Spectrum acquisition system

Abstract

The invention provides a spectrum acquisition system. The spectrum acquisition system of the present invention 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 invention relates to the field of testing, and in particular provides a spectrum acquisition system. Background Art

[0002] The near infrared spectrometer in the prior art mostly adopts the following method: the spectrometer and the light source are arranged opposite each other, and the light emitted by the light source is transmitted through the sample or standard film and then into the spectrometer. A movable part is set between the light source and the spectrometer, and the movable part has four positions including the sample position, the reference position, the standard film position, and the dark current position. By moving the component horizontally, the spectrometer can collect sample spectra, collect references, collect dark currents, and collect standard samples.

[0003] Since the switching between the standard sample station and the sample station requires lateral movement, and the transmission mechanism in the prior art is mostly composed of gear racks, screws, and crank slider mechanisms, the measurement accuracy is not high due to the accuracy of the moving parts. In addition, the movement of the sample station will also involve the wear of the optical path related structural parts.

[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 workstation switching device in the spectral acquisition system in the prior art is not accurate enough, thus affecting the measurement accuracy, the present invention provides a spectral acquisition system. The spectral acquisition system of the present invention comprises: a light source; a spectrometer, the spectrometer and the light source are arranged opposite to each other; a workstation switching device, the workstation switching device comprises a bracket, a driving device and a plurality of workstations arranged on the bracket, the bracket has a bracket shaft, the plurality of workstations are arranged at intervals along the circumference of the bracket shaft, the driving device can 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 is elastically connected to the bracket through an elastic member; and a positioning device, the positioning device comprises a limiting portion, the bracket can be pressed 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 light source and the spectrometer of the present invention are arranged relative to each other, and the spectrometer can obtain the corresponding spectrum by receiving the light emitted from the light source and passing through the sample or the standard film. A bracket, a driving device and a plurality of stations arranged on the bracket, the bracket has a bracket shaft, the plurality of stations are arranged at intervals along the circumference of the bracket shaft, the driving device can drive the bracket to rotate around the bracket shaft, so that any of the stations can be positioned between the light source and the spectrometer, through the above configuration, the switching of the plurality of stations is no longer achieved by lateral movement, thereby avoiding the involvement of the optical path related structural parts and preventing their wear. The driving device is elastically connected to the bracket through an elastic member, and the bracket can be abutted against the limiting part through the force applied by the elastic member, so that one of the plurality of stations is positioned between the light source and the spectrometer. Through the above arrangement, the limiting part ensures that the one of the plurality of stations that needs a higher positioning accuracy can be accurately positioned, avoiding the error caused by the transmission components in the driving device, and also 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 spectrum acquisition system, the multiple workstations include a reference position and a sample position, and the limiting portion includes a first limiting portion and a second 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. Through the above-mentioned arrangement, the reference position and the sample are both accurately positioned through the limiting portion, 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, forming an effective spectrum in the spectrometer.

[0008] In the preferred technical solution of the above-mentioned spectrum acquisition system, the positioning device also includes an identification unit arranged on each of the workstations, and when the identification unit meets the predetermined conditions, the corresponding workstation is positioned between the light source and the spectrometer; when the identification unit on the reference position meets the predetermined conditions, after a predetermined time, the driving device stops driving the bracket to rotate and the bracket abuts against the first limit portion under the force applied by the elastic member; or when the identification unit on the sample position meets the predetermined conditions, after a predetermined time, the driving device stops driving the bracket to rotate and the bracket abuts against the second limit portion under the force applied by the elastic member. 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 bracket can fully abut against the limit portion. Even if the bracket abuts against the limit portion within a predetermined time period and the driving device is still running, the elastic member can absorb the vibration generated by the driving device and the excess pressure of the bracket on the limit portion.

[0009] 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 bracket to rotate. 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 part 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.

[0010] In the preferred technical solution of the above-mentioned spectrum acquisition system, 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-through hole on the workstation where the recognition unit is located.

[0011] In the preferred technical solution of the above-mentioned spectrum acquisition system, the positioning device includes an optical coupling sensor, and the identification unit is a sensor trigger sheet. When the sensor trigger sheet triggers the optical coupling sensor, the identification unit meets a predetermined condition. Through the above-mentioned setting, the optical coupling sensor can accurately identify the relative position between the workstation and itself.

