Risk detection method and risk detection device for electronic product

Abstract

The present disclosure is applied to the technical field of ray inspection. Provided are a risk detection method and risk detection device for an electronic product. The method comprises: on the basis of acquired product weight information and reference weight information, determining weight difference information; on the basis of an acquired first image and second image, determining a peak signal-to-noise ratio between planar two-dimensional ray attenuation distribution images of a product to be inspected and a reference product, wherein the peak signal-to-noise ratio characterizes the overall similarity between the product to be inspected and the reference product; on the basis of the acquired first image and second image, determining a subtraction value between the planar two-dimensional ray attenuation distribution images of the product to be inspected and the reference product, wherein the subtraction value characterizes the local difference between the product to be inspected and the reference product; and on the basis of the weight difference information, the peak signal-to-noise ratio and the subtraction value, determining a risk level of the product to be inspected. The present disclosure can reduce detection costs and lower the difficulty of protection by using a relatively low ray energy and dose.

Description

Risk detection methods and equipment for electronic products

[0001] This disclosure claims priority to Chinese Patent Application No. 202510228639.3, filed on February 28, 2025, the contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of radiation safety detection technology, and more specifically, to a risk detection method and risk detection equipment for electronic products. Background Technology

[0003] Currently, there is no dedicated security inspection equipment for detecting whether electronic products such as mobile phones, tablets, and wearable devices have been modified. Traditional X-ray security inspection equipment primarily focuses on larger, more dangerous items, such as controlled knives, firearms, ammunition, and flammable and explosive materials. Traditional X-ray security inspection equipment requires a conveyor system, resulting in a large size and footprint. Another type of portable X-ray inspection equipment is mainly used for explosion-proof inspections. However, because portable X-ray inspection equipment lacks protective devices, a relatively large shielding distance is required during inspection, limiting its application scenarios.

[0004] In summary, neither of these two types of X-ray security inspection equipment is suitable for inspecting electronic products such as mobile phones and tablets. Therefore, in the field of electronic product security inspection, there are no effective means to detect modifications such as the addition of small chips or changes to circuits, and / or the storage of small amounts of explosives within electronic products. Electronic products thus become a potential threat to public health and property safety. Furthermore, the detection methods and algorithms used by the aforementioned two types of X-ray security inspection equipment are complex, requiring high-resolution and clearly interpretable X-ray images to determine the hazard and whether the inspected product has been modified. This necessitates high X-ray energy and dosage, which increases detection costs and the difficulty of protective measures. Summary of the Invention

[0005] To address the aforementioned problems in related technologies, this disclosure proposes a risk detection method and a risk detection device for electronic products. The risk detection method for electronic products has the advantages of accurate detection, low cost, and low protection difficulty.

[0006] One aspect of this disclosure provides a risk detection method for electronic products, comprising: acquiring product weight information of a product to be inspected and reference weight information of a reference product; determining weight difference information based on the product weight information and the reference weight information; acquiring a two-dimensional plane distribution image of the ray attenuation of the product to be inspected as a first image; acquiring a two-dimensional plane distribution image of the ray attenuation of the reference product as a second image; determining the peak signal-to-noise ratio (PSNR) of the two-dimensional plane distribution images of the ray attenuation of the product to be inspected and the reference product based on the first image and the second image, wherein the PSNR characterizes the overall similarity between the product to be inspected and the reference product; determining the subtraction value of the two-dimensional plane distribution images of the ray attenuation of the product to be inspected and the reference product based on the first image and the second image, wherein the subtraction value characterizes the local difference between the product to be inspected and the reference product; and determining the risk level of the product to be inspected based on the weight difference information, the PSNR, and the subtraction value, wherein the risk level includes different risk grades.

[0007] The risk detection method for electronic products according to embodiments of this disclosure can comprehensively judge the risk level of the product under inspection by combining weight information and a two-dimensional distribution image of radiation attenuation, thus expanding the dimensions of risk level judgment and making the judgment more accurate. Furthermore, this disclosure can extract the overall similarity between the product under inspection and the reference product through peak signal-to-noise ratio (PSNR), and can extract the local differences between the product under inspection and the reference product through subtraction value. The first and second images used to calculate the PSNR and subtraction value do not require high-resolution, clearly discernible radiation images. Therefore, this disclosure achieves accurate detection of the risk level of the product under inspection while requiring lower radiation energy and dose. Lower radiation energy and dose reduce detection costs and protection difficulties.

[0008] Another aspect of this disclosure provides a risk detection device for electronic products, comprising: a protective housing for shielding radiation, the protective housing having a receiving cavity; a radiation source disposed in the receiving cavity; a detector disposed in the receiving cavity, wherein one of a product to be inspected and a reference product is adapted to be placed between the radiation source and the detector to receive scanning by the radiation source; a weighing device disposed in the receiving cavity for weighing the product to be inspected to obtain product weight information, and for weighing the reference product to obtain reference weight information; and a control device communicatively connected to the radiation source, the detector, and the weighing device, for: controlling the radiation source to emit a beam; receiving a two-dimensional plane distribution image of the radiation attenuation of the product to be inspected output by the detector as a first image; retrieving a pre-stored two-dimensional plane distribution image of the radiation attenuation of the reference product as a second image, or receiving a two-dimensional plane distribution image of the radiation attenuation of the reference product output by the detector as a second image. The system generates a two-dimensional planar distribution image of the product's radiation attenuation as a second image; receives product weight information from the weighing device; retrieves pre-stored reference weight information, or receives reference weight information from the weighing device; determines weight difference information based on the product weight information and the reference weight information; determines the peak signal-to-noise ratio (PSNR) of the two-dimensional planar distribution images of the radiation attenuation of the product under inspection and the reference product based on the first image and the second image, wherein the PSNR characterizes the overall similarity between the product under inspection and the reference product; determines the subtraction value of the two-dimensional planar distribution images of the radiation attenuation of the product under inspection and the reference product based on the first image and the second image, wherein the subtraction value characterizes the local difference between the product under inspection and the reference product; and determines the risk level of the product under inspection based on the weight difference information, the PSNR, and the subtraction value, wherein the risk level includes different risk grades.

