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CN-122016781-A - Optical gas sensor and photodetector

CN122016781ACN 122016781 ACN122016781 ACN 122016781ACN-122016781-A

Abstract

The optical gas sensor provided by the application comprises a light detector and a circuit board, wherein the light detector comprises a light detection part, a light filtering part, an integrated circuit chip and a packaging part, and the integrated circuit chip is electrically connected with the light detection part. The optical gas sensor provided by the application comprises the optical detector, wherein the optical detector comprises the optical detection part and the integrated circuit chip capable of processing the electric signal, and the optical detection part and the integrated circuit chip are both positioned in the packaging part, so that the influence of the outside on the electric signal processing of the optical gas sensor is reduced. The application also provides a light detector capable of reducing the influence of the outside on the electric signal processing.

Inventors

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Assignees

  • 浙江三花智能控制股份有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (12)

  1. 1. An optical gas sensor comprising a light detector (100) and a circuit board (110), characterized in that the light detector (100) comprises: a light detection section (1), the light detection section (1) being capable of generating a physical quantity change under irradiation of light, the physical quantity change being capable of changing with a change in concentration of a gas to be measured, the physical quantity change being capable of being converted into an electrical signal; a light filtering part (2), wherein the light detecting part (1) is at least partially arranged in alignment with the light filtering part (2); An integrated circuit chip (3) electrically connected to the light detection section (1), the integrated circuit chip being capable of processing the electric signal, and And the packaging part (4), the light detection part (1) and the integrated circuit chip (3) are both positioned in the packaging part (4), and the light detection part (1) and the integrated circuit chip (3) are both electrically connected with the circuit board (110).
  2. 2. The optical gas sensor according to claim 1, wherein the package portion (4) comprises a connection portion (5), the light detection portion (1) and the integrated circuit chip (3) are electrically connected to the connection portion (5), respectively, the connection portion (5) is electrically connected to the circuit board (110); along the height direction of the photodetector (1000), the photodetector (1) and the integrated circuit chip (3) are positioned on the same side of the connection portion (5), and the photodetector (1) and the circuit board (110) are positioned on both sides of the connection portion (5), respectively.
  3. 3. Optical gas sensor according to claim 2, wherein the encapsulation (4) has a cavity (400), the light detection part (1) and the integrated circuit chip (3) are both located in the cavity (400), and the connection part (5) is a part of the wall of the cavity (400).
  4. 4. An optical gas sensor according to claim 2 or 3, characterized in that the light detecting section (1) and the integrated circuit chip (3) are located on the same side of the connection section (5) in the height direction of the light detector (100); The connecting part (5) comprises a first connecting part (51) and a second connecting part (52), the light detection part (1) is electrically connected with the first connecting part (51), the integrated circuit chip (3) is electrically connected with the second connecting part (52), the first connecting part (51) is positioned at one side of the second connecting part (52) along the direction perpendicular to the height direction of the light detector (100), and the light detection part (1) is positioned at one side of the integrated circuit chip (3).
  5. 5. An optical gas sensor according to any one of claims 1 to 3, wherein the light detection unit (1) comprises a first light detection unit (11) and a second light detection unit (12), and the first light detection unit (11) and the second light detection unit (12) are electrically connected to the integrated circuit chip (3); The optical filter unit (2) comprises a first optical filter unit (21) and a second optical filter unit (22), wherein the first optical filter unit (21) can be used for selecting light in a first wavelength range, the second optical filter unit (22) can be used for selecting light in a second wavelength range, the first wavelength range is not overlapped with the second wavelength range, the first optical detector unit (11) is at least partially arranged in alignment with the first optical filter unit (21), and the second optical detector unit (12) is at least partially arranged in alignment with the second optical filter unit (22); The first light detection part (11) is positioned at one side of the second light detection part (12) along a direction perpendicular to the height direction of the light detector (100).
  6. 6. Optical gas sensor according to claim 5, characterized in that the integrated circuit chip (3) is located at least partly between the first light detection section (11) and the second light detection section (12) in a direction perpendicular to the height direction of the light detector (100).
  7. 7. An optical gas sensor according to claim 3, characterized in that the filter (2) is part of the wall of the cavity (400), or The light detector (100) comprises a light transmission part (6), the light transmission part (6) is a part of the wall of the containing cavity (400), at least part of the light detection part (1) and at least part of the light filtering part (2) are aligned with the light transmission part (6), the light filtering part (2) is located in the containing cavity (400), along the height direction of the light detector (100), and the light detection part (1) and the light transmission part (6) are respectively located at two sides of the light filtering part (2).
