【作者】 焦冰； 唐慧强；

【Author】 Jiao Bing Tang Huiqiang (Department of Information & control,Nanjing University of Information Science & Technology Nanjing 210044 China)

【机构】 南京信息工程大学信息与控制学院；

【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做运算控制器,利用LPC2119芯片内部的CAN总线控制器设计了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,提高了液位测量的精度。更多还原

【Abstract】 A design of Smart Ultrasonic Liquid Level Transmitter Based on CANBus is introduced in this pape. LPC2119 ship with ARM7TDMI-S inner core is chosen as the processor,CANBus is used to be communication interface.Monolithic transmit and receive circuit is designed.Digital temperature sensor DS18B20 is adopted as temperature compensation device.A new method which using digital filtering to process echo signal is applied, the precision of liquid level measure is improved.更多还原