基于STM8L的长输油气管道低频通信发射系统设计

Design of Low Frequency Communication Transmission System for Long Oil and Gas Pipeline Based on STM8L

为进一步提升长输油气管道内检测器与外部接收装置的通信距离,本研究详细阐述了低频通信机理,优化了LC串联谐振结构,并基于STM8L低功耗主控制器设计了交流低频脉冲(23Hz)功率驱动电路。实验结果表明,该发射系统可有效完成埋地管道内外通信,且伴随外部供电电压逐步增加,通信距离显著提高,但发射效率系数逐渐降低,需根据实际工况调整供电参数。同时,系统在空旷环境下20V供电时的最大通信距离为28.25m,工作电流仅42mA,从电池安装体积(与电池容量成正比)及使用时间角度考虑,完全满足现场工程应用需求。

In order to further enhance the communication distance between the internal detector and the external receiver in the long-distance oil and gas pipeline.In this study,the low-frequency communication mechanism was elaborated in detail,and the LC series resonance structure was optimized.Meanwhile,the AC low-frequency pulse(23Hz)power drive circuit based on the low-power main controller STM8L was designed.The experimental results show that this transmitting system can effectively communicate inside and outside the buried pipeline,and with the gradual increase of external power supply voltage,the communication distance is significantly improved,but the transmitting efficiency coefficient gradually decreases.Thus,it needs to adjust the power supply parameters according to the actual working conditions.At the same time,the system has achieved a maximum communication distance of 28.25m and an operating current of only 42mA when powered by 20V in an open environment.From the perspective of battery installation volume(proportional to battery capacity)and usage time,it fully meets the requirements of on-site engineering applications.