ERGONOMÍA OCUPACIONAL - SOCIEDAD DE ERGONOMISTAS ...

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Ergonomía Ocupacional. Investigaciones y Aplicaciones. Vol 3 2010 • To show the application of sensorial thermography. • To collect information about subject gender, age, mass and others. • To collect information about repetitive cycles and temperature working area. • To develop preliminary test emulating a textile industry repetitive operation. • To identify maximum stress points during the operation period and to describe symptoms detected. 3.1 The subject 3. METHODOLOGHY The subject taking in part in this study is a subject in good shape. The principal anthropometric characteristics of the subject are summarized in table 1. Table 1. Anthropometric data for the subject Age Height Mass (m) (Kg) Subject 29 1.63 60 3.2 Equipment and data analysis All the cutaneous temperatures were taken using a sensorial thermograph Sköll with a temperature range of 0˚C – 40˚C, a precision of ±.3˚C, and a resolution of 1 degree, a microporous tape (Lopez, 1992), a laptop (COMPAQ Intel Pentium Dual Core), a home heater. Programming the thermographs was possible using a program called Akela. Also a statistical program was used for data analysis (Minitab 15) and Microsoft Excel 2007. 3.3 Protocol Subjects were asked to refrain from intense exercise, caffeine, smoking, alcohol and smoking for 20 minutes prior to the experiment (Gold et al., 2004) and (Gold et al., 2009) because smoking Sociedad de Ergonomistas de México, A.C. 118
Ergonomía Ocupacional. Investigaciones y Aplicaciones. Vol 3 2010 could produce a massive reduction of body temperature and alcohol a raise of body temperature. Previous studies have demonstrated that the corporal temperature stabilization takes about 20 minutes due to a reduction on body metabolism (E.Y.K NG y Sim en E.Y.NG et al., 2008). Having the opportunity to use a home heater we warmed up the room temperature for the experiment between 20-25 degrees (E.Y.K NG et al., 2005), Once we warmed up the room, the participant was seated in an ergonomic chair with arm rest and then stick the sensorial thermographs in both wrist, close to the median nerve region. After that, the subject was asked to rest both arms in a flatbed at the ribs height (Kroemer et al., 2001) for about twenty minutes. The next step in the experiment protocol was to simulate a highly repetitive operation executed in the textile industry for about 3.5 hours, this period of time representing the longest period of the workday. The operation involved several movements like reach, take, place and many others. Several pain symptoms were identified during the experiment. Finally, the sensor thermographs were removed from both wrist and then analyze the results. 4. RESULTS The results of all pain symptoms detected during the experiment developed are shown in table 2. These anomalies were given off by the subject while he was doing the repetitive task. It was so important to write down the hour, minute and second, so we could link this info to the temperatures. Preliminary 1 Preliminary 2 Preliminary 3 Preliminary 4 Table 2. Anomalies detected in the operator Right shoulder pain x Left shoulder pain Lower back pain Upper back pain Right wrist pain x x x x x x x x x x x Right palm pain Sociedad de Ergonomistas de México, A.C. 119
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ERGONOMÍA OCUPACIONAL INVESTIGACIO
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ERGONOMÍA OCUPACIONAL INVESTIGACIO
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Prefacio La Sociedad de Ergonomista
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ERGONOMICS AND EDUCATION Ergonomía
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Ergonomía Ocupacional. Investigaci
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3.1 Programming stage Ergonomía Oc
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(DINBelg) 4. Percentiles are calcul
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5. CONCLUSIONS Ergonomía Ocupacion
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