نتایج جستجو برای: vibration measurement
تعداد نتایج: 488286 فیلتر نتایج به سال:
This paper presents a non-invasive, non-contact system for the measurement of the arterial dorsum manus vibration waveforms of Parkinson disease patients. The laser line method is applied to detect the dorsum manus vibration in rest and postural situations. The proposed measurement system mainly consists of a laser diode and a low cost complementary metal-oxide semiconductor (CMOS) image sensor...
The University of Salford has derived an exposure-response relationship for vibration in residential environments. Vibration measurements have been used for assessing the human exposure alongside a social study questionnaire based on face-to-face interviews for quantifying the human response. This paper deals with the exposure side of the study. In order to cover the wide range of exposures aff...
In recent trends, Sensors are devices which monitor a parameter of a system, hopefully without disturbing that parameter. Vibration measurement has become an important method in mechanical structural product’s research, design, produce, apply and maintenance. Vibration sensor is more and more important as key devices. Nowadays, with the development of computer technology, electronic technology ...
Background: Workers who use hand-held vibrating tools may experience finger blanching attacks due to episodic vasospasm in the digital vessels. In occupational medicine, the pathological consequences to the exposure to handtransmitted vibration are known as vibration induced white finger (VWF). In many cases, workers are recommended to use anti-vibration gloves and a standard procedure (ISO 108...
Transformer tank vibration has been used for the condition monitoring and fault diagnosis of power transformers, as well as for the evaluation of radiated sound power from such power transformers. In both applications, seeking a correlation between transformer tank vibration and the vibration of the transformer windings and core becomes a challenge for fault identification and noise control at ...
The shocks and impacts encountered on small high-speed craft exceed the limits set for safe working practice according to current standards. European legislation regarding the exposure to vibration will have far reaching effects on the operators of such craft with respect to the safety of their employees. This paper sets out to highlight the vibration dose values that can be expected during typ...
A field study was done to evaluate different seat designs in the aspect of minimizing vibration transmission and reducing the level of discomfort experienced by drivers subjected to transient vibration. Two seat designs (sliding or fixed in the horizontal direction) were compared in an experiment based on variation of sitting posture, speed, and type of obstacle. The comparison was done by asse...
transmission of blast waves is a complex phenomenon and the characteristics vary with blast design parameters and geo-technical properties of medium. frequency of vibration and triggering component for structural excitation generally quantifies safe vibration magnitude. at closer distance or higher elevations than the blast locations, vertical or transverse component will be the first arrival t...
Prolonged exposure to hand-arm vibration (HAV) due to use of hand-held power tools leads to an increased occurrence of symptoms of disorders in the vascular, neurological, and osteo-articular systems of the upper limbs called hand-arm vibration syndrome (HAVS). Biodynamic responses of the hand-arm system to vibration can be suggestive parameters that give us better assessment of exposure to HAV...
در رساله حاضر سطح نویز داخلی خودرو با توجه به ارتعاشات سازه ای، که از جمله آنالیزهای نویز- ارتعاش- ناهنجاری می باشد، مورد بررسی قرار گرفته است. تقاضای روزافزون برای محصولات نرم تر، آرام تر و ایمن تر لزوم انجام آنالیز های قبل از تولید در صنعت خودرو، از جمله nvh را قبل از عرضه به بازار آشکار می سازد. کاهش مصرف سوخت از طریق کاهش وزن قطعات مصرفی در خودروها بیش از پیش آنها را در معرض ارتعاشات ناخواس...
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