浅层地震勘探中的无线同步装置研究
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摘要
为更好地解决浅层地震勘探信号采集的时间同步问题,提出一种基于无线网络的浅层地震勘探数据采集系统。设计并完善基于应变式压力传感器的检波装置,以AT89C51单片机作为主控制器(MCU:Micro Controller Unit),采用低功耗、高分辨率的16位Σ-Δ型模数转换芯片AD7705实现数据采集,选用nRF24L01组建无线网络,给出电源模块和稳压电路以实现准确灵活供电。通过确定数据采集系统不同传输距离的实际时间差值,利用地震仪进行时间补偿,从而实现数据采集同步。测试结果表明:系统在测试期间功耗为2 500 mW,无线传输最远距离为94 m,延迟时间最短为1.87×10-6s。解决了勘探环境恶劣时的复杂布线和同步问题,实现了浅层地震勘探的低功耗、便携式的同步功能。
In order to solve the time synchronization problem of shallow seismic prospecting signal acquisition,a data acquisition system of shallow seismic exploration based on wireless network is presented.It uses AT89C51 micro-controller as the main controller,uses AD7705 modulus conversion chip with low power consumption and high resolution to realize data collection,chooses nRF24L01 to set up wireless network.In accordance with the characteristics of modulus conversion unit and MCU,the power module and the voltage stabilizing circuit are designed to realize accurate flexible power supply.By determining the real-time data of different transmission distance,using seismograph for time compensation the data acquisition synchronization is realized,solving the complex wiring and synchronization problems when the conditions for exploration,realizing low-power,portable and synchronization function in the shallow seismic exploration.Tests show that the system power consumption is 2 500 mW,the wireless transmission distance is 94 m,and transmission delay time is less than 1.87 μs.
In order to solve the time synchronization problem of shallow seismic prospecting signal acquisition,a data acquisition system of shallow seismic exploration based on wireless network is presented.It uses AT89C51 micro-controller as the main controller,uses AD7705 modulus conversion chip with low power consumption and high resolution to realize data collection,chooses nRF24L01 to set up wireless network.In accordance with the characteristics of modulus conversion unit and MCU,the power module and the voltage stabilizing circuit are designed to realize accurate flexible power supply.By determining the real-time data of different transmission distance,using seismograph for time compensation the data acquisition synchronization is realized,solving the complex wiring and synchronization problems when the conditions for exploration,realizing low-power,portable and synchronization function in the shallow seismic exploration.Tests show that the system power consumption is 2 500 mW,the wireless transmission distance is 94 m,and transmission delay time is less than 1.87 μs.
引文
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[13]王顺,顾叶丹,熊继平.基于nRF24L01无线网络的单片机应用设计[J].仪器仪表学报,2010,31(8):55-57.WANG Shun,GU Ye-dan,XIONG Ji-ping.MCU Application Design of Wireless Network Based on nRF24L01[J].Journal of Instruments and Meters,2010,31(8):55-57.
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[15]王胜源,张洪武,赵凯,等.无线收发模块在多机通信中的设计与实现[J].吉林大学学报:理学版,2006,44(3):470-472.WANG Sheng-yuan,ZHANG Hong-wu,ZHAO Kai,et al.Design and Realization of Wireless Transceiver Module in Communication of Many Machines[J].Journal of Jilin University:Science Edition,2006,44(3):470-472.
[2]谢里夫R E,吉尔达特L P.勘探地震学[M].初英,等译.北京:石油工业出版社,1999:1-35.SHARIF R E,JILL DUTT L P.Exploration Seismology[M].Beijing:Petroleum Industry Press,1999:1-35.
[3]罗福龙.地震勘探仪器技术发展综述[J].石油仪器,2005,19(2):1-5.LUO Fu-long.The Review of Seismic Prospecting Instruments Technology Development[J].Journal of Petroleum Equipment,2005,19(2):1-5.
[4]任家富,李怀良,陶永莉.地震数据采集无线同步技术研究[J].中国测试技术,2008,34(15):1-3.REN Jia-fu,LI Huai-liang,TAO Yong-li.Study of Wireless Synchronization Seismic Data Acquisition Technology[J].China Measurement Technology,2008,34(15):1-3.
[5]李太全,孙先松.无线网络浅层地震勘探仪的低功耗设计[J].电子测量技术,2012,35(12):28-34.LI Tai-quan,SUN Xian-song.Low-Power Design of Shallow Seismograph Based on Wireless Network[J].Journal of Electronic Measurement Technology,2012,35(12):28-34.
[6]李怀良,度先国,杜勇,等.基于无线通信技术的遥测式地震数据采集技术研究[J].中国地球物理,2011(16):519.LI Huai-liang,DU Xian-guo,DU Yong,et al.Study of Telemetric Seismic Data Acquisition Technique Based on Wireless Communication[J].Chinese Geophysics,2011(16):519.
[7]张林行.基于接力式以太网的可控震源地震勘探数据传输技术研究[D].长春:吉林大学仪器科学与电气工程学院,2007.ZHANG Lin-hang.Study on Data Transmission Techniques Based on Relay Ethernet in Seismic Exploration Using Vibroseis[D].Changchun:College of Instrumentation&Electrical Engineering,Jilin University,2007.
[8]陆慧,沈庆宏,陈策,等.基于Imote2的WSN桥梁结构健康监测系统无线传输研究[J].现代电子技术,2010,(21):30-34.LU Hui,SHEN Qing-hong,CHEN Ce,et al.Wireless Transmission of WSN Bridge Health Monitoring System Based on Imote2[J].Modern Electronic Technology,2010(21):30-34.
[9]李肃义,张红晶,陆霞,等.基于Zigbee的无导联线动态心电监测系统设计[J].吉林大学学报:信息科学版,2012,30(5):451-455.LI Su-yi,ZHANG Hong-Jing,LU Xia,et al.Wireless Dynamic ECG Monitoring System Based on ZigBee Technology[J].Journal of Jilin University:Information Science Edition,2012,30(5):451-455.
[10]徐斌,毕光国.超宽带脉冲无线传输技术[N].计算机世界,2004-10-11(B06).XU Bin,BI Guang-guo.Discussion on Ultra-Wideband Pulse Wireless Transmission Technology[N].Computer World,2004-10-11(B06).
[11]唐岚,王树勋,孙晓颖,等.超宽带无线传输技术[J].吉林大学学报:工学版,2004,34(2):331-334.TANG Lan,WANG Shu-xun,SUN Xiao-ying,et al.Ultra Broadband Wireless Transmission Technology[J].Journal of Jilin University:Engineering and Technology Edition,2004,34(2):331-334.
[12]杨磊.基于FPGA的呼吸机数据采集系统研究[D].长春:吉林大学机械科学与工程学院,2006.YANG Lei.The Research of the FPGA-Based Data Collection System of Respirator[D].Changchun:College of Mechanical Science and Engineering,Jilin University,2006.
[13]王顺,顾叶丹,熊继平.基于nRF24L01无线网络的单片机应用设计[J].仪器仪表学报,2010,31(8):55-57.WANG Shun,GU Ye-dan,XIONG Ji-ping.MCU Application Design of Wireless Network Based on nRF24L01[J].Journal of Instruments and Meters,2010,31(8):55-57.
[14]韦积慧.基于nRF24L01无线网络设计与实现[D].长春:吉林大学通信工程学院,2012.WEI Ji-hui.Design and Implementation of Wireless Network Based on nRF24L01[D].Changchun:College of Communication Engineering,Jilin University,2012.
[15]王胜源,张洪武,赵凯,等.无线收发模块在多机通信中的设计与实现[J].吉林大学学报:理学版,2006,44(3):470-472.WANG Sheng-yuan,ZHANG Hong-wu,ZHAO Kai,et al.Design and Realization of Wireless Transceiver Module in Communication of Many Machines[J].Journal of Jilin University:Science Edition,2006,44(3):470-472.
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