• 제목/요약/키워드: Geomagnetic field

검색결과 179건 처리시간 0.023초

지구자기장 기반 실내측위기술의 건설현장 적용 가능성 검토 (A Review on the Applicability of Geomagnetic Field-Based Indoor Positioning in Construction Site)

  • 김현민;이창우;김형준;이창수;임바다;조훈희
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2023년도 봄 학술논문 발표대회
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    • pp.123-124
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    • 2023
  • Despite the acuuracy, stability, and economic feasibility of geomagnetic field-based indoor positioning, its applicability in construction sites needs to be thoroughly discussed due to the issue of distortion of geomagnetic fields around ferromagnetic objects such as rebars. In this study, the possibility of applying the geomagnetic field-based indoor positioning in construction sites was reviewed through the Student's t-test after measuring the changes in geomagnetic field values depending on the presence or absence of rebars. The statistical analysis revealed that there is a high probability (over 80%) of significant changes in geomagnetic field values when measuring points are located within 60cm from the rebars. On the other hand, the probability of minimal changes in geomagnetic field values is over 90% when measuring points are located more than 60cm from the rebars. This suggests the application of geomagnetic-based indoor positioning in construction sites would be possible if the issue of distortion in geomagnetic field values near rebars within 60cm is resolved.

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주거에서 지자기장의 위해성에 관한 기초연구 (The Health Hazard of Geomagnetic Field in Dwellings)

  • 한종구;박동소
    • KIEAE Journal
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    • 제5권1호
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    • pp.43-49
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    • 2005
  • People grow up and build up most of their character through living in dwelling space and have relax and refresh at home. Creating healthy dwelling space is being considered very important in architectural planning and design for providing comfortable living environment and improving quality of life. One of the properties of the earth is that the earth has a magnetic field associated with it- the Geomagnetic field. The geomagnetic field is produced by a combination of crustal rocks, external electric current systems that surround the earth that surround the earth and currents induced in the outer layers of the earth by magnetic field variations. Human beings have evolved with the background of magnetic field, they are accustomed to living in its presence. Geopathic stress occurs at geopathic zones where the geomagnetic field is disturbed. Geopathic zones exhibit magnetic charges. Geopathic zones are characterized by variations in geomagnetism, for the geomagnetic field is not uniform but exhibits many highly localized distortions, some random, some fairly regular. These occur in geological faults, caves and underground water channel. Many research papers and experiments of the western countries indicates that the geomagnetic field affects the people and living organism in dwellings. Therefore, it is necessary to investigate the geomagnetic field and people's response in living space. In this study the Health Hazard of geomagneic field in dwelling are studied through literature survey of related science field.

건설현장 내 작업자 실내측위를 위한 지구자기장 보정 범위 도출 (Identifying Correction Range of Geomagnetic Field for Indoor Positioning of Workers at Construction Site)

  • 김현민;안희재;이창수;김하림;고영웅;조훈희
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2022년도 가을 학술논문 발표대회
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    • pp.93-94
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    • 2022
  • Although various studies about indoor positioning systems, such as beacon and Wifi, have been conducting for indoor positioning of workers at construction sites, these systems have limitations in terms of accuracy or economics. To overcome these limitations, geomagnetic field sequence-based indoor positioning technology can be a good alternative. However, it is necessary to correct the geomagnetic field near the construction material stocking area since the geomagnetic field can be distorted near construction materials such as rebars. Therefore, this study conducted an experiment for identifying correction range of geomagnetic field near the construction material stocking area. It was analyzed that the geomagnetic field should be corrected up to 60cm in the horizontal direction from the stocking point if the height of stocking area for rebars is 40cm or more. This study can be used for important reference for development of geomagnetic field sequence-based indoor positioning technology suitable for construction sites.

