The Design Of Multi-channel Synchronous Seismic Data Acquisition System

Data acquisition system is mainly divided into two categories: single c\up microprocessor as the core of data acquisition system and data acquisition system based on general microcomputer. The former is mainly used in wireless distributed applications, which is mainly used in cable, with strong ability, acquisition of high precision, strict synchronization of petroleum exploration areas. In a data acquisition system, synchronous acquisition and real-time processing technology have played an important role to improve the acquisition precision of data acquisition system With the development of wireless communication technology, wireless distributed data acquisition system based on single chip microprocessor is using wider and wider in application fields. It overcomes the wired data acquisition system common existing problems in today: large amount of cabling consumables, high cost, the more power consumption, poor expansibility, lines easy to aging and so onThis paper based on C8051F020 microcontroller?Xbee-Pro wireless radio frequency module, AI-GPS-V04 GPS module and seismic sensors, designed a multi-channel wireless synchronous data acquisition system The system with C8051F020 single chip microcomputer as main control chip, using GPS positioning module output of PPS pulse as the distributed data acquisition unit A/D synchronous sampling signal, using radio frequency module Xbee Pro to realize the commands and data transmission between the upper machine control center and the lower level computer data acquisition unit. PC human-computer interface using Microsoft Visual Studio 2008 software writing.The whole system real-time control by the PC humancomputer interface sofeware through remote command.Aim at the design of multi-channel wireless synchronous seismic data acquisition system, In order to simplify the system design process, improve the quality of circuit design and system maintainability of the late, the system adopts modular design. System mainly consists of the following six functional modulesihe main controller module, the seismic data acquisition module? the Xbee-Pro wireless transmission module, GPS synchronization module, power supply module, human-computer interaction module.Finally, adopting the distributed wireless design of multi-channel wireless synchronous ABSTRACT data acquisition system, after the project feasibility analysis?overall scheme design, hardware circuit design, software program code, each of module function test & debug, and the field experiment. The experimental results show that the system can realize the strict synchronization acquisition, the multi-channel wireless synchronous seismic data acquisition system working steady, simple operation and high value of engineering application. Provide a reference for design of all kinds of distributed system solutions.