CN214894827U - Spectral parameter calibration mechanism and classified screening device - Google Patents

Abstract

The application provides a spectral parameter calibration mechanism and a classified screening device; wherein, spectral parameter calibration mechanism includes: the light-emitting component can emit light; the light receiving component is positioned at one side of the light emitting component and can receive light emitted by the light emitting component; the light receiving assembly comprises a light adjusting piece, a light receiving body and a driving piece, the light adjusting piece is positioned between the light emitting assembly and the light receiving body, the light adjusting piece is provided with parts with different light transmittances, and the light intensity received by the light receiving body can be adjusted through the parts with the different light transmittances by the light adjusting piece; the driving piece is connected with the light adjusting piece, and the driving piece is used for driving the light adjusting piece to move so that the light receiving body receives different light intensities and calibrates spectral parameters. According to the spectral parameter calibration mechanism and the classified screening device provided by the application, the spectral parameter change caused by the change of the ambient light can be calibrated in time, and the accuracy of classified screening can be effectively improved.

Description

Spectral parameter calibration mechanism and classified screening device

Technical Field

The application relates to the technical field of automatic control, in particular to a spectral parameter calibration mechanism and a classified screening device.

Background

In automatic application, the spectrum data acquisition needs to carry out deduction comparison by using bright parameters and dark parameters to obtain the spectrum parameters and information under the current real environment; namely, environmental spectral parameter information of the measurement process is calibrated. For example, in the automatic sorting of fruits, the sugar degree of the fruits is generally determined by the spectral data, so that the fruits are classified and screened.

At present, when screening fruit, generally the spectral parameter to sugar degree screening installation is calibrated earlier, and after the calibration, fruit passes through from sugar degree screening installation through the assembly line, and screening installation measures and screens the sugar degree of fruit through spectral data.

However, in the related art, in the process of screening, the spectral parameters of the screening device cannot be calibrated again, and the change of the ambient light affects the screening accuracy, resulting in inaccurate classification screening.

SUMMERY OF THE UTILITY MODEL

The application provides a spectral parameter calibration mechanism and classified screening device to in solving the correlation technique, the change of ambient light can cause the influence to the degree of accuracy of screening, leads to the inaccurate technical problem of classified screening.

According to a first aspect of the present application, there is provided a spectral parameter calibration mechanism, a light emitting assembly and a light receiving assembly,

the light emitting component can emit light; the light receiving assembly is positioned at one side of the light emitting assembly and can receive light emitted by the light emitting assembly;

the light receiving assembly comprises a light adjusting piece, a light receiving body and a driving piece, the light adjusting piece is located between the light emitting assembly and the light receiving body, the light adjusting piece is provided with parts with different light transmittances, and the light intensity received by the light receiving body can be adjusted through the parts with the different light transmittances; the driving piece with the regulating part of adjusting is connected, the driving piece is used for the drive the regulating part of adjusting removes of adjusting is made to receive different luminous intensity of light body and calibration spectral parameter.

In a possible design, the light adjusting member includes a light filtering portion and a connecting portion, the light filtering portion is located the light emitting component and between the light collectors, the light filtering portion passes through the connecting portion with the driving member is connected, and the light filtering portion has each part of different light transmittances.

In one possible embodiment, the optical filter part comprises a first optical filter part, a second optical filter part and a third optical filter part; the first filter portion may entirely transmit light emitted from the light emitting device, the second filter portion may entirely block light emitted from the light emitting device, and the third filter portion may partially transmit light emitted from the light emitting device.

In a possible design, the first optical filter part, the second optical filter part and the third optical filter part are sequentially connected into an arc-shaped structure, the convex surface of the arc-shaped structure faces towards the light-emitting component, and the driving component is used for driving the light adjusting component to rotate around the axis of the arc-shaped structure.

In one possible embodiment, the light collector abuts against a concave surface of the arc-shaped structure.

In a possible design, the light collecting assembly further includes a first bracket, the light adjusting member, the light collecting body and the driving member are all mounted on the first bracket, and the first bracket is configured to be connected with the classifying and screening device.

