Abstract
Radio frequency identification (RFID) has shown its potential in human–machine interaction thanks to its inherent function of identification and relevant physical information of signals, but complex data processing and undesirable input accuracy restrict its application and promotion in practical use. This paper proposes a novel finger-controlled passive RFID tag design for human–machine interaction. The tag antenna is based on a dipole antenna with a separated T-match structure, which is able to adjust the state of the tag by the press of a finger. The state of the proposed tag can be recognized directly by the code received by the RFID reader, and no complex data processing is needed. Since the code is hardly affected by surroundings, the proposed tag is suitable to be used as a wireless switch or control button in multiple scenarios. Moreover, arrays of the proposed tag with rational tag arrangements could contribute to a series of manual control devices, such as a wireless keyboard, a remote controller, and a wireless gamepad, without batteries. A 3 × 4 array of the finger-controlled tag is presented to constitute a simple passive RFID keyboard as an example of the applications of the proposed tag array and it refers to the arrangement of a keypad and can achieve precise, convenient, quick, and practical commands and text input into machines by pressing the tags with fingers. Simulations and measurements of the proposed tag and tag array have been carried out to validate their performances in human–machine interaction.
Highlights
Human–machine interaction (HMI) is a process of inputting and outputting information through a human–machine interface, which is a key point of the HMI to achieve the mutual communication, establish the mutual platform between users and machines, and realize the operation on the machines [1].The most common human–machine interfaces usually involve traditional devices, such as the keyboard and mouse
We propose a novel finger-controlled ultra-high frequency (UHF) Radio frequency identification (RFID) tag design for HMI
This paper proposed a novel passive UHF RFID tag, as well as a tag array, for human–machine interaction
Summary
Human–machine interaction (HMI) is a process of inputting and outputting information through a human–machine interface, which is a key point of the HMI to achieve the mutual communication, establish the mutual platform between users and machines, and realize the operation on the machines [1].The most common human–machine interfaces usually involve traditional devices, such as the keyboard and mouse. Human–machine interaction (HMI) is a process of inputting and outputting information through a human–machine interface, which is a key point of the HMI to achieve the mutual communication, establish the mutual platform between users and machines, and realize the operation on the machines [1]. With the development of recognition technologies, the interaction modes between human and machine have become more diversified, such as vision interaction, voice interaction, and motion interaction [2], and new human–machine interface devices have emerged for these interaction modes. Limitations of high cost, low scalability, limited input accuracy, and need of batteries [7] restrict their large-scale. In the few years, traditional devices constructed to emphasize the transmission of explicit messages [8] will still be the mainstream of human–machine interface devices
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