Uranium ore hyperspectral detection device and method

Abstract

The invention belongs to the field of geological exploration, and particularly relates to a uranium ore hyperspectral detection device and method, and the device comprises a radioactive camera module which is used for carrying out the radioactive imaging measurement of a uranium ore sample; the light source module is used for providing a light source for the microscopic camera module and the hyperspectral camera module; the microscopic camera module is used for carrying out microscopic image acquisition on a specified small view field; the scanning module is used for carrying a radioactive camera, four imaging lenses and to-be-detected ore and driving the imaging lenses to perform two-dimensional motion so as to realize scanning; the hyperspectral camera module is used for shooting hyperspectral images of different wavebands; the radioactive camera module identifies radioactive abnormal information of a uranium ore sample and determines radioactive abnormal points or abnormal areas, and the scanning module drives the microscopic camera module and the hyperspectral camera module to perform hyperspectral imaging and microscopic image acquisition on the selected abnormal points or abnormal areas. According to the invention, accurate positioning of radioactivity abnormity and substance identification information can be realized.

Description

Technical Field

[0001] This invention belongs to the field of geological exploration, specifically relating to a hyperspectral detection device and method for uranium ore. Background Technology

[0002] In the field of uranium geological exploration, finding minerals related to uranium mineralization is of great significance for mineralization prediction. Hyperspectral imagers are essentially a combined image and spectrum remote sensing technology that integrates two-dimensional imaging and ground object spectral measurements, achieving spectral resolution on the nanometer scale. They can simultaneously acquire spatial, spectral, and radiometric information of the target object. Imaging spectroscopy organically combines traditional two-dimensional imaging remote sensing and spectral techniques. While acquiring spatial information of the target object using an imaging system, the spectral imager system decomposes the radiation of the target object into spectral radiation of different bands, enabling the acquisition of tens or even hundreds of continuous narrow-band information for each pixel within a spectral range. Imaging spectroradiometers, based on imaging spectral technology and incorporating a radiometric calibration system, convert the acquired spectral radiation values ​​of the target object into reflectance or radiance information, achieving simultaneous detection of images, spectra, and radiation.

[0003] Currently, the detection of surface defects on objects mostly uses high-resolution cameras and image recognition techniques, but the detection and recognition accuracy is relatively low. Summary of the Invention

[0004] The purpose of this invention is to provide a hyperspectral detection device and method for uranium ore, which achieves precise positioning of radioactive anomalies and material identification information through the synchronous triggering of a radioactive camera module, a light source module, a microscope camera module, a scanning module, and a hyperspectral camera module.

[0005] Technical solution to achieve the purpose of this invention:

[0006] A hyperspectral detection device for uranium ore, comprising:

[0007] A radioactive camera module for radioactive imaging measurements of uranium ore samples;

[0008] The light source module is used to provide a light source for the microscope camera module and the hyperspectral camera module.

[0009] The microscope camera module is used to acquire microscope images of a specified small field of view;

[0010] The scanning module is used to carry a radioactive camera and four imaging lenses, along with the ore to be tested, and to drive the imaging lenses to perform two-dimensional motion to achieve scanning.

[0011] The hyperspectral camera module is used to capture hyperspectral images in different wavelength bands;

[0012] The radioactive camera module identifies radioactive anomalies in uranium ore samples, determines radioactive anomaly points or regions, and drives the microscope camera module and hyperspectral camera module through the scanning module to perform hyperspectral imaging and microscopic image acquisition on the selected anomaly points or regions. The light source module provides light to the microscope camera module and hyperspectral camera module.

[0013] Furthermore, the light source module includes a halogen light source and a deuterium lamp light source, both of which are coupled into an optical fiber and then focused onto the plane to be measured by an imaging lens.

[0014] Furthermore, the deuterium lamp light source is a deuterium lamp with a spectral range of 180-400nm; the halogen light source is a halogen tungsten lamp with a spectral range of 400-2500nm.

[0015] Furthermore, the scanning module includes a scanning stage, a lifting stage, and a sample stage; the sample stage is equipped with a radioactive camera and four imaging lenses, namely a halogen light source imaging lens, a deuterium lamp light source imaging lens, a microscope camera imaging lens, and a hyperspectral camera imaging lens; the lifting stage is used to carry the ore to be tested; the scanning stage is used to drive the sample stage to perform two-dimensional fine motion to achieve scanning.

[0016] Furthermore, the hyperspectral camera module includes an infrared focal plane detector, a filter wheel, and a hyperspectral camera lens. Through precise assembly and adjustment, it forms the same field of view and the same optical path, and captures hyperspectral images of different wavelengths through different combinations of light sources and filters.

[0017] A hyperspectral detection method for uranium ore includes:

[0018] Step 1, System Assembly and Adjustment: Assembly and adjustment of stage, light source module, hyperspectral camera module, radiometric camera module, and microscope camera module;

[0019] Step 2: Field of view matching and lens distortion correction;

[0020] Step 3: Hyperspectral imaging aberration correction and spectral distortion control;

[0021] Step 4: Simultaneous triggering of the radioactive camera, hyperspectral camera, and microscope camera;

[0022] Step 5: Dynamically and precisely match the speed-to-height ratio and adjust the exposure time;

[0023] Step 6: Exception handling.

[0024] Further, step 1 includes:

[0025] The microscope camera is focused using a standard resolution board. The focal length of the microscope camera's imaging lens is adjusted to achieve the clearest image at the designed working distance, and the focal length of the lens is fixed. The lifting platform is precisely adjusted according to the thickness of the ore sample to achieve imaging distance matching through the operating software.

[0026] Adjust the light source, using a halogen light source to illuminate the optical fiber, and adjust the working distance and angle of the imaging lens until the light spot size is 1mm.

[0027] Adjust the hyperspectral camera, turn on the adjusted light source, and adjust the working distance and angle of the hyperspectral camera's imaging lens until the hyperspectral camera has the best response across the entire spectral range.

[0028] Further, step 2 includes:

[0029] A custom-designed, precise grid is placed on the stage. The pixel coordinates of each grid vertex on the global image are determined using a microscope camera. The scanning stage is moved until the hyperspectral camera acquires the spectral information of the grid vertices and the grid vertices are imaged at the center of the field of view of the radiometric camera. The position of the scanning stage for each vertex is recorded. The distortion is corrected by using the correspondence between the scanning stage position and the actual grid vertices. The translation stage movement position corresponding to each pixel in the global image is calculated using the correspondence.

[0030] Further, step 3 includes:

[0031] Aberrations were optimized for the visible-near-infrared and short-wave infrared bands of the hyperspectral camera module: Dispersion nonlinearity was compensated through coordinated optimization of the prism apex angle and grating tilt angle; chromatic aberration was corrected by using spherical lenses for spherical aberration correction and even-order aspherical lenses for chromatic aberration correction in the focusing lens group; Correction material matching: the refractive index temperature coefficients of the zinc sulfide prism and the ZnSe collimating lens were matched to reduce aberration drift caused by temperature changes; spectral aberration: the uniformity of the holographic grating's lines and the asymmetric prism design worked together to achieve spectral line curvature ≤0.3 pixels and chromatic aberration ≤0.2 pixels; Overlapping area stitching: Optical axis alignment: precision mechanical adjustment ensured that the optical axis deviation of the two modules was ≤5μrad; Data fusion: dual-module spectral data were collected from a standard white board, and spectral shift was corrected through polynomial fitting, with a stitching error ≤0.2 pixels.

[0032] Further, step 4 includes:

[0033] The main controller distributes global commands and monitors status. The synchronous trigger board enables high-precision clock synchronization and trigger signal generation for the radiometric camera, hyperspectral camera, and microscope camera. The hyperspectral camera receives the trigger signal and feeds back its status.

