Gas detection module and spectrograph

Abstract

The utility model relates to a gas detection module and a spectrograph, the gas detection module comprises a detection module body, the left side and the right side of the detection module body are respectively provided with a gas inlet and a gas outlet; the interior of the detection module body is hollow to form a gas cavity; a detection window is arranged on the front side surface of the detection module body, the detection window is a through hole communicated with the gas cavity, and a window sheet is arranged at the detection window; the mounting base is arranged in the gas cavity and directly faces the diaphragm; a detection chip is arranged on the end face, facing the diaphragm, of the mounting base; and the laser beam is irradiated to the detection chip through the diaphragm. The gas detection device disclosed by the utility model can be used for gas detection based on Raman enhancement, and is high in sensitivity and specificity for detecting gas components, so that the gas detection becomes convenient and fast; and the gas detection module can be prepared and assembled on the existing portable Raman spectrometer, so that the portable Raman spectrometer realizes on-site rapid detection of solids, liquids and gases.

Description

Technical Field

[0001] The utility model relates to the technical field of Raman spectroscopy and gas detection, in particular to a gas detection module and a spectrometer, and more particularly to a gas detection module and a spectrometer based on Raman enhancement. Background Art

[0002] When incident light of a certain frequency strikes the surface of a sample material, scattered light is generated. Because energy transfer occurs between the molecules in the sample material and the excitation photons, the frequency of the light changes before and after scattering. This change in frequency depends on the characteristics of the sample material. Different sample materials have unique atomic group vibration modes, resulting in scattered light with a specific frequency difference from the incident light. The scattered light spectrum formed by the scattered light is called a Raman spectrum. This energy change reflects the structural characteristics of the material, and scientists call the spectrum obtained by the Raman effect the material's "fingerprint spectrum." In other words, different substances have different Raman spectra.

[0003] Gas detection is a crucial task in a variety of applications, including safety monitoring, environmental protection, and industrial process control. Traditional gas detection methods often rely on gas sensors, which can be complex, costly, and have limited sensitivity and specificity. They also face the challenge that some gases are difficult to detect or unsuitable for traditional methods.

[0004] Raman spectroscopy, a non-invasive spectroscopic analysis method, has been widely used for gas detection. Raman spectroscopy can be used to detect a variety of substances, including solids, liquids, and gases. However, unlike solid and liquid detection, Raman spectrometers cannot typically detect gases directly. Some preparation is usually required, such as: The sample gas typically needs to interact with a suitable substrate or surface for Raman scattering; the sample gas is adsorbed onto a solid surface; and the sample gas is passed through a sample chamber for interaction with the laser.

[0005] Portable Raman spectrometers in the existing technology do not have Raman gas detection capabilities. Problems that need to be solved include how to design a gas detection module, how to assemble the gas detection module into an existing portable Raman spectrometer, and what method to use to inject the test sample gas for Raman gas detection so that the portable Raman spectrometer can achieve on-site rapid detection of solids, liquids, and gases.

[0006] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0007] In response to the defects existing in the prior art, the purpose of the present utility model is to provide a gas detection module and a spectrometer. The gas detection module can be used for gas detection based on Raman enhancement and can be assembled on an existing portable Raman spectrometer, enabling the portable Raman spectrometer to achieve on-site rapid detection of solids, liquids and gases.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] A gas detection module, characterized in that the gas detection module 100 comprises: a detection module body, with an air inlet 1 and an air outlet 2 provided on its left and right sides respectively;

[0010] The interior of the detection module body is hollow to form a gas cavity 5, and the air inlet 1 and the air outlet 2 are both connected to the gas cavity 5;

[0011] A detection window is provided on the front side of the detection module body. The detection window is a through hole communicating with the gas cavity 5. A window piece 6 is provided at the detection window.

[0012] The mounting base is disposed in the gas cavity 5 and faces the window 6;

[0013] A detection chip 7 is provided on the end surface of the mounting base facing the window piece 6;

[0014] The laser beam 10 passes through the window 6 and irradiates the detection chip 7 .

[0015] On the basis of the above technical solution, the detection module body is formed by buckling a front shell and a rear shell, a buckling slot 9 is provided at the buckling portion, and an O-ring 8 is provided in the buckling slot 9.

[0016] On the basis of the above technical solution, a plurality of magnetic blocks 4 are provided at equal intervals along the edge of the detection window;

[0017] The magnetic block 4 is used to absorb the housing of the portable Raman spectrometer.

[0018] On the basis of the above technical solution, a number of positioning posts 3 are provided at equal intervals along the edge of the detection window;

[0019] The positioning column 3 is used to snap into the housing of the portable Raman spectrometer.

[0020] On the basis of the above technical solution, the positioning post 3 protrudes from the front side of the detection module body and is pluggable along the edge of the detection window.

[0021] On the basis of the above technical solution, the number of the positioning posts 3 is the same as that of the magnetic blocks 4, and the two are staggered.

