Powder detection method, system, device, storage medium and program product

Abstract

The present application relates to a powder material detection method, system, device, storage medium, and program product. The method includes: determining a reference movement speed of a loading mechanism based on a signal coverage range of an electromagnetic wave generator and a preset movement time of the powder material to be detected within the signal coverage range; controlling the loading mechanism for carrying the powder material to be detected to move at the reference movement speed; controlling the electromagnetic wave generator to emit an electromagnetic wave signal to the powder material to be detected at a position where the powder material to be detected reaches the electromagnetic wave generator on the loading mechanism; and obtaining an infrared signal generated by the powder material to be detected and received by the infrared detector at a position where the powder material to be detected reaches an infrared detector on the loading mechanism, so as to determine a detection result of metal particles in the powder material to be detected based on the infrared signal; the electromagnetic wave signal is used to heat the metal particles in the powder material to be detected; in the above method, the detection sensitivity is improved, and the risk of missed detection and false detection is correspondingly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery powder detection, and in particular to a powder detection method, system, device, storage medium and program product. Background Art

[0002] During the battery manufacturing process, the quality of the powder used to make electrodes will affect battery performance. For example, if metal particles (such as iron, copper, nickel, etc.) are mixed into the powder, it may cause internal short circuit or thermal runaway in the battery, thereby causing destructive effects on the battery.

[0003] In related technologies, high-energy laser ablation of powder is used, and the plasma emission spectrum is analyzed to determine the metal particles in the powder, or magnetic separation is used to separate magnetic metal particles such as iron and nickel by magnetic adsorption, thereby realizing the detection of metal particles in the powder.

[0004] However, the detection sensitivity of metal particles in powder materials in related technologies is low, resulting in a high risk of missed detection and false detection. Summary of the Invention

[0005] Based on this, it is necessary to provide a powder detection method, system, device, storage medium and program product to address the above technical problems.

[0006] In a first aspect, embodiments of the present application provide a powder detection method, which is applied to a controller in a powder detection system. The powder detection system includes an electromagnetic wave generator, an infrared detector, and a loading mechanism connected to the controller. The electromagnetic wave generator and the infrared detector are both disposed toward the loading mechanism. The method includes:

[0007] According to the signal coverage range of the electromagnetic wave generator and the preset movement time of the powder to be inspected within the signal coverage range, the reference movement speed of the loading mechanism is determined, and the loading mechanism is controlled to move according to the reference movement speed; the loading mechanism is used to carry the powder to be inspected;

[0008] When the powder material to be inspected reaches the position of the electromagnetic wave generator on the loading mechanism, the electromagnetic wave generator is controlled to emit an electromagnetic wave signal to the powder material to be inspected; the electromagnetic wave signal is used to heat the metal particles in the powder material to be inspected;

[0009] When the powder material to be inspected reaches the position of the infrared detector on the loading mechanism, the infrared detector obtains the infrared signal generated by the powder material to be inspected;

[0010] The detection result of metal particles in the powder to be tested is determined based on the infrared signal.

[0011] In an embodiment of the present application, the loading mechanism is controlled to move to transmit the powder to be tested, which first passes through an electromagnetic wave generator, radiates electromagnetic wave signals on the powder to be tested through the electromagnetic wave generator, and then passes through an external infrared detector, and the infrared detector obtains the infrared signal generated by the powder to be tested, and determines the detection result of the metal particles in the powder to be tested based on the obtained infrared signal. The obtained infrared signal can be used to reflect the thermal sensitivity difference between the metal particles and other components in the powder to be tested under the action of the electromagnetic wave signal. The metal particles are sensitive to the electromagnetic wave signal, and a significant thermal sensitivity difference is generated between other components under the action of the electromagnetic wave signal. The significant thermal sensitivity difference is used to detect the metal particles in the powder, thereby improving the detection sensitivity and correspondingly reducing the risk of missed detection and false detection.

[0012] In one embodiment, determining the detection result of metal particles in the powder to be tested based on the infrared signal includes:

[0013] Determine the temperature distribution diagram of the powder to be tested based on the infrared signal; the temperature distribution diagram includes the temperature of different positions in the powder to be tested;

[0014] The detection results of metal particles in the powder to be tested are determined based on the temperature distribution diagram.

[0015] In the embodiment of the present application, the temperature distribution map of the powder to be tested is determined according to the infrared signal, and then the detection results of the metal particles in the powder to be tested are determined based on the temperature distribution map. The process of determining the temperature distribution map according to the infrared signal is simple and easy to implement in a program, which can improve the detection efficiency. In addition, the temperature distribution map can accurately reflect the temperature distribution of the powder to be tested, which is helpful for the subsequent determination of whether there are metal particles with obvious thermal sensitivity differences between the powder to be tested and other components, thereby simultaneously improving the detection reliability.

[0016] In one embodiment, determining the detection result of metal particles in the powder to be tested based on the temperature distribution diagram includes:

[0017] When an abnormal area exists in the temperature distribution diagram, the detection result is determined to be the presence of metal particles in the powder to be tested; the abnormal area refers to an area formed by position points where the temperature is higher than the temperature threshold;

[0018] When there is no abnormal area in the temperature distribution diagram, it is determined that the detection result is that no metal particles are present in the powder to be tested.

[0019] In the embodiment of the present application, the presence of abnormal areas in the temperature distribution map is determined based on temperature comparison, and the detection results are then determined. There is no need to perform complex analysis and processing on the temperature distribution map, which simplifies the process of determining the detection results and can correspondingly improve the detection efficiency.

[0020] In one embodiment, the method further includes:

[0021] When the test result indicates that metal particles are present in the powder to be tested, the number and / or size of abnormal areas are determined based on the temperature distribution map;

[0022] The number and / or size of the abnormal areas are determined as the metal particle information of the powder to be tested.

[0023] In an embodiment of the present application, when detecting the presence of metal particles, the number and / or size of abnormal areas are determined based on the temperature distribution map as metal particle information. On the basis of detecting the presence of metal particles, more dimensional information including the number and / or size of metal particles in the powder to be tested is further obtained, thereby improving the richness of detection.

[0024] In one embodiment, the method further includes:

[0025] Adjusting the operating parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism according to the detection results;

[0026] Based on the adjusted working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism, the metal particles of the powder to be tested carried by the loading mechanism are detected.

