CN118566196A - Dangerous chemical detection method, dangerous chemical detection device, dangerous chemical detection terminal and dangerous chemical storage medium - Google Patents
Dangerous chemical detection method, dangerous chemical detection device, dangerous chemical detection terminal and dangerous chemical storage medium Download PDFInfo
- Publication number
- CN118566196A CN118566196A CN202411046232.0A CN202411046232A CN118566196A CN 118566196 A CN118566196 A CN 118566196A CN 202411046232 A CN202411046232 A CN 202411046232A CN 118566196 A CN118566196 A CN 118566196A
- Authority
- CN
- China
- Prior art keywords
- detected
- spectrum
- raman scattered
- raman
- determining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- G01N21/62—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
- G01N21/658—Raman scattering enhancement Raman, e.g. surface plasmons
Landscapes
- Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention provides a method, a device, a terminal and a storage medium for detecting dangerous chemicals. The method comprises the following steps: acquiring the excitation frequency of the target chemical; transmitting laser to the object to be detected by adopting the excitation frequency, and collecting Raman scattered light to obtain a Raman scattered spectrum; and if the vibration peak exists in the Raman scattering spectrum, determining that the target chemical exists in the object to be detected. The invention can enhance the Raman scattered light, so that the corresponding Raman scattered light spectrum has a peak value with obvious vibration, and whether the object to be detected has the target chemical or not can be easily detected.
Description
Technical Field
The invention relates to the technical field of detection of chemicals, in particular to a method, a device, a terminal and a storage medium for detecting dangerous chemicals.
Background
There are a large number of hazardous chemical import and export services each year on each access port. Because dangerous chemicals have dangerous characteristics such as inflammability, explosiveness, toxicity and the like, once supervision holes appear, serious potential safety hazards are easily caused. The method has the advantages that the risk of the import and export process of dangerous chemicals in the port is more, the supervision form is serious, and other challenges are presented, so that the method is very important in carrying out reasonable risk assessment, realizing important supervision and promoting the safety development of the logistics of dangerous chemicals in the port.
In the prior art, during general import and export security inspection, whether dangerous chemicals exist is detected in a scanning or image processing mode, but dangerous chemicals with smaller content are not easy to accurately detect. The detection can also be carried out by adopting a mode of emitting laser to dangerous chemicals in a Raman spectrum normal direction, but the Raman scattered light of dangerous chemicals with smaller content is very weak, and almost no Raman scattered light is obtained, so that dangerous chemicals cannot be detected.
Disclosure of Invention
The embodiment of the invention provides a method, a device, a terminal and a storage medium for detecting dangerous chemicals, which are used for solving the problem that dangerous chemicals with smaller content cannot be accurately detected in the prior art.
In a first aspect, an embodiment of the present invention provides a method for detecting a hazardous chemical, including:
Acquiring the excitation frequency of the target chemical;
Transmitting laser to the object to be detected by adopting the excitation frequency, and collecting Raman scattered light to obtain a Raman scattered spectrum;
And if the vibration peak exists in the Raman scattering spectrum, determining that the target chemical exists in the object to be detected.
In one possible implementation manner, before the step of using the excitation frequency to emit laser light to the object to be detected and collecting raman scattered light, the method further includes:
detecting whether the package of the object to be detected is transparent package or not;
Transmitting laser to the object to be detected by adopting the excitation frequency, collecting Raman scattered light to obtain a Raman scattered spectrum, and comprising the following steps:
When the package of the object to be detected is transparent package, the excitation frequency is adopted to emit laser to the object to be detected, and the Raman scattered light is collected to obtain a Raman scattered spectrum.
In one possible implementation, the method further includes:
when the package of the object to be detected is an opaque package, placing the object to be detected in a tray to be detected;
Transmitting laser to the object to be detected by adopting the excitation frequency, collecting Raman scattered light to obtain a Raman scattered spectrum, and comprising the following steps:
And transmitting laser to the object to be detected in the disc to be detected by adopting the excitation frequency, and collecting Raman scattered light to obtain a Raman scattered spectrum.
In one possible implementation manner, the material of the disc to be detected is a magnetic nanomaterial.
In one possible implementation, the disc to be detected includes: the detection support plate and the detection plates are arranged on the detection support plate, and the detection support plate and the detection plates are made of magnetic nano materials;
the detection plate has a shape similar to any plane of the molecular structure of the object to be detected.
In one possible implementation, if there is a vibration peak in the raman scattering spectrum, determining that the target chemical is present in the object to be detected includes:
If the Raman scattering spectrum has a vibration peak value, calculating a difference value between the frequency of the Raman scattering light and the excitation frequency;
Detecting whether the difference is equal to a preset frequency difference;
and if the difference value is equal to a preset frequency difference, determining that the target chemical exists in the object to be detected.
In one possible implementation, the method further includes:
and if the vibration peak value does not exist in the Raman scattering spectrum or the vibration peak value exists in the Raman scattering spectrum and the difference value is not equal to a preset frequency difference, determining that the target chemical does not exist in the object to be detected.
In one possible implementation manner, the method further includes, while using the excitation frequency to emit laser light to the object to be detected, the steps of:
When the object to be detected is liquid, keeping the focus of an emission light path of the infrared detector and the surface of the object to be detected in the same plane, and collecting infrared spectrum;
If there is a vibration peak in the raman scattering spectrum, determining that the target chemical is present in the object to be detected comprises:
And if a vibration peak exists in the Raman scattering spectrum and an absorption peak appears at a preset position of the infrared spectrum, determining that the target chemical exists in the object to be detected.
In one possible implementation, after determining that the target chemical is present in the object to be detected, the method further includes:
performing flash point detection on the object to be detected, and determining the flash point of the object to be detected;
Detecting whether the flash point is smaller than a preset flash point threshold;
If the flash point is smaller than a preset flash point threshold value, determining that the object to be detected is a flammable and explosive object, and giving an alarm.
In a second aspect, an embodiment of the present invention provides a detection apparatus for hazardous chemicals, including:
An acquisition module for acquiring an excitation frequency of a target chemical;
The processing module is used for emitting laser to the object to be detected by adopting the excitation frequency, and collecting Raman scattered light to obtain a Raman scattered spectrum;
And the determining module is used for determining that the target chemical exists in the object to be detected if the vibration peak exists in the Raman scattering spectrum.
The embodiment of the invention provides a detection method, a detection device, a detection terminal and a storage medium for dangerous chemicals, wherein the detection method, the detection device, the detection terminal and the storage medium are used for acquiring the excitation frequency of target chemicals, further adopting the excitation frequency to emit laser to an object to be detected, and collecting Raman scattered light to obtain a Raman scattered spectrum; if the vibration peak exists in the Raman scattering spectrum, determining that the object chemical exists in the object to be detected, and irradiating the object to be detected by adopting the excitation frequency of the object chemical in the embodiment of the invention, so that molecules of the object chemical in the object to be detected generate resonance phenomenon, thereby enhancing Raman scattering light, enabling the corresponding Raman scattering spectrum to have obvious vibration peak, easily detecting whether the object chemical exists in the object to be detected, and solving the problem that the Raman scattering light intensity is weak and the chemical cannot be detected when the Raman scattering method is adopted to detect the chemical in the prior art.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an application scenario diagram of a detection method of dangerous chemicals provided by an embodiment of the present invention;
FIG. 2 is a flow chart illustrating an implementation of a method for detecting hazardous chemicals according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of a sensing plate provided by an embodiment of the present invention;
FIG. 4 is a schematic structural view of a dangerous chemical detecting device according to an embodiment of the present invention;
Fig. 5 is a schematic diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.
In the prior art, during general import and export security inspection, whether dangerous chemicals exist is detected in a scanning or image processing mode, but dangerous chemicals with smaller content are not easy to accurately detect.
In recent years, the types and the amounts of import and export dangerous chemicals are continuously rising, and the dangerous chemicals have a certain potential danger to the life and property safety of the national people in the transportation and use processes, so that the customs is particularly important as the first gateway of import and export of the dangerous chemicals. There are various methods for detecting organic matters in dangerous chemicals, including infrared spectroscopy, raman spectroscopy, high performance liquid chromatography, nuclear magnetic resonance hydrogen spectroscopy, etc. Although the detection method has higher sensitivity, the method also has the defects of long pretreatment time consumption, high detection cost, easy interference in the experimental process and the like. Wherein the raman spectrum analyzes the scattering spectrum with different frequency from the incident light to obtain information on the vibration and rotation of the molecule, thereby clarifying the molecular structure. The raman scattering spectrometry has the advantages of no need of pretreatment of samples, simple operation process, small error and the like, however, the signal obtained by the raman spectrometry is weak, and the raman spectrometry is not widely applied to the rapid and trace detection of import and export dangerous chemicals in large quantities.
Therefore, the embodiment of the invention provides a detection method of dangerous chemicals, which improves the Raman spectroscopy so as to accurately detect the dangerous chemicals by applying the Raman spectroscopy in customs detection of import and export.
Fig. 1 is a flowchart of an implementation of a method for detecting a dangerous chemical according to an embodiment of the present invention, which is described in detail below:
Step 101, the excitation frequency of the target chemical is acquired.
The target chemical may be any chemical which is difficult to detect by raman spectroscopy, such as trinitrotoluene (TNT), which is a typical representative of flammable and explosive dangerous chemicals, and TNT is widely used in the fields of petroleum construction, metallurgical coal mines and the like, however, excessive use of TNT can seriously pollute water sources and soil, cause irreversible damage to animals and plants, accumulate in human bodies along with food chains, cause diseases of upper respiratory tracts, gastrointestinal tracts and the like in humans in light weight, and cause carcinogenesis in heavy weight. However, since no chromophore exists in the TNT molecule in the visible range, it is difficult to detect it by conventional Raman spectroscopy.
And the technology for detecting customs drugs efficiently, rapidly and accurately is an important goalkeeper for preventing drugs from being input externally and flowing out internally. However, due to the low concentration of the drugs, the conventional raman spectroscopy technology cannot detect the drugs.
In this embodiment, when the object to be detected is irradiated with laser light, the laser frequency of the target chemical may be collected in advance, so that when the object to be detected is irradiated with laser light, molecules of the target chemical are excited to generate resonance phenomenon, and a peak value of the generated raman scattering spectrum is more obvious.
It will be appreciated that when the chemicals are different, their corresponding excitation frequencies are different, so that when the object to be detected is irradiated with a laser light having a different excitation frequency from that of the target chemical, the resonance phenomenon of the molecules of the target chemical is not obvious.
And 102, transmitting laser to the object to be detected by adopting the excitation frequency, and collecting Raman scattered light to obtain a Raman scattered spectrum.
The object to be detected is irradiated with laser light to generate two forms of scattered light, one is raman scattered light, i.e. the frequency of the incident light is different from the frequency of the reflected light, and the other is scattered light with the same frequency as the frequency of the reflected light, which may be referred to as rayleigh scattering, and in this embodiment, raman scattered light is mainly collected. In the prior art, the occurrence probability of the raman scattered light is very small, but the to-be-detected object is irradiated by the excitation frequency of the to-be-detected object in the embodiment, molecules of the to-be-detected object can be excited to generate resonance, and the raman scattered light is enhanced, so that the to-be-detected object with lower molecular concentration can be detected.
Optionally, the spectral line width of the light source of the laser emitted to the object to be detected is smaller than the preset width, the spectral line width is narrower, the monochromaticity is good, the excitation frequency is more stable, and the resonance phenomenon of molecules of the object to be detected is more obvious.
In one embodiment, since raman detection can achieve contactless detection of unknown articles, detection can be performed through transparent packaging on the surface of the article to be detected during the detection process. Thus, referring to fig. 2, before the excitation frequency is used to emit laser light to the object to be detected and collect raman scattered light, the method may further include:
Detecting whether the package of the object to be detected is transparent package;
When the package of the object to be detected is transparent package, the excitation frequency is adopted to emit laser to the object to be detected, and the Raman scattered light is collected to obtain a Raman scattered spectrum.
Optionally, when detecting whether the package of the object to be detected is a transparent package, the image acquisition mode may be adopted, and when the object in the package can be displayed in the acquired image, it may be determined that the package of the object to be detected is a transparent package, otherwise, it is an opaque package. Or in the import and export customs inspection process, the staff manually inspects the shot image so as to determine whether the package of the object to be inspected is transparent package, and the inspection package mode is not limited in the application.
Alternatively, referring to fig. 2, when the package of the object to be detected is an opaque package, the object to be detected is placed in the tray to be detected, and then laser is emitted to the object to be detected in the tray to be detected by using the excitation frequency, and raman scattered light is collected, so as to obtain a raman scattered spectrum.
When the package of the object to be detected is opaque, the raman laser cannot be directly used for carrying out laser irradiation on the object to be detected, so that the object to be detected needs to be sampled and extracted and then placed in a disc to be detected for laser irradiation.
Optionally, the tray to be detected can be a transparent tray, when the sampled article to be detected is placed in the transparent tray, the transparent packaging effect is achieved, and the tray to be detected can be directly subjected to laser emission, so that the article to be detected can be detected.
In order to ensure the safety of the detection process, the disc to be detected can be a detection disc comprising a cover, and the detection disc is a sealing device after the cover is covered, so that the emission amount can be reduced when the articles to be detected which are easy to be dispersed are placed, and the safety of the detection environment is ensured. When the object to be detected is an object which is not easy to diverge, the object to be detected can be directly placed in the detection tray.
In order to further enhance the intensity of raman scattered light generated during the detection of the object to be detected, the material of the disc to be detected may be set as a magnetic nanomaterial. The magnetic nanomaterial is different from the conventional magnetic nanomaterial in that the characteristic physical length related to magnetism is just in the nanometer level, for example, the magnetic single domain size, the superparamagnetic critical dimension and the like are approximately in the order of 1-100 nm, when the size of the magnetic nanomaterial is equal to the characteristic physical length, abnormal magnetic properties are presented, namely when the excitation frequency is adopted to emit laser light to an object to be detected, photons interact with magnetic substances in the magnetic nanomaterial when the magnetic nanomaterial is irradiated onto the object to be detected, so that the local electromagnetic field on the surface of the magnetic nanomaterial is enhanced, and the Raman signal intensity of molecules of the object to be detected, which is close to the surface of the magnetic nanomaterial, is greatly improved.
In an embodiment, the disc to be detected may also be a detection supporting plate and a plurality of detection plates placed on the detection supporting plate, and the detection supporting plate and the plurality of detection plates are made of magnetic nano materials;
The shape of the detection plate is similar to any plane of the molecular structure of the object to be detected.
Here, the detection plate has a small size, and when the shape of the detection plate is the same as or similar to the shape of any one of the planes of the molecular structure of the object to be detected, the performance of raman detection can be improved, and the intensity of raman scattered light can be enhanced.
For example: thiram is widely used as a pesticide in soil, but excessive use causes serious harm to human and environment, and a molecular structure similar to a triangle exists in the molecular structure of thiram, as shown in fig. 3, so that a detection plate can be set as a triangle plate with a small size, an object to be detected is placed on the triangle plate or between the triangle plates for laser irradiation detection, and raman scattered light can be enhanced.
Optionally, the detection supporting plate can also be arranged into a box body structure and provided with a cover which can be opened and closed, so that the safety of surrounding personnel is protected, and the transmission range of the object to be detected through the air is reduced.
Optionally, in an embodiment, in order to improve the detection accuracy of the object to be detected, the object to be detected may be subjected to dual-spectrum detection, i.e. raman spectrum detection and infrared spectrum detection. And thus may further include, while lasing the article to be inspected with the excitation frequency:
and irradiating the object to be detected by adopting an infrared detector, and collecting an infrared spectrum.
Optionally, if the object to be detected is liquid, in order to obtain a signal with good intensity and characteristics, the focal point of the emission light path of the infrared detector and the surface of the object to be detected may be kept in the same plane, and an infrared spectrum may be collected. Similarly, the focus of the emission light path of the Raman laser is kept on the same plane with the surface of the object to be detected, and a fixed-position laser focusing lens with a proper focus can be adopted at the moment.
When infrared light irradiates an object to be detected, when the vibration frequency or the rotation frequency of a certain group of molecules on the object to be detected is the same as the frequency of infrared light, the molecules absorb energy and transition from the original fundamental state vibration (rotation) energy level to the vibration (rotation) energy level with higher energy, after the molecules absorb infrared radiation, the transition of the vibration energy level and the rotation energy level occurs, light with the wavelength is absorbed by a substance, an absorption peak appears in the corresponding infrared spectrum, and the existence of the corresponding group on the object to be detected can be judged through the absorption peak in the infrared spectrum, so that the detection of the substance is realized.
And step 103, if the vibration peak exists in the Raman scattering spectrum, determining that the target chemical exists in the object to be detected.
In an embodiment, if the object to be detected has the target chemical, the object to be detected is irradiated with the excitation frequency of the target chemical, so that a resonance phenomenon occurs in molecules of the target chemical in the object to be detected, and a significant vibration peak exists on the raman scattering spectrum, otherwise, the vibration peak is not significant, and therefore whether the object to be detected contains the target chemical can be detected through the obtained raman scattering spectrum.
Alternatively, referring to fig. 2, the difference between the incidence frequency and the scattering frequency of the laser light of each chemical is constant, and in order to improve the detection accuracy of the target chemical in the object to be detected, the target chemical may be further determined by the frequency difference. If there is a vibration peak in the raman scattering spectrum, determining that the object to be detected is a target chemical may include:
If a vibration peak exists in the Raman scattering spectrum, calculating the difference value between the frequency of the Raman scattering light and the excitation frequency;
detecting whether the difference value is equal to a preset frequency difference;
And if the difference value is equal to the preset frequency difference, determining the object to be detected as the target chemical.
In this embodiment, when there is a vibration peak in the raman scattering spectrum and the difference between the frequency of the raman scattering light and the excitation frequency is equal to the preset frequency difference, it can be accurately determined that the object to be detected contains the target chemical, and the detection accuracy is high.
In an embodiment, if there is no oscillation peak in the raman scattering spectrum or there is an oscillation peak in the raman scattering spectrum and the difference is not equal to the preset frequency difference, it is determined that the object to be detected does not contain the target chemical.
In an embodiment, if dual spectrum detection is employed, this step may include:
And if a vibration peak exists in the Raman scattering spectrum and an absorption peak appears at a preset position of the infrared spectrum, determining that the target chemical exists in the object to be detected.
Optionally, when the target chemical is determined to be present in the object to be detected, that is, after the components of the object to be detected are identified, the flash point of the object to be detected may be changed because the object to be detected contains other substances in addition to the target chemical. Thus, after determining the presence of the target chemical in the item to be detected, it may further include: detecting the flash point of the object to be detected, determining the flash point of the object to be detected, and detecting whether the flash point is smaller than a preset flash point threshold value; if the flash point is smaller than the preset flash point threshold value, determining that the object to be detected is a flammable and explosive object, and giving an alarm so as to determine whether the object to be detected is the flammable and explosive object according to the flash point, and if the object to be detected is the flammable and explosive object, immediately isolating the object to be detected to prevent the object to be detected from bringing potential safety hazard.
The flash point can also be called as a flash point, which is the lowest temperature at which when the material product and the external air form a mixture, the mixture is flash and burns immediately when contacting with flame, the higher the flash point is, the easier the object is to ignite, the less safe the object is, otherwise, the less easy the object is to ignite, and the safer the object is.
It should be noted that, in this embodiment, the preset flash point threshold is not limited, and in this embodiment, the preset flash point threshold may be set according to requirements or different application scenarios, for example, the detection location of the object to be detected is located at a position with fewer people, where the preset flash point threshold may be relatively set, and if the detection location of the object to be detected is located at a position with more people, the preset flash point threshold may be relatively set to be smaller.
Optionally, when the flash point is not less than the preset flash point threshold, the object to be detected is not inflammable and explosive.
The smaller the flash point of the object to be detected is, the more dangerous the object to be detected is, the higher the temperature of the object to be detected is, the combustion or explosion of the object to be detected can be caused, therefore, the flash point is smaller than the preset flash point threshold value, and the object to be detected is determined to be inflammable and explosive, and then an alarm is required to be immediately given out, so that the combustion or explosion of the object to be detected is avoided, and safety accidents are caused.
Alternatively, in order to enable the dual spectrum detection and the flash point detection to be performed smoothly, the object to be detected may be placed on the circulation track, and the corresponding detection may be performed automatically when the object passes through the corresponding detection point.
The embodiment of the invention provides a detection method of dangerous chemicals, which comprises the steps of obtaining the excitation frequency of a target chemical, further adopting the excitation frequency to emit laser to an object to be detected, and collecting Raman scattered light to obtain a Raman scattered spectrum; if the vibration peak exists in the Raman scattering spectrum, determining that the object chemical exists in the object to be detected, and irradiating the object to be detected by adopting the excitation frequency of the object chemical in the embodiment of the invention, so that molecules of the object chemical in the object to be detected generate resonance phenomenon, thereby enhancing Raman scattering light, enabling the corresponding Raman scattering spectrum to have obvious vibration peak, easily detecting whether the object chemical exists in the object to be detected, and solving the problem that the Raman scattering light intensity is weak and the chemical cannot be detected when the Raman scattering method is adopted to detect the chemical in the prior art.
In addition, the embodiment of the invention also provides a disc to be detected for placing the object to be detected, and the disc is made of the magnetic nano material, so that the Raman scattered light is further enhanced.
According to the embodiment of the invention, the determination of the target chemical through the frequency difference is further improved, so that whether the object to be detected contains the target chemical can be further accurately detected through the laser frequency.
Finally, the embodiment of the invention also provides double-spectrum detection, thereby ensuring the accuracy of the detection result, and after determining that the object to be detected contains the target chemical, the flash point measurement can be performed so as to judge whether the object to be detected belongs to inflammable and explosive objects or not, so that the object to be detected is timely processed, and explosion danger is avoided under the environment with more personnel.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The following are device embodiments of the invention, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 4 shows a schematic structural diagram of a detection device for hazardous chemicals according to an embodiment of the present invention, and for convenience of explanation, only the parts related to the embodiment of the present invention are shown, which is described in detail below:
as shown in fig. 4, the detection device 4 for hazardous chemicals includes: an acquisition module 41, a processing module 42 and a determination module 43.
An acquisition module 41 for acquiring an excitation frequency of the target chemical;
the processing module 42 is configured to emit laser to the object to be detected by using the excitation frequency, and collect raman scattered light to obtain a raman scattered spectrum;
a determining module 43 is configured to determine that the target chemical is present in the object to be detected if there is a vibration peak in the raman scattering spectrum.
In one possible implementation, before the processing module 42 uses the excitation frequency to emit laser light to the object to be detected and collect raman scattered light, the processing module 42 is further configured to:
Detecting whether the package of the object to be detected is transparent package;
the processing module 42 uses the excitation frequency to emit laser light to the object to be detected, and collects raman scattered light, and when obtaining a raman scattered spectrum, is used to:
When the package of the object to be detected is transparent package, the excitation frequency is adopted to emit laser to the object to be detected, and the Raman scattered light is collected to obtain a Raman scattered spectrum.
In one possible implementation, the processing module 42 is further configured to:
When the package of the object to be detected is opaque, placing the object to be detected in the tray to be detected;
the processing module 42 uses the excitation frequency to emit laser light to the object to be detected, and collects raman scattered light, and when obtaining a raman scattered spectrum, is used to:
And transmitting laser to the object to be detected in the disc to be detected by adopting the excitation frequency, and collecting Raman scattered light to obtain a Raman scattered spectrum.
In one possible implementation, the material of the disc to be detected is a magnetic nanomaterial.
In one possible implementation, the disc to be detected includes: the detection support plate and the detection plates are arranged on the detection support plate, and the detection support plate and the detection plates are made of magnetic nano materials;
The shape of the detection plate is similar to any plane of the molecular structure of the object to be detected.
In one possible implementation, if there is a vibration peak in the raman scattering spectrum, the determining module 43 is configured to, when it is determined that the target chemical is present in the object to be detected:
If a vibration peak exists in the Raman scattering spectrum, calculating the difference value between the frequency of the Raman scattering light and the excitation frequency;
detecting whether the difference value is equal to a preset frequency difference;
if the difference is equal to the preset frequency difference, determining that the target chemical exists in the object to be detected.
In one possible implementation, the determining module 43 is further configured to:
if the Raman scattering spectrum does not have a vibration peak value or the Raman scattering spectrum does have a vibration peak value, and the difference value is not equal to the preset frequency difference, determining that the object chemical does not exist in the object to be detected.
In one possible implementation, while the processing module 42 uses the excitation frequency to laser the object to be inspected, it may also be configured to:
When the object to be detected is liquid, keeping the focus of an emission light path of the infrared detector and the surface of the object to be detected in the same plane, and collecting infrared spectrum;
If there is a vibration peak in the raman scattering spectrum, the determining module 43 is configured to, when determining that the target chemical is present in the object to be detected:
And if a vibration peak exists in the Raman scattering spectrum and an absorption peak appears at a preset position of the infrared spectrum, determining that the target chemical exists in the object to be detected.
In one possible implementation, the processing module 42, after determining that the target chemical is present in the item to be detected, is further configured to:
performing flash point detection on the object to be detected, and determining the flash point of the object to be detected;
Detecting whether the flash point is smaller than a preset flash point threshold;
If the flash point is smaller than a preset flash point threshold value, determining that the object to be detected is a flammable and explosive object, and giving an alarm.
According to the dangerous chemical detection device, the acquisition module acquires the excitation frequency of the target chemical, and the processing module transmits laser to the object to be detected by adopting the excitation frequency and acquires Raman scattered light to obtain a Raman scattered spectrum; if the vibration peak exists in the Raman scattering spectrum, the determining module determines that the target chemical exists in the object to be detected, and in the embodiment of the invention, the excitation frequency of the target chemical is adopted to irradiate the object to be detected, so that the molecules of the target chemical in the object to be detected generate resonance phenomenon, the Raman scattering light is enhanced, the peak with obvious vibration exists in the corresponding Raman scattering spectrum, whether the target chemical exists in the object to be detected is easily detected, and the problem that the chemical cannot be detected due to the fact that the Raman scattering light intensity is weak when the chemical is detected by adopting the Raman spectroscopy in the prior art is solved.
In addition, the embodiment of the invention also provides a disc to be detected for placing the object to be detected, and the disc is made of the magnetic nano material, so that the Raman scattered light is further enhanced.
According to the embodiment of the invention, the determination of the target chemical through the frequency difference is further improved, so that whether the object to be detected contains the target chemical can be further accurately detected through the laser frequency.
Finally, the embodiment of the invention also provides double-spectrum detection, thereby ensuring the accuracy of the detection result, and after determining that the object to be detected contains the target chemical, the flash point measurement can be performed so as to judge whether the object to be detected belongs to inflammable and explosive objects or not, so that the object to be detected is timely processed, and explosion danger is avoided under the environment with more personnel.
Fig. 5 is a schematic diagram of a terminal according to an embodiment of the present invention. As shown in fig. 5, the terminal 5 of this embodiment includes: a processor 50, a memory 51 and a computer program 52 stored in said memory 51 and executable on said processor 50. The processor 50, when executing the computer program 52, performs the steps of the above-described embodiments of the method for detecting hazardous chemicals, such as steps 101 through 103 shown in fig. 1. Or the processor 50, when executing the computer program 52, performs the functions of the modules/units in the apparatus embodiments described above, e.g., the functions of the modules/units shown in fig. 4.
By way of example, the computer program 52 may be partitioned into one or more modules/units that are stored in the memory 51 and executed by the processor 50 to complete the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing the specified functions describing the execution of the computer program 52 in the terminal 5. For example, the computer program 52 may be partitioned into the modules/units shown in fig. 4.
The terminal 5 may include, but is not limited to, a processor 50, a memory 51. It will be appreciated by those skilled in the art that fig. 5 is merely an example of the terminal 5 and is not limiting of the terminal 5, and may include more or fewer components than shown, or may combine some components, or different components, e.g., the terminal may further include input and output devices, network access devices, buses, etc.
The Processor 50 may be a central processing unit (Central Processing Unit, CPU), other general purpose Processor, digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 51 may be an internal storage unit of the terminal 5, such as a hard disk or a memory of the terminal 5. The memory 51 may also be an external storage device of the terminal 5, such as a plug-in hard disk, a smart memory card (SMART MEDIA CARD, SMC), a Secure Digital (SD) card, a flash memory card (FLASH CARD) or the like, which are provided on the terminal 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the terminal 5. The memory 51 is used for storing the computer program as well as other programs and data required by the terminal. The memory 51 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other manners. For example, the apparatus/terminal embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on this understanding, the present invention may also be implemented by implementing all or part of the flow of the method of the above embodiment, or by instructing the relevant hardware by a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may be executed by a processor to implement the steps of the method embodiment of detecting each hazardous chemical. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A method for detecting a hazardous chemical, comprising:
Acquiring the excitation frequency of the target chemical;
Transmitting laser to the object to be detected by adopting the excitation frequency, and collecting Raman scattered light to obtain a Raman scattered spectrum;
And if the vibration peak exists in the Raman scattering spectrum, determining that the target chemical exists in the object to be detected.
2. The method for detecting hazardous chemicals according to claim 1, further comprising, before said using said excitation frequency to emit laser light to an object to be detected and collecting raman scattered light to obtain a raman scattered spectrum:
detecting whether the package of the object to be detected is transparent package or not;
Transmitting laser to the object to be detected by adopting the excitation frequency, collecting Raman scattered light to obtain a Raman scattered spectrum, and comprising the following steps:
When the package of the object to be detected is transparent package, the excitation frequency is adopted to emit laser to the object to be detected, and the Raman scattered light is collected to obtain a Raman scattered spectrum.
3. The method for detecting hazardous chemicals according to claim 2, further comprising:
when the package of the object to be detected is an opaque package, placing the object to be detected in a tray to be detected;
Transmitting laser to the object to be detected by adopting the excitation frequency, collecting Raman scattered light to obtain a Raman scattered spectrum, and comprising the following steps:
And transmitting laser to the object to be detected in the disc to be detected by adopting the excitation frequency, and collecting Raman scattered light to obtain a Raman scattered spectrum.
4. The method for detecting hazardous chemicals according to claim 3, wherein the material of the disk to be detected is a magnetic nanomaterial.
5. A method of detecting hazardous chemicals according to claim 3, wherein the disc to be detected comprises: the detection support plate and the detection plates are arranged on the detection support plate, and the detection support plate and the detection plates are made of magnetic nano materials;
the detection plate has a shape similar to any plane of the molecular structure of the object to be detected.
6. The method of any one of claims 1-5, wherein determining that the target chemical is present in the object to be detected if there is a vibration peak in the raman scattering spectrum comprises:
If the Raman scattering spectrum has a vibration peak value, calculating a difference value between the frequency of the Raman scattering light and the excitation frequency;
Detecting whether the difference is equal to a preset frequency difference;
and if the difference value is equal to a preset frequency difference, determining that the target chemical exists in the object to be detected.
7. The method for detecting hazardous chemicals of claim 6, further comprising:
and if the vibration peak value does not exist in the Raman scattering spectrum or the vibration peak value exists in the Raman scattering spectrum and the difference value is not equal to a preset frequency difference, determining that the target chemical does not exist in the object to be detected.
8. The method for detecting a hazardous chemical according to any one of claims 1 to 5, further comprising, while emitting laser light to an article to be detected using the excitation frequency:
illuminating the object to be detected by an infrared detector, and collecting an infrared spectrum;
If there is a vibration peak in the raman scattering spectrum, determining that the target chemical is present in the object to be detected comprises:
And if a vibration peak exists in the Raman scattering spectrum and an absorption peak appears at a preset position of the infrared spectrum, determining that the target chemical exists in the object to be detected.
9. The method of claim 8, further comprising, after determining that the target chemical is present in the item to be detected:
performing flash point detection on the object to be detected, and determining the flash point of the object to be detected;
Detecting whether the flash point is smaller than a preset flash point threshold;
If the flash point is smaller than a preset flash point threshold value, determining that the object to be detected is a flammable and explosive object, and giving an alarm.
10. A hazardous chemical detection device, comprising:
An acquisition module for acquiring an excitation frequency of a target chemical;
The processing module is used for emitting laser to the object to be detected by adopting the excitation frequency, and collecting Raman scattered light to obtain a Raman scattered spectrum;
And the determining module is used for determining that the target chemical exists in the object to be detected if the vibration peak exists in the Raman scattering spectrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411046232.0A CN118566196A (en) | 2024-08-01 | 2024-08-01 | Dangerous chemical detection method, dangerous chemical detection device, dangerous chemical detection terminal and dangerous chemical storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411046232.0A CN118566196A (en) | 2024-08-01 | 2024-08-01 | Dangerous chemical detection method, dangerous chemical detection device, dangerous chemical detection terminal and dangerous chemical storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118566196A true CN118566196A (en) | 2024-08-30 |
Family
ID=92467172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411046232.0A Pending CN118566196A (en) | 2024-08-01 | 2024-08-01 | Dangerous chemical detection method, dangerous chemical detection device, dangerous chemical detection terminal and dangerous chemical storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118566196A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050248758A1 (en) * | 2004-05-07 | 2005-11-10 | Carron Keith T | Raman spectrometer |
| KR20100004458A (en) * | 2008-07-04 | 2010-01-13 | 재단법인서울대학교산학협력재단 | Micro-magnetic substance having surface-enhanced-raman-scattering acitivity |
| US20120257199A1 (en) * | 2011-04-08 | 2012-10-11 | Nanyang Technological University | Method of diagnosing malaria infection in a patient by surface enhanced resonance raman spectroscopy |
| US20150038347A1 (en) * | 2010-03-19 | 2015-02-05 | The University of Wyoming,an institution of higher of the State of Wyoming | Surface enhanced raman spectroscopy |
| CN104865279A (en) * | 2014-02-26 | 2015-08-26 | 清华大学 | Customs supervision item rapid-inspection equipment and method |
| CN104990909A (en) * | 2015-06-26 | 2015-10-21 | 广西壮族自治区梧州食品药品检验所 | Rapid detection method for drugs on basis of handheld Raman spectrometer and handheld intermediate infrared spectrometer |
| CN109164085A (en) * | 2018-08-27 | 2019-01-08 | 嘉兴长维新材料科技有限公司 | A method of methamphetamine class drugs are detected based on Surface enhanced Raman scattering technology |
| CN111579544A (en) * | 2020-05-25 | 2020-08-25 | 重庆冠雁科技有限公司 | Method capable of simultaneously measuring visible near infrared spectrum and Raman spectrum of substance |
| CN221405397U (en) * | 2023-11-27 | 2024-07-23 | 上海沅方科技有限公司 | In-situ electrochemical infrared spectrum-Raman spectrum combined device |
-
2024
- 2024-08-01 CN CN202411046232.0A patent/CN118566196A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050248758A1 (en) * | 2004-05-07 | 2005-11-10 | Carron Keith T | Raman spectrometer |
| KR20100004458A (en) * | 2008-07-04 | 2010-01-13 | 재단법인서울대학교산학협력재단 | Micro-magnetic substance having surface-enhanced-raman-scattering acitivity |
| US20150038347A1 (en) * | 2010-03-19 | 2015-02-05 | The University of Wyoming,an institution of higher of the State of Wyoming | Surface enhanced raman spectroscopy |
| US20120257199A1 (en) * | 2011-04-08 | 2012-10-11 | Nanyang Technological University | Method of diagnosing malaria infection in a patient by surface enhanced resonance raman spectroscopy |
| CN104865279A (en) * | 2014-02-26 | 2015-08-26 | 清华大学 | Customs supervision item rapid-inspection equipment and method |
| CN104990909A (en) * | 2015-06-26 | 2015-10-21 | 广西壮族自治区梧州食品药品检验所 | Rapid detection method for drugs on basis of handheld Raman spectrometer and handheld intermediate infrared spectrometer |
| CN109164085A (en) * | 2018-08-27 | 2019-01-08 | 嘉兴长维新材料科技有限公司 | A method of methamphetamine class drugs are detected based on Surface enhanced Raman scattering technology |
| CN111579544A (en) * | 2020-05-25 | 2020-08-25 | 重庆冠雁科技有限公司 | Method capable of simultaneously measuring visible near infrared spectrum and Raman spectrum of substance |
| CN221405397U (en) * | 2023-11-27 | 2024-07-23 | 上海沅方科技有限公司 | In-situ electrochemical infrared spectrum-Raman spectrum combined device |
Non-Patent Citations (7)
| Title |
|---|
| F.旦尼尔斯，R.A.阿尔伯堤: "《物理化学 下》", 30 June 1986, 上海科学技术出版社 * |
| 夏云: "《分子检测与精准医疗临床应用》", 31 May 2023, 上海交通大学出版社 * |
| 崔大祥: "《纳米技术与精准医学》", 31 March 2020, 上海交通大学出版社 * |
| 张丹慧，张成茂，杨厚波，邹文斌: "《贵金属-石墨烯纳米复合材料的合成及性能》", 31 December 2015, 国防工业出版社 * |
| 张倩: "高分子近代分析方法》", 31 December 2020, 四川大学出版社 * |
| 蔡建刚;郭俊虎;: "手持式红外和拉曼光谱仪实时检测炸药的应用分析", 中国公共安全, no. 19, 1 October 2013 (2013-10-01) * |
| 隋成华;屠潜;鄢波;陈乃波;卢忠;吕斌;: "拉曼光谱在新型毒品快速检测中的应用", 光谱学与光谱分析, no. 11, 15 November 2018 (2018-11-15) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5903719B2 (en) | In-line spectroscopic reader and method | |
| EP2889608B1 (en) | Inspection methods and apparatuses for inspection of liquids | |
| Ehlerding et al. | Resonance‐Enhanced Raman Spectroscopy on Explosives Vapor at Standoff Distances | |
| CA2924251A1 (en) | Differential excitation spectroscopy | |
| Burnett et al. | A forensic case study: the detection of contraband drugs in carrier solutions by Raman spectroscopy | |
| Traboulsi et al. | Investigation of gamma radiation effect on the anion exchange resin Amberlite IRA-400 in hydroxide form by Fourier transformed infrared and 13C nuclear magnetic resonance spectroscopies | |
| CN207923718U (en) | Raman spectrum detection device | |
| CN104865279A (en) | Customs supervision item rapid-inspection equipment and method | |
| US20150022802A1 (en) | Spectroscopy detection system and method for material identification | |
| CN118566196A (en) | Dangerous chemical detection method, dangerous chemical detection device, dangerous chemical detection terminal and dangerous chemical storage medium | |
| CN104428643A (en) | Integrated raman spectroscopy detector | |
| RU2440566C1 (en) | Method for remote detection of oil contamination on water surface | |
| Kascheev et al. | Laser sensor for monitoring radioactive contamination | |
| US10823676B2 (en) | Non-contact type security inspection system and method | |
| Nachtmann et al. | A customized stand-alone photometric Raman sensor applicable in explosive atmospheres: A proof-of-concept study | |
| CN206399836U (en) | Contactless safety check system | |
| Li et al. | Spatially offset Raman spectroscopy detection for food additives components | |
| KR101361178B1 (en) | Management apparatus about Terahertz spectrum data of food and method for therefor | |
| Kaya | Rapid and Highly Selective BODIPY Based Turn‐Off Colorimetric Cyanide Sensor | |
| Grishkanich et al. | Raman lidar for remote control explosives in the subway | |
| Kascheev et al. | Research remote laser methods for radionuclides monitoring | |
| US20250093269A1 (en) | Method for enhancing a raman contribution in a spectrum, spectroscopy system, computer program and non-transitory computer-readable storage medium | |
| Stokes et al. | Raman spectroscopy of illicit substances | |
| US20170299512A1 (en) | Differential Excitation Raman Spectroscopy | |
| Meng et al. | Design of microplastic fluorescence detection system based on tracepro |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |