A Microstrip Sensor for Determination of Harvesting Time for Oil Palm Fruits
The conventional method to determine ripeness of the oil palm bunch is by using the number or percentage of detached fruits per bunch. However the method has the disadvantage that it does not relate to oil quantity and quality. Previous work has shown a close relationship between oil content and...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
1994
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/8584/1/FSAS_1994_2_A.pdf |
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| Summary: | The conventional method to determine ripeness of the oil
palm bunch is by using the number or percentage of detached
fruits per bunch. However the method has the disadvantage that
it does not relate to oil quantity and quality. Previous work has
shown a close relationship between oil content and moisture
content during fruit development. Thus,the oil content and
subsequently the time to harvest the fruit bunch can be
determined from moisture measurements.
In this study, a microstrip sensor has been developed to
determine the optimum time of harvesting the oil palm fruits
based on microwave attenuation. The sensor operating at 10.7GHz
was fabricated using RT-Duroidsubtrate and is suitable for
single fruit measurements. A theoretical analysis has been carried out to predict the variation in at tenuati on with moisture
content in the fruit mesocarp. The propagation of the
electromagnetic wave in the microstripis based on
quasi - transverse electromagnetic mode (TEM mode) and the
at tenuation is obtained by using signal flow graph technique. |
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