Non-contact rotating speed measurement system and method based on wireless network

The invention belongs to the technical field of rotating speed measurement, and provides a non-contact rotating speed measurement system and method based on a wireless network. The system comprises a COTS equipment transmitting end, a COTS equipment receiving end and a cloud server, the COTS equipment transmitting end and the COTS equipment receiving end are arranged in a room in a spaced manner; the COTS equipment transmitting end is used for transmitting a WiFi signal carrying CSI information, and the COTS equipment receiving end is used for receiving the CSI information containing object rotation characteristics and uploading the CSI information to the cloud server. According to the invention, accurate rotation speed measurement is realized by analyzing the influence of object rotation on CSI amplitude and phase and utilizing complementarity of the amplitude and phase in rotation perception. In addition, the problem of errors caused by vibration of a rotating object is solved, and a conjugate multiplicatio