A method and apparatus for detecting the purity of gold

Abstract

This invention discloses a method for detecting the purity of gold, comprising the following steps: creating a detection platform and placing the gold to be tested on the platform; acquiring image information of the gold to be tested; capturing several "impurity units" on the surface of the gold to be tested in the image and locating the "impurity units"; moving the gold to be tested according to the location of the "impurity units" so that the spectrometer can perform multi-point purity measurements on the "impurity units" and calculate the purity of the gold to be tested. Through the above method, during detection, the gold to be tested is placed on the detection platform, 3D image information of the gold to be tested is acquired by a camera, and all "impurity units" in the image information are captured to obtain the position coordinates of each "impurity unit". Based on the coordinates, the gold to be tested is moved so that each "impurity unit" is positioned below the detection end of the spectrometer, thereby enabling the spectrometer to perform precise multi-point measurements on each "impurity unit" and improving the accuracy of gold purity detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gold purity detection, in particular to a method and device for detecting gold purity. BACKGROUND

[0002] Gold, as a kind of noble metal, has good physical properties, such as high density, softness, pure texture, beautiful color, good ductility and forgeability. Because of the high value of gold and the small total loss of gold in the recycling process, the recycled gold has a very high recycling value.

[0003] The current industry gold recycling process mainly includes sample weighing initial inspection, purity initial inspection, smelting, reweighing, and purity reinspection. There are various ways to detect gold purity, mainly chemical analysis and physical analysis. The chemical analysis method has a long history and high analysis accuracy, but it needs to destroy the sample and takes a long time to analyze, and cannot be used for micro-area analysis, which is not suitable for commercial recycling of gold. The physical analysis method mainly uses a spectrometer to emit X-rays to the gold sample and observe the reflected ray wavelength and energy to determine the purity of the gold. This method can give very accurate results.

[0004] According to the national standard GB11887-89, gold jewelry with less than 9K cannot be called gold jewelry. Generally, there are impurity metals such as copper, tungsten, and zinc in the gold jewelry recycled by merchants in the market. After smelting, the impurities will be in the form of particles floating on the surface of the gold block, showing different luster and smoothness from the full gold.

[0005] The spectrum on the market can only test a single point of the above impurities, and cannot intelligently test multiple points of the impurity points. Therefore, when measuring the purity of gold, only a single impurity point is tested, and the test data of the impurity point is used instead of the data of other impurity points in the gold to be tested. However, in the actual process, different impurity points have different gold purity. This testing method will lead to large measurement deviation of gold purity when recycling gold jewelry, causing loss to merchants or service providers in the gold recycling transaction process. SUMMARY

[0006] To solve the technical problem of the above-mentioned "spectrum on the market can only test a single point, and cannot intelligently test multiple points of the impurity points".

[0007] The present application provides a method for detecting gold purity, comprising the following steps:

[0008] Creating a detection platform and placing the gold to be tested on the detection platform;

[0009] Collecting image information of the gold to be tested.

[0010] grabbing a plurality of "impurity units" on the surface of the gold under test in the image, and positioning the "impurity units" to obtain the positions of the "impurity units" on the detection platform;

[0011] According to the positioning of the "impurity units", moving the gold under test so that the spectrometer measures the purity of the "impurity units" at multiple points:

[0012] According to the purity measurement data of each "impurity unit", calculating the purity of the gold under test.

[0013] Further, the step of "creating a detection platform and placing the gold under test on the detection platform" includes:

[0014] Creating an initial coordinate system of the detection platform;

[0015] Initializing the coordinates of the spectrometer on the detection platform;

[0016] Placing the gold under test on the detection platform;

[0017] Weighing the gold under test to obtain the total mass "M" of the gold under test.

[0018] Further, the step of "collecting image information of the gold under test" includes:

[0019] Scanning the image information of the gold under test through 3D imaging technology;

[0020] Identifying a plurality of "protruding units" on the surface of the gold under test in the image information;

[0021] Calculating the surface area and height of the plurality of "protruding units" and calculating the volume "V" of the "protruding units".

[0022] Further, the step of "grabbing a plurality of "impurity units" on the surface of the gold under test in the image, and positioning the "impurity units" to obtain the positions of the "impurity units" on the detection platform" includes:

[0023] Calculating the coordinate position of the gold under test on the detection platform;

[0024] Calculating the position of the "protruding units" on the surface of the gold under test to achieve the grabbing of the "impurity units";

[0025] Calculating the coordinate position of the "impurity units" on the detection platform.

