Title:
液種識別方法及び液種識別装置
Document Type and Number:
Japanese Patent JP4038492
Kind Code:
B2
Abstract:
A liquid type identifying method and device for correctly and quickly determining whether or not a liquid is a predetermined one. An identifying sensor unit (2) so disposed as to face a flow passage (24) of a liquid to be measured has an indirect-heating liquid type detecting section (21) including a heater and a heat sensor and a liquid temperature sensing section (22). A single pulse voltage is applied to the heater of the liquid type detecting section to allow the heater to generate heat, and an identification calculation section makes an identification according to the output of the liquid type detecting circuit including the heat sensor of the liquid type detecting section and the liquid temperature sensing section. Identification is made by judging that the liquid to be measured is a predetermined one only when a liquid-type-corresponding first voltage corresponding to the difference between the initial temperature of the heat sensor at the heat generation of the heater and a first temperature after a first time passes from the start of the single pulse application and a liquid-type-corresponding second voltage corresponding to the difference between the initial temperature of the heat sensor and a second temperature after a second time longer than the first time passes from the start of the single pulse application lie in the respective predetermined ranges.
Inventors:
Kawanishi Toshiaki
Akiko Kubota
Kiyoshi Yamagishi
Akiko Kubota
Kiyoshi Yamagishi
Application Number:
JP2004159334A
Publication Date:
January 23, 2008
Filing Date:
May 28, 2004
Export Citation:
Assignee:
Mitsui Mining & Smelting Co., Ltd.
International Classes:
G01K7/00; G01N25/18; F01N3/20; F01N9/00; G01N27/04; G01N27/18; G01N33/28
Domestic Patent References:
| JP2005214856A |
Attorney, Agent or Firm:
Jyohei Yamashita