CN103223920A

CN103223920A - Anti-theft and alarm system for vehicles

Info

Publication number: CN103223920A
Application number: CN 201310115075
Authority: CN
Inventors: 陈世学
Original assignee: CHENGDU KELIN YUAN ELECTRONIC EQUIPMENT Co Ltd
Current assignee: CHENGDU KELIN YUAN ELECTRONIC EQUIPMENT Co Ltd
Priority date: 2013-04-05
Filing date: 2013-04-05
Publication date: 2013-07-31

Abstract

The invention discloses an anti-theft and alarm system for vehicles. According to the system, a telephone network is used for monitoring, a dual-tone multi-frequency dial-up circuit comprising an AT89S31 singlechip, an ISD4000 integrated voice chip, an HT1602 liquid crystal display driver chip and an integrated circuit and the like are organically combined, so that the anti-theft and alarm system for vehicles which is practical and low in cost is formed.

Description

Anti-theft alarm system for vehicles

Technical field

The present invention relates to a kind of guard against theft and alarm system, particularly a kind of intelligent vehicle anti-theft system that carries out Long-distance Control, strange land monitoring.

Background technology

Fast development along with Chinese national economy, the raising of living standards of the people, people to vehicle antitheft, anti-rob, flameproof attention degree also improving constantly, accidents such as more people need be stolen vehicle so modern society has, robbery or spontaneous combustion are monitored and are reported to the police.

Summary of the invention

The technical matters that the present invention solves is to provide a kind of the realization at any time vehicle to be carried out the strange land monitoring, and can in time information be passed to owner, convenient, safe anti-theft alarm system for vehicles when causing danger situation at home.

For solving the problems of the technologies described above, the present invention has adopted anti-theft alarm system for vehicles, comprise micro controller system, the alerting signal acquisition module, alarm module, Keysheet module, LCD MODULE, voice module, DTMF separates/coding module, telephone interface circuit module and power module, it is characterized in that: described alerting signal acquisition module, alarm module, Keysheet module, LCD MODULE, voice module, DTMF separates/and coding module connects micro controller system respectively, described voice module, DTMF separates/coding module connection telephone interface circuit module, and described power module connects micro controller system; Described alerting signal acquisition module comprises distribution and micro controller system bonded assembly door and window magnetic alarm module, detection module and shock sensor.

Described micro controller system adopts the AT89S51 chip, described voice module adopts the ISD4000 chip, described DTMF separates/and coding module adopts HT9200B to make the dtmf code device respectively, HT9170 does dtmf decoder, and described telephone interface circuit module comprises ring detecting circuit, off-hook control circuit and ring-back testing circuit.

The beneficial effect that the present invention has: this system utilizes telephone network to monitor, the DTMF pulsing circuit that AT89S51 micro controller system, ISD4000 integrated speech chip, HT1602 liquid crystal display drive chip and integrated circuit are formed etc. organically combines, and constitutes a kind of practicality, home intelligent guard against theft and alarm system with low cost.

Description of drawings

Fig. 1 is a structured flowchart of the present invention.

The specific embodiment

Anti-theft alarm system for vehicles as shown in Figure 1, comprise that micro controller system, alerting signal acquisition module, alarm module, Keysheet module, LCD MODULE, voice module, DTMF separate/coding module, telephone interface circuit module and power module, it is characterized in that: described alerting signal acquisition module, alarm module, Keysheet module, LCD MODULE, voice module, DTMF separate/and coding module connects micro controller system respectively, described voice module, DTMF separate/coding module connection telephone interface circuit module, and described power module connects micro controller system; Described alerting signal acquisition module comprises distribution and micro controller system bonded assembly door and window magnetic alarm module, detection module and shock sensor.Described micro controller system adopts the AT89S51 chip, described voice module adopts the ISD4000 chip, described DTMF separates/and coding module adopts HT9200B to make the dtmf code device respectively, HT9170 does dtmf decoder, and described telephone interface circuit module comprises ring detecting circuit, off-hook control circuit and ring-back testing circuit.

The principle of work of this system is: when vehicle generation alert, wireless module in the car or other sensor assemblies can send abnormal signal and give micro controller system at this moment, micro controller system receives and sends the acoustic scene visual alarm immediately behind the signal and deter the effractor, simultaneously micro controller system is dialed automatically the telephone number that is stored in advance among the 24C02 and reported to the police for owner or sub-district property, so that in time take anti-theft measure to avoid property damage.When owner wants to monitor situation in the car or the switch on the telecar in the strange land, only need dial the fixed telephone number in the family, because the telephony interface of this warning is connected in parallel on the telephone set, the back is unmanned to be connected if the tinkle of bells rings repeatedly, then this warning is just simulated off-hook automatically, after owner imports predetermined cipher, just can monitor the pass, disconnected of sound in the car and control vehicle oil circuit and circuit.

The AT89S51 chip that the micro controller system of system adopts atmel corp to produce.AT89S51 is a low-power consumption, 8 micro controller systems of high-performance CMOS, sheet include 4k Bytes ISP can be erasable repeatedly 1000 times the Flash read-only program memory, characteristics with high density, nonvolatile storage technologies, integrated general 8 central process units and ISP Flash memory cell in the chip.

Wireless module mainly is to handle infrared, wireless signal.Comprise sensor assemblies such as door and window magnetic alarm module, detection module, shock sensor.The car door magnetic alarm module of Cai Yonging here, the car door magnetic detector is selected wireless door magnetic for use, is made up of a permanent magnet and door magnetic main body two parts.

System adopts pir intrusion detector, be used for detecting robber's feelings, if stealing feelings takes place, trigger external interrupt 0, micro controller system receives the report for police service after the signal, begins to start flicker such as LED and reports to the police, start the audible alarm of 100dB simultaneously, frighten the thief, give phone module signal simultaneously, notify owner or alarm center.

LCD MODULE adopts LCD1602 to realize, radical function is to be used for the temperature and the functions such as type of display alarm when reporting to the police in demonstration time, date, the car.The employing ISD4000 chip of voice module.

The shared telephone wire of alarm circuit and subsets.Select for use HT9200B to make the dtmf code device, HT9170 does dtmf decoder.Provide 4 definite bits to HT9200B,,, just can export corresponding D TMF signal, and dtmf signal is delivered on the telephone wire, realize automatic dialing from 13 pin from the D0-D3 input such as telephone number; The function of HT9170 mainly is that the dtmf signal that will import is transformed to corresponding binary number, and decoding remote phone push button signalling is sent to micro controller system, realizes Long-distance Control.

The telephony interface module comprises ring detecting circuit, off-hook control circuit and ring-back testing circuit.Ring detects and is meant behind the certain number of times of ring, if the ring unanswered then inputs password by owner, after the password input is correct, then simulates off-hook automatically by micro controller system, to check the situation in the car, if the then on-hook by force of continuous 3 the input mals of password.In the ring detecting circuit, the AC signaling signal of 25Hz passes through voltage stabilizing again after overcommutation, send into photoelectrical coupler, exports the external interrupt 0 that square-wave signal is given micro controller system again, differentiates ringdown with software.Utilize aerotron to come the analog telephone off-hook in the simulation off-hook detection circuit.When the Q4 ground level was low level, the collecting electrode of Q3 and emitter disconnected, and are on hook; When the Q4 ground level was high level, the collecting electrode of Q3 and emitter saturation conduction were off-hook status, so telephone signal is sent into during level.Ring back tone, busy tone, the line errors sound process sound of expecting someone's call is that carrier wave is the signal of 450Hz, and just cycle, the dutycycle difference of modulation that various signals are different are so are cycle and the dutycycles that detect the signal of 450Hz to the detection of these signals.This circuit utilizes phaselocked loop LM567 to constitute testing circuit, and when incoming signal was 450Hz, the LM567 output low level was sent into micro controller system and utilized software to distinguish various signals.

Claims

1. anti-theft alarm system for vehicles, comprise that micro controller system, alerting signal acquisition module, alarm module, Keysheet module, LCD MODULE, voice module, DTMF separate/coding module, telephone interface circuit module and power module, it is characterized in that: described alerting signal acquisition module, alarm module, Keysheet module, LCD MODULE, voice module, DTMF separate/and coding module connects micro controller system respectively, described voice module, DTMF separate/coding module connection telephone interface circuit module, and described power module connects micro controller system; Described alerting signal acquisition module comprises distribution and micro controller system bonded assembly door and window magnetic alarm module, detection module and shock sensor.

2. anti-theft alarm system for vehicles according to claim 1, it is characterized in that: described micro controller system adopts the AT89S51 chip, described voice module adopts the ISD4000 chip, described DTMF separates/and coding module adopts HT9200B to make the dtmf code device respectively, HT9170 does dtmf decoder, and described telephone interface circuit module comprises ring detecting circuit, off-hook control circuit and ring-back testing circuit.