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Energy Harvesting Techniques for Future IoT Applications
Published in Indu Bala, Kiran Ahuja, Harnessing the Internet of Things (IoT) for a Hyper-Connected Smart World, 2023
N. Vithyalakshmi, G. S. Vinoth, H. D. Praveena, P. Avirajamanjula
Due to the rapid growth of the automobile industry, the vehicle running on the roads are increasing day by day. And the numbers of accidents also increase multifold. One among the reasons for road accidents is due to the inflation or burst of tires. Tire burst is a primary botheration for drivers, as it is difficult to predict. The main cause is due to irregular tire pressure and high tire temperature. Inflation pressure is one huge factor that determines performance, impacts tire’s speed, and load capacity, cornering power, life service, handling response and overall its protection. Low inflation causes an increase in fuel consumption and sustained will cause structural impairment. TPMS installed in vehicles will measure the inflated tire pressure or change in the tire pressure for a period of time and transmits respective information to the driver when the vehicle is moving. Thus, accidents can be avoided if tire pressure is monitored frequently while driving. Also, TPMS will require changing or maintaining sensors owing to damage or battery fault. Hence to provide less monitoring and battery free sensor application growing interest is shown to use power harvesting techniques to energize TPMS as presented in Figure 10.22.
Tire Pressure Monitoring Systems: A Case Study in Automotive Mechatronics
Published in Satya Bir Singh, Prabhat Ranjan, A. K. Haghi, Applied Mechatronics and Mechanics, 2020
The second option is based on the pressure sensor (also referred to as direct TPMS). This TPMS system makes use of a pressure sensor which is installed in each tire of the vehicle to measure the tire pressure and that data is shown in driver’s display and monitors the pressure of each tire. These days many cars are fitted with tire pressure sensors. Rapid miniaturization of sensors is an important development in the deployment of TPMS. The four sensors are connected in a wireless sensor network and the tire pressure information is displayed wirelessly. The main goal is to reduce the power consumption of the wireless sensors. This chapter deals with only direct TPMS as described in the next section.
Chassis systems
Published in Tom Denton, Automobile Mechanical and Electrical Systems, 2018
A tyre pressure monitoring system (TPMS) is a safety feature that continually monitors a vehicles’ tyres and alerts the driver to changes in tyre pressure. The changes in pressure can be detected by either direct or indirect means. Both methods will, as a minimum, illuminate a warning light on the vehicle dashboard display and sound an audible alert when 25% deflation has occurred. Early TPMS were introduced as an option on high-end luxury vehicles as early as the 1980s, although it wasn’t until the year 2000 that it was first fitted as a standard feature.
Robust estimation method of tire torsional resonance frequency to detect decrease in tire inflation pressure
Published in Vehicle System Dynamics, 2022
Pressures in pneumatic tire below the appropriate level degrade the handling performance of the vehicle as well as tire life and fuel economy. Therefore, maintaining the tire pressure at an appropriate level is important not only for the economic aspect but also for the safety of the driver. However, it is difficult to distinguish visually whether the tire pressure is low or not, even if the pressure in pneumatic tire is reduced by 30–40 percent compared to normal pressure. Indirect tire pressure monitoring system (TPMS) helps the driver to monitor the tire pressure in real time and warns the driver when the tire pressure is below normal pressure. In this respect, TPMS is mandated in a variety of countries, as shown in Table 1.