CN117405616B - Handheld colorless precious stone measuring device and measuring method - Google Patents
Handheld colorless precious stone measuring device and measuring method Download PDFInfo
- Publication number
- CN117405616B CN117405616B CN202311718162.4A CN202311718162A CN117405616B CN 117405616 B CN117405616 B CN 117405616B CN 202311718162 A CN202311718162 A CN 202311718162A CN 117405616 B CN117405616 B CN 117405616B
- Authority
- CN
- China
- Prior art keywords
- colorless
- thermal conductivity
- test
- light source
- gemstone
- 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.)
- Active
Links
- 239000010437 gem Substances 0.000 title claims abstract description 230
- 229910001751 gemstone Inorganic materials 0.000 title claims abstract description 203
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 297
- 239000010432 diamond Substances 0.000 claims abstract description 73
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 60
- 230000003287 optical effect Effects 0.000 claims abstract description 51
- 238000012545 processing Methods 0.000 claims abstract description 38
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 238000002835 absorbance Methods 0.000 claims abstract description 6
- 239000000523 sample Substances 0.000 claims description 90
- 230000005284 excitation Effects 0.000 claims description 76
- 230000005855 radiation Effects 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 24
- 238000010521 absorption reaction Methods 0.000 claims description 16
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000031700 light absorption Effects 0.000 claims description 6
- 238000000691 measurement method Methods 0.000 claims description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 17
- 229910052799 carbon Inorganic materials 0.000 abstract description 17
- 239000000377 silicon dioxide Substances 0.000 abstract description 17
- 238000001514 detection method Methods 0.000 description 12
- 239000013078 crystal Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 238000009529 body temperature measurement Methods 0.000 description 7
- 239000010431 corundum Substances 0.000 description 7
- 229910052593 corundum Inorganic materials 0.000 description 7
- 239000010987 cubic zirconia Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000004020 luminiscence type Methods 0.000 description 7
- 230000000670 limiting effect Effects 0.000 description 6
- 239000011029 spinel Substances 0.000 description 6
- 229910052596 spinel Inorganic materials 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 5
- 238000005424 photoluminescence Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 230000002441 reversible effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 210000004243 sweat Anatomy 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
-
- 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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/87—Investigating jewels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (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)
- Spectroscopy & Molecular Physics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The application relates to a handheld colorless gemstone measuring device and a measuring method, belongs to the colorless gemstone testing field, and solves the problem that the existing portable gemstone identifying equipment cannot realize comprehensive and effective identification and distinguishing of colorless gems. The hand-held colorless precious stone measuring device comprises a handle shell, a display screen, a testing module and a processing module; the testing module is used for measuring the colorless precious stone sample to be tested; the processing module is connected with the testing module and used for controlling the operation of the testing module, receiving the measurement data and processing the measurement data; in a thermal conductivity test mode, the thermal conductivity of a colorless precious stone sample to be tested is measured, so that the colorless precious stone with low thermal conductivity and high thermal conductivity can be distinguished; in the ultraviolet optical test mode, the distinction between natural diamond, synthetic carbon silica and laboratory cultured diamond is realized by measuring the absorbance characteristics of a colorless gemstone sample to be measured in a specific target ultraviolet band. The invention realizes the test of all kinds of colorless precious stones, and the accuracy of the test result is high.
Description
Technical Field
The application belongs to the technical field of colorless precious stone testing, and particularly relates to a handheld colorless precious stone measuring device and a measuring method.
Background
Diamond is known as one of precious stones and is known as the king of precious stones. Precious stones similar to natural diamonds may be referred to as diamond imitations, including synthetic cubic zirconia, synthetic carbon silica, synthetic colorless corundum, synthetic colorless spinel, colorless crystals, and the like. Meanwhile, the artificial diamond can be called a laboratory grown diamond (which can be called simply grown diamond), and common natural diamond, diamond imitation and laboratory grown diamond are colorless precious stones. Since the cost of producing diamond imitations and laboratory grown diamonds is far lower than natural diamonds, there are illegal merchants that use diamond imitations and laboratory grown diamonds to deceive consumers and obtain high profits from them.
In the identification of diamond imitation and laboratory cultured diamond, the detection and identification are usually carried out by professional detection personnel through various optical instruments and equipment under laboratory detection conditions, and the identification and judgment by naked eyes are extremely difficult for common jewelry practitioners. Because precious stones have complexity in the scenes of purchase, trade, recovery and the like, the precious stones cannot be sent to a laboratory for detection and identification, identification needs to be completed in a short time in a trade site, and many practitioners often distinguish the precious stones of the imitation precious stones of the precious stones or the cultivated diamonds of the laboratory by means of some portable precious stone identification devices such as a thermal conductivity meter, a conductivity meter, an ultraviolet lamp and the like.
Currently, the common portable precious stone identifier devices all have the problems of functional limitation and singleness: the conductivity meter can only distinguish synthetic carbon silica by testing the conductivity of the gemstone; the thermal conductivity meter can only distinguish synthetic cubic zirconia, colorless synthetic corundum and the like by testing the thermal conductivity of the precious stone; uv lamp devices can only distinguish between a very small fraction of laboratory grown diamonds by testing the uv luminescence of the gemstone. The common colorless precious stones are different in mechanics, optics, chemistry, heat and electromagnetism, and the current common portable precious stone identification equipment cannot realize comprehensive and effective identification and distinction of the colorless precious stones, so that a plurality of holes utilizing the equipment testing principle exist, and illegal commercial behaviors of cheating and cheating are performed.
In summary, the existing portable precious stone identification device only has a single test function, and the single identification device can only identify one or a few precious stones to be tested, so that the test of the colorless precious stones of all varieties cannot be realized. Moreover, misjudgment and missed judgment can occur by adopting a single certain identification device; although the combined test of the linkage of a plurality of instruments and equipment can meet the better effect, a plurality of identification devices such as a thermal conductivity meter, a conductivity meter and an ultraviolet lamp are required to be carried at the same time, so that the portable requirement cannot be met, the reliability of the identification result is poor, and the test effect is poor.
Disclosure of Invention
In view of the above, the present invention is directed to a handheld colorless gemstone measurement device and measurement method, which solves one or more of the above-mentioned problems of the prior art.
The purpose of the invention is realized in the following way:
a hand-held colorless gemstone measurement device, comprising:
the handle shell is used for being held by an operator, a first cavity and a second cavity which are arranged along the length direction of the handle shell are formed in the handle shell, an opening is formed in the first end of the handle shell, and the opening is communicated with the first cavity;
the testing module is arranged in the first cavity, and the testing end of the testing module extends out of the opening to be used for measuring the colorless precious stone sample to be tested;
the processing module is arranged in the second cavity, connected with the testing module and configured to control the operation of the testing module, receive the measurement data and process the measurement data;
the display screen is arranged on the surface of the handle shell, connected with the processing module and configured to display the guiding of the testing process and display the testing result;
the test module is provided with a thermal conductivity test module and an ultraviolet optical test module, so that the test module is provided with a thermal conductivity test mode and an ultraviolet optical test mode;
In a thermal conductivity test mode, the distinction between the colorless precious stone with low thermal conductivity and the colorless precious stone with high thermal conductivity is realized by measuring the thermal conductivity of a colorless precious stone sample to be measured;
in the ultraviolet optical test mode, the distinction between the colorless precious stone with strong ultraviolet light absorption and the colorless precious stone with weak ultraviolet light absorption is realized by measuring the absorbance characteristic of the colorless precious stone sample to be measured in a specific target ultraviolet band.
Further, the test module further comprises a structural connector, and the thermal conductivity test module and the ultraviolet light test module are connected to the structural connector.
Further, the structural connecting piece comprises a flat plate bracket, a vertical plate and a square connecting plate, wherein the space above the flat plate bracket is a second cavity, and the space below the flat plate bracket is a first cavity; the lower end face of the flat plate bracket is provided with a vertical plate, and the thermal conductivity testing module is arranged on the vertical plate and is positioned on the first side of the vertical plate; a square connecting plate is arranged below the flat plate bracket, and the ultraviolet light testing module is arranged on the square connecting plate and is positioned on the second side of the vertical plate; the square connecting plate is fixedly connected with the lower end face of the flat plate bracket through four connecting rods, and the square connecting plate is parallel to the lower surface of the flat plate bracket.
Further, a guide groove which is vertically arranged is arranged on the side surface of the vertical plate, and the thermal conductivity testing module is movably arranged in the guide groove and can linearly reciprocate along the guide groove; the thermal conductivity testing module is provided with a mounting groove, a spring is arranged in the mounting groove, one end of the spring is abutted against the groove wall of the mounting groove, and the other end of the spring is abutted against the lower end face of the flat plate bracket; when the test end of the thermal conductivity test module is pressed down to enable the test end of the thermal conductivity test module to be in contact with the surface of the colorless precious stone sample to be tested, the test end of the thermal conductivity test module can move towards the direction of the flat plate bracket, and at the moment, the spring compression can provide elastic force which extends outwards for the test end of the thermal conductivity test module.
Further, the thermal conductivity testing module comprises a thermocouple, a thermistor and a temperature sensor; the flat plate bracket is provided with a through hole communicated with the guide groove, the first end of the temperature sensor is positioned above the through hole, and the size of the first end of the temperature sensor is larger than that of the through hole; the spring is connected between the temperature sensor and the bottom end surface of the plate bracket; the second end of the temperature sensor is connected with a thermocouple, and the thermistor is arranged on the thermocouple.
Further, the mounting groove is arranged on the temperature sensor, a limiting rod is arranged in the mounting groove, and the spring is sleeved on the limiting rod.
Further, the number of the springs is two, and the two springs are arranged in the two mounting grooves in parallel.
Further, the thermocouple is provided with a cold end and a hot end, the cold end is in overlapped contact connection with the end part of the temperature sensor, the top end of the hot end is provided with a temperature measuring metal contact, and the temperature measuring metal contact is made of gold-like materials.
Further, the temperature measuring metal contact is a semicircle.
Further, a thermoelectric protection cover is arranged outside the thermocouple.
Further, the ultraviolet light testing module comprises a light source, a photosensitive sensor and a testing probe; the photosensitive sensor is fixedly arranged in a space formed between the flat bracket and the square connecting plate, the test probe is vertically connected to the photosensitive sensor, and the square connecting plate is provided with a pinhole for the test probe to pass through; the test probe is used for transmitting the received gemstone luminous characteristic data to the photosensitive sensor, and the photosensitive sensor can transmit the acquired colorless gemstone luminous characteristic data to the data processing module; the light source is used for exciting ultraviolet radiation, is fixed on the lower end face of the square connecting plate, and comprises a short wave ultraviolet excitation light source and a long wave ultraviolet excitation light source.
Further, the light source comprises a first short wave ultraviolet excitation light source, a second short wave ultraviolet excitation light source, a first long wave ultraviolet excitation light source and a second long wave ultraviolet excitation light source; the first short wave ultraviolet excitation light source, the first long wave ultraviolet excitation light source, the second short wave ultraviolet excitation light source and the second long wave ultraviolet excitation light source are arranged continuously at four corners of a square in a clockwise or anticlockwise arrangement mode; the pinhole is located in the center of the square.
Further, the short wave ultraviolet excitation light source is an ultraviolet light source with an excitation wavelength of 255nm plus or minus 2nm and is used for exciting the luminous characteristics of the precious stone sample in the wave band of 255nm plus or minus 2nm so as to distinguish natural diamond from laboratory cultured diamond; the long-wave ultraviolet excitation light source is an ultraviolet light source with the excitation wavelength of 365nm plus or minus 2nm and is used for exciting the luminous characteristics of the precious stone sample in the wave band of 365nm plus or minus 2nm so as to distinguish natural diamond from synthetic silicon carbide.
Further, the test device also comprises a support protection cover, wherein the first end of the support protection cover is detachably arranged at the first end of the handle shell and can be covered outside the test module; the second end of the supporting protection cover is provided with a supporting surface which is a plane, so that the hand-held colorless precious stone measuring device can be vertically placed on the horizontal operation table top.
Further, the portable colorless gemstone measuring device also comprises a power supply configured to provide power for operation of the portable colorless gemstone measuring device; the power supply adopts a rechargeable battery which is arranged in the second cavity; the second end of handle shell is equipped with the mouth that charges, and the mouth that charges is connected with rechargeable battery, charges to rechargeable battery through the mouth that charges.
Further, a power switch and a test button are arranged on the handle shell, the power switch is connected with a power supply, the test button is connected with the test module, and the power switch, the test button and the display screen are located on the same side face of the handle shell.
On the other hand, a colorless gemstone measuring method is provided, and the hand-held colorless gemstone measuring device is used for conducting a thermal conductivity test and an ultraviolet optical test on a colorless gemstone sample to be measured, wherein the thermal conductivity test is used for distinguishing the colorless gemstone with low thermal conductivity from the colorless gemstone with high thermal conductivity;
wherein, when ultraviolet optical test is carried out, the method comprises long-wave ultraviolet optical test and short-wave ultraviolet optical test; the long-wave ultraviolet optical test is used for distinguishing the colorless precious stone with strong absorption of the long-wave ultraviolet light and the colorless precious stone with weak absorption of the long-wave ultraviolet light; the short-wave ultraviolet optical test is used for distinguishing the colorless precious stone with strong absorption of the short-wave ultraviolet light and the colorless precious stone with weak absorption of the short-wave ultraviolet light.
Further, the performing a thermal conductivity test step includes: performing thermal conductivity test on the colorless precious stone by using a thermal conductivity test module to obtain thermal conductivity data, and transmitting the thermal conductivity data to a processing module; the processing module compares the received thermal conductivity data with a preset thermal conductivity threshold value; when the thermal conductivity data is lower than a preset thermal conductivity threshold, the test result is a colorless gemstone with low thermal conductivity, and when the thermal conductivity data is higher than the thermal conductivity threshold, the test result is a colorless gemstone with high thermal conductivity;
the test results of the thermal conductivity are displayed on a display screen, and meanwhile, the display prompts to continue the ultraviolet optical test.
Further, when the long-wave ultraviolet light test is carried out, the first long-wave ultraviolet excitation light source and the second long-wave ultraviolet excitation light source are controlled to emit long-wave ultraviolet light with the wavelength of 365nm plus or minus 2nm, the emitted long-wave ultraviolet light is aligned to the upper waist facet of the colorless gemstone sample to be tested, and the test probe emits received gemstone luminescence characteristic data w 1 Transmitting to a photosensitive sensor, wherein the photosensitive sensor can emit the acquired colorless gemstone luminous characteristic data w 1 Transmitting to a data processing module;
the processing module is based on the received light emission characteristic data w 1 Comparing the first light-emitting characteristic threshold value with a preset first light-emitting characteristic threshold value; when the light emitting characteristic data w 1 The test result is that the long-wave ultraviolet light is weakly absorbed and colorless precious stone, and the precious stone is used as the luminous characteristic data w 1 When the light intensity is lower than the first light-emitting characteristic threshold value, the test result is that the long-wave ultraviolet light is strongly absorbed by the colorless precious stone;
the test result of the long-wave ultraviolet light test is displayed on a display screen;
when the short-wave ultraviolet optical test is carried out, the first long-wave ultraviolet excitation light source and the second long-wave ultraviolet excitation light source are closed, the first short-wave ultraviolet excitation light source and the second short-wave ultraviolet excitation light source are controlled to emit short-wave ultraviolet light with the wavelength of 255nm plus or minus 2nm, the emitted short-wave ultraviolet light is aligned to the upper waist facet of the colorless gemstone sample to be tested, and the test probe emits received gemstone luminous characteristic data w 2 Transmitting to a photosensitive sensor, wherein the photosensitive sensor can emit the acquired colorless gemstone luminous characteristic data w 2 Transmitting to a data processing module;
the processing module is based on the received light emission characteristic data w 2 And a preset second light emission characteristic thresholdPerforming row comparison; when the light emitting characteristic data w 2 Is larger than a preset second luminous characteristic threshold value, the test result is that the short-wave ultraviolet light is weakly absorbed by the colorless precious stone, and when the luminous characteristic data w 2 When the light intensity is lower than the second light-emitting characteristic threshold, the test result is that the short-wave ultraviolet light is strongly absorbed by the colorless precious stone;
The test results of the short-wave ultraviolet optical test are displayed on a display screen.
