IC670ALG330
IC670ALG330
IC670ALG330
IC670ALG330
首先考虑测试系统的一是价格要低,二是可用性要强。将电路板的信号源做了一些处理,信号输出范围变成标准信号输出。
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《 :2479261344》
《邮箱:2479261344@.com》被测电路板的信号输出情况,电压信号有13路其中3路5V电压6路26V电压相同,频率信号有8路其中7路的频率相同。采集部分采用一块8通道12位30KS/S ISA多功能卡A8111和一块2通道的I-7080D计数模块来完成信号采集功能。充分利用A8111上的16路数字输出继电器的开关功能,让Ad2、Ad6、Tc2三个通道通过输出继电器的开关轮流接通Level2-4、Level8-13、K2-8。
测试原理图如下:
3、组态软件功能简介
①组态软件与采集卡和模块通过I/O Server实时通讯交互数据,当电路板准备就绪后,按动一下开始检测按钮开始检测。当系统接受到测试指示后,经过组态软件循环脚本程序的处理,让Ad2、Ad6、Tc2三个通道通过输出继电器的开关轮流接通Level2-4、Level8-13、K2-8。将Ad2、Ad6、Tc2三个需要轮流测量的通道同时轮流,每一个点的轮流时间可以控制在0.5秒,最多的7个点循环3.5秒,这样一整个测试周期就可以用不到10秒的时间完成,将被测线路板的各类电压值和频率值分别显示在软件当中,达到功能测试目的。所有采集到的数值都有一相对应的标准值,对应的采集到的数据与标准值进行比较,如所有数值都在他相对应的标准值的范围内,就报告通过显示“PASS”,再做下一张板测试,如果有个别参数有误,会在相应的参数后面提示“ERROR”,便于工作人没进对相应的错误做处理。每次将测试结果保存到软件的内置数据表(二维表)当中,便于以后统计管理。
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