Scientists invented a low-cost printed sensor that monitors car tires in real time and alerts the driver when tire rubber becomes thin and needs to be replaced. The device will improve the car's safety while improving vehicle performance and reducing fuel consumption.
Researchers at Duke University in the United States used metal carbon nanotubes to build this new sensor - a tiny cylinder of carbon nanometers in diameter that is one-billionth of a meter in diameter that tracks millimeter tread depth variations with 99% accuracy .
Franklin, an associate professor at Duke University, points out that in today's automotive sensor and detection technologies, very little data is collected from the only part of the road the vehicle really touches. This technique relies on the mechanics of the interaction of an electric field with a metal conductor. The heart of the sensor is the application of one voltage to the other by placing two small and very close conductive electrodes, creating an electric field between the electrodes.
According to the width of the product to set the grid to pick up many sensors to cover the tire to detect tire unevenness, wear and other information, although the sensor can be made of a variety of materials and methods, but researchers hope that by exploring the sensor size and structure to the substrate and ink Different variables of material to optimize performance.
Finally, it is found that the best effect can be obtained by printing the metal carbon nanotube electrode on the flexible polyimide film. In addition to providing the best results, metal carbon nanotubes are also durable and resistant to the harsh environment of tires.
These sensors can be aerosol spray printed on most objects, even inside the tire. Although it is not yet certain that direct printing is the best method of manufacture, Franklin said the cost of the sensor will be well below every penny, once it is mass-produced.
Duke also hopes to explore printed sensors for other automotive applications, such as labels that keep the thickness of the brake pad or the pressure inside the tire.
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