一种遥测系统中信号源的设计

Design of a Test System Signal Source

摘要:

在遥测系统中,信号源能否完全模拟测试系统所需信号是保证整个系统高可靠性的核心；设计以FPGA为控制芯片,通过PCI总线实现与上位机的通信,结合硬件和软件的综合设计完成了模拟信号、时间指令信号及可变频脉冲信号的稳定输出。经长期实验表明:模拟信号输出稳定,输出误差±30 mV,脉冲信号可按照要求准确输出不同频率、固定个数的脉冲,且系统数据传输速率可达到40 Mbps。

Abstract:

In the telemetry system, the core to ensure the high reliability of the system is whether sources can fully simulate the test system or not.FPGA is designed as the control chip, Communicate with the host computer via the PCI bus, The stable output of analog signals, time command signals, variable frequency pulse signals is completing by combining the integrated design of hardware and software. The long-term experiments proof:analog signals output stably. Output error is ±30 mV, pulse signals output pulses of different frequencies fixed numbers and accordancing with the requirementswith accurately, system data transfer rates up to 40 Mbps.