KR20040035639A - Bending measurement for construction FBG - Google Patents
Bending measurement for construction FBG Download PDFInfo
- Publication number
- KR20040035639A KR20040035639A KR1020040023156A KR20040023156A KR20040035639A KR 20040035639 A KR20040035639 A KR 20040035639A KR 1020040023156 A KR1020040023156 A KR 1020040023156A KR 20040023156 A KR20040023156 A KR 20040023156A KR 20040035639 A KR20040035639 A KR 20040035639A
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- South Korea
- Prior art keywords
- deflection
- optical fiber
- engineering structure
- value
- measuring
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
- E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
- E04F13/0801—Separate fastening elements
- E04F13/0832—Separate fastening elements without load-supporting elongated furring elements between wall and covering elements
- E04F13/0833—Separate fastening elements without load-supporting elongated furring elements between wall and covering elements not adjustable
- E04F13/0851—Hooking means on the back side of the covering elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F2290/00—Specially adapted covering, lining or flooring elements not otherwise provided for
- E04F2290/04—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire
- E04F2290/045—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire against fire
- E04F2290/046—Specially adapted covering, lining or flooring elements not otherwise provided for for insulation or surface protection, e.g. against noise, impact or fire against fire with a facing or top layer for fire insulation
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
Description
본 발명은 정밀한 변형을 계측하는데 이용되고 있는 광섬유센서의 우수한 특성을 이용하여 교량이나 고가도로 등의 토목구조물의 처짐을 측정하는 방법에 관한 것으로,의 변형을 계측할 수 있는 광섬유센서를 토목구조물의 하단 내부에 매설하거나 또는 하단 표면에 부착하여 그 변형을 계측하고, 피타고라스의 정리를 이용하여 그 처짐 정도와 위치를 파악 할 수 있는 방법인 것이다. 광섬유센서는 고유한 파장 값을 가지므로 초기 대비 누적 변형을 측정할 수 있어 그 어떤 시스템 보다 매우 정확한 처짐 정도를 추정할 수 있다.The present invention relates to a method for measuring the deflection of civil engineering structures, such as bridges and overpasses, by using the excellent characteristics of optical fiber sensors used to measure precise deformation. The fiber optic sensor that can measure the strain of is embedded in the bottom of the civil structure or attached to the bottom surface to measure the strain, and the degree and location of the deflection using the Pythagorean theorem. The fiber optic sensor has a unique wavelength value, so it can measure the cumulative strain from the initial stage, which makes it much more accurate than any other system.
한편 종래에는 광학적으로 측량을 하여 그 처짐 정도를 추정하였는데, 매번측량을 할 때마다 그 기준점이 정확히 일치해야 하는 어려움이 상존하고, 온도와 습도에 매우 민감하여 정확한 계측이 힘들뿐만 아니라 그날의 기상 상황에 따라서 측정이 불가능 할 수도 있어 원격계측은 할 수가 없었다. 그리고 교량의 높이가 높을 수록 측량을 하기가 힘들고 그 신뢰성이 매우 떨어지는 문제점이 상존하는 것이다.On the other hand, conventionally, the degree of deflection was estimated by measuring optically, and each time surveying, there is a difficulty that the reference point must be exactly matched, and it is very sensitive to temperature and humidity, so that accurate measurement is difficult and weather conditions of the day In some cases the measurement may not be possible, so telemetry could not be performed. And the higher the height of the bridge, the more difficult it is to survey and its reliability is very low.
상기와 같은 문제점을 해소하기 위해 본 발명은 일기에 관계없이 계측정밀도가 유지되며, 교량의 높이에 관계없이 우수한 신뢰성을 갖고 상시 계측이 가능한 계측 방법을 찾는 것을 목적으로 한다.In order to solve the above problems, the present invention aims to find a measurement method that maintains measurement accuracy regardless of weather, and that can be measured at any time with excellent reliability regardless of the height of the bridge.
