Spectrum acquisition system

Abstract

The utility model provides a spectrum acquisition system. The spectrum acquisition system comprises a light source; the spectrograph and the light source are oppositely arranged; the station switching device comprises a support, a driving device and a plurality of stations arranged on the support, the support is provided with a support rotating shaft, the stations are arranged at intervals in the circumferential direction of the support rotating shaft, the driving device can drive the support to rotate around the support rotating shaft, and any station can be positioned between the light source and the spectrograph. The driving device is elastically connected with the bracket through the elastic piece; and the positioning device comprises a limiting part, and the support can abut against the limiting part through the acting force applied by the elastic piece, so that one of the multiple stations is positioned between the light source and the spectrograph. According to the technical scheme, the problem that in the prior art, a station switching device in a spectrum collection system is not high in precision, and consequently measurement accuracy is affected is solved.

Description

Technical Field

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

[0002] Conventional near-infrared spectrometers typically employ the following configuration: a spectrometer and a light source are positioned face-to-face. Light from the light source passes through a sample or standard before entering the spectrometer. A movable element is positioned between the light source and the spectrometer, housing four positions for the sample, reference, standard, and dark current. By moving this element laterally, the spectrometer can collect spectrum from the sample, reference, dark current, and standard.

[0003] Switching between the standard and sample stations requires lateral movement, and the existing transmission mechanisms, which are often composed of gear racks, screws, and slider-crank mechanisms, are affected by the precision of the moving parts, resulting in low measurement accuracy. Furthermore, the movement of the sample station can also cause wear on the optical path components.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Utility Model Content

[0005] In order to solve the problem of low precision of the workstation switching device in the existing spectrum acquisition system, thereby affecting 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, the spectrometer and the light source are arranged relative to each other; a workstation switching device, the workstation switching device including a bracket, a driving device and a plurality of workstations arranged on the bracket, the bracket having a bracket shaft, the plurality of workstations being arranged at intervals along the circumference of the bracket shaft, the driving device being able to drive the bracket to rotate around the bracket shaft so that any of the workstations can be positioned between the light source and the spectrometer, the driving device being elastically connected to the bracket via an elastic member; and a positioning device, the positioning device including a limiting portion, the bracket being able to abut against the limiting portion through the force applied by the elastic member, so that one of the plurality of workstations is positioned between the light source and the spectrometer.

[0006] The utility model discloses a light source and spectrometer are relatively arranged, and the spectrometer can get corresponding spectrum through accepting the light of light source emission and passing sample or standard piece etc. The support, drive arrangement and multiple stations of setting on the support, the support has support pivot, multiple stations are along the circumferential interval of support pivot and set, drive arrangement can drive the support rotates around support pivot, makes any station can be positioned between the light source and the spectrometer, through above-mentioned configuration, multiple stations switching is no longer realized through horizontal movement, further avoids to involve the light path related structural member, prevents its abrasion. Drive arrangement forms elastic connection with the support through elastic part, the support can be positioned between the light source and the spectrometer through the abutting of the elastic part with the limiting portion, and one of multiple stations is positioned. Through above-mentioned setting, the limiting portion ensures that one of multiple stations needs positioning precision higher and can be positioned accurately, avoids the error of transmission part in drive arrangement, also improves the repeat accuracy of the station. In addition, through the setting of elastic part, the influence of the positioning accuracy of station by the vibration of drive arrangement is avoided.

[0007] In the preferred technical scheme of the above-mentioned spectrum acquisition system, the drive device further comprises a motor and a connecting rod mechanism, one end of the connecting rod mechanism is connected with an output shaft of the motor, and the other end of the connecting rod mechanism is connected with the support through the elastic part. Through the setting of the connecting rod mechanism, the setting position between the support and the motor is more flexible, so as to facilitate the spatial arrangement of the spectrum acquisition system.

[0008] In the preferred technical scheme of the above-mentioned spectrum acquisition system, the connecting rod mechanism comprises a first connecting rod and a second connecting rod which are rotationally connected, the first connecting rod is connected with the output shaft, and the elastic part is connected with the second connecting rod.

[0009] In the preferred technical scheme of the above-mentioned spectrum acquisition system, the support comprises a clamping portion, the clamping portion is spaced apart from the support pivot, and the elastic part is rotationally connected with the clamping portion. Through the above-mentioned setting, a four-bar linkage mechanism is formed between the support pivot and the output shaft of the motor, and the flexibility of the motor driving the station switching is higher.

