Variable modulation portable single-wavelength energy dispersion X-ray luminoscope system

Abstract

The invention provides an energy-variable modulation portable single-wavelength energy-dispersive X-ray luminoscope system, which belongs to the field of X-ray modulation, and comprises an X-ray light tube, a hyperbolic bent crystal and a sample which are arranged on the same horizontal plane, the X-ray light tube, the hyperbolic bent crystal and the sample are distributed on the horizontal plane according to the Rowland circle position, and an annular guide rail is arranged according to the Rowland circle structure. The positions of the X-ray light tube and the hyperbolic bent crystal are adjusted through the controller, the X-ray light tube enables X-rays to enter the position of the hyperbolic bent crystal, the X-rays are diffracted to a sample through the hyperbolic bent crystal, the X-rays reflected by the sample are collected through the X-ray detector, signal amplification is carried out on collected data through the preamplifier, and the collected data are transmitted to the hyperbolic bent crystal through the hyperbolic bent crystal. The amplified model is subjected to wavelength analysis through a multi-channel analyzer, the data subjected to wavelength analysis are imported into a data processor for secondary processing, and then the processed data are displayed through a display.

Description

Technical Field

[0001] The invention belongs to the field of X-ray modulation, and in particular relates to a portable single-wavelength energy-dispersive X-ray fluorescence instrument system with variable modulation. Background Art

[0002] At present, with the continuous development of science and technology, the importance of material analysis and element detection in various fields has become increasingly prominent, especially in environmental monitoring, material science, archaeology, forensic medicine, etc. X-ray fluorescence (XRF) technology, as a fast and non-destructive analytical method, has attracted widespread attention due to its high sensitivity to elements and wide range of applications.

[0003] Although traditional XRF instruments perform well in laboratory analysis, they are often bulky and complex to operate, making it difficult to meet the needs of rapid on-site detection. Therefore, the development of a portable single-wavelength energy-dispersive X-ray fluorescence instrument system came into being, aiming to provide users with an efficient, flexible, and easy-to-operate analysis tool. The core feature of this system is its variable modulation capability. By modulating the wavelength of the X-rays, the system can optimize the analysis for different elements and materials, improving the accuracy and sensitivity of the detection. Traditional XRF instruments usually use X-rays with a fixed wavelength, which may limit the analysis of certain specific elements. The variable modulation design enables the instrument to flexibly adjust the wavelength according to actual needs, thereby achieving efficient detection of multiple elements, especially in complex samples or multi-element analysis. This advantage is particularly prominent.

[0004] In addition, the portable design enables the instrument to be operated in a variety of field environments without the need for expensive laboratory equipment and complex sample pretreatment. Users only need to carry the device to quickly perform elemental analysis on site and obtain instant results. This feature is particularly important for emergency response, environmental monitoring and other occasions, and can provide timely data support for decision-making. The single-wavelength design also simplifies the structure and operation process of the instrument, lowers the threshold for use, and allows more non-professionals to quickly get started and operate it. The system has a wide range of applications, including but not limited to soil pollution detection, ore composition analysis, quality control of metal materials, and cultural relics protection. In soil pollution monitoring, traditional methods often require complex sample processing and long analysis time, while portable XRF instruments can quickly identify heavy metal elements in the soil, helping environmental protection workers to assess the pollution situation in a timely manner. In the mining field, the system can be used for ore composition analysis, guide mining and processing, and improve resource utilization efficiency. In cultural relics protection, the instrument can non-invasively analyze the composition of cultural relics, help experts understand the material properties of cultural relics, and provide a scientific basis for protection and restoration.

[0005] The development of the portable single-wavelength energy-dispersive X-ray fluorescence instrument system has not only promoted the popularization of XRF technology, but also provided a new solution for rapid on-site detection. With the continuous advancement of technology, the system will continue to improve and upgrade, and is expected to play an important role in more fields in the future, helping scientific research and industrial development. Through this efficient and flexible analytical method, the composition of the environment and materials can be more accurately grasped, promoting the realization of sustainable development goals. Summary of the invention

[0006] The present invention proposes a portable single-wavelength energy-dispersive X-ray fluorescence instrument system with variable modulation, which solves the technical problems in the prior art that the target element signal interference is large and the continuous spectrum background scattering cannot be eliminated. The portable X-ray fluorescence instrument can quickly and accurately analyze the elemental composition of the sample on site, thereby improving the ease of operation and data processing efficiency.

