【摘要】 介绍高性能超声电视成像测井仪器,通过提高换能器激励电压,使之适应裸眼井、重泥浆环境下的测井,通过提高换能器转速提高图像的纵向分辨率。选用高集成度的DSP、FPGA芯片和低电压的模拟器件设计电路,降低了电路的功耗,延长了仪器的工作时间。为提高成像精度,采用12 bit的A/D转换器采集回波信号峰值。现场实验结果表明仪器取得了较原有仪器更好的测井效果。更多还原

【Abstract】 Described is a high performance ultrasonic TV imaging logging tool.By improving the transducer excitation voltage,the tool can work in open hole and heavy mud environment,and by increasing the transducer’s rotation speed,the vertical resolution of images has been improved.High-level integration DSP and FPGA chips and low-voltage analog devices are chosen for the analog circuit design,thus reducing the power consumption of the circuit and extending the working time of the tool.In order to improve imaging accuracy,12 bit A/D converter is used to acquire signals.The tool has acquired better log data than the original tool.更多还原