Weight measurement apparatus, method of eliminating noise...

Details Weight measurement apparatus, method of eliminating noise... Weight measurement apparatus, method of eliminating noise...

2007-05-22

2007-05-22

Ngo, Chuong D. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S323000

Reexamination Certificate

active

10693973

ABSTRACT:
A filtering technique which makes it possible to easily and appropriately eliminate a noise without increasing a scale of a circuit necessary for a filtering process even if a noise frequency is liable to be changed is provided. A filter coefficient calculator (6) of a weight measurement apparatus calculates filter coefficients using a predetermined arithmetic expression and outputs them to a signal processor (5). The signal processor (5) carries out a filtering process on a weighing signal (Ds) using the filter coefficients. The arithmetic expression includes a parameter specifying a band position of an attenuation band where attenuation must be locally enhanced. A user can input a value of the parameter via a data entry part (7). In this manner, the filter coefficients can be changed by using a parameter specifying the band position of the attenuation band which is physical and thus easy to grasp. Accordingly, it is possible to easily move the attenuation band, and thus noise can be eliminated easily and appropriately.

REFERENCES:
patent: 4489391 (1984-12-01), Morikawa
patent: 5737254 (1998-04-01), Lane et al.
patent: 6404832 (2002-06-01), Abe
patent: 6-21814 (1987-12-01), None
Naoyuki Aikawa, et al. “Design for FIR Transmitter and Receiver Filters for Data Communication System” in Transaction of IEICE, Mar. 1996, vol. J79-A, No. 3, pp. 608-615.

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