[0009] According to embodiments of the risk detection device disclosed herein, by placing the radiation source, detector, and weighing device within a protective housing, the housing can shield the radiation, protecting the health of security personnel during the operation of the radiation source and detector. This device allows products to be inspected to be placed directly into the weighing device for testing, eliminating the need for a conveyor belt and reducing the size and footprint of the risk detection equipment. Furthermore, compared to portable X-ray inspection equipment in related technologies, the risk detection device of this disclosure has a protective housing, thus eliminating the need for a large protective distance during testing, making it more flexible in application scenarios. In addition, this disclosure allows for the implementation of a risk detection method for electronic products via a control device. This method combines weight information and a two-dimensional distribution image of radiation attenuation to comprehensively determine the risk level of the product under inspection, expanding the dimensions of risk level assessment and making the assessment more accurate. Furthermore, this disclosure can uncover the overall similarity between the product under test and the reference product through the peak signal-to-noise ratio (PSNR), and can uncover the local differences between the product under test and the reference product through the subtraction value (S / N). The first and second images used to calculate the PNR and S / N do not require high-resolution, clearly discernible X-ray images. Therefore, this disclosure can accurately detect the risk level of the product under test while requiring lower X-ray energy and dose. Lower X-ray energy and dose will reduce detection costs and reduce protection difficulties.

[0010] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0011] To gain a more complete understanding of this disclosure and its advantages, reference will now be made to the following description taken in conjunction with the accompanying drawings, wherein:

[0012] Figure 1 is a flowchart of a risk detection method for an electronic product according to an embodiment of the present disclosure;

[0013] Figure 2 is a flowchart of the steps for determining the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product under test and the reference product based on the first image and the second image according to an embodiment of the present disclosure;

[0014] Figure 3 is a flowchart of the steps for determining the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product under inspection and the reference product based on the first image and the second image according to an embodiment of the present disclosure;

[0015] Figure 4 is a flowchart of the steps for determining the risk level of a product to be inspected based on weight difference information, peak signal-to-noise ratio and subtraction value according to some embodiments of the present disclosure;

[0016] Figure 5 is a flowchart of the steps for determining the risk level of a product to be inspected based on weight difference information, peak signal-to-noise ratio and subtraction value according to other embodiments of the present disclosure;

[0017] Figure 6 is a schematic diagram of the structure of a risk detection device according to an embodiment of the present disclosure.

[0018] Reference numerals: Risk detection equipment 100, protective shell 1, receiving cavity 11, opening and closing door 12, radiation source 2, detector 3, weighing device 4, weighing actuator 41, weighing processor 42, control device 5. Detailed Implementation

[0019] The embodiments of this disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this disclosure. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this disclosure. Additionally, the various embodiments and technical features provided below can be combined with each other in any manner.

[0020] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. Furthermore, the terms "comprising," "including," etc., as used herein indicate the presence of said features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components. All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0021] In the field of electronic product security inspection, there are no good means to detect the additional modifications made to electronic products, such as adding small chips or changing circuits, and / or the dangerous behavior of storing small amounts of explosives in electronic products. As a result, electronic products have become a hidden danger to people's health and property safety.

[0022] The risk detection method and risk detection device for electronic products according to embodiments of the present disclosure are described below with reference to Figures 1-6.

[0023] As shown in Figure 1, the risk detection method for electronic products according to an embodiment of the present disclosure includes operations S110-S170.

[0024] In operation S110, the product weight information of the product to be inspected and the reference weight information of the reference product are acquired. It is understood that the product weight information of the product to be inspected can be measured by the weighing device in the risk inspection equipment for electronic products, and the weighing device transmits the product weight information to the control device in the risk inspection equipment. The reference weight information of the reference product can be pre-measured by the weighing device in the risk inspection equipment for electronic products and pre-stored in the control device in the risk inspection equipment. When the reference weight information is needed, it can be directly retrieved. Alternatively, the reference weight information can also be measured by the weighing device in the risk inspection equipment for electronic products each time it is used, and the weighing device transmits the reference weight information to the control device in the risk inspection equipment. Acquiring the reference weight information in this disclosure includes retrieving the reference weight information from the control device or receiving the reference weight information from the weighing device.

[0025] In operation S120, weight difference information is determined based on product weight information and reference weight information. In some examples, the weight difference information can be the difference between the product weight information and the reference weight information. After receiving the product weight information and the reference weight information, the control device can calculate the weight difference information.

[0026] In operation S130, a two-dimensional planar distribution image of the radiation attenuation of the product to be inspected is acquired as the first image. This means that the product to be inspected is placed in a risk detection device, where a radiation source scans the product. The detector receives the scanning signal and outputs a two-dimensional planar distribution image of the radiation attenuation of the product as the first image. The detector then transmits this first image to the control device.

[0027] In operation S140, a two-dimensional distribution image of the ray attenuation plane of the reference product is acquired as the second image.

[0028] It is understandable that "acquisition" here includes both retrieval and reception. When acquisition includes retrieval, the two-dimensional distribution image of the radiation attenuation plane of the reference product (the second image) is data pre-stored after the detector measurement. When the two-dimensional distribution image of the radiation attenuation plane of the reference product (the second image) is needed, it can be retrieved directly. When acquisition includes reception, the reference product needs to be placed in the risk detection equipment. The radiation source in the risk detection equipment scans the reference product with radiation. The detector receives the scan signal and outputs the two-dimensional distribution image of the radiation attenuation plane of the reference product as the second image. The detector transmits the second image to the control device, and the control device receives the second image.

