JPH11332448A - Bird injury preventing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To persistently repel birds flying to a high-tension power transmission tower, etc., by condensing a high-energy laser light to form a parallel beam and swinging the beam by a specific method to irradiate birds with the beam, thereby applying scald pain to the birds with the laser light radiation and preventing the accustomedness caused by learning effect. SOLUTION: This bird injury preventing apparatus is attached to a construction such as a high-tension power transmission tower and laser light is radiated from a laser source 6. The laser light is condensed with a condensing means such as a beam expander 7 to form a parallel beam. The laser light projected from the condensing means is reflected by a horizontal scanning means having a reciprocating turning mechanism. The horizontal scanning means is e.g. an oscillation mirror 10 reciprocally turning to the right and left by a swing motor 9. The laser light formed to a parallel beam 8 by the beam expander 7 is projected to the oscillation mirror 10 to enable the reciprocating sweep of the reflected beam around the mirror 10 by the swinging oscillation of the mirror 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bird harm prevention device for preventing birds from flying or building nests on structures such as high-voltage power transmission towers, and more particularly to a bird harm prevention device using a laser beam.

[0002]

2. Description of the Related Art Recently, due to abnormal breeding of birds, the number of cases in which crows and pigeons nest in power transmission towers and parabolic antenna towers and crows and the like enter between electric wires to cause short-circuiting have increased. Therefore, among the transmission failures of the high-voltage transmission line, the number of failures due to bird damage has exceeded 10%. Most of these failures are caused by bird contact with the transmission line or short-circuit of the high-voltage line due to contact with the iron wire carried to build the nest. Many.

[0003] In recent years, in the highly information-oriented society in which electronic devices have become widespread, momentary power outages and voltage drops are not allowed. For this reason, various bird harm prevention measures described in the following <1> to <4> have been taken. It has been implemented. <1> A visual method that threatens with a reflective tape or a model crow. <2> A tactile method that makes it difficult to stop at a needle mountain, or a rope that hangs down and touches the body. <3> An auditory method that emits an unpleasant sound. <4> Nesting place. However, since the bird harm prevention device according to the above-described method does not cause any pain, the effect thereof decreases with time due to learning ability and familiarity, and there is a problem that the control effect is not sustained.

[0004]

An object of the present invention is to solve the above-mentioned problem that the control effect on birds due to learning ability and familiarity is reduced.

[0005]

According to the bird harm prevention apparatus of the present invention, a high energy laser beam is converted into a parallel beam within a predetermined range by a lens, and the parallel beam is applied to a vibrating mirror and swung in a fan-like manner. Is irradiated. According to the bird harm prevention device of the present invention, by radiating a laser beam in a fan shape along a structural member such as a high-voltage power transmission tower or the like, a laser beam flies to a structure or birds that have stopped are irradiated with a laser beam. Since the irradiation is performed, the temperature of the irradiation part on the surface of the bird body rises and burns are caused, so that re-entry can be prevented.

Further, in the conventional stimulating method utilizing a threatening sound or a bird's sight, there is a problem that the control effect is not sustained due to the learning habit, but in the present invention, the habituation by the learning hardly occurs, and the sustaining effect is difficult. A great control effect can be expected.

[0007]

DETAILED DESCRIPTION OF THE INVENTION The invention as set forth in claim 1 of the present invention is a bird harm prevention device used for a structure such as a high-voltage power transmission tower. Beam collecting means, and a horizontal scanning means having a reciprocating rotation mechanism for reflecting and irradiating the laser light input from the light collecting means. By irradiating, the surface temperature of the irradiated area of birds rises and physical pain due to burns is caused, so the effect of learning that has been a problem in bird harm prevention devices using conventional intimidating sounds and vision is reduced. It does not produce and has the effect that it can be controlled continuously.

