Various reports [19-20] clearly show that adverse road conditions and tire defects play a major role in road traffic accidents. As a consequence, there is urgent need, from Vorinostat HDAC3 a traffic safety point-of-view, for intelligent http://www.selleckchem.com/products/PD-0332991.html tires with a warning system for road conditions, optimizing control on poor surfaces, and a tire defect detection system that measures tire deformation, in addition to a TPMS.The key technologies for the intelligent tires are sensors and data transmission methods. In the case of installing sensors to measure strain applied to a tire, many problems have to be considered. First, because the stiffness of the tire rubber is very low, the conventional foil strain gages designed for metal or plastic materials are not suitable.
The high stiffness difference may cause debonding of sensors from tire Inhibitors,Modulators,Libraries rubber or degrading performance of the tire because sensors themselves inhibit the deformation of the tire. Second, it is spatially impossible that large-sized sensors are installed in a special environment like the interior space of the tire. Moreover, it is economically difficult to use Inhibitors,Modulators,Libraries expensive sensors because tires are comparatively inexpensive products.In terms of the data transmission, when sensors are installed inside the tire, wireless monitoring is indispensable. Although a slip ring can be used in measurements for rotating objects in laboratory testing, abrasion of the brush and rings may occur and the slip ring does not have a long operational life.
Moreover, to activate the sensor, Inhibitors,Modulators,Libraries it is necessary to install a battery in the tire.
The battery, however, has a limited life and it is difficult for tire users to replace the battery inside the tire. Therefore, energy harvesting Inhibitors,Modulators,Libraries or energy scavenging that converts mechanical vibration of tires to electric power has been researched to eliminate the need for battery replacement in recent years. Inhibitors,Modulators,Libraries Passive wireless sensors that do not require batteries have also been researched. The passive wireless sensor omits batteries and an energy harvesting system and thus downsizes the instruments installed in the tire. The sensor also has the advantages of Inhibitors,Modulators,Libraries decreasing fuel consumption and off-balance problems of the tire due to sensor installation.
This review therefore discusses two key technologies of intelligent tires: Inhibitors,Modulators,Libraries 1) tire sensing technology that involves a TPMS and is used in developing an advanced Inhibitors,Modulators,Libraries intelligent tire with a tire deformation, wheel loading, or friction measurement system and 2) a system for wireless data transmission between tires and a vehicle that involves Dacomitinib active and passive wireless selleckbio methods and energy harvesting.2.?Tire pressure Brefeldin_A monitoring systems2.1. Indirect pressure monitoringA simple TPMS method is based on indirect measurements and fuses information http://www.selleckchem.com/products/carfilzomib-pr-171.html from several different physical sensors to compute tire pressure. Persson et al.