[0034] The beneficial technical effects of this invention are as follows:

[0035] 1. This invention can identify information about objects invisible to the naked eye through infrared hyperspectral imaging, effectively improving the accuracy of detection and identification; it can accurately express the radioactivity intensity of the sample by acquiring radioactive images of the radioactive sample through a radioactive camera; under the condition of simultaneous imaging of hyperspectral and radioactivity, it can identify mineral information with radioactive anomalies; at the same time, it can achieve precise positioning of radioactive anomalies and material identification information by using a high-resolution microscopic detection device.

[0036] 2. This invention can extract information such as altered minerals and radioactive material content related to radioactive anomalies. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a hyperspectral detection device for uranium ore provided by the present invention;

[0038] Figure 2 This is the optical path diagram of the focusing lens;

[0039] Figure 3 This is a diagram illustrating the distortion.

[0040] Figure 4 A schematic diagram of the main user interface. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0042] like Figure 1 As shown, the present invention provides a hyperspectral detection device for uranium ore, comprising:

[0043] The device consists of five modules: a radioactive camera module, a light source module, a microscope camera module, a scanning module, and a hyperspectral camera module. These modules work together to trigger the formation of a hyperspectral detection device for uranium ore samples.

[0044] Radioactive camera module 2 is used for radioactive imaging measurements of uranium ore samples.

[0045] The light source module provides light for the microscope camera module 5 and the hyperspectral camera module. The light source module includes a halogen light source 3 and a deuterium lamp light source 4. Both the halogen light source 3 and the deuterium lamp light source 4 are coupled into an optical fiber 6 and then focused onto the plane to be measured by an imaging lens. Figure 2 As shown. Specifically, the deuterium lamp light source 4 is a deuterium lamp (180-400nm), and the halogen light source 3 is a halogen tungsten lamp (400-2500nm).

[0046] The microscope camera module 5 is used to acquire microscope images of a specified small field of view. The acquisition of microscope images includes single-point microscope image acquisition (a single microscope image centered on the selected point) and local (selected area) microscope image acquisition.

[0047] Scanning module 9 is used to carry a radiometric camera and four imaging lenses, along with the ore to be tested, and to drive the imaging lenses in two-dimensional motion to achieve scanning. Scanning module 9 includes a scanning stage, a lifting stage, and a sample stage. The translation stage, lifting stage, and sample stage are interconnected via circuit boards and mechanical structures to achieve synchronous triggering of electronic signals. Two imaging lenses are used to focus the light emitted by the deuterium lamp and halogen tungsten lamp onto the surface to be tested; the other two imaging lenses are used to collect the spectrum reflected by the ore and feed it into an optical fiber, such as... Figure 1 As shown.

[0048] The stage is equipped with a radiometric camera and four imaging lenses: a halogen light source imaging lens, a deuterium lamp light source imaging lens, a microscope camera imaging lens, and a hyperspectral camera imaging lens. A lifting platform is used to support the ore to be tested. The scanning stage is used to drive the stage in two-dimensional fine motion to achieve scanning.

[0049] Specifically, the scanning stage is a two-dimensional electric scanning stage, and the lifting stage is an electric lifting stage.

[0050] The hyperspectral camera module includes an infrared focal plane detector 1, a filter wheel 7, and a hyperspectral camera lens 8. Through precise assembly and adjustment, it forms the same field of view and the same optical path, and captures images of different wavelengths by different combinations of light sources and filters.

[0051] Radioactive camera module 2 identifies radioactive anomalies in uranium ore samples, determines radioactive anomaly points or regions, and drives microscope camera module 5 and hyperspectral camera module through scanning module 9 to perform hyperspectral imaging and microscopic image acquisition on the selected anomaly points or regions. The light source module provides light to microscope camera module 5 and hyperspectral camera module.

