Two-parameter gas detector

Abstract

The utility model discloses a two-parameter gas detector, which is applied to gas detection in an open space and comprises a shell, the shell is provided with a first light path, a second light path and a third light path which are parallel and penetrate through the shell, and the first light path is positioned between the second light path and the third light path; a photoelectric detector is installed in the first light path, a first laser emitter is installed in the second light path, a second laser emitter is installed in the second light path, and the wavelengths of lasers emitted by the first laser emitter and the second laser emitter are different; a lens assembly used for converging light beams to irradiate the photoelectric detector is installed in the first light path. Detection of two types of gases is realized, and the whole structure is convenient to carry and use.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection, in particular to a dual-parameter gas detector. Background Art

[0002] Gas detection is an important technology widely used in industrial production, environmental monitoring, safety protection, and other fields. Gas detection can help us understand gas concentration, composition, and its impact on the human body and the environment, allowing us to take appropriate measures to protect human health and environmental safety. Common gas detection methods include sensor detection, mass spectrometry, and chemical detection.

[0003] In the optical sensor detection method, during the propagation of laser light, absorption occurs when the laser passes through a special gas corresponding to its wavelength. The concentration of the special gas can be detected based on the intensity change before and after the light is absorbed.

[0004] In most laser gas detection applications, single gas detection is performed. When detecting composite gases, multiple detection devices or methods are required, which is not convenient for practical applications. Moreover, in open spaces containing composite gases, high requirements are placed on the detection equipment, requiring a high degree of centralization and high reliability. Utility Model Content

[0005] (1) Technical issues

[0006] The purpose of the utility model is to provide a dual-parameter gas detector, which emits lasers of different wavelengths through a tester and detects them through a detector, thereby realizing two gas detections and being portable.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] A dual-parameter gas detector includes a shell, on which are opened a first optical path, a second optical path, and a third optical path that are parallel to and pass through the shell, the first optical path being located between the second optical path and the third optical path; a photodetector is installed in the first optical path, a first laser emitter is installed in the second optical path, and a second laser emitter is installed in the second optical path, the laser wavelengths emitted by the first laser emitter and the second laser emitter being different; a lens assembly is installed in the first optical path for converging a light beam to illuminate the photodetector.

[0010] Preferably, the first light path includes a first mounting groove, a second mounting groove and a third mounting groove in a stepped structure, the lens assembly is installed in the first mounting groove and the second mounting groove, and the photoelectric detector is installed in the third mounting groove.

[0011] Preferably, the photoelectric detector outer shell is provided with a sleeve, and the sleeve is fixed in the third mounting groove.

[0012] Preferably, the lens assembly includes a gasket, a lens and a pressure ring installed in the second mounting groove, a spacer ring and a window piece provided on the spacer ring, a filter piece is provided between the spacer ring and the pressure ring, and a locking ring for pressing the window piece is provided in the first mounting groove.

[0013] Preferably, the second optical path includes a fourth mounting groove and a first through hole connected to the fourth mounting groove, the first laser emitter is installed in the fourth mounting groove, and a first cover plate for covering the fourth mounting groove is installed on the housing.

[0014] Preferably, the third optical path includes a fifth mounting groove and a second through hole connected to the fifth mounting groove, the second laser emitter is installed in the fifth mounting groove, and a second cover plate for covering the fifth mounting groove is installed on the housing.

[0015] Preferably, a sixth mounting slot and a circuit board mounted in the sixth mounting slot are formed on the housing.

[0016] Preferably, the shell is provided with a plurality of first mounting holes located on the side surface.

[0017] Preferably, the shell is provided with a plurality of second mounting holes located on the surface.

[0018] (3) Beneficial effects

[0019] By simultaneously arranging a first optical path, a second optical path, and a third optical path in parallel within a housing, wherein a photodetector is integrated within the first optical path, and a first laser emitter and a second laser emitter emitting lasers of different wavelengths are respectively integrated within the second optical path and the third optical path, it is possible to emit light of two different wavelengths for gas detection, which are then detected by the same photodetector after reflection. The overall volume is small, easy to carry, and dual-parameter gas detection is achieved, which can be applied to gas detection in open spaces.

