一个usb传了两个通道的数据。如何用visa区分开这两个通道

[songyu]

一个usb传了两个通道的数据。如何用visa读取这两个通道的数据。并用波形显示。

[ian_fung]

Through what device (i.e. DAQ card) the two (2) channels' data were acquired?

There should be some (LabVIEW) drivers for reading the data. For the case of DAQ card, DAQmx drivers are used.

[songyu]

我usb的驱动用的NI-Visa usb，单通道调通了，双通道没有思路。应该怎样编啊。

[fangzhou]

你的硬件产品是不是NI的数据采集卡？

[songyu]

不是，

[songyu]

有办法解决吗？

[fangzhou]

NI VISA对于第三方的板卡应该是没办法支持物理通道对应到任务的功能的。

假设你的两个通道是ch0和ch1,你是怎么通过 VISA来选择单通道的？

[ian_fung]

I supposed there is hardware that does the acquisition... Since it is not NI's DAQ card(s), would you mind telling us what hardware are you using to acquire the data?

Each acquisition hardware, regardless of maker, should come with, or at least having, drivers that complete the communication between PC and itself. In the worst case, it should, at least, have communication protocol and commands set for reference.

Please check with the hardware maker for it's (LabVIEW) drivers, if any.

[songyu]

我做的单通道的visa读过来了，用NI VISA生成的usb驱动，两个通道还不知道能不能行，所以我想问问。能不能实现两个通道传输。

[fangzhou]

有没有详细一点的资料？比如板卡是哪个公司的，什么型号的，有没有编程手册？

如果你要的是在同一个时间采两个通道的信号，我感觉这个取决于硬件板卡，不是取决于VISA。LabVIEW程序可以做到的是先采集一个通道的信号，再采集另外一个通道的信号，把两个通道的波形显示在一个Graph里面是没有问题的。