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基于PSoC及Cyfi无线通信技术,设计了一种智能车窗控制系统方案,具有无线控制车窗升降、车窗防夹手等功能。实验结果表明,该方案具有设计简单灵活、操作方便、功耗低、抗干扰等特点,可作为一种无线智能控制方案应用于汽车电子领域。 相似文献
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嵌入式汽车车窗控制器设计 总被引:1,自引:0,他引:1
为了降低汽车车窗控制器成本,提高可靠性,本设计运用低成本Microchip单片机作为核心设计了汽车车窗控制器,实现了一键升降、防夹、延时等功能。本设计产品已小批量生产,用于海南马自达轿车。 相似文献
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针对小区车位管理混乱,管理水平低下等问题,设计了一种太阳能供电的无线传感网车位管理系统。系统主要由终端节点、路由节点、中心协调器、控制终端以及车牌识别系统构成,网络内的终端节点、路由节点均由太阳能光伏电池板供电。车牌识别系统识别进出车辆牌号并送入控制终端查找确认该车辆对应的车位锁(终端节点),并由中心协调器通过无线传感网络控制该车位锁的升降,实现了小区车位网络化、智能化管理,提高了管理效率和水平,拓展了无线传感网络的应用范围。 相似文献
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窦俞雯 《电子制作.电脑维护与应用》2015,(9)
首先通过对汽车电子发展的介绍提出对电动车窗控制器的应用要求,接着给出车窗升降传统系统的模型并介绍了升降机构及摇窗电机的结构特性。最后给出电流霍尔脉冲检测法、电流纹波检测法、纯霍尔脉冲检测法及混合算法四种防夹算法的工作原理,并对比了各自的优缺点。 相似文献
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一种类似CAN的用于车载、单线、串行通信网络——LIN网络常作为车载CAN网络的子网络存在,主要应用于车身电器的网络化控制;文中针对车窗模块的控制功能特点,参考国际诊断标准ISO-15765,设计了LIN网络应用层诊断协议,并设计了上位机LIN网络数据监控测试程序界面,对车窗状态信息进行实时采集和分析,从而实现了车窗防夹控制及故障诊断功能;最后对车窗的控制行为进行了测试,验证其协议和方案的可行性. 相似文献
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LabVIEW控制步进电机自动升降速 总被引:5,自引:0,他引:5
步进电机在开环控制系统中作为控制用电机和驱动用电机得到广泛使用,为防止失步和过冲,使用步进电机高速运行时必须有升降速过程。本文在分析比较几种常用的升降速控制曲线基础上,利用LabVIEW通过PCI-1780卡实现了步进电机自动升降速的软件控制。 相似文献
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针对凸轮磨削加工过程中存在局部升程误差严重超差的问题,提出了加权支持向量机的凸轮升程误差补偿方法。首先根据圆率的符号判断凸轮升程误差值是否连续,然后建立了不连续点与相邻点之间夹角与加权值的关系。通过加权支持向量机对凸轮升程误差值进行拟合。然后将原始凸轮升程值减去经拟合后的凸轮升程误差值,获得新的凸轮升程值。再根据圆率自动调整加权值的系数,使凸轮升程值光滑点数最大,即获得最优的凸轮升程值。对上述算法进行仿真和编程,经YTM8336-16数控凸轮轴磨床进行磨削验证。实验表明,凸轮升程误差由原来的±0.059 mm降至±0.011 mm,表面粗糙度由Ra0.32μm降至Ra0.25μm,获得良好的效果。 相似文献
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Heacock H Paris-Seeley N Tokuno C Frederking S Keane B Mattie J Kanigan R Watzke J 《Applied ergonomics》2004,35(4):393-399
Home support workers (HSWs) work in clients' homes assisting with rehabilitation and activities of daily living. Like all health-care professionals, HSWs are at an increased risk for developing back injuries. Lift devices have been shown to reduce injuries to the worker. Presently, there are few lifting devices for home use that cost under $4000 CDN. Our study involved designing a safe and affordable lift device (retail cost under $2000 CDN) to be used by HSWs in the home and evaluating it in a typical bathroom. Thirty-eight HSWs and three seniors evaluated the BCIT lift, a commercially available lift (BHM Medical Inc.) and the manual method of transfer and lift. Results indicated that the BCIT lift was an improvement over the manual method of transferring, and approximated the more expensive, automatic lift in terms of perceived exertion, ease of use and safety. Feedback provided to the researchers has been incorporated into a new, ergonomically sound and marketable lift device. 相似文献
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In an effort to discover the causes for disagreement between previous two-dimensional (2-D) computations and nominally 2-D experiment for flow over the three-element McDonnell Douglas 30P-30N airfoil configuration at high lift, a combined experimental/CFD investigation is described. The experiment explores several different side-wall boundary layer control venting patterns, documents venting mass flow rates, and looks at corner surface flow patterns. The experimental angle of attack at maximum lift is found to be sensitive to the side-wall venting pattern: a particular pattern increases the angle of attack at maximum lift by at least 2°. A significant amount of spanwise pressure variation is present at angles of attack near maximum lift. A CFD study using three-dimensional (3-D) structured-grid computations, which includes the modeling of side-wall venting, is employed to investigate 3-D effects on the flow. Side-wall suction strength is found to affect the angle at which maximum lift is predicted. Maximum lift in the CFD is shown to be limited by the growth of an off-body corner flow vortex and consequent increase in spanwise pressure variation and decrease in circulation. The 3-D computations with and without wall venting predict similar trends to experiment at low angles of attack, but either stall too early or else overpredict lift levels near maximum lift by as much as 5%. Unstructured-grid computations demonstrate that mounting brackets lower the lift levels near maximum lift conditions. 相似文献
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The lift of an association rule is frequently used, both in itself and as a component in formulae, to gauge the interestingness of a rule. The range of values that lift may take is used to standardise lift so that it is more effective as a measure of interestingness. This standardisation is extended to account for minimum support and confidence thresholds. A method of visualising standardised lift, through the relationship between lift and its upper and lower bounds, is proposed. The application of standardised lift as a measure of interestingness is demonstrated on college application data and social questionnaire data. In the latter case, negations are introduced into the mining paradigm and an argument for this inclusion is put forward. This argument includes a quantification of the number of extra rules that arise when negations are considered. 相似文献
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乘波体组合高压捕获翼构型的性能分析 总被引:1,自引:0,他引:1
针对高速飞行器大容积、高升力、低阻力和高升阻比的设计需求,提出高压捕获翼(High pressure zone Capture Wing,HCW)的概念.在高速巡航条件下,合理配置HCW可以充分利用来流压缩产生的高压气体,从而提高飞行器升力;HCW采用与来流平行的薄板装置,其附加阻力较小,可以大幅提高升阻比.采用CFD分析工具,比较不同容积的乘波体构型与HCW组合前后的气动性能.结果表明,在不同容积构型下升阻比均有明显提高,最小提升量可达10%.此外,容积越大,升力和升阻比增加效果越明显. 相似文献
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本文主要介绍运用PLC控制技术设计开发的八层观光电梯系统,完成了电梯的运行、电梯门的开关闭合,轿箱风外呼叫应答等功能,并结合变频器,完成了电梯的变频调整。另外,本文利用组态王软件开发了电梯远程监视系统,通过电梯远程监测装置实时监控电梯运行状态,保证了正常动作,大大提高了运行的安全和可靠性。 相似文献