[0029] In operation S150, based on the first image and the second image, the peak signal-to-noise ratio (PSNR) of the two-dimensional distribution images of the X-ray attenuation plane of the product under inspection and the reference product is determined, wherein the PSNR of the two-dimensional distribution images of the X-ray attenuation plane of the product under inspection and the reference product characterizes the overall similarity between the product under inspection and the reference product.

[0030] After acquiring the first image and the second image, the control device can determine the peak signal-to-noise ratio (PSNR) of the two-dimensional distribution images of the X-ray attenuation plane between the product under inspection and the reference product based on the first image and the second image. As one possible implementation, as shown in Figure 2, operation S150, which determines the PSNR of the two-dimensional distribution images of the X-ray attenuation plane between the product under inspection and the reference product based on the first image and the second image, includes operations S151-S153.

[0031] In operation S151, the detector output value of each pixel in the m×n pixels of the first image is obtained as the first output value, where m represents the row m of the m×n pixels, n represents the column n of the m×n pixels, m is an integer greater than or equal to 1, and n is an integer greater than or equal to 1.

[0032] In operation S152, the detector output value of each pixel in the m×n pixels of the second image is obtained as the second output value.

[0033] In operation S153, the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product under inspection and the reference product is calculated based on the first output value and the second output value.

[0034] In some examples, the detector can output the output value of each pixel in the m×n pixels of the first image and transmit it to the control device as the first output value; the detector can output the output value of each pixel in the m×n pixels of the second image and transmit it to the control device as the second output value, or it can retrieve the output value of each pixel in the m×n pixels of the second image output by the detector in advance and transmit it to the control device as the second output value; after the control device obtains the first output value and the second output value, it can calculate the peak signal-to-noise ratio of the two-dimensional distribution image of the radiation attenuation plane of the product under inspection and the reference product according to formula (1) and formula (2).

[0035] In some specific examples:

[0036] Where PSNR represents the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane between the product under test and the reference product, MSE represents the intermediate value of the correlation formula (1) and formula (2), m represents the row m of m×n pixels, n represents the column n of m×n pixels, and I 基准产品 (i, j) represents the first output value in the i-th row and j-th column.待检产品 (i, j) represents the second output value in the i-th row and j-th column.

[0037] Formulas (1) and (2) facilitate the calculation of the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product under inspection and the reference product based on the first output value and the second output value.

[0038] By operating S151-S153, the step of determining the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product under inspection and the reference product can be easily realized based on the first image and the second image.

[0039] In operation S160, based on the first image and the second image, the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product under inspection and the reference product is determined, wherein the subtraction value characterizes the local difference between the product under inspection and the reference product.

[0040] After acquiring the first image and the second image, the control device can determine the subtraction value of the two-dimensional distribution image of the ray attenuation plane between the product under inspection and the reference product based on the first image and the second image. As one possible implementation, as shown in Figure 3, the step of determining the subtraction value of the two-dimensional distribution image of the ray attenuation plane between the product under inspection and the reference product based on the first image and the second image in operation S160 includes operations S161-S164.

[0041] In operation S161, when there is a product to be inspected between the X-ray source and the detector, the output value of the detector for each pixel in the x×y pixels of the selected pixel area of ​​the product to be inspected is obtained as the third output value, where x represents the row x of the x×y pixels, y represents the column y of the x×y pixels, x is an integer greater than or equal to 1, and y is an integer greater than or equal to 1.

[0042] In operation S162, the detector output value of each pixel in the selected pixel area of ​​the reference product (x×y pixels) is obtained as the fourth output value. This can be achieved by retrieving the pre-stored detector output value of each pixel in the selected pixel area of ​​the reference product (x×y pixels) as the fourth output value; alternatively, when a reference product exists between the radiation source and the detector, the detector output value of each pixel in the selected pixel area of ​​the directly measured reference product (x×y pixels) is obtained as the fourth output value.

[0043] In operation S163, when there is no product between the radiation source and the detector, the output value of the detector for each of the x×y pixels is obtained as the fifth output value.

[0044] In operation S164, the subtraction value of the two-dimensional distribution image of the ray attenuation plane between the product under inspection and the reference product is calculated based on the third, fourth, and fifth output values.

[0045] In some examples, the selected pixel area can be a danger zone, which can be understood as an area that may hide dangerous items (such as explosives or added small chips) and needs to be focused on. The detector can output the output value of each pixel in the selected pixel area of ​​the product under test as the third output value and transmit it to the control device; the detector can output the output value of each pixel in the selected pixel area of ​​the reference product as the fourth output value and transmit it to the control device, or it can retrieve the output value of each pixel in the selected pixel area of ​​the reference product as the fourth output value; when there is no product between the radiation source and the detector, the detector can output the fifth output value of each pixel in the selected pixel area of ​​the reference product. After the control device obtains the third, fourth and fifth output values, it can calculate the subtraction value of the two-dimensional distribution image of the radiation attenuation plane of the product under test and the reference product according to formula (3)-formula (5).

[0046] In some specific examples:

[0047] I 减影 (a, b) = exp(ΔR(a, b)) × I 基准产品 (a, b) = exp(R) 基准产品 (a, b)-R 待检产品 (a, b))×I 基准产品 (a, b)(3)

[0048] Among them, I 减影 (a, b) represent the subtraction values ​​of the two-dimensional distribution image of the X-ray attenuation plane between the product under test and the reference product, where a represents the a-th row of x×y pixels and b represents the b-th column of x×y pixels. 基准产品 (a, b) represents the fourth output value in row a and column b. 待检产品 (a, b) represents the third output value in row a and column b. air (a, b) represents the fifth output value in row a, column b, R 待检产品 (a, b) represent the intermediate values ​​of the correlation formulas (3) and (4), R 基准产品 (a, b) represent the intermediate values ​​of the correlation formulas (3) and (5). Here, x×y pixels can be, for example, 10×20 pixels.

