ACEINNA Launches Triple-Band RTK/GNSS Receiver for Autonomous Navigation Systems

January 08, 2020 by Lisa Boneta

The OpenRTK330L is said to deliver cm-level accuracy during GNSS outages and is fully customizable with open-source algorithms.

ACEINNA recently announced OpenRTK330L, a triple-band, real-time kinematic/global navigation satellite systems (RTK/GNSS) receiver with a built-in triple-redundant inertial sensor.



The OpenRTK330LI. Image used courtesy of ACEINNA 

ACEINNA describes OpenRTK30L as a compact navigation solution that meets the challenging performance, reliability, and cost requirements of markets including, automotive, robotics, drone, construction, and agriculture systems. 


Features of OpenRTK330L 

The (PDF) OpenRTK330L is said to deliver cm-level accuracy during GNSS outages. The device also offers Extended Kalman filtering, which provides accurate absolute position, attitude, heading, velocity, 3D rotational rate, and 3D linear acceleration.

During a full GNSS denial, a precise 2 Degree/House IMU offers ten to thirty seconds of localization. According to ACEINNA, this may allow autonomous system developers to safely deliver accurate localization and position capabilities in vehicles.


OpenRTK330LI mounted on an evaluation board

ACEINNA’s latest OpenRTK330LI mounted on an evaluation board. Image from (PDF) ACEINNA 


OpenRTK2330L offers an embedded Ethernet interface for direct connection to GNSS correction networks and a CAN bus interface for simple integration into existing vehicle architectures.

Additionally, the multi-band GNSS receiver can monitor all global constellations and simultaneously track up to 80 channels. The module has RF and baseband support for L1, L2, and L5 GPS bands. 


Inertial Measurement Units

ACEINNA asserts that its IMU solutions are fully customizable with open-source algorithms. The IMU and dead reckoning function has a total of 9 accelerometer and 9 rate gyro channels based on ACEINNA’s triple-redundant 6-axis IMU array.

More specifically, the IMU sensor array has a triple-redundant, 3-axis MEMS angular rate sensor, and a triple-redundant, 3-axis MEMS accelerometer. The triple-redundant IMU array allows the system to recognize and utilize only valid sensor data, which ensures protection limits and certifiability under ISO26262 standards.


Functions and Applications

There are several IMUs tailored to different functions and applications. 


Open Navigation Platform

ACEINNA's Open Navigation Platform, which supports OpenRTK330L, allows developers to code, compile, dub, simulate, and analyze results. Image used courtesy of (PDF) ACEINNA 


The triple-redundant 6 Degree-of-Freedom (DOF) IMU, an open-source surface mount, is ideal for sensitive, high-volume applications related to safety—namely those that require fault tolerance. Embedded IMU’s have 9 DOF to support many applications, including inertial navigation systems (INS), attitude and heading reference systems (AHRS), vertical gyro, and others.

Lastly, the open-source rugged sealed IMU is a standalone sealed, rugged 9 DOF inertial measurement system ideal for construction, agricultural, and other vehicle applications.


Additional Features and Details 

OpenRTK330L is supported by ACEINNA’s Open Navigation Platform, which enables custom embedded application development. OpenRTK330L module is accessible to developers of autonomous solutions, including GNSS receiver measurement data, IMU measurement data, and all interfaces.

The GNSS receiver supports GPS (L1 C/A, L2C and L5), GLONASS (L1OF, L2OF), BeiDou (B1I, B2I), GALILEO (E1, E5a, E5b, E6), QZSS (L1 C/A), and NAVIC.  


GNSS/RTK inertial navigation system

GNSS/RTK inertial navigation system. Image (modified) used courtesy of (PDF) ACEINNA

The ACEINNA OpenRTK330L hardware includes Ethernet, UART, SPI, and CAN interfaces. The operating temperature range is -40°C to +85°C and qualifies to standard automotive shock and vibration levels. 

The OpenRTK330L can be ordered in either in industrial or automotive grades. Developer kits are available with the OpenRTK33LI mounted on an evaluation board, ST-Link JTAG pod, L1/L2/L5 GNSS antenna, and USB cable.