JP2015112098A - Vermin threatening apparatus and vermin threatening system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vermin threatening apparatus that makes vermin escape by effectively threatening the vermin without the use of sound waves in an audible range, causing noises, and a vermin threatening system.SOLUTION: A vermin threatening apparatus 1, which makes vermin escape to the outside of a predetermined area 10 by threatening the vermin intruding into the predetermined area 10, comprises ultrasonic irradiation means 11 for applying ultrasonic waves. The ultrasonic irradiation means 11 applies the ultrasonic waves with a frequency of 20-32 kHz and at a sound pressure level of 70 dB or more in the whole predetermined area 10. The applied ultrasonic waves threaten the vermin to make the vermin escape to the outside of the predetermined area 10.

Description

  The present invention relates to a pest and infestation device and a pest and intimidation system that threaten a pest that has entered a predetermined area and escapes it from the predetermined area.

  More than 90% of pests, especially wild boar repellents, are related to capture fences, protective fences, and repellents. In recent years, those using sound waves have been proposed (see, for example, Patent Document 1).

  As a device using sound waves, a repelling device and method based on this have been proposed, assuming that an output of 80 dB or more is effective in a low frequency range of 150 Hz to 800 Hz (see, for example, Patent Document 2). . As a supplement to the contents of Patent Document 2, there is an academic paper by the inventor (see Non-Patent Document 1). In Non-Patent Document 1, studies have been repeated from a low frequency of 5 Hz to a high frequency of 80 kHz.

  Moreover, what irradiates with a predetermined time interval is proposed, changing the frequency of the sound range of 15 kHz to 50 kHz continuously or randomly (for example, refer patent document 3).

JP 2009-159943 A JP 2010-246535 A JP 2008-11777 A

Yusuke Eguchi et al., “Research Using Olfactory and Auditory Stimulation for Development of Wild Boar Behavior Control Technology”, Azabu University Magazine, Azabu University, 2006, Vol. 13,14, p. 178-182

  The bird and beast destroyer described in Patent Document 1 is set to repeat intermittent sound wave transmission operation between 100 Hz and a maximum of 50 kHz. If it is this frequency, it will be heard enough by humans. When aiming at repelling with a large output, noise is a problem.

  The harmful animal repellent device described in Patent Document 2 uses sound waves in a low frequency range of 150 Hz to 800 Hz. Further, in Non-Patent Document 1, it is stated that the repelling effect is recognized in a sound range of around 200 Hz, and it is added that the repelling effect is not particularly recognized when ultrasonic waves are irradiated for a short time. For this reason, the harmful animal repellent device described in Patent Document 2 has the same problem as the bird and animal destroyer described in Patent Document 1.

  In Patent Document 3, there is a description that a repellent effect is recognized even in an ultrasonic wave (generally 20 kHz or more), but it is a mixed use with a low-frequency sound wave, and an effect of only the ultrasonic wave and a correlation with a sound pressure level are shown. However, as in Patent Documents 1 and 2, it is understood that sound waves in a low frequency range (audible range) are necessary for repelling birds and beasts.

  An object of the present invention is to provide a harmful animal threatening device and a harmful animal threatening system which can effectively threaten and escape a harmful animal without using an audible sound wave that causes noise.

  The present invention is a pest threatening device that threatens a pest that has entered a predetermined area and escapes outside the predetermined area, comprising ultrasonic irradiation means for irradiating ultrasonic waves, wherein the ultrasonic irradiation means has a frequency Is a harmful animal and animal intimidation device that irradiates ultrasonic waves of 20 dB to 32 kHz and a sound pressure level of 70 dB or more in the entire predetermined area.

  According to the present invention, the harmful animal can be threatened and escaped by the ultrasonic wave, so it is not necessary to use an audible sound wave that causes noise, and is harmless to humans. In particular, harmful animals can be threatened effectively by setting the frequency of ultrasonic waves to be irradiated to 20 kHz to 32 kHz and the sound pressure level to 70 dB or more.

  Also, in the present invention, the ultrasonic irradiation means includes a plurality of speakers that output ultrasonic waves, and the speakers can irradiate ultrasonic waves in the outer edge direction of the predetermined area and can irradiate the entire area of the predetermined area. It is installed in.

