JPH041815Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bird repelling device for preventing damage caused by birds.

[Conventional technology]

As for damage caused by birds, Crop damage caused by flocks of sparrows.

Feces damage caused by pigeons that can be seen at stations, shrines and temples, and factories.

Power outage accidents caused by birds entering substations and power plants.

By hanging out at airfields, they interfere with planes taking off and landing.

Conventionally, the following measures have been taken.

Murder by drugs.

Capturing by trap.

A board with needles attached to the roof is installed to prevent birds from landing on it.

Measures to prevent birds from landing using a landing prevention net.

Among these measures, killing with chemicals is not desirable in these days when the spirit of nature conservation and animal welfare is on the rise, and trapping leaves problems with subsequent disposal. Furthermore, the measures to prevent birds from approaching or landing have the disadvantage that the device becomes large-scale.

For this reason, devices have been proposed to repel birds by emitting loud audible sounds to frighten them.
Such loud audible sounds are also bothersome to humans, and may lead to deterioration of the living environment as noise pollution.

By the way, for example, Japanese Utility Model Publication No. 62-102385 and Japanese Utility Model Publication No. 55-39982 disclose devices for scaring and exterminating rats by applying ultrasonic waves to them. By using such ultrasonic waves to intimidate birds, it is possible to repel birds without killing or capturing them, while respecting the spirit of nature conservation and animal welfare. be able to. Furthermore, since ultrasonic waves cannot be heard by humans, it is possible to prevent situations that would worsen the living environment.

However, in order to repel birds with ultrasonic waves, it is necessary to apply high-output ultrasonic waves in an impactful manner. If the configuration is such that high-output ultrasonic waves are constantly emitted, although they cannot be directly heard by the human ear, there is a risk that they may become felt as potential discomfort over a long period of time. . Therefore, for example,
As stated in Publication No. 134934, ultrasonic waves can also be used to detect the presence or absence of an object by detecting the reflected waves after it hits an object. It is conceivable to emit low-power ultrasonic waves to detect the presence of birds, and then emit high-power ultrasonic waves for a predetermined period of time only when the presence of birds is detected. ,
This makes it possible to suppress the above-mentioned problems.

[The problem that the idea aims to solve]

However, as described above, even in a configuration in which ultrasonic waves with a low output necessary for detecting birds are normally sent out, there is a problem in that the output cannot necessarily be reduced sufficiently. In other words,
In order to detect birds that cannot predict which direction they will fly from, it is necessary to widen the transmission range as much as possible, regardless of the characteristics of ultrasonic waves with good directionality. In this case, the intensity of the reflected waves from the bird weakens, making accurate detection impossible. Therefore, in order to ensure the intensity of the reflected waves to a certain extent, it is necessary to increase the output of the ultrasonic waves sent out for bird detection to a certain extent.

The present invention was devised in view of the above-mentioned conventional problems, and its purpose is to suppress the output state of ultrasonic waves as much as possible, thereby preventing the occurrence of harmful effects on the living environment. Our goal is to provide the following.

[Means to solve the problem]

Therefore, the bird repelling device of the present invention includes an object detection means that transmits ultrasonic waves with a relatively low output and detects the presence of the object by receiving the ultrasonic waves reflected back from an object, and detects the presence of the object. and a bird-repelling ultrasonic wave generator that sends out relatively large-output bird-repelling ultrasonic waves for a certain period of time when the presence of an object is detected by the detection means, and the ultrasonic wave is transmitted from the object detection means. The present invention is characterized in that a rotating means is provided for rotating the object detecting means so that periodic changes occur in the direction.

[Effect]

According to the above configuration, when the presence of a bird is detected by the object detection means, the ultrasonic wave for repelling the bird is generated, so that the adverse effects caused by constantly sending out high-output ultrasonic waves are suppressed. Since the object detecting means is configured to be rotated by the rotating means, even if the sending range of the object detection ultrasonic waves sent from the object detecting means into the space is appropriately narrowed, this sending out Since the range changes periodically, it becomes possible to detect birds over a wide range.

As a result, it is possible to detect birds over a wide spatial range, and because the configuration makes full use of the highly directional characteristics of ultrasonic waves, it is possible to detect birds over a wide spatial range. The decrease in intensity is also reduced, and even if the output of the ultrasonic waves for object detection is further reduced, more reliable detection can be performed. Therefore, as mentioned above, in addition to minimizing the frequency of output of large-output ultrasonic waves for repelling birds, it is also possible to increase the output of ultrasonic waves for object detection without impairing the detection ability over a wide spatial range. Since it can be made smaller, harmful effects on the living environment can be more reliably eliminated.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In the bird repelling device according to the present invention, as shown in FIG. 1, a device main body 1 is supported by vibration-proof rubber legs 2 attached to the four corners of the bottom of the device. A speaker 3 that generates ultrasonic waves for repelling birds is built into the front of the device body 1.
Furthermore, a switch 4 is provided on the left side. A swinging mechanism (rotating means) 5 as a rotating mechanism section is installed on the top surface of the device main body 1.
The ultrasonic wave transmitting/receiving section 6 disposed on the top thereof is oscillated to periodically change the ultrasonic wave transmitting/receiving direction. The above ultrasonic transmitting/receiving section 6
It has a drip-proof structure (sealed structure) so that it can withstand outdoor use, and is formed into a horn shape to increase the directivity of ultrasonic waves.

As shown in FIG. 2, the ultrasonic transmitter/receiver 6 includes:
An ultrasonic transmitting circuit 7 and an ultrasonic receiving circuit 8 are connected, and a distance detecting circuit 9 is connected to the ultrasonic transmitting circuit 7 and the ultrasonic receiving circuit 8. The above ultrasonic transmitting/receiving section 6 and ultrasonic transmitting circuit 7
With the ultrasonic receiving circuit 8 and the distance detecting circuit 9,
Object detection means 10 is configured to send out relatively weak ultrasonic waves and receive the ultrasonic waves reflected back from an object to detect the presence of the object and the distance to the object.

An oscillation circuit 11 is connected to the distance detection circuit 9 described above. This oscillation circuit 11 operates based on the signal from the distance detection circuit 9 and outputs a high frequency signal, and is equipped with a timer (not shown) so that it outputs the high frequency signal for only a few seconds. ing. This oscillation circuit 11 includes
The speaker 3, which generates high-output ultrasonic waves for repelling birds using the high-frequency signal, is connected. These oscillation circuits 11 and speakers 3 provide a relatively large output for repelling birds when the object detection means 10 detects the presence of an object, and furthermore, when it is detected that the object has entered a predetermined distance range. A bird repelling ultrasonic wave generating means 12 is configured to send out ultrasonic waves for several seconds.

In the above configuration, when the switch 4 is operated, the ultrasonic transmitter/receiver 6 starts the swinging operation by the swinging mechanism 5. At the same time,
A transmission timing signal A is supplied from the distance detection circuit 9 to the ultrasonic transmission circuit 7. Ultrasonic transmitter circuit 7
outputs a transmission signal B corresponding to the above-mentioned transmission timing signal A to the ultrasonic transceiver section 6. Then, as shown in FIG. 3a, the ultrasonic transmitter/receiver 6 sends out ultrasonic waves with relatively weak output.

As shown in Figure b, the ultrasonic waves sent out from the ultrasonic transmitter/receiver 6 are reflected back when there is a bird in the direction that the ultrasonic transmitter/receiver 6 is facing, and are taken into the ultrasonic transmitter/receiver 6. It can be done. Ultrasonic transmitter/receiver 6
When the ultrasonic wave is taken in, a received signal C is output to the ultrasonic receiving circuit 8. Therefore, the receiving timing signal D is sent from the ultrasonic receiving circuit 8 to the distance detecting circuit 9.
is output.

The distance detection circuit 9 receives the transmission timing signal A
The time from when the signal D is output to when the reception timing signal D is input, that is, the time for traveling back and forth between the ultrasonic transmitter/receiver 6 and the bird (hereinafter referred to as propagation time)
Detect. The distance to the bird is calculated from this propagation time and the propagation speed of the ultrasonic wave.

When it is detected that a bird has entered a predetermined distance range, an oscillation timing signal E is output from the distance detection circuit 9 to the oscillation circuit 11. When the oscillation circuit 11 receives the oscillation timing signal E, it outputs a high frequency signal to the speaker 3. The speaker 3 receiving the high-frequency signal sends out a high-output ultrasonic wave for repelling birds, that is, an ultrasonic wave with a frequency that birds dislike, as shown in FIG.

