CN112432939A - Optical fiber Raman probe device with drilling function and using method - Google Patents
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- 239000000523 sample Substances 0.000 title claims abstract description 162
- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 50
- 238000005553 drilling Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000013307 optical fiber Substances 0.000 title abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 50
- 239000000835 fiber Substances 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 17
- 238000001228 spectrum Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 238000001237 Raman spectrum Methods 0.000 claims description 18
- 239000005308 flint glass Substances 0.000 claims description 4
- 239000007779 soft material Substances 0.000 abstract description 22
- 239000000843 powder Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 9
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- 230000001681 protective effect Effects 0.000 description 4
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- 229910000838 Al alloy Inorganic materials 0.000 description 3
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- 238000001125 extrusion Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
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- 230000005284 excitation Effects 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 1
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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Abstract
The invention relates to an optical fiber Raman probe device with a drilling function and a using method thereof, wherein the device comprises: drilling probe system: the probe comprises a probe rod with a depth mark, a drill bit and a probe handheld part which are respectively positioned at two ends of the probe rod, and a first measuring vernier which can move back and forth along the probe rod is also arranged on the probe rod; fiber Raman probe system: including the skin have the inside hollow restrictive coating pole of degree of depth mark to and set up respectively at the miniature camera lens and the handheld portion of raman probe at restrictive coating pole both ends, miniature camera lens still be connected with outside spectrum appearance, also be equipped with the second measurement vernier that can follow its removal on the restrictive coating pole. Compared with the prior art, the whole set of device is simple and convenient to operate, and can be widely applied to detection of deep powder samples in various soft material packages.
Description
Technical Field
The invention belongs to the technical field of dangerous chemical detection, and relates to an optical fiber Raman probe device with a drilling function and a using method thereof.
Background
In recent years, due to reasons such as the insecurity of an integrity system, there are various problems such as the hiding, the missing report, the hiding, the entrainment of dangerous chemicals in the transportation or storage process, and the like, so that a rapid on-site identification technology is urgently needed, but the rapid on-site identification of the unknown chemical powder in the deep inside of the package has great uncertainty and danger.
On the other hand, the Raman spectrum is used as a molecular structure identification and detection technology, and has the advantages of small sample quantity required for detection, small water interference, wide application range and the like. Meanwhile, the transparent/semitransparent plastic package can be used for rapid and nondestructive detection, but the powder sample identification at the deep part in the opaque soft material package is limited, and a common Raman probe can be used for detection and identification only by contacting the sample at a short distance, so that certain difficulty and danger are generated in the detection and identification process. The present invention has been made to solve the above problems.
Disclosure of Invention
The invention aims to provide an optical fiber Raman probe device with a drilling function and a using method thereof, so as to realize the on-site rapid detection function, ensure the detection safety and be suitable for detecting powder samples deep inside an opaque soft material package without taking out the samples.
The purpose of the invention can be realized by the following technical scheme:
in one aspect, the present invention provides a fiber raman probe device with a drilling function, including:
drilling probe system: the probe comprises a probe rod with a depth mark, a drill bit and a probe handheld part which are respectively positioned at two ends of the probe rod, and a first measuring vernier which can move back and forth along the probe rod is also arranged on the probe rod;
fiber Raman probe system: including the skin have the inside hollow restrictive coating pole of degree of depth mark to and set up respectively at the miniature camera lens and the handheld portion of raman probe at restrictive coating pole both ends, miniature camera lens still be connected with outside spectrum appearance, also be equipped with the second measurement vernier that can follow its removal on the restrictive coating pole.
Further, the drill bit is in a conical shape. Ensures easy drilling into soft material (plastic film, cardboard, etc.) packages, and is a detachable replacement type drill bit. Furthermore, the distance between the conical tip of the drill and the bottom surface of the cone is the same as the focal length of the micro lens.
Furthermore, the first measuring vernier comprises a first vernier cutting sleeve sleeved on the probe rod and a first vernier probe which is arranged on the first vernier cutting sleeve and used for recording depth marks; the second measuring vernier comprises a second vernier cutting sleeve sleeved on the probe rod and a second vernier probe which is installed on the second vernier cutting sleeve and used for recording depth marks. The vernier cutting sleeve is used for being matched with the depth mark to ensure that the distance after the soft material package is drilled is the same as the distance drilled by the drilling probe system, and the distance accuracy is ensured when the sample to be detected is detected. The vernier probe can be matched with the depth mark to appoint and record the distance after the drilling into the soft material package, so that the accuracy of the distance when the sample to be detected is ensured, and the vernier probe is similar to a vernier caliper.
Furthermore, the first vernier cutting sleeve and the second vernier cutting sleeve are both in a step-shaped annular structure.
Furthermore, the outer diameters of the probe rod and the sheath rod are the same, so that the optical fiber Raman probe can pass through a drill hole manufactured by using the drill probe system, no extra gap is generated, the influence of external light on detection is reduced, and the detection sensitivity is increased.
Furthermore, the outer diameters of the probe rod and the sheath rod are 2-3 mm.
Further, the miniature lens include the armor sheath to and install in proper order at inside cylindrical convex lens, the cylindrical concave lens and the optic fibre portion of armor sheath from outside to inside, wherein, armor sheath and restrictive coating fixed connection, cylindrical convex lens and the interval of cylindrical concave lens set up to the scattered light that will await measuring the sample and be produced after being shone through both combinations projects optic fibre portion, optic fibre portion still pass the handheld portion of restrictive coating pole and raman probe in proper order to connect outside spectrum appearance through flexible sheath optic fibre. The armor sheath and the sheath rod can be integrally formed by the same materials, and the armor sheath and the sheath rod can be made of hard materials, so that the internal structure is prevented from being damaged by the action force of extrusion, friction and the like. The probe rod can be made of aluminum alloy, and the material density is light, but the strength can penetrate through soft material (plastic film, paperboard and the like) for packaging.
Furthermore, the cylindrical convex lens and the cylindrical concave lens are made of flint glass, so that the price is relatively low, and the loss of incident light and exciting light when the incident light and the exciting light penetrate through the lenses can be reduced.
In another aspect, the present invention provides a method for using a fiber raman probe device with a drilling function, including the following steps:
(1) selecting a drilling position of a soft package of a sample to be tested, holding a probe handheld part, drilling the interior of the soft package by using a drill bit until the soft package contacts the sample to be tested, recording a corresponding depth mark on a probe rod by using a first measuring vernier, and then taking out the probe rod;
(2) then, moving the second measuring vernier to a position on the sheath rod corresponding to the recorded depth mark, holding the Raman probe handheld part, inserting the sheath rod and the miniature lens into the drill hole drilled by the drill bit until the target depth is reached, and performing Raman spectrum detection;
(3) recording and evaluating the detection result, and repeating the step (1) and the step (2) if the detection result is not ideal;
(4) and after the Raman spectrum detection is finished, taking out the sheath rod, and finishing.
In evaluating the detection result, specifically, whether the detection result is ideal or not is determined according to the quality of the raman spectrum, for example: when a complete and good Raman spectrum appears, the Raman spectrum can be considered as an ideal one; conversely, a spectrum with an absence of clutter may be deemed undesirable. Specifically, good and complete is: the highest intensity of the spectrogram does not exceed the upper detection limit, and the spectrogram can be observed with a more obvious spectral peak shape instead of a large amount of spectrogram noise, such as a straight-up and straight-down continuous line. And the disorder shows that: the spectra have a large amount of spectral noise, such as a line that resembles a straight line running from top to bottom.
Compared with the prior art, the invention has the following advantages:
(1) the drill bit is designed to be conical and can be disassembled for replacement, so that the drill bit is convenient to drill soft material (plastic film, paperboard and the like) packages and is easy to replace after being worn. Meanwhile, the drill bit can leave a conical space after the drill bit is taken out after the drilling operation is finished, and as the distance from the conical tip to the bottom surface of the cone is the same as the focal length of the miniature lens, the focal point of the miniature lens can be just focused at the powder sample, and the conical space can prevent the sample from polluting the miniature lens during detection.
(2) The distance after the soft material package is drilled can be recorded by combining the depth marks of the probe rod and the sheath rod and the use of the vernier cutting sleeve and the vernier probe, so that the accuracy of the distance when the sample to be detected is ensured.
(3) The outer diameter of the sheath rod is the same as that of the probe rod, so that the optical fiber Raman probe can pass through a drill hole manufactured by a drill hole probe system, no extra gap is generated, the influence of external light on detection is reduced, and the detection sensitivity is increased.
(4) The Raman probe can effectively enter the soft material package by utilizing the drilling probe system, the defect that the soft material package influences the detection of the Raman spectroscopy is overcome, and the application range of the Raman spectroscopy is expanded.
(5) By using the optical fiber Raman probe system, Raman spectroscopy detection can be carried out without taking out a sample, so that the detection risk is reduced.
(6) The whole device is simple and convenient to operate, and can be widely applied to detection of deep powder samples in various soft material packages.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the micro lens;
the notation in the figure is:
1-a drill bit, 2-a probe rod, 3-a first measuring vernier, 4-a probe handheld part, 5-a miniature lens, 6-a sheath rod, 7-a second measuring vernier, 8-a Raman probe handheld part, 9-a flexible sheath optical fiber, 10-a columnar diagram lens, 11-an armored sheath, 12-a columnar concave lens and 13-an optical fiber part.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
In the following description, functional components or structures that are not specifically described are all conventional components or structures used in the art to achieve the corresponding functions.
In order to provide a detection means suitable for taking out no sample and detecting dangerous chemical powder samples deep inside opaque soft material packages, the invention provides a fiber-optic Raman probe device with a drilling function, the structure of which is shown in figure 1 and comprises:
drilling probe system: the probe comprises a probe rod 2 with a depth mark, a drill bit 1 and a probe handheld part 4 which are respectively positioned at two ends of the probe rod 2, and a first measuring vernier 3 which can move back and forth along the probe rod 2;
fiber Raman probe system: including the skin have depth mark's inside hollow restrictive coating rod 6 to and set up respectively at the miniature camera lens 5 and the handheld portion 8 of raman probe at restrictive coating rod 6 both ends, miniature camera lens 5 still be connected with outside spectrum appearance, also be equipped with the second measurement vernier 7 that can follow its removal on the restrictive coating rod 6.
In a specific embodiment, referring again to fig. 1, the drill bit 1 is conical in shape. Ensures easy drilling into soft material (plastic film, cardboard, etc.) packages, and is a detachable replacement type drill bit 1. Further, the distance from the conical tip of the drill bit 1 to the bottom surface of the cone is the same as the focal length of the micro lens 5.
In one embodiment, referring again to fig. 1, the first measuring vernier 3 includes a first vernier sleeve fitted over the probe shaft 2, and a first vernier probe mounted on the first vernier sleeve and used for recording depth marks; the second measuring vernier 7 comprises a second vernier cutting sleeve sleeved on the probe rod 2 and a second vernier probe which is arranged on the second vernier cutting sleeve and used for recording depth marks. The vernier cutting sleeve is used for being matched with the depth mark to ensure that the distance after the soft material package is drilled is the same as the distance drilled by the drilling probe system, and the distance accuracy is ensured when the sample to be detected is detected. The vernier probe can record the distance after drilling into a soft material package by matching with the depth mark, so that the distance accuracy in the process of detecting a sample to be detected is ensured. In a more specific embodiment, the first cursor ferrule and the second cursor ferrule are both in a stepped annular structure.
In a specific embodiment, the probe rod 2 and the sheath rod 6 have the same outer diameter, so that the fiber-optic Raman probe can pass through a drill hole manufactured by using the drilling probe system, and additional gaps are not generated, thereby reducing the influence of external light on detection and increasing the detection sensitivity.
In a more specific embodiment, the outer diameters of the probe rod 2 and the sheath rod 6 are 2-3 mm.
In a specific embodiment, please refer to fig. 2 again, the micro lens 5 includes an armored sheath 11, and a cylindrical convex lens 10, a cylindrical concave lens 12 and an optical fiber portion 13 sequentially installed inside the armored sheath 11 from outside to inside, wherein the armored sheath 11 is fixedly connected with the sheath rod 6, the cylindrical convex lens 10 and the cylindrical concave lens 12 are arranged at an interval, and the combination of the two projects scattered light generated after the sample to be detected is irradiated to the optical fiber portion 13, and then the scattered light is transmitted to a spectrometer connected with the optical fiber of the flexible sheath by the optical fiber portion 13 (i.e., a transmission optical fiber) for detection and analysis, and the optical fiber portion 13 further sequentially passes through the sheath rod 6 and the raman probe handheld portion 8, and is connected to an external spectrometer by the flexible sheath optical fiber 9. The armored sheath 11 and the sheath rod 6 can be integrally formed by the same materials, and can be made of hard materials, so that the internal structure is prevented from being damaged by the action force of extrusion, friction and the like. The probe rod 2 can be made of aluminum alloy, and the material density is light, but the strength can penetrate through soft material (plastic film, paperboard and the like) packaging.
In a more specific embodiment, the cylindrical convex lens 10 and the cylindrical concave lens 12 are made of flint glass, which is relatively inexpensive and can reduce the loss of incident light and excitation light when the incident light and the excitation light penetrate the lenses.
On the other hand, the invention also provides a using method of the optical fiber Raman probe device with the drilling function, which comprises the following steps:
(1) firstly, selecting a drilling position of a soft package of a sample to be tested, holding a probe handheld part 4, drilling the interior of the soft package by using a drill bit 1 until the sample to be tested is contacted, recording a corresponding depth mark on a probe rod 2 by using a first measuring vernier 3, and then taking out the probe rod 2;
(2) then, moving the second measuring vernier 7 to a position on the protective sleeve rod 6 corresponding to the recorded depth mark, holding the Raman probe handheld part 8, inserting the protective sleeve rod 6 and the miniature lens 5 into the hole drilled by the drill bit 1 until the target depth is reached, and performing Raman spectrum detection;
(3) recording and evaluating the detection result, and repeating the step (1) and the step (2) if the detection result is not ideal;
(4) and after the Raman spectrum detection is finished, taking out the sheath rod 6, and finishing.
In evaluating the detection result, specifically, whether the detection result is ideal or not is determined according to the quality of the raman spectrum, for example: when a complete and good Raman spectrum appears, the Raman spectrum can be considered as an ideal one; conversely, a spectrum with an absence of clutter may be deemed undesirable. Specifically, good and complete is: the highest intensity of the spectrogram does not exceed the upper detection limit, and the spectrogram can be observed with a more obvious spectral peak shape instead of a large amount of spectrogram noise, such as a straight-up and straight-down continuous line. And the disorder shows that: the spectra have a large amount of spectral noise, such as a line that resembles a straight line running from top to bottom.
The above embodiments may be implemented individually, or in any combination of two or more.
The above embodiments will be described in more detail with reference to specific examples.
Example 1:
in order to provide a detection means suitable for detecting dangerous chemical powder samples deep inside opaque soft material packages without taking out the samples, the embodiment proposes a fiber-optic raman probe device with a drilling function, the structure of which is shown in fig. 1 and comprises:
drilling probe system: the probe comprises a probe rod 2 with a depth mark, a drill bit 1 and a probe handheld part 4 which are respectively positioned at two ends of the probe rod 2, and a first measuring vernier 3 which can move back and forth along the probe rod 2;
fiber Raman probe system: including the skin have the inside hollow restrictive coating pole 6 of degree of depth mark to and set up respectively at the miniature camera lens 5 and the handheld portion 8 of raman probe at restrictive coating pole 6 both ends, miniature camera lens 5 still is connected with outside spectrum appearance, also is equipped with the second measurement vernier 7 that can follow its removal on the restrictive coating pole 6.
Referring to fig. 1 again, the drill bit 1 is conical. Ensures easy drilling into soft material (plastic film, cardboard, etc.) packages, and is a detachable replacement type drill bit 1. Further, the distance from the conical tip of the drill bit 1 to the bottom surface of the cone is the same as the focal length of the micro lens 5.
Referring to fig. 1 again, the first measuring vernier 3 includes a first vernier sleeve sleeved on the probe shaft 2, and a first vernier probe installed on the first vernier sleeve and used for recording a depth mark; the second measuring vernier 7 comprises a second vernier sleeve sleeved on the probe shaft 2 and a second vernier probe installed on the second vernier sleeve and used for recording the depth mark. The vernier cutting sleeve is used for being matched with the depth mark to ensure that the distance after the soft material package is drilled is the same as the distance drilled by the drilling probe system, and the distance accuracy is ensured when the sample to be detected is detected. The vernier probe can record the distance after drilling into a soft material package by matching with the depth mark, so that the distance accuracy in the process of detecting a sample to be detected is ensured. The first vernier cutting sleeve and the second vernier cutting sleeve are both in a step-shaped annular structure. The probe rod 2 and the sheath rod 6 have the same outer diameter, so that the optical fiber Raman probe can pass through a drill hole manufactured by using the drill probe system, and no extra gap is generated, thereby reducing the influence of external light on detection and increasing the detection sensitivity. The outer diameters of the probe rod 2 and the sheath rod 6 are about 2-3 mm.
Referring to fig. 2 again, the micro lens 5 includes an armored sheath 11, and a cylindrical convex lens 10, a cylindrical concave lens 12 and an optical fiber portion 13 which are sequentially installed inside the armored sheath 11 from outside to inside, wherein the armored sheath 11 is fixedly connected with the sheath rod 6, the cylindrical convex lens 10 and the cylindrical concave lens 12 are arranged at an interval, and the scattered light generated after the sample to be detected is irradiated is projected to the optical fiber portion 13 through the combination of the two, and then is transmitted to the spectrometer connected with the flexible sheath optical fiber by the optical fiber portion 13 (i.e., the optical fiber for transmission), and is detected and analyzed, and the optical fiber portion 13 further sequentially passes through the sheath rod 6 and the raman probe handheld portion 8, and is connected to the external spectrometer by the flexible sheath optical fiber 9. The armored sheath 11 and the sheath rod 6 can be integrally formed by the same materials, and can be made of hard materials, so that the internal structure is prevented from being damaged by the action force of extrusion, friction and the like. The probe rod 2 can be made of aluminum alloy, and the material density is light, but the strength can penetrate through soft material (plastic film, paperboard and the like) packaging. The convex cylindrical lens 10 and the concave cylindrical lens 12 are made of flint glass, are relatively low in price, and can reduce the loss of incident light and exciting light when the incident light and the exciting light penetrate through the lenses.
On the other hand, the embodiment also provides a use method of the above optical fiber raman probe device with a drilling function, including the following steps:
(1) firstly, selecting a drilling position of a soft package of a sample to be tested, holding a probe handheld part 4, drilling the interior of the soft package by using a drill bit 1 until the sample to be tested is contacted, recording a corresponding depth mark on a probe rod 2 by using a first measuring vernier 3, and then taking out the probe rod 2;
(2) then, moving the second measuring vernier 7 to a position on the protective sleeve rod 6 corresponding to the recorded depth mark, holding the Raman probe handheld part 8, inserting the protective sleeve rod 6 and the miniature lens 5 into the hole drilled by the drill bit 1 until the target depth is reached, and performing Raman spectrum detection;
(3) recording and evaluating the detection result, and repeating the step (1) and the step (2) if the detection result is not ideal;
(4) and after the Raman spectrum detection is finished, taking out the sheath rod 6, and finishing.
In evaluating the detection result, specifically, whether the detection result is ideal or not is determined according to the quality of the raman spectrum, for example: when a complete and good Raman spectrum appears, the Raman spectrum can be considered as an ideal one; conversely, a spectrum with an absence of clutter may be deemed undesirable. Specifically, good and complete is: the highest intensity of the spectrogram does not exceed the upper detection limit, and the spectrogram can be observed with a more obvious spectral peak shape instead of a large amount of spectrogram noise, such as a straight-up and straight-down continuous line. And the disorder shows that: the spectra have a large amount of spectral noise, such as a line that resembles a straight line running from top to bottom.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The utility model provides a fiber Raman probe device with drilling function which characterized in that includes:
drilling probe system: the probe comprises a probe rod with a depth mark, a drill bit and a probe handheld part which are respectively positioned at two ends of the probe rod, and a first measuring vernier which can move back and forth along the probe rod is also arranged on the probe rod;
fiber Raman probe system: including the skin have the inside hollow restrictive coating pole of degree of depth mark to and set up respectively at the miniature camera lens and the handheld portion of raman probe at restrictive coating pole both ends, miniature camera lens still be connected with outside spectrum appearance, also be equipped with the second measurement vernier that can follow its removal on the restrictive coating pole.
2. The fiber-optic Raman probe device with drilling function of claim 1, wherein the drill is conical in shape.
3. The fiber-optic Raman probe device with drilling function of claim 2, wherein the distance from the conical tip of the drill to the conical bottom surface is the same as the focal length of the micro-lens.
4. The fiber-optic raman probe device with drilling function of claim 1, wherein said first measuring cursor comprises a first cursor ferrule fitted over said probe shaft, and a first cursor probe mounted on said first cursor ferrule for recording depth markings;
the second measuring vernier comprises a second vernier cutting sleeve sleeved on the probe rod and a second vernier probe which is installed on the second vernier cutting sleeve and used for recording depth marks.
5. The fiber Raman probe device with the drilling function of claim 4, wherein the first cursor ferrule and the second cursor ferrule are both in a stepped annular structure.
6. The fiber-optic Raman probe device with drilling function of claim 1, wherein the probe rod and the sheath rod have the same outer diameter.
7. The fiber Raman probe apparatus with drilling function of claim 6, wherein the outer diameter of the probe rod and the sheath rod is 2-3 mm.
8. The fiber Raman probe device with the drilling function according to claim 1, wherein the micro lens comprises an armored sheath, and a cylindrical convex lens, a cylindrical concave lens and a fiber part which are sequentially installed inside the armored sheath from outside to inside, wherein the armored sheath is fixedly connected with a sheath rod, the cylindrical convex lens and the cylindrical concave lens are arranged at intervals and project scattered light generated after a sample to be measured is irradiated to the fiber part through the combination of the cylindrical convex lens and the cylindrical concave lens, and the fiber part sequentially penetrates through the sheath rod and the Raman probe handheld part and is connected with an external spectrometer through a flexible sheath fiber.
9. The fiber Raman probe device with the drilling function of claim 8, wherein the cylindrical convex lens and the cylindrical concave lens are made of flint glass.
10. The method of using the fiber Raman probe apparatus with drilling function according to any one of claims 1 to 9, comprising the steps of:
(1) selecting a drilling position of a soft package of a sample to be tested, holding a probe handheld part, drilling the interior of the soft package by using a drill bit until the soft package contacts the sample to be tested, recording a corresponding depth mark on a probe rod by using a first measuring vernier, and then taking out the probe rod;
(2) then, moving the second measuring vernier to a position on the sheath rod corresponding to the recorded depth mark, holding the Raman probe handheld part, inserting the sheath rod and the miniature lens into the drill hole drilled by the drill bit until the target depth is reached, and performing Raman spectrum detection;
(3) recording and evaluating the detection result, and repeating the step (1) and the step (2) if the detection result is not ideal;
(4) and after the Raman spectrum detection is finished, taking out the sheath rod, and finishing.
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