TDK Corp. announced the launch of InvenSense Coursa Drive software, an inertial-aided positioning solution for autonomous vehicle (AV) platform developers. A high-performance extension of the InvenSense Positioning Library (IPL), Coursa Drive is designed to enhance inertial-only vehicle positioning to <0.2% of distance traveled.

Coursa Drive’s inertial navigation system (INS) calibrates using absolute position inputs from either high-accuracy GNSS receivers or from perception-based systems (camera, radar, LiDAR) with HD maps. In real time, Coursa Drive reportedly provides high-rate, 100 Hz delta positions and orientation to the AV system, complementing the lower-rate position references from GNSS and perception systems. For improved system fault-tolerance, Coursa Drive can provide decimeter position precision for short periods when the GNSS or perception systems are uncertain or unavailable.

For non-real-time applications such as HD map creation and maintenance, TDK says Coursa Drive’s offline mode reprocesses INS data at two to three times higher accuracy than real-time mode, providing HD map companies alternative position references to verify HD map accuracy, even without GNSS, for up to 60 seconds.

“Coursa Drive delivers vehicle dead reckoning accuracy equivalent to high-end systems costing thousands of dollars,” said Mike Housholder, Senior Director of TDK InvenSense Location Software and Services. “Our cost-effective software solution will help AV platform and Tier 1 vehicle manufacturers scale beyond prototype vehicles to high-volume mass production.”

Coursa Drive is designed to provide AV platform developers with maximum flexibility for system integration. The solution is platform agnostic and can operate on Cortex-M4F-class microcontrollers, or higher, and supports most dual-frequency GNSS receivers. The Coursa Drive API specifications are available upon request.

Coursa Drive is thoroughly tested and characterized using the InvenSense line of automotive-grade IMUs, including the IAM-20680 and IAM-20680HP, as well as several industrial grade IMUs. Coursa Drive is currently available for select early partners and customers.

The IAM-20680 and IAM-20680HP are part of a new line of automotive high-accuracy microelectromechanical sensors (MEMS) that also include the IAM-20380 and IAM-2038.

The IAM-20680, with an operating range of -40°C to 85°C, and a small 6-axis automotive-qualified sensor, features 16-bit accelerometers and 16-bit gyroscopes.

The IAM-20680HP is a high-performance version of the IAM-20680, with an operating range of -40°C to 105°C, high gyroscope and offset thermal stability, as well as pin, package, and register compatible with the IAM-20680.

The IAM-20380, with operating range of -40°C to 85°C, is an automotive-qualified gyroscope fully compatible (pin, package, register, and software) with a 3-axis automotive accelerometer (IAM-20381) and an automotive-qualified 6-axis device (IAM-20680).

IAM-20381, with operating range of -40°C to 85°C, is an automotive-qualified 3-axis accelerometer fully compatible (pin, package, register, and software) with a 3-axis automotive gyroscope (IAM-20380) and an automotive-qualified 6-axis device (IAM-20680).

TDK’s family of automotive solutions can help enhance the absolute position of a vehicle in GNSS- and GPS-denied environments, such as tunnels, parking garages, and urban canyons. A vehicle’s navigation system can use the output of the 6-axis automotive-qualified IAM-20680HP or of the IAM-20680 to improve estimate of the position, direction, and speed of a vehicle when the satellite signal is deteriorated or non-existent as well as to improve the quality of the position estimation when the satellite signal is strong. The product family measures up to 16 g acceleration and up to 2000 dps (degrees per second). The low noise helps the car navigate in a straight line, while low sensitivity error keeps the car turning correctly. The solutions’ superior temperature stability also enables navigational driving through the most challenging environments.

The flexibility of the family of TDK automotive sensors is intended to allow customers to design with the IAM-20680; or, if navigating in very high temperature environments and for systems where cooling is weak or not available, the IAM-20680HP may be used. If cost efficiency is the most important consideration, the IAM-20380 or IAM-20381 is the suitable choice. TDK’s new family of automotive-qualified sensors can be interchanged without the need to redesign hardware or software.

For additional information, visit