Title:
エンジンにおける混合ガスの混合状態解析方法
Document Type and Number:
Japanese Patent JP7328912
Kind Code:
B2
Abstract:
To provide a method which can continuously analyze a state of an air-fuel mixture with high accuracy regardless of variation in intensity of a laser beam when analyzing the state of the air-fuel mixture in, for example, a cylinder by an LIF method.SOLUTION: An analyzer comprises: a cylinder 4 made of a transparent material as a measurement object (image capture object); a laser emitter 2 which emits a laser beam to the cylinder 4; a camera 3 which captures an image of the cylinder 4; and a reference member 18 which is located in the vicinity of the cylinder 4. The laser beam is emitted to the reference member 18 also. Images of the cylinder 4 and the reference member 18 are simultaneously captured by the camera 3. The reference member 18 emits light with brightness proportional to an intensity of the laser beam. Therefore, brightness of the image of the reference member 18 varies as the intensity of the laser beam varies. Brightness of the image of the cylinder 4 is corrected up or down in accordance with this variation to achieve a state resulting from performing many measurements with the same intensity of the laser beam. Thus, many captured images can be accurately compared to improve analysis accuracy.SELECTED DRAWING: Figure 1
Inventors:
Yuta Shima
Kousuke Kusama
Kousuke Kusama
Application Number:
JP2020015062A
Publication Date:
August 17, 2023
Filing Date:
January 31, 2020
Export Citation:
Assignee:
Daihatsu Motor Co., Ltd.
International Classes:
G01N21/64; G01N33/22
Domestic Patent References:
| JP2009002811A | ||||
| JP11094828A | ||||
| JP49091391U | ||||
| JP2010019562A | ||||
| JP2007170934A | ||||
| JP2008197116A | ||||
| JP2012220472A |
Attorney, Agent or Firm:
Hiroyuki Nishi
Ryuichi Watanabe
Ryuichi Watanabe