In a possible design, the light emitting assembly includes a light emitting body and a second support, the light emitting body is disposed on the second support, the light emitting body can emit light, and the second support is configured to be connected with the step screening device.

In a possible design, the light emitting assembly further includes a sleeve, the sleeve is disposed on the second bracket, and the sleeve is disposed on the outer periphery of the light emitting body, and the sleeve can collect light emitted by the light emitting body.

In a possible design, the light emitting assembly further includes a collimating mirror mounted on the sleeve and located between the light emitter and the light collector.

According to a second aspect of the present application, there is provided a hierarchical screening apparatus comprising a spectral parameter calibration mechanism as provided in any one of the possible designs of the first aspect of the present application.

In the embodiment of the application, the light receiving assembly is arranged to comprise a light adjusting piece, a light receiving body and a driving piece; disposing a light adjusting member between the light collector and the light emitting element, and setting light transmittances of respective portions of the light adjusting member to be different; drive light regulating part through the driving piece and remove, thereby make each part of the different luminousness of light regulating part can be located respectively between light collector and the light emitting component, thereby adjust the luminous intensity that light collector received, make light collector form bright reference and dark reference through different luminous intensities and carry out the deduction ratio, spectral parameter calibrates promptly, deduct the interference that the ambient light change arouses, promptly in the screening process, can drive light regulating part through the driving piece, form bright reference and dark reference and calibrate the spectral parameter of screening installation, the spectral parameter's that can in time arouse the change of ambient light change is calibrated, can effectively improve the accuracy of screening in grades.

The construction of the present application and other objects and advantages thereof will be apparent from the following detailed description taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic diagram illustrating an overall structure of a first view angle of a spectral parameter calibration mechanism according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a light receiving assembly in the spectral parameter calibration mechanism according to the embodiment of the present application;

FIG. 3 is a schematic diagram illustrating an overall structure of a second view angle of the spectral parameter calibration mechanism according to the embodiment of the present application;

FIG. 4 is a front view of a spectral parameter calibration mechanism provided in an embodiment of the present application;

fig. 5 is a schematic overall structure diagram of a third viewing angle of the spectral parameter calibration mechanism according to the embodiment of the present application.

Description of reference numerals:

1-a spectral parameter calibration mechanism;

10-a light emitting component; 20-a light receiving component;

11-a luminophore; 12-a second scaffold; 13-a sleeve; 14-a collimating mirror; 21-a light adjuster; 22-a light collector; 23-a drive member; 24-a first scaffold;

210-a light filter section; 211-a first light filter portion; 212-a second light filter portion; 213-a third light-filtering portion; 220-connecting part.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the present application, it is to be understood that the terms "inner," "outer," "upper," "bottom," "front," "back," and the like, when used in the orientation or positional relationship indicated in FIG. 1, are used solely for the purpose of facilitating a description of the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Fig. 1 is a schematic overall structure diagram of a first viewing angle of a spectral parameter calibration mechanism according to an embodiment of the present application, and fig. 2 is a schematic structural diagram of a light receiving assembly in the spectral parameter calibration mechanism according to the embodiment of the present application.

Referring to fig. 1 and 2, according to a first aspect of embodiments of the present application, there is provided a spectral parameter calibration mechanism comprising: a light emitting assembly 10 and a light receiving assembly 20.

Specifically, in the embodiment of the present application, the light emitting element 10 may emit light, specifically, near infrared light, which may penetrate through an article (for example, fruits such as apples, oranges, peaches, etc.) to be graded and screened, and then be received by the light receiving element 20.

That is, the light receiving unit 20 is located at one side of the light emitting unit 10, and the light receiving unit 20 can receive the light emitted from the light emitting unit 10.

Specifically, referring to fig. 1, the light receiving module 20 and the light emitting module 10 may be disposed opposite to each other. It is understood that light travels in a straight line in the same medium, and thus the light receiving module 20 and the light emitting module 10 may be disposed in the same straight line, which can shorten the travel path of light, thereby making the entire structure simple.

