Intelligent sensing multi-channel pump suction type gas detector and use method thereof

Abstract

The application discloses a kind of intelligent sensing multi-channel pump suction type gas detector and its using method, including long optical path gas chamber, gas inlet end cover, gas outlet end cover, detection sleeve wheel, reference sleeve wheel, infrared light source;Long optical path gas chamber is hollow cylindrical shell structure, gas inlet end cover and gas outlet end cover are fixedly installed in the opening of long optical path gas chamber left and right sides respectively;The central axis of light outlet hole and light inlet hole divides long optical path gas chamber into left and right two parts in the length direction of long optical path gas chamber, and detection sleeve wheel and reference sleeve wheel are rotatably sleeved on the outside of long optical path gas chamber by bearing, and detection sleeve wheel and reference sleeve wheel are respectively sleeved on the left and right sides of the central axis of light outlet hole and light inlet hole, realize the detection of multiple gas components in a compact structure.

Description

Technical Field

[0001] This invention belongs to the field of intelligent sensor technology, and relates to a gas detector, and more particularly to an intelligent sensing multi-channel pump-suction gas detector. Background Technology

[0002] To achieve multi-channel detection and analysis of multiple gases, existing technologies have developed multi-channel filter wheel-type gas detection devices. These devices feature a disc-shaped multi-channel modulation wheel with a detector connected to its infrared light-emitting aperture. The surface of the modulation wheel has multiple annularly distributed light-transmitting holes, each with a filter at one end and a calcium fluoride window at the other. By distributing two or more pairs of filters with different characteristic wavelengths on the modulation wheel, two or more sets of measurement channels are formed, each capable of detecting one gas. When the modulation wheel rotates under the drive of a motor, the two light-transmitting holes of each measurement channel sequentially pass through the optical axis of the infrared light source, thus achieving the purpose of measuring multiple gases. However, this disc-shaped design limits the number of filters that can be arranged in a circular pattern (one filled with the detection gas and one filled with nitrogen as a reference channel). To increase the number of gases to be detected, the disc-shaped modulation wheel needs to be replaced, or its diameter increased, which is detrimental to the portability of the gas detector.

[0003] Therefore, in order to increase the number of gas detection channels as much as possible without increasing the size and complexity of the gas detection device, this invention provides an intelligent sensing multi-channel pump-suction gas detector and its usage method. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-channel pump-suction gas detector and its usage method to solve the technical problems in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-channel pump-suction gas detector includes a long optical path gas chamber, an inlet end cap, an outlet end cap, a detection sleeve, a reference sleeve, an infrared light source, and an intelligent sensor controller.

[0007] The long-path gas chamber is a hollow cylindrical shell structure, with the inlet end cap and outlet end cap fixedly installed on the openings on the left and right sides of the long-path gas chamber, respectively.

[0008] The hollow cylindrical shell of the long optical path gas chamber has light-emitting holes and light-inlet holes symmetrically arranged on the cylindrical wall about the center of the gas chamber's central axis. The central axes of the light-emitting holes and light-inlet holes are collinear and intersect perpendicularly with the central axis of the gas chamber.

[0009] An infrared light source is located on the outside of the long-path gas chamber and directly opposite the light inlet; an infrared detector is located on the outside of the light outlet.

[0010] The central axis of the light outlet and the light inlet divides the long optical path gas chamber into left and right parts along the length of the long optical path gas chamber. The detection sleeve and the reference sleeve are rotatably sleeved on the outside of the long optical path gas chamber through bearings, and the detection sleeve and the reference sleeve are respectively sleeved on the left and right sides of the central axis of the light outlet and the light inlet. The detection sleeve and the reference sleeve are respectively connected to a rotary encoder, and the rotary encoder is connected to the intelligent sensor controller for data transmission.

[0011] The intelligent sensor controller is used to control the synchronous rotation of the detection sleeve and the reference sleeve.

[0012] Preferably, both the detection sleeve and the reference sleeve are circular structures with the same structural dimensions, and the detection sleeve and the reference sleeve are symmetrically installed about the central axis of the light output hole and the light input hole.

[0013] Preferably, the detection sleeve is provided with a plurality of "convex"-shaped first sliding grooves arranged in an annular array along the outer circumference of its ring. The sliding length direction defined by the first sliding groove is the same as the length axis direction of the long optical path gas chamber. A detection strip is slidably installed in each first sliding groove, and the shape of the detection strip matches the first sliding groove.

[0014] Preferably, the detection strip is provided with a light-transmitting hole, and when the detection strip is slidably installed on the first sliding groove, the central axis of the light-transmitting hole intersects perpendicularly with the central axis of the annular ring of the detection sleeve.

[0015] Preferably, a calcium fluoride window is glued to one side of the light-transmitting hole with sealant, and a filter of a specific wavelength is glued to the other side with sealant. The light-transmitting hole is sealed by the calcium fluoride window and the filter into a closed space, which is filled with nitrogen gas.

[0016] Preferably, the filter installed on each detection strip on the detection sleeve has a different characteristic wavelength, corresponding to the absorption wavelength of different gases.

[0017] Preferably, a reference strip corresponding to the wavelength of the detection strip is slidably mounted on the reference sleeve. The reference strip is provided with a light-transmitting hole, and the characteristic wavelength of the filter on it corresponds to that of the detection strip. The sealed space inside the light-transmitting hole of the reference strip is filled with a high concentration of target gas, and the type of target gas corresponds to the characteristic wavelength of the filter on it. A reference strip and a detection strip used to detect the same gas are installed in the same phase in the circumferential direction, and the detection sleeve and the reference sleeve rotate synchronously under the drive of the rotation drive structure.

[0018] Preferably, both the detection sleeve and the reference sleeve have drive teeth on their annular end faces. The detection sleeve is provided with a first drive structure, which includes a first drive gear and a first drive motor. The first drive motor drives the first drive gear to rotate, and the first drive gear meshes with the drive teeth on the detection sleeve. A second drive structure is provided corresponding to the reference sleeve. The second drive structure includes a second drive gear and a second drive motor. The second drive motor drives the second drive gear to rotate, and the second drive gear meshes with the drive teeth on the reference sleeve.

[0019] Preferably, a detection strip driving structure for driving the detection strip to slide and a reference strip driving structure for driving the reference strip to slide are respectively provided near the light-entry aperture; the detection strip driving structure includes a first friction wheel and a first friction wheel motor for driving the first friction wheel to rotate; the reference strip driving structure includes a second friction wheel and a second friction wheel motor for driving the second friction wheel to rotate; the outer surface of the first friction wheel is in contact with the outer surface of the detection strip at the phase of the light-entry aperture; the outer surface of the second friction wheel is in contact with the outer surface of the reference strip at the phase of the light-entry aperture.

[0020] A method for using a multi-channel pump-suction gas detector, characterized by the following steps:

[0021] S1: Turn on the air pump and maintain it for a certain period of time to ensure that the gas to be tested fills the long optical path gas chamber;

[0022] S2: The intelligent sensor controller controls the detection sleeve and the reference sleeve to rotate synchronously, rotating the detection strip and the reference strip corresponding to the first gas to be detected to the phase of the light inlet hole;

[0023] S3: The intelligent sensor controller first drives the control detection strip to slide toward the light inlet hole and makes the axis of the light inlet hole coincide with the axis of the light inlet hole;

[0024] S4: Power on the infrared light source, detect the intensity of the first emitted light through an infrared detector on the light emission aperture side, and then turn off the infrared light source;

[0025] S5: The intelligent sensor controller drives the detection strip to reset, and then controls the reference strip to slide toward the light-inlet hole and make its light-transmitting hole axis coincide with the light-inlet hole axis;

[0026] S6: Power on the infrared light source, detect the intensity of the second emitted light through an infrared detector on the light emission aperture side, and then turn off the infrared light source;

[0027] S7: The intelligent sensor controller compares the intensity of the first emitted light and the intensity of the second emitted light, and calculates the concentration of the first gas to be detected.