  According to the present invention, since the ultrasonic waves are irradiated in the outer edge direction of the predetermined area where the invading pests should be prevented, the pests can be effectively escaped outside the predetermined areas.

  Further, the pest threatening apparatus of the present invention further includes a control unit that outputs an irradiation signal for irradiating the ultrasonic irradiation unit with ultrasonic waves, and the control unit outputs the time for outputting the irradiation signal and the irradiation signal. A timer capable of setting a non-operation time, and ultrasonic waves are emitted by the ultrasonic wave irradiation means when the control means is outputting the irradiation signal.

  According to the present invention, it is possible to arbitrarily set the timing of irradiating ultrasonic waves. For example, it is possible to irradiate pulsed ultrasonic waves and to suppress the acclimatization of harmful animals to ultrasonic waves by intermittent irradiation. .

  The pest threatening device of the present invention further includes an ultrasonic reflection unit that reflects the ultrasonic wave emitted from the ultrasonic irradiation unit, and the ultrasonic irradiation unit and the ultrasonic reflection unit cover the entire predetermined area. It is characterized by irradiating ultrasonic waves.

  According to the present invention, since the ultrasonic wave can be reflected by the ultrasonic wave reflecting means, the ultrasonic wave irradiation range can be set flexibly. It is also possible to change the direction of the ultrasonic wave by the ultrasonic wave reflection means and to intimidate by irradiating the ultrasonic wave so as to guide the harmful animal to the place where the shark or the like is installed.

  In the present invention, the ultrasonic wave reflection means can reflect the ultrasonic wave irradiated from the ultrasonic wave irradiation means radially.

  According to the present invention, the ultrasonic wave can be reflected radially by the ultrasonic wave reflection means, which is efficient.

  The present invention also provides ultrasonic irradiation means for irradiating ultrasonic waves, ultrasonic reflection means for reflecting ultrasonic waves emitted from the ultrasonic irradiation means, and an irradiation signal for irradiating the ultrasonic irradiation means with ultrasonic waves. A pest threatening device including a control means for outputting, and a detection means for outputting a detection signal when detecting a pest that has entered a predetermined area, and outputting the detection signal when the detection means detects the pest. The control unit outputs the irradiation signal based on the detection signal, irradiates the ultrasonic wave from the ultrasonic wave irradiation unit, and the ultrasonic wave irradiated from the ultrasonic wave irradiation unit and the ultrasonic wave reflected by the ultrasonic wave reflection unit. It is a beast threat system characterized by threatening harmful animals with sound waves.

  According to the present invention, ultrasonic waves are emitted when a pest is detected by the detection means, which is efficient. Further, since the traveling direction of the ultrasonic wave can be changed by the ultrasonic wave reflection means, the ultrasonic wave irradiation range can be set flexibly. Furthermore, by using a combination of multiple ultrasonic irradiation means, ultrasonic reflection means, and detection means, it is possible to finely set the irradiation direction of ultrasonic waves for each specific area within a predetermined area, and more effectively threaten harmful animals. It is also possible to escape.

  In addition, the pest threatening system according to the present invention includes the pest threatening device.

  Since the harmful animal and animal threatening system and the harmful animal and animal threatening system of the present invention threaten and escape the harmful animal using only ultrasonic waves, it is not necessary to use sound waves in the audible range that cause noise. For this reason, it can be widely used without being restricted by the output (sound pressure level) of the ultrasonic wave, the installation location, the time zone, and the like. In particular, it is possible to effectively threaten and escape harmful animals by setting the frequency of ultrasonic waves to be radiated from 20 kHz to 32 kHz and the sound pressure level to 70 dB or more. Furthermore, by using the ultrasonic reflection means, it is possible to flexibly set the ultrasonic irradiation range and traveling direction, and it is possible to effectively intimidate and escape harmful animals.

