GB2231999A - Apparatus for threatening nuisance animals - Google Patents
Apparatus for threatening nuisance animals Download PDFInfo
- Publication number
- GB2231999A GB2231999A GB9003948A GB9003948A GB2231999A GB 2231999 A GB2231999 A GB 2231999A GB 9003948 A GB9003948 A GB 9003948A GB 9003948 A GB9003948 A GB 9003948A GB 2231999 A GB2231999 A GB 2231999A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- random
- frequency
- oscillator
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 241001465754 Metazoa Species 0.000 title claims abstract description 15
- 241000700159 Rattus Species 0.000 abstract description 16
- 230000010355 oscillation Effects 0.000 abstract description 7
- 239000003990 capacitor Substances 0.000 description 7
- 101710170231 Antimicrobial peptide 2 Proteins 0.000 description 5
- 239000000306 component Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 101710170230 Antimicrobial peptide 1 Proteins 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000002311 subsequent effect Effects 0.000 description 1
- HODRFAVLXIFVTR-RKDXNWHRSA-N tevenel Chemical compound NS(=O)(=O)C1=CC=C([C@@H](O)[C@@H](CO)NC(=O)C(Cl)Cl)C=C1 HODRFAVLXIFVTR-RKDXNWHRSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05C—ELECTRIC CIRCUITS OR APPARATUS SPECIALLY DESIGNED FOR USE IN EQUIPMENT FOR KILLING, STUNNING, OR GUIDING LIVING BEINGS
- H05C1/00—Circuits or apparatus for generating electric shock effects
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/16—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves
- A01M29/18—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves using ultrasonic signals
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Insects & Arthropods (AREA)
- Birds (AREA)
- Engineering & Computer Science (AREA)
- Pest Control & Pesticides (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Catching Or Destruction (AREA)
Abstract
An apparatus for threatening nuisance animals such as rats comprises a random signal generator (RND) for generating a random signal whose frequency and voltage vary with time in random fashion and a spike generator (SPK) for generating spike signals. The random signal generator (RND) and the spike generator (SPK) are connected to produce a random control signal (RS) which is composed of a superposition of the random signal and the spike signals. By applying the control signal (RS) to a voltage-controlled oscillator an oscillation signal is generated whose frequency pattern corresponds to the random control signal. <IMAGE>
Description
Apparatus for for Threatening Nuisance Animals The present invention relates to an apparatus for threatenins nuisance animals such as rats with sound of ultrasonic frequency, thereby pursins and preventins such nuisance animals from invad ing houses, warehouses and other buildings or limited Places.
Rats dislike the sound of certain frequency range, and therefore, rats will be pursed from a Place such as warehouse, ceilins, etc. where rats inhabit if a sound source for seneratins such unpleasant sound is Placed near to the place. If entrance or outlet holes or paths which rats use, are exposed to the sound of ultrasonic frequency, invasion of rats will be prevented.
Recently, a variety of rat threatening aPParatuses have been proposed and actually used. Rats dislike the sound of 18 to 40 kilocycles althoush more or less depending on the kinds of rats.
Therefore, the rat threatenins apparatus uses the sound of selected frequency which target rats dislike most.
These rat threatenins apparatuses, however, have the effect of threatenins and purging rats only for a relativelY short period. The apparatuses will be useless when rats get used to the sound of selected frequency. The threatening effect can be made to persist more or less by amplifying such ultrasonic sound.
However, there is a fear that the amplification of such ultrasonic sound causes an ill effect on people and domestic animals.
In vii3w of the above one object of the Present invention is to Provide an apparatus for threatenins nuisance animals which apparatus is caPable of keePins the threatening effect Persistent without the necessity of amplifying the supersonic sound.
To attain this object an apparatus for threatenins nuisance animals accordins to the present invention uses ultrasonic sound of random frequency, thereby not allowins nuisance animals to set used to the sound; in which the apparatus for threatenins nuisance animals comprises: an oscillator responsive to a random control signal for seneratins an oscillation signal whose frequency varies with time; a control circuit including a random signal generator for seneratins a random signal which varies both in frequencv and voltage, and a spike signal generator, thereby generating a random control signal which is composed of a superposition of the random signal and the spike signal an amplifier circuit for amplifying the output signal of the oscillator; and a transducer for converting the output signal of the amplifier circuit to sonic vibration, whereby under the control oi the random control signal from the control circuit the oscillator may Produce a threatenins sisnal havins impulsive irequencv com- ponents in randomly varying oscillation frequency, said impulsive frequency components each havins a sudden vertical rise-andvertical fall or vertical fall-and-vertical rise variation in frequency.
