CN101996464A - License plate anti-theft alarm device - Google Patents
License plate anti-theft alarm device Download PDFInfo
- Publication number
- CN101996464A CN101996464A CN2009100562845A CN200910056284A CN101996464A CN 101996464 A CN101996464 A CN 101996464A CN 2009100562845 A CN2009100562845 A CN 2009100562845A CN 200910056284 A CN200910056284 A CN 200910056284A CN 101996464 A CN101996464 A CN 101996464A
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- Prior art keywords
- infrared
- infrared ray
- screw
- license plate
- emission tube
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- Burglar Alarm Systems (AREA)
Abstract
The invention discloses a license plate anti-theft alarm device, which consists of an infrared emitter diode, an infrared receiver diode, and an electronic circuit used for driving emission and processing the received infrared signals, wherein the infrared emitter diode is arranged in a circular tube; a convex lens is arranged in the circular tube and is placed at the emitting end of the infrared emitter diode; the infrared receiver diode is arranged in another circular tube; the infrared emitter diode and the infrared receiver diode are respectively arranged on two sides of a screw; and the screw is used for fastening the license plate. In the fastening state, the screw passes through the license plate and an automobile shell, and the extended part of the screw blocks between the emitter diode and the receiver diode, so that the receiver diode cannot receive infrared rays and the alarm device does not alarm; and if the screw is screwed out, namely the license plate is stolen, the receiver diode can receive the infrared rays immediately, and the alarm device generates loud alarm sound immediately.
Description
Affiliated technical field
The present invention relates to a kind of burglar alarm, specifically relate to a kind of license plate burglar alarm.
Background technology
At present, existing license plate does not have burglar alarm, so the robber can not send chimes of doom when the stolen car licence plate, thereby does not reach the effect of in time realizing and drawing back the robber with fear.
Summary of the invention
The purpose of this invention is to provide a kind of license plate burglar alarm, can send loud chimes of doom the robber during at the stolen car licence plate, for reaching above-mentioned purpose, the technical scheme that technical solution problem of the present invention is adopted is: form a license plate burglar alarm by an infrared emission tube, an infrared ray receiver pope and an electronic circuit that is used to drive the power valve emission and handle the receiver pope signal.Described infrared emission tube is contained in the pipe, a convex lens is housed in the described pipe, described convex lens is positioned over the infrared emission tube transmitting terminal, the effect of described convex lens is that the infrared ray of launching is gathered into a branch of directional light, described infrared ray receiver pope similarly is contained in another pipe, be contained in the infrared emission tube in the pipe and be contained in two sides that the interior infrared ray receiver pope of another pipe is positioned over screw respectively, described screw is used for fastening license plate, described screw is when tightening state, its extension retaining was between infrared emission tube and infrared ray receiver pope after screw passed license plate and automobile case, thereby the infrared ray receiver pope can't accept the infrared ray that next infrared emission tube sends, if screw is licence plate when stolen by back-out, because of blocking receiver pope, no screw can receive infrared ray at once between infrared and the receiver pope.Contain a LM567 frequency demodulation chip in the described electronic circuit, its 4 pin connects power supply, 7 pin ground wires, 1 pin, each is connected 2 pin with ground wire through an electric capacity, 5 pin are square wave output terminals, its output frequency is by being connected on 5 pin, a resistance between 6 pin and be connected on 6 pin, an electric capacity decision between the ground wire, 5 pin are through an electric capacity, a resistance is connected with the base stage of triode, the grounded emitter of triode, be connected in series an infrared emission tube and a current-limiting resistance between the collector of triode and the power supply, the square wave of 5 pin output makes triode take turns conducting, end, infrared emission tube is by this modulating frequency emission infrared ray, 3 pin are infrared ray receiving terminals, this end through an electric capacity respectively with the negative pole of infrared ray receiver pope, one end of resistance connects, the plus earth of infrared ray receiver pope, and the other end of resistance is connected with power supply, by the demodulation of LM567 chip, exported by 8 pin by its signal the modulated infrared ray that receives for 3 pin.
Working method of the present invention is: under the normality situation, the reason screw blocks the infrared ray receiver pope and can't accept infrared ray, the output of LM567 chip 8 pin no signals, so do not report to the police, under the stolen situation, can receive infrared ray because of no screw blocks the infrared ray receiver pope, LM567 chip 8 pin have signal output, so can report to the police at once (warning circuit does not draw).
To be that license plate is stolen can report to the police advantage of the present invention at once, reaches the effect of in time realizing and drawing back the robber with fear with this.
Description of drawings
Fig. 1 is infrared emission tube and infrared ray receiver pope position assumption diagram
Fig. 2 is an electronic-circuit diagram
Embodiment
With reference to Fig. 1, Fig. 2 will specifically narrate embodiment of the present invention: infrared emission tube 1 shown in Figure 1, infrared ray receiver pope 4, pipe 2,3, license plate 5, screw 6, the structure of automobile case 7 and position relation, figure 2 illustrates infrared emission tube 1, infrared ray receiver pope 4, screw 6, power supply 21, resistance 9,11,12,19, signal output part 18, LM567 frequency demodulation chip 20, electric capacity 14,15,16,17 connection and position relation, by an infrared emission tube 1, an infrared ray receiver pope 4 and an electronic circuit that is used to drive the power valve emission and handle the receiver pope signal are formed a license plate burglar alarm, infrared emission tube 1 is contained in the pipe 2, a convex lens 8 is housed in the pipe 2, convex lens 8 is positioned over the transmitting terminal of infrared emission tube 1, the effect of convex lens 8 is that the infrared ray of launching is gathered into a branch of directional light, infrared ray receiver pope 4 is contained in another pipe 3, be contained in the infrared emission tube 1 in the pipe 3 and be contained in two sides that another pipe 3 interior infrared ray receiver popes 4 are positioned over screw 6 respectively, screw 6 is used for fastening license plate 5, screw 6 is when tightening state, screw passes license plate 5 and automobile case 7 its extensions of back keep off between infrared emission tube 1 and infrared ray receiver pope 4, thereby this state infrared ray receiver pope 4 can't accept the infrared ray that next infrared emission tube 1 sends, if it is license plate 5 when stolen that screw 6 is screwed out, because of blocking infrared ray receiver pope 4, no screw 6 can receive infrared ray at once between infrared emission tube 1 and the infrared ray receiver pope 4.Contain a LM567 frequency demodulation chip 20 in the described electronic circuit, its 4 pin connects power supply, 7 pin ground wires, 1 pin, 2 pin are respectively through an electric capacity 14,15 are connected with ground wire, 5 pin are square wave output terminals, its output frequency is by the resistance of resistance 19 and the capacity decision of electric capacity 17,5 foot meridian capacitors 16, resistance 11 is connected with the base stage of triode 10, the grounded emitter of triode 10, be connected in series an infrared emission tube 1 and resistance 9 between the collector of triode and the power supply, the square wave of 5 pin output makes triode 10 conductings in turn, end, infrared emission tube 1 is by this modulating frequency emission infrared ray, 3 pin are infrared ray receiving terminals, this end through electric capacity 13 respectively with the negative pole of infrared ray receiver pope 4, one end of resistance 12 connects, the plus earth of infrared ray receiver pope 4, and the other end of resistance 12 is connected with power supply 21, by the demodulation of LM567 chip, exported by 8 pin by its signal the modulated infrared ray that receives for 3 pin.
Claims (3)
1. a license plate burglar alarm is used to drive the power valve emission by an infrared emission tube 1 and infrared ray receiver pope 4 and one and forms with the electronic circuit of handling the receiver pope signal, it is characterized in that: infrared emission tube 1 is contained in the pipe 2, a convex lens 8 is housed in the pipe 2, convex lens 8 is positioned over the transmitting terminal of infrared emission tube 1, and infrared ray receiver pope 4 is contained in another pipe 3.
According to claims 1 described be contained in the infrared emission tube 1 in the pipe 3 and be contained in infrared ray receiver popes 4 in another pipe 3 be positioned over the two other of screw 6 respectively.
3. be used for fastening license plate 5 according to claims 2 described screws 6, screw 6 is when tightening state, screw passes license plate 5 and automobile case 7 its extensions of back keep off between infrared emission tube 1 and infrared ray receiver pope 4, thereby this state infrared ray receiver pope 4 can't accept the infrared ray that next infrared emission tube 1 sends, if it is license plate 5 when stolen that screw 6 is screwed out, because of blocking infrared ray receiver pope 4, no screw 6 can receive infrared ray at once between infrared emission tube 1 and the infrared ray receiver pope 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100562845A CN101996464A (en) | 2009-08-12 | 2009-08-12 | License plate anti-theft alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100562845A CN101996464A (en) | 2009-08-12 | 2009-08-12 | License plate anti-theft alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101996464A true CN101996464A (en) | 2011-03-30 |
Family
ID=43786567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100562845A Pending CN101996464A (en) | 2009-08-12 | 2009-08-12 | License plate anti-theft alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101996464A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106408708A (en) * | 2016-09-12 | 2017-02-15 | 国家电网公司 | High-low-voltage electric meter box access control system |
| CN106447851A (en) * | 2016-09-12 | 2017-02-22 | 国家电网公司 | High-low-voltage electric meter box access control system provided with ZigBee wireless communication module |
-
2009
- 2009-08-12 CN CN2009100562845A patent/CN101996464A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106408708A (en) * | 2016-09-12 | 2017-02-15 | 国家电网公司 | High-low-voltage electric meter box access control system |
| CN106447851A (en) * | 2016-09-12 | 2017-02-22 | 国家电网公司 | High-low-voltage electric meter box access control system provided with ZigBee wireless communication module |
| CN106408708B (en) * | 2016-09-12 | 2017-11-24 | 国家电网公司 | High-low pressure ammeter box gate control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110330 |