JP2021139782A - Water immersion determination device of air-break switch, and water immersion determination method - Google Patents

Abstract

To provide a water immersion determination device capable of allowing a worker on the ground to detect the temperature of the bottom of the air-break switch in a non-contact manner to easily determine whether or not water immerse inside the air-break switch.SOLUTION: The water immersion determination device of an air-break switch is a device for determining whether or not water immerse inside the air-break switch installed on the pillar. The device includes: a laser irradiator that irradiates a laser to the bottom of the air-break switch for determining whether or not water immerse inside the air-break switch; and a determination unit that determines whether or not water immerse inside the air-break switch based on the temperature at the laser irradiation position in the bottom.SELECTED DRAWING: Figure 5

Description

The present invention relates to an inundation determination device and an inundation determination method for an air switch.

For example, in order to change the flow of electricity in a distribution line or to construct a power failure section during a power outage construction, the distribution line is connected to or cut off in the air (for example, an aerial switch (for example). High-voltage aerial switch) is installed.

The aerial switch is configured to be airtight so that parts such as a charging part inside the aerial switch are not affected by factors outside the aerial switch (wind, rain, humidity, ultraviolet rays, etc.). However, if the packing used for the aerial switch is cracked due to aged deterioration, rainwater may enter the inside of the aerial switch through the packing. Once rainwater enters the inside of the aerial switch, a short circuit may occur due to the contact of the charging part inside the aerial switch with the rainwater, which may lead to a power failure accident of the distribution line. To prevent such a power outage, it is desirable to periodically check whether the inside of the aerial switch is flooded, but the aerial switch has a structure in which the charging part is covered with a metal housing. Therefore, it is not easy to check the inside of the aerial switch from the outside.

Therefore, as an apparatus for confirming the presence or absence of inundation inside the air switch, for example, an inundation determination device as described in Patent Document 1 has been proposed.

The inundation determination device of Patent Document 1 uses a temperature sensor to measure the temperature of the bottom surface when the bottom surface of the switch is heated by the heater in a state where the exposed surface of the heater and the temperature sensor is in contact with the bottom surface of the switch. It is a device that detects and determines the presence or absence of inundation inside the switch from the temperature detection result using the principle of thermal conductivity.

Japanese Unexamined Patent Publication No. 2011-89807

However, when determining the presence or absence of inundation inside the switch using the device of Patent Document 1, the worker goes up to the aerial work platform and fixes the inundation determination device to the bottom surface of the switch using a tool such as a yatko. In addition, a temperature detection result of at least several minutes is required to determine the presence or absence of flooding inside the switch. As described above, it takes a huge amount of labor and time to inspect the presence or absence of flooding of one switch, and it cannot be said that the inspection work is efficient.

Therefore, the present invention detects the temperature of the bottom surface of the aerial switch in a non-contact manner while the worker is on the ground, and can easily remotely determine whether or not the inside of the aerial switch is flooded. It is an object of the present invention to provide an inundation determination device capable of the above.

The main invention for solving the above-mentioned problems is an inundation determination device for an aerial switch that determines the presence or absence of inundation inside an aerial switch installed on a pillar, and is provided on the bottom surface of the aerial switch. On the other hand, a laser irradiator that irradiates a laser for determining whether or not the inside of the aerial switch is flooded, and the aerial switch based on the temperature of the laser irradiation position on the bottom surface. It is provided with a determination device for determining whether or not the inside of the laser is flooded.
Other features of the invention will become apparent with reference to the accompanying drawings and the description herein.

According to the present invention, it is possible to remotely detect whether or not the inside of the air switch is flooded by detecting the temperature of the bottom surface of the air switch in a non-contact manner while the worker is on the ground. Is possible.

It is a schematic diagram for demonstrating the method of determining the presence or absence of flooding of an aerial switch which concerns on this embodiment. It is a figure which shows an example of the function of the laser irradiator used in the inundation determination apparatus which concerns on this embodiment. It is a figure which shows an example of the function of the determination apparatus used in the inundation determination apparatus which concerns on this embodiment. It is a figure which shows the display example of the display of an infrared thermograph. It is a flowchart which shows an example of the operation of the determination apparatus which constitutes the inundation determination apparatus which concerns on this embodiment.

The description of this specification and the accompanying drawings will clarify at least the following matters.

