Gas detection device

Abstract

The utility model discloses a gas detection device which comprises a fixed seat, a correction assembly, a light emitting assembly, a light splitting assembly, a light receiving assembly and a reference assembly, the correcting assembly is arranged on the fixing base. The light emitting assembly is arranged on the correction assembly and used for emitting light beams. The light splitting assembly is arranged on the fixing base and used for at least splitting the light beam into a first sub-light beam and a second sub-light beam, and the first sub-light beam can be transmitted to gas to be detected. The light receiving assembly is used for receiving the first sub-beam. The reference assembly is arranged on the fixed seat, and the second sub-beam can enter the reference assembly. According to the technical scheme provided by the embodiment of the utility model, the posture of the light emitting assembly is corrected, so that the second sub-light beam after light splitting can accurately enter the reference assembly, and the detection accuracy of the gas detection device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas detection technical field especially relates to a gas detection device. BACKGROUND

[0002] The gas detection device can quantify the gas concentration by capturing the absorption characteristics of the specific wavelength light beam to the gas. In the related art, the laser emitted by the laser is divided into two parts, one part is transmitted into the measurement environment, and the other part is transmitted into the reference component containing the gas sample with known concentration, so that the reference component can adjust the gas detection device according to the intensity change of the laser transmitted to its inside, so that the gas detection device can accurately measure the gas with unknown concentration. However, due to the difference between each laser in manufacturing process, the laser emitted by the laser deviates from the predetermined direction, and the split laser cannot be incident on the reference component, so that the reference component cannot adjust the gas detection device, or the detection accuracy of the adjusted gas detection device is low. SUMMARY

[0003] The utility model embodiment provides a kind of gas detection device, to make the light beam after beam splitting can be accurately incident reference component, improve the detection accuracy of gas detection device.

[0004] The utility model embodiment provides a kind of gas detection device, comprising:

[0005] Fixed seat;

[0006] Correction component, the correction component is located in the fixed seat;

[0007] Light emitting component, it is located in the correction component, and the light emitting component is used to emit light beam;

[0008] Splitting component, it is located in the fixed seat, and the splitting component is used to at least first sub-beam and second sub-beam with the light beam is split, and the first sub-beam can be transmitted to the gas to be measured;

[0009] Light receiving component, the light receiving component is used to receive the first sub-beam;And

[0010] Reference component, it is located in the fixed seat, and the second sub-beam can be incident reference component.

[0011] Optionally, the correction component includes correction piece, the correction piece is located between the light emitting component and the fixed seat, the correction piece has wedge structure, the wedge structure includes opposite first face and second face, the second face is inclined relative to the first face, the first face is towards the fixed seat, and the second face is towards the light emitting component.

[0012] Optionally, the correction assembly further comprises a fixing member connected to the correction member, and the fixing member and / or the correction member are connected to the fixing base, and the light emitting assembly is clamped between the correction member and the fixing member.

[0013] Optionally, the correction member is provided with a first opening, the fixing member is provided with a second opening, and a fastener is arranged through the second opening and the first opening and fastened to the fixing base.

[0014] Optionally, the first opening is provided with reinforcing glue, and / or the second opening is provided with reinforcing glue.

[0015] Optionally, the fixing member comprises a bending part, the bending part forms a groove, and the light emitting assembly is clamped in the groove.

[0016] Optionally, the gas detection device further comprises a refrigeration member, the refrigeration member is arranged on the fixing base, and the refrigeration member abuts against the correction member and / or the light emitting assembly.

[0017] Optionally, the refrigeration member is clamped between the correction assembly and the fixing base.

[0018] Optionally, the fixing base is provided with a clamping groove, and the correction assembly is partially clamped in the clamping groove and abuts against the refrigeration member, so that the correction assembly is clamped in the clamping groove.

[0019] Optionally, a heat conduction member is arranged between the refrigeration member and the correction assembly, and / or a heat conduction member is arranged between the refrigeration member and the light emitting assembly, and / or a heat conduction member is arranged between the correction assembly and the light emitting assembly.

[0020] The gas detection device provided by the embodiment of the utility model, the light emitting assembly can emit light beams, by arranging the light emitting assembly on the correction assembly and arranging the correction assembly on the fixing base, the correction assembly is used for correcting the posture of the light emitting assembly relative to the fixing base, after the light splitting assembly splits the light beams into the first sub-beam and the second sub-beam, the first sub-beam can be transmitted to the gas to be detected, and the second sub-beam can be more accurately incident into the reference assembly, the intensity of the second sub-beam received by the reference assembly is higher and more stable, the reference assembly can accurately adjust the parameters of the gas detection device, and the detection accuracy of the gas detection device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0022] Figure 1 A structure diagram of a gas detection device provided by the embodiment of the present application is shown in the figure.

