深海取样岩心填充率自动监测系统研制及应用

Development and application of automatic monitoring system for core filling rate in deep‑sea coring

岩心填充率自动监测系统的研制是用以填补取心过程中缺少取心状态监测的不足。岩心填充率自动监测系统由主控制器、预留温度压力监测模块、霍尔传感器模块、数据储存模块、串口调试模块组成,其中实现取心状态监测的原理是基于霍尔效应。该系统可监测的取心速度范围为:0~30 mm/s,监测精度约为1%,系统选用STM32系列单片机、大容量存储器、高速USB接口等器件或模块,具备在线调试、编程、升级功能。采用研制的样机进行了海上试验,结果表明该系统可在水深3000 m的环境下(0~35 MPa的孔底压力)自动监测岩心贯入岩心管的过程,可为深海取样现场取样器类型的选择和取样器工作参数优化提供理论指导,具有广阔的应用前景。

The development of automatic monitoring system for core filling rate is to fill the shortage of core condition monitoring in the coring process.The automatic monitoring system is composed of main controller,reserved temperature and pressure monitoring module,Hall sensor module,data storage module and serial debugging module.Among whcih,the principle of core status monitoring is based on Hall effect.The coring speed range of the system can be monitored in 0~30 mm/s,and the monitoring accuracy is about 1%.The system uses STM32 single⁃chip microcomputer,large⁃capacity memory,high⁃speed USB interface and so on,which has the functions of online debugging,programming and upgrading.The sea tests were made,and the results show that the system can automatically monitor the process of core penetration into the core tube at a water depth of 3000m(a hole bottom pressure of 0~35MPa),which can provide theoretical guidance for the selection of field sampler type and the optimization of working parameters of the sampler,and has a broad application prospect.