公开(公告)号：US20030215100A1

公开(公告)日：2003-11-20

申请号：US10436075

申请日：2003-05-13

Applicant: Ishida Co., Ltd.

Inventor： Takashi Kimura ,  Masayoshi Nakajima ,  Shuuji Murata ,  Yukio Wakasa ,  Kazuhiro Suhara

IPC: A61F011/06 ,  G10K011/16 ,  H03B029/00

CPC classification number: H03H17/025 ,  G01G3/147 ,  G01G23/10 ,  H03H17/0294

Abstract: A noise canceling apparatus (1) comprises an amplifier (10) for amplifying a measured signal (ms) outputted from a measuring device (3), an analog filter (11), an ADC (12), a digital filter (14), a coefficient control section (13), and a data input section (15). The digital filter (14) is a notch filter for attenuating a frequency component of a quantitative signal D(n) outputted from the ADC (12) at a plurality of notches (stop bands). A transfer function of the digital filter (14) is expressed by the product of a plurality of factors each having a root that corresponds to each one of the plurality of notches. The coefficient control section (13) changes a frequency component of a root corresponding to a notch selected from the plurality of notches, and thereafter, expands in a polynomial the transfer function of the reconstructed digital filter (14). On the basis of the polynomial thereby obtained, a new series of filter coefficients is calculated. A filter characteristic is controlled in such a manner that it conforms to a frequency variation of a fixed-period vibration noise, whereby the fixed-period vibration noise that varies in frequency is attenuated with a high degree of precision.

Abstract translation: 噪声消除装置（1）包括用于放大从测量装置（3）输出的测量信号（ms）的放大器（10），模拟滤波器（11），ADC（12），数字滤波器（14）， 系数控制部（13）和数据输入部（15）。 数字滤波器（14）是用于衰减在多个凹口（停止频带）处从ADC（12）输出的定量信号D（n）的频率分量的陷波滤波器。 数字滤波器（14）的传递函数由多个因子的乘积表示，每个因子各自具有与多个凹口中的每一个相对应的根。 系数控制部（13）改变与从多个切口中选择的切口对应的根的频率分量，然后以多项式扩大重构的数字滤波器（14）的传递函数。 根据得到的多项式，计算出一系列新的滤波器系数。 控制滤波器特性使其符合固定周期振动噪声的频率变化，由此频率变化的固定周期振动噪声以高精度衰减。

公开(公告)号：US20040088342A1

公开(公告)日：2004-05-06

申请号：US10693973

申请日：2003-10-28

Applicant: Ishida Co., Ltd

Inventor： Naoyuki Aikawa ,  Tohru Morichi ,  Yukio Wakasa

IPC: G06F017/10

CPC classification number: H03H17/0294 ,  G01G3/147

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.

Abstract translation: 提供了一种滤波技术，其可以容易地适当地消除噪声，而不增加滤波处理所需的电路的规模，即使噪声频率易于改变。 权重测量装置的滤波器系数计算器（6）使用预定的算术表达式计算滤波器系数，并将其输出到信号处理器（5）。 信号处理器（5）使用滤波器系数对称重信号（Ds）进行滤波处理。 算术表达式包括指定必须局部增强衰减的衰减频带的频带位置的参数。 用户可以通过数据输入部分（7）输入参数的值。 以这种方式，可以通过使用指定物理的并因此容易掌握的衰减频带的频带位置的参数来改变滤波器系数。 因此，可以容易地移动衰减频带，从而可以容易且适当地消除噪声。

公开(公告)号：US20020139203A1

公开(公告)日：2002-10-03

申请号：US10058966

申请日：2002-01-30

Applicant: ISHIDA, CO., LTD.

Inventor： Yukiko Chimura ,  Yukio Wakasa

IPC: G01L001/04

CPC classification number: G01L1/2243 ,  G01G3/1412

Abstract: A load cell 1 includes a strain body 2, a bridge circuit and a coating film 10. The bridge circuit is formed of a strain gauge 7 arranged on the strain body 2. The coating film 10 is formed on the strain body 2, covers at least a portion of the strain body 2 attached to a member made of a metal material dissimilar to the strain body and a strain occurring portion of the strain body 2 except for a portion to be attached to the strain gauge 7, includes a coating layer made of resin having a glass transition temperature of 40null C. or more, and has an electrical insulating property.

Abstract translation: 测力传感器1包括应变体2，桥接电路和涂膜10.桥接电路由布置在应变体2上的应变仪7形成。涂膜10形成在应变体2上，覆盖在 附着到由与应变体不同的金属材料制成的构件的应变体2的至少一部分和除了要附着于应变计7的部分之外的应变体2的应变发生部分包括： 的玻璃化转变温度为40℃以上的树脂，具有电绝缘性。