[0007] The technical solution of the present invention is implemented as follows: a variable modulation portable single-wavelength energy-dispersive X-ray fluorescence instrument system, including an X-ray tube, a hyperbolic bent crystal and a sample arranged on the same horizontal plane, the X-ray tube, the hyperbolic bent crystal and the sample are distributed on the horizontal plane according to the Rowland circle position, and a circular guide rail is arranged according to the Rowland circle structure, the position of the X-ray tube and the hyperbolic bent crystal is adjusted by a controller, the X-ray tube incidents the X-ray to the hyperbolic bent crystal position, the X-ray is diffracted onto the sample through the hyperbolic bent crystal, the X-ray reflected by the sample is collected by the X-ray detector, and then the collected data is amplified by the preamplifier, and then the amplified model is subjected to wavelength analysis by a multi-channel analyzer, the wavelength analyzed data is imported into the data processor for secondary processing, and then the processed data is displayed by the display.

[0008] The overall design of the system adopts the layout of the Rowland circle, placing the X-ray tube, hyperbolic crystal and sample on the same horizontal plane. This design optimizes the incident and diffraction paths of the X-rays and ensures efficient signal collection. Traditional X-ray fluorescence instruments often arrange these components in a dispersed manner, resulting in signal loss and increased system complexity. However, this system distributes them according to the Rowland circle position, which not only improves the rationality of the optical path, but also maximizes the signal strength and stability.

[0009] The system introduces the design of auxiliary moving lines, which allows the X-ray tube and hyperbolic crystal to be precisely adjusted along the set trajectory. This function greatly enhances the flexibility and adaptability of the system, allowing users to quickly adjust the position of components and optimize measurement conditions according to different experimental requirements. Traditional systems usually lack flexible adjustment mechanisms in this regard, and users often need to manually disassemble or adjust components, which is time-consuming and error-prone, affecting experimental efficiency.

[0010] The signal processing flow of the system also reflects a high level of technical integration. After the collected X-ray signal is amplified by the preamplifier, it directly enters the multi-channel analyzer for wavelength analysis. This design makes the signal processing process more efficient and reduces the signal loss or attenuation problems common in traditional X-ray fluorescence instruments. Traditional instruments often require multiple signal conversions and processing, which may lead to information loss and reduced signal quality. This system ensures data integrity and accuracy through an optimized signal processing path.

[0011] In terms of data processing, the instrument uses a data processor to perform secondary processing on the data after wavelength analysis, providing users with more detailed analysis results. Traditional X-ray fluorescence instruments are usually simple in data processing, relying on basic signal processing and analysis, and lack the ability to conduct in-depth analysis of complex data. The design of this system allows users to perform more complex data calculations and analysis, thus providing a more reliable basis for quantitative analysis of sample components.

[0012] The system displays the processed data on a monitor, allowing users to view experimental results in real time. Traditional systems often rely on external computers or other devices for data display, which not only increases the complexity of operation, but also may cause delays and errors in the data transmission process. The integrated design of this system makes data processing and display seamlessly connected, allowing users to obtain experimental data in real time, improving the convenience and efficiency of experimental operations.

[0013] As a preferred embodiment, two slide rail moving frames are installed on the annular guide rail, and X-ray tubes and samples are respectively installed on the slide rail moving frames. The motors on the slide rail moving frames are controlled by a controller to move and operate the slide rail moving frames to move on the annular guide rail.

[0014] As a preferred embodiment, the X-ray tube and the hyperbolic bent crystal diffract the X-rays through the bent crystal onto the sample according to the Rowland circle principle, and the optical path structure is designed according to the following formula:

[0015] nλ=2dsinθ;

[0016] Where d is the interplanar spacing, θ is the angle between the incident X-ray and the corresponding crystal plane, λ is the wavelength of the X-ray, and n is the diffraction order.

[0017] As a preferred embodiment, when designing the optical path structure, by adjusting the crystal plane spacing and the angle between the incident X-ray and the corresponding crystal plane, the interference of non-target element signals is reduced, the continuous spectrum background scattering is eliminated, the sensitivity of the single-wavelength energy-dispersive X-ray fluorescence instrument is improved, and the peak-to-background ratio is increased.

[0018] As a preferred embodiment, the controller changes the diffraction angle of the hyperbolic crystal by adjusting the position of the X-ray tube and the hyperbolic crystal on the Rowland circle, and the X-ray detector collects single wavelength excitation of the element to be measured reflected in the sample, and selects the optimal single wavelength excitation data from the adopted data.

[0019] As a preferred embodiment, the controller adjusts the position of the X-ray tube and at the same time adjusts the excitation voltage of the X-ray tube so that the wavelength corresponding to the maximum intensity of the primary spectrum of the X-ray tube is equal to or slightly less than the absorption limit wavelength to obtain maximum excitation efficiency.

[0020] As a preferred embodiment, before the controller adjusts the position of the X-ray tube and the hyperbolic crystal, the X-ray detector collects data on the sample for the first time, then adjusts the excitation voltage of the X-ray tube, and the X-ray detector collects data on the sample for the second time. After completing the secondary data collection, the position of the hyperbolic crystal is adjusted again, and the X-ray detector collects data on the sample for the third time. After adjusting the position of the X-ray tube, the X-ray detector collects data on the sample for the fourth time, completing a set of cycles, and obtaining the optimal excitation single wavelength data after several sets of cycles.

[0021] After adopting the above technical solution, the beneficial effect of the present invention is that the system ensures efficient diffraction and precise positioning of X-rays by rationally arranging the X-ray tube, hyperbolic crystal and sample on the same horizontal plane and adopting the Rowland circle configuration method. This design optimizes the optical path, making the incident and diffraction process of X-rays smoother, thereby improving the precision and accuracy of the measurement.

[0022] By setting auxiliary moving lines, the system can flexibly adjust the position of the X-ray tube and the hyperbolic crystal. This feature enables the instrument to quickly adapt and adjust under various samples and measurement conditions, greatly improving the instrument's ease of operation and user-friendliness. Users can easily adjust the position of the device according to different experimental requirements to achieve the best measurement results.

[0023] In terms of data acquisition and processing, the system uses advanced X-ray detectors that can efficiently collect X-ray signals reflected by samples. The collected signals are amplified by preamplifiers to ensure the effective capture of weak signals and improve the sensitivity and detection capabilities of the system. In addition, the use of multi-channel analyzers for wavelength analysis enables the instrument to obtain more accurate composition information when processing complex samples. This wavelength analysis capability makes the system more widely and deeply applied in fields such as materials science, geology, and environmental monitoring.

[0024] The present invention obtains a changing X-ray energy spectrum by adjusting the excitation voltage of the X-ray tube, and obtains the maximum excitation efficiency by making the energy corresponding to the maximum intensity of the energy spectrum equal to or slightly greater than the critical excitation energy of the element to be measured; and then reduces the interference of non-target element signals and eliminates the continuous spectrum background scattering by designing a single-wavelength optical path structure, greatly improving the sensitivity of the single-wavelength energy-dispersive X-ray fluorescence instrument and increasing the peak-to-background ratio.

[0025] After the data processor processes the signal for the second time, the result can be displayed instantly on the display, providing intuitive feedback. This real-time data display function not only facilitates the user to quickly analyze and judge the experimental results, but also improves the efficiency and operability of the experiment. Users can quickly obtain the required information for further analysis and decision-making, which enhances the flexibility and practicality of the overall experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 This is a connection block diagram of the system of the present invention.

[0028] Figure 2 This is a schematic diagram of the structure of the annular slide rail of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the slide rail movable frame of the present invention.

