this is for holding javascript data
Rein D. Otsason added Ultrasound.tex
about 10 years ago
Commit id: 3434f34d320cec59efa16b65783c5fd3b70f0e7a
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\subsubsection{Reflective Ultrasonic}
Ultrasonic sensors use ultrasonic waves to detect a wide variety of targets in many environmental conditions, and are particularly useful for detecting transparent objects\cite{Tektron}. However, they must be aligned very precisely with the desired surface and have a minimum sensing distance as there is often a blind spot directly in front of the device, which is an issue for the small scale on which the candlelight’s presence will need to be determined. Furthermore, the sensors must be placed a minimum distance (sometimes up to 1.5 m) away from each other to prevent interference between sensors\cite{RockwellAutomation}. This is also problematic given that the design calls for nine sensors spaced close together. As such, reflective ultrasonic sensors are impractical for for the detection of candlelights and/or the tray in this application.
