Gas sensor
AssigneeAac Acoustic Technologies (Shenzhen) Co., Ltd.
InventorJinyu Zhang
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a gas sensor including a shell with a receiving cavity, an acoustic sensor, a partition plate and a flexible film accommodated in the receiving cavity. The partition plate and the flexible film jointly divide the receiving cavity into a first cavity and a second cavity, the first cavity is a sealed cavity formed by the joint enclosure of the flexible film, the partition plate, the side wall and the substrate. The acoustic sensor is located in the first cavity, the infrared transmitter is located in the second cavity. Compared with the related art, the gas sensor disclosed by the present disclosure could improve the sensitivity of the product.
Claims8
A gas sensor, including:
- a shell with a receiving cavity, comprising a cover, a substrate spaced apart from the cover, and a side wall located between the cover and the substrate, the cover, the substrate, and the side wall jointly enclosing to form the receiving cavity, and
- an infrared transmitter, an acoustic sensor, a partition plate and a flexible film accommodated in the receiving cavity, wherein
- the partition plate is connected with the substrate and the side wall, the flexible film is located between the cover and the side wall, the flexible film covers the side wall and the partition plate, the partition plate and the flexible film jointly divide the receiving cavity into a first cavity and a second cavity, the first cavity is a sealed cavity formed by the joint enclosure of the flexible film, the partition plate, the side wall and the substrate, the acoustic sensor is located in the first cavity, the infrared transmitter is located in the second cavity, the shell comprises a vent hole communicating with the outside and the second cavity, the flexible film, the first cavity and the second cavity form a resonant system, an intrinsic frequency of the resonant system is the same as a modulation frequency of the infrared transmitter.
Dependencies are inferred from the claim text.