CN202385662U

CN202385662U - Variable frequency ultrasonic mosquito repellent

Info

Publication number: CN202385662U
Application number: CN2011205706605U
Authority: CN
Inventors: 魏传永; 黄勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-31
Filing date: 2011-12-31
Publication date: 2012-08-22
Anticipated expiration: 2021-12-31

Abstract

The utility model relates to a variable frequency ultrasonic mosquito repellent. The variable frequency ultrasonic mosquito repellent consists of a 6V direct-current power supply, an ultrasonic oscillating circuit, an ultrasonic signal amplifying circuit and an ultrasonic transduction circuit. The mosquito repellent can imitate ultrasonic wave emitted by male mosquitoes by the electronic method, but human ears cannot detect the ultrasonic wave with the frequency of 21 to 23 kHz. By imitating the sound generated by wing vibration of male mosquitoes, the ultrasonic mosquito repellent can emit ultrasonic wave to make female mosquitoes reluctantly approach human beings, the female mosquitoes which have already mated can be repelled, so that the aim of avoiding the bites of female mosquitoes is fulfilled. Because different male mosquitoes have different response to ultrasonic frequency, the frequency of the ultrasonic wave emitted by the mosquito repellent is in a certain range, the variable frequency ultrasonic wave instead of fixed frequency sonic wave is emitted, so the mosquito repellent can achieve relatively good effects of repelling mosquitoes in different regions.

Description

The variable frequency type ultrasonic mosquito-driving device

Technical field

The utility model belongs to the application of electronic technology field, is about a kind of variable frequency type ultrasonic mosquito-driving device.

Background technology

Sting male mosquito and generally do not sting the people, the mosquito that stings the people mostly is the female mosquitoes of bosom ovum.Because female mosquitoes needs protein and energy during cytula, thus seek, bite warm-blooded animal, and it is approaching with male mosquito to be unwilling again.In a single day female mosquitoes feels that male mosquito flutters its wings up and down frequency 21～23kHz of sending hyperacoustic the time, and very responsive to the sound wave of 21～23kHz scope because of female mosquitoes, female mosquitoes will initiatively be escaped.The described variable frequency type ultrasonic mosquito-driving device of the utility model is to utilize the electronics mode to simulate the ultrasonic that male mosquito sends, and people's ear is that the ultrasonic of 21～23kHz is not heard at all to frequency.Through imitating the sound that male mosquito alar part vibration produces, the ultrasonic wave energy that mosquito-driving device sends is reluctant near human body female mosquitoes, drives mating through ultrasonic and crosses female mosquitoes, to reach the purpose of avoiding female mosquitoes to bite.Reaction has certain otherness to ultrasonic frequency because of different female mosquitoes; So mosquito-driving device sends frequency of ultrasonic certain limit is arranged; That is: what send is variable frequency type ultrasonic, rather than is fixed on some frequencies, thereby expelling mosquito all has reasonable effect in different regions.

It is more stable that the described ultrasonic of the utility model is driven the effect of female mosquito, and the ultrasonic acoustic intensity of wave is lower than normally acceptance value of 45 decibels of human bodies, and people's ear was not both heard and human body is had no influence.The ultrasonic mosquito-driving device is more satisfactory environment-protecting articles.

Below specify this variable frequency type ultrasonic mosquito-driving device related relevant technologies content in implementation process.

The utility model content

Goal of the invention and beneficial effect: the described variable frequency type ultrasonic mosquito-driving device of the utility model is to utilize the electronics mode to simulate the ultrasonic that male mosquito sends, and people's ear is that the ultrasonic of 21～23kHz is not heard at all to frequency.Through imitating the sound that male mosquito alar part vibration produces, the ultrasonic wave energy that mosquito-driving device sends is reluctant near human body female mosquitoes, drives mating through ultrasonic and crosses female mosquitoes, to reach the purpose of avoiding female mosquitoes to bite.Reaction has certain otherness to ultrasonic frequency because of different female mosquitoes; So mosquito-driving device sends frequency of ultrasonic certain limit is arranged; That is: what send is variable frequency type ultrasonic, rather than is fixed on some frequencies, thereby expelling mosquito all has reasonable effect in different regions.