It is a perspective view which shows the installation state of the pest and threatening device 1 of 1st Embodiment of this invention. It is a figure which shows the structure of the pest threatening apparatus 1 of FIG. It is a top view which shows the installation state of the pest and threatening device 2 of 2nd Embodiment of this invention. It is a principal part perspective view of the harmful animal threatening apparatus 3 of 3rd Embodiment of this invention. It is a perspective view of the pest threatening system 4 of 4th Embodiment of this invention. It is a figure which shows the structure of the pest threatening system 4 of FIG. It is a figure for demonstrating the predetermined area of this invention. 1 is a schematic diagram of a breeding cage 101 and a test apparatus 110. FIG. It is a graph which shows the result of the threat test with respect to the wild boar 100 using the test apparatus 110 of FIG. It is a graph which shows the result of the threat test with respect to the wild boar 100 using the test apparatus 110 of FIG. It is a graph which shows the result of the threat test with respect to the wild boar 100 using the test apparatus 110 of FIG. It is a graph which shows the activity result of the wild boar 100 at the time of ultrasonic non-irradiation. It is a graph which shows the result of the threat test with respect to the wild boar 100 using the test apparatus 110 of FIG. It is a graph which shows the result of the threat test with respect to the wild boar 100 using the test apparatus 110 of FIG. It is a graph which shows the result of the threat test with respect to the wild boar 100 using the test apparatus 110 of FIG.

  FIG. 1 is a perspective view showing an installed state of a pest threatening apparatus 1 according to the first embodiment of the present invention. FIG. 2 is a diagram showing a configuration of the pest threatening device 1 of FIG. The pest infestation apparatus 1 of the first embodiment of the present invention includes an ultrasonic irradiation unit 11 and applies ultrasonic waves to a pest that has entered a predetermined area 10 that should prevent the invasion of pests such as fields and roads. Irradiate and intimidate and escape the pests.

  The ultrasonic irradiation means 11 includes a speaker 21 for irradiating ultrasonic waves, a main body 22 having an ultrasonic oscillator 31, an amplifier 32, and a control unit 33, and a column 23 for fixing the speaker 21. The oscillated ultrasonic wave is amplified by the amplifier 32 and irradiated from the speaker 21.

  The speaker 21 is installed so as to be able to radiate ultrasonic waves throughout the predetermined area 10. The speaker 21 is not limited to a specific one, and a known one can be appropriately selected and used, and may have a swing function or the like.

  The ultrasonic oscillator 31 oscillates an ultrasonic wave having a single frequency, an ultrasonic wave having a certain width, or an ultrasonic wave combining a plurality of frequencies in a frequency range of 20 kHz to 32 kHz. As the ultrasonic oscillator 31, a known one using a piezoelectric element or the like can be appropriately selected and used.

  The amplifier 32 amplifies the sound pressure level of the ultrasonic wave oscillated by the ultrasonic oscillator 31 and irradiates it from the speaker 21. The amplifier 32 may be any amplifier that can amplify the sound pressure level of the ultrasonic wave so that the sound pressure level of the ultrasonic wave emitted from the speaker 21 is 70 dB or more in the entire area of the predetermined area 10. It can be selected and used.

  The control unit 33 has a function of causing the ultrasonic oscillator 31 to oscillate ultrasonic waves by outputting an irradiation signal, and controls the oscillation and stoppage of ultrasonic waves by the ultrasonic oscillator 31. For example, the control unit 33 outputs an irradiation signal when an ultrasonic irradiation button (not shown) provided on the main body 22 is pressed. The method for causing the control unit 33 to output the irradiation signal is not limited to the above-described method, and a method for outputting the irradiation signal when a pest is detected using a sensor (not shown) or the like of the main body 22 The irradiation signal may be output whenever the power is on.

  In addition, a timer function is added to the control unit 33, and the time for outputting and stopping the irradiation signal is controlled by the timer function so as to oscillate pulse ultrasonic waves and / or oscillate ultrasonic waves intermittently. You can also

  The column 23 is a columnar pile, and is fixed to the ground, and the speaker 21 is attached to the column part. In addition, the pest threatening apparatus 1 may be configured such that the speaker 21 and the main body 22 are integrally formed without using the support column 23.

