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Improvement in sensitivity of an inductive oil palm fruit sensor.

Misron N, Harun NH, Lee YK, Sidek RM, Aris I, Wakiwaka H, Tashiro K - Sensors (Basel) (2014)

Bottom Line: The sensitivity of such a sensor plays a crucial role in determining the effectiveness of the method.This paper investigates the results pertaining to the effects of the air coil structure of an oil palm fruit sensor, taking consideration of the used copper wire diameter ranging from 0.10 mm to 0.18 mm with 60 turns.The result from this study is important to improve the sensitivity of the inductive oil palm fruit sensor mainly with regards to the design of the air coil structure.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Engineering, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia. norhisam@eng.upm.edu.my.

ABSTRACT
Among palm oil millers, the ripeness of oil palm Fresh Fruit Bunch (FFB) is determined through visual inspection. To increase the productivity of the millers, many researchers have proposed with a new detection method to replace the conventional one. The sensitivity of such a sensor plays a crucial role in determining the effectiveness of the method. In our preliminary study a novel oil palm fruit sensor to detect the maturity of oil palm fruit bunches is proposed. The design of the proposed air coil sensor based on an inductive sensor is further investigated to improve its sensitivity. This paper investigates the results pertaining to the effects of the air coil structure of an oil palm fruit sensor, taking consideration of the used copper wire diameter ranging from 0.10 mm to 0.18 mm with 60 turns. The flat-type shape of air coil was used on twenty samples of fruitlets from two categories, namely ripe and unripe. Samples are tested with frequencies ranging from 20 Hz to 120 MHz. The sensitivity of the sensor between air to fruitlet samples increases as the coil diameter increases. As for the sensitivity differences between ripe and unripe samples, the 5 mm air coil length with the 0.12 mm coil diameter provides the highest percentage difference between samples and it is amongst the highest deviation value between samples. The result from this study is important to improve the sensitivity of the inductive oil palm fruit sensor mainly with regards to the design of the air coil structure. The efficiency of the sensor to determine the maturity of the oil palm FFB and the ripening process of the fruitlet could further be enhanced.

No MeSH data available.


Inductance characteristics of the oil palm fruit sensor.
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f6-sensors-14-02431: Inductance characteristics of the oil palm fruit sensor.

Mentions: When analyzing the inductance characteristics of air, ripe fruits and unripe fruits, the graph gives different resonant frequencies, where the resonant frequency refers to the peak of the frequency. Although air, ripe fruit and unripe fruit are giving different resonant frequencies, the graphs show similar curves. Figure 6 shows the general result when running the measurement procedures within a range of frequency. The x-axis represents the frequency and the y-axis represents the inductance value. From the graph, it is obvious that a different frequency point, gives an inductance value. At the resonant frequency, the inductance value is the highest. The shape of the graph is shown in Figure 6, where the black line is the characteristic inductance of air, the red line is the characteristic inductance of ripe fruit while the blue line is the characteristic inductance of unripe fruit. The inductance characteristics of the each sensor portray a similar pattern throughout the whole series of experiments. It is important to standardize the inductive characteristics of each sensor to ensure the repeatability of the sensor. In this paper, the value of the resonant frequency of each sample and air is recorded and plotted against the air coil length and the coil diameter. The value of the resonance is then normalized agianst the resonance frequency of air. It is important to determine the sensitivity of the sensor based on the normalized resonance frequency for air and the fruitlet samples.


Improvement in sensitivity of an inductive oil palm fruit sensor.

Misron N, Harun NH, Lee YK, Sidek RM, Aris I, Wakiwaka H, Tashiro K - Sensors (Basel) (2014)

Inductance characteristics of the oil palm fruit sensor.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3958233&req=5

f6-sensors-14-02431: Inductance characteristics of the oil palm fruit sensor.
Mentions: When analyzing the inductance characteristics of air, ripe fruits and unripe fruits, the graph gives different resonant frequencies, where the resonant frequency refers to the peak of the frequency. Although air, ripe fruit and unripe fruit are giving different resonant frequencies, the graphs show similar curves. Figure 6 shows the general result when running the measurement procedures within a range of frequency. The x-axis represents the frequency and the y-axis represents the inductance value. From the graph, it is obvious that a different frequency point, gives an inductance value. At the resonant frequency, the inductance value is the highest. The shape of the graph is shown in Figure 6, where the black line is the characteristic inductance of air, the red line is the characteristic inductance of ripe fruit while the blue line is the characteristic inductance of unripe fruit. The inductance characteristics of the each sensor portray a similar pattern throughout the whole series of experiments. It is important to standardize the inductive characteristics of each sensor to ensure the repeatability of the sensor. In this paper, the value of the resonant frequency of each sample and air is recorded and plotted against the air coil length and the coil diameter. The value of the resonance is then normalized agianst the resonance frequency of air. It is important to determine the sensitivity of the sensor based on the normalized resonance frequency for air and the fruitlet samples.

Bottom Line: The sensitivity of such a sensor plays a crucial role in determining the effectiveness of the method.This paper investigates the results pertaining to the effects of the air coil structure of an oil palm fruit sensor, taking consideration of the used copper wire diameter ranging from 0.10 mm to 0.18 mm with 60 turns.The result from this study is important to improve the sensitivity of the inductive oil palm fruit sensor mainly with regards to the design of the air coil structure.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Engineering, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia. norhisam@eng.upm.edu.my.

ABSTRACT
Among palm oil millers, the ripeness of oil palm Fresh Fruit Bunch (FFB) is determined through visual inspection. To increase the productivity of the millers, many researchers have proposed with a new detection method to replace the conventional one. The sensitivity of such a sensor plays a crucial role in determining the effectiveness of the method. In our preliminary study a novel oil palm fruit sensor to detect the maturity of oil palm fruit bunches is proposed. The design of the proposed air coil sensor based on an inductive sensor is further investigated to improve its sensitivity. This paper investigates the results pertaining to the effects of the air coil structure of an oil palm fruit sensor, taking consideration of the used copper wire diameter ranging from 0.10 mm to 0.18 mm with 60 turns. The flat-type shape of air coil was used on twenty samples of fruitlets from two categories, namely ripe and unripe. Samples are tested with frequencies ranging from 20 Hz to 120 MHz. The sensitivity of the sensor between air to fruitlet samples increases as the coil diameter increases. As for the sensitivity differences between ripe and unripe samples, the 5 mm air coil length with the 0.12 mm coil diameter provides the highest percentage difference between samples and it is amongst the highest deviation value between samples. The result from this study is important to improve the sensitivity of the inductive oil palm fruit sensor mainly with regards to the design of the air coil structure. The efficiency of the sensor to determine the maturity of the oil palm FFB and the ripening process of the fruitlet could further be enhanced.

No MeSH data available.