[0010] In the preferred technical scheme of the above-mentioned spectrum acquisition system, the multiple stations comprise a reference station and a sample station, the limiting portion comprises a first limiting portion and a second limiting portion; when the drive device drives the support to abut against the first limiting portion, the reference station is positioned between the light source and the spectrometer; and when the drive device drives the support to abut against the second limiting portion, the sample station is positioned between the light source and the spectrometer. Through the above-mentioned setting, the reference station and the sample are accurately positioned by the limiting portion, 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.

[0011] In the preferred technical scheme of the above spectrum acquisition system, the positioning device further comprises an identification unit arranged on each of the stations, and when the identification unit meets a predetermined condition, the corresponding station is positioned between the light source and the spectrometer; when the identification unit on the reference station meets the predetermined condition, after a predetermined time, the driving device stops driving the support to rotate and the support abuts against the first limiting part under the action of the elastic member; or when the identification unit on the sample station meets the predetermined condition, after the predetermined time, the driving device stops driving the support to rotate and the support abuts against the second limiting part under the action of the elastic member. Through the arrangement of the identification unit, the information that the station is driven to the appropriate position by the driving device can be acquired 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 meets the predetermined condition, it indicates that the reference station or the sample station reaches the position that can be measured, and on this basis, the driving device is stopped after the predetermined time, which further ensures that the support can fully abut against the limiting part. Even if the support abuts against the limiting part within the predetermined time period and the driving device is still running, the vibration generated by the driving device can be absorbed by the elastic member, and the excessive pressure of the support pressing on the limiting part can also be absorbed.

[0012] 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 support to rotate. Through the above arrangement, the standard piece station and the dark current station do not need high positioning accuracy and can be arranged between the reference station and the sample station without limiting part for limiting, thereby simplifying the structure of the utility model. In addition, since the positioning accuracy requirement is not high, the driving device can be directly stopped when the identification unit on the standard piece station or the dark current station meets the predetermined condition.

[0013] In the preferred technical scheme of the above spectrum acquisition system, any of the stations is provided with a light transmission hole; when the identification unit meets the predetermined condition, the light emitted from the light source can pass through the light transmission hole on the station where the identification unit is arranged.

[0014] In the preferred technical scheme of the above spectrum acquisition system, the positioning device comprises an optical coupling sensor, and the identification unit is a sensor trigger piece, and 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 optical coupling sensor.

[0015] In the preferred technical scheme of the spectrum acquisition system, the bracket comprises a clamping part; the elastic member is connected with the clamping part and comprises a clamping jaw surrounding the outside of the clamping part, the clamping jaw comprises a first side wall and a second side wall, the first side wall can exert an acting force on the clamping part for abutting the bracket against the first limiting part, and the second side wall can exert an acting force on the clamping part for abutting the bracket against the second limiting part. Through the above arrangement, the clamping jaw ensures that the driving device and the bracket can form transmission, and the first side wall and the second side wall respectively realize the effect of tightly abutting the bracket against the first limiting part and the second limiting part. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0018] Figure 2 is a structural schematic view of an embodiment of the bracket of the spectrum acquisition system of the present application;

[0019] Figure 3 is a structural schematic view of an embodiment of the spectrum acquisition system from a reverse perspective; Figure 1

[0020] Figure 4 is a structural schematic view of an embodiment of the driving device of the spectrum acquisition system of the present application;

[0021] Figure 5 is a structural schematic view of an embodiment of the spectrum acquisition system of the present application when collecting a dark current spectrum

[0022] Figure 6 is a structural schematic view of an embodiment of the spectrum acquisition system of the present application when collecting a reference spectrum;

[0023] Figure 7 is a structural schematic view of an embodiment of the spectrum acquisition system of the present application when collecting a sample spectrum.

