Near infrared spectrum analyzer

Abstract

The utility model discloses a near infrared spectrum analyzer and relates to the technical field of spectrum analysis. The near infrared spectrum analyzer comprises a shell, an optical window, at least one partition plate, a light source, a collection device, a detection device and a sample loading device. The optical window and the shell jointly form a closed inner cavity in a surrounding mode. The at least one partition plate is arranged in the inner cavity and divides the inner cavity into at least one transmitting cavity and at least one collecting cavity; the light source is arranged in the emission cavity; the collecting device is arranged in the collecting cavity; and the sample loading device is arranged outside the internal cavity and corresponds to the optical window. According to the design, the near-infrared light emitted by the light source and the light generated after the sample to be detected are respectively propagated in different chambers, so that the interference of the light of the light source on spectral signals collected by the detection device is avoided, the signal noise is reduced, and the accuracy of spectral data is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of spectrum analysis technology, in particular to a near infrared spectrum analyzer. BACKGROUND

[0002] Near infrared spectrum analysis technology is a kind of fast, efficient analysis method, is widely used in agriculture, food, medicine, petrochemical and multiple fields.Its basic principle is to analyze the characteristic of hydrogen group chemical bond in near infrared light absorption spectrum, and establishes correction model, to realize the quantitative or qualitative analysis of unknown sample.Near infrared spectrum analysis has the advantages such as fast analysis speed, low cost, suitable for online monitoring, and has made remarkable progress in multiple industries in recent years, and has been widely used.

[0003] The existing near infrared spectrum analyzer is usually composed of light source, detector and sample cup in the same space.The near infrared light emitted by the light source irradiates on the sample to be measured in the sample cup, and the light spectrum signal reflected or transmitted by the sample is received and analyzed by the detector, so as to obtain the spectrum information of the sample.

[0004] However, since the light source and the detector are located in the same space, the light emitted by the light source and the light generated after passing through the sample propagate in the same space, and the mutual interference will cause the light of the light source to affect the spectrum signal collected by the detector, increase the signal noise, and reduce the accuracy of the spectrum data. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the purpose of the utility model is to provide a kind of near infrared spectrum analyzer, to effectively solve the mutual interference problem caused by the coexistence of light source and detector in the same space.

[0006] The technical scheme provided by the utility model is as follows:

[0007] A kind of near infrared spectrum analyzer, comprising:

[0008] Shell;

[0009] Optical window, with the shell is collectively surrounded and forms airtight internal chamber;

[0010] At least one partition, is arranged in the internal chamber, and the internal chamber is divided into at least one emission cavity and collection cavity;

[0011] Light source, is arranged in the emission cavity, for emitting near infrared spectrum to irradiate sample to be measured;

[0012] Collection device, is arranged in the collection cavity, for obtaining and transmitting the light signal generated after passing through the sample to be measured;

[0013] A detection device is arranged outside the inner chamber and is configured to receive and analyze the light signal to obtain the spectral information of the sample.

[0014] A sample loading device is arranged outside the inner chamber and corresponds to the optical window, and is configured to place the sample.

[0015] Further, the number of the partition plates is two, which are arranged in the inner chamber and divide the inner chamber into two emission chambers and one collection chamber.

[0016] The collection chamber is located in the middle position, and the two emission chambers are located on the opposite sides of the collection chamber.

[0017] Further, the inner chamber has an isosceles trapezoidal structure, the shell includes a first shell arranged at the upper portion, and a second shell and a third shell arranged at the two sides, respectively, and the optical window is arranged at the lower portion.

[0018] The two partition plates are arranged in parallel and are spaced apart between the first shell and the optical window, and divide the inner chamber into a rectangular collection chamber and two triangular emission chambers.

[0019] Further, the included angle between the first shell and the optical window ranges from 10° to 80°.

[0020] Further, the number of the light sources matches the number of the emission chambers, and the light sources are installed on the shell and face the position of the optical window.

[0021] Further, the near-infrared spectrum analyzer further comprises a heat dissipation device, which is arranged on the shell and located close to the light source.

