Abstract
Tahılın uzun süre saklanmasındaki en önemli araç
tahıl silolarıdır. Tahılın miktarının bilinmesi hayati öneme sahip olduğu için
birçok ticari seviye ölçüm yöntemi (mekanik, ultrasonik, elektromanyetik-EM
vs.) geliştirilmiştir. Bu yöntemler arasında yayılımlı radar (YR), tahribatsız
algılama özelliğinden ötürü son yıllarda çok daha popüler bir seviye ölçüm
tekniği haline gelmiştir. Ancak hem dar huzmeli aydınlatma kullanmak zorunda
olan YR, hem de diğer metotlar tahılın seviyesini ancak tek bir noktadan ölçebilmektedirler.
Bu çeşit bir ölçüm yönteminde tahılın konik tümsek yapısı tümüyle
algılanamadığından, tüm bu yöntemler tam doğru sonuç verememektedir. Bu
çalışmada silo içindeki tahılın miktarının tam olarak ölçülebilmesi için ilk
kez en iyi ilinti arama tabanlı YR tekniği kullanılmıştır. Geliştirilen yöntemi
test etmek ve performansını göstermek için ticari boyutlarda bir adet silo imal
ettirilmiş ve YR ölçümleri gerçekleştirilmiştir. X-bantta geniş huzmeli EM
aydınlatma ile tahılın olası tüm doluluk seviyesinin geri saçılım radar
işaretleri elde edilmiş ve veri tabanına kayıt ettirilmiştir. Daha sonra, silo içindeki tahılın
bilinmeyen miktarı daha önce kaydedilen veri tabanı ölçümleri ile
karşılaştırılarak doğru şekilde tespit edilmiştir.
Keywords
References
- Grover R. (1998) Radar level measurement – an overview, SA Instrumentation and Control.
- Lewis J. D. (2004) Technology Review Level Measurement of Bulk Solids in Bins, Silos and Hoppers” 2004 Monitor Technologies LLC.
- Matthew R., Bucci B., Vipperman J., Allanach J., Abraham B. (2009) Microphone Array Analysis Methods Using Cross-Correlations, Proceedings of 2009 ASME International Mechanical Engineering Congress, Lake Buena Vista, FL. doi:10.1115/IMECE2009-10798
- Yigit E., Demirci S., Ozdemir C., Tekbas M. (2013) Short-Range Ground-based Synthetic Aperture Radar Imaging: Performance Comparison between Frequency-Wavenumber Migration and Back-projection Algorithms, Journal of Applied Remote Sensing, 7(1), 1-24. doi:10.1117/1.JRS.7.073483
- Yiğit E., Işiker H., Toktaş A., Saibun T. (2015) Cs-Based Radar Measurement of Silos Level, 2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 26-31 July 2015. doi: 10.1109/IGARSS.2015.7326638
- Yiğit, E., Demirci, Ş, Özdemir, C., Kavak, A. (2007) A Synthetic Aperture Radar Based Focusing Algorithm For B-Scan Ground Penetrating Radar Imagery, Microwave Optical Technology Letters, 49(10), 2534-2540. doi: 10.1002/mop.22724
- Yiğit E., Unal A., Demırcı S., Vertıy A., and Ozdemir C. (2011) An Adapted Matched Filter Algorithm for Millimeter Wave Ground Based Squint Mode SAR Applications, The International Conference on Infrared, Millimeter, and Terahertz Waves, Houston Texas, pp. 1- 2. doi: 10.1109/irmmw-THz.2011.6105117
Abstract
The grain silos are the most important tools to
stock grain for a long duration. Since the knowledge of the quantity of the
grain is crucially important, many commercial level measurement methods (mechanic,
ultrasonic, electromagnetic-EM etc.) have been developed. Among these methods
thru-air radar (TAR) has recently become more popular level measurement
technique because of its non-destructive perception ability. However both TAR,
which has to use narrow beam illumination, and other methods can only measure
the level of grain from a single point. Since the conical bump structure of grain
is not fully perceived in this kind of measurement method, all these methods
cannot give exact results. In this study the best correlation search-based TAR
technique is firstly used to accurately measure the quantity of grain inside a
silo. To test the developed method and demonstrate its performance, a
commercial sized grain silo is constructed and TAR measurements are performed.
By using X-band wide-beam EM illumination, backscattering radar signs of the
probable whole packness levels of the grain are gathered and recorded to data
base. Then, the unknown amount of the grain inside a silo is accurately
detected by comparing with previously recorded data base measurements.
Keywords
References
- Grover R. (1998) Radar level measurement – an overview, SA Instrumentation and Control.
- Lewis J. D. (2004) Technology Review Level Measurement of Bulk Solids in Bins, Silos and Hoppers” 2004 Monitor Technologies LLC.
- Matthew R., Bucci B., Vipperman J., Allanach J., Abraham B. (2009) Microphone Array Analysis Methods Using Cross-Correlations, Proceedings of 2009 ASME International Mechanical Engineering Congress, Lake Buena Vista, FL. doi:10.1115/IMECE2009-10798
- Yigit E., Demirci S., Ozdemir C., Tekbas M. (2013) Short-Range Ground-based Synthetic Aperture Radar Imaging: Performance Comparison between Frequency-Wavenumber Migration and Back-projection Algorithms, Journal of Applied Remote Sensing, 7(1), 1-24. doi:10.1117/1.JRS.7.073483
- Yiğit E., Işiker H., Toktaş A., Saibun T. (2015) Cs-Based Radar Measurement of Silos Level, 2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 26-31 July 2015. doi: 10.1109/IGARSS.2015.7326638
- Yiğit, E., Demirci, Ş, Özdemir, C., Kavak, A. (2007) A Synthetic Aperture Radar Based Focusing Algorithm For B-Scan Ground Penetrating Radar Imagery, Microwave Optical Technology Letters, 49(10), 2534-2540. doi: 10.1002/mop.22724
- Yiğit E., Unal A., Demırcı S., Vertıy A., and Ozdemir C. (2011) An Adapted Matched Filter Algorithm for Millimeter Wave Ground Based Squint Mode SAR Applications, The International Conference on Infrared, Millimeter, and Terahertz Waves, Houston Texas, pp. 1- 2. doi: 10.1109/irmmw-THz.2011.6105117
Details
| Subjects | Engineering |
|---|---|
| Journal Section | Research Articles |
| Authors | |
| Publication Date | August 20, 2017 |
| Submission Date | September 30, 2016 |
| Acceptance Date | June 7, 2017 |
| Published in Issue | Year 2017 Volume: 22 Issue: 2 |
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