[0027] In the embodiment of the present application, feedback adjustment is performed on the operating parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism in the powder detection system based on the detection results to improve the detection results, thereby improving the reliability and accuracy of the detection results.

[0028] In one embodiment, the operating parameters of the electromagnetic wave generator include output power; and adjusting the operating parameters of the electromagnetic wave generator according to the detection result includes:

[0029] When the test result shows that metal particles exist in the powder to be tested, the output power is kept unchanged;

[0030] When the detection result shows that no metal particles exist in the powder to be detected, the output power is increased.

[0031] In an embodiment of the present application, the output power of the electromagnetic wave generator is adjusted differently based on different detection results, so that when metal particles are detected, the output power is kept unchanged to reduce unnecessary power consumption. When no metal particles are detected, the output power is increased to promote the subsequent heating of metal particles in the powder to be tested, reduce missed detections caused by insufficient output power of the electromagnetic wave generator, and thus improve the comprehensiveness and accuracy of detection.

[0032] In one embodiment, adjusting the moving speed of the loading mechanism according to the detection result includes:

[0033] When the test result shows that metal particles exist in the powder to be tested, the moving speed is kept unchanged;

[0034] When the detection result shows that no metal particles exist in the powder to be tested, the moving speed of the loading mechanism is adjusted according to the movement time of the powder to be tested within the signal coverage range of the electromagnetic wave generator.

[0035] In one embodiment, adjusting the moving speed of the loading mechanism according to the movement time of the powder to be inspected within the signal coverage range of the electromagnetic wave generator includes:

[0036] Determine the reference duration based on the moving duration; the reference duration is greater than the moving duration;

[0037] Determine the target moving speed based on the reference duration and signal coverage;

[0038] Control the loading mechanism to move according to the target moving speed.

[0039] In an embodiment of the present application, the moving speed of the loading mechanism is adjusted differently based on different detection results, so that when metal particles are detected, the moving speed is kept unchanged to reduce unnecessary power consumption, and when no metal particles are detected, the moving speed is reduced to increase the movement time of the powder to be tested within the signal coverage range of the electromagnetic wave generator, so that the metal particles in the powder to be tested are significantly heated after being fully irradiated by the electromagnetic wave signal, reducing missed detection caused by the short movement time of the powder to be tested within the signal coverage range of the electromagnetic wave generator, thereby improving the comprehensiveness and accuracy of the detection.

[0040] In the second aspect, an embodiment of the present application also provides a powder detection system, which includes: a controller, and an electromagnetic wave generator, an infrared detector and a loading mechanism connected to the controller; the electromagnetic wave generator and the infrared detector are both arranged toward the loading mechanism; the controller is used to implement the steps of any of the above-mentioned powder detection methods.

[0041] In a third aspect, an embodiment of the present application further provides a powder material detection device, the device comprising:

[0042] The movement control module is used to determine the reference movement speed of the loading mechanism based on the signal coverage range of the electromagnetic wave generator and the preset movement time of the powder material to be tested within the signal coverage range, and control the loading mechanism to move at the reference movement speed; the loading mechanism is used to carry the powder material to be tested;

[0043] The electromagnetic control module is used to control the electromagnetic wave generator to emit electromagnetic wave signals to the powder to be tested when the powder to be tested reaches the position of the electromagnetic wave generator on the loading mechanism; the electromagnetic wave signal is used to heat the metal particles in the powder to be tested;

[0044] The infrared control module is used to obtain the infrared signal generated by the powder material to be inspected and received by the infrared detector when the powder material to be inspected reaches the position of the infrared detector on the loading mechanism;

[0045] The result determination module is used to determine the detection result of metal particles in the powder to be tested based on the infrared signal.

[0046] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of any of the above-mentioned powder material detection methods when the computer program is executed by a processor.

[0047] In a fifth aspect, an embodiment of the present application further provides a computer program product, comprising a computer program, which implements the steps of any of the above-mentioned powder material detection methods when executed by a processor.

[0048] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 Schematic diagram of a powder material detection system according to one embodiment;

[0050] Figure 2 Schematic diagram of a powder material detection method according to one embodiment;

[0051] Figure 3 A schematic diagram of a process for determining a test result in one embodiment;

[0052] Figure 4 A schematic diagram of a process for determining a detection result in another embodiment;

[0053] Figure 5 A schematic diagram of a process for determining metal particle information in one embodiment;

[0054] Figure 6 A schematic diagram of a process for adjusting an electromagnetic wave generator and / or a material loading mechanism in one embodiment;

[0055] Figure 7 A schematic diagram of a process for adjusting the output power of an electromagnetic wave generator in one embodiment;

[0056] Figure 8 A schematic diagram of a process for adjusting the moving speed of a loading mechanism in one embodiment;

[0057] Figure 9 A schematic diagram of a flow chart for adjusting the moving speed of a loading mechanism in another embodiment;

[0058] Figure 10 Schematic diagram of a powder material detection method according to another embodiment;

[0059] Figure 11 1 is a structural block diagram of a powder material detection device in one embodiment. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the term "include" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0062] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0063] In the description of the embodiments of this application, the term "and / or" is merely a description of an association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In the description of the embodiments of this application, the term "plurality" refers to two or more (including two), unless otherwise specifically defined.

[0064] During the battery manufacturing process, the quality of the powder used to make electrodes can affect battery performance. For example, the presence of metal particles (such as iron, copper, and nickel) in the powder can cause internal short circuits or thermal runaway, resulting in devastating battery damage. Therefore, powder testing is a crucial step in the battery manufacturing process.

[0065] Related technologies detect metal particles in powders by using high-energy lasers to ablate them and analyzing the plasma emission spectrum to identify metal particles. Alternatively, magnetic separation methods are used to separate magnetic metal particles such as iron and nickel through magnetic adsorption. However, high-energy laser ablation not only damages the powder, but the laser-induced emission spectrum of metal particles has low sensitivity for light metals (such as lithium and aluminum) and cannot detect metal particles within the coating. Magnetic separation methods are only suitable for magnetic metals such as iron and nickel and are ineffective for non-magnetic metals (such as copper and aluminum).

[0066] Therefore, the related art has great limitations in detecting metal particles in powder materials, resulting in low detection sensitivity and a high risk of missed detection and false detection.

