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CN-122016782-A - Optical gas sensor and photodetector

CN122016782ACN 122016782 ACN122016782 ACN 122016782ACN-122016782-A

Abstract

The optical gas sensor comprises a light detector and a circuit board, wherein the light detector comprises a light detection part, an integrated circuit chip, a switching part and a packaging part, the integrated circuit chip is electrically connected with the light detection part, the light detection part and the integrated circuit chip are respectively electrically connected to the switching part, the switching part is electrically connected with the circuit board, the light detection part and the integrated circuit chip are both positioned in the packaging part, the influence of the outside of the optical gas sensor on electric signal processing is reduced, in addition, the light detection part and the integrated circuit chip are respectively electrically connected to the switching part, and the switching part is electrically connected to the circuit board, so that the electric connection between the light detection part and the integrated circuit chip and the circuit board is facilitated. The optical detector provided by the application comprises the optical detection part, the integrated circuit chip, the switching part and the packaging part, wherein 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, and the optical detection part and the integrated circuit chip are electrically connected with other parts in the sensor comprising the optical detector.

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
20250226
Priority Date
20241111

Claims (18)

  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 the concentration of a gas to be measured, and converting the physical quantity change into an electrical signal; An integrated circuit chip (3), wherein the integrated circuit chip (3) is electrically connected with the light detection part (1), and the integrated circuit chip (3) can process the electric signal; A transfer part (7), wherein the light detection part (1) and the integrated circuit chip (3) are respectively and electrically connected to the transfer part (7), the transfer part (7) is electrically connected with the circuit board (110), and And a packaging part (4), wherein the light detection part (1) and the integrated circuit chip (3) are contained in the packaging part (4).
  2. 2. The optical gas sensor according to claim 1, characterized in that it comprises a conditioning module electrically connected to the light detection portion (1), the conditioning module being able to condition the electrical signal; the conditioning module comprises a first conditioning part and a second conditioning part, and at least one of the first conditioning part and the second conditioning part is integrated with the integrated circuit chip.
  3. 3. Optical gas sensor according to claim 1 or 2, characterized in that the light detecting section (1) is a thermopile and the physical quantity is a potential difference.
  4. 4. Optical gas sensor according to claim 1 or 2, wherein the adapter part (7) comprises a main body part (71) and an electrical adapter part (72), the electrical adapter part (72) comprises a conductive material, the electrical adapter part (72) penetrates through the main body part (71), the electrical adapter part (72) comprises a first adapter end (721) and a second adapter end (722), the first adapter end (721) and the second adapter end (722) are respectively positioned at two sides of the adapter part (7) along the height direction of the optical detector (100), the first adapter end (721) is physically connected with the optical detection part (1) or the integrated circuit chip (3) and is electrically connected, the second adapter end (722) is physically connected with the connecting part (5), a plane perpendicular to the height direction of the optical detector (100) is defined as a projection plane, and the projected area of the first adapter end (721) on the projection plane is more than or equal to the second projection plane (722) of the projection plane (1/2 'S1, S2'.
  5. 5. The optical gas sensor according to claim 4, wherein the light detecting portion (1) comprises a first connection terminal (13), the integrated circuit chip (3) comprises a second connection terminal (31), the first connection terminal (721) comprises a first sub-connection terminal (7211) and a second sub-connection terminal (7212), the first sub-connection terminal (7211) is directly connected and electrically connected to the first connection terminal (13), and the second sub-connection terminal (7212) is directly connected and electrically connected to the second connection terminal (31); Along the height direction of the photodetector (100), the area of the orthographic projection of the first connecting end (13) on the projection surface is S1, the area of the orthographic projection of the second connecting end (31) on the projection surface is S2, the area of the orthographic projection of the first sub-switching end (7211) on the projection surface is S3, and the area of the orthographic projection of the second sub-switching end (7212) on the projection surface is S4,0.25< S1/S3<1,0.25< S2/S4<1.
  6. 6. Optical gas sensor according to claim 1 or 2, characterized in that the light detector (100) comprises a light filter (2), the light filter (2) being connected to the encapsulation (4); A plane perpendicular to the height direction of the light detector (100) is defined as a projection plane, and the orthographic projection of the light detection part on the projection plane is at least partially overlapped with the orthographic projection of the light filtering part (2) on the projection plane along the height direction of the light detector (100).
  7. 7. The optical gas sensor according to claim 6, wherein the photodetector (100) comprises a light transmitting portion (6), the light transmitting portion (6) is connected with the packaging portion (4), the light filtering portion is located inside the packaging portion (4), at least part of the light detecting portion (1) and at least part of the light filtering portion (2) are arranged in alignment with the light transmitting portion (6), and the light detecting portion (1) and the light transmitting portion (6) are located on two sides of the light filtering portion (2) respectively along the height direction of the photodetector (100).
  8. 8. Optical gas sensor according to claim 7, characterized in that the adapter part (7) comprises the filter part (2); The transfer part (7) comprises a main body part (71) and an electric transfer part (72), wherein the main body part (71) comprises glass, the electric transfer part (72) comprises a conductive material, the electric transfer part (72) penetrates through the main body part (71), the electric transfer part (72) comprises a first transfer end (721) and a second transfer end (722), the first transfer end (721) and the second transfer end (722) are respectively positioned at two sides of the transfer part (7) along the thickness direction of the transfer part (7), the first transfer end (721) is electrically connected with the light detection part (1) or the integrated circuit chip (3), and the second transfer end (722) is electrically connected with the connecting part (5); The main body (71) comprises a filter film, the filter film is covered on the surface of the glass, the main body (71) comprises the filter part (2), and the filter part (2) comprises the filter film.
