RU171154U1 - Portable multifunctional device for detecting and identifying traces of polymer nature by fluorescence intensity - Google Patents

Abstract

The utility model relates to devices for detecting and identifying traces of a polymeric nature that can be used in forensics during preliminary forensic investigations on “hot traces” when conducting screening activities in transport, roads, airports, and is an effective means of combating traffic violators, with criminals who left traces of rubber shoes, traces of automobile and bicycle tires, home-made silencers for pistols, clothes, fibers, plastics, fluorescent additives, etc. The technical result of the claimed utility model is the creation of a portable multifunctional device for detecting and identifying traces of polymer nature, capable of simply and accurately identifying polymers, evaluating the fluorescence intensity of samples in numerical terms. The technical result is achieved by the claimed portable multifunctional "Device" for detecting and identifying traces of polymer nature by fluorescence intensity of the content LED UV lamps in the container, photosensor, microcontroller, computers, microUSB, GSM transceiver, UV intensity regulator, touch display, on / off button, battery, pen, contact groups, protective cover, magnetic insert and protective coating, which, in turn, are located in three blocks. A portable multifunctional device for detecting and identifying traces of polymer nature by fluorescence intensity, containing a container in the form of a cylindrical container, an on / off button, and light sensor, sensor, transceiver, battery, charger input, as well as an opaque container housing a built-in photosensor, microcontroller, computers, touch screen, LED UV lamps, light intensity control, GSM transceiver, microUSB port, contact groups, magnetic insert, as well as a protective cover and handle for transportation.

Description

The utility model relates to devices for detecting and identifying traces of a polymer nature that can be used in forensics during preliminary forensic investigations on “hot traces” when conducting screening activities in transport, roads, airports and is an effective means of combating traffic offenders and criminals that left traces of rubber shoes, traces of automobile and bicycle tires, home-made silencers for pistols, clothes, fibers, plastics, containing fluorescent additives, etc.

The study of fibers, plastics, rubber products containing fluorescent additives is carried out with the aim of establishing the detected particles to polymers, determining their generic, group affiliation of the material of comparative objects.

In the course of the study of polymers, optical microscopy methods are applied, studies are carried out when processing with organic solvents, acids, alkalis and the behavior of heating and exposure to open flame is evaluated.

Microscopic studies of polymers reveal signs of the external and internal morphology of the compared objects to identify the color, transparency, thickness, uniformity of the material, monolayer or multilayer, the presence of fillers, inclusions, dirt, traces of relief, traces of hardness, ductility, elasticity, elasticity, etc. [Mitrichev BC Khrustalev V.N. “Basics of the forensic investigation of materials, substances and products from them” - St. Petersburg: Peter., 2003 - p. 591: ill. - (series "textbook")].

A portable multifunctional device for detecting and identifying traces of a polymer nature by fluorescence intensity, hereinafter referred to as the “Device”, is a cylindrical container with three blocks, of which in block (1) there is a protective cover, a magnetic insert, LED UV lamps, a photosensor , in block (2) there is a contact group (1), a microcontroller, an electronic computer (computer), a touch screen, a GSM transceiver, microUSB, a UV radiation intensity regulator, two threaded connections ( threaded connection is understood as a detachable connection made using threaded fasteners, screws, bolts, studs, nuts or threads applied directly to the parts to be joined (Thread and threaded connections: guidelines / A.Ya. Shvets, A.Yu. Kalinin, OA Yakovuk. - M .: MSTU "MAMI", 2011)), and the unit (3) has a contact group (2), a battery and an input for connecting a charger. The “device” also has a handle for transportation.

Many devices are known for detecting and identifying traces of various substances based on exposure to UV radiation: Neozone-D, drugs, wines, berry juices, organic synthesis products, chelate complexes, complex mixtures of high molecular weight carbohydrates, bitumen composition, etc.

In world practice, for the detection and identification of polymers, as a rule, highly analytical equipment is used: infrared Fourier spectrometers, emission spectral and X-ray methods of analysis, as well as thin-layer gas and gas-liquid chromatography, etc. When studying rubbers filled with plastics, fibers, one must take into account that rubber, for example, has a very complex composition. These are various rubbers or a mixture of rubbers, activators, fillers, vulcanizing agents, plasticizers, etc. These methods and techniques for the study of rubber, plastics, fibers are very complex and time-consuming and are destructive methods.

A utility model is known. Patent RUS No. 152626 of 06/10/2015, Bull. No. 16, authors Lobacheva G.K. and others, which presents the "Device for the detection, collection, transportation, storage, analysis and identification of traces of rubber on the examined surfaces", which describes the luminescent analysis of rubber used in forensics. The disadvantages of the Patent are weak luminescence, the inability to accurately identify tire tracks, especially when the tires are made of the same rubber, and there is no way to determine the fluorescence intensity in numerical terms in order to identify samples.

As an analog, we took the Patent for the invention “Detector of currencies, securities and documents” - RU 2577197 C, IPC Y07D 7/00, publ. 03/10/2016, B.I. Number 7.

The disadvantages of the known device should recognize its complexity, high cost and the inability to assess the intensity of fluorescence in a digital image.

Known utility model PM "Device for authenticating a document protected from fakes" PRO CUBE "". Patent for PM No. 131221 U / publ. 08/10/2013 B.I. Number 22.

The disadvantage of the “Device” should be recognized as its complexity, high cost and inability to assess the intensity of the color fluorescence in a digital image.

The Patent for the invention “The method for determining the authenticity and dignity of banknotes and the Bars banknote sorting machine”, No. 2158443 C, Y07D 7/00, Y06K 9/00, taken by us for an analogue, is known. According to this patent, a method for determining the authenticity and dignity of a bankrupt is that the banknote is illuminated with visible infrared and ultraviolet light, a decision is made on the authenticity and dignity of the banknote, the banknote is scanned with a scanning device, and the complete images are transmitted to a comparator, which is pre-set to pattern recognition program.

The disadvantages of this invention is the inability to assess the intensity of fluorescence in numerical terms, the high cost and inability to use this machine at the scene.

The well-known "Dosimeter of ultraviolet radiation", taken by us as an analogue Patent No. 2572459 C, IPC Y001J 1/58, publ. 01/10/2016, B.I. No. 1.

The ultraviolet radiation dosimeter contains a luminescent glass sensor and a photodetector, the sensor is made in the form of a fiber made of glass with a neutral molecular silver cluster and is optically coupled to the photodetector via a transmitting optical fiber.

The disadvantages of the invention are the inability to estimate the fluorescence intensity in numerical terms, the high cost, distortion of the result, reduced sensitivity of the measurements due to heating of the photodetector and electromagnetic interference.

The patent for invention C No. 105097981 (A), IPC H01L 31/101, publ. 2015-11-25 "Ultraviolet photosensor, manufacturing method and method for detecting ultraviolet radiation", using an ultraviolet photosensor.

The disadvantage is the inability to evaluate the fluorescence intensity in digital equivalent and the difficulty in operation.

The closest technical solution is the Sciolatin infrared spectrophotometer, which we took as a prototype, includes a light source that illuminates the sample and an optical sensor called a spectrometer that collects the light reflected from the sample. A spectrometer that includes all the information necessary to determine the result of this interaction between light and the molecules in the sample.

Scio transmits the results from the spectrometer in real time to a smartphone using a wireless network. The data are compared with the database indicators and, if they match, the results are displayed on the smartphone's display.

Scio is based on IR spectroscopy. The physical basis for this method is that each type of molecule vibrates in its own unique way, and these vibrations interact with the light from the IR source to create a unique optical “signature”.

Advanced algorithms use an updated database to analyze the spectrum for milliseconds and transfer information about the test sample back to the user's smartphone in real time [https://w.w.w.consumerphysics.com/mysscio/technology].

The disadvantage of the prototype is the inability to use Scio to detect and identify traces of a polymer nature under the influence of UV radiation, as well as to obtain information about the sample in a digital image from the fluorescence intensity.

The technical result of the claimed utility model is the creation of a portable multifunctional device for detecting and identifying traces of polymer nature capable of simply and accurately identifying polymers and evaluating the fluorescence intensity of samples in a digital image.

The technical result is achieved by the fact that the claimed portable multifunctional “Device” for detecting and identifying the fluorescence intensity of traces of polymer nature, contains LED UV lamps, a photosensor, a microcontroller, a computer, microUSB, a GSM transceiver, a UV intensity regulator, and a touch display, on / off button, battery, pen, contact groups, protective cover, magnetic insert, which in turn are located in three blocks.

The “Device” described above allows achieving such a technical result as the simplicity of working with the “Device”, the ability to obtain in figures the fluorescence intensity of the compared samples and make an unambiguous decision on their identification.

Fluorescence is a type of luminescence. This is radiation caused by the excitation of molecules by various factors. In our case, fluorescence appears under the influence of ultraviolet radiation. The main parameter of the spectrum is the fluorescence intensity.

The utility model is illustrated by drawings, where in FIG. 1 shows the appearance of the “Device”, in FIG. 2 is a block diagram of the interaction of the elements of the "Device".

The device - 1 consists of three blocks: block (1) -17 contains a protective cover - 8, a magnetic insert - 16, LED UV lamps - 3, a photosensor - 2, block (2) -2 contains a contact group (1) - 4, a microcontroller - 5, a computer - 3, a touch-display-14, a GSM-9 transceiver, microUSB - 12, a UV-radiation intensity regulator - 10, a contact group (2) -7 and two threaded connections - 21, and a block (3 ) -19 contains contact group (2) -7, the battery is 6, the input for connecting the charger is 20, and the handle for transportation is 11 (Fig. 1).

All elements of the "Device" are in constructive and functional unity with each other. The constructive unity of the elements of the claimed “Device” is ensured by the fact that they are connected to each other.

When connecting blocks (1, 2, 3) -17, 18, 19 using two threaded connections-21 and setting the on / off-15 button to the on position, device-1 is provided with electricity through contact groups (1,2) -4, 7, after which the EVM-13, the microcontroller - 5, the photosensor - 2, the LED UV lamps, the light intensity regulator - 10 and the touch display-14 are brought into operation, i.e. ready to go.

When the device is directed to 1 with the optimal radiation intensity by diode UV lamps, 3 to objects of polymer nature, whether it is rubber, fiber, fabric, plastic, which contain fluorescent substances, photosensor 2 picks up radiation, it is transmitted through contact group (1) -4 the signal to the microcontroller - 5, where the received signal is processed and converted into digital information, which is transmitted to the computer-13, which in turn processes and displays the results on the touch display-14.

After completing the assessment of the fluorescence intensity of the objects of the preliminary study, the results obtained using the GSM-9 transceiver are sent to the database.

Using the UV intensity regulator - 10, optimal brightness is set for the entire study.

The protective cover - 8 is made of magnetic material, protects the LED paws of UV radiation - 3 and the photosensor - 2 from mechanical damage with the help of a magnetic insert - 16, installed in block (1) - 17.

For convenient transportation, the device - 1 is equipped with a handle - 11.

To extract the received information, device - 1 is equipped with a microUSB-12 port for receiving and transmitting data.

In order to ensure long-term operation, the device - 1 is equipped with an input - 20 for the charger - 20, through which the battery-6 is charged.

Two threaded connections - 21 are designed to connect blocks (1, 2, 3) - 17, 18, 19 into a single device.

In FIG. 2 shows a block diagram of the interaction of the elements of the "Device".

Technical data of the elements of the "Device":

1. Microcontroller - Arduino Nano 3.0 ATmega 168 has 16 kB flash memory for storing program code;

2. The battery is 9 volts of the “Krona” type (6F 22.9 in) capacity of 250 mA / h voltage of 8.4 V;

3. Port - microUSB;

4. Case "Devices" - material: aluminum;

5. Protective coating - chlorosulfonated polyethylene;

6. In the case, diode lamps, UV emitter, operating voltage (2-6.0 V, wavelength - 220 nm)

7. Number of UV diode lamps: 7

8. Photosensor - optical sensor;

The proposed utility model was tested in the laboratory of the Interior Ministry of the Russian Federation.

We investigated several samples of polymer nature with fluorescent substances, the obtained values of the fluorescence intensity are shown in table 1.

The dependence of the fluorescence intensity of samples of polymer nature in arbitrary units on the concentration of the fluorescent substance and on the nature of the polymer is established, which allows identification of traces of polymer nature.

Claims (1)

A portable multifunctional device for detecting and identifying traces of a polymer nature by fluorescence intensity, containing a container in the form of a cylindrical container, an on / off button, a light source, a sensor, a transceiver, a battery, an input for connecting a charger, characterized in that it is in an opaque container body built-in photosensor, microcontroller, computers, touch display, LED ultraviolet lamps, light intensity control, GSM transceiver, microUSB t, two contact groups, a magnetic insert, as well as a protective cover and a handle for transportation.

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