In the case of u-blox’s NEO-M8U and EVA-M8E module, a raw sensor data stream that contains that from the 3-axis gyro, the 3-axis accelerometer and the module’s temperature sensor is available at a rate of 100 Hz. This data is available to the host application via the UART or I2C compatible interface and could be used to profile driver behaviour, pay-as-you-drive insurance applications or for accident reconstruction.
When contemplating embarking on a UDR-based design, automotive electronics engineers are recommended to carefully research the capabilities of a UDR module and the development tools that might aid the prototyping process and speed time to market. Key considerations will include the operating temperature range, certification to automotive quality standards such as AEC-Q100 and conformance to standards such as ISO 16750 that stipulate the extremes of operating conditions likely to be encountered within a road vehicle. Supporting the initial concept prototyping will be the need for an evaluation kit or reference design that will quickly allow experimenting, for example, with different antenna positions, evaluate different module functionality and visualise overall GNSS and sensor performance.
Untethered dead reckoning delivers a level of vehicle-based navigation previously not possible. Whether driving through tunnels, city areas with lots of tall buildings or parking in a multi-story covered car park, UDR delivers a continuous navigation experience without the need to be attached to the vehicle’s own network and can continue to navigate through short periods of complete signal loss.
About the author:
Florian Bousquet is Market Development Manager at u-blox Holding AG, Thalwil, Switzerland.