Melexis, a global microelectronics engineering company, has unveiled the MLX91805 smart tire sensor to help OEMs prepare for the forthcoming extension of mandatory tire-pressure monitoring to include commercial vehicles and to enable future generations of smart tires.
Specially designed to be embedded in the tire, unlike current rim-mounted TPMS sensors, the MLX91805 TMS integrates an 800g XZ-axis accelerometer that senses up to 10,000 samples per second. It also integrates a high-accuracy pressure sensor as well as temperature and voltage sensors.
The MLX91805 is suited to tires for commercial vehicles, including heavy-duty, and passenger cars. With new EU regulations on tire-pressure monitoring for heavy-duty commercial vehicles intended to come into force in 2022-2024, its multiple sensors help ensure compliance and provide extra information, such as loading, that can extend tire life and boost fuel economy and safety.
Integrating a low-power 16-bit microcontroller and 315/433 MHz RF transmitter that draws just 5mA at 5dBm output power, and with an extremely low 90nA sleep current, the MLX91805 can run from a tiny battery for the life of the tire. In addition to built-in diagnostics and fault detection, a math coprocessor allows fast and energy-efficient Digital Signal Processing (DSP). Further assisting the development of smart tires, the MLX91805 comes with Melexis’ Library to help application-level software capturing and interpreting key information like accelerometer signals of the tire footprint area.