CN2158115Y

CN2158115Y - Multi-purpose alarming device

Info

Publication number: CN2158115Y
Application number: CN 93218603
Authority: CN
Inventors: 许凡
Original assignee: LOW-VOLTAGE ELECTRIC APPLIANCE FACTORY KUNMING
Current assignee: LOW-VOLTAGE ELECTRIC APPLIANCE FACTORY KUNMING
Priority date: 1993-07-10
Filing date: 1993-07-10
Publication date: 1994-03-02
Anticipated expiration: 2003-07-10

Abstract

The utility model provides an electronic multi-purpose alarming device, which is composed of a plastic outer casing 2 provided with a sound help box 3 and a battery box 6, a circuit board comprising an electrical source voltage stabilizing circuit, a high-frequency oscillation circuit, a detecting circuit, a direct current amplification circuit, a delay time negative feedback circuit, an electronic switch circuit, an audio oscillation circuit, and a sound-light display circuit which is arranged in the plastic outer casing, and a metal chain 1. Using the principle of the human body induction, the alarm is realized when human body approaching, the distance of the induction can reach 5 to 12 cm. The whole circuit fundamentally needs not to debug, and has high stability. The utility model can conveniently complete the quick connection with the inductors with various and different sizes and shapes, and is suitable for multiple occasions of the family life, the business trip, and the travel.

Description

Multi-purpose alarming device

The utility model relates to a kind of multi-usage and guards against device, and it utilizes the human body sensing principle to realize the distance warning, is applicable to anti-intrusion, antitheft, myopia prevention, anti-near multiple occasions such as (dangerous parts).

Existing induction type warning device generally constitutes sensor circuit by capacitance connecting three point type oscillator, all needs carefully to adjust repeatedly the bias voltage of oscillating tube after the assembling, in the hope of obtaining suitable oscillation intensity, makes circuit can possess certain sensitivity and stability simultaneously.This adjustment is extremely time-consuming, and, even the circuit of having adjusted, it also very easily is subjected to supply voltage, factors such as environment temperature are disturbed and are caused stability or sensitivity to descend, and particularly it can only fix with the inductor of pre-sizing and connect, and the inductor size is in case change, must readjust bias voltage could work, and this has just limited the possibility that it uses in multiple occasion again.

The purpose of this utility model aim to provide a kind of convenience, many with, have higher stability and sensitivity, and not disturbed by factor such as environment, the multi-usage that suitable batch production is produced in batches is guarded against device.

For achieving the above object, the utility model adopts following technical proposals: the warning device has by one and helps box 3, the plastic casing 2 of battery case 6 and install within it comprise the power supply voltage stabilizing, the higher-order of oscillation, detection, direct current amplifies, the time-delay negative feedback, electronic switch, the circuit board of audio oscillation and sound and light show circuit and metallic bond 1 are formed, high-frequency oscillating circuits is by triode V1, capacitor C 1, inductance L is formed, its connection is: the base stage of triode V1, one end of capacitor C 1, one end of inductance L and resistance R 1, the end of R4 and inductor G link to each other, the emitter-base bandgap grading of triode V1, one end of the other end of capacitor C 1 and capacitor C 3, one end of resistance R 2 links to each other, the collector of triode V1 links to each other with positive source after the voltage stabilizing, and the other end of inductance L links to each other with an end of capacitor C 2; Detecting circuit is made up of triode V2, diode V7, capacitor C 4, its connection is: the negative electrode of the base stage of triode V2, diode V7 links to each other with the other end of capacitor C 3, one end of the collector of triode V2, capacitor C 4 is connected with an end of resistance R 3, the other end of R5, another termination power cathode of the anode of the emitter-base bandgap grading of triode V2, diode V7, capacitor C 4; Dc amplification circuit is made up of not gate F6, resistance R 6, R5, its connection is: the output terminal of not gate F6 links to each other with the end of resistance R 6, R5, the output terminal of not gate F6, resistance R 6 other ends link to each other with an end of resistance R 7, the end of R9, the anode of diode V8, an end of capacitor C 7, and the other end of resistance R 5 links to each other with the collector of triode V2, an end of capacitor C 4, an end of resistance R 3; The time-delay negative-feedback circuit is made up of not gate F5, capacitor C 5, resistance R 7, R8, diode V8, its connection is: the positive pole of not gate F5 input termination capacitor C 5 and an end of resistance R 8, the negative pole of the output termination capacitor C 5 of not gate F5 and the other end of resistance R 4, the other end of resistance R 8 links to each other with the other end of resistance R 7, the negative electrode of diode V8, and the end of the output terminal of the anode Sheffer stroke gate F6 of an end of resistance R 7, diode V8, resistance R 6 other ends, R9, an end of capacitor C 7 link to each other; The warning device is a metallic bond 1 with connecting of inductor G, and metallic bond 1 is welded on the circuit board, with the base stage of triode V1, and an end of inductance L, the continuous assembling of the end of an end of capacitor C 1, resistance R 1, R4 back passes from shell 2, forms a closed hoop.The box face is equipped with sound and light display spare.Metallic bond 1 is drawn in shell 2, serves as the lead that the warning device connects with outside inductor G, and metallic bond 1 is hung on the inductor G, has promptly finished both connections.High-frequency oscillating circuits is made of the capacitance connecting three point type oscillator of distortion, its output is through detection, after directly putting, through the time-delay negative-feedback circuit bias voltage of higher-order of oscillation pipe is carried out negative feedback again, so that the high frequency amplitude does not change because of component parameters error, external environment condition and inductor are big or small, circuit can just have advantages of higher stability and sensitivity under situation about must not adjust.The warning device has utilized one 4069 integrated circuit dexterously, and its six not gates are used as direct current amplification, negative feedback, audio oscillation, ultra-low frequency oscillation respectively, thereby circuit is greatly simplified, and seems compact, has reduced cost.

