Spectra acquisition system

Abstract

The application provides a spectrum acquisition system. The spectrum acquisition system comprises a light source, a spectrometer, a sample cell assembly and a limiting device, wherein the spectrometer and the light source are oppositely arranged; the sample cell assembly comprises a cantilever and a driving device, the cantilever is provided with a plurality of workstations arranged linearly along a predetermined direction, the driving device can drive the cantilever to move along the predetermined direction, so that any workstation can be positioned between the light source and the spectrometer, and the driving device is elastically connected with the cantilever; the driving device can drive the cantilever to abut against the limiting device through an elastic force, so that at least one of the plurality of workstations is positioned between the light source and the spectrometer. The technical scheme aims to solve the problem that the precision of the sample cell driving device of the existing spectrum acquisition system is not high, thereby affecting the measurement accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of spectrum acquisition, and specifically provides a spectrum acquisition system. BACKGROUND

[0002] A spectrometer is a scientific instrument that decomposes complex light into spectral lines, which is composed of prisms or diffraction gratings, and uses light spectrum to measure the light reflected by the surface of an object. The seven colors of sunlight are the part that the naked eye can distinguish (visible light), but if the sunlight is decomposed by a spectrometer and arranged by wavelength, visible light only occupies a small range of the spectrum, and the rest is invisible spectrum such as infrared, microwave, ultraviolet, X-ray, etc. Through the capture of light information by the spectrometer, the development of photographic film, or computerized automatic display of numerical instruments, the instrument displays and analyzes to measure the elements contained in the object. This technology is widely used in the detection of air pollution, water pollution, food hygiene, metal industry, etc.

[0003] The spectrum acquisition system in the prior art usually includes a sample cell integrated with multiple stations such as a sample station and a reference station, to comprehensively analyze the properties of the measured sample. The transmission mechanism for driving the sample cell is usually composed of gear racks, lead screws, and crank slider mechanisms, etc. The precision of the moving parts affects the measurement accuracy.

[0004] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0005] In order to solve the problem of low precision of the sample cell driving device of the existing spectrum acquisition system, which affects the measurement accuracy, the present application provides a spectrum acquisition system. The spectrum acquisition system of the present application comprises 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 comprises a cantilever and a driving device, the cantilever is provided with a plurality of stations arranged linearly in a predetermined direction, the driving device can drive the cantilever to move in the predetermined direction, so that any station can be positioned between the light source and the spectrometer, and the driving device is elastically connected with the cantilever; the driving device can drive the cantilever to abut against the limiting device by 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 application comprises a light source and a spectrometer arranged oppositely, the light emitted by the light source can pass through a sample and be received by the spectrometer to form a spectrum line. The sample cell assembly comprises a cantilever, a plurality of workstations are linearly arranged on the cantilever in a predetermined direction, and a driving device can move the cantilever in the predetermined direction, so that the plurality of workstations in linear arrangement can be moved to a suitable position in sequence to make the light pass through. The driving device is elastically connected with the cantilever, and the driving device can drive the cantilever to abut against a limiting device through an elastic force, so that at least one of the plurality of workstations is positioned between the light source and the spectrometer. Through the above arrangement, the limiting part ensures that one or more of the plurality of workstations which require high positioning accuracy can be accurately positioned, avoids the error caused by the transmission parts in the driving device, and improves the repeat accuracy of the workstation. In addition, through the arrangement of the elastic member, the influence of the vibration of the driving device on the positioning accuracy of the workstation is avoided.

[0007] In the preferred technical scheme of the above spectrum acquisition system, the cantilever comprises a connecting part for elastic connection with the driving device, and the connecting part comprises a movable chamber; the driving device comprises a driving disc which can move back and forth in the predetermined direction, and the driving disc is contained in the movable chamber. Through the arrangement of the movable chamber, a setting area is provided for the driving disc and the elastic member, so that the driving device can drive the cantilever to move through the elastic member. The elastic member is arranged between the movable chamber and the driving disc, and the movement of the driving disc can be transmitted to the movable chamber through the elastic force generated by the elastic member, and then the cantilever is driven to move.

