CN103679999A

CN103679999A - Anti-theft alarming device capable of moving with article

Info

Publication number: CN103679999A
Application number: CN201410001285.0A
Authority: CN
Inventors: 黄宇嵩
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-01-02
Filing date: 2014-01-02
Publication date: 2014-03-26

Abstract

The invention relates to an anti-theft alarming device capable of moving with an article. The anti-theft alarming device is characterized by comprising a 4.5V direct-current power supply, a moveable sensor, a unidirectional thyristor control circuit, a positive feedback oscillating circuit and a loudspeaker YS, wherein the moveable sensor and the unidirectional thyristor control circuit consist of mercury switches (1), unidirectional thyristors SCR and resistors R1; the positive feedback oscillating circuit consists of a resistor R2, an NPN type transistor VT1, a resistor R3, a PNP type transistor VT2, a capacitor C1, a resistor R4 and a loudspeaker YS. Nearly all the anti-theft devices in the market are fixed for use. The anti-theft alarming device capable of moving with the article, disclosed by the invention, can be fixedly arranged at a proper position of an anti-theft move-preventing device in use, such as a motorcar or a bicycle, a precious article and a cultural relic in a museum. When the article is moved, the alarming device gives sound, so that the aims of threatening uninvited guests and causing the attention of a person on duty are fulfilled.

Description

Can move burglar alarm with article

Technical field

The invention belongs to electronics and technical field of security and protection, is can move burglar alarm with article about a kind of.

Background technology

On market, nearly all anti-theft device is all that fixed placement is used, and generally it can not move and install with article, and this is subject to certain limitation in actual use.In order to overcome the defect that on market, existing burglar alarm exists, develop a kind of can be along with the burglar alarm that article move is necessary.Of the present inventionly can move burglar alarm with article, in use, it can be placed in to antitheft anti-animal part, as: the appropriate location of the objects such as motorcycle or bicycle, valuables, cultural relics in the collection of cultural institution.When object one is moved, warning device can be sounded at once.Thereby the object that reaches threatening uninvited guest and remind operator on duty to note.

Can move with article that simple, the used number of elements of circuit structure of burglar alarm is few, highly sensitive, reliable operation, easy to install, cost of manufacture only needs several units, is well suited for factory and develops in batches.

Below describe in detail and of the present inventionly can move burglar alarm related relevant technologies content in implementation process with article.

Summary of the invention

Goal of the invention and beneficial effect: on market, nearly all anti-theft device is all that fixed placement is used, and generally it can not move and install with article, and this is subject to certain limitation in actual use.In order to overcome the defect that on market, existing burglar alarm exists, develop a kind of can be along with the burglar alarm that article move is necessary.Of the present inventionly can move burglar alarm with article, in use, it can be placed in to antitheft anti-animal part, as: the appropriate location of the objects such as motorcycle or bicycle, valuables, cultural relics in the collection of cultural institution.When object one is moved, warning device can be sounded at once.Thereby the object that reaches threatening uninvited guest and remind operator on duty to note.

Circuit working principle: can move burglar alarm by movable sensor with article, that is: mercury cut-off (1), unidirectional controllable silicon S CR, sound generating circuit and loudspeaker YS form.When circuit is connected after 4.5V direct supply, mercury cut-off (1) is inclined relative to horizontal line 20 degree established angles, without sound in the situation that, the contact of mercury cut-off (1) is off-state, and the trigger current of unidirectional controllable silicon S CR is zero, and unidirectional controllable silicon S CR is blocking state, at this moment 4.5V DC power supply circuit is equivalent to open circuit, sound generating circuit is not worked without electricity, loudspeaker YS voiceless sound, and complete machine power consumption is zero substantially.

Once warning device is moved, or move article and cause that mercury cut-off (1) pitch angle changes, to cause mercury cut-off (1) contacting, the control utmost point of unidirectional controllable silicon S CR obtains trigger current and conducting by resistance R 1, sound generating circuit obtains electric starting working, and drives loudspeaker YS to send continuously " beep ... " chimes of doom.

NPN transistor VT1, PNP transistor VT2 are two opposite polarity transistors, the emitter junction of PNP transistor VT2 is the load of NPN transistor VT1, and NPN transistor VT1 provides base current for PNP transistor VT2, their work of working in coordination, under the positive feedback effect of capacitor C 1, resistance R 4, form positive feedback oscillatory circuit, that is: sound generating circuit.

The frequency of operation of positive feedback oscillatory circuit depends primarily on time constant T, and T=R2 * C1, therefore increase and decrease resistance R 2 resistances or capacitor C 1 capacity can change the tone of loudspeaker YS sounding.

Technical scheme: can move burglar alarm with article, it comprises 4.5V direct supply, movable sensor and one-way SCR control circuit, positive feedback oscillatory circuit and loudspeaker YS, it is characterized in that:

Movable sensor and one-way SCR control circuit: it is comprised of mercury cut-off (1), unidirectional controllable silicon S CR and resistance R 1, one end order of mercury cut-off (1) is to the control utmost point of controllable silicon SCR, the other end of mercury cut-off (1) passes through resistance R 1 order to the anode of controllable silicon SCR and the positive pole of 4.5V direct supply, the anodal VCC of the negative electrode connection circuit of unidirectional controllable silicon S CR;

Positive feedback oscillatory circuit: it is by resistance R 2, NPN transistor VT1, resistance R 3, PNP transistor VT2, capacitor C 1 and resistance R 4 and loudspeaker YS form, one end of base stage connecting resistance R2 of NPN transistor VT1 and one end of capacitor C 1, the anodal VCC of other end connection circuit of resistance R 2, the other end of capacitor C 1 connects the collector of PNP transistor VT2 by resistance R 4, the collector of NPN transistor VT1 connects one end of base stage and the resistance R 3 of PNP transistor VT2, the anodal VCC of other end connection circuit of resistance R 3, the emitter connection circuit ground GND of NPN transistor VT1, the anodal VCC of emitter connection circuit of PNP transistor VT2, the collector of PNP transistor VT2 is by loudspeaker YS connection circuit ground GND, 4.5V DC power cathode is connected with circuit ground GND.

Accompanying drawing explanation

Accompanying drawing 1 is provided by the inventionly can move embodiment circuit working schematic diagram of burglar alarm with article; " 1 " on accompanying drawing 1 represents mercury cut-off.

Embodiment

According to moving anti-theft warning device circuit fundamental diagram and accompanying drawing explanation with article shown in accompanying drawing 1, and according to annexation between components and parts in the each several part circuit described in summary of the invention, and the components and parts technical parameter described in embodiment requires and circuit production main points are implemented to realize the present invention, below in conjunction with embodiment, correlation technique of the present invention is further described.

The selection of components and parts and technical parameter thereof

Element number	Components and parts title	Model or technical indicator	Quantity	Remarks
						1	Mercury cut-off	￠ 3.5mm, select 237 types	1	Movable sensor
SCR	One-way SCR	MCR100-6	1	Require 1A/50V
					VT1	NPN transistor	2SC9013、β≥180	1	?
VT2	PNP transistor	2SC9015、β≥160	1	?
					R1	Metalfilmresistor	1/8W、12KΩ	1	?
R2	Metalfilmresistor	1/8W、47KΩ	1	Be used for regulating tone
					R3	Metalfilmresistor	1/8W、8.2KΩ	1	?
R4	Metalfilmresistor		1/8W、1.8KΩ	1						Positive feedback effect
					C1	Electric capacity	0.047μF/40V	1	Positive feedback effect
YS	D.sp.	8Ω、0.5W	1	?
					DC	4.5V direct supply	No. 5 MnZn dry cells	3 joints	?

Circuit production main points, circuit debugging and using method

Fairly simple because moving the circuit structure of burglar alarm with article, as long as the electronic devices and components performance of generally selecting is intact, and the components and parts annexation in accompanying drawing 1 is welded to specifications, physical connection line and welding quality are after careful inspection is correct, and circuit of the present invention does not substantially need to carry out any debugging and can normally work;

Circuit debugging: if loudspeaker YS tone of sound is too overcast or point too, can be by suitably reducing or increasing resistance R 2 resistances or capacitor C 1 capacity is regulated;

If the volume of sensation loudspeaker YS is inadequate, can suitably increase the resistance of resistance R 4; But the resistance of resistance R 4 can not be too large, otherwise power consumption during circuit working can obviously increase, and makes circuit starting of oscillation difficulty.

Claims

1. can move a burglar alarm with article, it comprises 4.5V direct supply, movable sensor and one-way SCR control circuit, positive feedback oscillatory circuit and loudspeaker YS, it is characterized in that:

Described movable sensor and one-way SCR control circuit are comprised of mercury cut-off (1), unidirectional controllable silicon S CR and resistance R 1, one end order of mercury cut-off (1) is to the control utmost point of controllable silicon SCR, the other end of mercury cut-off (1) passes through resistance R 1 order to the anode of controllable silicon SCR and the positive pole of 4.5V direct supply, the anodal VCC of the negative electrode connection circuit of unidirectional controllable silicon S CR;

Described positive feedback oscillatory circuit is by resistance R 2, NPN transistor VT1, resistance R 3, PNP transistor VT2, capacitor C 1 and resistance R 4 and loudspeaker YS form, one end of base stage connecting resistance R2 of NPN transistor VT1 and one end of capacitor C 1, the anodal VCC of other end connection circuit of resistance R 2, the other end of capacitor C 1 connects the collector of PNP transistor VT2 by resistance R 4, the collector of NPN transistor VT1 connects one end of base stage and the resistance R 3 of PNP transistor VT2, the anodal VCC of other end connection circuit of resistance R 3, the emitter connection circuit ground GND of NPN transistor VT1, the anodal VCC of emitter connection circuit of PNP transistor VT2, the collector of PNP transistor VT2 is by loudspeaker YS connection circuit ground GND, 4.5V DC power cathode is connected with circuit ground GND.