[0026] Further, the step of "According to the positioning of the "impurity units", moving the gold under test so that the spectrometer measures the purity of the "impurity units" at multiple points" includes:

[0027] According to the coordinate position of each "impurity unit" on the detection platform and the coordinate position of the spectrometer detection end on the detection platform, the offset vector of each "impurity unit" and the spectrometer detection end is calculated;

[0028] According to the offset vector, the to-be-detected gold is moved so that the "impurity unit" is positioned below the spectrometer detection end, so as to realize the point measurement of the spectrometer on each "impurity unit";

[0029] The percentage content of different impurity metals in the "impurity unit" is obtained by using the spectrometer: "P1%, P2%, P3%...P n %";

[0030] According to the formula: N=(P1%*ρ1+P2%*ρ2+P3%*ρ3+...P n %*ρ n )*V, the mass of the impurity metal in the "impurity unit" is calculated.

[0031] Further, the step of "calculating the purity of the to-be-detected gold according to the purity measurement data of each "impurity unit"" comprises:

[0032] According to the formula: m=M-(N1+N2+N3+...N x ), the gold mass of the to-be-detected gold is calculated;

[0033] According to the formula: K=m / M, the purity of the to-be-detected gold is calculated.

[0034] Further, the present application also provides a device for detecting the purity of gold, which comprises a device main body, the device main body comprising a scanning device, a spectrometer, a detection platform, a moving mechanism and a weighing table, the detection platform being used for placing the to-be-detected gold, the moving mechanism being connected to the detection platform and being used for controlling the movement of the detection platform relative to the spectrometer, the weighing table being used for calculating the mass of the to-be-detected gold, the scanning device and the spectrometer being arranged above the detection platform, the scanning device being used for collecting image information of the to-be-detected gold, and the spectrometer being used for detecting the purity of the to-be-detected gold.

[0035] Further, the moving mechanism comprises a first sliding part, a first sliding groove, a second sliding part and a second sliding groove, and the detection platform comprises a first moving platform and a second moving platform;

[0036] The first sliding part is arranged at the lower end surface of the first moving platform, the first sliding groove is arranged on the device main body, and the first sliding part is slidingly connected to the first sliding groove to realize the movement of the first moving platform relative to the device main body in the X-axis direction;

[0037] The second sliding part is arranged on the lower end surface of the second moving platform, the second sliding groove is arranged on the upper end surface of the first moving platform, and the second sliding part is slidingly connected to the second sliding groove to realize the movement of the second moving platform relative to the first moving platform in the Y-axis direction.

[0038] Further, the detection platform further comprises an alignment mechanism, the alignment mechanism comprises a first alignment unit, a second alignment unit, a third alignment unit and a fourth alignment unit, the first alignment unit and the second alignment unit are arranged parallel to the first side and the second side of the detection platform respectively, and can move parallel to the first side and the second side of the detection platform respectively, and the third alignment unit and the fourth alignment unit are arranged parallel to the third side and the fourth side of the detection platform respectively, and can move parallel to the third side and the fourth side of the detection platform respectively.

[0039] Further, the scanning device is a three-dimensional scanner.

[0040] Beneficial effects: through the above-mentioned method for detecting the purity of gold, when detecting the purity of gold, the melted gold can be placed on the detection platform, the 3D image information of the gold to be detected is collected by the camera, and all "impurity units" in the image information are captured and recognized to obtain the position coordinates of each "impurity unit". During detection, the gold to be detected can be moved according to the positioning coordinates of the "impurity units" on the detection platform, so that the above-mentioned each "impurity unit" is positioned below the detection end of the spectrometer, so that the spectrometer can accurately measure each "impurity unit" at multiple points, thereby improving the accuracy of gold purity detection.

[0041] Further, the present application further provides a device for detecting the purity of gold. When the purity of the gold to be detected needs to be detected, the gold to be detected can be placed on the detection platform, the total mass of the gold to be detected is calculated by the weighing table, and the scanning device is started to collect the image information of the gold to be detected, so as to realize the capture and positioning of the "impurity units". Further, when the gold to be detected needs to be moved, the detection platform can be moved by the moving mechanism, so that the gold to be detected moves relative to the detection end of the spectrometer, so that the spectrometer can measure each "impurity unit" at multiple points, which is convenient to use and easy to operate. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0043] Figure 1 It is a flowchart of the method for detecting the purity of gold.