[0030] 1-X-ray light tube, 2-hyperbolic bent crystal, 3-sample, 4-controller, 5-X-ray detector, 6-annular slide rail, 61-slide rail mobile rack. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example:

[0033] like Figures 1 to 3As shown, a variable modulation portable single-wavelength energy dispersive X-ray fluorescence instrument system includes an X-ray tube 1, a hyperbolic crystal 2 and a sample 3 arranged on the same horizontal plane, the X-ray tube 1, the hyperbolic crystal 2 and the sample 3 are distributed on the horizontal plane according to the Rowland circle position, and a ring guide 6 is arranged according to the Rowland circle structure, the position of the X-ray tube 1 and the hyperbolic crystal 2 is adjusted by a controller 4, the X-ray tube 1 incidents the X-ray to the position of the hyperbolic crystal 2, the X-ray is diffracted onto the sample 3 by the hyperbolic crystal 2, the X-ray reflected by the sample 3 is collected by the X-ray detector 5, and then the collected data is amplified by the preamplifier, and then the amplified model is subjected to wavelength analysis by a multi-channel analyzer, the wavelength analyzed data is imported into the data processor for secondary processing, and then the processed data is displayed by the display.

[0034] The basic components of the system include an X-ray tube, a hyperbolic crystal, a sample, an X-ray detector, a preamplifier, a multi-channel analyzer, a data processor, and a display. The working principle of the system is based on X-ray fluorescence analysis technology and is mainly used for the analysis of material composition. In this system, the X-ray tube 1 is the core component that emits X-rays, which generates high-energy X-rays through high voltage excitation. These X-rays will be incident on the hyperbolic crystal 2 at a certain angle. The function of the hyperbolic crystal is to diffract the incident X-rays and change their propagation direction so that they can accurately irradiate the surface of the sample 3.

[0035] During the installation process, the X-ray tube 1, the hyperbolic crystal 2 and the sample 3 need to be placed on the same horizontal plane and laid out according to the geometric position of the Rowland circle. The Rowland circle is a special geometric configuration that ensures the best diffraction angle between the X-ray tube and the detector, thereby improving the accuracy and sensitivity of the measurement. During installation, pay attention to the distance and angle between the devices to ensure that the optical path of the system is clear and free of interference.

[0036] The controller 4 of the system is responsible for adjusting the moving position of the X-ray tube 1 and the hyperbolic bent crystal 2. Through the instructions of the controller, the operator can accurately control the position of the tube and the bent crystal to ensure that the X-rays can be incident on the sample 3 at the best angle. After the sample 3 is irradiated, the elements in the sample will emit characteristic X-rays due to the excitation of the X-rays, and these characteristic X-rays contain information about the composition of the sample.

[0037] The X-ray detector 5 collects the X-rays reflected by the sample. The sensitivity and resolution of the detector directly affect the quality of the signal and the accuracy of the analysis. The collected signal will be sent to the preamplifier for signal amplification to increase the signal strength and ensure the accuracy of subsequent analysis. The design of the preamplifier usually takes noise control into consideration to reduce the noise interference that may be introduced during the signal amplification process.

[0038] The amplified signal is then analyzed by wavelength using a multichannel analyzer. The multichannel analyzer can separate X-ray signals of different wavelengths, allowing the system to identify the characteristic X-rays of each element in the sample and determine their concentration. After wavelength analysis, the data is imported into the data processor for further secondary processing. The data processor will perform algorithmic processing on the analysis results to extract useful information and record the data.

[0039] The processed data will be displayed in real time on the monitor, and the user can clearly see the concentration and distribution of each element. The entire process from X-ray emission to data processing and display forms a closed loop, and the user can make corresponding adjustments and optimizations through system feedback.

[0040] In actual applications, operators need to perform regular calibration and maintenance to ensure the accuracy and stability of the equipment. In addition, users need to follow relevant safety regulations when using the system to ensure the safe management of X-rays.

[0041] Two slide rail moving frames are installed on the annular guide rail, and X-ray tubes and samples are installed on the slide rail moving frames respectively. The motors on the slide rail moving frames are controlled by a controller to move, and the slide rail moving frames are operated to move on the annular guide rail.