이와 같은 목적을 달성하기 위해 본 발명은, 일기의 영향을 받지 않고 분해능이 우수하여 고유한 파장 값을 가지고 있어 누적 변형을 계측할 수 있으며, 상시 원격계측이 가능한 소재인 광섬유센서를 이용한 처짐 계측 방법을 제공하고자 한다.In order to achieve the above object, the present invention has an inherent wavelength value due to excellent resolution without being influenced by weather, and can measure cumulative strain, and sag measurement method using an optical fiber sensor which is a material capable of remote measurement at all times. To provide.
교량이나 고가도로 등 토목구조물의 처짐을 광섬유센서를 이용하여 측정하는 방법에 관한 것으로, 더욱 상세하게는 광섬유센서를 토목구조물의 하단부에 일정한 길이로 연속해서 구조물 내부에 매설 하거나, 또는 그 외부에 부착하여, 구조물의 변형을 측정하면, 그 변형 값과 초기 값을 알 수가 있다. 이때 피타고라스의 정리를 이용하여 초기값과 변형후의 값은 밑변이나 빗변이 되고, 처짐 값은 높이가 된다. 연속해서 설치되어 있는 각각의 센서에서 측정된 값을 피타고라스의 정리를 이용하여 계산하면, 각각의 처짐 정도를 알 수 있고, 이때 각각의 처짐 값을 모두 더하고 그 값에 2를 나누어 주면 그 구조물의 최종 처짐 값을 알 수 있다. 또한 어는 한쪽 끝을 기준으로 각각의 처짐 값을 합산해서 최종 처짐 값이 되는 지점이 그 토목구조물의 최대 처짐 지점인 것을 알 수 있는 방법인 것이다.The present invention relates to a method for measuring deflection of civil engineering structures such as bridges and overpasses using fiber optic sensors. By measuring the deformation of the structure, the deformation value and the initial value can be known. At this time, the Pythagorean theorem uses the initial value and the value after deformation to be the base or hypotenuse, and the deflection value is the height. By calculating the Pythagorean theorem, the measured values of each sensor installed in succession can be used to determine the degree of deflection. In this case, add each deflection value and divide the value by 2. The deflection value is known. In addition, the sum of each deflection value based on one end is a method of knowing that the final deflection value is the maximum deflection point of the civil structure.
도 1은 본 발명의 일반적인 실시 예1 is a general embodiment of the present invention
도 2는 본 발명의 측정 방법 증폭 예시 도2 is a diagram illustrating amplification of the measuring method of the present invention.
첨부된 도 1은 본 발명의 광섬유센서를 이용한 토목구조물의 처짐 측정 방법의 일반적인 설치 예이고, 도 2는 본 발명의 측정 방법 예시 도이다.Attached Figure 1 is a general installation example of the deflection measurement method of civil engineering structures using the optical fiber sensor of the present invention, Figure 2 is an exemplary view illustrating the measurement method of the present invention.
이하 도 1을 바탕으로 광섬유센서의 설치 예를 설명하면 다음과 같다.Hereinafter, an installation example of an optical fiber sensor will be described with reference to FIG. 1.
토목구조물의 하단 표면(10)에 일정한 길이의 광섬유센서(S)를 연속적으로 부착하고, 그 설치 위치와 파장 값을 설정한다.The fiber optic sensor S of a certain length is continuously attached to the bottom surface 10 of the civil engineering structure, and its installation position and wavelength value are set.
