Odorant Spectrometer

Abstract

This invention relates to an odorant spectrometer, belonging to the field of analytical instrument technology. It includes a spectrometer body and a cover, with the cover detachably mounted on the spectrometer body. The spectrometer also includes a support frame, a housing, a first rotating shaft, a turntable, and sample gas chambers. Two support frames are provided, installed front and rear on opposite sides of the bottom of the spectrometer body. The housing is mounted on the bottom of the spectrometer body. This invention overcomes the limitations of traditional single-chamber sequential detection by integrating four sample gas chambers into the spectrometer body, enabling simultaneous acquisition and analysis of spectral data from multiple concentrations of samples. This significantly improves detection efficiency and allows for intuitive comparison of the spectral characteristics of different odorant concentrations. It ensures that each gas chamber forms a complete detection optical path with the optical system of the spectrometer body when it reaches the detection station, maintaining the continuity and accuracy of the spectral analysis path.

Description

Technical Field

[0001] This utility model belongs to the field of analytical instrument technology, specifically relating to an odorant spectrometer. Background Technology

[0002] Spectroscopic analysis is based on the absorption, emission, or scattering characteristics of light by substances. By detecting the spectral signal after the interaction between light and matter, the composition, concentration, and structure of the substance can be analyzed. Different molecules have different vibrational and rotational energy levels of chemical bonds, which will produce characteristic responses to light of specific wavelengths, thus forming a "molecular fingerprint" to achieve qualitative and quantitative analysis.

[0003] In liquefied petroleum gas (LPG) applications, the precise addition of odorants is a crucial step in ensuring gas safety. Adding odorants such as tetrahydrothiophene to LPG can provide timely warnings through odor in the event of a leak. To ensure that the odorant concentration is within the effective warning range, a spectrometer is used for concentration detection. During the detection process, light emitted from the spectrometer's light source passes through the sample gas chamber and is received by the detector, enabling quantitative determination of the odorant concentration.

[0004] A related technology (Chinese Patent No. CN201569493U) discloses a spectrometer, including a slit, a collimating lens, a plane grating, a focusing lens, and a detector. The collimating lens is located on the incident light path through the slit; it can be an independent lens or a reflecting mirror. The grating is located on the reflected light path of the collimating lens. The focusing lens is located on the reflected light path of the grating, and the acquisition of the spectral signal is accomplished by the detector. By dispersing light into many beams according to wavelength through the grating, and then projecting the light onto the CCD detector through the focusing lens, and simultaneously adjusting the grating to a certain angle using a stepper motor, light of different wavelength ranges can be imaged onto the CCD detector, thus realizing a wide-spectrum, high-resolution spectrometer.

[0005] In existing spectral analysis techniques, a single detection can only analyze the odorant in a single concentration sample chamber. To conduct a control experiment to study the spectral response characteristics of different concentrations of odorant, it is necessary to repeatedly change the sample chamber and detect different concentrations of samples. This process involves cumbersome repeated disassembly and assembly of sample chambers and parameter calibration, resulting in low detection efficiency. Furthermore, due to the lack of a parallel detection mechanism, it is impossible to simultaneously acquire and visually compare spectral data from multiple concentrations, making it difficult to quickly obtain quantitative differences in the spectral characteristics of odorant at different concentrations. Utility Model Content

[0006] To address the shortcomings of existing spectrometers in comparative experiments studying the spectral response characteristics of odorants at different concentrations, which involve time-consuming and labor-intensive repeated disassembly and assembly of sample chambers and parameter calibration, and lack a parallel detection mechanism for simultaneous acquisition and direct comparison of spectral data from multiple concentrations, making it difficult to quickly identify differences in spectral characteristics at each concentration, this invention provides an odorant spectrometer. Breaking away from the traditional single-chamber, sequential detection method, it enables simultaneous acquisition and analysis of spectral data from multiple concentrations, significantly improving detection efficiency. Furthermore, by comparing the spectral response curves of different concentration chambers in parallel, it can intuitively present the differences in spectral characteristics of odorants at various concentrations, effectively meeting the needs of the gas detection field for efficient analysis of multiple concentration samples. The specific technical solution is as follows: An odorant spectrometer includes a main body and a cover, the cover being detachably mounted on the main body. It also includes a support frame, a housing, a first rotating shaft, a turntable, and sample gas chambers. Two support frames are provided, respectively mounted on the front and rear sides of the bottom of the main body. The housing is mounted on the bottom of the main body. The first rotating shaft is rotatably mounted vertically within the housing, with its top end extending upwards into the inner cavity of the main body. The turntable is fixedly mounted on the top end of the first rotating shaft. Four sets of sample gas chambers are arranged equidistantly along the circumferential direction of the upper surface of the turntable. One set of sample gas chambers is filled with nitrogen as a zero-gas chamber, while the other three sets are filled with odorant samples of different concentrations.

