| 发明名称 | Determining a time period a person is in bed | ||
| 摘要 | A method and wireless sensor device for determining a time period a person is in bed. In one aspect, a method includes utilizing a wireless sensor device to obtain a plurality of acceleration samples in relation to at least one axis associated with a person's body over a predetermined time window. The method also includes calculating a polar angle for each acceleration sample within the predetermined time window. The method also includes calculating a fraction of an amount of time within the predetermined time window that the polar angle is greater than an angle threshold that indicates that the person is lying down, where if the fraction is greater than a predetermined threshold, the predetermined time window is marked as a period the person is lying down. | ||
| 申请公布号 | US9471541(B1) | 申请公布日期 | 2016.10.18 |
| 申请号 | US201313941387 | 申请日期 | 2013.07.12 |
| 申请人 | Vital Connect, Inc. | 发明人 | Chan Alexander;Narasimhan Ravi |
| 分类号 | G04F13/04;G07C1/00;A61B5/00;A61B5/11;G01P15/00;G01D21/00;G06F17/40;G06F19/00;G06F17/00 | 主分类号 | G04F13/04 |
| 代理机构 | Brundidge & Stanger, P.C. | 代理人 | Brundidge & Stanger, P.C. |
| 主权项 | 1. A computer-implemented method for determining a time period a person is in bed, the method comprising: utilizing a wireless sensor device to obtain a plurality of acceleration samples in relation to at least one axis associated with a person's body over a predetermined time window; calculating a polar angle for each acceleration sample within the predetermined time window; and calculating a fraction of an amount of time within the predetermined time window that the polar angle is greater than an angle threshold that indicates that the person is lying down, wherein if the fraction is greater than a predetermined angle threshold, the predetermined time window is marked as a period the person is lying down. | ||
| 地址 | Campbell CA US | ||