[0012] In the preferred technical solution of the above-mentioned spectrum acquisition system, 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, and 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. Through the above-mentioned arrangement, the clamping claw ensures that the driving device and the bracket can form a transmission, while the first side wall and the second side wall respectively achieve the effect of pressing the bracket tightly against the first limiting portion and the second limiting portion.

[0013] In the preferred technical solution of the above spectrum acquisition system, the driving device further includes a motor and a connecting rod mechanism, one end of the connecting rod mechanism is connected to the output shaft of the motor, and the other end thereof is connected to the bracket through the elastic member. Through the setting of the connecting rod mechanism, the setting position between the bracket and the motor is more flexible, so as to facilitate the spatial arrangement of the spectrum acquisition system.

[0014] In a preferred technical solution of the above-mentioned spectrum acquisition system, the connecting rod mechanism includes a first connecting rod and a second connecting rod that are rotatably connected, the first connecting rod is connected to the output shaft, and the elastic member is connected to the second connecting rod.

[0015] In the preferred technical solution of the above-mentioned spectrum acquisition system, the bracket includes a clamping portion, the clamping portion and the bracket shaft are spaced apart from each other, and the elastic member is rotatably connected to the clamping portion. Through the above-mentioned arrangement, a four-bar linkage is formed between the bracket shaft and the output shaft of the motor, and the motor-driven station switching has high flexibility. 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 schematic structural diagram of an embodiment of a spectrum acquisition system of the present invention;

[0018] Figure 2 It is a structural schematic diagram of a bracket embodiment of the spectrum acquisition system of the present invention;

[0019] Figure 3 is with Figure 1 A schematic structural diagram of an embodiment of a spectrum collection system with opposite viewing angles;

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

[0021] Figure 5 This is a schematic diagram of the structure of an embodiment of the spectrum acquisition system of the present invention when acquiring dark current spectrum.

[0022] Figure 6 It is a schematic structural diagram of an embodiment of the spectrum acquisition system of the present invention when acquiring a reference spectrum;

[0023] Figure 7 It is a schematic diagram of the structure of the spectrum acquisition system of the embodiment of the present invention when acquiring a sample spectrum.

[0024] List of reference numerals:

[0025] 100. Spectral acquisition system; 10. Light source; 20. Spectrometer; 30. Workstation switching device; 31. Bracket; 311. Bottom plate; 312. Side wall; 313. Bracket shaft; 314. Clamping part; 32. Workstation; 321. Reference position; 322. Sample position; 323. Standard film position; 324. Dark current position; 325. Light hole; 33. Driving device; 331. Motor; 332. Link mechanism; 3321. First link; 3312. Second link; 333. Elastic member; 3331. Clamping claw; 33311. First side wall; 33312. Second side wall; 40. Intermediate frame; 41. First collimator; 42. Second collimator; 50. Positioning device; 51. Limiting part; 511. First limiting part; 512. Second limiting part. 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 station switching device in the spectrum acquisition system in the prior art is not accurate enough, thus affecting the measurement accuracy, the present invention provides a spectrum acquisition system 100. The spectrum acquisition system 100 of the present invention comprises: a light source 10; a spectrometer 20, the spectrometer 20 and the light source 10 are arranged opposite to each other; a station switching device 30, the station switching device 30 comprises a bracket 31, a driving device 33 and a plurality of stations 32 arranged on the bracket 31, the bracket 31 has a bracket rotating shaft 313, and the plurality of stations 32 are arranged at intervals along the circumference of the bracket rotating shaft 313, the driving device 33 can drive the bracket 31 to rotate around the bracket rotating shaft 313, so that any station 32 can be positioned between the light source 10 and the spectrometer 20, and the driving device 33 is elastically connected to the bracket 31 through an elastic member 333; and a positioning device 50, the positioning device 50 comprises a limiting portion 51, the bracket 31 can be pressed against the limiting portion 51 by the force applied by the elastic member 333, so that one of the plurality of stations 32 is positioned between the light source 10 and the spectrometer 20.

[0030] Figure 1 Schematic diagram of the structure 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 station switching device 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 40. A coaxial first collimator 41 and a second collimator 42 are provided on the intermediate frame 40. The light emitted from the light source 10 enters the first collimator 41. The light collimated by the first collimator 41 can pass through one of the stations 32 on the station switching device 30 and enter the second collimator 42. The light processed by the second collimator 42 finally enters the spectrometer 20 to form a spectrum. Alternatively, the optical axes of the first collimator 41 and the second collimator 42 can also be parallel to each other or form an angle, and other optical paths for turning only need to be provided between the first collimator 41 and the second collimator 42. Alternatively, the first collimator 41 and the second collimator 42 can also be provided at other suitable positions of the spectrum acquisition system 100.

