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Radio frequency identification device (RFID)-based device and method for measuring rotation speed

A technology of rotating speed and rotating surface, applied in the field of radio frequency identification, can solve problems such as implementation difficulties, and achieve the effects of convenient application, increased measurement distance, and good anti-noise performance.

Inactive Publication Date: 2014-11-12
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The above measurement methods are difficult to implement when the measured object is required to be in a confined space and the measuring device must be far away from the measured object.

Method used

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  • Radio frequency identification device (RFID)-based device and method for measuring rotation speed

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Embodiment Construction

[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-writer 1 , a reader-writer antenna 2 , a linearly polarized label 3 , and a measured object 4 .

[0027] The RFID reader-writer 1 adopts the RFID communication protocol EPC Radio-Frequency Identity Protocols Class-1Generation-2 (hereinafter referred to as EPC C1GEN2). RFID reader 1 has the function of reading and writing tag data, the carrier frequency of the transmitter is 915Mhz, and the power is 21dbm; and the receiver has IQ demodulation and AD sampling module, which is responsible for reading and writing timing control and data acquisition processing, and controls the tag to return The signal is ASK modulated

[0028] The reader-writer antenna 2 has circular polarization characteristics. The main beam direction of the reader-writer antenna 2 is perpendic...

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Abstract

The invention discloses a radio frequency identification device (RFID)-based device and a method for measuring rotation speed. The RFID-based device and the method for measuring rotation speed comprises a RFID reader, a linear polarized tag which is used with the RFID reader and a reader antenna, wherein the linear polarized tag is attached to an object to be measured and synchronously rotates with the object to be measured. The RFID reader sends out signals through the reader antenna, the linear polarized tag returns the signals, the RFID reader does the operation after receiving the signals, and the rotation speed is obtained. By means of the RFID-based device and the method for measuring the rotation speed, the rotation speed measurement in contact-less closed environment is achieved, the transmitting power of a card reader is improved, long-distance rotation speed measurement can be achieved, the implementation is easy, and the previous protocol not need to be changed.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification, in particular to an RFID-based rotational speed measurement device and method. Background technique [0002] In recent years, the Internet of Things technology has developed rapidly. "Smart Earth" has built a blueprint for the future intelligent world. Radio Frequency Identification (RFID) is one of the most critical technologies in the Internet of Things. Compared with the traditional barcode, it has the characteristics of waterproof, antimagnetic, high temperature resistance, large reading distance, data encryption, larger storage data capacity, and simple change of stored information. Due to these unique advantages of radio frequency identification technology, it will be a future trend to use RFID technology to realize the identification of various information of objects. At present, the main applications are book management, logistics management, access control system, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/481
Inventor 赖晓铮谢泽明刘云梁
Owner SOUTH CHINA UNIV OF TECH
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