Spectrum acquisition system

Abstract

The invention provides a spectrum acquisition system. The spectrum acquisition system comprises a light source, a spectrograph, a sample pool assembly and a limiting device, and the spectrograph and the light source are oppositely arranged; the sample pool assembly comprises a cantilever and a driving device, the cantilever is provided with a plurality of stations which are linearly arranged in the preset direction, the driving device can drive the cantilever to move in the preset direction, any station can be positioned between the light source and the spectrograph, and the driving device is elastically connected with the cantilever; the driving device can drive the cantilever to abut against the limiting device through elastic force, so that at least one of the multiple stations is positioned between the light source and the spectrograph. According to the technical scheme, the problem that the measurement accuracy is affected due to the fact that the precision of a sample cell driving device of an existing spectrum collection system is not high is solved.

Description

Technical Field

[0001] The invention relates to the field of spectrum acquisition, and specifically provides a spectrum acquisition system. Background Art

[0002] A spectrometer is a scientific instrument that decomposes complex light into spectral lines. It is composed of prisms or diffraction gratings, etc., and uses the spectrum to measure the light reflected from the surface of an object. The seven colors of sunlight are the part that the naked eye can separate (visible light), but if the sunlight is decomposed by a spectrometer and arranged by wavelength, visible light only occupies a very small range in the spectrum, and the rest are spectra that the naked eye cannot distinguish, such as infrared, microwaves, ultraviolet, X-rays, etc. The elements contained in the object can be detected by capturing the light information with a spectrometer, developing it with photographic film, or displaying and analyzing it with a computerized automatic numerical display instrument. This technology is widely used in the detection of air pollution, water pollution, food hygiene, metal industry, etc.

[0003] The spectral acquisition system in the prior art usually includes a sample cell with multiple positions such as a sample position and a reference position to comprehensively analyze the properties of the sample being measured. The transmission mechanism used to drive the sample cell is mostly composed of gear racks, screws, and crank slider mechanisms, which are affected by the accuracy of the moving parts, resulting in low measurement accuracy.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0005] In order to solve the problem that the sample pool driving device of the existing spectrum acquisition system has low precision and thus affects the measurement accuracy, the present invention provides a spectrum acquisition system. The spectrum acquisition system of the present invention includes a light source, a spectrometer, a sample pool assembly and a limit device, wherein the spectrometer and the light source are arranged relative to each other; the sample pool assembly includes a cantilever and a driving device, the cantilever is provided with a plurality of stations linearly arranged along a predetermined direction, the driving device can drive the cantilever to move along the predetermined direction, so that any of the stations can be positioned between the light source and the spectrometer, and the driving device is elastically connected to the cantilever; the driving device can drive the cantilever to abut against the limit device through elastic force, so that at least one of the plurality of stations is positioned between the light source and the spectrometer.

[0006] The spectrum acquisition system of the present invention includes a light source and a spectrometer that are relatively arranged. The light emitted by the light source can pass through a sample and the like and be received by the spectrometer to form a spectral line. The sample pool assembly includes a cantilever, and a plurality of stations are linearly arranged along a predetermined direction on the cantilever. The driving device can move the cantilever along the predetermined direction, so that the plurality of stations arranged linearly can be moved to a suitable position in sequence to allow light to pass through. The driving device is elastically connected to the cantilever, and the driving device can drive the cantilever to abut against the limiting device through elastic force, so that at least one of the plurality of stations is positioned between the light source and the spectrometer. Through the above-mentioned arrangement, the limiting part ensures that one or more of the plurality of stations that require a higher positioning accuracy can be accurately positioned, thereby avoiding the error caused by the transmission components in the driving device and improving the repeatability of the station. In addition, through the arrangement of the elastic member, the influence of the vibration generated by the driving device on the positioning accuracy of the station is avoided.

