CN203851113U - Day-night switching bird repelling device - Google Patents
Day-night switching bird repelling device Download PDFInfo
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- CN203851113U CN203851113U CN201420274253.3U CN201420274253U CN203851113U CN 203851113 U CN203851113 U CN 203851113U CN 201420274253 U CN201420274253 U CN 201420274253U CN 203851113 U CN203851113 U CN 203851113U
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Abstract
The utility model discloses a day-night switching bird repelling device which comprises a power supply. The bird repelling device further comprises a square wave generator, a multivibrator and an amplifier stage used for amplifying and outputting audio signals. The output end of the multivibrator is connected with the input end of the amplifier stage. The day-night switching bird repelling device provided by the utility model adopts a solar battery as the power supply and requires no frequent replacement of a direct current battery. Meanwhile, the solar battery can work at daylight. At nights with low visibility and rainy days, bird repelling operations are normally not required. The day-night switching bird repelling device is suitably used in places such as airports, etc. Bird repelling effects through supersonic waves are achieved. Meanwhile, supersonic wave and noise pollution at unnecessary time periods is reduced.
Description
Technical field
The utility model relates to electronic circuit field, particularly, relates to a kind of bird-scaring unit that switches round the clock.
Background technology
Ultrasonic wave is a kind of frequency higher than the sound wave of 20000 hertz, its good directionality, and penetration capacity is strong, is easy to obtain more concentrated acoustic energy, in water transmission distance, can be used for finding range, tests the speed, cleans, welding, rubble, sterilizing etc.In medical science, military affairs, industry, agricultural, there is a lot of application.Ultrasonic wave is gained the name because of the upper limit of hearing that its lower-frequency limit approximates greatly people.
At power domain, switching round the clock bird-scaring unit can drive bird for electrical network, and the application under the low frequency required precisions such as field expelling parasite although existing equipment can produce supersonic wave bird driving, produces the clutter of a large amount of audio sections simultaneously, and shrillness, causes noise pollution.
Utility model content
For overcoming the existing technological deficiency that bird-scaring unit causes noise pollution of switching round the clock, the utility model discloses a kind of bird-scaring unit that switches round the clock.
Switch round the clock bird-scaring unit, comprise power supply, also comprise square-wave generator, multivibrator and for amplifying and the amplifying stage of output audio signal, the output of described multivibrator is connected with the input of amplifying stage;
Described multivibrator comprises a pair of input triode and a pair of resonant capacitance pair that parameter is identical; Each input transistor base is inputted between transistor collector and is connected by a resonant capacitance with another, input transistor emitter is in series with emitter resistance between negative sense power end, base stage is connected with forward power end by base resistance, and collector electrode is connected with forward power end by collector resistance; Described forward power end is connected with DC power supply by the second isolated tube, and described negative sense power end is connected with ground wire by the first isolated tube; The square wave output of described square-wave generator is connected with homophase on-off mode with first, second isolated tube;
Described amplifying stage is composed in series by amplifying NMOS pipe and audio frequency power amplifier, and described amplification NMOS tube grid connects the collector electrode of arbitrary input triode by high pass RC filter;
Described power supply is comprised of solar cell, DC power supply, voltage comparator and power supply switch tube, the input of described power supply switch tube and output are connected respectively the power line of solar cell and subsequent conditioning circuit, the control end of described power supply switch tube is connected with the output of voltage comparator, and two comparison inputs of described voltage comparator connect respectively solar cell and DC power supply.
Concrete, described square-wave generator is comprised of triangle wave circuit, pwm comparator and reference voltage source, the output of described triangle wave circuit and reference voltage source is connected respectively the input of pwm comparator, and described pwm comparator output is connected with the signal trigger end of multivibrator.
Further, described reference voltage source is comprised of the first fixed resistance and the first adjustable resistance that are connected between VDD-to-VSS line, and the common node of two resistance is as reference voltage output end.
Further, described triangle wave circuit is comprised of charging valve, reset transistor, charging capacitor, pull-up resistor, inverter and regulating resistance string, described charging capacitor and regulating resistance connection in series-parallel are between charging valve and ground wire, charging valve source class connects power supply, after pull-up resistor and reset transistor series connection, be connected between VDD-to-VSS line, pull-up resistor is connected charging valve grid with reset transistor common port, reset transistor grid connects inverter output, and the input of described inverter connects the intermediate node of regulating resistance string.
Further, described regulating resistance string is comprised of fixed resistance and adjustable resistance.
Concrete, described the first isolated tube is PMOS, the second isolated tube is NMOS.
