmits a power-on and operation check instruction to the added slave unit 201-2. The slave unit 201-2 transmits an operation confirmation command to the master unit 200 after power-on of the slave unit 201-2.

  In response to the operation confirmation command, base unit 200 transmits an operation confirmation response signal after turning on the optical power supply. Furthermore, parent device 200 also transmits a status confirmation command to other existing child devices (in the configuration of FIG. 9, child devices 201-1 and 201-3). Master device 200 stores information for managing the slave device, and determines a command transmission destination with reference to the information.

  The slave units 201-1 and 201-3 are turned on when the optical power supply from the master unit 200 is turned on, and thereafter, in response to a status confirmation command transmitted from the master unit 200, their own operation state information and connection The status information is returned to the parent device 200. Master device 200 transfers the operation status information and connection status signal of these other slave devices to the added slave device 201-2. As a result, the expanded slave unit 201-2 can display not only the operation / connection state of the own unit but also the operation / connection state of other slave units received from the master unit on the external terminal device 223.

  For such operation / connection status information of other slave units, items almost common to the operation status information / connection status information of the slave units in the above-described fourth embodiment can be used. For example, the amount of received light and the success / failure information of the upper / lower communication. In this example, the success or failure of the extension is determined by the operator of the external terminal device 223, notified to the child device 201-2 by the success / failure notification button, and further notified to the parent device 200 as an operation confirmation end command. The success or failure of the extension may be configured such that the added child device 201-2, the parent device 200, or the like automatically determines.

  FIG. 11 shows a configuration of base unit 200 in the fifth embodiment. The master unit 200 stores the function of measuring the output intensity of the power supply light as means for acquiring the master unit internal information used for determining the operation / connection state of the slave unit and the operation / connection information of other slave units in the memory. Has the function of saving.

  A master unit CPU 267 that controls the operation of the entire master unit 200 is arranged inside the master unit 200. The power supply controller 203 controls the laser current source 263 according to a command from the master unit CPU 267. This is realized by turning on / off the current value.

  Also, a modulation circuit 233 and a downlink communication laser 266 are arranged inside the downlink communication optical transmitter 102, and the modulation circuit 233 converts the digital bit string output from the master CPU 267 into the modulation current of the downlink communication laser 266. The downstream communication light having the wavelength λd is generated by the conversion. The upstream communication light of wavelength λu transmitted from the slave unit is input to the upstream communication optical receiver 103, and the received light is converted into a photocurrent by the upstream optical communication receiver 265, and this is converted into a decoding circuit 231. The digital bit string is returned to and input to the master CPU 267.

  In this example, the base unit 200 used in the optical power feeding system of FIG. 9 is configured such that two optical fibers, a power feeding optical fiber 240 and a vertical communication optical fiber 241, are connected to the base unit. The former is the power supply laser light source 101 inside the base unit, and the latter is the optical transmitter 102 for downstream communication and the optical receiver for upstream communication via the upper / lower communication wavelength multiplexer / demultiplexer 262 that separates the upper and lower communication lights. Connected to the machine 103.

  In this example, the components such as the reception signal analysis unit 202 and the operation check command generation unit 204 shown in the above-described embodiment of the parent device 200 are realized by a program inside the parent device CPU 267.

  The function of measuring the above-mentioned feed light intensity includes the feed light optical branching device 260 that branches a small part of the feeding light, the photodetector 261 that measures the light intensity, and the AD that converts the output signal into a digital value. This is realized by providing the conversion circuit 221. This does not particularly limit the means for realizing the power supply light intensity measurement function. For example, the measurement may be made from the output signal of the light intensity monitor photodetector mounted inside the package of the power supply laser light source 101.

  The power supply light intensity of the base unit 200 measured in this way is taken into the base unit CPU 267 and transmitted as a part of the response signal to the added slave unit, for calculating the loss of the optical fiber path in the slave unit. Used. Note that it is not always necessary to carry out such a complicated calculation or success / failure of extension in the slave unit. For example, it may be performed by the master unit CPU 267 in the master unit 200 with sufficient power. What is necessary is just to transmit and display the result calculated and determined with the main | base station to the terminal unit and operator connected to the sub-unit and the sub-unit.

  Further, as a function of storing the operation / connection state of another slave unit, the master unit internal memory 264 is connected to the master unit CPU 267 and a slave unit state information table is provided therein. FIG. 12 shows an example of a slave unit state information table arranged in the master unit internal memory 264.

