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为了满足现代海洋高分辨率地震勘探对发射震源在声信号特性、重复性、稳定性等方面的要求,介绍了一种等离子体震源(PSS)系统及在该方面的应用。针对基于海水中脉冲电晕放电技术开发的等离子体震源设备,分别从电路基础分析、等离子体放电过程和气泡脉动、脉冲声波辐射3个方面进行了理论分析和实验研究,给出了单电极条件下电源能量效率、气泡脉动、声波辐射的实验结果。同时介绍了近9a来等离子体震源的研发历程,单脉冲能量为500J、10kJ、50kJ等典型样机的设计参数和设备特点,阐述了设备在高分辨率海洋地震勘探领域的成功应用,以及在水声领域的应用前景。
In order to meet the requirements of modern high-resolution marine seismic exploration on the acoustic source characteristics, repeatability and stability of the seismic source, a plasma source (PSS) system and its applications are introduced. Aiming at the plasma source equipment developed based on the pulse corona discharge technology in seawater, the theoretical analysis and experimental research are carried out on the basis of circuit analysis, plasma discharge process, bubble pulsation and pulsed sound wave radiation respectively. The single electrode condition Under the power energy efficiency, bubble pulsation, the experimental results of acoustic radiation. At the same time, the research and development history of plasma sources in recent 9 years are introduced. The design parameters and equipment characteristics of typical prototypes such as 500J, 10kJ, 50kJ single pulse energy are described. The successful application of the equipment in high resolution marine seismic exploration is described. Acoustic field of application prospects.