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Gas concentration detection device with double channels, detection method and alarm device

A gas concentration detection, dual-channel technology, which is applied in the field of alarm devices and gas concentration detection devices, can solve the problems of many detection interference factors, large detection optical path adjustment errors, low light energy intensity, etc., to eliminate the interference of reflection loss factors, eliminate Effect of power fluctuation and reduction of compensation error

Pending Publication Date: 2019-10-22
SHENZHEN NUOAN ENVIRONMENTAL & SAFETY INC
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  • Application Information

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Problems solved by technology

[0005] This method has complex receiving structure, large adjustment error of the detection optical path, and low light energy intensity, resulting in many detection interference factors and low detection accuracy of the alarm device.

Method used

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  • Gas concentration detection device with double channels, detection method and alarm device
  • Gas concentration detection device with double channels, detection method and alarm device
  • Gas concentration detection device with double channels, detection method and alarm device

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] In the prior art, pyroelectric materials are generally used as detectors, and specific optical filters are installed in front of the detectors. Due to the weak light energy, a single-channel pyroelectric detector with a large window is required to meet the requirements. In the prior art, a beam splitter is generally arranged in the emission light path, and the reflected light energy is sent to two single-channel detectors on average for detection. This...

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Abstract

The invention provides a gas concentration detection device with double channels, a detection method and an alarm device. The gas concentration detection device comprises a light source, a concave reflector and a double-channel detector; light emitted by the light source irradiates the concave reflector; the concave reflector converges and reflects the light to the double-channel detector; the dual-channel detector comprises a detection channel and a reference channel which are located on the same horizontal plane; the detection channel is used for detecting the first light intensity of firstwavelength light which has been absorbed by a gas; the reference channel is used for detecting the second light intensity of second wavelength light which is not absorbed by the gas; and the concentration of the gas is obtained through the first light intensity and the second light intensity. With the concave reflector adopted, the light intensity of the double-channel detector can be improved, and the sensitivity of the double-channel detector is further improved.

Description

technical field [0001] The invention relates to the technical field of gas concentration monitoring, in particular to a gas concentration detection device with two channels, a detection method and an alarm device. Background technique [0002] Infrared combustible gas monitoring and alarm devices have many advantages such as long life, good reliability, and high detection accuracy, so they are favored by users, especially in applications that require high life and reliability. [0003] Since the sampling method of the alarm device generally needs to adopt a diffuse structure, and the mid-to-far infrared spectrum is a line light source, it is difficult to collimate effectively. sensitivity. [0004] In the prior art, pyroelectric materials are generally used as detectors, and specific optical filters are installed in front of the detectors. Due to the weak light energy, a single-channel pyroelectric detector with a large window is required to meet the requirements. In the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504G01N21/25G01N21/03G01N21/01
CPCG01N21/3504G01N21/255G01N21/031G01N21/01G01N2021/0112G01N2021/0314Y02A50/20
Inventor 卿笃安
Owner SHENZHEN NUOAN ENVIRONMENTAL & SAFETY INC
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