Circuit Drivers Design and Hardware Realization of Acquiring Seafloor Environment

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.