• Proceedings of the Korean Environmental Sciences Society Conference
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• 2004.05a
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• pp.29-31
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• 2004

현재까지 진행된 연구는 새로운 검정 장비를 이용하여 개발된 우량 측정 메카니즘을 검정하였다. 그리고 중량식 우량계를 별도 제작하여 야외에서 정확한 우량 비교 검정을 위해 일본 쯔쿠바 대학 TERC노장에 설치하여 다음과 같은 결과를 얻을 수 있었다. 장기간 로드셀의 특성을 조사한 결과 장시간에 안정성이 입증되어 다양한 측정 장비 개발에 사용 가능함이 밝혀졌다. 새로운 검정 장비는 1 분 간격으로 정확한 강우량을 측정 할 수 있어 높은 분해능의 우량계를 검정할 수 있는 새로운 방안을 제시하였다. 본 연구의 가장 중요한 목표인 0.01 mm 급 우량 측정 메카니즘을 완성하였으며, 전도형 우량계가 가지고 있는 분해능 한계와 중량식 우량계가 갖는 배수의 문제점을 극복하였다 그리고 현업, 도시 수문, 토목 등의 여러 분야에서 요구하는 실시간 강우강도 관측 과 정확한 우량 측정이 가능한 우량계를 제작 할 수 있게 되었다. 본 연구에서 개발된 Lee-A type 우량계에 사용하는 접점신호와 로드셀의 중량 신호는 기존의 자동관측장비에 완벽한 호환성이 있어 적용에 문제점이 없다. 국내에서도 장비 개발이 충분히 될 수 있음을 알 수 있었으며, 새로운 장비 개발에 대한 가능성을 볼 수 있었다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.19 no.4
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• pp.67-80
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• 2020

High-speed weigh in motion (HS-WIM) is a real-time unmanned system for measuring the weight of a freight-carrying vehicle while it is in motion without controlling vehicle traffic flow or deceleration. In Korea, HS-WIM systems are installed on the national highways and general national ways for pre-selection by law enforcement. In this study, to improve the measurement accuracy of HS-WIM, we devise improvements to the existing integral and peak weight conversion algorithms, and we provide a new fusion algorithm that can be applied to the mat-type HS-WIM. As a result of analyzing vehicle driving tests at a real site, we confirmed the highest level of weight-measuring accuracy.

• Proceedings of the KIEE Conference
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• 2003.07d
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• pp.2477-2479
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• 2003

본 연구에서는 타이어의 중량 불균일 측정을 위한 메카니즘의 모델링 및 분석을 통해 로드셀에 의해 샘플링된 신호를 해석하여 불균일량을 측정하는 방법을 제안한다. 진동역학적인 모델을 근거로 신호의 변환과 영향계수의 산출을 통해 정확한 불균형량 측정을 가능하게 하였다.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.7 no.1
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• pp.11-18
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• 1989

Observations to precise levelling nets contain different types of error because it has been caried out with various instruments and techniques, and also completed through long period. In order to establish a precise levelling nets, therefore, the weight function has to be selected adequately in the adjustment of nets. The purpose of the study is to determine a suitable weight function for the first order geodetic levelling nets in Korea and, therefore, the various numerical tests are performed with different statistical error models. The result of the study shows that the weight function, W＝1/$L^2$ is more efficient than W＝1/L in the first order levelling nets in the Korea.

• The Korean Journal of Zoology
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• v.6 no.1
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• pp.9-14
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• 1963

S.M.계인 마우스♂♀를 정상군과 4개의 실험군 즉 양성가속도(5G-50초간과 11G-50초간 매일 각각 폭로) 및 전격(5volt-2초간과 10 volt 2 초간 매일 각각 전격)군으로 나누어 최소한 22일간 순화시킨 후 여지 전지영동법에 의해서 Albumin/Globulin 바와 단백질분할을 측정하고 또한 혈청 전단백질, 혈색소량, Hematocrit 비, 적혈구포약성 및 간, 신장의 중량을 측정하였다. A/G 와 전단백질은 양성가속도의 G-force 증가와 전격적 증가의 각군이 정확군보다 유의하게 현저히 낮은 치를 나타내고 있다. 간장중량, 혈색소량 및 Hematocrit 비는 또한 정상군보다 양성가속도, 전격적 각 조건하에서 낮은 치를 나타내고 있다. 그러나 신장중량은 현저히 증가된 치를 나타낸다. 양성가속도와 전격적조건군의 간장의 조직학적 소견은 혈관적 변화가 나타나고 그리고 양성가속도에서는 또한 액포가 출현하였다. 적혈구 포약성은 거의 변화가 없었다. 이상의 결과로 미루어보아 상기 두 효과로 인해서 주로 간장기능 즉 단백질대사에 이상을 초래하는 것으로 생각된다.

