Occupational risks related to vibrations using a brush cutter for green area  management

Bernardi, Bruno; Quendler, Elisabeth; Benalia, Souraya; Mantella, Antonio; Zimbalatti, Giuseppe

doi:10.26444/aaem/75684

Cited by 18 publications

(15 citation statements)

References 12 publications

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“…For DGH, the highest acceleration peaks were recorded at the 315 Hz frequency on the Y axis, with 24.2 ms -2 for the right hand and 14.3 ms -2 on the left hand using DGH-2TB ( Figure 8E and F). Bernardi et al (2018), performing a study on occupational vibration in the use of brush cutters in green areas, also used equipment with double Grip and observed the greatest accelerations in the Y axis, differing from the present study in frequency and peak magnitude.…”

Section: Resultscontrasting

confidence: 98%

Occupational Exposure to Localized Vibrations Using Portable Mechanical Brush Cutter in Coffee Crop

Júnior

Silva

Cunha

et al. 2019

C.Sci.

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The use of portable brush cutter may expose workers to localized vibrations, from the transfer of mechanical vibration of the tool to the operator’s hands and arms. With this in mind, the objective in this study was to quantify the levels of occupational vibration transmitted to the hands and arms of the portable brush cutter operators under routine working conditions in the coffee crop. The vibration levels transmitted to the operator’s hands were measured during activity with portable brush cutters. The experimental design was completely randomized (CRD) in a factorial scheme (2 x 2) combined with two types of grip (Circular cable (CC) and double grip handle (DGH) with two types of tip cutting blades (2TB and 3TB). The data acquisition occurred from the use of the vibration meter SV 103, SVANTEK with triaxial accelerometer, installed on each of the worker’s hand at the contact point with the tool. The results demonstrated that the 2.5 ms-2 action level determined by NR 09 and NHO 10 was exceeded under all conditions of the present study. The highest accelerations were quantified in the operation of the brush cutter equipment with CC, reaching the daily exposure limit of 5 ms-2 allowed for an 8-hour of working day. The resulting acceleration of the DGH equipment was on average 37.45% lower than the operation with the CC equipment. The results bring indicatives of occupational advantages in the selection of these types of accessories for brush cutters, in order to mitigate the effects of exposure to HAV in extended use situations

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Section: Resultscontrasting

confidence: 98%

Occupational Exposure to Localized Vibrations Using Portable Mechanical Brush Cutter in Coffee Crop

Júnior

Silva

Cunha

et al. 2019

C.Sci.

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“…1-2 cm, as far as possible from the muscle motor points and muscle tendons, lengthwise relative to the muscle fibre sEMG signals have individual differences, if authors want to compare and analyze different participants and different muscles, it is necessary to standardize the sEMG signals. The method is as shown in formula (1), in which the actual measured EMG amplitude (RMS ACT ) is expressed as a percentage of the sEMG amplitude (RMS MVC ) during maximum spontaneous contraction, namely MVE% [18,19].…”

Section: Methodsmentioning

confidence: 99%

“…RMS ACT × 100% RMS MTC (1) where: MVE% -the muscle load in this action or posture is equal to the percentage of maximum voluntary contraction, RMS ACT -actual measured myoelectric amplitude, RMS MVC -myoelectric amplitude during maximum voluntary contraction.…”

Section: Mve% =mentioning

confidence: 99%

“…Meanwhile, famers frequently use brush cutter to harvest grasses and crops. However, when the operators prolonged exposure to the natural environment, their workload will increase due to the bearing weight, vibration and noise generated mainly from the rotating engine, which can provoke working fatigue, occupational diseases and even working accidents [1][2][3][4][5]. As a result, gardeners are at increased risk of a number of health problems which can affect their working lives.…”

Section: Introductionmentioning

confidence: 99%

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Muscle fatigue related to human posture using a brush cutter for landscape gardening: a preliminary study

Yang¹,

Li²,

Li³

et al. 2022

Med Pr

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Background: Brush cutters are widely used in Chinese landscape gardening and agricultural laboring which leads the operators being exposed to many risks. Low back pain (LBP) is particularly common and can lead to substantial personal, community and financial burdens. The aim of the presented study was to measure the activity and function of each torso muscle of the operator when using the bush cutter, so as to evaluate the muscle injury of the operator during using several common brush cutters for different landscape tasks. Material and Methods: The human postures of 6 workers using 2 types of brush cutters in the 3 working conditions were recorded and measured by using a surface electromyography (sEMG) system and a camera. The test results were compared by t-test and sign test. The effect of human posture on the sEMG signal of trunk muscles in different working condition were analyzed by ANOVA. Results: In the 3 working conditions, except for the left trapezius muscle, the muscle load of operating the backpack brush cutter is higher than that of operating side-mounted brush cutter. When operating the side-mounted backpack brush cutter, the force on both sides of the trapezius muscle is uneven, the load of the left trapezius muscle is >25%, and the maximum value is >30%. Conclusions:The results highlighted significant differences in the effects of different working postures on the muscle activities of workers' trunk. Safe operation standards should therefore be taken to protect the exposed workers and to improve the industrial design of irrigation cutters to prevent the occurrence of occupational diseases. Med Pr. 2022;73(3):201-7

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“…The intrinsic characteristics of these machines for professional use (many of them are petrol engine and their mass usually never exceed 12 kg) may cause physical risks (noise and vibration) to the operators. Many studies concerned the hand-arm vibration (HAV) and the noise risks caused by chainsaws [6,7,8,9,10,11] and brush cutters [12,13,14,15,16,17,18]. Some authors focused their studies on noise and HAV caused by hedge cutters and blowers [7,19,20], while others were interested in the physical risks produced by mist blowers [21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

Vibration and Noise Transmitted by Agricultural Backpack Powered Machines Critically Examined Using the Current Standards

Calvo¹,

Preti

Caria³

et al. 2019

IJERPH

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European Directives 2002/44/EC and 2003/10/EC establish the exposure limit values for preventing operators’ risks to vibration and noise transmitted by machines. Few studies studied noise and vibration of agricultural backpack powered machines (as mist blowers and blowers), but nobody critically studied them. This work analyzed the field back vibration, hand-arm vibration (HAV), and noise transmitted to ten operators by eight blowers and mist blowers. Unweighted and weighted vibration were analyzed, using the standards ISO 2631-1 (back), and ISO 5349-1 and ISO/TR 18570 (hand-arm system). The noise was evaluated by recording the acoustic pressure level at the operators’ ears using the ISO 9612. With the ISO 2631-1, the vibration to the operators’ back was low (0.38 ms−2), but the unweighted vibration measured along y and z-axes (not used by the ISO 2631-1) were high (>11 ms−2). HAV were also low when using the ISO 5349-1 (the highest value was 2.51 ms−2 in mist blowers), but high with the ISO/TR 18570 for the onset of vibration white finger (1446 ms−1.5 in blowers). Noise levels were always high: more than 100 dB(A), excluding the blower with the exhaust inside the blower hose. This last machine had noise levels lower than 86 dB(A), but its specific feature could increase environmental pollution.

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Occupational risks related to vibrations using a brush cutter for green area management

Cited by 18 publications

References 12 publications

Occupational Exposure to Localized Vibrations Using Portable Mechanical Brush Cutter in Coffee Crop

Occupational Exposure to Localized Vibrations Using Portable Mechanical Brush Cutter in Coffee Crop

Muscle fatigue related to human posture using a brush cutter for landscape gardening: a preliminary study

Vibration and Noise Transmitted by Agricultural Backpack Powered Machines Critically Examined Using the Current Standards

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