A MODEL FOR MEASURING THE POSITION OF A PENDULUM USING OPTO-ELECTRONIC METHOD
We propose a theoretical model for measuring with precision the position of a pendulum. This measurement is useful for the monitoring of pendulum position used in dams to verify their structural integrity. This model will use only one photodetector array sensor to achieve a price effective implementation. The model consists in a linear array of photodetectors and a LED band placed in parallel with it having the pendulum wire running between them, perpendicular with their plane. The position of the pendulum will be computed by detecting its shadow on the photodetector array when a LED from the band is lit. Taking two of these measurements is possible to compute the position of the pendulum on both x and y axis. A third measurement is made to improve the accuracy. We will compute the pendulum position errors for this theoretical model so we can decide if an implementation is feasible.
Key words: Measure pendulum position, compute errors, optic method, dams.
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