Remote anemometer inspection system

Abstract

To provide a remotely inspectable anemometer that can reduce labor required for inspection and allows workers to avoid work in a dangerous place.SOLUTION: An anemometer includes a rotor (13) that is fixed to an end portion of a rotating shaft and rotates in one direction receiving wind and an encoder for generating a signal corresponding to rotational speed of the rotating shaft of the rotor, and can transmit rotation information on the rotor based on the action of the encoder to the outside. The anemometer is provided with: a motor (62) for forcibly rotating the rotating shaft; a one-way clutch (64) capable of transmitting a rotation in the same direction as a rotating direction of the rotor to the rotating shaft, among rotations of the motor, and incapable of transmitting a rotation in the direction opposite to the rotating direction of the rotor to the rotating shaft; control means (50) for controlling the rotation of the motor; and signal receiving means (15B) for receiving a command signal from the outside. The control means is configured to rotate the motor at a speed specified by the command signal received by the signal receiving means.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a remotely inspectable anemometer having a motor connected to a rotating shaft of a rotor via a one-way clutch, and to a remote inspection system for anemometers. [Background technology]

[0002] Conventionally, a known wind speed monitoring system used for controlling the operation of transportation such as railways includes an anemometer having a rotor that rotates when exposed to wind, and a monitoring device that calculates and outputs a wind speed value based on the rotational speed of the rotor. In general, anemometers and monitoring devices are often installed at separate locations. For example, in a wind speed monitoring system used for railway operation control, anemometers are installed near riverbanks or tunnel exits, and monitoring devices are installed in equipment rooms at each station (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-185411 [Patent Document 2] Japanese Patent Application Publication No. 10-227810 Summary of the Invention [Problem to be solved by the invention]

[0004] In wind speed monitoring systems used to control railway operations, anemometers are inspected periodically. However, conventional anemometer inspections require multiple inspectors to visit the site where the anemometer is installed, remove the anemometer cup, output wind speed values using an anemometer tester, and transmit the values via cable to the control room. This requires a lot of labor and involves complex procedures. Furthermore, since the measurements must be confirmed while communicating with the information control center (controller), the test takes a long time to complete. Furthermore, anemometers are sometimes installed on bridges, and the conventional inspection method requires inspections in dangerous locations, such as on the bridge.

[0005] Incidentally, an invention relating to an anemometer testing device is described, for example, in Patent Document 2. The testing device in Patent Document 2 forcibly rotates the rotating shaft of a propeller, which rotates when exposed to wind, with a built-in motor, and the measurement signal generated at that time is monitored by a remote monitoring device. Although this is similar to the present invention in that the rotating shaft is forcibly rotated with a motor, the invention in Patent Document 2 still requires a lot of labor during inspection, as the testing device with a built-in motor must be transported to the site where the anemometer is installed, and a coupling attached to the rotating shaft of the motor must be engaged with the propeller to rotate it.

[0006] The present invention has been made in light of the above-mentioned problems, and its object is to provide an anemometer and a remote anemometer inspection system that can be remotely inspected, which can reduce the labor required for inspection and avoid working in dangerous locations. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides: An anemometer comprising: a rotor fixed to the end of a rotating shaft that rotates in one direction when exposed to wind; and an encoder for generating a signal corresponding to the rotation speed of the rotating shaft of the rotor; and capable of transmitting rotation information of the rotor based on the action of the encoder to an external device. and, a repeater to which the ends of a pair of optical fibers are connected; an inspection device connected to the repeater via an optical fiber cable; Anemometer with Remote inspection system And, The anemometer is a motor for forcibly rotating the rotary shaft; a one-way clutch that can transmit to the rotary shaft a rotation of the motor in the same direction as the rotation direction of the rotor, but cannot transmit to the rotary shaft a rotation in the opposite direction to the rotation direction of the rotor; a control means for controlling the rotation of the motor; signal receiving means for receiving a command signal from an external device; The control means is configured to rotate the motor at a speed designated by the command signal received by the signal receiving means. 、 the encoder is a disk-shaped rotary encoder having a plurality of slits formed at predetermined intervals along the circumferential edge thereof, the pair of optical fibers are arranged at a position corresponding to the slit so that other end portions thereof face each other with the disk-shaped rotary encoder interposed therebetween, the inspection device has a function of transmitting continuous light to the optical fiber cable, the continuous light being supplied to the optical fiber provided corresponding to the rotary encoder, superimposing command information related to the rotation of the motor on the transmitted continuous light, and receiving pulsed light returned from the anemometer via the optical fiber cable to detect wind speed; The repeater includes an optical branching means for branching the light transmitted from the inspection device, and has a function of transmitting a part of the light branched by the optical branching means to one of the pair of optical fibers, and extracting command information superimposed on the transmitted light by the inspection device from the other part of the light branched by the optical branching means, and transmitting the command information to the control means as an electrical signal. It is structured as follows.

