Haptic feedback is integral to the improved experience of prosthetic users and the reduction in prosthesis rejection. Prior studies have explored various methods to encode tactile information and deliver vibration feedback. However, a comprehensive study comparing performance across different stimulation locations and feedback modalities for wearable devices is absent and there is no test platform. This paper proposes an open-source reconfigurable haptic feedback system which incorporates 25 sensors and wireless communication to allow customized number of vibration motors, adjustable motor placement, and programmable encoding of tactile data to change feedback modalities. To demonstrate potential studies that can be investigated using SensoPatch, we conducted two experiments: 1) to assess the vibration discrimination accuracy on 3 body parts 2) to assess the effect of 6 methods of mapping tactile data to varying number of motors on object manipulation. SensoPatch utilizes low-cost off-the-shelf components, enabling large-scale comparative studies of feedback modalities and stimulation sites to optimize vibrotactile feedback and facilitate its deployment in upper limb prostheses.

翻译：触觉反馈对于改善假肢使用者的体验和降低假肢弃用率至关重要。先前的研究已探索了多种编码触觉信息及传递振动反馈的方法。然而，目前缺乏针对可穿戴设备在不同刺激位置和反馈模态间性能的综合比较研究，也缺少相应的测试平台。本文提出了一种开源的可重构触觉反馈系统，该系统集成了25个传感器和无线通信功能，允许自定义振动电机数量、可调节电机布局，并可对触觉数据进行可编程编码以改变反馈模态。为展示利用SensoPatch可开展的潜在研究，我们进行了两项实验：1）评估在3个身体部位的振动辨别准确率；2）评估6种将触觉数据映射至不同数量电机的方法对物体操控的影响。SensoPatch采用低成本商用组件，能够支持反馈模态与刺激位置的大规模比较研究，以优化振动触觉反馈并促进其在上肢假肢中的部署。