[0031] Figure 2 Schematic diagram of the structure of the support embodiment of the spectrum acquisition system of the present invention. Figure 1 and Figure 2 As shown, the station switching device 30 includes a bracket 31 and a plurality of stations 32 arranged on the bracket 31. In one or more embodiments, Figure 1 As a top view of the spectrum acquisition system 100, the bracket 31 includes a horizontally extending bottom plate 311 and a vertically extending side wall 312. The side wall 312 is connected to the bottom plate 311, and the connection method includes but is not limited to screw connection, clamping connection, riveting, etc. Alternatively, Figure 1It can also be seen as a view of the spectrum collection system 100 from other directions, such as a side view, that the bottom plate 311 extends in the vertical direction.

[0032] Continue reading Figure 2 In one or more embodiments, a plurality of workstations 32 are arranged on the side wall 312. The plurality of workstations 32 include a reference position 321, a sample position 322, a standard film position 323, and a dark current position 324. The reference position 321 and the sample position 322 are respectively arranged on opposite sides of the side wall 312. The standard film position 323 and the dark current position 324 are arranged between the reference position 321 and the sample position 322. The reference position 321, the sample position 322, and the standard film position 323 are provided with a light-through hole 325, so that light can pass through the sample, the standard film, the reference plate, etc., so as to generate a spectrum in the spectrometer 20. The dark current position 324 can be arranged at a position of the side wall 312 where the light-through hole 325 is not arranged, so as to cut off the light provided by the light source 10 to the spectrometer 20 and collect the dark current spectrum. Exemplarily, the dark current position 324 can be arranged at the corners of the side wall 312. Alternatively, the setting of the standard film position 323 can also be cancelled.

[0033] Continue reading Figure 1 and Figure 2 The bracket 31 has a bracket shaft 313, and the bracket 31 can rotate around the bracket shaft 313. In one or more embodiments, the bottom plate 311 is configured to be roughly fan-shaped, and the bracket shaft 313 is arranged at the center of the fan and perpendicular to the bottom plate 311 (based on Figure 1 The side wall 312 extends substantially along the circumference of the support shaft 313, so that the plurality of workstations 32 can be arranged at intervals along the circumference of the support shaft 313. Alternatively, the support 31 can also be configured into other suitable shapes according to actual needs, as long as the plurality of workstations 32 are arranged at intervals along the circumference of the support shaft 313.

[0034] Continue reading Figure 1 The station switching device 30 further includes a driving device 33. The driving device 33 can drive the bracket 31 to rotate around the bracket shaft 313, so that any station 32 can be positioned between the light source 10 and the spectrometer 20, specifically, between the first collimator 41 and the second collimator 42.

[0035] Figure 3 is with Figure 1 A schematic diagram of the structure of an embodiment of a spectrum collection system with opposite viewing angles. Figure 3 As shown, in one or more embodiments, the driving device 33 includes a motor 331 and a connecting rod mechanism 332, one end of the connecting rod mechanism 332 is connected to the output shaft of the motor 331, and the other end thereof is connected to the bracket 31, so as to drive the corresponding workstation 32 to rotate to a suitable position through the motor 331.