[0042] The X-ray tube 1 and the hyperbolic bent crystal 2 diffract the X-rays through the bent crystal onto the sample 3 according to the Rowland circle principle, and the optical path structure is designed according to the following formula:

[0043] nλ=2dsinθ;

[0044] Where d is the interplanar spacing, θ is the angle between the incident X-ray and the corresponding crystal plane, λ is the wavelength of the X-ray, and n is the diffraction order.

[0045] The most common geometry for diffraction in curved crystals is based on the Rowland circle principle, which relies on the well-known property of a circle that the arc segments at any point on the circle subtend a constant angle. The optical path is designed based on this principle.

[0046] According to Bragg's law: nλ=2dsinθ, when the bent crystal remains unchanged, that is, d remains unchanged, different diffraction wavelengths can be obtained by changing θ to excite the sample.

[0047] The present invention designs the optical path structure based on the Rowland circle, and changes the diffraction angle of the bent crystal by adjusting the positions of the X-ray tube and the multilayer film hyperbolic bent crystal on the Rowland circle, thereby obtaining the optimal excitation single wavelength (absorption limit wavelength) for each element to be measured. At the same time, by adjusting the excitation voltage of the X-ray tube, the wavelength corresponding to the maximum intensity of the primary spectrum of the X-ray tube is equal to or slightly less than the absorption limit wavelength, thereby obtaining the maximum excitation efficiency.

[0048] When designing the optical path structure, by adjusting the crystal plane spacing and the angle between the incident X-ray and the corresponding crystal plane, the signal interference of non-target elements is reduced, the continuous spectrum background scattering is eliminated, the sensitivity of the single-wavelength energy-dispersive X-ray fluorescence instrument is improved, and the peak-to-background ratio is increased.

[0049] When designing the optical path structure, the key design idea is to adjust the crystal plane spacing and the angle between the incident X-ray and the corresponding crystal plane to optimize the performance of the single-wavelength energy-dispersive X-ray fluorescence instrument. The core of this design idea is to reduce the signal interference of non-target elements and eliminate background scattering by accurately controlling the geometric parameters of the optical path, thereby significantly improving the sensitivity of the instrument and the accuracy of the analysis results.

[0050] Adjustment of the interplanar spacing has a direct impact on the diffraction effect of X-rays. According to Bragg's law, there is a clear relationship between the diffraction angle, the incident wavelength and the interplanar spacing. By optimizing the interplanar spacing, selective diffraction of X-rays of a specific wavelength can be achieved, so that only the characteristic signal of the target element can be effectively captured by the detector, while the signals emitted by other non-target elements will be effectively suppressed due to the failure to meet the diffraction conditions. This selectivity not only reduces the interference of non-target elements, but also improves the system's responsiveness to the target element signals, thereby improving the peak-to-background ratio, that is, the ratio between signal intensity and background noise.

[0051] In addition, adjusting the angle between the incident X-ray and the corresponding crystal plane is also an effective optimization strategy. By fine-tuning the angle, the incident X-ray can interact more effectively with the target element in the sample and enhance the generation of its characteristic signal. At the same time, this adjustment can also reduce the continuous spectrum background noise caused by scattering to a certain extent. In this way, the system can clearly identify the fluorescence signal of the target element in a complex background environment, further improving the sensitivity of the system.

[0052] Compared with existing technologies, this design idea is mainly reflected in several aspects of innovation. Traditional X-ray fluorescence instruments are usually fixed in optical path design and lack flexible adjustment capabilities. By introducing adjustable crystal plane spacing and incident angle, designers can dynamically optimize the optical path according to the characteristics of the sample and analysis requirements, which allows the instrument to maintain high sensitivity and accuracy under different experimental conditions.

[0053] Existing technologies often find it difficult to effectively suppress background interference from non-target elements, which affects the accuracy of the analysis results. However, through the application of the above-mentioned design ideas, the interference of non-target element signals can be reduced at the source, thereby achieving more accurate analysis results. With the development of materials science and analytical technology, the demand for analysis of sample components is increasing, and the requirements for the sensitivity and accuracy of instruments are also getting higher and higher. The design idea of ​​adjusting the crystal plane spacing and the incident angle not only improves the performance of the single-wavelength energy-dispersive X-ray fluorescence instrument, but also provides new ideas and directions for the development of related technologies in the future.