도 2를 바탕으로 측정 방법을 설명하면, 토목구조물의 하단 표면(10) 광섬유센서(S)가 부착된 각각의 지점에서 표면(10)에 수직한 수선(30)을 내리고 처짐이 발생하였다고 가정을 하고, 이때의 광섬유센서(S)는 S21,S22....S26,로 표현되며, 각각의 처짐은 h1,h2....h6으로 표현할 수 있고, 초기 토목구조물의 길이 L0= S11 + S12 + S13 + S14 + S15 + S16 이고, 변형 후 길이 L`= S21 + S22 + S23 + S24 + S25 + S26 이다. 따라서 h1은 피타고라스의 정리에 의해서의 식으로 표현된다. 이때 토목구조물의 L`에 대한 전체 처짐Referring to the measurement method based on FIG. 2, it is assumed that at each point where the bottom surface 10 of the civil engineering structure is attached to the optical fiber sensor S, the waterline 30 perpendicular to the surface 10 is lowered and sag occurs. In this case, the optical fiber sensor (S) is represented by S21, S22 .... S26, each sag can be represented by h1, h2 .... h6, the length of the initial civil structure L 0 = S11 + S12 + S13 + S14 + S15 + S16 and the length after deformation L` = S21 + S22 + S23 + S24 + S25 + S26. Therefore h1 is based on the Pythagorean theorem It is expressed as At this time, the overall deflection of L` of civil structures
이다. to be.
그리고 처짐의 중심은 토목구조물의 어느 한쪽 끝을 기준으로 각각의 h1.h2... 값을 순차적으로 더해서값과 같게 되는 센서의 위치가 처짐의 중심이 됨을 알 수 있다.And the center of deflection is to add each h1.h2 ... value sequentially based on either end of the civil structure. It can be seen that the position of the sensor, which is equal to the value, is the center of deflection.
이상에서 상술한 바와 같이 본 발명은, 기존의 측량에 의존했던 토목구조물의 처짐 측정방법을, 우수한 측정 소자인 광섬유센서를 사용하여, 일일이 계측할 때마다 기준점 찾아 셋팅해야 하는 번거러움을 해소시키고, 일기에 관계없이 상시 원격 계측이 가능하게 하며, 정밀한 계측을 할 수 있어 그 신뢰도를 높이고, 계측이 어려웠던 고가 교량의 계측을 수월하게 할 수 있게 하는 아주 우수한 측정 방법을 제공 하는 것이다.As described above, the present invention eliminates the hassle of finding and setting a reference point every time a measurement method for sag of civil structures, which has been dependent on conventional surveying, using an optical fiber sensor which is an excellent measuring element. Regardless of whether it is possible to perform remote measurement at any time, it is possible to make precise measurement, and it is possible to improve the reliability and to make it possible to easily measure the expensive bridge that was difficult to measure.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100786221B1 (en) * | 2007-08-16 | 2007-12-17 | (주)다음기술단 | Safety diagnosis apparatus for displacement measure of slab structure |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001066118A (en) * | 1999-06-21 | 2001-03-16 | Toa Grout Kogyo Co Ltd | Optical fiber sensor, optical fiber sensor unit and displacement measuring device by using sensor and optical fiber sensor unit connection structure |
JP2001153623A (en) * | 1999-11-30 | 2001-06-08 | Sumitomo Electric Ind Ltd | Displacement monitoring fiber sensor and displacement measuring method using the same |
JP2001289616A (en) * | 2000-04-03 | 2001-10-19 | Sumitomo Electric Ind Ltd | Optical fiber displacement sensor and displacement measuring method using the same |
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001066118A (en) * | 1999-06-21 | 2001-03-16 | Toa Grout Kogyo Co Ltd | Optical fiber sensor, optical fiber sensor unit and displacement measuring device by using sensor and optical fiber sensor unit connection structure |
JP2001153623A (en) * | 1999-11-30 | 2001-06-08 | Sumitomo Electric Ind Ltd | Displacement monitoring fiber sensor and displacement measuring method using the same |
JP2001289616A (en) * | 2000-04-03 | 2001-10-19 | Sumitomo Electric Ind Ltd | Optical fiber displacement sensor and displacement measuring method using the same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100786221B1 (en) * | 2007-08-16 | 2007-12-17 | (주)다음기술단 | Safety diagnosis apparatus for displacement measure of slab structure |
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