Technologies and techniques of location and navigation are advancing, allowing greater precision in locating people in complex and challenging conditions. These advances have attracted growing interest from the scientific community in using indoor positioning systems (IPSs) with a higher degree of precision and fast delivery time, for groups of people such as the visually impaired, to some extent improving their quality of life. Much research brings together various works that deal with the physical and logical approaches of IPSs to give the reader a more general view of the models. These surveys, however, need to be continuously revisited to update the literature on the features described. This paper presents an expansion of the range of technologies and methodologies for assisting the visually impaired in previous works, providing readers and researchers with a more recent version of what was done and the advantages and disadvantages of each approach to guide reviews and discussions about these topics. Finally, we discuss a series of considerations and future trends for the construction of indoor navigation and location systems for the visually impaired.

中文翻译：

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视障者室内导航系统的技术综述。

定位和导航的技术不断发展，可以在复杂而富挑战性的条件下更精确地定位人员。这些进步吸引了科学界越来越多的兴趣，他们需要使用具有更高精确度和更快交货时间的室内定位系统（IPS），以使视障人士等群体在一定程度上改善他们的生活质量。许多研究将涉及IPS的物理和逻辑方法的各种著作汇总在一起，以使读者对模型有更全面的了解。但是，需要不断地重新研究这些调查，以更新有关所描述功能的文献。本文介绍了用于辅助先前工作中的视觉障碍者的技术和方法范围的扩展，为读者和研究人员提供了最新版本的内容以及每种方法的优缺点，以指导有关这些主题的评论和讨论。最后，我们讨论了针对视障者的室内导航和定位系统构建的一系列注意事项和未来趋势。