CN202999165U

CN202999165U - Electronic mosquito repellent

Info

Publication number: CN202999165U
Application number: CN 201220634827
Authority: CN
Inventors: 王强; 杨宇飞; 溥于慧
Original assignee: Dalian Maritime University
Current assignee: Dalian Maritime University
Priority date: 2012-11-27
Filing date: 2012-11-27
Publication date: 2013-06-19
Anticipated expiration: 2022-11-27

Abstract

The utility model discloses an electronic mosquito repellent which comprises a high gain, a power supply, an indicator light, an amplifier, a feedback network and an adjustable potentiometer, wherein the indicator light and the power supply are electrically connected; the power supply is in signal connection with the high gain; the feedback network are in signal connection with the high gain; and the adjustable potentiometer is in signal connection with the feedback network and the amplifier. According to the electronic mosquito repellent, the electronic component cost during manufacturing is low, and the electronic components are frequently-used elements in electronic design, so that the cost of the whole manufacturing process is reduced greatly; as small signals are output, the consumed power is low; the electronic mosquito repellent can be supplied with electricity by a battery, carried conveniently and operated simply, causes no pollution to the environment and no damage to human bodies, and cannot produce dead mosquito bodies and cause damage to the indoor environment; and when the service life expires, the electronic mosquito repellent can be recycled for reutilization, so that raw material can be used sustainably.

Description

Electronic mosquito repellent

Technical field

The utility model relates to the daily necessities field.

Background technology

arrive summer one, mosquito is invaded and harassed wantonly, use not only mosquito repellent fully of traditional mosquito-repellent liquid medicine, also might cause the damage of skin, especially the thing of a headache especially for some allergic people, and the use of mosquito-repellent water also might produce pollution to environment, in addition, mosquito is very common a kind of harmful insects of summer and autumn, can propagate numerous disease, mainly contain malaria, encephalitis B, filariosis, dengue fever and yellow fever etc., affect health, usually people come mosquito-expelling and antipruritic with floral water, deodorization and sterilization, if but that improper use not only can endanger is healthy, serious also can be fatal, these mosquito-repellent water essence are alcoholic solutions of essence, in case will light near burning things which may cause a fire disaster, and enter eyes and can bring no small injury to eyes.

Summary of the invention

In order to overcome the problem of above-mentioned prior art, the utility model provides a kind of electronic mosquito repellent.

In order to achieve the above object, a kind of electronic mosquito repellent that provides.The indicator lamp VD of described electronic mosquito repellent connects rear with the 6th resistance R 6 and power supply GB forms the loop; Electroceramics buzzing sheet BC connects rear with the 3rd capacitor C3, the 5th resistance R 5 and power supply GB forms the loop; The base stage of the second unijunction transistor VT2 is connected with the positive pole of power supply GB afterwards with the 4th resistance R 4 series connection, the emitter stage of the second unijunction transistor VT2 is connected with the negative pole of power supply GB, and the colelctor electrode of the second unijunction transistor VT2 is connected with the positive pole of power supply GB afterwards with the 5th resistance R 5 series connection; The emitter stage of the first unijunction transistor VT1 is connected with the positive pole of power supply GB after connecting with the first resistance R 1, regulator potentiometer RP, the first base stage of the first junction transistors VT1 is connected with the positive pole of power supply GB afterwards with the second resistance R 2 series connection, be connected first capacitor C 1 of connecting between the emitter stage of the first junction transistors VT1 and the second base stage after 3 series connection of the second base stage of the first junction transistors VT1 and resistance R with the negative pole of power supply GB; The second resistance C2 connects between the base stage of the second base stage of the first junction transistors VT1 and the two the second unijunction transistor VT2.