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 and irradiates the birds with the light. It also has the function of irradiating polarized laser light to birds that have stopped at the arm part. The invention according to claim 3 is characterized in that the horizontal scanning means is a vibrating mirror reciprocatingly rotated by a motor, and the birds are spread over a wide area by radiating the laser light in a fan shape by the vibrating mirror. It has the effect of scanning and controlling.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a schematic diagram of a bird harm prevention device of the present invention. In the figure, reference numeral 6 denotes a laser light source such as a YAG laser, a CO ₂ laser, a semiconductor laser or the like; ,
Reference numeral 9 denotes a swing motor, and reference numeral 10 denotes a vibrating mirror that is reciprocally rotated left and right by the swing motor 9. According to the bird harm prevention device used in the present invention, the laser beam emitted from the laser light source 6 is φ1 to 5 mm by the beam expander 7.
The front and rear converged parallel beams 8 are input to the vibrating mirror 10, and the reflected light is radiated in a fan shape around the vibrating mirror 10 by turning the vibrating mirror 10 right and left.

FIG. 2 is a front view showing a state in which the bird harm prevention device 2 of the present invention is provided below the power transmission tower 1. The parallel beam emitted from the bird harm prevention device 2 is swung in a fan shape 13 and is emitted upward toward the structural members 3, 4, and 5, which are arm members on which birds stop. FIG. 3 is a side view of the high-voltage power transmission tower 1 of FIG. When a bird stops on one of the structural members 3, 4 and 5, and a part of the body goes out of the structural member, a parallel beam of laser light crosses the bird's body and the surface temperature of the bird's part irradiated with the laser light is reduced. Raises, causing physical distress from burns. (Embodiment 2) FIG. 6 is a plan view of a high-voltage power transmission tower 1 as viewed from above. In the steel tower 1 of this shape, the structural member 1
If birds stop at 1 and 12, it is necessary to adopt a configuration in which laser light is also three-dimensionally scanned along the structural members 11 and 12.

FIG. 4 is a schematic diagram of the bird damage prevention apparatus of the present invention which realizes three-dimensional scanning. In the figure, a laser light source 6,
The beam expander 7, the parallel beam 8, the vibration motor 9, and the vibration mirror 10 are the same as those in the first embodiment, and the description is omitted. In the figure, reference numeral 19 denotes a second oscillating motor, and reference numeral 20 denotes a second oscillating mirror to which a laser beam oscillated in a fan-like shape 13 is supplied.

In this embodiment, the laser beam 8 focused by the beam expander 7 is
The reflected light is re-reflected by the oscillating mirror 20, is swung into a fan shape, and is irradiated along the arm 12 as shown in FIG. Also, the vibrating mirror 20
If the reflection direction is reversed, irradiation is performed along the arm bar 11 as shown in FIG.

As described above, the laser beam emitted from the laser light source 6 is supplied to the beam expander 7 by φ1 to 5 mm.
A parallel beam 8 with less front and rear diffusion is input to a vibrating mirror 10 which is rotated by a swing motor 9 and is swung in a fan shape. The laser light that has been swung right and left is input to a vibrating mirror 20 that is rotated by a swing motor 19, and irradiates 11 and 12. At this time, irradiation of 11 and 12 is performed by switching the reflection direction of the vibrating mirror 20 as described above. In addition, 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) To prevent birds from stopping on the structural members on both sides of the high-voltage power transmission tower 1, two bird harm 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 center of the tower 1 is φ1 to 5 m by the beam expander 7.
m and a parallel beam 8 with little diffusion, and a mirror 35
It is thrown into. The parallel beam 8 reflected by the mirror 35 changes its direction, becomes a parallel beam 28, enters the bird harm prevention device 2, and is oscillated in a fan shape by a vibrating mirror 30 that reciprocates right and left 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
Are inverted to form a parallel beam 28 ', which is incident on the bird harm prevention device 2' and is radiated in a fan shape. By repeating such an operation, it is possible to control two surfaces of the high-voltage power transmission tower.

FIG. 10 shows the bird harm prevention device 2 as a structural member 3,
This is an example of horizontal installation at 4 and 5. As described above, birds can be prevented from flying even when the laser light is scanned horizontally. Next, the repelling reaction of the bird to the laser beam will be described. The following test was performed to confirm the repellent reaction. (Basic test)

[0015]

[Test method] -Fixing method--If the crow moves even slightly during irradiation due to the small beam diameter, the thermocouple sensor to be embedded in the body is expected to come off the irradiated part. (Selactal) was administered and fixed to a fixed base with an elastic band.

-Temperature Measuring Method- The following items <1> to <9> are set for each output (2.0 W, 1.7 W, 1.5 W, 1.0 W and 1.0 W) for the chest and legs.
5W). <1> A crow was fixed at a position 1 m from the laser emission port. <2> The fixed crow has H on the same optical axis as the YAG laser.
Marking was performed with an e / Ne laser. <3> The sensor part of the thermocouple was inserted into the muscle at the marked site. <4> The thermocouple was fixed to the body surface with adhesive tape so that the thermocouple did not come off. <5> The terminal of the thermocouple was connected to the XY recorder. The range is 0.2 cm / sec on the X axis and 0.2 mV / sec on the Y axis.
cm. 0.2 mV corresponds to 3.38 ° C. However, when the temperature rise was large, the range of the Y axis was changed as needed. <6> The crow was shielded by a shielding plate so that the crow was not irradiated with the YAG laser, the power was turned on, and the output was adjusted. <7> The power switch of the YAG laser was turned off, and the shielding plate was removed. <8> Five seconds after the start of the operation of the XY recorder, YAG laser irradiation was performed. <9> After reaching the maximum temperature, laser irradiation was stopped.

[0017]

[Results] FIG. 11 shows the maximum attained temperatures of the chest and the legs, and the times at which the temperatures were reached. The correlation that the maximum attained temperature (bar graph) increases as the output of both the chest and the legs increases was observed. At this time, the temperature of the legs was larger than that of the chest, and when the output was changed from 0.5 W to 2.0 W in the chest, the temperature rose from 48.2 ° C. to 85.2 ° C.
In the case of the legs, if the output is also changed, from 72.3 ° C to 2
The temperature rose to 73.0 ° C. Also, between the two, the legs were higher than the temperature of the chest at all outputs.

On the other hand, the time required to reach the maximum temperature (line graph) tended to decrease as the output increased in the chest, but was reduced at 2.0 W in the legs except for the tendency. The arrival time was almost constant regardless of the output. Also, the time to reach maximum temperature at all outputs was shorter for the legs than for the chest. FIG. 12 shows the time required for the temperature to rise by 10 ° C. from the body temperature (42.97 ± 1.60 ° C.). At all outputs, it was observed that the temperature rise in the legs was faster than in the chest. 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 legs. Irradiation to the legs is effective for rapidly raising the temperature. (Avoidance reaction test)

[0019]

[Test method] The following items were output (2.0 W, 1.7
W, 1.5 W, 1.0 W and 0.5 W). <1> One crow was placed in the observation basket. <2> The side surface of the observation basket was adjusted to a position 1 m away from the laser irradiation port. <3> The crow was shielded by a shielding plate so that the crow was not irradiated with the YAG laser, the power was turned on, and the output was adjusted. <4> The power switch of the YAG laser was turned off, and the shielding plate was removed. <5> The video camera was operated (recorded) and irradiated with a YGA laser and a He-Ne laser for marking. At this time, it was sufficiently confirmed in advance that no repelling 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>"Jumpup","lift the irradiated foot"
Behavior was considered an aversion. <8> One irradiation was performed for up to 60 seconds in view of the power supply capacity. <9> Since the crow that showed a single repelling reaction retreated to a position where the laser was not irradiated in the cage, each output was irradiated once (60 seconds) to 12 crows. <10> Using the recorded image, the YAG laser irradiation site was analyzed from the He-Ne laser marking position, and the time from when the crow was irradiated with the laser until the repelling reaction was performed and the frequency of the repelling reaction were analyzed. <11> At the time of analysis, the irradiation site was the chest, leg, and others. The others were irradiated within 60 seconds but did not show repelling reaction, and were not irradiated.

