中文摘要：

雷达液位仪是一种非接触式的高精度液位测量仪表。针对现有雷达液位仪不具有现场总线通信方式的现状，设计了基于CAN总线的雷达液位仪通信模块，给出了硬、软件的设计方案，并指出了需要注意的问题，为组建基于CAN总线的液位测量系统打下了良好的基础。实验表明，该通信模块具有结构简单、工作稳定可靠、通信速率高等特点。

英文摘要：

Radar level gauge is a contactless high - precision level gauge. The fieldbus communication mode has not yet been applied to the existing radar level gauges. A kind of communication module for radar level gauge is designed based on CAN bus. The design schemes of hardware and software are presented and several key problemes in design are pointed out. The work accomplished in the paper is advantageous to the realization of level measurement system based on CAN bus. Experiments indicate that the communication module has some merits such as simplicity, reliability and high communication rate.