• 제목/요약/키워드: Grain Sorter

검색결과 5건 처리시간 0.017초

곡물선별기의 선별력 향상을 위한 근거리적외선 영상보드 개발 (Development of Near Infrared Radiation Image Board for Performace Improvement of Grain Sorter)

  • 이채욱
    • 융합신호처리학회논문지
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    • 제18권1호
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    • pp.25-30
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    • 2017
  • 현재 곡물선별기는 대부분 CCD 광학카메라를 이용하여 불량품을 찾아내고 있다. 본 논문에서는 CCD 카메라를 이용함과 동시에 근거리적외선 센서의 수분측정 방법을 추가하여 곡물선별기의 선별력향상을 목표로 한다. 그리고 구현한 알고리즘을 곡물선별기에 실제로 적용할 수 있도록 근거리적외선 영상보드 시스템을 개발하여, 원료의 내부 수분 함량을 고속으로 체크하여 일정함량 미달인 경우 불량으로 간주하여, 불량품을 실시간으로 제거하는 곡물선별기 시스템을 개발하고자 한다.

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색채선별기 이용한 남부평야지 조기재배 해담쌀의 품질향상 (Improvement of Rice Quality Using Grain Color Sorter During Early Transplanting Cultivation in the Southern Plain of Korea)

  • 이종희;이지윤;이소명;신동진;차진경;조준현;권영호;조수민;박동수
    • 한국작물학회지
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    • 제65권2호
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    • pp.79-83
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    • 2020
  • 본 연구에서 남부 평야지 조기재배 조건에서 생산된 쌀을 색채선별기를 이용한 쌀의 외관특성 향상과 밥맛의 향상을 위해 품질관련 특성을 분석하였다. 해담쌀 백미를 색채선별기에 2회 통과하여 등급별로 분류한 결과, A급은 64.8%, B급 18.0%, C급 17.2%이였다. 분류등급별 쌀을 백미완전미율을 분석한 결과, A급은 72.9%로 색채선별전 쌀 48.4%보다 약 25.4%정도 향상되었다. B등급과 C등급은 원료곡보다 완전미율이 낮았다. 쌀의 백도는 A등급이 45.3으로 색채선별전의 원곡보다 1.7정도 낮아졌다. 색상색차계 적색도 a값은 색채선별전 대비구에 비해 유의하게 낮았다. 아밀로스 함량과 단백질 함량은 색채선별 전후 유의한 차이가 없었으나, 쌀의 호화특성은 정상립으로 분류된 A등급은 최고점도와 최종점도가 각각 266.1RVU와 215.9 RVU로 색채선별전보다 높았고, 밥의 윤기치에서도 68.8로 색채 선별전보다 증가하였다. 이 결과로 볼 때 평야지 조기재배 조건에서 생산된 쌀을 색채선별기를 이용한 쌀의 외관특성을 분류함으로써 완전미율과 밥맛이 향상될 수 있을 것으로 기대된다.

벤더형 고응답 압전밸브의 주파수 특성에 관한 연구 (A Study on Frequency Characteristics of a Bender Type High-Speed Piezoelectric Pneumatic Valve)

  • 윤소남;함영복;박중호;이성수
    • 드라이브 ㆍ 컨트롤
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    • 제9권4호
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    • pp.14-18
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    • 2012
  • Two kinds of piezoelectric actuator are applied to the valve for controlling the direction, the flow and the pressure of the fluid. One is a stack type piezoelectric actuator which has very fast response characteristics but very tiny displacement. The other is a bender type piezoelectric actuator which has also fast response characteristics but lower than the stack type one, and has longer displacement than the stack type one. So, the bender type piezoelectric actuator has advantage to apply to the valve for controlling a large amount of flow and fast on-off operating. In this study, the bender type piezoelectric pneumatic valve for color sorter is designed and fabricated. The new type high speed piezo valve with the both side supporting mechanism for high operating frequency and high reliability is discussed for separating the foreign body from the grains. Finally, the performance characteristics of a fabricated valve are analyzed and the frequency characteristics are also discussed for substituting the conventional type solenoid actuator.

쌀의 품질평가 현황과 금후 연구방향 (Trend and Further Research of Rice Quality Evaluation)

  • 손종록;김재현;이정일;윤영환;김제규;황흥구;문헌팔
    • 한국작물학회지
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    • 제47권
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    • pp.33-54
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    • 2002
  • Rice quality is much dependent on the pre-and post harvest management. There are many parameters which influence rice or cooked rice qualitys such as cultivars, climate, soil, harvest time, drying, milling, storage, safety, nutritive value, taste, marketing, eating, cooking conditions, and each nations' food culture. Thus, vice evaluation might not be carried out by only some parameters. Physicochemical evaluation of rice deals with amy-lose content, gelatinizing property, and its relation with taste. The amylose content of good vice in Korea is defined at 17 to 20%. Other parameters considered are as follows; ratio of protein body-1 per total protein amount in relation to taste, and oleic/linoleic acid ratio in relation to storage safety. The rice higher Mg/K ratio is considered as high quality. The optimum value is over 1.5 to 1.6. It was reported that the contents of oligosaccharide, glutamic acid or its derivatives and its proportionalities have high corelation with the taste of rice. Major aromatic compounds in rice have been known as hexanal, acetone, pentanal, butanal, octanal, and heptanal. Recently, it was found that muco-polysaccharides are solubilized during cooking. Cooked rice surface is coated by the muco-polysaccharide. The muco-polysaccharide aye contributing to the consistency and collecting free amino acids and vitamins. Thus, these parameters might be regarded as important items for quality and taste evaluation of rice. Ingredients of rice related with the taste are not confined to the total rice grain. In the internal kernel, starch is main component but nitrogen and mineral compounds are localized at the external kernel. The ingredients related with taste are contained in 91 to 86% part of the outside kernel. For safety that is considered an important evaluation item of rice quality, each residual tolerance limit for agricultural chemicals must be adopted in our country. During drying, rice quality can decline by the reasons of high drying temperature, overdrying, and rapid drying. These result in cracked grain or decolored kernel. Intrinsic enzymes react partially during the rice storage. Because of these enzymes, starch, lipid, or protein can be slowly degraded, resulting in the decline of appearance quality, occurrence of aging aroma, and increased hardness of cooked rice. Milling conditions concerned with quality are paddy quality, milling method, and milling machines. To produce high quality rice, head rice must contain over three fourths of the normal rice kernels, and broken, damaged, colored, and immature kernels must be eliminated. In addition to milling equipment, color sorter and length grader must be installed for the production of such rice. Head rice was examined using the 45 brand rices circulating in Korea, Japan, America, Australia, and China. It was found that the head rice rate of brand rice in our country was approximately 57.4% and 80-86% in foreign countries. In order to develop a rice quality evaluation system, evaluation of technics must be further developed : more detailed measure of qualities, search for taste-related components, creation and grade classification of quality evaluation factors at each management stage of treatment after harvest, evaluation of rice as food material as well as for rice cooking, and method development for simple evaluation and establishment of equation for palatability. On policy concerns, the following must be conducted : development of price discrimination in conformity to rice cultivar and grade under the basis of quality evaluation method, fixation of head rice branding, and introduction of low temperature circulation.