[0052] When the device of this invention is in operation, it first automatically identifies and views the radioactive anomaly information of the object under test through the radioactive camera module 2. Once an anomaly point or region is identified, it is selected by clicking or drawing a box with the mouse. Based on the coordinates of the image point on the reflective image, the motor is triggered to activate the scanning module 9. Simultaneously, the motor drives the microscope camera module and the hyperspectral camera module to perform hyperspectral imaging and microscopic image acquisition on the selected anomaly point or region. During the acquisition process, the field of view of the hyperspectral camera module is larger than that of the microscope camera module. Therefore, the step selection of the scanning module is mainly based on the field of view change requirements of the hyperspectral camera module. The light source module mainly provides illumination for the hyperspectral imaging and microscopic imaging and remains on throughout the scanning process. The illumination can be turned off when the radioactive camera needs to take images independently.

[0053] This invention provides a hyperspectral detection method for uranium ore, specifically including the following steps:

[0054] Step 1: System Assembly and Adjustment: Assembly and adjustment of the stage, light source module, hyperspectral camera module, radiometric camera module, and microscope camera module.

[0055] The hyperspectral camera module needs to be installed at a suitable height for the lens's working distance and rely on a mechanical structure to ensure absolute stability. Focusing requires the use of an electric focusing ring to compensate for chromatic aberration in the lens. Before leaving the factory, different filters are used to photograph a standard resolution chart, and the focusing ring is adjusted until the image is sharpest. The position of the focusing ring corresponding to each filter is recorded. During use, when switching between different filters, the electric focusing ring automatically adjusts the lens focal length.

[0056] The stage is equipped with a radioactive camera and four imaging lenses (halogen light source imaging lens, deuterium light source imaging lens, microscope imaging lens, and hyperspectral camera imaging lens). The support structure design is required to ensure the absolute stability of the five optical elements, which are then adjusted and tightened in sequence.

[0057] The first step involves using a standard resolution board to assist in focusing the microscope camera. Adjusting the focal length of the microscope's imaging lens to achieve the clearest image at the designed working distance, and then fixing the lens focal length. For thicker ores, the lifting platform needs to be precisely adjusted using the operating software to match the imaging distance according to the thickness of the sample.

[0058] The second step is to adjust the light source. Use a halogen light source to illuminate the optical fiber and adjust the working distance and angle of the imaging lens until the light spot size is 1mm.

[0059] The third step is to adjust the hyperspectral camera. Considering the simple structure of the imaging mirror and its poor chromatic aberration correction capability, turn on the adjusted light source and adjust the working distance and angle of the hyperspectral camera's imaging lens until the hyperspectral camera has the best response across the entire spectral band (comprehensive evaluation, increasing the evaluation weight of bands with poor response).

[0060] Step 2: Field of view matching and lens distortion correction

[0061] Field-of-view matching and lens distortion correction achieve precise matching between the selected area on the global image and the scanning area of ​​the scanning stage. After all hardware is assembled and adjusted, a custom-designed precision grid is placed on the stage. The pixel coordinates of each grid vertex on the global image are determined using a microscope camera. The scanning stage is moved until the hyperspectral camera acquires the spectral information of the grid vertices, and the grid vertices are imaged at the center of the field of view of the radiometric camera. The position of the scanning stage for each vertex is recorded. Ideally, the position of the scanning stage and the grid vertices are linearly related, but the lens distortion increases closer to the edge of the field of view, such as... Figure 3 As shown, distortion can be corrected by utilizing the correspondence between the scanning stage position and the actual grid vertices, and the translation stage movement position corresponding to each pixel in the global image can be calculated using this correspondence.

[0062] In actual use, the matching accuracy requirement is not high. You can choose an area that is slightly larger than the actual reading selection box, as long as the area scanned by the scanning station completely includes the user's selected area.

[0063] Step 3: Hyperspectral Imaging Aberration Correction and Spectral Distortion Control

[0064] The hyperspectral camera module includes two spectral bands: visible-near infrared and short-wave infrared. Aberrations are optimized for each spectral band while ensuring spectral consistency in overlapping areas.

