JPS6022887B2 - Harmful small animal extermination device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small harmful animal extermination device for eliminating small animals that are harmful to humans and livestock, such as rats and birds, and to modified objects.

For example, it is widely known that rats dislike ultrasonic waves of 20 to OKHZ, and these ultrasonic waves are emitted continuously or intermittently toward passageways, entrances, etc. for rats to control rats. The method is followed by subordinates.

However, if ultrasonic waves of a constant oscillation frequency are continued to be used, there is a problem in that rats become accustomed to the method and the extermination effect is greatly reduced. Furthermore, although a speaker is generally used to output ultrasonic waves, the extermination range of a single speaker is extremely narrow. The purpose of the present invention is to eliminate the above-mentioned drawbacks, and to eliminate harmful small animals by using a plurality of speakers that operate in a predetermined relationship with each other, without causing any harm to rats, and by enlarging the range of extermination. The purpose of the device is to provide a single ultrasonic oscillator that converts the oscillation frequency of ultrasonic waves in a time-series manner, and an ultrasonic output signal of the ultrasonic oscillator that outputs the ultrasonic wave output signal acoustically and is spaced apart from each other. The present invention is characterized by comprising a plurality of speaker devices arranged in parallel, and a sliding door device that changes the sound output level of each of these speaker devices while shifting the phase relationship with each other.

The present invention will be explained in detail based on illustrated embodiments.

Fig. 1 is a circuit diagram of this device, and an ultrasonic oscillation circuit 1 containing a basic oscillation circuit and a modulation circuit oscillates a frequency-modulated ultrasonic output signal as shown in Fig. 2a. .

This output signal is input in parallel to, for example, four AND circuits 2a to 2d, and each AND circuit 2a to 2d is further individually inputted with a control output from a control circuit 3 consisting of a shift register or a counter. Ultrasonic output signals logically multiplied with the control outputs from 2a to 2d are sent to amplifiers 4a to 2d.
4d to the speakers 5a to 5d, respectively.
Sound output is emitted from the speakers 5a to 5d. The control circuit 3 is activated by clock pulses from the clock oscillation circuit 6, and transmits control outputs to the AND circuits 2a to 2d according to the settings of the initial setting circuit 7. The control output from the control circuit 3 to each AND circuit 2a to 2d is configured to alternately switch these AND circuits 2a to 2d. For example, as shown in FIG. The third speaker 5c is configured to operate non-reciprocally, and the second speaker 5b and fourth speaker 5d are similarly configured to operate reciprocally.

The first speaker 5a and the second speaker 5b are operated with a phase shift of 180 degrees. Actually, these ultrasonic oscillation circuit 1, AND circuits 2a to 2
d, the control circuit 3, amplifiers 4a to 4d, clock oscillation circuit 6, initial setting circuit 7, and power supply circuit (not shown) are all housed in the speaker box of the first speaker 5a, and the second
, the third and fourth speakers 5b, 5c, and 5d are wired by extending only the ultrasonic output signal line from the speaker box of the first speaker 5a, and acoustic output is emitted from each speaker 5a to 5d. It is like that. These speakers 5a to 5d emit a sound output of, for example, 1.2 mm, and
Repeat the stopping between 2 sands and increase the first and second speed force 5.
There is 0 between a and 5b. The oscillation frequency is set to 6 in the range of 8 to 40 KHZ as shown in Figure 2a.
Assuming a triangular wave with a period of seconds, the first speaker 5a changes the oscillation frequency from 8 to 20 KHZ at first, then from 35 to 40 KH2, then from 20 to 20 KH2, and then from 20 to 30 HZ, and intermittently. It will emit ultrasonic waves.

Also ~ At this time, the third speaker 5c emits sound output while the first speaker 5a is stopped, and initially
~3 arc HZ, then 35~20KHZ, then 8~20KH
2, ultrasonic waves are output intermittently while modulating the frequency in the same way. Therefore, these four speakers 5
If speakers a to 5d are placed at appropriate locations in a warehouse where rats are infested, for example, each speaker 5a to 5d will emit random, so to speak, sound output intermittently at different oscillation frequencies. The possibility of getting used to the ultrasonic output is extremely small. In the above embodiment, the ultrasonic oscillation output waveform was a triangular wave, but since ultrasonic waves have little effect on controlling rats in a relatively low frequency range, a clamp circuit was inserted between the 11 oscillating circuits as shown in FIG. It is also possible to output a waveform in which the lower part of a triangular wave is clamped.

Furthermore, if the ultrasonic output is not caused by constant regular changes, but has an output waveform that is randomly modulated depending on the circuit configuration, it will be even less likely that a mouse will become addicted to it. The number of speakers 5 is not necessarily limited to four, and more speakers may be added, and the switching circuits using the control circuit 3 and AND circuits 2a to 2d may also be used in other ways without being limited to the embodiment. A well-known circuit can be employed. Furthermore, each of the speakers 5a to 5d may not completely continue outputting sound, but may emit low-level output even during the time when no output is emitted in FIG. 2b. In this case, the simple circuit configuration for each speaker 5a to 5d is
This can be achieved by inserting a capacitor between them. Furthermore, if the amplification factors of the amplifiers 4a to 4d are changed in a time-series manner to change them regularly or randomly, the change in the level of the sound output becomes complicated and the extermination effect is further increased. As explained above, the pest control device according to the present invention modulates the ultrasonic power in a time-series manner, and
By using multiple speakers and switching between each speaker, it is possible to prevent small animals such as rats from becoming accustomed to the ultrasonic waves, to maintain the exterminating effect, and to be effective in a wide area. It has the advantage of being effective.

[Brief explanation of the drawing]

The drawings show an embodiment of the harmful small animal extermination device according to the present invention, and FIG. 1 is a circuit diagram thereof, FIG. 2 is a diagram showing the relationship between the ultrasonic output and the output of the speaker, and FIG. 3 is a diagram showing the relationship between the ultrasonic output and the output of the speaker. It is a graph diagram of an output. 1 is an oscillation circuit, 2a to M are AND circuits, 3 is a control circuit, 4a to 4d are amplifiers L, 5a to 5d are speakers, 6
is a clock oscillation circuit. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A single ultrasonic oscillation device that converts the oscillation frequency of ultrasonic waves in time series, and a plurality of ultrasonic oscillation devices that acoustically output the ultrasonic output signal of the ultrasonic oscillation device and are arranged at a distance from each other. What is claimed is: 1. A device for exterminating small harmful animals, comprising: a speaker device; and a switching device that changes the sound output level of each of these speaker devices while shifting the phase relationship with each other. 2. The pest control device according to claim 1, wherein the ultrasonic oscillation device and the switching device are housed in one of the speaker devices, and the other speaker devices are arranged individually.