[0007] In the preferred technical solution of the above-mentioned spectral acquisition system, the cantilever includes a connection portion for elastically connecting to the driving device, and the connection portion includes an active chamber; the driving device includes a driving disk that can reciprocate along the predetermined direction, and the driving disk is accommodated in the active chamber. An elastic member is provided between the driving disk and the inner wall of the active chamber, and the driving disk can compress the elastic member to generate the elastic force. Through the provision of the active chamber, a setting area is provided for the driving disk and the elastic member, so that the driving device can drive the cantilever to move through the elastic member. The elastic member is provided between the active chamber and the driving disk, and the movement of the driving disk can be transmitted to the active chamber through the elastic force generated by the elastic member, thereby driving the cantilever to move.

[0008] In the preferred technical solution of the above-mentioned spectrum acquisition system, the driving device further comprises a motor and a screw connected to the output shaft of the motor, the screw extending along the predetermined direction, and the driving disk and the screw forming a sliding connection. Through the above-mentioned setting, the cooperation of the motor and the screw makes the positioning more accurate when the cantilever is driven to move, and the driving disk can drive the cantilever to an accurate position by controlling the rotation parameters of the motor.

[0009] In the preferred technical solution of the above-mentioned spectrum acquisition system, in the predetermined direction, the driving disk includes a first side and a second side opposite to each other, the first side is provided with a first elastic member, and the second side is provided with a second elastic member. Through the provision of the two elastic members, the driving disk can drive the cantilever to reciprocate along the predetermined direction by elastic force, and make the cantilever abut against the limit device in two opposite directions for accurate positioning.

[0010] In the preferred technical solution of the above-mentioned spectrum acquisition system, the limiting device includes a limiting groove, and at least a part of the cantilever is accommodated in the limiting groove; in the predetermined direction, the inner wall of the limiting groove includes a first limiting surface and a second limiting surface relative to each other, and the driving device can drive the cantilever to abut against the first limiting surface or the second limiting surface. Through the above-mentioned arrangement, the structure of the limiting groove is relatively simple, and can directly and effectively play a limiting role on the cantilever. The first limiting surface and the second limiting surface provide two limiting action points for the cantilever, which can accurately position the two workstations.

[0011] In the preferred technical solution of the above-mentioned spectrum acquisition system, the multiple workstations include a reference position and a sample position; when the driving device drives the cantilever to abut against the first limit surface, the reference position is positioned between the light source and the spectrometer; when the driving device drives the cantilever to abut against the second limit surface, the sample position is positioned between the light source and the spectrometer. Through the above-mentioned setting, the reference position and the sample are both accurately positioned by the limit device, so that the light emitted by the light source can pass through the reference position and the sample position at a suitable angle and intensity to form an effective spectrum in the spectrometer.

[0012] In the preferred technical solution of the above-mentioned spectrum acquisition system, the spectrum acquisition system also includes an identification unit arranged on each of the workstations, and when the identification unit meets the predetermined condition, the corresponding workstation is positioned between the light source and the spectrometer; when the identification unit on the reference position meets the predetermined condition, after a predetermined time, the driving device stops driving the cantilever to move and the cantilever abuts against the first limit surface through the elastic force; or when the identification unit on the sample position meets the predetermined condition, after a predetermined time, the driving device stops driving the cantilever to move and the cantilever abuts against the second limit surface through the elastic force. Through the setting of the identification unit, the information of the workstation being driven to the appropriate position by the driving device can be obtained in time, so as to stop the driving device in time and perform spectrum acquisition at the corresponding workstation. In addition, when the identification unit on the reference position or the sample position meets the predetermined conditions, it indicates that the reference position or the sample position has reached a measurable position. On this basis, the driving device is stopped after a predetermined time, further ensuring that the cantilever can fully abut against the limit device. Even if the cantilever abuts against the limit device within a predetermined time period and the driving device is still running, the elastic force can absorb the vibration generated by the driving device and the excess pressure of the cantilever on the limit device.

