作者：梁世盛, 师奕兵, 李焱骏
作者单位：电子科技大学自动化工程学院, 四川 成都 611731
关键词：激励源; 调幅波; PIC单片机; 油基泥浆
摘要：
针对油基泥浆的不导电特点,采用Microchip公司生产的单片机PIC16F876和XILINX公司的CPLD XC9572设计实现了一种频率和幅度均可调的调幅波激励源。对于井下恶劣的环境和测井的不同需求,重点讨论了激励源的信号频率和幅度的调节以及对发射信号的实时监控方法。系统由控制电路、载波调制波获取电路、调幅波获取和电压检测电路组成。实验结果表明:激励源的调幅波频率和幅度可程控,信号发射稳定,带负载能力强,信噪比达到30 dB。
Design of exciting source for oil-based mud
LIANG Shi-sheng, SHI Yi-bing, LI Yan-jun
School of Automation, University of Electronic Science and Technology of China, Chengdu 611731, China
Abstract: According to the non-conductive characteristics of oil-based mud, the authors design and implement AM wave excitation source whose frequency and amplitude can be adjusted by using SCM PIC16F876 from Microchip and CPLD XC9572 from XILINX. For the hostile environment of the underground and the different needs of the well logging, it emphatically discussed the adjustment method of the frequency and amplitude of the signal and the real-time monitoring method of transmitting signals. The system consists of control circuit, carrier and modulation wave acquisition circuit, amplitude modulation wave acquisition circuit and the voltage detection circuit. Finally, the experimental results show that the excitation source is stable with high load drive, its signal to noise ratio reaches 30 dB, and the frequency and amplitude of excitation signal are programmable.
Keywords: excitation source; AM wave; PIC microcontroller; oil-based mud
2012, 38(3): 90-93 收稿日期: 2011-5-19;收到修改稿日期: 2011-8-5
基金项目:
作者简介: 梁世盛(1985-),男,浙江温州市人,硕士研究生,专业方向为测控技术。
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