Current situation of vibration tactile coding

In recent years, with the progress and development of science and technology, the research on artificial intelligence and wearable devices continues to develop, and researchers increasingly find ways to provide a kind of more comfortable and comprehensive user experience. Auditory and visual technologies have been fully developed and utilized, while as an emerging field, tactile sense is a research direction with great potential. As a type of unique human sensory channel, tactile sense has unique advantages. It can convey information about maximum joints in physiological structure of human body, such as hardness, texture, shape, size, and temperature, which cannot be transmitted by visual and auditory senses. Additionally, the tactile sense is fast and accurate, thus, it performs well in some special situations, such as supergravity scenarios, high-speed rotating scenarios, or very noisy environments. The design of vibrational tactile coding is an important way to develop tactile devices and achieve a better human computer interaction. Haptic coding has several defects. It is used in narrow application scenes and conveys unclear meaning. Compared with the mature development of vision and hearing, it is necessary to further design the vibration haptic coding patterns to overcome these defects. Research on information transmission of tactile sense is very meaningful, for example, it offers convenience for special groups such as people with visual impairment or workers engaged in their education. It provides a navigation service for visually impaired people by changing the vibration frequency and vibration intensity of a blind vest. When hearing or vision is impaired, the tactile sense is a considerate way to provide timely and accurate information assistance to the special groups. Besides, tactile sense can help express the flight attitude information in virtue of combined vibration tactile coding. However, these studies aimed at providing a set of specific coding for a specific scenario in which relatively vague pieces of information were conveyed, such as emotion and direction Based on these studies, designing a set of universal coding patterns for most usage scenarios to deliver exact and accessible information is essential. This paper discussed the resolution of tactile vibration based on the mechanism of tactile vibration perception. According to the application of directional navigation and text interaction, the vibration information coding was summarized and the experimental methods and conclusions of vibration information coding were introduced. Moreover, the prospect of the vibration information coding field was proposed.