KR20210101423A - Birds control system using radar - Google Patents

Abstract

The present invention provides a bird repelling system using radar, which generates ultrasonic waves of a frequency that birds hate to repel birds. According to the present invention, the bird repelling system comprises: a radar transmitting unit for transmitting and receiving a radar signal; a signal processing unit encoding radar-related information received from the radar transmitting unit and performing digital signal processing for signal analysis; a radar module detecting an approach of birds within a predetermined area on the basis of a result signal of the signal processing unit and extracting location information of the detected bird; a controller determining whether the bird has approached a pre-designated area on the basis of the location information received from the radar module and instructing an operation for repelling the bird according to a determination result; a directional speaker rotating in a bird approach direction according to a command received from the controller and directionally generating ultrasonic waves at or above the human audible frequency; and a communication module communicating information received from the controller to display and monitor approach status on a display of a remote controller.

Description

Bird control system using radar {BIRDS CONTROL SYSTEM USING RADAR}

The present invention relates to a system for repelling birds using radar, in particular, detecting the approach of birds using radar, installing a directional speaker in the detection direction of the approach of the birds, and using the directional speaker to generate ultrasonic waves of a frequency that birds avoid, It is about a system to combat algae.

Currently, various methods are being used to prevent bird access. Among various industrial facilities, there are many cases in which electrical accidents caused by birds approach or corrosion caused by bird droppings at major facilities such as distribution lines and transformers disrupt the operation of power generation and substation facilities. These electrical accidents and corrosion cause the power through the power generation and distribution lines to be cut off, and due to the power cut, the power cut off damages the receiving areas such as businesses or residential areas in production, causing enormous damage.

There are a number of prior art for improving these problems. For example, in Korean Patent Registration No. 10-1897693 "Distribution line with bird repelling function", a bird repellent is installed in the distribution line to prevent birds. However, this method requires the direct replacement of the algae repellent at regular intervals, and if it flows to the ground, it may affect the surrounding environment and other living organisms. In addition, some inventions related to intelligent bird repelling can be seen in the information on foreign patent applications. However, they lack a detailed description of how to detect algae, and there are many physical methods for exterminating algae, so there are many problems to be solved in applying them.

Generally, sensors for detecting bird approach include an optical camera, an ultrasonic sensor, and an active infrared sensor. In the case of an optical camera, it is a device that detects the movement of an object by analyzing a video image. However, since it is sensitive to changes in the surroundings such as weather or day and night environment, and it is necessary to accurately check the screen adjustment of the image, there is a problem in using it outside. Next, a widely used ultrasonic sensor is a sensor that detects motion by measuring changes in ultrasonic waves. Although the ultrasonic sensor has advantages of simple operation and low price, it is more sensitive to changes in the surrounding environment than an optical camera and can be used only in a limited area. In addition, the active infrared sensor is a sensor that measures the distance by calculating the return time of the irradiated laser beam. Since it has high resolution, it has an excellent bird detection function. However, it is difficult to operate it in a harsh working environment because it is sensitive to foreign substances and dust that interfere with the laser beam emitted from the infrared sensor.

In contrast, a radar sensor that measures the distance, speed, and movement direction of an object using the reflected wave of electromagnetic waves is not affected by changes in the surrounding environment and can always maintain high sensitivity, so it is in the limelight as a proximity sensor. are having a hard time

Also, ultrasonic speakers are widely used to combat algae. The ultrasonic speaker uses ultrasonic waves with an audible frequency or higher, so that it is almost inaudible to humans, but may serve to repel birds. However, the continuous or constant pattern of ultrasound is easily learned by the birds, and after a period of time, you can see the birds approaching again differently from the first time.

Therefore, a new system for major facilities is needed to combat algae.

The present invention detects the approach of birds using a radar with high resolution without being affected by the surrounding environment, and continuously generates ultrasonic waves of a frequency that birds avoid using a plurality of high-power directional speakers in the sensing direction to combat birds. The purpose is to provide a system.