=== Method for determining the presence or absence of flooding in the aerial switch ===
FIG. 1 is a schematic view for explaining a method of determining whether or not the air switch according to the present embodiment is flooded.

In FIG. 1, the aerial switch 100 is installed at a high position of the utility pole 200 (for example, at a position of about 10 m from the ground), for example, to change the flow of electricity in the distribution line 210, or to perform a power failure section during power failure construction. It is a power device that connects or disconnects the distribution line 210 in the air in order to construct the power distribution line 210. For example, when the aerial switch 100 is a high-voltage aerial switch, the high-voltage aerial switch can connect or cut off the position of the demarcation point of responsibility between the electric power company and the consumer on the distribution line 210. It is installed in.

The aerial switch 100 has a charging unit 110 for connecting or disconnecting the distribution line 210 on the upstream side (for example, the electric power company side) and the distribution line 210 on the downstream side (for example, the consumer side). .. The charging unit 110 is sealed inside the metal housing 120 constituting the aerial switch 100 so as not to be deteriorated by the influence of external factors (wind, rain, humidity, ultraviolet rays, etc.). It is housed in. However, the packing (not shown) used to ensure the airtightness inside the air switch 100 is often exposed from the air switch 100, and is therefore affected by the above external factors. It deteriorates over time. If the deterioration of the packing progresses beyond a certain level, the airtightness of the air switch 100 cannot be ensured, and rain, moisture, or the like invades the inside of the air switch 100 through the packing. In this way, if the aerial switch 100 is flooded, water may collect at the bottom of the housing 120 and come into contact with the charging unit 110 housed in the housing 120 to cause a short-circuit accident. Regular inspection work is required.

Since the housing 120 constituting the aerial switch 100 is made of metal, it is difficult to visually determine from the outside whether or not the aerial switch 100 is flooded. Therefore, as the above inspection work, the operator is forced to go up to the installation location of the aerial switch 100 and attach a water inundation determination device as shown in Patent Document 1 to the aerial switch 100. The current situation is that there is.

The present embodiment provides a method capable of easily determining whether or not the aerial switch 100 is flooded in a relatively short time while the operator is on the ground. ..

In the present embodiment, the laser irradiator 300 and the determination device 400 are used as means for realizing this method.

The laser irradiator 300 irradiates the bottom surface 130 on the outside of the air switch 100 with a laser for determining whether or not the air switch 100 is flooded. The laser irradiator 300 is installed on the ground so that the laser emission port faces the outer bottom surface 130 of the aerial switch 100. In this embodiment, a fiber laser is used as an example of this laser, and a specific description of the laser irradiator 300 will be described later.

The determination device 400 detects the infrared radiant energy appearing on the bottom surface 130 when the fiber laser is irradiating the bottom surface 130 of the aerial switch 100 and converts it into an apparent temperature, and the irradiation position of the fiber laser on the bottom surface 130. In relation to the apparent temperature of the above and a predetermined temperature, it is determined whether or not the inside of the air switch 100 is flooded. A specific description of the determination device 400 will be described later.

In this way, the laser irradiator 300 is installed on the ground, and the temperature of the bottom surface 130 when the fiber laser is irradiating the bottom surface 130 of the aerial switch 100 by the determination device 400 is the infrared radiant energy appearing on the bottom surface 130. Non-contact detection is performed by converting to an apparent temperature, and it is determined whether or not the inside of the aerial switch 100 is flooded depending on whether or not the apparent temperature exceeds a predetermined temperature. .. Therefore, the operator does not have to go up to the high place where the aerial switch 100 is installed in order to determine whether or not the inside of the aerial switch 100 is flooded, and it is relatively short safely. It is possible to carry out inspection work in time.
=== Inundation judgment device ===

<Laser irradiator>
FIG. 2 is a diagram showing an example of the function of the laser irradiator used in the inundation determination device according to the present embodiment.

In FIG. 2, the laser irradiator 300 outputs a fiber laser having a near-infrared wavelength (for example, 1064 nm) as a laser to irradiate the bottom surface 130 of the air switch 100.

The laser irradiator 300 includes an excitation unit 310, a resonator unit 320, an exit port 330, and a leg unit 340 as means for emitting a fiber laser.

The excitation unit 310 is excited by a plurality of excitation semiconductor lasers 311 and an excitation combiner 313 in which lasers (wavelengths of about 0.9 μm) output from the plurality of semiconductor lasers 311 are propagated via the optical fiber 312, respectively. It is configured to include an optical fiber 314 in which a plurality of lasers propagated to the combiner 313 are output as excitation light in a unified state.

