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CN-122016725-A - Composite detection device and sensor

CN122016725ACN 122016725 ACN122016725 ACN 122016725ACN-122016725-A

Abstract

The embodiment of the application provides a composite detection device and a sensor. The device comprises a shell, a controller, a first light source, a second light source, a first photoelectric converter, a second photoelectric converter, a third photoelectric converter and a plurality of reflectors, wherein the controller, the first light source, the second light source, the first photoelectric converter, the second photoelectric converter, the third photoelectric converter and the plurality of reflectors are arranged in the shell, the controller is respectively connected with the first light source, the second light source, the first photoelectric converter, the second photoelectric converter, the third photoelectric converter and the plurality of reflectors, the first light source, the second light source, the third photoelectric converter and the plurality of reflectors are arranged in the shell, the controller is respectively connected with the first light source, the second light source, the first photoelectric converter, the second photoelectric converter, the third photoelectric converter, the air inlet is arranged on the shell, a detection cavity is arranged in the shell, the first direction side of the detection cavity is provided with the first light source and the third photoelectric converter, the second light source and the first photoelectric converter, the plurality of reflectors are arranged on the second direction side of the detection cavity, the plurality of reflectors are respectively arranged on the third direction side of the detection cavity, and the third photoelectric converter are respectively arranged on the third direction side of the detection cavity. Therefore, the cost is reduced and the detection accuracy and performance are improved while the small cavity is maintained.

Inventors

  • HUANG LIDA
  • CHEN TAO
  • CHEN YANG
  • XIAO XIAO
  • LI KAIYUAN
  • LIU WEISI
  • YANG BEI

Assignees

  • 清华大学
  • 清华大学合肥公共安全研究院

Dates

Publication Date
20260512
Application Date
20260202

Claims (10)

  1. 1. A composite detection device is characterized by comprising a shell, a controller, a first light source, a second light source, a first photoelectric converter, a second photoelectric converter, a third photoelectric converter and a plurality of reflectors, wherein the controller, the first light source, the second light source, the first photoelectric converter, the second photoelectric converter, the third photoelectric converter and the reflectors are all arranged in the shell, the controller is respectively connected with the first light source, the second light source, the first photoelectric converter, the second photoelectric converter and the third photoelectric converter, The shell is provided with an air inlet, and a detection cavity is arranged in the shell, wherein the detection cavity is used for receiving gas to be detected; The first direction side of the detection cavity is provided with the first light source and the third photoelectric converter, and the second direction side of the detection cavity is provided with the second light source and the first photoelectric converter; The plurality of reflectors are respectively arranged at the third direction side and the fourth direction side of the detection cavity, the second photoelectric converter is arranged at the fifth direction side of the detection cavity, The first direction side is opposite to the third direction side, the second direction side is opposite to the fourth direction side, and the fifth direction side is located at a preset angle of the detection cavity.
  2. 2. The composite detection device of claim 1, wherein the controller is configured to control the first light source and the second light source to emit a first light beam and a second light beam, respectively, toward the detection chamber; The plurality of reflectors are used for respectively reflecting the first light beam and the second light beam so as to enable the reflected first light beam to pass through the detection cavity to enter the first photoelectric converter and enable the reflected second light beam to pass through the detection cavity to enter the third photoelectric converter; The second photoelectric converter is used for respectively receiving scattered light beams corresponding to the first light beam and the second light beam scattered by the gas to be detected.
  3. 3. The composite detection device of claim 2, wherein the plurality of mirrors comprises a first mirror and a second mirror, the first mirror disposed on a third directional side of the detection chamber, the second mirror disposed on a fourth directional side of the detection chamber, wherein the third directional side is orthogonal to the fourth directional side, and the first directional side and the second directional side are orthogonal to each other.
  4. 4. The composite detection device according to claim 2, further comprising a driving module and a conversion module, wherein the first light source and the second light source are connected to the controller through the driving module, respectively, and the first photoelectric converter, the second photoelectric converter, and the third photoelectric converter are connected to the controller through the conversion module, respectively.
  5. 5. The composite detection device according to claim 2, wherein a dust screen is provided at the air inlet.
  6. 6. The composite detection device of claim 2, further comprising a function and alarm module, the function and alarm module being coupled to the controller, wherein the function and alarm module comprises a mute button, a reset button, a status indicator, and an alarm device.
  7. 7. The composite detection device according to claim 2, wherein the controller is specifically configured to; acquiring a preset light source control strategy; And controlling the first light source and the second light source to alternately output the first light beam and the second light beam according to the preset light source control strategy, wherein the wavelength of the first light beam is a first preset wavelength, the wavelength of the second light beam is a second preset wavelength, and the first preset wavelength is larger than the second preset wavelength.
  8. 8. The composite detection device of claim 4, wherein the first photoelectric converter is configured to convert the reflected first light beam into a first electrical signal; the third photoelectric converter is used for converting the reflected second light beam into a second electric signal; The second photoelectric converter is configured to convert a scattered light beam corresponding to the first light beam into a first scattered electrical signal, and convert a scattered light beam corresponding to the second light beam into a second scattered electrical signal.
  9. 9. The composite detection device of claim 8, wherein the controller is further configured to; And generating a detection result of the gas to be detected according to the first electric signal, the second electric signal, the first scattering electric signal and the second scattering electric signal, wherein the detection result comprises methane concentration and smoke concentration.
  10. 10. A sensor comprising a composite detection device according to any one of claims 1 to 9.

