作者：李辉, 韦进强, 李阳, 张涛

作者单位：四川大学制造学院, 四川成都 610065

关键词：清管器; 跟踪定位; 发射机; 超低频电磁波; 节电模式

摘要：

现有的以555芯片产生间断超低频(23 Hz左右)电磁脉冲的电子清管器发射机系统会带来频率漂移、各组振荡间的相位关系随机不恒定及静态功耗偏大的问题。为此利用89C2051编程产生间断的超低频脉冲信号,解决了频率漂移及振荡间的相位关系随机的问题。通过采取配置合适的晶振和电源电压措施,并在软件设计部分充分利用单片机休眠模式的低功耗特性,解决了功耗问题。经测试频率稳定在23 Hz0.01 Hz,振荡间的相位关系恒定,有效工作时间由60 h提高至100 h。

Improvement and research of transmitter system of electronic pipeline pig

LI Hui, WEI Jin-qiang, LI Yang, ZHANG Tao

School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China

Abstract: The existing transmitter system of electronic pipeline pig based on 555 chip to produce intermittent ultra-low frequency electromagnetic pulse(about 23 Hz) brought about many problems such as the frequency drift, not constant phase-relationship between groups of oscillations and too large static power. Therefore the signal of intermittent ultra-low frequency pulses was produced by 89C2051 programming. Problems of the frequency drift and not constant phase-relationship between groups of oscillations were solved. Through the appropriate allocation of the crystal and power supply and making full use of the MCU's sleep mode of low-power consumption in the software design, the power problem was solved. The testing frequency stability was 23 Hz±0.01 Hz. The phase-relationship between groups of oscillations was constant and effective working hours was risen from 60 hours to 100 hours.

Keywords: Pipeline pig; Track and localization; Transmitter; Ultra-low frequency electromagnetic wave; Power saving mode

2009, 35(2): 116-119  收稿日期: 2008-10-4;收到修改稿日期: 2008-12-19

基金项目: 成都市科技攻关项目(06GGYB254GX-034)

作者简介: 李辉(1983-),男,硕士研究生,专业方向为光电精微测试技术。

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