[0013] In the preferred technical solution of the above-mentioned spectral acquisition system, the multiple workstations also include a standard film position and a dark current position arranged between the reference position and the sample position; when the identification unit on the standard film position or the dark current position meets the predetermined condition, the driving device stops driving the cantilever to move. Through the above-mentioned setting, the standard film position and the dark current position do not require high positioning accuracy, and can be set between the reference position and the sample position, and no limiting device is provided for limiting, thereby simplifying the structure of the present invention. In addition, since the positioning accuracy requirement is not high, the driving device can also be directly stopped when the identification unit on the standard film position or the dark current position meets the predetermined condition.

[0014] In the preferred technical solution of the above-mentioned spectrum acquisition system, the spectrum acquisition system further includes an optical coupling sensor, and the identification unit is a sensor trigger sheet, and when the sensor trigger sheet triggers the optical coupling sensor, the identification unit satisfies the predetermined condition. Through the above-mentioned setting, the optical coupling sensor can accurately identify the relative position between the workstation and itself.

[0015] In the preferred technical solution of the above-mentioned spectrum acquisition system, the spectrum acquisition system further includes a first collimator disposed between the light source and the sample pool assembly and a second collimator disposed between the sample pool assembly and the spectrometer, and the predetermined direction is perpendicular to the propagation direction of the light processed by the first collimator. Through the above-mentioned arrangement, the distance between the light source and the spectrometer can be compressed to the greatest extent, thereby improving the compactness of the spectrum acquisition system and reducing the space occupied. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a top view of an embodiment of the spectrum acquisition system of the present invention;

[0018] Figure 2 is a cross-sectional view of an embodiment of the spectrum acquisition system of the present invention at AA when the reference position is positioned between the light source and the spectrometer;

[0019] Figure 3 is a cross-sectional view of an embodiment of the spectrum acquisition system of the present invention at AA when the standard sheet position is positioned between the light source and the spectrometer;

[0020] Figure 4 is a cross-sectional view of an embodiment of the spectrum acquisition system of the present invention at AA when the dark current position is positioned between the light source and the spectrometer;

[0021] Figure 5 is a cross-sectional view of an embodiment of the spectrum acquisition system of the present invention at AA when the sample position is positioned between the light source and the spectrometer;

[0022] Figure 6 is a partial cross-sectional view of a cantilever of an embodiment of a spectrum collection system of the present invention;

[0023] Figure 7 It is a partial enlarged view of the sample cell assembly of the embodiment of the spectrum acquisition system of the present invention.

[0024] List of reference numerals:

[0025] 100. Spectral acquisition system; 10. Light source; 20. Spectrometer; 30. Sample cell assembly; 31. Cantilever; 311. Connecting part; 3111. Active chamber; 3112. First shell; 3113. Second shell; 312. Elastic member; 3121. First elastic member; 3122. Second elastic member; 32. Driving device; 321. Driving disk; 322. Motor; 323. Screw rod; 33. Reference position; 34. Standard film position; 35. Dark current position; 36. Sample position; 40. Limiting device; 41. Limiting groove; 411. First limiting surface; 412. Second limiting surface; 50. Intermediate frame; 51. First collimating mirror; 52. Second collimating mirror. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0027] It should be noted that, in the description of the present invention, the terms “first” and “second” are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In order to solve the problem that the sample pool driving device of the existing spectrum acquisition system has low precision and thus affects the measurement accuracy, the present invention provides a spectrum acquisition system 100. The spectrum acquisition system 100 of the present invention includes a light source 10, a spectrometer 20, a sample pool assembly 30 and a limiting device 40, wherein the spectrometer 20 and the light source 10 are arranged relatively; the sample pool assembly 30 includes a cantilever 31 and a driving device 32, the cantilever 31 is provided with a plurality of stations linearly arranged along a predetermined direction, the driving device 32 can drive the cantilever 31 to move along the predetermined direction, so that any station can be positioned between the light source 10 and the spectrometer 20, and the driving device 32 is elastically connected to the cantilever 31; the driving device 32 can drive the cantilever 31 to abut against the limiting device 40 through elastic force, so that at least one of the plurality of stations is positioned between the light source 10 and the spectrometer 20.