  The pest threatening device 1 configured as described above is installed around the field or on the side of the road so that the ultrasonic wave is irradiated to the entire area of the predetermined area 10, and when an irradiation signal is output from the control unit 33. An ultrasonic wave having a frequency of 20 kHz to 32 kHz and a sound pressure level of 70 dB or more is irradiated on the entire predetermined area 10 to threaten the pests. As will be described later, harmful animals, particularly wild boars, dislike ultrasonic waves having a frequency of 20 kHz to 32 kHz and a sound pressure level of 70 dB or higher. Therefore, the harmful animals can effectively escape the harmful animals.

  The Pest Beast Intimidation Device 1 can intimidate and escape the pests using only ultrasound without using sound waves in the audible range, so it does not cause noise and is not subject to restrictions on installation location or time zone can do.

  FIG. 3 is a plan view showing an installed state of the pest threatening apparatus 2 according to the second embodiment of the present invention. The same components as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted. In the pest and intimidation device 2 of the second embodiment, the speaker 21 is installed in the center of the predetermined area 10 and irradiates ultrasonic waves toward the outer edge of the predetermined area 10.

  The pest threatening device 2 of the second embodiment includes four speakers 21 and is arranged so that the four speakers 21 face in all directions. The number of speakers 21 is not limited to a specific number, and for example, eight speakers 21 may be installed so as to face in all directions. The main body 22 is installed outside the predetermined area 10, but is not limited to this. The main body 22 may be installed in the vicinity of the column 23, or may be configured integrally with the speaker 21. Good.

  Since the ultrasonic wave attenuates as it progresses, when the speaker 21 is installed at the center of the predetermined area 10 as described above and the ultrasonic wave is irradiated toward the outer edge of the predetermined area 10, the sound pressure is reduced at the central part of the predetermined area 10. The level is high and the sound pressure level is relatively low at the outer edge. For this reason, a pest is guided toward the outer edge of the predetermined area 10 having a relatively low sound pressure level, and the pest can be effectively escaped from the predetermined area 10.

  FIG. 4 is a perspective view of an essential part of the pest and threatening device 3 according to the third embodiment of the present invention. The same components as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted. The pest threatening apparatus 3 according to the third embodiment includes ultrasonic reflection means 12 that reflects ultrasonic waves emitted from the speaker 21.

  The ultrasonic reflection means 12 is a cylindrical body having a tip portion 35 formed in a conical shape, and is formed of a material that reflects ultrasonic waves. The material of the ultrasonic reflection means 12 is preferably a material that has a small attenuation when the ultrasonic waves are reflected. As such a material, for example, a material using aluminum, a steel material subjected to heat treatment, or the like can be given.

  The pest threatening apparatus 3 according to the third embodiment is installed, for example, in the center of a predetermined area 10, the speaker 21 is installed downward, and the ultrasonic reflection means 12 is installed directly below the tip 35. Thus, the ultrasonic wave emitted from the speaker 21 can be reflected by the tip portion 35 of the ultrasonic wave reflection means 12 and can be emitted radially in all directions toward the outer edge of the predetermined area 10.

  The method of using the ultrasonic reflecting means 12 is not limited to a specific method. For example, the ultrasonic reflecting means 12 is installed with the speaker 21 facing upward and the tip 35 facing downward. May be.

  Further, the shape of the ultrasonic reflecting means 12 is not limited to a specific shape. For example, the ultrasonic wave may be reflected radially upward or downward by using a convex hemispherical shape or a concave hemispherical shape. In addition, the shape can be determined as appropriate according to the application and installation location. Furthermore, irregularities and protrusions may be provided on the surface of the ultrasonic reflecting means 12 so that the ultrasonic waves are irregularly reflected.

  By using the ultrasonic reflection means 12 in this way, it is possible to radiate ultrasonic waves radially in all directions, so the number of speakers 21 can be reduced when irradiating ultrasonic waves in the outer edge direction of the predetermined area 10. In addition to being able to reduce, variations in the use and installation location of the pest and threatening device 3 are widened.

  FIG. 5 is a perspective view of the pest threatening system 4 of the fourth embodiment of the present invention. FIG. 6 is a diagram showing a configuration of the pest and threat system 4 of FIG. The same components as those of the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.

  The pest and intimidation system 4 of the fourth embodiment includes a pest and intimidation device 1 of the first embodiment, an ultrasonic reflection unit 15 that reflects ultrasonic waves, and a detection unit 16 that detects a pest in a predetermined area 10. The external input means 17 is provided, and when a pest is detected by the detection means 16, ultrasonic waves are emitted from the pest threatening device 1 to threaten and escape the pest.

