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修改时间 04-12-2015 09:36 PM
选择函数和 布尔型条件结构 都可以用来进行 2个程序分支之间的切换 但是执行效果为什么不一样 。
我做了个测试,波形图表1一是用选择函数切换2种波的产生,生产的图像很连续。而波形图表2我用布尔型 条件结构切换2种波的产生,产生的图像就断断续续。 不解这是为什么?
修改时间 05-25-2015 02:01 AM
你好,选择函数中正弦波形和方波波形两个子VI每时每刻都是运行的,在进行切换时,数据可以做到无缝衔接;而布尔型条件结构中每时每刻只有一个子VI运行,在进行切换的瞬间,新VI的即使输出为空数据,所以会显得有断层。比如说当条件结构运行在方波波形状态,当切换至正弦波形时,切换的那一瞬间,正弦波形没有运行没有输出,图表中显示断层,随着正弦波形一点点的输出信号,波形图表中信号会一点点的出现直至满屏。
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