Strong Field Data Collection System In The Electromagnetic Field Under Study

The data acquisition system with effective and reliable anti-electromagnetic ability in the strong electromagnetic field was designed based on the electromagnetic emission analysis of electromagnetic interferences. The data acquisition system used S3C2440 as the core processor, LTC2297 as the ADC, and used the real-time operating systemμC/OS-Ⅱas the software platform. The synchronization of a dual-channel data acquisition was achieved by fully using the high-speed processing power of ARM9 microprocessor. The multi-task operation and real-time storage were achieved by transplanting theμC/OS-Ⅱoperating system to the ARM9 microprocessor. The design of hardware included the input protection circuit, signal conditioning circuits, analog-digital conversion circuits, Ethernet circuits and trigger circuits. Optical fiber technology was applied to the trigger circuit and Ethernet optical signal transmission circuit which improve the ability of anti-jamming effectively. Debugging of the hardware system, the transplantation and test ofμC/OS-Ⅱoperating system, the programming of application software and implementation of hardware drivers had been described in detail.The acquisition of the signal has been done by the data acquisition system. Theoretical analysis and practical debugging proved that the system design is feasible and has strong anti-interference ability of strong electromagnetic fields.