[0022] On the basis of the above technical solution, a suction cup is provided at the end of the positioning column 3 .

[0023] Based on the above technical solution, the detection window is circular or elliptical.

[0024] On the basis of the above technical solution, the laser beam 10 is converged by the lens 11 and then irradiated to the detection chip 7 through the window 6;

[0025] The window 6 is coated with an anti-reflection film, which matches the wavelength of the spectrometer.

[0026] A spectrometer, characterized in that the spectrometer 101 is a portable Raman spectrometer, and any one of the aforementioned gas detection modules 100 is provided at a laser detection port of the portable Raman spectrometer.

[0027] The gas detection module and spectrometer described in the present invention have the following beneficial effects:

[0028] 1. It can be used for gas detection based on Raman enhancement, with high sensitivity and specificity in detecting gas components, making gas detection convenient.

[0029] 2. It can be assembled on an existing portable Raman spectrometer, enabling the portable Raman spectrometer to achieve on-site rapid detection of solids, liquids and gases.

[0030] 3. It can be widely used in gas detection, especially in applications that require rapid and high sensitivity, and can solve the problem of on-site rapid detection of chemical agents, explosives, flammable and explosive and toxic chemicals.

[0031] The gas detection module and spectrometer described in this utility model advance the field of gas detection, providing a more flexible and efficient solution that can be applied to various environmental conditions and meet various gas detection needs. They can be widely used in various applications, including but not limited to industry, environmental monitoring, and health and safety. The equipment can achieve rapid detection of toxic and hazardous substances, solid, liquid, and gaseous, in complex field environments, and is applicable to units such as chemical defense forces, armed police forces, emergency response units, public security forces, and customs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The utility model has the following drawings:

[0033] The accompanying drawings are provided to facilitate a better understanding of the present invention and do not constitute an undue limitation of the present invention.

[0034] Figure 1 A schematic diagram of a gas detection module described in the present invention.

[0035] Figure 2A cross-sectional view of a gas detection module according to the present invention.

[0036] Figure 3 Schematic diagram of gas detection principle.

[0037] Figure 4 A structural diagram of a spectrometer described in the present utility model. DETAILED DESCRIPTION

[0038] The present invention will be described in further detail below with reference to the accompanying drawings. The detailed description, which is provided in conjunction with exemplary embodiments of the present invention and includes various details of the embodiments to aid understanding, should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted from the following description.

[0039] like Figure 1 、 Figure 2 、 Figure 3 As shown, the utility model provides a gas detection module, comprising: a detection module body, with an air inlet 1 and an air outlet 2 respectively provided on the left and right sides thereof;

[0040] The interior of the detection module body is hollow to form a gas cavity 5, and the air inlet 1 and the air outlet 2 are both connected to the gas cavity 5;

[0041] A detection window is provided on the front side of the detection module body. The detection window is a through hole communicating with the gas cavity 5. A window piece 6 is provided at the detection window.

[0042] The mounting base is disposed in the gas cavity 5 and faces the window 6;

[0043] A detection chip 7 is provided on the end surface of the mounting base facing the window piece 6;

[0044] The laser beam 10 passes through the window 6 and irradiates the detection chip 7 .

[0045] In this embodiment, the sample gas is injected or blown in through the air inlet 1, and the air outlet 2 can ensure that the sample gas fills the entire gas cavity 5 without being affected by pressure; it is not limited to entering the air inlet 1 in the form of needle injection, hose connected to gas bottle, etc.

[0046] In this embodiment, the gas detection module can be used as a detection accessory of the spectrometer and assembled to the laser detection port of any commercially available portable Raman spectrometer, further enhancing the functionality of the portable Raman spectrometer. The portable Raman spectrometer can realize comprehensive measurement of solids, gases, and liquids.

[0047] In this embodiment, the shapes, lengths, and positions of the air inlet 1 and the air inlet 2 are not limited, and are not limited to being symmetrically arranged on both sides.

[0048] On the basis of the above technical solution, Figure 2 As shown, the detection module body is formed by buckling a front shell and a rear shell, a buckling slot 9 is provided at the buckling portion, and an O-ring 8 is provided in the buckling slot 9.

[0049] In this embodiment, the front housing and the rear housing can be quickly disassembled by means of the snap-fitting slot 9 ; the snap-fitting slot 9 and the O-ring 8 cooperate to ensure the airtightness of the gas chamber 5 .

[0050] The structure of the buckle slot 9 is not limited to buckles, magnets, threads, quick clips or other forms of closing two parts together to prevent air leakage.

[0051] On the basis of the above technical solution, a plurality of magnetic blocks 4 are provided at equal intervals along the edge of the detection window;

[0052] The magnetic blocks 4 are used to absorb the housing of the portable Raman spectrometer. In this embodiment, all the magnetic blocks 4 form a magnetic interface, which facilitates the rapid installation of the gas detection module on the spectrometer or the rapid removal of the gas detection module from the spectrometer.

[0053] On the basis of the above technical solution, a number of positioning posts 3 are provided at equal intervals along the edge of the detection window;

[0054] The positioning column 3 is used to snap into the housing of the portable Raman spectrometer.

[0055] The positioning post 3 protrudes from the front side of the detection module body and is pluggable and arranged along the edge of the detection window.

[0056] In this embodiment, the positioning post 3 is used to cooperate with the magnetic block 4 to more accurately align the optical axis of the gas detection module and the spectrometer, and fix them more firmly to prevent slipping.

[0057] On the basis of the above technical solution, the number of the positioning posts 3 is the same as that of the magnetic blocks 4, and the two are staggered.

[0058] For example, the number of the positioning posts 3 and the number of the magnetic blocks 4 are both four.

[0059] On the basis of the above technical solution, a suction cup is provided at the end of the positioning column 3 .

[0060] The housing of the portable Raman spectrometer is adsorbed by the suction cup, so that the positioning column 3 is clamped on the housing of the portable Raman spectrometer.

[0061] Based on the above technical solution, the detection window is circular or elliptical.

[0062] On the basis of the above technical solution, the laser beam 10 is converged by the lens 11 and then irradiated to the detection chip 7 through the window 6;

[0063] The window 6 is coated with an anti-reflection film, which matches the wavelength of the spectrometer.

[0064] The antireflection film is used to reduce the intensity loss of the laser beam 10 when it reaches the sample gas. The arrangement of the window 6 also ensures that the gas chamber 5 is airtight and leak-proof. The shapes of the detection window and the window 6 are not limited if they are too small.

[0065] like Figure 4 As shown, the present invention provides a spectrometer, wherein the spectrometer 101 is particularly a portable Raman spectrometer, and a gas detection module 100 is provided at a laser detection port of the portable Raman spectrometer.

[0066] In this embodiment, the gas detection process of the portable Raman spectrometer is as follows:

[0067] The sample gas is injected or blown into the gas chamber 5 through the gas inlet 1 until the sample gas fills the entire gas chamber 5;

[0068] Once the sample gas comes into contact with the detection chip 7, it will be adsorbed onto the detection chip 7 until it is fully adsorbed;

[0069] The portable Raman spectrometer is started, and the laser beam 10 is converged by the lens 11 and then irradiated from the detection window to the detection chip 7 to realize Raman detection of the gas.

[0070] In this embodiment, the portable Raman spectrometer is an advanced technology for detecting gas, which combines micro-nano technology and Raman spectroscopy principles to make gas detection more sensitive and convenient.

[0071] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0072] The above description is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by technical personnel in this field based on the content disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A gas detection module, characterized in that: The gas detection module (100) comprises: a detection module body, with an air inlet (1) and an air outlet (2) respectively provided on the left and right sides of the detection module body; The interior of the detection module body is hollow to form a gas cavity (5), and the gas inlet (1) and the gas outlet (2) are both in communication with the gas cavity (5); A detection window is provided on the front side of the detection module body, the detection window being a through hole communicating with the gas cavity (5), and a window piece (6) is provided at the detection window; The mounting base is arranged in the gas cavity (5) and faces the window piece (6); A detection chip (7) is provided on the end surface of the mounting base facing the window piece (6); The laser beam (10) passes through the window (6) and irradiates the detection chip (7).

2. A gas detection module according to claim 1, characterized in that: The detection module body is formed by buckling a front shell and a rear shell, a buckling slot (9) is provided at the buckling portion, and an O-ring (8) is provided in the buckling slot (9).

3. A gas detection module according to claim 1, characterized in that: A plurality of magnetic blocks (4) are provided at equal intervals along the edge of the detection window; The magnetic attraction block (4) is used for adsorbing the housing of the portable Raman spectrometer.

4. A gas detection module according to claim 3, characterized in that: A plurality of positioning posts (3) are provided at equal intervals along the edge of the detection window; The positioning column (3) is used for snapping onto the housing of the portable Raman spectrometer.

5. A gas detection module according to claim 4, characterized in that: The positioning column (3) protrudes from the front side of the detection module body and is arranged to be pluggable along the edge of the detection window.

6. A gas detection module according to claim 4, characterized in that: The number of the positioning posts (3) is the same as that of the magnetic blocks (4), and the two are arranged in an alternating manner.

7. A gas detection module according to claim 4, characterized in that: A suction cup is provided at the end of the positioning column (3).

8. A gas detection module according to claim 1, characterized in that: The detection window is circular or elliptical.

9. A gas detection module according to claim 1, characterized in that: After the laser beam (10) is converged by the lens (11), it passes through the window (6) and irradiates the detection chip (7); The window (6) is coated with an anti-reflection film, and the anti-reflection film matches the wavelength of the spectrometer.

10. A spectrometer, characterized in that: The spectrometer (101) is a portable Raman spectrometer, and the gas detection module (100) according to any one of claims 2 to 9 is provided at a laser detection port of the portable Raman spectrometer.

Images