In this way, the bird repelling device of the present invention repels birds using ultrasonic waves that birds do not like, and does not kill or capture birds, so it is possible to respect the spirit of nature conservation and animal welfare. I can do it. In addition, since ultrasonic waves cannot be heard by humans, it is possible to prevent situations that would worsen the living environment. moreover,
In the bird repelling device of the present invention, a high-output ultrasonic wave for repelling birds is sent out only after the presence of a bird is detected by the object detection means 10, so there are no problems associated with constantly sending out high-output ultrasonic waves. suppressed.

Furthermore, since the object detection means 10 is configured to be rotated periodically by the swinging mechanism 5, the sending range of the object detection ultrasonic waves sent out from the object detection means 10 into the space can be appropriately narrowed. Also, this transmission range changes periodically, making it possible to detect birds over a wide range. Therefore, it is possible to detect birds over a wide spatial range, and
The highly directional characteristics of the ultrasonic waves are maintained, and the intensity of the ultrasonic waves that reflect back to the bird is less likely to decrease, allowing for more reliable detection even if the output of the ultrasonic waves for object detection is further reduced. It can be carried out. As a result, in addition to minimizing the output frequency of high-output ultrasonic waves for repelling birds, it is also possible to reduce the output of ultrasonic waves for object detection without impairing the detection ability over a wide spatial range. This makes it possible to more reliably eliminate harmful effects on the living environment.

Furthermore, in this embodiment, the configuration is such that it is possible to not only detect the presence of a bird but also detect the distance from the bird repellent device to the bird, so for example, when a bird flies near the bird repellent device, the bird repellent It is possible to make adjustments such as making the output of ultrasonic waves for repelling birds a little weaker, while increasing the output of ultrasonic waves for repelling birds when birds fly a little further away.

Note that the frequency of the ultrasonic waves sent out from the ultrasonic transmitter/receiver 6 is, for example, 40 KHz to 200 KHz, and in this case, objects are detected within a distance range of 10 m to 2 m.

[Effect of idea]

As described above, the bird repelling device according to the present invention has an object detection means that transmits ultrasonic waves with a relatively low output and receives the ultrasonic waves reflected back from an object to detect the presence of the object. and bird-repelling ultrasonic wave generating means for transmitting bird-repelling ultrasonic waves with a relatively large output for a certain period of time when the presence of an object is detected by the object detecting means, and This configuration is provided with a rotating means for rotating the object detecting means so that periodic changes occur in the direction in which the ultrasonic waves are transmitted.

This makes it possible to detect birds over a wide spatial range, and maintains the highly directional characteristics of the ultrasound waves, which reduces the drop in the intensity of the ultrasound waves that reflect back to the birds. Even if the output of the ultrasonic waves for object detection is further reduced, more reliable detection can be performed. Therefore, in addition to minimizing the output frequency of high-output ultrasonic waves for repelling birds, the output of ultrasonic waves for detecting objects should also be made smaller without impairing the detection ability over a wide spatial range. Therefore, it is possible to more reliably eliminate harmful effects on the living environment.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a perspective view showing the external structure of the bird repelling device, and FIG. 2 is a distance detection means and an ultrasonic wave generator for repelling birds. A block diagram showing the means; FIG. 3a is an explanatory diagram showing a state in which ultrasonic waves are being transmitted from an ultrasonic transmitter/receiver section; FIG. 3b is an explanatory diagram showing a state in which ultrasound waves are reflected by a bird; Figure c is an explanatory diagram showing a state in which ultrasonic waves for repelling birds are being sent out. 1 is the main body of the device, 3 is a speaker, 5 is a swinging mechanism (rotating means), 6 is an ultrasonic transmitting/receiving unit, 7 is an ultrasonic transmitting circuit, 8 is an ultrasonic receiving circuit, 9 is a distance detection circuit, and 10 is an object Detection means, 11 is an oscillation circuit, 1
2 is an ultrasonic generating means for repelling birds.

Claims (1)

[Scope of utility model registration request] an object detection means for transmitting ultrasonic waves with a relatively low output and detecting the presence of the object by receiving the ultrasonic waves reflected back from the object; and the object detection means detects the presence of the object. and a bird-repelling ultrasonic wave generating means for sending out bird-repelling ultrasonic waves with a relatively large output for a certain period of time, and the above-mentioned object detection means is configured to cause periodic changes in the direction of sending out the ultrasonic waves from the object detection means. A bird repelling device characterized by being provided with a rotating means for rotating an object detecting means.