JP6131518B1 - Pest repelling device and pest repelling method - Google Patents

Abstract

An object of the present invention is to provide a pest repelling device capable of intentionally generating an unpleasant sound and keeping a pest away. A pest detection unit detects an approach of a pest. When the approach of a pest is detected, the signal generator 20b outputs an output clock signal using a rectangular-wave CPU clock signal composed of a superposition of a plurality of sine waves, and the HI state of the output clock signal A series of output clocks that have changed from the first frequency to the second frequency by changing the L time corresponding to the LOW state of the output clock signal step by step at a predetermined time with the H time corresponding to Generate a signal. The signal amplifying unit 21 amplifies the amplitude of the generated series of output clock signals to at least twice the amplitude of the series of output clock signals. The sound output unit 11 converts a series of amplified output clock signals into sound and makes the sound heard by a pest. The iterative generation unit 20c repeatedly generates a series of output clock signals. [Selection] Figure 2

Description

  The present invention relates to a pest repellent device and a pest repellent method.

  2. Description of the Related Art Conventionally, there are various types of pest repelling devices that repel pests such as spiders, monkeys, bears, deers, and spiders using ultrasonic waves and light. Here, the ultrasonic wave means a sound wave having a high frequency (frequency) that is difficult to be heard by the human ear, and the human ear is said to be able to hear a sound wave having a frequency of 20 Hz to 20 kHz. .

  For example, in Japanese Unexamined Patent Application Publication No. 2009-159943 (Patent Document 1), Japanese Unexamined Patent Application Publication No. 2010-207175 (Patent Document 2), Japanese Unexamined Patent Application Publication No. 2015-1112098 (Patent Document 3), a sensor detects a pest. At the same time, there has been disclosed a pest repelling apparatus that emits ultrasonic waves having a frequency that is difficult to be heard by a human ear and that can be heard by a pest, to repel the pest. In addition, Japanese Utility Model Registration No. 3153448 (Patent Document 4) discloses a pest repelling apparatus for irradiating a pest by irradiating ultraviolet rays and white LEDs when the sensor detects the pest. .

  JP 2009-159943 A   JP 2010-207175 A   JP 2015-112098 A   Utility Model Registration No. 3153448

  However, pests have the property of getting used to simple ultrasound and light. In other words, the pests, even with simple ultrasonic waves or light, once feel dangerous and uncomfortable and escape, but if you listen to the same ultrasonic waves and the same light repeatedly, they will get used to it and will not escape .

  On the other hand, if you let a harmful animal hear a sound wave with a high frequency change and a noisy sound (unpleasant sound), you will feel uncomfortable or in danger and will never want to hear it again. Never appears again. The unpleasant sound causes unpleasantness, and a typical example is a sound (sound wave) that scratches the blackboard with a nail.

  Therefore, the present invention has been made to solve the above-described problems, and provides a pest repelling apparatus and a pest repelling method capable of intentionally generating an unpleasant sound and keeping a pest away. For the purpose.

  As a result of intensive studies, the present inventor has completed the novel pest repelling apparatus and pest repelling method according to the present invention. That is, the pest avoiding apparatus according to the present invention includes a pest detection unit, a signal generation unit, a signal amplification unit, a sound output unit, and a repetition generation unit. The pest detection unit detects the approach of a pest. When the approach of the pest is detected, the signal generator outputs an output clock signal using a rectangular-wave CPU clock signal composed of a superposition of a plurality of sine waves, and the HI of the output clock signal The H time corresponding to the state is made constant, and the L time corresponding to the LOW state of the output clock signal is changed stepwise for each predetermined time, thereby changing a series of changes from the first frequency to the second frequency. An output clock signal is generated. The signal amplifying unit amplifies the amplitude of the generated series of output clock signals to at least twice the amplitude of the series of output clock signals. The sound output unit converts the amplified series of output clock signals into sound, and causes the harmful animal to hear the sound. The repeat generation unit repeatedly generates the series of output clock signals.