[0028] S8: The intelligent sensor controller then controls the detection sleeve and reference sleeve to rotate synchronously, rotating the detection strip and reference strip corresponding to the second gas to be detected to the phase of the light inlet hole. Repeat S3-S7 above, calculate the concentration of the second gas to be detected, the concentration of the third gas to be detected, etc. until all gas components to be detected have been detected, and then turn off the gas pump to end the detection.

[0029] The beneficial effects of this invention are:

[0030] By setting a detection sleeve and a reference sleeve to rotate and fit around the outside of the long optical path gas chamber, and with the detection sleeve and reference sleeve respectively fitted on the left and right sides of the central axis of the light output hole and the light input hole, and multiple pairs of detection strips and reference strips slidingly installed on the detection sleeve and reference sleeve respectively, it is possible to detect multiple gas components in multiple channels in a compact structure. Only one long optical path gas chamber is required, and there is no need to set a large rotating multi-channel modulation wheel. This does not increase the size and complexity of the gas detection device, and maximizes the number of gas detection channels. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the lateral structure of the present invention. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the lateral structure of the present invention. Figure 2 ;

[0033] Figure 3 This is a schematic diagram of the cross-sectional structure of the detection collar of the present invention;

[0034] Figure 4 This is a schematic diagram of the detection strip structure of the present invention;

[0035] The meanings of the reference numerals in the figure are as follows:

[0036] Long-path gas chamber 1, air inlet end cover 2, air outlet end cover 3, detection sleeve 4, reference sleeve 5, infrared light source 10, main concave reflector 13, first secondary concave reflector 14, second secondary concave reflector 15, first plane reflector 16, second plane reflector 17, light outlet 11, light inlet 12, air inlet 21, air outlet 31, first sliding groove 42, detection strip 41, light transmission hole 411, calcium fluoride window 412a, filter 412b, reference strip 51, first drive gear 61, first drive motor 62, second drive gear 71, second drive motor 72, first friction wheel 81, first friction wheel motor 82, second friction wheel 91, second friction wheel motor 92. Detailed Implementation

[0037] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings and preferred embodiments.

[0038] For reference Figure 1-3 The structure of the intelligent sensing multi-channel pump-suction gas detector of the present invention is described. For example... Figure 1-3 As shown, it includes a long-path gas chamber 1, an inlet end cap 2, an outlet end cap 3, a detection sleeve 4, a reference sleeve 5, an infrared light source 10, and an intelligent sensor controller. The long-path gas chamber 1 is a hollow cylindrical shell structure. The inlet end cap 2 and the outlet end cap 3 are respectively fixedly installed on the openings on the left and right sides of the long-path gas chamber 1. The long-path gas chamber 1 includes a conventional gas chamber optical system formed by a main concave reflector 13, a first secondary concave reflector 14, a second secondary concave reflector 15, a first plane reflector 16, and a second plane reflector 17.

[0039] The back of the main concave reflector 13 is fixedly mounted to the air inlet end cap 2, and the backs of the first auxiliary concave reflector 14 and the second auxiliary concave reflector 15 are fixedly mounted to the air outlet end cap 3. A light-emitting hole 11 and a light-inlet hole 12 are symmetrically arranged on the wall of the hollow cylindrical shell of the long-path gas chamber 1 about the center of the chamber's central axis. The central axes of the light-emitting hole 11 and the light-inlet hole 12 are collinear and intersect perpendicularly with the central axis of the chamber. Both the light-inlet hole 12 and the light-emitting hole 11 are fitted with transparent glass. The first auxiliary concave reflector 14 and the second auxiliary concave reflector 15 are of the same size, and their centers of curvature fall on the reflecting surface of the main concave reflector 13 and are symmetrically distributed on both sides of the perpendicular plane of the long-path gas chamber 1. The center of curvature of the main concave reflector 13 falls on the perpendicular plane of the long-path gas chamber 1. The main concave reflector 13, the first auxiliary concave reflector 14, and the second auxiliary concave reflector 15 have equal radii of curvature. The first planar reflector 16 is installed inside the long-path gas chamber 1, with its center passing through the central axis of the light inlet hole 12, and its normal direction forming a certain angle with the axis of the light inlet hole 12. The second planar reflector 17 is installed inside the long-path gas chamber 1, with its center passing through the central axis of the light outlet hole 11, and its normal direction forming a certain angle with the axis of the light outlet hole 11. The infrared light source 10 is located outside the long-path gas chamber 1 and faces the light inlet hole 12. When powered on, it can radiate infrared rays into the light inlet hole 12. An infrared detector (not shown) is installed outside the light outlet hole 11. The infrared detector is used to detect the intensity of infrared light of a specific wavelength emitted from the light outlet hole 11, thereby realizing the detection of gas components. An air inlet hole 21 is provided on the air inlet end cover 2, and an air inlet pipe (not shown) is inserted into the air inlet hole 21 for drawing in the gas to be detected. An air outlet 31 is provided on the air outlet cap 3. An air pump (not shown) is connected to the outside of the air outlet 31. The air pump can be configured as a diaphragm pump or other air pump structure. After the air pump is powered on, gas is drawn out from the air outlet 31 of the long optical path gas chamber 1, and at the same time, a negative pressure is formed inside the long optical path gas chamber 1, which is then drawn in through the air inlet 21, so that the gas to be detected fills the long optical path gas chamber 1. Unlike the prior art where the air inlet and outlet are set on the wall of the gas chamber, the present invention sets the air inlet and outlet at both ends of the long optical path gas chamber 1, so that the drawn-in gas can uniformly and completely fill the gas chamber, ensuring the accuracy of the detection.

[0040] The central axes of the light exit hole 11 and the light inlet hole 12 divide the long-path gas chamber 1 into left and right parts along its length. The detection sleeve 4 and the reference sleeve 5 are both rotatably sleeved on the outside of the long-path gas chamber 1 via bearings, and are respectively sleeved on the left and right sides of the central axes of the light exit hole 11 and the light inlet hole 12. The axial and radial degrees of freedom of the detection sleeve 4 and the reference sleeve 5 relative to the long-path gas chamber 1 are limited by bearings and stepped shafts, retaining only the degree of freedom in the rotational direction relative to the central axis of the long-path gas chamber 1. The bearings for mounting the detection sleeve 4 and the reference sleeve 5 can be thin-film tapered roller bearings to ensure axial and radial limitation.

[0041] Both the detection sleeve 4 and the reference sleeve 5 are circular structures with identical dimensions, and are symmetrically installed about the central axis of the light outlet hole 11 and the light inlet hole 12. Taking the detection sleeve 4 as an example... Figure 3 As shown, the detection sleeve 4 has multiple "convex"-shaped first grooves 42 arranged in a ring array along its outer circumference. The sliding length direction defined by the first groove 42 is the same as the length axis direction of the long optical path gas chamber 1. A detection strip 41 is slidably installed in each first groove 42. The shape of the detection strip 41 matches the first groove 42. Figure 4 As shown, the detection strip 41 is provided with a light-transmitting hole 411. When the detection strip 41 is slidably installed on the first sliding groove 42, the central axis of the light-transmitting hole 411 intersects perpendicularly with the central axis of the annular ring of the detection sleeve 4. A calcium fluoride window 412a is glued to one side of the light-transmitting hole 411 with sealant, and a filter 412b of a specific wavelength is glued to the other side with sealant. The light-transmitting hole 411 is sealed into a closed space by the calcium fluoride window 412a and the filter 412b, and this space is filled with nitrogen gas. On the detection sleeve 4, the filter 412b installed on each detection strip 4 has a different characteristic wavelength, corresponding to the absorption wavelength of different gases. Corresponding to the detection sleeve 4, a reference sleeve 5 is also slidably mounted on the reference sleeve 5, with a reference strip 51 corresponding to the wavelength of the detection strip 41. The reference strip 51 also has a light-transmitting hole, and the characteristic wavelength of its filter corresponds to that of the detection strip 41. However, the sealed space within the light-transmitting hole of the reference strip 51 is filled with a high concentration of target gas, and the type of target gas corresponds to the characteristic wavelength of its filter. The reference strip 51 and the detection strip 41, used for detecting the same gas, are mounted in the same phase in the circumferential direction, and the detection sleeve 4 and the reference sleeve 5 rotate synchronously under the drive of the rotation drive structure.