[0065] Dispersion nonlinearity is compensated through the coordinated optimization of the prism apex angle and the grating tilt angle; chromatic aberration is corrected by using a combination of "spherical lens (correcting spherical aberration) + even-order aspherical lens (correcting chromatic aberration)" in the focusing lens group. Correction material matching: the refractive index temperature coefficient (dn / dT≈1e-5 / ℃) of the zinc sulfide prism and the ZnSe collimating lens is matched to reduce aberration drift caused by temperature changes; spectral aberration: the uniformity of the holographic grating (error ≤0.05μm) is combined with the asymmetric prism design (base angle 50°), resulting in spectral line curvature ≤0.3 pixels and chromatic aberration ≤0.2 pixels. Overlapping area (900-1000nm) splicing: Optical axis alignment: Through precision mechanical adjustment (laser collimator + autocollimator), ensure that the optical axis deviation of the dual modules is ≤5μrad; Data fusion: Collect the dual-module spectral data of a standard white board (900-1000nm uniform reflectivity), and correct the spectral shift through polynomial fitting, with a splicing error ≤0.2 pixels.

[0066] Step 4: Synchronous triggering of the radioactive camera, hyperspectral camera, and microscope camera.

[0067] To address the spatiotemporal coordination requirements of multi-source sensors (radioactive cameras, hyperspectral cameras, and microscopic cameras), the main approach is "high-precision clock synchronization → low-latency timing control → high-speed data caching → multi-source data alignment." The goal is to achieve time synchronization accuracy better than 1μs, caching latency better than 0.1ms, and spatial registration accuracy better than 0.5 pixels, thus supporting the high-fidelity requirements of subsequent radiometric correction and spectral inversion.

[0068] The system adopts a distributed architecture consisting of a master controller, a synchronous trigger board, and a sensor slave. The master controller distributes global commands and monitors the status, while the synchronous trigger board enables high-precision clock synchronization and trigger signal generation for multiple sensors. The hyperspectral camera receives the trigger signal and provides feedback on the status.

[0069] Time synchronization is fundamental to the spatiotemporal alignment of multi-source data. A μs-level synchronization accuracy is achieved through a combination of hardware clock phase-locked loop (PLL) and software protocol compensation. An OCXO (temperature-controlled crystal oscillator) with frequency stability ≤1e-10 is used, and a 10MHz synchronization clock (phase jitter ≤50ps) is generated via an internal PLL. The FPGA generates multiple synchronous trigger pulses based on the reference clock, according to instructions from the main controller (e.g., scan start). The phase difference between pulses is precisely controlled by an internal FPGA counter (1ns step), ensuring a trigger time difference of ≤1μs between multiple sensors. Upon receiving a trigger signal, each sensor captures the current reference clock count value via hardware. At 10MHz, the counting accuracy is 0.1μs. Combined with the main controller's global timestamp (GPS time), a "trigger-acquisition" log with absolute time is generated for subsequent data alignment.

[0070] Step 5: Dynamically and precisely match the speed-to-height ratio and adjust the exposure time.

[0071] The conveyor platform is driven by a servo motor, with a linear guide rail and a speed range of 0.1-600 mm / s. The encoder provides real-time position feedback (resolution 1 μm). The FPGA calculates the current speed-to-height ratio V (mm / s) by reading the encoder pulse frequency (f = speed / step size), and dynamically adjusts the exposure time T by combining the sensor pixel size p (e.g., 10 μm) and the optical system pixel ground resolution GSD (GSD = p / optical magnification).

[0072] Step 6, Exception Handling

[0073] Monitor sensor frame rate (required to be ≥95% of target frame rate) and buffer occupancy rate (data transfer is triggered when the threshold is 80%); if the trigger fails (e.g., the sensor does not return a "acquisition complete" signal), the main controller resends the trigger pulse (up to 3 times), and if it still fails, an error is reported and scanning is paused.

