作者:曹微, 师奕兵, 王志刚, 张伟
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:微电阻率成像测井; 发射电路; pwm控制; pic单片机; 半桥
摘要:
针对微电阻率成像测井仪的特点, 设计了一种基于pwm方式的正弦信号发射源。该系统以pic单片机为主控芯片, 并利用其产生的pwm信号, 经半桥功率放大, 低通滤波, 最后由变压器输出正弦波, 为微电阻率成像测井提供信号激励源。实验结果表明, 正弦波幅度满足采集电路要求, 信噪比满足数据处理电路要求。发射电路已成功运用于实际仪器中, 取得了良好的应用效果。
design of transmitting circuit for micro-resistivity imaging logging tool
cao wei, shi yi-bing, wang zhi-gang, zhang wei
school of automation engineering, university of electronic ssience and technology of china, chengdu 611731, china
abstract: in this paper, a sine wave transmitter source based on pwm source was designed according to the features of micro-resistivity imaging logging. pic microprocessor is used as the master control chip of the system. after amplified by half-bridge power amplifier and filtered by low-pass filter, the pwm signal produced by the pic chip is exported as sine wave by a transformer. the sine wave voltage is used as the driving source for micro-resistivity imaging logging. the experiment results showed that amplitude of the sine wave can meet the requirements of acquisition circuit and snr of the sine wave can meet the requirements for data processing circuit. the transmitting circuit has been successfully applied in actual tool and good effect were achieved.
keywords: micro-resistivity imaging logging; transmitting circuit; pwm; pic; half-bridge
2011, 37(1): 70-73 收稿日期: 2010-1-20;收到修改稿日期: 2010-4-7
基金项目: 中海油企业发展基金(jskf2007yj16)
作者简介: 曹微(1984-),男,四川成都市人,硕士研究生,专业方向为石油工程测井相关信号激励源设计。
参考文献
[1] 原宏壮, 陆大卫. 测井技术新进展综述[j]. 地球物理学进展, 2005, 20(3):786-795.
[2] 王 珺, 杨长春, 许大华, 等. 微电阻率扫描成像测井方法应用及发展前景[j]. 地球物理学进展, 2005, 20(2):357-364.
[3] 程 希, 任战利, 韩宗完. wdsa微扫测井测斜系统电路设计[j]. 地球物理学进展, 2009, 24(2):791-796.
[4] 高 冰, 吴亚锋, 裘 炎, 等. 基于pic单片机的测井系统激励信号源研制[j].石油矿场机械, 2008, 24(11):13-15.
[5] 张明峰. pic单片机入门于实战[m]. 北京:北京航空航天大学出版社, 2004.
[6] 陈晓萍, 王念春, 马玉龙. 基于pic单片机的spwm控制技术[j]. 电源技术应用, 2006, 9(3):39-42.
[7] 李绍杰. 基于ir21844的电机驱动控制系统[j]. 2008, 10(1):39-41.
[8] 王兆安, 黄 俊. 电力电子技术[m]. 北京:机械工业出版社, 2000.
[9] 孟庆波, 曲素荣. spwm控制方法浅析[j]. 郑州铁路职业技术学院学报, 2007, 19(4):14-15.
[10] 王熙荣, 罗菊兰, 张 龙, 等. 增强型微电阻率成像测井资料的应用[j]. 测井技术, 2007, 31(3):262-266.