[0024] LIST OF REFERENCE NUMERALS:

[0025] ​100, spectrum acquisition system; 10, light source; 20, spectrometer; 30, station switching device; 31, support; 311, bottom plate; 312, side wall; 313, support rotating shaft; 314, clamping part; 32, station; 321, reference site; 322, sample site; 323, standard piece site; 324, dark current site; 325, light transmission hole; 33, driving device; 331, motor; 332, connecting rod mechanism; 3321, first connecting rod; 3312, second connecting rod; 333, elastic member; 3331, clamping jaw; 33311, first side wall; 33312, second side wall; 40, intermediate frame; 41, first collimating mirror; 42, second collimating mirror; 50, positioning device; 51, limiting part; 511, first limiting part; 512, second limiting part. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art will understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0027] It should be noted that in the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot 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 specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between the 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 station switching device in the prior art spectrum acquisition system, thereby affecting the measurement accuracy, the utility model provides a spectrum acquisition system 100. The spectrum acquisition system 100 of the utility model includes: light source 10;Spectrometer 20, spectrometer 20 and light source 10 are oppositely arranged;Station switching device 30, station switching device 30 includes support 31, drive device 33 and multiple stations 32 arranged on support 31, support 31 has support pivot 313, multiple stations 32 are arranged along the circumference of support pivot 313, drive device 33 can drive support 31 to rotate around support pivot 313, so that any station 32 can be positioned between light source 10 and spectrometer 20, drive device 33 is elastically connected with support 31 through elastic element 333;And positioning device 50, positioning device 50 includes limiting portion 51, support 31 can be abutted with limiting portion 51 by the action force of elastic element 333, so that one of multiple stations 32 is positioned between the light source 10 and the spectrometer 20.

[0030] Figure 1 It is the structure diagram of the embodiment of the spectrum acquisition system of the utility model. As shown in Figure 1 The spectrum acquisition system 100 of the utility model includes light source 10, station switching device 30 and spectrometer 20. Spectrometer 20 and light source 10 are oppositely arranged, and light source 10 can emit light rays towards spectrometer 20. In one or more embodiments, the spectrum acquisition system 100 includes an intermediate frame 40. The intermediate frame 40 is provided with coaxial first collimating mirror 41 and second collimating mirror 42. The light rays emitted from the light source 10 enter the first collimating mirror 41. The light rays collimated by the first collimating mirror 41 can pass through one of the stations 32 on the station switching device 30 and enter the second collimating mirror 42. The light rays processed by the second collimating mirror 42 finally enter the spectrometer 20 to form a spectrum. Alternatively, the optical axes of the first collimating mirror 41 and the second collimating mirror 42 can also be parallel to each other or form an angle, as long as other light paths for turning are provided between the first collimating mirror 41 and the second collimating mirror 42. Alternatively, the first collimating mirror 41 and the second collimating mirror 42 can also be arranged at other suitable positions of the spectrum acquisition system 100.

[0031] Figure 2 It is the structure diagram of the support embodiment of the spectrum acquisition system of the utility model. As shown in Figure 1 And Figure 2 The station switching device 30 includes support 31 and multiple stations 32 arranged on support 31. In one or more embodiments, Figure 1 As a top view of the spectrum acquisition system 100, the support 31 includes a horizontally extending bottom plate 311 and a vertically extending side wall 312. The side wall 312 is connected with the bottom plate 311, and the connection mode includes but is not limited to screwing, clamping, riveting and the like. Alternatively,Figure 1 The bottom plate 311 extends in the vertical direction, and the side wall 312 extends in the circumferential direction of the support shaft 313, so that the plurality of workstations 32 can be arranged along the circumferential direction of the support shaft 313.

[0032] With reference back to Figure 2 In one or more embodiments, the plurality of workstations 32 are arranged on the side wall 312. The plurality of workstations 32 include a reference workstation 321, a sample workstation 322, a standard slice workstation 323, and a dark current workstation 324. The reference workstation 321 and the sample workstation 322 are arranged on opposite sides of the side wall 312, respectively. The standard slice workstation 323 and the dark current workstation 324 are arranged between the reference workstation 321 and the sample workstation 322. The reference workstation 321, the sample workstation 322, and the standard slice workstation 323 are provided with light transmission holes 325, so that light can pass through the sample, the standard slice, the reference plate, etc. to generate a spectrum in the spectrometer 20. The dark current workstation 324 can be arranged at a position of the side wall 312 where no light transmission hole 325 is provided, so as to cut off the light provided by the light source 10 to the spectrometer 20 and collect a dark current spectrum. Exemplarily, the dark current workstation 324 can be arranged at a corner of the side wall 312. Alternatively, the standard slice workstation 323 can also be omitted.

[0033] With reference back to Figure 1 and Figure 2 The support 31 has a support shaft 313 about which the support 31 can rotate. In one or more embodiments, the bottom plate 311 is configured in a substantially sector shape, and the support shaft 313 is arranged at the center of the sector and is perpendicular to the bottom plate 311 (based on the orientation shown in Figure 1 , the support shaft is perpendicular to the paper). The side wall 312 extends substantially along the circumferential direction of the support shaft 313, so that the plurality of workstations 32 can be arranged along the circumferential direction of the support shaft 313. Alternatively, the support 31 can also be configured in other suitable shapes according to actual needs, as long as the plurality of workstations 32 can be arranged along the circumferential direction of the support shaft 313.

