Automatic earth tides observation system in astrogeodetic observatory in Jozefoslaw
Oruba, Artur and Janusz Bogusz
During this project the main goal was to develop and establish a complex solution that would allow us to automatically collect data from the LaCoste&Romberg model D gravity meter. We needed suitable software that processes, visualizes and stores data streams from an analog-to-digital converter connected directly to the meter. Furthermore, to remotely control the system and perform maintenance, we decided to use a stepper motor and a webcam that constantly displays the meter with its nearest neighbourhood. The main part of the developed system is the software a freeware program Auto L&RR written using Borland Delphi 7.0 Personal compiler. It mainly performs data capturing and storage but also draws graphs showing current survey status and allows the user to control and change basic parameters of the gravity meter. To avoid systematic time errors during the survey, a program that repeatedly updates the system clock is being used. Remote control over the system via network connection is achieved by an accompanying program WinVNC. The hardware part of the system contains the gravity meter, the Advantech PCL-818L analog-to-digital PC card converter, Sanyo-Denki stepper motor with its steering device and Creative WebCam Live! camera. The system developed during this project allows the user to constantly observe gravity changes in time. It also helps to control the survey correctness and, if the survey results appear to be incorrect, to change the input settings.
Event: XXIII International FIG Congress : Shaping the change
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