[0007] The above technical solution further includes: a first incomplete gear, an extension rod, a second rotating shaft, a second incomplete gear, and a drive pin. The first incomplete gear is fixedly mounted on the first rotating shaft, and the first incomplete gear has four sets of gaps evenly spaced along the circumference. The extension rod is fixedly mounted on the first rotating shaft, and the extension rod is located above the first incomplete gear. The second rotating shaft is rotatably disposed in the inner cavity of the housing in a vertical direction. The second incomplete gear is fixedly mounted on the second rotating shaft, and the teeth of the second incomplete gear mesh with the teeth of the first incomplete gear. The drive pin is fixedly and vertically mounted on the upper surface of the second incomplete gear. The free end of the extension rod extends above the second incomplete gear, and the drive pin can rotate the extension rod in the corresponding direction by rotating it one revolution.

[0008] In the above technical solution, the drive pin rotates clockwise one revolution to drive the extension rod to rotate counterclockwise by °.

[0009] In the above technical solution, a drive assembly is provided at the second rotating shaft. The drive assembly includes a drive shaft, a first bevel gear, and a second bevel gear. The drive shaft passes through the housing sidewall in a horizontal direction and is rotatably connected to it. The first bevel gear is installed at the right end of the drive shaft. The second bevel gear is fixedly installed on the second rotating shaft, and the second bevel gear meshes with the first bevel gear.

[0010] In the above technical solution, the first bevel gear and the second bevel gear have the same size specifications.

[0011] In the above technical solution, the drive assembly further includes a handwheel and a lever, wherein the handwheel is fixedly installed on the left end of the drive shaft; and the lever is fixedly installed on the side wall of the handwheel.

[0012] In the above technical solution, a quadrangular prism is fixedly installed in the middle of the upper surface of the turntable, and four sets of mirror bodies are evenly arranged on the side wall of the quadrangular prism.

[0013] In the above technical solution, four sets of base frames are equidistantly arranged along the circumferential direction on the upper surface of the turntable.

[0014] In the above technical solution, the size of each placement base is adapted to the size of the sample gas chamber.

[0015] In the above technical solution, the sample gas chamber is made of a transparent material with high light transmittance and optical neutrality.

