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An interface circuit designed for the load cell
Chung, Won Sup 청주대학교 산업과학연구소 2006 産業科學硏究 Vol.23 No.2
저항형 센서 브리지들을 위한 브리지 저항 편차-펄스폭 변환기를 제시한다. 이 변환기는 두 개의 전압-전류 변환기, 두 개의 전류-제어 슈미트 트리거, 하나의 램프 적분기, 그리고 두 개의 로직 게이트로 이루어져 있다. 개별 부품들을 사용하여 제작된 실험회로는 4.68 ms/Ω에 달하는 변환 감도와 ±0.03%보다 적은 선형 오차를 나타냈다. 브리지 저항 편차-펄스폭 변환기를 로드셀에 응용한 예도 제시하였다. A bridge resistance deviation-to-pulse width is presented for interfacing resistive sensor bridges. It consists of two voltage-to-current converters, two current-tunable Schmitt triggers, a ramp integrator, and two logic gates. A prototype circuit built using discrete components exhibits a conversion sensitivity amounting to 4.68 ms/Ω and a linearity error less than ±0.03 %. Its application to a load cell is also presented.
장원섭 한국직업능력개발원 2000 직업능력개발연구 Vol.3 No.1
Participation in vocational education is necessary for all adults in the era of lifelong learning. It is lack of systematic study on adult participation in vocational education in Korea. This study examined who participate in what kind of vocational education with the raw data surveyed by National Statistical Office of Korea. This study found that adult vocational education was divided by education in enterprise and job training. People who are employed, young, with high educational level, and male with high status tended more to participate in education in enterprise, while people who are male, old, with low educational level, and low status in job training. This finding may mean that adult participation in vocational education is segregated and that the opportunities are structurally differentiated according to adults' background characteristics. This study proposed more elaborate research about the implication.
高等學校數學에 位相의 導入內容에 關한 硏究 : 圖形의 位相的性質을 中心으로
蘇元燮 공주대학교 사범대학 과학교육연구소 1978 과학교육연구 Vol.10 No.1
According to the progress of mathematical education, the middle school's mathematics in our country has dealt with the topological property of figures. But. the high school's mathematics has not dealt with this topological property of figures. I conceive that the high school's mathematical education will treat this contents in the future. This treatise had treted induced contents in case of inducing the topological property of figures to the high school's mathematical education in the future. The main induced contents have composed of simplex, complex and manifold and so on by the elementary concept of Homology theory for the understanding of the high school's students.
SDR 시스템 적용을 위한 재구성 가능한 내적 연산기의 구현
소광섭,조원경,김진상 경희-다반 ASIC 설계교육센터 2006 경희-다반 ASIC센터 논문집 Vol.7 No.-
Most digital signal processing (DSP) algorithms for multimedia and communication applications require multiplication and addition operations. Especially matrix-matrix or matrix-vector the multiplications frequently used in DSP, implementations needs inner product arithmetic which takes the most processing time. Also multiplications for the DSP algorithms for software defined radio (SDR) applications require different input bitwidths. Therefore, the multiplications for inner product need to be sufficiently flexible in terms of bitwidths to utilize hardware resources efficiently. This paper proposes a novel reconfigurable inner product architecture based on a pipelined adder array, which offers increased flexibility in bitwidths of input arrays. The proposed architecture consists of sixteen 4x4 multipliers and a pipelined adder array and can compute the inner product of input arrays with any combination of multiples of 4 bitwidths such as 4x4, 4x8, 4x12, ...16x16. Experimental results show that the proposed architecture has latency of maximum 9 clock cycles and throughput of 1 clock cycle for inner product of various bitwidths of input arrays. When TSMC 0.18 urn libraries are used, the chip area and critical path of the proposed architecture are 12,613.7 gates and 2.1ns, respectively. The proposed architecture can be applied to a reconfigurable arithmetic engine for real-time SDR system designs
弱 almost periodic 函數의 性質과 Fourier 級數
蘇元燮 공주대학교 사범대학 과학교육연구소 1983 과학교육연구 Vol.15 No.1
現在까지 almost periodic 인 函數의 性質은 여러形態로 硏究되어 왔다. 이 論文에서는 al-most periodic 인 條件을 弱化시켜 weak almost periodic 인 函數를 定義하여, 이 函數의 簡單한 性質을 究明하고 調和解釋的 方法을 利用하여 이 函數의 Fourier 級數를 求하였다.
저항형 습도 센서를 위한 전류-모드 인터페이스 회로 설계
정원섭,임동빈 청주대학교 산업과학연구소 2001 産業科學硏究 Vol.19 No.1
A current-mode interface circuit has been designed for interfacing resistive humidity sensors with digital systems It accomplishes the linearization and temperature compensation of sensor characteristics The theory of operation is presented and experimental results are used to verify theoretical predictions.
圖形의 實驗的 方法에 依한 指導 : 中學校 圖形의 觀察을 中心으로 On the basis of observation of figures in junior high schools
蘇元燮 공주대학교 사범대학 과학교육연구소 1981 과학교육연구 Vol.13 No.1
The main objects of Mathematics education are to have students understand mathematical systems through grasping the basic concepts, prnciples and rules of mathematics and cultivate their attitude and ability to think logioally. Especially, in teaching of figures, it is important to made students understand the composition and characteristics of basic figures through intuitive investigation, and thus cultivate the basic ability of figure investigation. It is not supposed to be easy to be easy to let the students understand topological properties and topological transformation in teaching of figures. Now the point is how teaching can be performed for the secondary school students to understand the topological properties and transformation of figures easily. In this thesis, an attempt is made to perform teaching in topological properties and transformation of figures through experimental methods. Figures are drawn on the thin rubber plates and the students are led to understand the properties of figures intuitively by transforming the plates. Conclusively, this method mentioned in this thesis is supposed to be better than any other method, for example, the one with over head projects.