Method and device for anti-theft detection of automobile wheels
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A detection method and automobile technology, applied in the direction of wheels, transportation and packaging, wheel covers, etc., to achieve the effects of strong system robustness, easy transplantation, and high real-time work
Active Publication Date: 2019-03-12
SHANGHAI JIAOTONG UNIV
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In addition, the sensor itself will also generate some noise. How to filter the noise of the sensor, avoid interference signals such as body shaking, and effectively detect knocking signals is a challenging problem.
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Embodiment 1
[0055] like figure 1 Shown, a kind of automobile wheel anti-theft detection method uses an acceleration sensor and a single-chip microcomputer, and its steps are as follows:
[0056] Step 100 The acceleration sensor collects the acceleration signals of the car in the horizontal front-back direction, the horizontal left-right direction, and the direction perpendicular to the horizontal plane. The single-chip microcomputer collects the data from the acceleration sensor and processes the data. After parking, the wheel anti-theft detection system is automatically activated , start the car tilt signal detection.
[0057] Step 200 initializes the acceleration sensor and the single-chip microcomputer of the MSP430 chip system, and sets the signal acquisition frequency as 40Hz. The initialization process includes the setting of the system clock, data acquisition control timer and communication resources; when the initialization is completed, the system starts the timer and starts data...
Embodiment 2
[0083] An automobile wheel anti-theft detection device, comprising an acceleration sensor and a single-chip microcomputer, the acceleration signals collected by the acceleration sensor in the horizontal front-back direction, the horizontal left-right direction and the three directions perpendicular to the horizontal plane are used as the acceleration signals in three directions, and it is characterized in that, It includes a reading module, a noise reduction module, an angle signal conversion module, a storage module, a first calculation module, a first comparison module, a second calculation module, a second comparison module, a third detection module and an alarm module.
[0084] After parking, the wheel anti-theft detection system is automatically activated, and the vehicle tilt signal detection is started. The reading module reads the acceleration signals collected by the acceleration sensor in the three directions of x, y, and z, and x represents the horizontal front and re...
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Abstract
The invention provides a detecting method and device for car wheel burglary prevention and relates to the field of car electronics. The detecting method and device for car wheel burglary prevention are used for detecting car inclining signals in a car wheel burglary scene. The detecting method comprises the steps that a wheel burglary prevention detecting system is started, and an acceleration sensor and a single chip microcomputer are initialized; an acceleration signal value is collected and subjected to de-noise processing, an acceleration signal is converted into an angle signal, the generated angle signal is stored, and a car-shaking signal value is calculated; the car-shaking signal value and a car static threshold value are compared, a car angle changing value is calculated according to the judging result; the car angle changing value and an angle waning threshold value are compared, a car angular speed and a static angular speed threshold value are compared according to the judging result; and an alarm gives an alarm according to the judging result. The detecting method and device for car wheel burglary prevention have the advantages that the system robustness is good, the filtering effect is good, the operation processing expense is small, the real-time capability is high, and the detecting method and device for car wheel burglary prevention are suitable for low-performance low-energy-consumption cheap processing chip operation, and the detecting device for car wheel burglary prevention is suitable for being integrated at a low-cost car safety monitoring system.
Description
technical field [0001] The invention relates to the field of automobile electronics, in particular to an automobile wheel anti-theft detection method and device, which are used for automobile anti-theft monitoring. Background technique [0002] According to statistics from the Traffic Management Bureau of the Ministry of Public Security, as of the end of 2015, the number of motor vehicles in my country reached 279 million, including 172 million cars. At present, cars have become an increasingly common means of transportation in people's daily lives, and car theft crimes have become a social issue. Sustained focus. Among them, car wheel theft is a common crime and has become an important factor threatening the safety of personal property. At present, automobile anti-theft technology mainly includes mechanical anti-theft device, chip anti-theft device, electronic anti-theft device, GPS satellite positioning automobile anti-theft system network type anti-theft device and so on....
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