Devices, systems, and methods for detecting odorants
US-2015377835-A1 · Dec 31, 2015 · US
Detection element and detection device
US2018266995A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018266995-A1 |
| Application number | US-201815922678-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 15, 2018 |
| Priority date | Mar 17, 2017 |
| Publication date | Sep 20, 2018 |
| Grant date | — |
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Abstract
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A gas detection element includes a crystal oscillator and a gas adsorption film formed on the crystal oscillator. The gas adsorption film has a thickness that causes the detection element to have a crystal impedance of no more than 10 times the crystal impedance of the crystal oscillator on which the gas adsorption film is not formed. A resonance frequency variation of the gas detection element due to humidity variation can be kept within a certain range.
First claim
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We/I claim: 1 . A gas detection element comprising: a crystal oscillator having an initial crystal impedance; and a gas adsorption film formed on the crystal oscillator wherein the gas adsorption film has a thickness that causes the gas detection element to have a crystal impedance of no more than 10 times the initial crystal impedance of the crystal oscillator on which the gas adsorption film is not formed. 2 . The gas detection element according to claim 1 , wherein the gas adsorption film has a substantially largest thickness in a range of film thicknesses that cause the detection element to have a crystal impedance of no more than 10 times the initial crystal impedance of the crystal oscillator on which the gas adsorption film is not formed. 3 . The gas detection element according to claim 1 , wherein the gas adsorption film has a thickness that cause the detection element to have a crystal impedance of at least 1.1 times the initial crystal impedance of the crystal oscillator on which the gas adsorption film is not formed. 4 . A gas detection device comprising: multiple gas detection elements, each having a crystal oscillator having an initial crystal impedance and a gas adsorption film which is provided on the crystal oscillator and which adsorbs a specific gas, wherein each gas detection element is such that its gas adsorption film has a thickness that causes the gas detection element to have a crystal impedance of no more than 10 times the initial crystal impedance of its crystal oscillator on which the gas adsorption film is not formed. 5 . The gas detection device according to claim 4 , further comprising: a humidity detection element and a correction computing unit that corrects a detection result from the gas detection element based on a detection result from the humidity detection element.
Assignees
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Classifications
Resonance or resonant frequency · CPC title
concerning the detector · CPC title
for determining moisture content · CPC title
Humidity, wetness · CPC title
Adsorption, desorption, surface mass change, e.g. on biosensors · CPC title
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- What does patent US2018266995A1 cover?
- A gas detection element includes a crystal oscillator and a gas adsorption film formed on the crystal oscillator. The gas adsorption film has a thickness that causes the detection element to have a crystal impedance of no more than 10 times the crystal impedance of the crystal oscillator on which the gas adsorption film is not formed. A resonance frequency variation of the gas detection element…
- Who is the assignee on this patent?
- Taiyo Yuden Kk
- What technology area does this patent fall under?
- Primary CPC classification G01N29/022. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Sep 20 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).