Depends on where the speed test is used. If the production line speed is measured (equivalent to testing production efficiency or capacity), place a label on the processed items and swipe the card at each station last night. If it is used to measure the speed of a car, just fix the RFID to a position that is proportional to the tire speed, then install a card reader, read the card every time it rotates, and then calculate it (haha, we have a patent , it is inconvenient to go into too much detail).