[0016] Compared with the prior art, the odorant spectrometer of this invention has the following advantages: I. To address the problems of low detection efficiency and difficulty in data comparison in the study of the spectral response characteristics of multi-concentration odorants using existing spectrometers, this invention proposes a multi-chamber parallel detection structure. By integrating four sample chambers into the main body of the spectrometer, one chamber is configured as a zero chamber as a reference, while the other three chambers are loaded with odorant samples of different concentrations. This structure breaks through the traditional single-chamber sequential detection method, enabling simultaneous acquisition and analysis of spectral data from multiple concentration samples, significantly improving detection efficiency. Simultaneously, by comparing the spectral response curves of different concentration chambers in parallel, the differences in spectral characteristics of each concentration of odorant can be intuitively presented, effectively meeting the needs of the gas detection field for efficient analysis of multiple concentration samples. II. Through the transmission design, this utility model enables the drive shaft to drive the turntable to produce a precise 90-degree angular displacement every time it completes one rotation. This transmission mechanism ensures that the four sets of sample gas chambers can be rotated to the detection position in sequence and accurately. A single rotation can accurately position the sample chambers, avoiding repeated adjustments. Within the action cycle of one rotation of the drive shaft, the sample gas chambers arrive at the detection position in sequence in a 90-degree intermittent step manner, realizing efficient and orderly detection of multi-chamber samples. Third, in this utility model, a handwheel and a lever are provided at the free end of the drive shaft, which makes it easier to manually drive the drive shaft to rotate circumferentially. At the same time, the lever can also clearly show the position of the drive shaft after one rotation, thus serving as a position indicator for the drive shaft. IV. In this utility model, when the second incomplete gear drives the drive pin to rotate, the drive extension rod drives the first incomplete gear to rotate synchronously. When the smooth sidewall of the second incomplete gear contacts the sidewall of the first incomplete gear, the first incomplete gear is kept in a stable position and will not continue to rotate. This achieves stability after the first incomplete gear rotates, thus ensuring the stability of the turntable and the sample gas chamber. V. In this utility model, a base frame corresponding to multiple sample gas chambers is provided above the turntable, which can ensure that the relative displacement of the sample gas chambers on the turntable is avoided during the rotation of the turntable, and ensure that the sample gas chambers are always stably located on the upper surface of the turntable under the limiting action of the base frame. VI. This utility model is equipped with four sets of mirrors that rotate synchronously with the turntable. When the turntable drives the four sets of sample gas chambers to rotate and switch positions, the mirrors maintain the positional correspondence with the sample gas chambers to ensure that when each gas chamber rotates to the detection position, the mirrors at the corresponding positions can form a complete detection optical path with the optical system of the main body of the spectrometer, thus maintaining the continuity and accuracy of the spectral analysis path. VII. This utility model, through the meshing transmission design of the first bevel gear and the second bevel gear, sets the drive end on the side wall of the main body of the spectrometer, breaking through the layout limitations of the traditional bottom drive and realizing the optimized configuration of the horizontal operation interface; this structure allows the operator to apply driving force directly from the side of the equipment, avoiding the inconvenience of having to go deep into the bottom of the equipment to operate in the traditional design, and significantly improving the convenience of human-machine interaction. In summary, the beneficial effects of this utility model are as follows: By integrating a multi-chamber parallel detection structure with four sample gas chambers into the main body of the spectrometer, it overcomes the limitations of traditional single-chamber sequential detection, achieving synchronous acquisition and analysis of spectral data for multi-concentration samples, significantly improving detection efficiency, and visually presenting the differences in spectral characteristics of odorants at various concentrations through parallel comparison; the transmission design enables the drive shaft to drive the turntable to produce a precise 90-degree angular displacement, ensuring that the four sample gas chambers rotate sequentially and accurately to the detection position, avoiding repeated adjustments, and achieving efficient and orderly detection of multi-chamber samples; the handwheel and lever at the free end of the drive shaft facilitate manual circumferential rotation of the drive shaft, while the lever clearly indicates the rotation position of the drive shaft, providing precise indication; When the two incomplete gears drive the drive pin to rotate, the drive extension rod drives the first incomplete gear to rotate synchronously. When the smooth sidewall of the second incomplete gear contacts the sidewall of the first incomplete gear, the first incomplete gear is kept stable, thus ensuring the stability of the turntable and sample gas chamber. A base frame corresponding to multiple sample gas chambers is set above the turntable to avoid relative displacement of the sample gas chambers on the turntable, so that they are stably placed on the upper surface of the turntable under the limiting action. Four sets of mirrors are configured to rotate synchronously with the turntable. When the turntable drives the four sets of sample gas chambers to rotate and switch positions, by maintaining the positional correspondence with the sample gas chambers, it is ensured that each gas chamber forms a complete detection optical path with the optical system of the spectrometer body when it rotates to the detection position, thus maintaining the continuity and accuracy of the spectral analysis path. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main body of the spectrometer of this utility model; Figure 2 This is a schematic diagram of the structure of the cover of this utility model; Figure 3 This is a front sectional view of the casing of this utility model; Figure 4 This is a schematic diagram of the structure of the turntable of this utility model; Figure 5 This is a schematic diagram of the optical path of this utility model; Figure 6 This is a schematic diagram of the structure of the first bevel gear of this utility model; Figure 7 This is a front view of the first rotating shaft of this utility model; Figure 8 This is a top view of the first incomplete gear of this utility model; Figure 9 This is a schematic diagram of the structure of the drive pin of this utility model; Figures 1 to 9In the middle, 1. the main body of the spectrometer, 2. the cover, 3. the supporting base, 4. the shell, 5. the first rotating shaft, 6. the turntable, 7. the sample gas chamber, 8. the first incomplete gear, 9. the extension rod, 10. the second rotating shaft, 11. the second incomplete gear, 12. the drive pin, 13. the drive shaft, 14. the first bevel gear, 15. the second bevel gear, 16. the handwheel, 17. the handle, 18. the quadrangular prism, 19. the mirror body, 20. the placement base. Detailed Implementation