[0067] The powder material detection method provided in the embodiment of the present application can be applied to Figure 1 The powder material detection system 100 includes a controller 101, an electromagnetic wave generator 102, an infrared detector 103 and a material loading mechanism 104 connected to the controller 101. The electromagnetic wave generator 102 and the infrared detector 103 are both arranged toward the material loading mechanism 104.

[0068] Among them, the controller 101 is respectively communicated with the electromagnetic wave generator 102, the infrared detector 103 and the loading mechanism 104, and is used to control the working status of the electromagnetic wave generator 102 / infrared detector 103 / loading mechanism 104, such as turning on or off the electromagnetic wave generator 102 / infrared detector 103 / loading mechanism 104, adjusting the working parameters of the electromagnetic wave generator 102 / infrared detector 103 / loading mechanism 104, etc.

[0069] The electromagnetic wave generator 102 is used to generate and transmit electromagnetic wave signals. Exemplarily, these electromagnetic wave signals are high-frequency electromagnetic waves, i.e., microwaves. The infrared detector 103 is used to sense and collect infrared signals from the environment. The loading mechanism 104 includes a supporting portion and a driving portion. The supporting portion is used to support the powder to be tested, and the driving portion is used to drive the supporting portion to move the powder to be tested.

[0070] For example, Figure 1 As shown, the loading mechanism 104 can carry and drive the powder material to be tested to move along its own orientation. The electromagnetic wave generator 102 and the infrared detector 103 are arranged side by side and both face the loading mechanism 104 to respectively irradiate the powder material to be tested carried by the loading mechanism 104 with electromagnetic wave signals and collect infrared signals generated by the powder material to be tested. In the direction of movement of the powder material to be tested, the powder material to be tested first passes through the electromagnetic wave generator 102 and then passes through the infrared detector 103.

[0071] In one embodiment, the present application provides a powder detection method, such as Figure 2 As shown, this method is applied to Figure 1 Taking the controller in as an example, the following steps are included:

[0072] S210. Determine a reference moving speed of the loading mechanism based on the signal coverage of the electromagnetic wave generator and a preset movement time of the powder to be inspected within the signal coverage, and control the loading mechanism to move according to the reference moving speed; the loading mechanism is used to carry the powder to be inspected.

[0073] The powder material to be tested is a powdered material to be tested. For example, in the field of battery manufacturing technology, the powder material to be tested is battery powder used to make electrodes, such as positive electrode powder or negative electrode powder. The loading mechanism includes a supporting portion and a driving portion. The supporting portion is used to support the powder material to be tested, and the driving portion is used to drive the supporting portion to move, thereby driving the powder material to be tested.

[0074] The electromagnetic wave generator's signal coverage range can be represented by the electromagnetic wave generator's coverage width in the direction of the powder's movement. The preset duration of time the powder is moving within the signal coverage range can be customized based on user needs. The longer the movement duration, the longer the powder is exposed to the electromagnetic wave signal.

[0075] Optionally, the controller can receive the coverage width of the electromagnetic wave generator and the preset movement time input by the user, and use the coverage width as the movement distance of the loading mechanism, and use the movement time as the movement time of the loading mechanism to determine the movement speed of the loading mechanism as a reference movement speed. After the powder to be tested is placed on the loading part, the controller can drive the carrying part to move through the driving part, and adjust the movement speed of the loading mechanism to the reference movement speed to control the loading mechanism to move according to the reference movement speed.

[0076] For example, taking the coverage width L of the electromagnetic wave generator and the preset movement time T as an example, the reference movement speed V of the loading mechanism is V=L / T.

[0077] It should be noted that the moving speed of the loading mechanism is determined based on the signal coverage range of the electromagnetic wave generator and the preset movement time of the powder to be tested within the signal coverage range, so as to control the movement of the loading mechanism so that the powder to be tested moves within the signal coverage range to meet the required radiation time, thereby improving the radiation effect, allowing the metal particles in the powder to be tested to fully heat up, and improving the accuracy of the detection results.

[0078] Exemplarily, the powder detection system also includes a gravity sensor arranged at the bottom of the load-bearing part, which is communicatively connected to the controller. When the gravity sensor detects gravity data, the controller can determine that the powder to be tested has been placed in the load-bearing part, and then execute the step of controlling the movement of the load-bearing mechanism.

[0079] S220 , when the powder material to be inspected reaches the position of the electromagnetic wave generator on the loading mechanism, the electromagnetic wave generator is controlled to transmit an electromagnetic wave signal to the powder material to be inspected; the electromagnetic wave signal is used to heat the metal particles in the powder material to be inspected.

[0080] The metal particles in the powder to be inspected are typically metal particles that have been mixed into the powder to be inspected and are foreign matter that needs to be removed. The electromagnetic wave generator can radiate electromagnetic wave signals externally through an internal antenna. For example, the antenna can be a horn antenna or a microstrip patch antenna.

[0081] It should be noted that the response characteristics of other components in the powder to be tested and the metal particles to electromagnetic wave signals are different. Metal particles will produce a "skin effect" under the action of electromagnetic wave signals, that is, the signal energy is mainly concentrated on the surface of the metal particles, resulting in eddy currents on the surface. These eddy currents will be quickly converted into heat, thereby causing the temperature of the metal particles to rise rapidly, while the temperature of other components in the powder to be tested changes less, causing the metal particles in the powder to be tested to show significant thermal sensitivity differences from other components. This application utilizes this thermal sensitivity difference to detect metal particles in the powder to be tested. Moreover, even if the particle size of the metal particles is very small, it can also show significant thermal sensitivity differences, thereby improving the detection sensitivity and enabling the detection of metal particles with a particle size of ≥50μm.

[0082] Optionally, the controller can determine whether the powder to be inspected on the loading mechanism has reached the position of the electromagnetic wave generator. If it is determined that the powder has reached the position of the electromagnetic wave generator, the controller can cause the electromagnetic wave generator to emit an electromagnetic wave signal according to preset parameters toward the powder to be inspected. The preset parameters may include the output power of the electromagnetic wave generator and the frequency band of the electromagnetic wave signal. The frequency band of the electromagnetic wave signal matches the metal type of the metal particles.

[0083] Optionally, the controller can form a closed-loop feedback with the electromagnetic wave generator through a voltage-controlled oscillator (VCO), and apply a tuning voltage to the VCO according to the resonance characteristics of the metal particles to be detected (such as metal iron Fe / copper Cu), so that the frequency band of the electromagnetic wave signal output by the electromagnetic wave generator matches the electromagnetic response frequency of the metal particles to be detected.

