| 摘要 |
PROBLEM TO BE SOLVED: To compensate accurately a creep error which is included in a weight signal. SOLUTION: The weight signal Wx(t) includes a creep error wx(t). The creep error wx(t) includes each element of a creep ratio K(θ) and a time constant T(θ) which is changed by temperatureθof a weight sensor. The weight signal Wx(t) is processed by a control element 50 as an estimation means. By using this processing, the creep error wx(t) is estimated. The changing part of the creep coefficient K(θ) and the time constant T(θ) due to the change in the temperatureθis compensated. A control element 52 as a subtraction means subtracts an estimated creep error wc(t) after the processing by the control element 50 from the weight signal Wx(t). As a result of this procedure, the creep error wx(t) which is included in the weight signal Wx(t) is compensated for. COPYRIGHT: (C)2005,JPO&NCIPI
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