  8. 8. An optical gas sensor according to claim 3, characterized in that the encapsulation (4) has an opening (40), the opening (40) extending through the wall of the encapsulation (4), the opening (40) being covered by the filter (2), or the light detector (100) further comprising a light-transmitting portion (6), the opening (40) being covered by the light-transmitting portion (6); along the height direction of the light detector (100), the opening (40) and the connecting part (5) are respectively positioned at two sides of the containing cavity (400), or the opening (40) is arranged at the connecting part (5).
  9. 9. Optical gas sensor according to any one of claims 3, 6 and 7, wherein the encapsulation (4) comprises a first housing part (41) and a second housing part (42); The first housing part (41) is provided with a containing groove (410), the containing groove (410) is at least partially used for forming the containing cavity (400), the containing groove (410) is provided with a notch (411), the first housing part (41) comprises a notch part (412), the notch part (412) comprises a groove wall (413) corresponding to the notch (411), the notch part (412) and the second housing part (42) are positioned on the same side of the packaging part (4) along the height direction of the optical detector (100), the second housing part (42) is connected with the notch part (412), a plane perpendicular to the height direction of the optical detector (100) is defined as a projection plane, and the inner outline of the orthographic projection of the notch part (412) on the projection plane is positioned within the outline of the orthographic projection of the second housing part (42) on the projection plane along the height direction of the optical detector (100); One of the first housing part (41) and the second housing part (42) comprises the connecting part (5).
  10. 10. Optical gas sensor according to any one of claims 3, 6 and 7, characterized in that the connection portion (5) comprises a base portion (53) and a conductive portion (54), the conductive portion (54) being arranged through the base portion (53); The base part (53) is an insulating part, the base part (53) comprises a first surface (531) and a second surface (532), the first surface (531) and the second surface (532) are respectively positioned at two sides of the base part (53) along the height direction of the light detector (100), the conductive part (54) comprises a first conductive end part (541) and a second conductive end part (542), the first conductive end part (541) is arranged at the first surface (531), the second conductive end part (542) is arranged at the second surface (532), the first conductive end part (541) is electrically connected with the light detection part (1) or the integrated circuit chip (3), and the connecting part (5) is a ceramic substrate or a printed circuit board, or The base body part is an insulating part or a metal part, the conductive part (54) is at least partially a wire, one end of the wire is electrically connected with the switching part (7), the other end of the wire is electrically connected with the circuit board (110), the wire is arranged in an insulating way with the base body part (53), and the switching part is a ceramic substrate or a printed circuit board; the containing cavity (400) is a closed containing cavity.
  11. 11. A light detector, characterized in that the light detector (100) comprises: a light detection section (1), the light detection section (1) being capable of generating a physical quantity change under irradiation of light, the physical quantity change being capable of changing with a change in concentration of a gas to be measured, the physical quantity change being capable of being converted into an electrical signal; a light filtering part (2), wherein the light detecting part (1) is at least partially arranged in alignment with the light filtering part (2); An integrated circuit chip (3), the integrated circuit chip (3) being electrically connected to the light detection section (1), the integrated circuit chip (3) being capable of processing the electrical signal, and And the light filtering part (2) is connected with the packaging part (4), and the light detection part (1) and the integrated circuit chip (3) are both positioned in the packaging part (4).
  12. 12. The light detector according to claim 11, characterized in that the light detection section (1) comprises a first light detection section (11) and a second light detection section (12), the first light detection section (11) and the second light detection section (12) being both electrically connected to the integrated circuit chip (3); The optical filter unit (2) comprises a first optical filter unit (21) and a second optical filter unit (22), wherein the first optical filter unit (21) can be used for selecting light in a first wavelength range, the second optical filter unit (22) can be used for selecting light in a second wavelength range, the first wavelength range is not overlapped with the second wavelength range, the first optical detector unit (11) is at least partially arranged in alignment with the first optical filter unit (21), and the second optical detector unit (12) is at least partially arranged in alignment with the second optical filter unit (22); The first light detection part (11) is positioned at one side of the second light detection part (12) along a direction perpendicular to the height direction of the light detector (100).