  In this example, the slave unit state information table stores the slave unit number of each slave unit and the received light reception intensity of each slave unit received from each slave unit. The leftmost columns of this table are the slave unit numbers 1, 2, 3, and 4. The slave units 201-1 to 201-3 (assuming that 201-2 is newly added) in FIG. It is assumed that it corresponds to the slave unit 201-4 (not shown in FIG. 9).

  The previous power supply light intensity in the column 312 is a record of the amount of received light collected from each slave unit before the extension work of the slave unit 201-2. Further, the optical power receiving and receiving intensity collected from each slave unit after the extension of the slave unit 201-2 is shown in the right end column. Even if only the right column is used, it is possible to determine whether the optical power supply amount is good or not, but by comparing the optical power supply amount before and after the construction as in this example, it is possible to more accurately evaluate the loss change of the optical fiber path due to the construction.

  For example, when the power supply amount is 50 mW or more, the extension value from the right column (number 2 = 201-2) and all other child devices satisfy the specified power supply amount, and the construction result is “good”. Can be judged. On the other hand, when comparing the power supply light intensity before and after the construction, it can be seen that the power supply amount is halved for the slave unit (number 1 = 201-1) downstream of the added slave unit 201-2.

  Compare this value with the loss of the new optical splitter (244 in FIG. 9) inserted at the time of construction, and if the reduction in the amount of feeding is excessive, an excess loss has occurred in the optical feeding path during construction. I can understand. In addition, after the construction or before and after construction, the reception strength of downstream communication light of each slave unit, the reception strength of upstream communication light from each slave unit in the master unit, etc. are also added to the table, so that excess loss in the upper and lower optical communication paths can also be It becomes possible to grasp.

  It should be noted that these past operation / connection state information may be recorded at any time. For example, in accordance with an instruction from the external terminal device 223 of the present invention, each slave unit is set in the master unit at a timing immediately before installation of the slave unit. Operation / connection status information may be collected and recorded, automatically recorded on the master unit immediately after each slave unit is installed, or regularly recorded on the master unit during normal operation of the optical power supply system. It doesn't matter.

  FIG. 13 is a configuration diagram of the slave unit 201 of the present invention in the sixth embodiment of the present invention, and shows an example in which a slave unit number table is arranged in the slave unit internal memory 273.

  Further, a large-capacity capacitor 270 is provided as a power storage device inside the slave unit 201, and an external battery 271 provided in the external terminal device 223 is used as an operating power source of the slave unit when the optical power supply is stopped.

  In this example, a power supply line 272 from the external battery 271 in the external terminal device 223 is wired in parallel with the communication cable 228 of the external terminal device 223. This wiring is connected to the power supply unit inside the slave unit via the communication connector 227, and can supply operating power to the slave unit 201 when the external terminal device 223 is connected.

  Further, assuming that the slave unit of this example is used in the optical power feeding system of FIG. 9, a power feeding optical fiber 240 and a vertical communication optical fiber 241 are connected. The former is connected to the feeding optical receiver 109 in the slave unit 201, and the latter is connected to the upstream optical transmitter 111 and the downstream communication via the upper / lower communication wavelength multiplexer / demultiplexer 274 that separates the upper and lower communication wavelengths. The optical receiver 110 is connected.

  A downstream optical receiver 230 and a decoding circuit 231 are arranged inside the downstream optical receiver 110, and converts downstream communication light of wavelength λd input from the optical fiber 241 for vertical communication into a digital bit string. Then, the data is input to the main control unit (child device CPU) 211 that manages the operation of the entire child device. The digital bit string output from the main control unit 211 is converted into uplink communication light having a wavelength λu by the modulation circuit 233 and the uplink communication laser 232 inside the uplink communication optical transmitter 111 and is used for the upper and lower communication optical fiber 241. Is sent to the main unit. In this embodiment, the functions of the operation check command generation circuit and the response signal detection circuit described above are realized by software inside the slave CPU, but the functions and configurations are the same as those of the other embodiments.

  FIG. 14A and FIG. 14B are explanatory diagrams showing a base unit number and a handset number table inside the handset in the sixth embodiment of the present invention. FIG. 14A shows an example of a handset number table arranged in handset internal memory 273 of FIG. In the unique number column on the left column, a unique number (such as a serial number) that is different for each child device assigned in advance to each child device is recorded.