[0084] For example, to determine whether the powder to be tested on the loading mechanism has reached the position of the electromagnetic wave generator, the controller may start timing after determining that the powder to be tested is placed on the loading portion, and when the timing reaches a first preset time, determine that the powder to be tested on the loading mechanism has reached the position of the electromagnetic wave generator, otherwise it has not reached. The first preset time t1 is determined based on the moving speed v of the loading portion and the vertical distance L1 between the starting point of the loading portion and the electromagnetic wave generator, such as t1=L1 / v. The powder detection system may also include a camera arranged at the position of the electromagnetic wave generator, the camera being communicatively connected to the controller, and the controller may determine that the powder to be tested has reached the position of the electromagnetic wave generator when the image captured by the camera includes the powder to be tested; otherwise, when the image does not include the powder to be tested, determine that the powder to be tested has not reached the position of the electromagnetic wave generator.

[0085] S230 , when the powder material to be inspected reaches the position of the infrared detector on the material loading mechanism, an infrared signal generated by the powder material to be inspected and received by the infrared detector is acquired.

[0086] The metal particles and other components in the powder to be tested all radiate infrared signals, but the intensity of the radiated infrared signals varies with the temperature and energy of the radiation. The higher the temperature, the greater the radiation energy and the greater the intensity of the radiated infrared signals.

[0087] Optionally, after the electromagnetic wave generator transmits an electromagnetic wave signal to the powder to be tested, the controller can determine whether the powder to be tested on the loading mechanism has reached the position of the infrared detector, and if it is determined that it has reached the position of the infrared detector, turn on the infrared detector to obtain the infrared signal generated by the powder to be tested and received by the infrared detector.

[0088] For example, to determine whether the powder to be inspected on the loading mechanism has reached the position of the infrared detector, similar to determining whether the powder to be inspected on the loading mechanism has reached the position of the electromagnetic wave generator, the controller may begin timing after determining that the powder to be inspected on the loading mechanism has reached the position of the infrared detector. If the timing reaches a second preset time, it is determined that the powder to be inspected on the loading mechanism has reached the position of the infrared detector; otherwise, it is determined that the powder to be inspected on the loading mechanism has not reached the position. The second preset time t2 is determined based on the movement speed v of the loading section and the vertical distance L2 between the starting point of the electromagnetic wave generator and the infrared detector, such as t2 = L2 / v. The powder detection system may also include a camera disposed at the position of the infrared detector, the camera being communicatively connected to the controller. If the image captured by the camera includes the powder to be inspected, the controller may determine that the powder to be inspected has reached the position of the infrared detector; otherwise, if the image does not include the powder to be inspected, the controller may determine that the powder to be inspected has not reached the position of the infrared detector.

[0089] S240: Determine the detection result of the metal particles in the powder to be tested according to the infrared signal.

[0090] Optionally, the controller may draw an infrared signal intensity distribution diagram of the powder to be inspected in the inspected area according to the signal intensity of the infrared signal obtained by the infrared detector, so as to determine the detection result of metal particles in the powder to be inspected according to the signal intensity of different position points in the infrared signal intensity distribution diagram.

[0091] Exemplarily, the position area in the infrared signal intensity distribution diagram where the signal intensity is greater than the preset intensity threshold is the metal particles in the powder to be tested. The controller can determine whether there is a position area in the infrared signal intensity distribution diagram where the signal intensity is greater than the preset intensity threshold, and if so, determine that the detection result of the metal particles in the powder to be tested is that metal particles exist; conversely, if not, determine that the detection result of the metal particles in the powder to be tested is that metal particles do not exist.

[0092] In the embodiment of the present application, the reference moving speed of the loading mechanism is determined according to the signal coverage range of the electromagnetic wave generator and the preset movement time of the powder to be tested within the signal coverage range, and the loading mechanism for carrying the powder to be tested is controlled to move according to the reference moving speed. When the powder to be tested reaches the position of the electromagnetic wave generator on the loading mechanism, the electromagnetic wave generator is controlled to emit an electromagnetic wave signal to the powder to be tested, and when the powder to be tested reaches the position of the infrared detector on the loading mechanism, the infrared signal generated by the powder to be tested and received by the infrared detector is obtained, so as to determine the detection result of the metal particles in the powder to be tested according to the infrared signal; the electromagnetic wave signal is used to heat the metal particles in the powder to be tested; in the above method, the loading mechanism is controlled The moving powder to be tested first passes through an electromagnetic wave generator, which radiates electromagnetic wave signals to the powder to be tested, and then passes through an external infrared detector, which obtains the infrared signal generated by the powder to be tested, and determines the detection result of the metal particles in the powder to be tested based on the obtained infrared signal. The obtained infrared signal can be used to reflect the thermal sensitivity difference between the metal particles and other components in the powder to be tested under the action of the electromagnetic wave signal. The metal particles are sensitive to the electromagnetic wave signal, and a significant thermal sensitivity difference is generated between other components under the action of the electromagnetic wave signal. The significant thermal sensitivity difference is used to detect the metal particles in the powder, which improves the detection sensitivity and correspondingly reduces the risk of missed detection and false detection.

[0093] In order to obtain the detection result of metal particles in the powder to be tested, in one embodiment, as Figure 3 As shown, the above S240, determining the detection result of metal particles in the powder to be tested according to the infrared signal, includes:

[0094] S310 , determining a temperature distribution diagram of the powder material to be inspected according to the infrared signal; the temperature distribution diagram includes temperatures at different locations in the powder material to be inspected.

[0095] The temperature distribution diagram of the powder to be inspected may be an infrared thermal image of the powder to be inspected.

[0096] Optionally, the controller can receive infrared signals generated by different positions on the powder material to be tested and collected by the infrared detector, and convert the signal intensity of the infrared signals at different positions into temperature values ​​according to the pre-calibrated correspondence between signal intensity and temperature, thereby obtaining the temperature values ​​at different positions on the powder material to be tested, and then use the preset temperature range and color correspondence to represent the temperature values ​​at different positions on the powder material to be tested with corresponding colors, thereby forming a temperature distribution map of the powder material to be tested.

[0097] S320: Determine the detection result of the metal particles in the powder to be tested according to the temperature distribution diagram.