In addition, the purpose is to prevent setbacks and damage to facility operation, such as electrical accidents caused by birds approaching in major electrical facilities such as distribution lines and transformers, or corrosion of electrical facilities due to bird droppings.

The problems to be solved by the present invention are not limited to those mentioned above, and other problems to be solved that are not mentioned will be clearly understood by those skilled in the art from the detailed description below.

According to an embodiment of the present invention, as a bird repelling system using radar, a radar transceiver for transmitting and receiving a radar signal, a signal for encoding radar-related information received from the radar transceiving unit and digital signal processing for signal analysis a plurality of radar modules comprising: a processing unit; and a detection unit configured to detect an approach of a bird within a predetermined area based on a result signal of the signal processing unit to extract position information of the detected bird; a controller that analyzes the radar module to determine whether or not a bird approaches a pre-designated area based on the received location information of the bird, and commands an operation to combat the bird according to the result; A plurality of directional speakers that automatically rotate in the direction of approaching the birds according to the command received from the controller and generate ultrasonic waves of 16 kHz to 18 kHz or higher, which are audible frequencies of people who do not like birds, in a directional direction with respect to the direction; and a communication module for communicating information from the controller to display and monitor the approach status on the display of the controller.

Provided is a bird control system using a radar that connects a camera module to the controller to capture a moment when a bird approaches a pre-designated area and displays the image on the display of the remote controller.

Including an algorithm based on deep learning in the controller, based on the bird location information supplied from the radar module or the image taken at the time of approach, learning and analyzing the approach and repelling pattern of the bird, and, accordingly, the ultrasonic wave of the directional speaker An avian repelling system using radar that adjusts the frequency and interval of speaker sweeps is provided.

The present invention has the effect of detecting the approach of a bird using a radar having high resolution without being affected by the surrounding environment, and generating ultrasonic waves of a frequency that the bird avoids using a high-power directional speaker in the sensing direction, thereby repelling the bird.

In addition, the present invention provides a system capable of confirming the effectiveness of the bird repelling system by photographing the image when detecting the approach of the bird, including a camera module.

In addition, the bird extermination system of the present invention learns and analyzes the approach pattern, evasion frequency, time period, etc. of birds, including algorithms based on deep learning, and provides a bird control system that guarantees accuracy and reliability in any environment. It works.

1 shows a schematic diagram of a system for combating algae according to the invention;
2 shows an ultrasonic radiation pattern of a directional speaker according to the present invention.
3 shows a block diagram of the algae repelling system according to the present invention;

BRIEF DESCRIPTION OF THE DRAWINGS The present invention can be better understood with reference to the following description and drawings, which are provided by way of illustration and not limit the scope of protection.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so as to be easily understood by those skilled in the art. However, the present invention may be implemented in various other forms, and the technical scope of the present invention is not limited to the embodiments described herein.

The radar sensor used in the embodiment according to the present invention is a principle of detecting electromagnetic waves reflected from a target by emitting electromagnetic waves, and analyzing desired information based on this. Although radar cannot distinguish the color or shape of objects as the human eye sees, it has the advantage of being able to detect objects in the dark, in fog or rain. The basic radar equation to understand the characteristics of a radar sensor is as follows:

…식(1)

… Formula (1)

here,

P _r is the reflected received power,

P _t is the transmit power,

G _t is the gain of the transmit antenna,

A _r is the effective aperture area of the receiving antenna,

σ is the radar diameter or the scattering coefficient of the target,

F is the pattern propagation factor

R _t is the distance from the transmitter to the target, and also

R _r represents the distance from the target to the receiver.

As described above, the radar sensor calculates information that can be acquired by analyzing the reflected signal. The distance to the target is calculated by measuring the arrival time of the reflected wave from which the transmitted signal returns, and the relative speed of the target is calculated as the Doppler frequency shift of the reflected wave. In addition, angle information used to analyze the mobility of the target may be calculated using the time and phase difference of reflected waves arriving at two or more receiving antennas. The measured values of the distance, speed, and angle are detected and analyzed every predetermined time to track the movement of the target, and the direction of the target is determined based thereon.

