摘要
针对煤矿现场设备因节点多、距离长而需要对CAN总线信号进行中继放大的要求,以及常用的软件CAN总线中继器存在数据帧延时、丢帧、功耗大、速率无法自适应等问题,设计了一种矿用硬件CAN总线中继器。该中继器主要由D触发器、异或门和CAN收发器组成,其中D触发器用于控制电平信号传输,异或门用于产生D触发器翻转所需的脉冲信号,CAN收发器将数据接入CAN总线网络,从而实现CAN总线信号透明传输。仿真及试验结果表明,矿用硬件CAN总线中继器能准确传输CAN数据帧,有效提高总线电平,改善信号质量,提高通信距离。与软件CAN总线中继器相比,该中继器具有功耗低、延时小、不丢帧、速率自适应等优点,适用于煤炭工业领域对数据帧延时、功耗等要求较高的CAN总线网络。
In view of requirement of relay and amplification of CAN bus signal due to lots of nodes and long transmission distance of coal mine field equipments and problems of normal software CAN-bus repeater such as data frame time-delay,frame loss,large power consumption,non self-adaptive rate and so on.In order to solve above problems,a mine-used hardware CAN-bus repeater was designed.The repeater is mainly composed of D trigger,XOR gate and CAN transceiver.The D trigger is used to control level signal transmission,the XOR gate is used to generate pulse signals for D trigger flip-flop,and the CAN transceiver accesses data into CAN-bus network,so as to realize transparent transmission of CAN-bus signal.The simulation and experiment test results show that the mine-used hardware CAN-bus repeater can correctly transmit CAN data frame,effectively improve bus level and signal quality,and increase communication distance.Compared with software CAN-bus repeater,the mine-used hardware CAN-bus repeater has advantages such as low power consumption,little time-delay,no frame loss,rate selfadaption and so on,which is applicable for CAN-bus network with high requirements about data frame time-delay and power consumption in coal industry field.
作者
谢国军
袁凤培
丁俊峰
XIE Guojun;YUAN Fengpei;DING Junfeng(CCTEG Changzhou Research Institute,Changzhou 213015,China;Tiandi(Changzhou)Automation Co.,Ltd.,Changzhou 213015,China)
出处
《工矿自动化》
北大核心
2019年第11期37-41,共5页
Journal Of Mine Automation
基金
天地科技股份有限公司科技创新创业资金专项项目(2018-TD-QN012)