[0044] Figure 2 is a flow chart of step S1;

[0045] Figure 3 is a flow chart of step S2;

[0046] Figure 4 is a flow chart of step S3;

[0047] Figure 5 is a flow chart of step S4;

[0048] Figure 6 is a flow chart of step S5;

[0049] Figure 7 is a perspective view of a device for detecting the purity of gold according to the present application;

[0050] Figure 8 is a top view of the alignment mechanism and the detection platform. DETAILED DESCRIPTION

[0051] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0053] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0054] The application will be described in detail below with reference to the drawings.

[0055] Embodiment one:

[0056] Reference Figure 1 The application provides a method for detecting gold purity, comprising the following steps:

[0057] S1: creating a detection platform and placing the gold to be detected on the detection platform;

[0058] S2: collecting image information of the gold to be detected on the detection platform;

[0059] S3: capturing a plurality of "impurity units" on the surface of the gold to be detected in the image and performing positioning operation on the "impurity units" to obtain the positions of the "impurity units" on the detection platform;

[0060] S4: moving the gold to be detected according to the positioning of the "impurity units" so that the spectrometer performs multi-point purity measurement on the "impurity units";

[0061] S5: calculating the purity of the gold to be detected according to the purity measurement data of each "impurity unit".

[0062] It should be noted that in this embodiment, before detecting the purity of the gold to be detected, the sample to be detected can be pretreated, that is, the gold to be detected is high-temperature smelted and then cooled and shaped into a thin sheet to form a sample to be detected. During smelting, because the gasification temperature of gold is higher than that of most metals, part of the metal impurities with low gasification temperature will be gasified during high-temperature smelting of gold. As for other metal impurities, the impurities with density greater than that of gold sink, and the impurities with density less than that of gold float up. Finally, the impurities will be in the form of particles and float out of the upper and lower surfaces of the gold block, and exhibit a luster and smoothness different from that of pure gold.

[0063] Through the above steps, when detecting the purity of gold, the smelted gold can be placed on the detection platform, the image information of the gold to be detected is collected by the camera, and all "impurity units" in the image information are captured and recognized to obtain the positions of the "impurity units". When accurate multi-point measurement of each "impurity unit" is needed, the gold to be detected can be moved by moving the detection platform or by other positioning mechanisms, so that the "impurity units" on the gold to be detected are positioned below the detection end of the spectrometer, so as to realize multi-point measurement of the "impurity units" by the spectrometer, and the purity of the gold to be detected is calculated more accurately.

[0064] Further, reference Figure 2 In this embodiment, the step "S1: creating a detection platform and placing the gold to be detected on the detection platform" further comprises:

[0065] S11: creating an initial coordinate system of the detection platform;

[0066] S12: initialize the coordinates of the detection platform on the detection end of the spectrometer;

[0067] S13: place the gold to be tested on the detection platform;

[0068] S14: weigh the gold to be tested on the detection platform to obtain the total mass "M" of the gold to be tested.

[0069] In the above steps, the initial coordinate system of the detection platform is created to help locate the gold to be tested and the relative position of the detection end of the spectrometer on the detection platform. The gold to be tested is weighed to obtain the total mass "M" of the gold to be tested, which is used for subsequent calculation of the purity of the gold to be tested.

[0070] Further, with reference to Figure 3 In this embodiment, the step "S2: collect image information of the gold to be tested on the detection platform" further includes:

[0071] S21: scan the image information of the gold to be tested by 3D imaging technology;

[0072] S22: identify a plurality of "raised units" on the surface of the gold to be tested in the image information;

[0073] S23: calculate the surface area and height of the plurality of "raised units" and calculate the volume "V" of the "raised units".

[0074] Through the above steps, when collecting the image of the gold to be tested, a three-dimensional scanner is used to comprehensively scan the gold to be tested, and the gray data in the collected image is used to identify a plurality of "raised units" on the surface of the gold to be tested. Further, for the plurality of "raised units" identified, the surface area and height of the "raised units" are calculated, and the volume "V" of the "raised units" is calculated, which is used for subsequent calculation of the impurity mass in the "raised units".

