Discrimination of Moving Status for Logistic Tracking Systems Using Mahalanobis Distance of Acceleration Record
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作者:
Kawasaki, Satoshi
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Univ Tokyo, Grad Sch Frontier Sci, 5-1-5 Kashiwanoha, Chiba 2778563, JapanUniv Tokyo, Grad Sch Frontier Sci, 5-1-5 Kashiwanoha, Chiba 2778563, Japan
Kawasaki, Satoshi
[1
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Yoshida, Hiroshi
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Univ Tokyo, Grad Sch Frontier Sci, 5-1-5 Kashiwanoha, Chiba 2778563, JapanUniv Tokyo, Grad Sch Frontier Sci, 5-1-5 Kashiwanoha, Chiba 2778563, Japan
Yoshida, Hiroshi
[1
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Hosaka, Hiroshi
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Univ Tokyo, Grad Sch Frontier Sci, 5-1-5 Kashiwanoha, Chiba 2778563, JapanUniv Tokyo, Grad Sch Frontier Sci, 5-1-5 Kashiwanoha, Chiba 2778563, Japan
Hosaka, Hiroshi
[1
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Kawahara, Yasuhiro
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Kobe Univ, Grad Sch Syst Informat, Kobe, Hyogo 657, JapanUniv Tokyo, Grad Sch Frontier Sci, 5-1-5 Kashiwanoha, Chiba 2778563, Japan
Kawahara, Yasuhiro
[2
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机构:
[1] Univ Tokyo, Grad Sch Frontier Sci, 5-1-5 Kashiwanoha, Chiba 2778563, Japan
[2] Kobe Univ, Grad Sch Syst Informat, Kobe, Hyogo 657, Japan
An algorithm that judges the moving or staying statuses of distribution equipment by continuous measurement of the vibration is developed to realize a low-cost and power-saving logistic positioning systems. First, the measured acceleration levels are divided into two groups using tentative threshold level. Then, the threshold level is updated repeatedly using Mahalanobis distances of two groups to minimize the probability of discrimination error. Also an approximate formulas for the threshold to reduce computation amount is presented. Finally, to confirm the effectiveness of this method, the discrimination accuracy was evaluated using the simulation and actually measured data of an automobile.