ERGONOMIC STUDIES ON CONTROLS LAYOUT, DRIVERS ANTHROPOMETRIC AND NOISE EXPOSURE FOR EGYPTIAN FARM TRACTORS | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 9, Volume 28, Issue 4, October 2011, Page 898-916 PDF (678.58 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2011.102600 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. A. Eltawil1; R. A. Hegazy2 | ||||
| 1Assoc. Prof., Agric. Eng. Dept., Kafrelsheikh Univ., Egypt. | ||||
| 2Assistant Prof., Agric. Eng. Dept., Kafrelsheikh Univ., Egypt. | ||||
| Abstract | ||||
| Tractor driving imposes a lot of physical and mental stress upon the operator. Operator’s seat and noise are two of the detrimental factors that lead to unhealthy working conditions for the tractor operator. The optimal design of tractor seat and presence of cabin may be achieved by integrating anthropometric data with other technical features of the design. This paper describes the common Egyptian farm tractor controls layout such as foot brake, foot clutch, foot accelerator (throttle lever), steering wheel, PTO controller, hand brake, hydraulic lever, gear lever and light control buttons. Comparison of noise exposed on the operators of the farm tractors with and without a cabin is investigated.The sound levels (dB) were measured at ear level of the operators. Measurements of anthropometric data were also conducted to match and evaluate the existing main controls layout with driver body dimensions. A two-dimensional measuring device was constructed to measure the tractor controls layout. The measurements were taken as forward horizontal distance and vertical distance from seat reference point (SRP). Observed data indicated that there are large variations in the controls layout on horizontal and vertical axes for different tractor models. Also, large variation was obtained from anthropometric data and responses of drivers. The design of an operator workplace on mobile equipment is frequently a compromise because of conflicting requirements for the limited space available. The use of a cabin was useful in the insulation of the noise, particularly at higher frequencies (under load). The noise levels reached 90 dB when using tractors without cabins compared to 81 dB only incase of tractors mounted cabins. The measured noise levels varied also with increasing tractor forward speed as well as load conditions. In addition; cabins protects the operator from the factors having detrimental effects on the working efficiency such as high temperature and dusty environment. Therefore, mounting of cabins on the tractors currently being used without a cab in rental system in Egyptian farms is highly recommended to provide healthy working conditions for their operators. | ||||
| Keywords | ||||
| Ergonomic; Tractors; Controls Layout; Anthropometric Noise level; Cabin | ||||
| References | ||||
|
ASAE (2004). Operator controls on agricultural equipment. Paper no. S335. 4 FEB2004 : 189:192. Niles Rd., St. Joseph, USA (www.asae.org).
Baker, W. (2005). Farm machinery guarding: A practical guide, Australian Centre for Agricultural Health and Safety. P: 8-14.
Day L., M. Scott, R. Williams, G. Rechnitzer, P. Walsh, S. Boyle (2005). Development of the Safe Tractor Assessment Rating System. Journal of Agricultural Safety and Health 11(3): 353−364.
FAO (2008). FAO Statistics Division. Resource STAT-Machinery. Accessed in 06 April 2011.
Grandjean, E. (1988). Fitting the Task to the Man. A Textbook of Occupational Ergonomics. Taylor & Francis Ltd, London. P: 78-80.
Haslegrave C.M. (1979). An anthropometric survey of British drivers. Ergonomics 22(2): 145-153.
Hsiao, H., B. Bradtmiller, and J. Whitestone (2003). Sizing and fit of fall-protection harnesses. Ergonomics, 46: 1233 – 1258.
Hwang S.A., M.I. Gomez, L. Sobotova, A.D. Stark, J.J. May, E.M. Hallman (2001). Predictors of hearing loss in New York farmers. Am J Ind Med 40:23–31.
IEC (1985). Standard 804: Sound Level Meters. International Electrotechnical Commission (IEC). P:1
ISO (1995). Standard 11202: Acoustic-noise emitted by machinery and equipment-measurement of emission sound pressure levels at a work station and at other specified positions-survey method in situ. International Organization for Standardization (ISO), Switzerland.
Kumar A., G. Bhaskar, J.K. Singh (2009). Assessment of controls layout of Indian tractors. Applied Ergonomics 40: 91–102.
Liljedahl, J.B., P.K. Turnquist, D.W. Amith, and M. Hoki (1996). Tractors and their power units: 226 – 231 (St. Joseph, MI: ASAE).
Mehta, C.R., L.P. Gite, S.C. Pharade, J. Majumder and M.M. Pandey (2008). Review of anthropometric considerations for tractor seat design. Int. J. Indust. Ergonomics 38: 546–554.
Patel, R., A. Kumar, D.Mohan (2000). Development of ergonomic evaluation facility for Indian tractors. Applied Ergonomics v 31, 311–316.
Pheasant, S.T., C.M. Harris (1982). Human strength in the operation of tractor pedals. Ergonomics 25, 53–63.
Sjoflot L. (1982). The tractor as a work place. Ergonomics 25(1): 11-18.
Viren M. V., Saswati Nath, AjayVerma (2002). Anthropometric surveyof Indian farm workers to approach ergonomics in agricultural machinery design. Applied Ergonomics 33:579–581.
Walsh, P. A., L. Day, and M. Scott. (2003). A tractor safety rating system. In Proc. Ag. Equip. Tech. Conf. ASAE, St. Joseph, Mich. | ||||
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