[0075] Further, with reference to Figure 4 In this embodiment, the step "S3: grab a plurality of "impurity units" on the surface of the gold to be tested in the image, and perform positioning operation on the "impurity units"" further includes:

[0076] S31: calculate the coordinate position of the gold to be tested on the detection platform;

[0077] S32: calculate the position of the "raised units" on the surface of the gold to be tested to realize the grabbing of the "impurity units";

[0078] S33: calculate the coordinate position of the "impurity units" on the detection platform.

[0079] By the above steps, by calculating the coordinates of the to-be-tested gold on the detection platform and the positions of the "protruding units" on the surface of the to-be-tested gold respectively, the positioning operation of the "impurity units" on the detection platform can be realized.

[0080] Further, with reference to Figure 5 In the embodiment, the step "S4: moving the to-be-tested gold, and using the spectrometer to perform multi-point measurement on the "impurity units" that have been positioned to detect the gold purity in each "impurity unit" further comprises:

[0081] S41: calculating the offset vectors of each "impurity unit" and the detection end of the spectrometer according to the coordinate positions of each "impurity unit" on the detection platform and the coordinate position of the detection end of the spectrometer on the detection platform;

[0082] S42: moving the to-be-tested gold according to the offset vectors so that the "impurity units" are positioned below the detection end of the spectrometer to realize the point measurement of the spectrometer on each "impurity unit";

[0083] S43: using the spectrometer to obtain the percentage contents of different impurity metals in the "impurity units": "P1%, P2%, P3%...P n %";

[0084] S44: calculating the mass of the impurity metals in the "impurity units" according to the formula: N = (P1%*p1+P2%*p2+P3%*p3+...P n %*p n )*V.

[0085] It can be understood that, in order to realize the multi-point measurement of the spectrometer on each "impurity unit", the coordinate position of the detection end of the spectrometer on the detection platform can be taken as a reference coordinate, the coordinate of each "impurity unit" on the detection platform is compared with the reference coordinate, the offset vectors of each "impurity unit" relative to the reference coordinate are calculated, and then the to-be-tested gold is moved according to each offset vector to realize the accurate multi-point measurement of the spectrometer on each "impurity unit", which is ingenious in design and simple in operation. Further, when detecting a single "impurity unit", the spectrometer will feed back the percentage contents of different types of metal impurities contained in the "impurity unit" in the total volume of the "impurity unit": "P1%, P2%, P3%...P n %", wherein P1% is the percentage content of impurity metal 1, P2% is the percentage content of impurity metal 2, P3% is the percentage content of impurity metal 3...P n% is the percentage content of impurity metal n, and because the density of the metal can be looked up from a known metal, the mass N of the impurity metal in a certain single "impurity unit" can be calculated from the above data, i.e. N = P1% * p1 + P2% * p2 + P3% * p3 +... P n % * p n * V, where V is the volume of a certain single "impurity unit", p1 is the density of impurity metal 1, p2 is the density of impurity metal 2, p3 is the density of impurity metal 3,... p n is the density of impurity metal n. It should be noted that the value of n above is determined according to actual conditions, i.e. n is the number of types of impurity metal in the "impurity unit".

[0086] It should be noted that according to the above steps, the impurity content of the to-be-tested gold on a certain surface can be measured, and in the actual detection process, the detector can flip the to-be-tested gold according to actual conditions and repeat the above detection steps to test the impurity content on different surfaces of the to-be-tested gold, so as to calculate the total impurity content on the surface of the to-be-tested gold.

[0087] Further, with reference to Figure 6 , in this embodiment, the step "S5: calculating the purity of the to-be-tested gold by the gold purity in each "impurity unit" further comprises:

[0088] S51: calculating the fine gold mass of the to-be-tested gold excluding impurities according to the formula: m = M - (N1 + N2 + N3 +... N x );

[0089] S52: calculating the purity of the to-be-tested gold according to the formula: K = m / M.

[0090] It can be understood that N1 is the total mass of the impurity metal in the first "impurity unit", N2 is the total mass of the impurity metal in the second "impurity unit", N3 is the total mass of the impurity metal in the third "impurity unit",... N x is the total mass of the impurity metal in the xth "impurity unit", it should be noted that the value of x above is determined according to actual conditions, i.e. x is the total number of "impurity units", M is the total mass of the to-be-tested gold, so the fine gold mass m = M - (N1 + N2 + N3 +... N x ), and the purity K of the gold = m / M.

