海底环境参数采集电路的硬件实现及其驱动软件设计

Circuit Drivers Design and Hardware Realization of Acquiring Seafloor Environment

海底大地电磁探测与陆上同类探测的技术差别之一是其测量过程受环境因素的影响较大.为真实地获取海底岩石介质的电性模型,在对海底大地电磁实测信号进行数据处理的同时,需参考海底仪器的方位朝向、倾斜姿态等信息,以便认识海底电磁场真实的矢量变化方向,进而实现对整个测网多站位的统一资料解释.为达到这一目的,海底大地电磁仪内部设有环境参数采集通道,该通道对诸如方位、倾斜、温度等信息实施分时循环采集.电路包括PC104嵌入式计算机、多路选择开关、逻辑控制门阵列等硬件单元.在硬件架构搭建完成后,开发出相配套的电路驱动软件,实现对海底环境参数的实时记录与存储.近期的海洋试验效果显示,所研制的电路硬件及其驱动软件已达到设计要求.

Seafloor magnetolluric detection is greatly influenced by environmental factor, which is different from onshore similar survey technology. To get the genuine seafloor rock medium electrical model, data processing about seafloor magnetolluric raw signal requires information such as seafloor instrument bearing orientation, obliquity, and temperature, by which the real vector change bearing of seafloor magnetolluric fields can be acquired, and then the uniform explanation about the whole survey of multi-station is obtained. To achieve this objective, the seafloor magnetolluric instrument must be equipped with the environmental parameter acquisition channel. The channel acquires many environmental parameters time-sharing circularly, such as orientation, obliquity, temperature and so on; the circuit consists of embedded computer PC104, multiplexers, logical control gate array and other hardware units. After completing the whole hardware architecture, the circuit driver is developed to record and save seafloor environmental parameters in real-time mode. Ocean recent test results indicate that the circuit hardware and driver software have been developed to meet the design requirements.