The radar sensor is a sensor having a long detection range and high stability compared to other sensors. In addition, it is a technology suitable for detecting objects outdoors with a sensor that can detect it regardless of weather and illumination. Currently, 24 GHz band vehicle radar sensors are widely used, but 77/79 GHz band (mmWave band) radar sensors with increased precision and resolution are being developed for industrial use. The radar sensor in the 77/79 GHz band has a resolution nearly 20 times higher than that in the 24 GHz band, so it can accurately detect not only people but also small birds.

The present invention includes a function that can accurately detect the approach of birds to a designated space using such a radar sensor module. The present invention also includes a plurality of ultrasonic directional speakers to combat the birds after detecting the approach of the birds. A directional speaker has directivity in a specific direction, and its directivity characteristics are expressed by directivity (Q) and directivity index (DI).

Here, directivity (Q) = sound pressure on the reference axis / sound pressure assuming omnidirectionality

Directivity index (DI) = 10 x log(Q).

For an omni-directional sound source, Q = 1, and the sharper the directivity of the sound source, the larger the Q and DI values on the reference axis. In an embodiment of the present invention, Q is about 6 and Q of a 40 degree x 20 degree directivity angle is about 60. The directivity angle refers to the angle of both points in the directivity pattern at which the sound pressure level on both sides of the reference axis becomes 6dB smaller than the sound pressure level of the reference axis. By using a directional speaker, it gives a directivity so as not to waste sound source energy in an unnecessary place, so it can be said that it is preferable to apply to the bird repellent of the present invention in terms of efficiency.

Therefore, a directional speaker is used taking into account the fact that the audible frequency range that humans and birds can hear is different. The directional speaker used here generates ultrasonic waves beyond the range that humans cannot hear. The general hearing range varies from person to person, but the frequency that humans can hear is usually around 16Hz to 18kHz. Accordingly, the directional speaker generates ultrasonic waves of 20 kHz or higher, which can only be felt by birds, with high intensity, so that the birds can be repelled without disturbing people.

Referring to Figure 1, a schematic diagram of a system for combating algae according to the present invention is described.

First, a number of radar modules are installed to radiate over the area to block bird access. The radar module can designate the radiated horizontal angle, azimuth, distance, resolution, etc. by setting parameters of the radar module. When the horizontal angle and azimuth angle of the radar module are narrowed, a greater distance is sensed. That is, when the area to be detected is set and the approach of birds to the area is detected, the controller of the bird control system according to the present invention changes the direction of the directional speaker (ultrasonic frequency, output intensity, etc.) according to the set conditions to generate ultrasonic waves. do. Then, the event status is transmitted to the remote controller so that it can be monitored remotely through wireless communication. Wireless communication may be performed through a network such as 4G LTE, or communication may be performed through a device such as a WiFi router.

The strength of the directional speaker can be adjusted according to a predetermined standard, and in this embodiment, a combination of four or more speakers is used according to the approach direction of the birds. It is known that if the loudspeaker intensity is 160dB or higher, it is physically damaged, if the loudspeaker intensity is 130dB, birds feel pain, and if the loudspeaker intensity is 80dB, it is enough to avoid approaching. In this embodiment, as shown in FIG. 2, one speaker is configured to generate ultrasonic waves with an intensity of 115 dB from the center at a horizontal angle of 60 degrees. As shown, since ultrasonic waves are transmitted with an intensity of 80 dB or more within the range to be detected, the approach of birds can be prevented.

