CN108109308A - A kind of low interference anti-theft alarm system - Google Patents
A kind of low interference anti-theft alarm system Download PDFInfo
- Publication number
- CN108109308A CN108109308A CN201711316462.4A CN201711316462A CN108109308A CN 108109308 A CN108109308 A CN 108109308A CN 201711316462 A CN201711316462 A CN 201711316462A CN 108109308 A CN108109308 A CN 108109308A
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- triode
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
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- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The present invention provides a kind of low interference anti-theft alarm system, by electrode A, touch switch circuit, polar capacitor C1, resistance R2, complementary type audio oscillator circuit, current rectifying and wave filtering circuit, transformer T and power switch K compositions；The Same Name of Ends of the transformer T secondary forms power input after power switch K together with its non-same polarity, and primary side is then connected with current rectifying and wave filtering circuit；The complementary type audio oscillator circuit is then connected with current rectifying and wave filtering circuit；Polar capacitor C1 and resistance R2 are in parallel, one common end is connected with touch switch circuit, another common end is then connected with complementary type audio oscillator circuit；The electrode A is then connected with touch switch circuit；It is characterized in that, the touch switch circuit is connected by anti-jamming circuit with complementary type audio oscillator circuit；Strong antijamming capability of the present invention influences from the interference signal of system itself, therefore can substantially reduce the situation of false alarm.
Description
Technical field
The present invention relates to a kind of alarm system, in particular to a kind of low interference anti-theft alarm systems.
Background technology
With the fast development of social progress and science and technology, people’s lives level is also constantly improving.Work as people
Out on tours or work when, property equipment of people etc. safely become its concern matter of utmost importance.For this problem, develop
A series of burglar alarm is gone out.Most common in early time is exactly to install protection network, but this traditional-family is antitheft
Warning device is more clumsy, once it is difficult escaping from window to have fire that people occur, while the net structure of the facility compares and is beneficial to
Climbing, hidden danger is brought to the household safe of unused protection network.Therefore, how preferably to protect the property safety of people is then mesh
Preceding institute's urgent problem.
The content of the invention
The defects of it is an object of the invention to overcome current anti-theft device that can not realize anti-theft feature well, provide one
The low interference anti-theft alarm system of kind.
The purpose of the present invention is achieved through the following technical solutions：A kind of low interference anti-theft alarm system, by electrode A, contact
On-off circuit, polar capacitor C1, resistance R2, complementary type audio oscillator circuit, current rectifying and wave filtering circuit, transformer T, anti-jamming circuit
And power switch K compositions；The Same Name of Ends of the transformer T secondary forms electricity after power switch K with together with its non-same polarity
Source input terminal, primary side are then connected with current rectifying and wave filtering circuit；The complementary type audio oscillator circuit then with current rectifying and wave filtering circuit
It is connected；Polar capacitor C1 and resistance R2 are in parallel, one common end is connected with touch switch circuit, another is common
End is then connected with complementary type audio oscillator circuit；The electrode A is then connected with touch switch circuit；The contact-making switch electricity
Road is connected by anti-jamming circuit with complementary type audio oscillator circuit.
Further, the anti-jamming circuit is by processing chip U, and N poles are connected with touch switch circuit, P poles are then through electricity
Hold the diode D1 being grounded after C2, the resistance R4 being in parallel with diode D1, anode is connected with the CVOLT pins of processing chip U
It connects, the capacitance C3 that cathode is then connected with touch switch circuit and one end are connected with the Q pin of processing chip U, the other end
The resistance R5 compositions being then connected with complementary type audio oscillator circuit；The R pins of the processing chip U are connected with its VCC pin
Connect, VCC pins then simultaneously be connected with touch switch circuit and current rectifying and wave filtering circuit, TRIG pins then with diode D1
P poles be connected, GND pins ground connection, THR pins are then connected with its TRIG pin, DIS pins then with complementary type audio
Oscillating circuit is connected.
The touch switch circuit includes triode VT1, triode VT2, triode VT3, resistance R1 and resistance R3；
The base stage of the triode VT1 is connected with electrode A, and base stage of the emitter then with triode VT2 is connected, and collector is then
It is connected with the VCC pins of processing chip U；The collector of the triode VT2 is connected with the collector of triode VT1,
Base stage of the emitter then with triode VT3 is connected；One end of the resistance R1 is connected with the collector of triode VT3,
The other end is then connected with the N poles of diode D1；One end of the resistance R3 is connected with the emitter of triode VT3, it is another
Cathode of the one end then with capacitance C3 is connected；The emitter of the triode VT3 is connected with the anode of polar capacitor C1, collection
Collector of the electrode then with triode VT1 is connected.
The complementary type audio oscillator circuit is by triode VT4, triode VT5, the base stage phase of anode and triode VT5
The capacitance C4 that connection, cathode are then connected with the base stage of triode VT4, emitter of the anode after alarm B with triode VT5
It is connected, the capacitance C5 compositions that cathode is then connected after resistance R6 with the base stage of triode VT4；The base of the triode VT4
Pole is connected after resistance R5 with the Q pin of processing chip U, its emitter is then connected with the cathode of polar capacitor C1, its collection
Emitter of the electrode then with triode VT5 is connected；The collector of the triode VT5 is connected with the collector of triode VT1
It connects；The base stage of the triode VT4 is also connected with the DIS pins of processing chip U.
The current rectifying and wave filtering circuit then includes diode D2, diode D3 and polar capacitor C6；The P of the diode D2
Pole is connected with the collector of triode VT5, Same Name of Ends of its N pole then with transformer T primary sides after diode D3 is connected；Institute
State that the anode of polar capacitor C6 is connected with the N poles of diode D2, emitter of its cathode then with triode VT4 is connected；Institute
The non-cathode of the same name with polar capacitor C6 for stating transformer T primary sides is connected.
The processing chip U is NE555 integrated chips.
The present invention compared with the prior art, has the following advantages and advantageous effect：
(1) present invention can send alarm automatically after thief touches electrode, its property safety of people is reminded to be subject to prestige
The side of body, enables people to timely make a response, avoids its property loss.
(2) present invention has the characteristics that low-power consumption, high stability, easy to install.
(3) strong antijamming capability of the present invention influences from the interference signal of system itself, therefore can substantially reduce mistake
The situation of alarm.
Description of the drawings
Fig. 1 is the overall structure figure of the present invention.
Specific embodiment
The present invention is described in further detail with reference to embodiment, but embodiments of the present invention are not limited to
This.
Embodiment
As shown in Figure 1, the low interference anti-theft alarm system of the present invention, by electrode A, touch switch circuit, polar capacitor C1,
Resistance R2, complementary type audio oscillator circuit, current rectifying and wave filtering circuit, transformer T, anti-jamming circuit and power switch K compositions
During connection, the anode of polar capacitor C1 is connected with touch switch circuit, its cathode then with complementary type audio oscillation
Circuit is connected；And resistance R2 is then in parallel with polar capacitor C1.The Same Name of Ends of the transformer T secondary is after power switch K
Power input is formed with together with its non-same polarity, which terminates 220V alternating currents, and the primary side of transformer T is then electric with rectifying and wave-filtering
Road is connected.220V alternating currents obtain the operating voltage of 20V after transformer T transformations, are used to provide work to entire alarm system
Make voltage.
In addition, the complementary type audio oscillator circuit is then connected with current rectifying and wave filtering circuit；The electrode A is then opened with contact
Powered-down road is connected, and anti-jamming circuit is then serially connected between touch switch circuit and complementary type audio oscillator circuit.The electrode A is pacified
Mounted in the place that thief easily touches, on window or need thing to be protected.
The touch switch circuit includes triode VT1, triode VT2, triode VT3, resistance R1 and resistance R3.
Connect into, the base stage of the triode VT1 is connected with electrode A, and base stage of the emitter then with triode VT2 is connected,
Collector is then connected with anti-jamming circuit.The collector of the triode VT2 is connected with the collector of triode VT1,
Base stage of the emitter then with triode VT3 is connected.One end of the resistance R1 is connected with the collector of triode VT3,
The other end is then connected with anti-jamming circuit.One end of the resistance R3 is connected with the emitter of triode VT3, its other end
Then it is connected with anti-jamming circuit；The emitter of the triode VT3 is connected with the anode of polar capacitor C1, and collector is then
It is connected with the collector of triode VT1.
The anti-jamming circuit is by processing chip U, and N poles are connected after resistance R1 with the collector of triode VT3, P poles
The diode D1 being then grounded after capacitance C2, the resistance R4 being in parallel with diode D1, the CVOLT of anode and processing chip U are managed
Foot is connected, cathode is then connected after resistance R3 with the emitter of triode VT3 capacitance C3 and one end and processing chip
The resistance R5 compositions that the Q pin of U is connected, the other end is then connected with complementary type audio oscillator circuit；The processing chip U's
R pins are connected with its VCC pin, and VCC pins are then connected with the collector and current rectifying and wave filtering circuit of triode VT1 simultaneously
Connect, TRIG pins are then connected with the P poles of diode D1, GND pins ground connection, THR pins then with its TRIG pin phase
Connection, DIS pins are then connected with complementary type audio oscillator circuit.The interference that the anti-jamming circuit can generate system itself
Signal is suppressed, and interference signal is avoided to impact the present invention.In order to reach better implementation result, the processing core
Piece U is preferably NE555 integrated chips to realize.
The complementary type audio oscillator circuit is by triode VT4, triode VT5, the base stage phase of anode and triode VT5
The capacitance C4 that connection, cathode are then connected with the base stage of triode VT4, emitter of the anode after alarm B with triode VT5
It is connected, the capacitance C5 compositions that cathode is then connected after resistance R6 with the base stage of triode VT4；The base of the triode VT4
Pole is connected after resistance R5 with the Q pin of processing chip U, its emitter is then connected with the cathode of polar capacitor C1, its collection
Emitter of the electrode then with triode VT5 is connected；The collector of the triode VT5 is connected with the collector of triode VT1
It connects；The base stage of the triode VT4 is also connected with the DIS pins of processing chip U.
The current rectifying and wave filtering circuit is used to carry out rectifying and wave-filtering processing to the operating voltage after transformation, including diode
D2, diode D3 and polar capacitor C6.During connection, the P poles of the diode D2 are connected with the collector of triode VT5,
Same Name of Ends of its N pole then with transformer T primary sides after diode D3 is connected.The anode of the polar capacitor C6 and diode D2
N poles be connected, emitter of its cathode then with triode VT4 is connected；The non-of the same name and polarity electricity of the transformer T primary sides
The cathode for holding C6 is connected.
When pressing power switch K since triode VT1 base stages are hanging, which is in cut-off state, this
When triode VT4 and triode VT5 stop oscillation, alarm B does not work.When someone touches electrode A, due to human body sensing
Faint alternating current play triode VT4 and triode VT5 after triode VT1, triode VT2 and triode VT3 amplification
It shakes, alarm B alarms.Polar capacitor C1 charges rapidly simultaneously, even if at this moment human body stops touching electrode A, polar capacitor C1
Electric current can be provided to triode VT4 and triode VT5, so alarm B still alarms, can just stopped about after 5S, so then
Alarm can be provided to people.
As described above, the present invention can be implemented well.
Claims (5)
1. a kind of low interference anti-theft alarm system, by electrode A, touch switch circuit, polar capacitor C1, resistance R2, complementary type sound
Frequency oscillator circuit, current rectifying and wave filtering circuit, transformer T and power switch K compositions；The Same Name of Ends of the transformer T secondary is through electricity
Power input is formed after source switch K together with its non-same polarity, primary side is then connected with current rectifying and wave filtering circuit；The complementation
Type audio oscillator circuit is then connected with current rectifying and wave filtering circuit；Polar capacitor C1 and resistance R2 are in parallel, one common end with
Touch switch circuit is connected, another common end is then connected with complementary type audio oscillator circuit；The electrode A is then with connecing
Tactile on-off circuit is connected；It is characterized in that, the touch switch circuit passes through anti-jamming circuit and complementary type audio oscillation electricity
Road is connected；The anti-jamming circuit is by processing chip U, and N poles are connected with touch switch circuit, P poles are then followed by through capacitance C2
The diode D1 on ground, the resistance R4 being in parallel with diode D1, anode is connected with the CVOLT pins of processing chip U, cathode then
The capacitance C3 and one end being connected with touch switch circuit are connected with the Q pin of processing chip U, the other end then with complementation
The resistance R5 compositions that type audio oscillator circuit is connected；The R pins of the processing chip U are connected with its VCC pin, VCC
Pin is then connected with touch switch circuit and current rectifying and wave filtering circuit simultaneously, the TRIG pins then P poles phase with diode D1
Connection, GND pins ground connection, THR pins are then connected with its TRIG pin, and DIS pins are then electric with complementary type audio oscillation
Road is connected.
2. a kind of low interference anti-theft alarm system according to claim 1, it is characterised in that：The touch switch circuit
Including triode VT1, triode VT2, triode VT3, resistance R1 and resistance R3；The base stage and electrode A of the triode VT1
It is connected, base stage of the emitter then with triode VT2 is connected, and collector is then connected with the VCC pins of processing chip U
It connects；The collector of the triode VT2 is connected with the collector of triode VT1, the emitter then base stage with triode VT3
It is connected；One end of the resistance R1 is connected with the collector of triode VT3, the other end then N poles phase with diode D1
Connection；One end of the resistance R3 is connected with the emitter of triode VT3, cathode of its other end then with capacitance C3 is connected
It connects；The emitter of the triode VT3 is connected with the anode of polar capacitor C1, the collector then current collection with triode VT1
Pole is connected.
3. a kind of low interference anti-theft alarm system according to claim 2, it is characterised in that：The complementary type audio is shaken
Circuit is swung by triode VT4, triode VT5, and anode is connected with the base stage of triode VT5, the cathode then base with triode VT4
The capacitance C4 that pole is connected, anode is connected after alarm B with the emitter of triode VT5, cathode then after resistance R6 with
The capacitance C5 compositions that the base stage of triode VT4 is connected；Q of the base stage of the triode VT4 after resistance R5 with processing chip U
Pin is connected, its emitter is then connected with the cathode of polar capacitor C1, its collector then emitter phase with triode VT5
Connection；The collector of the triode VT5 is connected with the collector of triode VT1；The base stage of the triode VT4 also with place
The DIS pins of reason chip U are connected.
4. a kind of low interference anti-theft alarm system according to claim 3, it is characterised in that：The current rectifying and wave filtering circuit is then
Including diode D2, diode D3 and polar capacitor C6；The P poles of the diode D2 are connected with the collector of triode VT5
It connects, Same Name of Ends of its N pole then with transformer T primary sides after diode D3 is connected；The anode of the polar capacitor C6 and two poles
The N poles of pipe D2 are connected, emitter of its cathode then with triode VT4 is connected；The non-of the same name and pole of the transformer T primary sides
The cathode of property capacitance C6 is connected.
5. according to a kind of low interference anti-theft alarm system of Claims 1 to 4 any one of them, it is characterised in that：The place
It is NE555 integrated chips to manage chip U.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711316462.4A CN108109308A (en) | 2017-12-12 | 2017-12-12 | A kind of low interference anti-theft alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711316462.4A CN108109308A (en) | 2017-12-12 | 2017-12-12 | A kind of low interference anti-theft alarm system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108109308A true CN108109308A (en) | 2018-06-01 |
Family
ID=62215564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711316462.4A Pending CN108109308A (en) | 2017-12-12 | 2017-12-12 | A kind of low interference anti-theft alarm system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108109308A (en) |
-
2017
- 2017-12-12 CN CN201711316462.4A patent/CN108109308A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180601 |