The resonator unit 320 amplifies the excitation light output from the optical fiber 314 of the excitation unit 310 and outputs it as a fiber laser. The resonator unit 320 includes a high reflectance mirror 321, an amplification fiber 322, and a low reflectance mirror 323 as means for amplifying and outputting the excitation light as a fiber laser. Here, the fiber laser is a kind of solid-state laser using an optical fiber as an amplification medium. The core of the amplification fiber 322 is doped with the rare earth element Yb (ytterbium) so that the refractive index at the center of the optical fiber is the highest. The excitation light output from the excitation unit 310 excites Yb doped in the core in the amplification fiber 322 after being amplified by the high reflectance mirror 321 and further amplified by the low reflectance mirror 323, and is further amplified by the low reflectance mirror 323 to be amplified by the fiber laser. Is oscillated and output as.

Since the fiber laser is propagated through the amplification fiber 322, it has the advantages of high energy conversion efficiency and a long focal length design. Therefore, in the present embodiment, considering that the irradiation distance to the bottom surface 130 of the aerial switch 100 is as long as about 10 m, the bottom surface 130 is irradiated with the fiber laser from the laser irradiator 300.

The leg portion 340 has a structure similar to that of a well-known camera tripod, and the length of each leg can be adjusted. The laser irradiator 300 is supported by the leg portion 340, and by adjusting the length of each leg of the leg portion 340, the outlet 330 thereof faces the direction of the bottom surface 130 of the aerial switch 100. This makes it possible to reliably irradiate the bottom surface 130 of the air switch 100 with the fiber laser through the outlet 330. The leg 340 is an example of a structure that supports the laser irradiator 300, and may have any structure as long as the exit port 330 can be adjusted so as to face the bottom surface 130.

When the laser irradiator 300 is installed on the ground, there is a risk that the operator may accidentally come into contact with the laser irradiator 300 and overturn the laser irradiator 300. At this time, it is necessary to avoid irradiating the human body with the fiber laser. Therefore, the laser irradiator 300 is further provided with an acceleration sensor and an inclination sensor (both not shown), and while the fiber laser is irradiating the bottom surface 130 of the aerial switch 100, these sensors are used as the laser irradiator. When the movement of 300 is detected, the emission operation of the fiber laser by the laser irradiator 300 may be stopped.

The air switch 100 is coated on the outer peripheral surface including the housing 120 in order to suppress deterioration from external factors. The output of the fiber laser when irradiating the bottom surface 130 of the aerial switch 100 needs to be suppressed to a size that does not damage the coating. The applicant prepares a switch sample (new product, deteriorated product without rust, deteriorated product with rust, etc.) having the same specifications as the air switch 100, and keeps a distance of about 10 m from the laser irradiator 300. We conducted an experiment to irradiate while changing the output of the fiber laser. As a result, it was found that about 20 W is sufficient for the output of the fiber laser to determine the presence or absence of flooding in the air switch 100. Therefore, the output of the fiber laser output from the laser irradiator 300 will be, for example, 20 W in the following description.

The applicant also conducted an experiment on whether or not the reflected light when the bottom surface 130 of the aerial switch 100 is irradiated with the fiber laser may affect the human body. For example, as a test piece sample corresponding to the bottom surface 30 of the aerial switch 100, a new product (sample 1), a deteriorated product without rust (sample 2), and a deteriorated product with rust (sample 3) are prepared, and each test is performed. One sample was irradiated with a fiber laser (for example, 21.95 W) under the conditions of an irradiation distance of 1 m, an irradiation angle of 10 degrees, 30 degrees, and 45 degrees. The measurement results of the reflected light at that time are shown in the table below. Here, the irradiation angle means an angle inclined from a virtual line perpendicular to the test piece sample. That is, the smaller the tilt angle, the higher the irradiation intensity of the fiber laser on the test piece sample. The reflected light of the fiber laser irradiated on the test piece sample can be measured by using, for example, a laser power meter manufactured by Ocean Photonics Co., Ltd.

