【作者】 徐猛；

【导师】 刘波峰；

【作者基本信息】 湖南大学 ， 测试计量技术与仪器， 2008， 硕士

【摘要】 随着时代的进步和科技的发展,汽车行业对变速箱的要求已越来越高。变速箱是汽车主要传动部件,它的质量直接影响到整车的质量,它的可靠性决定着汽车运行的可靠性。本论文设计的是一种基于Profibus现场总线的分布式数据采集和控制系统,实现对多个汽车变速箱加载实验台的液压、温度和流量等现场信号实时测量和传输控制及远程显示等功能。DP主站采用Comsoft公司的FNL设备及驱动,结合NI公司的LabVIEW8.2进行开发,同时通过OPC方式进行数据库相关操作。FNL设备带有D型9针接口,通过该接口将主站挂接至总线上。该主站实现整个网络检测和控制的功能,主站提供以太网接口,在特殊情况下,并可扩展至局域网组网监控。DP从站采用Siemen公司的profibus协议芯片SPC3,结合Atmel的89S52单片机构建。由SPC3完成对Profibus DP协议分析的功能,89S52作为处理器单元管理通信事务。从站接口符合RS-485标准,使用9针D型连接器连接到总线上。从站分为二类,测试从站完成压力、温度、流量、转速和转矩等参数的检测并转换为标准信号经SPC3送至主站。控制从站输出PWM控制信号,对直流无刷电机进行速度调节。无刷直流电机采用6MBP100RA120型IPM(智能功率模块)驱动,采用专门的无刷直流电机控制芯片LM621进行控制。从站提供扩展接口,可方便以后更多参数如噪声、振动等检测信号的测试和其他控制功能的扩展。系统的上位机设计采用LabVIEW8.2完成。具有权限登陆、测试、试验数据实时显示、数据报表、试验数据曲线显示和数据存储等功能。更多还原

【Abstract】 With the Progress of the epoch and the development of the technical, the automobile industry has been getting the higher demands of the gear-box.While the gear-box is the main part of the automobile’s driving motion. The gear-box’s quality will directly decide the automobile’s quality,So does its’robust.This Paper elaborates the data acquisition and control system based on the field bus- Profibus. The dispersive data as hydraulic pressure,temperature and flow rate etc are measured in real time, also with the data transmission, control and the Remote display.The development of the DP master station adopts the Comsoft FNL device and the driver, joint with the NI‘s LabVIEW 8.2,and using the OPC mode to operator the database.The FNL has a Type-D interface with 9 pin, the master station connect to the fieldbus through the interfiace. The master station detect the network and control the fieldbus system,the FNL has provide a Ethernet interface,with the extend of the LAN can PC monitor the system.The development of the DP slave station adopts the Siemens’s Profibus protocol chip SPC3 and joint with the Atmel’s MCU 89S52.SPC3 analysis the protocol of the profibus DP,while the 89S52 deal with the communication of the affairs as the processor unit.The interface in accordance with the standard RS485,using the Type-D interface connect to the fieldbus.Two classes of the DP slave station mainly complete the function of the data detect and the control process. As the detect slave station , constitute of the sensor which is used to acquire the pressure,temperature, flow rate and the torsion etc. these signal will be converted to the standard signal and be send to the MCU,then convey to the master staion through chip SPC3. As the control slave station, the MCU output the PWM signal which could adjust the speed of the BLDC(brushless DC motor ).The BLDC are driverd by the IPM(Intelligent Power Module) 6MBP100RA120,and controlled by the expert chip LM621 which is used for the right BLDC controller. The extend interfaces will be convenient to access more signal such as the noise and the vibration etc.The upper computer are constituted by the IPC and the software LabVIEW8.2 which has the function of the login, test, display and the database invoke.更多还原