Of course, in some possible ways, the light receiving module 20 and the light emitting module 10 may not be disposed on the same straight line. For example, in some cases, the light receiving assembly 20 and the light emitting assembly 10 may be disposed at an angle, and in this case, a reflective mirror (e.g., a mirror surface or a mirror) may be disposed on a propagation path of the light emitted from the light emitting assembly 10, so that the light receiving assembly 20 can receive the light emitted from the light emitting assembly 10.

The light receiving assembly 20 comprises a light adjusting member 21, a light receiving body 22 and a driving member 23, the light adjusting member 21 is located between the light emitting assembly 10 and the light receiving body 22, the light adjusting member 21 has various parts with different light transmittances, and the light adjusting member 21 can respectively adjust the light intensity received by the light receiving body 22 through the various parts with different transmittances; the driving member 23 is connected to the light adjusting member 21, and the driving member 23 is used for driving the light adjusting member 21 to move, so that the light receiving body 22 receives different light intensities and calibrates the spectral parameters.

Specifically, in the embodiment of the present application, the light transmittance of each portion of the light adjusting member 21 may be between 0% and 100%.

It is understood that, when the light transmittance is 0%, the light emitted from the light emitting element 10 is completely blocked by the light adjuster 21, and the light receiver 22 does not receive the light emitted from the light emitting element 10. In this case, since the light received by the light receiver 21 is ambient light, the data measured in this case can be used as the dark reference.

It should be noted that the data obtained by measuring the transmittance of 0% as the dark reference is only an exemplary illustration, and in some possible ways, the transmittance may be calibrated by using the transmittance lower than that of the bright reference as the dark reference.

Of course, when the light transmittance is 100%, the light emitted from the light emitting element 10 completely passes through the light adjuster 21, and the light receiver 22 can completely receive the light emitted from the light emitting element 10. In this case, the light received by the light receiver 21 is a mixture of the light emitted by the light emitting module 10 and the ambient light, and therefore, the data measured in this case can be used as the bright light.

And the spectral parameters of the current equipment can be obtained through the deduction ratio between the bright parameter and the dark parameter.

In order to ensure the sensitivity of the light collector 22, in the embodiment of the present application, it is necessary to ensure that the light intensity received by the light collector 22 is about 5.8w-6 w. Therefore, in the embodiment of the present application, the light transmittance of each portion of the light adjusting member 21 may be less than 100%.

Specifically, in the embodiment of the present application, the driving member 23 may be a servo motor, a stepping motor, a synchronous motor, or a piston cylinder, an air cylinder, or the like. The driving member 23 may move at an angle to the light propagation path (e.g., the direction shown by the dashed arrow in fig. 1) when driving the light adjusting member 21 to move. That is, the movement of the light adjusting member 21 causes the filter surfaces with different transmittances to be positioned on the light propagation path and to be irradiated with the light emitted from the light emitting element 10. For example, the light adjuster 21 may be moved in a direction perpendicular to the light propagation path, or the movement of the light adjuster 21 may be arcuate in shape, and the linear velocity of the light adjuster 21 is perpendicular to the light propagation path at a position where the light propagation path contacts the light adjuster 21. Of course, in some possible ways, the moving direction of the light adjusting member 21 may not be perpendicular to the light propagation path as long as the moving direction of the light adjusting member 21 is not parallel to the light propagation path.

In the embodiment of the present application, the light receiving assembly 20 is configured to include a light adjusting member 21, a light receiving body 22, and a driving member 23; the light adjusting member 21 is disposed between the light receiving body 22 and the light emitting module 10, and the light transmittance at each portion of the light adjusting member 21 is set to be different; drive light regulating part 21 through driving piece 23 and remove, thereby make each part of different luminousness can be located respectively between light-collecting body 22 and light-emitting component 10, thereby adjust the luminous intensity that light-collecting body 22 received, make light-collecting body 22 form bright reference and dark reference through different luminous intensities and carry out the deduction ratio, calibrate spectral parameter promptly, deduct the interference that the ambient light change arouses, promptly in the screening process, can drive light regulating part through driving piece 23, form bright reference and dark reference and calibrate the spectral parameter of screening installation, can in time calibrate the spectral parameter's that the change of ambient light arouses change, can effectively improve the accuracy of hierarchical screening.