[0049] Formulas (3)-(5) facilitate the calculation of the subtraction value of the two-dimensional distribution image of the ray attenuation plane between the product under inspection and the reference product based on the third, fourth, and fifth output values.

[0050] By operating S161-S164, the step of determining the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product under inspection and the reference product can be easily realized based on the first image and the second image.

[0051] In operation S170, the risk level of the product to be inspected is determined based on the weight difference information, peak signal-to-noise ratio, and subtraction value, wherein the risk level includes different risk grades.

[0052] As some possible implementation methods, as shown in Figure 4, operation S170 is the step of determining the risk level of the product to be inspected based on weight difference information, peak signal-to-noise ratio and subtraction value, including operations S171-S175.

[0053] In operation S171, the weight difference information is compared with a first preset threshold. For example, the first preset threshold can be set to 0.5g.

[0054] In operation S172, the peak signal-to-noise ratio is compared with a second set threshold. For example, the second set threshold can be set to 30.

[0055] In operation S173, the subtraction value is compared with the third set threshold.

[0056] In operation S174, if any one of the weight difference information, peak signal-to-noise ratio, and subtraction value fails to meet the corresponding set threshold, the risk level of the product to be inspected is determined to be high risk.

[0057] In operation S175, when the weight difference information, peak signal-to-noise ratio, and subtraction value all meet the corresponding set thresholds, the risk level of the product to be inspected is determined to be low risk.

[0058] By operating S171-S175, it is easy to determine the risk level of the product to be inspected based on weight difference information, peak signal-to-noise ratio, and subtraction value.

[0059] As some other possible implementation methods, as shown in Figure 5, operation S170 is the step of determining the risk level of the product to be inspected based on weight difference information, peak signal-to-noise ratio and subtraction value, including operations S176 to S179.

[0060] In operation S176, the weight difference information is matched with the first set risk level library to obtain the first risk level, wherein the first set risk level library includes different risk levels.

[0061] In operation S177, the peak signal-to-noise ratio is matched with the second set risk level library to obtain the second risk level, wherein the second set risk level library includes different risk levels.

[0062] In operation S178, the subtraction value is matched with the third set risk level library to obtain the third risk level, wherein the third set risk level library includes different risk levels.

[0063] In operation S179, the risk level of the product to be inspected is determined based on the first risk level, the second risk level, and the third risk level.

[0064] By operating S176 to S179, it is also easy to determine the risk level of the product to be inspected based on weight difference information, peak signal-to-noise ratio, and subtraction value.

[0065] The risk detection method for electronic products according to embodiments of this disclosure can comprehensively judge the risk level of the product under inspection by combining weight information and a two-dimensional distribution image of radiation attenuation, thus expanding the dimensions of risk level judgment and making the judgment more accurate. Furthermore, this disclosure can extract the overall similarity between the product under inspection and the reference product through peak signal-to-noise ratio (PSNR), and can extract the local differences between the product under inspection and the reference product through subtraction value. The first and second images used to calculate the PSNR and subtraction value do not require high-resolution, clearly discernible radiation images. Therefore, this disclosure achieves accurate detection of the risk level of the product under inspection while requiring lower radiation energy and dose. Lower radiation energy and dose reduce detection costs and protection difficulties.

[0066] As shown in Figure 6, the risk detection device for electronic products according to an embodiment of this disclosure includes a protective shell 1, an X-ray source 2, a detector 3, a weighing device 4, and a control device 5.

[0067] Specifically, referring to Figure 6, the protective shell 1 is used to shield radiation and has a receiving cavity 11; the radiation source 2 is located in the receiving cavity 11; the detector 3 is located in the receiving cavity 11, and one of the products to be inspected and the reference products is suitable to be placed between the radiation source 2 and the detector 3 to receive scanning from the radiation source 2; the weighing device 4 is located in the receiving cavity 11 and is used to weigh the products to be inspected to obtain product weight information, and to weigh the reference products to obtain reference weight information; the control device 5 is communicatively connected to the radiation source 2, the detector 3 and the weighing device 4.

[0068] The control device 5 is used for: controlling the beam output of the X-ray source 2; receiving the two-dimensional distribution image of the X-ray attenuation plane of the product to be inspected output by the detector 3 as a first image; retrieving a pre-stored two-dimensional distribution image of the X-ray attenuation plane of a reference product as a second image, or receiving the two-dimensional distribution image of the X-ray attenuation plane of a reference product output by the detector 3 as a second image; receiving product weight information from the weighing device; retrieving pre-stored reference weight information, or receiving the reference weight information from the weighing device; determining weight difference information based on the product weight information and the reference weight information; determining the peak signal-to-noise ratio (PSNR) of the two-dimensional distribution images of the X-ray attenuation plane of the product to be inspected and the reference product based on the first image and the second image, wherein the PSNR characterizes the overall similarity between the product to be inspected and the reference product; determining the subtraction value of the two-dimensional distribution images of the X-ray attenuation plane of the product to be inspected and the reference product based on the first image and the second image, wherein the subtraction value characterizes the local difference between the product to be inspected and the reference product; and determining the risk level of the product to be inspected based on the weight difference information, the PSNR, and the subtraction value, wherein the risk level includes different risk grades.

[0069] Understandably, placing the radiation source 2, detector 3, and weighing device 4 inside the protective housing 1 allows for the shielding of radiation when the radiation source 2 emits its beam to inspect the product to be inspected and the reference product, thus protecting security personnel and reducing the health damage caused by radiation to them. The receiving cavity 11 facilitates the placement of the radiation source 2, detector 3, and weighing device 4 within the protective housing 1.

[0070] It should be noted that when implementing the risk detection method for electronic products, the risk detection equipment 100 needs to detect the product to be inspected and the reference product separately to obtain the product weight information and first image of the product to be inspected, and to obtain the reference weight information and second image of the reference product. Therefore, one of the product to be inspected and the reference product is used to describe the product placed between the radiation source 2 and the detector 3. It should be understood that when the reference product is detected, the product placed between the radiation source 2 and the detector 3 is the reference product; when the product to be inspected is detected, the product placed between the radiation source 2 and the detector 3 is the product to be inspected. The understanding of one of the product to be inspected and the reference product in the following text is the same as above, and will not be repeated below. After the reference product is detected, the reference weight information and the second image of the reference product can be stored in the control device 5. When detecting the risk level of multiple products to be inspected, the risk level of each product to be inspected can be determined by retrieving the pre-stored reference weight information and the second image of the reference product, without having to detect the reference product every time.

[0071] According to the risk detection device 100 of this disclosure, by placing the radiation source 2, detector 3, and weighing device 4 inside a protective shell 1, the protective shell 1 can shield the radiation, protecting the health of security personnel when the radiation source 2 and detector 3 are working. This disclosure allows the product to be inspected to be placed directly into the weighing device 4 for inspection, eliminating the need for a conveyor belt and reducing the size of the risk detection device 100, thus reducing its footprint. Furthermore, compared to portable X-ray inspection devices in related technologies, the risk detection device 100 of this disclosure has a protective shell 1, thus eliminating the need for a large protective distance during inspection, making its application more flexible. In addition, this disclosure can implement a risk detection method for electronic products through a control device 5. This risk detection method can combine weight information and a two-dimensional distribution image of radiation attenuation plane to comprehensively judge the risk level of the product to be inspected, expanding the dimensions of risk level judgment and making the risk level judgment of the product to be inspected more accurate. Furthermore, this disclosure can uncover the overall similarity between the product under test and the reference product through the peak signal-to-noise ratio (PSNR), and can uncover the local differences between the product under test and the reference product through the subtraction value (S / N). The first and second images used to calculate the PNR and S / N do not require high-resolution, clearly discernible X-ray images. Therefore, this disclosure can accurately detect the risk level of the product under test while requiring lower X-ray energy and dose. Lower X-ray energy and dose will reduce detection costs and reduce protection difficulties.

[0072] In some embodiments, security personnel may include all persons near the risk detection device 100 during the security check, including but not limited to operators of the risk detection device 100 and owners of electronic products. Communication connections may include signal connections and electrical connections, with electrical connections including wire connections.

[0073] In some examples, the X-ray source 2 can be a high voltage of 30kV, with an average current of 0.5 to 1.0mA and a beam angle of 60 to 90 degrees. The detector 3 can be 30-40cm away from the X-ray source target, with an effective acquisition area of ​​30cm×30cm and a spatial resolution of 200×200μm.

[0074] In some examples, the weighing device 4 can measure weights from 1 to 5000 g with an accuracy of 0.1 g. In some examples, as shown in Figure 6, the control device 5 can be located inside the housing 11; in other examples, the control device 5 can be located outside the protective housing 1.

[0075] According to some embodiments of this disclosure, as shown in FIG6, the weighing device 4 may include a weighing actuator 41 and a weighing processor 42. The weighing actuator 41 is disposed in the receiving cavity 11, and one of the product to be inspected and the reference product is adapted to be placed in the weighing actuator 41. The weighing actuator 41 generates a weight signal. The weighing processor 42 is communicatively connected to both the weighing actuator 41 and the control device 5, receives the weight signal, processes the weight signal to obtain weight information, and sends the weight information to the control device 5. Thus, through the weighing actuator 41 and the weighing processor 42, the weighing device 4 can easily weigh one of the product to be inspected and the reference product, obtain weight information, and transmit the weight information to the control device 5.

[0076] According to some embodiments of this disclosure, as shown in FIG6, a weighing actuator 41 is disposed between the X-ray source 2 and the detector 3. One of the product to be inspected and the reference product is suitable for placement on the weighing actuator 41 to be scanned by the X-ray source 2, and the weighing actuator 41 generates a weight signal. Therefore, the weighing actuator 41 can support one of the product to be inspected and the reference product for X-ray scanning, and can also weigh one of the product to be inspected and the reference product. Since the weighing actuator 41 acts as a support, there is no need to set up a separate support, making the risk detection equipment 100 small in overall size, occupying a small area, and having low manufacturing cost.

[0077] In some embodiments of this disclosure, as shown in FIG6, in the vertical direction, the X-ray source 2 is positioned above the weighing actuator 41, and the detector 3 is positioned below the weighing actuator 41.

[0078] Alternatively, in the vertical direction, the X-ray source 2 is positioned below the weighing actuator 41, and the detector 3 is positioned above the weighing actuator 41.

[0079] Both of the above methods can facilitate the arrangement of the X-ray source 2, the weighing actuator 41 and the detector 3, making it easy to place the weighing actuator 41 between the X-ray source 2 and the detector 3.

[0080] In some embodiments of this disclosure, in the left-right direction, the X-ray source 2 is located on the left side of the weighing actuator 41, and the detector 3 is located on the right side of the weighing actuator 41.

[0081] Alternatively, in the left-right direction, the X-ray source 2 is located on the right side of the weighing actuator 41, and the detector 3 is located on the left side of the weighing actuator 41.

[0082] Both of the above methods can facilitate the arrangement of the X-ray source 2, the weighing actuator 41 and the detector 3, making it easy to place the weighing actuator 41 between the X-ray source 2 and the detector 3.