[0023] Figure 2 A sectional view of the gas detection device provided by the embodiment of the present application is shown in the figure.

[0024] Figure 3 An exploded view of the gas detection device provided by the embodiment of the present application is shown in the figure.

[0025] Figure 4 A structure diagram of a correction member provided by the embodiment of the present application is shown in the figure.

[0026] Figure 5 A structure diagram of a fixing member provided by the embodiment of the present application is shown in the figure.

[0027] Main figure mark explanation:

[0028] 1, fixing seat; 11, bottom; 11a, clamping groove; 12, first protruding part; 2, correction assembly; 21, correction member; 21a, wedge structure; 211, first surface; 212, second surface; 21b, clamping part; 21c, first hole; 22, fixing member; 22a, second hole; 22b, bending part; 22c, connecting part; 23, fastener; 3, light emitting assembly; 4, light splitting assembly; 5, reference assembly; 6, refrigeration member; 7, light path adjusting assembly; 8, circuit board. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0030] Please refer to Figures 1 to 3The utility model discloses an embodiment provides a kind of gas detection device, gas detection device includes fixed seat 1, correction component 2, light emitting component 3, light splitting component 4, light receiving component (not shown in figure) and reference component 5.Wherein, correction component 2 is located in fixed seat 1.Light emitting component 3 is located in correction component 2, and light emitting component 3 is used to emit light beam.Light splitting component 4 is located in fixed seat 1, and light splitting component 4 is used to at least divide light beam into first sub-beam and second sub-beam, and first sub-beam can be transmitted to the gas to be measured.Light receiving component is used to receive first sub-beam.Reference component 5 is located in fixed seat 1, and second sub-beam can be incident reference component 5.

[0031] It can be understood that first sub-beam can be transmitted to the gas to be measured in external environment, and light receiving component receives first sub-beam after passing through the gas to be measured and carries out signal processing, to realize the detection of the concentration of the gas to be measured, and second sub-beam can be incident reference component 5, reference component 5 is filled with reference gas with known concentration, and reference component 5 can process second sub-beam after passing through reference gas, so that gas detection device can adjust parameters according to processing result, to improve the detection accuracy of gas detection device to the concentration of the gas to be measured.

[0032] The gas detection device of the embodiment is provided with light emitting component 3 on correction component 2, and correction component 2 is located in fixed seat 1, so as to correct the posture of light emitting component 3 relative to fixed seat 1 by correction component 2, correct the offset angle of light beam emitted by light emitting component 3, so that, after light splitting component 4 divides the light beam emitted by light emitting component 3 into first sub-beam and second sub-beam, the second sub-beam can be more accurately transmitted to the inside of reference component 5, so that the intensity of second sub-beam received by reference component 5 is higher and more stable, and reference component can more accurately adjust the parameters of gas detection device, to improve the detection accuracy of gas detection device.

[0033] Exemplarily, the light beam emitted by light emitting component 3 includes laser beam.

[0034] Exemplarily, reference component 5 includes air passage and photodetector, the air passage is formed with calibration gas chamber, and the calibration gas chamber is filled with reference gas, the posture of light emitting component 3 relative to fixed seat 1 is corrected by correction component 2, so that the second sub-beam divided from light beam can be more accurately transmitted to photodetector after passing through calibration gas chamber, and the intensity of light received by photodetector is higher and more stable.Wherein, air passage and photodetector can be separately arranged or integrally arranged.

[0035] Optionally, the light splitting component 4 includes, but is not limited to, a half-transmission half-reflection mirror, a triangular prism, a fiber coupler, etc. For example, the light splitting component 4 can include a lens with a transmittance of 90% and a reflectance of 10%. The light beam emitted by the light emitting component 3 is transmitted to the light splitting component 4. 90% of the light rays in the light beam are transmitted through the light splitting component 4 to form a first sub-beam which is transmitted to the external environment to be measured, and the other 10% of the light rays are reflected by the light splitting component 4 to form a second sub-beam which is transmitted to the reference component 5.