[0054] The controller 4 changes the diffraction angle of the hyperbolic crystal by adjusting the positions of the X-ray tube 1 and the hyperbolic crystal 2 on the Rowland circle. The X-ray detector 5 collects the single wavelength of the element to be measured reflected in the sample 3 and selects the optimal single wavelength data from the adopted data.

[0055] The core idea of ​​this design is to achieve efficient excitation and accurate detection of the elements to be tested in the sample by precisely controlling the position of the X-ray tube and the hyperbolic bent crystal. This process mainly involves adjusting the diffraction angle of the bent crystal to optimize the incident and detection angles of the X-rays, thereby improving the excitation efficiency of the elements in the sample and the intensity of the detection signal. Compared with traditional X-ray detection technology, existing technologies often use fixed tube and detector positions, resulting in limited excitation efficiency and signal intensity, making it difficult to achieve comprehensive analysis of complex samples.

[0056] In this design, the positions of the X-ray tube 1 and the hyperbolic crystal 2 are dynamically adjusted by the controller 4, which enables a more flexible experimental setup. This flexibility enables the system to adjust the relative positions of the tube and the crystal in real time according to the different characteristics of the sample and the requirements of the elements to be measured to obtain the best diffraction angle. This adjustment not only improves the excitation effect of X-rays of different wavelengths, but also significantly enhances the detector 5's ability to collect reflected signals from the sample 3. In this way, the system can select the best data from multiple excitation single wavelengths, thereby maximizing the accuracy and sensitivity of the analysis.

[0057] Compared with the existing technology, this design achieves higher flexibility and efficiency through optimized optical paths and detection settings. In traditional technology, the positions of X-ray tubes and detectors are often fixed, which cannot adapt to changes in sample characteristics, resulting in low efficiency of single wavelength excitation. In addition, detectors in the existing technology usually only work at specific wavelengths and lack adaptability to excitation of different elements, limiting their application scope in complex sample analysis. This design can quickly adapt to the needs of different samples through intelligent adjustment, while ensuring that high-quality detection data can be obtained under a variety of excitation conditions.

[0058] By adopting a dynamic optimization algorithm, the controller 4 can analyze the reflection signal of the sample in real time and quickly adjust the position of the light pipe and the bent crystal based on the characteristics of these signals. This adaptive adjustment mechanism can effectively reduce human intervention in the experiment and improve the automation and reproducibility of the experiment. This is in sharp contrast to traditional technologies, which often rely on the experience and manual adjustments of the experimenter, which easily lead to unstable and non-repeatable results.

[0059] The controller 4 adjusts the position of the X-ray tube 1 and the excitation voltage of the X-ray tube 1 at the same time, so that the wavelength corresponding to the maximum intensity of the primary spectrum of the X-ray tube 1 is equal to or slightly less than the absorption limit wavelength, thereby obtaining the maximum excitation efficiency.

[0060] The controller 4 not only adjusts the physical position of the X-ray tube, but also ensures that the wavelength of the generated X-rays matches or is slightly lower than the absorption limit wavelength of the sample by adjusting its excitation voltage. This design aims to maximize the sample's absorption of X-rays, thereby improving the sensitivity and accuracy of the analysis. The core idea of ​​this design is to optimize the excitation efficiency of X-rays by precisely controlling the position and excitation voltage of the X-ray tube, ensuring that the signal intensity and detection accuracy can be maximized when analyzing the sample. Specifically, by adjusting the excitation voltage of the X-ray tube to correspond to or be slightly lower than the absorption limit wavelength of the element to be measured in the sample, the system can effectively excite the target element in the sample, thereby achieving optimal capture of its characteristic signal.

[0061] In X-ray analysis, the excitation voltage has a direct impact on the wavelength and intensity of the generated X-rays. A higher excitation voltage generally results in higher energy X-rays, which in turn results in a shorter wavelength. By adjusting the excitation voltage to a value close to the absorption limit wavelength of the element to be measured, it is ensured that the emitted X-rays can be effectively absorbed and excited by the target element, thereby enhancing the signal intensity. This design concept aims to maximize the excitation efficiency of the sample through precise adjustment to ensure the accuracy of the analysis results.