[0074] In one specific embodiment, the detection method provided by the present invention is used to perform hyperspectral detection on uranium ore samples, as follows: Figure 4This is a schematic diagram of the main operating interface. The hyperspectral camera needs to be mounted at a suitable height and working distance from the lens, and its structure must ensure absolute stability. The microspectrometer and light source are connected to the imaging lens via optical fiber. The radiometric camera and two imaging lenses are mounted on the stage. The scanning stage drives the stage to perform two-dimensional fine motion to achieve scanning. The first step is to use a standard resolution board to assist in focusing the microscope camera, adjusting the lens focal length to achieve the clearest image at the designed working distance, and then fixing the lens focal length. The second step is to adjust the microscope camera. Using reverse illumination, a visible light illumination source is connected to one end of the optical fiber connected to the spectrometer. The working distance and working angle of the imaging mirror at the other end of the optical fiber are adjusted, and the light spot on the working surface is observed with the microscope camera until the light spot is minimized. The third step is to adjust the light source brightness and the hyperspectral camera integration time to suitable values, and adjust the working distance and angle of the imaging mirror at the light source illumination end until the hyperspectral camera acquires the strongest signal. After all hardware is assembled and adjusted, a custom-designed precise grid is placed. A hyperspectral camera is used to determine the pixel coordinates of each grid vertex on the global image. The scanning stage is moved until the hyperspectral camera acquires the spectral information of each grid vertex, and the grid vertex is imaged at the center of the field of view of the radiometric camera. The position of the translation stage for each vertex is recorded. Ideally, the translation stage position and the grid vertex position have a linear relationship. However, the lens distortion increases closer to the edge of the field of view. The actual correspondence can be used to correct the distortion, and the translation stage movement position corresponding to each pixel in the global image can be calculated using this correspondence.

[0075] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. All contents not described in detail in the present invention can be derived from existing technologies.

Claims

1. A device for hyperspectral detection of uranium ore, characterized in that, The application relates to a multi-spectral imaging system for uranium ore sample, which comprises the following parts: a radioactive camera module (2) for radioactive imaging measurement of a uranium ore sample; a light source module for providing light sources for a microscopic camera module (5) and a hyperspectral camera module; the microscopic camera module (5) is used for microscopic image collection of a specified small field of view; a scanning module (9) is used for carrying the radioactive camera and four imaging lenses, the ore to be measured, and driving the imaging lenses to move in two dimensions to realize scanning; the hyperspectral camera module is used for shooting hyperspectral images of different wave bands; the radioactive camera module (2) identifies radioactive abnormal information of the uranium ore sample, determines radioactive abnormal points or abnormal areas, drives the microscopic camera module (5) and the hyperspectral camera module through the scanning module (9), and carries out hyperspectral imaging and microscopic image collection on the selected abnormal points or abnormal areas, and the light source module provides light sources for the microscopic camera module (5) and the hyperspectral camera module.

2. The hyperspectral detection device for uranium ore according to claim 1, characterized in that, The light source module comprises halogen light sources (3) and deuterium lamp light sources (4), and the halogen light sources (3) and the deuterium lamp light sources (4) are coupled into optical fibers (6) and then focused on a plane to be measured through imaging lenses.

3. The hyperspectral detection device for uranium ore according to claim 2, characterized in that, The deuterium lamp light sources (4) are deuterium lamps, and the spectral range is 180-400nm; the halogen light sources (3) are halogen tungsten lamps, and the spectral range is 400-2500nm.

4. The hyperspectral detection device for uranium ore according to claim 1, characterized in that, The scanning module (9) comprises a scanning table, a lifting table and a carrying table; the carrying table is used for carrying the radioactive camera and four imaging lenses, and the four imaging lenses are halogen light source imaging lenses, deuterium lamp light source imaging lenses, microscopic camera imaging lenses and hyperspectral camera imaging lenses respectively; the lifting table is used for carrying the ore to be measured; and the scanning table is used for driving the carrying table to move in two dimensions to realize scanning.

