相控阵井壁成像仪高压电源纹波噪声抑制研究

发布时间：2018-04-18 14:28

  本文选题：超声相控阵 + 直流稳压电路　； 参考：《应用声学》2017年04期

【摘要】：针对超声相控阵井壁成像仪工作环境恶劣以及超声脉冲发射所需高压电源纹波噪声对超声回波信号干扰大的问题,提出一种高温环境下高压电源纹波噪声抑制方法并进行设计分析。本方法综合开关电源与线性稳压电源各自的技术优势且注重纹波噪声抑制和耐高温设计。利用开关电源完成不同电压幅值的高效转换并在电源输出端增设专门的EMI滤波电路,再利用屏蔽罩对电源进行屏蔽,最后输出电压再经过一级线性稳压电路进一步进行稳压滤波。实测结果表明,利用该方法,电源的纹波与辐射噪声得到了抑制,有效减少电源对回波信号的干扰,且输出电压稳定,提高了超声相控阵井壁成像仪井下工作的稳定性。
[Abstract]:In view of the bad working environment of ultrasonic phased array well wall imager and the serious interference of the ripple noise of high voltage power supply required for ultrasonic pulse transmitting, the ultrasonic echo signal is interfered with.A method for suppressing ripple noise of high voltage power supply under high temperature is proposed and analyzed.This method combines the technical advantages of switching power supply and linear power supply, and pays attention to the design of ripple noise suppression and high temperature resistance.The switching power supply is used to realize the high efficiency conversion of different voltage amplitudes, and the special EMI filter circuit is added to the output end of the power supply, and then the power supply is shielded by the shield cover.Finally, the output voltage is further filtered through the first stage linear voltage regulator circuit.The measured results show that the ripple and radiation noise of the power supply are suppressed, the interference of the power supply to the echo signal is effectively reduced, and the output voltage is stable, which improves the working stability of the ultrasonic phased array well wall imager.
【作者单位】： 中国科学院声学研究所声场声信息国家重点实验室;中国科学院大学;中海油田服务股份有限公司油田技术事业部油田技术研究院;
【基金】：国家自然科学基金项目(11374324,11474308)
【分类号】：TB55
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本文编号：1768756