智能混凝土搅拌站称重仪表  

An Intelligent Weighing Meter for Concrete Mixing Plant

作　　者：李拥军 姚高尚 熊腊森[2] 

机构地区：[1]三一重工智能工程研究本院,湖南省长沙市410100 [2]华中科技大学

出　　处：《工程机械》2008年第3期5-8,共4页Construction Machinery and Equipment

基　　金：长沙市科技计划资助重点项目(KZB064002)

摘　　要：自主开发的基于CAN现场总线的智能混凝土搅拌站称重仪表由显示控制模块和传感器数据采集模块组成,模块之间由CAN总线连接,为增强CAN总线节点的抗干扰能力,CAN总线控制器SJA1000并不是直接和CAN收发器A82C250相连,而是通过高速光耦6N137后与之相连,使总线上各CAN节点间电气隔离;同时,在电源部分采用了DC-DC模块B0505LS给光耦6N137右边模拟电路供电,采用不同的电源供电,光耦6N137两边电路完全隔离,提高了模块的稳定性。新型称重仪表的软件包括数据采集程序和显示控制程序两部分,分别安装在传感器数据采集模块和显示控制模块内。基于CAN现场总线的智能混凝土搅拌站称重仪表的准确度达到国家Ⅲ级标准,CAN通讯波特率可达250kB/s;该新型仪表已取得了国家相关技术专利和器量型具批量生产许可证书,目前已经批量应用于三一集团的混凝土搅拌站。Based on site CAN bus, the self-developed intelligent weighing meter of concrete mixing plant consists of control module for display and data collecting module of sensors. The connection between modules is by CAN bus. In order to enhance anti-interference ability of CAN bus nodes, the CAN bus controller, SJA1000, is not directly connected to the CAN transceiver, A82C250, but connected to it through a high speed optical coupler which makes every CAN node on bus electrically isolated. At the same time, in power system, DC-DC module, B0505LS, is adopted to power the right analog circuit in optical coupler 6N137. With different power supply, circuits on two sides of optical coupler 6N137 are isolated completely so that the module's stability is increased. The software of new type weighting meter includes data collecting program and display control program that are respectively installed in data collecting module of sensors and display control module. Accuracy of the site CAN bus based intelligent weighing meter of concrete mixing plant reaches national standard grade Ⅲ and baud rate of CAN communication is at 250 kbps. The weighing meter is now under national technical patent protection and with license of mass production for instruments and metering tools. Now the meter has been equipped on concrete mixing plant of SANY group in large volume.

关 键 词：CAN现场总线 混凝土搅拌站 称重仪表 

分 类 号：TH715.1[机械工程—测试计量技术及仪器]