Month: December 2016

Precise GPS GNSS positioning with a Raspberry Pi and the RTKLIB – software installation

This chapter explains which software needs to be installed on your Raspbian installation to get the RasPiGNSS Aldebaran module which should now be mounted on top of your Raspberry Pi working. For this explanation I will use Raspbian as operation system. I am using the Raspbian version “2016-09-23-raspbian-jessie.img“. From my experiences I would suggest that this explanation will work with older versions as well with newer version of Raspbian. Maybe we will see some differences in future Raspberry Pi SBC models then in the operation system. You will learn the actual differences between the Raspberry Pi models which are...

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Precise GPS GNSS positioning with a Raspberry Pi and the RTKLIB – GPS antenna setup

For the installation of mine differential GPS solution with two RasPiGNSS Aldebaran modules two special GPS antennas are needed. The antennas are no classic GPS mousse with a USB connector. This antennas are special receiver modules with which only a GPS signal could be received. In each case for the base station and for the mobile unit a GPS antenna is needed. As recommended from www.drfasching.at I bought for the base station the antenna “Tallysman™ TW-2410” and for the mobile unit I bought the “Tallysman™ TW-4421” antenna. With this antenna setup for the base station and the robot car the...

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Precise GPS GNSS positioning with a Raspberry Pi and the RTKLIB – theoretical setup

With this post I will explain how a theoretical setup of a precise GNSS positioning architecture could look like. One essential part of the setup is the GPS base station. The base station knows her own position to less than a few centimeters exact. The mobile unit respectively the robot car is also equipped with a GPS system and know his dynamical position imprecise for a few meters. So that the mobile unit also know his position very precise the failure of the deviation received form the GPS signal has to be calculated. To make the calculation of the...

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Precise GPS GNSS positioning with a Raspberry Pi and the RTKLIB – introduction

A few years ago I started building robot cars which could drive in my living room or outdoors. Some of the vehicles are equipped with a standard USB GPS mouse. But I was again and again disappointed how inaccurate the received GPS position from an USB GPS mouse is. The accuracy of the position received was round about 4 meters. I used no Kalman filter at this time to enhance the accuracy of the received GPS position. After this experience I started with the search for a precise GPS solution I could afford and build into my model robot...

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Finding Lane Lines on the Road

Today I optimized my function to detect lane lines in a video. The video I used to test the latest version of my algorithm was recorded 2009 during a road trip together with FGordon. The video is very difficult for my setup because the quality is low and the lane lines are bleached frome time to time. I tried to optimize the seetings to detect the lane lines throughout almost all of the video. Okay sometimes the logic will draw some strange and not accurately annotated lines… For the first tests it looks good but not perfect as shown...

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