Description

Composite detection device and sensor Technical Field The application relates to the technical field of gas detection, in particular to a composite detection device and a sensor. Background In recent years, building fires and gas explosion accidents frequently occur, and smoke and methane are respectively used as early products of fires and typical combustible gases, so that accurate detection of the smoke and the methane has become an urgent need in the field of public safety. The traditional scheme generally adopts independent smoke alarm and methane alarm to be installed separately, and has the advantages of complex system, high cost, large maintenance amount and difficult popularization in resident kitchens, catering places and industrial workshops with limited space. Aiming at the composite detection requirement, the prior art mainly adopts two schemes, namely, a mature smoke detector and a methane detector are simply stacked on the same shell, an independent air chamber, an optical path and an algorithm are reserved, only rear-end data fusion alarm is carried out, and a plurality of independent detectors are integrated on a system layer to uniformly analyze data. The former has the advantages of doubling elements, difficult optical axis calibration, large volume and high power consumption, and the latter has the advantages of high construction cost, complex wiring, large maintenance amount and strong dependence on independent detectors. Therefore, the existing composite detector has the problems of high cost, complex structure, slow response, high false alarm rate and the like. Disclosure of Invention The present application aims to solve at least one of the technical problems in the related art to some extent. Therefore, a first object of the present application is to provide a composite detection device, which can obtain a long optical path absorption signal and a fixed angle scattering signal synchronously while maintaining a small cavity by reasonably arranging each component, so as to achieve the technical effects of compact structure, reduced cost and improved detection performance. A second object of the application is to propose a sensor. In order to achieve the above purpose, the first aspect of the present application provides a composite detection device, which comprises a housing, a controller, a first light source, a second light source, a first photoelectric converter, a second photoelectric converter, a third photoelectric converter and a plurality of reflectors, wherein the controller, the first light source, the second light source, the first photoelectric converter, the second photoelectric converter, the third photoelectric converter and the reflectors are all arranged in the housing, the controller is respectively connected with the first light source, the second light source, the first photoelectric converter, the second photoelectric converter and the third photoelectric converter, a gas inlet is arranged on the housing, a detection cavity is arranged in the housing, the detection cavity is used for receiving gas to be detected, the first direction side of the detection cavity is provided with the first light source and the third photoelectric converter, the second direction side of the detection cavity is provided with the second light source and the first photoelectric converter, the reflectors are respectively arranged on the third direction side and the fourth direction side of the detection cavity, the second photoelectric converter is arranged on the fifth direction side of the detection cavity, the third direction side is opposite to the fifth direction side, and the fourth direction side is opposite to the fifth direction side. In addition, the composite detecting device according to the above embodiment of the present application may further have the following additional technical features: According to one embodiment of the application, the controller is used for controlling the first light source and the second light source to emit the first light beam and the second light beam to the detection cavity respectively, the plurality of reflectors are used for reflecting the first light beam and the second light beam respectively so as to enable the reflected first light beam to pass through the detection cavity to enter the first photoelectric converter and enable the reflected second light beam to pass through the detection cavity to enter the third photoelectric converter, and the second photoelectric converter is used for receiving scattered light beams corresponding to the first light beam and the second light beam scattered by the gas to be detected respectively. According to one embodiment of the application, the plurality of mirrors comprises a first mirror and a second mirror, the first mirror being arranged on a third directional side of the detection chamber, the second mirror being arranged on a fourth directional side of the detection chamber, wherein the third