CAN Bus IMU for Autonomous Car Safety - ACEINNA Whitepaper
ACEINNA whitepaper regarding CAN Bus technology and how it can be integrated with IMU sensors to provide a high level of safety and navigational accuracy for a wide variety of autonomous vehicles, including cars, robots, agricultural and heav
How CAN bus connected IMUs Improve Safety & Navigation Accuracy for Autonomous Cars, Construction and Heavy Machinery
ACEINNA today announced the availability of a new whitepaper for engineers involved in developing autonomous car navigation, safety and communication systems. This new whitepaper explains WHY and HOW to integrate Inertial Measurement Unit sensor technology with CAN communications in a variety of vehicle types and classes.
CAN (Controller Area Network) is a robust and mature vehicle bus standard that allows devices to communicate with each other. Now over thirty years old, CAN is used on virtually all passenger vehicles as well as heavy equipment. As autonomous vehicles require many sensors to reliably exchange data, CAN is now recognized as an excellent interface choice for a variety of low and medium speed vehicle sensors such as the Wheel Speed Sensor, Steering Angle Sensor, Throttle Position Sensor, and the Inertial Measurement Unit.
Inertial Measurement Units (IMU's) consist of three axes of acceleration plus three axes of angular rate measurements that are the linear and rotational components of a vehicle respectively. Not to be confused with single chip accel/gyro integrated circuit solutions, a temperature compensated and calibrated IMU module delivers nearly zero bias drift over temperature and operating conditions. An IMU may also include three axis of magnetic field measurement used for electronic compass functionality.
In an autonomous vehicle, CAN is used to pass IMU data to other sensors as well as the main vehicle control i.e., the vehicle's brain. It is possible to use the CAN bus to share IMU data with up to 20 other vehicle subsystems. This can include LIDAR, Camera, Radar as well as primary compute engines all benefitting from one centrally mounted high-performance IMU on the vehicle.
A CAN bus based IMU application can also listen to other messages on the bus. This is a quite powerful feature. For example, the Dynamic Tilt algorithm could be performance enhanced by listening to messages such GPS/INS for precise localization and Odometer or Vehicle Speed to better compensate for the influence of linear acceleration on dynamic roll and pitch.
This whitepaper cites two "out of the box" example applications and how to develop custom applications —
This new CAN Bus whitepaper is available as a free download at https://www.aceinna.com/
ACEINNA Inc., headquartered in Andover, Massachusetts, provides leading edge MEMS-based sensing solutions that help our customers improve the reliability, cost, features, and performance of their end products and equipment. In 2017, ACEINNA was spun off from MEMSIC which is now a part of a public company. ACEINNA has been developing MR based sensor and magnetic thin film manufacturing for 15 years. ACEINNA provides a proven technology platform with over 300M MR based electronic compass units that have been integrated into mobile devices, automotive and industrial applications. The company has manufacturing facilities in Wuxi, China, and R&D facilities in San Jose CA, Andover MA, and Chicago IL.
FOR MORE INFORMATION
ACEINNA Inc., One Tech Drive, Suite 325, Andover, MA 0180
Tel: 978-965-3200 Fax: 978-965-3201
Mark Shapiro, SRS Tech-PR