[0034] With reference back to Figure 1 The workstation switching device 30 further includes a driving device 33. The driving device 33 can drive the support 31 to rotate about the support shaft 313, so that any one of the workstations 32 can be positioned between the light source 10 and the spectrometer 20, specifically, between the first collimating mirror 41 and the second collimating mirror 42.

[0035] Figure 3 is a structural schematic view of an embodiment of the spectrum collection system from a perspective opposite to Figure 1 . As shown in Figure 3 , in one or more embodiments, the driving device 33 includes a motor 331 and a linkage mechanism 332. One end of the linkage mechanism 332 is connected to the output shaft of the motor 331, and the other end is connected to the support 31, so that the corresponding workstation 32 can be driven by the motor 331 to rotate to a suitable position.

[0036] Figure 4 FIG. 1 is a schematic structural diagram of an embodiment of the driving device 33 of the spectrum acquisition system 100 of the present invention. Figure 4 As shown, in one or more embodiments, the linkage mechanism 332 includes a first link 3321 and a second link 3312 that are rotatably connected. The first link 3321 is connected to the output shaft of the motor 331. The first link 3321 can have various forms. For example, the first link 3321 can be configured as an elongated rod or an eccentric disc. The second link 3312 is rotatably connected to the bracket 31, so that the motor 331 drives the first link 3321. The first link 3321 transmits displacement and rotation to the second link 3312, thereby driving the bracket 31 to rotate about the bracket rotation axis 313. Furthermore, the second link 3312 is rotatably connected to the clamping portion 314 on the bracket 31. The clamping portion 314 is spaced apart from the bracket rotation axis 313, so that the output shaft of the motor 331 and the bracket rotation axis 313 generally form a four-bar linkage, which facilitates flexible configuration of the spatial layout of the drive device 33. The clamping portion 314 may be provided on the bottom plate 311 or at other suitable locations on the bracket 31. Alternatively, the link mechanism 332 may also be configured in other suitable forms.

[0037] Continue reading Figure 4 , the driving device 33 also includes an elastic member 333. In one or more embodiments, the elastic member 333 is provided on the connecting rod mechanism 332, and illustratively, can be provided on the second connecting rod 3312. Alternatively, the elastic member 333 can also be provided at other suitable positions on the driving device 33 according to actual conditions. In one or more embodiments, the elastic member 333 includes a clamping claw 3331 connected to the clamping portion 314 and surrounding the outside of the clamping portion 314. The clamping claw 3331 includes a first side wall 33311 and a second side wall 33312. As shown in FIG. Figure 4 As shown, the first side wall 33311 is tilted away from the second connecting rod 3312, and the second side wall 33312 is tilted toward the second connecting rod 3312, thereby enabling forces to be applied to the clamping portion 314 from two opposite directions. The number of clamping jaws 3331 can be configured as two, each of which includes a first side wall 33311 and a second side wall 33312. The area enclosed by the two clamping jaws 3331 accommodates the clamping portion 314, enabling it to be rotatably connected to the clamping portion 314. Alternatively, the number of clamping jaws 3331 can also be other suitable numbers, such as one or three.

[0038] Continue reading Figure 1The spectral acquisition system 100 further comprises a positioning device 50. The positioning device 50 comprises a limiting portion 51 for limiting the rotation of the support 31. The support 31 can abut against the limiting portion 51 by the action force of the elastic member 333, so that one of the plurality of stations 32 is positioned between the light source 10 and the spectrometer 20. Specifically, the bottom plate 311 can abut against the limiting portion 51. In one or more embodiments, the limiting portion 51 comprises a first limiting portion 511 and a second limiting portion 512 respectively arranged on both sides of the support 31. When the driving device 33 drives the support 31 to abut against the first limiting portion 511, the reference site 321 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 light transmission hole 325 on the reference site 321. When the driving device 33 drives the support 31 to abut against the second limiting portion 512, the sample site 322 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 light transmission hole 325 on the sample site 322. Compared with directly driving the support 31 to abut against the limiting portion 51 by the motor 331, the technical solution of indirectly abutting the support 31 against the limiting portion 51 by the elastic member 333 can avoid the problem that the support 31 cannot accurately abut against the limiting portion 51 due to transmission error, and the elastic member 333 can also absorb the vibration generated when the support 31 contacts the limiting portion 51, thereby avoiding the problem that the vibration affects the positioning accuracy.