[0008] In the preferred technical scheme of the above spectrum acquisition system, the driving device further comprises a motor and a lead screw connected with the output shaft of the motor, the lead screw extends in the predetermined direction, and the driving disc forms a sliding connection with the lead screw. Through the above arrangement, the cooperation of the motor and the lead screw makes the positioning more accurate when the cantilever is driven to displace, and the driving disc can drive the cantilever to reach the accurate position by controlling the rotation parameters of the motor.

[0009] In the preferred technical scheme of the above spectrum acquisition system, in the predetermined direction, the driving disc comprises opposite first and second sides, the first side is provided with a first elastic member, and the second side is provided with a second elastic member; the driving disc compresses the elastic members to generate the elastic force. Through the arrangement of the two elastic members, the driving disc can drive the cantilever to move back and forth in the predetermined direction through the elastic force, and the cantilever abuts against the limiting device in the opposite two directions to be accurately positioned.

[0010] In the preferred technical scheme of the above spectrum acquisition system, the limiting device comprises a limiting groove, and at least part of the cantilever is accommodated in the limiting groove; in the predetermined direction, the inner wall of the limiting groove comprises opposite first and second limiting surfaces, and the driving device can drive the cantilever to abut against the first limiting surface or the second limiting surface. Through the above arrangement, the structure of the limiting groove is relatively simple, and the cantilever can be directly and effectively limited. The first and second limiting surfaces provide two limiting points for the cantilever, and the two stations can be accurately positioned.

[0011] In the preferred technical scheme of the above spectrum acquisition system, the plurality of stations comprises a reference station and a sample station; when the driving device drives the cantilever to abut against the first limiting surface, the reference station is positioned between the light source and the spectrometer; and when the driving device drives the cantilever to abut against the second limiting surface, the sample station is positioned between the light source and the spectrometer. Through the above arrangement, the reference station and the sample station are accurately positioned by the limiting device, so that the light emitted by the light source can pass through the reference station and the sample station at a suitable angle and intensity to form an effective spectrum in the spectrometer.

[0012] In the preferred technical scheme of the above spectrum acquisition system, the spectrum acquisition system further comprises an identification unit arranged at each station, when the identification unit satisfies a predetermined condition, the corresponding station is positioned between the light source and the spectrometer; when the identification unit on the reference station satisfies the predetermined condition, after a predetermined time, the driving device stops driving the cantilever to move and the cantilever abuts against the first limiting surface by the elastic force; or when the identification unit on the sample station satisfies the predetermined condition, after the predetermined time, the driving device stops driving the cantilever to move and the cantilever abuts against the second limiting surface by the elastic force. Through the arrangement of the identification unit, the information that the station is 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 station. In addition, when the identification unit on the reference station or the sample station satisfies the predetermined condition, it indicates that the reference station or the sample station reaches a measurable position, and on this basis, the driving device is stopped after a predetermined time, which further ensures that the cantilever can fully abut against the limiting part. Even if the cantilever abuts against the limiting device within the predetermined time period and the driving device is still running, the elastic force can also absorb the vibration generated by the driving device and absorb the excess pressure of the cantilever pressing on the limiting device.

[0013] In the preferred technical scheme of the above spectrum acquisition system, the plurality of stations further comprises a standard piece station and a dark current station arranged between the reference station and the sample station; when the identification unit on the standard piece station or the dark current station meets the predetermined condition, the driving device stops driving the cantilever to move. Through the above arrangement, the standard piece station and the dark current station do not need high positioning accuracy, can be arranged between the reference station and the sample station, and do not need to be limited by the limiting device, thereby simplifying the structure of the present application. In addition, since the positioning accuracy requirement is not high, when the identification unit on the standard piece station or the dark current station meets the predetermined condition, the driving device can be directly stopped.

[0014] In the preferred technical scheme of the above spectrum acquisition system, the spectrum acquisition system further comprises an optical coupling sensor, and the identification unit is a sensor trigger piece; when the sensor trigger piece triggers the optical coupling sensor, the identification unit meets the predetermined condition. Through the above arrangement, the optical coupling sensor can accurately identify the relative position between the station and the sensor trigger piece.