  The ultrasonic reflection means 15 are alternately arranged horizontally on both sides in the longitudinal direction of the predetermined area 10 so that the ultrasonic wave irradiated from the speaker 21 of the pest and animal threatening device 1 is reflected and reaches the entire area of the predetermined area 10. .

  The detection means 16 includes an infrared sensor (not shown) and a moving body sensor (not shown), detects a pest by heat and movement, and outputs a detection signal to the control unit 33 when the pest is detected. A plurality of detection means 16 are fixed to the column 23 so as to be able to detect harmful pests throughout the predetermined area 10.

  The external input means 17 includes an input button 41 and is fixed to the support column 23 outside the predetermined area 10 (detection range of the detection means 16). The external input means 17 outputs an external input signal to the control unit 33 when the input button 41 is pressed.

  The basic function of the control unit 33 is the same as that of the control unit 33 of the pest and animal threatening device 1 of the first embodiment, but conditions for outputting an irradiation signal to the ultrasonic oscillator 31 are added. The control unit 33 outputs an irradiation signal to the ultrasonic oscillator 31 when a detection signal is input from the detection means 16. Further, the irradiation signal is not output within a predetermined time from the input of the external input signal from the external input means 17 regardless of whether the detection signal is input from the detection means 16 or not. It should be noted that the time during which the irradiation signal is not output by the input of the external input signal may be set in advance by providing a separate timer inside the control unit 33.

  In the pest threatening system 4 configured as described above, when the detection means 16 detects a pest, a detection signal is output to the control unit 33, and when the detection signal is input to the control unit 33, the control unit 33 outputs an ultrasonic wave. An irradiation signal is output to the oscillator 31 and ultrasonic waves are irradiated from the speaker 21. The ultrasonic wave irradiated from the speaker 21 is reflected by the ultrasonic wave reflection means 15 and irradiated to the entire area of the predetermined area 10.

  Further, when passing through the predetermined area 10 with a pet or the like, when the input button 41 of the external input means 17 is pressed, the external input means 17 outputs an external input signal to the control unit 33, and the control unit 33 is externally connected. Since the control unit 33 does not output the irradiation signal for a predetermined time after the input signal is input, the pet can be passed through the predetermined area 10 without being irradiated with ultrasonic waves.

  When the pest threatening system 4 is used, the detection means 16 emits ultrasonic waves when the pest is detected, which is very efficient. Further, the traveling direction of the ultrasonic waves can be changed by the ultrasonic reflecting means 15, and the ultrasonic waves can be efficiently irradiated to the entire area of the predetermined area 10. In addition, a trap (not shown) such as a capture trap is provided near the end of the predetermined area 10 where the sound pressure level is relatively low in the traveling direction of the ultrasonic wave, and a pest is guided toward the trap. Is possible.

  In addition, in the pest threatening system 4 of the present invention, the shape and the installation method of the ultrasonic reflecting means 15 are not limited to a specific one, and for example, are provided over the entire length of the predetermined area 10 in the longitudinal direction. It may be provided above and below. The ultrasonic reflecting means 15 may be provided with irregularities and protrusions on the surface to diffusely reflect ultrasonic waves.

  The detection unit 16 is not limited to the infrared sensor and the moving body sensor, and only one of them may be used, or another detection unit, for example, a camera (not shown) may be used. When a camera is used as the detection means 16, image analysis means (not shown) for analyzing the video captured by the camera and discriminating the pests is added to the detection means 16 or the control unit 33, and other than the pests and the pests. A detection signal or an irradiation signal may be output when it is determined that the animal is a pest and the animal is a pest.

  The method for discriminating between a pest and an animal other than the pest is not limited to a specific method, and a method of arranging the sensor height of the detection means 16 according to the length of the pest or a pest specific A method of discriminating the body temperature and movement of the body with an infrared sensor and / or a moving body sensor can be employed.

