CN109799202B - Device and method for analyzing substances by using electromagnetic wave reflection imaging image - Google Patents
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Abstract
The invention discloses a device and a method for analyzing substances by using an electromagnetic wave reflection imaging graph, wherein one or more light sources with different wavelengths or wave bands are used according to the difference of absorption wavelengths between a target substance and other substances possibly coexisting with the target substance, and a filter for filtering light rays with unnecessary wave bands is matched; before measurement, closing a lens cover, and performing one or more photosensitive shooting on the reference object coating by all light sources to form basic noise zeroing reference data; removing the lens cover, putting the measured substance into the front end of a filter of a sensor in the shell, sequentially irradiating the measured substance by all light sources, receiving reflected waves of each light source on the measured substance by the sensor, and forming image data; the cloud server receives the image data and performs substance analysis. The invention solves the technical problems that the existing spectrum analysis equipment has wide distribution of requirements on spectrum intervals, and high price of the equipment is not beneficial to popularization and use due to the requirement of high-grade light sources, sensors and software.
Description
Technical Field
The present invention relates to the field of material analysis, and more particularly, to a device and a method for material analysis using electromagnetic wave reflection imaging.
Background
In the fields of medicine, criminal investigation, scientific research, food, agriculture, daily use, etc., there is a need for qualitative and quantitative analysis of different substances, wherein spectroscopic analysis is one of the very common methods, and the kind of substances can be determined by using electromagnetic waves of different wavelengths, especially by reflection or excitation spectroscopic analysis of ultraviolet, visible, or near infrared bands. The core principle of the existing spectrum analysis technology is that the curve optical spectrum of a target substance is drawn by recording the absorption rate of the substance to each different wavelength in the wavelength interval as far as possible, and the substance analysis is carried out by extracting the peak characteristic point and comparing the peak characteristic point with the database information.
Different substances have different peak and spectrum curve shapes, so the substances can be qualitatively determined by comparing database models. The physical Full Width Half Maximum (FWHM) interval of the common light source and sensor is about 10nm, and the corresponding image is about 130/cm, so that if the visible resolution is extremely poor when the light source and the sensor are directly used, complex elements and software methods are required for compensation, and the whole equipment is expensive and huge.
Because the spectrum interval is required to be distributed as widely as possible, the adopted light source is expensive, for example, in the near infrared ray interval, the traditional spectrometer can effectively form the spectrum only by adopting a special light source such as a tungsten halogen lamp to generate the wave band distribution of more than 900-2500nm, and other cheap and small light sources such as an LED lamp cannot be applied by traditional equipment because the wave band is too narrow.
On the sensor, the conventional method has high requirements on the band range detected by the sensor, so that the conventional low-cost sensor cannot be used, for example, the sampling range of a carbon-based sensor (CCD) can only upwards detect the infrared band of 1100nm, which is approximately equal to 9100/cm, the conventional method cannot be used for drawing the map, and a rare indium gallium arsenic (InGaSn) sensor and the like are required to be adopted, so that the complexity and the price are thousands times higher than those of the conventional low-cost sensor.
In addition, due to the influence of design principles, a light splitting design must be adopted, and cheaper schemes include a method of light splitting and time sharing by using a fourier filter based on mes, but the error between systems is large, which is a fatal defect for the requirement of traditional mode on accuracy and resolution, and other high-end light splitting systems are complicated and expensive to produce, such as LVF linear graded filters, and tens of hundreds of layers of coating films are required to be carried out through various compounds, and the price is hundreds of times of that of the former.
The method for analyzing the equipment in the market at present is to create a complete spectrogram of the corresponding substances as far as possible and to qualitatively analyze the substances by improving the resolution of the full spectrogram, and the method has broad spectrum adaptability and can detect and distinguish thousands of substances, but the equipment is huge, the price is high, most of the equipment is hundreds of thousands to millions of RMB, and the method is not suitable for being used in large quantity as a primary screening equipment in the first line.
Disclosure of Invention
In order to solve the technical problems that the existing spectrum analysis equipment has wide distribution of requirements on spectrum intervals and high equipment price is not beneficial to popularization and use due to the requirement of high-grade light sources, sensors and software, the invention provides a device and a method for analyzing substances by using an electromagnetic wave reflection imaging graph.
The invention adopts the following technical scheme:
the utility model provides an utilize electromagnetic wave reflection imaging to carry out device of material analysis, includes casing, sensor, light source, control module and communication module, the casing is made by the light-proof magnetism material that hinders, the front end of casing includes openable lens cap, the material of lens cap is the same with the casing, one side scribbles one deck reference thing coating in the lens cap corresponds the casing, reference thing coating is used for the system to return to zero and uses, the sensor install in inside the casing, the sensor is used for gathering the electromagnetic wave signal in required electromagnetic wave band, the light source is installed the sensor periphery, control module is used for controlling light source output light, sensor collection reflection wave band, communication module is arranged in receiving sensor data and sends to the high in the clouds server, the high in the clouds server is arranged in carrying out analysis and output with the image data that the sensor gathered.
Preferably, the number of the light sources is plural, the plural light sources are used for emitting different wave bands or wavelengths
Light rays.
Preferably, the sensor signal receiving end and the transmitting end of the light source are further provided with filters, and the filters are used for filtering redundant electromagnetic wave bands.
Preferably, the sensor, the light source, the control module and the communication module are also connected with a power supply module.
Preferably, the control module, the communication module and the power supply module are located outside the shell.
A method for substance analysis using the above device, the method comprising the steps of: according to the difference of absorption wavelengths between the target substance and other substances possibly coexisting with the target substance, one or more light sources with different wavelengths or wave bands are used, and a filter for filtering out light rays with unnecessary wave bands is matched; before measurement, closing a lens cover, and performing one or more photosensitive shooting on the reference object coating by all light sources to form basic noise zeroing reference data; removing the lens cover, putting the measured substance into the front end of a filter of a sensor in the shell, sequentially irradiating the measured substance by all light sources, receiving reflected waves of each light source on the measured substance by the sensor, and forming image data; the cloud server receives the image data and performs substance analysis.
Preferably, the cloud server performs the substance analysis as follows: the method comprises the steps of respectively testing a pure sample of a tested substance and various samples of the tested substance and other mixtures possibly existing in different proportions and modes for a plurality of times in advance to form a basic database and storing the basic database in a cloud server; the cloud server performs region segmentation on the image data collected by the sensor by taking pixels as units, and compares the segmented image data with basic data; comparing the reflectivity of the whole image and the reflectivity of the unit area under different wave bands with the basic data, determining the basic data with highest similarity, and carrying out qualitative analysis on the detected substance; and obtaining quantitative analysis of the measured substance by comparing the reflectivity of the whole image, the number of unit areas forming reflection with the basic data.
Preferably, the position of the region where the reflection is formed by the whole image can also be used for simply positioning the measured substance.
The beneficial effects of the invention are as follows: the invention discloses a qualitative and quantitative analysis device and a method for known substances by using an imaging chart of electromagnetic wave reflection, which are used for specific one or more known substances, obtain the reflection imaging chart by utilizing the difference of the electromagnetic wave absorption degree of different substances on specific wavelengths, and match a calculation method to perform qualitative and quantitative analysis on the unknown substances.
Drawings
FIG. 1 is a spectral diagram of a typical infrared band exhibited by the present invention;
FIG. 2 is a schematic view of the structure of the device of the present invention;
FIG. 3 is a control schematic of the apparatus of the present invention;
FIG. 4 is a schematic flow chart of the present invention using a substance analysis device;
FIG. 5 is a schematic flow chart of the material analysis according to the present invention;
FIG. 6 is a graph of ultraviolet absorbance of cocaine hydrochloride in an embodiment of the invention;
FIG. 7 is a graph of ultraviolet absorbance of fentanyl citrate in an embodiment of the present invention;
FIG. 8 is a graph of UV imaging of different bands of cocaine hydrochloride and fentanyl citrate mixtures in an embodiment of the present invention.
In fig. 1-8: 1. the device comprises a shell, 2, a light source, 3, a filter, 4, a reference coating, 5, a sensor, 6, a lens cover, 7, a control module, 8, a communication module, 9, a power supply module, 10 and a cloud server.
Detailed Description
The technical scheme of the invention is further specifically described by the following specific embodiments with reference to the accompanying drawings:
examples: the core principle of the existing spectrum analysis technology is that the curve optical spectrum of a target substance is drawn by recording the absorption rate of the substance to each different wavelength in the wavelength interval as far as possible, the substance analysis is carried out by extracting peak characteristic points and comparing database information, as shown in figure 1, the spectrum is a typical infrared band spectrum, the abscissa is centimeter wave number (1/cm), the ordinate is absorption/reflectance, and different substances have different wave peaks and spectrum curve shapes, so that the substance can be characterized by comparing database models. The physical Full Width Half Maximum (FWHM) interval of the common light source and sensor is about 10nm, and the corresponding image is about 130/cm, so that if the visible resolution is extremely poor when the light source and the sensor are directly used, complex elements and software methods are required for compensation, and the whole equipment is expensive and huge.
Because the spectrum interval is required to be distributed as widely as possible, the adopted light source is expensive, for example, in a near infrared ray interval, a traditional spectrometer can effectively form the spectrum by adopting a special light source such as a tungsten halogen lamp to generate the wave band distribution of more than 900-2500nm, and other cheap and small light sources such as an LED lamp cannot be applied by traditional equipment due to the fact that the wave band is too narrow, the embodiment disclosed by the invention is used for analyzing substances according to the difference of ultraviolet ray absorption capacity of the substances, and does not exclude the use of various electromagnetic wave bands such as visible light, infrared rays, microwaves and the like for analyzing the substances.
Referring to fig. 2-3, there is shown a device for analyzing substances by using electromagnetic wave reflection imaging diagram and a control schematic diagram of the device, which comprises a housing 1, a sensor 5, a light source 2, a control module 7 and a communication module 8, wherein the housing 1 is made of opaque magnetic-resistant material, the front end of the housing 1 comprises an openable lens cover 6, the material of the lens cover 6 is the same as that of the housing, one side of the lens cover 6 corresponding to the housing 1 is coated with a reference substance coating 4, the reference substance coating 4 is used for system zero setting, the sensor 5 is installed in the housing 1, the sensor 5 is used for collecting electromagnetic wave signals in a required electromagnetic wave band range, a filter 3 is further arranged at the signal receiving end of the sensor 5 and the transmitting end of the light source 2, the filter 3 is used for filtering redundant electromagnetic wave bands, the light source 2 is installed at the periphery of the sensor 5, the number of the light sources 2 is plural, the plural light sources 2 are used for emitting light rays with different wavebands or wavelengths, the light sources 2 capable of emitting light rays with specific wavebands can be selected according to the required waveband range, the light sources 2 with wider range can be selected, the corresponding filters 3 can be added between the light sources 2 and the tested substances, only the light rays with specific wavebands can irradiate the tested substances, the filters 3 can be manufactured without adding the filters 3 or adopting high-transmittance materials to ensure the light passing rate, the sensor 5, the light sources 2 and the filters 3 are placed in a shell 1, the shell 1 is made of materials capable of preventing visible light and other electromagnetic waves capable of interfering imaging, the shell 1 is provided with a lens cover 6 which is made of the same materials and capable of being opened and closed, the lens cover 6 is coated with a reference object coating 4 which can be used as a system for zeroing the inner cavity part, the reference object coating can be selected according to different application scenes, wave bands or production cost and other factors.
The sensor 5 is a sensor 5 that is sensitive to electromagnetic wave signals in a desired band of wavelengths, including but not limited to a Charge Coupled Device (CCD). The sensor 5 may be sensitive only to the desired band range, or may be a ubiquitous sensor 5 sensitive to a wider range of bands. If the sensor 5 is sensitive to a wide range of wave bands, a corresponding filter 3 can be optionally added between the sensor 5 and the measured substance to filter the light intake of the unwanted wave bands and improve the sensitivity of the wanted wave bands. The filter 3 may be omitted or the filter 3 may be made of a high-transmittance material to improve the passing rate. The filter 3 can be inserted and removed for replacement so as to meet the detection requirements of the sensor 5 on different wave bands.
The control module 7 is used for controlling the light source 2 to output light and the sensor 5 to collect reflection bands, the communication module 8 is used for receiving the data of the sensor 5 and sending the data to the cloud server 10, the cloud server 10 is used for analyzing and outputting the image data collected by the sensor 5, and the sensor 5, the light source 2, the control module 7 and the communication module 8 are also connected with the power supply module 9, in this embodiment, the control module 7, the communication module 8 and the power supply module 9 are located outside the shell 1, and the invention also does not exclude the technical scheme that the power supply module 9 is a built-in lithium battery or a battery.
The charging mode of the power supply module 9 can be a fixed power line or a fixed power line interface, such as a standard charging port of an android mobile phone, the charging process is finished through an external wiring, and non-contact charging can be performed through a wireless charging mode. The power supply module 9 may also be connected to a data terminal such as a smart phone, a computer, etc. through a fixed USB cable interface, and obtains power supply from the data terminal device.
The communication module 8 can be used for receiving and sending image data through different wireless communication modes such as GSM/GPRS, narrowband Internet of things, bluetooth, wi-Fi, zigbee and the like, the communication module 8 can also be connected with a data terminal such as a smart phone through Bluetooth and wired connection, and the data is sent to the cloud server 10 through the data terminal for analysis and data generation.
A method for substance analysis using the device of the present invention is shown in fig. 4, and comprises the steps of:
s1, using one or more light sources 2 with different wavelengths or wave bands according to the difference of absorption wavelengths between a target substance and other substances possibly coexisting with the target substance, and matching with a filter 3 for filtering light rays with unnecessary wave bands;
s2, before measurement, closing a lens cover 6, and carrying out one or more photosensitive shooting on the reference object coating 4 by all the light sources 2 to form basic noise return-to-zero reference data;
s3, removing a lens cover 6, putting a tested substance into the front end of a filter 3 of a sensor 5 in the shell 1, sequentially irradiating the tested substance by all light sources 2, and receiving reflected waves of each light source 2 on the tested substance by the sensor 5 to form image data;
s4, the cloud server 10 receives the image data and performs substance analysis.
The cloud server 10 performs the steps of:
s5, testing pure samples of the tested substances and various samples of the tested substances and other mixtures possibly existing in different proportions and modes respectively for a plurality of times to form a basic database and storing the basic database in the cloud server 10;
s6, the cloud server 10 divides the image data collected by the sensor 5 into areas by taking pixels as units, and the cloud server 10 compares the divided image data with basic data;
s7, comparing the reflectivity of the whole image and the reflectivity of the unit area under different wave bands with the basic data, determining the basic data with the highest similarity, and carrying out qualitative analysis on the detected substance;
s8, quantitatively analyzing the detected substance by comparing the whole image reflectivity, the number of unit areas forming reflection and the basic data;
s9, simply positioning the tested substance through the position of the area where the whole image forms reflection.
The specific operation of the substance analysis method described in the present invention is illustrated by analyzing whether fentanyl citrate is contained in cocaine hydrochloride:
in criminal investigation, fentanyl citrate is a trace lethal addictive substance which is thousands of times stronger than a common drug, so that it is required to ascertain whether the tested cocaine hydrochloride contains fentanyl citrate or not, and the target substance in the scene is fentanyl citrate. The absorption rates of cocaine hydrochloride and fentanyl citrate in the ultraviolet band are shown in fig. 6 and 7, respectively.
Selecting a band with specificity by screening:
1. absorbance at 280 nm: fentanyl citrate 0% cocaine hydrochloride 27%
2. Absorbance at 260 nm: fentanyl citrate 40% cocaine hydrochloride 20%
3. 245nm absorbance: fentanyl citrate 45% cocaine hydrochloride 100%
4. Absorbance at 240 nm: fentanyl citrate 80% cocaine hydrochloride 100%
The appropriate light source 2 and sensor 5 are selected according to the selected wavelength band, or the filter 3 of the light source 2 and sensor is changed. After the basic noise return-to-zero reference data are formed, the known pure fentanyl citrate, cocaine hydrochloride and the mixture of the known pure fentanyl citrate and cocaine hydrochloride in different proportions are irradiated and collected for multiple times through equipment, and an input algorithm is used for forming a standard model. In daily application, the device disclosed by the invention can be used for irradiating and collecting cocaine hydrochloride possibly containing fentanyl citrate, inputting the cocaine hydrochloride into a standard model for comparison, and carrying out qualitative and quantitative analysis on a mixture of the fentanyl citrate and the cocaine hydrochloride with unknown proportion.
The qualitative and quantitative judgment can be roughly carried out by an artificial visual reference picture, as shown in the figure 8, the imaging picture of the cocaine hydrochloride and fentanyl citrate mixture under ultraviolet rays of different wavebands can be visually formed into a reflected white bright spot which occupies about 10% of the area under the irradiation of the ultraviolet rays of 280nm, and the picture has darker and darker color under the irradiation of the ultraviolet rays of 280-240nm, so that the absorption effect is better and better, and the content of the fentanyl citrate contained in the cocaine hydrochloride can be estimated to be about 10%.
The above-described embodiment is only a preferred embodiment of the present invention, and is not limited in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims.
Claims (2)
1. The method for analyzing the substances by using the device for analyzing the substances by using the electromagnetic wave reflection imaging image is characterized by comprising a shell, a sensor, a light source, a control module and a communication module, wherein the shell is made of opaque magnetic blocking materials, the front end of the shell comprises an openable lens cover, the material of the lens cover is the same as that of the shell, one side of the lens cover, which corresponds to the shell, is coated with a reference object coating, the reference object coating is used for system zeroing, the sensor is arranged in the shell, the sensor is used for collecting electromagnetic wave signals within the range of a required electromagnetic wave band, the light source is arranged at the periphery of the sensor, the control module is used for controlling the light source to output light rays, the sensor to collect reflection wave bands, the communication module is used for receiving sensor data and sending the sensor data to a cloud server, and the cloud server is used for analyzing and outputting the image data collected by the sensor; the number of the light sources is plural, and the plural light sources are used for emitting light rays with different wave bands or wavelengths; the sensor signal receiving end and the light source transmitting end are also provided with filters, and the filters are used for filtering redundant electromagnetic wave bands;
the method comprises the following steps: according to the difference of absorption wavelengths between the target substance and other substances possibly coexisting with the target substance, one or more light sources with different wavelengths or wave bands are used, and a filter for filtering out light rays with unnecessary wave bands is matched; before measurement, closing a lens cover, and performing one or more photosensitive shooting on the reference object coating by all light sources to form basic noise zeroing reference data; removing the lens cover, putting the measured substance into the front end of a filter of a sensor in the shell, sequentially irradiating the measured substance by all light sources, receiving reflected waves of each light source on the measured substance by the sensor, and forming image data; the cloud server receives the image data and performs substance analysis;
the cloud server performs the following steps of: the method comprises the steps of respectively testing a pure sample of a tested substance and various samples of the tested substance and other mixtures possibly existing in different proportions and modes for a plurality of times in advance to form a basic database and storing the basic database in a cloud server; the cloud server performs region segmentation on the image data collected by the sensor by taking pixels as units, and compares the segmented image data with basic data; comparing the reflectivity of the whole image and the reflectivity of the unit area under different wave bands with the basic data, determining the basic data with highest similarity, and carrying out qualitative analysis on the detected substance; and obtaining quantitative analysis of the measured substance by comparing the reflectivity of the whole image, the number of unit areas forming reflection with the basic data.
2. A method for analyzing a substance using the apparatus as defined in claim 1, wherein the position of the area where the reflection is formed by the whole image is also used for simple positioning of the substance to be measured.
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| CN111487244B (en) * | 2020-05-09 | 2023-05-26 | 青岛合启立智能科技有限公司 | PH value detection device based on color change |
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| JP2017044562A (en) * | 2015-08-26 | 2017-03-02 | 三菱電機株式会社 | Observation device |
| CN107870149A (en) * | 2017-11-01 | 2018-04-03 | 武汉能斯特科技有限公司 | A kind of method and apparatus of spectrum of measurement and application thereof |
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