axivity-ax6-left-forearm-nondominant-v2

6-axis actigraphy (translation and rotation) using Axivity AX6 (similar to AX3 used in UK BioBank), configured with 100Hz sampling frequency, 16bit resolution and 2000dps gyro/rotation. <br> Attached with a velcro to the interior of a cotton wrist band with arrow facing down towards the ground/back when arms are in a natural position along the body, on the left forearm (non-dominant arm). <br> Started acquisition in mid-March 2022 up to March 2023. <br> The difference with the v1 (first year) acquisition is that the device is now worn INSIDE the cotton wrist band, instead of outside, to be more robust against detachment during motion in day-to-day activities, especially outdoors. Hence, the light sensor and ambient temperature sensor should be considered unusuable. <br> Each file represents one acquisition session of about 1 week. Multiple files can be concatenated to study a longer time period.

本数据集采用Axivity AX6型6轴活动记录仪（6-axis actigraphy）采集，该设备与英国生物银行（UK BioBank）中使用的AX3设备类似，配置参数为100Hz采样率、16位分辨率，以及2000°/s的陀螺仪旋转量程。
设备通过魔术贴固定于棉质腕带内侧，佩戴于左前臂（非利手手臂）；当手臂自然垂于身体两侧时，设备箭头朝下指向地面/背部。
采集周期为2022年3月中旬至2023年3月。
与首版（v1，首年采集）方案的差异在于，本次采集将设备佩戴于棉质腕带内侧而非外侧，以提升日常活动（尤其户外场景）中运动时的抗脱落稳定性。因此，设备内置的光线传感器与环境温度传感器视为不可使用。
每个文件对应单次约1周的采集会话，可通过拼接多个文件以研究更长时间跨度的数据集。