CAJ | 학술논문

针对井下随钻电阻率测量工作环境恶劣，微弱信号常常难以精确测量和保证稳定的问题，设计一种不同于常规模拟检波的数字检波算法。该算法可克服模拟检波电路的固有电路误差、温度变化等对检测数据的影响，能够精确进行小信号的滤波与检测。为检验其可行性，使用Matlab对算法进行了仿真验证，仿真结果显示，可有效克服不同种类噪声、不同信号相位变化的影响。经过实际应用显示，该算法可明显提高检波精度，保证数据稳定性。
침대정하수찬전조솔측량공작배경악렬，미약신호상상난이정학측량화보증은정적문제，설계일충불동우상규모의검파적수자검파산법。해산법가극복모의검파전로적고유전로오차、온도변화등대검측수거적영향，능구정학진행소신호적려파여검측。위검험기가행성，사용Matlab대산법진행료방진험증，방진결과현시，가유효극복불동충류조성、불동신호상위변화적영향。경과실제응용현시，해산법가명현제고검파정도，보증수거은정성。
This digital demodulation algorithm was designed to solve the problems of resistivity MWD,and to improve the measuring accuracy and stability in the hard environment. The algorithm can overcome the influence of the inherent errors of ana-log demodulation circuits and the temperature change on the test data,and can realize the precise filtering and test of small sig-nals. The feasibility of the algorithm was verified with the simulation software Matlab. The simulation result indicates that the al-gorithm can effectively reduce the effect caused by different noises and signal phase variation. The practical application result shows that the algorithm can obviously enhance the demodulation accuracy of the measuring circuit and ensure the stability of test data.