[0022] Further, the collection device comprises a coupling lens and an optical fiber, the coupling lens is used for coupling the light signal, and the optical fiber is used for transmitting the light signal.

[0023] Further, the coupling lens and the optical fiber are in a split structure, or the coupling lens and the optical fiber are in an integrated structure.

[0024] The optical fiber is installed on the shell, and one end of the optical fiber extends to the outside of the shell.

[0025] Further, the optical window is made of quartz glass.

[0026] Further, the near infrared spectrum analyzer further comprises a control system in communication with the light source, the collecting device and the detecting device, for controlling the switch and intensity of the light source, and for controlling the start and stop of the collecting device and the detecting device.

[0027] Compared with the prior art, the near infrared spectrum analyzer provided in the embodiment of the present application has at least the following technical effects:

[0028] The internal cavity is divided into an emitting cavity and a collecting cavity by at least one partition plate, the light source is located in the emitting cavity, and the collecting device is arranged in the collecting cavity. This structural design makes the near infrared light emitted by the light source and the light generated after the sample to be measured propagate in different cavities respectively, thereby avoiding the interference of the light of the light source on the spectrum signal collected by the detecting device, reducing the signal noise, and improving the accuracy of the spectrum data. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 Fig. 1 is a structural schematic diagram of a near infrared spectrum analyzer according to an embodiment of the present application.

[0031] Reference signs:

[0032] 10, housing; 20, optical window; 30, partition plate; 40, emitting cavity; 50, collecting cavity; 60, light source; 71, coupling lens; 72, optical fiber; 80, sample loading device; 90, heat dissipation device. DETAILED DESCRIPTION

[0033] In order to make those skilled in the art better understand the technical scheme in the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0034] It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, indicate the orientation or positional relationship based on the drawings shown, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In addition, the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of", "several" is two or more, unless otherwise explicitly specified.

[0037] It should be understood that the structure, proportion, size and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the specification, to enable those skilled in the art to understand and read, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that the present application can produce, should still fall within the scope of the technical content disclosed by the present application.

[0038] Please refer to the drawings Figure 1As shown, the utility model embodiment provides a kind of near infrared spectroscopy analyzer, including shell 10, optical window 20, at least one partition 30, light source 60, acquisition device, detection device and sample carrier device 80.Optical window 20 is enclosed with shell 10 and is formed into closed internal chamber;At least one partition 30 is arranged in internal chamber, and internal chamber is separated into at least one emission cavity 40 and acquisition cavity 50;Light source 60 is arranged in emission cavity 40, for emitting near infrared spectrum to irradiate sample to be measured;Acquisition device is arranged in acquisition cavity 50, for obtaining and transmitting the light signal generated after passing through sample to be measured;Detection device is arranged outside internal chamber, for receiving and analyzing light signal, to obtain the spectral information of sample to be measured;Sample carrier device 80 is arranged outside internal chamber and corresponds with the position of optical window 20, for placing sample to be measured.Wherein, light source 60 can be but not limited to halogen lamp.Optical window 20 can transmit near infrared spectrum, in addition, can effectively isolate light source 60 and acquisition device located in internal chamber from external environment, prevent dust and other external pollutants from entering internal chamber.

[0039] In the embodiment, internal chamber is divided into emission cavity 40 and acquisition cavity 50 by at least one partition 30, and light source 60 is located in emission cavity 40, and acquisition device is arranged in acquisition cavity 50.This structural design makes that near infrared light emitted by light source 60 and the light generated after sample to be measured respectively propagate in different chambers, to avoid the interference of light of light source 60 to the spectral signal collected by detection device, reduce signal noise, improve the accuracy of spectral data.

[0040] In some alternative embodiments, the number of partitions 30 is two, arranged in internal chamber, and internal chamber is separated into two emission cavities 40 and one acquisition cavity 50;Acquisition cavity 50 is located in the middle position, and two emission cavities 40 are respectively located on the opposite sides of acquisition cavity 50.The configuration of two emission cavities 40 ensures that light source 60 can irradiate sample to be measured from different angles, avoids the problem of uneven irradiation possibly caused by single light source.This design effectively reduces the influence of the difference of uniformity, granularity and flatness of the surface composition of sample to be measured on the accuracy of spectral data, while enhancing the intensity of incident light, thereby improving the stability and consistency of spectral signal.Acquisition cavity 50 is located in the middle position, which helps to concentrate and accurately collect the light signal generated after sample to be measured to the greatest extent, reduces the loss in the transmission process of light signal, and improves the accuracy of spectral data.

[0041] In some alternative embodiments, the internal cavity is in the shape of an isosceles trapezoid, the housing 10 comprises a first housing at the upper part, and a second housing and a third housing at the two sides respectively, and the optical window 20 is at the lower part; two partition plates 30 are arranged in parallel and at intervals between the first housing and the optical window 20, and divide the internal cavity into one rectangular-shaped collection cavity 50 and two triangular-shaped emission cavities 40.

[0042] In some alternative embodiments, the included angle between the first housing and the optical window 20 ranges from 10° to 80°. The light source 60 is installed on the first housing, so that the near-infrared spectrum emitted by the light source 60 can be irradiated onto the sample to be measured at a suitable angle, thereby optimizing the light incidence effect.

[0043] In near-infrared spectrum analysis, there are many factors that affect the accuracy of spectrum data, including the uniformity of the surface composition of the sample to be measured, the difference in particle size and flatness, the incidence angle of the light source, and the intensity of the light source. These factors can all affect the accuracy of spectrum data. Therefore, in the design process of the near-infrared spectrum analyzer, these factors must be fully considered and optimized to improve the accuracy and reliability of the accuracy of spectrum data.

[0044] In some alternative embodiments, a plurality of partition plates 30 are arranged in the internal cavity to divide the cavity into a plurality of emission cavities 40 and a collection cavity 50. Among them, the number of light sources 60 matches the number of emission cavities 40, and the light sources 60 are installed on the housing 10 and face the position of the optical window 20, so as to ensure that the near-infrared spectrum emitted by the light source 60 can pass through the optical window 20 and irradiate on the sample to be measured. The configuration of the plurality of emission cavities 40 allows the plurality of light sources 60 to simultaneously irradiate the sample to be measured from different angles, effectively reducing the influence of the uniformity of the surface composition of the sample, the difference in particle size and flatness on the accuracy of spectrum data, and enhancing the intensity of the incident light, thereby improving the stability and consistency of the spectrum signal.

[0045] In some alternative embodiments, the near-infrared spectrum analyzer further comprises a heat dissipation device 90, which is arranged on the housing 10 and located close to the light source 60. The heat dissipation device 90 can be, but is not limited to, a heat dissipation fan. Through the arrangement of the heat dissipation device 90, the heat generated by the light source 60 during operation can be effectively dissipated.

[0046] In some alternative embodiments, the collection device comprises a coupling lens 71 and an optical fiber 72, the coupling lens 71 is used to couple the light signal, and the optical fiber 72 is used to transmit the light signal. Specifically, the coupling lens 71 effectively couples the light signal generated after passing through the sample to be measured, so as to ensure that the light signal can smoothly enter the optical fiber 72. The optical fiber 72 is used to efficiently transmit the light signal, and the light signal collected by the coupling lens 71 is transmitted to the detection device.

[0047] In some optional embodiments, the coupling lens 71 and the optical fiber 72 are designed as a split structure, i.e., they are independent components. The split structure design allows the optical fiber 72 and the coupling lens 71 to be replaced or adjusted individually, thereby providing higher flexibility for maintenance and optimization. In addition, this design facilitates quick component replacement when a fault occurs or an upgrade is needed, reducing maintenance costs and time.

[0048] In other optional embodiments, the coupling lens 71 and the optical fiber 72 are designed as an integrated structure, i.e., they are designed as a whole component. The integrated structure is generally more compact, can provide higher optical interfacing accuracy, and reduce the loss of optical signals during transmission.

[0049] In some optional embodiments, the optical fiber 72 is mounted on the housing 10, and one end of the optical fiber 72 extends to the outside of the housing 10 to realize connection with the detection device.

[0050] In some optional embodiments, the optical window 20 is made of quartz glass. Quartz glass has excellent light transmission in the near-infrared waveband (usually 750 nm to 2500 nm), which can effectively transmit the near-infrared light emitted by the light source 60 and the optical signal generated after passing through the sample to be tested, reducing the loss of optical signals. This feature ensures the intensity and clarity of the spectral signal, which is particularly important for improving the sensitivity of the spectrometer when analyzing low-concentration samples.

[0051] In some optional embodiments, the near-infrared spectrometer further includes a control system, which is in communication connection with the light source 60, the acquisition device, and the detection device, for controlling the switching and intensity of the light source 60, and controlling the start and stop of the acquisition device and the detection device.

[0052] Specifically, the control system can control the switching state and light intensity of the light source 60 to ensure that the light source 60 provides stable and uniform light irradiation at the right time, and adjust the intensity of the light source 60 according to actual needs. For example, the control system can dynamically adjust the output intensity of the light source 60 according to the properties and test conditions of the sample to be tested, to avoid problems such as excessive irradiation or weak signals. In addition, the control system is also responsible for controlling the start and stop of the acquisition device and the detection device, to ensure that they are automatically started or stopped at the right time, avoiding unnecessary energy consumption or equipment wear and tear.

[0053] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A near infrared spectrometer, characterized by, The application relates to a near-infrared spectroscopy device, which comprises the following parts: a shell; an optical window, which cooperates with the shell to form a closed internal cavity; at least one partition plate, which is arranged in the internal cavity and divides the internal cavity into at least one emitting cavity and a collecting cavity; a light source, which is arranged in the emitting cavity and used for emitting near-infrared light to irradiate a sample to be measured; a collecting device, which is arranged in the collecting cavity and used for acquiring and transmitting light signals generated after passing through the sample to be measured; a detecting device, which is arranged outside the internal cavity and used for receiving and analyzing the light signals to acquire spectral information of the sample to be measured; a sample loading device, which is arranged outside the internal cavity and corresponds to the optical window and is used for placing the sample to be measured.

2. The near infrared spectroscopic analyzer according to claim 1, wherein, The number of the partition plates is two, which are arranged in the internal cavity and divide the internal cavity into two emitting cavities and one collecting cavity; The collecting cavity is located at a middle position, and the two emitting cavities are located on opposite sides of the collecting cavity.

3. The near infrared spectroscopic analyzer according to claim 2, wherein, The internal cavity has an isosceles trapezoidal structure, the shell comprises a first shell located at an upper portion and a second shell and a third shell located at two sides respectively, and the optical window is located at a lower portion; The two partition plates are arranged in parallel and are spaced apart between the first shell and the optical window, thereby dividing the internal cavity into a rectangular collecting cavity and two triangular emitting cavities.

4. The near infrared spectroscopic analyzer according to claim 3, wherein, The included angle between the first shell and the optical window ranges from 10 DEG to 80 DEG.

5. The near infrared spectroscopic analyzer according to claim 1, wherein, The number of the light sources matches the number of the emitting cavities, and the light sources are installed on the shell and face the position of the optical window.

6. The near infrared spectroscopic analyzer according to claim 5, wherein, The device further comprises a heat dissipation device, which is arranged on the shell and located close to the light sources.

7. The near infrared spectroscopic analyzer according to claim 1, wherein, The collecting device comprises a coupling lens and an optical fiber, the coupling lens is used for coupling light signals, and the optical fiber is used for transmitting light signals.

8. The near infrared spectroscopic analyzer according to claim 7, wherein, The coupling lens and the optical fiber have a split structure, or the coupling lens and the optical fiber have an integrated structure. The optical fiber is installed on the shell and one end of the optical fiber extends to the outside of the shell.

9. The near infrared spectroscopic analyzer according to claim 1, wherein, The optical window is made of quartz glass.

10. The near infrared spectroscopic analyzer according to any one of claims 1 to 9, characterized in that, The device further comprises a control system, which is in communication connection with the light source, the collecting device and the detecting device, and is used for controlling the on-off and intensity of the light source and controlling the start-stop of the collecting device and the detecting device.

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