[0091] Embodiment Two:

[0092] As Figure 7 , Figure 8As shown, the embodiment provides a device for detecting the purity of gold applied to the method of embodiment one, specifically, the device for detecting the purity of gold comprises a device body 1, the device body 1 comprises a scanning device 11, a spectrometer 12, a detection platform 13, a moving mechanism 14 and a weighing table (not shown in the figure), the detection platform 13 is used to place the gold to be detected, the moving mechanism 14 is connected to the detection platform 13 and is used to control the movement of the detection platform 13 relative to the spectrometer 12, the weighing table is used to calculate the mass of the gold to be detected, the scanning device 11 and the spectrometer 12 are arranged above the detection platform 13, the scanning device 11 is used to collect image information of the gold to be detected, and the spectrometer 12 is used to detect the purity of the gold to be detected.

[0093] Through the above structural arrangement, when it is necessary to detect the purity of gold, the gold to be detected can be placed on the detection platform, the total mass of the gold to be detected is calculated by the weighing table, the scanning device 11 is started to collect image information of the gold to be detected, so as to realize the grabbing and positioning of the "impurity unit", and further, when it is necessary to move the gold to be detected, the detection platform can be moved by the moving mechanism 14, so that the gold to be detected moves relative to the detection end of the spectrometer, so as to realize the multi-point measurement of the spectrometer on each "impurity unit".

[0094] Specifically, in the embodiment, the moving mechanism 14 comprises a first sliding part (not shown in the figure), a first sliding groove 141, a second sliding part (not shown in the figure) and a second sliding groove 142, and the detection platform 13 comprises a first moving platform 131 and a second moving platform 132.

[0095] The first sliding part is arranged at the lower end face of the first moving platform 131, the first sliding groove 141 is arranged on the device body 1, and the first sliding part is slidingly connected to the first sliding groove 141 to realize the movement of the first moving platform 131 relative to the device body 1 in the X-axis direction.

[0096] The second sliding part is arranged at the lower end face of the second moving platform 132, the second sliding groove 142 is arranged on the upper end face of the first moving platform 131, and the second sliding part is slidingly connected to the second sliding groove 142 to realize the movement of the second moving platform 132 relative to the first moving platform 131 in the Y-axis direction.

[0097] Through the above structural arrangement, when it is necessary to move the gold to be detected in the X-axis direction, the second moving platform 132 can be kept fixed, and the first moving platform 131 is moved, so as to realize the movement of the gold to be detected in the X-axis direction, and when it is necessary to move the gold to be detected in the Y-axis direction, the first moving platform 131 can be kept fixed, and the second moving platform 132 is moved, so as to realize the movement of the gold to be detected in the Y-axis direction.

[0098] Furthermore, as one embodiment of this invention, the detection platform 13 further includes an alignment mechanism 15. The alignment mechanism 15 includes a first alignment unit 151, a second alignment unit 152, a third alignment unit 153, and a fourth alignment unit 154. The first alignment unit 151 and the second alignment unit 152 are respectively arranged parallel to the first side and the second side of the detection platform 13, and can move parallel to the first side and the second side on the detection platform 13. The third alignment unit 153 and the fourth alignment unit 154 are respectively arranged parallel to the third side and the fourth side of the detection platform 13, and can move parallel to the third side and the fourth side on the detection platform 13.

[0099] With the above-mentioned structural setup, when moving the gold to be tested, the gold to be tested can also be pushed by the movement of the first alignment unit 151, the second alignment unit 152, the third alignment unit 153 and the fourth alignment unit 154 on the detection platform, thereby achieving fine adjustment of the position of the gold to be tested on the detection platform.

[0100] The above descriptions provide one or more embodiments in conjunction with specific details, but do not imply that the specific implementation of the present invention is limited to these descriptions. Any methods or structures that are similar to or identical to those of the present invention, or any technical deductions or substitutions made based on the concept of the present invention, should be considered within the scope of protection of the present invention.

