JP3756319B2 - Bird damage prevention method - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a bird damage prevention apparatus for preventing birds from flying to or nesting a structure such as a high-voltage power transmission tower, and more particularly to a bird damage prevention apparatus using microwaves.
[0002]
[Prior art]
Recently, due to abnormal breeding of birds, there are increasing cases of crows and pigeons nesting in power transmission towers, parabona antenna towers, etc., and crows etc. entering between wires to cause short-circuits. The number of faults due to bird damage exceeds 10%. Such failures are mostly caused by short-circuiting of high-voltage electric wires due to contact of birds with power transmission lines and contact of iron wires carried for nesting, and the impact at the time of occurrence can be large because it cannot be predicted in advance. Many.
[0003]
As in recent years, in an advanced information society where electronic devices have become widespread, momentary power outages and voltage drops are not allowed, and various bird damage prevention measures such as the following <1> to <4> have been implemented. Yes.
<1> Visual system threatening with reflective tape or model crow
<2> A tactile method that makes it difficult to stop at the needle mountain or allows the rope to hang down and touch the body
<3> Hearing method that produces disgusting sounds
<4> Guidance method that separates the nesting site from the power transmission line However, all of the bird damage prevention devices using the methods described above do not hurt, so the effectiveness fades with time due to learning ability and habituation, and the pest control effect does not continue. There is a problem.
[0004]
[Problems to be solved by the invention]
The present invention is intended to solve the above-described problem that the effect of controlling birds by learning ability and familiarity is reduced.
[0005]
[Means for Solving the Problems]
The bird damage prevention apparatus of the present invention converts a high-output microwave into a nearly parallel beam and irradiates the birds with the beam shaken in a fan shape.
According to the bird damage prevention apparatus of the present invention, microwaves are radiated to a structure that is flying or stopped by irradiating microwaves by swaying them left and right along pillars and braces such as high-voltage power transmission towers. As a result, a part of the inside of the bird's body rises in temperature and burns, preventing re-flying.
[0006]
Moreover, according to the bird damage prevention apparatus of the present invention, since a microwave tube used in a home microwave oven or the like can be used as a microwave oscillator, a low cost bird damage prevention apparatus can be provided.
Furthermore, in the conventional stimulation methods using threatening sounds and bird vision, there was a problem that there was no sustainability of the control effect due to familiarity with learning, but in the present invention, because microwaves give physical pain to birds, Familiarity with learning is unlikely to occur and a sustained control effect can be expected.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The invention described in claim 1 of the present invention is a bird harm prevention apparatus used in a structure such as a high-voltage power transmission tower, and narrows the spread angle of radiated radio waves oscillated from the microwave oscillator and the microwave oscillator, and is substantially parallel. It is characterized by comprising a microwave antenna and a scanning mechanism that swings the antenna left and right. According to the bird harm prevention apparatus of the present invention, it is used as a microwave oscillator in a home microwave oven, etc. Since a microwave tube with an oscillation frequency of 2.45 GHz and an output of 900 W can be used, it is possible to provide a low-cost bird damage prevention device. Furthermore, conventional stimulation methods using threatening sounds and bird vision are used to learning. However, in the present invention, since microwaves cause physical distress to birds, habituation due to learning is unlikely to occur and the control effect is sustained. It has the effect that can be exhibited.
[0008]
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is a block diagram of a bird damage prevention apparatus 2 according to the present invention. FIG. 2 is a front view showing a state in which the bird damage prevention apparatus 2 is installed at the lower portion of the high-voltage power transmission tower 1 and microwaves are irradiated in the vertical direction. 2 is a side view of FIG. 2, and FIG. 4 is a plan view showing a state in which microwaves are irradiated in a plane direction.
[0009]
In FIG. 1, 6 is a microwave oscillator, 7 is a coaxial cable, 8 is an antenna, 9 is a motor that reciprocally rotates the antenna 8 within a preset range, and 10 is a vibration that transmits the rotation of the motor 9 to the antenna 8. It is a dynamic axis.
The microwave oscillator 6 uses a microwave tube having an oscillation frequency of 2.45 GHz and an output of 500 W that is generally used in a microwave oven for home use. The microwave propagates to the transmission line of the coaxial cable 7. Further, a waveguide can be used for the coaxial cable 7.
[0010]
As the antenna 8, a parabona antenna or a horn antenna is used, and the microwave is radiated by the antenna 8 as a nearly parallel beam. The scanning mechanism 9 swings the antenna 8 left and right, and rotates the shaft 10 left and right by forward / reverse rotation of the motor, and swings the antenna 8 provided at the tip of the shaft 10 left and right. . As a result, a nearly parallel microwave beam is radiated in a fan shape and can be scanned over a wide range.
[0011]
2 and 3 show a state in which the bird damage prevention apparatus of the present invention is provided in the lower part of the high-voltage power transmission tower 1 and microwaves are irradiated upward. In the figure, a nearly parallel microwave beam is scanned upward in a fan shape along the structural members 3, 4, 5 where birds are stopped from the bird harm prevention apparatus 2.