Described the first resistance R 1 is 1K Ω, the first capacitor C 1 is 0.047UF, and regulator potentiometer RP is 51K Ω, and the first junction transistors VT1 is the BT33 transistor, the second resistance R 2 is 100 Ω, the 3rd resistance is 51 Ω, and the second electric capacity is 0.01UF, and the 4th resistance R 4 is 47K Ω, the 5th resistance R 5 is 3.3K Ω, the 3rd capacitor C 3 is 0.1UF, and the 6th resistance R 6 is 1K Ω, and the second unijunction transistor VT2 is 9018 transistors.

beneficial effect: electronic mosquito repellent of the present utility model is for can utilize PCB making sheet, because the simplification of circuit makes be extended the service life of electronic mosquito repellent, the internal adjustable potentiometer is regulated frequency of oscillation and amplitude, improved the sound wave output accuracy, the specific aim that the product that increases is used, higher compared with traditional chemical reagent mosquito repellent efficient, electronic component cost used is low in manufacturing process, it is element commonly used in Electronic Design, make to spend in whole manufacturing process and greatly reduce, due to output is small-signal, the power that consumes is low, can be battery-powered, service time is long, be easy to carry, simple to operate, environmentally safe, can not damage human body, also can not produce the mosquito corpse damages indoor environment, then can reclaim it service life, carry out the secondary utilization, make the utilization of raw material sustainability.

Description of drawings

The structure chart of Fig. 1 the utility model electronic mosquito repellent.

The schematic diagram of Fig. 2 the utility model electronic mosquito repellent.

Embodiment

The present invention is described in detail below in conjunction with drawings and Examples.

With reference to Fig. 1 and Fig. 2, in the present embodiment, the indicator lamp VD of described electronic mosquito repellent connects rear with the 6th resistance R 6 and power supply GB forms the loop; Electroceramics buzzing sheet BC connects rear with the 3rd capacitor C3, the 5th resistance R 5 and power supply GB forms the loop; The base stage of the second unijunction transistor VT2 is connected with the positive pole of power supply GB afterwards with the 4th resistance R 4 series connection, the emitter stage of the second unijunction transistor VT2 is connected with the negative pole of power supply GB, and the colelctor electrode of the second unijunction transistor VT2 is connected with the positive pole of power supply GB afterwards with the 5th resistance R 5 series connection; The emitter stage of the first unijunction transistor VT1 is connected with the positive pole of power supply GB after connecting with the first resistance R 1, regulator potentiometer RP, the first base stage of the first junction transistors VT1 is connected with the positive pole of power supply GB afterwards with the second resistance R 2 series connection, be connected first capacitor C 1 of connecting between the emitter stage of the first junction transistors VT1 and the second base stage after 3 series connection of the second base stage of the first junction transistors VT1 and resistance R with the negative pole of power supply GB; The second resistance C2 connects between the base stage of the second base stage of the first junction transistors VT1 and the two the second unijunction transistor VT2.

(1) adjustable potentiometer of described electronic mosquito repellent arranges respectively corresponding gear, respective frequencies value and output amplitude value, select suitable working frequency range and sound size (should guarantee that sound can not be heard by people's ear) by regulating it, power supply can use battery, also can access socket by the external voltage converter, concrete mode can be selected voluntarily, until mosquito expelling equipment can be prevented after indicator lamp is bright (should not too closely also should not be too far away till suitable at one's side, get final product in 1 ~ 2 meter), closing switch when stopping using.

(2) central principle of described electronic mosquito repellent application is to utilize internal noise to produce self-oscillation, be equivalent to a high frequency small-signal oscillator, it produces frequency up to the sinusoidal signal of 21 1 23kHz, drive ceramic generator and send ultrasonic, drive the female mosquitoes of cherishing ovum, the core component of oscillator is made of amplifier and feedback network, owing to being self-excited oscillator, its initial signal source and the closure of power supply and noise of inside circuit, amplify through the high-gain basic amplifier circuit that is consisted of by transistor, the load of amplifier is piezoelectric ceramic piece, its inside is quartz oscillator, be equivalent to resonant tank in parallel, have frequency-selecting and matching feature, consist of the base stage that the positive feedback network turns back to transistor, existence due to feedback network, the signal that makes oscillator produce finally is stabilized in fixing frequency and amplitude, we have also added adjustable potentiometer and have been used for concussion frequency and the amplitude of conditioning signal in circuit, it is operated on best mosquito repellent frequency.

