| 摘要 |
PROBLEM TO BE SOLVED: To provide a weighing apparatus capable of surely performing zero-point correction, even with small intervals of putting articles to a weighing conveyer and keeping stable and high weighing accuracy. SOLUTION: The weighing instrument includes an input detecting sensor 15 for detecting an article P put into a conveyance part 10, a weighing device 20 for weighing the article P detected by the sensor 15, together with the conveyance part 10 for outputting a weighing signal; a signal processing means 33 for filtering a high frequency component from the weighing signal, respectively by a first filter 31 and a second filter 32 with filtering characteristics different from each other, a weight calculating means 35 for calculating a weighed value based on the weighing signal filtered by the first filter 31, and a zero-setting means 37 and a filter-setting part 40 for calculating and correcting a zero point that serves as a reference for the weighed value, based on the weighing signal filtered by one of the filters 31 and 32, in response to the detection state of the sensor 15. COPYRIGHT: (C)2008,JPO&INPIT
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