[0062] In addition, the reason for setting the excitation voltage to be slightly less than the absorption limit wavelength is that the absorption limit wavelength refers to the minimum wavelength that the sample material can effectively absorb. In practical applications, if the excitation voltage is too high, it may cause unnecessary increase in background noise or even damage or change to the sample. Therefore, keeping the excitation voltage within a reasonable range can not only optimize the excitation efficiency, but also protect the sample and ensure stable and reliable data during the analysis process.

[0063] By combining the adjustment of the excitation voltage with the change of the X-ray tube position, the controller 4 can achieve a more flexible and dynamic experimental setting. This dual adjustment can quickly adapt to the changes in the characteristics of the sample under different experimental conditions. Whether it is the shape, material or composition of the sample, the best test conditions can be obtained through corresponding adjustments. This is often difficult to achieve in traditional technologies because existing methods usually only focus on a single dimension of the tube position or the excitation voltage, lack overall coordination, and result in unsatisfactory excitation efficiency and signal capture effects.

[0064] As a preferred embodiment, before the controller 4 adjusts the position of the X-ray tube 1 and the hyperbolic crystal 2, the X-ray detector 5 performs the first data acquisition on the sample 3, then adjusts the excitation voltage of the X-ray tube 1, and the X-ray detector 5 performs the secondary data acquisition on the sample 3. After completing the secondary data acquisition, the position of the hyperbolic crystal 2 is adjusted again, and the X-ray detector 5 performs the third data acquisition on the sample 3. After adjusting the position of the X-ray tube 1, the X-ray detector 5 performs the fourth data acquisition on the sample 3 to complete a set of cycles. After several sets of cycles, the optimal excitation single wavelength data is obtained.

[0065] The controller 4 first performs the first data acquisition on the X-ray detector 5, with the purpose of obtaining the initial signal of the sample 3 without any parameter adjustment. This preliminary data can not only provide information on the sample's response under the current excitation conditions, but also provide a baseline reference for subsequent adjustments. This baseline data is crucial for subsequent comparison and analysis, as it provides a basis for evaluating the effectiveness and necessity of subsequent adjustments.

[0066] After the first data acquisition, the controller 4 adjusts the excitation voltage of the X-ray tube 1. This step is intended to optimize the excitation conditions in order to achieve higher signal intensity and better excitation effect. After adjusting the excitation voltage, the X-ray detector 5 performs a secondary data acquisition on the sample 3 again to obtain the signal under the new excitation condition. The design intention of this process is to explore the influence of different excitation conditions on the sample response by adjusting the excitation voltage, so as to provide empirical data for the subsequent selection of the best excitation conditions.

[0067] After completing the secondary data collection, the controller 4 then adjusts the position of the hyperbolic crystal 2 and uses the X-ray detector 5 to collect data for the third time. The adjustment at this stage is mainly to further enhance the detection efficiency of the sample by optimizing the incident angle and diffraction angle of the X-ray. By accurately adjusting the position of the hyperbolic crystal, the system can achieve better diffraction effect, thereby improving the strength and quality of the signal. The significance of collecting data again is to evaluate the impact of the adjustment of the hyperbolic crystal position on the sample signal and provide feedback for subsequent optimization.

[0068] The controller 4 will also adjust the position of the X-ray tube 1 to complete the fourth data collection and further improve the sample analysis process. Through this series of adjustments and collections, the system can explore the characteristics of the sample in multiple dimensions to ensure that the acquired data is based on the best experimental conditions. This design of multiple collections and adjustments can minimize the deviation in the experiment and improve the reliability and accuracy of the data.