[0020]

[Results] The frequency of the repellent reaction is shown in FIG.
At 1.7 W for all irradiations and at 2.0 W for all but one irradiation, the crow showed a repellent response. 1.5
At an output of W or less, the frequency of the repellent reaction decreased, and became 1/3 or less of the total number of irradiations.

At 1.7 W and 2.0 W, the time required for the legs to show a repellent reaction was shorter than that for the chest, which is the same result as in the basic test. From FIG.
As the output increases from W to 1.7 W, the time required for the crow to show a repelling reaction decreases from 6.0 seconds to 1.8 seconds, but between 1.7 W and 2.0 W, the time until the crow shows a repelling reaction is 1. It has leveled off in 8 seconds. It is considered that it takes about 1.8 seconds for the repellent reaction to occur 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, the power is shortened to 17 seconds, 6 seconds, and 3.1 seconds.

Further, from the graph of FIG. 14, it is suggested that the crow shows a repellent reaction at the same time in both the chest and the leg with 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 determined from the behavior of the crow, which "jumps" by laser irradiation.

Regarding the output of the laser, it is necessary to raise the temperature of the irradiated portion of the flying crow in a shorter period of time in consideration of the control of the steel tower. To raise, YA
An output of 2.2 W or more is required for the G laser. In addition, when attention is paid only to the legs, it is effective at an output of 1.7 W or more.

As mentioned above, the equipment used in the present invention is of sufficient capacity already on the market.
It can be applied to bird damage prevention devices.

[0025]

The method adopted as a conventional method for controlling birds and beasts has a problem that even if it is effective at the beginning of adoption, it does not work due to the familiarity of the target birds after learning, and the effect is not persistent. In particular, in a stimulating method using the visual or auditory sense of the animal, such as an eyeball pattern or a repellent sound, the learning is eventually learned and the sustained effect is lost.

According to the present invention, the laser beam causes physical distress to the infested birds, so that it is hard to be used by learning, and a continuous control effect can be expected.

[Brief description of the drawings]

FIG. 1 is a schematic view of a bird harm prevention device of the present invention.

FIG. 2 is a front view of a power transmission tower provided with the bird harm prevention device of the present invention.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a schematic view of another bird harm prevention device of the present invention.

FIGS. 5A and 5B are operation diagrams of a laser beam.

FIG. 6 is a plan view of a power transmission tower provided with the bird harm prevention device of the present invention.

FIG. 7 is a side view of a power transmission tower provided with the bird harm prevention device 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 device of the present invention.

FIG. 10 is a side view of a power transmission tower provided with the bird harm prevention device of the present invention.

FIG. 11 is a diagram showing a maximum temperature reaching temperature and a time at a laser irradiation site.

FIG. 12 is a diagram showing a time required to increase by 10 ° C. from body temperature.

FIG. 13 is a diagram showing a crow's repellent reaction.

FIG. 14 is a diagram showing the time until a crow shows a repellent reaction.

[Description of Signs] 1 Steel tower 2 Bird harm prevention device 3, 4, 5, 11, 12 Structural member 6 Laser light source 7 Beam expander 8, 28 Parallel beam 9, 19, 29 Oscillating motor 10, 20, 30, 35 Vibration Mirror 13 Fan swing range 14 Birds

Claims (3)

[Claims] 1. A bird harm prevention device used for a structure such as a high-voltage power transmission tower, comprising: a condensing means for converging laser light emitted from a laser light source into a parallel beam; A bird harm prevention device comprising a horizontal scanning means having a reciprocating rotation mechanism for reflecting and irradiating a laser beam. 2. The bird harm prevention device according to claim 1, wherein the reflected light from the horizontal scanning means is reflected by a second horizontal scanning means having a reciprocating rotation mechanism and irradiated to birds. 3. The horizontal scanning means is a vibrating mirror reciprocatingly rotated by a motor.
Bird damage prevention device as described.