Claims

1. A method of detecting the purity of gold, characterized in that, It comprises the following steps: Creating a detection platform and placing the gold to be tested on the detection platform; Collecting image information of the gold to be tested; Grabbing a number of "impurity units" on the surface of the gold to be tested in the image and performing positioning operation on the "impurity units" to obtain the positions of the "impurity units" on the detection platform; According to the positioning of the "impurity units", moving the gold to be tested so that the spectrometer performs purity measurement on multiple points of the "impurity units"; According to the purity measurement data of each "impurity unit", calculating the purity of the gold to be tested; The step of "creating a detection platform and placing the gold to be tested on the detection platform" comprises: Creating an initial coordinate system of the detection platform; Initializing the coordinates of the spectrometer on the detection platform; Placing the gold to be tested on the detection platform; Weighing the gold to be tested to obtain the total mass "M" of the gold to be tested; The step of "collecting image information of the gold to be tested" comprises: Scanning the image information of the gold to be tested through 3D imaging technology; Identifying a number of "protruding units" on the surface of the gold to be tested in the image information, wherein the impurities in the granular form floating on the surface of the gold to be tested during melting and cooling of the gold to be tested are the "protruding units"; Calculating the surface area and height of a number of the "protruding units" and calculating the volume "V" of the "protruding units"; The step of "grabbing a number of 'impurity units' on the surface of the gold to be tested in the image and performing positioning operation on the 'impurity units' to obtain the positions of the 'impurity units' on the detection platform" comprises: Calculating the coordinate position of the gold to be tested on the detection platform; Calculating the position of the "protruding units" on the surface of the gold to be tested to realize the grabbing of the "impurity units"; Calculating the coordinate position of the "impurity units" on the detection platform; The step of "according to the positioning of the 'impurity units', moving the gold to be tested so that the spectrometer performs purity measurement on multiple points of the 'impurity units'" comprises: According to the coordinate position of each "impurity unit" on the detection platform and the coordinate position of the spectrometer on the detection platform, calculating the offset vector of each "impurity unit" and the spectrometer; According to the offset vector, moving the gold to be tested so that the "impurity units" are positioned below the detection end of the spectrometer to realize the point measurement of the spectrometer on each "impurity unit"; The percentage volume content of different impurity metals in the "impurity unit" was measured using the spectrometer: "P1%, P2%, P3%...P n %"; According to the formula: N = (P1% * p1 + P2% * p2 + P3% * p3 +... P n % * p n )* V, the mass of the impurity metal in the impurity unit is calculated, wherein the p1, p2... p n are the densities of the impurity metal 1, the impurity metal 2... the impurity metal n, respectively; The step of "according to the purity measurement data of each 'impurity unit', calculating the purity of the gold to be tested" comprises: According to the formula: m=M-(N1+N2+N3+...N x ), the fine gold mass of the gold to be measured is calculated, wherein N1, N2...N x are the total mass of impurity metals in the first, second...xth "impurity unit", respectively. According to the formula: K = m / M, the purity of the gold to be tested is calculated.

2. An apparatus for detecting the purity of gold, characterized in that, The application discloses a gold purity detection device, which comprises a device body (1), a scanning device (11), a spectrometer (12), a detection platform (13), a moving mechanism (14) and a weighing table.

3. A device for detecting the purity of gold according to claim 2, characterized in that, The moving mechanism (14) comprises a first sliding part, a first sliding groove (141), a second sliding part and a second sliding groove (142), and the detection platform (13) comprises a first moving platform (131) and a second moving platform (132). The first sliding part is arranged on the lower end surface of the first moving platform (131), the first sliding groove (141) is arranged on the device body (1), and the first sliding part is slidably connected to the first sliding groove (141) so as to realize the movement of the first moving platform (131) relative to the device body (1) in the X-axis direction. The second sliding part is arranged on the lower end surface of the second moving platform (132), the second sliding groove (142) is arranged on the upper end surface of the first moving platform (131), and the second sliding part is slidably connected to the second sliding groove (142) so as to realize the movement of the second moving platform (132) relative to the first moving platform (131) in the Y-axis direction.

4. A device for detecting the purity of gold according to claim 2, characterized in that, The detection platform (13) further comprises a positioning mechanism (15), the positioning mechanism (15) comprises a first positioning unit (151), a second positioning unit (152), a third positioning unit (153) and a fourth positioning unit (154), the first positioning unit (151) and the second positioning unit (152) are arranged in parallel with the first side edge and the second side edge of the detection platform (13) respectively, and can move in parallel on the detection platform (13) relative to the first side edge and the second side edge respectively, and the third positioning unit (153) and the fourth positioning unit (154) are arranged in parallel with the third side edge and the fourth side edge of the detection platform (13) respectively, and can move in parallel on the detection platform (13) relative to the third side edge and the fourth side edge respectively.

5. A device for detecting the purity of gold according to claim 2, characterized in that, The scanning device (11) is a three-dimensional scanner.

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