Recent research has focused on the risks associated with poor sitting posture and the impact of sitting on biological parameters, such as heart rate because prolonged sitting is common across all ages and professions. In this work, we propose a novel approach that can display simultaneously posture and heart rate in real-time. In this device, pressure sensors are embedded into a flexible separate cushion easily put on any chair to provide sitting behaviours and a smartwatch-like PPG module is worn on the user's wrist. Regarding posture classification, pressure figures of ten pressure sensors under the seat bottom are inputs of four machine learning models, giving a high accuracy of 99 per cent. Besides, the Electrocardiography recording module is illustrated with the same results as a commercial device called DFRobot. Another advantage of this smart chair is that it not only simultaneously displays both sitting postures and heart rates on external devices like laptops, mobile phones, or televisions through microcontrollers but also offers the relationship between them to help people adjust their sitting behaviours, avoiding influencing heart rate. The smart chair is expected to be useful equipment for people with a sedentary lifestyle, especially office workers.

翻译：近期研究重点关注不良坐姿带来的风险以及久坐对心率等生理参数的影响，因为长时间坐姿在各年龄段和职业群体中都极为普遍。本研究提出一种能够实时同步显示坐姿与心率的新型监测方案。该装置将压力传感器嵌入可灵活拆卸的独立坐垫中，可适配各类座椅以采集坐姿行为数据，同时采用类似智能手表的PPG模块佩戴于用户腕部进行监测。在坐姿分类方面，以座椅底部十个压力传感器的压力分布图作为四种机器学习模型的输入，实现了高达99%的分类准确率。此外，该系统的电信号记录模块经测试与DFRobot商用设备具有同等测量精度。本智能座椅的另一优势在于：不仅可通过微控制器将坐姿与心率数据同步显示于笔记本电脑、手机或电视等外部设备，还能揭示两者间的关联性，帮助使用者调整坐姿习惯以避免对心率产生不良影响。该智能座椅有望成为久坐人群（特别是办公室工作者）的有效健康监护设备。