[0015] In the preferred technical scheme of the above spectrum acquisition system, the spectrum acquisition system further comprises a first collimating mirror arranged between the light source and the sample cell assembly and a second collimating mirror arranged between the sample cell assembly and the spectrometer, and the predetermined direction is perpendicular to the propagation direction of the light ray processed by the first collimating mirror. Through the above arrangement, the distance between the light source and the spectrometer can be compressed to the maximum extent, thereby improving the compactness of the spectrum acquisition system and reducing the space occupation. BRIEF DESCRIPTION OF DRAWINGS

[0016] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

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

[0018] Figure 2 is a sectional view of the embodiment of the spectrum acquisition system of the present application at A-A when the reference station is positioned between the light source and the spectrometer;

[0019] Figure 3 is a sectional view of the embodiment of the spectrum acquisition system of the present application at A-A when the standard piece station is positioned between the light source and the spectrometer;

[0020] Figure 4 is a sectional view of the embodiment of the spectrum acquisition system of the present application at A-A when the dark current station is positioned between the light source and the spectrometer;

[0021] Figure 5 is a sectional view of the embodiment of the spectrum acquisition system of the present application at A-A when the sample station is positioned between the light source and the spectrometer;

[0022] Figure 6 is a partial sectional view of a cantilever of an embodiment of the spectral acquisition system of the present application;

[0023] Figure 7 is a partial enlarged view of a sample cell assembly of an embodiment of the spectral acquisition system of the present application.

[0024] List of reference signs:

[0025] 100, spectral acquisition system; 10, light source; 20, spectrometer; 30, sample cell assembly; 31, cantilever; 311, connecting portion; 3111, movable chamber; 3112, first housing; 3113, second housing; 312, elastic member; 3121, first elastic member; 3122, second elastic member; 32, driving device; 321, driving disc; 322, motor; 323, screw rod; 33, reference position; 34, standard piece 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 application will be described hereinafter with reference to the accompanying drawings. It should be understood that the embodiments are only used to explain the technical principles of the present application, and are not intended to limit the scope of protection of the present application.

[0027] It should be noted that, in the description of the present application, the terms "first", "second" are only used for the purpose of description, and should not be understood as indicating or implying relative importance.

[0028] In addition, it should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] In order to solve the problem of low precision of the sample cell driving device of the existing spectrum acquisition system, thereby affecting the measurement accuracy, the present application provides a spectrum acquisition system 100. The spectrum acquisition system 100 of the present application comprises a light source 10, a spectrometer 20, a sample cell assembly 30 and a limiting device 40, wherein the spectrometer 20 and the light source 10 are oppositely arranged; the sample cell assembly 30 comprises a cantilever 31 and a driving device 32, the cantilever 31 is provided with a plurality of stations arranged linearly in a predetermined direction, the driving device 32 can drive the cantilever 31 to move in 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 with the cantilever 31; the driving device 32 can drive the cantilever 31 to abut against the limiting device 40 through the 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 is a top view of an embodiment of the spectrum acquisition system of the present application. As shown in Figure 1 , the spectrum acquisition system 100 of the present application comprises a light source 10, a sample cell assembly 30 and a spectrometer 20. The spectrometer 20 and the light source 10 are oppositely arranged, and the light source 10 can emit light rays towards the spectrometer 20. In one or more embodiments, the spectrum acquisition system 100 comprises an intermediate frame 50. The intermediate frame 50 is provided with coaxial first and second collimating mirrors 51 and 52. The light rays emitted from the light source 10 enter the first collimating mirror 51. The light rays processed by the first collimating mirror 51 can pass through one of the stations on the sample cell assembly 30 and enter the second collimating mirror 52. The light rays processed by the second collimating mirror 52 finally enter the spectrometer 20 to form a spectrum. Alternatively, the optical axes of the first and second collimating mirrors 51 and 52 can also be parallel to each other or form an angle, as long as other light paths for turning are arranged between the first and second collimating mirrors 51 and 52. Alternatively, the arrangement of the intermediate frame 50 can also be cancelled, and the first and second collimating mirrors 51 and 52 can be arranged at other suitable positions of the spectrum acquisition system 100.