  This number is notified to the connected master unit and used for individual identification of the slave unit at the time of initial installation or maintenance replacement. The right column is a convenient slave unit number assigned by the master unit after the operation of the optical power feeding system. This number can be widely used for designation of a slave unit in downstream optical communication, identification of a source slave unit in upstream communication, display location of the slave unit and display / identification of sensing data, and the like.

  In this example, ascending order integers are used for the slave unit numbers for simplicity, but other symbols and numbers may be used as long as each slave unit can be identified. For example, it is possible to use flying numbers or arbitrary character strings, or to directly use the serial number of the slave unit itself.

  FIG. 14B is an example of a slave unit number table on the master unit side arranged in the master unit internal memory 264 of FIG. The left column is a slave unit number assigned for convenience by the master unit to the slave unit managed by the master unit, and the serial number of the corresponding slave unit is registered in the right column. By having such a table, the master unit can grasp the slave units managed by the master unit and the number of the slave units, and can easily identify the destination and transmission source of the vertical optical communication with the slave units.

  FIG. 15 shows a timing chart in the sixth embodiment. Steps of automatic registration of slave units and assignment of slave unit numbers are added to the time chart of the fourth embodiment shown in FIG. According to the present embodiment, it is possible to check the operation of the slave unit and turn on / off the optical power supply of the master unit with a simple configuration, and to easily register the slave unit and assign a number.

  In this procedure, the newly installed slave unit simultaneously notifies its own serial number when sending an operation confirmation command to the master unit by operating the terminal.

  The master unit temporarily records the slave unit serial number, transmits a response to the slave unit, and then receives an operation confirmation end command from the slave unit. In these exchanges, it is necessary to communicate with an unregistered slave unit as the destination, but the received slave unit serial number can be designated as the destination as it is, or a temporary slave unit number can be assigned. This can be solved by a method such as preparing a special destination for only the active handset.

  When the result of the operation check is good, the master unit performs a registration process for adding the slave unit serial number to a blank in the management table of the host device, and notifies the slave unit of the corresponding slave unit number. Upon receiving the notification, the slave unit displays the registration result and the assigned slave unit number on the terminal device, and notifies the master unit that the slave unit number is accepted and completes the registration of the slave unit.

  If the operation confirmation is negative, the above registration and assignment of slave unit numbers are not performed. If the serial number of the slave unit is already registered in the management table, the master unit does not add it, so that the same slave unit can be duplicated during repeated operation checks and operation checks after maintenance work. It is possible to avoid registration and double assignment of handset numbers. In addition, when there is no slave unit once registered due to failure replacement or the like, a function of deleting the faulty slave unit on the registration table of the master unit from an external terminal or another device may be provided.

  The slave unit number registration table on the master unit side and the slave unit number registration table on the slave unit side are not necessarily required for both, and either one may be used. For example, if the master unit uses the slave unit serial number or its hash value as the slave unit identification or slave unit address, the assignment of the slave unit number is not necessarily required, and the slave unit number registration table on the slave station side is not required. Become. Conversely, if the slave unit does not transmit a unique number to the master station, the unique number field is not required in the table on the master station side. These operations can be selected according to the implementation and function of the optical power feeding system.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  Each of the above-described configurations, functions, processing units, and the like may be realized by hardware by designing a part or all of them, for example, with an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function can be stored in a memory, a hard disk, a recording device such as an SSD (Solid State Drive), or a recording medium such as an IC card or SD card.

  In addition, the control lines and information lines are those that are considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. In practice, it may be considered that almost all the components are connected to each other.

100: Master unit, 101: Laser light source for power supply, 102: Optical transmitter for downlink communication 103: Optical receiver for uplink communication, 104: Wavelength multiplexer / demultiplexer 105: Optical fiber, 106: Optical branching unit 107: Slave unit 108: Wavelength multiplexer / demultiplexer 109: Feed light receiver 110: Downlink optical receiver 111: Uplink optical transmitter 112: Feed light 113: Downlink communication light 114: Uplink communication light 200: Master unit 201: Slave unit 202: Received signal analysis unit 203: Optical power supply control unit 204: Operation confirmation command generation unit 205: Current-voltage conversion circuit 206: Output voltage 207: Optical branch point 208: Optical power meter 209: Voltage measuring device 210: Push button, 211: Main control unit, 212: Response signal generation unit 213: Response signal detection unit, 214: LED
220: battery, 221: AD conversion circuit 223: external terminal device, 224: liquid crystal display device, 225: keyboard 226: communication control circuit, 227: communication connector, 228: communication cable 230: receiver for downstream optical communication, 231 : Decoding circuit 232: Laser for upstream optical communication, 233: Modulation circuit 240: Optical fiber for feeding, 241: Optical fiber for vertical communication 242: Optical branching device for feeding, 243: Optical branching device for vertical communication 244: For new feeding Optical branching device 245: Optical branching device for new vertical communication 250: Optical power supply stop button 251: Optical power supply start button 252: Power supply control command generation unit 253: Optical power supply status display LED,
260: Optical splitter for feeding light, 261: Photo detector, 262: Wavelength multiplexer / demultiplexer for upper and lower communication 263: Laser current source, 264: Master unit internal memory, 265: Receiver for upstream optical communication 266: Downstream light Communication laser, 267: Master CPU
270: Large-capacitance capacitor, 271: External battery, 272: Power supply line 273: Slave unit internal memory, 274: Optical multiplexer / demultiplexer for vertical communication