[0020] At the same time, in order to combine the reflected laser beams, a lens assembly is provided in the first optical path, which can combine the reflected laser beams and then direct them toward the photoelectric detector to ensure detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic structural diagram of an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the exploded structure from a first perspective of an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the explosion structure from a second perspective of an embodiment of the utility model;

[0024] Figure 4 This is a schematic cross-sectional view of an embodiment of the present invention;

[0025] Figure 5 This is a schematic cross-sectional structural diagram of a housing in an embodiment of the present utility model;

[0026] exist Figures 1 to 5 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0027] Housing 1, first light path 2, first mounting slot 21, second mounting slot 22, third mounting slot 23, second light path 3, fourth mounting slot 31, first through hole 32, third light path 4, fifth mounting slot 41, second through hole 42, photodetector 5, first laser emitter 6, second laser emitter 7, lens assembly 8, gasket 81, lens 82, pressure ring 83, spacer 84, window 85, locking ring 86, filter 87, sleeve 9, first cover plate 10, second cover plate 11, sixth mounting slot 12, circuit board 13, first mounting hole 14, second mounting hole 15. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] See also Figure 1-Figure 5As shown, a dual-parameter gas detector is proposed in an embodiment of the present invention, which can be integrated into a detector with a gas chamber as a whole, and is mainly used to integrate dual-wavelength laser emission and reflected laser detection, so as to facilitate the detection of two gases at the same time. Specifically, it includes a shell 1, on which a first light path 2, a second light path 3 and a third light path 4 are parallel and pass through the shell 1. The first light path 2 is located between the second light path 3 and the third light path 4. The isolation and parallel arrangement of each other can avoid light interference inside the shell 1, wherein a photodetector 5 is installed in the first light path 2, a first laser emitter 6 is installed in the second light path 3, and a second laser emitter 7 is installed in the second light path 3. The laser wavelengths emitted by the first laser emitter 6 and the second laser emitter 7 are different. The laser emitted by the first laser emitter 6 is emitted toward the detected gas through the second light path 3, and the laser emitted by the second laser emitter 7 is emitted toward the detected gas through the second light path 3. After forming a reflected light path in the gas, it is finally reflected by the first light path 2 and detected by the photodetector 5, thereby obtaining a change in laser intensity and obtaining the type of detected gas. The specific detection principle is the existing technology and will not be repeated here.

[0030] Specifically, in order to ensure that the reflected laser can be directed to the photodetector 5 as vertically as possible and to increase the amount of reflected laser, a lens assembly 8 is installed in the first optical path 2 for converging the light beam to illuminate the photodetector 5. After the reflected laser is combined by the lens assembly 8, the amount detected by the photodetector 5 can be increased.

[0031] Specifically, the first optical path 2 includes a first mounting groove 21, a second mounting groove 22 and a third mounting groove 23 in a stepped structure. The lens assembly 8 is installed in the first mounting groove 21 and the second mounting groove 22, and the photodetector 5 is installed in the third mounting groove 23. By setting a stepped structure, some uncombined light can be blocked, and at the same time, the installation of the lens assembly 8 and the photodetector 5 is facilitated.

[0032] In order to ensure that the photoelectric detector 5 is covered and protected, a sleeve 9 is provided on the outer shell of the photoelectric detector 5 , and the sleeve 9 is fixed in the third installation groove 23 .

[0033] Specifically, the lens assembly 8 includes a gasket 81, a lens 82 and a pressure ring 83 installed in the second mounting groove 22. The pressure ring 83 is provided with a spacer 84 and a window 85 provided on the spacer 84. A filter 87 is provided between the spacer 84 and the pressure ring 83. The filter 87 is used to filter the light that is not detected. A locking ring 86 is provided in the first mounting groove 21 for pressing the window 85. The lens 82 is protected by the gasket 81 and fixed by the pressure ring 83. The lens 82 is a convex lens 82, which can realize that non-parallel lasers are combined and become parallel. At the same time, a window 85 is installed above the lens 82 to protect the interior. The spacer 84 forms a buffer between the lens 82 and the window 85, and the locking ring 86 locks the window 85, thereby completing the installation of the entire lens assembly 8.