[0018] The following are specific implementation cases and appendices. Figures 1 to 9 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0019] An odorant spectrometer includes a main body 1 and a cover 2, the cover 2 being detachably mounted on the main body 1. It also includes a support frame 3, a housing 4, a first rotating shaft 5, a turntable 6, and sample gas chambers 7. Two support frames 3 are provided, installed front and rear on opposite sides of the bottom of the main body 1. The housing 4 is mounted on the bottom of the main body 1. The first rotating shaft 5 is rotatably mounted vertically within the housing 4, with its top end extending upwards into the inner cavity of the main body 1. The turntable 6 is fixedly mounted on the top end of the first rotating shaft 5. Four sets of sample gas chambers 7 are provided, equidistantly arranged circumferentially along the upper surface of the turntable 6. One set of sample gas chambers 7 is filled with nitrogen as a zero-gas chamber, while the other three sets are filled with odorant samples of different concentrations.

[0020] This invention constructs a multi-chamber parallel detection architecture, integrating four sets of sample gas chambers (7 chamber units) within the main body 1 of the spectrometer. One set serves as a zero chamber to provide a detection benchmark, while the remaining three sets respectively accommodate odorant samples of different concentration gradients. Compared to the traditional single-chamber sequential detection mode, this structure can simultaneously complete the spectral data acquisition and analysis of multiple concentration samples, significantly improving detection efficiency. By comparing the spectral response curves of different concentration chambers in parallel, the quantitative relationship between odorant concentration and spectral characteristics can be clearly demonstrated, accurately meeting the needs of the gas detection field for rapid and efficient analysis of multiple concentration samples.

[0021] This solution also includes: a first incomplete gear 8, an extension rod 9, a second rotating shaft 10, a second incomplete gear 11, and a drive pin 12. The first incomplete gear 8 is fixedly mounted on the first rotating shaft 5, and the first incomplete gear 8 is provided with four sets of gaps at equal intervals along the circumference; the extension rod 9 is fixedly mounted on the first rotating shaft 5, and the extension rod 9 is located above the first incomplete gear 8; the second rotating shaft 10 is rotatably disposed in the inner cavity of the housing 4 in the vertical direction; the second incomplete gear 11 is fixedly mounted on the second rotating shaft 10, and the teeth of the second incomplete gear 11 are meshed with the teeth of the first incomplete gear 8; the drive pin 12 is fixed and vertically mounted on the upper surface of the second incomplete gear 11; wherein, the free end of the extension rod 9 extends above the second incomplete gear 11, and the drive pin 12... A full rotation of the driving pin 12 can actuate the extension rod 9 to rotate in the corresponding direction. When the second incomplete gear 11 drives the driving pin 12 to rotate, the driving extension rod 9 drives the first incomplete gear 8 to rotate synchronously. When the smooth sidewall of the second incomplete gear 11 contacts the sidewall of the first incomplete gear 8, the first incomplete gear 8 is kept in a stable position and will not continue to rotate, thus achieving stability after the first incomplete gear 8 rotates, ensuring the stability of the turntable 6 and the sample gas chamber 7. A full clockwise rotation of the driving pin 12 drives the extension rod 9 to rotate 90° counterclockwise. Both the second incomplete gear 11 and the first incomplete gear 8 are commercially available incomplete gears. The number of gears on their outer walls and the positional ratio between each tooth are shown in the appendix to this application. Figure 7 As shown, it is sufficient to meet the requirements of this application; specific parameters are not limited or elaborated. During testing, as the second incomplete gear 11 rotates clockwise, the drive pin 12 on the second incomplete gear 11 causes the extension rod 9 to rotate 90 degrees counterclockwise simultaneously. This causes the first incomplete gear 8, the first rotating shaft 5, and the turntable 6 to rotate 90 degrees counterclockwise simultaneously until the teeth on the outer wall of the second incomplete gear 11 disengage from the teeth on the outer wall of the first incomplete gear 8. This allows the smooth sidewall of the second incomplete gear 11 to make contact with the tooth gaps on the sidewall of the first incomplete gear 8. At this point, the position of the first incomplete gear 8 stabilizes and it stops rotating. Thus, the four sets of sample gas chambers 7 on the turntable 6 complete a 90-degree rotation, achieving a change in position, thereby enabling the sequential testing of the four sets of sample gas chambers 7.

[0022] This invention utilizes a precision transmission system to convert the circular motion of the drive shaft 13 into precise angular displacement control of the turntable 6. Through this mechanical transmission ratio design, each complete rotation of the drive shaft 13 drives the turntable 6 to produce a fixed 90-degree angular displacement. This transmission scheme ensures that the four sample gas chambers 7 can be precisely rotated to the detection station in a predetermined order, effectively avoiding errors and time losses caused by multiple adjustments. Within a single rotation cycle of the drive shaft 13, the sample gas chambers 7 arrive at the detection point sequentially in 90-degree steps, thereby realizing an efficient, orderly, and automated detection process for multi-chamber samples.

[0023] A drive assembly is provided at the second rotating shaft 10. The drive assembly includes a drive shaft 13, a first bevel gear 14, and a second bevel gear 15. The drive shaft 13 passes through the housing 4 horizontally and is rotatably connected to the side wall. The first bevel gear 14 is installed at the right end of the drive shaft 13. The second bevel gear 15 is fixedly installed on the second rotating shaft 10 and meshes with the first bevel gear 14. The first bevel gear 14 and the second bevel gear 15 are commercially available bevel gears that can mesh. Their meshing achieves a change in the transmission direction. This is existing technology and is sufficient to meet the usage requirements of this application. It will not be elaborated or limited here. The first bevel gear 14 and the second bevel gear 15 are the same size and specifications, so as to ensure that when the first bevel gear 14 rotates one revolution, it can drive the second bevel gear 15 to rotate 90 degrees synchronously.

[0024] This utility model, through the meshing transmission design of the first bevel gear 14 and the second bevel gear 15, sets the drive end at the side wall of the main body 1 of the spectrometer, breaking through the layout limitations of the traditional bottom drive and realizing the optimized configuration of the horizontal operation interface; this structure allows the operator to apply driving force directly from the side of the equipment, avoiding the inconvenience of having to go deep into the bottom of the equipment to operate in the traditional design, and significantly improving the convenience of human-machine interaction.

[0025] The drive assembly also includes a handwheel 16 and a lever 17. The handwheel 16 is fixedly installed on the left end of the drive shaft 13; the lever 17 is fixedly installed on the side wall of the handwheel 16. In this invention, the handwheel 16 and lever 17 are provided at the free end of the drive shaft 13, which makes it easier to manually drive the drive shaft 13 to rotate circumferentially. At the same time, the lever 17 can clearly show the position of the drive shaft 13 after one rotation, serving as a position indicator for the drive shaft 13. By driving the lever 17, the handwheel 16 and the drive shaft 13 rotate synchronously, so that the first bevel gear 14 drives the second bevel gear 15 to rotate. Since the first bevel gear 14 and the second bevel gear 15 have the same specifications, when the first bevel gear 14 rotates one rotation, the second bevel gear 15 rotates one clockwise rotation, that is, ensuring that the second bevel gear 15 drives the second rotating shaft 10, the second incomplete gear 11, and the drive pin 12 to rotate synchronously one clockwise rotation.

[0026] A quadrangular prism 18 is fixedly installed in the middle of the upper surface of the turntable 6. Four sets of mirrors 19 are evenly arranged on the side wall of the quadrangular prism 18. This utility model is configured with four sets of mirrors 19 that rotate synchronously with the turntable 6. When the turntable 6 drives the four sets of sample gas chambers 7 to rotate and switch positions, the mirrors 19 maintain the positional correspondence with the sample gas chambers 7 to ensure that when each gas chamber rotates to the detection position, the mirrors 19 at the corresponding positions can form a complete detection optical path with the optical system of the spectrometer body 1, thus maintaining the continuity and accuracy of the spectral analysis path.

[0027] Four sets of placement bases 20 are equidistantly arranged along the circumference of the upper surface of the turntable 6. The size of each placement base 20 is adapted to the size of the sample gas chamber 7. In this utility model, the placement bases 20 corresponding to multiple sample gas chambers 7 are arranged above the turntable 6, which can ensure that the relative displacement of the sample gas chambers 7 on the turntable 6 is avoided during the rotation of the turntable 6, and ensure that the sample gas chambers 7 are always stably located on the upper surface of the turntable 6 under the limiting action of the placement bases 20.

