Title:
圧力検出器及び圧力検出器の詰まり診断方法
Document Type and Number:
Japanese Patent JP4804798
Kind Code:
B2
Abstract:
A pressure detector for detecting a high side pressure from a high pressure side impulse line and a low side pressure from a low pressure side impulse line includes a high side pressure variance calculating section for calculating a high side pressure variance from a high side pressure fluctuation calculated from a high side pressure signal, a low side pressure variance calculating section for calculating a low side pressure variance from a low side pressure fluctuation calculated from a low side pressure signal, a rate calculating section for calculating a variable according to a ratio of the high side pressure variance to the low side pressure variance, and a determining section for determining blockage of the high pressure side impulse line or blockage of the low pressure side impulse line based on a value of the variable.
Inventors:
Hashizume Takumi
Takuya Wakui
Miyachi Nobuo
Takuya Wakui
Miyachi Nobuo
Application Number:
JP2005154914A
Publication Date:
November 02, 2011
Filing Date:
May 27, 2005
Export Citation:
Assignee:
Yokogawa Electric Corporation
Hashizume Takumi
Takuya Wakui
Hashizume Takumi
Takuya Wakui
International Classes:
G01L13/00; G01L27/00
Domestic Patent References:
| JP2004132817A | ||||
| JP2005274501A | ||||
| JP64010141A | ||||
| JP60186725A |