| 基于CAN总线的智能超声液位变送器 |
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| 引用本文： | 焦冰,叶松,王晓蕾.基于CAN总线的智能超声液位变送器[J].现代电子技术,2010,33(11):131-134. |
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| 作者姓名： | 焦冰 叶松 王晓蕾 |
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| 作者单位： | 解放军理工大学,气象学院,江苏,南京,211101 |
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| 摘 要： | 介绍了基于CAN总线的智能超声液位变送器的设计。选用ARM7TDMI-S内核的LPC2119作运算控制器,利用LPC2119芯片内部的CAN总线控制器设计CAN总线通信接口。超声液位变送器采用收发一体式电路设计,由数字温度传感器DS18B20进行温度补偿,利用ARM芯片强大的处理能力,对回波信号进行数字滤波处理,从而准确检测出超声波的传播时间。
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| 关 键 词： | CAN总线 超声波 液位 数字滤波 |
Smart Ultrasonic Liquid Level Transmitter Based on CAN Bus |
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| JIAO Bing,YE Song,WANG Xiao-lei.Smart Ultrasonic Liquid Level Transmitter Based on CAN Bus[J].Modern Electronic Technique,2010,33(11):131-134. |
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| Authors: | JIAO Bing YE Song WANG Xiao-lei |
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| Affiliation: | JIAO Bing,YE Song,WANG Xiao-lei(Institute of Meteorology,PLA University of Science , Technology,Nanjing 211101,China) |
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| Abstract: | The design of a smart ultrasonic liquid level transmitter based on CAN bus is introduced.The communication interface of CAN bus was designed by choosing LPC2119 chip with ARM7TDMI-S inner core as the arithmetic control unit,and by utilizing CAN bus controller inside LPC2119 chip.The design of the monolithic transmitting and receiving circuit is emploied for the transmitter.Digital temperature sensor DS18B20 is adopted as temperature compensation device.The echo signal is processed with the digital filtering... |
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| Keywords: | CAN bus ultrasonic liquid level digital filtering |
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