Concrete, in described high pass RC filter, capacitor's capacity is 1-100 microfarad, resistance value is 200K-2M.
The bird-scaring unit that switches round the clock described in the utility model, the common separation device combination extremely low by a large amount of use costs realizes hyperacoustic generation and enlarging function, adopt solar cell as power supply, need not frequently change dc-battery, solar cell is worked between daytime simultaneously, in evening and the rainy day of visibility poor, conventionally also need not drive bird operation, be applicable to the use in the locations such as airport, when obtaining supersonic wave bird driving effect, reduced the ultrasonic noise pollution that involves disconnected when unnecessary.
Accompanying drawing explanation
Fig. 1 is a kind of embodiment schematic diagram of the utility model;
Mark and corresponding parts title: T1-the first input triode in accompanying drawing, T2-the second input triode, INV-inverter, P1-charging valve, P2-the first isolated tube, N1-amplifies NMOS pipe, N2-reset transistor, N3 – the second isolated tube, N4-power supply switch tube, RPU-pull-up resistor, R21-the first fixed resistance, R22-the first adjustable resistance, R31-the second fixed resistance, R32-the second adjustable resistance, RC-collector resistance, RE-emitter resistance RB-base resistance, RF-filtering adjustable resistance, CF-filter capacitor, COMP1-pwm comparator, COMP2-voltage comparator, C1-the first resonant capacitance, C2-the second resonant capacitance, C3-the 3rd resonant capacitance, OP-power amplifier, DC-DC power supply, SDC-solar cell.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is done to detailed description further, but execution mode of the present utility model is not limited to this.
The bird-scaring unit that switches round the clock described in the utility model, comprises power supply, also comprises square-wave generator, multivibrator and for amplifying and the amplifying stage of output audio signal, the output of described multivibrator is connected with the input of amplifying stage;
Described multivibrator comprises a pair of input triode and a pair of resonant capacitance pair that parameter is identical; Each input transistor base is inputted between transistor collector and is connected by a resonant capacitance with another, input transistor emitter is in series with emitter resistance between negative sense power end, base stage is connected with forward power end by base resistance, and collector electrode is connected with forward power end by collector resistance; Described forward power end is connected with DC power supply by the second isolated tube, and described negative sense power end is connected with ground wire by the first isolated tube; The square wave output of described square-wave generator is connected with homophase on-off mode with first, second isolated tube;
Described amplifying stage is composed in series by amplifying NMOS pipe and audio frequency power amplifier, and described amplification NMOS tube grid connects the collector electrode of arbitrary input triode by high pass RC filter;
Described power supply is comprised of solar cell, DC power supply, voltage comparator and power supply switch tube, the input of described power supply switch tube and output are connected respectively the power line of solar cell and subsequent conditioning circuit, the control end of described power supply switch tube is connected with the output of voltage comparator, and two comparison inputs of described voltage comparator connect respectively solar cell and DC power supply.
Basic principle of the present utility model is to produce after square wave; utilize the self-excitation of multi resonant oscillator to produce second harmonic; because the relative first-harmonic of frequency of second harmonic is higher; and frequency band is wider; when frequency input signal is during at sound wave Near The Upper Limit; conventionally can produce the secondary wave that is positioned at supersonic band, then from audio frequency power amplifier, export after twice ultrasonic ripple is amplified.
Square-wave generator can be used existing integrated circuit (IC) chip, also can select discrete device to build voluntarily, as provided a kind of specific implementation of the present utility model in Fig. 1, described square-wave generator is comprised of triangle wave circuit, pwm comparator COMP1 and reference voltage source, the output of described triangle wave circuit and reference voltage source is connected respectively the input of pwm comparator, and described pwm comparator output is connected with the signal trigger end of multivibrator.Wherein said reference voltage source is comprised of the first fixed resistance and the first adjustable resistance that are connected between VDD-to-VSS line, and the common node of two resistance is as reference voltage output end.By regulating adjustable resistance, can regulate reference voltage point, thus the duty ratio of regulation output square wave.
Between the graduating maximum voltage value and minimum voltage value producing in triangle wave circuit of reference voltage value, be input to after pwm comparator simultaneously, the principle based on pulse width modulation, comparator output terminal produces a square-wave signal that frequency is identical with triangular wave frequency.
When solar cell output voltage is lower, voltage comparator output level forces power supply switch tube N4 to close, solar cell SDC voltage under solar radiation rises, when rising to direct voltage with DC power supply DC output when consistent, the upset of voltage comparator COMP2 output voltage, power supply switch tube N4 opens, solar cell starts to power to subsequent conditioning circuit, here the effect of DC power supply DC reality is a reference voltage, this reference voltage value can be suitably higher than the operating voltage of subsequent conditioning circuit, for the possible decline of solar cell output voltage after the conduction voltage drop of power supply switch tube N4 and conducting reserves surplus.
The principle of the utility model based on simplified design, in Fig. 1, provided a kind of concrete producing method of triangle wave circuit, triangle wave circuit is by charging valve P1, reset transistor N2, charging capacitor C3, pull-up resistor RPU, inverter INV and regulating resistance string form, described charging capacitor and regulating resistance connection in series-parallel are between charging valve and ground wire, charging valve is P pipe, source class connects power supply, after pull-up resistor and reset transistor series connection, be connected between VDD-to-VSS line, pull-up resistor is connected charging valve grid with reset transistor common port, reset transistor grid connects inverter output, the input of inverter connects the intermediate node of regulating resistance string.
Capacitor charging-feedback-electric discharge-charging cycle process that above-mentioned circuit for generating triangular wave utilization is basic, suppose that the upper voltage of starting stage charging capacitor C3 is zero, P1 opens, for capacitor charging, utilize regulating resistance string to set the upper limit threshold of capacitor charging, as shown in Figure 1, regulating resistance string is connected by the second fixed resistance and the second adjustable resistance, intermediate node is Voltage-output point, when the magnitude of voltage of intermediate node reaches the logic high of connected inverter, inverter output low level, reset transistor N2 is closed, effect due to pull-up resistor RPU, charging valve grid voltage raises, P pipe is closed, C3 voltage discharges by regulating resistance string, again overturn to inverter.
Can, at charging valve source class series limiting resistor RIL, regulate charging current.
Utilize pwm comparator COMP1, based on known pulse width modulation principle, by triangular wave and datum mark pressure ratio, from the output of COMP1, obtain square-wave signal.
Square-wave signal is input to the input of multivibrator.
Square-wave signal is input to the input of multivibrator, as shown in Figure 1, utilizes multivibrator technology, can obtain high frequency time harmonic wave, and frequency range contains ultrasonic wave range, once multivibrator triggers, between two temporary stable states, switches continuously.
Utilizing multivibrator to produce high frequency high order harmonic component is ripe prior art, here sketch the operation principle of multivibrator: utilize the technological parameter error certainly existing between two triode T1 and T2, when T1 is saturated, its collector potential is dragged down, force the base potential of T2 to decrease, make T2 cut-off, C2 is charged by collector resistance RC by power supply, simultaneously due to T1 conducting, make C1 electric discharge, T2 base voltage rises, until T2 conducting, once T2 conducting, enter rapidly saturation region, repeat said process, just conduction pipe is T2, blanking tube is T1.According to existing theory, above-mentioned cycle of oscillation T=1.4RB*C, wherein C is the capacitance of C1 or C2, RB is base resistance resistance.Suitable value, can make the harmonic frequency that produces all or large part in supersonic range.
The utility model is isolated the power and ground of multivibrator by two isolated tubes, isolated tube is respectively PMOS pipe and NMOS pipe, when wherein PMOS is due to conducting, grid voltage is zero, for reducing conduction voltage drop, PMOS pipe is applicable to isolation low pressure, therefore for isolated ground, in like manner, select NMOS pipe for isolating the power line of high voltage.Adopt isolated tube open and close as startup and the shutdown signal of multivibrator, be beneficial to and improve output waveform, output square-wave waveform is precipitous, and amplitude is large.So-called same being connected refers to that two isolated tubes open or close simultaneously.
The output signal of multivibrator connects and amplifies NMOS tube grid through high pass RC filter, provide as shown in Figure 1 the specific implementation of high pass filter, by being connected to multivibrator output and amplifying the filter capacitor CF between NMOS tube grid and be connected to the filter resistance RF amplifying between NMOS tube grid and ground, form, select the product of RF and CF, make the bandwidth starting point of high pass filter be greater than audio section 20K hertz frequency range, for example selecting capacitor's capacity is 1-100 microfarad, resistance value is 200K-2M, only the signal of supersonic range is with to logical amplification.
As mentioned above, can realize preferably the utility model.