[0069] Through multiple cycles, the system can not only collect a large amount of data, but also conduct comparative analysis. This cyclic collection mechanism allows each adjustment to be evaluated and optimized based on the previous one, forming a continuous iterative process. By comparing the data from each time, the system can identify the data for the optimal excitation single wavelength, thereby ensuring that the best results can be obtained in actual analysis. This method is completely different from the traditional single-shot collection and fixed parameter setting approach, which can often only obtain local optimal solutions and it is difficult to achieve comprehensive optimization effects.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable single-wavelength energy-dispersive X-ray fluorescence instrument system with variable modulation, It is characterized in that The invention comprises an X-ray tube (1), a hyperbolic crystal (2) and a sample (3) arranged on the same horizontal plane, the X-ray tube (1), the hyperbolic crystal (2) and the sample (3) are distributed on the horizontal plane according to the position of the Rowland circle, and a circular guide rail (6) is arranged according to the Rowland circle structure, the position of the X-ray tube (1) and the hyperbolic crystal (2) are adjusted by a controller (4), the X-ray tube (1) injects X-rays into the position of the hyperbolic crystal (2), the X-rays are diffracted onto the sample (3) by the hyperbolic crystal (2), the X-rays reflected by the sample (3) are collected by an X-ray detector (5), the collected data are then amplified by a preamplifier, the amplified data are then subjected to wavelength analysis by a multi-channel analyzer, the data subjected to wavelength analysis are imported into a data processor for secondary processing, and the processed data are then displayed by a display.

2. A portable single-wavelength energy-dispersive X-ray fluorescence instrument system with variable modulation, It is characterized in that Two slide rail moving frames (61) are installed on the circular guide rail (6), and an X-ray tube (1) and a sample (3) are installed on the slide rail moving frames (61) respectively. The motor on the slide rail moving frame (61) is controlled by a controller (4) to move, and the slide rail moving frame (61) is operated to move on the circular guide rail (6).

3. A portable single-wavelength energy dispersive X-ray fluorescence instrument system with variable modulation as claimed in claim 1, Features: The X-ray tube (1) and the hyperbolic curved crystal (2) diffract the X-rays through the curved crystal onto the sample (3) according to the Rowland circle principle, and the optical path structure is designed according to the following formula: nλ=2dsinθ; Where d is the interplanar spacing, θ is the angle between the incident X-ray and the corresponding crystal plane, λ is the wavelength of the X-ray, and n is the diffraction order.

4. A portable single-wavelength energy dispersive X-ray fluorescence instrument system with variable modulation as claimed in claim 1, Features: When designing the optical path structure, by adjusting the crystal plane spacing and the angle between the incident X-ray and the corresponding crystal plane, the signal interference of non-target elements is reduced, the continuous spectrum background scattering is eliminated, the sensitivity of the single-wavelength energy-dispersive X-ray fluorescence instrument is improved, and the peak-to-background ratio is increased.

5. A portable single-wavelength energy dispersive X-ray fluorescence instrument system with variable modulation as claimed in claim 1, Features: The controller (4) changes the bent crystal diffraction angle by adjusting the positions of the X-ray tube (1) and the hyperbolic bent crystal (2) on the Rowland circle, and the X-ray detector (5) collects the single wavelength of the element to be measured reflected in the sample (3) and selects the optimal single wavelength data from the adopted data.

6. A portable single-wavelength energy dispersive X-ray fluorescence instrument system with variable modulation as claimed in claim 5, Features: The controller (4) adjusts the position of the X-ray tube (1) and at the same time adjusts the excitation voltage of the X-ray tube (1) so that the wavelength corresponding to the maximum intensity of the primary spectrum of the X-ray tube (1) is equal to or slightly less than the absorption limit wavelength, thereby obtaining the maximum excitation efficiency.

7. A portable single-wavelength energy dispersive X-ray fluorescence instrument system with variable modulation as claimed in claim 6, Features: Before the controller (4) adjusts the position of the X-ray tube (1) and the hyperbolic crystal (2), the X-ray detector (5) collects data on the sample (3) for the first time, then adjusts the excitation voltage of the X-ray tube (1), and the X-ray detector (5) collects data on the sample (3) for the second time. After the second data collection is completed, the position of the hyperbolic crystal (2) is adjusted, and the X-ray detector (5) collects data on the sample (3) for the third time. After adjusting the position of the X-ray tube (1), the X-ray detector (5) collects data on the sample (3) for the fourth time, completing a set of cycles, and obtaining optimal excitation single wavelength data after several sets of cycles.

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