[0036] Figure 4 FIG. 1 is a schematic diagram of the structure 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 connecting rod mechanism 332 includes a first connecting rod 3321 and a second connecting rod 3312 that are rotatably connected. The first connecting rod 3321 is connected to the output shaft of the motor 331. The first connecting rod 3321 can have a variety of expressions. For example, the first connecting rod 3321 can be configured as a slender rod or an eccentric disc. The second connecting rod 3312 is rotatably connected to the bracket 31, so that the first connecting rod 3321 is driven by the motor 331, and the first connecting rod 3321 transmits the displacement and rotation to the second connecting rod 3312, thereby driving the bracket 31 to rotate around the bracket shaft 313. Further, the second connecting rod 3312 is rotatably connected to the clamping portion 314 on the bracket 31, and the clamping portion 314 is spaced apart from the bracket shaft 313, so that the output shaft of the motor 331 and the bracket shaft 313 are roughly formed in the form of a four-bar linkage, so as to flexibly configure the spatial layout of the driving device 33. The clamping portion 314 may be disposed on the bottom plate 311 or at other suitable positions 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 further includes an elastic member 333. In one or more embodiments, the elastic member 333 is disposed on the connecting rod mechanism 332, and illustratively, can be disposed on the second connecting rod 3312. Alternatively, the elastic member 333 can also be disposed 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 jaw 3331 connected to the clamping portion 314 and including a clamping jaw 3331 surrounding the outside of the clamping portion 314. The clamping jaw 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, so that forces can be applied to the clamping portion 314 from two opposite directions. The number of the clamping jaws 3331 can be configured as 2, each of the clamping jaws 3331 includes a first side wall 33311 and a second side wall 33312, and the area surrounded by the two clamping jaws 3331 accommodates the clamping portion 314 so that it can be rotatably connected to the clamping portion 314. Alternatively, the clamping jaws 3331 can also be set to other suitable numbers, such as 1, 3, etc.

[0038] Continue reading Figure 1, the spectrum acquisition system 100 also includes a positioning device 50. The positioning device 50 includes a limiting portion 51 for limiting the rotation of the bracket 31. The bracket 31 can be pressed against the limiting portion 51 through the force applied by the elastic member 333, so that one of the multiple workstations 32 is positioned between the light source 10 and the spectrometer 20. Specifically, the bottom plate 311 can be pressed against the limiting portion 51. In one or more embodiments, the limiting portion 51 includes a first limiting portion 511 and a second limiting portion 512 respectively arranged on both sides of the bracket 31. When the driving device 33 drives the bracket 31 to press against the first limiting portion 511, the reference position 321 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 light hole 325 on the reference position 321. When the driving device 33 drives the bracket 31 to abut against the second limiting portion 512, the sample position 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 hole 325 on the sample position 322. Compared with directly driving the bracket 31 to rotate and abut against the limiting portion 51 through the motor 331, the technical solution of indirectly abutting the bracket 31 against the limiting portion 51 by providing a force through the elastic member 333 can avoid the problem that the bracket 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 bracket 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 includes an identification unit disposed on each station 32, and when the identification unit meets a predetermined condition, the corresponding station 32 is positioned between the light source 10 and the spectrometer 20. Exemplarily, when the identification unit on the reference position 321 meets a predetermined condition, the reference position 321 is positioned between the light source 10 and the spectrometer 20. Further, in the process of the driving device 33 driving the bracket 31 to rotate, when the identification unit on the reference position 321 meets a 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 first limit portion 511 under the force applied by the elastic member 333 (the force is provided by the first side wall 33311). By setting a predetermined time, the driving device 33 stops with a delay, so that when the driving device 33 has a transmission error and cannot fit on the first limit portion 511, it can continue to rotate toward the first limit portion 511. On the other hand, even if the bracket 31 has been against the first limit portion 511 when the identification unit meets the predetermined condition, the reaction force of the bracket 31 will not cause excessive pressure on the inside of the driving device 33 under the action of the elastic member 333, and the vibration generated by the driving device 33 can also be absorbed by the elastic member 333, thereby improving the positioning accuracy of the reference position 321. When the bracket 31 is repeatedly rotated to repeatedly obtain the reference, the position of the reference position 321 can always remain consistent.

[0040] Similarly, when the identification unit on the sample position 322 meets the predetermined condition, the sample position 322 is positioned between the light source 10 and the spectrometer 20. Further, in the process of the driving device 33 driving the bracket 31 to rotate, when the identification unit on the sample position 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 limit portion 512 under the force applied by the elastic member 333 (the force is provided by the second side wall 33312). Through the above-mentioned setting, the sample position 322 with high positioning accuracy requirements can also be tightly abutted against the second limit portion 512, so as to accurately position and ensure that the position of the sample position 322 remains consistent when the sample spectrum is repeatedly acquired by reciprocating rotation of the bracket 31.

[0041] Continue reading Figure 1 In one or more embodiments, the limiting portion 51 is fixedly connected to the middle frame 40. Alternatively, the limiting portion 51 may also be disposed at other suitable positions on the spectrum acquisition system 100. In alternative embodiments, the limiting portion 51 may also include a portion other than the first limiting portion 511 and the second limiting portion 512 to accurately position other workstations 32.

