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Çѱ¹¼öÀÚ¿øÇÐȸ / v.28, no.6, 1995³â, pp.183-191
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( Velocity Measurement of Stream Water Surface Using Microwave )
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ÇÏõÀÇ È«¼öÀ¯¼ÓÀ» ÃøÁ¤Çϱâ À§ÇÏ¿©, ÀüÀÚÆÄ¸¦ ÀÌ¿ëÇÑ ¹° Ç¥¸é À¯¼Ó ÃøÁ¤Ã¼°è¸¦ °³¹ßÇÏ¿´´Ù. ÇöÀçÀÇ °³¹ß´Ü°è´Â ½ÇÇè¿ë À¯¼ÓÃøÁ¤Ã¼°è ¼öÁØÀÌ´Ù. ÀüÀÚÆÄ Ç¥¸éÀ¯¼Ó°è´Â ÃʰíÁÖÆÄ(micro-wave) ÀüÀÚÆÄÀÇ µµÇ÷¯ È¿°ú¸¦ ÀÌ¿ëÇÑ´Ù. ÀÌ´Â ÀüÀÚÆÄÀÇ ¹ßÁø°ú ¾ÈÅ׳ª¸¦ ÅëÇÑ ¹Ý»çÆÄ ¼ö½Å, Â÷Á֯ļö ½ÅÈ£ÀÇ ÃßÃâ·Î ÀÌ·ç¾îÁö´Â RFºÎºÐ°ú, Â÷Á֯ļö ½ÅÈ£ÀÇ A/Dº¯È¯ ¹× °í¼Ó Èĸ®¿¡ º¯È¯ µîÀ¸·Î ÀÌ·ç¾îÁö´Â ½Åȣ󸮺ηΠ±¸¼ºµÈ´Ù. ±¸¼ºµÈ À¯¼ÓÃøÁ¤ ü°è·Î ±³·® ¾Æ·¡ À¯¼Ó, ´ëû Á¶Á¤Áö´ï ¹æ¼ö·Î µî¿¡¼­ ÃøÁ¤ ½ÇÇèÇÏ¿´°í ¼±¹ÚÇØ¾ç°øÇÐ ¿¬±¸¼¾ÅÍÀÇ ¼±¹Ú ½ÇÇè¿ë ¼±Çü¼öÁ¶¿¡¼­ °ËÁõ ½ÇÇèÀ» ¼öÇàÇÏ¿´´Ù. °ËÁõ°á°ú A/D º¯È¯±â Á¦ÀÛ¿À·ù¿¡¼­ ¹ß»ýµÈ 4% ¿ÀÂ÷ À̿ܿ¡ ÃøÁ¤È¯°æÀÇ ¹®Á¦¿¡¼­ ºñ·ÔµÈ ¸î %ÀÇ ¿ÀÂ÷°¡ È¥ÀçµÇ¾î ÀÖÀ½ÀÌ ºÐ¼®µÇ¾ú´Ù. ±×·¯³ª 0.5~3.5 m/s À¯¼ÓÀ» ÃøÁ¤ÇÑ °á°ú, ±âÁؼӵµ¿Í ÃøÁ¤¼Óµµ°£ ¼±Çü¼ºÀÌ ¿ì¼öÇϰí È«¼ö À¯¼Ó ÃøÁ¤¿¡ ¸Å¿ì À¯¿ëÇÑ ÀåºñÀÓÀÌ ÀÔÁõµÇ¾ú´Ù. ÇâÈÄ ¼ÒÇüÈ­, °æ·®È­¸¦ ¼öÇàÇÏ°í ¹Ù¶÷, ¹° Ç¥¸éÀÇ ºÒ±ÔÄ¢ À¯µ¿¿¡ ÀÇÇÑ ¿µÇâÀ» ºÐ¼®ÇÏ¿© ½Åȣó¸® ¹æ¾ÈÀ» ¸¶·ÃÇÏ´Â ÀçÁ¦ÀÛ (re-engineering) °úÁ¤ÀÌ ¿ä±¸µÈ´Ù.
Applying microwave, a velocity measurement system has been developed in order to measure the velocity of stream water surface. It's main purpose is the measurement for high velocity of flood water. It is under the developing stage of experimental measurement system. The microwave surface velocity meter uses Doppler effects of microwave. It consists of a radio frequency(RF) part and that of signal processing. Thr RF part has the function of microwave oscillation, reception of reflected wave, and determination of Doppler frequency, etc. Signal processing designates amplification, fast Fourier transform, etx. Various measuring experiments were performed at bridges and a spillway of Taechong re-regulation dam with the microwave velocity meter. Verification test was also made through water tank of ship model test at Research Institute of Ships and Ocean Engineering. It shows 4% error inherent in A/D converter and additional several percentage errors from measurement circumstance. The measuring ranges are from 0.5 to 3.5 m/s. The result shows good linear relationship between carriage velocity and measured velocity, thus proves usefulness as a measuring instrument for flood water velocity. The instrument requires overall re-engineering procedure and number of data should be accumulated and analyzed to treat wind effects and random fluctuations of water surface.
 
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.28, no.6, 1995³â, pp.183-191
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511920096511)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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