  The pest avoidance method according to the present invention includes a pest detection step, a signal generation step, a signal amplification step, an audio output step, and a repeated generation step. The pest detection step detects the approach of a pest. When the approach of the pest is detected, the signal generation step outputs an output clock signal using a rectangular-wave CPU clock signal composed of a plurality of superimposed sine waves, and the HI of the output clock signal The H time corresponding to the state is made constant, and the L time corresponding to the LOW state of the output clock signal is changed stepwise for each predetermined time, thereby changing a series of changes from the first frequency to the second frequency. An output clock signal is generated. The signal amplifying step amplifies the amplitude of the generated series of output clock signals to at least twice the amplitude of the series of output clock signals. In the sound output step, the amplified series of output clock signals are converted into sound, and the sound is heard by the pests. In the repeated generation step, the series of output clock signals are repeatedly generated.

  According to the present invention, it is possible to intentionally emit an unpleasant sound and keep a harmful animal away.

  It is an external appearance block diagram of the pest avoidance apparatus which concerns on this invention.   It is a functional block diagram of the pest avoiding apparatus according to the present invention.   It is a flowchart which shows the execution procedure of the pest avoidance apparatus which concerns on this invention.   FIG. 4 is a block diagram of a CPU clock signal according to the present invention (FIG. 4A) and a schematic diagram (FIG. 4B) showing a method for generating an output clock signal according to the present invention.   FIG. 5A is a graph showing a time series of a series of output clock signals according to the present invention (FIG. 5A), and FIG. 5B is a graph showing a time series of frequencies of a series of output clock signals according to the present invention.   A graph (FIG. 6A) showing the relationship between the frequency and sound pressure level of sound generated based on a series of output clock signals at time t1, and the frequency and sound of sound generated based on a series of output clock signals at time t2. A graph (FIG. 6B) showing the relationship with the pressure level, a graph (FIG. 6C) showing the relationship between the frequency of the sound generated based on a series of output clock signals at time t3 and the sound pressure level, and a series at time t4. FIG. 6D is a graph showing the relationship between the frequency of sound generated based on the output clock signal and the sound pressure level.   It is a graph which shows the relationship between the frequency of the audio | voice produced | generated based on a series of output clock signals, and a sound pressure level.   It is a graph which shows the time series of the frequency of a series of output clock signals when generation of a series of output clock signals is repeated.   A graph (measurement result) (FIG. 9A) showing the relationship between the frequency and sound pressure level of sound generated based on a series of output clock signals at time t1, and sound generated based on a series of output clock signals at time t2. A graph (measurement result) (FIG. 9B) showing the relationship between the frequency and the sound pressure level, and a graph (measurement) showing the relationship between the frequency of the sound generated based on a series of output clock signals at time t3 and the sound pressure level. (Result) (FIG. 9C) and a graph (measurement result) (FIG. 9D) showing the relationship between the frequency of the sound generated based on a series of output clock signals at time t4 and the sound pressure level.   It is a graph (measurement result) which shows the relationship between the frequency of the audio | voice produced | generated based on a series of output clock signals, and a sound pressure level.   It is the photograph at the time of repelling a trap with the pest avoiding apparatus of an Example.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. In addition, the following embodiment is an example which actualized this invention, Comprising: The thing of the character which limits the technical scope of this invention is not.

  First, the external appearance block diagram of the pest avoiding apparatus 1 which concerns on this invention is demonstrated. As shown in FIG. 1, the pest avoidance apparatus 1 according to the present invention includes a pest detection unit 10 and a speaker 11 (audio output unit). The pest detection unit 10 detects the approach of a pest. The pest detection unit 10 includes, for example, an infrared detection sensor (pyroelectric sensor), and a pest (an object that emits infrared rays) existing within a predetermined detection distance (for example, 12 m) from the pest detection unit 10. Can be detected. When the pest detection unit 10 detects the approach of the pest, the speaker 11 is changed from the first frequency (for example, 8 kHz) to the second frequency (for example, 40 kHz) by the microcontroller inside the main body 12. Output clock signals are generated, a series of output clock signals are amplified, and converted sound (ultrasonic waves) is emitted based on the amplified output clock signals. Pests feel uncomfortable or dangerous by hearing the sound and escape. The generation of a series of output clock signals will be described later.

