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µ¿Åº¼º°è¼öÃøÁ¤±â Emodumeter¢â
Àç·áÀÇ °øÁøÁÖÆļö (resonant frequency) °áÁ¤
* µ¿°á Çص¿ ºÐ¼® (Freeze Thaw Analysis)
* ¿µ °è¼ö °áÁ¤ (Young's Modulus Determination)
* Damping
* Coefficient Analysis
* ASTM C-215 ¹× C-666 ±Ô°Ý¿¡ ºÎÇÕ.
* ¾Æ·¡ÀÇ material parameters ¸¦ °è»ê ÇÒ ¼ö ÀÖ´Â À¯ÀÏÇÑ ºñÆı«ÀûÀÎ ¹æ¹ý:
¡Ý Young's Modulus of Elasticity(¿µÀÇ Åº¼º°è¼ö)
¡Ý Modulus of Rigidity(°µµÀÇ °è¼ö)
¡Ý Poissons Ratio(Æ÷¾Æ¼Û ºñÀ²)
¡Ý Damping Constant(´ïÇÎ »ó¼ö)
* Cross section dimension 150mm ±îÁö, ±æÀÌ 45mm - 700mmÀÇ ½Ã·á ÃøÁ¤ °¡´É
* °øÁøÁÖÆļö (resonance frequency) ÀÚµ¿ ½Äº° .
* ½Ã°£¿µ¿ª ¹× ÁÖÆļö ½ºÆåÆ®·³ (frequency spectrum) ½ÅÈ£ µ¥ÀÌÅÍ ºÐ¼®À» Å©°í ¼Õ½±°Ô º¼¼ö ÀÖ´Â µð½ºÇ÷¹ÀÌ.
* µ¥ÀÌÅÍ´Â ÀúÀåÀÌ µÇ¹Ç·Î Ãß°¡ÀûÀÎ ºÐ¼®¹× º¸°í¼¿¡ Ãß°¡ ÇÒ ¼ö ÀÖµµ·Ï PC·Î ¾÷·Îµå°¡ °¡´É.
* ºü¸£°í ½±°Ô ÀÌ¿ëÇÒ ¼ö ÀÖ´Â ½Ã½ºÅÛ
¿ø¸® (Principle)
Emodumeter¢â ÀÇ ¿ø¸®´Â ÃøÁ¤½ÃÆíÀÇ Ãæ°Ý(impact)·Î »ý¼ºµÈ Áøµ¿À» °¡¼Óµµ°è(accelermeter) ÀÇ °¨ÁöÇÑ ±âÁØ°øÁøÁÖÆļö
(fundamental resonant frequency)ÀÇ °áÁ¤ °ªÀ» ±âÃÊ·Î ÇÑ´Ù.
ÁÖÆļö ½ºÆåÆ®·³ (frequency spectrum)ÀÌ °è»êµÇ¾îÁö°í meter¿¡ µð½ºÇ÷¹À̵ȴÙ.
½Ã½ºÅÛ (System)
Emodumeter¢â MK II ´Â º¹ÀâÇÑ ÁÖÆļö ½ºÄÉ´×À» ¹èÁ¦ÇÑ ÃÖ´ëÁøÆøÀ» °è»êÇÏ´Â ÀÚµ¿ ÀåºñÀÌ´Ù.
ÁÖÆļö´Â ÀÚµ¿À¸·Î µð½ºÇ÷¹ÀÌ¿¡ º¸¿©Áö°í »ç¿ëÀÚ°¡ Ä¿¼·Î ÁÖÆļö ½ºÆåÆ®·³ °£À» À̵¿ÇÒ ¼ö ÀÖ´Ù.
½Ã°£¿µ¿ª(time domain) ½ÅÈ£ ¹× ÁÖÆļö ½ºÆåÆ®·³Àº ÀúÀåÀÌ °¡´ÉÇÏ°í PC·Î ¾÷·ÎµåÇÏ¿© Ãß°¡ ºÐ¼® ¹× º¸°í¼¸¦ ÀÛ¼º ÇÒ ¼ö ÀÖ´Ù.
°øÁøÁÖÆļö (Resonance Frequency)
Emodumeter¢â MK II Àº °í¼ÓǪ¸®¿¡º¯È¯ performs a (Fast Fourier Transform)À» ¼öÇàÇϸç ÀÌ´Â ÁÖÆļö ½ºÆåÆ®·³³»ÀÇ °øÁøÁÖÆļö
(resonance frequency) ½Äº° (identification)À» °¡´ÉÇÏ°Ô ÇÑ´Ù.
ÄÜÅ©¸®Æ® ³»±¸¼º (Durability of Concrete)
°¡¼Ó µ¿°á ¹× Çص¿ ÁÖ±â ¹× ÄÜÅ©¸®Æ® ½Ã·áÀÇ °ø°ÝÀûÀΠȯ°æ ÇÏ¿¡¼ ÄÜÅ©¸®Æ®ÀÇ ¿È¸¦ ¿¬±¸ÇÒ ¶§ ÈÚ °ø¸íÀÇ °áÁ¤Àº ¸Å¿ì Áß¿äÇÏ´Ù.
°ø¸í¹ýÀÇ ÀåÁ¡Àº ´ÙÀ½°ú °°´Ù.
1. °°Àº ½Ã·á¿¡¼ ¸Å¿ì ¿À·£ ±â°£ µ¿¾È ½ÃÇèÀ» ¹Ýº¹ÇÒ ¼ö ÀÖÀ¸¹Ç·Î ÇÊ¿äÇÑ ½Ã·áÀÇ ¼ö´Â Å©°Ô °¨¼ÒÇÑ´Ù.
2. °°Àº ½Ã·á¿¡¼ °øÁø¹ýÀ¸·Î ¾òÀº °á°ú´Â Æı«½ÃÇè ¹× ½Ã·á±ºº¸´Ù ÀçÇö¼ºÀÌ ³ô´Ù.
Àç·áÀÇ °ø¸í ÁÖÆļö¸¦ °áÁ¤Çϱâ À§ÇØ EmodumeterTM´Â ¼¼ °¡Áö ´Ù¸¥ Áøµ¿ Á¾¹æÇâ, Ⱦ¹æÇâ(Flexural) ¹× ºñƲ¸² ¸ðµåÀÇ °ø¸í ÁÖÆļö¸¦ ÃøÁ¤ÇÑ´Ù.
À̷κÎÅÍ ¿µÀÇ Åº¼º°è¼ö, °µµÀÇ °è¼ö ¹× Æ÷¾Æ¼ÛTM ºñÀ²À» °è»êÇÒ ¼ö ÀÖ´Ù.
Frequency range: |
from 10 Hz to 40 kHz |
Sampling frequency: |
10, 20, 40 or 80 kHz |
Frequency resolution: |
from 4.9 to 78.1 Hz |
Record length |
1024 or 2048 points |
Output bias level: |
9.2 V |
Accelerometer sensitivity: |
9.60 mV/g (0.979 mV/m/s2) |
Battery: |
12 Volt. 4-10 hours - continuous use |
Display: |
320 by 240; backlit for daylight use |
Storage: |
200 plus readings |
Software: |
Windows compatible 9x/me 32MB Ram |
Impactors: |
Set of 6 hardened steel balls. |
Operating Temperature Range: |
0¡ÆC to 40¡ÆC |