排序方式: 共有104条查询结果,搜索用时 15 毫秒
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Use of a datalogger connected to the CAN bus of an 8-wheeled forwarder’s hydrostatic transmission permits measurement of the gross power on the driveline and the rotational velocity of the drive axle. The ground velocity and trajectory of the forwarder is monitored by the GPS technique. These data allow the total resistance force and wheel slip to be determined under different terrain conditions. In this paper the total resistance force is segregated into rolling, slope and winding resistances. The measuring system was tested in practice on an even tarmac surface and a gently sloping hard earth road, the number of input variables in the first tests having been reduced. It was found that the measuring accuracy permitted detection of about a half percent variation in slope inclination in the test lane. Tests on a figure of 8 track showed that the winding resistance can also be detected. It was concluded that the measuring technique is accurate enough for terramechanical research and practicable under real forestry conditions. 相似文献
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Michael R. Attwood Mark L. Lewis Peter Quayle Simon P. Thompson 《Tetrahedron letters》2006,47(21):3607-3611
α-Alkoxystannanes undergo oxidation upon treatment with cerium ammonium nitrate generating oxonium ions, which can be trapped in an intramolecular fashion affording furo[2,3-b]pyrans. 相似文献
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Shengkai Ko 《Tetrahedron》2006,62(31):7293-7299
A facile and efficient one-pot synthesis of high yields of polyhydroquinoline derivatives at ambient temperature using Ceric Ammonium Nitrate (CAN) as catalyst via the Hantzsch reaction was reported. The process is simple and environmentally benign and the catalyst is commercially available and inexpensive. 相似文献
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Bromate exchange resin has been prepared by a simple elution technique and used for the oxidation of aromatic aldehydes to the carboxylic acids. Oxidation is carried out under biphasic condition. Work up is simple. Resin immobilized bromate ions have been used for the first time as an oxidizing agent in organic synthesis. 相似文献
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针对水下机器人(ROV)在深海高噪声干扰环境中工作的特点,设计了一套基于VxWorks实时操作系统的ROV整体通信系统,实现了水下核心控制器对水下分系统快速高效的信息采集和数据分配,水下系统和水面控制器稳定实时的数据交换;硬件方面设计了以CAN总线为基础的水下通信系统,通过FPGA实现了CAN总线和PC104总线之间的时序逻辑转换,软件方面设计了基于TCP/IP协议栈的水面操控台和ROV之间的网络通信方式和水下各系统之间的CAN总线通信方式,着重介绍了基于缓冲队列的网络通信编程;通信系统数据测试实验表明:CAN总线通信和网络通信均具有良好的实时性和可靠性,满足最初的设计需求,而且采用模块化设计,便于维护和移植。 相似文献
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由于光纤优良的抗电磁干扰能力、低损耗等特点,使光纤CAN网络在微波加热等复杂工业环境中得到越来越广泛的应用。在分析了CAN总线通信协议和光纤媒介拓扑结构的基础上,提出了一种基于LPC2292微控制器的光纤CAN环形网络的设计方案。采用光收发一体模块和2X2光分路器相结合的方式,设计了相应的接口电路和CAN控制器软件,并根据信号衰减和延时计算出网络可容纳的最大节点数。通过3个节点的光纤CAN环网实验,验证了该网络设计方案的有效性。 相似文献
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现有的USB-CAN接口模块存在不支持多应用同时访问、滤波算法简单、需要外接终端电阻等缺点或不足。提出了一种基于XMC4500微控制器的新型智能USB-CAN接口模块设计方法,并给出了详细的软硬件设计过程。接口模块具有支持多应用同时访问、提供复杂的软硬件智能滤波算法、能够通过软件设置终端电阻等诸多优点,可以用于各种基于PC的CAN总线通信数据分析与监测场合中。 相似文献