[0083] In some embodiments of this disclosure, the weighing actuator 41 is provided with a first fixing part, which fixes one of the product to be inspected and the reference product so that the scanning surface of one of the product to be inspected and the reference product is parallel to the area between the X-ray source 2 and the detector 3. It is understood that since the shape of one of the product to be inspected and the reference product may be inconvenient for placement, i.e., it may tip over or tilt after placement, making it impossible for the scanning surface of one of the product to be inspected and the reference product to be located between the X-ray source 2 and the detector 3, the first fixing part facilitates fixing one of the product to be inspected and the reference product so that the scanning surface of one of the product to be inspected and the reference product is parallel to the area between the X-ray source 2 and the detector 3, thus facilitating the completion of the inspection.

[0084] In some embodiments of this disclosure, in the front-back direction, the X-ray source 2 is located in front of the weighing actuator 41, and the detector 3 is located behind the weighing actuator 41.

[0085] Alternatively, in the front-to-back direction, the radiation source 2 is located behind the weighing actuator 41, and the detector 3 is located in front of the weighing actuator 41.

[0086] Both of the above methods can facilitate the arrangement of the X-ray source 2, the weighing actuator 41 and the detector 3, making it easy to place the weighing actuator 41 between the X-ray source 2 and the detector 3.

[0087] In some embodiments of this disclosure, the weighing actuator 41 is provided with a second fixing part, which fixes one of the product to be inspected and the reference product so that the scanning surface of one of the product to be inspected and the reference product is parallel to the area between the X-ray source 2 and the detector 3. It is understood that since the shape of one of the product to be inspected and the reference product may be inconvenient for placement, i.e., it may tip over or tilt after placement, making it impossible for the scanning surface of one of the product to be inspected and the reference product to be located between the X-ray source 2 and the detector 3, the second fixing part facilitates fixing one of the product to be inspected and the reference product so that the scanning surface of one of the product to be inspected and the reference product is parallel to the area between the X-ray source 2 and the detector 3, thus facilitating the completion of the inspection.

[0088] In some embodiments of this disclosure, in the vertical direction, the X-ray source 2 is positioned above one of the product to be inspected and the reference product. One of the product to be inspected and the reference product is positioned on the detector 3. The detector 3 and one of the product to be inspected and the reference product are integrally mounted on the weighing actuator 41, which generates a weight signal. In some examples, the detector 3 may have a support member. One of the product to be inspected and the reference product is positioned on the support member. After the weighing actuator 41 weighs the detector 3, one of the product to be inspected and the reference product, and the support member as a whole, the overall weight is transmitted to the weighing processor 42. The weighing processor 42 may pre-store the weight of the detector 3 and the support member. The weighing processor 42 can calculate the weight information of one of the product to be inspected and the reference product, and then transmit the weight information to the control device 5. This method also facilitates the arrangement of the X-ray source 2, the weighing actuator 41, and the detector 3, enabling the inspection of one of the product to be inspected and the reference product.

[0089] According to some embodiments of this disclosure, when the radiation source and detector are arranged vertically, the weighing actuator is located between the radiation source and detector, and the weighing processor is located in the receiving cavity and to the side of the weighing actuator. This avoids the influence of the radiation source on the weighing processor, resulting in more accurate processing results from the weighing processor.

[0090] When the X-ray source and detector are arranged in the front-back or left-right direction, the weighing actuator is located between the X-ray source and detector, and the weighing processor is located in the receiving cavity, below the weighing actuator. This allows for easier association between the weighing processor and the weighing actuator without affecting the accuracy of the weighing processor, facilitating the placement of the weighing processor.

[0091] In some embodiments of this disclosure, the weighing actuator 41 may include a tray and a weight sensor. One of the product to be inspected and the reference product is suitable for placement on the tray; the weight sensor is connected to the tray and generates a weight signal based on the load on the tray. The weight sensor is also communicatively connected to the weighing processor 42 and sends the weight signal to the weighing processor 42. This facilitates the generation of a weight signal by the weighing actuator 41, thereby enabling the weighing device 4 to weigh one of the product to be inspected and the reference product to obtain weight information.

[0092] In some examples, the tray can be made of stainless steel with a thickness of 0.1-0.3 mm.

[0093] In some examples, the weighing processor may include a signal amplifier, a digital-to-analog converter (DAC), and a data processor. The signal amplifier receives the weight signal, amplifies it, and transmits it to the DAC. The DAC converts the analog signal of the weight signal into a digital signal and transmits it to the data processor. The data processor calculates the weight information corresponding to the weight signal based on the digital signal. The unit of the weight information may be grams, kilograms, or jin (a Chinese unit of weight, approximately 0.5 catties), etc.

[0094] According to some embodiments of this disclosure, as shown in FIG6, the receiving cavity 11 has an opening, which can be located on the side or top of the protective shell 1. It is understood that the opening facilitates security personnel placing one of the product to be inspected and the reference product between the radiation source 2 and the detector 3, and also facilitates security personnel removing one of the product to be inspected and the reference product from the receiving cavity 11. The opening can be located at any convenient position for placing or removing one of the product to be inspected and the reference product, thereby improving inspection efficiency.

[0095] According to some embodiments of this disclosure, as shown in FIG6, a switchable door 12 is provided at the opening to open and close the opening. The switchable door 12 may include a swing door, a side door, or a double door. The switchable door 12 can be used to open and close the opening, facilitating the placement or removal of either the product to be inspected or the reference product. For example, the switchable door 12 can be a radiation protection door; during radiation detection, closing the opening with the switchable door 12 can prevent radiation leakage. The configuration of the switchable door can be selected according to the structure of the risk detection equipment and the available space, facilitating its opening and closing.

[0096] According to some embodiments of this disclosure, the risk detection device may further include a first safety interlock, which includes a first locking part and a second locking part. The first locking part is located at the open opening, and the second locking part is located at the door. The first safety interlock is communicatively connected to a control device. When the first locking part and the second locking part are engaged, the control device can control the emission of the radiation source beam. It is understood that when the door is open, the first and second locking parts are not engaged, and the control device cannot control the emission of the radiation source beam. When the door is closed, and the first and second locking parts are engaged, the control device can control the emission of the radiation source beam. Therefore, radiation leakage problems caused by performing radiation detection when the open opening is not closed can be avoided. The door is made of a material with radiation shielding effect.

