基于电力载波的水下数据传输技术的研究
发布时间：2019-05-18 04:32
【摘要】：水下生产系统作为海洋油气勘探的关键设备,其可靠稳定的工作是水下安全生产的前提和保障。水下控制系统能够实时采集海底采油生产过程参数并上传给水上控制站,实现对水下生产工作状况的实时监测。电力线载波通信是将数据信息调制到一定频率的高频载波并耦合至电力线上传输发送,因此,采用基于脐带缆的电力线通信传输技术能很好地适应深水生产系统的工作特点。不仅解决了长距离传输的问题,也降低了海底布线的复杂度,节约了生产成本。然而我国在水下电力载波通信技术的研究尚处在起步阶段,本文针对水下电力载波技术展开研究,取得以下收获:(1)介绍水下生产系统的拓扑结构,阐述了水下电力载波在水下传输各节点模块的功能,分析了供电电源EPU、脐带缆电力线和水下控制系统调制解调对水下电力载波数据传输的影响,总结出水下电力通信的特点。(2)在论述了扩频和正交频分复用(OFDM)通信技术的基础上,选择了扩频调相载波芯片Mi200e和主控单片机,设计出水下电力载波数据传输系统的硬件电路。采油树管汇上传感信号通过信号放大电路被主控制器采集后进行A/D转换处理,利用SPI串口通信实现主控制器与载波芯片之间数据传输。载波芯片将接收到的数据进行QPSK调制后,经过Mi200e内置功率信号放大电路和设计的窄带滤波耦合电路,实现了数据在脐带缆电力线中的发送与接收。(3)在分析了载波芯片Mi200e的通信协议的基础之上,详细阐述了水下电力载波通信发送与接收的流程。根据供电网络的传输特性,采用过零检测技术,实现在交流电半周期10ms内,连续发送三个数据包,保证数据传输的可靠性。(4)实验测试部分采用串口调试助手软件对系统进行调试,通过采集波形分析,对电路参数进行微调。负载特性变化对波形的幅值影响较大,但波形完整,达到了QPSK调相的目的。最后通过对水下数据传输系统的运行调试,证明该设计方案的可行性。整个系统实现了对采油树模型管汇上7路传感信号的采集,精度0.2级以上,并通过系统在整个水下测试平台长时间不间断运行,验证了系统的稳定性与可靠性。
[Abstract]:As the key equipment of offshore oil and gas exploration, the reliable and stable work of underwater production system is the premise and guarantee of underwater safety production. The underwater control system can collect the parameters of seafloor production process in real time and upload it to the water control station to realize the real-time monitoring of the working condition of underwater production. Power line carrier communication is to modulate the data information to a certain frequency of high frequency carrier and coupling it to the power line for transmission and transmission. Therefore, the power line communication transmission technology based on umbilical cord cable can adapt to the working characteristics of deep water production system. It not only solves the problem of long distance transmission, but also reduces the complexity of submarine wiring and saves the production cost. However, the research of underwater power carrier communication technology in our country is still in its infancy. In this paper, the research on underwater power carrier technology is carried out, and the following gains are obtained: (1) the topological structure of underwater production system is introduced. This paper expounds the function of each node module of underwater power carrier transmission, and analyzes the influence of EPU, umbilical cord cable power line and underwater control system modulation and demodulation on underwater power carrier data transmission. The characteristics of underwater power communication are summarized. (2) based on the discussion of spread spectrum and orthogonal frequency division multiplex (OFDM) communication technology, the spread spectrum phase modulation carrier chip Mi200e and the main control single chip microcomputer are selected. The hardware circuit of underwater power carrier data transmission system is designed. After the sensing signal on the oil tree tube is collected by the main controller through the signal amplification circuit, the A / D conversion is carried out, and the data transmission between the main controller and the carrier chip is realized by using SPI serial communication. The carrier chip modulates the received data by QPSK, and passes through the Mi200e built-in power signal amplification circuit and the designed narrow band filter coupling circuit. The transmission and reception of data in umbilical cable power line is realized. (3) based on the analysis of the communication protocol of carrier chip Mi200e, the transmission and reception flow of underwater power carrier communication is described in detail. According to the transmission characteristics of the power supply network, zero-crossing detection technology is used to send three data packets in AC half-cycle 10ms. To ensure the reliability of data transmission. (4) in the experimental test part, the serial port debugging assistant software is used to debug the system, and the circuit parameters are fine-tuned by collecting waveform analysis. The change of load characteristics has a great influence on the amplitude of the waveform, but the waveform is complete, which achieves the purpose of QPSK phase modulation. Finally, the feasibility of the design is proved by the operation and debugging of the underwater data transmission system. The whole system realizes the acquisition of seven sensing signals on the pipeline of the oil production tree model, and the accuracy is more than 0.2. The stability and reliability of the system are verified by the continuous operation of the system in the whole underwater test platform for a long time.
【学位授予单位】：上海工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE95
本文编号：2479671
[Abstract]:As the key equipment of offshore oil and gas exploration, the reliable and stable work of underwater production system is the premise and guarantee of underwater safety production. The underwater control system can collect the parameters of seafloor production process in real time and upload it to the water control station to realize the real-time monitoring of the working condition of underwater production. Power line carrier communication is to modulate the data information to a certain frequency of high frequency carrier and coupling it to the power line for transmission and transmission. Therefore, the power line communication transmission technology based on umbilical cord cable can adapt to the working characteristics of deep water production system. It not only solves the problem of long distance transmission, but also reduces the complexity of submarine wiring and saves the production cost. However, the research of underwater power carrier communication technology in our country is still in its infancy. In this paper, the research on underwater power carrier technology is carried out, and the following gains are obtained: (1) the topological structure of underwater production system is introduced. This paper expounds the function of each node module of underwater power carrier transmission, and analyzes the influence of EPU, umbilical cord cable power line and underwater control system modulation and demodulation on underwater power carrier data transmission. The characteristics of underwater power communication are summarized. (2) based on the discussion of spread spectrum and orthogonal frequency division multiplex (OFDM) communication technology, the spread spectrum phase modulation carrier chip Mi200e and the main control single chip microcomputer are selected. The hardware circuit of underwater power carrier data transmission system is designed. After the sensing signal on the oil tree tube is collected by the main controller through the signal amplification circuit, the A / D conversion is carried out, and the data transmission between the main controller and the carrier chip is realized by using SPI serial communication. The carrier chip modulates the received data by QPSK, and passes through the Mi200e built-in power signal amplification circuit and the designed narrow band filter coupling circuit. The transmission and reception of data in umbilical cable power line is realized. (3) based on the analysis of the communication protocol of carrier chip Mi200e, the transmission and reception flow of underwater power carrier communication is described in detail. According to the transmission characteristics of the power supply network, zero-crossing detection technology is used to send three data packets in AC half-cycle 10ms. To ensure the reliability of data transmission. (4) in the experimental test part, the serial port debugging assistant software is used to debug the system, and the circuit parameters are fine-tuned by collecting waveform analysis. The change of load characteristics has a great influence on the amplitude of the waveform, but the waveform is complete, which achieves the purpose of QPSK phase modulation. Finally, the feasibility of the design is proved by the operation and debugging of the underwater data transmission system. The whole system realizes the acquisition of seven sensing signals on the pipeline of the oil production tree model, and the accuracy is more than 0.2. The stability and reliability of the system are verified by the continuous operation of the system in the whole underwater test platform for a long time.
【学位授予单位】：上海工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE95
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