  The pest detection unit 10 and the speaker 11 are provided, for example, on the front surface and the left and right side surfaces of the main body 12 of the pest repellent device 1 so that the pest can approach the front or both side surfaces of the pest repellent device 1. For example, one of the harmful animal detection units 10 detects the sound and the speaker 11 emits an ultrasonic wave. Therefore, the pest avoiding apparatus 1 can detect a pest in a wide range (3 directions) of 270 degrees as viewed from above, and can emit ultrasonic waves in the wide range.

  Moreover, the pest avoiding apparatus 1 according to the present invention includes a support portion 13 (support) that supports the main body 12 at a predetermined height. Moreover, the pest avoiding apparatus 1 according to the present invention includes an LED 14, and when the pest detection unit 10 detects the approach of the pest, the LED 14 turns on the light source of the LED 14 by the microcontroller inside the main body 12. LED14 irradiates a pest with high-intensity blue light from a light source, for example. Pests feel danger and escape by looking at the light. A plurality of (for example, six) LEDs 14 are provided on the front surface of the main body 12.

  Moreover, the pest avoiding apparatus 1 according to the present invention includes a solar panel 15, and the solar panel 15 generates power by sunlight and charges the generated electricity to the charging unit inside the main body 12. The electricity charged in the charging unit is supplied to each unit (detection unit 10, speaker 11, LED 14, microcontroller, etc.) of the beast harm aversion apparatus 1. Therefore, the pest avoiding apparatus 1 according to the present invention does not require an external power source. The electricity supplied by the charging unit is a direct current, and each unit is driven by this direct current.

  Moreover, the pest repellent device 1 according to the present invention includes an angle adjusting unit 16 that adjusts the angle of the solar panel 15. When the user installs the pest repelling device 1, the angle adjusting unit 16 is used, The power generation efficiency of the solar panel 15 is increased by aligning the power generation surface of the solar panel 15 with the direction of the sun around noon.

  Next, a functional block diagram of the pest avoiding apparatus 1 according to the present invention will be described. As shown in FIG. 2, the pest avoiding apparatus 1 according to the present invention includes a micro controller 20 inside the main body 12 in addition to the pest detecting unit 10, the speaker 11 (audio output unit), the LED 14, and the solar panel 15. And a signal amplifying unit 21, a charging unit 22, and a writing unit 23.

  The microcontroller 20 includes an oscillation circuit 20a and a signal generation unit 20b. The oscillation circuit 20a oscillates a CPU clock signal having a specific frequency (for example, 16 MHz) required for driving the CPU. When the pest detection unit 10 detects the approach of the pest, the signal generation unit 20b uses the CPU clock signal of the oscillation circuit 20a to change from the first frequency (for example, 8 kHz) to the second frequency (for example, 40 kHz). A series of output clock signals having changed up to are generated. That is, in the present invention, a plurality of oscillators for oscillating clock signals having two or more different frequencies are not required, and a desired series of output clock signals are programmed based on the CPU clock signal of one oscillation circuit 20a. Therefore, if a desired program is written in the microcontroller 20, it can be mass-produced, and a series of output clock signals with different frequencies can be adjusted and generated according to the kind of pests. Since it is possible, it has the advantage that it can respond flexibly. The program corresponds to the steps described later.

  Since the frequency range that can be heard differs depending on the type of pest, a wide range of frequencies can be obtained by setting the first frequency to 8 kHz and the second frequency to 40 kHz in order to apply to all types of pests. It is possible to generate a sound of the area, and it is possible to emit an effective sound regardless of what kind of harmful animal approaches.

  The series of output clock signals are input to the signal amplification unit 21. The signal amplification unit 21 sets the amplitude (for example, 5V) of the generated series of output clock signals to twice the amplitude of the series of output clock signals. Amplify to above (for example, 12V). A series of amplified output clock signals is input to the speaker 11. The speaker 11 emits sound to the detected pest. The microcontroller 20 includes a repeat generation unit 20c, and causes the signal generation unit 20b to repeat generation of a series of output clock signals a predetermined number of times.

  The microcontroller 20 includes a lighting control unit 20d. When the pest detection unit 10 detects the approach of the pest, the lighting control unit 20d inputs a lighting signal to the LED 14, and the LED 14 lights the light source. Irradiate pests with light.