The circuit working principle: accompanying drawing 1 is to produce frequency 21～23kHz continually varying ultrasonic mosquito repellent circuit working schematic diagram.Unijunction transistor VT1 and potentiometer RP and capacitor C 1 are formed a supersonic oscillations circuit.The 6V dc source charges to capacitor C 1 through potentiometer RP, when charging peaking voltage, and unijunction transistor VT1 conducting; And through resistance R 2 discharge, when the discharge of capacitor C 1 voltage drops to peak value when following, unijunction transistor VT1 ends; Charging～discharge so repeatedly～charging, circuit produces vibration.Regulator potentiometer RP can change the frequency of oscillation of oscillating circuit.The oscillator signal that produces is coupled to NPN type triode VT2 through capacitor C 2 and amplifies, and the signal after the amplification is sent to the ultrasonic wave transducer element by capacitor C 3, that is: piezoelectric ceramics piezo HA.

Technical scheme: the variable frequency type ultrasonic mosquito-driving device, form by 6V dc source, supersonic oscillations circuit, ultrasonic signal amplifying circuit and ultrasonic wave transducer circuit, it is characterized in that:

Supersonic oscillations circuit: form by unijunction transistor VT1, potentiometer RP, capacitor C 1, resistance R 1 and resistance R 2; The emitter e of unijunction transistor VT1 connects the end of potentiometer RP and an end of capacitor C 1; The anodal VCC of the other end of potentiometer RP and lever arm connection circuit thereof; The other end connection circuit ground GND of capacitor C 1, the end of the first base stage b1 connecting resistance R1 of unijunction transistor VT1, the anodal VCC of the other end connection circuit of resistance R 1; The end of the second base stage b2 connecting resistance R2 of unijunction transistor VT1, the other end connection circuit ground GND of resistance R 2;

Ultrasonic signal amplifying circuit and ultrasonic wave transducer circuit: form by capacitor C 2, NPN type triode VT2, resistance R 3, resistance R 4, capacitor C 3 and piezoelectricity singing piece HA; The base stage of NPN type triode VT2 connects an end of capacitor C 2 and an end of resistance R 3; The second base stage b2 of the other end order junction transistors VT1 of capacitor C 2; The anodal VCC of the other end connection circuit of resistance R 3, the end of the colelctor electrode connecting resistance R4 of NPN type triode VT2 and an end of capacitor C 3, the anodal VCC of the other end connection circuit of resistance R 4; The end of another termination piezoelectricity singing piece HA of capacitor C 3, the emitter stage connection circuit ground GND of the other end of piezoelectricity singing piece HA and NPN type triode VT2.

The anodal VCC of the anodal connection circuit of 6V dc source, the negative pole of 6V dc source links to each other with circuit ground GND.

Description of drawings

Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides a variable frequency type ultrasonic mosquito-driving device; The negative pole of the 6V dc source in the accompanying drawing 1 links to each other with circuit ground GND.

Embodiment

Circuit working schematic diagram and description of drawings according to variable frequency type ultrasonic mosquito-driving device shown in the accompanying drawing 1; And according to the annexation between the components and parts in the described each several part circuit of utility model content, and the components and parts technical parameter described in the embodiment requires to implement to realize the utility model.