This and other objects and advantases of the present invention will be understood from the followins descriPtion of an apparatus for threatenins nuisance animals according to one embodiment of the present invention, which is shown in accompanying drawinss:
Fig. 1 is a block diagram schematically showins the structure of the apparatus for threatenins nuisance animals;
Fis. 2 is a block diasram schematically showins the structure of a control circuit included in the threatenins aPParatus of
Fig. 1:
Fis. 3 is a block diagram schematical ly showins the structure of an oscillatins circuit included in the threatenins apparatus of Fis. 1: and
Fis. 4 IS a graph showing the frequency distribution in a threatening sound.
Referrins te Fig. 1, a threatenins apparatus according to one embodiment of the present invention is shown as comprising oscillator 1 ; control circuit 2; amplifier 3 and transducer 4. The oscillator 1 is of a variable frequency type, and the oscillation frequencY of the oscillator varies with the voltage of a control voltage signal applied to its terminal C. For example, the frequency varies over about 7 to 8 kilocycles above and below a predetermined center frequency. The center frequencv can be varied by adjustins a serifixed resistance VR. The frequency ranse within which the center frequency m a y be varied, extends from audio to supersonic frequencY (3 to 40 kilocYcles).
The control circuit 2 suPPlies a control signal to the osciilator 1 for controllins its frequency. As shown in Fig. 2, the control circuit 2 includes a random signal generator RND, a spike signal generator SPK, and a sate signal generator GS. The control sisnal aPpearins at the output terminal RS of the control circuit 2 is a random voltage signal havins a spike signal superposed thereon. As shown in Fis. 2, the random signal generator
RND includes a shift register SFR and a gate GT. A pulse generator PG is associated with the random signal generator RND. The shift resister SFR includes 16 stages, and the resistered content can be read from its terminals QO to Q15 in Parallel fashion.
The shifting operation is controlled by shift pulses, which are supplied from the Pulse generator PG to the terminal CK of the shift resister SFR.
The sate GT is an exclusive OR circuit, which is resPonsive to application of same sisnals to both input terminals for outputting the binary "1" signal, and is responsive to application of different sisnals to both input terminals for outputting the binary ".0" signal. This sate GT is used as a coincidence detec t ion circuit. As shown in Fis. 2, one input terminal of the gate
GT is connected to a stase of round number of the shift register
SFR, for examPle to the terminal Q6 of the 6th stase, whereas the other input termina' o; the sate GT is connected to a stage of odd number of the shift resister SFR, for examPle to the terminal
Q9 of the 9th stage.Upon coincidence of the signals appearing at these terminals Q6 and Q9 an outPut signal will be aPPlied from the sate GT to the lowest stase of the shift resister SFR via its terminal D. Then, the stored data will be shifted sequentially to the right, thereby Permittins random number to be stored in the shift register SFR.
Pieces of the so stored random number information will be selectively picked up via resistors "r", and will be summed. In this particular embodiment the terminals Q1, Q3, Q8, Q10, Q12 to
Q15 of the 1st, 3rd, 8th, 10th, 12th to 15th stases are connected to a common joint A. The common joint A is connected to the out pu t terminal RS of the control circuit 2 via a resistor "r1".
The summation o: the binary sisnals appearing across the resistors "r" will vary with the frequently varying random number information stored in the shift resister SFR, and accordingly the voltage appearing at the common joint A and hence the voltage appearins at the output terminal RS of the control circuit 2 will vary in random fashion, thus providing a random signal at the output terminal RS of the control circuit 2.
The Pulse generator PG is of a voltage-control led tYPe, and is responsive to a control signal for generating a train of pulses at a repetition rate varying over several cYcles around a siven center frequency for example, 50 cycles. As seen from Fig.
2, the voltage aPPearins at the common joint A is aPPlied to the control terminal C of the Pulse generator PG via a resistor "r2".
Therefore, the repetition rate of the Pulse signal appearing at the output terminal of the pulse generator PG will vary in random fashion in response to the random number information stored in the shift register SFR. The signal appearing at the output terfinal of the Pulse generator PG is applied to the shift register
SFR as a shiFt Pulse. As a result the random control signal appearins at the output terminal RS will vary randomlY both in voltage and Period.As seen from Fig. 2, the random control sig- nal is caused by usins random information as stored in one half of the stases in the shift register SFR and by applying to the inPut of the shift resister SFR the result of coincidence of the sisnals appearins at the output terminals of two stages ar bitrarilv selected. Therefore, sudden voltage rises and sub- sequent descents appear often in such a random control signal, and no similar voltage Pattern will appear within a relativelv short period.