  The charging unit 22 charges the electricity generated by the solar panel 15 and supplies the charged electricity to each unit. The writing unit 23 can be electrically connected to an external computer, and based on an instruction from the computer, the signal generating unit 20b generates a program for generating a series of output clock signals and a repetitive generating unit. A program for the number of generations of a series of output clock signals is written to 20c, or a bug is corrected.

  Next, the configuration and execution procedure of the pest avoiding apparatus 1 according to the present invention will be described with reference to FIGS. First, the user installs the pest avoiding apparatus 1 according to the present invention at a place where the pest appears and turns on the power (ON in FIG. 3: S101 YES).

  Then, the charging unit 22 that has been charged in advance by the solar panel 15 supplies electricity to each unit, and the microcontroller 20 performs an initial operation (FIG. 3: S102). Here, since the signal from the pest detection unit 10 (pyroelectric sensor) becomes unstable between the time when the power is turned on and a predetermined time (for example, 30 seconds), the microcontroller 20 The signal from the pest detection unit 10 is ignored from when the power is turned on until a predetermined time.

  When the initial operation is completed, the pest detection unit 10 starts detecting the approach of the pest (FIG. 3: S103). As long as the pest does not approach the pest repellent device 1 (unless the pest enters the detection distance from the pest detection unit 10), the pest detection unit 10 does not detect the approach of the pest (FIG. 3: S103 NO), repeatedly monitoring the approach of pests.

  On the other hand, when a pest approaches the pest repellent device 1, the pest detection unit 10 detects the approach of the pest (FIG. 3: S103 YES), and the signal generation unit 20b uses the CPU clock signal of the oscillation circuit 20a. The output clock signal is output, the H time corresponding to the HI state of the output clock signal is made constant, and the L time corresponding to the LOW state of the output clock signal is changed stepwise for each predetermined time, A series of output clock signals changing from the first frequency (8 kHz) to the second frequency (40 kHz) are generated (FIG. 3: S104).

  Specifically, the following procedure is performed. First, as shown in FIG. 4A, the oscillation circuit 20a of the microcontroller 20 oscillates a CPU clock signal having a relatively high frequency (16 MHz). When this CPU clock signal is decomposed, a plurality of sine waves are superimposed. It consists of a combination. Therefore, as shown in FIG. 4A, the shape of the CPU clock signal is not a strict rectangular wave (square wave) but a rectangular wave including predetermined noise. By generating an output clock signal as a sound source using this rectangular wave, it is possible to emit sound including noise (unpleasant sound) that causes resonance in the sound to be described later and has a sharp change in frequency. .

  First, when the approach of a pest is detected, the signal generation unit 20b counts the number of rising CPU clock signals as a count number C, and the count number C is preset from 0 as shown in FIG. 4B. Until the first threshold value C0, a predetermined voltage value (5 V) is output as an output value. Next, the signal generation unit 20b sets the voltage value to 0V and outputs it when the count number C is between the first threshold value C0 + 1 and the preset second threshold value C1. The second threshold C1 corresponds to the first frequency (8 kHz). As a result, the output clock signal is in the HI state when the count number C is between 0 and the first threshold value C0, and is in the LOW state when the count number C is between the first threshold value C0 + 1 and the second threshold value C2. Can be generated. Here, the time that the output clock signal is in the HI state is referred to as H time, and the time that the output clock signal is in the LOW state is referred to as L time (L1 in FIG. 4B).

  Next, when the count number C exceeds C1, the signal generation unit 20b resets the count number C to 0 and outputs the voltage value again when the count number C is between 0 and the first threshold value C0. When the count number C is between the first threshold value C0 + 1 and the second threshold value C1, an output clock signal having a predetermined cycle T1 (= H + L1) is generated by outputting 0V.

  When the first frequency (1 / T1) is 8 kHz in the output clock signal, for example, the first threshold C0 is set to 200, and the second threshold C1 is set to 2000.

  Here, the first threshold C0 is related to the H time of the output clock signal, that is, the pulse width. When the first threshold C0 is 200, the pulse width of the output clock signal is 15.6 μsec. The L time is 109.4 μsec, and the first period T1 is 125 μsec.