[0008] An anemometer having the above-described configuration Remote inspection system According to By installing the inspection device at a location away from where the anemometer is installed, the anemometer can be inspected remotely, reducing the labor required for inspection and avoiding work in dangerous locations. In addition, because the anemometer and repeater are connected by optical fiber, and the repeater and inspection device (wind speed alarm) are also connected by optical fiber cable, the anemometer can be inspected without being affected by electromagnetic noise. In addition, the anemometer The control means rotates the motor at a speed specified by an external command signal, and the rotor rotation information sent to the outside can be analyzed by the inspection device to determine whether the rotor is rotating correctly. Furthermore, by installing the inspection device in a location away from the anemometer, the anemometer can be inspected remotely, reducing the labor required for inspection and avoiding work in dangerous locations. Furthermore, the one-way clutch allows the anemometer to be inspected without affecting normal wind speed measurements.

[0009] Here, it is desirable to configure the device to have gear switching means including a drive gear that rotates following the rotation of the motor, a driven gear connected to the end of the rotating shaft, a pair of intermediate gears that can mesh with the drive gear and the driven gear, respectively, an operating piece that moves one of the pair of intermediate gears in the axial direction to engage or disengage the gear with the corresponding gear, and an actuator that operates the operating piece. According to this configuration, since the gear switching means is provided, even if a one-way clutch is provided, the rotation of the motor can be transmitted to the rotating shaft to rotate the rotor without going through the one-way clutch.

[0010] Further, preferably, the control means When the motor is rotated in the same direction as the rotation direction of the rotor, one of the pair of intermediate gears is disengaged from the corresponding gear; When the motor is rotated in the direction opposite to the rotation direction of the rotor, the actuator is controlled so that one of the pair of intermediate gears is brought into mesh with the corresponding gear. This allows the rotation of the motor to be transmitted to the rotor via a one-way clutch to inspect the rotation in the forward direction, and by switching gears with the gear switching means, the rotation of the motor can be transmitted to the rotating shaft without going through the one-way clutch, causing the rotor to rotate, so that inspections can be performed by rotating the rotor in the opposite direction to normal. [Effects of the Invention]

[0014] According to the present invention, there is no need for an inspector to go to the site where the anemometer is installed, which has the effect of reducing the labor required to inspect the anemometer and avoiding work in dangerous locations. [Brief explanation of the drawings]

[0015] [Figure 1]1 is a system configuration diagram showing an example of the configuration of a remote inspection system for an anemometer according to the present invention. [Figure 2] 1 is a front cross-sectional view showing an example of the internal structure of an anemometer according to an embodiment of the present invention. [Figure 3] 1 is a side cross-sectional view showing the internal structure of the anemometer according to the embodiment, in which the gears that transmit the rotation of the motor to the rotating shaft of the cup are disengaged. FIG. [Figure 4] FIG. 2 is a side cross-sectional view showing a state in which rotation transmission gears are engaged in the anemometer according to the embodiment. [Figure 5] 3 is a cross-sectional view showing the internal structure of the anemometer according to the embodiment, taken at a position different from that shown in FIG. 2. FIG. [Figure 6] 1 is a block diagram showing an example of the configuration of an anemometer, a repeater, and a wind speed alarm that constitute a remote inspection system for an anemometer according to an embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of an anemometer and a remote inspection system for the anemometer according to the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of an anemometer and its remote inspection system according to the present invention. As shown in Figure 1(A), the anemometer 10 comprises a bottle-shaped housing 11, a rotating shaft 12 arranged vertically inside the housing 11 with its upper end slightly protruding from the housing 11, a rotating body 13 having a plurality of support rods 13a (three in the figure) connected at their base ends to the rotating shaft 12 and extending radially outward with their tips facing outward, and cups 13b fixed to the tips of each support rod 13a, and a cylindrical base box 14 provided at the bottom of the housing 11 and containing inspection mechanisms such as a motor and a one-way clutch.