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GEOMAGNETIC FIELD VARIATIONS DURING SOLAR ECLIPSES AND THE GEOGRAPHIC LOCATION OF OBSERVING SITES

  • Kim, Jung-Hee;Chang, Heon-Young
    • 천문학회지
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    • 제51권4호
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    • pp.119-127
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    • 2018
  • We examine whether the solar eclipse effect is dependent on the geographic conditions under which the geomagnetic field variations are recorded. We concentrate our attention on the dependence of the solar eclipse effect on a number of factors, including, the magnitude of a solar eclipse (defined as the fraction of the angular diameter of the Sun being eclipsed), the magnetic latitude of the observatory, the duration of the observed solar eclipse at the given geomagnetic observatory, and the location of the geomagnetic observatory in the path of the Moon's shadow. We analyze an average of the 207 geomagnetic field variation data sets observed by 100 INTERMAGNET geomagnetic nodes, during the period from 1991 to 2016. As a result, it is demonstrated that (1) the solar eclipse effect on the geomagnetic field, i.e., an increase in the Y component and decreases in the X, Z and F componenets, becomes more distinct as the magnitude of solar eclipse increases, (2) the solar eclipse effect is most conspicuous when the modulus of the magnetic latitude is between $30^{\circ}$ and $50^{\circ}$, (3) the more slowly Moon's shadow passes the geomagnetic observatory, the more clear the solar eclipse effect, (4) the geomagnetic observatory located in the latter half of the path of Moon's shadow with respect to the position of the greatest eclipse is likely to observe a more clear signal. Finally, we conclude by stressing the importance of our findings.

남극 세종기지에서의 지자기 모니터링 (Geomagnetic Field Monitoring at King Sejong Station, Antarctica)

  • 김동일;진영근;남상헌;이주한
    • 지구물리
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    • 제7권1호
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    • pp.11-21
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    • 2004
  • The variation of geomagnetic field and absolute magnetic field at the geomagnetic observatory of King Sejong Station has been measured with 3-component ring core fluxgate magnetometer, proton magnetometer and D-I magnetometer. With data obtained from King Sejong Station during 2003, thediurnal and annual variations of geomagnetic field were researched and compared with those at other observatories. The deviation of daily variation of magnetic field in antarctica decreased gradually during winter season due to sun effect. The rates of componental annual variation of magnetic field at King Sejong Station were calculated using the least-square method under the assumption that the annual variation of magnetic field is linear. The rates are -55.93 nT/year in horizontal intensity, -0.87 min./year in declination, 58.30 nT/year in vertical intensity, and -69.85 nT/year in total intensity of magnetic field. A remarkable variation was caused by the magnetic storms occurred on 29~30 October, which were so powerful that the variation was observed in mid latitudes as well as high latitudes. The values of variation are generally 1500 2000 nT in Antarctica including King Sejong Station, 350 500 nT in East Asia. The measurement of absolute magnetic field shows that ring core fluxgate magnetometer has relatively large error range under cold temperature.

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거푸집공사 단계에서의 지구자기장 기반 작업자 실내측위기술 적용 방법 (Application of Geomagnetic Field-Based Indoor Positioning Technology in the Formwork Stage)

  • 김형준;이창우;김현민;안희재;이창수;조훈희
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2023년도 봄 학술논문 발표대회
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    • pp.213-214
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    • 2023
  • Positioning information of workers is important for safety management at construction sites. Among the various indoor positioning technologies, geomagnetic fields-based technology is more economical and has less error than other technologies. However, there is a problem that the installation and dismantling of materials such as formwork at construction sites can cause degradation in positioning performance. Therefore, in this study, the distortion of the geomagnetic field near euro-form was quantitatively measured and the application method of geomagnetic field-based indoor positioning technology on formwork stage was presented. The results showed that the distortion occurred within 10cm of the wall and column form, but positioning accuracy could be affected up to 60cm from the form due to the characteristic of geomagnetic field-collecting technology. Therefore, applying this technology to the formwork stage requires complementary measures, such as using other positioning techniques up to 60 cm near the formwork, or excluding distorted area when positioning. It is expected that this study can contribute to the efficient safety management of workers by suggesting ways to prevent an increase in positioning error when applying geomagnetic field sequence-based indoor positioning technology during the formwork stage.

