<p>In this research paper, a planar microstrip annular ring capacitive sensor for wheat flour level measurement in tilted manner is presented. It is a bottom-up contact type level measurement method. The proposed capacitive sensor is fabricated using FR4 substrate. The experimentation is performed using proposed sensor and wheat flour placed in the plastic container. The measurement is performed using LCR-Q meter in two conditions as; without wheat flour and interacted with changing wheat flour level. In ideal condition, the capacitance of sensor is 14.3 <i>pF</i> without wheat flour. When the wheat flour gets collected in container the capacitance of this sensor is linearly changing at different angle of tilt and level for measurement. The annular ring capacitor sensor design is theoretically validated through equivalent circuit analysis using transmission line theory. The theoretical and measured results of the fabricated sensor are found in agreement in terms of vertical level and angle of tilt of flour level. This sensor is useful for grain grinding and food industries.</p>

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Wheat Flour Level Measurement Using Planar Microstrip Annular Ring Capacitor Sensor

  • Jayant G. Joshi,
  • Mandar P. Joshi,
  • Shyam S. Pattnaik

摘要

In this research paper, a planar microstrip annular ring capacitive sensor for wheat flour level measurement in tilted manner is presented. It is a bottom-up contact type level measurement method. The proposed capacitive sensor is fabricated using FR4 substrate. The experimentation is performed using proposed sensor and wheat flour placed in the plastic container. The measurement is performed using LCR-Q meter in two conditions as; without wheat flour and interacted with changing wheat flour level. In ideal condition, the capacitance of sensor is 14.3 pF without wheat flour. When the wheat flour gets collected in container the capacitance of this sensor is linearly changing at different angle of tilt and level for measurement. The annular ring capacitor sensor design is theoretically validated through equivalent circuit analysis using transmission line theory. The theoretical and measured results of the fabricated sensor are found in agreement in terms of vertical level and angle of tilt of flour level. This sensor is useful for grain grinding and food industries.