[0034] Specifically, the second optical path 3 includes a fourth mounting groove 31 and a first through hole 32 connected to the fourth mounting groove 31. The first laser emitter 6 is installed in the fourth mounting groove 31. A first cover plate 10 for covering the fourth mounting groove 31 is installed on the shell 1. The fourth mounting groove 31 is provided to facilitate the assembly of the first laser emitter 6, and the first cover plate 10 is used to achieve covering protection.

[0035] Similarly, the third optical path 4 includes a fifth mounting groove 41 and a second through hole 42 connected to the fifth mounting groove 41. The second laser emitter 7 is installed in the fifth mounting groove 41. The housing 1 is provided with a second cover plate 11 for covering the fifth mounting groove 41, so as to facilitate the disassembly and assembly of the second laser emitter 7 and realize covering and protection through the second cover plate 11.

[0036] In this way, the first laser emitter 6 and the second laser emitter 7 can be disassembled and maintained.

[0037] At the same time, a sixth mounting slot 12 and a circuit board 13 mounted in the sixth mounting slot 12 are provided on the housing 1. The circuit board 13 related to the control circuit is integrated into the housing 1 to form a whole. The entire module can be used independently and as a whole.

[0038] Specifically, a plurality of first mounting holes 14 are provided on the side of the shell 1, and a plurality of second mounting holes 15 are provided on the surface of the shell 1. The shell 1 can be fixedly connected through the first mounting holes 14 and the second mounting holes 15, so that the entire module can be installed.

[0039] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., etc., are used solely for distinction and description, and should not be construed as indicating or implying relative importance.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A dual-parameter gas detector, characterized in that: The invention comprises a housing (1), wherein a first light passage (2), a second light passage (3) and a third light passage (4) are provided on the housing (1), the first light passage (2) being located between the second light passage (3) and the third light passage (4); A photodetector (5) is installed in the first optical path (2), a first laser emitter (6) is installed in the second optical path (3), and a second laser emitter (7) is installed in the second optical path (3), wherein the laser wavelengths emitted by the first laser emitter (6) and the second laser emitter (7) are different; A lens assembly (8) for converging a light beam and irradiating it onto the photodetector (5) is installed in the first light passage (2).

2. A dual-parameter gas detector according to claim 1, characterized in that: The first light path (2) comprises a first mounting groove (21), a second mounting groove (22), and a third mounting groove (23) in a stepped structure; the lens assembly (8) is mounted in the first mounting groove (21) and the second mounting groove (22); and the photodetector (5) is mounted in the third mounting groove (23).

3. A dual-parameter gas detector according to claim 2, characterized in that: The outer shell of the photoelectric detector (5) is provided with a sleeve (9), and the sleeve (9) is fixed in the third installation groove (23).

4. A dual-parameter gas detector according to claim 2, characterized in that: The lens assembly (8) comprises a gasket (81), a lens (82) and a pressing ring (83) installed in the second mounting groove (22); a spacer (84) and a window (85) arranged on the spacer (84) are provided on the pressing ring (83); a filter (87) is provided between the spacer (84) and the pressing ring (83); and a locking ring (86) for pressing the window (85) is provided in the first mounting groove (21).

5. A dual-parameter gas detector according to claim 1, characterized in that: The second optical path (3) comprises a fourth mounting groove (31) and a first through hole (32) communicating with the fourth mounting groove (31); the first laser emitter (6) is mounted in the fourth mounting groove (31); and a first cover plate (10) for covering the fourth mounting groove (31) is mounted on the housing (1).

6. A dual-parameter gas detector according to claim 1, characterized in that: The third optical path (4) comprises a fifth mounting groove (41) and a second through hole (42) communicating with the fifth mounting groove (41); the second laser emitter (7) is mounted in the fifth mounting groove (41); and a second cover plate (11) for covering the fifth mounting groove (41) is mounted on the housing (1).

7. A dual-parameter gas detector according to any one of claims 1 to 6, characterized in that: The housing (1) is provided with a sixth mounting slot (12) and a circuit board (13) mounted in the sixth mounting slot (12).

8. A dual-parameter gas detector according to claim 7, characterized in that: The housing (1) is provided with a plurality of first mounting holes (14) located on the side surface.

9. A dual-parameter gas detector according to claim 7, characterized in that: The housing (1) is provided with a plurality of second mounting holes (15) located on the surface.

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