Compared with the prior art, the invention has at least one of the following beneficial effects:
a) According to the handheld colorless precious stone measuring device provided by the invention, the thermal conductivity testing module and the ultraviolet light testing module are embedded in the small space in the handle shell by adopting the structural connecting piece, so that the measuring device is compact in structure, small in size, good in portability and convenient to operate; moreover, the measuring device has the combined test function of thermal conductivity test and ultraviolet light test, so that the situation that misjudgment and missed judgment can occur due to the adoption of a single certain identification device is effectively avoided, the test of all kinds of colorless precious stones can be realized, and the test result is more accurate and more reliable compared with that of portable precious stone detection equipment.
b) According to the handheld colorless gemstone measuring device provided by the invention, the thermal conductivity testing module adopts the compression spring type heat measurement, and the compression spring can provide the reverse thrust, so that the testing end of the thermal conductivity testing module is fully contacted and attached with the surface of the gemstone sample to be measured, the thermal conductivity testing effect and the testing accuracy are ensured, the extrusion contact force between the testing end and the gemstone sample to be measured is limited, and the service life of parts is ensured.
c) The light source of the ultraviolet optical testing module comprises a short wave ultraviolet excitation light source and a long wave ultraviolet excitation light source which are respectively used for exciting short wave ultraviolet radiation and long wave ultraviolet radiation, and natural diamond, laboratory cultured diamond and synthetic silicon carbide can be distinguished conveniently and rapidly.
d) The hand-held colorless gemstone measuring method provided by the invention can rapidly and accurately identify the synthesized cubic zirconia, the synthesized colorless corundum, the synthesized colorless spinel, the colorless crystal, the synthesized carbon silica, the laboratory cultured diamond and the natural diamond on the gemstone trade site, and has accurate measuring result and good reliability.
Drawings
In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present description, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic diagram of a portable colorless gemstone measuring device according to the present invention;
FIG. 2 is a schematic diagram of a handheld colorless gemstone measuring device according to the present invention;
FIG. 3 is an exploded view of a handheld colorless gemstone measuring device according to the present invention;
FIG. 4 is a schematic diagram of the internal functional components of the handheld colorless gemstone measuring device provided by the present invention;
FIG. 5 is a schematic view of a first view structure of a test module according to the present invention;
FIG. 6 is a schematic diagram of a thermal conductivity testing module according to the present invention;
FIG. 7 is a schematic diagram of a second view angle structure of the test module according to the present invention;
FIG. 8 is a schematic view of a third view structure of the test module according to the present invention;
FIG. 9 is a schematic view of a thermocouple housing provided by the present invention with a thermoelectric protection cap;
FIG. 10 is a schematic diagram of a test probe provided by the present invention disposed on a flat panel rack;
FIG. 11 is a schematic view of a transparent cover according to the present invention;
FIG. 12 is a schematic view of a light path of a light source illuminating a colorless gemstone to be measured according to the present invention;
fig. 13 is a schematic diagram of an operation flow of the colorless gemstone measurement method provided by the present invention.
Reference numerals:
1-a handle housing; 11-supporting a protective cover; 12-a charging port; 13-a power switch; 14-a test button; 15-a transparent cover; 2-a thermal conductivity test module; 21-a thermocouple; 211-cold end; 212-hot end; 212 a-a temperature measuring metal contact; 22-thermistor; 23-a temperature sensor; 231-mounting slots; 24-spring; 25-a thermoelectric protection cover; 3-ultraviolet optical test module; 31-short wave ultraviolet excitation light source I; 32-a second short wave ultraviolet excitation light source; 33-a first long-wave ultraviolet excitation light source; 34-a second long-wave ultraviolet excitation light source; 35-a photosensitive sensor; 36-test probes; 4-a processing module; 5-a display screen; 6-structural connectors; 61-a flat plate rack; 62-risers; 63-square connecting plates; 7-a power supply; 8-a colorless gemstone sample to be measured; 81-upper girdle facet; 82-a mesa; 83-pavilion.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
For the purpose of facilitating an understanding of the embodiments of the present application, reference will now be made to the following description of specific embodiments, taken in conjunction with the accompanying drawings, in which the embodiments are not intended to limit the embodiments of the present application.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "coupled" should be interpreted broadly, for example, as being fixedly coupled, as being detachably coupled, as being integrally coupled, as being mechanically coupled, as being electrically coupled, as being directly coupled, as being indirectly coupled via an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The terms "top," "bottom," "above … …," "below," and "on … …" are used throughout the description to refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are versatile, irrespective of their orientation in space.
Example 1
In one embodiment of the present invention, as shown in fig. 1 to 11, a hand-held colorless gemstone measuring device is disclosed, comprising:
the handle comprises a handle shell 1 for an operator to hold, wherein a first cavity and a second cavity are arranged in the handle shell 1 along the length direction of the handle shell 1, the first cavity is positioned at the first end of the handle shell 1, an opening is formed in the first end of the handle shell 1, and the opening is communicated with the first cavity;
the testing module is arranged in the first cavity, and the testing end of the testing module extends out of the opening to be used for measuring the colorless precious stone sample 8 to be tested;
the processing module 4 is arranged in the second cavity, the processing module 4 is connected with the testing module and is configured to control the operation of the testing module, receive the measurement data and process the received measurement data to obtain a measurement result, and transmit the measurement result to the display screen 5;
The display screen 5 is arranged on the surface of the handle shell 1, and the display screen 5 is connected with the processing module 4 and is configured to display the guiding of the test process and display the test result;
the test module is provided with a thermal conductivity test module 2 and an ultraviolet optical test module 3, so that the test module is provided with a thermal conductivity test mode and an ultraviolet optical test mode;
in a thermal conductivity test mode, the distinction between the colorless precious stone with low thermal conductivity and the colorless precious stone with high thermal conductivity is realized by measuring the thermal conductivity of the colorless precious stone sample 8 to be measured;
in the ultraviolet optical test mode, the distinction between the colorless precious stone with strong ultraviolet light absorption and the colorless precious stone with weak ultraviolet light absorption is realized by measuring the absorbance characteristic of the colorless precious stone sample 8 to be measured in a specific target ultraviolet band.
Existing portable gemstone authentication devices generally achieve only a single test function, one of which is the difficulty in integrating thermal conductivity and ultraviolet light test features in a small space. In this embodiment, the test module further comprises a structural connector 6, and the thermal conductivity test module 2 and the ultraviolet light test module 3 are connected to the structural connector 6. The thermal conductivity test module 2 and the ultraviolet optical test module 3 are embedded in a small space range by adopting the structural connecting piece 6, so that the combined test function of the thermal conductivity test and the ultraviolet optical test is realized, and the miniaturized design of the measuring device is realized.
Specifically, the structural connector 6 includes a flat bracket 61, a vertical plate 62 and a square connecting plate 63, the position of the flat bracket 61 in the handle housing 1 can divide the interior of the handle housing 1 into two cavities, the upper space of the flat bracket 61 is a second cavity, and the lower space is a first cavity; a vertical plate 62 is arranged on one side of the lower end surface of the flat plate support 61, the vertical plate 62 is vertical to the flat plate support 61, and the thermal conductivity testing module 2 is arranged on the vertical plate 62 and is positioned on the first side of the vertical plate 62; the other side below the flat plate bracket 61 is also provided with a square connecting plate 63, and the ultraviolet light test module 3 is arranged on the square connecting plate 63 and is positioned on the second side of the vertical plate 62; the square connecting plate 63 is fixedly connected with the lower end surface of the flat plate bracket 61 through four connecting rods, and the square connecting plate 63 is parallel to the lower surface of the flat plate bracket.
The existing thermal conductivity meter adopts a limiting piston type heat meter, because the thermal conductivity test is required to be fully contacted with a precious stone sample to be tested, certain force extrusion is required, and because precious stone ornaments basically are cut and formed crystals, and the volume is small, sometimes heat transfer is insufficient due to insufficient contact area or insufficient contact angle, so that the measuring effect is poor, and the force control is changed and error each time, once a certain force is overlarge, the limiting device is possibly deformed, and thus parts are damaged. Based on this, the thermal conductivity testing module 2 of the present embodiment adopts a compression spring type for heat measurement. Specifically, a guide groove is arranged on the side surface of the vertical plate 62, and the thermal conductivity testing module 2 is movably arranged in the guide groove and can linearly reciprocate along the guide groove; the thermal conductivity testing module 2 is provided with a mounting groove 231, a spring 24 is mounted in the mounting groove 231, one end of the spring 24 is abutted against the groove wall of the mounting groove 231, and the other end is abutted against the lower end face of the flat plate bracket 61; when the test end of the thermal conductivity test module 2 is pressed down to make contact with the surface of the colorless precious stone sample 8 to be tested, the test end of the thermal conductivity test module 2 can move towards the direction of the flat support 61, and at this time, the spring 24 is compressed to provide an elastic force which extends outwards to the test end of the thermal conductivity test module 2. By adopting the pressure spring type temperature measurement mode, the reverse thrust can be provided through the compression spring 24, so that the test end of the thermal conductivity test module 2 is fully contacted and attached with the surface of the precious stone sample to be tested, the thermal conductivity test effect and the test accuracy are ensured, the extrusion contact force between the test end and the precious stone sample to be tested is limited, and the service life of spare and accessory parts is ensured.
In one alternative embodiment, the testing end of the thermal conductivity testing module 2 is slightly longer than the testing end of the ultraviolet light testing module 3 by 2-5mm, so that the operator can conveniently operate and observe.
In the present embodiment, the thermal conductivity test module 2 includes a thermocouple 21, a thermistor 22, and a temperature sensor 23; the temperature sensor 23 can realize temperature data receiving, temperature data processing and temperature control, and can also transmit temperature data to the processing module; the flat plate bracket 61 is provided with a through hole communicated with the guide groove, two ends of the temperature sensor 23 are positioned at two sides of the through hole, a first end of the temperature sensor is positioned above the through hole, and the size of the first end of the temperature sensor 23 is larger than that of the through hole of the flat plate bracket 61; the spring 24 is connected between the temperature sensor 23 and the bottom end surface of the plate bracket 61; the second end of the temperature sensor 23 is connected to the thermocouple 21, and the thermistor 22 is provided on the thermocouple 21. Illustratively, the through hole on the flat bracket 61 is a rectangular hole, the temperature sensor 23 is a plate-shaped structure, and the width of the through hole on the flat bracket 61 is larger than the thickness of the temperature sensor 23 and smaller than the inner diameter of the spring 24. The temperature sensor 23 having a plate-like structure is parallel to the riser 62, which occupies a small space and can reduce the size of the policy device. After the temperature sensor 23 is mounted in the through hole of the flat bracket 61 and the guide groove of the vertical plate 62, the mounting groove 231 is positioned below the through hole, so that one end of the spring 24 is abutted against the lower end surface of the flat bracket 61, and the other end is abutted against the groove wall of the mounting groove 231; when the device is being tested, the temperature sensor 23 will contract inwardly along the channel and the spring 24 will compress.
In one alternative embodiment, the mounting groove 231 is formed on the temperature sensor 23, a limiting rod is arranged in the mounting groove 231, and the spring 24 is sleeved on the limiting rod, so that the spring can be ensured to be compressed along the axial direction of the spring. Further, the number of the springs 24 is two, the number of the mounting grooves 231 is two, the springs 24 are arranged in parallel, and the springs 24 are arranged in parallel in the two mounting grooves 231. Two springs 24 are installed, the resetting performance is better, and the loop is more stable.
In this embodiment, the thermocouple 21 has a cold end 211 and a hot end 212, the cold end 211 is in contact with the end of the temperature sensor 23, and the top end of the hot end 212 is provided with a temperature measuring metal contact 212a. The thermistor 22 is mutually attached to the thermocouple 21, the thermistor 22 is used for heating and controlling the temperature of the hot end 212, and the thermistor 22 is connected with the temperature sensor 23 through a lead wire; the temperature measuring metal contact 212a is connected with the temperature sensor 23 through a wire for transmitting temperature measuring data to the temperature sensor 23.
In an alternative embodiment, the spring may be directly connected between the hot end 212 and the cold end 211, so that the hot end 212 may expand and contract when pressed down, and the distance that the hot end contracts may be limited due to the spring.
The temperature measuring contact material of the traditional thermal conductivity meter adopts a red copper material or a brass material, is easy to oxidize at high temperature, and reduces the heat transfer efficiency, so that an error result is measured. Based on this, in this embodiment, the temperature measuring metal contact 212a is made of gold material, which can effectively prevent oxidation and ensure the reliability of the test result.
The temperature measuring contact of the conventional thermal conductivity meter generally adopts a pointed, prismatic or cylindrical structure, and the corners of the contact of the structure are edges, and as the precious stone is made of multi-faceted cutting and grinding materials, the contact cannot be well attached to the temperature measuring contact, so that the contact areas are different when different angles are contacted, and the test result is affected. Based on this, the thermometric metallic contact 212a in the present embodiment is a hemisphere. Through setting the temperature measurement metal contact 212a to hemispherical structure, can make the surface homoenergetic of the colourless precious stone sample 8 that awaits measuring under different angles keep stable area's contact with temperature measurement metal contact 212a, uniformity and homogeneity when guaranteeing the temperature transmission in the thermal conductivity test, and then guarantee thermal conductivity test accuracy.
In an alternative embodiment, the thermoelectric protection cover 25 is arranged outside the thermocouple 21, the thermoelectric protection cover 25 is in a horn shape, the thermocouple 21 is coaxially arranged in the thermoelectric protection cover 25, only the temperature measuring metal contact 212a is exposed, the arrangement can reduce the surface area of the thermocouple 21 directly exposed to air, and meanwhile, the thermoelectric protection cover has a heat insulation effect, so that accidents such as scalding and the like can be effectively avoided.
In this embodiment, the ultraviolet light testing module 3 is configured to measure the absorbance characteristics of the colorless gemstone sample 8 to be tested in a specific target ultraviolet band. The ultraviolet optical test module 3 comprises a light source, a photosensitive sensor 35 and a test probe 36; the photosensitive sensor 35 is fixedly arranged in a space formed between the flat bracket 61 and the square connecting plate 63, the test probe 36 is vertically connected to the photosensitive sensor 35, and the square connecting plate 63 is provided with a penetrating pinhole for the test probe 36 to penetrate; the test probe 36 is used for transmitting the received gemstone luminous characteristic data to the photosensitive sensor 35, and the photosensitive sensor 35 can transmit the acquired colorless gemstone luminous characteristic data to the data processing module 4; the light source is used for exciting ultraviolet radiation, and is fixed on the lower end face of the square connecting plate 63, and the light source comprises a short wave ultraviolet excitation light source and a long wave ultraviolet excitation light source.
In this embodiment, the light source includes two ultraviolet light source groups with different wavelengths, including a short-wave ultraviolet excitation light source and a long-wave ultraviolet excitation light source, which are respectively used for exciting short-wave ultraviolet radiation and long-wave ultraviolet radiation, and each ultraviolet light source group includes two ultraviolet light sources. Specifically, the light sources comprise a first short wave ultraviolet excitation light source 31, a second short wave ultraviolet excitation light source 32, a first long wave ultraviolet excitation light source 33 and a second long wave ultraviolet excitation light source 34; the first short wave ultraviolet excitation light source 31, the first long wave ultraviolet excitation light source 33, the second short wave ultraviolet excitation light source 32 and the second long wave ultraviolet excitation light source 34 are continuously arranged at four corners of a square in a clockwise or anticlockwise arrangement mode; the pinhole is located in the center of the square. It is also understood that the four ultraviolet light sources are uniformly and equidistantly arranged in a cross shape, the planes of the four ultraviolet light sources are perpendicular to the test probe 36, the light sources of the same type are diagonally arranged, the first short-wave ultraviolet excitation light source 31 and the second short-wave ultraviolet excitation light source 32 are diagonally arranged in equal intervals, the first long-wave ultraviolet excitation light source 33 and the second long-wave ultraviolet excitation light source 34 are diagonally arranged in equal intervals, and the four ultraviolet light sources are diagonally arranged in equal intervals. The arrangement enables the central radiation of the excitation light source to be incident on the upper waist facet 81 of the colorless gemstone sample 8 to be measured, and the incident radiation can be emitted from the table 82 to the greatest extent after being subjected to total internal reflection by utilizing the principle of total internal reflection formed by the diamond-type facet cutting or the round facet cutting, and the test probe 36 receives the optical signal, so that the optical loss is reduced to the greatest extent.
Specifically, the short wave ultraviolet excitation light source is an ultraviolet light source with an excitation wavelength of 255nm + -2 nm, and is used for exciting the luminous characteristics of the precious stone sample in the wavelength band of 255nm + -2 nm so as to distinguish natural diamond from laboratory-grown diamond, wherein the laboratory-grown diamond comprises CVD-grown diamond and HPHT-grown diamond. The existing technology for distinguishing natural diamonds from laboratory diamonds by adopting 254nm short wave ultraviolet is mainly applied to large-scale instruments and equipment, and the existing portable miniaturized equipment does not have the function yet. The long-wave ultraviolet excitation light source is an ultraviolet light source with the excitation wavelength of 365nm plus or minus 2nm and is used for exciting the luminous characteristics of the precious stone sample in the wave band of 365nm plus or minus 2nm so as to distinguish natural diamond from synthetic silicon carbide.
In this embodiment, the handheld colorless precious stone measuring device further includes a supporting protection cover 11, wherein a first end of the supporting protection cover 11 is detachably mounted at a first end of the handle housing 1, and can be covered outside the test module to protect the temperature measuring metal contact 212a and the test probe 36 of the test module; the second end of the supporting protection cover 11 is provided with a supporting surface which is a plane, so that the hand-held colorless gemstone measuring device can be vertically placed on the horizontal operating table.
Further, the handle shell 1 is formed by buckling an upper shell and a lower shell, the first end of the handle shell 1 is further provided with a transparent cover 15, the transparent cover 15 can be covered outside the test module and located inside the support protection cover 11, meanwhile, the transparent cover 15 can be fixed on the handle shell 1 in a buckling mode, a certain fixing effect is achieved on the shells of the two buckles, and the handle shell is attractive. The transparent cover 15 is provided with a first detection hole and a second detection hole, the first detection hole is used for the test probe 36 to extend out, and the second detection hole is used for the temperature measuring metal contact 212a at the top end of the thermocouple 21 to extend out.
In this embodiment, the handheld colorless gemstone measuring device further includes a power supply 7, the power supply 7 being configured to provide power for operation of the handheld colorless gemstone measuring device; the power supply 7 adopts a rechargeable battery which is arranged in the second cavity; the second end of the handle housing 1 is provided with a charging port 12, the charging port 12 is connected with a rechargeable battery, and the rechargeable battery is charged through the charging port 12.
In the embodiment, a power switch 13 and a test button 14 are arranged on the handle shell 1, the power switch 13 is connected with the power supply 7, the test button 14 is connected with the test module, and the power switch 13, the test button 14 and the display screen 5 are positioned on the same side face of the handle shell 1; the arrangement can realize single-hand control, and is convenient and quick.
The present embodiment also provides a method for measuring a colorless gemstone, where the hand-held colorless gemstone measuring device of the present embodiment is used to measure a colorless gemstone to be measured, where the colorless gemstone sample 8 to be measured includes a colorless gemstone such as a natural diamond, a CVD-grown diamond, an HPHT-grown diamond, a synthetic carbon silica, a synthetic cubic zirconia, a synthetic colorless corundum, a synthetic colorless spinel, and a colorless crystal, and the colorless gemstone sample 8 to be measured may be a non-inlaid gemstone or a finished stone that has been inlaid.
Referring to fig. 13, a flowchart of the operation of the colorless gemstone measurement method, the measurement method includes the steps of: respectively performing a thermal conductivity test and an ultraviolet light test; ultraviolet optical tests include long-wave ultraviolet optical tests and short-wave ultraviolet optical tests.
Wherein the thermal conductivity test is used to distinguish between low thermal conductivity colorless precious stones and high thermal conductivity colorless precious stones; exemplary low thermal conductivity colorless precious stones include synthetic cubic zirconia, synthetic colorless corundum, synthetic colorless spinel, and colorless crystals; colorless gemstones of high thermal conductivity include natural diamond, CVD grown diamond, HPHT grown diamond, and synthetic carbon silica.
The long-wave ultraviolet optical test is used for distinguishing the colorless precious stone with strong absorption of the long-wave ultraviolet light and the colorless precious stone with weak absorption of the long-wave ultraviolet light; illustratively, the long-wave ultraviolet light-strongly absorbing colorless precious stones include synthetic carbon silica, and the long-wave ultraviolet light-weakly absorbing colorless precious stones include natural diamonds and laboratory grown diamonds.
The short-wave ultraviolet optical test is used for distinguishing the colorless precious stone with strong absorption of the short-wave ultraviolet light and the colorless precious stone with weak absorption of the short-wave ultraviolet light. Illustratively, the short-wavelength ultraviolet light strongly absorbing colorless gemstone is a natural diamond and the short-wavelength ultraviolet light weakly absorbing colorless gemstone is a laboratory grown diamond.
The measuring method of the embodiment realizes the distinction of the colorless precious stone with low heat conductivity and the colorless precious stone with high heat conductivity by performing the heat conductivity test, and can rapidly and effectively distinguish the synthetic carbon silica, the laboratory cultured diamond and the natural diamond by combining the long-wave ultraviolet optical test and the short-wave ultraviolet optical test, thereby having convenient operation and high result accuracy.
In this embodiment, the step of performing the thermal conductivity test includes: performing thermal conductivity test on the colorless precious stone by using a thermal conductivity test module 2 to obtain thermal conductivity data, and transmitting the thermal conductivity data to a processing module 4; the processing module 4 compares the received thermal conductivity data with a preset thermal conductivity threshold; when the thermal conductivity data is lower than a preset thermal conductivity threshold, the test result is a colorless gemstone with low thermal conductivity, and when the thermal conductivity data is higher than the thermal conductivity threshold, the test result is a colorless gemstone with high thermal conductivity; the test results of the thermal conductivity are displayed on the display screen 5, and at the same time, the display prompts to continue the ultraviolet optical test.
Specifically, the detailed procedure for thermal conductivity testing is: the test end of the thermal conductivity test module is in extrusion contact with the surface of the to-be-tested precious stone, and the temperature measurement metal contact 212a of the thermocouple hot end 212 is fully and tightly contacted with the surface of the to-be-tested colorless precious stone sample 8 under the action of the compressed spring 24, so that the temperature measurement metal contact 212a of the thermocouple hot end 212 of the thermocouple 21 transfers heat to the to-be-tested colorless precious stone sample 8. The processing module 4 controls the thermistor 22 to heat based on the temperature data monitored by the temperature sensor 23, so that the temperature measuring metal contact 212a of the thermocouple junction 212 reaches a specified temperature threshold and maintains a constant temperature through the thermistor 22. The temperature sensor 23 collects temperature data of the thermocouple 21 after heat loss of the temperature measuring metal contact 212a of the hot end 212 in unit time under the condition of fully compressing the spring 24, the temperature sensor 23 outputs the temperature data of the hot end 212 after temperature loss and the cold end 211 data through the temperature measuring metal contact 212a of the temperature sensor 23, and the processing module 4 calculates a difference value of the temperature data of the hot end 212 and the cold end 211 to obtain heat transfer data of the colorless precious stone sample 8 to be measured in unit time, wherein the heat transfer data is thermal conductivity in unit time. A comparison analysis is made with respect to the measured thermal conductivity with the thermal conductivity threshold set by the processing module 4, wherein the test results with thermal conductivity data below the threshold are low thermal conductivity colorless precious stones, which may mainly comprise: synthetic cubic zirconia, synthetic colorless corundum, synthetic colorless spinel and crystal, the display 5 will appear as "diamond-like"; test results where the thermal conductivity data is above the threshold are high thermal conductivity colorless precious stones, which may include: natural diamond, laboratory grown diamond CVD grown diamond or HPHT grown diamond and synthetic carbon silica, display screen 5 will appear as "ultraviolet light test".
In the existing ultraviolet optical testing method, an excitation light source is directly injected into the table top 82, and due to the principle of total internal reflection of the precious stone, the incident light source can cause a large amount of light loss in the precious stone crystal due to refraction and internal reflection, and finally, the received optical signal is insufficient, so that the testing effect is poor. In the ultraviolet optical test of this embodiment, the central radiation of the excitation light source can be directed at the upper waist facet 81 of the precious stone sample for incidence, and the incident radiation can be emitted from the table 82 to the greatest extent after being totally internally reflected by utilizing the total internal reflection principle formed by cutting the precious stone standard round-drilling type facet, and the test probe 36 receives the optical signal, so that the test effect is better.
When the long-wave ultraviolet light test is carried out, the first 33 and second 34 long-wave ultraviolet excitation light sources are controlled to emit the long-wave ultraviolet light with the wavelength of 365nm plus or minus 2nm, the emitted long-wave ultraviolet light is aligned to the upper waist facet 81 of the colorless gemstone sample 8 to be tested, and the test probe is used for testing36 to receive gemstone luminescence characteristic data w 1 To the photosensitive sensor 35, the photosensitive sensor 35 can emit the acquired colorless gemstone light characteristic data w 1 To the data processing module 4; the processing module 4 is based on the received light emission characteristic data w 1 Comparing the first light-emitting characteristic threshold value with a preset first light-emitting characteristic threshold value; when the light emitting characteristic data w 1 Is larger than a preset first luminous characteristic threshold value, the test result is that the long-wave ultraviolet light is weakly absorbed by the colorless precious stone, and when the luminous characteristic data w 1 When the light intensity is lower than the first light-emitting characteristic threshold value, the test result is that the long-wave ultraviolet light is strongly absorbed by the colorless precious stone; the test result of the long wave ultraviolet light test is displayed on the display 5.
When the short-wave ultraviolet optical test is carried out, the first long-wave ultraviolet excitation light source 33 and the second long-wave ultraviolet excitation light source 34 are closed, the first short-wave ultraviolet excitation light source 31 and the second short-wave ultraviolet excitation light source 32 are controlled to emit short-wave ultraviolet light of ultraviolet light sources with wavelengths of 255nm plus or minus 2nm, the emitted short-wave ultraviolet light is aligned to the upper waist facet 81 of the colorless gemstone sample 8 to be tested, and the test probe 36 is used for receiving the gemstone luminescence characteristic data w 2 To the photosensitive sensor 35, the photosensitive sensor 35 can emit the acquired colorless gemstone light characteristic data w 2 To the data processing module 4; the processing module 4 is based on the received light emission characteristic data w 2 Comparing with a preset second light-emitting characteristic threshold value; when the light emitting characteristic data w 2 The test result is that the short-wave ultraviolet light is weakly absorbed and colorless precious stone, and the short-wave ultraviolet light is used as the luminous characteristic data w 2 When the light intensity is lower than the second light-emitting characteristic threshold, the test result is that the short-wave ultraviolet light is strongly absorbed by the colorless precious stone; the test results of the short-wave ultraviolet optical test are displayed on the display 5.
The existing portable equipment is mainly used for distinguishing the synthesized carbon silica by adopting a conductivity meter, the synthesized carbon silica is an artificial synthetic crystal, and the novel synthesis mode cannot be distinguished by using a conductivity test method; moreover, the residual sweat caused by the finger touching on the surface of the precious stone crystal can affect the conductivity test due to the electrolyte and fiber hair contained in human sweat, so that the diamond (natural diamond, laboratory-cultured diamond) is misjudged as synthetic carbon silica, and therefore, the conductivity meter is not accurate enough to be applied. Based on the above problems, the present embodiment uses a long-wave ultraviolet light test to test and distinguish the synthetic carbon silica, and the test technique can effectively distinguish the synthetic carbon silica from the diamond (natural diamond, laboratory-grown diamond) by distinguishing the absorbance of the gemstone sample by the long-wave ultraviolet light. Specifically, in the ultraviolet optical test process, the processing module 4 is used for controlling the irradiation of the excitation ultraviolet light source to excite the luminous characteristics of the precious stone, so that the long-wave ultraviolet light source photoluminescence test and the short-wave ultraviolet light source photoluminescence test are performed.
The detailed process of the photoluminescence test of the long-wave ultraviolet light source is as follows: the processing module controls the long wave ultraviolet excitation light source to work, long wave ultraviolet light source radiation is aligned to the upper waist facet 81 of the colorless precious stone sample 8 to be measured, as shown in fig. 12, long wave ultraviolet light enters the pavilion 83 of the colorless precious stone sample 8 to be measured after entering through the upper waist facet 81 of the colorless precious stone sample 8 to be measured, and is emitted towards the table top 82 after being absorbed and reflected by the inside of the colorless precious stone sample 8 to be measured through the principle of total internal reflection, so that the test probe 36 which is currently propped against the middle position of the table top 82 of the colorless precious stone sample 8 to be measured receives the radiation after being partially absorbed. The colorless gemstone sample 8 to be measured is excited by the long-wave ultraviolet light source radiation in unit time and then is subjected to partial absorption and total internal reflection, wherein the luminous radiation characteristic is represented by luminous characteristic data w of the colorless gemstone sample 8 to be measured after being excited by the long-wave ultraviolet light source radiation 1 The full power luminous flux of the long wave ultraviolet light source radiation is h 1 The light loss of the long wave ultraviolet light source radiation which is absorbed by the part of the precious stone to be measured and totally internally reflected is dB 1 ，w 1 =h 1 -dB 1 . Receiving the gemstone's long wave ultraviolet light emission characteristic data w by the test probe 36 1 Transmitted to the photosensitive sensor 35, and the light emitting characteristic data w is fed back by the photosensitive sensor 35 1 To the processing module 4, the processing module 4 generates the light-emitting characteristic data w according to the measured light-emitting characteristic data w 1 And the set luminous characteristic data w 1 And comparing and analyzing the threshold value to obtain a detection result. Wherein, if the light emitting characteristic data w 1 The result of greater than the threshold is a colorless gemstone with weak absorption of long wave ultraviolet light, such as: natural diamond,Cultivating diamond in a laboratory, and performing photoluminescence test on the diamond by using a short-wave ultraviolet light source; if the luminous characteristic data w 1 The result of a threshold value being below is a strong absorption of long-wave ultraviolet light by colorless precious stones, such as: synthetic carbon silica, display screen 5 will show: synthesizing carbon silica.
The detailed process of the photoluminescence test of the short-wave ultraviolet light source is as follows: the processing module controls the long wave ultraviolet excitation light source to be turned off, controls the short wave ultraviolet excitation light source to work, and the short wave ultraviolet light source radiation is aligned to the upper waist facet 81 of the colorless precious stone sample 8 to be measured, enters the pavilion 83 of the colorless precious stone sample 8 to be measured after being incident through the upper waist facet 81 of the colorless precious stone sample 8 to be measured, and is emitted towards the table top 82 after being absorbed and reflected by the inside of the colorless precious stone sample 8 to be measured through the total internal reflection principle, so that the test probe 36 which is currently propped against the middle position of the table top 82 of the colorless precious stone sample 8 to be measured receives the radiation after being partially absorbed. The colorless gemstone sample 8 to be measured is excited by the radiation of the short wave ultraviolet light source in unit time and then is subjected to partial absorption and total internal reflection, wherein the luminous radiation characteristic is represented by luminous characteristic data w of the colorless gemstone sample 8 to be measured after being excited by the radiation of the long wave ultraviolet light source 2 The full power luminous flux of the short wave ultraviolet light source radiation is h 2 The light loss of short wave ultraviolet light source radiation which is absorbed by the part of the precious stone to be measured and totally internally reflected is dB 2 ，W 2 =h 2 -dB 2 . Receiving short wave ultraviolet luminescence characteristic data W of the gemstone by the test probe 36 2 Transmitted to the photosensitive sensor 35, and the light emitting characteristic data W is fed back by the photosensitive sensor 35 2 To the processing module 4, the processing module 4 generates the light-emitting characteristic data W according to the measured light-emitting characteristic data 2 And comparing and analyzing the set second luminous characteristic data threshold value to obtain a detection result. Wherein, if the light emitting characteristic data w 2 The result of the threshold value of the second luminescence characteristic data is that the short-wave ultraviolet light is strongly absorbed by the colorless precious stone, such as: the natural diamond, display 5 will appear as: natural diamond; if the luminous characteristic data w 2 The result of the threshold value of the second luminescence characteristic data is that the short wave ultraviolet light is weakly absorbed by the colorless precious stone, such as: laboratory-grown diamonds, including CVD laboratory-grown diamonds and HPHT laboratory-grown diamondsThe diamond, display 5 will appear as: the laboratory cultivates diamonds.
Compared with the prior art, the handheld colorless gemstone measuring device and the handheld colorless gemstone measuring method provided by the embodiment have at least one of the following beneficial effects:
1. the thermal conductivity testing module and the ultraviolet light testing module are embedded in a small space in the handle shell by adopting the structural connecting piece, so that the measuring device is compact in structure, small in size, good in portability and convenient to operate; moreover, the measuring device has the combined test function of thermal conductivity test and ultraviolet light test, so that misjudgment and missed judgment caused by adopting a single certain identification device can be effectively avoided, the test of all kinds of colorless precious stones can be realized, and non-embedded precious stones or embedded finished precious stones can be tested, and the test result is more accurate and reliable compared with the test result of portable precious stone detection equipment.
2. The thermal conductivity testing module adopts a compression spring to measure heat, and can provide reverse thrust through the compression spring, so that the testing end of the thermal conductivity testing module is fully contacted and attached with the surface of the precious stone sample to be tested, the thermal conductivity testing effect and the testing accuracy are ensured, the extrusion contact force between the testing end and the precious stone sample to be tested is limited, and the service life of spare and accessory parts is ensured.
3. Through setting the temperature measurement metal contact to hemispherical structure, can make the surface homoenergetic of the colourless precious stone sample that awaits measuring under different angles keep stable area's contact with the temperature measurement metal contact, uniformity and homogeneity when guaranteeing the temperature transmission in the thermal conductivity test, and then guarantee thermal conductivity test accuracy.
4. The light source of the ultraviolet optical test module comprises a short wave ultraviolet excitation light source and a long wave ultraviolet excitation light source which are respectively used for exciting short wave ultraviolet radiation and long wave ultraviolet radiation, and can conveniently and rapidly distinguish natural diamond, cultivated diamond and synthesized silicon carbide.
5. The planes of the four ultraviolet light sources are perpendicular to the test probe, the light sources of the same type are diagonally arranged, and the four ultraviolet light sources are equidistantly and diagonally arranged, so that the central radiation in the excitation light source can be aligned to the upper waist facet of the colorless precious stone sample to be tested, the uniformity of incident radiation entering the two sides of the upper waist facet of the precious stone is ensured, the incident radiation is emitted from the table surface of the precious stone after being partially absorbed by utilizing the principle of total internal reflection of the precious stone, and the radiation after being partially absorbed can be received by the test probe to the greatest extent.
6. The method can rapidly and accurately identify the synthetic cubic zirconia, the synthetic colorless corundum, the synthetic colorless spinel, the colorless crystal, the synthetic carbon silica, the laboratory cultured diamond and the natural diamond on the precious stone trading site, and has accurate measurement result and good reliability.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present application, and are not meant to limit the scope of the invention, but to limit the scope of the invention.
Claims (10)
1. A hand-held colorless gemstone measuring device, comprising:
the handle comprises a handle shell, a first cavity and a second cavity, wherein the handle shell is used for being held by an operator, the first cavity and the second cavity are arranged in the handle shell along the length direction of the handle shell, an opening is formed in the first end of the handle shell, and the opening is communicated with the first cavity;
the testing module is arranged in the first cavity, and a testing end of the testing module extends out of the opening to be used for measuring a colorless precious stone sample to be tested;
The processing module is installed in the second cavity, is connected with the testing module and is configured to control the operation of the testing module, receive measurement data and process the measurement data;
the display screen is arranged on the surface of the handle shell, is connected with the processing module and is configured to display the guiding of the testing process and display the testing result;
the test module is provided with a thermal conductivity test module and an ultraviolet optical test module, so that the test module is provided with a thermal conductivity test mode and an ultraviolet optical test mode;
in the thermal conductivity test mode, the distinction between the colorless precious stone with low thermal conductivity and the colorless precious stone with high thermal conductivity is realized by measuring the thermal conductivity of the colorless precious stone sample to be tested;
in the ultraviolet optical test mode, the distinction between the colorless precious stone with strong ultraviolet light absorption and the colorless precious stone with weak ultraviolet light absorption is realized by measuring the absorbance characteristic of the colorless precious stone sample to be measured in a specific target ultraviolet band;
the thermal conductivity testing module comprises a thermocouple, wherein the thermocouple is provided with a temperature measuring metal contact, and the temperature measuring metal contact is made of gold-like material;
the temperature measuring metal contact is a semicircle;
The thermoelectric protection cover is arranged outside the thermocouple, is in a horn mouth shape, and is coaxially arranged in the thermoelectric protection cover, so that only the temperature measuring metal contact is exposed;
the ultraviolet light testing module comprises a light source, a photosensitive sensor and a testing probe; the light source comprises four ultraviolet light sources, the planes of the four ultraviolet light sources are perpendicular to the test probe, the central radiation of the excitation light source can be aligned to the upper waist facet of the colorless precious stone sample to be tested and is incident, the incident radiation is emitted from the table surface after total internal reflection, and the test probe receives the optical signals.
2. The hand-held colorless gemstone measurement device of claim 1, wherein the test module further comprises a structural connector to which the thermal conductivity test module and the ultraviolet light test module are connected.
3. The hand-held colorless gemstone measurement device of claim 2 wherein the structural connector comprises a flat plate bracket, a riser and a square connecting plate, wherein the flat plate bracket has a second cavity in the upper space and a first cavity in the lower space; the lower end face of the flat plate bracket is provided with a vertical plate, and the thermal conductivity testing module is arranged on the vertical plate and is positioned on the first side of the vertical plate; a square connecting plate is arranged below the flat plate bracket, and the ultraviolet optical test module is arranged on the square connecting plate and is positioned on the second side of the vertical plate; the square connecting plate is fixedly connected with the lower end face of the flat plate bracket through four connecting rods, and the square connecting plate is parallel to the lower surface of the flat plate bracket.
4. The hand-held colorless gemstone measuring device according to claim 3, wherein the side of the riser is provided with a vertically arranged guide slot, and the thermal conductivity testing module is movably arranged in the guide slot and can linearly reciprocate along the guide slot;
the thermal conductivity testing module is provided with a mounting groove, a spring is mounted in the mounting groove, one end of the spring is abutted against the groove wall of the mounting groove, and the other end of the spring is abutted against the lower end face of the flat plate bracket;
when the testing end of the thermal conductivity testing module is pressed down to be in contact with the surface of the colorless precious stone sample to be tested, the testing end of the thermal conductivity testing module can move towards the direction of the flat plate support, and at the moment, the spring compression can provide elastic force which extends outwards for the testing end of the thermal conductivity testing module.
5. The hand-held colorless gemstone measurement device of claim 4, wherein the thermal conductivity test module further comprises a thermistor and a temperature sensor; the flat plate bracket is provided with a through hole communicated with the guide groove, the first end of the temperature sensor is positioned above the through hole, and the size of the first end of the temperature sensor is larger than that of the through hole; the spring is connected between the temperature sensor and the bottom end surface of the flat plate bracket; the second end of the temperature sensor is connected with a thermocouple, and the thermistor is arranged on the thermocouple.
6. The hand-held colorless gemstone measuring device of claim 5, wherein the thermocouple has a cold end and a hot end, the cold end being in overlying contact with the end of the temperature sensor, the thermometric metal contact being disposed on top of the hot end.
7. The hand-held colorless gemstone measuring device according to claim 3, wherein the photosensitive sensor is fixedly installed in a space formed between the flat bracket and the square connecting plate, the test probe is vertically connected to the photosensitive sensor, and the square connecting plate is provided with a pinhole through which the test probe passes; the test probe is used for transmitting the received gemstone luminous characteristic data to the photosensitive sensor, and the photosensitive sensor can transmit the acquired colorless gemstone luminous characteristic data to the data processing module; the light source is used for exciting ultraviolet radiation, the light source is fixed on the lower end face of the square connecting plate, and the light source comprises a short wave ultraviolet excitation light source and a long wave ultraviolet excitation light source.
8. The hand-held colorless gemstone measurement device of claim 7 wherein the light source comprises a first short wave ultraviolet excitation light source, a second short wave ultraviolet excitation light source, a first long wave ultraviolet excitation light source, and a second long wave ultraviolet excitation light source;
The first short wave ultraviolet excitation light source, the first long wave ultraviolet excitation light source, the second short wave ultraviolet excitation light source and the second long wave ultraviolet excitation light source are continuously arranged at four corners of a square in a clockwise or anticlockwise arrangement mode; the pinhole is located at the center of the square.
9. The hand-held colorless gemstone measurement device of claim 8 wherein the short wave ultraviolet excitation light source is an ultraviolet light source having an excitation wavelength of 255nm ± 2nm for exciting the luminescent characteristics of the gemstone sample at the wavelength band of 255nm ± 2nm to distinguish natural diamond from laboratory grown diamond;
the long-wave ultraviolet excitation light source is an ultraviolet light source with excitation wavelength of 365nm plus or minus 2nm and is used for exciting the luminous characteristics of the precious stone sample in the wave band of 365nm plus or minus 2nm so as to distinguish natural diamond from synthetic silicon carbide.
10. A colorless gemstone measurement method, characterized in that a thermal conductivity test and an ultraviolet optical test are performed on a colorless gemstone sample to be measured using the hand-held colorless gemstone measurement device according to any one of claims 1 to 9, the thermal conductivity test being used to distinguish between a colorless gemstone of low thermal conductivity and a colorless gemstone of high thermal conductivity;
wherein, when ultraviolet optical test is carried out, the method comprises long-wave ultraviolet optical test and short-wave ultraviolet optical test; the long-wave ultraviolet optical test is used for distinguishing the colorless precious stone with strong absorption of the long-wave ultraviolet light and the colorless precious stone with weak absorption of the long-wave ultraviolet light; the short-wave ultraviolet optical test is used for distinguishing the colorless precious stone with strong absorption of the short-wave ultraviolet light and the colorless precious stone with weak absorption of the short-wave ultraviolet light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311718162.4A CN117405616B (en) | 2023-12-14 | 2023-12-14 | Handheld colorless precious stone measuring device and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311718162.4A CN117405616B (en) | 2023-12-14 | 2023-12-14 | Handheld colorless precious stone measuring device and measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117405616A CN117405616A (en) | 2024-01-16 |
| CN117405616B true CN117405616B (en) | 2024-04-09 |
Family
ID=89496551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311718162.4A Active CN117405616B (en) | 2023-12-14 | 2023-12-14 | Handheld colorless precious stone measuring device and measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117405616B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525746A (en) * | 2015-09-09 | 2017-03-22 | 深圳迪凯工贸有限公司 | Jewel tester and jewel identifying method |
| CN112034000A (en) * | 2020-09-02 | 2020-12-04 | 温州市科丰仪器仪表有限公司 | Gem identification device and method based on thermal conductivity and surface resistivity |
| CN112492886A (en) * | 2017-12-19 | 2021-03-12 | 钻禧仪器(新加坡)有限公司 | Gem detection device |
| CN114144656A (en) * | 2019-06-19 | 2022-03-04 | 钻禧仪器(新加坡)有限公司 | Gem testing equipment |
| CN114813739A (en) * | 2022-04-22 | 2022-07-29 | 深圳迪凯工贸有限公司 | Multifunctional gem tester and gem identification method |
| CN117007638A (en) * | 2023-07-10 | 2023-11-07 | 温州市科丰仪器仪表有限公司 | Precious stone identification device, precious stone identification method and application |
-
2023
- 2023-12-14 CN CN202311718162.4A patent/CN117405616B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525746A (en) * | 2015-09-09 | 2017-03-22 | 深圳迪凯工贸有限公司 | Jewel tester and jewel identifying method |
| CN112492886A (en) * | 2017-12-19 | 2021-03-12 | 钻禧仪器(新加坡)有限公司 | Gem detection device |
| CN114144656A (en) * | 2019-06-19 | 2022-03-04 | 钻禧仪器(新加坡)有限公司 | Gem testing equipment |
| CN112034000A (en) * | 2020-09-02 | 2020-12-04 | 温州市科丰仪器仪表有限公司 | Gem identification device and method based on thermal conductivity and surface resistivity |
| CN114813739A (en) * | 2022-04-22 | 2022-07-29 | 深圳迪凯工贸有限公司 | Multifunctional gem tester and gem identification method |
| CN117007638A (en) * | 2023-07-10 | 2023-11-07 | 温州市科丰仪器仪表有限公司 | Precious stone identification device, precious stone identification method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117405616A (en) | 2024-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11073482B2 (en) | Multi-functional precious stone testing apparatus and method thereof | |
| CN110402385A (en) | Device and method for screening jewel | |
| US11668654B2 (en) | Gemstone testing apparatus | |
| US10054550B2 (en) | Spectroscopic determination of optical properties of gemstones | |
| EP1394531A1 (en) | Handy internal quality inspection instrument | |
| US10203288B2 (en) | Multi-functional precious stone testing apparatus and method thereof | |
| US10859559B1 (en) | Gemstone testing apparatus | |
| US9176068B1 (en) | Utility electronic precious gemstone type and quality detector | |
| US20100027002A1 (en) | High-speed, rugged, time-resolved, raman spectrometer for sensing multiple components of a sample and for diagnostics of pathological skin conditions such as cancer | |
| CN109964111B (en) | Apparatus for authenticating diamonds | |
| JP2005312927A (en) | Surface property simultaneous measuring probe, and surface property simultaneous measuring method and device using same | |
| CN106053425A (en) | Raman spectrum gem and jade appraising device and method | |
| TW567310B (en) | Instrument for examining a gemstone | |
| US10837915B2 (en) | Gemstone testing apparatus | |
| CN106525746A (en) | Jewel tester and jewel identifying method | |
| CN117405616B (en) | Handheld colorless precious stone measuring device and measuring method | |
| RU2679928C1 (en) | Device for identification of diamond | |
| US20240027335A1 (en) | Gemstone multi-tester instrument with removable probe | |
| US20240027358A1 (en) | Diamond and colorless gemstone multi-tester | |
| WO2024018278A1 (en) | Gemstone multi-tester instrument with removable probe | |
| RU2765213C1 (en) | Device for diagnostic stones in jewelry | |
| CN214668643U (en) | Identification device for distinguishing natural diamond, synthetic diamond and morusite based on reflection method | |
| JPH04138340A (en) | Infrared spectrum measuring head and measuring apparatus | |
| CN113008893A (en) | Identification device for distinguishing natural diamond, synthetic diamond and morusite based on reflection method | |
| O’Donoghue | Recent developments in gem testing |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |