CN104978818A - Burglar alarm - Google Patents
Burglar alarm Download PDFInfo
- Publication number
- CN104978818A CN104978818A CN201410134428.5A CN201410134428A CN104978818A CN 104978818 A CN104978818 A CN 104978818A CN 201410134428 A CN201410134428 A CN 201410134428A CN 104978818 A CN104978818 A CN 104978818A
- Authority
- CN
- China
- Prior art keywords
- mentioned
- burglar alarm
- transmitting coil
- oscillating circuits
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention discloses a burglar alarm, comprising a signal emitter and a signal receiver. The signal emitter comprises a high-frequency oscillating circuit and a transmitting coil. The signal receiver comprises an induction receiving coil, a rectification circuit, an audio frequency oscillator and a loudspeaker. The signal emitter is fixed nearby a side, close to a door rotating shaft, of a doorframe. The signal receiver is fixed on a door rotating shaft which is directly facing the transmitting coil. According to the invention, the transmitting coil and the induction receiving coil are required to be opposite to each other and closest to each other when a door is closed. When someone opens the door by force, the loudspeaker gives an alarm.
Description
Technical field
The present invention relates to a kind of burglar alarm.
Background technology
Existing alarm technology is when there being people to force open the door, and alarm can be reported to the police, and robber just makes alarm close after door is shut, and the video alarm high cost difficulty also had is promoted.
Summary of the invention
The object of this invention is to provide a kind of burglar alarm, can solve the problem.
The object of the invention is to be achieved through the following technical solutions:
A kind of burglar alarm, comprise: signal projector and signal receiver, above-mentioned signal projector contains high-frequency oscillating circuits and transmitting coil, above-mentioned signal receiver comprises induction receiving coil, rectification circuit, audio frequency oscillator, loudspeaker, above-mentioned signal projector is fixed on the side of doorframe near door pivot, and above-mentioned signal receiver is fixed on the door pivot just right with transmitting coil.
Above-mentioned a kind of burglar alarm designs further and is: above-mentioned high-frequency oscillating circuits is the high-frequency oscillating circuits be made up of 555 integrated circuit, above-mentioned oscillation frequency 50KHz, above-mentioned high-frequency oscillating circuits is connected with 12V direct current, and above-mentioned high-frequency oscillating circuits and transmitting coil realize electricity and be connected.
Above-mentioned a kind of burglar alarm designs further and is: induction receiving coil realizes being electrically connected with rectification circuit, audio frequency oscillator, loudspeaker successively, and above-mentioned audio oscillator circuit is the audio oscillator circuit be made up of 555 integrated circuit, oscillation frequency 10KHz.
Above-mentioned a kind of burglar alarm designs further and is: above-mentioned induction receiving coil and transmitting coil near time produce induced voltage, the DC voltage that induced voltage produces through rectifier circuit rectifies is audio frequency oscillator, loudspeaker provides operating voltage.
Usefulness cost of the present invention is low, practical.
Accompanying drawing explanation
With reference to the accompanying drawings the present invention is described in further detail below.
Fig. 1 is that the transmitting coil of a kind of burglar alarm described in the embodiment of the present invention and induction receiving coil place schematic diagram:
Accompanying drawing 1 marks implication: 1, signal projector, and 2, signal receiver, 3, high-frequency oscillating circuits, 4, transmitting coil, 5, induction receiving coil, 6, rectification circuit, 7, audio frequency oscillator, 8, loudspeaker.
Embodiment
The present invention is specifically introduced as follows below in conjunction with drawings and Examples:
As a kind of burglar alarm of decision design, comprise: signal projector 1 and signal receiver 2, signal projector 1 is containing high-frequency oscillating circuits 3 and transmitting coil 4, signal receiver 2 comprises induction receiving coil 5, rectification circuit 6, audio frequency oscillator 7, loudspeaker 8, signal projector 1 is fixed on the side of doorframe near door pivot, and signal receiver 2 is fixed on the door pivot just right with transmitting coil 4.
Also as decision design, a kind of burglar alarm: above-mentioned high-frequency oscillating circuits 3 is the high-frequency oscillating circuitss 3 be made up of 555 integrated circuit, above-mentioned oscillation frequency 50KHz, above-mentioned high-frequency oscillating circuits 3 is connected with 12V direct current, and above-mentioned high-frequency oscillating circuits 3 and transmitting coil 4 realize electricity and be connected.
Also as decision design, a kind of burglar alarm: induction receiving coil 5 realizes being electrically connected with rectification circuit 6, audio frequency oscillator 7, loudspeaker 8 successively, and above-mentioned audio oscillator circuit is the audio oscillator circuit be made up of 555 integrated circuit, oscillation frequency 10KHz.
Above-mentioned induction receiving coil 5 and transmitting coil 4 near time produce induced voltage, the DC voltage that induced voltage produces through rectification circuit 6 rectification is audio frequency oscillator 7, loudspeaker 8 provides operating voltage.
It should be noted that induction receiving coil 5 produces induced electricity, and audio oscillator circuit 7 works, loudspeaker 8 sounding alarm when having people to make a forcible entry into open.
Claims (4)
1. a burglar alarm, it is characterized in that, comprise: signal projector and signal receiver, above-mentioned signal projector contains high-frequency oscillating circuits and transmitting coil, above-mentioned signal receiver comprises induction receiving coil, rectification circuit, audio frequency oscillator, loudspeaker, above-mentioned signal projector is fixed on the side of doorframe near door pivot, and above-mentioned signal receiver is fixed on the door pivot just right with transmitting coil.
2. a kind of burglar alarm as described in claim 1, it is characterized in that, above-mentioned high-frequency oscillating circuits is the high-frequency oscillating circuits be made up of 555 integrated circuit, above-mentioned oscillation frequency 50KHz, above-mentioned high-frequency oscillating circuits is connected with 12V direct current, and above-mentioned high-frequency oscillating circuits and transmitting coil realize electricity and be connected.
3. a kind of burglar alarm as described in claim 1, it is characterized in that, above-mentioned induction receiving coil and rectification circuit, audio frequency oscillator, loudspeaker realize being electrically connected successively, and above-mentioned audio oscillator circuit is the audio oscillator circuit be made up of 555 integrated circuit, oscillation frequency 10KHz.
4. a kind of burglar alarm as described in claim 1, it is characterized in that, above-mentioned induction receiving coil and transmitting coil near time produce induced voltage, the DC voltage that induced voltage produces through rectifier circuit rectifies is audio frequency oscillator, loudspeaker provides operating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134428.5A CN104978818A (en) | 2014-04-04 | 2014-04-04 | Burglar alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410134428.5A CN104978818A (en) | 2014-04-04 | 2014-04-04 | Burglar alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104978818A true CN104978818A (en) | 2015-10-14 |
Family
ID=54275291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410134428.5A Pending CN104978818A (en) | 2014-04-04 | 2014-04-04 | Burglar alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104978818A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2139281Y (en) * | 1992-10-19 | 1993-07-28 | 贾志平 | Electronic monitor for oil press |
| CN2208254Y (en) * | 1994-06-10 | 1995-09-20 | 薄增力 | Safety hat possessing acoustic and light alarming device |
| DE19702631C2 (en) * | 1997-01-25 | 1998-10-15 | Manfred Dipl Ing Glehr | Anti-theft system for a motor vehicle |
| CN2456247Y (en) * | 2000-12-12 | 2001-10-24 | 四川泰通智能电器有限公司 | Intellectual wireless magnetic door detector |
| CN1826729A (en) * | 2003-07-21 | 2006-08-30 | 皮尔茨公司 | Method and device for reliably monitoring a closed position of two parts moveable relative to one another |
| CN2916791Y (en) * | 2006-06-29 | 2007-06-27 | 张锡琦 | Induction type electric shock thief-proofer |
| CN101702510A (en) * | 2009-11-19 | 2010-05-05 | 上海第二工业大学 | Home-use self-recovering leakage-current alarm and power-failure protection device |
| CN102682541A (en) * | 2012-05-28 | 2012-09-19 | 四川电力科学研究院 | High-voltage transmission line warning indicator |
| CN203520539U (en) * | 2013-07-30 | 2014-04-02 | 浙江恒信科技有限公司 | Door-opening alarm |
| CN104700525A (en) * | 2013-12-04 | 2015-06-10 | 南京化工职业技术学院 | Induction anti-theft alarm |
-
2014
- 2014-04-04 CN CN201410134428.5A patent/CN104978818A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2139281Y (en) * | 1992-10-19 | 1993-07-28 | 贾志平 | Electronic monitor for oil press |
| CN2208254Y (en) * | 1994-06-10 | 1995-09-20 | 薄增力 | Safety hat possessing acoustic and light alarming device |
| DE19702631C2 (en) * | 1997-01-25 | 1998-10-15 | Manfred Dipl Ing Glehr | Anti-theft system for a motor vehicle |
| CN2456247Y (en) * | 2000-12-12 | 2001-10-24 | 四川泰通智能电器有限公司 | Intellectual wireless magnetic door detector |
| CN1826729A (en) * | 2003-07-21 | 2006-08-30 | 皮尔茨公司 | Method and device for reliably monitoring a closed position of two parts moveable relative to one another |
| CN2916791Y (en) * | 2006-06-29 | 2007-06-27 | 张锡琦 | Induction type electric shock thief-proofer |
| CN101702510A (en) * | 2009-11-19 | 2010-05-05 | 上海第二工业大学 | Home-use self-recovering leakage-current alarm and power-failure protection device |
| CN102682541A (en) * | 2012-05-28 | 2012-09-19 | 四川电力科学研究院 | High-voltage transmission line warning indicator |
| CN203520539U (en) * | 2013-07-30 | 2014-04-02 | 浙江恒信科技有限公司 | Door-opening alarm |
| CN104700525A (en) * | 2013-12-04 | 2015-06-10 | 南京化工职业技术学院 | Induction anti-theft alarm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151014 |