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Accumulator Volume Sensor Final Project Report (Electrical Project)

Accumulator Volume Sensing Team has developed two sensor designs aimed at detecting the position of the piston within a 4024 accumulator. The two designs include the use of a Renishaw LMA10 magnetic encoder and a SpectraSymbol HotPot linear potentiometer.

The magnetic encoder solution drastically increases the accuracy of sensing the piston position compared to the current solutions of both a string-pot and linear variable differential transformer while costing slightly less. The linear potentiometer seeks to provide a solution that drastically decreases the cost compared to the present sensing methods. Both designs call for a modification to one half of the piston guide part on the 4024 piston accumulator.

The purpose of this report is to outline the design process we went through in selecting our two final solutions, as well as explain how we propose the sensors be implemented in an accumulator. Also included is the testing process and resulting accuracy uncertainty. This project covers both the mechanical design of the sensor mounting, as well as the electrical signal processing or adjustment.
Source: California Polytechnic State University
Authors: Chris Naughton | Kinwei Yu | Michael George

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