  9. 9. Optical gas sensor according to claim 1, 2, 5, 7 or 8, characterized in that the adapter (7) is located within the encapsulation (4); The packaging part (4) comprises a connecting part (5), and the connecting part (5) is at least partially positioned between the switching part (7) and the circuit board (110) along the height direction of the light detector (100); the connecting portion (5) comprises a base portion (53) and a conductive portion (54), the conductive portion (54) penetrates through the base portion (53), the conductive portion (54) comprises a first conductive end portion (541) and a second conductive end portion (542), the first conductive end portion (541) is electrically connected with the switching portion (7), and the second conductive end portion (542) is electrically connected with the circuit board (110).
  10. 10. Optical gas sensor according to claim 9, characterized in that the base part (53) is an insulating part or a metal part.
  11. 11. The optical gas sensor according to claim 9, wherein the light detector (100) has a cavity (400) in which the light detection section (1) and the integrated circuit chip (3) are both located; the side wall of the packaging part is at least partially a cavity wall corresponding to the cavity, and the switching part (7) is positioned in the cavity.
  12. 12. The optical gas sensor of claim 1, wherein the adapter is connected to the package; The light detector (100) is provided with a cavity (400), the side wall of the packaging part is at least partially a cavity wall corresponding to the cavity, and the switching part is at least partially a cavity wall corresponding to the cavity.
  13. 13. The optical gas sensor according to claim 1,2, 5, 7, 8, 10, 11 or 12, wherein the adapter portion (7) comprises a body portion (71) and an electrical adapter portion (72), the electrical adapter portion (72) comprising an electrically conductive material; The optical detector (100) comprises a conducting part (9), wherein the conducting part (9) is a wire, the conducting part (9) is electrically connected with the light detection part (1) or the integrated circuit chip (3), the conducting part (9) is electrically connected with the switching part, and a space is reserved between at least part of the conducting part (9) and the switching part (72).
  14. 14. The optical gas sensor according to claim 1,2, 5, 7, 8, 10, 11 or 12, wherein the transfer portion (7) comprises a first transfer portion (73) and a second transfer portion (74), the light detection portion (1) is electrically connected to the first transfer portion (73), the integrated circuit chip (3) is electrically connected to the second transfer portion (74), and the first transfer portion (73) and the second transfer portion (74) are electrically connected to the circuit board (110); the first transfer part (73) is at least partially positioned between the circuit board (110) and the light detection part (1) along the height direction of the light detector (100), the second transfer part (74) is at least partially positioned between the circuit board (110) and the integrated circuit chip (3), and the second transfer part (74) is positioned at one side of the first transfer part (73) along the direction perpendicular to the height direction of the light detector (100).
  15. 15. The optical gas sensor according to claim 14, wherein 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 first switching part (73) comprises a first sub-switching part (731) and a second sub-switching part (732), the first light detection part (11) is physically and electrically connected with the first sub-switching part (731), and the second light detection part (12) is physically and electrically connected with the second sub-switching part (732); the second transition (74) is at least partially located between the first sub-transition (731) and the second sub-transition (732) in a direction perpendicular to the height direction of the light detector (100).
  16. 16. The optical gas sensor according to claim 1, 2, 5, 7, 8, 10, 11, 12 or 15, wherein the light detection section (1) includes 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) are each electrically connected to the integrated circuit chip (3), and at least one of the first light detection section (11), the second light detection section (12) and the integrated circuit chip (3) is mounted to the transfer section (7); defining a first direction and a second direction perpendicular to a height direction of the light detector (100), the first direction being perpendicular to the second direction, along which first direction the integrated circuit chip (3) is located between a first light detection portion (11) and a second light detection portion (12), along which second direction the first light detection portion (11) and the second light detection portion (12) are located on the same side of the integrated circuit chip (3).
  17. 17. 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 the concentration of a gas to be measured, and converting the physical quantity change into an electrical signal; An integrated circuit chip (3), wherein the integrated circuit chip (3) is electrically connected with the light detection part (1), and the integrated circuit chip (3) can process the electric signal; A transfer part (7), the transfer part (7) comprises a main body part (71) and an electric transfer part (72), the electric transfer part (72) comprises a conductive material, the electric transfer part (72) comprises a first transfer end (721) and a second transfer end (722), the light detection part (1) and the integrated circuit chip (3) are respectively and physically connected with the first transfer end (721) and electrically connected with each other, and And a packaging part (4), wherein the light detection part (1) and the integrated circuit chip (3) are contained in the packaging part (4).
  18. 18. The photodetector as claimed in claim 17, wherein the adapter is a silicon adapter plate or a glass adapter plate, and the electrical adapter (72) extends through the body (71) by a glass via or a silicon via process, or The switching part is a ceramic substrate or a printed circuit board, the optical detector (100) comprises a conducting part (9), the conducting part (9) is a conducting wire, the conducting part (9) is electrically connected with the light detection part (1) or the integrated circuit chip (3), the conducting part (9) is electrically connected with the switching part, and at least part of the conducting part (9) is spaced from the switching part (72).

