CN203047163U

CN203047163U - Anti-theft device for vehicle

Info

Publication number: CN203047163U
Application number: CN 201220633079
Authority: CN
Inventors: 吕魁超; 赵玉河; 孙恩民; 梁景雨; 马强
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2012-11-26
Filing date: 2012-11-26
Publication date: 2013-07-10
Anticipated expiration: 2022-11-26

Abstract

The utility model discloses an anti-theft device for a vehicle. An acceleration sensor is connected with an input end of a host machine through a noise filter module and a signal amplification module which are sequentially connected, an output end of the host machine is respectively connected with a vehicle LED (light emitting diode) alarm display screen, a relay and an acousto-optic alarm module, a vehicle GPS (global position system) receiving antenna is connected with the host machine through a vehicle GPS receiving module, and the host machine is further connected with an inferior machine; and the inferior machine is connected with a GSM (global system for mobile communication)/ GPRS (general packet radio service) module through a high-frequency wireless data transmission anti-interference module, the GSM/GPRS module is connected with a cellphone of an car owner through a GSM network, and a liquid crystal display screen and pressing buttons are further connected onto the GSM/GPRS module. By the adoption of the anti-theft device, the human-vehicle communication is realized through the GSM/GPRS network, and a facilitating device for remote monitoring the vehicle is provided for the car owner; and the anti-theft device has the characteristics of low energy consumption, high precision and accurate detection.

Description

A kind of alarms and security systems for automobiles

Technical field

The utility model belongs to field of automobile safety, is specifically related to a kind of alarms and security systems for automobiles.

Background technology

Increase along with automobile pollution, the car clout phenomenon occurs repeatedly, the most frequently used device is magnetic effect formula acceleration pick-up now, but it can not measure static acceleration/accel, so can't tackle robber's car event of now multiple trailer or car load carrying formula, therefore the micro-machine acceleration transducer that can measure static acceleration/accel just becomes first-selection, the method that adopts this accelerometer and the GSM/GPRS mechanics of communication of popularizing now and GPS global positioning system to combine, improve scope and the reliability of automobile anti-theft alarm greatly, had very strong Practical significance.

Summary of the invention

At the deficiency that prior art exists, the purpose of this utility model is, a kind of alarms and security systems for automobiles is provided, and can make the car owner when the distance automobile is far away, and the mobile phone that passes through oneself that can be real-time is understood the condition of the vehicle of oneself.

In order to realize above-mentioned task, the utility model adopts following technical scheme to be achieved:

A kind of alarms and security systems for automobiles, comprise acceleration pick-up, main frame, slave, relay, GSM/GPRS module and car owner's mobile phone, acceleration pick-up links to each other with the input end of main frame with the signal amplification module by the noise filtering module that links to each other successively, the mouth of main frame links to each other with vehicle LED alarm display screen, relay and acousto-optic alarm module respectively, the vehicle GPS receiving wire links to each other with main frame by the vehicle GPS receiver module, and main frame also is connected with slave; Slave transmits immunity module by the high frequency wireless data and links to each other with the GSM/GPRS module, and the GSM/GPRS module links to each other with car owner's mobile phone by the GSM network, also is connected with Liquid Crystal Display (LCD) and button on the GSM/GPRS module.

The utility model also has following technical characterstic:

Described main frame and slave all adopt the ATMEGA16L-8AU micro controller system.

Described acceleration pick-up adopts three little measuring range acceleration sensors of MMA7361.

It is the GSM/GPRS module of SIM100 that described GSM/GPRS module adopts model.

The utility model has been realized the mutual communication of people's car by the GSM network, when vehicle is stolen, safety case information and the location information of vehicle are sent on car owner's mobile phone by way of short messages, make the car owner can long-rangely know the stolen information of own vehicle and concrete position, and can control the startup of vehicle by note.It is low to the utlity model has energy consumption, easy for installation, low-cost, low rate of false alarm, and pinpoint accuracy detects characteristic of accurate.

Description of drawings

Fig. 1 is hardware connection diagram of the present utility model.

Below in conjunction with drawings and Examples particular content of the present utility model is done explanation in further detail.

The specific embodiment

Below provide specific embodiment of the utility model, need to prove that the utility model is not limited to following specific embodiment, all equivalents of doing on present techniques scheme basis all fall into protection domain of the present utility model.

Defer to technique scheme, as shown in Figure 1, a kind of alarms and security systems for automobiles, comprise acceleration pick-up, main frame, slave, relay, GSM/GPRS module and car owner's mobile phone, acceleration pick-up links to each other with the input end of main frame with the signal amplification module by the noise filtering module that links to each other successively, the mouth of main frame links to each other with vehicle LED alarm display screen, relay and acousto-optic alarm module respectively, the vehicle GPS receiving wire links to each other with main frame by the vehicle GPS receiver module, and main frame also is connected with slave; Slave transmits immunity module by the high frequency wireless data and links to each other with the GSM/GPRS module, and the GSM/GPRS module links to each other with car owner's mobile phone by the GSM network, also is connected with Liquid Crystal Display (LCD) and button on the GSM/GPRS module.

Described main frame and slave all adopt the ATMEGA16L-8AU micro controller system.This micro controller system comprises 8 AVR microprocessors of High Performance, low-power consumption, advanced risc architecture, the EEPROM of 512 bytes erasable 10,000 time, four-way PWM, 8 tunnel 10 ADC, its chip integration has become UART, SPI, interfaces such as I2C, this interface module can utilize these interfaces to communicate by letter with other system.

Described acceleration pick-up adopts the MMA7361 acceleration pick-up of Freescale company, and three a small amount of journey acceleration sensors are the sensors that detect object motion and direction, and it changes the magnitude of voltage of output signal according to object motion and direction.The signal of each do not move or not by the state of gravity effect under (0g), it is output as 1.65V.If along some direction activities, perhaps be subjected to the gravity effect, output voltage will change its output voltage according to the transducer sensitivity of its sense of motion and setting.3-axis acceleration sensor also can be measured each axial accekeration of dip compass respectively, and then each the angle of inclination of asking.

Described noise filtering module and signal amplification module are this area noise filter circuit and signal amplification circuit commonly used.

It is the GPS module of GT-710F that described vehicle GPS receiver module adopts model, can receive 44 satellites simultaneously; Accuracy of positioning can reach 5 meters; External antenna is supported in low-power consumption, and it is by serial ports and host communication.The positioning signal that obtains is passed through host process, give slave by the SPI interface again, by slave control GSM/GPRS module.

The model that described GSM/GPRS module adopts SIMCOM company to provide is the GSM/GPRS module of SIM100, and this GSM/GPRS module has the standard AT command interface, and business such as GSM voice, short message and GPRS online can be provided.SIM100 is GSM/GPRS double frequency module, and it carries the RS232 communication interface, can connect the machine communication with PC, micro controller system easily.

It is GD-R5D that described high frequency wireless data transmits the immunity module model, is that a kind of VHF/UHF superhigh frequency wireless data transmits high-quality superheterodyne reception module and can strengthen antijamming capability/improve decode waveform to mobile phone.

Liquid Crystal Display (LCD) adopts the 5110(PCD8544 of Nokia controller) Liquid Crystal Display (LCD), 48*84 dot matrix LCD, and undertaken alternately by button and GSM/GPRS module, button can arrange subscriber phone number, also can be used for showing short message content.When the car owner leaves car, Liquid Crystal Display (LCD) can be disconnected demonstration, with saves energy, and increase disguised.

Described relay adopts normally closed relay commonly used, drives by a NPN aerotron.

Described sound and light alarm module adopts steering indicating light, the Der Blink und Abblendschalter of automobile itself, adds loudspeaker and forms.

Described alarm display screen selects for use multi-disc 16x16 dot matrix commonly used to form, and is installed in the vehicle rear window glass, selects for use 74LS154 and NPN aerotron to drive.

In order to prevent that the burglar from removing warning circuit by cutting off storage battery, the power supply of this device adopts the another set of independently vehicle power that is independent of Vehicular accumulator cell to install power supply for this reason, and voltage is 5V.Degree of will speed up sensor is installed in center chassis.

Acceleration pick-up can be measured each axial accekeration of dip compass respectively, and then each the angle of inclination of asking.3 road analog voltage signals that 3-axis acceleration sensor is provided, this 3 road voltage signal is handled the built-in A/D translation interface of back input main frame through noise filtering module and signal amplification module, the voltage signal that degree of will speed up sensor detects is converted into the accessible digital signal of micro controller system, measures 3 shaft inclination changing values.As trailer or when removing movable generation of robber's car of car, the tilting of car body angle of this moment will inevitably change, the accekeration that acceleration pick-up obtains three axles also can change, and signal is transported in the main frame and handles, and voltage signal is converted to the digital signal of tilting of car body angle.Judge by main frame whether the angle change of car body surpasses the scope of predetermined angle then, if surpassing then can regarding as is to have the behavior of stealing car or destroying car to take place, if surpass predetermined angle, think that then the behavior of not stealing car or destruction car takes place.There is the behavior of stealing car or destroying car to take place if judged, then at first cut off feed circuit and the fuel injection signal circuit of automobile ignition switch by relay, and driving sound and light alarm module is reported to the police, main frame sends signal to slave simultaneously, slave control GSM/GPRS module sends alarming short message to the car owner's mobile phone that preestablishes number, reminds the car owner garage of robber to be arranged for taking place, and mixes the positioning function that GPS provides, just in case vehicle is stolen, then very be conducive to the recovery of stolen vehicle.

The car owner can also obtain the position of automobile this moment by sending note, to determine whether car changes the position.The vehicle GPS receiving wire receives gps signal, and gps signal is exported to main frame after the vehicle GPS receiver module is handled, and main frame is realized communication by SPI interface and slave, slave control GSM/GPRS module and car owner's mobile phone realization communication after with position information process.If the automobile that the burglar starts in other way, the vehicle LED alarm display screen on the vehicle rear window can show " this car is stolen robbing, please assist to report to the police " printed words.

Claims

1. alarms and security systems for automobiles, comprise acceleration pick-up, main frame, slave, relay, GSM/GPRS module and car owner's mobile phone, it is characterized in that, acceleration pick-up links to each other with the input end of main frame with the signal amplification module by the noise filtering module that links to each other successively, the mouth of main frame links to each other with vehicle LED alarm display screen, relay and acousto-optic alarm module respectively, the vehicle GPS receiving wire links to each other with main frame by the vehicle GPS receiver module, and main frame also is connected with slave; Slave transmits immunity module by the high frequency wireless data and links to each other with the GSM/GPRS module, and the GSM/GPRS module links to each other with car owner's mobile phone by the GSM network, also is connected with Liquid Crystal Display (LCD) and button on the GSM/GPRS module.

2. alarms and security systems for automobiles as claimed in claim 1 is characterized in that, described main frame and slave all adopt the ATMEGA16L-8AU micro controller system.

3. alarms and security systems for automobiles as claimed in claim 1 is characterized in that, described acceleration pick-up adopts three little measuring range acceleration sensors of MMA7361.

4. alarms and security systems for automobiles as claimed in claim 1 is characterized in that, it is the GSM/GPRS module of SIM100 that described GSM/GPRS module adopts model.