[0039] In one or more embodiments, the positioning device 50 further comprises an identification unit arranged on each station 32, and when the identification unit satisfies a predetermined condition, the corresponding station 32 is positioned between the light source 10 and the spectrometer 20. For example, when the identification unit on the reference site 321 satisfies the predetermined condition, the reference site 321 is positioned between the light source 10 and the spectrometer 20. Further, during the process of driving the support 31 to rotate by the driving device 33, when the identification unit on the reference site 321 satisfies the predetermined condition and after a predetermined time, the driving device 33 stops driving the support 31 to rotate and the support 31 abuts against the first limiting portion 511 under the action force of the elastic member 333 (the action force is provided by the first side wall 33311). By setting the predetermined time, the driving device 33 is delayed to stop, so that when the driving device 33 cannot be attached to the first limiting portion 511 due to transmission error, it can continue to rotate towards the first limiting portion 511. On the other hand, even if the support 31 has abutted against the first limiting portion 511 when the identification unit satisfies the predetermined condition, the reaction force of the support 31 under the action of the elastic member 333 will not cause excessive pressure to the inside of the driving device 33, and the vibration generated by the driving device 33 can be absorbed by the elastic member 333, thereby improving the positioning accuracy of the reference site 321. When the reference is repeatedly obtained by repeatedly rotating the support 31, the position of the reference site 321 can always remain consistent.

[0040] Similarly, when the identification unit on the sample site 322 meets the predetermined condition, the sample site 322 is positioned between the light source 10 and the spectrometer 20. Further, during the process that the driving device 33 drives the bracket 31 to rotate, when the identification unit on the sample site 322 meets the predetermined condition and after a predetermined time, the driving device 33 stops driving the bracket 31 to rotate and the bracket 31 abuts against the second limiting part 512 under the action force of the elastic member 333 (the action force is provided by the second side wall 33312). Through the above arrangement, the sample site 322 with higher positioning accuracy requirement can also be closely abutted on the second limiting part 512, so as to be accurately positioned and ensure that the position of the sample site 322 remains consistent when repeatedly acquiring the sample spectrum through the reciprocating rotation of the bracket 31.

[0041] Continuously referring to Figure 1 In one or more embodiments, the limiting part 51 is in fixed connection with the intermediate frame 40. Alternatively, the limiting part 51 can also be arranged at other suitable positions on the spectrum acquisition system 100. In alternative embodiments, the limiting part 51 can also include parts other than the first limiting part 511 and the second limiting part 512 to accurately position other work sites 32.

[0042] In one or more embodiments, the acquisition of the dark current spectrum and the standard sheet spectrum is less affected by the positioning accuracy of the work site 32, so when the identification unit on the standard sheet site 323 or the dark current site 324 meets the predetermined condition, the driving device 33 can stop driving the bracket 31 to rotate. Alternatively, the acquisition of the dark current and the standard sheet spectrum can also be performed through other ways according to actual needs.

[0043] In one or more embodiments, the positioning device 50 further includes an optical coupling sensor, and the identification unit is configured as a sensor trigger piece. When the sensor trigger piece triggers the optical coupling sensor, it can be considered that the identification unit meets the predetermined condition. The optical coupling sensor can be fixed at a position close to the second collimating mirror 42 of the intermediate frame 40, so that when the optical coupling sensor is triggered by the sensor trigger piece, the light transmission hole 325 on the corresponding work site 32 is roughly aligned with the second collimating mirror 42, and light can pass through the light transmission hole 325 to reach the spectrometer 20 to generate a spectrum. Alternatively, the positioning device 50 can also be provided with other sensors to identify the position of the work site 32.