[0017] As will be explained in detail later, a rotary encoder (hereinafter simply referred to as the encoder) for detecting the rotation speed of the rotating shaft 12 is provided inside the housing 11, and a motor for forcibly rotating the rotating shaft 12 for inspection purposes, a one-way clutch for transmitting the rotation of the motor to the rotating shaft during inspection and for preventing the rotation of the wind cup due to wind from being affected, i.e., wind speed detection during normal times, is provided inside the base box 14. In addition, a waterproof optical connector 15A is provided at the bottom of the housing 11 for connecting the end of an optical fiber that inputs and outputs light for wind speed detection in correspondence with the encoder, and a waterproof electrical connector 15B is provided in the base box 14 for connecting the end of a metal cable for supplying signals and power in correspondence with electrical components such as a motor.

[0018] Fig. 1(B) shows an example of the configuration of a remote inspection system to which the anemometer of the above embodiment is applied. The remote inspection system shown in Fig. 1(B) also functions as a wind speed monitoring system under normal conditions. In the system of this embodiment, although not limited to this, a set of two anemometers 10A and 10B are installed in one location. In order to avoid the possibility of accurate wind speed measurement being hindered by the many obstacles such as vegetation near the ground surface, an installation stand 17 made of steel pipe or the like and having a predetermined height is provided, and anemometers 10A and 10B are installed on this installation stand 17.

[0019] Also installed near the installation stand 17 are a power supply unit 18 made up of a solar panel and battery that supplies power to the motors and other electrical components built into the anemometers 10A and 10B, and a signal repeater 20. This repeater 20 is connected to a wind speed alarm 30 installed in a signal box, equipment room, etc. by an optical fiber cable 19 to prevent the alarm from being affected by electromagnetic noise. Meanwhile, the wind speed alarm 30 is connected to an IP (Internet Protocol) network communication device 41 such as an IP router by a metal cable 42 for electrical signals.

[0020] Furthermore, the wind speed alarm 30 is connected to a control room computer 43 that monitors the anemometer from a remote location via a disaster prevention information system network 44, and the IP network communication device 41 is connected to the computer 43 via an IP network 45. In conventional wind speed monitoring systems, the anemometer 10 and the wind speed alarm 30 are connected by a metal cable, which makes them susceptible to the effects of electromagnetic noise, but in the system of this embodiment, the anemometer 10 and the wind speed alarm 30 are connected by an optical fiber cable 19, which makes it less susceptible to the effects of electromagnetic noise. The anemometer 10 and the wind speed alarm 30 may be connected in a 1:1 ratio, or multiple anemometers 10 may be connected to one wind speed alarm 30.

[0021] As will be described in detail later, the wind speed alarm 30 has functions such as a calculation processing unit that calculates the rotational speed of the wind cup, i.e., the wind speed, by calculation based on the optical signals received from the anemometers 10A and 10B via the repeater 20, a wind speed value output unit that outputs the calculated wind speed value, an alarm output unit consisting of a buzzer that issues an alarm when the wind speed exceeds a predetermined value, and a communication unit that communicates with the computer 43 in the control room. In addition, the disaster prevention information system is an existing system that constantly collects and monitors data from meteorological observation equipment such as water level gauges, seismometers, rain gauges, anemometers, and rail temperature gauges placed along railway lines, and issues alerts in the event of abnormalities, with wind speed being one of the items monitored.

[0022] Next, a specific example of the internal structure of the anemometer of this embodiment will be described with reference to Figures 2 to 5. Note that in Figure 2, for convenience of illustration, the cup 13b is omitted. 2, an anemometer 10 of this embodiment has a base box 14 attached to the bottom of a housing 11 that supports a rotor 13 equipped with a cup, and a rotating shaft 12 of the cup protrudes into the base box 14 through an opening in a base portion 11a of the housing 11. A large diameter portion 12a is formed at the lower end of the rotating shaft 12, and a driven gear 61B is fixed to this large diameter portion 12a. A disc-shaped rotary encoder E, which has a plurality of slits formed on its periphery at equal intervals along the circumferential direction, is fixed to a position slightly above the large diameter portion 12a of the rotating shaft 12.

[0023] A base 14a is provided within the base box 14, and a motor 62 is housed in the center of the base 14a with its rotating shaft facing upward. A drive gear 61A is fixed to an auxiliary shaft 63 connected to the rotating shaft of the motor 62. A one-way clutch 64 is interposed between the tip (upper end in the figure) of the auxiliary shaft 63 and the end (lower end) of the rotating shaft 12 of the cup 13b. This one-way clutch 64 transmits torque when the rotating shaft of the motor 62 rotates in the forward direction of the cup 13b, but rotates freely when the rotating shaft of the motor 62 rotates in the opposite direction to the forward direction of the cup 13b, so as not to transmit torque. Although not particularly limited, the drive gear 61A and driven gear 61B are made of nylon.

[0024] A solenoid 65 is housed in a vertical position on the side of the motor 62 of the base portion 14a, and a plunger 65a of this solenoid 65 has an upper end to which an operating piece 66 extending in the horizontal direction is connected. 3, a support shaft 67 is disposed vertically in the hollow space above the base portion 14a in parallel with the solenoid 65. This support shaft 67 is rotatably supported, and a pair of intermediate gears 68A, 68B are fixed to the outer periphery of the support shaft 67. Of the intermediate gears 68A, 68B, the lower gear 68A cannot move in the vertical direction and is always in mesh with the drive gear 61A, while the upper gear 68B can move in the vertical direction and its position and size are set so that it meshes with the driven gear 61B when it moves upward.

[0025] Furthermore, a hole having a diameter slightly larger than that of the support shaft 67 is formed at the tip of the operating piece 66, and the length and extension direction of the operating piece 66 are set so that the support shaft 67 passes through this hole, as shown in Figure 4. When the solenoid 65 is excited, the plunger 65a and operating piece 66 move upward, and as shown in Figure 5, the intermediate gear 68B is raised by the operating piece 66 and engages with the driven gear 61B at the lower end of the rotating shaft 12, transmitting the rotational force of the motor 62 to the rotating shaft 12 of the cup via the drive gear 61A and intermediate gears 68A, 68B.

[0026] In addition, the lower end of a hook-shaped push-down piece 69 that protrudes upward is fixed to the middle part of the operating piece 66, and a pressing portion 69a that extends toward the support shaft 67 is formed at the upper end of the push-down piece 69, so that when the solenoid 65 is demagnetized and the plunger 65a and operating piece 66 move downward, the pressing portion 69a abuts against the upper surface of the intermediate gear 68B and presses it down, thereby disengaging it from gear 68B. When the solenoid 65 is demagnetized, the plunger 65a and the operating piece 66 are moved downward, and when the operating piece 66 and the pressing piece 69 lower the intermediate gear 68B, as shown in Figure 4, the intermediate gear 68B is disengaged from the driven gear 61B at the lower end of the rotating shaft 12, and the rotational force of the motor 62 cannot be transmitted to the rotating shaft 12.

[0027] Figure 6 shows a specific example of the configuration of the control unit 50 built into the base box 14 of the anemometer 10 in Figure 1, the repeater 20 provided near the anemometer 10, and the wind speed alarm 30 connected to the repeater 20 via an optical fiber cable 19. Figure 6 also shows a motor M whose rotation is controlled by the control unit 50 and which forcibly rotates the rotating shaft 12 of the anemometer 10, and an encoder E which is sent from the repeater 20 and input via an optical fiber F1. Note that Figure 6 does not show the wind cup which rotates when it receives wind, the one-way clutch, and the gear switching mechanism (gears, solenoids, etc.).

[0028] 6, an end of an input-side optical fiber F1 is disposed opposite the upper surface of the peripheral edge of a disk-shaped encoder E fixed to the rotating shaft 12. An output-side optical fiber F2 is disposed at a position opposite the optical fiber F1, sandwiching the encoder E therebetween, and is configured so that continuous light input from the optical fiber F1 as the encoder E rotates is converted into pulsed light by a slit and returned to the repeater 20 via the optical fiber F2.

[0029] The control unit 50 built into the base box 14 includes a driver 51 that drives the motor M that rotates the rotating shaft 12, an RS232C port 52 that receives command code signals supplied from the repeater 20 via the metal cable 16 for electrical signals, a microprocessor (CPU) 53 that decodes the received command code, a controller 54 that receives a rotation speed command output according to the decoding result by the CPU 53, generates a drive signal for the driver 51, and controls the rotation of the motor M at the specified speed, and a DC power supply 55.