[0031] Figure 2 is a sectional view of an embodiment of the spectrum acquisition system of the present application at A-A when the reference site is positioned between the light source and the spectrometer; Figure 3 is a sectional view of an embodiment of the spectrum acquisition system of the present application at A-A when the standard sheet site is positioned between the light source and the spectrometer; Figure 4 is a sectional view of an embodiment of the spectrum acquisition system of the present application at A-A when the dark current site is positioned between the light source and the spectrometer; Figure 5 is a sectional view of an embodiment of the spectrum acquisition system of the present application at A-A when the sample site is positioned between the light source and the spectrometer. As Figures 2 to 5As shown, the sample cell assembly 30 comprises 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 is capable of driving 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 As shown, the predetermined direction is the left-right direction. In practical applications, the predetermined direction can be a horizontal direction, a vertical direction or any other suitable linear direction. As shown in 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 collimating mirror 51, so as to improve the compactness of the spectral acquisition system 100 and reduce the space occupation. In one or more embodiments, the plurality of stations comprises, in sequence from left to right, a reference station 33, a standard sheet station 34, a dark current station 35 and a sample station 36. The reference station 33 and the sample station 36 are respectively arranged on opposite sides of the cantilever 31. The standard sheet station 34 and the dark current station 35 are arranged between the reference station 33 and the sample station 36. The reference station 33, the sample station 36 and the standard sheet station 34 are provided with light transmission holes, so as to facilitate the light to pass through the sample, the standard sheet, the reference plate and the like, so as to generate a spectrum in the spectrometer 20. In alternative embodiments, the reference plate can be omitted and the ambient air can be used as the reference. The dark current station 35 can be arranged at a light-tight position of the cantilever 31, so as to cut off the light provided by the light source 10 to the spectrometer 20 and acquire a dark current spectrum. Exemplarily, the dark current station 35 can be arranged between the light transmission holes of the standard sheet station 34 and the sample station 36. In alternative embodiments, the standard sheet station 34 can be omitted.

[0033] Figure 6 is a partial sectional view of the cantilever of an embodiment of the spectral acquisition system of the present application; Figure 7 is a partial enlarged view of the sample cell assembly of an embodiment of the spectral acquisition system of the present application. As shown in Figure 6 As shown in one or more embodiments, the cantilever 31 comprises a connecting portion 311 for elastically connecting with the driving device 32. The connecting portion 311 is provided with a movable chamber 3111. The driving device 32 comprises a driving disc 321 capable of reciprocating along the predetermined direction, and the driving disc 321 is accommodated in the movable chamber 3111. A resilient member 312, such as a coil spring, an air spring or the like, is arranged between the driving disc 321 and the inner wall of the movable chamber 3111. The driving disc 321 can compress the spring to generate an elastic force on the connecting portion 311, so as to drive the cantilever 31 to move along the predetermined direction.

[0034] In one or more embodiments, the driving device 32 further comprises a motor 322 and a screw rod 323 driven by the motor 322, and the driving disc 321 is sleeved on the screw rod 323 extending in a predetermined direction and forms a sliding connection with the screw rod 323, so as to be reciprocated in the predetermined direction. Alternatively, the driving disc 321 can also be reciprocated in other ways. As shown in Figure 7 Further, the connecting part 311 can comprise a detachable first shell 3112 and a second shell 3113, which together enclose the movable cavity 3111. By the provision of the first shell 3112 and the second shell 3113, the screw rod 323 can extend through the movable cavity 3111, facilitating the installation of the driving disc 321, the elastic member 312, etc. Alternatively, the connecting part 311 can also be configured in other suitable configurations.

[0035] Continuing to refer to Figure 7 In one or more embodiments, in the predetermined direction, the driving disc 321 comprises opposite first and second sides. Based on the Figure 7 orientation shown, the first side is rightward and the second side is leftward. The first side is provided with a first elastic member 3121 and the second side is provided with a second elastic member 3122, so that the elastic member 312 can provide positioning function for the cantilever 31 in two opposite directions. Alternatively, in the embodiment where only one station needs accurate positioning, only one elastic member 312 can be provided.

