JP4421872B2 - Mouse detection method - Google Patents

Description

  The present invention relates to a mouse detection method, and more particularly to a method that can accurately detect a mouse that has entered a predetermined area.

  For example, at home, mice have invaded kitchens and devoured groceries, or bites walls and pillars of rooms and warehouses. It is to become. In addition, when rice or cereals are stored in a warehouse, there is a concern about mouse damage unless some measures are taken.

  Various methods have been proposed in the past to detect mice using various sensors such as optical sensors, infrared sensors, and piezoelectric sensors, and to eliminate mice by applying stimuli to avoid mice such as sound, vibration, ultrasonic waves, electric shocks, and drugs. ing.

  However, with conventional sensors, the mouse cannot detect the mouse unless it crosses the light or infrared light emitted by the sensor or passes over the sensor, and if the mouse learns the position that the sensor can detect, the effect of removing the mouse Was hardly obtained.

On the other hand, a mouse detection method has been proposed in which the presence or absence of a mouse and its type are detected by detecting an ultrasonic wave in which the mouse is generated (Patent Document 1).
JP 54-133154 A

  However, in the detection method described in Patent Document 1, the ultrasonic waves to be detected are ultrasonic waves generated during the courtship between male and female mice, ultrasonic waves generated during struggle between male solids, ultrasonic waves generated during food intake, and the like. It is an ultrasonic wave in the range of 50 KHz. In many cases, it is rare that a mouse is simply running around. There was a case where it was not possible to detect a mouse that had entered inside.

  In view of such a problem, an object of the present invention is to provide a mouse detection method capable of accurately and reliably detecting a mouse that has entered a predetermined area.

  The inventor of the present invention diligently studied to solve the above-described problems, and as a result, came to know the following. In other words, there is a dwelling mouse and a mouse rat in the habitable mouse, but in any mouse, the volume of sound varies depending on the distance between the mouse and the mouse when it rubs or bites a pillar or wall. It was confirmed that sound having a frequency within a range of 1 KHz to 9 KHz centered on about 5 KHz was generated, and that the presence of a mouse could be detected from the sound of this frequency component.

  Therefore, in the mouse detection method according to the present invention, when detecting the presence or absence of a mouse in a predetermined area, the sound generated in the above area is sampled, and the collected sound has a frequency component in the range of 1 KHz to 9 KHz. And the presence of a mouse in the region is detected when the frequency component is equal to or higher than a predetermined sound pressure.

  One of the features of the present invention is that the frequency component in the range of 1 KHz to 9 KHz, preferably in the range of 4.5 KHz to 6.5 KHz, centered on approximately 5 KHz that is generated when the rat wrinkles or bites the pillar or wall. The sound and its sound pressure level are detected, and the presence or absence of the mouse in the area is determined.

  Thereby, the position where the mouse can be detected is not limited as in the case of using an optical sensor, an infrared sensor, a piezoelectric sensor, or the like, and the presence or absence of the mouse in a wide area can be detected.

  Rather than detecting ultrasound generated during courtship between males and females, struggles between males, and during food intake, the mouse stabs or bites a column or wall, that is, normal activity of the mouse. Since sounds generated at times are detected, the presence or absence of mice in the area can be detected accurately and reliably.

  In addition, for example, sounds generated by refrigerators and other electrical products, human footsteps, and automobile sounds are different in frequency, and thus are not erroneously detected.

  An apparatus for carrying out the method of the present invention is also novel. That is, the mouse detection apparatus according to the present invention is a mouse detection apparatus for detecting the presence or absence of a mouse in a predetermined area, and a casing installed in the area, and attached to the casing, A microphone for collecting sound, filter means for extracting a signal having a frequency component of 1 KHz to 9 KHz from a sound signal collected by the microphone, and a sound pressure level for detecting the magnitude of the sound signal having a frequency component extracted by the filter circuit It is characterized by comprising detection means and determination means for determining that the mouse is present in the region when the magnitude of the sound signal of the frequency component extracted by the filter circuit is greater than or equal to a set magnitude.

  The material of the casing is not particularly limited as long as it can be installed, and a metal material or a synthetic resin material can be used. The microphone may have any shape as long as it can be attached to the casing.

  The filter means, the sound pressure level detection means, and the determination means may be configured by hardware circuits, and the functions thereof may be realized by arithmetic processing using a microcomputer.

  The sound generated when a mouse runs or bites a pillar or wall can be collected as sound that propagates in the air, but the sound when the mouse runs around can also be collected as vibration sound. Therefore, it is preferable to provide a microphone on one or both of the side surface and the bottom surface of the casing so as to collect sound from the side, bottom, or both.

  Further, how to set the sound pressure level of the frequency component extracted by the filter means is set depending on the size of the mouse in which the presence or absence of the mouse is detected. For example, from a position 1 m away from the microphone Accurate detection is possible by setting the reference sound pressure to determine whether or not the mouse is present when sampling the propagating sound to be emitted, and setting the reference sound pressure to 10 dB or more when collecting the vibration sound. Is possible. Therefore, when collecting a sound at a position farther than 1 m, it is preferable to set the sound pressure lower than the above-described sound pressure.