  The signal generation unit 20b sets the second threshold C2 to the second frequency (40 kHz) every time a predetermined time Tm (for example, 100 msec) has elapsed from the time when the count C is started. A predetermined value ΔC (for example, 16) is changed so as to approach the corresponding third threshold value Cn (for example, 400), and the changed change value C2 is set as a new second threshold value. Here, since the first frequency is 8 kHz and the second frequency is 40 kHz, the signal generation unit 20b subtracts the second threshold C2 by a predetermined value ΔC and subtracts the subtracted value C2 (= C1− ΔC) is set as a new second threshold. When the first frequency is 40 kHz and the second frequency is 8 kHz, the second threshold C2 is 400 and the third threshold Cn is 2000. The unit 20b adds the second threshold value C2 by a predetermined value ΔC, and sets the added value C2 (= C1 + ΔC) as a new second threshold value. Here, the description will be made on the assumption that the second threshold C2 is 2000 and the third threshold Cn is 400.

  Then, as shown in FIG. 4B, when the signal generation unit 20b sets a new second threshold value C2, the voltage value is output and counted when the count number C is between 0 and the first threshold value C0. When the number C is between the first threshold C0 + 1 and the new second threshold C2, 0V is output. As a result, the L time corresponding to the LOW state can be decreased step by step for each predetermined time Tm, so that the cycle T of the output clock signal is reduced every predetermined time Tm, in other words, the output clock signal. The frequency f can be increased.

  Further, by fixing the H time of the output clock signal and making the L time variable, it is possible to smoothly generate sound based on a series of output clock signals whose frequency changes. In other words, it is possible to shorten the H time of the output clock signal as much as possible. However, since the output clock signal is generated on the program of the microcontroller 20, the processing amount of the program increases. It may not work properly. On the other hand, if the H time of the output clock signal is lengthened, the step size of the output clock signal becomes rough, and a problem is likely to occur in audio output. Therefore, the H time of the output clock signal is fixed according to the specifications of the microcontroller 20, the signal amplifying unit 21, and the speaker 11, and the L time of the output clock signal is changed to change the frequency greatly. Even if a series of output clock signals are generated, there is no problem in the conversion of the sound, and the sound whose frequency changes can be generated smoothly.

  Next, the signal generation unit 20b obtains a predetermined value ΔC from the new second threshold C2 every predetermined time Tm until the new second threshold C2 reaches a preset third threshold Cn. Repeat the subtraction process. By doing so, an output clock signal in which the period is subtracted in steps is generated.

  Then, when the new second threshold C2 is repeatedly subtracted by the predetermined value ΔC, and the subtracted new second threshold C2 becomes the third threshold Cn, the signal generation unit 20b passes the predetermined time Tm. Until the count number C is between 0 and the first threshold value C0, the voltage value is output, and when the count number C is between the first threshold value C0 + 1 and the third threshold value Cn, 0V is output.

  As described above, the signal generation unit 20b subtracts the second threshold C2 from the predetermined time Tm (100 msec) n = {(first second threshold C2−third threshold Cn) / predetermined value ΔC. } = {(2000−400) / 16} = 100 The generation of the output clock signal is continued for the generation time Tg (100 msec × 100 times = 10 sec).

  When the second frequency (1 / Tn) of the output clock signal is 40 kHz, for example, C0 is set to 200 and Cn is set to 400.

  In this way, the signal generation unit 20b can generate a series of output clock signals that change from the first frequency (f1) to the second frequency (fn) by using the CPU clock signal and the count number C. I can do it. In other words, a series of output clock signals whose frequency changes can be generated programmatically by using one oscillation circuit 20a.

  The period and frequency characteristics of a series of output clock signals are as follows. That is, for a period of a series of output clock signals, as shown in FIG. 5A, first, an output clock signal having a long first period T1 is generated for a predetermined time Tm, and then the first period T1 An output clock signal having a short period T2 is generated for a predetermined time Tm. As described above, the cycle T of the output clock signal is shortened stepwise, and finally, the output clock signal having the shortest cycle Tn is generated.

  On the other hand, as shown in FIG. 5B, for a series of output clock signal frequencies, an output clock signal having a short first frequency f1 (= 1 / T1) (8 kHz) is first generated for a predetermined time Tm. In addition, an output clock signal having a frequency f2 longer than the first frequency f1 is generated for a predetermined time Tm. Here, since the frequency f of the output clock signal is the reciprocal of the period T, it increases stepwise in an exponential manner, and finally, the output clock signal having the second frequency fn (40 kHz) is generated. Thus, by changing the period T stepwise, a series of output clock signals whose frequencies change exponentially can be generated.

