基于TMS320F2812的移频轨道电路测试仪设计

为了在线检测移频轨道电路信号参数,确保列车行车安全,设计了基于TMS320F2812专用数字信号处理器的移频轨道电路测试仪;该设计充分利用TMS320F2812数据处理速度快、内部集成资源丰富的特点,结构简洁,性能可靠,有效地提高了数据处理能力和处理速度;采用欠采样技术和快速傅立叶变换(FFT)解调算法,使仪器测量的频率分辨率有很大提高,保证了测量的精准度;并从硬件电路和软件设计上采取措施,提高了移频轨道电路测试仪的抗干扰性;设计通过试验,达到了预定的设计研究目标。

Design of Detector for Frequency-Shift Track Signal Based on TMS320F2812

In order to detect the frequency-shift track signal on-line and insure the safety of the steering train,design of the detector for frequency-shift track signal based on the TMS320F2812 is presented.The design make use of characteristics of the TMS320F2812,data processing speed quick and internal integration resources rich,the structure is simple and direct,the function is credibility,raised the data processing ability and processing speed.Because the technique of undersampling and the FFT demodulation arithmetic are adopted,the fre- quency resolution of the instrument diagraph is raised very greatly.For improving the capability of anti-jamming,some measures are taken in the design of hardware and software.The research of detector shows that the scheduled targets are achieved.