Raman spectrum test sample table and test method

Abstract

The invention discloses a Raman spectrum test sample table and a test method, the Raman spectrum test sample table comprises a base, an objective table, a sealing cover and a stud, the base is provided with a through hole penetrating through the upper end and the lower end, the stud is arranged in the through hole, and the sealing cover is arranged on the surface of the base; an accommodating space is formed among the bottom surface of the sealing cover, the upper end surface of the stud and the inner wall of the through hole; the objective table is arranged in the accommodating space and is arranged at the upper end of the stud; an internal thread is arranged on the inner side of the through hole, and an external thread is arranged on the outer side of the stud, so that the objective table is pushed to ascend or descend in the accommodating space; the sealing cover is provided with a transparent observation window; a cavity is formed between the bottom face of the stud and the inner wall of the through hole, and a rotary knob is arranged on the bottom face of the stud in a protruding mode or an inserting groove is formed in the bottom face of the stud in a sunken mode so as to drive the stud to rotate. The device can perform waterproof isolation on a sample in a test, is convenient to use, and effectively improves the test accuracy.

Description

Technical Field

[0001] The invention relates to a Raman spectrum testing device, in particular to a Raman spectrum testing sample platform and a testing method. Background Art

[0002] Raman spectrometer is mainly composed of light source, dispersion system, reaction cell, receiving and information processing system. Raman spectroscopy obtains information about molecular vibration or rotation by analyzing the frequency difference between scattered light and incident light. This method does not require sample pretreatment or preparation, is easy to operate, has a short measurement time and high sensitivity, and is one of the most direct methods for studying the molecular structure of materials.

[0003] In the process of testing lithium battery material samples with Raman spectrometer, the sample stage is needed for corresponding assistance. However, in the existing Raman detection field, the sample stage for conventional testing is a glass slide, whose height is fixed and cannot be adjusted, and can only meet the testing of powdered samples. At the same time, the glass slide is exposed to the air for testing, and some of the lithium battery materials currently studied and produced are sensitive to moisture and humid air. When exposed to the air for Raman testing and analysis, samples that are sensitive to moisture react with water in this process to produce other products or change their own structure after absorbing water, resulting in the inability to complete the test and analysis or causing the analysis results to deviate significantly from reality. Therefore, moisture-sensitive materials need to be tested in a dry environment in order to effectively perform qualitative and quantitative analysis. These limit the application range and measurement accuracy of Raman instruments, so it is necessary to develop a simple and practical sample stage for Raman testing. Summary of the invention

[0004] The object of the present invention is to provide a Raman spectrum test sample table which can waterproof and isolate samples during testing, is easy to use, and effectively improves test accuracy.

[0005] Another object of the present invention is to provide a Raman spectrum testing method with convenient testing and high accuracy.

[0006] In order to achieve the above-mentioned purpose, the Raman spectroscopy test sample platform provided by the present invention includes a base, a stage, a sealing cover and a stud, the base is provided with a through hole passing through the upper and lower ends, the stud is arranged in the through hole, the sealing cover is arranged on the surface of the base, and can open or seal the through hole; an accommodating space is formed between the bottom surface of the sealing cover, the upper end surface of the stud and the inner wall of the through hole; the stage is placed in the accommodating space and is arranged at the upper end of the stud; the inner side of the through hole is provided with an internal thread, and the outer side of the stud is provided with an external thread matching the internal thread to push the stage to rise or fall in the accommodating space; the sealing cover has a transparent observation window; a cavity is provided between the bottom surface of the stud and the inner wall of the through hole, and the bottom surface of the stud is provided with a knob protrudingly or a slot recessedly to drive the stud to rotate.

