| 分段式液位测量仪多路数据传输方法 |
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| 引用本文： | 陈新,刘文海.分段式液位测量仪多路数据传输方法[J].黑龙江科技学院学报,2009,19(1):54-56. |
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| 作者姓名： | 陈新 刘文海 |
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| 作者单位： | 1. 哈尔滨理工大学,机械动力工程学院,哈尔滨,150080
2. 黑龙江科技学院,机械工程学院,哈尔滨,150027 |
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| 摘 要： | 针对多层液位测量仪连线复杂、信号传输不稳定等问题，根据油田实际情况，开发了分段式液位测量仪。该测量仪包括测量变送和数据传输转换两部分，采用RS-485接口芯片SN65LBC184实现了两个单片机之间的远程串口通信，选用AD421芯片设计专用的D/A转换电路，将数字信号转换为相应的4-20 mA工业电流。现场应用结果表明：该测量仪生产成本低、抗干扰能力强，可以满足油罐各类液位的测量和数据传送的要求。
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| 关 键 词： | 液位测量 数据传送 RS-485通信 4~20mA电流 |
Multi-channel data transfer method for divided-into-segment liquid level measurement device |
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| CHEN Xin,LIU Wenhai.Multi-channel data transfer method for divided-into-segment liquid level measurement device[J].Journal of Heilongjiang Institute of Science and Technology,2009,19(1):54-56. |
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| Authors: | CHEN Xin LIU Wenhai |
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| Institution: | CHEN Xin , LIU Wenhai (1. College of Mechanical ＆ Power Engineering, Harbin University of Science and Technology, Harbin 150080, China; 2. College of Mechanical Engineering, Heilongjiang Institute of Science and Technology, Harbin 150027, China) |
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| Abstract: | The attempt to overcome redundant connecting lines and unstable signal transmission of multilayer liquid level measurement instrument results in development of a divided-into-segment liquid level measurement device according to the real status of oil field. This device includes two parts： signal measuring and data transmission conversion. RS-485 interface chip SN65LBC184 is used for remote serial communication between two processors and special D/A conversion chip AD421 is used for changing digital signal into 4 - 20 mA current. Application results show that the device with a lower cost, higher anti-interference capacity is up to the requirements of almost all kinds of liquid level measurement in oil tank and data transfer. |
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| Keywords: | liquid level measurement data transfer RS-485 communication 4 - 20 mA current |
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