  Moreover, although the detection means 16 and the external input means 17 were fixed using the support | pillar 23, it is not limited to this, For example, you may be integrally attached to the pest threatening apparatus 1 and the road is predetermined. When the pest and animal threat system 4 is used as the area 10, it may be attached to a utility pole (not shown). Similarly, the speaker 21 may be attached to a utility pole or the like.

  Further, the control unit 33 is provided with a pest determination means for determining whether the detected detection signal is based on the ON / OFF switching speed or pattern of the detection signal, and is a pest or an animal other than a pest. An irradiation signal may be output when the determination is made.

  The external input means 17 includes, instead of the input button 41, a transmitter (not shown) attached to a pet or the like and a receiver (not shown) that receives a signal from the transmitter, and receives the signal from the transmitter as a receiver. When the signal is received, an external input signal may be output to the control unit 33.

  As described above, the pest and intimidation device and the pest and intimidation system of the present invention have been described using the pest and intimidation devices 1, 2 and 3 and the pest and intimidation system 4 of the first to fourth embodiments. The pest threatening device and the pest threatening system are not limited to the above-described embodiment, and can be modified and used without changing the gist.

  For example, a sound pressure level meter (not shown) is installed at the outer edge of the predetermined area 10 to measure the sound pressure level of the ultrasonic wave irradiated from the pest threatening apparatus 1 and feeding back to the pest threatening apparatus 1. A feedback control means for automatically adjusting the amplifier 32 may be added so that the sound pressure level is always 70 dB or more at the outer edge of 10.

  Further, an opening of the speaker 21 or a vibrator (not shown) that oscillates ultrasonic waves is placed in contact with a structure (not shown) such as a wall or a pipe, and ultrasonic waves are propagated through the structure to It is also possible to configure a pest threat device or a pest threat system so as to threaten and escape the pests in the object.

  Further, the predetermined area which is an area where the invading pests should be prevented and which is irradiated with ultrasonic waves is not limited to the rectangular area as shown in FIG. Arbitrarily shaped areas are included. Moreover, as shown in FIG.7 (b), it is good also considering only the outer peripheral part of a certain area as a predetermined area. As shown in FIG. 7B, if only the outer peripheral portion is set as the predetermined area, it is possible to efficiently prevent the invading of the pest even in a wide area.

  Furthermore, the predetermined area may be only a part of a certain area as shown in FIG. For example, it is very efficient if an area where it is difficult to install an electric fence due to geographical conditions or the like in a large field is defined as a predetermined area and ultrasonic waves are applied only to that area. If the fence and the pest-intimidation device or the pest-intimidation system of the present invention are used in combination, the invasion of the pest can be efficiently prevented. Note that the predetermined area and the pest detection range do not have to match.

  FIG. 8 is a schematic diagram of the breeding cage 101 and the test apparatus 110. 8 indicates the detection range 115 of the sensor unit 111. The basic configuration of the test apparatus 110 is the same as that of the pest and animal threatening device 1 and the harmful animal and animal threatening system 4.

  Three wild boars (Uribou) 100 were captured and reared in a rearing cage 101. Although details such as the age of the cormorant as the subject are unknown, it was captured 3 to 4 months (estimated) after birth and exposed to the test for about half a year. The initial body length was about 40 cm from the tip of the nose to the end of the trunk (excluding the tail), and was about 60 cm at the end of the test.

  A drinking fountain 102 was provided in the breeding tub 101, and a constant amount of livestock feed was given every morning. The breeding cage 101 has a height H of 1.88 m, an overall length L of 3.98 m, and a width of 1.44 m. The wild boar 100 heads unavoidably to the one drinking fountain 102 installed. In confirming the threatening effect, the effect was estimated by quantitatively measuring how much the wild boar 100 had entered the vicinity of the drinking fountain 102.

  The test apparatus 110 includes a sensor unit 111 (infrared sensor and moving body sensor) that detects the presence of a subject (boar) 100, a control unit 112, and a speaker 113 that emits ultrasonic waves. When the wild boar 100 enters the detection range 115 of the sensor unit 111, the sensor unit 111 detects the wild boar 100, and the control unit 112 irradiates ultrasonic waves from the speaker 113. The detection range 115 of the sensor unit 111 and the ultrasonic irradiation range of the speaker 113 were set to coincide.