[0007] Compared with the prior art, the present invention forms a through hole on the base, sets a sealing cover on the surface of the base for opening or closing the through hole, and screws the stud into the through hole, thereby forming a sealed accommodation space for accommodating the sample. After the sample is carried by the stage, the stage is placed in the accommodation space, thereby isolating the sample from the outside world, preventing the sample from absorbing surrounding moisture during the test and affecting the test results, and effectively improving the test accuracy. In addition, by twisting the stud, the stud can be moved axially in the through hole, thereby adjusting the distance between the stage and the sealing cover, thereby achieving the purpose of adjusting the test height of the sample, which is very convenient to use and makes the test more widely applicable.

[0008] Preferably, the distance between the upper end of the internal thread and the upper edge of the through hole is greater than the height of the stage, so that when the stud moves to the highest point, there is still a certain amount of accommodation space between the stage and the sealing cover for accommodating the sample.

[0009] Preferably, one side of the sealing cover is pivotally connected to the upper surface of the base through a pivot axis, and the pivot axis is perpendicular to the central axis of the through hole, so that the sealing cover can be flipped to open or seal the through hole; a pressing block is provided on the other side of the base opposite to the pivot axis, so as to press against the surface edge of the sealing cover when the sealing cover is closed on the through hole. By flipping the sealing cover on the base, the sealing cover can be more convenient to open or close the opening of the through hole, and the pressing block positions the sealing cover, which can not only ensure the sealing performance between the sealing cover and the base, but also prevent the sealing cover from being accidentally opened, thereby improving the stability of the sample stage.

[0010] Specifically, the pressing block is pivotally connected to the base via a rotating shaft, and the central axis of the rotating shaft is parallel to the central axis of the through hole, so that the pressing block can be rotated quickly and conveniently to lock the sealing cover, which is very convenient to use.

[0011] Preferably, the sealing cover is provided with a first sealing ring on the side facing the through hole, and the first sealing ring is located at the periphery of the transparent observation window; when the sealing cover is closed on the through hole, the first sealing ring is sealed against the upper edge of the through hole. The first sealing ring can effectively prevent moisture from entering the through hole, thereby effectively isolating the sample in the through hole, ensuring that the sample is dry and the accuracy of the test.

[0012] Specifically, a mounting groove is provided on the outer periphery of the upper edge of the through hole, and the sealing cover is accommodated in the mounting groove when covering the through hole, and the first sealing ring is against the inner bottom surface of the mounting groove. The mounting groove can make the surface of the sealing cover flush with the surface of the base, making the structure of the entire sample stage more compact.

[0013] Specifically, a second sealing ring is circumferentially provided on the outer edge of the sealing cover, and when the sealing cover is closed on the through hole, the second sealing ring is sealed against the inner side of the mounting groove. The second sealing ring can form a second waterproof layer on the sealing cover, further improve the sealing performance, and ensure the accuracy of the test.

[0014] Specifically, a receiving groove is concavely provided on the inner bottom surface of the installation groove, the receiving groove is located on the inner side of the first sealing ring, the inner wall of the receiving groove is provided with an air hole connected to the receiving space, and a desiccant is provided in the receiving groove. By providing the receiving groove, the desiccant is placed in the receiving groove to dry the sample, ensuring that the sample remains dry in the receiving space, and further improving the accuracy of the test.

[0015] Preferably, a sample groove for accommodating a sample is concavely provided on the surface of the stage.

[0016] A Raman spectrum test method uses a Raman spectrum test sample stage, comprising the following steps: placing a stage with a sample in a containing space of the Raman spectrum test sample stage; screwing the stud to raise the stage to a desired height; sealingly covering the through hole with the sealing cover; placing the Raman spectrum test sample stage on a test table of a Raman spectrometer; adjusting the parameters of the Raman spectrometer and testing the sample in the Raman spectrum test sample stage; and obtaining Raman spectrum data of the sample in the current state. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the Raman spectrum test sample platform of the present invention.

[0018] Figure 2 It is a flow chart of the Raman spectrum testing method of the present invention. DETAILED DESCRIPTION

[0019] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0020] like Figure 1 As shown, the Raman spectrum test sample platform 100 of the present invention comprises a base 1, a stage 2, a sealing cover 3 and a stud 4. The base 1 is provided with a through hole 11 penetrating the upper and lower ends, and the cross section of the through hole 11 is circular; the stud 4 is arranged in the through hole 11, and the sealing cover 3 is arranged on the surface of the base 1, and can open or seal the through hole 11. An accommodating space 12 is formed between the bottom surface of the sealing cover 3, the upper end surface of the stud 4 and the inner wall of the through hole 11. The stage 2 is placed in the accommodating space 12 and supported on the upper end of the stud 4. The diameter of the stage 2 is slightly smaller than the diameter of the through hole 11, so that the stage 2 and the through hole 11 are in a clearance fit. An internal thread 11a is provided on the inner side of the through hole 11, and an external thread 41 matching the internal thread 11a is provided on the outer side of the stud 4. Turning the stud 4 can push the stage 2 to rise or fall in the accommodating space 12. The distance between the upper end of the internal thread 11a and the upper edge of the through hole 11 is greater than the height of the stage 2. In this way, when the stud 4 moves to the highest point, there is still a certain accommodation space 12 between the stage 2 and the sealing cover 3 for accommodating the sample, and preventing the stage 2 from crushing the sealing cover 3. The sealing cover 3 has a transparent observation window 31; the transparent observation window 31 is made of quartz glass. A sample groove 21 for accommodating the sample is recessed on the surface of the stage 2. The sample groove 21 has the same shape as the observation window, and the two are opposite to each other and have the same area. There is a cavity 13 between the bottom surface of the stud 4 and the inner wall of the through hole 11, and the bottom surface of the stud 4 is protrudingly provided with a knob or recessed with a slot 42 to drive the stud 4 to rotate.

[0021] Please see again Figure 1, one side of the sealing cover 3 is pivoted to the upper surface of the base 1 through a pivot shaft 32, and the pivot shaft 32 is perpendicular to the central axis of the through hole 11, so that the sealing cover 3 can be turned over to open or seal the through hole 11. Specifically, the upper surface of the sealing cover 3 and the upper surface of the base 1 can be pivoted together by a hinge. A pressing block 5 is provided on the other side of the base 1 opposite to the pivot shaft 32, so as to press against the surface edge of the sealing cover 3 when the sealing cover 3 is covered on the through hole 11. By setting the sealing cover 3 on the base 1 in a flipped manner, the sealing cover 3 can be more conveniently opened or closed. The pressing block 5 positions the sealing cover 3, which can not only ensure the sealing performance between the sealing cover 3 and the base 1, but also prevent the sealing cover 3 from being accidentally opened, thereby improving the working stability of the sample stage. Specifically, the pressing block 5 is pivoted to the base 1 through a rotating shaft 51, and the central axis of the rotating shaft 51 is parallel to the central axis of the through hole 11. In this way, the pressing block 5 can be rotated quickly and conveniently, so that the pressing block 5 locks the sealing cover 3, which is very convenient to use.

[0022] Please see again Figure 1 The sealing cover 3 is provided with a first sealing ring 3a on one side facing the through hole 11, and the first sealing ring 3a is located at the outer periphery of the transparent observation window 31; when the sealing cover 3 is covered on the through hole 11, the first sealing ring 3a is sealed against the upper edge of the through hole 11. The first sealing ring 3a can effectively prevent moisture from entering the through hole 11, thereby effectively isolating the sample in the through hole 11, ensuring that the sample is dry, and ensuring the accuracy of the test.

[0023] For example Figure 1As shown, a mounting groove 14 is provided on the outer periphery of the upper edge of the through hole 11, and the diameter of the mounting groove 14 is larger than the diameter of the through hole 11 and is concentric with the through hole 11. When the sealing cover 3 covers the through hole 11, it is accommodated in the mounting groove 14, and the first sealing ring 3a abuts against the inner bottom surface of the mounting groove 14. The mounting groove 14 can make the surface of the sealing cover 3 basically flush with the surface of the base 1, making the structure of the entire sample stage more compact. Specifically, the distance between the inner bottom surface of the mounting groove 14 and the bottom surface of the pressing block 5 is less than the sum of the thickness of the sealing cover 3 and the thickness of the first sealing ring 3a. In this embodiment, the distance between the inner bottom surface of the mounting groove 14 and the bottom surface of the pressing block 5 is equal to the sum of the thickness of the sealing cover 3 and the radius of the first sealing ring 3a. In this way, when the pressing block 5 presses the sealing cover 3, the first sealing ring 3a can be squeezed and deformed to a certain extent, so that it can be tightly pressed against the inner bottom surface of the mounting groove 14, ensuring the sealing performance without causing damage to the first sealing ring 3a. The outer edge of the sealing cover 3 is circumferentially provided with a second sealing ring 3b. When the sealing cover 3 is covered on the through hole 11, the second sealing ring 3b is sealed against the inner side surface of the mounting groove 14. The second sealing ring 3b can form a second waterproof layer on the sealing cover 3, further improve the sealing performance, and ensure the accuracy of the test. Specifically, the diameter of the mounting groove 14 is equal to the sum of the diameter of the sealing cover 3 and the diameter of the second sealing ring 3b. In this way, the second sealing ring 3b can be squeezed to a deformation degree of half of its own diameter, so that it can be tightly pressed against the inner side surface of the mounting groove 14, ensuring the sealing performance without causing damage to the second sealing ring 3b.

[0024] For example Figure 1 As shown, the inner bottom surface of the mounting groove 14 is concavely provided with a receiving groove 15, the receiving groove 15 is located on the inner side of the first sealing ring 3a, the inner wall of the receiving groove 15 is provided with an air hole 15a connected with the receiving space 12, and a desiccant 6 is arranged in the receiving groove 15. The receiving groove 15 can be an annular groove around the central axis of the through hole 11, or a plurality of arc grooves evenly arranged around the central axis of the through hole 11. By providing the receiving groove 15 and the air hole 15a, the desiccant 6 is placed in the receiving groove 15 to dry the sample, ensuring that the sample remains dry in the receiving space 12, and further improving the accuracy of the test.

[0025] Compared with the prior art, the present invention forms a through hole 11 on the base 1, sets a sealing cover 3 on the surface of the base 1 for opening or closing the through hole 11, and connects the thread 11a of the stud 4 to the through hole 11, thereby forming a sealed accommodation space 12 for accommodating the sample. After the sample is carried by the stage 2, the stage 2 is placed in the accommodation space 12, thereby isolating the sample from the outside world, preventing the sample from absorbing surrounding moisture during the test and affecting the test results, and effectively improving the test accuracy. In addition, by twisting the stud 4, the stud 4 can be moved axially in the through hole 11, so that the distance between the stage 2 and the sealing cover 3 can be adjusted, thereby achieving the purpose of adjusting the test height of the sample, which is very convenient to use and has a wider range of test applicability.

[0026] Combination Figure 2 As shown, the Raman spectrum testing method of the present invention uses a Raman spectrum testing sample table 100 to load a sample for testing, and includes the following steps:

[0027] Step S1, placing the stage 2 containing the sample in the accommodating space 12 of the Raman spectrum test sample stage 100;

[0028] Step S2, screwing the stud 4 to raise the stage 2 to a desired height;

[0029] Step S3, sealingly covering the sealing cover 3 in the through hole 11;

[0030] Step S4, placing the Raman spectrum test sample platform 100 on a test platform of a Raman spectrometer;

[0031] Step S5, adjusting the parameters of the Raman spectrometer, aligning the detection head of the Raman spectrometer with the transparent observation window 31, and testing the sample in the Raman spectrum test sample stage 100;

[0032] Step S6, obtaining Raman spectrum data of the sample in the current state.

