| 摘要 |
PROBLEM TO BE SOLVED: To provide a weighing apparatus capable of weighing with high measurement precision in dynamic balance of weight type filling machine. SOLUTION: The load cell 180 in the weighing device 18 generates weighing signal Wy[n] of electric voltage corresponding to the weight Wy[n] impressed on itself. The weighing signal Wy[n] is converted by an A/D converter circuit 184 into raw weighing data Wy[n], and inputted to the CPU 186. The CPU 186 is provided with the built-in response filter 188, and by the response filter 188, the raw weighing data Wy[n] is filter-processed following to a filter constant Cx[n]. After the filter process, the filtered weighing data Wy[n]' is sent to the controller 36. The filter constant Cx[n] of the response filter 188 is provided with the same time interval as the sampling interval Tc of the A/D conversion circuit 184, in other words, it is revised with further shorter time interval than the characteristic vibration interval of the load cell 180, consequently, high response can be obtained. COPYRIGHT: (C)2005,JPO&NCIPI
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