Abstract
Damages of different kinds that can be inflicted to a parked car. Among them, loosening of the car wheel bolts is difficult to detect during normal use of the car and is at the same time very dangerous to the health and life of the driver. Moreover, in patents and publications, only little information is presented about electronic sensors available for activation from inside of the car to inform the driver about the mentioned dangerous situation. Thus, the main aim of this work is the proposition and examination of a sensing device using of a wireless accelerometer head to detect loosening of wheel fixing bolts before ride has been started. The proposed sensing device consists of a wireless accelerometer head, an assembly interface and a receiver unit. The assembly interface between the head and the inner part of the rim enables the correct operation of the system. The data processing algorithm developed for the receiver unit enables the proper detection of the unscrewing of bolts. Moreover, the tested algorithm is resistant to the interference signals generated in the accelerometer head by cars and men passing in close distance.
Highlights
Owning a car is associated with ensuring the correct preparation for driving, driving the car and parking it
The assembly interface and wireless head construction are crucial for proper signal measurement
The electronic circuit construction including assembly interface provides the possibility of car wheel monitoring in real environment with the presence of electromagnetic noise
Summary
Owning a car is associated with ensuring the correct preparation for driving, driving the car and parking it. A preparation for driving is related to the condition of the car and driver. The preparation of the car includes checking the technical condition of the car and the supply of adequate technical fluids, including brake fluids [1] and fuel of the correct quality [2]. The preparation of the car driver, in the most simplified terms, consists of the approval of its functional state [3,4]. The mentioned preparations could be supported by the use of independent sensors and systems. Correct technical conditions while the car is driven are assured by an onboard diagnostic system called OBD [5]
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