[0042] Both the detection sleeve 4 and the reference sleeve 5 have drive teeth on their annular end faces. The detection sleeve 4 is equipped with a first drive structure, which includes a first drive gear 61 and a first drive motor 62. The first drive motor 62 drives the first drive gear 61 to rotate, and the first drive gear 61 meshes with the drive teeth on the detection sleeve 4. Similarly, a second drive structure is provided corresponding to the reference sleeve 5. The second drive structure includes a second drive gear 71 and a second drive motor 72. The second drive motor 72 drives the second drive gear 71 to rotate, and the second drive gear meshes with the drive teeth on the reference sleeve 5. The detection sleeve 4 and the reference sleeve 5 are each connected to an angle encoder, which is connected to an intelligent sensor controller. The intelligent sensor controller is used to control the synchronous rotation of the detection sleeve and the reference sleeve.

[0043] The first drive motor 62 and the second drive motor 72 rotate synchronously under the control of the intelligent sensor controller. The intelligent sensor controller is a conventional single-chip microcomputer processor, which stores the types of gases detected corresponding to the detection strips 41 and reference strips 51 at different phase angles. While ensuring the synchronous rotation of the detection sleeve 4 and the reference sleeve 5, it also ensures the correspondence of the same set of detection strips 41 and reference strips 51. When the intelligent sensor controller controls the same set of detection strips 41 and reference strips 51 for detecting the same gas to rotate to the phase angle of the light inlet aperture 12, the detection of that gas component is achieved.

[0044] The detection strip 41 and the reference strip 51 slide in their respective grooves. When the detection strip 41 and the reference strip 51 are in the phase of the light-entry hole 12, they slide toward the light-entry hole 12, so that the central axis of the light-transmitting hole on the detection strip 41 and the reference strip 51 coincides with the central axis of the light-entry hole 12.

[0045] To drive the detection strip 41 and reference strip 51 to slide in the direction of the light-entry aperture 12, a detection strip driving structure for driving the detection strip 41 and a reference strip driving structure for driving the reference strip 51 are respectively provided near the light-entry aperture 12. The detection strip driving structure includes a first friction wheel 81 and a first friction wheel motor 82 for driving the first friction wheel 81 to rotate. The reference strip driving structure includes a second friction wheel 91 and a second friction wheel motor 92 for driving the second friction wheel 91 to rotate. The outer surface of the first friction wheel 81 contacts the outer surface of the detection strip 41 in the phase of the light-entry aperture 12, and it rotates counterclockwise (e.g., ...). Figure 1 (As shown) The detection strip 41 moves toward the light inlet hole 12 and stops when it reaches its position. A clockwise rotation resets the detection strip 41. The outer surface of the second friction wheel 91 contacts the outer surface of the reference strip 51, which is in phase with the light inlet hole 12. Its clockwise rotation (as shown) Figure 2(As shown) The reference bar 51 is moved toward the light inlet hole 12 and stops when it reaches its position. A counter-clockwise rotation causes the reference bar 51 to reset. The intelligent sensor controller is connected to the first friction wheel motor 82 and the second friction wheel motor 92 to control the rotation and stopping of the first friction wheel 81 and the second friction wheel 91.

