Radio frequency identification device (RFID)-based device and method for measuring rotation speed
A speed measurement and rotating surface technology, applied in the field of radio frequency identification, can solve problems such as implementation difficulties, and achieve the effects of convenient application, good anti-noise performance, and increased measurement distance.
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[0025] The invention will be further described in detail below in conjunction with the accompanying drawings.
[0026] Such as figure 1 As shown, an RFID-based rotational speed measurement device includes an RFID reader 1, a reader antenna 2, a linearly polarized tag 3, and a measured object 4.
[0027] RFID reader 1, the RFID communication protocol adopted is EPC Radio-Frequency Identity Protocols Class-1Generation-2 (hereinafter referred to as EPC C1GEN2). RFID reader 1 has the function of tag data reading and writing processing, the transmitter carrier frequency is 915Mhz, power is 21dbm; and the receiver has IQ demodulation and AD sampling module, responsible for reading and writing timing control and data acquisition processing, and control the tag return The signal is ASK modulated
[0028] Reader antenna 2 has circular polarization characteristics. The main beam direction of reader antenna 2 is perpendicular to the rotating surface of the measured object. The distance d betw...
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