JP3756320B2 - Bird damage prevention device - 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 a laser beam.
[0002]
[Prior art]
Recently, due to abnormal breeding of birds, there are increasing cases of crows and pigeons nesting on power transmission line towers and parabona antenna towers, or crows and the like entering between electric wires to generate short-circuiting items. 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 according to the present invention converts a high-energy laser beam into a parallel beam within a predetermined range by a lens, throws the parallel beam into a vibrating mirror, irradiates it with a fan shape, and irradiates birds.
According to the bird damage prevention apparatus of the present invention, a laser beam is applied to a bird flying or stopped on a structure by irradiating the laser beam in a fan shape along a structural member such as a high-voltage power transmission tower. Since it is irradiated, the temperature of the irradiated part on the surface of the bird's body rises and burns are caused, so that re-flying can be prevented.
[0006]
In addition, the conventional stimulation method using threatening sounds and bird vision has a problem that the control effect is not persistent due to learning habituation. Can be expected.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Invention of Claim 1 of this invention is a bird damage prevention apparatus used for structures, such as a high voltage power transmission tower, Comprising: The condensing means which condenses the laser beam irradiated from a laser light source, and makes it a parallel beam, , Characterized in that it comprises a horizontal scanning means having a reciprocating rotation mechanism for reflecting and irradiating laser light input from the condensing means, and by irradiating the birds with laser light, Since the surface temperature of the irradiated area is raised and physical distress is caused by burns, the effect of learning, which has been considered a problem in conventional bird threat prevention devices using threatening sounds and vision, does not decrease and is sustained. It has the effect that it can be controlled.
[0008]
The invention according to claim 2 is characterized in that the reflected light from the horizontal scanning means is reflected by the second horizontal scanning means provided with a reciprocating rotation mechanism to irradiate birds. It also has an effect that it can irradiate a laser beam polarized to a bird that is still in the area.
The invention according to claim 3 is characterized in that the horizontal scanning means is a vibrating mirror that is reciprocally rotated by a motor. By irradiating the laser beam in a fan shape with the vibrating mirror and irradiating a wide range of birds. It has the function of scanning and controlling.
[0009]
Embodiment
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a schematic view of the bird harm prevention apparatus of the present invention.
In the figure, reference numeral 6 denotes a laser light source such as a YAG laser, a CO ₂ laser, and a semiconductor laser, and 7 denotes a beam expander that converts a laser beam irradiated from the laser light source 6 into a parallel beam 8 with a small diffusion around φ1 to 5 mm. , 9 is a oscillating motor, and 10 is a oscillating mirror that is reciprocally rotated left and right by the oscillating motor 9. According to the bird harm prevention apparatus used in the present invention, the laser beam irradiated from the laser light source 6 is input to the vibrating mirror 10 as a parallel beam 8 having a diameter of about 1 to 5 mm collected by the beam expander 7, The reflected light is radiated in a fan shape around the oscillating mirror 10 by the left and right rotation of the oscillating mirror 10.
[0010]
FIG. 2 is a front view showing a state in which the bird harm prevention apparatus 2 of the present invention is provided in the lower part of the power transmission tower 1. The parallel beam irradiated from the bird damage prevention apparatus 2 is swayed in a fan shape 13 and is irradiated upward toward the structural members 3, 4, and 5 which are braces on which birds are stopped.
FIG. 3 is a side view of the high-voltage power transmission tower 1 of FIG. When birds stop on one of the structural members 3, 4 and 5, and a part of the body comes out of the structural member, the parallel beam of laser light crosses the bird's body, and the surface temperature of the part of the birds irradiated with the laser light is reduced. Rise and cause physical pain from burns.
(Embodiment 2)
FIG. 6 is a plan view of the high-voltage power transmission tower 1 as viewed from above. In the steel tower 1 having this shape, it is necessary that the laser beam be three-dimensionally scanned along the structural members 11 and 12 if birds stop on the structural members 11 and 12.
[0011]
FIG. 4 is a schematic diagram of the bird harm prevention apparatus of the present invention that realizes three-dimensional scanning. In the figure, a laser light source 6, a beam expander 7, a parallel beam 8, a vibration motor 9, and a vibration mirror 10 are the same as those in the first embodiment, and a description thereof is omitted. In the figure, 19 is a second swing motor, and 20 is a second vibrating mirror into which a laser beam swung in a fan shape 13 is introduced.
[0012]
In the present embodiment, the laser beam 8 collected by the beam expander 7 is reflected by the vibration mirror 10, and the reflected light is re-reflected by the vibration mirror 20 and shaken in a fan shape, as shown in FIG. As shown in FIG. Further, if the reflection direction of the oscillating mirror 20 is reversed, irradiation is performed along the brace 11 as shown in FIG.
