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US-2024255427-A1 · Aug 1, 2024 · US
Photoacoustic detector with long term drift compensation
US8939006B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8939006-B2 |
| Application number | US-201113100998-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 4, 2011 |
| Priority date | May 4, 2011 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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A photoacoustic detector wherein control circuits compensate for long term variations of components therein including a light source and sensing microphones. The control circuits intermittently energize the source to evaluate changes in at least source resistance. The control circuits intermittently energize an acoustic generator to evaluate changes in one or more generator responsive microphones.
First claim
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The invention claimed is: 1. A photoacoustic detector comprising: a sensing chamber; a source which directs radiant energy into the chamber; at least one microphone, coupled to the chamber, to detect acoustic events therein; an acoustic generator coupled to the chamber; and control circuits coupled to the source, the acoustic generator and the at least one microphone, wherein the control circuits compensate for output loss from the source and changes in the at least one…
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- G01N21/1702Primary
Physics · mapped topic
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- What does patent US8939006B2 cover?
- A photoacoustic detector wherein control circuits compensate for long term variations of components therein including a light source and sensing microphones. The control circuits intermittently energize the source to evaluate changes in at least source resistance. The control circuits intermittently energize an acoustic generator to evaluate changes in one or more generator responsive microphones.
- Who is the assignee on this patent?
- Rezachek Thomas M, Shubinsky Gary P, Freeman Michael, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification G01N21/1702. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).