【摘要】 以双TMS320F2812为采样及数据处理核心,设计了实时通用式机车信号检测系统。通过感应线圈收集轨道信号并经调理后输出,应用采样DSP的内部A/D模块采样,通过SPI传输到数据处理核心芯片,应用欠采样定理对信号进行处理后进行FFT变换实现键控移频信号解调及相应频谱分析得到编码规则及相关行车指令。系统采用双机备份设计保证可靠性。经实际应用证明:该系统在强电磁干扰较环境中能稳定运行,系统具有较高的频谱分辨率及实时性。更多还原

【Abstract】 Based on the double TMS320F2812(F2812) as the collecting and data process core,a general real-time locomotive signal detection system was designed and implemented.The signal was collected by induce cycle and output by transacted,then sampled by the A/D module in collecting DSP.The further signal was transferred to data process core through SPI,signal was processed by sub-nyquist sampling then FFT to implement the demodulation and acquire the driving demand.Dual-system was applied to improve the reliability.Approved by real application,the system can run stably in strong distribution environment,and has high frequency resolution and real-time operation.更多还原