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Triple Flat-Type Inductive-Based Oil Palm Fruit Maturity Sensor.

Nor Aziana Aliteh1, Norhisam Misron2,3, Ishak Aris4

  • 1Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia. aziana.teh@gmail.com.

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Summary
This summary is machine-generated.

A novel inductive sensor using triple flat-type air coils can distinguish ripe from unripe oil palm fruits. This sensor detects changes in resonance frequency and fruitlet capacitance, offering a reliable method for assessing fruit maturity.

Keywords:
air coilinductive conceptmaturity classificationmoisture contentoil palmresonance frequency

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Area of Science:

  • Agricultural Engineering
  • Sensor Technology
  • Electrical Engineering

Background:

  • Oil palm fruit maturity assessment is crucial for quality control and processing.
  • Current methods for determining oil palm fruit ripeness can be labor-intensive and subjective.
  • Developing objective and efficient sensing technologies is essential for the palm oil industry.

Purpose of the Study:

  • To investigate a triple flat-type air coil inductive sensor for differentiating oil palm fruit maturity stages (ripe vs. unripe).
  • To analyze the performance of two triple coil structures (Triple I and Triple II) based on resonance frequency and fruitlet capacitance.
  • To evaluate the precision and repeatability of the sensor using the coefficient of variation (cv).

Main Methods:

  • Fabrication and testing of two triple flat-type air coil inductive sensor prototypes (Triple I and Triple II).
  • Measurement of resonance frequency and fruitlet capacitance changes in oil palm fruits at different maturity stages.
  • Comparison of sensor performance using the coefficient of variation (cv) to assess data precision and repeatability.

Main Results:

  • A decrease in fruitlet capacitance and a shift in resonance frequency were observed as oil palm fruits ripened.
  • The Triple I sensor configuration demonstrated smaller and more consistent coefficients of variation for both resonance frequency and fruitlet capacitance compared to Triple II.
  • The inductive sensor effectively identified differences between ripe and unripe oil palm fruits.

Conclusions:

  • A triple flat-type air coil inductive sensor can accurately determine the maturity stages of oil palm fruits.
  • The Triple I coil design offers superior precision and repeatability for this application.
  • Inductive sensor technology, utilizing coils, is a viable approach for developing ripeness sensors for oil palm fresh fruit bunches.