Consider an irradiation angle of 10 degrees, which maximizes the irradiation intensity of the test piece sample. The intensity of the reflected light becomes smaller by a square of the irradiation distance as the irradiation distance becomes longer. Since the irradiation distance in the above experiment was 1 m, assuming that the irradiation distance is actually up to 10 m, the reflected light of sample 1 is 1.3 mW, the reflected light of sample 2 is 0.0034 mW, and the reflected light of sample 3. Is 0.0025 mW. As described above, the intensity of the reflected light is sufficiently smaller than the intensity of the ultraviolet rays outdoors, which is about 70 mW. From this experimental result, when the bottom surface 130 of the aerial switch 100 is irradiated with a 20 W fiber laser. It can be judged that the reflected light of the above does not adversely affect the human body.

<Judgment device>
FIG. 3 is a diagram showing an example of the function of the determination device used in the inundation determination device according to the present embodiment.

In FIG. 3, the determination device 400 detects the infrared radiation energy appearing on the bottom surface 130 when the fiber laser is irradiating the bottom surface 130 of the air switch 100 from the laser irradiator 300 and converts it into an apparent temperature. In relation to the apparent temperature of the irradiation position of the fiber laser on the bottom surface 130 and a predetermined temperature, it is determined whether or not the inside of the aerial switch 100 is flooded.

The determination device 400 includes an infrared thermograph 410, a determination unit 420, a storage unit 430, and a timer 440 as means for realizing the above functions.

The infrared thermograph 410 detects the infrared radiation energy appearing on the bottom surface 130 when the fiber laser is irradiating the bottom surface 130 of the aerial switch 100 from the laser irradiator 300 and converts it into an apparent temperature, for example, the bottom surface. The entire 130 is displayed on the display 411 as a temperature distribution map with a color corresponding to the apparent temperature. At this time, the information indicating the apparent temperature at the position where the fiber laser is irradiated on the bottom surface 130 is stored in the storage unit 430 while being sequentially updated. The operation of the infrared thermograph 410 is started, for example, by receiving an irradiation start signal generated when an operator operates an irradiation start button (not shown) provided on the laser irradiator 300. do. Further, a magnifying lens (for example, a 4x lens) is attached to the infrared thermograph 410 so that the temperature distribution of the bottom surface 130 of the aerial switch 100 can be detected in detail and the operator can easily grasp the state of the temperature distribution of the bottom surface 130. In the mounted state, the infrared radiant energy of the bottom surface 130 of the aerial switch 100 may be converted into an apparent temperature, and the state of the temperature distribution of the bottom surface 130 may be displayed on the display 411.

The timer 440 starts timing from a reset state, for example, triggered by the operation of the irradiation start button.

The applicant prepares a switch sample having the same specifications as the air switch 100, that is, a switch sample that is not flooded and a switch sample that is flooded (several mm to several cm). An experiment was conducted in which a 20 W fiber laser was irradiated from the laser irradiator 300 at a distance of about 10 m. As a result, it was found that when the bottom surface of the switch sample in the non-immersed state was irradiated with the fiber laser, the apparent temperature at the irradiation position of the fiber laser exceeded 140 ° C. within 1 minute from the start of irradiation. On the other hand, when the bottom surface of the flooded switch sample was irradiated with the fiber laser, it was found that the apparent temperature at the irradiation position of the fiber laser did not rise to 95 ° C. or higher even after 2 minutes from the start of irradiation.

According to this finding, the determination unit 420 acquires the time counting time of the timer 440 and the irradiation position of the fiber laser on the bottom surface 130 of the aerial switch 100 stored in the storage unit 430, triggered by the irradiation start signal. Information indicating the apparent temperature is acquired from the storage unit 430, and the apparent temperature exceeds 140 ° C. (first temperature) within 1 minute (1st hour), or 2 minutes (2nd hour) has passed. However, it is detected whether or not the temperature has risen above 95 ° C. (second temperature). Then, the determination unit 430 determines that the aerial switch 100 is not flooded when the apparent temperature exceeds 140 ° C. within 1 minute, while the temperature reaches 95 ° C. or higher even after 2 minutes have passed. If it does not rise, it is determined that the aerial switch 100 is flooded. The determination unit 420 includes a microcomputer, and the function of the determination unit 420 is realized by software processing by executing a program stored in the storage unit 430. Further, the above-mentioned first and second hours and the first and second temperatures are examples for explaining the present embodiment in an easy-to-understand manner, and are set to different values according to the specifications of the air switch 100. May be good. When the determination operation is completed, the determination unit 420 outputs a determination end signal, stops the operation of the timer 440, and resets the timer 440.

