基于FPGA的便携式VI曲线航空电路板测试装置

Portable Aviation Circuit Board Test Device of VI Curve Based on FPGA

摘要:

目前对便携式VI曲线航空设备电路板测试装置的研究较少,不能满足外场环境下的应急测试需求。针对这一问题,提出了一种放置于手提式机箱中的便携式VI曲线电路板测试装置的设计方案,以FPGA为主控器件设计测试板件,以给定程序可调的激励信号、采集在各种激励信号下的电流信号、并把电压电流数据通过USB接口传送给上位机,上位机采用迷你工控机进行设计,在接收到电压电流数据后,进行数据处理并在显示屏上实时绘制相应的以电压电流为横纵坐标的图像信息。试验结果表明,针对不同类型的阻抗元件,装置可以绘制出相应类型的VI曲线,从而识别出元器件的不同状态。装置小巧轻便,操作简单,可以运用于外场机载电路板件的测试诊断。

Abstract:

At present, there is little research on the portable circuit board test device of VI (Voltage-Intensity) curve for aviation equipment, which can not meet the emergency test requirements in the field environment. In order to solve this problem, a design scheme of portable VI curve circuit board test device is proposed, which is placed in the portable case. FPGA(Field Programmable Gate Array) is used as the main control device to design the test board, the excitation signal that can be adjusted by given program, the current signal under various excitation signals is collected, and the voltage and current data are transmitted to the upper computer through USB interface. The upper computer adopts mini industrial control After receiving the data of voltage and current, the computer processes the data and draws the corresponding image information with voltage and current as the horizontal and vertical coordinates on the display screen in real time. The test results show that for different types of impedance components, the device can draw corresponding types of VI curves, so as to identify different states of components. The device is small, light and easy to operate. It can be used in the test and diagnosis of field airborne circuit board.