Communications – electrical: acoustic wave systems and devices – Transmitter systems – Animal control
Reexamination Certificate
2000-05-17
2001-09-04
Lobo, Ian J. (Department: 3643)
Communications, electrical: acoustic wave systems and devices
Transmitter systems
Animal control
C116S02200A
Reexamination Certificate
active
06285630
ABSTRACT:
FIELD OF THE INVENTION
The present invention is related to a bird-expelling device, and more particular to an auto-control bird-expelling device which can perform or suspend a bird-expelling operation in response to environmental change.
BACKGROUND OF THE INVENTION
Birds, especially those who eat crops, have been brought troubles to farmers for centuries. The use of a scarecrow is a traditional way to prevent birds from approaching crops. With the development in science and technology, the role of a scarecrow is replaced by an electronic bird-expelling device such as the one disclosed in Huang, Taiwanese Patent Publication No. 308797 filed Nov. 9, 1996, which is incorporated herein for reference. Huang's bird-expelling device has to be manually controlled through a main frame to control the ON/OFF operations of sounding devices which are distributed in the farm and interconnected to the main frame through transmission wires. The sounding devices are stored therein audio data of eagle's sound, and sounding eagle's whistle to scare birds away while being turned ON. Accordingly, complicated transmission wires are needed for interconnecting the sounding devices with the main frame. Further, the continuous eagle sounding not only wastes energy but also results in noise pollution.
SUMMARY OF THE INVENTION
Therefore, an object of the present invention is to provide an auto-control bird-expelling device which functions independently.
Another object of the present invention is to provide an auto-control bird-expelling device which performs or suspends a bird-expelling operation in response to environmental change.
According to a first aspect of the present invention, an auto-control bird-expelling device includes a detector for generating a triggering signal in response to the entrance of a bird into a specified region; and a bird-expelling generator electrically connected to the detector for generating a bird-expelling signal in response to the triggering signal, thereby driving the bird away.
Preferably, the detector is a PIR motion detector which senses heat to determine whether there is something unusual getting into the specified region. By adjusting the position and the orientation of the PIR motion detector, the specified region can be suitably adjusted. For example, the specified region can be a lying cone-shaped region when the PIR motion detector is mounted on a standing pole.
In an embodiment, the bird-expelling signal is a sound of a fierce bird such as a hawk, an eagle or falcon, and the bird-expelling signal generator includes an audio-data storing device for storing audio data of the sound of the fierce bird, and outputting an electric signal indicative of the sound of the fierce bird in response to the triggering signal; an amplifier electrically connected to the audio-data storing device for intensifying a power of the electric signal to output an actuating signal; and a speaker electrically connected to the amplifier for sending out the bird-expelling signal equivalent to the sound of the fierce bird in response to the actuating signal. Alternatively, the bird-expelling device can be any other visual or audio signal as long as the purpose of driving the intruding birds away can be achieved.
Preferably, the auto-control bird-expelling device further includes a volume adjuster electrically connected to the amplifier to adjust a gain of the amplifier so as to control the volume of the sound of the fierce bird.
Preferably, the auto-control bird-expelling device further includes a switch electrically connected to the bird-expelling signal generator for providing a user to optionally disable the detector, and the bird-expelling signal generator generates the bird-expelling signal at a predetermined interval when the detector is disabled; and a time-interval adjuster electrically connected to the bird-expelling signal generator for providing a user to optionally adjust the predetermined interval.
Preferably, the auto-control bird-expelling device further includes a first photo-sensing device electrically connected to the bird-expelling signal generator for disabling the bird-expelling signal generator when the detector is disabled and an intensity of the environmental light is lower than a threshold value. The first photo-sensing device can be the one including a CDS photo-sensitive resistor.
Preferably, the auto-control bird-expelling device further includes a second photo-sensing device electrically connected to the detector for disabling the detector when an intensity of the environmental light is lower than a threshold value. The second photo-sensing device can be the one including a CDS photo-sensitive resistor.
According to a second aspect of the present invention, an auto-control bird-expelling device includes a bird-expelling signal generator for generating a bird-expelling signal to drive a bird away; and a first photo-sensing device electrically connected to the bird-expelling signal generator for generating a disabling signal to disable the bird-expelling signal generator when an intensity of the environmental light is lower than a threshold value.
Preferably, the auto-control bird-expelling device further includes a controller electrically connected to the bird-expelling signal generator to have the bird-expelling signal generator generate the bird-expelling signal at a predetermined interval. The controller preferably includes a time-interval adjuster electrically connected to the bird-expelling signal generator for providing a user to optionally adjust the predetermined interval.
REFERENCES:
patent: 4658386 (1987-04-01), Morris
patent: 4769794 (1988-09-01), Beuter et al.
patent: 5425192 (1995-06-01), Negre
patent: 5450063 (1995-09-01), Peterson et al.
patent: 3625773 C1 (1987-09-01), None
patent: 2 161 974 (1986-01-01), None
patent: 2 166 277 (1986-04-01), None
patent: 2 235 979 (1991-03-01), None
patent: 2-255-217 (1992-10-01), None
patent: 7-313038 (1995-12-01), None
patent: 308797 (1989-03-01), None
Arent Fox Kintner & Plotkin & Kahn, PLLC
Lobo Ian J.
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