[0036] Continuing to refer to 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 slot 41. At least a portion of the cantilever 31 is accommodated in the limiting slot 41. Specifically, the portion of the cantilever 31 accommodated in the limiting slot 41 can be the connecting portion 311, which abuts against the limiting slot 41 through the connecting portion 311. The inner wall of the limiting slot 41 includes opposite first and second limiting faces 411 and 412. The driving device 32 can drive the cantilever 31 to abut against the first and second limiting faces 411 and 412, so as to accurately position two different stations. In one or more embodiments, when the driving device 32 drives the cantilever 31 to abut against the first limiting face 411, the reference site 33 is positioned between the light source 10 and the spectrometer 20, and the spectrometer 20 can receive light emitted from the light source 10 and passing through the reference site 33; when the driving device 32 drives the cantilever 31 to abut against the second limiting face 412, the sample site 36 is positioned between the light source 10 and the spectrometer 20, and the spectrometer 20 can receive light emitted from the light source 10 and passing through the sample site 36. Compared with directly driving the cantilever 31 to abut against the first limiting face 411 or the second limiting face 412, the technical solution of indirectly driving the cantilever 31 to abut against the first limiting face 411 or the second limiting face 412 through the elastic force (e.g., provided by the elastic members 312 disposed on both sides of the driving disc 321) can avoid the problem that the cantilever 31 cannot accurately abut against the first limiting face 411 or the second limiting face 412 due to transmission errors. In addition, the elastic force can also absorb the vibration generated when the cantilever 31 contacts the first limiting face 411 or the second limiting face 412, so as to avoid 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 at each station, and when the identification unit meets a predetermined condition, the corresponding station is positioned between the light source 10 and the spectrometer 20. For example, as shown in FIG. 1, the identification unit 50 is disposed at the reference site 33, and the identification unit 50 includes a reference light source 51 and a reference light detector 52. The reference light source 51 is configured to emit reference light, and the reference light detector 52 is configured to receive the reference light emitted from the reference light source 51 and passing through the reference site 33. When the reference light detector 52 receives the reference light, it is determined that the reference site 33 meets the predetermined condition, and the reference site 33 is positioned between the light source 10 and the spectrometer 20. Figure 2As shown, during the process of the drive device 32 driving the cantilever 31 to move to the right, after a predetermined time has elapsed since the identification unit on the reference position 33 meets the predetermined conditions, the drive device 32 stops driving the cantilever 31 to move, and the cantilever 31 abuts against the first limiting surface 411 under the action of the elastic force applied by the elastic member 312 (exemplarily, this elastic force can be generated by the compression of the first elastic member 3121 by the rightward displacement of the drive disk 321). By setting the predetermined time, the drive device 32 stops after a delay, so that when the drive device 32 has a transmission error that causes the cantilever 31 to fail to fit against the first limiting surface 411, it can continue to move towards the first limiting part. On the other hand, even if the cantilever 31 has already abutted against the first limiting surface 411 when the identification unit meets the predetermined conditions, the reaction force of the first limiting surface 411 can be absorbed by the first elastic member 3121 under the action of the elastic force, thereby improving the positioning accuracy of the reference position 33. Due to the presence of the first limiting surface 411, the position of the reference position 33 can remain consistent when the drive cantilever 31 reciprocates to repeatedly acquire the reference. Specifically, the power source in the drive device 32 can be a stepper motor, and the method to stop the drive after a predetermined time can be to increase the number of rotations based on the design value of the number of rotations. The excess displacement of the cantilever 31 can be absorbed by compressing the elastic element 312.

[0038] Similarly, such as Figure 5 As shown, when the identification unit on sample position 36 meets the predetermined conditions, sample position 36 is positioned between light source 10 and spectrometer 20. Further, during the movement of cantilever 31 driven by drive device 32, after a predetermined time elapses following the time when the identification unit on sample position 36 meets the predetermined conditions, drive device 32 stops driving cantilever 31, and cantilever 31 abuts against the second limiting surface 412 under the action of an elastic force (for example, this elastic force can be generated by the compression of the second elastic element 3122 by the leftward displacement of drive disk 321). Through the above settings, sample position 36, which requires high positioning accuracy, can also abut against the second limiting surface 412, thereby accurately positioning and ensuring that the position of sample position 36 remains consistent when repeatedly acquiring sample spectra by reciprocating movement of cantilever 31.

[0039] In one or more embodiments, the acquisition of dark current spectrum and standard plate spectrum is less affected by the positioning accuracy of the workstation. Therefore, when the identification unit on the standard plate position 34 or dark current position 35 meets the predetermined conditions, the driving device 32 can stop driving the cantilever 31 to move. Alternatively, dark current and standard plate spectrum can also be acquired in other ways as needed.