3 is a block diagram of the algae repelling system according to the present invention is described. The bird control system 300 using radar according to the present invention includes a radar module 302 , a controller 304 , and a directional speaker 306 . The radar module 302 with a radar detection function digitally encodes the radar-related information received from the radar transceiver 302-1, the radar transceiver for transmitting and receiving a radar signal, and digitally according to the purpose of the present invention in the digital domain. Detection of detecting the approach of a bird within a predetermined area based on the signal processing unit 302-2 executing signal processing, and the result signal of the signal processing unit, extracting the position information of the detected bird and sending it to the controller 304 part 302-3. The radar transceiver 302-1 may determine the number of transmitter antennas and receiver antennas according to a desired resolution. In the present invention, two transmitter antennas and four receiver antennas are used to provide resolution for detecting small birds. The signal processing unit 302-2 includes components such as an analog to digital converter (ADC), a micro controller unit (MCU), and a digital signal processor (DSP), for example, a noise reduction algorithm, a filter algorithm, and a movement tracking algorithm. and various signal processing algorithms. The sensing unit 302 - 3 includes a detection parameter previously designated according to a given environment, and transmits the position information of the detected bird to the controller 304 .

The controller 304 of the bird extermination system 300 of the present invention determines whether the bird approaches the pre-designated area or is outside the pre-designated area based on the location information received from the radar module 302, and as a result Accordingly, the direction of the directional speaker 306 is automatically adjusted to generate ultrasonic waves toward the approaching bird. Then, the situation is notified to the remote controller through the communication module 310 and the approached location is displayed on the display. Additionally or alternatively, when detecting the approach of the bird, the approach situation may be photographed through the camera module connected to the controller 304 and the image may be transmitted to the remote controller through the communication module 310 .

In addition, by using an algorithm based on deep learning included in the controller 304, it is possible to track the image captured when the bird approaches and the bird location information supplied from the radar module 302, and analyze the approach pattern and the repelling pattern. . In addition, the accuracy and reliability of algorithms based on deep learning can be further improved by collecting the sensitive ultrasound frequency for each bird and the time period until extermination as learning data. The controller 304 including such an algorithm may detect the approach of a bird based on learning, adjust the ultrasonic frequency accordingly, and adjust the speaker sweep interval.

According to the present invention, a system that detects the approach of a bird using a radar with high resolution without being affected by the surrounding environment, and generates an ultrasonic wave of a frequency that the bird avoids using a high-power directional speaker in the sensing direction, thereby repelling the bird is provided

In addition, there is provided a system, including a camera module, capable of checking the effect of the bird repelling system by photographing the image when detecting the approach of the bird. In addition, it is equipped with a communication module to monitor bird approach detection and repelling status from the remote controller, collect and analyze related data based on deep learning to predict bird movement, and autonomously adjust the ultrasonic frequency and sweep time accordingly. system is provided.

Embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the specific structures are not limited to the above embodiment, and the present invention also includes any design modifications without departing from the main concept of the present invention. In addition, various modifications can be made to the present invention within the scope of the claims, and embodiments resulting from appropriate combinations of technical means described in other embodiments are also included within the technical scope of the present invention. In addition, components having the same effect described in the above embodiment may be substituted for each other.

The present invention can be used for repelling birds using radar.

Claims (3)

As a bird control system using radar,
A radar transceiver for transmitting and receiving a radar signal, a signal processing unit for encoding the radar-related information received from the radar transceiving unit and digital signal processing for signal analysis, and a signal processing unit within a predetermined area based on a result signal of the signal processing unit a plurality of radar modules comprising a detection unit for detecting the approach of a bird to extract location information of the detected bird;
a controller that analyzes the radar module to determine whether a bird approaches a pre-designated area based on the received location information of the bird, and commands an operation to combat the bird according to the result;
a plurality of directional speakers that automatically rotate in the direction of approaching the birds according to the command received from the controller and generate ultrasonic waves of 16 kHz to 18 kHz or higher, which are audible frequencies of people who do not like birds, in a directional direction with respect to the direction; and
and a communication module for communicating information from the controller to display and monitor the approach status on the display of the controller. The method of claim 1,
A bird control system using a radar that connects a camera module to the controller to capture a moment when a bird approaches a pre-designated area and displays the image on the display of the remote controller. 3. The method of claim 1 or 2,
Including an algorithm based on deep learning in the controller, based on the bird location information supplied from the radar module or the image captured at the time of approach, learning and analyzing the approach and repelling pattern of the bird, and accordingly the ultrasonic wave of the directional speaker Bird control system using radar that adjusts frequency and spacing of speaker sweeps.

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