Claims (7)
1. switch round the clock bird-scaring unit, it is characterized in that, comprise power supply, also comprise square-wave generator, multivibrator and for amplifying and the amplifying stage of output audio signal, the output of described multivibrator is connected with the input of amplifying stage;
Described multivibrator comprises a pair of input triode and a pair of resonant capacitance pair that parameter is identical; Each input transistor base is inputted between transistor collector and is connected by a resonant capacitance with another, input transistor emitter is in series with emitter resistance between negative sense power end, base stage is connected with forward power end by base resistance, and collector electrode is connected with forward power end by collector resistance; Described forward power end is connected with DC power supply by the second isolated tube, and described negative sense power end is connected with ground wire by the first isolated tube; The square wave output of described square-wave generator is connected with homophase on-off mode with first, second isolated tube;
Described amplifying stage is composed in series by amplifying NMOS pipe and audio frequency power amplifier, and described amplification NMOS tube grid connects the collector electrode of arbitrary input triode by high pass RC filter;
Described power supply is comprised of solar cell, DC power supply, voltage comparator and power supply switch tube, the input of described power supply switch tube and output are connected respectively the power line of solar cell and subsequent conditioning circuit, the control end of described power supply switch tube is connected with the output of voltage comparator, and two comparison inputs of described voltage comparator connect respectively solar cell and DC power supply.
2. the bird-scaring unit that switches round the clock according to claim 1, it is characterized in that, described square-wave generator is comprised of triangle wave circuit, pwm comparator and reference voltage source, the output of described triangle wave circuit and reference voltage source is connected respectively the input of pwm comparator, and described pwm comparator output is connected with the signal trigger end of multivibrator.
3. the bird-scaring unit that switches round the clock according to claim 2, is characterized in that, described reference voltage source is comprised of the first fixed resistance and the first adjustable resistance that are connected between VDD-to-VSS line, and the common node of two resistance is as reference voltage output end.
4. the bird-scaring unit that switches round the clock according to claim 2, it is characterized in that, described triangle wave circuit is comprised of charging valve, reset transistor, charging capacitor, pull-up resistor, inverter and regulating resistance string, described charging capacitor and regulating resistance connection in series-parallel are between charging valve and ground wire, charging valve source class connects power supply, after pull-up resistor and reset transistor series connection, be connected between VDD-to-VSS line, pull-up resistor is connected charging valve grid with reset transistor common port, reset transistor grid connects inverter output, and the input of described inverter connects the intermediate node of regulating resistance string.
5. the bird-scaring unit that switches round the clock according to claim 4, is characterized in that, described regulating resistance string is comprised of fixed resistance and adjustable resistance.
6. the bird-scaring unit that switches round the clock according to claim 1, is characterized in that, described the first isolated tube is PMOS, and the second isolated tube is NMOS.
7. the bird-scaring unit that switches round the clock according to claim 1, is characterized in that, in described high pass RC filter, capacitor's capacity is 1-100 microfarad, and resistance value is 200K-2M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420274253.3U CN203851113U (en) | 2014-05-27 | 2014-05-27 | Day-night switching bird repelling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420274253.3U CN203851113U (en) | 2014-05-27 | 2014-05-27 | Day-night switching bird repelling device |
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| Publication Number | Publication Date |
|---|---|
| CN203851113U true CN203851113U (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420274253.3U Expired - Fee Related CN203851113U (en) | 2014-05-27 | 2014-05-27 | Day-night switching bird repelling device |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105101590A (en) * | 2015-10-01 | 2015-11-25 | 蒋桂荣 | LED street lamp with unintermittent charging function |
| CN105120583A (en) * | 2015-10-02 | 2015-12-02 | 袁芬 | Daytime and nighttime rechargeable LED (Light Emitting Diode) rod-type illumination device |
| CN105346707A (en) * | 2015-12-02 | 2016-02-24 | 上海航空电器有限公司 | Undercarriage operation switch with day night switching indicating function |
-
2014
- 2014-05-27 CN CN201420274253.3U patent/CN203851113U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105101590A (en) * | 2015-10-01 | 2015-11-25 | 蒋桂荣 | LED street lamp with unintermittent charging function |
| CN105101590B (en) * | 2015-10-01 | 2016-06-15 | 张�雄 | The LED street lamp of uninterrupted charging |
| CN105120583A (en) * | 2015-10-02 | 2015-12-02 | 袁芬 | Daytime and nighttime rechargeable LED (Light Emitting Diode) rod-type illumination device |
| CN105346707A (en) * | 2015-12-02 | 2016-02-24 | 上海航空电器有限公司 | Undercarriage operation switch with day night switching indicating function |
| CN105346707B (en) * | 2015-12-02 | 2023-08-15 | 上海航空电器有限公司 | Undercarriage control switch with day-night conversion indication function |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20200527 |
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| CF01 | Termination of patent right due to non-payment of annual fee |