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digital telemetry
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  数字遥测
     Property and characters of I/O System Four full digital telemetry seismograph and compare with former seismographs.
     I/O System Four全数字遥测地震仪的性能、特点及与以往地震仪器的对比
短句来源
     The design of signal transmission in Lanzhou digital telemetry seismic network
     兰州数字遥测地震台网信号传输方式的设计
短句来源
     Design of Digital Telemetry Receiving Device of a Missile Flight Control System
     某导弹飞控系统数字遥测信息接收装置的设计
短句来源
     System Four TM seismic data acquisition system is totally-new multiple component digital telemetry seismic acquisition system produced by American I/O Co.
     SystemFourTM地震数据采集系统是美国I/O公司推出的全新多分量数字遥测地震采集系统。
短句来源
     THE CONSTRUCTION OF LANZHOU DIGITAL TELEMETRY SEISMIC NETWORK
     兰州数字遥测地震台网的建设
短句来源
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  “digital telemetry”译为未确定词的双语例句
     Management and service of data of local digital telemetry seismic network
     区域遥测地震台网数据管理与服务
短句来源
     The development of urumqi digital telemetry seismic network
     乌鲁木齐遥测地震台网的发展
短句来源
     By using the digital data recorded by xi'an digital telemetry seismic network,the temporal change in coda Q before and after Linyi earthquake with ML5. 0 in July,1998 is determined through the method for half period of the first arrival P wave. It is pointed that the Q value is 87-203 before the earthquake and is 67-164 after the earthquake, and clearly anomaly with high Q value appeared in the nearby areas of the epicenter before the earthquake.
     利用西安数字地震遥测台网记录的数字地震资料,采用P波初动半周期残差法求得了1998年7月临猗5.0级地震前后不同路径的Q值变化,发现在地震发生前Q在87-203之间,震后Q在67-164之间,震前震中区附近出现了明显的高Q值异常。
短句来源
     Application of DDN in Guangdong Digital Telemetry Seismographic Network
     数字通信网络在广东数字地震遥测台网中的应用
短句来源
     Comparison of Some Methods for Estimating Ambient Shear Stress Based on the Data of Guangdong Digital Telemetry Seismic Wave
     利用广东数字地震波资料对比分析计算环境剪应力场的方法
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  相似匹配句对
     Digital
     数字
短句来源
     Digital Technology Research in Telemetry Receiver
     遥测接收机中的数字化技术研究
短句来源
     THE CONSTRUCTION OF LANZHOU DIGITAL TELEMETRY SEISMIC NETWORK
     兰州数字遥测地震台网的建设
短句来源
     DIGITAL CAMPUS
     数字化校园的理性思考
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  digital telemetry
Data are logged on-site and in parallel transferred to a remote station by digital telemetry.
      
The data acquisition has evolved from analog telemetry systems to the present day heavy use of PCM digital telemetry.
      
Average errors for azimuth and slowness measurements obtained by this method using data of Xi'an Digital Telemetry Seismic Network are 2.0° and 0.34 s/(°), respectively.
      
With digital telemetry, these stations would have sufficient band-widthformany waveform studies.
      
Features and benefits of rotary transformer and digital telemetry signal transmission.
      
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The type 768 radio seismic telemetry equipment has been designed for the use in case when installation between points of a seismic station network is difficult or in those places where the line capacity is not enough. Of course, it can also meet the need in the areas immediately after the occurrences of destructive earthquakes.It consists of a pair of ultra shortwave transmitter and receiver. A double frequency modulation was adopted. Not only it can be directly connected to a single component short period seismometer...

The type 768 radio seismic telemetry equipment has been designed for the use in case when installation between points of a seismic station network is difficult or in those places where the line capacity is not enough. Of course, it can also meet the need in the areas immediately after the occurrences of destructive earthquakes.It consists of a pair of ultra shortwave transmitter and receiver. A double frequency modulation was adopted. Not only it can be directly connected to a single component short period seismometer to transmit seismic analogue signals within the frequency range of 0.5 hz to 25 Hz, but also be used in combination with the specially designed multiple-channel digital telemetry system to transmit 0.2 Hz to 20 Hz CHDB4 code (compatible high density binary code). Therefore this equipment is capable to transmit signals like geoelectirc, geomagnetic, ground stress, ground tilt and many other geophysical quantities.Since July 1977, this equipment has been put to actual transmision test at the seismic station networks of Peking, Shanghai and Tientsin. After that, it was installed at the seismic station network of Kunming for more than one year. The results show that this equipment is superior in its portability, sensitivity, stability and immunity from disturbances. For a sufficient antenna height, the distance of transmission can reach about 115 kilometers.

“768无线地震遥测设备”是为在电信传输地震台网的网点间不易架设明线,或线路容量不足的场合使用而专门设计的,当然,也可用于受大地震破坏的现场.该设备是由一对超短波发射机与接收机构成,采用二次调频.它既可直接与单分向短周期地震计连接传输0.5HZ—25HZ 的地震模拟信号,也可直接与专门设计的多路数字前兆遥测设备配合使用传输0.2HZ—20HZ 的 CHDB_4码(相容高密度二进制码).因而可用来传输地电、地磁、地应力、地倾斜等多种地球物理量.该仪器自1977年7月起先后在北京、上海、天津台网进行了实地传输试验,其后又在昆明地震台网使用了一年多.结果表明,该仪器轻便、灵活、稳定、可靠,有较强的抗干扰性.当天线架设高度足够时,最远传输距离可达115公里.

To overcome the insufficiency of seismic analog radiotelemetering system which is popularly used in our country,a multirange autoselected seismic telemetry system as well as its principle and observational results are described in this paper. The overall dynamic range will be enlarged to 90-100dB and the standby power consumption will be less then lw, when this scheme is used. The accuracy of digital telemetry is also discussed in this paper.

介绍多量程自动选通地震模拟遥测系统的工作原理及使用结果。采用此方案,综合动态范围可扩大到90-100dB,用事件判别触发发射的办法,维持功耗可小于1w。

The CBIL instrument is a new generation of logging tool,using microelectronics,digital telemetry systems,and acoustic transducer technology. As the tool is pulled up the borehole,a rotating transducer operating in pulse echo mode is scanning the entire circumference of the well. The transducer sends a sound pulse to the borehole wall and receives the reflected acoustic pulse from that portion of the formation. For each sound pulse,two parameters are measured and recorded: the amplitude of the reflected...

The CBIL instrument is a new generation of logging tool,using microelectronics,digital telemetry systems,and acoustic transducer technology. As the tool is pulled up the borehole,a rotating transducer operating in pulse echo mode is scanning the entire circumference of the well. The transducer sends a sound pulse to the borehole wall and receives the reflected acoustic pulse from that portion of the formation. For each sound pulse,two parameters are measured and recorded: the amplitude of the reflected acoustic peak and the travel time of the reflected acoustic signai. The transducer rotates 6 times per second,aquiring 250 amplitude and travel time samples per revolution. The CBIL data are recorded in the scanning mode for full coverage of type borehole wall. The logging speed is typically about 3m/min.An advanced postprocessing computer programme can generate well site plots in black,white and gray tone images. The images can identify porosity type,bedding characteristics,and petrophysical parameters.Besides that,the images can visually quantify the area of a borehole wall occupied by fractures and vugs.The images can be used in well-to-well comparisons for prediction of lateral and vertical facies changes,confirmation of the sedimentary environment,and reservoir characterizaiton. This paper also describes the examples of runing the CBIL,together with gamma ray spectral instruments and six-arm dipmeter tool,to detect the borehole geometry,thin beds,fracture and porosity.

电测井工具是利用微电子、数字遥控系统及声传感技术的新一代测井仪,将其沿井身上提时,旋转传感器以脉冲反射模式扫描井身周围,接收井壁地层的反射声脉冲,并进行数据采集,经计算机软件处理使图象显示成黑、白和灰色,从而鉴定孔隙类型、层理特点及岩石特性参数,直接量化了井壁中裂缝和孔洞的面积。可用于井间对比以预测侧向和垂向的岩相变化,确认沉积环境、强化油层特性描述。并叙述了与伽马测井仪、六臂倾角测量仪等同时使用,以探测井身几何形状、薄层、裂缝和孔隙度的方法。

 
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