Differences between USB 3.0 and USB 2.0
Regular USB3.0 is different from USB 2.0
・Transfer speed：500MB/s
・Compatible or higher with USB2.0
・Maximum cable length 3ｍ
Only the basic parts are shown.
Of these, USB3 Vision was created as a “camera interface standard using USB3.0” that can be reliably used for commercial, industrial, and machine vision applications.
Computer Vision
Stability
・High-speed data transmission
・Transmit data accurately
・Stable recovery from error transmission state
Reliability (compared to connector)
・Check and verify accuracy
・Fix firmly to the outside part
Was created with a purpose
Has the function of resending packets when a transmission error (packet drop) occurs.
→This will virtually eliminate screen freezes that occur with USB2.0.).
If the image is saved “from camera → via CPU → memory”, it is called “camera → memory”.
→ Can reduce CPU load.
(Depending on the manufacturer, it is expressed differently, such as “direct memory access,” “no-copy mechanism,” or “DMA.”)
Furthermore, the connector is also used with a screw locking function
Compared to GigE cameras, stability and speed are quite similar.
It has the disadvantage of a maximum cable length of 3m, but recently machine vision cables using fiber optic cables have been introduced and they can be used in lengths of 10m or more.
Cameras that comply with this standard are marked with the USB3 Vision logo.
