The car tires used to be just rubber on a steel wire frame. For a few years now, every piece of equipment has become more and more advanced and more and more sensors appear in it. In addition to pressure sensors, we will soon have additional sensors that will tell us the conditions of the road.
Tire engineers from Bridgestone have developed a new type of sensor called Contact Area Information Sensing, which is installed on the inside of the tire, to monitor its interaction with the surface, providing drivers with real-time data on road conditions.
Technology has been developing since 2011 and was presented at the Frankfurt Motor Show at the time, and its first generation used a load-sensing sensor and lateral forces acting on the tire. A little later, CAIS 2 appeared, which was equipped with additional acceleration sensors that were used to determine the condition of the pavement. In 2014, Bridgestone showed CAIS 3, the latest generation of system, plus the ability to monitor the condition of the tire itself.
Now the Bridgestone management has announced the commercialization of CAIS 2, which it intends to use in passenger car and truck tires. They will be equipped with an accelerometer attached to the inner wall of the tire, which will be powered by an electromagnetic generator.
The solution will monitor high frequency vibrations on the tire and then transmit information via radio to the central module installed in the vehicle. There, using special algorithms, will be translated into information about current road conditions.
In this way, the driver will know in real time whether the road surface is moving, dry, wet, wet, covered with fresh snow, snow or ice. This is undoubtedly a very useful solution, as it is often difficult at first sight to notice that the surface can be slippery, and particularly tricky is the so-called. Black ice.