The spike signal generator SPK is connected to the output of the pulse generator PG via a counter CNT. The spike sisnal generator SPK directs a derivative waveform to the terminal RS of the control circuit 2 to make up a random control signal along with the random signal of the shift resister SFR.
The sate signal generator GS is composed of a differential amplifier "amp". The random control signal is applied from the terminal RS of the control circuit 2 to the nesative terminal (-) of the amplifier "amP" whereas a reference voltage is aPPlied to the Positive terminal (+) of the amplifier "amp". The reference voltage aPpears across a véariable resistor VR, which alons with a resistor "r3", makes up a potentiometer connected to a d;c. volt- ase source Vcc. With this arrangement the gate signal appearing at the output terminal G remains at a positive logic level while the random control signal is lower than the reference voltage.
The sate signal, however, descends to sround level while the random control signal is higher than the reference voltage.
Fis. 3 shows one example of the oscillator 1. As shown in this drâwins, an amplifier AMP 1 is connected to the reset terminal R of a flip-flop FF whereas an amplifier AMP2 is connected to the set terminal S of the flip-flop FF. Each of these amplifiers AMP1 and AMP2 is of differential type, and therefore a positive signal will appear at the output terminal of the amplifier while the voltage at the positive inPut terminal of the amplifier is hisher than that at the nesative input terminal of the amPlifier.As shown, the voltage appearing at the joint X is applied to the positive input terminal of the amplifier AMP1; the voltage appearing at the joint Y is aPPlied to the nesative input terminal of the amplifier AMP1; and the voltage aPPearins at the output terminal of the amplifier AMP1 will be directed to the reset terminal R of the flip-flop FF. The voltage appearing at the joint Z is applied to the positive input terminal of the amplifier AMP2; the voltage aPPearins at the joint X is applied to the negative inPut terminal of the amlifier AMP2; and the voltage appearing at the output terminal of the amplifier AMP2 will be directed to the set terminal S of the flip-flop FF.The voltage appearing at the joint X will depend on the amount of electricity with which a capacitor C1 is charged.
The caPaCitor C1 will be charged with electricity by an electric current flowing from a voltage source Vcc through a semi-fixed resistor VR and a resistor R1 while a transistor T r remains nonconductive. The potential across the capacitor C1 will descend to ground level by allowins electricity to bleed throush a resistor R1 when the transistor Tr turns on. The transistor Tr will turn off when the flip-flop FF is set, and it will turn on when the flip-flop FF is reset. Therefore, the capacitor C1 will be charged while the flip-flop FF remains set.
The flip-flop FF will be reset when the Potential at the joint X rises over the Potential at the joint Y. Then, the transistor Tr will turn on, therebY allowins the electricity to bleed from the capacitor C1. Tne bleeding of electricity from the capacitor C1 continues until the potential at the Joint X descends below the potential at th joint Y, and then the flip-flop FF will be set, thereby causing the transistor Tr to turn off. This sequence will be repeated, permitting the flip-flop FF to be rePeatedlY set and reset. The settins and resettins period will become lons as the voltage difference between the joints X and Y increases.
The voltage appearing at the joint Y will depend on the random control signal, which is aPPlied from the control circuit 2 to the terminal C of the oscillator 1. The voltage appearing at the joint Z is a division of the voltage appearing at the joint Y, and is determined by R2 and R3.
The potential difference between the joints X and Y will vary with the random control signal , which is applied to the terminal
C of the oscillator 1. Therefore, the set-to-reset period of the f I i p-flop FF will increase (or decrease) with the increase (or decrease) of the Potential difference between the joints X and Y.
