Three dimensional sonic logging data high-speed transmission device based on LVDS technology

Abstract

The invention discloses a three dimensional sonic logging data high-speed transmission device based on an LVDS (Low Voltage Differential Signaling) technology. Firstly, a ground control system issues control commands, a pinboard receives commands through an LAN (local area network) port and downloads the commands to a control panel through an Mcbsp (Multichannel Buffercd Scrial Port) interface, and command control and high-speed serial transmission of three dimensional logging sound wave data can be achieved by using an LVDS (Low Voltage Differential Signaling) interface. The LVDS communication interface technology refers that data transmission is performed by using extremely low voltage swing in a high-speed differential manner, has the advantages of low noise, excellent common mode inhibiting capability and low power consumption, and can integrate a circuit into a systematical IC (integrated circuit), thereby overcoming problems of far distance sonic logging data transmission, complex circuit working environment and high possibility of external interferences to three dimensional sonic logging signal, and high-speed date transmission between the control panel and the collection board can be accurately achieved in a real time manner.

Description

technical field [0001] The invention belongs to the technical field of high-speed transmission of well logging signals, and more specifically relates to a high-speed three-dimensional acoustic logging data transmission device based on LVDS (Low-Voltage Differential Signaling) technology, which is suitable for working in high-temperature and harsh environments underground. High-speed transmission of data between the control board and the acquisition board during the 3D acoustic logging process. Background technique [0002] 3D acoustic logging is a new generation of acoustic logging technology developed on the basis of cross-dipole acoustic logging technology. Comprehensive measurement of the waveforms of various frequency bands to obtain the three-dimensional acoustic wave characteristics of the formation, that is, the changes of compressional wave time difference, shear wave and Stoneley wave in the axial, radial and circumferential directions of the wellbore, and provide a...

AI Technical Summary

Problems solved by technology

[0003] Traditional acoustic logging only measures acoustic signals in specific frequency bands, and the amount of measured data is small, so the low-speed transmission method can meet the requirements for data transmission speed

However, the amount of data measured by 3D acoustic logging is very large, and it is difficult to meet the requirements of real-time measurement by using low-speed transmission.

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