Claims (10)

With one or more slaves,
A master unit connected to the one or more slave units via an optical fiber, and supplying power to the one or more slave units to distribute power;
Each of the one or more slave units is configured to transmit an uplink control command to the master unit,
The optical power feeding system, wherein the parent device is configured to turn on or off the optical power feeding to the one or more child devices in accordance with the uplink control command. The optical power feeding system according to claim 1,
The first slave unit in the one or more slave units transmits an operation confirmation command for confirming the operation of the first slave unit to the master unit in a state where the optical power supply from the master unit is off. Configured as
The base unit is
In response to the operation confirmation command, the optical power supply to the one or more slave units is turned on,
After turning on the optical power supply to the one or more slave units, in response to an elapse of a specified time or an operation confirmation end command from the first slave unit, the optical power supply to the one or more slave units is turned off. An optical power feeding system configured to be. The optical power feeding system according to claim 2,
The optical power supply system is configured such that the master unit transmits a downlink response signal to the first slave unit before the optical power supply to the one or more slave units is turned on and later turned off. . The optical power feeding system according to claim 3,
The optical power feeding system, wherein the downlink response signal includes operation state information of the parent device or communication state information between the parent device and the first child device detected by the parent device. The optical power feeding system according to claim 1,
Each of the one or more slave units includes a terminal for connecting an input device or an external input device, and is configured to generate and transmit the uplink control command to the master unit according to an operation of the input device by an operator An optical power supply system. The optical power feeding system according to claim 2,
Each of the one or more slave units includes a terminal for connecting a control terminal unit or an external terminal device, generates the uplink control command according to an operation of the control terminal by an operator, transmits the command to the master unit, and displays a display device And is configured to present information to the operator,
The first slave unit generates the operation confirmation command in response to an operation of the first control terminal by a first operator, transmits the command to the master unit, and the operation state information of the first slave unit or An optical power feeding system configured to display connection state information with the base unit to the first operator at a first control terminal. The optical power feeding system according to claim 2,
The master unit is configured to transmit a status check command to other slave units other than the first slave unit after receiving the operation check command and turning on optical power feeding.
Upon receiving the status confirmation command, the other slave unit is configured to transmit its own operation state information or connection state information to the master unit,
The optical power feeding system, wherein the master unit is configured to transmit the received operation status information or connection status information of the other slave unit to the first slave unit. The optical power feeding system according to claim 7,
Each of the one or more slave units includes an external control terminal unit or a connection port of the terminal device, generates the uplink control command according to an operation of the terminal device by an operator, and transmits the uplink control command to the master unit. Configured to present information to the operator;
The first slave unit transmits the operation confirmation command to the master unit in response to an operation of the first terminal device by a first operator, and operation status information or connection status information of the one or more slave units An optical power feeding system configured to display the first operator on the first terminal device. The optical power feeding system according to claim 2,
The operation check end command transmitted from the first slave unit includes success / failure information of the operation check of the first slave unit,
The base unit is
In response to the operation confirmation end command, the optical power supply to the one or more slave units is turned off,
An optical power feeding system configured to assign a unique number to the first slave unit when the success / failure information indicates success of the operation check. The optical power feeding system according to claim 1,
Each of the one or more slave units includes a slave unit memory and a slave unit processor that operates according to a program stored in the slave unit memory,
The parent device includes a parent device memory and a parent processor that operates according to a program stored in the parent device memory,
The slave processor transmits the uplink control command to the master,
The optical power supply system, wherein the master processor turns on or off optical power supply to the one or more slave devices in accordance with the uplink control command.

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