watchHAR: A Smartwatch IMU dataset for Activities of Daily Living

<pre># watchHAR: A Smartwatch IMU dataset for Activities of Daily Living This is a dataset of IMU recordings (3-axial acceleration, 3-axial gyroscope, and 3-axial magnetometer) recorded with Sony Smartwatch 3, along with ground truth location data from a vicon motion capture system. Smartwatch IMU and vicon location data exist for the users' left and right hands, as well as vicon location data from their left and right ankles. The recoded data cover the following `activity_id`s: * `brushing_teeth` * `idle` * `preparing_sandwich` * `reading_book` * `typing` * `using_phone` * `using_remote_control` * `walking_freely` * `walking_holding_a_tray` * `walking_with_handbag` * `walking_with_hands_in_pockets` * `walking_with_object_underarm` * `washing_face_and_hands` * `washing_mug` * `washing_plate` * `writing`, all of which were recorded in the same room, across the span of several days. In addition to these activities, walking stairs up and down (`activity_id`s `stairs_up` and `stairs_down`) events were recorded in various different locations. Note that for these stairs events only Smartwatch IMU recordings exist, and only from the dominant hand of the participants, which coincided with the right hand in all cases. The data are organised in the following folder structure: `user_id/activity_id/recording_type.csv`. Stair events are a special case in that multiple up/down stair recordings can exist for a single user. These are separated like the following example ``` `user_01/stairs_down-02/smartwatch_right_hand.csv` ``` that points to the IMU data of the second `stairs_down` recording of the first user. Finally, note that all timestamps refer to a UTC timezone, and that data collection took place in the United Kingdom. </pre># watchHAR：面向日常活动识别的智能手表惯性测量单元（Inertial Measurement Unit, IMU）数据集 本数据集包含通过索尼Smartwatch 3采集的惯性测量单元记录数据（含3轴加速度计、3轴陀螺仪及3轴磁力计数据），同时配套来自Vicon动作捕捉系统的地面真值位置数据。智能手表IMU数据与Vicon位置数据覆盖受试者的左右手，此外Vicon还采集了受试者左右脚踝的位置数据。 本次记录的数据包含以下活动ID（activity_id）： * `brushing_teeth`：刷牙 * `idle`：空闲状态 * `preparing_sandwich`：制作三明治 * `reading_book`：阅读书籍 * `typing`：打字 * `using_phone`：使用手机 * `using_remote_control`：使用遥控器 * `walking_freely`：自由行走 * `walking_holding_a_tray`：端托盘行走 * `walking_with_handbag`：拎手提包行走 * `walking_with_hands_in_pockets`：手插口袋行走 * `walking_with_object_underarm`：腋下夹物行走 * `washing_face_and_hands`：洗脸洗手 * `washing_mug`：清洗马克杯 * `washing_plate`：清洗餐盘 * `writing`：书写 所有上述活动均在同一房间内采集，数据采集历时数日完成。 除上述活动外，上下楼梯活动（活动ID分别为`stairs_up`与`stairs_down`）在多个不同地点完成采集。请注意，仅针对此类楼梯活动，仅采集了受试者利手（所有受试者的利手均为右手）佩戴的智能手表的IMU数据。 数据集采用如下文件夹组织结构：`user_id/activity_id/recording_type.csv`。楼梯活动为特殊类别，单个受试者可包含多组上下楼梯录制数据。此类数据的命名示例如下：`user_01/stairs_down-02/smartwatch_right_hand.csv`，该路径指向受试者1的第2次下楼梯录制的右手智能手表IMU数据。 最后请注意，所有时间戳均采用UTC时区，数据采集工作在英国完成。