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

[0041] The use method of the present application will be described below in combination with the above-described structure. Referring to Figure 2 , first control the driving device 32 to abut the cantilever 31 against the first limit surface 411, to ensure that the light transmission hole on the reference site 33 is accurately aligned with the first collimating mirror 51 and the second collimating mirror 52, and to acquire a reference spectrum. As shown in Figure 3 , then the driving device 32 drives the cantilever 31 to move left, so that the light transmission hole of the standard sheet site 34 is aligned with the first collimating mirror 51 and the second collimating mirror 52, and a standard sheet spectrum is acquired. As shown in Figure 4 , then continue to drive the cantilever 31 to move left so that the dark current site 35 is aligned with the first collimating mirror 51 and the second collimating mirror 52, and a dark current spectrum is acquired. As shown in Figure 5 , finally, the driving device 32 drives the cantilever 31 to abut against the second limit surface 412, to ensure that the light transmission hole on the sample site 36 is accurately aligned with the first collimating mirror 51 and the second collimating mirror 52, and a sample spectrum is acquired. At this point, one test sampling is completed, and the cantilever 31 can be driven to move right in reverse, and then abut against the first limit surface 411 again, to perform the next set of sampling.

[0042] At this point, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after these changes or replacements will all fall within the protection scope of the present application.

Claims

1. A spectral acquisition system, characterized by, The spectrum acquisition system comprises a light source, a spectrometer, a sample cell assembly and a limiting device, wherein the spectrometer and the light source are oppositely arranged; the sample cell assembly comprises a cantilever and a driving device, the cantilever is provided with a plurality of workstations arranged linearly along a predetermined direction, the driving device can drive the cantilever to move along the predetermined direction, so that any workstation can be positioned between the light source and the spectrometer, and the driving device is elastically connected with the cantilever; the driving device can drive the cantilever to abut against the limiting device through an elastic force, so that at least one of the plurality of workstations is positioned between the light source and the spectrometer; The cantilever comprises a connecting part for elastically connecting with the driving device, and the connecting part comprises a movable chamber; The driving device comprises a driving disc which can reciprocally move along the predetermined direction, and the driving disc is contained in the movable chamber; The driving device further comprises a motor and a screw rod connected with an output shaft of the motor, the screw rod extends along the predetermined direction, and the driving disc is in sliding connection with the screw rod; In the predetermined direction, the driving disc comprises 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; the driving disc compresses the elastic members to generate the elastic force; The limiting device comprises a limiting groove, and at least part of the cantilever is contained in the limiting groove; In the predetermined direction, an inner wall of the limiting groove comprises a first limiting surface and a second limiting surface opposite to each other, and the driving device can drive the cantilever to abut against the first limiting surface or the second limiting surface.

2. The optical spectrum acquisition system of claim 1, wherein, The plurality of workstations comprises a reference workstation and a sample workstation; When the driving device drives the cantilever to abut against the first limiting surface, the reference workstation 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 workstation is positioned between the light source and the spectrometer.

3. The spectrum acquisition system according to claim 2, wherein The spectrum acquisition system further comprises an identification unit arranged on each workstation, when the identification unit satisfies 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 workstation satisfies the predetermined condition, after a predetermined time, the driving device stops driving the cantilever to move and the cantilever abuts against the first limiting surface through the elastic force; Or From the time when the identification unit on the sample workstation satisfies the predetermined condition, after the predetermined time, the driving device stops driving the cantilever to move and the cantilever abuts against the second limiting surface through the elastic force.

4. The spectrum acquisition system according to claim 3, wherein The plurality of workstations further comprises a standard piece workstation and a dark current workstation arranged between the reference workstation and the sample workstation; When the identification unit on the standard piece workstation or the dark current workstation satisfies the predetermined condition, the driving device stops driving the cantilever to move.

5. The optical spectrum acquisition system of claim 3, wherein, the optical spectrum acquisition system further comprises a photo-coupler sensor, and the identification unit is a sensor trigger piece, when the sensor trigger piece triggers the photo-coupler sensor, the identification unit satisfies the predetermined condition.

6. The optical spectrum acquisition system of claim 1, wherein, the optical spectrum acquisition system further comprises a first collimating mirror arranged between the light source and the sample cell assembly, and a second collimating mirror arranged between the sample cell assembly and the optical spectrum analyzer, and the predetermined direction is perpendicular to a propagation direction of the light processed by the first collimating mirror.

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