Inertial Measurement Unit runs open-source code

May 26, 2021 // By Christoph Hammerschmidt
Inertial Measurement Unit runs open-source code
MEMS-based solution provider Aceinna Inc. has developed the OpenIMU335RI, a rugged inertial measurement unit (IMU) with CAN and RS232 interfaces.

The new IMU delivers increased performance in key acceleration and gyro specifications over its predecessors. The vendor promises best in class performance, including 1.3 degrees per hour bias instability (BI) and 0.1 degrees per root hour Angle Random Walk, making it ideal for 3DMG (3 Dimensional Machine Guidance), 3DMC (3 Dimensional Machine Control) and other applications requiring high performance inertial measurements.

Like other third-gen Aceinna products, the OpenIMU3334RI is triple redundant, consisting of three independent 3-Axis Accelerometers and 3-Axis Gyros. The redundancy in these products provides increased performance in key acceleration and rate sensor characteristics, and increased reliability and equipment uptime in the field. Aceinna has implemented a proprietary algorithm that detects a failing sensor and automatically and seamlessly eliminates it from the solution, allowing equipment to continue normal operation using the remaining sensors.

OpenIMU335RI is packaged in a rugged sealed housing with an Ampseal 16, 6 position connector. It includes CAN J1939 and RS232 interfaces for network connectivity. The miniature housing is formed using an over-molding process delivering a completely sealed solution which prevents any possible water ingress and is durable under tough environmental conditions. It is specified to work from an unregulated 9 V – 32 V supply and is fully qualified for use in 12 V and 24 V vehicle systems. A 3D magnetic field sensor is available as an option for applications requiring 9-DOF IMUs.

The OpenIMU335RI uses a powerful ARM M4 CPU with a Floating Point Unit. The module runs the OpenIMU open-source stack that includes an optimized full-state Kalman Filter for Attitude and GPS-Aided Position-Velocity-Time (PVT) measurement. For developers, the open-source environment allows for algorithm optimization for specific vehicle or application dynamics and custom messaging. A free development tool-chain based on Microsoft VS Code supports PC, MAC, and Ubuntu. Data logging and visualization are supported with Aceinna Navigation Studio, a free web based graphical user interface.

 

https://www.aceinna.com/inertial-systems/OpenIMU335RI

 


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