Supplementary Material: Low-Cost Wearable Dive Computer for Monitoring, Logging and Presentation of Large-scale Freediving Studies

Due to the enormous spread and acceptance of wearables, it has become easier in recent years to collect physical data and use it to improve the living conditions of the wearer. On the other hand, there is the underwater world, in which technological development could not progress so quickly; mainly because the sealing of the device and the interaction with it, pose different and novel problems compared to more widespread wearables. To close this gap, a low-cost dive computer with a customizable set of sensors which is suitable for large-scale data collection for divers is presented in this contribution. This prototype makes use of existing electronic components such as sensors or modules aimed to develop a fully functional and low-cost portable system. In addition, the portable system is also able to store the data of all users bundled on a server for further research. These results cover two primary goals: (1) to provide an easily reproducible portable system at low cost, and (2) to collect data in an easily adaptable platform and its subsequent easy accessibility. Finally, the prototype was built based on the instructions and tested under real conditions.

近年来，随着可穿戴设备（wearables）的大规模普及与广泛应用，采集人体体征数据并利用其改善佩戴者生活状态已愈发便捷。反观水下领域，其技术发展速度却未能同步提升，究其原因主要在于：相较于应用更为广泛的可穿戴设备，水下设备的密封防护以及人机交互环节均面临诸多全新且独特的技术难题。为填补这一技术空白，本文提出一款低成本潜水电脑（dive computer），其搭载可定制化传感器套件，适用于开展面向潜水员的大规模数据采集工作。该原型机采用现有传感器、模组等电子元器件搭建，旨在打造一款功能完备且成本低廉的便携式系统。此外，该便携式系统还可将所有用户的采集数据集中存储至服务器，以供后续研究使用。本研究达成两项核心目标：其一，构建一套低成本且易于复现的便携式系统；其二，依托适配性强的采集平台完成数据收集，并确保后续数据获取便捷高效。最后，本研究依据设计方案完成原型机搭建，并在真实水下环境中开展了测试验证。