Abstract:
PURPOSE: A portable nutrient solution analysis device is provided to analyze a nutrient solution by being carried conveniently in a field, and to improve an accuracy of an analysis, a use convenience, and a size and portability. CONSTITUTION: A portable nutrient solution analysis device comprises a measuring terminal (100), a control unit (240), and an analysis device main body (200). The measuring terminal reacts to an ion of a different component included in a nutrient solution. The measuring terminal comprises multiple selectivity measuring electrodes which generate an electric signal, and a standard electrode as one gathered form. The control unit is connected with the measurement terminal either with or without wire. The control unit transmits and analyzes the electric signal obtained from the measuring electrodes. A density value of each component is calculated. The analysis device main body comprises a display unit (250) indicating a content analyzed in the control unit. [Reference numerals] (100) Measuring terminal; (210) Input and output interface unit; (220) Amplification unit; (230) Signal conversion unit; (240) Control unit; (250) Display unit; (260) Power supply unit
Abstract:
The present invention relates to a leafy vegetable harvesting device and a leafy vegetable harvesting robot with the same which can safely encase and move raised leafy vegetables, such as lettuce, without the damage, by simultaneously cutting the leafy vegetable and confining it. The leafy vegetable harvesting device includes a base; a pair of cutters having each one end portion hinged at a position symmetrical to left and right sides at the front end of the base, and moved opposite to each other to cut the bottom part of the leafy vegetables; and a gripper provided above the cutters and connected to the cutters at one portion thereof to be pivoted, wherein when the cutters are closed to cut the leafy vegetable, the gripper moves in a circumferential direction of the vegetable to encase the surrounding thereof.
Abstract:
PURPOSE: A device for measuring a plural ion-selective electrodes array adapting applicative ion concentration, a device for testing electrode performance, a method for measuring an ion concentration, and a method for testing an ion-selective electrode performance are provided to compare and analyze the performance of each sensor by mounting various sorts of sensors reacting to specific ions at the same time, thereby efficiently obtaining a sensor development through a performance test of an ion-selective electrode. CONSTITUTION: A device for measuring a plural ion-selective electrodes array adapting applicative ion concentration comprises buckets(1), a rinse bucket(2), an ion concentration measuring part, a signal converter(6), a receiver(7), a sample solution feeding line(8), a pump(9), a valve(10), a washing liquid feeding line(11), a valve(12), a spinning motor(13), a motor controller(14), and a computer(15). The bucket accommodates the sample solution. The rinse bucket accommodates the washing liquid. The ion concentration measuring part is composed of a plurality of ion-selective electrodes(4) and a reference electrode(5). The signal converter converts analog signals obtained from the ion-selective electrodes of the ion concentration measuring part in to digital signals. The receiver is installed in the lower part of the ion concentration measuring part to be rotated. The sample solution feeding line supplies the sample solution to the receiver side from the bucket.
Abstract:
본 발명은 토양의 수분장력을 근거로 이루어지는 능동형 관수 제어방법 및 관수 제어장치에 관한 것으로, 토양의 수분장력을 텐시오미터로 측정하여 정확한 시점에 관수를 개시하고 재배작물에 따라 토양에 필요한 최적의 관개수량을 결정하며, 공급관의 압력손실률을 고려하여 관수시간을 결정함으로써 최적의 관수가 이루어질 수 있다. 이러한 본 발명은 관수 제어방법의 경우, 토양에 수분을 공급하기에 앞서 토양의 수분장력을 측정하는 제1단계와; 상기 토양의 수분장력 값이 재배하는 작물에 따른 목표치에 도달하였는지 여부에 대한 판정이 이루어지는 제2단계와; 상기 토양의 수분장력 값이 상기 목표치에 미달하는 경우, 토양의 수분장력 값을 수분함량 값으로 변환하는 제3단계와; 상기 수분함량 값을 이용하여 토양에 필요한 필요 관개수량을 결정하는 제4단계와; 토양에 수분을 공급하는데 사용되는 수분 공급관의 시작단과 끝단의 수압을 각각 측정 및 비교하여 공급관의 압력손실률을 계산하는 제5단계와; 상기 필요 관개수량에 비례하고, 상기 공급관에 따른 공급유량 및 상기 압력손실률에 반비례하도록 관수시간을 결정하는 제6단계와; 상기 제6단계에서 결정된 관수시간동안 상기 토양에 수분을 공급하는 제7단계를 포함하여 이루어진다.