[0042] In one or more embodiments, the collection of dark current spectrum and standard film spectrum is less affected by the positioning accuracy of the workstation 32, so when the identification unit on the standard film position 323 or the dark current position 324 meets the predetermined condition, the driving device 33 stops driving the bracket 31 to rotate. Alternatively, the dark current and standard film spectra can be collected by other methods 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 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 40 near the second collimator 42, so that whenever the optical coupling sensor is triggered by the sensor trigger sheet, the light hole 325 on the corresponding workstation 32 is roughly aligned with the second collimator 42, and the light can pass through the light 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 workstation 32.

[0044] Figure 5 It is a schematic structural diagram of an embodiment of the spectrum acquisition system of the present invention when acquiring a dark current spectrum; Figure 6 It is a schematic structural diagram of an embodiment of the spectrum acquisition system of the present invention when acquiring a reference spectrum; Figure 7 1 is a schematic diagram of the structure of an embodiment of the spectrum acquisition system of the present invention when acquiring a sample spectrum. The following describes the method of using the present invention in combination with the above structure. Figure 5As shown, in one or more embodiments, when the light-through hole 325 on any station 32 is not aligned with the first collimating mirror 41 and the second collimating mirror 42, the dark current spectrum can be collected first. Figure 1 Then, the driving device 33 is controlled to make the bracket 31 abut against the first limit portion 511, so as to ensure that the light hole on the reference position 321 is aligned with the first collimator 41 and the second collimator 42 with high precision, and the reference spectrum is collected. Figure 6 As shown, the bracket 31 is then rotated counterclockwise to align the light hole 325 of the standard film position 323 with the first collimator 41 and the second collimator 42 to collect the standard film spectrum. Figure 7 As shown, finally, the driving device 33 is controlled to make the bracket 31 abut against the second limit portion 512 to ensure that the light hole on the sample position 322 is aligned with the first collimator 41 and the second collimator 42 with high precision to collect the spectrum of the sample.

[0045] In an alternative embodiment, when there is a light hole 325 aligned with the first collimator 41 and the second collimator 42 at the beginning, it is determined whether it is the light hole 325 on the reference position 321 or the sample position 322. If it is, the bracket 31 still needs to be pressed against the corresponding limit portion 51 by the driving device 33; if not, it means that the positioning accuracy required for the station 32 is relatively 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 collimator 41 and the second collimator 42.

[0046] 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 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, comprising a bracket, a driving device and a plurality of workstations arranged on the bracket, wherein the bracket has a bracket rotating shaft, the plurality of workstations are arranged at intervals along the circumference of the bracket rotating shaft, the driving device can drive 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, and the driving device is elastically connected to the bracket through an elastic member; and A positioning device, the positioning device comprising a first limiting portion and a second limiting portion, the bracket can abut against the limiting portion through the force applied by the elastic member, so that one of the plurality of stations is positioned between the light source and the spectrometer, the positioning device also comprising an identification unit provided on each of the stations, when the identification unit meets a predetermined condition, the corresponding station is positioned between the light source and the spectrometer; Wherein, the plurality of workstations include a reference position and a sample position, and 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; 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 limit portion under the force applied by the elastic member; or when the identification unit on the sample position meets the predetermined condition, after a predetermined time, the driving device stops driving the bracket to rotate and the bracket abuts against the second limit portion under the force applied by the elastic member.

2. The spectrum acquisition system according to claim 1, 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.

3. The spectrum acquisition system according to claim 1, characterized in that: Any of the above mentioned 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-through hole on the station where the recognition unit is located.

4. The spectrum acquisition system according to claim 1, 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.

5. The spectrum acquisition system according to claim 1, 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.

6. The spectrum acquisition system according to claim 1, characterized in that: The driving device further comprises a motor and a connecting rod mechanism, one end of the connecting rod mechanism is connected to the output shaft of the motor, and the other end of the connecting rod mechanism is connected to the bracket through the elastic member.

7. The spectrum acquisition system according to claim 6, characterized in that: The connecting rod mechanism comprises a first connecting rod and a second connecting rod which are rotatably connected, the first connecting rod is connected to the output shaft, and the elastic member is connected to the second connecting rod.

8. The spectrum acquisition system according to claim 7, characterized in that: The bracket comprises a clamping portion, the clamping portion and the bracket rotating shaft are spaced apart from each other, and the elastic member is rotatably connected to the clamping portion.

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