CN108885168B - Detection system and signal enhancement device - Google Patents
Detection system and signal enhancement device Download PDFInfo
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- CN108885168B CN108885168B CN201880001167.6A CN201880001167A CN108885168B CN 108885168 B CN108885168 B CN 108885168B CN 201880001167 A CN201880001167 A CN 201880001167A CN 108885168 B CN108885168 B CN 108885168B
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- 238000001514 detection method Methods 0.000 title claims abstract description 124
- 239000000523 sample Substances 0.000 claims abstract description 51
- 238000001228 spectrum Methods 0.000 claims abstract description 49
- 239000000126 substance Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 34
- 238000010183 spectrum analysis Methods 0.000 claims description 6
- 238000004611 spectroscopical analysis Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000012491 analyte Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 18
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- -1 acryl Chemical group 0.000 description 1
- 238000001675 atomic spectrum Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The present application relates to the field of optical detection technologies, and in particular, to a detection system and a signal enhancement device. The detection system comprises: the detection device comprises an objective table and a detection probe, and the signal enhancement device is of a hollow cavity structure provided with an opening; the object stage is arranged in the cavity of the signal enhancement device, and the detection probe is arranged at the opening of the cavity structure; wherein the objective table is arranged at the detection focus position of the detection probe; the detection device is used for emitting detection laser signals, the detection laser signals penetrate through the detection probe and are projected to the detected object of the object stage, and the detection device is used for acquiring a substance spectrum emitted by the detected object. The detection system is used for solving the problem that ambient light causes interference to the spectrum detection of the substance.
Description
Technical Field
The present application relates to the field of optical detection technologies, and in particular, to a detection system and a signal enhancement device.
Background
The spectrometer is an important instrument for optical detection, is a universal device for completing the measurement of components, structures and the like of substances through the measurement and analysis of the spectrum, and has the advantages of high measurement speed, high precision, nondestructive measurement and the like.
In the conventional spectrometer, a laser signal is emitted to the surface of an object to be detected, the object to be detected generates a substance spectrum due to the irradiation of laser, and the spectrometer determines the type of a substance according to the substance spectrum.
The inventor finds that in the process of researching the prior art, the existing spectrum measurement is usually to irradiate the detected substance by emitting laser, and one end of the optical fiber directly receives or utilizes a confocal probe to receive spectrum signals, so that the light signals in the environment can directly enter a spectrometer to influence the detection of the acquired substance spectrum.
Disclosure of Invention
The technical problem to be solved by some embodiments of the present application is to provide a detection system and a signal enhancement device, which are used for solving the problem that ambient light interferes with the spectrum detection of a substance in optical detection.
One embodiment of the present application provides a detection system comprising: the detection device comprises an objective table and a detection probe, and the signal enhancement device comprises a hollow cavity structure with an opaque opening;
the object stage is arranged in the cavity of the cavity structure, and the detection probe is arranged at the opening of the cavity structure; the object stage is arranged at the detection focus position of the detection probe;
the detection device is used for emitting detection laser signals, the detection laser signals penetrate through the detection probe to be projected to the detected object of the object stage, and the detection device is used for acquiring a material spectrum emitted by the detected object.
An embodiment of the present application also provides a signal enhancement apparatus, including: a hollow cavity structure provided with an opening;
the cavity of the signal enhancement device is internally provided with an objective table, and the opening of the cavity structure is provided with a detection probe.
Compared with the prior art, the object stage is arranged in the cavity of the signal enhancement device, the detection probe is arranged at the opening of the cavity structure, so that the optical signal in the environment can not interfere with the material spectrum generated by the detected object, and therefore, the collected material spectrum does not have the optical signal in the environment, and the more accurate material spectrum can be obtained; in addition, the objective table is arranged at the focus position of the detection probe, and the object to be detected is placed on the objective table when the spectrum of the substance is detected, so that focusing is not needed to be carried out every time of detection, the testing step is simplified, and the testing efficiency is improved.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
FIG. 1 is a schematic diagram of a detection system according to a first embodiment of the present application;
FIG. 2 is a schematic diagram of another detecting system according to the first embodiment of the present application;
FIG. 3 is a schematic diagram of a detection system according to a second embodiment of the present application;
fig. 4 is a schematic structural view of a signal enhancing device according to a third embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, some embodiments of the present application will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. However, those of ordinary skill in the art will understand that in various embodiments of the present application, numerous technical details have been set forth in order to provide a better understanding of the present application. However, the claimed technical solution of the present application can be realized without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the present application relates to a detection system, the structure of which is shown in fig. 1, comprising: a detection means 10 and a signal enhancement means 20.
Specifically, the detection device 10 includes a stage 11 and a detection probe 12, and the signal enhancement device 20 includes a hollow cavity structure with an opaque opening; the object stage 11 is arranged in the cavity of the cavity structure, and the detection probe 12 is arranged at the opening of the cavity structure; wherein the stage 11 is provided at a detection focus position of the detection probe 12; the detection device 10 is configured to emit a detection laser signal, the detection laser signal is projected to an object to be detected on the stage 11 through the detection probe 12, and to acquire a substance spectrum emitted from the object to be detected. The focal position is detected, that is, the focal position of the laser light emitted from the detection probe.
It should be noted that, the detection device 10 further includes a laser generator, an optical path structure, a spectrum collector, and the like, and in a specific structural design, the spectrum collector may be integrated at a position of the detection probe, or may be separately disposed from the detection probe. Specifically, the laser generator is used for sending out laser signals, the laser signals are projected to the detected object of the object stage through the detection probe, the spectrum collector obtains optical signals sent out by the detected object, and the optical signals generate a substance spectrum through the optical path structure. In a specific implementation, the detection device can be a raman spectrometer, a laser-induced breakdown spectrometer or the like, and the specific type of the detection device is not limited.
Specifically, the stage 11 is disposed inside a hollow cavity structure, so that light in the environment can be ensured not to affect a material spectrum generated by the object to be detected, and the cavity structure is made of a non-transparent material. When the detecting device 10 obtains the material spectrum emitted by the detected object, only the material spectrum on the side where the detecting probe is located can be obtained, and in order to improve the collection efficiency of the optical signal in the material spectrum obtained by the detecting device, the reflective material is attached to the inner surface of the cavity structure, so that the material spectrum on the other side is collected by the detecting device after being reflected by the cavity structure.
If the cavity structure is made of a material with excellent light transmittance, such as glass, acryl, etc., a reflective material may be disposed on the outer surface or the inner surface of the cavity structure, so that the effect of reflecting light can be achieved. In this embodiment, the reflective material is not limited to be disposed on the inner surface or the outer surface, and may be actually disposed according to the material characteristics of the cavity structure.
It should be noted that the reflective material is a high reflective film with a preset wavelength range, for example, the detection device detects the spectrum of the substance by using the laser signal, and the reflective material may be a high reflective film with respect to the wavelength range of the laser signal. In practice, the reflective material is not limited to a highly reflective film, for example, a metal material with excellent reflectivity is disposed on the inner wall of the cavity structure, and the reflective film may not be disposed, so that the manner for reflecting light inside the cavity structure is not limited to a highly reflective film, which is not limited herein.
In order to further improve the light signal collection rate of the detection device 10, the inner wall of the cavity structure is designed to be a proper curved surface through optical design software, so that the light can generate a focusing effect when being reflected inside the cavity structure, for example, the cavity structure can be designed to be a cylindrical, spherical, elliptic cylindrical, elliptic spherical (also called as an ellipsoid) structure, and the object stage is arranged at the light reflection focusing point of the cavity structure.
It is worth mentioning that the objective table is located the detection focus position of test probe to also be located the light reflection focus point of cavity structure, can guarantee to be located the best detection position at the material detection in-process by the measured object, need not focus when changing the material at every turn, simplified user's operation, promote user experience.
It should be noted that, the cavity structure may be a regular curved surface structure, similar to a sphere, or an irregular curved surface structure, and the position of the light-reflecting focusing point of the irregular curved surface structure may still be determined, where the light-reflecting focusing point is the point in the cavity structure where the light is most concentrated after being reflected by the inner wall of the cavity structure.
In one embodiment, if the signal enhancement device 20 is a cylindrical or spherical cavity structure, the light reflection focal point of the cavity structure is the center point of the cylindrical or spherical cavity structure; the object stage is positioned at the center point of the cavity structure, and the detection focus position is also positioned at the center point of the cavity structure.
In the case of a spherical cavity structure, the light reflection converging point is located at the position of the sphere center, the detection probe is located at a certain position on the surface of the sphere, and the light emitted from the detection probe is projected to the stage located at the sphere center, that is, irradiated to the object to be detected, so that even if the light irradiates to the position of the inner surface of the sphere, the light can be reflected by the surface of the cavity structure and irradiated to the object to be detected, thereby improving the utilization rate of detection laser.
In another embodiment, the light reflection focusing point is not unique to the curved surface with a special structure, for example, the signal enhancement device 20 is an elliptical columnar cavity structure, that is, the cross section is an elliptical column, and the light reflection focusing point is a first focus or a second focus of the cross section in the elliptical columnar cavity structure; alternatively, if the signal enhancement device has an ellipsoidal cavity structure, as shown in fig. 2, the light reflection focal point is an ellipsoidal first focal point or a second focal point.
For the cavity structure with two light reflection focusing points, the setting mode of the objective table is more than one, if the cavity structure is provided with an opening, the objective table is arranged at the first focus or the second focus of the cavity structure, or; if the cavity structure is provided with two openings, the first objective table is arranged at a first focus of the cavity structure, the first detection probe is arranged at the first opening, and the detection focus position of the first detection probe coincides with the first focus; the second objective table is arranged at a second focus of the cavity structure, the second detection probe is arranged at the second opening, and the detection focus position of the second detection probe coincides with the second focus; wherein, the detected object is placed on the first object stage or the second object stage in the actual detection process.
It should be noted that, for an elliptical sphere with two focuses, if there are two openings, the detection probe and the spectrum collector can be separately disposed, the detection probe and the spectrum collector are respectively disposed at the two openings of the elliptical sphere, and it is noted that if the detection probe and the spectrum collector are separately disposed, the detection probe and the spectrum collector are required to be disposed at a straight line where the first focus and the second focus are located, the detection probe is disposed at an opening of a cavity structure close to the first focus, the spectrum collector is disposed at an opening of a cavity structure close to the second focus, or the detection probe is disposed at an opening of a cavity structure close to the second focus, and the spectrum collector is disposed at an opening of a cavity structure close to the first focus. According to the principle of optical reflection, a laser signal passing through one focus passes through the other focus due to reflection, so that when light is projected to an object to be detected, a part of light is reflected to a probe collecting the spectrum of the object to be detected after passing through the object to be detected, and the other part of scattered light is irradiated to the object to be detected again after being reflected, and the cavity structure has the optical signal loss only of each reflection loss and the light leakage loss of the cavity, so that the optical signal collection rate is higher.
Compared with the prior art, the object stage is arranged in the cavity of the signal enhancement device, the detection probe is arranged at the opening of the cavity structure, so that the optical signal in the environment can not interfere with the material spectrum generated by the detected object, and therefore, the collected material spectrum does not have the optical signal in the environment, and the more accurate material spectrum can be obtained; in addition, the objective table is arranged at the detection focus position, and the object to be detected is placed on the objective table when the spectrum of the substance is detected, so that focusing is not needed to be carried out every time of detection, the testing step is simplified, and the testing efficiency is improved.
A second embodiment of the present application relates to a detection system, which is substantially the same as the first embodiment, and is mainly different in that a spectroscopic analysis device in the detection system is described in the second embodiment of the present application. As shown in fig. 3.
Specifically, the detection system further comprises a spectrum analysis device 30, which is connected to the detection device 10. The detection device 10 is further configured to forward the acquired spectrum of the substance to a spectrum analysis device; the spectrum analyzer 30 is configured to detect a substance from the acquired substance spectrum and determine a substance represented by the substance spectrum.
Specifically, the detection system is configured to detect a solid, a liquid, or a gas.
It should be noted that the spectrum analyzer may be an atomic spectrum analyzer or a molecular spectrum analyzer, and is mainly used for analyzing the composition of the detected object according to the material spectrum, so as to determine the most possible material type of the detected object. There is no limitation in the type of the spectroscopic analysis device and the specific determination process.
In this embodiment, the spectrum analysis device acquires the material spectrum, and the collection rate of the optical signal is higher due to the improvement of the signal enhancement device, so that the analysis result made by the spectrum analysis device according to the material spectrum is more reliable.
A third embodiment of the present application relates to a signal enhancement device 20, the structure of which is shown in fig. 4, comprising: the signal enhancement device comprises a hollow cavity structure provided with an opening, wherein an objective table is arranged in the cavity structure of the signal enhancement device, and a detection probe is arranged at the opening of the cavity structure.
Specifically, the inner surface of the cavity structure is attached with a reflective material.
Since the signal enhancing device in this embodiment is the same as the signal enhancing device in the first embodiment, the related technical features and technical details mentioned in the first embodiment are still valid in this embodiment, and the technical effects that can be achieved in the first embodiment can be also achieved in this embodiment, so that repetition is reduced, and details are not repeated here. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first embodiment.
It should be noted that the objective table is disposed at the light reflection focusing point of the cavity structure, the detection probe is disposed at the opening of the cavity structure, and for ensuring normal detection, the caliber of the opening needs to be satisfied to accommodate the objective table to enter the cavity structure, that is, after the object to be detected is placed on the objective table, the objective table is pushed into the signal enhancement device through the opening of the cavity structure, so that the normal detection is ensured. Of course, other ways can be adopted to place the object to be detected on the object stage, for example, a flexibly turnover object placing opening is formed in the surface of the cavity structure, for example, a clamping buckle is arranged on the surface of the cavity structure, a proper area is divided into the object placing opening, when the object to be detected needs to be placed, the object placing opening is opened, the object to be detected is directly placed on the object stage, the object placing opening is clamped, and the cavity structure is guaranteed to be airtight and light-proof.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the application and that various changes in form and details may be made therein without departing from the spirit and scope of the application.
Claims (7)
1. A detection system, comprising: the detection device comprises an objective table and a detection probe, and the signal enhancement device comprises a hollow cavity structure with an opaque opening;
the object stage is arranged in the cavity of the cavity structure, and the detection probe is arranged at the opening of the cavity structure; wherein the objective table is arranged at the detection focus position of the detection probe;
the detection device is used for emitting detection laser signals, the detection laser signals penetrate through the detection probe and are projected to a detected object of the object stage, and the detection device is used for acquiring a substance spectrum emitted by the detected object;
the objective table is arranged at a light reflection focusing point of the cavity structure;
the signal enhancement device is of an elliptic spherical cavity structure, the light reflection focusing point is of a first focus or a second focus of the elliptic spherical structure, or the signal enhancement device is of an elliptic columnar cavity structure, and the light reflection focusing point is of a first focus or a second focus of an elliptic shape in the elliptic columnar cavity structure;
the cavity structure is provided with two openings, the first objective table is arranged at the first focus of the cavity structure, the first detection probe is arranged at the first opening, and the detection focus position of the first detection probe is coincident with the first focus; the second objective table is arranged at the second focus of the cavity structure, the second detection probe is arranged at the second opening, and the detection focus position of the second detection probe coincides with the second focus.
2. The detection system of claim 1, wherein the interior surface of the cavity of the signal enhancement device is affixed with a reflective material.
3. The detection system of claim 2, wherein the light reflective material is a highly reflective film of a predetermined wavelength range.
4. A detection system according to any one of claims 1 to 3, wherein the detection system further comprises a spectroscopic analysis device;
the detection device is also used for forwarding the acquired material spectrum to the spectrum analysis device;
the spectrum analysis device is used for detecting according to the acquired material spectrum and determining the material represented by the material spectrum.
5. A detection system according to any one of claims 1 to 3, wherein the analyte is a solid, liquid or gas.
6. A signal enhancement apparatus, comprising: a hollow cavity structure provided with an opening;
an objective table is arranged in the cavity of the cavity structure, and a detection probe is arranged at an opening of the cavity structure;
the objective table is arranged at a light reflection focusing point of the cavity structure;
the signal enhancement device is of an elliptic spherical cavity structure, the light reflection focusing point is of a first focus or a second focus of the elliptic spherical structure, or the signal enhancement device is of an elliptic columnar cavity structure, and the light reflection focusing point is of a first focus or a second focus of an elliptic shape in the elliptic columnar cavity structure;
the cavity structure is provided with two openings, the first objective table is arranged at the first focus of the cavity structure, the first detection probe is arranged at the first opening, and the detection focus position of the first detection probe is coincident with the first focus; the second objective table is arranged at the second focus of the cavity structure, the second detection probe is arranged at the second opening, and the detection focus position of the second detection probe coincides with the second focus.
7. The signal enhancement device of claim 6, wherein a reflective material is attached to an inner surface of the cavity structure.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/090765 WO2019237242A1 (en) | 2018-06-12 | 2018-06-12 | Detection system and signal enhancement device |
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| CN108885168A CN108885168A (en) | 2018-11-23 |
| CN108885168B true CN108885168B (en) | 2023-12-01 |
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| WO (1) | WO2019237242A1 (en) |
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| CN111780489A (en) * | 2020-07-22 | 2020-10-16 | 山东理工职业学院 | Intelligent constant-temperature fresh-keeping control device and control method |
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| Publication number | Publication date |
|---|---|
| CN108885168A (en) | 2018-11-23 |
| WO2019237242A1 (en) | 2019-12-19 |
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