[0098] The detection result of the metal particles in the powder to be tested is used to indicate whether the metal particles exist in the powder to be tested.

[0099] Optionally, after obtaining the temperature distribution map of the powder to be tested, the controller may analyze and process the temperature distribution map to determine whether there is an area in the temperature distribution map whose color is different from the color of the surrounding area, and if so, determine that the detection result of the metal particles in the powder to be tested is that metal particles exist; conversely, if not, determine that the detection result of the metal particles in the powder to be tested is that metal particles do not exist.

[0100] In an embodiment of the present application, a temperature distribution map of the powder to be tested is determined according to an infrared signal, and a detection result of metal particles in the powder to be tested is determined according to the temperature distribution map; the temperature distribution map includes the temperatures of different position points in the powder to be tested; in the above method, a temperature distribution map of the powder to be tested is determined according to the infrared signal, and then the detection result of metal particles in the powder to be tested is determined based on the temperature distribution map. The process of determining the temperature distribution map according to the infrared signal is simple and easy to implement in a program, which can improve the detection efficiency, and the temperature distribution map can accurately reflect the temperature distribution of the powder to be tested, which is helpful for the subsequent determination of whether there are metal particles with obvious thermal sensitivity differences between the powder to be tested and other components, thereby simultaneously improving the detection reliability.

[0101] To simplify the process of determining the test results, in one embodiment, as Figure 4 As shown, the above S320, determining the detection result of metal particles in the powder to be tested according to the temperature distribution diagram, includes:

[0102] S410 , when an abnormal area exists in the temperature distribution map, determining that the detection result is that metal particles exist in the powder to be tested; the abnormal area refers to an area formed by position points where the temperature is higher than the temperature threshold.

[0103] There may be no abnormal area in the temperature distribution map, or there may be one or more abnormal areas.

[0104] Optionally, after obtaining the temperature distribution map of the powder to be tested, the controller can compare the temperature of each position point with a preset temperature threshold, and regard the area formed by the position points in the temperature distribution map where the temperature is higher than the temperature threshold as an abnormal area. If there is an abnormal area in the temperature distribution map, the detection result is determined to be the presence of metal particles in the powder to be tested.

[0105] S420: When there is no abnormal area in the temperature distribution diagram, determine that the detection result is that there are no metal particles in the powder to be tested.

[0106] Optionally, after obtaining the temperature distribution map of the powder to be tested, the controller can compare the temperature of each position point with a preset temperature threshold, and regard the area formed by the position points in the temperature distribution map where the temperature is higher than the temperature threshold as an abnormal area. If there is no abnormal area in the temperature distribution map, the detection result is determined to be that there are no metal particles in the powder to be tested.

[0107] In an embodiment of the present application, when there is an abnormal area in the temperature distribution map, the detection result is determined to be the presence of metal particles in the powder to be tested; when there is no abnormal area in the temperature distribution map, the detection result is determined to be the absence of metal particles in the powder to be tested; the abnormal area represents an area formed by position points where the temperature is higher than the temperature threshold; in the above method, whether there is an abnormal area in the temperature distribution map is determined based on temperature comparison, and then the detection result is determined. There is no need to perform complex analysis and processing on the temperature distribution map, which simplifies the process of determining the detection result and can correspondingly improve the detection efficiency.

[0108] To improve the detection richness, in one embodiment, as Figure 5 As shown, the above method also includes:

[0109] S510 : When the detection result shows that metal particles exist in the powder to be tested, determine the number and / or size of abnormal areas according to the temperature distribution map.

[0110] Each abnormal region corresponds to a metal particle. The number of abnormal regions is the number of metal particles, and the size of the abnormal region is the size of the metal particle. For example, the size of the abnormal region can be represented by the length and width of the abnormal region, or by the maximum diameter of the abnormal region.

[0111] Optionally, when the detection result shows that metal particles exist in the powder to be tested, the controller can further extract each abnormal area in the temperature distribution map to count the number of abnormal areas, and can also measure the maximum diameter of each abnormal area as the size of the abnormal area.

[0112] S520: Determine the number and / or size of the abnormal areas as metal particle information of the powder to be inspected.

[0113] Optionally, after obtaining the number of abnormal areas in the temperature distribution diagram and / or the size of each abnormal area, the controller can record and store this data information as metal particle information of the powder to be tested, and can also send it to the display terminal for display.

[0114] Exemplarily, the controller can send the temperature distribution map of the powder to be tested to the display end for display, and when the detection result is that metal particles exist in the powder to be tested, the label of each abnormal area and the size of the abnormal area are displayed in the temperature distribution map of the display end, that is, the metal particle information of the powder to be tested is displayed in the image distribution map on the display end.

[0115] In an embodiment of the present application, when the detection result is that metal particles exist in the powder to be tested, the number and / or size of the abnormal areas are determined based on the temperature distribution map, and the number and / or size of the abnormal areas are determined as the metal particle information of the powder to be tested; in the above method, when the presence of metal particles is detected, the number and / or size of the abnormal areas are determined based on the temperature distribution map as the metal particle information, and on the basis of detecting the presence of metal particles, more dimensional information including the number and / or size of the metal particles in the powder to be tested is further obtained, thereby improving the richness of detection.

[0116] The test results can also be fed back to adjust the powder detection system. In one embodiment, Figure 6 As shown, the above method also includes:

[0117] S610: Adjust the working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism according to the detection result.

[0118] The operating parameters of the electromagnetic wave generator may include the output voltage, output current, output power, frequency band of the emitted electromagnetic wave signal, etc.

[0119] Optionally, after obtaining the test results of the powder to be tested, the controller can determine the adjustment strategy corresponding to the test results based on the correspondence between the preset test results and the adjustment strategy, and adjust the working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism according to the adjustment strategy.

[0120] S620 : Based on the adjusted working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism, detect the metal particles of the powder to be tested carried by the loading mechanism.

[0121] Optionally, the adjusted working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism are obtained, and the controller can continue to detect the metal particles of the powder to be tested carried on the loading mechanism according to the adjusted working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism.

[0122] For example, the controller may use the adjusted working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism to continue detecting the metal particles of the powder to be tested carried on the loading mechanism that is subsequently transmitted; the user may also collect the powder to be tested that will be tested using the working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism before adjustment, and place the collected powder to be tested on the loading mechanism again, so as to use the adjusted working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism to conduct a second detection on the powder to be tested carried on the loading mechanism.