[0013]
In this way, the laser beam emitted from the laser light source 6 is made into a parallel beam 8 having a small diffusion of about 1 to 5 mm by the beam expander 7 and is thrown into the oscillating mirror 10 rotated by the oscillating motor 9 so as to be fan-shaped. The laser beam swung to the left and right is input to a vibrating mirror 20 that is rotated by a swing motor 19 to irradiate 11 and 12. At this time, the irradiation of 11 and 12 is performed by switching the reflection direction of the vibrating mirror 20 as described above. Further, by adjusting the timing of the swing motor 9 and the swing motor 19, beam irradiation along the structural members 11, 3, and 12 can be performed.
(Embodiment 3)
In order to prevent birds from stopping on the structural members on both sides of the high-voltage power transmission tower 1, two bird damage prevention devices 2 are required. FIG. 7 shows an example in which one laser light source is used. The laser beam emitted from the laser light source 6 provided at the central portion of the steel tower 1 is converted into a parallel beam 8 having a small diffusion of about φ1 to 5 mm by the beam expander 7 and is input to the mirror 35. The parallel beam 8 reflected by the mirror 35 changes its direction, becomes a parallel beam 28, enters the bird harm prevention apparatus 2, and is irradiated in a fan shape by a vibration mirror 30 that reciprocates left and right by a swing motor 29 shown in FIG. Is done. When the scanning along the structural members 3, 4, 5 is completed, the mirror 35 is inverted and becomes a parallel beam 28 ′, enters the bird harm prevention apparatus 2 ′, is shaken in a fan shape, and is irradiated. By repeating such an operation, the two surfaces of the high-voltage power transmission tower can be controlled.
[0014]
FIG. 10 shows an example in which the bird damage prevention apparatus 2 is installed horizontally on the structural members 3, 4, and 5. Thus, even if the laser beam is scanned horizontally, it is possible to prevent birds from flying.
Next, the repelling reaction of birds to laser light will be described. The following test was conducted to confirm the repellent reaction.
[Basic test]
[0015]
【Test method】
-Fixing method-
・ Because the beam diameter is small, if the crow moves even slightly during irradiation, the thermocouple sensor embedded in the body is expected to come off the irradiated part. It was fixed with a rubber band.
[0016]
-Temperature measurement method-
The following items <1> to <9> were repeated for each output (2.0 W, 1.7 W, 1.5 W, 1.0 W and 0.5 W) for the chest and legs.
<1> A crow was fixed at 1 m from the laser exit.
<2> The fixed crow was marked with a He / Ne laser on the same optical axis as the YAG laser.
<3> A thermocouple sensor was inserted into the marked muscle.
<4> It was fixed to the body surface with gummed tape so that the thermocouple would not come off.
<5> The thermocouple terminal was connected to an XY recorder. The range was 0.2 cm / sec on the X axis and 0.2 mV / cm on the Y axis. 0.2mV corresponds to 3.38 ° C. However, when the temperature rise was large, the Y-axis range was changed as needed.
<6> The YAG laser was shielded with a shielding plate to prevent the crow from being irradiated, and the power was turned on to adjust the output.
<7> The YAG laser power switch was turned off and the shielding plate was removed.
<8> YAG laser was irradiated 5 seconds after the start of the operation of the XY recorder.
<9> Laser irradiation was stopped after reaching the maximum temperature.
[0017]
【result】
FIG. 11 shows the maximum temperature reached for each of the chest and legs and the time for reaching the temperature. There was a correlation that the maximum temperature (bar graph) increased as the output of the chest and legs increased. At this time, the temperature of the leg is higher than that of the chest, and when the output is changed from 0.5 W to 2.0 W in the chest, the temperature rises from 48.2 ° C to 85.2 ° C. Then, when the output was similarly changed, the temperature rose from 72.3 ° C. to 273.0 ° C. In addition, the leg was higher than the chest temperature at all outputs between the two.
[0018]
On the other hand, the time required to reach the maximum temperature (line graph) tended to be shorter as the output increased in the chest, but the output was affected except for the tendency to decrease at 2.0 W in the legs. The arrival time was almost constant. The time to reach the maximum temperature for all outputs was shorter for the legs than for the chest.
FIG. 12 shows the time required for the body temperature (42.97 ± 1.60 ° C.) to rise by 10 ° C. It was observed that the leg temperature increased faster than the chest at all outputs. From this graph, the output for raising the temperature by 10 ° C. in 10 seconds is 1.83 W for the chest and 0.72 W for the leg. Irradiation to the leg is effective for raising the temperature quickly.
[Repellent reaction test]
[0019]
【Test method】
The following items were repeated for each output (2.0 W, 1.7 W, 1.5 W, 1.0 W and 0.5 W).
<1> A crow was placed in the observation basket.
<2> The side of the observation basket was placed at a position 1 m away from the laser irradiation port.
<3> The YAG laser was shielded with a shielding plate to prevent the crow from being irradiated, and the power was turned on to adjust the output.
<4> The YAG laser power switch was turned off and the shielding plate was removed.
<5> The video camera was activated (recorded) and irradiated with a YGA laser and a marking He—Ne laser. At this time, it was sufficiently confirmed in advance that no repellent reaction was exhibited with respect to the He—Ne laser.