[0030] The repeater 20 is equipped with an optical coupler 21 that receives the continuous light transmitted from the wind speed warning device 30 via the optical fiber cable 19 and transmits a portion of it via the optical fiber F1 to the encoder E of the anemometer 10, a photodetector 22 such as a photodiode that receives the light branched by the optical coupler 21 and converts it into current, an IV conversion circuit 23 that converts the converted current into voltage, a signal generation circuit 24 that extracts the command code contained in the received light from the converted voltage signal and generates a signal conforming to the RS232C standard for serial communication, and an RS232C port 25 that outputs the generated signal to the electrical signal cable 16. The repeater 20 also has an optical connector 26A for connecting the optical fibers F1 and F2, an electrical connector 26B for connecting the end of the metal cable 16 for electrical signals, a light guide path 27 for transmitting pulsed light returned from the encoder E of the anemometer 10 via the optical fiber F2 to the wind speed warning device 30 via the optical fiber cable 19, a power supply terminal 28 for receiving power from the power supply unit 18, and a DC-DC converter 29 as a DC power supply.

[0031] The wind speed warning device 30 includes a light source 31 such as a semiconductor laser (LD) that generates continuous light to be sent to the repeater 20 via the optical fiber cable 19, a modulation circuit 32 that modulates the continuous light sent from the light emitting diode in accordance with the codes of a rotation speed command that instructs the motor rotation speed and a command that indicates the rotation direction to be sent to the anemometer 10, an optical fiber F3, a light guide path 27 in the repeater 20, and a photodetector 33 that receives pulsed light returned from the encoder E of the anemometer 10 via the optical fiber F3, the light guide path 27 in the repeater 20, and the optical fiber cable 19, a photoelectric conversion circuit 34 that converts the received pulsed light into an electrical signal, an arithmetic and control unit 35 that calculates the wind speed based on the converted signal and controls the light source 31 and the modulation circuit 32, a wind speed value output unit 36 that outputs the calculated wind speed value, and an alarm output unit 37 that generates and outputs an alarm signal if the calculated wind speed exceeds a predetermined value.

[0032] Of these, the calculation control unit 35 is composed of a CPU or the like, and counts the number of pulses of light received by a photoreceiver per unit time, for example, and converts the counted number of pulses into a wind speed value using a calculation formula or the like stored in advance in an internal memory. Although not particularly limited, in this embodiment, commands that the wind speed alarm 30 issues to the control unit 50 of the anemometer 10 include, for example, commands to rotate the motor in the same direction as the rotation direction of the cup at rotation speeds corresponding to wind speeds of 1 m / s, 2 m / s, 4 m / s, 8 m / s, 10 m / s, 20 m / s, and 40 m / s. A command is also provided to issue an instruction to rotate the anemometer 10 in the opposite direction to the rotation direction of the cup at a slower speed.

[0033] A command to rotate the motor in the reverse direction is sent from the wind speed alarm 30 via the repeater 20 to the control unit 50 of the anemometer 10, and when the control unit 50 of the anemometer 10 receives the command, the solenoid that switches gears is excited, the gears are switched, and the motor rotates the rotating shaft at a predetermined speed in the direction opposite to the rotation of the cup. Note that by switching gears, the rotating shaft can be rotated in the reverse direction even if there is a forward one-way clutch between the motor and the rotating shaft.

[0034] When inspecting an anemometer using the anemometer inspection system of this embodiment, the wind speed alarm 30 sends a continuous light beam to the optical fiber cable 19 while transmitting a command to the anemometer 10 via the repeater 20 to cause the motor to rotate the rotating shaft in the forward direction at a wind speed of, for example, 1 m / s. The wind speed alarm 30 then detects the pulsed light returning via the repeater 20 and the optical fiber cable 19, calculates the wind speed value of the anemometer 10 based on the detected pulsed light, and outputs the result from the wind speed value output unit. If the calculated wind speed value does not match the wind speed value specified in the transmitted command, the wind speed alarm 30 outputs an inspection result indicating an abnormality. The command is then changed to rotate the rotating shaft of the anemometer 10, and the calculation and determination of the wind speed value are repeated in the same manner as above.

[0035] The wind speed alarm 30 of this embodiment is provided with communication ports 38A, 38B for communicating with the network communication device 41 and the control room computer 43 (Fig. 1), and is also provided with a terminal 39 for connecting an IP personal computer, so that when a command is input to the wind speed alarm 30 by operating a connected personal computer, the control section of the wind speed alarm 30 controls the internal circuitry to send an inspection command to the anemometer 10 and execute the inspection process. The wind speed alarm 30 is also configured so that an anemometer inspection command can be sent from the control room computer 43 via the network 44 or 45 to the wind speed alarm 30, causing the above inspection process to be executed.

