농업용 이동편의장치를 위한 발로 미는 힘을 감지하는 센서 구현
Implementation of a Sensor to Detect the Foot-pushing Force for an Agricultural Transport-convenience Vehicle
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초록
In this paper, we propose a sensor with a C-shaped load cell to detect force change when a person sitting on the chair in an electrical transport-convenience vehicle is pushing ground by both heels. The load cell built in the vehicle is mechanically deformed by the vertical force owing to the human weight and the horizontal force by ground-pushing feet. The deformation rate of the load cell and its distribution are simulated using finite element analysis. In the simulation, the applied loads are preset in the range of 10 kg - 100 kg with a step size of 10 kg, and the ground-pushing force by feet is increased to 40 N with a step size of 5 N with respect to each applied load level. The resistance change of the load cell was observed to be linear in simulation as well as in measurement. the maximum difference between simulation and measurement was 0.89 % when the strain gauge constant was 2.243. The constant has a large influence on the difference. The proposed sensor was fabricated by connecting an instrument amplifier and a microcontroller to a load cell and used todetect the force by ground-pushing feet. To detect foot driving, the reference signal was set to 130% of the load, and the duration of the sensor output signal exceeding the reference signal was set to 0.6 s. In a test of a vehicle built with the proposed sensor, the footpushing force by the worker could be successfully detected even when the worker was working.
Abstract
In this paper, we propose a sensor with a C-shaped load cell to detect force change when a person sitting on the chair in an electrical transport-convenience vehicle is pushing ground by both heels. The load cell built in the vehicle is mechanically deformed by the vertical force owing to the human weight and the horizontal force by ground-pushing feet. The deformation rate of the load cell and its distribution are simulated using finite element analysis. In the simulation, the applied loads are preset in the range of 10 kg - 100 kg with a step size of 10 kg, and the ground-pushing force by feet is increased to 40 N with a step size of 5 N with respect to each applied load level. The resistance change of the load cell was observed to be linear in simulation as well as in measurement. the maximum difference between simulation and measurement was 0.89 % when the strain gauge constant was 2.243. The constant has a large influence on the difference. The proposed sensor was fabricated by connecting an instrument amplifier and a microcontroller to a load cell and used todetect the force by ground-pushing feet. To detect foot driving, the reference signal was set to 130% of the load, and the duration of the sensor output signal exceeding the reference signal was set to 0.6 s. In a test of a vehicle built with the proposed sensor, the footpushing force by the worker could be successfully detected even when the worker was working.
참고문헌 (15)
- 이경숙, "인간공학적 작업개선을 위한 농업인 안전 기술 동향 연구", 대한인간공학회지, 29(2), pp.225~239 (2010), 대한인간공학회
- O. Ahn, "Development of a Harvesting Carrier for Improving Red Pepper Harvesting Transport", Korea Soc. for Community Living Sci. Conf. Proc, pp.129~131 (2002)
- 조용준, "노지 밭고랑 환경 적용을 위한 자율조향 플랫폼 개발", 한국기계가공학회지, 20(9), pp.70~75 (2021), 한국기계가공학회[DOI]
- S. Jang, "Development of a convenient device for harvesting red pepper in the open field", M. S, pp.2018
- J. Kim, "The Study about the Hall Sensor Type Torque Sensor for Electric Bike", Proc. of Korean Soc. Automot. Eng. Branch Conf, pp.12~14 (2013)
- 이대희, "홀센서 집게형 맥진기와 심전도-용적맥파계를 이용한 한양방 융합용 환자감시장치 개발연구", 한국자기학회지, 23(4), pp.135~143 (2013), 한국자기학회
- S. H. Cho, "Development of Data Acquisition System for Strain Gauge Sensor", J. Ind. Technol, 30(A), pp.89~93 (2010)
- J. W. Joo, "Strain Analysis and Calibration Test of Small Capacity Torque Sensor", Trans. Korean Soc. Mech. Eng, 23(3), pp.382~391 (1999)
- C. Y. Lee, "Finite Element Analysis of Nonlinear Behavior of a Column Type Sensing Element for Load Cell According to Design Parameters", Trans. Korean Soc. Mech. Eng, 24(6), pp.1540~1546 (2000)
- 강대임, "대용량 Compact형 로드셀의 기둥형 감지부 설계 및 해석", 대한기계학회논문집 A, 27(4), pp.601~607 (2003), 대한기계학회
- D. -I. Kang, "Stress Measurements Using Strain Gages", J. KSME, 33(7), pp.661~670 (1993)
- K. W. Nam, "A Study on Design of Hook-Type Finger Force Measuring System", M. S, pp.2015