<Example of infrared thermograph display>
FIG. 4 is a diagram showing a display example of an infrared thermograph display. In particular, FIG. 4A shows an example of the temperature distribution of the entire bottom surface 130 when a 20 W fiber laser is irradiated from the laser irradiator 300 to a predetermined position on the bottom surface 130 when the air switch 100 is not flooded. Is shown. On the other hand, FIG. 4B shows an example of the temperature distribution of the entire bottom surface 130 when a 20 W fiber laser is irradiated from the laser irradiator 300 to a predetermined position on the bottom surface 130 when the air switch 100 is submerged. Is shown.

In FIG. 4A, the position of the cross mark is the irradiation position of the fiber laser, and the temperature at this position exceeds 140 ° C. within 1 minute from the start of irradiation. The "maximum 141.2" shown in the upper left of the display 411 is the temperature of the irradiation position of the fiber laser. From this state, the operator can visually grasp through the display 411 that the aerial switch 100 is not flooded.

Further, in FIG. 4B, the position of the cross mark is the irradiation position of the fiber laser, and it shows that the temperature at this position does not rise to 95 ° C. or higher even after 2 minutes have passed from the start of irradiation. .. The "maximum 92.1" shown in the upper left of the display 411 is the temperature of the irradiation position of the fiber laser. From this state, the operator can visually grasp that the aerial switch 100 is flooded through the display 411.

The outside air temperature is shown in the upper center of the display 411.
=== An example of the operation of the judgment unit ===

FIG. 5 is a flowchart showing an example of the operation of the determination device constituting the inundation determination device according to the present embodiment.

First, a position on the ground where a fiber laser can be irradiated is specified on the bottom surface 130 of the aerial switch 100 installed at a high position of the utility pole 200, and the laser irradiator 300 is installed at that position. At this time, the length of the leg portion 350 is adjusted so that the exit port 340 of the laser irradiator 300 faces the direction of the bottom surface 130 of the aerial switch 100. Further, the determination device 400 is installed at a position where the infrared radiant energy of the bottom surface 130 when the fiber laser is radiated to the bottom surface 130 of the air switch 100 can be converted into an apparent temperature. Then, when the operator operates the irradiation start button of the laser irradiator 300, the operation of determining the presence or absence of flooding of the aerial switch 100 is started.

When an irradiation start signal is generated in association with the operation of the irradiation start button (step S1: YES), the laser irradiator 300 emits a fiber laser from the outlet 340 triggered by the irradiation start signal, and the fiber laser is blown into the air. Irradiate the bottom surface 130 of the switch 100 (step S2).

Further, the determination device 400 receives the above irradiation start signal from the laser irradiator 300, and starts the determination operation triggered by this irradiation start signal (step S3).

Specifically, the infrared thermograph 410 converts the infrared radiant energy appearing on the bottom surface 130 of the aerial switch 100 into an apparent temperature at regular time intervals (for example, 1 second), and FIGS. 4 (A) and 4 (A) and 4 (FIG. 4) As shown in B), it is displayed on the display 411 as a temperature distribution map of the entire bottom surface 130. Further, information indicating the apparent temperature at the position where the fiber laser is irradiated on the bottom surface 130 of the aerial switch 100 is stored in the storage unit 430 while being sequentially updated through the determination unit 420.

The timer 440 is reset by the irradiation start signal to start timing, and outputs information indicating the timing time to the determination unit 420.

As a result, the determination unit 420 is at a position where the bottom surface 130 of the aerial switch 100 is irradiated with the fiber laser, which is sequentially updated and stored in the storage unit 430 in the process of elapse of the time counting by the timer 440. Monitor how the apparent temperature changes with respect to a predetermined temperature.

The determination unit 420 determines whether or not the time counting by the timer 440 has passed one minute (step S4).

When the time counting time of the timer 440 has not passed 1 minute (step S4: NO), the determination unit 420 appears at a position where the bottom surface 130 of the aerial switch 100 is irradiated with the fiber laser from the storage unit 430. The information indicating the temperature of the above is read out, and it is determined whether or not the apparent temperature exceeds 140 ° C. (step S5).

In step S5, if the apparent temperature does not exceed 140 ° C. (step S5: NO), the determination operations of steps S4 and S5 are repeatedly executed.