[0030] Figure 1 FIG. 1 is a top view of an embodiment of the spectrum acquisition system of the present invention. Figure 1 As shown, the spectrum acquisition system 100 of the present invention includes a light source 10, a sample cell assembly 30 and a spectrometer 20. The spectrometer 20 and the light source 10 are arranged opposite to each other, and the light source 10 can emit light toward the spectrometer 20. In one or more embodiments, the spectrum acquisition system 100 includes an intermediate frame 50. The intermediate frame 50 is provided with a coaxial first collimator 51 and a second collimator 52. The light emitted from the light source 10 enters the first collimator 51. The light collimated by the first collimator 51 can pass through one of the stations on the sample cell assembly 30 and enter the second collimator 52. The light processed by the second collimator 52 finally enters the spectrometer 20 to form a spectrum. Alternatively, the optical axes of the first collimator 51 and the second collimator 52 can also be parallel to each other or form an angle, and it is only necessary to set other optical paths for turning between the first collimator 51 and the second collimator 52. Alternatively, the setting of the intermediate frame 50 can also be cancelled, and the first collimator 51 and the second collimator 52 can be set at other suitable positions of the spectrum acquisition system 100.

[0031] Figure 2 is a cross-sectional view of an embodiment of the spectrum acquisition system of the present invention at AA when the reference position is positioned between the light source and the spectrometer; Figure 3 is a cross-sectional view of an embodiment of the spectrum acquisition system of the present invention at AA when the standard sheet position is positioned between the light source and the spectrometer; Figure 4 is a cross-sectional view of an embodiment of the spectrum acquisition system of the present invention at AA when the dark current position is positioned between the light source and the spectrometer; Figure 5 FIG. 2 is a cross-sectional view of an embodiment of the spectrum acquisition system of the present invention when the sample position is positioned between the light source and the spectrometer at AA. Figures 2 to 5As shown, the sample pool assembly 30 includes a cantilever 31 and a driving device 32. In one or more embodiments, the cantilever 31 is provided with a plurality of stations linearly arranged along a predetermined direction, and the driving device 32 can drive the cantilever 31 to move along the predetermined direction, so that any station can be positioned between the light source 10 and the spectrometer 20.

[0032] based on Figures 2 to 5 In the illustrated orientation, the predetermined direction is the left-right direction. In practical applications, the predetermined direction may be the horizontal direction, the vertical direction, or any other suitable linear direction. Figure 1 As shown, in one or more embodiments, the predetermined direction is perpendicular to the propagation direction of the light processed by the first collimator 51, so as to improve the compactness of the spectrum acquisition system 100 and reduce the space occupied. In one or more embodiments, the plurality of workstations include a reference position 33, a standard film position 34, a dark current position 35 and a sample position 36 arranged linearly from left to right. The reference position 33 and the sample position 36 are respectively arranged on opposite sides of the cantilever 31. The standard film position 34 and the dark current position 35 are arranged between the reference position 33 and the sample position 36. The reference position 33, the sample position 36 and the standard film position 34 are provided with light holes to facilitate light to pass through the sample, the standard film, the reference plate, etc., so as to generate a spectrum in the spectrometer 20. In an alternative embodiment, the setting of the reference plate can also be cancelled and the ambient air can be used as a reference. The dark current position 35 can be set at a light-proof position of the cantilever 31, so as to cut off the light provided by the light source 10 to the spectrometer 20 and collect the dark current spectrum. For example, the dark current position 35 may be disposed between the light passage holes of the standard film position 34 and the sample position 36. In an alternative embodiment, the standard film position 34 may be eliminated.