Description

Optical gas sensor and photodetector Technical Field The application relates to the technical field of sensing, in particular to an optical gas sensor and an optical detector. Background In the related art, an optical gas sensor includes a light source, a light detector including a light detecting portion, and a circuit board assembly, and the light detector generates a change and outputs an electrical signal when light emitted from the light source irradiates the light detecting portion. The circuit board assembly comprises a circuit board and a plurality of electronic components arranged on the circuit board, the optical detector is electrically connected with the circuit board, and the circuit board assembly processes, such as conditioning, storing, calculating and the like, the electric signals output by the optical detector, so that the sensor can detect the gas. In the related art, an electronic device for processing an electrical signal in an optical gas sensor is mounted on a circuit board, the circuit board is positioned in a cavity communicated with the outside of the optical gas sensor, and the outside of the optical gas sensor easily influences the processing of the electrical signal. Disclosure of Invention The application provides an optical gas sensor which is beneficial to reducing the influence of the outside on the electric signal processing. The application provides an optical gas sensor comprising a light detector and a circuit board, wherein the light detector comprises: A light detection section capable of generating a physical quantity change under irradiation of light, the physical quantity change being capable of changing with a change in concentration of a gas to be measured, the physical quantity change being capable of being converted into an electrical signal; a light filtering part, wherein the light detecting part is at least partially arranged in alignment with the light filtering part; An integrated circuit chip electrically connected to the light detection section, the integrated circuit chip capable of processing the electric signal, and And the light detection part and the integrated circuit chip are both positioned in the packaging part (4), and are electrically connected with the circuit board. The optical gas sensor provided by the application comprises the optical detector, wherein the optical detector comprises the optical detection part and the integrated circuit chip capable of processing the electric signal, the integrated circuit chip is electrically connected with the optical detection part, and the optical detection part and the integrated circuit chip are both positioned at the packaging part, so that the influence of the outside of the optical gas sensor on the electric signal processing is reduced. The photodetector provided by the application comprises: A light detection section capable of generating a physical quantity change under irradiation of light, the physical quantity change being capable of changing with a change in concentration of a gas to be measured, the physical quantity change being capable of being converted into an electrical signal; a light filtering part, wherein the light detecting part is at least partially arranged in alignment with the light filtering part; An integrated circuit chip electrically connected to the light detection section, the integrated circuit chip capable of processing the electric signal, and And the light filtering part is connected with the packaging part, and the light detection part and the integrated circuit chip are both positioned in the packaging part. The application provides a light detector which comprises a light detection part and an integrated circuit chip capable of processing electric signals, wherein the integrated circuit chip is electrically connected with the light detection part, and the light detection part and the integrated circuit chip are both positioned at a packaging part, so that the influence of the outside of the light detector on the electric signal processing is reduced. Drawings FIG. 1 is a schematic perspective view of an optical gas sensor according to an embodiment of the present application; FIG. 2 is a schematic cross-sectional view of a first embodiment of a light detector included in the optical gas sensor of FIG. 1; FIG. 3 is a schematic cross-sectional view of another angle of the photodetector shown in FIG. 2; FIG. 4 is a schematic cross-sectional view of a second embodiment of a photodetector included in the optical gas sensor of FIG. 1; FIG. 5 is a schematic view, partially in section, of the photodetector of FIG. 4; FIG. 6 is a schematic cross-sectional view of another angle of the photodetector shown in FIG. 4; FIG. 7 is a schematic cross-sectional view of a third embodiment of a photodetector included in the optical gas sensor of FIG. 1; FIG. 8 is a schematic view, partially in section, of the photodetector of FIG. 7; FIG. 9 is a schematic cross-sectional view of anot