• Journal of Intelligence and Information Systems
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• v.28 no.2
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• pp.263-278
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• 2022

With the recent advent of IoT technology, automatic pet feeders are being distributed so that owners can feed their companion animals while they are out. However, due to behaviors of pets, the method of measuring weight, which is important in automatic feeding, can be easily damaged and broken when using the scale. The 3D camera method has disadvantages due to its cost, and the 2D camera method has relatively poor accuracy when compared to 3D camera method. Hence, the purpose of this study is to propose a deep learning approach that can accurately estimate weight while simply using a 2D camera. For this, various convolutional neural networks were used, and among them, the ResNet101-based model showed the best performance: an average absolute error of 3.06 grams and an average absolute ratio error of 3.40%, which could be used commercially in terms of technical and financial viability. The result of this study can be useful for the practitioners to predict the weight of a standardized object such as feed only through an easy 2D image.

• Journal of the Korean Geotechnical Society
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• v.33 no.11
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• pp.5-19
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• 2017

This study has been conducted to improve the conventional compaction management method by measuring the water content and dry unit weight of soil using the Time Domain Reflectometry (TDR) method. In order to verify the measured value of the developed flat TDR system, laboratory tests were conducted on six soils. Also, based on laboratory experiments, field tests were conducted to evaluate the applicability of the developed flat TDR system. Also, a comparison experiment was conducted with the Purdue TDR system. In addition, FE analysis was done to confirm the influence range of the Flat probe. As a result, it was confirmed that the influence range was about 10 cm. As a result of laboratory experiment, the water content ratio showed an error of about 0.4% on the average, and in the case of dry unit weight, it showed an error of about 1.6%. For the field test, the water content ratio and unit weight showed an error of 0.8% and 2.5%, respectively. Through the experimental results, it was confirmed that the measured value of the Flat TDR system is more accurate than that of the conventional TDR system.

• Journal of the Korean Institute of Intelligent Systems
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• v.23 no.5
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• pp.436-443
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• 2013

This paper presents design methods of a fuzzy controller and an operator model for a wire-driven heavy material lifting system helping human workers. The wire-driven heavy material lifting system is a kind of human-assistive systems in which a human is involved in the control loop. Thus, human's control characteristics and requirement of reducing worker's force to lift a heavy material are considered in the design process of the proposed fuzzy controller. An automatic weight measurement algorithm during the early stage of lifting is also introduced. Finally, the effectiveness and performance of the proposed system are proved by experiments.

• Proceedings of the Membrane Society of Korea Conference
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• 1998.04a
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• pp.49-52
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• 1998

1. 서론 : 화약이나 고체 충진제, 고체로\ulcorner 추진제의 산화제, slurry blasting agent 및 동물사료의 식품첨가제로 사용되고 있는 과염소산은 발화나 폭발성이 매우 강한 산화제로 정확한 순도를 측정하는 것은 중요하다. 용량분석법과 중량분석법에 비교하여 조작이 간단하고 편리한 과염소산이온의 농도를 직접 측정할 수 있는 PVC막 전극에 대한 많은 연구가 진행되고 있다. (생략)

• Journal of Animal Science and Technology
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• v.49 no.2
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• pp.203-212
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• 2007

Means measuring carcass cut traits in live pigs is needed to genetically improve the production of favorite cuts in swine. The data of body measurements as well as carcass traits were collected from 432 heads of 4 crossbred lines. Weights of most parts and percentages of belly and boston in carcass were significantly influenced by days to slaughter. Most of off test body measurements show higher correlations with carcass cut traits than body measurements of on test and market do. The multiple regression equations for estimation of carcass cut traits by off test body measurements have higher accuracy than by body measurements of on test and market. The coefficients of determination in estimation of polynomial regression with off test body measurements after adjustments of carcass cut traits for days to market were ranged 0.59 to 0.68 and 0.33 to 0.43 in weights and percentages of carcass cuts, respectively. Develop- ment of an excellent Korean type seed stock for favorite cuts can be expected, if the estimation of carcass cut traits for live animals is implemented in swine genetic improvement program.