[0028] Furthermore, the sample chamber 7 is made of a transparent material with high light transmittance and optical neutrality, ensuring that the detection optical path can penetrate the chamber to perform spectral analysis of the internal odorant, while maintaining the optical properties such as wavelength, intensity, and phase of the light, thus preserving the stability of the light path reflection and transmission and the integrity of the detection and analysis. This material is a standard model available on the market, and meeting the above optical performance requirements is sufficient; specific specifications are not elaborated or limited.

[0029] It is worth noting that in this application, the main body 1 of the spectrometer is prior art, and its internal cavity is equipped with various components for gas detection. These components only need to meet the spectral requirements of the detected gas and are of a general type; therefore, no further elaboration or limitation is required here. The analytical principle of the spectrometer used for odorants is the same as the principle of spectral analysis of substances in the existing market. For example, the spectroscopic analysis principle in this application is the same as the analytical method in Chinese Patent Publication No. CN201569493U, and it can penetrate the sample gas chamber 7 in this application, with its detection direction along the attached... Figure 5 The arrow points in the direction required for spectral detection of the gas within the sample chamber 7. Since this application does not improve the principle of spectral detection, this is existing technology, and commercially available technology can be used; therefore, it will not be elaborated upon or limited here. The mirror 19 is part of the optical path detection component of the main body 1 of the spectrometer. In this embodiment, it is a focusing lens used to ultimately output the optical path to the detector of the main body 1 of the spectrometer. This is existing technology, and as long as it meets the usage requirements, it will not be elaborated upon or limited in this invention.

[0030] The working principle of the odorant spectrometer in this embodiment is as follows: One set of sample gas chambers 7 is filled with nitrogen gas, and this set of sample gas chambers 7 is used as the zero gas chamber. The other three sets of sample gas chambers 7 are filled with three sets of odorants to be tested with different concentrations. The four sets of sample gas chambers 7 are then placed into the four sets of placement bases 20 on the turntable 6 to complete the sample placement preparation work. During the testing operation, the drive lever 17 drives the handwheel 16 to rotate synchronously with the drive shaft 13. The circumferential rotation is transmitted in a 1:1 ratio through the equal-specification transmission pairs of the first bevel gear 14 and the second bevel gear 15. When the first bevel gear 14 completes one rotation, the second bevel gear 15 synchronously drives the second rotating shaft 10, the second incomplete gear 11, and the drive pin 12 assembly to rotate clockwise one rotation. During this process, the drive pin 12 on the second incomplete gear 11 drives the extension rod 9 to rotate counterclockwise by 90° through tooth meshing, thereby driving the first incomplete gear 8, the first rotating shaft 5, and the turntable 6 assembly to synchronously complete a 90° angular displacement. When the second incomplete gear 11 rotates to the point where its smooth outer wall forms a surface contact with the tooth gap of the first incomplete gear 8, the transmission pair disengages. The first incomplete gear 8 locks its current position under the limiting action of the second incomplete gear 11, ensuring that the four sets of sample gas chambers 7 on the turntable 6 accurately complete the 90° position switching and realize the sequential testing function of multiple gas chambers. In this invention, by integrating a multi-chamber parallel detection structure with four sample gas chambers 7 into the main body 1 of the spectrometer, the limitations of traditional single-chamber sequential detection are overcome, enabling synchronous acquisition and analysis of spectral data of multi-concentration samples, significantly improving detection efficiency. Furthermore, it allows for intuitive presentation of the spectral characteristics differences of odorant at various concentrations through parallel comparison. The transmission design enables the drive shaft 13 to drive the turntable 6 to produce a precise 90-degree angular displacement, ensuring that the four sample gas chambers 7 rotate sequentially and accurately to the detection position, avoiding repeated adjustments and achieving efficient and orderly detection of multi-chamber samples. The handwheel 16 and lever 17 at the free end of the drive shaft 13 facilitate manual circumferential rotation of the drive shaft 13, while the lever 17 clearly indicates the rotation position of the drive shaft 13, providing precise indication. The second incomplete gear 11... When the drive pin 12 rotates, the drive extension rod 9 drives the first incomplete gear 8 to rotate synchronously. When the smooth sidewall of the second incomplete gear 11 contacts the sidewall of the first incomplete gear 8, the first incomplete gear 8 is kept stable, thereby ensuring the stability of the turntable 6 and the sample gas chamber 7. A mounting base 20 corresponding to multiple sample gas chambers 7 is set above the turntable 6 to avoid relative displacement of the sample gas chambers 7 on the turntable 6, so that they are stably positioned on the upper surface of the turntable 6 under the limiting action. Four sets of mirror bodies 19 are configured to rotate synchronously with the turntable 6. When the turntable 6 drives the four sets of sample gas chambers 7 to rotate and switch positions, by maintaining the positional correspondence with the sample gas chambers 7, it is ensured that each gas chamber forms a complete detection optical path with the optical system of the spectrometer body 1 when it rotates to the detection position, thus maintaining the continuity and accuracy of the spectral analysis path.