[0036] In combination Figure 3 and Figure 4 As shown in FIG. 1, in some embodiments, the correction component 2 includes a correction member 21 which is arranged between the light emitting component 3 and the fixed seat 1. The correction member 21 has a wedge-shaped structure 21a which includes a first face 211 and a second face 212 which are opposite to each other. The second face 212 is inclined relative to the first face 211. The first face 211 faces the fixed seat 1, and the second face 212 faces the light emitting component 3. It can be understood that the second face 212 is inclined relative to the first face 211, and the second face 212 and the first face 211 are arranged at an angle. The first face 211 can abut against the fixed seat 1, and the second face 212 can abut against the light emitting component 3. The light emitting component 3 is arranged at an angle relative to the fixed seat 1, and the posture of the light emitting component 3 relative to the fixed seat 1 is corrected, so that the second sub-beam can be more accurately transmitted to the inside of the reference component 5.

[0037] It is worth noting that when the light emitting component 3 with different degrees of deviation is installed to the fixed seat 1, the correction member 21 with different angles between the first face 211 and the second face 212 can be used. The posture of the light emitting component 3 with different degrees of deviation relative to the fixed seat 1 can be adjusted to different degrees. The light beams emitted by the light emitting component 3 with different degrees of deviation can be transmitted along the predetermined direction towards the light splitting component 4, and the second sub-beam divided from the light beams can be more accurately transmitted to the inside of the reference component 5.

[0038] For example, the correction member 21 can be made of chromium, iron, aluminum or aluminum alloy.

[0039] For example, the cross section of the wedge-shaped structure 21a taken by a plane perpendicular to the first face 211 and the second face 212 can be a triangle or a trapezoid. For example, when the cross section of the wedge-shaped structure 21a is a triangle, the cross line of the first face 211 and the second face 212 can be two adjacent sides of the triangle. When the cross section of the wedge-shaped structure 21a is a trapezoid, the cross line of the first face 211 and the second face 212 can be the waist of the trapezoid.

[0040] In combination Figure 5As shown, further, the correction assembly 2 further comprises a fixing member 22 connected to the correction member 21, and the fixing member 22 and / or the correction member 21 are connected to the fixing base 1, and the light emitting assembly 3 is clamped between the correction member 21 and the fixing member 22. By clamping the light emitting assembly 3 by the fixing member 22 and the correction member 21, the light emitting assembly 3 can be closely attached to the wedge-shaped structure 21a to adjust the posture of the light emitting assembly 3 relative to the fixing base 1.

[0041] Illustratively, the fixing member 22 can be made of chrome, iron or aluminum alloy.

[0042] In some embodiments, the correction member 21 and the fixing member 22 are made of the same material.

[0043] In some embodiments, the correction member 21 is provided with a first opening 21c, the fixing member 22 is provided with a second opening 22a, and the fastener 23 is inserted into the second opening 22a and the first opening 21c and fastened to the fixing base 1, thereby achieving the connection of the fixing member 22 and the correction member 21 and the connection of the correction member 21 and the fixing base 1, simplifying the connection structure and improving the connection strength between the fixing member 22 and the correction member 21 and between the correction member 21 and the fixing base 1.

[0044] Illustratively, the fastener 23 includes, but is not limited to, a screw, a bolt, etc.

[0045] Illustratively, the correction member 21 is provided with a first opening 21c at each of the opposite ends, the first opening 21c extends from the first face 211 to the second face 212, the fixing member 22 is provided with a second opening 22a at each of the opposite ends, and the fastener 23 includes two fasteners 23, each of which is inserted into the corresponding second opening 22a and the first opening 21c and fastened to the fixing base 1, thereby achieving the connection of the fixing member 22 and the correction member 21 and the connection of the correction member 21 and the fixing base 1, and facilitating the stability of the connection between the fixing member 22 and the correction member 21 and the stability of the connection between the correction member 21 and the fixing base 1.

