Foreign substance detection device and foreign substance detection method
US11402313B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2017 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Nov 21, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/1493
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A foreign substance detection device includes a flow path unit through which a fluid is flown; an optical system configured to flatten a laser light from a laser source to be lengthened in a direction intersecting with a flow direction of the fluid; a laser light irradiation unit provided such that an optical path intersects with the flow direction and configured to irradiate the laser light into the flow path unit; a light detection unit which is provided on the optical path having passed through the flow path unit and includes light receiving elements arranged in a lengthwise direction of a transversal cross section of the optical path; a foreign substance detection unit configured to compare a signal level corresponding to intensity of light received by each light receiving element with a threshold value and configured to detect the foreign substance based on a comparison result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.