The selection of components and parts and technical parameter thereof

VT1 is a unijunction transistor, and model is selected BT33C for use;

VT2 is a NPN type triode, pliotron among the optional 2SC9018 of model etc.;

The resistance of resistance R 1 is 100 Ω; The resistance of resistance R 2 is 51 Ω; The resistance of resistance R 3 is 47K Ω; Resistance R 4 resistances are 3.3K Ω; Semifixed resistor RP resistance is 51K Ω;

C1 is an electric capacity of the dacron, capacity 0.047 μ F; C2 is an electric capacity of the dacron, and capacity is 0.033 μ F; C3 is an electric capacity of the dacron, and capacity is 0.1 μ F;

HA is a piezoelectricity singing piece, and model is the HTD-27A type, diameter ￠ 27.35mm, and maximum sound intensity is 52dB, requires the diameter of piezoelectricity singing piece can not be greater than 30mm, otherwise the response of ultrasonic highest frequency will receive certain restriction;

6V dc source, the model of selecting for use are the 6V layer-built battery of 4F22-DC.

Circuit production main points and debugging

The components and parts performance that the circuit requirement of variable frequency type ultrasonic mosquito-driving device uses is intact, weld according to the annexation of components and parts shown in the accompanying drawing 1, the physics wiring of components and parts is conscientiously checked and check errorless after, circuit need not debugged and get final product operate as normal.

Circuit debugging and use

Whole elements in the variable frequency type ultrasonic mosquito-driving device circuit require to be installed on the printed circuit board, at last circuit board are placed in the plastic casing.Piezoelectric ceramic piece HA selects the HTD-27A type for use, can directly with 504 glue such as AR such as grade it be bonded at sound hole position in the plastic casing;

The repelling effect of variable frequency type ultrasonic mosquito-driving device depends primarily on the frequency of oscillation of circuit, should debug potentiometer RP repeatedly, makes the frequency of circuit oscillation interval at 21～23kHz, promptly is the frequency range of disliking most female mosquito;

The ultrasonic power output size of circuit is determining repelling effect, and hyperacoustic power output is big more, and then the mosquito repellent scope is bigger and effect is good more; Otherwise the more little then effect of hyperacoustic power output is poor more;

Improve hyperacoustic power output, can increase the one-level power output, also can directly 6V be made into the layer-built battery of 9V, also can obviously improve hyperacoustic radiation activity, but the highest 9V that do not surpass of the operating voltage of complete machine.

Claims

1. a variable frequency type ultrasonic mosquito-driving device is made up of 6V dc source, supersonic oscillations circuit, ultrasonic signal amplifying circuit and ultrasonic wave transducer circuit, it is characterized in that:

The supersonic oscillations circuit is made up of unijunction transistor VT1, potentiometer RP, capacitor C 1, resistance R 1 and resistance R 2; The emitter e of unijunction transistor VT1 connects the end of potentiometer RP and an end of capacitor C 1; The anodal VCC of the other end of potentiometer RP and lever arm connection circuit thereof; The other end connection circuit ground GND of capacitor C 1, the end of the first base stage b1 connecting resistance R1 of unijunction transistor VT1, the anodal VCC of the other end connection circuit of resistance R 1; The end of the second base stage b2 connecting resistance R2 of unijunction transistor VT1, the other end connection circuit ground GND of resistance R 2;

Ultrasonic signal amplifying circuit and ultrasonic wave transducer circuit are made up of capacitor C 2, NPN type triode VT2, resistance R 3, resistance R 4, capacitor C 3 and piezoelectricity singing piece HA; The base stage of NPN type triode VT2 connects an end of capacitor C 2 and an end of resistance R 3; The second base stage b2 of the other end order junction transistors VT1 of capacitor C 2; The anodal VCC of the other end connection circuit of resistance R 3, the end of the colelctor electrode connecting resistance R4 of NPN type triode VT2 and an end of capacitor C 3, the anodal VCC of the other end connection circuit of resistance R 4; The end of another termination piezoelectricity singing piece HA of capacitor C 3, the emitter stage connection circuit ground GND of the other end of piezoelectricity singing piece HA and NPN type triode VT2.

2. variable frequency type ultrasonic mosquito-driving device according to claim 1 is characterized in that: the anodal VCC of the anodal connection circuit of 6V dc source, the negative pole of 6V dc source links to each other with circuit ground GND.