[0033] The structure of the Raman spectrometer and the adjustment of the test parameters involved in the Raman spectrum test method of the present invention are well known to those skilled in the art and will not be described in detail herein.

[0034] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A Raman spectroscopy test sample platform, characterized in that: The utility model comprises a base, a stage, a sealing cover and a stud, wherein the base is provided with a through hole which passes through the upper and lower ends, the stud is arranged in the through hole, the sealing cover is arranged on the surface of the base and can open or seal the through hole; an accommodating space is formed between the bottom surface of the sealing cover, the upper end surface of the stud and the inner wall of the through hole; the stage is placed in the accommodating space and is arranged at the upper end of the stud; an internal thread is provided on the inner side of the through hole, and an external thread which cooperates with the internal thread is provided on the outer side of the stud so as to push the stage to rise or descend in the accommodating space; the sealing cover has a transparent observation window; a cavity is provided between the bottom surface of the stud and the inner wall of the through hole, and a knob is provided protrudingly or a slot is provided recessedly on the bottom surface of the stud so as to drive the stud to rotate.

2. The Raman spectroscopy test sample platform according to claim 1, characterized in that: The distance between the upper end of the internal thread and the upper edge of the through hole is greater than the height of the stage.

3. The Raman spectroscopy test sample platform according to claim 1, characterized in that: One side of the sealing cover is pivotally connected to the upper surface of the base through a pivot axis, and the pivot axis is perpendicular to the central axis of the through hole, so that the sealing cover can be flipped to open or seal the through hole; a pressing block is provided on the other side of the base opposite to the pivot axis to press against the surface edge of the sealing cover when the sealing cover is closed on the through hole.

4. The Raman spectroscopy test sample platform as claimed in claim 3, characterized in that: The pressing block is pivotally connected to the base via a rotating shaft, and a central axis of the rotating shaft is parallel to a central axis of the through hole.

5. The Raman spectroscopy test sample platform according to claim 1, characterized in that: A first sealing ring is provided on one side of the sealing cover facing the through hole, and the first sealing ring is located at the outer periphery of the transparent observation window; when the sealing cover is covered on the through hole, the first sealing ring is sealingly pressed against the upper edge of the through hole.

6. The Raman spectroscopy test sample platform as claimed in claim 5, characterized in that: An installation groove is arranged on the outer periphery of the upper edge of the through hole. When the sealing cover is covered on the through hole, the sealing cover is accommodated in the installation groove. The first sealing ring abuts against the inner bottom surface of the installation groove.

7. The Raman spectroscopy test sample platform according to claim 6, characterized in that: A second sealing ring is circumferentially provided on the outer edge of the sealing cover. When the sealing cover is covered on the through hole, the second sealing ring is sealingly pressed against the inner side surface of the mounting groove.

8. The Raman spectroscopy test sample platform according to claim 6, characterized in that: The inner bottom surface of the installation groove is concavely provided with a receiving groove, the receiving groove is located on the inner side of the first sealing ring, the inner wall of the receiving groove is provided with an air hole connected with the receiving space, and a desiccant is arranged in the receiving groove.

9. The Raman spectroscopy test sample platform according to claim 1, characterized in that: A sample groove for accommodating a sample is concavely arranged on the surface of the object carrier.

10. A Raman spectroscopy testing method, characterized in that: Using the Raman spectroscopy test sample platform according to any one of claims 1 to 9 comprises the following steps: Placing the stage containing the sample in the accommodation space of the Raman spectrum test sample stage; Tighten the stud to raise the stage to a desired height; Sealingly covering the sealing cover in the through hole; Placing the Raman spectrum test sample table on a test table of a Raman spectrometer; Adjusting the parameters of the Raman spectrometer and testing the samples in the Raman spectrum test sample station; Get the Raman spectrum data of the sample in the current state.

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