  Now, when the signal generation unit 20b generates a series of output clock signals, it is sent to the signal amplification unit 21, and the signal amplification unit 21 determines the amplitude (5V) of the generated series of output clock signals as the series of output clocks. The signal is amplified to at least twice (12V) the amplitude of the clock signal (FIG. 3: s105).

  Specifically, a DC motor driving full bridge driver IC capable of amplifying from a low frequency to a high frequency is adopted as the signal amplifying unit 21, and the amplitude of the generated series of output clock signals is changed from 5V to 12V. Amplify. Thereby, generally, if the load of the output signal is increased (when the energy is increased), the output clock signal can be stabilized. Therefore, the sound (ultrasonic wave) emitted from the speaker 11 based on this output clock signal The sound pressure level can be increased with certainty.

  Then, when the signal amplifier 21 amplifies the amplitude of the series of output clock signals, the signal is sent to the speaker 11, and the speaker 11 converts the amplified series of output clock signals into sound (FIG. 3: S106), Let the pest hear the sound.

  Here, FIG. 6 shows a time-series change in the frequency and sound pressure level of the sound generated based on a series of output clock signals. Note that the magnitude relationship among the times t1, t2, t3, and t4 in FIG. 6 is 0 (sec) <t1 <t2 <t3 <t4 <generation time Tg (sec).

  As shown in FIG. 6A, in the initial stage (t = t1), although the voice having the first frequency of 8 kHz is output as the main peak, a plurality of noise peaks are seen on the higher frequency side than 8 kHz. Also, as shown in FIG. 6B, in the second stage (t = t2), the frequency of the target main peak out of the uttered voice is shifted to the high frequency side, and the voice of frequency 10 kHz becomes the main peak. However, there are two noise peaks on the high frequency side and one noise peak on the low frequency side. Further, as shown in FIG. 6C, in the third stage (t = t3), the frequency of the target main peak is further shifted to the higher frequency side, and the sound of frequency 15 kHz is output as the main peak. Two noise peaks can be seen on the high frequency side and one noise peak on the low frequency side. As shown in FIG. 6D, at the final stage (t = t4), since the generation time Tg is close, a sound with a frequency of 35 kHz is output as a main peak, but a plurality of noise peaks are seen on the low frequency side. In this way, a noise peak is generated in addition to the main peak of the target frequency, and this noise peak is correctly generated due to resonance in the voice, and the generated voice (ultrasound) generates noise with a high frequency change. This indicates that the sound is an unpleasant sound.

  Next, FIG. 7 shows the relationship between the frequency of sound generated based on a series of output clock signals and the sound pressure level. As shown in FIG. 7, at a specific distance from the pest repellent device 1, the sound pressure level is slightly lower on the low frequency side, but the sound pressure level is flat on the high frequency side. The pressure level can be reliably increased. It can be understood that the tendency is the same even when the specific distance is 2 m, 4 m, and 8 m. This indicates that the signal amplification unit 21 for increasing the sound pressure level is functioning well.

  Now, when the speaker 11 hears sound from the pest based on a series of output clock signals, the repeat generation unit 20c repeatedly generates the series of output clock signals (FIG. 3: S107).

  Specifically, when the signal generator 20b generates an output clock signal having the second (final) frequency fn, the new second threshold C2 becomes the third threshold Cn, and the signal generator 20b When the count number C is between 0 and the first threshold value C0, the voltage value is output. When the count number C is between the first threshold value C0 + 1 and the third threshold value Cn, 0V is output, The time Tm elapses. Then, the repetition generation unit 20c adds 1 to 0 of the predetermined repetition number R, and determines whether or not the repetition number R has reached a preset repetition threshold (for example, 3 times).

  At this time, since the repetition number R is 1, the repetition generation unit 20c determines that the repetition number R is not the repetition threshold (FIG. 3: S107 YES), sets the count number C to 0, The threshold value Cn is returned to the first second threshold value C1.

