Influence of Cutting Attachment on Noise Level Emitted by Brush Cutter during Tending of Young Forests

Naskrent, Bartłomiej; Grzywiński, Witold; Łukowski, Adrian; Polowy, Krzysztof

doi:10.5552/crojfe.2020.657

Cited by 8 publications

(7 citation statements)

References 9 publications

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“…After analyzing the noise spectrum of the high-speed rotation of the scribing knife with different groove angles at varying rotating speeds, the noise was determined to reach the minimum value when the groove angle was approximately 91°, 95°, and 105°. Naskrent [ 95 ] studied the effect of a number of teeth in the blade of a brush cutter on the noise level. The study found that the noise level decreases as the number of teeth increases.…”

Section: Noise Signal Acquisition and Numerical Analysis And Noise Co...mentioning

confidence: 99%

Research Progress of Noise in High-Speed Cutting Machining

Wei

Shang

Peng

et al. 2022

Sensors

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High-speed cutting technology has become a development trend in the material processing industry. However, high-intensity noise generated during high-speed cutting exerts a potential effect on the processing efficiency, processing accuracy, and product quality of the workpiece; it may even cause hidden safety hazards. To conduct an in-depth study of noise in high-speed cutting machining, this work reviews noise sources, noise collection and numerical recognition, noise control, and condition monitoring based on acoustic signals. First, this article introduces noise sources, noise signal acquisition equipment, and analysis software. It is pointed out that how to accurately classify and recognize the target signal in the complex high-speed machining environment is one of the focuses of scholars’ research. Then, it points out that a computer achieves high accuracy and practicability in signal analysis, processing, and result display. Second, in the aspect of noise signal processing, the characteristics of noise signals are analyzed. It is pointed out that accurately analyzing the characteristics of different noise source signals and adopting appropriate methods for identification and processing are the necessary conditions for effectively controlling and reducing the noise in the process of high-speed cutting. The advantages and applicable fields of artificial intelligence algorithms in processing mixed noise source signals with different frequency characteristics are compared, providing ideas for studying the mechanism of noise generation and the identification of noise sources. Third, in terms of noise control, a detailed overview is provided from the aspects of the treatment of the noise source that contributes the most to the overall noise, the improvement of the tool structure, the optimization of cutting parameters, and the analysis of contact factors between the tool and the workpiece. It provides an effective way for noise control in the process of high-speed cutting. In addition, the application of acoustic signals to condition monitoring is also thoroughly analyzed. The practical application value of condition monitoring based on acoustic signals in high-speed machining is highlighted. Finally, this paper summarizes the positive significance of noise research in high-speed machining and identifies key problems and possible research methods that require further study in the future.

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Section: Noise Signal Acquisition and Numerical Analysis And Noise Co...mentioning

confidence: 99%

Research Progress of Noise in High-Speed Cutting Machining

Wei

Shang

Peng

et al. 2022

Sensors

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“…Naskrent et al [24] developed "a brush cutter and it was used for tending young forests. When cutting unwanted vegetation, the operator is exposed to various harmful factors, such as: a forced body position, noise, vibrations and exhaust emissions.…”

Section: Electric Oprated Bush Cuttermentioning

confidence: 99%

Different Bush Cutting Device: A Review

Chavda

Jhala²,

Gaadhe³

2022

JEAI

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In a Saurashtra region, farmers are facing a major problem with the trimming of boundary bushes or cutting of the fence of agriculture. In addition to this, unwanted bush also obstructs farm operations, roads, and electricity poles. Currently, bush-cutting is done through manual trimming by agricultural workers, but it is a time-consuming and expensive operation. In addition, using an axe or saw may lead to injury. To overcome this problem, it requires good tools or machines for safe and easy operation. Many mechanical devices are available to perform boundary bush trimming or agricultural fence cutting, but conventional mechanical power has several drawbacks, including non-continuous operation, limited speeds due to the use of mechanical gearboxes, high power loss in transmission, and increased maintenance. As time has changed, an improvement in traditional tools and devices is required. Hydraulic power is a good alternative to mechanical power, and it reduces the risks of human injury as compared to mechanical power. Also, the power transmission is more economical as compared to the mechanical. To maintain the preceding point, a hydraulic power transmission system was chosen over a mechanical one. In this study, an existing method was compared in terms of time and cost with a developed machine.

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“…Forwarder trailer units can be combined with agricultural tractors [6]. The advantage of such a combination is that the tractor can also be used for other purposes, e.g., at a time when the amount of harvested wood decreases, so the cost of purchasing the trailer will thus be recouped more quickly [7]. A forwarder and a tractor with a timber trailer normally skid wood harvested by a harvester, but also wood harvested by a chainsaw.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Heart Rate of Operators of Forwarding Machines during Work Activities

Sláma,

Mergl,

Pavlíková

2023

Forests

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The aim of this work was to determine the dependence of the heart rate of operators of forwarding machines on the activities performed during the working day within the framework of timber forwarding and to compare individual activities in terms of the level of physical workload. For this purpose, the work shift of operators carrying out timber forwarding was divided into individual activities: driving, maintenance, forwarding, and break. During these work activities, the heart rate of each operator was taken for subsequent evaluation. A portable device, a Garmin smartwatch, was used to measure their heart rate. The results show that the highest pulse rates of the operators occurred during the maintenance of the entrusted machine, while the highest pulse fluctuations were recorded during forwarding. During this activity, the highest heart rate of the entire measurement process was recorded (132.0000 bpm), but also the lowest (42.0000 bpm). Furthermore, it was proven that both the operator and the activity he performs affect the pulse rate. The activities themselves did not differ from each other in only one of the six cases of comparison, specifically, between driving and forwarding.

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Influence of Cutting Attachment on Noise Level Emitted by Brush Cutter during Tending of Young Forests

Cited by 8 publications

References 9 publications

Research Progress of Noise in High-Speed Cutting Machining

Research Progress of Noise in High-Speed Cutting Machining

Different Bush Cutting Device: A Review

Analysis of the Heart Rate of Operators of Forwarding Machines during Work Activities

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