IndyCar to deploy new ADR and earplug accelerometers for 2021

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IndyCar will adopt two new safety devices this season, which will provide detailed data about the forces on the cars and drivers during a crash. The new Accident Data Recorders (ADR) and Ear Plug Accelerometers (EPA) will be provided by EM Motorsport, a supplier of electronic safety devices, sensors and custom-built data systems to the motorsport industry.

The ADR uses internal accelerometers and gyros as well as a controller area network (CAN) interface to capture ‘at the scene’ accident data to aid post-event analysis and safety research. Furthermore, EM says that the ADR is smaller and lighter than the unit it replaces in the series.

The EPA is a small device with a three-axis accelerometer that fits inside each of the driver’s earplugs to obtain crucial information about a driver when they are involved in an accident. This includes the driver’s radio communications as well as data from the accelerometer that detects the speed and amount of movement of a driver’s head in an accident.

IndyCar says it has moved to use EM Motorsport’s ADR4 and EPA devices after successful tests during the 2020 racing season.

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Lawrence has been covering engineering subjects – with a focus on motorsport technology – since 2007 and has edited and contributed to a variety of international titles. Currently, he is responsible for content across UKI Media & Events' portfolio of websites while also writing for the company's print titles.

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