[0036] As described above, according to the anemometer inspection system of the above embodiment, inspection of an anemometer 10 can be carried out remotely by issuing an inspection command from a wind speed alarm 30 or a control room located in a remote location, without the need for workers to go to the site where the anemometer 10 is installed, which significantly reduces the labor required for the inspection, and since no work is required at the site where the anemometer 10 is installed, the inspection of each anemometer can be completed in a short time. Furthermore, if the weather or other conditions at the installation site of the anemometer to be inspected are bad on the scheduled date and time of the inspection, the scheduled inspection can be easily canceled without any impact on other departments.

[0037] Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments. For example, although the embodiments have been described in which the present invention is applied to a cup-type anemometer, the present invention can also be applied to an anemometer having a propeller-type rotor. Also, in the above embodiment, the repeater 20 and the wind speed warning device 30 are connected by an optical fiber cable 19, but they may be connected by an electric signal cable, or it is also possible to omit the repeater 20. Furthermore, in the above embodiment, the power supply device 18 equipped with a solar panel is installed near the anemometer, but instead of providing a power supply device, it is also possible to configure it so that power is supplied using a cable. [Explanation of symbols]

[0038] 10 Anemometer 11. Housing 12 Rotation axis 13 Rotating body 13a Support rod 13b Wind cup 14 Base box 15A optical connector 15B Electrical Connector 16 Metal cables for electrical signals 17 Installation stand 18 Power supply (solar panel, battery) 19 Fiber Optic Cable 20 Repeater 26A Optical Connector 26B Electrical Connector 30 Wind speed alarm (testing device) 41 IP network communication equipment 42 Metal Cable 43 Control Room Computer 44 Disaster Prevention Information System Network 45 IP Networks 50 Anemometer control unit 51 Driver 52 RS232C ports 53 Microprocessor (CPU) 54 Controller 55 DC power supply 61A Drive gear 61B Driven gear 62 Motor 63 Auxiliary shaft 64 One-way clutch 65 Solenoid 66 Actuating piece 67 Support shaft 68A, 68B Intermediate gear 69 Push-in piece F1.F2 optical fiber

Claims

1. an anemometer including a rotor fixed to an end of a rotating shaft and rotating in one direction when exposed to wind, and an encoder for generating a signal corresponding to the rotation speed of the rotating shaft of the rotor, the anemometer being capable of transmitting rotation information of the rotor based on the action of the encoder to an external device; a repeater to which the ends of a pair of optical fibers are connected; an inspection device connected to the repeater via an optical fiber cable; A remote inspection system for an anemometer, comprising: The anemometer is a motor for forcibly rotating the rotary shaft; a one-way clutch that can transmit to the rotary shaft a rotation of the motor in the same direction as the rotation direction of the rotor, but cannot transmit to the rotary shaft a rotation in the opposite direction to the rotation direction of the rotor; a control means for controlling the rotation of the motor; signal receiving means for receiving a command signal from an external device; the control means is configured to rotate the motor at a speed designated by the command signal received by the signal receiving means; the encoder is a disk-shaped rotary encoder having a plurality of slits formed at predetermined intervals along the circumferential edge thereof, the pair of optical fibers are arranged at a position corresponding to the slit so that other end portions thereof face each other with the disk-shaped rotary encoder interposed therebetween, the inspection device has a function of transmitting continuous light to the optical fiber cable, the continuous light being supplied to the optical fiber provided corresponding to the rotary encoder, superimposing command information related to the rotation of the motor on the transmitted continuous light, and receiving pulsed light returned from the anemometer via the optical fiber cable to detect wind speed; a repeater including an optical branching means for branching the light transmitted from the inspection device, and a function of transmitting a portion of the light branched by the optical branching means to one of the pair of optical fibers, and extracting command information superimposed on the transmitted light by the inspection device from the other portion of the light branched by the optical branching means, and transmitting the command information to the control means as an electrical signal.

2. 2. The remote inspection system for an anemometer according to claim 1, further comprising gear switching means including: a drive gear that rotates following the rotation of the motor; a driven gear connected to an end of the rotary shaft; a pair of intermediate gears that can mesh with the drive gear and the driven gear, respectively; an operating piece that moves one of the pair of intermediate gears in the axial direction to engage or disengage the corresponding gear; and an actuator that operates the operating piece.

3. The control means When the motor is rotated in the same direction as the rotation direction of the rotor, one of the pair of intermediate gears is disengaged from the corresponding gear; 3. The remote inspection system for an anemometer according to claim 2, wherein when the motor is rotated in a direction opposite to the rotation direction of the rotor, the actuator is controlled so that one of the pair of intermediate gears is meshed with the corresponding gear.

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