[0033] Figure 6 is a partial cross-sectional view of a cantilever of an embodiment of a spectrum collection system of the present invention; Figure 7 FIG. 2 is a partial enlarged view of a sample pool assembly of an embodiment of the spectrum acquisition system of the present invention. Figure 6 In one or more embodiments, the cantilever 31 includes a connecting portion 311 for elastically connecting to the driving device 32. The connecting portion 311 is provided with an active chamber 3111. The driving device 32 includes a driving disk 321 that can reciprocate in a predetermined direction, and the driving disk 321 is accommodated in the active chamber 3111. An elastic member 312, such as a coil spring, an air spring, etc., is provided between the driving disk 321 and the inner wall of the active chamber 3111. The driving disk 321 can compress the spring so that the spring generates an elastic force on the connecting portion 311, thereby driving the cantilever 31 to move in a predetermined direction.

[0034] In one or more embodiments, the driving device 32 further includes a motor 322 and a screw rod 323 driven by the motor 322. The driving disk 321 is sleeved on the screw rod 323 extending in a predetermined direction and forms a sliding connection with the screw rod 323, so that the driving disk 321 can reciprocate in the predetermined direction. Alternatively, the driving disk 321 can also reciprocate in other ways. Figure 7 As shown, further, the connection part 311 may include a detachable first shell 3112 and a second shell 3113, and the first shell 3112 and the second shell 3113 together enclose an active chamber 3111. Through the arrangement of the first shell 3112 and the second shell 3113, the screw rod 323 may extend through the active chamber 3111, which facilitates the installation of the drive disk 321, the elastic member 312, etc. Alternatively, the connection part 311 may also be configured in other suitable configurations.

[0035] Continue reading Figure 7 In one or more embodiments, in a predetermined direction, the driving disk 321 includes a first side and a second side that are opposite to each other. Figure 7 In the orientation shown, the first side faces right and the second side faces left. A first elastic member 3121 is provided on the first side and a second elastic member 3122 is provided on the second side, so that the elastic member 312 can provide positioning function for the cantilever 31 in two opposite directions. Alternatively, in an embodiment where only one station needs to be accurately positioned, only one elastic member 312 can be provided.

[0036] Continue reading Figures 2 to 5In one or more embodiments, the limiting device 40 is disposed on the base of the spectrum acquisition system 100 and includes a limiting groove 41. At least a portion of the cantilever 31 is accommodated in the limiting groove 41. Specifically, the portion of the cantilever 31 accommodated in the limiting groove 41 may be a connecting portion 311, which abuts against the limiting groove 41 through the connecting portion 311. The inner wall of the limiting groove 41 includes a first limiting surface 411 and a second limiting surface 412 that are opposite. The driving device 32 can drive the cantilever 31 to abut against the first limiting surface 411 and the second limiting surface 412, thereby accurately positioning two different workstations. In one or more embodiments, when the driving device 32 drives the cantilever 31 to abut against the first limit surface 411, the reference position 33 is positioned between the light source 10 and the spectrometer 20, and the spectrometer 20 can receive the light emitted from the light source 10 and passing through the reference position 33; when the driving device 32 drives the cantilever 31 to abut against the second limit surface 412, the sample position 36 is positioned between the light source 10 and the spectrometer 20, and the spectrometer 20 can receive the light emitted from the light source 10 and passing through the sample position 36. Compared with directly driving the cantilever 31 to abut against the first limit surface 411 or the second limit surface 412, the technical solution of indirectly abutting the cantilever 31 against the first limit surface 411 or the second limit surface 412 by elastic force (for example, provided by the elastic members 312 arranged on both sides of the driving disk 321) can avoid the problem that the cantilever 31 cannot accurately abut against the first limit surface 411 or the second limit surface 412 due to transmission error. In addition, the elastic force can also absorb the vibration generated when the cantilever 31 contacts the first limiting surface 411 or the second limiting surface 412 , thereby avoiding the problem that the vibration affects the positioning accuracy.

