室內定位系統中的低耗電邊界偵測方法METHOD OF REDUCING POWER CONSUMPTION OF A RADIO BADGE IN A BOUNDARY DETECTION LOCALIZATION SYSTEM

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

12/427,908

專利證號

US 8,130,103 B2

專利獲證名稱

室內定位系統中的低耗電邊界偵測方法METHOD OF REDUCING POWER CONSUMPTION OF A RADIO BADGE IN A BOUNDARY DETECTION LOCALIZATION SYSTEM

專利所屬機關 (申請機關)

國立臺灣大學

獲證日期

2012/03/06

技術說明

一種室內定位系統中的低耗電邊界偵測方法，適用於偵測一攜帶一識別器之待追蹤對象是否抵達一邊界。該方法包含下列步驟：當一設於該識別器之加速度計所偵測到的該識別器之一速度不為零時，根據一過去取樣時間區間之最近二次定位資訊，計算一平均速度等於該識別器於該過去取樣時間區間之行進距離除以該過去取樣時間區間；接著，計算一預估時間區間等於最近一次取樣位置與該邊界之距離除以該平均速度；然後經過該預估時間區間後，進行下一次定位。 An energy-efficient boundary detection method for an indoor localization system is disclosed. The method comprises: if the velocity of a badge detected by an accelerometer incorporated with the badge is not zero, calculating an average velocity as the traveling distance of the badge during the past sampling time interval divided by the past sampling time interval according to the two mostly recent positioning data; calculating a estimated time interval as the distance between the mostly recent sampling position and the boundary divided by the average velocity; and proceeding with the next positioning after the estimated time interval.

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