The signal appearing at the output terminal Q of the flip-flop is directed to the output term ma I OP of the oscillator 1 via the amPlifier AMP3. The set-to-reset Period of the fliP-floP FF or the oscillation frequency of the oscillator 1 can be controlled by a semi-fixed resistance VR. The adjustment of the semi-fixed resistance VR will change the time constant with which the capacitor C1 is charged, accordingly changing the set period of the flip-flop FF and hence the oscillation frequency of the os oscillator 1. The semi-fixed resistor VR is of the same tYPe as used in Fis. 1 , and is used to select the central frequency of the oscillator 1. The amplifier circuit 3 is a Power amPlifier circuit for amplifying the signal from the oscillator 1 and supplYing the so amplified signal to the transducer 4. This amplifier circuit 3 can function like a switch, Performing amplification so far as the sate signal aPPlied to the terminal G of the amplifier circuit 3 remains at a positive losic level, but stoPPing ampliiication when the voltage at the terminal G of the amplifier circuit 3 descends to sround potential. The transducer 4 is responsive to the signal from the amplifier circuit 3 for causing air vibration. A piezo speaker which is capable of gem- eratins supersonic sound at 40 KH z or more, may be used as a transducer.
The operation of the threatenins apparatus will be described below. First, the central frequency of the oscillator 1 is set for example, at 25 KHz by adjusting the semi-fixed resistor VR.
When electric power is supplied to the threatening apparatus, the control circuit 2 is put in operation as described earlier, thus causins a random control signal to apPear at the output terminal
RS of the control circuit 2. This random control signal varies randomly both in volt2se and duration under the control o f the random sisnâl generator RND. As described earlier, the sPike signal generator SPK senerates a spike signal whose voltage sud denlv rises and descends or vice versa. This rapidly chanting spike signal is combined with the random signal from the random signal generator RND at every one fourth of the Period with which the pulse generator PG senerates pulse sisnals.The resultant random control signal is directed from the output terminal RS of the control circuit 2 to the input terminal C of the oscillator 1 to control the oscillation frequency. The frequency of the random signal apPearins at the output terminal OP of the oscillator 1 varies about 8 KHz above and below the center frequency of 25
KHz1 and the duration of the random signal varies randomly between 1/44 and 1/55 seconds. In the frequencY range of the random control signal there appear frequently whiskers each composed of a vertical descent (or r ise)-and-subsequent vertical rise (or descent)1 corresPondins to the spike signal, constituting a shockins sound. A shockins sound will be caused if a similar chanse appears in voltage.
Thus, the oscillator 1 of the threatenins apparatus can gen- crate a threatenins signal of random frequency containing shock ing comPonents and unP!easing frequency, thereby making a sound which is intolerably unpleasant to nuisance animals such as rats.
Fis. 4 shows a sraPh representing one example of such a threatenins signal (abscissa: time and ordinate: frequency). The shockins comPonents are indicated at I . This threatening signal
is amplified by the amplifier 3, and then the so amplified threatenins signal is directed to the transducer 4, which converts the threatenins sisnal to ultrasonic sound for radiation in the air.When the sate signal aPPlied to the terminal G of the amplifier 3 descends to the sround potential, the amplification operation will stop, thereby preventing seneration of audible frequencY sound, which would cause nuisance to PeoPle if generated. Specifically, when the random control signal rises beYond a Predetermined reference value, the sate signal will descend to sound potential. Therefore, the audible components of the threatenins signal cannot be amplified simply by selecting for the reference value, the voltage of random control signal which Permits the oscillator 1 to senerate the highest frequency fa of the audible range in which PeoPle can hear sound.This reference value can be selected by adjusting the variable resis- tor VR of the sate signal generator GS. Thus, even if the threatening apparatus is used in a Place where PeoPle live, no disturbance will be caused to peoPle because no audible sound will be venerated. If it is desired that an audible sound be selected to purse nuisance animals, the variable resistor VR can be adjusted to Permit the threatening apparatus to generate such audible sound.
Experimental results reveal that threatenins effect is not lost even after the use of the threatenins apparatus for an elongated period. Modifications can be Performed without departing from the spirit of the Present invention. For example, the stages of the number which is different from that in this particular embodiment, may be used. A random signal generator using differvent losic algorithm may be used. An oscillator which may be controlled by sisnals other than voltage, may be used.
Claims (3)
1. An apparatus for threatening nuisance animals comprisin,-; a variable frequency oscillator coupled via an amplifier circuit to a sonic transducer, and a control circuit including a random signal generator for generating a signal for controlling said oscillator, said sinai being such as to provide for random variation in the frequency of said oscillator and to fluctuate at a frequency that is itself randomly variable, and further including a spike signal generator for superimposing on said signal of the random signal generator spike signals providing for impulsive frequency components of the oscillator signal said impulsive frequency components each having a sudden vertical rise and vertical fall or vertical fall and vertical rise variation in frequency.