As shown in FIG. 3, when birds stop on one of the structural members 3, 4, and 5 and a part of the body protrudes from the structural member, a nearly parallel microwave beam that scans in a fan shape Is irradiated with microwaves, raising the body temperature of birds, and burns the irradiated area.
[0012]
FIG. 4 is a view showing an embodiment in which scanning is performed so as to be parallel along the structural members 3, 4, and 5. In the embodiment shown in FIGS. 2 and 3, it is not possible to irradiate the birds flying on the protruding portions 11 and 12 of the structural member with microwaves. In such a case, the bird damage prevention device 2 is installed on the structural members 3, 4, and 5, and the microwave beam is swung 180 degrees in the horizontal direction to fly on the structural members 3, 4, and 5. By irradiating birds with microwaves, birds can be prevented from flying again. In this case, a scanning mechanism and an antenna can be installed on the component members 3, 4, and 5, and the microwave oscillator can be separated and installed at the lower part of the high-voltage power transmission tower 1.
[0013]
Next, the repellent response of birds to microwaves will be described. The following test was conducted to confirm the repellent reaction.
-Temperature measurement method-
In this test, the output was not changed, and the distance from the waveguide port to the crow was changed to 0.5 and 10 cm, and three birds were irradiated according to the following items for a total of nine birds.
[0014]
<1> A sensor part of a thermocouple was embedded at a depth of 1 mm from the body surface of the chest.
<2> The thermocouple terminal was connected to an XY recorder.
<3> Microwave was irradiated 5 seconds after the start of the operation of the XY recorder.
<4> After reaching the maximum temperature, microwave irradiation was stopped.
<5> The behavior of the crow during irradiation was recorded with a video camera.
[0015]
【result】
FIG. 5 shows the maximum temperature achieved by microwave irradiation and the time required to reach it. As the distance between the crow and the waveguide increased to 0 cm, 5 cm, and 10 cm, the maximum temperatures reached 107.0 ° C., 93.3 ° C., and 83.2 ° C., respectively. In addition, the time required for the temperature increase tended to be as long as 40.3 seconds, 36.7 seconds, and 52.6 seconds.
[0016]
The crows were observed to act by opening their mouths and hanging their tongues or flapping their legs when irradiated with microwaves.
Further, the time from the start of microwave irradiation to the action of “opening the mouth” and “twisting the body” is obtained, and this is shown in FIG. As behavioral patterns, after opening the mouth, the behavior of twisting the body was recognized, so these two were classified and the time was calculated.
[0017]
As for any behavior, when the distance to the waveguide is short, the time until the behavior is shown tends to be short.
Because the crow was administered a muscle relaxant, even though it was in a sufficiently resting state before microwave irradiation, it had a repellent effect because it fluttered greatly and observed behavior to escape from the fixed base. Conceivable.
[0018]
From the above experimental results, it was confirmed that the microwave has a repellent effect on birds such as crows. This can be easily judged from the behavior of the crows who are largely fluttered and are trying to escape from the fixed base in spite of the state where the muscles are relaxed by microwave irradiation.
Regarding the output, when taking control of the steel tower into consideration, it is necessary to raise the temperature of the irradiated part of the flying crow in a shorter time. The output immediately after the irradiation opening of the wave tube is effective if it is about 500 W or more used in a home microwave oven.
[0019]
A home-use microwave oscillator is inexpensive, and an apparatus having the above-described output can be easily provided by taking measures to suppress the diffusion.
[0020]
【The invention's effect】
According to the bird damage prevention apparatus of the present invention, a microwave tube having an oscillation frequency of 2.45 GHz and an output of 500 W or more that is used in a microwave oven as a microwave oscillator can be used. Can provide.
Furthermore, the conventional stimulation methods using threatening sounds, bird vision, etc. have a problem that the control effect is not sustainable due to learning habituation. , Habituation due to learning is less likely to occur and can exert a continuous control effect.
[Brief description of the drawings]
FIG. 1 is a block diagram of a bird harm prevention apparatus of the present invention.
FIG. 2 is a front view showing a state in which a bird damage prevention device is provided at the lower part of the high-voltage power transmission tower and microwaves are scanned in the vertical direction.
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a plan view showing a state in which microwaves are scanned in the horizontal direction on the high-voltage power transmission tower.
FIG. 5 is a diagram showing the maximum temperature reached and the time required for microwave irradiation.
FIG. 6 is a diagram showing the time from the start of microwave irradiation until the action of “opening mouth” and “twisting body” is recognized.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Power transmission tower 2 Bird damage prevention apparatus 3, 4, 5 Structural member 6 Microwave oscillator 7 Coaxial cable 8 Antenna 9 Scanning mechanism 10 Axis 11, 12 Structural member

Claims (1)

A cockles prevention methods used to construct such high voltage transmission tower, the oscillation frequency 2.45 GHz, a microwave oscillator for outputting microwaves of higher output 500 W, substantially parallel to radiate microwave oscillated from microwave oscillator And a scanning mechanism that swings the antenna to the left and right within a preset range, irradiating birds with microwaves from the antenna, causing burns to the irradiated area, and flying birds to steel towers, etc. cockles prevent wherein the preventing.

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