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汽车行驶记录仪的现状与发展趋势 总被引:4,自引:0,他引:4
介绍了汽车行驶记录仪的功能和作用.研究了汽车行驶记录仪在国内外的现状及发展趋势,分析了我国推广应用汽车行驶记录仪的紧迫性和市场前景。 相似文献
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汽车行驶记录仪实时记录车辆运行和驾驶人驾驶活动的有关信息,为保障车辆行驶安全,提高营运管理水平提供了详尽数据而得到广泛推广,因此2004年起我国出台了卡、客车及运输危险品车辆强制安装汽车用行驶记录仪,由此记录仪也成为客车的标准配置。近期本刊多次收到读者来信,问讯客车记录仪的日常保养、故障诊断及简单维修方法。为此本版编辑致电宇通维修部门,就汽车行驶记录仪维修保养问题请教了宇通维修专家。 相似文献
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由公安部牵头,交通部等有关单位参加起草的GB/T19056-2003<汽车行驶记录仪>于2003年9月1日实施.这一国家标准的贯彻实施,标志着我国道路交通安全管理向着现代化、科学化迈出了实质性的一大步,同时为汽车行驶记录仪加了一把质量锁,使汽车行驶记录仪的市场得到进一步规范. 相似文献
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利用MSP430单片机,设计了一种简易的汽车蓄电池电压监视器。利用MSP430提供的内部ADC,对蓄电池工作状态,特别是起动瞬间的电压信号进行采集,绘制瞬时电压波动曲线,并以此曲线作为参考,分析蓄电池工作状态。实测结果表明,通过本文提出的方法,可以实现蓄电池失效的预警。 相似文献
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针对传统的中频电源设计中存在的一些不足,设计了由DSP和MSP430单片机的双处理器构成的中频电源系统,详细介绍了电源的系统结构和软硬件设计方案。系统利用DSP2812检测电源信号的电压、电流以及交流电频率,通过瞬时值反馈构成PID闭环,最终输出SPWM波,实现电压、电流双闭环控制。利用MSP430实现LCD显示电压、电流、频率等的当前值,当出现过电流、欠电压的异常现象时,能够自动保护、报警。 相似文献
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介绍凌志LS430汽车发动机止动系统的故障自诊断法、故障码诊断法、故障征兆诊断法以及电源电路和ECU端子电压检查方法。 相似文献
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首先对常规事故多发点鉴别方法进行了分析和评述,并通过实例揭示了多发点的鉴别本质。在此基础上,建立了基于三层BP神经网络的城市干道路段事故多发点鉴别模型。该模型考虑了交通事故7个方面的影响因素,并能将常规鉴别方法不易识别出的多发点鉴别出来。其次,应用哈尔滨市市区430个干道路段上1999年至2004年发生的13764起交通事故数据及关联因素数据,对神经网络的权值和偏置值进行了标定,并应用该模型进行了事故多发路段鉴别。最后,分别应用了事故次数概率分布法、矩阵法和质量控制法对430个路段进行了多发点鉴别,并对鉴别结果进行了对比分析。 相似文献
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Hyeokbin Kwon 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2018,56(8):1250-1268
The resistance force as well as the aerodynamic drag of Korean high-speed trains including two commercial trains, the KTX and the KTX-Sancheon (KTX-II) and two experimental trains, the HSR-350X and the HEMU-430X have been studied comprehensively. To deduce the aerodynamic drag of the trains, the coefficients of the Davis equation, which is a universal formulation to represent the resistance to motion of the train, have been calculated using the coasting test method and analysed in comparison with those by empirical prediction methods. In case of HEMU-430X train, the equations of resistance to motion have been calculated by an alternative regression method that is established in this study. The results show that the suggested method can successively yield the resistance to motion equation from the coasting test measurements with varying air density by separating the aerodynamic drag from the total resistance of train. It also prevents from improper coefficients which are occasionally taken by normal regression method in irregular coasting condition. After yielding the aerodynamic drag of the trains from the resistance to motion equations, characteristics of the aerodynamic drag have been analysed and compared between the trains. 相似文献
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介绍了2001款凌志LS430型轿车电动倾斜与伸缩转向柱的组成和功能。该转向柱系统具有故障自诊断功能。介绍了故障码B2602钥匙开锁警告开关电路故障、故障码B2610倾斜位置传感器或电动机电路故障等的诊断。另外,介绍了执行器电源电路和ECU电源电路、倾斜电动机和伸缩电动机电路等的俭修 相似文献
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张家界大峡谷玻璃桥为主跨430 m的空间索面人行悬索桥,集旅游、景观、娱乐、休闲于一体。考虑张家界“峰林”地貌,桥塔采用圆环形钢筋混凝土独柱结构,塔柱间不设横梁。西北侧、西南侧、东北侧、东南侧塔柱高度分别为40.65,40.65,37.15,40.15 m。东、西侧两塔柱间的横向中心距分别为50 m和45 m,每根塔柱均采用4根?1.2 m的人工挖孔灌注桩基础。桥塔总体静力、稳定性和细部结构分析结果表明:结构受力合理,安全可靠。 相似文献
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悬索桥扁平钢箱梁顶推施工受力分析 总被引:1,自引:0,他引:1
某3跨地锚式悬索桥加劲梁为扁平钢箱梁,钢箱梁跨径组成为(40+430+40)m,采用多点临时墩顶推施工。为了确保钢箱梁在顶推施工过程中结构安全,建立有限元计算模型对顶推施工过程进行整体和局部受力分析。计算结果表明临时墩支点高程设置形式、滑道支承形式和横向偏位等对钢箱梁受力影响较大。根据计算结果提出了钢箱梁顶推施工过程线形控制、临时墩反力控制及局部应力施工控制等参数以及相应控制措施。实际顶推施工结果表明钢箱梁受力及线形控制较好。 相似文献
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The objective of this study was to study whiplash injury outcome in front-seat occupants in rear-end impacts using double paired comparison technique. The combination of gender, seated position, and outcome was analyzed. Folksam, a Swedish insurance company, has a database of whiplash injuries. A questionnaire was used to collect study data. The response rate was 81%. The inclusion criteria included medical impairment one year after the impact, as judged by medical specialists. The study included rear-end impacts between 1990 and 1999 that resulted in at least one permanent neck injury impairment; in total, 430 impacts with 860 occupants and 444 impairments. Of those suffering impairment, 302 were female and 142 male; 235 were seated in the driver's seat and 209 in the front passenger seat. Relative risk estimates for impairing whiplash injury, by gender and seated position:
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- Driver male (DM)/passenger female (PF) relative risk = 0.5 n = 218 相似文献