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주공간에서 지자기장 중요성과 그 영향 (The Importance and Effect of Geomagnetic Field in Dwelling Space)

  • 한종구;장동민
    • 한국주거학회논문집
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    • 제14권6호
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    • pp.79-86
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    • 2003
  • People grow up and build up most of their character through living in dwelling space and have relax and refresh at home. Creating healthy dwelling space is being considered very important in architectural planning and design for providing comfortable living environment and improving quality of life. Many research papers and experiments indicates that the geomagnetic field affects the people and living organism. Therefore, it is necessary to investigate the geomagnetic field and people's response in dwelling space. In this study the Importance and Effect of Geomagnetic Field in dwelling space are studied through literature survey of related science field.

A Study on the Site analysis of Jongmyo area -With Feng-shui theory and Geomagnetic Field

  • Han, Jong-Koo;Park, Tong-So
    • KIEAE Journal
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    • 제2권4호
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    • pp.41-47
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    • 2002
  • East Asian explain the changes of substance happened on earth and those of human life with the conceptual frame of "Gi-ki"(地氣; earth vital energy) and organize them by the system of "Feng-shui(風水) theory. The core of Feng-shui theory is reading the expression of the nature and feeling the Gi-ki from the expression. One of the properties of the earth is that the earth has a magnetic field associated with it- the Geomagnetic field. The geomagnetic field is produced by a combination of the effects of electric currents in the earth's liquid core, the magnetization of crustal rocks, external electric current systems that surround the earth and currents induced in the outer layers of the earth by magnetic field variations. The sameness of logic between Feng-shui and geopathic zones is that both are concerned with the discrimination of site and the energy of places, in other words both disciplines are concerned with how the environment can influence people. In this context the operation of Gj-ki can be related with the effect caused by geomagnetic field on site. In this study Jongmyo(宗廟), one of the representative traditional architecture in Korea is selected because the site selection and building layout follows Feng-shui faithfully according to Taejo silok (太祖實錄, Annals of King Taejo). Observing the landforms surrounding Jongmyo, Jongmyo is apparently located in auspicious places named Gumge Poranhyoeng(金鷄抱卵形, a Feng-shui landscape of golden hen sitting on eggs). The geomagnetic investigation of Jongmyo shows that the geomagnetic values of Toekan(the space near Hyeol) are relatively high and uniform and those of Sangweoldae and Haweoldae are decreased in accordance with the distance. The result shows that there is possibility that Feng-shui has scientific basis related with geomagnetic field. Feng-shui theory can suggest a direction for designing the sustainable building for living with nature.

단독주택의 지자기장평가와 거주자에 미치는 건강에 관한 연구 (The Evaluation of Geomagnetic Field of Detached Houses and It's effect on Residence)

  • 한종구;이경희
    • KIEAE Journal
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    • 제1권1호
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    • pp.27-33
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    • 2001
  • There are many research Papers and experiments indicating that the geomagnetic field affects the people and living organism. People grow up and build up most of their character through living in dwelling space and have relax and refresh at home. Creating healthy dwelling space is being considered very important in architectural planning and design for providing comfortable living environment and improving quality of life. Therefore. it is necessary to investigate the geomagnetic field and people's response in living space. In this study the vertical component(Z value) of geomagnetic field in detached houses was measured, evaluated by related evaluation criteria, compared with interview survey.

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우리나라의 지자기장의 변화 (Variations of Geomagnetic Field in Korea)

  • 윤홍식
    • 한국측량학회지
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    • 제17권4호
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    • pp.331-338
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    • 1999
  • 본 논문에서는 1918년부터 1944년까지의 지자기관측 데이터와 전 지구 지자기장 모델을 분석하여 1918년부터 2000년까지의 지자기장의 변화에 대하여 설명한 것이다 1918년부터 1944년까지의 지자기 관측 데이터와 전지구 지자기장 모델(IGRF-95)는 전 세계 지자기데이터 센터에서 획득하였다. 본 연구결과로는 1918년부터 2000년까지의 편각의 변화량이 약 $1^\circ{50'}$으로 년 변화률은 1'20"/yr이며, 복각의 전체 변화량은 38'으로 년 변화률이 약 27"/yr로 추정되었다.yr로 추정되었다.

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