  Thereby, the process returns from S107 to S104. That is, the signal generator 20b outputs the voltage value when the count number C is between 0 and the first threshold value C0, and the count value C is between the first threshold value C0 + 1 and the second threshold value C1. The voltage value is output at 0V, and the second threshold value C1 is repeatedly subtracted by the predetermined value ΔC every predetermined time Tm until the second threshold value C1 becomes the third threshold value Cn. Continue to generate a series of output clock signals. The same applies to the case where the second threshold C1 is 400, the third threshold Cn is 2000, and a predetermined value ΔC is added.

  Then, as shown in FIG. 8, the generation of a series of output clock signals is repeated with the generation period Tg as a unit. The generation of a series of output clock signals is repeated a predetermined number of times (three times). In S107, the repetition number R becomes three, and the repetition generation unit 20c determines whether or not the repetition number R has reached a repetition threshold (three times). Is determined (FIG. 3: S107).

  In this case, since the number of repetitions R is 3, the repetition generation unit 20c determines that the number of repetitions R has reached the repetition threshold (FIG. 3: S107 NO), and outputs a series of output clock signals to the signal generation unit 20b. The generation is terminated (FIG. 3: S108). As a result, the generation of sound stops.

  Now, an unpleasant sound is generated based on a series of output clock signals, but a pest who hears this sound feels uncomfortable or crisis and immediately escapes. Even if it is a pest that only hears an unpleasant sound once, if the unpleasant sound repeatedly occurs as described above, the pest will have a sense of crisis, will immediately leave the place, and will never approach again .

  In the above description, the generation of sound has been mainly described. However, in the harmful animal repellent device 1 according to the present invention, the irradiation of light is performed simultaneously with the generation of the sound, thereby enhancing the harmful animal repellent effect. That is, when the pest detection unit 10 detects the approach of the pest (FIG. 3: S103 YES), the lighting control unit 20d turns on the light source of the LED 14 (FIG. 3: S109). Thereby, an unpleasant sound (ultrasonic wave) and the light of LED14 can be emitted simultaneously to a pest, and a sense of crisis can be given to a pest more strongly.

  In S107, when the repetition generation unit 20c determines that the repetition number R has reached the repetition threshold (FIG. 3: S107 NO), the lighting control unit 20d completes the repetition of the generation of the series of output clock signals. The light source of the lit LED 14 is turned off (FIG. 3: S110). Thereby, the light of LED14 can be stopped simultaneously with an unpleasant sound (ultrasonic wave).

  The repetitive generation unit 20c stops the generation of a series of output clock signals, and the lighting control unit 20d turns off the light beam of the LED 14, and the process ends. When approaching the repelling device 1, the process starts from S103. These processes are repeated until the amount of electricity in the charging unit 22 disappears or the power is turned off (OFF) by the user.

<Examples, experimental results, etc.>
EXAMPLES Hereinafter, although an Example etc. demonstrate this invention concretely, this invention is not limited by this.

  First, a prototype of the pest avoidance apparatus 1 was created based on the drawings shown in FIGS. The prototype was then subjected to sound pressure measurement at the Kobayashi Institute of Science. FIG. 9 shows time-series changes (measurement results) in the frequency and sound pressure level of sound generated based on a series of output clock signals. Note that the magnitude relationship between times t1, t2, t3, and t4 in FIG. 9 is 0 <t1 <t2 <t3 <t4 <10 sec. As shown in FIG. 9A, at the initial stage (t = t1), a main peak corresponding to the target frequency appears on the low frequency side, and a plurality of noise peaks corresponding to noise appear on the high frequency side. As shown in FIG. 9B, in the second stage (t = t2), the main peak shifts to the high frequency side, and a plurality of noise peaks appear on the high frequency side and the low frequency side. As shown in FIG. 9C, in the third stage (t = t3), the main peak is further shifted to the high frequency side, and a plurality of noise peaks appear on the high frequency side and the low frequency side, as shown in FIG. 9D. In the final stage (t = t4), the main peak approaches the target high frequency, and a plurality of noise peaks appear on the low frequency side. In this way, it was possible to generate unpleasant sound by generating a sound including noise while changing from a low frequency to a high frequency.

