随钻测井仪器至今已经发展为三代,第一代可提供基本的方位和地层评价测量。第二代随着电子电路技术的飞速发展,可提供更多的井下测量参数,同时也可实现由地面向井下传输指令数据,这其中的代表技术是旋转导向以井下地层电阻率和方位伽马...随钻测井仪器至今已经发展为三代,第一代可提供基本的方位和地层评价测量。第二代随着电子电路技术的飞速发展,可提供更多的井下测量参数,同时也可实现由地面向井下传输指令数据,这其中的代表技术是旋转导向以井下地层电阻率和方位伽马测量等。第三代称为LWD测井技术(Logging While Drilling),在钻井的同时,实时地得到各项所需的地层参数,并能实现地层的实时绘制。而在第三代测井仪器中,需要随时将井下的仪器状态和测量数据传输到地面工控机,也随时需要从地面对井下的仪器下达指令,这个过程需要大量使用数据及信号通讯传输模块,基于数学模型,设计了一种可应用于井下主控电路的数据及信号通讯传输模块。展开更多
To detect the deformation of the tunnel structure based on image sensor networks is the advanced study and application of spatial sensor technology. For the vertical settlement of metro tunnel caused by internal and e...To detect the deformation of the tunnel structure based on image sensor networks is the advanced study and application of spatial sensor technology. For the vertical settlement of metro tunnel caused by internal and external stress after its long period operation, the overall scheme and measuring principle of tunnel deformation detection system is in- troduced. The image data acquisition and processing of detection target are achieved by the cooperative work of image sensor, ARM embedded system. RS485 communication achieves the data transmission between ARM memory and host computer. The database system in station platform analyses the detection data and obtains the deformation state of tunnel inner wall, which makes it possible to early-warn the tunnel deformation and take preventive measures in time.展开更多
文摘随钻测井仪器至今已经发展为三代,第一代可提供基本的方位和地层评价测量。第二代随着电子电路技术的飞速发展,可提供更多的井下测量参数,同时也可实现由地面向井下传输指令数据,这其中的代表技术是旋转导向以井下地层电阻率和方位伽马测量等。第三代称为LWD测井技术(Logging While Drilling),在钻井的同时,实时地得到各项所需的地层参数,并能实现地层的实时绘制。而在第三代测井仪器中,需要随时将井下的仪器状态和测量数据传输到地面工控机,也随时需要从地面对井下的仪器下达指令,这个过程需要大量使用数据及信号通讯传输模块,基于数学模型,设计了一种可应用于井下主控电路的数据及信号通讯传输模块。
基金Science and Technology Commission of Shanghai Municipality(No.08201202103)
文摘To detect the deformation of the tunnel structure based on image sensor networks is the advanced study and application of spatial sensor technology. For the vertical settlement of metro tunnel caused by internal and external stress after its long period operation, the overall scheme and measuring principle of tunnel deformation detection system is in- troduced. The image data acquisition and processing of detection target are achieved by the cooperative work of image sensor, ARM embedded system. RS485 communication achieves the data transmission between ARM memory and host computer. The database system in station platform analyses the detection data and obtains the deformation state of tunnel inner wall, which makes it possible to early-warn the tunnel deformation and take preventive measures in time.
