RU194712U1 - PORTABLE LASER SPARK EMISSION SPECTROMETER - Google Patents

Abstract

The utility model relates to the field of research and analysis of materials and is intended to measure the mass fraction of chemical elements in alloys. The portable laser spark emission spectrometer contains a laser, a laser control circuit, an optical illumination unit, a spectrometer 1 and a spectrometer 2, an integrated computer, a detector matrix, a power source, and the illumination optics of spectrometers 1 and 2 are based on a spherical mirror circuit and flat mirrors for each spectrometer, the focusing optics of the laser source has a fixed focal length, for using portable laser sparks th emission spectrometer with an external source of argon is provided an adapter for a standard bottle. The technical result is the preservation of the dimensions and weight of the device in the framework of the requirements of portable, portable equipment. 2 s.p. f-ly, 3 ill.

Description

FIELD OF TECHNOLOGY

A portable laser spark emission spectrometer is designed to measure the mass fraction of chemical elements in alloys, including in accordance with certified measurement methods.

BACKGROUND OF THE INVENTION

Historically known spectrometers were created using optical schemes of spectrographs preceding them, in which they included an entrance slit, a concave diffraction grating, and photographic film as a radiation detector.

The prior art spectrometer is described in A.M. Livshits, A.V. Peleznev, Yu.A. Levykin “Mobile automated system for sorting metal alloys”, Scientific and technological achievements. Intersectoral Collection of VIMI, 1990, no. 3. This spectrometer contains an entrance slit, a concave diffraction grating, and radiation detectors. But as radiation receivers, linear video signal conditioners (LFVS) are used, in particular linear charge-coupled devices (CCD lines). In this case, not a limited set of distinguished spectral lines is recorded, but extended sections of the spectrum that coincide in length with the photosensitive part of the CCD line.

The disadvantage of this solution is the formation of “blind zones” between CCD arrays sequentially located on the Rowland circle. Even if the CCD arrays are placed close to each other, the “blind zone”, i.e. the lack of reception of radiation will persist between their photosensitive parts. Another disadvantage is the presence of significant dimensions, determined by the radius of curvature of the concave diffraction grating and, accordingly, the diameter of the Rowland circle.

Known techniques described in patent GB 631748 and in patent DE 3621464, the use of mirrors in the optical scheme, including the entrance slit, concave diffraction grating and radiation detector, which allowed to significantly reduce the dimensions of the devices. DE 3621464 provides for the installation of a flat mirror in the center of a Rowland circle with the possibility of rotation about an axis perpendicular to the plane of the Rowland circle in its center. However, the presence of a spectrum scanning mechanism by rotating the mirror in turn leads to cumbersomeness, and, consequently, to an increase in the dimensions of the spectrometer and a decrease in its reliability. In addition, scanning does not allow measuring an extended spectrum at the same time.

Closest to the claimed technical solution is a laser emission spectrometer "Lazer-Z" manufactured by "SciAps, Inc.", USA (record number in the State Register of measuring instruments: 64624-16, date of approval of the verification procedure: 04/13/2016). The main structural elements of the spectrometer are:

- a casing used to accommodate spectrometer units, stabilize analytical conditions and protect the user from radiation;

- a laser, which is a source of plasma and emission spectrum;

- a detector used to convert the quanta of the emission spectrum into an electronic signal - a semiconductor matrix CCD;

- a cylinder with argon, used to determine chemical elements that cannot be determined in ordinary air without preliminary blowing;

- a lithium battery, which serves to provide all parts of the spectrometer with electricity with certain characteristics;

- An integrated computer designed to receive, process and issue information under the control of specialized software.

The disadvantage of the closest to the claimed utility model analogue is that the cylinder with argon is the main structural element due to which:

- firstly, the design of the most portable spectrometer is getting heavier;

- secondly, the used cylinders with argon have design features, which does not allow the consumer to combine "Lazer-Z" with conventional cylinders with argon.

DISCLOSURE OF THE ESSENCE OF A USEFUL MODEL

The technical problem underlying the utility model is to expand the arsenal of portable laser spark emission spectrometers.

The technical result is a reduction in operating costs of the product, namely, the preservation of the dimensions and weight of the device in the framework of the requirements of portable, portable equipment.

The specified technical result is achieved by the fact that a portable laser spark emission spectrometer containing a laser located in the housing, a laser control circuit, an optical illumination unit, spectrometer 1 and spectrometer 2, an integrated computer, a detector matrix, a power source, according to a utility model

The lighting optics of spectrometers 1 and 2 are built on the basis of a mirror scheme containing spherical and flat mirrors for each spectrometer;

the focusing optics of the laser source has a fixed focal length;

to use a portable laser spark emission spectrometer with an external argon source, an adapter for a standard cylinder is provided;

On the casing of a portable laser spark emission spectrometer, there are two handles, an upper handle and a lower handle.

The detector matrix of a portable laser spark emission spectrometer array contains three linear image sensors in each spectrometer.

The inventive utility model is illustrated by drawings, on which are presented:

FIG. 1 is a general view of a portable laser spark emission spectrometer;

FIG. 2 is a functional diagram of a portable laser spark emission spectrometer device;

FIG. 3 - design of the lighting optical unit.

The claimed technical solution contains the following reference position in the drawing:

1 - measurement start button;

2 - integrated computer;

3 - synchronization module;

4 is a diagram of a laser control;

5 - laser;

6 - focusing laser optics;

7 - test sample;

8 - lighting optical unit;

9 - spectrometer 1;

10 - spectrometer 2;

11 - inlet of the spectrometer 1;

12 - inlet of the spectrometer 2;

13 - spherical mirror 1;

14 - spherical mirror 2;

15 - flat mirror 1;

16 - flat mirror 2;

17 - the outer casing;

18 - top handle;

19 - lower handle;

20 - power source;

21 - adapter to a standard cylinder.

The inventive device of a portable laser spark emission spectrometer operates as follows.

To begin work, the operator presses the measurement start button (1), then the signal enters the integrated computer (2), which starts the synchronization module (3) with the laser control circuit (4) that starts the laser (5). The radiation is generated by a laser (4), and, passing through the focusing optics of the laser (6), it hits the object of study (7) and excites a laser plasma on its surface. The breakdown plasma radiation is directed by the illuminating optical unit (8) to spectrometers 1 (9) and 2 (10) through the inlet of the spectrometer 1 (11) and the inlet of the spectrometer 2 (12), due to a system of mirrors including spherical (13), (14 ) and flat mirrors (15), (16). The radiation passing through the inlet holes of the spectrometer (11), (12) incident on the diffraction grating is decomposed by wavelengths and focused on a photosensitive element, converted into an electrical signal and processed in an integrated computer (2), where measurements are processed using a special software providing.

Moreover, all functional elements, namely: an integrated computer (2), a synchronization module (3), a laser control circuit (4), a laser (5), a laser focusing optics (6), an optical illumination unit (8), a spectrometer 1 ( 9) and spectrometer 2 (10), are located in a single housing on which the upper handle (18) and the lower handle (19) are placed.

In the integrated computer (2), measurements are processed using special software. The software also serves to set up spectrometers and perform measurements, including visual analysis of experimental data, analysis and processing of the obtained data.

A source with an output power of less than 100 μJ is used as a laser source of subnanosecond pulses.

As linear image sensors, CMOS type image sensors are used.

Four standard 18650 batteries are used as a power source (20).

For operation, an external argon source is used with an adapter (21) placed on the housing (16) onto a standard industrial cylinder.

It should be noted that any specific configuration and arrangement of various elements of this system does not limit the scope of legal protection. The present utility model is illustrated with concrete examples of possible details, which, however, are not the only possible ones, but clearly demonstrate the possibility of achieving the required technical result by the given set of features.

INDUSTRIAL APPLICABILITY

The proposed portable laser spark emission spectrometer is industrially applicable for measuring the mass fraction of chemical elements in alloys, carried out in accordance with certified methods.

Claims (3)

1. The portable laser spark emission spectrometer contains a laser, a laser control circuit, an optical illumination unit, spectrometer 1 and spectrometer 2, an integrated computer, a detector matrix, a power source, characterized in that the illumination optics of spectrometers 1 and 2 are based on a mirror a circuit containing spherical and planar mirrors for each spectrometer; the focusing optics of the laser source has a fixed focal length; To use a portable laser spark emission spectrometer with an external argon source, an adapter for a standard cylinder is provided. 2. A portable laser spark emission spectrometer according to claim 1, characterized in that the detector matrix of a portable laser spark emission spectrometer contains three linear image sensors in each spectrometer. 3. A portable laser spark emission spectrometer according to claim 1, characterized in that on the body of the portable laser spark emission spectrometer there are two handles, an upper handle and a lower handle.

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