[0037] In one or more embodiments, the spectrum acquisition system 100 further includes an identification unit disposed on each workstation, and when the identification unit meets a predetermined condition, the corresponding workstation is positioned between the light source 10 and the spectrometer 20. For example, Figure 2As shown, in the process of the drive device 32 driving the cantilever 31 to move to the right, from the time when the identification unit on the reference position 33 meets the predetermined condition, after a predetermined time, the drive device 32 stops driving the cantilever 31 to move and the cantilever 31 abuts against the first limit surface 411 under the action of the elastic force applied by the elastic member 312 (exemplarily, the elastic force can be generated by the first elastic member 3121 being compressed by the displacement to the right of the driving disk 321). By setting the predetermined time, the drive device 32 stops with a delay, so that when the drive device 32 has a transmission error and causes the cantilever 31 to fail to fit on the first limit surface 411, it can continue to move toward the first limit portion. On the other hand, even if the cantilever 31 has abutted against the first limit surface 411 when the identification unit meets the predetermined condition, under the action of the elastic force, the reaction force of the first limit surface 411 can also be absorbed by the first elastic member 3121, thereby improving the positioning accuracy of the reference position 33. Due to the existence of the first limit surface 411, when the cantilever 31 is driven to move back and forth to repeatedly obtain the reference, the position of the reference position 33 can always remain consistent. Specifically, the power source in the driving device 32 can be a stepping motor, and the implementation method of stopping the driving after a predetermined time can be to increase the number of rotations based on the design value of the number of rotations, and the corresponding excess displacement of the cantilever 31 can be absorbed by compressing the elastic member 312.

[0038] Similarly, if Figure 5 As shown, when the identification unit on the sample position 36 meets the predetermined condition, the sample position 36 is positioned between the light source 10 and the spectrometer 20. Further, in the process of the driving device 32 driving the cantilever 31 to move, from the time when the identification unit on the sample position 36 meets the predetermined condition, after a predetermined time, the driving device 32 stops driving the cantilever 31 to move and the cantilever 31 abuts against the second limiting surface 412 under the action of elastic force (for example, the elastic force can be generated by the second elastic member 3122 being compressed by the driving disk 321 to the left). Through the above-mentioned setting, the sample position 36 with high positioning accuracy requirements can also be tightly abutted against the second limiting surface 412, so as to accurately position and ensure that the position of the sample position 36 remains consistent when the cantilever 31 moves back and forth to repeatedly acquire the sample spectrum.

[0039] In one or more embodiments, the acquisition of the dark current spectrum and the standard film spectrum is less affected by the position positioning accuracy of the workstation, so when the identification unit on the standard film position 34 or the dark current position 35 meets the predetermined condition, the driving device 32 stops driving the cantilever 31 to move. Alternatively, the dark current and standard film spectra can also be collected by other methods according to actual needs.

[0040] In one or more embodiments, the spectrum acquisition system 100 further includes an optical coupling sensor, and the identification unit is configured as a sensor trigger sheet. When the sensor trigger sheet triggers the optical coupling sensor, it can be considered that the identification unit meets the predetermined condition. The optical coupling sensor can be fixed to the middle frame 50 near the second collimator 52, so that whenever the optical coupling sensor is triggered by the sensor trigger sheet, the light holes on the corresponding workstation are roughly aligned with the second collimator 52, and light can pass through the light holes to reach the spectrometer 20 to generate a spectrum. Alternatively, the spectrum acquisition system 100 can also be provided with other sensors to identify the position of the workstation.

[0041] The following describes the method of using the present invention in combination with the above structure. Figure 2 First, the driving device 32 is controlled to make the cantilever 31 abut against the first limit surface 411, so as to ensure that the light hole on the reference position 33 is aligned with the first collimator 51 and the second collimator 52 with high precision, and the reference spectrum is collected. Figure 3 As shown, the driving device 32 then drives the cantilever 31 to move leftward, so that the light hole of the standard film position 34 is aligned with the first collimator 51 and the second collimator 52, and the standard film spectrum is collected. Figure 4 As shown, the cantilever 31 is then driven to move leftward so that the dark current position 35 is aligned with the first collimating mirror 51 and the second collimating mirror 52 to collect the dark current spectrum. Figure 5 As shown, the cantilever 31 is finally driven to abut against the second limit surface 412 to ensure that the light hole on the sample position 36 is aligned with the first collimator 51 and the second collimator 52 with high precision to collect the spectrum of the sample. At this point, a test sampling is completed, and then the cantilever 31 can be reversely driven to move to the right, and the cantilever 31 can be abutted against the first limit surface 411 again to perform the next set of sampling.

[0042] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A spectrum acquisition system, characterized in that: The spectral acquisition system includes a light source, a spectrometer, a sample cell assembly and a limiting device, wherein the spectrometer and the light source are arranged opposite to each other; the sample cell assembly includes a cantilever and a driving device, the cantilever is provided with a plurality of workstations linearly arranged along a predetermined direction, the driving device can drive the cantilever to move along the predetermined direction, so that any of the workstations can be positioned between the light source and the spectrometer, and the driving device is elastically connected to the cantilever; the driving device can drive the cantilever to abut against the limiting device through elastic force, so that at least one of the plurality of workstations is positioned between the light source and the spectrometer.

2. The spectrum acquisition system according to claim 1, characterized in that: The cantilever comprises a connecting portion for elastically connecting to the driving device, and the connecting portion comprises an active chamber; The driving device comprises a driving disk which can reciprocate along the predetermined direction, the driving disk is accommodated in the active chamber, an elastic member is arranged between the driving disk and the inner wall of the active chamber, and the driving disk can compress the elastic member to generate the elastic force.

3. The spectrum acquisition system according to claim 2, characterized in that: The driving device further comprises a motor and a screw connected to an output shaft of the motor, the screw extends along the predetermined direction, and the driving disc is in sliding connection with the screw.

4. The spectrum acquisition system according to claim 2, characterized in that: In the predetermined direction, the driving plate includes a first side and a second side opposite to each other, the first side is provided with a first elastic member, and the second side is provided with a second elastic member.

5. The spectrum acquisition system according to any one of claims 1 to 4, characterized in that: The limiting device comprises a limiting groove, and at least a part of the cantilever is accommodated in the limiting groove; In the predetermined direction, the inner wall of the limiting groove includes a first limiting surface and a second limiting surface that are opposite to each other, and the driving device can drive the cantilever to abut against the first limiting surface or the second limiting surface.

6. The spectrum acquisition system according to claim 5, characterized in that: The plurality of workstations include a reference position and a sample position; When the driving device drives the cantilever to abut against the first limiting surface, the reference position is positioned between the light source and the spectrometer; When the driving device drives the cantilever to abut against the second limiting surface, the sample position is positioned between the light source and the spectrometer.

7. The spectrum acquisition system according to claim 6, characterized in that: The spectrum acquisition system further comprises an identification unit disposed on each of the workstations, and when the identification unit meets a predetermined condition, the corresponding workstation is positioned between the light source and the spectrometer; From the time when the identification unit on the reference position meets the predetermined condition, after a predetermined time, the driving device stops driving the cantilever to move and the cantilever abuts against the first limit surface through the elastic force; or When the identification unit on the sample position meets the predetermined condition, after the predetermined time has passed, the driving device stops driving the cantilever to move and the cantilever abuts against the second limit surface through the elastic force.

8. The spectrum acquisition system according to claim 7, characterized in that: The plurality of workstations further include a standard film position and a dark current position disposed between the reference position and the sample position; When the identification unit on the standard film position or the dark current position meets the predetermined condition, the driving device stops driving the cantilever to move.

9. The spectrum acquisition system according to claim 7, characterized in that: The spectrum acquisition system further includes an optical coupling sensor, and the identification unit is a sensor triggering piece. When the sensor triggering piece triggers the optical coupling sensor, the identification unit satisfies the predetermined condition.

10. The spectrum acquisition system according to claim 1, characterized in that: The spectrum collection system further comprises a first collimator disposed between the light source and the sample cell assembly and a second collimator disposed between the sample cell assembly and the spectrometer, and the predetermined direction is perpendicular to the propagation direction of the light processed by the first collimator.

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