2. An apparatus as claimed in Claim 1, wherein said variable frequency oscillator is a voltage controlled oscillator and said random signal generator is arranged to generate a signal of varying frequency and varying voltage.
3. An apparatus substantially as described herein with any one of Figs. 1-3 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1052900A JPH02234630A (en) | 1989-03-07 | 1989-03-07 | Menacing device to harmful animal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9003948D0 GB9003948D0 (en) | 1990-04-18 |
| GB2231999A true GB2231999A (en) | 1990-11-28 |
Family
ID=12927725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9003948A Withdrawn GB2231999A (en) | 1989-03-07 | 1990-02-21 | Apparatus for threatening nuisance animals |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH02234630A (en) |
| KR (1) | KR900015584A (en) |
| GB (1) | GB2231999A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0664079A1 (en) * | 1994-01-19 | 1995-07-26 | Oliver Lang | Device for frightening noxious animals by emitting ultrasonic signals |
| GB2294352A (en) * | 1994-10-21 | 1996-04-24 | Glenn Ferguson | Animal scaring device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008017763A (en) * | 2006-07-12 | 2008-01-31 | Adokin Kankyo Kk | Harmful animal-repelling system |
| GB0707640D0 (en) * | 2007-04-20 | 2007-05-30 | Strathclyde | Acoustic deterrence |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0129415A2 (en) * | 1983-06-17 | 1984-12-27 | Hideo Hayakawa | Method of and system for threatening pests |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6149A (en) * | 1984-06-12 | 1986-01-06 | Ono Pharmaceut Co Ltd | Novel 13-aza-14-oxo-txaz analogs, their preparation and remedy for diseases caused by thromboxan, containing the same |
-
1989
- 1989-03-07 JP JP1052900A patent/JPH02234630A/en active Pending
- 1989-11-30 KR KR1019890017909A patent/KR900015584A/en not_active Application Discontinuation
-
1990
- 1990-02-21 GB GB9003948A patent/GB2231999A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0129415A2 (en) * | 1983-06-17 | 1984-12-27 | Hideo Hayakawa | Method of and system for threatening pests |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0664079A1 (en) * | 1994-01-19 | 1995-07-26 | Oliver Lang | Device for frightening noxious animals by emitting ultrasonic signals |
| GB2294352A (en) * | 1994-10-21 | 1996-04-24 | Glenn Ferguson | Animal scaring device |
| GB2294352B (en) * | 1994-10-21 | 1998-09-02 | Glenn Ferguson | Cat deterring device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR900015584A (en) | 1990-10-27 |
| JPH02234630A (en) | 1990-09-17 |
| GB9003948D0 (en) | 1990-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4687457A (en) | Hand-held puppet with pseudo-voice generation | |
| US3794841A (en) | Light coupling data transfer system | |
| US4314423A (en) | Sound producing toy | |
| JPH0233280Y2 (en) | ||
| JPS54152846A (en) | Pulse duration modulating signal amplifier circuit | |
| US4065767A (en) | Programmable electronic siren | |
| US5243327A (en) | Audible alarm for motion detection using dual mode transducer | |
| GB2231999A (en) | Apparatus for threatening nuisance animals | |
| US4289307A (en) | Riding toy with sound effects | |
| US4255745A (en) | Apparatus for audible altering of enclosure opening | |
| DE60303648D1 (en) | Hazard detector with modulated test signal | |
| KR910017738A (en) | High Frequency Continuous Time Filter | |
| US4434325A (en) | Volume control for an audio apparatus | |
| JPS56152372A (en) | Laser recording device | |
| US3458770A (en) | Light integrating circuit with current producing photosensitive cell in the bridge circuit | |
| YU284081A (en) | Circuit assembly of an arrangement for metal coin control | |
| US4481504A (en) | Sound level alarm which ignores transient sounds | |
| US6177863B1 (en) | Audio alarm signal initiation device | |
| US3550117A (en) | Timing apparatus | |
| ATE48213T1 (en) | ELECTRONIC CIRCUITS AND SIGNAL GENERATOR USING THESE CIRCUITS. | |
| US3453562A (en) | Delta modulator with uniform quantizing steps | |
| JPS6416080A (en) | Noise reduction circuit | |
| JPS56109012A (en) | Automatic gain control circuit | |
| US3514632A (en) | Programmable sawtooth waveform generator | |
| SU1396245A1 (en) | Pulse generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |