CN105253103A - Vehicle intelligent antitheft system based on internet of things - Google Patents

Abstract

The invention discloses an intelligent anti-theft system for automobiles based on the Internet of Things, which is composed of an intelligent anti-theft device and an anti-theft management system. The intelligent anti-theft device and the anti-theft management system perform data exchange through 3G wireless communication; module, gyroscope sensor module, acceleration sensor module, magnetometer sensor module, temperature sensor module, smoke sensor module, system microprocessor MCU, GPS positioning module, voice warning module, LED flashing alarm module, siren continuous alarm module, 3G wireless Composed of communication module and LCD display module. The system microprocessor MCU is connected to other modules respectively. The present invention utilizes multiple sensors to sense in real time that the car has been smashed, pried, stolen or towed away. If the above phenomenon occurs, the intelligent anti-theft device will automatically broadcast voices, sirens, and LED lights will give an early warning.

Description

An intelligent car anti-theft system based on the Internet of Things

technical field

The invention relates to an automobile anti-theft system, in particular to an intelligent automobile anti-theft system based on the Internet of Things.

Background technique

In recent years, with the rapid development of my country's economy and the continuous improvement of people's material living standards, buying cars as a means of transportation has gradually become accepted by ordinary people. In our country, the number of individual car ownership is increasing rapidly. However, what followed was that the number of car theft cases nationwide has been running at a high level, and it has become one of the major criminal activities that endanger the safety of public and private property. Especially in Guangdong, Shanghai, Shandong, Fujian and other areas with a large number of automobiles, car theft crimes occur frequently. The high incidence of such cases not only seriously infringed on the legitimate rights and interests of the majority of car owners, but also caused huge property losses to the country and seriously disturbed the normal order of social life. And according to the statistics of relevant auto insurance companies, among the car theft claims handled, the proportion of cars with anti-theft systems is significantly lower than that of cars without anti-theft systems.

The huge number of cars and the huge demand for cars in the future have opened up a huge market for car alarms. Along with the growth of car sales, the car alarm market has also maintained a growth momentum. Industry experts predict that with the continuous growth of domestic car ownership, the current market size of the automotive electronic anti-theft industry is close to 2 billion yuan, and will increase by 20% by 2016, and will reach a scale of nearly 10 billion yuan in the next 10 years . This good momentum provides a broad market space for domestic car anti-theft products.

Car anti-theft devices have undergone many updates. The original mechanical anti-theft device mainly achieves the purpose of anti-theft by locking the clutch, brake, accelerator or steering wheel, and gear shift. This type of anti-theft device has extremely low anti-theft performance, and is rarely used on the market now. The electronic anti-theft device achieves the purpose of anti-theft by locking the ignition or starting. It has a certain anti-theft function, but when it exceeds the effective distance or is left unattended, its anti-theft function will also be lost. The chip type digital anti-theft device is mostly used in the original anti-theft device of the car. Its basic principle is to lock the motor, circuit and oil circuit of the car with a password key, and the vehicle cannot be started without the key. Although this type of anti-theft device solves the anti-decoding function of the electronic anti-theft device, it still cannot get rid of the limitation of distance. The network anti-theft device refers to the functions of opening and closing the car door, starting the motor, stopping the car, positioning the car, and providing remote vehicle condition reports according to the requirements of the owner through the network. Although the network anti-theft device solves the disadvantages of distance limitation, the cost of purchase, use and maintenance for users is too high, which is unbearable and prohibitive for ordinary users.

All there is some kind of defect or deficiency in above-mentioned four classes of car alarms in function or design in a word. In addition, the car anti-theft devices currently on the market are all "report after the event", that is, the car owner is notified after the car theft accident occurs, and "in-the-fact report" cannot be achieved, that is, the thief can automatically report to the car owner as soon as the thief smashes or pries the car. The car owner immediately knows this situation and rushes to the scene as soon as possible, so as to alleviate or reduce the loss of the car owner and prevent the occurrence of car theft. Therefore, the automobile market needs a new type of intelligent anti-theft device with stronger functions, more humanization and lower cost - an intelligent anti-theft system for automobiles based on the Internet of Things. to achieve:

When being scratched by other vehicles, it can immediately report to the owner, so that it can grasp and know the condition of the car at the first time;

In the process of car theft, when the thief just uses a tool to pry or smash the door or glass window, he can perceive and send out an early warning message, and give a voice prompt to the thief to stop the theft immediately, so as to reduce further damage to the car. damage, and inform the owner in time;

When the temperature inside the car is too high or on the eve of spontaneous combustion, it will automatically warn and report to the owner;

Even in the event of a car theft, the whereabouts of the car can be automatically reported to the owner.

Contents of the invention

The present invention is aimed at above-mentioned problem, proposes a kind of automobile intelligent anti-theft system based on Internet of Things.

The technical solution adopted in the present invention is, an intelligent anti-theft system for automobiles based on the Internet of Things, which is composed of an intelligent anti-theft device and an anti-theft management system. The intelligent anti-theft device and the anti-theft management system perform data exchange through 3G wireless communication; the intelligent anti-theft The device consists of microwave sensor module, gyroscope sensor module, acceleration sensor module, magnetometer sensor module, temperature sensor module, smoke sensor module, system microprocessor MCU, GPS positioning module, voice warning module, 3G wireless communication module, LCD display module and other components; the system microprocessor MCU is respectively connected to a microwave sensor module, a gyroscope sensor module, an acceleration sensor module, a magnetometer sensor module, a temperature sensor module, a smoke sensor module, a GPS positioning module, a voice warning module, and a 3G wireless communication module and an LCD display module; the 3G wireless communication module and the GPS positioning module are respectively connected to the antenna.

Further, the anti-theft management system is an APP-based management software installed on a smart phone, which is used to realize remote control, management and setting of the intelligent anti-theft device.

Furthermore, when the car is stolen, the anti-theft management system can receive the relevant GPS positioning data sent by the intelligent anti-theft device, and then display the path, track and final geographic location of the car in real time based on these positioning data, Easy to track and find.

Furthermore, when the car is stolen, the intelligent anti-theft device automatically starts the voice alarm

display module.

Furthermore, when the intelligent anti-theft device detects that the temperature in the car exceeds the limit or there is smoke, it will automatically start the voice warning module.

Furthermore, the intelligent anti-theft device can send the abnormal information of the car to the anti-theft management system through the 3G wireless communication module, and the anti-theft management system will inform the car owner, so that the car owner can know the status of the car in the first time.

Furthermore, the intelligent anti-theft device can automatically call the police when the car is stolen, and inform the specific location of the car by voice.

Advantages of the present invention:

The present invention utilizes multiple sensors to sense in real time that the car is smashed, pryed, stolen or towed away; Light group early warning to reduce damage or injury to the car; when the car is smashed, pried, stolen or towed away, it will send a message to the anti-theft management system, and the anti-theft management system will notify the owner so that it can Know and grasp the status and situation of the car; when the car is smashed, pried, stolen or towed away, it will automatically call "110" and other alarm calls, and the specific location of the car will be informed by voice.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. Hereinafter, the present invention will be described in further detail with reference to the drawings.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.

Fig. 1 is a kind of structural block diagram of automobile intelligent anti-theft system based on Internet of Things of the embodiment of the present invention;

Fig. 2 is a structural block diagram of an intelligent anti-theft device of a vehicle intelligent anti-theft system based on the Internet of Things according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of a microwave sensor module of a vehicle intelligent anti-theft system based on the Internet of Things according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of a gyroscope and an acceleration sensor module of a vehicle intelligent anti-theft system based on the Internet of Things according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of a magnetometer sensor module of a vehicle intelligent anti-theft system based on the Internet of Things according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of a temperature sensor module of a vehicle intelligent anti-theft system based on the Internet of Things according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a smoke sensor module of an Internet of Things-based automobile intelligent anti-theft system according to an embodiment of the present invention;

Fig. 8 is a schematic diagram of a 3G communication module of a vehicle intelligent anti-theft system based on the Internet of Things according to an embodiment of the present invention;

Fig. 9 is a schematic diagram of a voice warning module of a vehicle intelligent anti-theft system based on the Internet of Things according to an embodiment of the present invention;

Fig. 10 is a schematic diagram of a system microprocessor of an intelligent car anti-theft system based on the Internet of Things according to an embodiment of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Referring to Fig. 1 and Fig. 2, as shown in Fig. 1 and Fig. 2, a car intelligent anti-theft system based on the Internet of Things is composed of an intelligent anti-theft device and an anti-theft management system, and the intelligent anti-theft device and the anti-theft management system communicate through 3G wireless Carry out data exchange; Described intelligent anti-theft device is made of microwave sensor module, gyroscope sensor module, acceleration sensor module, magnetometer sensor module, temperature sensor module, smoke sensor module, system microprocessor MCU, GPS positioning module, voice warning module, 3G wireless communication module, LCD display module, etc.; the system microprocessor MCU is connected with microwave sensor module, gyroscope sensor module, acceleration sensor module, magnetometer sensor module, temperature sensor module, smoke sensor module, GPS positioning module, A voice warning module, a 3G wireless communication module and an LCD display module; the 3G wireless communication module and the GPS positioning module are respectively connected to an antenna.

The anti-theft management system is APP-based management software installed on smart phones, and is used to realize remote control, management and setting of intelligent anti-theft devices.

When the car is stolen, the anti-theft management system can receive the relevant GPS positioning data sent by the intelligent anti-theft device, and then display the path, trajectory and final geographical location of the car in real time based on these positioning data, which is convenient for tracking and searching .

The intelligent anti-theft device automatically starts the voice warning module when the car is stolen.

When the intelligent anti-theft device detects that the temperature in the car exceeds the limit or there is smoke, it will automatically start the voice warning module.

The intelligent anti-theft device can send the abnormal information of the car to the anti-theft management system through the 3G wireless communication module, and the anti-theft management system will inform the owner of the car so that it can know the status of the car in the first time.

The intelligent anti-theft device can automatically dial an alarm call when the car is stolen, and inform the specific location of the car by voice.

System working principle:

The intelligent anti-theft device is placed under the driver's seat, and the sensor group is placed in the front seat, rear seat, and trunk. Microwave sensors use the Doppler principle, that is, when radio waves encounter objects during travel, they will reflect, and the frequency of the reflected waves will change with the moving state of the object. If the object is stationary, the frequency of the reflected wave is equal to the frequency of the emitted wave; if the object moves toward the emitting side, the reflected wave will be compressed and the frequency of the reflected wave will increase; otherwise, the frequency of the reflected wave will decrease Small. So the microwave sensor can accurately and quickly monitor the motion state of the object. When a thief smashes or pries the car glass or door with a tool, the glass or door will vibrate, and the microwave sensor can detect the change of the frequency of the reflected wave, thus realizing the automatic perception of whether the car has been smashed or pried. Gyroscope, accelerometer and magnetometer sensors can sense the change of the car's position in three-dimensional space in real time. Once the car is parked and in a static state, its three-dimensional space position will not change. Once it is scratched by other vehicles, it will be violently impacted or shaken, and its three-dimensional space position and acceleration will change. If the whole car is towed away or hoisted, its three-dimensional space position and acceleration will also change. Therefore, the aforementioned sensor cluster will detect very efficiently if the car has been smashed, pried, stolen or towed away. The temperature sensor monitors the temperature inside the car in real time. If it exceeds the rated value, it will give an early warning. The smoke sensor monitors whether there is smoke in the car in real time. Once stolen, smashed or towed away, the intelligent anti-theft device will automatically activate the voice warning module and loudly broadcast voice information such as "I have called the police, please stop the crime immediately!" injury or destruction. If it is detected that the temperature inside the car is too high or there is smoke, plus the former, the high-decibel siren will sound loudly, and the LED light group will emit a dazzling warning light, so that people nearby can rush to the scene as soon as possible after hearing or seeing it. In order to reduce the loss of the owner. At the same time, the intelligent anti-theft device displays the current monitoring situation through the LCD. In addition, the intelligent anti-theft device sends relevant abnormal information to the anti-theft management system through the 3G module, and the anti-theft management system then informs the car owner so that it can know and grasp the state and situation faced by the car in the first time. In addition, the intelligent anti-theft device can also automatically dial "110" and other alarm calls, and inform the specific location of the vehicle by voice. The car owner can also control, manage and set the intelligent anti-theft device through the anti-theft management system. If the car is stolen, it can be tracked by GPS global positioning to track and find the path, track and final location of the car.

The anti-theft management system is an APP-based management software installed on smart phones. Through it, the car owner can realize the remote control, management and setting of the intelligent anti-theft device.

Microwave sensor module:

Referring to Figure 3, as shown in Figure 3, the microwave sensor uses HB100. HB100 is a standard 10.525GHz microwave Doppler radar detector, which is composed of FET dielectric DRO microwave oscillator (10.525GHz), power divider, transmitting antenna, receiving antenna, mixer, detector and other circuits. The transmitting antenna emits microwaves in a directional direction, and is reflected when it encounters an object. The reflected wave is received by the receiving antenna, and then mixed with the oscillating wave in the mixer. The low-frequency signal after mixing and detection reflects the moving speed of the object. Compared with other detection methods, this detection method has the following advantages: (1) non-contact detection; (2) not affected by temperature, humidity, noise, airflow, dust, light, etc., suitable for harsh environments; (3) anti-corrosion Strong radio frequency interference capability; (4) The output power is small and does not pose any harm to the human body; (5) Long distance: the detection range exceeds 20 meters.

Gyroscope and accelerometer module:

Referring to Figure 4, as shown in Figure 4, the gyroscope and accelerometer sensor uses a highly integrated MPU6050, which integrates a 3-axis MEMS gyroscope, a 3-axis MEMS accelerometer, and an expandable digital motion processor DMP ( Digital Motion Processor). The MPU6050 uses three 16-bit ADCs for the gyroscope and the accelerometer respectively, and converts the measured analog quantities into digital quantities that can be output. In order to accurately track fast and slow motion, the measurement range of the sensor is user-controllable, the gyroscope can measure ±250, ±500, ±1000, ±2000o/second (dps), the accelerometer can measure the range of ±2, ±4, ±8, ±16g. MPU6050 adopts 400kHz I ² C interface to communicate with external MCU.

Magnetometer sensor module:

Referring to Figure 5, as shown in Figure 5, the magnetometer sensor uses the HMC5883 chip, which is a surface-mounted highly integrated module and a weak magnetic sensor chip with a digital interface, which is used in the field of low-cost compass and magnetic field detection . Including the most advanced high-resolution magneto-resistive sensor, with integrated circuits patented by Honeywell, including amplifiers, automatic degaussing drivers, offset calibration, and 12-bit analog-to-digital converters that can control the accuracy of the compass at 1o to 2o, and can be used in 5 milligauss resolution is achieved in a magnetic field of ±8 gauss. It uses I ² C bus to communicate with external MCU for data.

Temperature sensor module:

Referring to Figure 6, as shown in Figure 6, the temperature sensor uses DS18B20. DS18B20 is a digital thermometer that provides 9Bit to 12Bit Celsius temperature measurement accuracy and a user-programmable non-volatile with over temperature and low temperature trigger alarm function. DS18B20 adopts 1-Wire communication, that is, only one data line is used to communicate with external MCU. The temperature detection range of the sensor is -55°C to +125°C, which is sufficient to meet the requirements of this system. And each piece of DS18B20 has a unique 64Bit serial number. In this system design, 12Bit is adopted, and the temperature detection accuracy reaches ±0.0625°C.

Smoke sensor module:

Referring to Figure 7, as shown in Figure 7, the smoke sensor uses RE46C190, which is a CMOS photoelectric smoke detector IC with low power consumption and low voltage. All necessary functions of a photoelectric smoke detector are provided using only a few external components. The chip uses an internal oscillator to strobe the power supply to the smoke detection circuit every 10 seconds to keep standby current to a minimum. When smoke is detected, the chip increases the detection rate to verify that an alarm condition exists. A high-gain mode is also provided for key chamber testing.

Communication module:

Referring to Figure 8, as shown in Figure 8, the 3G module SIM5218A with GPS positioning function is selected due to the consideration of the function and integration of the entire system. The module adopts 70-pinSocket connector, supports WCDMA2100M/1900M/850M, supports UART and USB2.0 high-speed data read and write operations, and has the functions of connecting to the Internet anytime and anywhere, sending and receiving short messages, transmitting voice messages, and GPS positioning. Considering the data size and baud rate during communication, the serial port communication can fully realize the read and write operation control operation of the module. The GPS of this module adopts the standard NMEA-0183 data format, so it only needs to read the relevant information data - longitude, latitude, altitude and time information.