[0044] Figure 5 is a structural schematic view of an embodiment of the spectrum acquisition system of the utility model when acquiring a dark current spectrum; Figure 6 is a structural schematic view of an embodiment of the spectrum acquisition system of the utility model when acquiring a reference spectrum; Figure 7 is a structural schematic view of an embodiment of the spectrum acquisition system of the utility model when acquiring a sample spectrum. The use method of the utility model will be described below in combination with the above structure. As shown inFigure 5 As shown in the drawings, in one or more embodiments, the light hole 325 on any station 32 is not aligned with the first collimating mirror 41 and the second collimating mirror 42, and the dark current spectrum can be collected first. Referring to the drawings in succession Figure 1 Then the driving device 33 is controlled to abut the support 31 against the first limit part 511, ensuring that the light hole on the reference station 321 is accurately aligned with the first collimating mirror 41 and the second collimating mirror 42, and the reference spectrum is collected. As shown in the drawings Figure 6 As shown in the drawings, then the support 31 is rotated counterclockwise, and the light hole 325 of the standard sheet station 323 is aligned with the first collimating mirror 41 and the second collimating mirror 42, and the standard sheet spectrum is collected. As shown in the drawings Figure 7 As shown in the drawings, finally the driving device 33 is controlled to abut the support 31 against the second limit part 512, ensuring that the light hole on the sample station 322 is accurately aligned with the first collimating mirror 41 and the second collimating mirror 42, and the sample spectrum is collected.

[0045] In alternative embodiments, when the light hole 325 is aligned with the first collimating mirror 41 and the second collimating mirror 42 at the beginning, it is determined whether the light hole 325 is on the reference station 321 or the sample station 322, and if so, the support 31 is still abutted against the corresponding limit part 51 by the driving device 33; if not, it means that the positioning accuracy required by the station 32 is low, and the spectrum can be directly obtained. Then the dark current spectrum is obtained at a suitable position where the side wall 312 blocks the first collimating mirror 41 and the second collimating mirror 42.

[0046] So far, the technical scheme of the present application has 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 related technical features without deviating from the principles of the present application, and the technical scheme after these changes or replacements will fall within the protection scope of the present application.

Claims

1. A spectrum acquisition system, characterized in that: The spectrum acquisition system comprises: light source; a spectrometer, wherein the spectrometer and the light source are arranged opposite to each other; A workstation switching device, the workstation switching device comprising a bracket, a driving device and a plurality of workstations arranged on the bracket, the bracket having a bracket rotating shaft and a clamping portion spaced apart from the bracket rotating shaft, the plurality of workstations being spaced apart along the circumference of the bracket rotating shaft, the driving device being capable of driving the bracket to rotate around the bracket rotating shaft so that any of the workstations can be positioned between the light source and the spectrometer, the driving device comprising a motor and a connecting rod mechanism, one end of the connecting rod mechanism being connected to the output shaft of the motor, and the other end thereof being elastically connected to the bracket via an elastic member, wherein the elastic member is rotatably connected to the clamping portion; the connecting rod mechanism comprising a first connecting rod and a second connecting rod rotatably connected, the first connecting rod being connected to the output shaft, and the elastic member being connected to the second connecting rod; and The positioning device includes a limiting portion, and the bracket can be pressed against the limiting portion by the force applied by the elastic member, so that one of the multiple workstations is positioned between the light source and the spectrometer.

2. The spectrum acquisition system according to claim 1, characterized in that: The plurality of workstations include a reference position and a sample position, and the position limiting portion includes a first position limiting portion and a second position limiting portion; When the driving device drives the bracket to abut against the first limiting portion, the reference position is positioned between the light source and the spectrometer; When the driving device drives the bracket to abut against the second limiting portion, the sample position is positioned between the light source and the spectrometer.

3. The spectrum acquisition system according to claim 2, characterized in that: The positioning device further includes an identification unit provided on each of the workstations, and when the identification unit satisfies a 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 bracket to rotate and the bracket abuts against the first limiting portion under the force applied by the elastic member; 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 bracket to rotate and the bracket abuts against the second limiting portion under the force applied by the elastic member.

4. The spectrum acquisition system according to claim 3, 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 bracket to rotate.

5. The spectrum acquisition system according to claim 3, characterized in that: Any of the workstations is provided with a light-through hole; When the recognition unit meets the predetermined condition, the light emitted from the light source can pass through the light hole on the station where the recognition unit is located.

6. The spectrum acquisition system according to claim 3, characterized in that: The positioning device 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 meets a predetermined condition.

7. The spectrum acquisition system according to claim 2, characterized in that: The bracket includes a clamping portion; The elastic member is connected to the clamping portion and includes a clamping claw surrounding the outside of the clamping portion, the clamping claw includes a first side wall and a second side wall, the first side wall can apply a force to the clamping portion to press the bracket against the first limiting portion, and the second side wall can apply a force to the clamping portion to press the bracket against the second limiting portion.

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