How to open, grab image, and close 6 pcs of USB camera one by one by LabVIEW

[hangang]

Dear All,

I have a project, and want to use Labview to program it. The project need 6 USB cameras to grab images, but it is strange that the Labview cannot open cameras stably, if I use cameras with 300K pixies solution or up, even if the program open, close these cameras one by one. Normally, the program wait a while and display "timeout"!!

Please help! Urgent! Otherwise it will be another failed case to attempt implementing LabVIEW.

Thanks!

Bill Han

[zou]

Test in MAX first.

Increase expose time.

I did 2 cameras, 640x480, early this year.  Camera link, not USB.

[hangang]

2个相机的连接跟我的情况很不一样，因为即使是2个USB相机也可以很好工作。但是如果是6个USB相机情况就完全变了，特别奇怪的是，即使我一台一台地打开、图像采集、关闭相机，也不能稳定工作。这是LabVIEW本身的问题吗？

我不知道GigaE的方案可以支持多少相机，可能6台没有问题，但是成本就是USB相机的几倍了。

所以，请各位高手帮忙分析一下问题！

谢谢！

[lizhuo_lin]

应该是USB的带宽不够，我弄过8个USB相机，加USB扩展卡试试。

GigE Vision也是取决于带宽。