列车发电车监测仪的设计

the Design of the Monitoring System of Electrifying Coach of Train

讨论了列车发电车监测仪的设计。监测仪主要完成发电车电参数的监测,其采集的电参数有发电车3个机组中每个机组的3个电压、3个电流、频率、有功和无功功率,设计中要采集的参数比较多,如采用A/D来采集,硬件和软件上都比较复杂。系统中采用了3片电能计量芯片SA9904B对这些电参数进行测量,即满足了系统要求,又简化了硬件和软件的设计。实验证明,这种方法是可行的,数据精度高,稳定性好。

The thesis focus on the designof the monitoring system of electrifying coach of train. The items to be sampled are 3 phases voltage, 3 phases current, frequency and power If A/D converters are used to sample these items, it is a hard work. But 3 chips of energy calculation ICs with SIP interface are used, the monitoring system is simpled and reliable.