Articles
A proposal of the optimal sampling interval for shock pulse measurement
Article number
1396_43
Pages
315 – 320
Language
English
Abstract
Shock and vibration are important hazards in handling and transport that cause physical damage to products or their packages.
For the analysis of transport vibration, Nyquist frequency is widely used as an indicator for selecting measurement frequency or sampling rate.
However, little is known about the analysis method of the shock pulse in the physical distribution.
Therefore, we propose a method that effectively obtains the optimal sampling interval in terms of peak acceleration (PAcc) and velocity change (VC). For this purpose, we generated three types of shock pulse to test the efficiency of the analysis method: half-sine, triangular, and combination of half-sine and triangular.
For each shock pulse, we calculated the expected relative value (ERV) of PAcc and Vv for each sampling interval.
The sampling intervals to obtain equal or more than 90% of the original values were less than 20 or 30% of the pulse duration for PAcc or VC, respectively.
Therefore, it was concluded that the optimal sampling interval was 20% of the pulse duration.
The results help to reconsider/design the sampling interval of a simple shock logger and to optimize shock measurement in the physical distribution of postharvest products.
For the analysis of transport vibration, Nyquist frequency is widely used as an indicator for selecting measurement frequency or sampling rate.
However, little is known about the analysis method of the shock pulse in the physical distribution.
Therefore, we propose a method that effectively obtains the optimal sampling interval in terms of peak acceleration (PAcc) and velocity change (VC). For this purpose, we generated three types of shock pulse to test the efficiency of the analysis method: half-sine, triangular, and combination of half-sine and triangular.
For each shock pulse, we calculated the expected relative value (ERV) of PAcc and Vv for each sampling interval.
The sampling intervals to obtain equal or more than 90% of the original values were less than 20 or 30% of the pulse duration for PAcc or VC, respectively.
Therefore, it was concluded that the optimal sampling interval was 20% of the pulse duration.
The results help to reconsider/design the sampling interval of a simple shock logger and to optimize shock measurement in the physical distribution of postharvest products.
Authors
N. Kotobuki, T. Shirato, D. Ciptaningtyas, N. Benyakart, H. Umehara, H. Kitazawa, T. Watanabe, M. Thammawong, T. Shiina
Keywords
cushioning, fresh products, packaging, physical damage, shock
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