  In other words, the determination means is 50 dB or more when the magnitude of the sound signal of the frequency component extracted by the filter circuit is 50 dB or more when the sound is collected by the microphone on the casing side surface, and 10 dB or more when the sound is collected by the microphone on the casing bottom surface. Sometimes it is configured to determine that a mouse is present in the region.

  Further, as described above, since the sound pressure is approximately proportional to the distance to the mouse, the approximate distance from the microphone to the mouse can be obtained based on the magnitude of the sound pressure.

  Furthermore, since the presence or absence of the mouse can be accurately detected as described above, a stimulus for avoiding the mouse, for example, vibration, light, sound, ultrasonic wave, electric shock, etc. is generated by the signal of the determination means, and the mouse is surprised and removed. It can also be done.

  That is, it is preferable to further provide a repelling means for receiving a signal from the determining means and generating a stimulus that the mouse repels when the presence of the mouse in the region is determined. For example, if phosphorescent paint or fluorescent paint is applied to a small vibrator, the vibrator and the mouse detector are connected with a signal cord, and the vibrator is vibrated, the vibrator emits light. It moved around like a snake on the floor, and it was confirmed that the mouse escaped very surprised.

  Hereinafter, the present invention will be described in detail based on specific examples. 1 and 2 show a preferred embodiment of a mouse detection apparatus according to the present invention. In the figure, the casing 10 is manufactured in a rectangular box shape using a metal panel, and legs 11 are attached to the four corners of the bottom surface thereof so that the bottom surface is floated.

  Two microphones 12 and 13 are built in the casing 10, one microphone 12 is attached to the side surface of the casing 10, and the other microphone 12 is attached to the bottom surface of the casing 10 to collect sound from the side and bottom. It is like that.

  Further, in the casing 10, filter circuits (filter means) 21 and 22, sound pressure level detection circuits (sound pressure level detection means) 23 and 24, determination circuit (determination means) 25, timer circuit 30, delay circuit 31, flasher (Repelling means) 15 and a high-volume buzzer (repelling means) 16 are incorporated, and the filter circuits 21 and 22 receive sound signals of the microphones 12 and 13, and 1 KHz to 9 KHz centering on 5 KHz, preferably 4.5 KHz to 6 A sound signal having a frequency component within a range of .5 KHz is extracted.

  Further, the sound pressure level detection circuits 23 and 24 receive the sound signal of the frequency component extracted by the filter circuits 21 and 22, and when the sound signal is picked up by the microphone 12 on the side surface of the casing 10, it is 50 dB or more. In this case, when sound is collected by the microphone 13 on the bottom surface of the casing 10, it is determined that the mouse exists in the region to be detected when the sound is 10 dB or more.

  The detection signal of the determination circuit 25 is given to the timer circuit 30 to operate the flasher 15, the high volume buzzer 16, and / or the small vibrator 20 for a predetermined time, for example, 5 to 45 seconds. In order to prevent the high volume buzzer 16 from getting used to the buzzer sound, for example, it is preferable to set a timbre pattern of three sounds and change the timbre for each of the first, second and third operations. Further, the vibrator 20 is coated with a phosphorescent paint on the surface, and receives light from the flasher 15 to emit light for a certain period of time.

  The delay circuit 31 outputs the signal output of the determination circuit 25 for a predetermined time, for example, 4 to 5 so that the microphones 12 and 13 do not detect the buzzer sound generated by the high-volume buzzer 16 or the vibration sound of the vibrator 20 by the microphones 12 and 13. It is designed to delay about a second.

  The power pack 32 converts commercial AC power into DC, and the output is given to the delay circuit 33. The delay circuit 33 applies the DC voltage after about 20 to 30 seconds after the power switch 19 is turned on. The voltage is applied to each circuit 21 to 25, 30, 31.

  A power switch 19, an ON / OFF switch 17 for the flasher 15, and an ON / OFF switch 16 for the high volume buzzer 16 are attached to the front surface of the casing 10, and a power source connected to a commercial power outlet (not shown). The power cord of the plug 14 is connected.

  Further, a window is formed on the side surface of the casing 10 opposite to the microphone 12 and a flasher (repelling means) 15 is attached so as to emit high-intensity flashing light outward.

  Further, a high-volume buzzer (repelling means) 16 is attached to the back surface of the casing 10 so as to emit a buzzer with a volume that avoids rats.

  Further, the casing 10 is provided with a connection jack 35 to which a signal cable plug of the vibrator (repelling means) 20 is inserted and connected. Since the connection jack 35 can be turned ON / OFF by plugging / unplugging, it is shown in the form of a switch for convenience in FIG.

  For example, when a mouse entering a 2m square area is exterminated, the apparatus of this example is installed in the center of the area. Then, the casing 10 of the apparatus is in a state where the bottom surface is floated from the floor surface of the region by the legs 11.

