http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Kumari Anshu (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Kumari Anshu,Raheman Hifjur 한국농업기계학회 2023 바이오시스템공학 Vol.48 No.4
Purpose Improper selection of gear and throttle position during tillage operation affects soil pulverization and increases fuel consumption. The objective of this study was to carry out soil tillage with a tractor drawn rotavator by selecting optimum gear and throttle position by giving warning to the operator when wheel slip, velocity ratio (u/v), and load on the engine are not in the optimum range and advising the operator to control the tillage operation as well as load on the engine. Methods An embedded advisory system comprising sensors, microcontroller, and display units was developed. During tillage operation, data were obtained on wheel slip, u/v, throttle position, and engine speed through the developed sensing units, and they were compared with the optimum range of wheel slip, u/v, and engine speed using the embedded advisory system. Then the operator was warned and advised to adjust gear and throttle position so that the engine speed could be always maintained within governor control range as well as both wheel slip and u/v within the optimum range. The developed embedded advisory system was validated by comparing fuel consumption per hectare (FEI) incurred while carrying out tillage at depths 80 and 120 mm with different combinations of operating parameters (throttle and gear selection) and with operating parameters as advised by the advisory system. Results Results showed that wheel slip, u/v, and drop in engine speed were influenced by gear and throttle settings and depth of operation. It was also observed that there was a significant increase in fuel consumption with increase in depth of operation, throttle opening, and shifting of gear from L1 to L3. There was 12 to 85% increase in fuel consumption when carrying out tillage at different combinations of throttle setting and gears other than the advised operating parameters. Conclusions The FEI was found minimum for a selective combination of operating parameters at both depths of operation. The developed system could identify the combination of operating parameters at both the depths of operation at which wheel slip, u/v, and engine load were within the optimum range resulting in minimum FEI.
-
Kumari Anshu,Raheman Hifjur 한국농업기계학회 2024 바이오시스템공학 Vol.49 No.1
Purpose Measurement of draft is important for designing and testing a tillage implement or seeding machinery. This study aimed to develop an instrumentation setup which can be mounted between any category of tractor and diff erent tillage implements for accessing real-time draft values while carrying out tillage. Methods A novel draft sensing device was developed along with lower hitch attachment for diff erent categories of tractor and implement by measuring horizontal force at each hitch point using three force sensing units. The force sensing unit comprised an S-type loadcell packed between two U-shaped frame and a microcontroller-based data acquisition system. The fi nite element (FE) simulation was made to examine safety of the designed structure. Results The FE simulation result showed that stress induced on each element of force sensing unit was lesser than the yield strength of the material. The developed draft sensing device was tested both in the laboratory and in the fi eld during tillage operation. The signals received from force sensing units were observed to be varied linearly with the applied load with negligible hysteresis losses. Conclusion The draft values measured by the developed draft sensing device were found to be accurate with mean absolute percentage error (MAPE), root mean square error (RMSE), and maximum absolute error (MAE) of 4.39%, 8.83 kg, and 7.14%, respectively.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