  The control unit 112 can change the setting of the ultrasonic frequency, pulse period, and irradiation time, and further includes an amplifier (not shown) that adjusts the sound pressure level of the ultrasonic wave and a detection range 115 of the sensor unit 111. A data logger (not shown) that records the accumulated time of entry of the wild boar 100 as data;

  Table 1 shows the relationship between the gain of the amplifier when the frequency is set to 20 kHz and the sound pressure levels at the 1 m and 2 m points from the speaker 113. The ambient sound at this time was 55 dB.

  Table 2 shows the relationship between the gain of the amplifier when the frequency is set to 25 kHz and the sound pressure levels at the 1 m and 2 m points from the speaker 113. The ambient sound at this time was 55 dB.

  In order to examine the behavior pattern of the wild boar 100 under non-ultrasound irradiation, data for about 20 days from October 4 to October 22 was acquired, and the average value was defined as background BG1. The test was performed with the frequency of the ultrasonic wave to be irradiated being 10 kHz, 15 kHz, 20 kHz, 25 kHz, and 30 kHz. The typical test results are shown below.

<Example 1>
The sensor unit 111 and the speaker 113 are installed on the ceiling near the drinking fountain 102, the frequency of the ultrasonic wave to be irradiated is set to 20 kHz, the gain of the amplifier is set to 80%, and the activity data of the boar 100 is obtained from October 24 to October 27. Acquired for 4 days until the day (see FIG. 9). The vertical axis in FIG. 9 indicates the accumulated time (seconds) when the wild boar 100 has entered the detection range 115 of the sensor unit 111, and the horizontal axis indicates the time. Hereinafter, the same applies to the vertical and horizontal axes up to FIG.

  On the first day and the second day immediately after the irradiation, it is temporarily excited by the irradiation of the ultrasonic wave, and shows an activity greatly exceeding the background BG1. At first glance, it seemed to be ineffective. However, from the third day onward, there was a tendency for activities (intrusion into the drinking fountain 102) to be significantly suppressed.

  After the start of the test, it is considered that it was a period that required learning, in which area of the breeding cage 101 the ultrasonic irradiation started and which area was the non-irradiated area. The wild boar 100 is surprised at the ultrasonic irradiation area every time it stops at the drinking fountain 102 and is considered to have been active intensely for a while. From the third day, the area of activity was dramatically limited by itself, and as much as possible, it stayed in an area that was not irradiated with ultrasonic waves.

  Subsequently, wild boar 100 activity data was acquired for 8 days from October 28 to November 4 under the same conditions (see FIGS. 10 and 11). As shown in FIG. 10 and FIG. 11, a remarkable activity suppression effect was recognized as compared with the background BG1. There is no big difference between the first four days, the temperature and the weather, and it is difficult to constrain activities due to the influence of the weather. Although there was some variation, we succeeded in significantly reducing the activities of the wild boar 100.

<Comparative Example 1>
After selecting several frequencies and conducting a similar test, activity data of the wild boar 100 was acquired for three days from November 10 to November 12 in a state where irradiation of ultrasonic waves was stopped. FIG. 12 shows the average value (non-irradiation) of the data for 3 days and the background BG1. As soon as the irradiation of the ultrasonic wave was stopped, an active activity comparable to the background BG1 was started.

<Example 2>
Next, the position of the speaker 113 was changed, and the influence of the familiarity of the wild boar 100 was evaluated. In the first embodiment, there is a drinking fountain 102 on the left side of the breeding cage 101, the detection range 115 of the sensor unit 111 is fixed, and ultrasonic irradiation is performed from above the drinking fountain 102. At this time, the bed of the wild boar 100 was in a fixed position at the right end of the rearing cage 101. The drinking fountain 102 was not changed, and the positions of the sensor unit 111 and the speaker 113 were changed to the vicinity of the bed of the wild boar 100.

  Since several months have already passed, the background BG2 was remeasured for 18 days from December 25 to January 11. The background BG2 this time is counted as an intrusion time when it is active near the bed (detection range 115 of the sensor unit 111), and is not counted if the activity is kept for a certain time after the invasion.

