Fuel level measurement system based on absolute shaft encoder

•An absolute shaft encoder is designed by a single track gray color code.•Only an optical trans-receiver is required to decode this code.•It is sensed the float arm movement during the variation of fuel level in a tank.•A signal processing circuit calibrates the encoder output with fuel level.•This...

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Bibliographic Details
Published in:Sensors and actuators. A. Physical. 2017-06, Vol.259, p.77-84
Main Authors: Sarkar, Tuhin Subhra, Das, Subir, Chakraborty, Badal, Dutta, Himadri Sekhar
Format: Article
Language:English
Subjects:
Absolute encoder
Float
Fuel level sensor
Fuels
Luminous intensity
Measurement techniques
Modulated light intensity
Signal processing
Signal processing circuit
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Summary:•An absolute shaft encoder is designed by a single track gray color code.•Only an optical trans-receiver is required to decode this code.•It is sensed the float arm movement during the variation of fuel level in a tank.•A signal processing circuit calibrates the encoder output with fuel level.•This prototype has merits of high accuracy, resolution and sensitivity. In this article a new type of absolute shaft encoder is presented for the measurement of fuel level in a tank. This measurement technique is based on the principle of sensing the float arm displacement with respect to the fuel level. Here, the mechanical displacement is detected by an absolute shaft encoder and each position is represented by variant intensity of lights. Furthermore, the variation of light intensity is converted into voltage level by using a signal processing circuit (SPC) and calibrated with measured fuel level. Experimentally, it is observed that the developed prototype is able to measure the fuel level up to the range of 30cm within the accuracy of ±1% FSO.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2017.03.028