Compared with the prior art, the utility model has some obvious advantages like this: circuit is simple, and cost is low; Circuit need not adjusted, suitable batch production production; Volume is small and exquisite, need not install, and is convenient for carrying; The inductor size does not have influence to stability and sensitivity basically, can realize multiple use; Good stability, highly sensitive, distance of reaction can reach 5-12cm, the properties of product high conformity.

Fig. 1 is an outside drawing of the present utility model.Fig. 2 is a human body sensing block diagram of the present utility model.Fig. 3 is an electrical schematic diagram of the present utility model.

The utility model is further described by embodiment below in conjunction with accompanying drawing.

Among Fig. 1, shell 2 is that ABS plastic is injection molded.1 is metallic bond, is welded on the circuit board after two ends close up.Metallic bond 1 has been actually the effect of connecting conducting wire, and requiring has excellent conducting performance and lower contact resistance, has certain flexibility simultaneously, and what this example was used is 2mm eel bone chain.Microphone device adopts piezoelectric ceramic piece, and it is bonded in and helps on the box 3.5 is LED.6 is battery case, and 4 is power switch.In the shell 2 circuit board is housed.Electrical schematic diagram as shown in Figure 3, approaching warning is achieved in that V1, C1, L have formed the electric capacity point type oscillator of distortion to human body for it, when switch 4 connections there is no human body near inductor G, the oscillator starting of oscillation, the high-frequency sasser of output is after C3 coupling V2V7 detection and C4 filtering, and the amplifier of being made up of F6 and R5, R6 carries out the anti-phase amplification of direct current (enlargement factor Av=-R6/R5).The span of R5 is 8-10K Ω.The span of R6 is 8-10M Ω.It exports one road base stage of delivering to V3, the V3 conducting, audio oscillation is failure of oscillation partly, the negative-feedback circuit that another road is formed via F5, C5, R8, R7, V8, formation is to the negative feedback (the negative-feedback circuit principle of work is stated in addition) of V1 bias voltage, when human body during near the anti-body G of induction, because body capacity effect, the high frequency amplitude weakens even failure of oscillation, and F6 output weakens, and V3 ends, the audio oscillator circuit starting of oscillation of forming by F1-F4 and peripheral cell thereof, behind V6, V5 amplification and T liter, promote piezoelectric patches and send sharp-pointed rapid chimes of doom, the luminotron while is glittering.

See Fig. 2,3, the principle of work of V1 bias voltage negative-feedback circuit is such: after the V1 starting of oscillation, suppose that for a certain reason make amplitude diminish (this moment, circuit stability descended), this signal is through detection, after the amplification, the output of F6 has the trend of reduction, thereby the input current potential of F5 also has the trend of reduction, and the output potential of F5 will be elevated, just improved the bias voltage of V1, thereby vibration is enhanced.In like manner, when for a certain reason, the V1 amplitude becomes big (this moment, circuit sensitivity descended), because the effect of feedback circuit, the bias voltage of V1 will reduce, thereby keeps amplitude constant substantially.This negative feedback process, see from Fig. 2 to be exactly: Gao Zhenqiang, it is high directly to put output, and negative feedback output is low, and Gao Zhen weakens.In like manner, a little less than height shook, it was low directly to put output, and negative feedback output is high, the height enhancing of shaking.Be not difficult to find out, not gate F5, F6 is because the effect of feedback resistance R6 and whole negative feedback loop is to be operated in linear part in this example in fact, from voltage-transfer characteristic curve, they are to be operated in the oblique line section.F5, F6 are two not gates in 4069 integrated circuit in this example.