5. The hyperspectral detection device for uranium ore according to claim 1, characterized in that, The hyperspectral camera module comprises infrared focal plane detectors (1), a filter wheel (7) and hyperspectral camera lenses (8), and the same field of view and the same light path are formed through accurate adjustment, and different wave band hyperspectral images are shot through different combinations of light sources and filters.

6. A method for hyperspectral detection of uranium ore, characterized in that, The application further relates to a multi-spectral imaging method for uranium ore sample, which comprises the following steps: Step 1, system adjustment: carrying table adjustment, light source module adjustment, hyperspectral camera module adjustment, radioactive camera module adjustment and microscopic camera module adjustment; Step 2, field of view matching and lens distortion correction; Step 3, hyperspectral imaging aberration correction and spectral distortion control; Step 4, synchronous triggering of the radioactive camera, the hyperspectral camera and the microscopic camera; Step 5, dynamic accurate matching of speed and height ratio, and exposure time adjustment; Step 6, abnormality processing.

7. The method according to claim 6, wherein, The step 1 comprises the following steps: a standard resolution plate is used to assist in focusing the microscopic camera, the imaging lens focal length of the microscopic camera is adjusted to be the most clear under the design working distance, the lens focal length is fixed, the ore is adjusted to match the imaging distance through the lifting table according to the thickness of the sample to be measured, the light source is adjusted, the halogen light source is used to illuminate the optical fiber, the working distance and the angle of the imaging lens are adjusted until the light spot size of the light source is 1mm, the hyperspectral camera is adjusted, the adjusted light source is turned on, the working distance and the angle of the hyperspectral camera imaging lens are adjusted until the response of the hyperspectral camera in the whole spectral range is optimal. The step 2 comprises the following steps: ​ 8. The method according to claim 6, characterized in that, ​ A customized precise grid chart is put on the stage, the pixel coordinates of each grid vertex of the grid chart in the global image are determined by the microscope camera, the scanning stage is moved until the spectral information of the grid vertex is obtained by the hyperspectral camera, the grid vertex is imaged in the center of the field of view of the radioactive camera, and the positions of the scanning stage corresponding to each vertex are recorded; the distortion is corrected using the positions of the scanning stage and the actual correspondence of the grid vertices, and the motion positions of the translation stage corresponding to each pixel point of the global image are calculated using the correspondence.

9. The method according to claim 6, wherein, The step 3 comprises: The aberrations of the visible-near infrared and short-wave infrared spectral bands of the hyperspectral camera module are optimized respectively: the dispersion nonlinearity is compensated by the cooperative optimization of the prism vertex angle and the grating tilt angle; the chromatic aberration is corrected by the combination of the spherical aberration correction of the spherical lens and the chromatic aberration correction of the even aspheric lens; the correction material is adapted: the refractive index temperature coefficients of the zinc sulfide prism and the ZnSe collimating mirror are matched to reduce the aberration drift caused by temperature change; the spectral distortion: the line uniformity of the holographic grating is cooperated with the asymmetric prism design, the spectral line curvature is less than or equal to 0.3 pixels, and the chromatic aberration is less than or equal to 0.2 pixels; the overlap area splicing: the optical axis alignment: through precise mechanical adjustment, the optical axis deviation of the double modules is less than or equal to 5 mu rad; data fusion: the double-module spectral data of the standard white board are collected, the spectral shift is corrected by polynomial fitting, and the splicing error is less than or equal to 0.2 pixels.

10. The method of claim 6, wherein the method is a hyperspectral detection method for uranium ore. The step 4 comprises: The global instruction distribution and state monitoring are performed by the main controller, the high-precision clock synchronization and trigger signal generation of the radioactive camera, the hyperspectral camera and the microscope camera are realized by the synchronous trigger board, the hyperspectral camera receives the trigger signal and feeds back the state.

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