CN204288407U - A kind of based on Single-chip Controlling IR alarm system - Google Patents
A kind of based on Single-chip Controlling IR alarm system Download PDFInfo
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- CN204288407U CN204288407U CN201420789202.4U CN201420789202U CN204288407U CN 204288407 U CN204288407 U CN 204288407U CN 201420789202 U CN201420789202 U CN 201420789202U CN 204288407 U CN204288407 U CN 204288407U
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- Burglar Alarm Systems (AREA)
Abstract
The utility model discloses a kind of based on Single-chip Controlling IR alarm system, comprise power supply, processor, pyroelectric infrared sensor, amplifying circuit, light emitting diode warning circuit, audible alarm circuit and reset circuit, power supply is system power supply, the signal output part of pyroelectric infrared sensor connects the signal input part of amplifying circuit, a signal input part of the signal output part connection handling device of amplifying circuit, another signal input part of reset-circuit signal output terminal connection handling device; The signal input part of a signal output part connecting luminous diode warning circuit of processor, another signal output part of processor connects the signal input part of audible alarm circuit.The utility model have employed pyroelectric infrared sensor, and its making is simple, cost is low, install more convenient, and theftproof performance is more stable, and antijamming capability is strong, highly sensitive, safe and reliable.This alarm is installed hidden, is not easily found by robber.
Description
Technical field
The utility model relates to burglar alarm technical field, particularly a kind of based on Single-chip Controlling IR alarm system.
Background technology
People's living standard improves constantly, and to the protective awareness of private property in continuous enhancing, thus proposes new requirement to anti-theft measure.The design is exactly needs in order to meet the unscheduled events such as pre-rob-proof, theft and the guard against theft and alarm system designed.
Just equipment mainly contains the various alarms such as pressure activated formula burglar alarm, switch electronic burglar alarm and pressure shading triggering type anti-theft alarming device on the market at present, but all there are some shortcomings in this several more common alarm: (one) pressure activated formula burglar alarm is arranged in mat because pressure is board-like, when main frame quits work, be easy to lose report and wrong report, its reliability is low.(2) switching regulator electronic anti-theft alarm generally only has a fixed point, and effective range is little, and various switch is also perishable, loses report and rate of false alarm just height, unreliable.(3) light shading type triggers burglar alarm and will cause wrong report being subject to sunlight, if having covered light also can cause wrong report, so the reliability of this alarm is not high simultaneously yet.Further, with regard to closed-circuit control circuit burglary-resisting system: its installation complex circuit, and technical requirement is higher, and price also costly, is unfavorable for extensive utilization.
Summary of the invention
The purpose of this utility model to provide a kind of based on Single-chip Controlling IR alarm system.
For achieving the above object, the utility model is implemented according to following technical scheme:
A kind of based on Single-chip Controlling IR alarm system, comprise power supply, processor, pyroelectric infrared sensor, amplifying circuit, light emitting diode warning circuit, audible alarm circuit and reset circuit, described power supply is system power supply, the signal output part of pyroelectric infrared sensor connects the signal input part of amplifying circuit, a signal input part of the signal output part connection handling device of amplifying circuit, another signal input part of described reset-circuit signal output terminal connection handling device; The signal input part of a signal output part connecting luminous diode warning circuit of described processor, another signal output part of processor connects the signal input part of audible alarm circuit.
Further, described processor is AT89C51 single-chip microcomputer.
As further preferred version of the present utility model, described pyroelectric infrared sensor front end is provided with Fresnel Lenses.
As further preferred version of the present utility model, described amplifying circuit is integrated operational amplifier LM324.
Principle of work: be arranged on the pyroelectric infrared sensor on monitoring point and convert the infrared spectrum of human body radiation to electric signal, after amplifying circuit amplifies, deliver to AT89C51 single-chip microcomputer, single-chip microcomputer sends intrusion alarm state control signal in real time.AT89C51 single-chip microcomputer carries delay circuit, single-chip microcomputer presignal delay 10s a period of time automatically terminates after can be set, also alerting signal can be removed manually, then by light emitting diode warning circuit display alarm number of times, after alert is eliminated, reset circuit makes system reset, or has realization automatically to eliminate warning after sound and light alarm 10s clock.
Compared with prior art, the utility model have employed pyroelectric infrared sensor, and its making is simple, cost is low, install more convenient, and theftproof performance is more stable, and antijamming capability is strong, highly sensitive, safe and reliable.This alarm is installed hidden, is not easily found by robber, and its signal is convenient after Single Chip Microcomputer (SCM) system process simultaneously communicates with PC, is convenient to multi-user's unified management and user operation.
Accompanying drawing explanation
Fig. 1 is circuit structure block diagram of the present utility model;
Fig. 2 is the structural representation of pyroelectric infrared sensor of the present utility model;
Fig. 3 is the circuit diagram of pyroelectric infrared sensor of the present utility model;
Fig. 4 is amplification circuit diagram of the present utility model;
Fig. 5 is reset circuit figure of the present utility model;
Fig. 6 is light emitting diode warning circuit figure of the present utility model;
Fig. 7 is audible alarm circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described, is used for explaining the utility model in the illustrative examples of this utility model and explanation, but not as to restriction of the present utility model.
One is as shown in Figure 1 based on Single-chip Controlling IR alarm system, comprise power supply, processor, pyroelectric infrared sensor, amplifying circuit, light emitting diode warning circuit, audible alarm circuit and reset circuit, described power supply is system power supply, the signal output part of pyroelectric infrared sensor connects the signal input part of amplifying circuit, a signal input part of the signal output part connection handling device of amplifying circuit, another signal input part of described reset-circuit signal output terminal connection handling device, the signal input part of a signal output part connecting luminous diode warning circuit of described processor, another signal output part of processor connects the signal input part of audible alarm circuit, processor is AT89C51 single-chip microcomputer, AT89C51 single-chip microcomputer is Atmel company of U.S. production low-voltage, high-performance CMOS 8 single-chip microcomputers, sheet include 4k bytes can be repeatedly erasable read-only program memory (EPROM) and the random access data storage (RAM) of 128 bytes, device adopts the high density of Atmel company, non-volatile access technique is produced, compatibility standard MCS-51 order set, sheet built-in general-purpose 8 central processing units (CPU) and Flash storage unit, powerful.AT89C51 single-chip microcomputer can provide the application scenario of many high performance-price ratios, can flexible Application in various control field.
As shown in Figure 2, pyroelectric infrared sensor 1 front end is provided with Fresnel Lenses 2, as shown in Figure 3, its operating circuit principle: utilize C1 and R2 to carry out stable operating voltage at VCC power end, same output terminal has also added voltage stabilizing element stabilization signal to the circuit diagram of pyroelectric infrared sensor.When human mobile signal being detected, charge signal, after field effect transistor FET amplifies, makes output become noble potential after the voltage stabilizing of C2, R1, then through the conversion of triode Q2, output OUT is low level; When in the infrared ray of human body radiation to be focused on pyroelectric infrared sensor detection unit by Fresnel Lenses, sensor in circuit is by output voltage signal, then the bandpass filter that this signal is made up of C1, C2, R1, R2 by is made, the upper cut-off frequency of this wave filter is 16Hz, and lower-cut-off frequency is 0.16Hz.Due to the detectable signal voltage very faint (usually only having about 1mV) that pyroelectric infrared sensor exports, and be the signal of a change, the effect of Fresnel Lenses simultaneously makes again output signal voltage be that (frequency of pulse voltage is determined by the translational speed of testee impulse form, be generally about 0.1-10Hz), so the voltage signal that reply heat releases infrared sensor output amplifies, the utility model uses integrated operational amplifier LM324 to carry out two-stage amplification, obtains enough gains to make it; As shown in Figure 4, Vi is the voltage signal that input voltage signal instant heating releases infrared sensor output to amplifying circuit, through triode Q
2the voltage signal Vo of amplification is exported after operation amplifier.This pyroelectric infrared sensor and amplifying circuit match, and signal can be amplified more than 70 decibels, so just can measure the action of people within the scope of 10-20 rice.
Be illustrated in figure 5 reset circuit, when this reset circuit uses crystal oscillator frequency for 12MHz, then the reset signal duration should be not less than 2us, and this reset circuit connects the RESET pin of AT89C51 single-chip microcomputer.
Be illustrated in figure 6 light emitting diode warning circuit, connect the pin of the RXD of AT89C51 monolithic after connecting resistance by 4 light emitting diodes, external VCC, after the RXD pin of single-chip microcomputer is set to low level, light emitting diode is lit, and plays alarm function; Be illustrated in figure 7 audible alarm circuit, receive on the P2.0 pin of AT89C51 single-chip microcomputer with a Speaker and triode, resistance, form audible alarm circuit, low level triggers.
When the utility model uses, after AT89C51 microprocessor detect to release the pulse signal that point sensor sends here to external heat, indicate that people swarms into monitored space, thus after the process of AT89C51 single-chip microcomputer, light emitting diode warning circuit and sound warning circuit is driven to start to report to the police, automatic stop alarm after warning continued for 10 seconds, demonstrate alarm times so that people's inquiry simultaneously, then periodic duty is started, detect and whether also have next trigger pip, wait for and report to the police thus make alarm enter continuous duty.Meanwhile, utilize interrupt mode can realize reporting to the police the duration not by 10 seconds time, the effect of sound and light alarm that stops of button by hand.
The technical solution of the utility model is not limited to the restriction of above-mentioned specific embodiment, and every technology distortion made according to the technical solution of the utility model, all falls within protection domain of the present utility model.
Claims (4)
1. one kind based on Single-chip Controlling IR alarm system, it is characterized in that, comprise power supply, processor, pyroelectric infrared sensor, amplifying circuit, light emitting diode warning circuit, audible alarm circuit and reset circuit, described power supply is system power supply, the signal output part of pyroelectric infrared sensor connects the signal input part of amplifying circuit, a signal input part of the signal output part connection handling device of amplifying circuit, another signal input part of described reset-circuit signal output terminal connection handling device; The signal input part of a signal output part connecting luminous diode warning circuit of described processor, another signal output part of processor connects the signal input part of audible alarm circuit.
2. according to claim 1 based on Single-chip Controlling IR alarm system, it is characterized in that: described processor is AT89C51 single-chip microcomputer.
3. according to claim 1 based on Single-chip Controlling IR alarm system, it is characterized in that: described pyroelectric infrared sensor front end is provided with Fresnel Lenses.
4. according to claim 1 based on Single-chip Controlling IR alarm system, it is characterized in that: described amplifying circuit is integrated operational amplifier LM324.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420789202.4U CN204288407U (en) | 2014-12-15 | 2014-12-15 | A kind of based on Single-chip Controlling IR alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420789202.4U CN204288407U (en) | 2014-12-15 | 2014-12-15 | A kind of based on Single-chip Controlling IR alarm system |
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| Publication Number | Publication Date |
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| CN204288407U true CN204288407U (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420789202.4U Expired - Fee Related CN204288407U (en) | 2014-12-15 | 2014-12-15 | A kind of based on Single-chip Controlling IR alarm system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106530562A (en) * | 2016-11-08 | 2017-03-22 | 骆香山 | Infrared anti-theft system based on single-chip microcomputer |
| CN106981161A (en) * | 2017-04-27 | 2017-07-25 | 榆林学院 | A kind of induction type warning circuit |
| CN107545686A (en) * | 2016-06-29 | 2018-01-05 | 张旭 | A kind of design based on monolithic processor controlled IR intrusion detector |
| CN111681379A (en) * | 2019-12-23 | 2020-09-18 | 江苏如高第三代半导体产业研究院有限公司 | AT89C 52-based intelligent alarm system circuit structure |
-
2014
- 2014-12-15 CN CN201420789202.4U patent/CN204288407U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107545686A (en) * | 2016-06-29 | 2018-01-05 | 张旭 | A kind of design based on monolithic processor controlled IR intrusion detector |
| CN106530562A (en) * | 2016-11-08 | 2017-03-22 | 骆香山 | Infrared anti-theft system based on single-chip microcomputer |
| CN106981161A (en) * | 2017-04-27 | 2017-07-25 | 榆林学院 | A kind of induction type warning circuit |
| CN111681379A (en) * | 2019-12-23 | 2020-09-18 | 江苏如高第三代半导体产业研究院有限公司 | AT89C 52-based intelligent alarm system circuit structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151215 |
|
| EXPY | Termination of patent right or utility model |