[0046] Illustratively, as shown in Figures 1 to 3 The fixing base 1 comprises a bottom 11 and a first protrusion 12, the first protrusion 12 is protruded from one side of the bottom 11 along a third direction as shown in the Z direction in Figure 2 The correction member 21 and the fixing member 22 are arranged on one side of the first protrusion 12 along a first direction, which can be as shown in Figure 2The vertical direction shown is outward. The gas detection device further comprises a circuit board 8 arranged on the side of the first protrusion 12 away from the bottom 11, and the light emitting assembly 3 is connected at one end in the third direction to the circuit board 8, which can control the light emitting assembly 3 to emit a light beam. The other end of the light emitting assembly 3 is clamped between the correction member 21 and the fixing member 22 to adjust the posture of the light emitting assembly 3 relative to the fixing seat 1 and correct the deviation angle of the light beam emitted by the light emitting assembly 3. The bottom 11 can be provided with a through hole, and the light splitting assembly 4 can be arranged in the through hole and correspondingly arranged with the light emitting assembly 3, so that the light splitting assembly 4 is located on the light path of the light beam, and the light beam emitted by the light emitting assembly 3 can be transmitted to the light splitting assembly 4.

[0047] As shown in Figure 5 In some embodiments, the fixing member 22 comprises a bent portion 22b forming a groove, and the light emitting assembly 3 is clamped in the groove to facilitate the connection of the fixing member 22 and the correction member 21.

[0048] For example, the fixing member 22 comprises a bent portion 22b and two connecting portions 22c connected to the opposite ends of the bent portion 22b along the second direction shown in the Y direction in Figure 2 The bent portion 22b forms a groove, and the light emitting assembly 3 is clamped in the groove to facilitate the stable abutment of the two connecting portions 22c to the correction member 21, limit the posture of the fixing member 22 relative to the correction member 21, and improve the connection stability of the fixing member 22 and the correction member 21. Alternatively, in other examples, the correction member 21 can also form a groove, and the light emitting assembly 3 is clamped in the groove.

[0049] For example, the two connecting portions 22c can be respectively provided with second openings 22a, and the two fasteners 23 are respectively arranged in the corresponding second openings 22a and first openings 21c and fastened to the fixing seat 1 to realize the connection of the fixing member 22 and the correction member 21.

[0050] In some embodiments, the first opening 21c is provided with reinforcing glue, and / or the second opening 22a is provided with reinforcing glue. By arranging reinforcing glue in the first opening 21c, the reinforcing glue is filled between the fastener 23 and the wall surface of the first opening 21c, and by arranging reinforcing glue in the second opening 22a, the reinforcing glue is filled between the fastener 23 and the wall surface of the second opening 22a, thereby preventing the gas detection device from vibrating and causing the fastener 23 to loosen, and reducing the risk of the light beam emitted by the light emitting assembly 3 deviating due to loose installation.

[0051] Of course, in other embodiments, the light emitting assembly 3 can also be arranged on the correction member 21 by gluing, and the correction member 21 is arranged on the fixing seat 1 by gluing to realize the connection among the fixing seat 1, the correction member 21 and the light emitting assembly 3.

[0052] As shown in Figure 3 In some embodiments, the gas detection device further comprises a refrigeration member 6, which is arranged on the fixing seat 1 and abuts against the correction member 21 and / or the light emitting assembly 3. By arranging the refrigeration member 6 and abutting it against the correction member 21 and / or the light emitting assembly 3, the heat of the light emitting assembly 3 can be transferred to the refrigeration member 6 to regulate the temperature of the light emitting assembly 3.

[0053] Further, the refrigeration member 6 is clamped between the correction assembly 2 and the fixing seat 1, which not only ensures the stable installation of the refrigeration member 6 but also makes the refrigeration member 6 and the correction assembly 2 stably adhere to each other, so that the heat of the light emitting assembly 3 can be quickly transferred to the refrigeration member 6 through the correction assembly 2 to regulate the temperature of the light emitting assembly 3.

[0054] For example, one end of the refrigeration member 6 in the third direction can be connected to the circuit board 8, and the other end can be clamped between the correction member 21 and the fixing seat 1 to ensure the installation stability of the refrigeration member 6. Alternatively, the refrigeration member 6 can be connected to the fixing seat 1 and the correction member 21 by gluing.

[0055] Further, the fixing seat 1 is provided with a clamping groove 11a, and the correction assembly 2 is partially clamped in the clamping groove 11a and abuts against the refrigeration member 6, so that the refrigeration member 6 is clamped in the clamping groove 11a, thereby improving the installation stability of the correction assembly 2 and the refrigeration member 6.

[0056] For example, the first protruding part 12 is provided with a clamping groove 11a on one side in the first direction, the wedge-shaped structure 21a is provided with a clamping part 21b, the first surface 211 of the wedge-shaped structure 21a abuts against the outer circumferential surface of the fixing seat 1, the clamping part 21b is clamped in the clamping groove 11a, and the clamping part 21b abuts against the refrigeration member 6 to make the refrigeration member 6 stably clamped in the clamping groove 11a, thereby improving the installation stability of the correction member 21 and the refrigeration member 6.

[0057] In some embodiments, a heat-conducting member is arranged between the refrigeration member 6 and the correction assembly 2, and / or between the refrigeration member 6 and the light emitting assembly 3, and / or between the correction assembly 2 and the light emitting assembly 3, which improves the heat conduction efficiency of the heat of the light emitting assembly 3, enhances the heat dissipation effect, and is more effective in regulating the temperature of the light emitting assembly 3.

[0058] For example, the heat-conducting member includes heat-conducting silicone grease, heat-conducting gel, heat-conducting gasket, etc.

[0059] For example, the correction member 21 is located between the refrigeration member 6 and the light emitting assembly 3, a heat-conducting member is arranged between the correction member 21 and the light emitting assembly 3, and a heat-conducting member is arranged between the correction member 21 and the refrigeration member 6, thereby improving the heat conduction efficiency among the three.

[0060] In some embodiments, the gas detection device further comprises a light path adjusting assembly 7, which is arranged on the fixing base 1, the second sub-beam can be transmitted to the light path adjusting assembly 7, and the light path adjusting assembly 7 is used for adjusting the transmission direction of the second sub-beam, so that the second sub-beam can be transmitted to the reference assembly 5 and be incident on the reference assembly 5. By arranging the light path adjusting assembly 7, the transmission direction of the second sub-beam can be changed, and the installation of the light emitting assembly 3, the light splitting assembly 4 and the reference assembly 5 on the fixing base 1 is facilitated.

[0061] For example, the light path adjusting assembly 7 includes but is not limited to a lens, a mirror and the like.

[0062] For example, the light path adjusting assembly 7 includes a mirror, part of the light rays in the light beam are reflected by the light splitting assembly 4 to form the second sub-beam, and the second sub-beam is reflected by the mirror to the reference assembly 5 again after being transmitted to the mirror.

[0063] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A gas detection device, characterized by, The gas detection device comprises: a fixing base; a correction assembly arranged on the fixing base; a light emitting assembly arranged on the correction assembly, the light emitting assembly being configured to emit a light beam; a light splitting assembly arranged on the fixing base, the light splitting assembly being configured to split the light beam into at least a first sub-beam and a second sub-beam, the first sub-beam being configured to be transmitted to a gas to be detected; a light receiving assembly configured to receive the first sub-beam; and a reference assembly arranged on the fixing base, the second sub-beam being configured to be incident on the reference assembly. The correction assembly comprises a correction member arranged between the light emitting assembly and the fixing base, the correction member having a wedge-shaped structure comprising a first face and a second face opposite to each other, the second face being inclined relative to the first face, the first face being directed towards the fixing base, and the second face being directed towards the light emitting assembly.

2. The gas detection device of claim 1, wherein, The correction assembly further comprises a fixing member connected to the correction member, the fixing member and / or the correction member being connected to the fixing base, and the light emitting assembly being clamped between the correction member and the fixing member.

3. The gas detection device of claim 2, wherein, The correction member is provided with a first opening, the fixing member is provided with a second opening, and a fastener is arranged through the second opening and the first opening and fastened to the fixing base.

4. The gas detection device of claim 3, wherein, The first opening is provided with a reinforcing glue, and / or the second opening is provided with a reinforcing glue.

5. The gas detection device of claim 4, wherein, The fixing member comprises a bent portion forming a groove, and the light emitting assembly is clamped in the groove.

6. The gas detection device of claim 3, wherein, The gas detection device further comprises a refrigeration member arranged on the fixing base, the refrigeration member abutting against the correction member and / or the light emitting assembly.

7. The gas detection device according to any one of claims 1 to 6, wherein The refrigeration member is clamped between the correction assembly and the fixing base.

8. The gas detection device of claim 7, wherein, The fixing base is provided with a clamping groove, and the correction assembly is partially clamped in the clamping groove and abuts against the refrigeration member, so that the correction assembly is clamped in the clamping groove.

9. The gas detection device of claim 8, wherein, The refrigeration member and the correction assembly are provided with a heat conduction member, and / or the refrigeration member and the light emitting assembly are provided with a heat conduction member, and / or the correction assembly and the light emitting assembly are provided with a heat conduction member.

10. The gas detection device of claim 7, wherein, ​

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