Alternatively, in the embodiment of the present application, the light receiver 22 may be a light receiver, such as a photo resistor. The Light Emitting assembly 10 may include at least one Light source, which may be a Light Emitting Diode (LED) or other Light source (e.g., a halogen lamp) capable of Emitting near infrared Light or infrared Light.

Further, as shown in fig. 1 and fig. 2, in the embodiment of the present application, the light adjusting member 21 includes a light filtering portion 210 and a connecting portion 220, the light filtering portion 210 is located between the light emitting component 10 and the light receiving body 22, the light filtering portion 210 is connected to the driving member 23 through the connecting portion 220, and each portion of the light filtering portion 210 has different light transmittances.

Specifically, in the embodiment of the present application, the filter portion 210 and the connecting portion 220 may be integrally formed, or may be an integral structure formed by two-shot molding. In this way, the connection part 220 can support the filter part 210. In addition, each part with different light transmittance is arranged on the optical filter portion 210, so that when the optical filter portion 210 moves, the driving member 23 drives the optical filter portion 210 through the connecting portion 220, the driving member 23 does not block the optical filter portion 210, and the optical filter effect of the optical filter portion 210 can be effectively ensured.

Alternatively, as shown in fig. 2, in the embodiment of the present application, the filter portion 210 and the connection portion 220 may be integrally formed in an "L" shaped cross section. Thus, the overall occupied space of the light adjuster 21 can be reduced, the structure is compact, and the installation of other parts of the classifying and screening device is not affected.

Further, referring to fig. 2, in the embodiment of the present application, the optical filter portion 210 includes a first optical filter portion 211, a second optical filter portion 212, and a third optical filter portion 213.

Specifically, in the embodiment of the present application, the first filter portion 211, the second filter portion 212, and the third filter portion 213 may be sequentially connected together to form a rectangular, square, or polygonal structure. The driving member 23 can drive the optical filter portion 210 to move on a path perpendicular to the light path emitted by the light emitting module 10, so as to change the positions of the first optical filter portion 211, the second optical filter portion 212 and the third optical filter portion 213, i.e. to change the intensity of light received by the light receiver 22.

In particular, the movement in the horizontal direction, the movement in the vertical direction or the simultaneous movement in the horizontal and vertical directions may be possible.

It is understood that in the embodiment of the present application, the first optical filter portion 211 can totally transmit the light emitted from the light emitting device 10, the second optical filter portion 212 can totally block the light emitted from the light emitting device 10, and the third optical filter portion 213 can partially transmit the light emitted from the light emitting device 10.

That is, in the embodiment of the present application, the light transmittance of the first filter portion 211 may be 100%, the light transmittance of the second filter portion 212 may be 0%, and the light transmittance of the third filter portion 213 may be more than 0% and less than 100%.

In some specific examples, the first filter portion 211 may be a through hole as shown in fig. 2, for example, but the first filter portion 211 may also be made of a material having high light transmittance, such as transparent glass, a transparent acrylic plate, or the like.

In the embodiment of the present invention, the first light-filtering part 211 is made of transparent glass, transparent acrylic plate, or the like, so that when fruits are classified and screened, the light emitted from the light-emitting component 10 needs to pass through the fruits and then be received by the light-receiving body 22, and the fruits are classified and screened according to the light intensity that can be received by the light-receiving body 22. Those skilled in the art can understand that after the light emitted from the light emitting assembly 10 passes through the fruit, a part of the light can be absorbed by the fruit, the light intensity that can penetrate through the fruit is weak, and in order to ensure that the light collector 22 can accurately trigger or accurately receive the light emitted from the light emitting assembly 10, the first light filtering portion 211 is made of a material with high light transmittance, or directly adopts a through hole form.

In particular use, the second filter portion 212 may be used as a dark reference during calibration. As can be seen from the foregoing description, when calibrating the spectral parameters of the classifying screen device, it is necessary to avoid too much or too strong illumination on the light-receiving body 22, and therefore, the third filter portion 213 can be used as the light reference calibration. This prevents strong light from impinging on the light collector 22.

It is understood that in the embodiment of the present application, the light transmittance of the third filter portion 213 may be selected according to actual requirements, for example, by selecting the material or thickness of the third filter portion 213. Of course, both material and thickness considerations are also possible.

As a specific example, in the embodiment of the present application, the material of the third optical filter portion 213 may be teflon or ground glass, and the thickness may be between 0.5 mm and 2.0 mm. It should be noted that the numerical values and numerical ranges referred to in this application are approximate values, and there may be some error due to the manufacturing process, and the error may be considered to be negligible by those skilled in the art.

In order to reduce the space occupied by the optical filter portion 210 and the space required by the optical adjuster 21 when the driving member 23 drives the optical adjuster 21, referring to fig. 2, in the embodiment of the present application, the first optical filter portion 211, the second optical filter portion 212, and the third optical filter portion 213 are sequentially connected to form an arc-shaped structure.

Specifically, the first, second and third optical filter portions 211, 212 and 213 may be connected with each other at an angle, so as to form an arc structure. Thus, the driving member 23 can drive the light adjusting member 21 to rotate around the axis of the arc-shaped structure, and the linear velocity of the arc-shaped structure at the position irradiated with the light is perpendicular to the light propagation path when the arc-shaped structure rotates. In this way, the moving range of the light adjusting member 21 can be minimized, thereby reducing the space required for moving the light adjusting member 21.

It is understood that, in order to further reduce the moving distance of the light adjusting member 21, in the embodiment of the present application, the convex surface of the arc-shaped structure may be directed toward the light emitting element 10.

In the embodiment of the present application, the first optical filter portion 211, the second optical filter portion 212 and the third optical filter portion 213 may be connected in sequence, that is, the second optical filter portion 212 may be located between the first optical filter portion 211 and the third optical filter portion 213. In this way, in performing calibration, bright reference may be acquired by the third filter portion 213 first, and then dark reference may be acquired by the second filter portion 212. Thereby completing the calibration. After the calibration is completed, the first optical filter portion 211 may be directly rotated, and an object to be classified and screened (for example, various kinds of fruits) may be measured and classified and screened.

Alternatively, referring to fig. 1 and fig. 3, fig. 3 is a schematic overall structure diagram of a second viewing angle of the spectral parameter calibration mechanism according to the embodiment of the present application. In the embodiment of the present application, the light collecting surface of the light collecting body 22 is abutted against the concave surface of the arc-shaped structure.

Thus, the distance between the light collecting surface of the light collecting body 22 and the filter part 210 can be reduced, the light collecting rate of the light collecting body 22 can be improved, the light collecting body 22 can be prevented from receiving redundant ambient light, and the accuracy of fruit measurement during grading screening can be improved.

In particular use, the light emitting assembly 10 needs to be preheated since the light source needs to be stabilized just when the device is turned on. That is, after the light emitting assembly 10 is turned on, it is necessary to wait for a certain period of time before the calibration can be performed. Optionally, in this embodiment of the application, the waiting time may be 10 to 20 minutes, at this time, the driving element 23 drives the light adjusting element 21 to rotate, so that the second optical filter portion 212 directly faces the light emitted by the light emitting element 10, and thus the second optical filter portion 212 can block the light emitted by the light emitting element 10 from being irradiated on the light receiving body 22, and the light receiving body 22 can be prevented from being damaged by strong light intensity. After preheating is completed, light (ambient light) which can be received by the light collector 22 at this time is collected as dark parameter; then, the driving member 23 drives the light adjusting member 21 to rotate, so that the third light filtering portion 213 faces the light emitted by the light emitting assembly 10, the light emitted by the light emitting assembly 213 is received by the light receiving body 22 after passing through the third light filtering portion 213, and the light rays which can be received by the light receiving body 22 at this time are collected as the bright parameters, so that the spectral parameters of the classifying and screening device can be calibrated.

After the calibration is completed, the driving member 23 drives the light adjusting member 21 to rotate, so that the first light-filtering portion 211 is opposite to the light emitted by the light-emitting assembly 10, and thus the fruit can be classified and screened. After a period of screening, since the ambient light may change, for example, there is a difference between the ambient light in the morning and at noon or in the evening, the driving member 23 can drive the light adjusting member 21 to rotate at intervals, so that the second light filtering surface 212 is directly opposite to the light emitted by the light emitting assembly 10, and a current dark reference is obtained, thereby calibrating the spectral parameters at any time.

In the embodiment of the present application, the driving element 23 may be controlled by a controller, and may also be collected by the controller when the light intensity received by the light collector 22 is collected. The Controller may be a Central Processing Unit (CPU), a Micro Control Unit (MCU), a Programmable Logic Controller (PLC), a Field Programmable Gate Array (FPGA), or the like. The driving member 23 can rotate a certain angle according to a control signal of the controller, so that a certain portion of the optical filter portion 210 faces the light emitted from the light emitting module 10.

Alternatively, referring to fig. 1, fig. 3 and fig. 4, fig. 4 is a front view of a spectral parameter calibration mechanism provided in an embodiment of the present application. In the embodiment of the present application, the light receiving assembly 20 further includes a first bracket 24, and the light adjusting member 21, the light receiving body 22 and the driving member 23 are all mounted on the first bracket 24.

In particular, the first bracket 24 may be attached to the sizing device. Thus, the light adjuster 21, the light receiver 22 and the driver 23 can be easily attached.

Alternatively, the first bracket 24 may be fixedly connected to the classifying screen device by a connecting member such as a screw, a bolt or a bolt.

The light adjuster 21 may be connected to the first bracket 24 via a driving member 23. That is, the light adjuster 21 may not be directly connected to the first bracket 24.

Specifically, the connecting portion 220 of the light adjusting member 21 may be connected to the output shaft of the driving member 23, for example, by a coupling or a reducer.

Alternatively, referring to fig. 4 and 5, fig. 5 is a schematic overall structure diagram of a third viewing angle of the spectral parameter calibration mechanism according to the embodiment of the present application. The light emitting assembly 10 includes a light emitting body 11 and a second bracket 12, the light emitting body 11 is disposed on the second bracket 12, and the light emitting body 11 can emit light.

Wherein the second bracket 12 is connected to the classifying screen apparatus. In particular, the second support 12 may be attached to the sizing device in the same manner as the first support 24, and reference may be made in particular to the attachment of the first support 24 to the sizing device.

Alternatively, in the embodiment of the present application, the light emitting body 11 may be one of the aforementioned LED lamp or halogen lamp.

In this way, the luminous bodies 11 can be easily mounted on the classifying and screening device.

Optionally, as shown in fig. 4 and fig. 5, in the embodiment of the present application, the light emitting assembly 10 further includes a sleeve 13, the sleeve 13 is disposed on the second bracket 12, and the sleeve 13 is disposed on the outer periphery of the light emitting body 11.

In particular, in the present embodiment, the sleeve 13 may be a black sleeve or a completely opaque sleeve, such as a black rigid plastic-supported sleeve. The interior of the sleeve 13 may be tapered, funnel-shaped or triangular, so that the sleeve 13 converges the light emitted from the light-emitting body 11 to form a linearly propagating light beam.

Alternatively, a reflective layer may be provided on the inner wall of the sleeve 13, for example by applying a reflective coating. Thus, a better convergence effect can be achieved.

It will be appreciated that a light outlet may be provided at the end of the sleeve 13 facing the light receiving assembly 20, the axis of the light outlet being collinear with the axis of the light emitter 11 and the diameter of the light outlet being smaller than the diameter of the light emitter 11. In this way, it is avoided that the light emitted by the light emitter 10 diverges and the light collector 22 receives an invalid light signal. The accuracy of the calibration of the spectral parameters can be improved.

Further, referring to fig. 1, 3 and 5, in the embodiment of the present application, the light emitting assembly 10 further includes a collimating mirror 14, and the collimating mirror 14 is mounted on the sleeve 13 and located between the light emitting body 11 and the light receiving body 22.

Specifically, in the embodiment of the present application, the collimating mirror 14 may be disposed in the light exit hole. Alternatively, the collimator 14 may be a flat mirror. By arranging the collimating lens 14, it can be ensured that light emitted from the light-emitting hole can be linearly propagated to the light-receiving body 22, and the light-receiving body 22 can receive effective optical signals.

According to a second aspect of embodiments of the present application, there is provided a hierarchical screening apparatus comprising a spectral parameter calibration mechanism 1 as provided in any alternative to the first aspect of embodiments of the present application.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A spectral parameter calibration mechanism, comprising: a light emitting component (10) and a light receiving component (20),

the light emitting assembly (10) can emit light; the light receiving component (20) is positioned at one side of the light emitting component (10), and the light receiving component (20) can receive the light emitted by the light emitting component (10);

the light receiving assembly (20) comprises a light adjusting piece (21), a light receiving body (22) and a driving piece (23), the light adjusting piece (21) is located between the light emitting assembly (10) and the light receiving body (22), the light adjusting piece (21) is provided with parts with different light transmittances, and the light intensity received by the light receiving body (22) can be adjusted through the parts with the different transmittances by the light adjusting piece (21); the driving piece (23) with light regulating part (21) is connected, driving piece (23) are used for the drive light regulating part (21) removes, so that light-collecting body (22) receives different luminous intensities and calibrates spectral parameter.

2. The mechanism according to claim 1, wherein said light conditioning member (21) comprises a light filter portion (210) and a connecting portion (220), said light filter portion (210) being located between said light emitting element (10) and said light collector (22), said light filter portion (210) being connected to said driving member (23) through said connecting portion (220), said light filter portion (210) having portions with different light transmittances.

3. A spectral parameter calibration mechanism according to claim 2, wherein the optical filter portion (210) comprises a first optical filter portion (211), a second optical filter portion (212) and a third optical filter portion (213); the first filter portion (211) can totally transmit the light emitted by the light emitting component (10), the second filter portion (212) can totally block the light emitted by the light emitting component (10), and the third filter portion (213) can partially transmit the light emitted by the light emitting component (10).

4. The mechanism according to claim 3, wherein the first optical filter portion (211), the second optical filter portion (212) and the third optical filter portion (213) are sequentially connected to form an arc-shaped structure, a convex surface of the arc-shaped structure faces the light emitting component (10), and the driving member (23) is configured to drive the light adjusting member (21) to rotate around an axial center of the arc-shaped structure.

5. The spectral parameter calibration mechanism of claim 4, wherein the light collector (22) abuts a concave surface of the arcuate structure.

6. The spectral parameter calibration mechanism of any of claims 1-5, wherein the light harvesting assembly (20) further comprises a first bracket (24), the light conditioning member (21), the light harvesting body (22), and the driving member (23) are all mounted on the first bracket (24), and the first bracket (24) is configured to be connected to a step screening device.

7. The spectral parameter calibration mechanism of claim 1, wherein the light emitting assembly (10) comprises a light emitter (11) and a second support (12), the light emitter (11) being disposed on the second support (12), the light emitter (11) emitting light, the second support (12) being configured to be connected to a step screening device.

8. The mechanism according to claim 7, wherein said light emitting assembly (10) further comprises a sleeve (13), said sleeve (13) is disposed on said second support (12), and said sleeve (13) is disposed around said light emitting body (11), said sleeve (13) being capable of collecting light emitted from said light emitting body (11).

9. The spectral parameter calibration mechanism of claim 8, wherein the light emitting assembly (10) further comprises a collimating mirror (14), the collimating mirror (14) being mounted on the sleeve (13) and located between the light emitter (11) and the light collector (22).

10. A hierarchical screening apparatus comprising a spectral parameter calibration mechanism (1) according to any one of claims 1 to 9.

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