[0097] According to some embodiments of this disclosure, the drawer is designed to be slidably opened and closed. The drawer includes a carrying section and a sealing section, connected to each other. The carrying section is located between the radiation source and the detector. One of the products to be inspected or a reference product is suitable for placement in the carrying section. When the drawer is pushed into the open opening, the sealing section seals the opening. The sealing section is made of a material with radiation shielding properties. The drawer structure allows for a smaller size and footprint of the risk detection equipment.

[0098] According to some embodiments of this disclosure, the risk detection device may further include a second safety interlock, which includes a third locking part and a fourth locking part. The third locking part is located at the open opening, and the fourth locking part is located in the drawer. The second safety interlock is communicatively connected to a control device. When the third and fourth locking parts are engaged, the control device can control the emission of the radiation source beam. It is understood that when the drawer is pulled out, the third and fourth locking parts are not engaged, and the control device cannot control the emission of the radiation source beam. When the drawer is pushed in, and the third and fourth locking parts are engaged, the control device can control the emission of the radiation source beam. Therefore, radiation leakage problems caused by performing radiation detection when the drawer is not fully pushed into the open opening can be avoided.

[0099] According to some embodiments of this disclosure, the risk detection device may also include a power supply device to supply power to the components of the risk detection device that require electricity.

[0100] According to some embodiments of this disclosure, the risk detection device may also include a control panel, which is communicatively connected to a control device. The control panel can be used to operate the X-ray source to emit and stop the beam, and can display the final conclusion on whether the product under inspection has been modified or whether there is a safety risk.

[0101] Those skilled in the art will understand that the features described in the various embodiments of this disclosure can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments of this disclosure can be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0102] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the embodiments thereof and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be determined not only by the above embodiments but also by their equivalents.

Claims

1. A risk detection method for electronic products, comprising: Obtain the product weight information of the product to be inspected and the reference weight information of the reference product; Based on the product weight information and the baseline weight information, determine the weight difference information; A two-dimensional planar distribution image of the radiation attenuation degree of the product to be inspected is obtained as the first image; A two-dimensional planar distribution image of the ray attenuation of the reference product is obtained as a second image; Based on the first image and the second image, the peak signal-to-noise ratio (PSNR) of the two-dimensional distribution image of the ray attenuation plane of the product under test and the reference product is determined, wherein the PSNR characterizes the overall similarity between the product under test and the reference product. Based on the first image and the second image, the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product under test and the reference product is determined, wherein the subtraction value characterizes the local difference between the product under test and the reference product; The risk level of the product to be inspected is determined based on the weight difference information, the peak signal-to-noise ratio, and the subtraction value, wherein the risk level includes different risk grades.

2. The risk detection method for electronic products according to claim 1, wherein, The step of determining the peak signal-to-noise ratio of the two-dimensional distribution images of the ray attenuation plane of the product under inspection and the reference product based on the first image and the second image includes: Obtain the detector output value of each pixel in the m×n pixels of the first image as the first output value, where m represents the row m of the m×n pixels, n represents the column n of the m×n pixels, and m and n are both integers greater than or equal to 1; Obtain the detector output value of each pixel in the m×n pixels of the second image, and use it as the second output value; Based on the first output value and the second output value, calculate the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product under test and the reference product.

3. The risk detection method for electronic products according to claim 1, wherein, The step of determining the subtraction value of the two-dimensional distribution image of the X-ray attenuation plane of the product under inspection and the reference product based on the first image and the second image includes: When the product to be inspected exists between the X-ray source and the detector, the output value of the detector for each pixel in the x×y pixels of the selected pixel area of ​​the product to be inspected is obtained as the third output value, where x represents the row x of the x×y pixels, y represents the column y of the x×y pixels, and x and y are both integers greater than or equal to 1. The output value of the detector for each pixel in the x×y pixels of the selected pixel area of ​​the reference product is obtained as the fourth output value; When there is no product between the radiation source and the detector, the output value of the detector for each of the x×y pixels is obtained as the fifth output value; Based on the third, fourth, and fifth output values, calculate the subtraction value of the two-dimensional distribution image of the ray attenuation plane between the product under inspection and the reference product.

4. The risk detection method for electronic products according to any one of claims 1-3, wherein, The step of determining the risk level of the product to be inspected based on the weight difference information, the peak signal-to-noise ratio, and the subtraction value includes: Compare the weight difference information with a first preset threshold. Compare the peak signal-to-noise ratio with a second preset threshold; Compare the subtraction value with a third preset threshold; When any one of the weight difference information, the peak signal-to-noise ratio and the subtraction value fails to meet the corresponding set threshold, the risk level of the product to be inspected is determined to be high risk. When the weight difference information, the peak signal-to-noise ratio, and the subtraction value all meet the corresponding set thresholds, the risk level of the product to be inspected is determined to be low risk.

5. The risk detection method for electronic products according to any one of claims 1-3, wherein, The step of determining the risk level of the product to be inspected based on the weight difference information, the peak signal-to-noise ratio, and the subtraction value includes: The weight difference information is matched with a first set risk level library to obtain a first risk level, wherein the first set risk level library includes different risk levels; The peak signal-to-noise ratio is matched with a second set risk level library to obtain a second risk level, wherein the second set risk level library includes different risk levels; The subtraction value is matched with a third set risk level library to obtain a third risk level, wherein the third set risk level library includes different risk levels; The risk level of the product to be inspected is determined based on the first risk level, the second risk level, and the third risk level.

