基于表面肌电的草原公路驾驶员颈部肌肉疲劳模型研究

发布时间：2018-01-20 01:02

本文关键词： 颈部肌电草原公路肌肉疲劳模型中值频率　出处：《内蒙古农业大学》2017年硕士论文　论文类型：学位论文

【摘要】：据调查数据显示,截止2016年底,内蒙古自治区公路总里程已达到19万公里,并且其中大部分已建成公路和规划的待建公路都处于草原地区。草原地区人口密度低,地形地貌变化较小,草原公路途径村镇少、长直线多、平曲线半径大、交通量小,与其他公路相比具有明显的差异。驾驶员在草原公路行车时所受到的外界刺激少,操作转换频率低,使驾驶员处于"安静状态"中,容易导致驾驶疲劳,威胁到行车安全。本文针对具有明显地域特色的草原公路特征,从神经肌肉和人体的生物特性角度出发,结合典型草原公路实驾试验,采用能够很好地表征驾驶员肌肉疲劳的生理指标,对驾驶员行车时全程局部肌肉的表面肌电信号进行数据采集和分析,深入的分析了驾驶员颈部肌肉疲劳特点及影响因素,并在此基础上,建立在不同影响因素作用下驾驶员在草原公路行驶时颈部肌肉疲劳流变模型。对草原公路驾驶员颈部表面肌电信号频域指标及肌肉疲劳模型的变化规律进行研究,得出以下结论:(1)不同驾驶时间段对驾驶员颈部肌肉MF产生了不同程度的影响,其中在35～70min变化程度最大,建议驾驶员在70min左右的时候进行休息。(2)驾驶时间是影响颈部肌肉疲劳的一个重要因素,驾驶时间的增长使驾驶员颈部肌肉抗疲劳能力下降,会逐渐加深颈部肌肉疲劳。(3)性别对驾驶员的MF指标均值有显著影响,经过150min的驾驶规律分析,驾驶时间对女性驾驶员的影响较大,女性比男性更易发生疲劳。(4)在150min的驾驶时间内,驾驶时间对女性驾驶员的影响较大,驾驶经验对驾驶员的MF指标均值无显著影响,驾驶时间对非熟练驾驶员的影响较大。(5)针对性别和驾驶经验分别建立了草原公路驾驶员颈部肌肉疲劳流变模型,对于驾驶时间在150min范围内的,建议选择驾驶经验更丰富的男性的驾驶员。
[Abstract]:According to the survey data, as of end of 2016, the total road mileage of Inner Mongolia Autonomous region has reached 190,000 kilometers. And most of the completed highways and planned highways are located in the grasslands. Grassland areas have low population density, small changes in topography and geomorphology, less roads and towns, long straight lines, large radius of horizontal curve. The traffic volume is small, and there is obvious difference compared with other highways. The driver is less stimulated by the outside and the frequency of operation conversion is low when driving on the grassland highway, which makes the driver in the "quiet state". It is easy to cause driving fatigue and threaten the safety of driving. In this paper, according to the characteristics of grassland highway with obvious regional characteristics, from the point of view of neuromuscular and human biological characteristics, combined with the typical prairie highway driving test. The physiologic index which can well characterize the fatigue of driver's muscle is used to collect and analyze the data of EMG signal of local muscle in the whole course of driving. The characteristics and influencing factors of the driver's neck muscle fatigue were analyzed deeply, and on the basis of that, the author analyzed the fatigue characteristics of the driver's neck muscles. A rheological model of neck muscle fatigue was established under the action of different influencing factors. The frequency domain index of EMG signal on the neck surface and the variation rule of muscle fatigue model were studied. . The following conclusion is drawn: (1) different driving periods have different effects on the MF of the driver's neck muscle, and the biggest change is at 3570 min. It is suggested that driver rest at about 70 min.) driving time is an important factor affecting neck muscle fatigue, and the increase of driving time decreases the ability of anti-fatigue of the driver's neck muscle. After 150 minutes of driving analysis, the influence of driving time on female drivers was greater. Women were more prone to fatigue than men.) within 150 minutes of driving time, driving time had a greater impact on female drivers, but driving experience had no significant effect on the average MF index of drivers. The influence of driving time on unskilled drivers was greater. (5) aiming at gender and driving experience, the fatigue rheological model of neck muscles of steppe drivers was established, and the driving time was in the range of 150 minutes. It is recommended to choose a more experienced male driver.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.25

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