  FIG. 10 shows the relationship (measurement result) between the frequency of sound generated based on a series of output clock signals and the sound pressure level. Here, the values in FIG. 10 perform air absorption correction. As shown in FIG. 10, when the specific distance from the pest repellent device 1 is 2 m, 4 m, and 8 m, the sound pressure level is slightly lower on the low frequency side, but the sound pressure level is flat on the high frequency side. It was possible to increase the sound pressure level at any frequency.

  Next, a prototype of the pest repellent device 1 was installed in a place where a plurality of moths appeared and were damaged as pests, and the pest repellent effect was confirmed. As a result, when a plurality of wrinkles appear, the pest avoiding apparatus 1 is activated, and generates a sound wave (unpleasant sound) (ultrasonic wave) and light with noisy noise with a high frequency change. As you can see, you repel all the multiple spears. After a few days, the moths no longer appear, and there is almost no damage to the pests. There was a similar repellent effect on deer, raccoon, and frogs.

  As described above, the present invention is useful as a pest repelling apparatus and a pest repelling method that can effectively repel pests such as spiders, monkeys, bears, deers, and spiders. It is effective as a pest repelling device and a pest repelling method that can be intentionally emitted and keep the pests away.

1 Pest repellent device 10 Pest detection unit 11 Speaker (audio output unit)
12 body 13 support part 14 LED
15 Solar Panel 16 Angle Adjustment Unit 20 Microcontroller 20a Oscillation Circuit 20b Signal Generation Unit 20c Repetition Generation Unit 20d Lighting Control Unit 21 Signal Amplification Unit 22 Charging Unit 23 Writing Unit

Claims (4)

A pest detection unit that detects the approach of a pest,
When an approach of the pest is detected, an output clock signal is output using a rectangular CPU clock signal composed of a plurality of superimposed sine waves, and an H corresponding to the HI state of the output clock signal is output. A series of output clock signals that change from the first frequency to the second frequency are generated by changing the L time corresponding to the LOW state of the output clock signal in stages at a predetermined time with a constant time. A signal generator to
A signal amplifying unit for amplifying the amplitude of the generated series of output clock signals to at least twice the amplitude of the series of output clock signals;
An audio output unit that converts the amplified series of output clock signals into audio and hears the audio to the pest;
A repetitive generation unit that repeatedly generates the series of output clock signals;
Pest repellent device with. When the approach of the pest is detected, the LED light source is turned on to irradiate the pest, and when the generation of the series of output clock signals is completed, the light source of the lit LED is turned off. The pest repellent device according to claim 1, further comprising a lighting control unit. The signal generator is
When the approach of the pest is detected, the number of rising edges of the CPU clock signal is counted as a count number C, and a predetermined voltage value is output when the count number C is between 0 and the first threshold value C0. When the count number C is between the first threshold value C0 + 1 and the second threshold value C1 corresponding to the first frequency, the voltage value is set to 0V, and the count number C is output. Exceeds the second threshold C1, the count C is returned to 0,
Each time a predetermined time Tm elapses from when the counting of the count number C is started, the second threshold C2 is set to a predetermined value ΔC so as to approach the third threshold Cn corresponding to the second frequency. The changed change value C2 is set as a new second threshold value. When the count number C is between 0 and the first threshold value C0, the voltage value is output, and the count number C is Between the first threshold value C0 + 1 and the new second threshold value C2, 0V is output,
The process of changing the new second threshold C2 by the predetermined value ΔC is repeated at each predetermined time Tm until the new second threshold C2 becomes the third threshold Cn. The pest avoiding apparatus according to 2. A pest detection step for detecting the approach of the pest;
When an approach of the pest is detected, an output clock signal is output using a rectangular CPU clock signal composed of a plurality of superimposed sine waves, and an H corresponding to the HI state of the output clock signal is output. A series of output clock signals that change from the first frequency to the second frequency are generated by changing the L time corresponding to the LOW state of the output clock signal in stages at a predetermined time with a constant time. Generating a signal step;
A signal amplifying step for amplifying the amplitude of the generated series of output clock signals to at least twice the amplitude of the series of output clock signals;
An audio output step of converting the amplified series of output clock signals into audio and listening the audio to the pest;
A repetitive generation step of repeatedly generating the series of output clock signals;
A pest repellent method for a pest repellent device comprising: