data_logger

README

Data Logger

This is going to a data logger for track days and trips. It is currently based on a Beaglebone Black with a SparkFun 9 Degrees of Freedom sensor stick connected to it.

####Supported hardware The data logger currently has support for the following i2c sensors

#####Gyroscopes

• itg3200

#####Magnetic field sensors

• hmc5883l

#####Accelerometers

• adxl345

####Current status Only the basic functionalities of the sensors are in place, and there are many features that still have to be implemented.

I still have to implement at least the following:

• Calibration of all sensors
• Temperature compensation for itg32000
• An entity that collects data an calculates current heading and lean angle
• A logging framework that collects and logs data

Look at this document for hints on how calibration of hmc5883l should be done http://www.joics.com/publishedpapers/2013_10_6_1551_1558.pdf

For error correction in itg3200, look at this http://mathworld.wolfram.com/LeastSquaresFitting.html and http://en.wikipedia.org/wiki/Errors-in-variables_models

Might want to try out a PID controller too even it if is not direclty relevant to this project at the moment: https://github.com/felixge/pidctrl and http://en.wikipedia.org/wiki/PID_controller

For info on developing the IMU part: http://www.starlino.com/imu_guide.html This might also help: http://stackoverflow.com/questions/1586658/combine-gyroscope-and-accelerometer-data And this for Kalman filters and IMU: http://www.instructables.com/id/Guide-to-gyro-and-accelerometer-with-Arduino-inclu/