管内智能封堵器通信与控制系统的设计

Design of communication and control system for oil-gas pipeline intelligent plugs

目前国内用于输送石油天然气的管道铺设长度逐年增加,对于油气输送管道的维护维修需求愈发增加。管内智能封堵技术相比传统的封堵技术,在工程量,成本上拥有明显的优势。为了实现管道内工作环境的无线通信控制要求,在管内智能封堵器中,通信与控制系统是核心技术。本系统采用基于低频电磁波的双向通信方法,地面控制单位发射带有码元信息的低频电磁波,管内作业单元接收到此电磁波,通过滤波、放大、解调得到相应的码元,从而根据码元判断所需要进行的各项操作。并在作业的不同阶段发送代表工作状态的电磁波到地面控制单元。通过建立稳定的双向通信通道,完成地面控制器与管内作业单元的同步工作,完成对管内智能封堵器的控制,保证封堵作业顺利进行。

At present, the length of pipeline laying for the oil and natural gas is increasing year by year, and the demand of maintenance and repair for oil and gas transmission pipeline is increasing. Compared with the traditional sealing technology, the intelligent sealing technology in the pipe has obvious advantages in the engineering quantity and cost. In order to achieve the requirements of wireless communication control according to the work environment of intelligent pipe plug, the communication and control system is the core technology. The system uses a two-way communication method based on low frequency electromagnetic wave,the control unit on the ground emission of low frequency electromagnetic wave with symbol information, operation unit in the tube receives the electromagnetic wave, obtain the corresponding symbols by amplifying, filtering and demodulation and then obtain the corresponding action. The operation unit emission different electromagnetic wave when it is in different working condition to the ground control unit. By establishing a stable bidirectional communication channel, we can make sure the controlling unit on the ground and the operation unit in the tube can work in tandem, and control the intelligent plus, to ensure the plugging operation.