<6> The irradiation direction of the YAG laser was fixed, and the leg or chest was irradiated.
<7> The actions of “jumping up” and “lifting up the irradiated leg” were regarded as repelling reactions.
<8> Due to power supply capacity, one irradiation was performed for up to 60 seconds.
<9> The crows that showed a repelling reaction once retreated to the position where the laser was not irradiated in the cage. Therefore, 12 crows were irradiated with each output once (60 seconds).
<10> The YAG laser irradiation part was analyzed from the marking position of the He-Ne laser using the recorded image, and the time from when the laser was irradiated to the laser and the frequency of the repellent reaction was analyzed.
<11> At the time of analysis, the irradiated sites were the chest, legs, and others. Others were irradiated within 60 seconds but did not show a repellent reaction or could not be irradiated.
[0020]
【result】
FIG. 13 shows the frequency of the repellent reaction. In all irradiations at 1.7 W, crows showed a repellent response in all but one irradiation at 2.0 W. At an output of 1.5 W or less, the frequency of a repellent reaction decreased, and became 1/3 or less of the total number of irradiations.
[0021]
At 1.7 W and 2.0 W, the time required for the leg to exhibit a repellent response compared to the chest was short, which is the same result as in the basic test.
From FIG. 14, as the output increases from 1.0 W to 1.7 W of the leg, the time until the crow shows a repellent reaction is shortened from 6.0 seconds to 1.8 seconds, but from 1.7 W Between 2.0W, it is flat in 1.8 seconds. It is considered that it takes about 1.8 seconds to show a repellent reaction in the leg. On the other hand, in the chest, as the output increases from 0.5 W to 1.7 W and 2.0 W, it decreases to 17 seconds, 6 seconds, and 3.1 seconds.
[0022]
Furthermore, it is suggested from the graph of FIG. 14 that the crow shows a repellent reaction at the same time for both the chest and legs at an output of 2.2 W or more.
As shown in the above results, the laser has a repellent effect on birds such as crows. This can be easily judged from the behavior of a crow that “jumps” by laser irradiation.
[0023]
Regarding the laser 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, for example, to raise the chest and legs by 10 ° C. within 1.8 seconds. Requires a power of 2.2 W or more with a YAG laser. In the case where attention is paid only to the leg portion, an output of 1.7 W or more is effective.
[0024]
As described above, it is sufficient that the apparatus used in the present invention has a capability already on the market, and application to a bird damage prevention apparatus is possible.
[0025]
【The invention's effect】
Even if the method adopted as a conventional method for controlling damage to birds and beasts is effective at the time of its adoption, there is a problem that it becomes ineffective due to the familiarity of learning of the target birds and there is no sustainability of the effect. In particular, stimulation methods that use animal vision and hearing, such as eyeballs and repellent sounds, are finally learned and the sustaining effect disappears.
[0026]
According to the present invention, since laser light gives physical pain to the perpetuating birds, it is difficult to get used to learning, and a continuous control effect can be expected.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a bird harm prevention apparatus of the present invention.
FIG. 2 is a front view of a power transmission tower provided with the bird harm prevention apparatus of the present invention.
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a schematic view of another bird harm prevention apparatus of the present invention.
FIGS. 5A and 5B are operation diagrams of laser beams. FIGS.
FIG. 6 is a plan view of a power transmission tower provided with the bird harm prevention apparatus of the present invention.
FIG. 7 is a side view of a power transmission tower provided with the bird harm prevention apparatus of the present invention.
FIG. 8 is an operation diagram of a laser beam.
FIG. 9 is a schematic view of another bird harm prevention apparatus of the present invention.
FIG. 10 is a side view of a power transmission tower provided with the bird harm prevention apparatus of the present invention.
FIG. 11 is a diagram showing the maximum temperature reaching temperature and time at a laser irradiation site.
FIG. 12 is a diagram showing a time from a body temperature to a rise of 10 ° C.
FIG. 13 is a diagram showing a crow repellent reaction.
FIG. 14 is a diagram showing a time until a crow shows a repellent reaction.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Steel tower 2 Bird damage prevention device 3, 4, 5, 11, 12 Structural member 6 Laser light source 7 Beam expander 8, 28 Parallel beam 9, 19, 29 Oscillation motor 10, 20, 30, 35 Oscillation mirror 13 Fan-like oscillation range 14 Birds

Claims (1)

A bird harm prevention apparatus used for structures such as high-voltage power transmission towers, which condenses laser light emitted from a laser light source into a parallel beam and a laser beam input from the condensing means for a motor The horizontal scanning means provided with the reciprocating rotation mechanism that reflects and irradiates the vibration mirror that reciprocates and rotates, and the second horizontal scanning means provided with the reciprocating rotation mechanism that reflects and irradiates the reflected light from the horizontal scanning means. cockles prevention device characterized by comprising a.

Images