US5773828A
Expired / Lapsed
US
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Gas analyzer
Assignee: Horiba Ltd
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Filing: 1996-02-23
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Granted: 1998-06-30
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Expires: 2016-02-23
Abstract
Abstract A gas analyzer has a simple composition and can measure multi-components at a high accuracy. A plurality of measuring cells, including a case where the cells are different in length from each other, communicate sequentially with each other through a communication part to form a single gas path. A cut-on filter as an infrared penetration/reflection means for diffracting spectrally an infrared wavelength is provided on a light source side. A NO X measuring cell 3 having a cell length of about 60 mm and a CO 2 measuring cell 7 having a cell length of about 1 mm which communicate through the communication part with each other, and a capacitor microphone (an infrared-ray detector for NO X ) and a pyroelectric detector (an infrared-ray detector for CO 2 ) are provided on the infrared penetration and reflection sides of the optical filter.
Inventors
- 👤 Shigeyuki Akiyama
- 👤 Masahiko Fujiwara
- 👤 Takuji Oida
- 👤 Naohito Shimizu
- 👤 Aritoshi Yoneda
- 👤 Toshikazu Ohnishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:00
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/3504; G01N21/59; G01N21/61
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
114 words
A gas analyzer comprising: a light source; at least one infrared penetration/reflection means provided immediately adjacent to the light source and having an infrared penetration side and an infrared reflection side; a plurality of measuring cells communicating sequentially with each other to form a single gas path; and a plurality of infrared-ray detectors; at least one set of one of the measuring cells and one of the infrared-ray detectors being provided immediately adjacent to the infrared penetration side of the infrared penetration/reflection means, and at least one set of one of the measuring cells and one of the infrared-ray detectors being provided immediately adjacent to the infrared reflection side of the infrared penetration/reflection means.
Claim 2
Dependent Claim
114 words
A gas analyzer comprising: a light source; at least one infrared penetration/reflection means provided immediately adjacent to the light source and having an infrared penetration side and an infrared reflection side; a plurality of measuring cells communicating sequentially with each other to form a single gas path; and a plurality of infrared-ray detectors; at least one set of one of the measuring cells and one of the infrared-ray detectors being provided immediately adjacent to the infrared penetration side of the infrared penetration/reflection means, and at least one set of one of the measuring cells and one of the infrared-ray detectors being provided immediately adjacent to the infrared reflection side of the infrared penetration/reflection means.
Claim 3
Dependent Claim
25 words
The gas analyzer as set forth in claim 1 wherein: each of the measuring cells has a cell length different from the other measuring cells.
Claim 4
Dependent Claim
167 words
A gas analyzer comprising: a light source; a first infrared penetration/reflection means provided adjacent to the light source and having an infrared penetration side and an infrared reflection side; a plurality of measuring cells communicating sequentially with each other to form a single gas path; a plurality of infrared-ray detectors, at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared penetration side of the first infrared penetration/reflection means, and at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the first infrared penetration/reflection means; and a second infrared penetration/reflection means having an infrared reflection side and an infrared penetration side provided between one of the measuring cells and the infrared-ray detector corresponding thereto; one of the infrared-ray detectors being provided on the infrared reflection side of the second infrared penetration/reflection means for detecting infrared rays reflected by the second infrared penetration/reflection means.
Claim 5
Dependent Claim
167 words
A gas analyzer comprising: a light source; a first infrared penetration/reflection means provided adjacent to the light source and having an infrared penetration side and an infrared reflection side; a plurality of measuring cells communicating sequentially with each other to form a single gas path; a plurality of infrared-ray detectors, at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared penetration side of the first infrared penetration/reflection means, and at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the first infrared penetration/reflection means; and a second infrared penetration/reflection means having an infrared reflection side and an infrared penetration side provided between one of the measuring cells and the infrared-ray detector corresponding thereto; one of the infrared-ray detectors being provided on the infrared reflection side of the second infrared penetration/reflection means for detecting infrared rays reflected by the second infrared penetration/reflection means.
Claim 6
Dependent Claim
47 words
The gas analyzer as set forth in claim 3 wherein: one of the measuring cells is provided between the infrared reflection side of the second infrared penetration/reflection means and the infrared-ray detector provided on the same side, and is in communication with the plurality of measuring cells.
Claim 7
Dependent Claim
183 words
A gas analyzer comprising: a light source; a first infrared penetration/reflection means provided adjacent to the light source and having an infrared penetration side and an infrared reflection side; a plurality of measuring cells communicating sequentially with each other to form a single gas path; a plurality of infrared-ray detectors, at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared penetration side of the first infrared penetration/reflection means, and at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the first infrared penetration/reflection means; and a second infrared penetration/reflection means having an infrared reflection side and an infrared penetration side and being provided between the infrared penetration side of the first infrared penetration/reflection means and the set of one of the measuring cells and one of the infrared-ray detectors; at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the second infrared penetration/reflection means.
Claim 8
Dependent Claim
183 words
A gas analyzer comprising: a light source; a first infrared penetration/reflection means provided adjacent to the light source and having an infrared penetration side and an infrared reflection side; a plurality of measuring cells communicating sequentially with each other to form a single gas path; a plurality of infrared-ray detectors, at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared penetration side of the first infrared penetration/reflection means, and at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the first infrared penetration/reflection means; and a second infrared penetration/reflection means having an infrared reflection side and an infrared penetration side and being provided between the infrared penetration side of the first infrared penetration/reflection means and the set of one of the measuring cells and one of the infrared-ray detectors; at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the second infrared penetration/reflection means.
Claim 9
Dependent Claim
185 words
A gas analyzer comprising: a light source; a first infrared penetration/reflection means provided adjacent to the light source and having an infrared penetration side and an infrared reflection side: a plurality of measuring cells communicating sequentially with each other to form a single gas path; a plurality of infrared-ray detectors, at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared penetration side of the first infrared penetration/reflection means, and at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the first infrared penetration/reflection means; one of the measuring cells being provided between the light source and the infrared penetration/reflection means; and a second infrared penetration/reflection means having an infrared reflection side and an infrared penetration side and being connectedly provided on the infrared penetration side of the first infrared penetration/reflection means; at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the second infrared penetration/reflection means.
Claim 10
Dependent Claim
185 words
A gas analyzer comprising: a light source; a first infrared penetration/reflection means provided adjacent to the light source and having an infrared penetration side and an infrared reflection side: a plurality of measuring cells communicating sequentially with each other to form a single gas path; a plurality of infrared-ray detectors, at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared penetration side of the first infrared penetration/reflection means, and at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the first infrared penetration/reflection means; one of the measuring cells being provided between the light source and the infrared penetration/reflection means; and a second infrared penetration/reflection means having an infrared reflection side and an infrared penetration side and being connectedly provided on the infrared penetration side of the first infrared penetration/reflection means; at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the second infrared penetration/reflection means.
Claim 11
Dependent Claim
229 words
A gas analyzer comprising: a light source; a first infrared penetration/reflection means provided adjacent to the light source and having an infrared penetration side and an infrared reflection side; a plurality of measuring cells communicating sequentially with each other to form a single gas path; a plurality of infrared-ray detectors, at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared penetration side of the first infrared penetration/reflection means, and at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the first infrared penetration/reflection means; a second infrared penetration/reflection means having an infrared reflection side and an infrared penetration side and being provided between one of the measuring cells and the infrared-ray detector corresponding thereto; one of the infrared-ray detectors being provided on the infrared reflection side of the second infrared penetration/reflection means for detecting infrared rays reflected by the second infrared penetration/reflection means; and a third infrared penetration/reflection means having an infrared reflection side and an infrared penetration side and being provided between another one of the measuring cells and the infrared-ray detector corresponding thereto; one of the infrared-ray detectors being provided on the infrared reflection side of the third infrared penetration/reflection means for detecting infrared rays reflected by the third infrared penetration/reflection means.
Claim 12
Dependent Claim
229 words
A gas analyzer comprising: a light source; a first infrared penetration/reflection means provided adjacent to the light source and having an infrared penetration side and an infrared reflection side; a plurality of measuring cells communicating sequentially with each other to form a single gas path; a plurality of infrared-ray detectors, at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared penetration side of the first infrared penetration/reflection means, and at least one set of one of the measuring cells and one of the infrared-ray detectors being provided on the infrared reflection side of the first infrared penetration/reflection means; a second infrared penetration/reflection means having an infrared reflection side and an infrared penetration side and being provided between one of the measuring cells and the infrared-ray detector corresponding thereto; one of the infrared-ray detectors being provided on the infrared reflection side of the second infrared penetration/reflection means for detecting infrared rays reflected by the second infrared penetration/reflection means; and a third infrared penetration/reflection means having an infrared reflection side and an infrared penetration side and being provided between another one of the measuring cells and the infrared-ray detector corresponding thereto; one of the infrared-ray detectors being provided on the infrared reflection side of the third infrared penetration/reflection means for detecting infrared rays reflected by the third infrared penetration/reflection means.