  The frequency of the ultrasonic wave to be irradiated was set to 25 kHz, the gain of the amplifier was set to 80%, and activity data of the wild boar 100 was acquired for three days from January 12 to January 14 (see FIG. 13). The wild boar 100 hates the irradiation of ultrasonic waves and avoids the detection range 115 of the sensor unit 111. A new fixed position is provided in the center of the drinking fountain 102 on the left side of the rearing cage 101 and the bed on the right side. It is considered that the wild boar 100 hates the ultrasonic irradiation stored in memory even though the ultrasonic irradiation is stopped from above the drinking fountain 102.

<Comparative Example 2>
The frequency of the ultrasonic wave to be irradiated was set to 25 kHz, the gain of the amplifier was set to 30%, and the activity data of the wild boar 100 was acquired for 6 days from December 8 to December 13 (see FIGS. 14 and 15). The background BG3 newly acquired data. At this time, the positions of the sensor unit 111 and the speaker 113 were set near the bed of the wild boar 100.

  As shown in FIGS. 14 and 15, when the gain of the amplifier is set to 30% (sound pressure level less than 70 dB), the threatening effect on the wild boar 100 is low.

<Comparative Example 3>
When approaching the drinking fountain 102, the situation was such that a 1 kHz sound was generated from the vicinity of the drinking fountain 102. The wild boar 100 was living with a regular rhythm, even though it was trying to send sound for intimidation. There was no intimidating effect even when stimulation was applied at a relatively high volume at 1 kHz.

1, 2, 3 Pest control system 4 Pest control system 10 Predetermined area 11 Ultrasonic irradiation means 12, 15 Ultrasonic reflection means 16 Detection means 21 Speaker 33 Control unit

Claims (7)

A pest intimidation device that threatens a pest that has entered a predetermined area and escapes outside the predetermined area,
Equipped with ultrasonic irradiation means for irradiating ultrasonic waves,
The harmful animal and animal threatening device, wherein the ultrasonic wave irradiation means irradiates ultrasonic waves having a frequency of 20 kHz to 32 kHz and a sound pressure level of 70 dB or more in the entire predetermined area. The ultrasonic irradiation means includes a plurality of speakers that output ultrasonic waves,
2. The pest and animal threat device according to claim 1, wherein the speaker is installed so as to irradiate ultrasonic waves in an outer edge direction of the predetermined area and to be able to irradiate ultrasonic waves to the entire predetermined area. Furthermore, it comprises a control means for outputting an irradiation signal for irradiating the ultrasonic irradiation means with ultrasonic waves,
The control means includes a timer capable of setting a time for outputting the irradiation signal and a time for not outputting the irradiation signal,
The harmful animal and animal threatening apparatus according to claim 1 or 2, wherein the ultrasonic wave is irradiated by the ultrasonic wave irradiation unit when the control unit is outputting the irradiation signal. Furthermore, an ultrasonic reflection means for reflecting the ultrasonic wave irradiated from the ultrasonic irradiation means,
4. The pest and animal threatening apparatus according to claim 1, wherein the ultrasonic wave irradiation unit and the ultrasonic wave reflection unit irradiate ultrasonic waves over the entire predetermined area. 5.   The harmful animal and animal threatening device according to claim 4, wherein the ultrasonic wave reflection means is capable of radially reflecting the ultrasonic wave emitted from the ultrasonic wave irradiation means. Ultrasonic irradiation means for irradiating ultrasonic waves, ultrasonic reflection means for reflecting ultrasonic waves emitted from the ultrasonic irradiation means, and control means for outputting an irradiation signal for irradiating the ultrasonic irradiation means with ultrasonic waves Pest intimidation equipment including,
A detection means for outputting a detection signal when a pest that has entered the predetermined area is detected;
When the detection means detects a pest, the detection signal is output, and the control means outputs the irradiation signal based on the detection signal, irradiates the ultrasonic wave from the ultrasonic irradiation means, and irradiates from the ultrasonic irradiation means. A pest and threatening system characterized by threatening a pest with a reflected ultrasonic wave and an ultrasonic wave reflected by the ultrasonic reflecting means.   The harmful animal / beast threatening device according to claim 6, wherein the harmful animal / beast threatening apparatus is the harmful animal / beast threatening apparatus according to claim 4.

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