(3) described electronic mosquito repellent is for can utilize PCB making sheet, higher compared with traditional chemical reagent mosquito repellent efficient, in manufacturing process, electronic component cost used is low, it is element commonly used in Electronic Design, make to spend in whole manufacturing process and greatly reduce, due to output is small-signal, the power that consumes is low, can be battery-powered, service time is long, be easy to carry, simple to operate, environmentally safe, can not damage human body, also can not produce the mosquito corpse damages indoor environment, then can reclaim it service life, carry out the secondary utilization, make the utilization of raw material sustainability.

with reference to Fig. 2, when closing power switch SW, light emitting diode lamp VD indicates working signal, the first unijunction transistor VT1 and the first resistance R l, regulator potentiometer RP and the first capacitor C 1 form a supersonic oscillations circuit, power supply GB is through the first resistance R l, regulator potentiometer RP is to the first capacitor C 1 charging, when charging reaches peak point voltage, the first unijunction transistor VT1 opens, and through the 3rd resistance R 3 discharges, when the voltage drop at the first capacitor C 1 two ends is following to peak dot, the first unijunction transistor VT1 cut-off, charging and discharging so repeatedly, produce vibration, regulator potentiometer RP can change frequency of oscillation, make it in 21-23kHz left and right, this oscillator signal is coupled to through the second capacitor C 2 amplifying circuit that the second unijunction transistor VT2 forms, signal after amplification is by the 3rd capacitor C 3 outputs, send ultrasonic for piezoelectric ceramics buzzing sheet BC, power supply through resistance to capacitor charging, when charging reaches peak point voltage, unijunction transistor is opened, and through conductive discharge, when the voltage drop at electric capacity two ends is following to peak dot, the unijunction transistor cut-off, charging and discharging so repeatedly, produce vibration, regulator potentiometer can change frequency of oscillation, make it in 21-23kHz left and right, this oscillator signal is capacitively coupled to through another amplifying circuit that triode forms, signal after amplification is exported by output coupling capacitor, send ultrasonic for piezoelectric ceramics buzzing sheet, wherein, the inner element used of piezoelectric ceramics buzzing sheet is quartz oscillator, it has very high standard parasexuality and high quality factor, therefore it has higher frequency stability, its physical property and chemical property are all very stable, its size is subjected to external condition such as temperature, the impact such as humidity is very little, thereby its equivalent high-frequency resonant tank capacitance and inductance value very stable.The connected factor of it and active device is very little, has greatly weakened the impact of destabilizing factor on its oscillatory system in the parameter such as interelectrode capacity of active device and external circuit; The second unijunction transistor VT2 consists of basic amplifier, circuit inner noise is amplified, its output loading (BC in figure, being equivalent to antiresonant circuit) base stage that feeds back to the second unijunction transistor VT2 consists of positive feedback, the gain amplifier of amplifier reduces with the rising of voltage simultaneously, and final output signal reaches stable state.

Above content is the further description of the present invention being done in conjunction with optimal technical scheme, can not assert that the concrete enforcement of invention only limits to these explanations.Concerning the general technical staff of the technical field of the invention, under the prerequisite that does not break away from design of the present invention, can also make simple deduction and replacement, all should be considered as protection scope of the present invention.

Claims

1. an electronic mosquito repellent, is characterized in that, the indicator lamp VD of described electronic mosquito repellent connects rear with the 6th resistance R 6 and power supply GB forms the loop; Electroceramics buzzing sheet BC connects rear with the 3rd capacitor C3, the 5th resistance R 5 and power supply GB forms the loop; The base stage of the second unijunction transistor VT2 is connected with the positive pole of power supply GB afterwards with the 4th resistance R 4 series connection, the emitter stage of the second unijunction transistor VT2 is connected with the negative pole of power supply GB, and the colelctor electrode of the second unijunction transistor VT2 is connected with the positive pole of power supply GB afterwards with the 5th resistance R 5 series connection; The emitter stage of the first unijunction transistor VT1 is connected with the positive pole of power supply GB after connecting with the first resistance R 1, regulator potentiometer RP, the first base stage of the first junction transistors VT1 is connected with the positive pole of power supply GB afterwards with the second resistance R 2 series connection, be connected first capacitor C 1 of connecting between the emitter stage of the first junction transistors VT1 and the second base stage after 3 series connection of the second base stage of the first junction transistors VT1 and resistance R with the negative pole of power supply GB; The second resistance C2 connects between the base stage of the second base stage of the first junction transistors VT1 and the two the second unijunction transistor VT2;