[0046] The following describes the method of using the multi-channel pump-suction gas detector of the present invention:

[0047] S1: Turn on the air pump and maintain it for a certain period of time to ensure that the gas to be tested fills the long optical path gas chamber 1;

[0048] S2: The intelligent sensor controller controls the detection sleeve 4 and the reference sleeve 5 to rotate synchronously, so that the detection strip 41 and the reference strip 51 corresponding to the first gas to be detected are rotated to the phase of the light inlet hole 12;

[0049] S3: The intelligent sensor controller first drives the control detection strip 41 to slide toward the light inlet hole 12 and makes its light transmission hole axis coincide with the light inlet hole 12 axis;

[0050] S4: Power on the infrared light source 10, detect the intensity of the first emitted light through the infrared detector on the side of the light outlet 11, and then turn off the infrared light source;

[0051] S5: The intelligent sensor controller drives the detection strip 41 to reset, and then controls the reference strip 51 to slide toward the light inlet hole 12 and make its light transmission hole axis coincide with the light inlet hole 12 axis;

[0052] S6: Power on the infrared light source 10, detect the intensity of the second emitted light through the infrared detector on the side of the light outlet 11, and then turn off the infrared light source;

[0053] S7: The intelligent sensor controller compares the intensity of the first emitted light and the intensity of the second emitted light, and calculates the concentration of the first gas to be detected.

[0054] S8: The intelligent sensor controller then controls the detection sleeve 4 and the reference sleeve 5 to rotate synchronously, rotating the detection strip 41 and the reference strip 51 corresponding to the second gas to be detected to the phase of the light inlet hole 12. Repeat the above S3-S7, calculate the concentration of the second gas to be detected, the concentration of the third gas to be detected, etc. until all the gas components to be detected have been detected, and then turn off the gas pump to end the detection.

[0055] The method of setting a reference gas and a filter and comparing the two light intensities to detect gas concentration in the above steps is existing technology and will not be elaborated here.

[0056] The above-described device and method enable the detection of multiple gas components in a compact structure. Only a long optical path gas chamber is required, and there is no need to set up a large rotating multi-channel modulation wheel. This does not increase the size or complexity of the gas detection device, and maximizes the number of gas detection channels.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A smart sensing multi-channel pump-suction gas detector, characterized in that: It includes a long optical path air chamber, an air inlet end cap, an air outlet end cap, a detection sleeve, a reference sleeve, an infrared light source, and an intelligent sensor controller; The long-path gas chamber is a hollow cylindrical shell structure, with the inlet end cap and outlet end cap fixedly installed on the openings on the left and right sides of the long-path gas chamber, respectively. The hollow cylindrical shell of the long optical path gas chamber has light-emitting holes and light-inlet holes symmetrically arranged on the cylindrical wall about the center of the gas chamber's central axis. The central axes of the light-emitting holes and light-inlet holes are collinear and intersect perpendicularly with the central axis of the gas chamber. An infrared light source is located on the outside of the long-path gas chamber and directly opposite the light inlet; an infrared detector is located on the outside of the light outlet. The central axis of the light outlet and the light inlet divides the long optical path gas chamber into left and right parts along the length of the long optical path gas chamber. The detection sleeve and the reference sleeve are rotatably sleeved on the outside of the long optical path gas chamber through bearings, and the detection sleeve and the reference sleeve are respectively sleeved on the left and right sides of the central axis of the light outlet and the light inlet. The detection sleeve and the reference sleeve are respectively connected to a rotary encoder, and the rotary encoder is connected to the intelligent sensor controller for data connection. The intelligent sensor controller is used to control the synchronous rotation of the detection sleeve and the reference sleeve; Both the detection sleeve and the reference sleeve are circular structures with the same structural dimensions, and the detection sleeve and the reference sleeve are symmetrically installed about the central axis of the light output hole and the light input hole; The detection sleeve has multiple "convex" shaped first sliding grooves arranged in a ring array along its outer circumference. The sliding length direction defined by the first sliding groove is the same as the length axis direction of the long optical path gas chamber. A detection strip is slidably installed in each first sliding groove, and the shape of the detection strip matches the first sliding groove. The detection strip is provided with a light-transmitting hole. When the detection strip is slidably installed on the first sliding groove, the central axis of the light-transmitting hole intersects perpendicularly with the central axis of the annular ring of the detection sleeve. A calcium fluoride window is glued to one side of the light-transmitting hole with sealant, and a filter of a specific wavelength is glued to the other side with sealant. The light-transmitting hole is sealed by the calcium fluoride window and the filter to form a closed space, which is filled with nitrogen gas. On the detection sleeve, each detection strip has a filter with a different characteristic wavelength, which corresponds to the absorption wavelength of different gases. A reference strip corresponding to the wavelength of the detection strip is slidably mounted on the reference sleeve. The reference strip has a light-transmitting hole, and the characteristic wavelength of the filter on it corresponds to that of the detection strip. The sealed space inside the light-transmitting hole of the reference strip is filled with a high concentration of target gas, and the type of target gas corresponds to the characteristic wavelength of the filter on it.

2. The intelligent sensing multi-channel pump suction gas detector according to claim 1, characterized in that: A reference bar and a detection bar used to detect the same gas are installed in the same phase in the circumferential direction, and the detection sleeve and the reference sleeve rotate synchronously under the drive of the rotation drive structure.

3. The intelligent sensing multi-channel pump suction gas detector according to claim 2, characterized in that: Both the detection sleeve and the reference sleeve have drive teeth on their annular end faces. The detection sleeve is provided with a first drive structure, which includes a first drive gear and a first drive motor. The first drive motor drives the first drive gear to rotate, and the first drive gear meshes with the drive teeth on the detection sleeve. A second drive structure is provided, which corresponds to the reference sleeve. The second drive structure includes a second drive gear and a second drive motor. The second drive motor drives the second drive gear to rotate, and the second drive gear meshes with the drive teeth on the reference sleeve.

4. The intelligent sensing multi-channel pump suction gas detector according to claim 3, characterized in that: Near the light inlet aperture, there are a detection strip driving structure for driving the detection strip to slide and a reference strip driving structure for driving the reference strip to slide; the detection strip driving structure includes a first friction wheel and a first friction wheel motor for driving the first friction wheel to rotate; the reference strip driving structure includes a second friction wheel and a second friction wheel motor for driving the second friction wheel to rotate; the outer surface of the first friction wheel is in contact with the outer surface of the detection strip that is in the phase of the light inlet aperture; The outer surface of the second friction wheel contacts the outer surface of the reference strip that is in the phase of the light-entry aperture.

5. The use of a smart sensing multi-channel pump-adsorption gas detector according to claims 1-4, characterized in that: Includes the following steps S1: Turn on the air pump and maintain it for a certain period of time to ensure that the gas to be tested fills the long optical path gas chamber; S2: The intelligent sensor controller controls the detection sleeve and the reference sleeve to rotate synchronously, rotating the detection strip and the reference strip corresponding to the first gas to be detected to the phase of the light inlet hole; S3: The intelligent sensor controller first drives the control detection strip to slide toward the light inlet hole and makes the axis of the light inlet hole coincide with the axis of the light inlet hole; S4: Power on the infrared light source, detect the intensity of the first emitted light through an infrared detector on the light emission aperture side, and then turn off the infrared light source; S5: The intelligent sensor controller drives the detection strip to reset, and then controls the reference strip to slide toward the light-inlet hole and make its light-transmitting hole axis coincide with the light-inlet hole axis; S6: Power on the infrared light source, detect the intensity of the second emitted light through an infrared detector on the light emission aperture side, and then turn off the infrared light source; S7: The intelligent sensor controller compares the intensity of the first emitted light and the intensity of the second emitted light, and calculates the concentration of the first gas to be detected. S8: The intelligent sensor controller then controls the detection sleeve and reference sleeve to rotate synchronously, rotating the detection strip and reference strip corresponding to the second gas to be detected to the phase of the light inlet hole. Repeat S3-S7 above, calculate the concentration of the second gas to be detected, the concentration of the third gas to be detected, etc. until all gas components to be detected have been detected, and then turn off the gas pump to end the detection.

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