A commercial delivery drone needs a small pressure transducer to measure its altitude. A particular sensor is

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A commercial delivery drone needs a small pressure transducer to measure its altitude. A particular sensor is found that meets the basic specs. It can measure pressures of \(15 \mathrm{kPa}\) (2.18 psi) to \(115 \mathrm{kPa}(16.8 \mathrm{psi})\) linearly. It requires \(5 \mathrm{~V}\) to operate, and it outputs \(0.2 \mathrm{~V}\) at \(15 \mathrm{kPa}\) and \(4.8 \mathrm{~V}\) at \(115 \mathrm{kPa}\). It can be modelled as a Thévenin source that varies from 0.2 to 4.8 \(\mathrm{V}\) with a \(R_{\mathrm{T}}\) of \(750 \Omega\). The typical pressure at sea level is \(101 \mathrm{kPa}\) and changes by \(-1.2 \mathrm{kPa}\) every \(100 \mathrm{~m}\).

(a) What is the maximum height that the sensor can measure?

(b) Design a suitable interface that measures the height of the delivery drone between sea level and the maximum height of the sensor. Output the sensor's height measurement to a \(0-5 \mathrm{~V}\) ADC.

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The Analysis And Design Of Linear Circuits

ISBN: 9781119913023

10th Edition

Authors: Roland E. Thomas, Albert J. Rosa, Gregory J. Toussaint

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