[0123] In an embodiment of the present application, the working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism are adjusted according to the detection results, and based on the adjusted working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism, the metal particles of the powder to be tested carried on the loading mechanism are detected; in the above method, the working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism in the powder detection system are feedback-adjusted based on the detection results to improve the detection results, thereby improving the reliability and accuracy of the detection results.

[0124] The working parameters of the electromagnetic wave generator include output power. In one embodiment, the working parameters of the electromagnetic wave generator are adjusted. Figure 7 As shown, the above S610 adjusts the working parameters of the electromagnetic wave generator according to the detection result, including:

[0125] S710: When the detection result indicates that metal particles exist in the powder to be tested, the output power is kept unchanged.

[0126] Among them, the detection result is the presence of metal particles in the powder to be tested, indicating that the current output power of the electromagnetic wave generator is appropriate and sufficient to significantly increase the temperature of the metal particles, so as to successfully detect the metal particles in the powder to be tested.

[0127] Optionally, the loading mechanism continuously transmits the powder to be tested, and the controller can read the test results in real time or periodically, and when the test result shows that metal particles exist in the powder to be tested, the current output power of the electromagnetic wave generator is kept unchanged.

[0128] S720: When the test result shows that no metal particles exist in the powder to be tested, increase the output power.

[0129] Among them, the test result is that there are no metal particles in the powder to be tested. It may be that there are indeed no metal particles in the powder to be tested, or it may be that the current output power of the electromagnetic wave generator is too small to significantly heat the metal particles, and the metal particles in the powder to be tested cannot be successfully detected.

[0130] Optionally, the loading mechanism continuously transmits the powder to be tested, and the controller can read the test results in real time or periodically. When the test result shows that there are no metal particles in the powder to be tested, the current output power of the electromagnetic wave generator can be increased according to a preset ratio or preset increment, such as by 2%.

[0131] For example, the controller may increase the output power if the detection results show the absence of metal particles for a preset number of consecutive times or for a preset duration. Alternatively, the controller may stop increasing the output power after a preset number of increases or if the output power reaches a preset power threshold, such as maintaining the current output power unchanged.

[0132] In an embodiment of the present application, the operating parameters of the electromagnetic wave generator include output power. When the detection result shows that metal particles exist in the powder to be tested, the output power is kept unchanged; when the detection result shows that no metal particles exist in the powder to be tested, the output power is increased. In the above method, the output power of the electromagnetic wave generator is adjusted differently based on different detection results, so that when metal particles are detected, the output power is kept unchanged to reduce unnecessary power consumption, and when no metal particles are detected, the output power is increased to promote the subsequent heating of metal particles in the powder to be tested, reduce missed detections caused by insufficient output power of the electromagnetic wave generator, and thus improve the comprehensiveness and accuracy of detection.

[0133] Regarding the adjustment of the moving speed of the loading mechanism, in one embodiment, as Figure 8 As shown, the above S610 adjusts the moving speed of the loading mechanism according to the detection result, including:

[0134] S810: When the detection result shows that metal particles exist in the powder to be tested, the moving speed is kept unchanged.

[0135] Among them, the detection result shows that metal particles exist in the powder to be tested, which also indicates that the current moving speed of the loading mechanism is appropriate, which is sufficient to allow the metal particles to be fully irradiated by the electromagnetic wave signal within the signal coverage range of the electromagnetic wave generator and appear to be significantly heated, so as to successfully detect the metal particles in the powder to be tested.

[0136] Optionally, the loading mechanism continuously transports the powder to be tested, and the controller can read the test results in real time or periodically, and maintain the current moving speed of the loading mechanism unchanged when the test result indicates that metal particles exist in the powder to be tested.

[0137] S820: When the detection result shows that no metal particles exist in the powder to be tested, the moving speed of the loading mechanism is adjusted according to the movement time of the powder to be tested within the signal coverage range of the electromagnetic wave generator.

[0138] Among them, the detection result is that there are no metal particles in the powder to be tested. It may be that there are indeed no metal particles in the powder to be tested, or it may be that the current moving speed of the loading mechanism is too fast, and the movement time of the powder to be tested within the signal coverage range of the electromagnetic wave generator is too short, so that the metal particles in the powder to be tested are not fully irradiated by the electromagnetic wave signal and are not significantly heated. Therefore, the metal particles in the powder to be tested cannot be successfully detected.

[0139] Optionally, the loading mechanism continuously transports the powder to be tested, and the controller can read the test results in real time or periodically. If the test result shows that no metal particles are present in the powder to be tested, the controller can reduce the speed of the loading mechanism to increase the time the powder to be tested spends within the signal coverage of the electromagnetic wave generator. This allows the metal particles in the powder to be tested to significantly heat up after being fully irradiated by the electromagnetic wave signal, facilitating the subsequent successful detection of the metal particles in the powder to be tested. The controller can adjust the speed of the loading mechanism based on the time the powder to be tested spends within the signal coverage of the electromagnetic wave generator in the current situation, i.e., reduce the speed of the loading mechanism.

[0140] In an optional embodiment, if Figure 9 As shown, the above S820 adjusts the moving speed of the loading mechanism according to the movement time of the powder to be inspected within the signal coverage range of the electromagnetic wave generator, including:

[0141] S910. Determine a reference duration according to the moving duration; the reference duration is greater than the moving duration.

[0142] Optionally, the controller may directly read the current movement duration, increase the movement duration according to a preset ratio or a preset increment, and use the increased movement duration as a reference duration.

[0143] S920: Determine the target moving speed according to the reference duration and the signal coverage range.

[0144] Optionally, taking the coverage width of the electromagnetic wave generator in the moving direction of the powder to be tested as an example to represent the signal coverage range, the controller can use the coverage width as the moving distance of the loading mechanism, and use the reference time as the moving time of the loading mechanism to determine the new moving speed of the loading mechanism as the target moving speed.

[0145] For example, taking the coverage width L of the electromagnetic wave generator and the reference time T' as an example, the target moving speed of the loading mechanism is V'=L / T'.

[0146] S930: Control the loading mechanism to move at the target moving speed.

[0147] Optionally, after obtaining the target moving speed of the loading mechanism, the controller may adjust the moving speed of the loading mechanism to the target moving speed to control the loading mechanism to move according to the target moving speed.