In step S5, when the apparent temperature exceeds 140 ° C. (step S5: YES), the determination unit 420 determines that the target air switch 100 irradiated with the fiber laser is not flooded (step S6). ).

On the other hand, when the time counting time of the timer 440 has passed 1 minute in step S4 without the apparent temperature in step S5 reaching 140 ° C. (step S4: YES), the aerial switch 100 is flooded in the determination unit 420. Therefore, it is determined whether or not the time counting time of the timer 440 has passed 2 minutes (step S7).

When the time counting time of the timer 440 has not passed 2 minutes (step S7: NO), the determination unit 420 indicates information indicating the apparent temperature at the position where the bottom surface 130 of the aerial switch 100 is irradiated with the fiber laser. Is read from the storage unit 430, and it is determined whether or not the apparent temperature exceeds 95 ° C. (step S8). In step S8, if the apparent temperature does not exceed 95 ° C. (step S8: NO), the determination operation of step S7 is executed again. On the other hand, in step S8, when the apparent temperature exceeds 95 ° C. even though 2 minutes have not passed since the start of the fiber laser irradiation (step S8: YES), the air switch 100 is normal. Assuming that there is a possibility that a problem other than flooding has occurred in the operation, a determination end signal is output in order to end the determination operation (step S9). On the other hand, when the time counting time of the timer 440 has passed 2 minutes (step S7: YES), the apparent position at the position where the fiber laser is irradiated on the bottom surface 130 of the aerial switch 100 is the same as the determination operation in step S8. Information indicating the temperature is read from the storage unit 430, and it is determined whether or not the apparent temperature exceeds 95 ° C. (step S10).

In step S10, when the apparent temperature exceeds 95 ° C. (step S10: YES), a determination end signal is output in the same manner as the determination in step S8: YES (step S9). On the other hand, in step S10, when the apparent temperature does not exceed 95 ° C. (step S10: NO), the determination unit 420 determines that the target aerial switch 100 irradiated with the fiber laser is flooded. (Step S9).

After determining in step S6 that the air switch 100 is not flooded or determining that the air switch 100 is flooded in step S11, the determination unit 420 outputs a determination end signal (step S9). ). With this determination end signal as a trigger, the laser irradiator 300 stops the emission of the fiber laser, the timer 440 stops the timing operation, and ends a series of operations related to the determination.

In the present embodiment, the presence or absence of water immersion in the air switch 100 is determined by irradiating one place on the bottom surface 130 of the air switch 100 with a fiber laser, but the present embodiment is not limited to this. No. For example, the air switch 100 is sequentially irradiated with fiber lasers at a plurality of different positions on the bottom surface 130 of the air switch 100, and the determination operation of FIG. 5 is executed for each of the plurality of irradiation positions of the fiber laser. The accuracy of the determination regarding the presence or absence of inundation may be increased. Further, in the present embodiment, a fiber laser is used to determine whether or not the air switch 100 is flooded, but the present invention is not limited to this. A solid-state laser other than the fiber laser may be adopted as long as it can be determined whether or not the air switch 100 is flooded, as in the present embodiment.
=== Summary ===

As described above, the inundation determination device for the aerial switch according to the present embodiment is used to open and close the aerial switch in order to determine the presence or absence of inundation inside the aerial switch 100 installed at a high position of the utility pole 200. The temperature of the laser irradiator 300 that irradiates the bottom surface 130 of the vessel 100 with a fiber laser for determining whether or not the inside of the air switch 100 is flooded, and the temperature of the irradiation position of the fiber laser on the bottom surface 130. Based on this, a determination device 400 for determining whether or not the inside of the aerial switch 100 is flooded is provided.

Specifically, when the temperature of the irradiation position of the fiber laser on the bottom surface 130 exceeds the first temperature (140 ° C.), the determination device 400 determines that the inside of the aerial switch 100 is not flooded. If the temperature does not exceed the first temperature (140 ° C.), it is determined that the inside of the aerial switch 100 is flooded.

More specifically, in the determination device 400, when the temperature of the irradiation position of the fiber laser on the bottom surface 130 exceeds the first temperature (140 ° C.) within the first hour (1 minute), the air switch 100 It is judged that the inside of the air is not flooded, and the second temperature (95 ° C.), which is lower than the first temperature (140 ° C.) even after the second time (2 minutes) longer than the first hour (1 minute) has passed. ) Is not exceeded, it is determined that the inside of the aerial switch 100 is flooded.

Further, the determination device 400 detects the infrared radiant energy appearing on the bottom surface 130 and converts it into an apparent temperature, and the inside of the aerial switch 100 is flooded based on the apparent temperature of the irradiation position of the fiber laser on the bottom surface 130. Judge whether or not it is done.

Then, according to the present embodiment, while the worker is on the ground, the temperature of the bottom surface 130 of the aerial switch 100 is detected in a non-contact manner, and whether or not the inside of the aerial switch 100 is flooded is remotely detected. Can be easily determined with.

It should be noted that the above embodiment is for facilitating the understanding of the present invention, and is not for limiting and interpreting the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention also includes an equivalent thereof.
For example, the part of the determination operation of the determination unit 420 constituting the determination device 400 may be performed by the operator while illuminating the temperature distribution map displayed on the display 411 of the infrared thermograph 410 with the time.

100 Air switch 110 Charging unit 120 Housing 130 Bottom surface 200 Electric pole 210 Distribution line 300 Laser irradiator 310 Excitation unit 311 Semiconductor laser 312, 314 Optical fiber 313 Excitation combiner 320 Resonator unit 321 High reflectance mirror 322 Amplification fiber 323 Low reflectance mirror 400 Judgment device 410 Infrared thermograph 411 Display 420 Judgment unit 430 Storage unit 440 Timer

Claims (8)

It is an inundation determination device for an aerial switch that determines the presence or absence of inundation inside an aerial switch installed on a pillar.
A laser irradiator that irradiates the bottom surface of the air switch with a laser for determining whether or not the inside of the air switch is flooded.
A determination device for determining whether or not the inside of the air switch is flooded based on the temperature of the laser irradiation position on the bottom surface.
An inundation determination device for an aerial switch, which is characterized by being equipped with. The laser is a fiber laser
When the temperature of the irradiation position of the fiber laser on the bottom surface exceeds the first temperature, the determination device determines that the inside of the aerial switch is not flooded, and exceeds the first temperature. The inundation determination device for an aerial switch according to claim 1, wherein it is determined that the inside of the aerial switch is inundated when the air switch is absent. When the temperature of the irradiation position of the fiber laser on the bottom surface exceeds the first temperature within the first hour, the determination device determines that the inside of the air switch is not flooded, and the determination device determines that the inside of the air switch is not flooded. When the second temperature, which is lower than the first temperature, is not exceeded even after the second time, which is longer than the first time, is not exceeded, it is determined that the inside of the aerial switch is flooded. The inundation determination device for an aerial switch according to claim 2. The determination device detects infrared radiant energy appearing on the bottom surface and converts it into an apparent temperature, and the inside of the air switch is flooded based on the apparent temperature of the irradiation position of the fiber laser on the bottom surface. The inundation determination device for an aerial switch according to claim 2 or 3, wherein it determines whether or not the air switch is used. It is a method for determining the inundation of an aerial switch, which determines the presence or absence of inundation inside the aerial switch installed on a pillar.
The first step of irradiating the bottom surface of the aerial switch with a laser for determining whether or not the inside of the aerial switch is flooded.
A second step of determining whether or not the inside of the aerial switch is flooded based on the temperature of the laser irradiation position on the bottom surface.
A method for determining inundation of an aerial switch, which comprises. The laser is a fiber laser
In the second step, when the temperature of the irradiation position of the fiber laser on the bottom surface exceeds the first temperature, it is determined that the inside of the aerial switch is not flooded, and the first temperature is set. The method for determining inundation of an aerial switch according to claim 5, wherein when the temperature does not exceed the limit, it is determined that the inside of the aerial switch is inundated. In the second step, when the temperature of the irradiation position of the fiber laser on the bottom surface exceeds the first temperature within the first hour, it is determined that the inside of the aerial switch is not flooded. It is characterized in that it is determined that the inside of the aerial switch is flooded when the second temperature, which is lower than the first temperature, is not exceeded even after the second time longer than the first time has elapsed. The method for determining inundation of an aerial switch according to claim 6. In the second step,
Whether or not the inside of the aerial switch is flooded based on the apparent temperature of the irradiation position of the fiber laser on the bottom surface by detecting the infrared radiant energy appearing on the bottom surface and converting it into an apparent temperature. The method for determining inundation of an aerial switch according to claim 6 or 7, wherein the determination is made.

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