Multi-spectrum infrared imaging gas intelligent detection device

Abstract

The utility model discloses a multi-spectrum infrared imaging gas intelligent detection device. The device comprises a shell, a lens assembly, a zooming and zooming mechanism, a calibration assembly, a refraction assembly, a light filtering mechanism and a detection assembly. By collecting infrared radiation information of different narrow spectral bands, the device can obtain richer spectral characteristics, qualitative and quantitative analysis of gas is realized, and the accuracy and reliability of gas detection are improved; and through the correction mechanism and the zooming mechanism, the device can eliminate errors caused by environmental changes and use time, can adapt to detection requirements of different distances, and ensures the accuracy of a detection result. The structure is compact and light, the refraction assembly folds a light path, light path envelope is reduced, and the instrument is made to be smaller in size, lighter in weight and convenient to carry and install.

Description

Technical Field

[0001] This application relates to the technical field of gas detection, and in particular to a multi-band infrared imaging intelligent gas detection device. Background Technology

[0002] With the acceleration of industrialization and urbanization, the demand for real-time monitoring and rapid response to gas leaks is becoming increasingly urgent. Infrared imaging technology has been widely used in the field of gas detection due to its advantages such as non-contact measurement, fast response speed, and wide measurement range. However, single-wavelength infrared imaging technology often only provides information on the temperature or concentration distribution of gases, and its ability to identify and quantitatively analyze gas types is limited. Utility Model Content

[0003] The purpose of this application is to provide a multi-band infrared imaging intelligent gas detection device to improve the accuracy and reliability of gas detection.

[0004] This application provides a multi-band infrared imaging gas intelligent detection device with the following technical solution: a housing; a lens assembly installed at the front end of the housing; a zoom mechanism including at least one first lens arranged along the optical path and a first power component for driving the first lens to move axially, the optical axis of the first lens coinciding with the optical axis of the lens assembly; a filtering mechanism, the filtering mechanism and the zoom mechanism being arranged in series along the optical path, including at least two filters that can selectively enter the optical path; and a detection component disposed in the optical path behind the filtering mechanism; wherein the distance between the first lens and the lens assembly is adjustable, and the filters have different light transmission bands.

[0005] By adopting the above technical solution, this application achieves continuous adjustment of the detection distance through a zoom and magnification mechanism, and with the adaptive zoom algorithm, realizes automatic zoom function to meet the gas detection needs at different distances; through the filter mechanism, multiple filters with different narrow spectral bands are inserted into the imaging optical path, and by collecting infrared radiation information of different narrow spectral bands, the device can obtain richer spectral features, realize qualitative and quantitative analysis of gases, and improve the accuracy and reliability of gas detection.

[0006] Optionally, the first power assembly includes: a first movable bracket mounted on the housing; a lead screw module mounted on the housing; and a first power source for driving the lead screw module to rotate; wherein the first lens is mounted on the first movable bracket, and the first movable bracket is connected to the movable end of the lead screw module.

[0007] By adopting the above technical solution, using a lead screw module as the connection structure between the first power source and the first moving support, the distance between the first lens and the lens assembly can be precisely controlled, thereby meeting the instrument's requirements for detecting different distances.

[0008] Optionally, the filtering mechanism further includes: a first mounting bracket installed on the housing; a filter wheel rotatably connected to the first mounting bracket; and a second power source for driving the filter wheel to rotate; wherein the filter is installed on the filter wheel and surrounds the rotation center of the filter wheel.

[0009] By adopting the above technical solution, the second power source drives the filter wheel to rotate, so that filters of different optical bands can be connected to the optical path, enabling the detection component to collect infrared radiation information in different narrow spectral bands of the gas, thereby obtaining richer spectral features and realizing qualitative and quantitative analysis of the gas.

[0010] Optionally, the filter wheel can maintain rotation under the action of the second power source.

[0011] By adopting the above technical solution, the continuous rotation of the filter wheel can effectively shorten the acquisition time and improve the instrument detection speed. The continuous rotation of the filter wheel enables 2-4 full-spectrum scans of the gas to be detected per second, which not only shortens the sampling time but also improves the refresh rate of gas concentration.

[0012] Optionally, a calibration component is further provided in the rear optical path of the lens assembly. The calibration component includes: a second mounting bracket installed on the housing; a calibration reference module installed on the housing; a second lens installed on the second mounting bracket; and a second power component that drives the second lens to move, the second power component being able to move the second lens to a first working position or a second working position; wherein, in the first working position, the optical path of the second lens is deviated from the rear optical path of the lens assembly, so that the optical path passes directly to the detection component; in the second working position, the second lens deflects the incident optical path to the calibration reference module.

[0013] By adopting the above technical solution, the calibration agency can adjust the optical path to calibrate the infrared core, thereby eliminating temperature errors caused by environmental changes or prolonged use.

[0014] Optionally, the zoom mechanism is located between the lens assembly and the calibration assembly.

[0015] By adopting the above technical solution, the calibration component is placed after the zoom and magnification mechanism, so that the aberrations generated during the zoom process can be corrected in real time by the subsequent calibration component. The integration of the calibration component and the zoom and magnification mechanism realizes the compression of the entire optical path.

[0016] Optionally, the second lens forms a third angle with the horizontal plane, and the third angle is less than 90°.

[0017] By adopting the above technical solution, the second lens is tilted to the horizontal plane, so that the horizontal light path is refracted in the vertical direction, which is beneficial to shortening the horizontal dimension.

[0018] Optionally, a refractive assembly is provided in the rear optical path of the lens assembly. The refractive assembly includes: a third mounting bracket mounted on the housing; at least one third lens and at least one fourth lens mounted on the third mounting bracket; wherein the optical axis of the third lens forms a first angle with the incident light path, and the third lens can change the direction of light propagation; the optical axis of the fourth lens is coaxial with the emitted light path of the third lens, and the fourth lens can converge the light emitted from the third lens; and the third lens and the fourth lens form a second angle.

[0019] By adopting the above technical solution, the refractive component is used to fold the optical path and reduce the optical path envelope, making the instrument smaller and lighter. The third lens can change the direction of optical path propagation, and the optical axis of the fourth lens is coaxial with the emitted optical path of the third lens. The fourth lens can converge the light emitted from the third lens.

[0020] Optionally, the incident light path of the refractive component is parallel to the emitted light path, and the second included angle is 45°.

[0021] By adopting the above technical solution, the optical path is folded multiple times, which greatly reduces the horizontal size of the device.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By collecting infrared radiation information from different narrow spectral bands, the device can acquire richer spectral features, enabling qualitative and quantitative analysis of gases and improving the accuracy and reliability of gas detection.

[0024] 2. High-precision calibration and zoom capability: Through the calibration mechanism and zoom / magnification mechanism, the device can eliminate errors caused by environmental changes and usage time, and adapt to the detection requirements of different distances, ensuring the accuracy of the detection results.

[0025] 3. The structure is compact and lightweight. The refractive component folds the optical path, reducing the optical path envelope, making the instrument smaller and lighter, and easier to carry and install. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0027] Figure 2 This application Figure 1 Sectional view of section AA;

[0028] Figure 3 This application Figure 1 Middle BB section view;

[0029] Figure 4 This application Figure 3 Schematic diagram of the overall structure of the second lens at different positions;

[0030] Figure 5 This application Figure 4 CC section view;

[0031] Figure 6 This is a schematic diagram of the overall structure of the filter wheel in Embodiment 1 of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Lens assembly; 3. Zoom / magnification mechanism; 31. Lead screw module; 32. First power source; 33. First moving bracket; 34. First lens; 4. Calibration assembly; 41. Second mounting bracket; 42. Second lens; 43. Second power assembly; 44. Calibration reference module; 5. Refraction assembly; 51. Third mounting bracket; 52. Third lens; 53. Fourth lens; 6. Filtering mechanism; 61. Filter; 62. Filter wheel; 621. Through slot; 63. Second power source; 64. First mounting bracket; 7. Detection assembly. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 - Appendix Figure 6 This application will be described in further detail.

[0034] This application discloses a multi-band infrared imaging intelligent gas detection device.

[0035] Example 1, referring to Figure 1 and Figure 2 A multi-band infrared imaging gas intelligent detection device includes a housing 1, a lens assembly 2, a zoom and magnification mechanism 3, a calibration component 4, a refraction component 5, a filter mechanism 6, and a detection component 7. The lens assembly 2 is mounted at the front end of the housing 1 and is used to receive infrared radiation from the target area. The zoom and magnification mechanism 3 and the filter mechanism 6 are connected in series along the optical path to adjust the detection distance and switch between different spectral bands. The calibration component 4 is used to correct optical path errors in real time. The refraction component 5 is used to fold the optical path, reducing the device size. The detection component 7 is used to receive and process infrared radiation signals to achieve qualitative and quantitative gas analysis. The incident infrared light passes sequentially through the lens assembly 2, the zoom and magnification mechanism 3, the calibration component 4, the refraction component 5, the filter mechanism 6, and the detection component 7.

[0036] The optical path mentioned in this application refers to the path that light travels when propagating in an optical system. It includes the entire process of light starting from the target object, passing through a series of optical elements, and finally reaching the detector or imaging surface. Figure 2As shown by the red dashed line. The optical components include lenses, mirrors, filters 61, beam splitters, etc. Each optical component has an input light path and an output light path. The input light path is used to receive light, and the output light path refers to the channel through which light passes through the optical component and reaches other components. For a single component, the light path refers to the path that light takes inside the component.

[0037] During the detection process, the optical path is automatically adjusted by the zoom mechanism 3 to enable the detection component 7 to acquire the best image; then the temperature of the detection component 7 is corrected by the calibration component 4; then the infrared spectrum images under different filters 61 are acquired by the filter mechanism 6; the infrared spectrum images under different filters 61 are analyzed and processed, and image data is output to realize the detection of gas.

[0038] refer to Figure 2 The lens assembly 2 includes three lenses mounted on the housing 1. The optical paths of the three lenses are coaxial. By focusing or diverging the light through the three lenses, the detection assembly 7 can clearly acquire the spectral information of the target object.

[0039] refer to Figure 2 The zoom and magnification mechanism 3 includes a first lens 34 and a first power component that drives the first lens 34 to move. In embodiment 1, the number of first lenses 34 is 1, corresponding to one first power component. Alternatively, there can be multiple first lenses 34 and multiple first power components. In embodiment 1, the first lens 34 is a lens. The first lens 34 can change the distance between itself and the lens assembly 2 through the first power component, thereby realizing gas detection at different distances. The first power component includes a lead screw module 31 mounted on the housing 1, a first moving bracket 33 mounted on the moving end of the lead screw module 31, and a first power source 32 that drives the lead screw module 31 to move. In embodiment 1, the first power source 32 is a motor. The first lens 34 is mounted on the first moving bracket 33, so the first power source 32 can realize the movement of the first lens 34.

[0040] refer to Figure 3 , Figure 4 and Figure 5The calibration component 4 includes a second mounting bracket 41 mounted on the housing 1, a calibration reference module 44 mounted on the housing 1, a second lens 42 mounted on the second mounting bracket 41, and a second power component 43 for driving the second lens 42 to move. In embodiment 1, the second lens 42 is a refractive lens, but it can also be a reflective lens. The angle between the second lens 42 and the horizontal plane is 45°. The reference module is mounted on the upper inner wall of the housing 1. When the second power component 43 drives the second lens 42 in series into the optical path, the second lens 42 can make the light perpendicular to the optical path by 90°, so that the light can illuminate the calibration reference module 44. In embodiment 1, the calibration reference module 44 is a blackbody reference. A blackbody is an idealized total absorber (emissivity = 1), and its radiation is determined only by temperature in thermal equilibrium. By using a known blackbody as a radiation source, the output signal of the system with different radiation quantities is obtained, thereby establishing the relationship between the radiation quantity at the system entrance pupil and the system output quantity, realizing a one-to-one correspondence between the radiation quantity and the electrical signal, and obtaining the absolute radiation responsivity of the system. That is, the light path is reflected onto the blackbody radiation source, which is a high-precision temperature controller. Then we use the blackbody to calibrate the detection module.

[0041] When the detection component 7 operates for an extended period or a temperature difference arises due to environmental changes, the second lens 42, under the action of the second power component 43, enters the optical path. The second lens 42, on the one hand, blocks the original detection optical path, and on the other hand, refracts the calibration light emitted by the calibration reference module 44 onto the detection component 7, thereby calibrating the temperature difference generated by the detection component 7. Figure 4 The green dashed line represents the calibration beam emitted by the calibration reference module 44.

[0042] In Embodiment 1, the second power component 43 includes a track and a linear motor. The second mounting bracket 41 is slidably connected to the track, and the output end of the linear motor is fixedly connected to the second mounting bracket 41.

[0043] refer to Figure 2 The refractive assembly 5 includes a third mounting bracket 51 mounted on the housing 1, a third lens 52 mounted on the third mounting bracket 51, and a fourth lens 53. The third lens 52 can be a reflector or a refractor, and the fourth lens 53 can be a lens. In embodiment 1, there are two third lenses 52 and two fourth lenses 53. Both third lenses 52 and four lenses 53 are perpendicular to the bottom wall of the housing 1. The two third lenses 52 are perpendicular to each other, and the two fourth lenses 53 are perpendicular to each other. The angle between the third lens 52 and the four lenses is 45°. The light passes through the third lens 52 and the fourth lens 53 once and undergoes two reflections, making the light entering the refractive assembly 5 parallel to the light exiting the refractive assembly 5.

[0044] refer to Figure 2 and Figure 6The filtering mechanism 6 includes a first mounting bracket 64 mounted on the housing 1, a filter wheel 62 rotatably connected to the first mounting bracket 64, filter sheets 61 mounted on the filter wheel 62, and a second power source 63 driving the filter wheel 62 to rotate. The filter wheel 62 has eight through slots 621 for mounting the filter sheets 61. Eight filter sheets 61 of different optical bands are installed in the through slots 621. The second power source 63 is a motor. The rotation center of the filter wheel 62 is offset from the optical path. As the filter wheel 62 rotates, the optical path of the filter sheets 61 can coincide with the entire detection optical path. During the detection process, the filter wheel 62 is constantly rotating, which greatly improves the acquisition efficiency of different spectra of the target object and realizes the acquisition of different spectra of the target object.

[0045] refer to Figure 2 In Example 1, taking the infrared core as an example, the detection component 7 first collects light from the gas at different distances through the zoom mechanism 3. The collected light is transmitted to the detection component 7 through the refraction component 5 and the filter mechanism 6. The light passes through the filter wheel 62 mechanism, so that multiple filters 61 with different narrow spectral bands enter the imaging optical path, and infrared spectral images under different filters 61 are collected. After processing methods such as differential operation, the specific information and characteristics of the gas are extracted.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-band infrared imaging intelligent gas detection device, characterized in that: include Shell (1); Lens assembly (2) is mounted on the front end of the housing (1); The zoom and magnification mechanism (3) includes at least one first lens (34) arranged along the optical path and a first power component that drives the first lens (34) to move axially. The optical axis of the first lens (34) coincides with the optical axis of the lens assembly (2). The filter mechanism (6) is connected in series with the zoom and magnification mechanism (3) along the optical path and includes at least two filters (61) that can selectively enter the optical path. The detection component (7) is disposed in the optical path behind the filter mechanism (6); The distance between the first lens (34) and the lens assembly (2) is adjustable, and the filter (61) has different light transmission bands.

2. The multi-band infrared imaging gas intelligent detection device according to claim 1, characterized in that: The first power assembly includes: The first movable bracket (33) is installed on the housing (1); The lead screw module (31) is installed in the housing (1); The first power source (32) drives the lead screw module (31) to rotate. The first lens (34) is mounted on the first movable bracket (33), and the first movable bracket (33) is connected to the movable end of the lead screw module (31).

3. The multi-band infrared imaging gas intelligent detection device according to claim 1, characterized in that: The filtering mechanism (6) further includes: The first mounting bracket (64) is installed on the housing (1); Rotate the filter wheel (62) connected to the first mounting bracket (64); A second power source (63) that drives the filter wheel (62) to rotate; The filter (61) is mounted on the filter wheel (62) and is located around the rotation center of the filter wheel (62).

4. The multi-band infrared imaging gas intelligent detection device according to claim 3, characterized in that: The filter wheel (62) can maintain rotation under the action of the second power source (63).

5. The multi-band infrared imaging gas intelligent detection device according to claim 1, characterized in that: A calibration component (4) is also provided in the optical path behind the lens assembly (2). The calibration component (4) includes: The second mounting bracket (41) is installed on the housing (1); The calibration reference module (44) is installed in the housing (1). The second lens (42) is mounted on the second mounting bracket (41); A second power assembly (43) that drives the second lens (42) to move, the second power assembly (43) being able to move the second lens (42) to a first working position or a second working position; in, First working position: The light path of the second lens (42) is deviated from the rear light path of the lens assembly (2), so that the light path is directly connected to the detection assembly (7). Second working position: The second lens (42) deflects the incident light path to the calibration reference module (44).

6. The multi-band infrared imaging gas intelligent detection device according to claim 5, characterized in that: The zoom and magnification mechanism (3) is located between the lens assembly (2) and the calibration assembly (4).

7. The multi-band infrared imaging gas intelligent detection device according to claim 5, characterized in that: The second lens (42) forms a third angle with the horizontal plane, and the third angle is less than 90°.

8. The multi-band infrared imaging gas intelligent detection device according to claim 1 or 5, characterized in that: A refractive component (5) is provided in the optical path behind the lens assembly (2), and the refractive component (5) includes: The third mounting bracket (51) is installed on the housing (1). At least one third lens (52) and at least one fourth lens (53) are mounted on the third mounting bracket (51). Among them, the optical axis of the third lens (52) forms a first angle with the incident light path, the third lens (52) can change the direction of light propagation, the optical axis of the fourth lens (53) is coaxial with the emitted light path of the third lens (52), the fourth lens (53) can converge the light emitted from the third lens (52), and the third lens (52) and the fourth lens (53) form a second angle.

9. The multi-band infrared imaging gas intelligent detection device according to claim 8, characterized in that: The incident light path of the refractive component (5) is parallel to the outgoing light path, and the second included angle is 45°.

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