Voice alarm module:

Referring to Figure 9, as shown in Figure 9, the voice alarm uses the SX06680 chip. The voice chip has internal 9BitADC and 9BitDAC, 4 I/O ports, and has 10K, 8K, 6K sample recording and music playback functions. The maximum recording and playback files are 255 segments. Its working voltage is 2.2-4.5V, playback current: 25-80mA, standby current: <3uA.

System microprocessor:

Referring to Figure 10, as shown in Figure 10. Since the intelligent anti-theft device is powered by a battery, energy saving is a very critical performance indicator. So the main controller of the system adopts MSP430F149. The chip is a low power consumption, highly integrated, high performance, embedded microprocessor, especially suitable for battery applications or handheld devices. MSP430F149 includes 1 hardware multiplier, 48 I/O ports, 1 analog comparator, 2 timers with capture/compare registers, 8-way 12-bit A/D converter, on-chip watchdog timer , 2 hardware serial communication interfaces, 60KB of FlashROM and 2KBRAM, especially suitable for designing on-chip systems. Its circuit design is shown in Figure 10.

The invention utilizes various sensors to sense in real time that the car is smashed, pried, stolen or towed away; when the car is smashed, pried, stolen or towed away, it will automatically broadcast voice, siren sound loudly, LED lights Group early warning to reduce damage or injury to the car; when the car is smashed, pried, stolen or towed away, it will send a message to the anti-theft management system, and the anti-theft management system will notify the owner so that it can be detected in the first time Know and master the state and situation that the car is facing; when the car is smashed, pried, stolen or towed away, it will automatically call "110" and other alarm calls, and the specific location of the car will be informed by voice.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (7)

1. A car intelligent anti-theft system based on the Internet of Things, is characterized in that, is made up of intelligent anti-theft device and anti-theft management system, and described intelligent anti-theft device and anti-theft management system carry out data exchange by 3G wireless communication; Described intelligent anti-theft device consists of Microwave sensor module, gyroscope sensor module, acceleration sensor module, magnetometer sensor module, temperature sensor module, smoke sensor module, system microprocessor MCU, GPS positioning module, voice warning module, 3G wireless communication module, LCD display module, etc. The system microprocessor MCU is respectively connected with a microwave sensor module, a gyroscope sensor module, an acceleration sensor module, a magnetometer sensor module, a temperature sensor module, a smoke sensor module, a GPS positioning module, a voice warning module, a 3G wireless communication module and an LCD A display module; the 3G wireless communication module and the GPS positioning module are respectively connected to the antenna. 2. The automobile intelligent anti-theft system based on the Internet of Things according to claim 1, wherein the anti-theft management system is based on APP, management software installed on a smart phone, and is used to realize the remote control of the intelligent anti-theft device. Control, management and settings. 3. The car intelligent anti-theft system based on the Internet of Things according to claim 1, wherein when the car is stolen, the anti-theft management system can receive the relevant data of GPS positioning sent by the intelligent anti-theft device, and then according to these positioning data , displaying the path, trajectory and final geographic location of the car in real time, which is convenient for tracking and searching. 4. The automobile intelligent anti-theft system based on the Internet of Things according to claim 1, wherein the intelligent anti-theft device automatically starts the voice warning module when the automobile is stolen. 5. The intelligent car anti-theft system based on the Internet of Things according to claim 1, wherein when the intelligent anti-theft device detects that the temperature in the car exceeds the limit or there is smoke, the voice warning module is automatically activated. 6. The automobile intelligent anti-theft system based on the Internet of Things according to claim 1, wherein the intelligent anti-theft device can send the abnormal information of the automobile to the anti-theft management system through the 3G wireless communication module, and the anti-theft management system will notify The owner of the car, so that it can know the condition of the car in the first time. 7. The intelligent car anti-theft system based on the Internet of Things according to any one of claims 1-6, wherein the intelligent anti-theft device can automatically dial an alarm call when the car is stolen, and inform the specific location of the car by voice.