Claim 13
Dependent Claim
167 words
A light-intermittent gas analyzer comprising: a light source; a light intermitter provided adjacent to the light source; a plurality of infrared penetration/reflection means each having an infrared penetration side and an infrared reflection side; a reference cell positioned between the light intermitter and a first infrared penetration/reflection means; a plurality of measuring cells communicating sequentially with each other to form a single gas path, a first measuring cell being provided on the infrared reflection side of the first infrared penetration/reflection means, and a second measuring cell being provided between the light intermitter and a second infrared penetration/reflection means and substantially parallel to the reference cell; a two-chamber light reception infrared-ray detector provided on the infrared penetration sides of the first and the second infrared penetration/reflection means; and a plurality of infrared-ray detectors, a first infrared-ray detector being provided on the infrared reflection side of the first infrared penetration/reflection means, and a second infrared-ray detector being provided on the infrared reflection side of the second infrared penetration/reflection means.
Claim 14
Dependent Claim
167 words
A light-intermittent gas analyzer comprising: a light source; a light intermitter provided adjacent to the light source; a plurality of infrared penetration/reflection means each having an infrared penetration side and an infrared reflection side; a reference cell positioned between the light intermitter and a first infrared penetration/reflection means; a plurality of measuring cells communicating sequentially with each other to form a single gas path, a first measuring cell being provided on the infrared reflection side of the first infrared penetration/reflection means, and a second measuring cell being provided between the light intermitter and a second infrared penetration/reflection means and substantially parallel to the reference cell; a two-chamber light reception infrared-ray detector provided on the infrared penetration sides of the first and the second infrared penetration/reflection means; and a plurality of infrared-ray detectors, a first infrared-ray detector being provided on the infrared reflection side of the first infrared penetration/reflection means, and a second infrared-ray detector being provided on the infrared reflection side of the second infrared penetration/reflection means.
Claim 15
Dependent Claim
69 words
The light-intermittent gas analyzer as set forth in claim 8 wherein: a third infrared penetration/reflection means is arranged between the second infrared penetration/reflection means and the second measuring cell; a third measuring cell communicating with the first measuring cell is arranged on the infrared reflection side of the third infrared penetration/reflection means; and a third infrared-ray detector is provided on the infrared reflection side of the third measuring cell.
Claim 16
Dependent Claim
94 words
The light-intermittent gas analyzer as set forth in claim 9 wherein: at least one pair of infrared penetration/reflection means are provided between said light intermitter and the reference cell; a second reference cell being provided on the infrared reflection side of the infrared penetration/reflection means; the first measuring cell and a third measuring cell communicating with the second measuring cell are provided on the infrared reflection side of the infrared penetration/reflection means; and a second two-chamber light reception type infrared-ray detector corresponding to the second reference cell and the third measuring cell is provided.
Claim 17
Dependent Claim
92 words
The light-intermittent gas analyzer as set forth in claim 8 wherein: at least one pair of infrared penetration/reflection means are provided between said light intermitter and the reference cell; a second reference cell is provided on the infrared reflection side of the infrared penetration/reflection means; the first measuring cell and a third measuring cell communicating with the second measuring cell being proved on the infrared reflection side of the infrared penetration/reflection means; and a second two-chamber light reception type infrared-ray detector corresponding to the second reference cell and the third measuring cell.
Claim 18
Dependent Claim
87 words
The light-intermittent gas analyzer as set forth in claim 8 wherein: a third infrared penetration/reflection means is arranged between the reference cell and the light intermitter; a fourth infrared penetration/reflection means is arranged between the second measuring cell and the light intermitter; a third infrared-ray detector and a third measuring cell are provided on the infrared reflection side of the third infrared penetration/reflection means; and a fourth infrared-ray detector and a fourth measuring cell are provided on the infrared reflection side of the fourth infrared penetration/reflection means.
Claim 19
Dependent Claim
39 words
The light-intermittent gas analyzer as set forth in claim 12 wherein: a fifth measuring cell in communication with the first measuring cell and a fifth infrared-ray detector are provided on the infrared refection side of the second penetration/reflection means.
Claim 20
Dependent Claim
67 words
The light-intermittent gas analyzer as set forth in claim 13 wherein at least one infrared penetration/reflection means is provided between the first measuring cell and the second penetration/reflection means; a measuring cell communication with the first measuring cell in combination with an infrared-ray detector are provided on the infrared refection side of each infrared penetration/reflection means provided between the first measuring cell and the second penetration/reflection means.
Claim 21
Dependent Claim
67 words
The light-intermittent gas analyzer as set forth in claim 12 wherein: at least one infrared penetration/reflection means is provided between the first measuring cell and the second penetration/reflection means; a measuring cell communication with the first measuring cell in combination with an infrared-ray detector are provided on the infrared refection side of each infrared penetration/reflection means provided between the first measuring cell and the second penetration/reflection means.
Claim 22
Dependent Claim
26 words
The light-intermittent gas analyzer as set forth in claim 8 wherein: each of the measuring cells has a cell length different from the other measuring cells.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-29 | 2001-12-29 | 2002-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-29 | 2005-12-29 | 2006-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-29 | 2009-12-29 | 2010-06-30 | $7700.00 | Window Closed / Lapsed |