Above said certain reason, be meant component parameters, the size of inductor own etc., the parameter that no longer changes after circuit is connected, or the physical quantitys that extremely slowly change such as picture supply voltage, environment temperature.And cause the change of V1 amplitude during suddenly near inductor G for human body, because the effect (the electric capacity both end voltage can not be suddenlyd change) of C5, bias voltage can flip-flop, at this moment, and the voicefrequency circuit starting of oscillation, yet, even human body does not change near the distance of inductor G, through after the several seconds, C5 is by R8, R7 discharge, feedback circuit can make high frequency balance again, audio frequency failure of oscillation.Another effect of C5 is to form the start time-delay.During start, because the effect of C5, the input end current potential of F5 is lower, and its output potential is higher, and height shakes stronger, at this moment, even human body near inductor G, can not trigger warning yet.Through after a while, the output of F6 is charged to C5 through V8, R8, and the input end current potential of F5 is increased gradually, the corresponding step-down of its output terminal current potential, and circuit enters the state of alert.Here mainly by the output voltage decision of F5, so the ratio of R4 and R1 is suitable little, the R1 value is 1M Ω to the bias voltage of V1 in this example, and the R4 value is 22K Ω.The value size of C5 can influence between time-delay and trigger time of fire alarming, and its span is 22-47 μ F, these routine value 33 μ F, and delay time is about half a minute.

In sum, be not difficult to find out, because the effect of time-delay negative-feedback circuit can be eliminated preset parameter and slowly change physical quantity to the V1 effect on amplitude.But, then can in time reflect near such sudden change amount for human body, this has obtained unified preferably with regard to the contradiction that makes warning device stability and sensitivity.

Claims

1, a kind of by one have the plastic casing 2 that helps box 3, battery case 6 and install within it comprise the power supply voltage stabilizing, the multi-usage warning device that the circuit board of the higher-order of oscillation, detection, direct current amplification, time-delay negative feedback, electronic switch, audio oscillation, sound and light show circuit and metallic bond 1 are formed is characterized in that:

(a) high-frequency oscillating circuits is made up of triode V1, capacitor C 1, inductance L, its connection is: an end of the base stage of triode V1, capacitor C 1, an end of inductance L link to each other with an end and the inductor G of resistance R 1, R4, the other end of the emitter-base bandgap grading of triode V1, capacitor C 1 links to each other with an end of capacitor C 3, an end of resistance R 2, the collector of triode V1 links to each other with positive source after the voltage stabilizing, and the other end of inductance L links to each other with an end of capacitor C 2;

(b) detecting circuit is made up of triode V2, diode V7, capacitor C 4, its connection is: the negative electrode of the base stage of triode V2, diode V7 links to each other with the other end of capacitor C 3, one end of the collector of triode V2, capacitor C 4 is connected with an end of resistance R 3, the other end of R5, another termination power cathode of the anode of the emitter-base bandgap grading of triode V2, diode V7, capacitor C 4;

(c) dc amplification circuit is made up of not gate F6, resistance R 6, R5, its connection is: the output terminal of not gate F6 links to each other with the end of resistance R 6, R5, the output terminal of not gate F6, resistance R 6 other ends link to each other with an end of resistance R 7, the end of R9, the anode of diode V8, an end of capacitor C 7, and the other end of resistance R 5 links to each other with the collector of triode V2, an end of capacitor C 4, an end of resistance R 3;

(d) the time-delay negative-feedback circuit is made up of not gate F5, capacitor C 5, resistance R 7, R8, diode V8, its connection is: the positive pole of not gate F5 input termination capacitor C 5 and an end of resistance R 8, the negative pole of the output termination capacitor C 5 of not gate F5 and the other end of resistance R 4, the other end of resistance R 8 links to each other with the other end of resistance R 7, the negative electrode of diode V8, and the end of the output terminal of the anode Sheffer stroke gate F6 of an end of resistance R 7, diode V8, resistance R 6 other ends, R9, an end of capacitor C 7 link to each other;

(e) the warning device is a metallic bond 1 with connecting of inductor G, and metallic bond 1 is welded on the circuit board, with the base stage of triode V1, and an end of inductance L, the continuous assembling of the end of an end of capacitor C 1, resistance R 1, R4 back passes from shell 2, forms a closed hoop.

2, by the described multi-usage warning of claim 1 device, it is characterized in that F5, F6 are two not gates in 4069 integrated circuit.

3, by the described multi-usage warning of claim 1 device, it is characterized in that resistance R 5 spans are 8-10K Ω.

4, by the described multi-usage warning of claim 1 device, it is characterized in that resistance R 6 spans are 8-10M Ω.

5, by the described multi-usage warning of claim 1 device, it is characterized in that capacitor C 5 spans are 22-47 μ F.