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 located in a cavity communicated with the outside of the optical gas sensor, the outside of the optical gas sensor easily affects the processing of the electrical signal, and meanwhile, electrical connection among elements needs to be considered. Disclosure of Invention The application provides a miniaturized optical gas sensor. 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, which is changeable with a change in the concentration of the gas to be measured, under irradiation of light and converting the physical quantity change into an electric signal; An integrated circuit chip electrically connected to the light detection section, the integrated circuit chip being capable of processing the electrical signal; the light detection part and the integrated circuit chip are respectively and electrically connected to the switching part, the switching part is electrically connected with the circuit board, and And the packaging part is used for accommodating the light detection part and the integrated circuit chip. In addition, the optical gas sensor also comprises a switching part, the optical detection part and the integrated circuit chip are respectively and electrically connected to the switching part, and the switching part is electrically connected with the circuit board, so that the optical detection part and the integrated circuit chip are electrically connected with the circuit board through the switching part conveniently. The photodetector provided by the application comprises: A light detection section capable of generating a physical quantity change, which is changeable with a change in the concentration of the gas to be measured, under irradiation of light and converting the physical quantity change into an electric signal; An integrated circuit chip electrically connected to the light detection section, the integrated circuit chip being capable of processing the electrical signal; the optical detection device comprises a light detection part, an integrated circuit chip, a switching part, an optical detection part and an integrated circuit chip, wherein the switching part comprises a main body part and an electric switching part, the electric switching part comprises a conductive material, the electric switching part comprises a first switching end and a second switching end, the optical detection part and the integrated circuit chip are respectively and physically connected with the first switching end and are electrically connected with the first switching end, and And the packaging part is used for accommodating the light detection part and the integrated circuit chip. In addition, in the application, the optical detector also comprises a switching part, the optical detection part and the integrated circuit chip are respectively and physically connected with a first switching end of the switching part and electrically connected with the second switching end, and the second switching end can be electrically connected with other components in the sensor comprising the optical detector, so that the optical detection part and the integrated circuit chip are conveniently electrically connected with other components in the sensor comprising the optical detector through the switching part. 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 photodet