[0031] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0032] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0033] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0034] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0035] Unless otherwise stated, the term "multiple" means two or more.

[0036] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0037] The term "and / or" describes the relationship between objects, indicating that there can be three relationships. For example, A and / or B means: A or B, or A and B.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An odorant spectrometer, comprising a spectrometer body (1) and a cover (2), wherein the cover (2) is detachably mounted on the spectrometer body (1), characterized in that: Also includes: Support base (3), two support bases (3) are provided, and the two support bases (3) are respectively installed on the front and rear sides of the bottom end of the spectrometer body (1); Housing (4), the housing (4) is installed at the bottom of the main body (1) of the spectrometer; The first rotating shaft (5) is rotatably disposed in the inner cavity of the housing (4) in the vertical direction, and the top end of the first rotating shaft (5) extends upward into the inner cavity of the main body (1) of the spectrometer; Turntable (6), which is fixedly installed on the top of the first rotating shaft (5); The sample gas chamber (7) is provided in four groups, and the four groups of sample gas chambers (7) are arranged equidistantly along the upper surface of the turntable (6). One group of sample gas chambers (7) is filled with nitrogen as a zero gas chamber, and the other three groups of sample gas chambers (7) are filled with different concentrations of odorant samples to be tested.

2. The odorant spectrometer according to claim 1, characterized in that: Also includes: The first incomplete gear (8) is fixedly installed on the first rotating shaft (5), and the first incomplete gear (8) is provided with four sets of gaps at equal intervals along the circumference. Extension rod (9), which is fixedly installed on the first rotating shaft (5) and is located above the first incomplete gear (8); The second rotating shaft (10) is rotatably disposed in the inner cavity of the housing (4) in the vertical direction; The second incomplete gear (11) is fixedly mounted on the second rotating shaft (10), and the teeth of the second incomplete gear (11) mesh with the teeth of the first incomplete gear (8). Drive pin (12), which is fixed and vertically mounted on the upper surface of the second incomplete gear (11); The free end of the extension rod (9) extends above the second incomplete gear (11), and the drive pin (12) can rotate the extension rod (9) in the corresponding direction by rotating one revolution.

3. The odorant spectrometer according to claim 2, characterized in that: The drive pin (12) rotates clockwise one revolution, driving the extension rod (9) to rotate counterclockwise 90°.

4. The odorant spectrometer according to claim 2, characterized in that: A drive assembly is provided at the second rotating shaft (10), the drive assembly comprising: A drive shaft (13) is horizontally connected to the side wall of the housing (4); The first bevel gear (14) is mounted on the right end of the drive shaft (13); The second bevel gear (15) is fixedly mounted on the second rotating shaft (10), and the second bevel gear (15) meshes with the first bevel gear (14).

5. The odorant spectrometer according to claim 4, characterized in that: The first bevel gear (14) and the second bevel gear (15) have the same size specifications.

6. The odorant spectrometer according to claim 4, characterized in that: The driving component also includes: Handwheel (16), the handwheel (16) is fixedly installed on the left end of the drive shaft (13); Hand lever (17), which is fixedly installed on the side wall of the handwheel (16).

7. The odorant spectrometer according to claim 1, characterized in that: A quadrangular prism (18) is fixedly installed in the middle of the upper surface of the turntable (6), and four sets of mirror bodies (19) are evenly arranged on the side wall of the quadrangular prism (18).

8. The odorant spectrometer according to claim 1, characterized in that: The turntable (6) has four sets of base frames (20) arranged at equal intervals along the circumference on its upper surface.

9. The odorant spectrometer according to claim 8, characterized in that: The size of each of the placement bases (20) is adapted to the size of the sample gas chamber (7).

10. The odorant spectrometer according to claim 1, characterized in that: The sample air chamber (7) is made of a transparent material with high light transmittance and optical neutrality.

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