[0148] It should be noted that the reference duration is greater than the moving duration in the current situation, the signal coverage range of the electromagnetic wave generator has not changed, that is, the moving distance has not changed, the moving duration has increased, and the moving speed has decreased, that is, the determined target moving speed is less than the moving speed of the loading mechanism in the current situation.

[0149] For example, the controller may reduce the movement speed if the detection results show the absence of metal particles for a preset number of times or for a preset period of time. Alternatively, the controller may stop reducing the movement speed after a preset number of times or if the movement speed reaches a preset speed threshold, for example, maintaining the current movement speed.

[0150] It should be noted that when the detection result shows that metal particles exist in the powder to be tested, and the working parameters of the electromagnetic wave generator and the moving speed of the loading mechanism are adjusted, the adjustments can be made simultaneously or successively.

[0151] For example, when the detection result shows that no metal particles are present in the powder to be tested, the controller may first increase the output power of the electromagnetic wave generator, and when the output power is higher than a preset power threshold, or when the detection result after a preset number of detections / a preset duration still shows that no metal particles are present, the controller may then reduce the moving speed of the loading mechanism until the moving speed is lower than the preset speed threshold, or when the detection result after a preset number of detections / a preset duration still shows that no metal particles are present, or when the detection result shows that metal particles are present in the powder to be tested. Similarly, the moving speed of the loading mechanism may be controlled to be reduced first, and when the moving speed is lower than the preset power threshold, or when the detection result after a preset number of detections / a preset duration still shows that no metal particles are present, the controller may then increase the output power of the electromagnetic wave generator until the output power is higher than the preset power threshold, or when the detection result after a preset number of detections / a preset duration still shows that no metal particles are present, or when the detection result shows that metal particles are present in the powder to be tested.

[0152] In an embodiment of the present application, when the detection result shows that there are metal particles in the powder to be tested, the moving speed is kept unchanged; when the detection result shows that there are no metal particles in the powder to be tested, the moving speed of the loading mechanism is adjusted according to the moving time of the powder to be tested within the signal coverage range of the electromagnetic wave generator. Specifically, a reference time greater than the moving time can be determined according to the moving time, and a target moving speed can be determined according to the reference time and the signal coverage range to control the loading mechanism to move according to the target moving speed. In the above method, the moving speed of the loading mechanism is adjusted differently based on different detection results, so that when metal particles are detected, the moving speed is kept unchanged to reduce unnecessary power consumption, and when no metal particles are detected, the moving speed is reduced to increase the moving time of the powder to be tested within the signal coverage range of the electromagnetic wave generator, so that the metal particles in the powder to be tested are significantly heated after being fully irradiated by the electromagnetic wave signal, reducing missed detection caused by too short a moving time of the powder to be tested within the signal coverage range of the electromagnetic wave generator, thereby improving the comprehensiveness and accuracy of the detection.

[0153] In order to facilitate the understanding of those skilled in the art, the powder material detection method provided in this application is described in detail below. Figure 10 As shown, the method may include:

[0154] S1001. Determine a reference moving speed of a loading mechanism based on a signal coverage range of an electromagnetic wave generator and a preset movement time of the powder to be inspected within the signal coverage range; the loading mechanism is configured to carry the powder to be inspected; and the electromagnetic wave generator is positioned toward the loading mechanism.

[0155] S1002, controlling the loading mechanism to move according to a reference moving speed;

[0156] S1003. When the powder material to be inspected reaches the position of the electromagnetic wave generator on the loading mechanism, the electromagnetic wave generator is controlled to transmit an electromagnetic wave signal to the powder material to be inspected; the electromagnetic wave signal is used to heat the metal particles in the powder material to be inspected;

[0157] S1004, when the powder material to be inspected reaches the position of the infrared detector on the loading mechanism, an infrared signal generated by the powder material to be inspected and received by the infrared detector is obtained; the infrared detectors are all arranged toward the loading mechanism;

[0158] S1005, determining a temperature distribution diagram of the powder to be tested based on the infrared signal; the temperature distribution diagram includes the temperatures at different locations in the powder to be tested;

[0159] S1006: If an abnormal area exists in the temperature distribution graph, determining that the detection result is that metal particles exist in the powder to be tested; the abnormal area represents an area formed by points where the temperature is higher than the temperature threshold;

[0160] S1007: If no abnormal area exists in the temperature distribution graph, determining that the test result is that no metal particles exist in the powder to be tested;

[0161] S1008. When the test result indicates that metal particles are present in the powder to be tested, determine the number and / or size of abnormal areas based on the temperature distribution map;

[0162] S1009, determining the number and / or size of the abnormal areas as metal particle information of the powder to be tested;

[0163] S1010, when the detection result shows that metal particles are present in the powder to be tested, maintaining the output power of the electromagnetic wave generator and the moving speed of the loading mechanism unchanged;

[0164] S1011. When the test result shows that no metal particles exist in the powder to be tested, increase the output power of the electromagnetic wave generator, and / or determine a reference duration greater than the moving duration based on the moving duration, and determine a target moving speed based on the reference duration and the signal coverage range, and control the loading mechanism to move at the target moving speed.

[0165] It should be noted that for the description in the above S1001-S1011, reference can be made to the relevant description in the above embodiment, and the effects are similar, so this embodiment will not be repeated here.

[0166] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0167] In one embodiment, Figure 11 As shown, a powder material detection device is provided, comprising: a movement control module 1101, an electromagnetic control module 1102, an infrared control module 1103 and a result determination module 1104; wherein:

[0168] The movement control module 1101 is used to determine the reference movement speed of the loading mechanism based on the signal coverage range of the electromagnetic wave generator and the preset movement time of the powder material to be tested within the signal coverage range, and control the loading mechanism to move at the reference movement speed; the loading mechanism is used to carry the powder material to be tested;

[0169] The electromagnetic control module 1102 is used to control the electromagnetic wave generator to emit electromagnetic wave signals to the powder material to be tested when the powder material to be tested reaches the position of the electromagnetic wave generator on the loading mechanism; the electromagnetic wave signal is used to heat the metal particles in the powder material to be tested;

[0170] The infrared control module 1103 is used to obtain the infrared signal generated by the powder material to be inspected and received by the infrared detector when the powder material to be inspected reaches the position of the infrared detector on the loading mechanism;

[0171] The result determination module 1104 is used to determine the detection result of the metal particles in the powder to be detected according to the infrared signal.

[0172] Each module in the powder material detection device can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0173] In one embodiment, a powder material detection system is provided, such as Figure 1 As shown, the powder detection system 100 includes: a controller 101, and an electromagnetic wave generator 102, an infrared detector 103 and a loading mechanism 104 connected to the controller 101; the electromagnetic wave generator 102 and the infrared detector 103 are both arranged toward the loading mechanism 104; the controller 101 is used to implement the steps of any of the above-mentioned powder detection methods.

[0174] It should be noted that the powder detection system may also include a temperature sensor and an overload protector. The temperature sensor can collect the temperature of any component in the powder detection system, as well as the temperature of the powder to be detected. The controller can compare the collected temperature with the temperature threshold so that when any temperature is higher than the temperature threshold, the power supply of the powder detection system can be cut off through the overload protector to improve the safe operation of the system.

[0175] Those skilled in the art will understand that Figure 1 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0176] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the above-mentioned powder material detection methods are implemented.

[0177] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of any one of the above-mentioned powder material detection methods when executed by a processor.

[0178] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), data processing logic devices based on quantum computing, and the like.

[0179] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0180] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A powder material detection method, characterized in that: A controller is used in a powder detection system, the powder detection system comprising an electromagnetic wave generator, an infrared detector, and a loading mechanism connected to the controller, wherein the electromagnetic wave generator and the infrared detector are both disposed toward the loading mechanism; the controller is connected to the electromagnetic wave generator via a voltage-controlled oscillator; and the method comprises: Determining a reference moving speed of the loading mechanism based on the signal coverage range of the electromagnetic wave generator and a preset movement time of the powder to be inspected within the signal coverage range, and controlling the loading mechanism to move at the reference moving speed; the loading mechanism is used to carry the powder to be inspected; When the powder material to be inspected reaches the position of the electromagnetic wave generator on the loading mechanism, a tuning voltage is applied to the voltage-controlled oscillator to control the electromagnetic wave generator to emit an electromagnetic wave signal with a frequency matching the electromagnetic response frequency of the metal particles to the powder material to be inspected; the electromagnetic wave signal is used to heat the metal particles in the powder material to be inspected; When the powder material to be inspected reaches the position of the infrared detector on the loading mechanism, an infrared signal generated by the powder material to be inspected and received by the infrared detector is obtained; The detection result of the metal particles in the powder to be detected is determined according to the infrared signal.

2. The method according to claim 1, characterized in that Determining the detection result of the metal particles in the powder to be tested according to the infrared signal includes: Determine a temperature distribution diagram of the powder material to be tested according to the infrared signal; the temperature distribution diagram includes the temperatures at different positions in the powder material to be tested; The detection result of the metal particles in the powder to be detected is determined according to the temperature distribution diagram.

3. The method according to claim 2, characterized in that Determining the detection result of the metal particles in the powder to be tested according to the temperature distribution diagram includes: If an abnormal area exists in the temperature distribution diagram, determining that the detection result is that metal particles exist in the powder to be tested; the abnormal area represents an area formed by position points whose temperature is higher than a temperature threshold; When no abnormal area exists in the temperature distribution diagram, it is determined that the detection result is that no metal particles exist in the powder to be tested.

4. The method according to claim 3, characterized in that The method further comprises: When the detection result indicates that metal particles are present in the powder to be tested, determining the number and / or size of the abnormal areas according to the temperature distribution map; The number and / or size of the abnormal areas are determined as the metal particle information of the powder to be tested.

5. The method according to any one of claims 1 to 3, characterized in that The method further comprises: adjusting the operating parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism according to the detection result; Based on the adjusted working parameters of the electromagnetic wave generator and / or the moving speed of the loading mechanism, the metal particles of the powder to be tested carried by the loading mechanism are detected.

6. The method according to claim 5, characterized in that The operating parameters of the electromagnetic wave generator include output power; and adjusting the operating parameters of the electromagnetic wave generator according to the detection result includes: When the detection result indicates that metal particles are present in the powder to be detected, maintaining the output power unchanged; When the detection result shows that no metal particles exist in the powder to be detected, the output power is increased.

7. The method according to claim 5, characterized in that Adjusting the moving speed of the loading mechanism according to the detection result includes: When the detection result indicates that metal particles are present in the powder to be detected, maintaining the moving speed unchanged; When the detection result shows that no metal particles are present in the powder to be inspected, the moving speed of the loading mechanism is adjusted according to the movement time of the powder to be inspected within the signal coverage range of the electromagnetic wave generator.

8. The method according to claim 7, characterized in that The adjusting the moving speed of the loading mechanism according to the movement time of the powder to be inspected within the signal coverage range of the electromagnetic wave generator includes: Determine a reference duration according to the movement duration; the reference duration is greater than the movement duration; Determine the target moving speed according to the reference duration and the signal coverage range; The loading mechanism is controlled to move according to the target moving speed.

9. A powder material detection system, characterized in that: The powder detection system includes: a controller, and an electromagnetic wave generator, an infrared detector and a loading mechanism connected to the controller; the electromagnetic wave generator and the infrared detector are both arranged toward the loading mechanism; the controller is used to implement the steps of the method described in any one of claims 1 to 8.

10. A powder material detection device, characterized in that: The powder material detection device comprises: a movement control module, configured to determine a reference movement speed of the loading mechanism based on the signal coverage range of the electromagnetic wave generator and a preset movement time of the powder material to be inspected within the signal coverage range, and to control the loading mechanism to move at the reference movement speed; the loading mechanism is configured to carry the powder material to be inspected; an electromagnetic control module, configured to apply a tuning voltage to a voltage-controlled oscillator when the powder material to be inspected reaches the position of the electromagnetic wave generator on the loading mechanism, thereby controlling the electromagnetic wave generator to transmit an electromagnetic wave signal having a frequency matching the electromagnetic response frequency of the metal particles to the powder material to be inspected; the electromagnetic wave signal is used to heat the metal particles in the powder material to be inspected; An infrared control module is used to obtain an infrared signal generated by the powder to be inspected and received by the infrared detector when the powder to be inspected on the loading mechanism reaches the position of the infrared detector; The result determination module is used to determine the detection result of the metal particles in the powder to be detected according to the infrared signal.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

12. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

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