U-blox M8在节点仪器施工中的应用探索

Exploration of U-blox M8 in node instrument construction

石油物探生产中的节点检波器,大多采用了U-blox定位芯片用于采集作业的时间同步,其定位功能未充分开发利用。本文以U-blox EVK-M8T模块为例,介绍其各类数据通讯协议,并通过研究UBX协议的数据内容,经过数据解码,获取原始观测数据和星历数据,进行了定位性能测试分析。试验测试表明,连续30敏的单频卫星观测数据,10 km的基线长度下,水平定位精度可达到10 cm,高程精度优于20 cm。通过对节点检波器定位性能的测试探索,为未来物探生产开展无桩施工提供了一种技术途径。

Most of the node geophones in petroleum physical exploration production use U-blox chips for time synchronization in acquisition operations,but its positioning functions are not fully exploited.This paper takes U-blox EVK-M8 T module as an example,introduces its various data protocols,and conducts a positioning test analysis by studying the data content of the UBX protocol,and obtaining the raw observation data and ephemeris data after data decoding.The experimental test shows that,the horizontal positioning accuracy can reach 10 cm and the elevation accuracy is better than 20 cm under the baseline length of 10 km with 30 minutes’continuous raw observation data.through the test exploration of the positioning of the node geophone,it provides a technical idea for future geophysical exploration operation to carry out stakeless construction.