  Next, when the power switch 19 is turned on, a voltage is applied to each circuit in the casing 10 after a delay of a set time, for example, 15 to 30 seconds, by the delay circuit 33, thereby enabling a mouse to be detected. The reason why the voltage is not applied to each circuit immediately after the power switch 19 is turned on is that there is a person near the device, so the frequency of the sound generated by the mouse due to some reason for the sound or vibration generated when the person moves It is for avoiding this because there is a possibility of malfunction if the component is contained. Further, depending on whether the mouse is extinguished by light or repelled by a buzzer sound, both or one of the ON / OFF switches 17 and 18 is turned ON, and the plug is connected to the jack 35 depending on whether or not the vibrator 20 is operated. Plug in.

  Now, when a mouse enters a 2m square area, a sound of “Kasakkoso” is generated by the heel and a fine vibration sound is generated by the heel of the mouse. Then, sound and fine vibration sound are collected by the microphone 12 on the side surface of the casing 10, and fine vibration sound is collected by the microphone 13 on the bottom surface of the casing 10.

  The collected sound signal is input to the filter circuits 21 and 22, the sound signal having a frequency component in the range of 1 KHz to 9 KHz is extracted, and the extracted sound signal having the frequency component is input to the sound pressure level detection circuits 23 and 24. Is done.

  One sound pressure level detection circuit 23 is a sound signal from the microphone 12 on the side surface of the casing 10, and therefore it is determined that the mouse exists when the sound signal of the extracted frequency component is 50 dB or more.

  Since the other sound pressure level detection circuit 24 is a sound signal from the microphone 13 on the bottom surface of the casing 10, it is determined that the mouse exists when the sound signal of the extracted frequency component is 10 dB or more.

  That is, since the presence or absence of the mouse is detected from the sound of the mouse and the slight vibration sound at the time of the mouse in the area, if the mouse enters the area of 2 m square, the determination circuit 25 uses the signal of at least one of the signals. Presence is detected.

  Then, the operating voltage is applied to the flasher 15, the high volume buzzer 16 and / or the vibrator 20 only for the time set by the timer circuit 30, for example, within the range of 5 seconds to 45 seconds, and the flasher 15 is set. A high-brightness flashing light is emitted for a given time, the high-volume buzzer 16 generates a high-volume buzzer sound, and the vibrator 20 vibrates, receiving the flashing light of the flasher 15 and emitting light, like a snake. Moving around, the mouse is surprised and runs away from the area.

  The high-volume buzzer sound and the vibration sound of the vibrator 20 are collected by the microphones 12 and 13, but since the output of the determination circuit 25 is stopped by the action of the delay circuit 31, it is not erroneously detected.

  Further, when the mouse bites a pillar or wall in the area, the sound is collected by the microphone 12 on the side surface of the casing 10, and thereafter a high-intensity flashing light and / or a high-volume buzzer sound are emitted in the same manner as described above. The vibrator 20 moves around like a snake while emitting light.

1 is an external view showing a preferred embodiment of a mouse detection apparatus according to the present invention. It is a figure which shows the functional block in the said embodiment.

Explanation of symbols

10 Casing 12, 13 Microphone 15 Flasher (repelling means)
16 High volume buzzer
20 Exciter (repellent means)
21, 22 Filter circuit (filter means)
22, 23 Sound pressure level detection circuit (sound pressure level detection means)
25 determination circuit (determination means)

Claims (5)

In detecting the presence or absence of rats in a given area,
When sound generated in the region is sampled and the collected sound contains a frequency component in the range of 1 KHz to 9 KHz, and the frequency component is equal to or higher than a predetermined sound pressure, the mouse is in the region. A mouse detection method characterized by detecting the presence of the mouse. A mouse detection device for detecting the presence or absence of a mouse in a predetermined area,
A casing installed in the area;
A microphone attached to the casing and collecting sound around the casing;
Filter means for extracting a signal having a frequency component of 1 KHz to 9 KHz from a sound signal collected by the microphone;
A sound pressure level detecting means for detecting the magnitude of the sound signal of the frequency component extracted by the filter circuit;
Determining means for determining that the mouse is present in the region when the magnitude of the sound signal of the frequency component extracted by the filter circuit is equal to or larger than a set magnitude;
A mouse detection apparatus comprising: The mouse detection device according to claim 2, wherein the microphone is provided on one or both of the side surface and the bottom surface of the casing and collects sound from the side, the bottom, or both. The determining means is 50 dB or more when the magnitude of the sound signal of the frequency component extracted by the filter means is 50 dB or more when the sound is collected by the microphone on the side of the casing, and 10 dB or more when the sound is collected by the microphone on the bottom surface of the casing. 4. The mouse detection apparatus according to claim 3, wherein it is determined that the mouse is sometimes present in the region. The detection of a mouse according to any one of claims 2 to 4, further comprising a repelling means for receiving a signal from the determination means and generating a stimulus that the mouse repels when the presence of the mouse in the region is determined. apparatus.

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