6. A risk detection device for electronic products, comprising: A protective shell for shielding radiation, the protective shell having a receiving cavity; A radiation source, wherein the radiation source is disposed in the receiving cavity; A detector is disposed in the receiving cavity, and one of the product to be inspected and the reference product is adapted to be placed between the radiation source and the detector to be scanned by the radiation source; A weighing device is provided in the receiving cavity for weighing the product to be inspected to obtain product weight information, and for weighing the reference product to obtain reference weight information. The control device, which is communicatively connected to the radiation source, the detector, and the weighing device, is used for: Control the beam output of the radiation source; Receive the two-dimensional planar distribution image of the radiation attenuation degree of the product under test output by the detector, as the first image; Retrieve a pre-stored two-dimensional distribution image of the ray attenuation plane of the reference product as a second image, or receive a two-dimensional distribution image of the ray attenuation plane of the reference product output by the detector as a second image; Receive product weight information from the weighing device; Retrieve pre-stored reference weight information, or receive reference weight information from the weighing device; Based on the product weight information and the baseline weight information, determine the weight difference information; Based on the first image and the second image, the peak signal-to-noise ratio (PSNR) of the two-dimensional distribution image of the ray attenuation plane of the product under test and the reference product is determined, wherein the PSNR characterizes the overall similarity between the product under test and the reference product. Based on the first image and the second image, the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product under test and the reference product is determined, wherein the subtraction value characterizes the local difference between the product under test and the reference product; The risk level of the product to be inspected is determined based on the weight difference information, the peak signal-to-noise ratio, and the subtraction value, wherein the risk level includes different risk grades.

7. The risk detection device for electronic products according to claim 6, wherein, The weighing device includes: A weighing actuator is disposed in the receiving cavity, one of the product to be inspected and the reference product is adapted to be placed in the weighing actuator, and the weighing actuator generates a weight signal; The weighing processor is communicatively connected to both the weighing actuator and the control device. It receives the weight signal, processes the weight signal to obtain one of the product weight information and the reference weight information, and sends one of the product weight information and the reference weight information to the control device.

8. The risk detection device for electronic products according to claim 7, wherein, The weighing actuator is located between the X-ray source and the detector. One of the product to be inspected and the reference product is adapted to be placed on the weighing actuator to be scanned by the X-ray source. The weighing actuator generates a weight signal.

9. The risk detection device for electronic products according to claim 8, wherein, In the vertical direction, the radiation source is positioned above the weighing actuator, and the detector is positioned below the weighing actuator. Alternatively, in the vertical direction, the radiation source is positioned below the weighing actuator, and the detector is positioned above the weighing actuator.

10. The risk detection device for electronic products according to claim 8, wherein, In the left-right direction, the radiation source is located on the left side of the weighing actuator, and the detector is located on the right side of the weighing actuator; Alternatively, in the left-right direction, the radiation source is located on the right side of the weighing actuator, and the detector is located on the left side of the weighing actuator.

11. The risk detection device for electronic products according to claim 10, wherein, The weighing actuator is provided with a first fixing part, which fixes one of the product to be inspected and the reference product, so that the scanning surface of one of the product to be inspected and the reference product is parallel to the X-ray source and the detector.

12. The risk detection device for electronic products according to claim 8, wherein, In the front-to-back direction, the radiation source is located in front of the weighing actuator, and the detector is located behind the weighing actuator. Alternatively, in the front-to-back direction, the radiation source is located behind the weighing actuator, and the detector is located in front of the weighing actuator.

13. The risk detection device for electronic products according to claim 12, wherein, The weighing actuator is provided with a second fixing part, which fixes one of the product to be inspected and the reference product so that the scanning surface of one of the product to be inspected and the reference product is parallel to the X-ray source and the detector.

14. The risk detection device for electronic products according to claim 7, wherein, In the vertical direction, the radiation source is positioned above the detector, and the detector is positioned above the weighing actuator.

15. The risk detection device for electronic products according to claim 7, wherein, When the radiation source and the detector are arranged vertically, the weighing actuator is located between the radiation source and the detector, and the weighing processor is located in the receiving cavity and on the side of the weighing actuator. When the radiation source and the detector are arranged in the front-back direction or the left-right direction, the weighing actuator is located between the radiation source and the detector, and the weighing processor is located in the receiving cavity and below the weighing actuator.

16. The risk detection device for electronic products according to any one of claims 7-15, wherein, The weighing actuator includes: A tray, wherein one of the product to be inspected and the reference product is adapted to be placed on the tray; A weight sensor is connected to the pallet and generates a weight signal based on the load on the pallet. The weight sensor is also communicatively connected to the weighing processor and sends the weight signal to the weighing processor.

17. The risk detection device for electronic products according to any one of claims 6-15, wherein, The receiving cavity has an opening located on the side or top of the protective shell.

18. The risk detection device for electronic products according to claim 17, wherein, The opening is provided with a switch door to open and close the opening, and the switch door includes a swing door, a side door, or a double door.

19. The risk detection device for electronic products according to claim 18, further comprising: The first safety interlock includes a first locking part and a second locking part. The first locking part is located at the open opening, and the second locking part is located at the door. The first safety interlock is communicatively connected to the control device. When the first locking part and the second locking part cooperate, the control device can control the beam output of the radiation source.

20. The risk detection device for electronic products according to claim 17, wherein, The drawer is designed to be slidably disposed at the opening to close and open the opening. The drawer includes a carrying part and a sealing part, the carrying part being connected to the sealing part. The carrying part is located between the radiation source and the detector. One of the product to be inspected and the reference product is adapted to be placed in the carrying part. When the drawer is pushed into the opening, the sealing part seals the opening.

21. The risk detection device for electronic products according to claim 20, further comprising: The second safety interlock includes a third locking part and a fourth locking part. The third locking part is located at the opening, and the fourth locking part is located in the drawer. The second safety interlock is communicatively connected to the control device. When the third locking part and the fourth locking part are engaged, the control device can control the beam output of the radiation source.

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