Risk detection method and risk detection equipment for electronic product

Abstract

The invention provides a risk detection method and risk detection equipment for an electronic product, and is applied to the technical field of ray detection. The method comprises the following steps: determining weight difference information according to obtained product weight information and reference weight information; according to the obtained first image and the second image, the peak signal-to-noise ratio of the ray attenuation degree plane two-dimensional distribution images of the to-be-detected product and the reference product is determined, and the peak signal-to-noise ratio represents the overall similarity between the to-be-detected product and the reference product; according to the obtained first image and second image, the subtraction value of the ray attenuation degree plane two-dimensional distribution image of the product to be detected and the reference product is determined, and the subtraction value represents the local difference between the product to be detected and the reference product; and determining the risk degree of the to-be-detected product according to the weight difference information, the peak signal-to-noise ratio and the subtraction value. According to the invention, the detection cost and the protection difficulty can be reduced through low ray energy and dosage.

Description

Technical Field

[0001] The present invention relates to the technical field of radiation safety detection, and more specifically, to a risk detection method and risk detection equipment for electronic products. Background Art

[0002] In the prior art, there is no security inspection equipment specifically used to detect whether electronic products such as mobile phones, tablets and smart wearable devices have been modified. Traditional X-ray security inspection equipment mainly focuses on relatively large dangerous items, such as controlled knives, firearms and ammunition, and flammable and explosive items. Traditional X-ray security inspection equipment requires a transmission device, and the equipment is large in size and occupies a large area. Another type of portable X-ray inspection equipment is mainly used for explosion-proof inspection. Since portable X-ray inspection equipment has no protective device, a relatively large protective distance is required during inspection, and the use scenario is limited.

[0003] In summary, the two types of X-ray security inspection equipment are not suitable for inspecting electronic products such as mobile phones and tablets. Therefore, in the field of electronic product security inspection, there is no good means to inspect the additional modification of electronic products, the addition of small chips in electronic products, the modification of circuits, and / or the dangerous behavior of storing a small amount of explosives in electronic products. Electronic products have become a hidden danger that threatens people's health and property safety. Moreover, the detection method algorithm used by the above two types of X-ray security inspection equipment is complex, and requires high-resolution and clearly judged X-ray images to determine the danger of the inspected products and whether they have been modified. This requires high radiation energy and dose, and higher radiation energy and dose will increase the detection cost and increase the difficulty of protection. Summary of the invention

[0004] In order to solve the above problems in the prior art, an embodiment of the present invention provides a risk detection method and a risk detection device for an electronic product. The risk detection method for an electronic product has the advantages of accurate detection, low cost and low protection difficulty.

[0005] One aspect of the present invention provides a risk detection method for electronic products, comprising: obtaining 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; obtaining a two-dimensional distribution image of the ray attenuation plane of the product to be inspected as a first image; obtaining a two-dimensional distribution image of the ray attenuation plane of the reference product as a second image; determining a peak signal-to-noise ratio of the two-dimensional distribution images of the ray attenuation plane of the product to be inspected and the reference product based on the first image and the second image, wherein the peak signal-to-noise ratio represents the overall similarity between the product to be inspected and the reference product; determining a subtraction value of the two-dimensional distribution images of the 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 represents the local difference between the product to be inspected and the reference product; 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, wherein the risk level includes different risk levels.

[0006] According to the risk detection method for electronic products of the embodiment of the present invention, the risk level of the product to be inspected can be comprehensively judged by combining weight information and the two-dimensional distribution image of the radiation attenuation plane, which expands the dimension of the risk level judgment of the product to be inspected, making the risk level judgment of the product to be inspected more accurate. In addition, the present invention can mine the overall similarity between the product to be inspected and the reference product through the peak signal-to-noise ratio, and can mine the local difference between the product to be inspected and the reference product through the subtraction value. The first image and the second image used to calculate the peak signal-to-noise ratio and the subtraction value do not require high-resolution and clearly judged radiation images. Therefore, the present invention can accurately detect the risk level of the product to be inspected, and the required radiation energy and dose are relatively low. Lower radiation energy and dose will reduce detection costs and reduce protection difficulties.

[0007] Another aspect of the present invention provides a risk detection device for electronic products, comprising: a protective shell for shielding radiation, the protective shell having a accommodating cavity; a radiation source, the radiation source being disposed in the accommodating cavity; a detector, the detector being disposed in the accommodating cavity, and one of the product to be inspected and the reference product being suitable for being placed between the radiation source and the detector to be scanned by the radiation source; a weighing device, the weighing device being disposed in the accommodating cavity, and being used to weigh the product to be inspected to obtain product weight information, and to weigh the reference product to obtain reference weight information; a control device, the control device being communicatively connected to the radiation source, the detector and the weighing device, and being used to: control the radiation source to emit a beam; receive a two-dimensional distribution image of the radiation attenuation of the product to be inspected output by the detector as a first image; retrieve a pre-stored two-dimensional distribution image of the radiation attenuation of the reference product output by the detector as a second image, or receive a pre-stored two-dimensional distribution image of the radiation attenuation of the reference product output by the detector as a second image; a two-dimensional distribution image of the ray attenuation plane of the product as the second image; receiving the product weight information of the weighing device; retrieving the pre-stored reference weight information, or receiving the reference weight information of the weighing device; determining the weight difference information according to the product weight information and the reference weight information; determining the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product according to the first image and the second image, wherein the peak signal-to-noise ratio represents the overall similarity between the product to be inspected and the reference product; determining the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product according to the first image and the second image, wherein the subtraction value represents the local difference between the product to be inspected and the reference product; determining the risk level of the product to be inspected according to the weight difference information, the peak signal-to-noise ratio and the subtraction value, wherein the risk level includes different risk levels.

[0008] According to the risk detection equipment of the embodiment of the present invention, by arranging the radiation source, the detector and the weighing device in a protective shell, the protective shell can shield the radiation, and can protect the health of the security personnel when the radiation source and the detector are working. The present invention can directly put the product to be inspected into the weighing device for detection, and can realize the detection of the product to be inspected without a conveyor belt, which can reduce the volume of the risk detection equipment, thereby reducing the footprint of the risk detection equipment. In addition, compared with the portable X-ray inspection equipment in the prior art, the risk detection equipment of the present invention has a protective shell, so a relatively large protection distance is not required during detection, and the usage scenario is flexible. In addition, the present invention can implement the risk detection method of electronic products through the control device, and the risk detection method can combine the weight information and the two-dimensional distribution image of the radiation attenuation plane to comprehensively judge the risk level of the product to be inspected, which expands the dimension of the risk level judgment of the product to be inspected, so that the risk level judgment of the product to be inspected is more accurate. In addition, the present invention can mine the overall similarity between the product to be inspected and the reference product through the peak signal-to-noise ratio, and can mine the local difference between the product to be inspected and the reference product through the subtraction value. The first image and the second image used to calculate the peak signal-to-noise ratio and the subtraction value do not require high-resolution, clearly identifiable radiographic images. Therefore, the present invention can accurately detect the risk level of the product to be inspected while requiring lower radiation energy and dose. Lower radiation energy and dose will reduce detection costs and reduce protection difficulty.

[0009] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] For a more complete understanding of the present invention and its advantages, reference will now be made to the following description taken in conjunction with the accompanying drawings, in which:

[0011] Figure 1 is a flow chart of a risk detection method for an electronic product according to an embodiment of the present invention;

[0012] Figure 2 is a flowchart of the steps of determining the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product according to the first image and the second image according to an embodiment of the present invention;

[0013] Figure 3 is a flowchart of the steps of determining the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product according to the first image and the second image according to an embodiment of the present invention;

[0014] Figure 4 is a flow chart of 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 invention;

[0015] Figure 5 is a flowchart of 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 invention;

[0016] Figure 6 is a schematic diagram of the structure of a risk detection device according to an embodiment of the present invention.

[0017] Reference numerals:

[0018] Risk detection device 100,

[0019] Protective shell 1, accommodating chamber 11, switch door 12,

[0020] Radiation source 2, detector 3,

[0021] Weighing device 4, weighing actuator 41, weighing processor 42,

[0022] Control device 5. DETAILED DESCRIPTION

[0023] Hereinafter, embodiments of the present invention will 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 the present invention. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention. In addition, the technical features in the various embodiments and embodiments provided below of the present invention can be combined with each other in any manner.

[0024] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. In addition, the terms "including", "comprising", etc. used herein indicate the presence of the 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 (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0025] In the field of electronic product security inspection, there is no good way to inspect the additional modifications to electronic products, the addition of small chips to electronic products, the change of circuits, and / or the dangerous behavior of storing small amounts of explosives in electronic products. Electronic products have become a hidden danger that threatens people's health and property safety.

[0026] Reference below Figure 1-Figure 6 A risk detection method and a risk detection device for an electronic product according to an embodiment of the present invention are described.

[0027] like Figure 1 As shown, the risk detection method for an electronic product according to an embodiment of the present invention includes operations S110 to S170.

[0028] In operation S110, obtain the product weight information of the product to be inspected and the reference weight information of the reference product. It is understandable that the product weight information of the product to be inspected can be measured by the weighing device in the risk detection equipment of the electronic product, and the weighing device transmits the product weight information to the control device in the risk detection equipment. The reference weight information of the reference product can be pre-measured by the weighing device in the risk detection equipment of the electronic product, and pre-stored in the control device in the risk detection equipment. When the reference weight information is needed, the reference weight information can be directly retrieved. Of course, the reference weight information can also be measured by the weighing device in the risk detection equipment of the electronic product each time it is used, and the weighing device transmits the reference weight information to the control device in the risk detection equipment. Acquiring the reference weight information of the present invention includes retrieving the reference weight information from the control device or receiving the reference weight information from the weighing device.

[0029] In operation S120, weight difference information is determined based on the product weight information and the reference weight information. In some examples, the weight difference information may 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 may calculate the weight difference information.

[0030] In operation S130, a two-dimensional distribution image of the radiation attenuation of the product to be inspected is obtained as the first image. It can be understood that the product to be inspected is placed in the risk detection device, the radiation source in the risk detection device performs radiation scanning on the product to be inspected, the detector receives the scanning signal, and outputs the two-dimensional distribution image of the radiation attenuation of the product to be inspected as the first image, and the detector transmits the first image to the control device.

[0031] In operation S140 , a two-dimensional distribution image of a ray attenuation plane of a reference product is acquired as a second image.

[0032] It can be understood that the acquisition here includes calling or receiving. When the acquisition includes calling, the two-dimensional distribution image (second image) of the ray attenuation plane of the reference product is data pre-stored after the detector is measured. When the two-dimensional distribution image (second image) of the ray attenuation plane of the reference product is needed, it can be directly called. When the acquisition includes receiving, the reference product needs to be placed in the risk detection device, the radiation source in the risk detection device performs a ray scan on the reference product, the detector receives the scanning signal, and outputs the two-dimensional distribution image of the ray 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.

[0033] In operation S150, the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product is determined based on the first image and the second image, wherein the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product represents the overall similarity between the product to be inspected and the reference product.

[0034] After the control device acquires the first image and the second image, the peak signal-to-noise ratio of the two-dimensional distribution image of the radiation attenuation plane of the product to be inspected and the reference product can be determined based on the first image and the second image. As a possible implementation method, Figure 2 As shown, operation S150 is a step of determining the peak signal-to-noise ratio of the two-dimensional distribution images of the radiation attenuation plane of the product to be inspected and the reference product according to the first image and the second image, and includes operations S151 to S153.

[0035] In operation S151, the detector output value of each pixel of the m×n pixels of the first image is obtained as the first output value, where m represents row m of the m×n pixels, n represents 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.

[0036] In operation S152, a detector output value of each pixel point among the m×n pixels of the second image is obtained as a second output value.

[0037] In operation S153, the peak signal-to-noise ratios of the two-dimensional distribution images of the radiation attenuation planes of the product to be inspected and the reference product are calculated according to the first output value and the second output value.

[0038] In some examples, the detector may output the output value of each of the m×n pixels of the first image, and transmit it to the control device as the first output value; the detector may output the output value of each of the m×n pixels of the second image, and transmit it to the control device as the second output value, or may retrieve the output value of each of the m×n pixels of the second image output by the detector that is pre-stored, and use it as the second output value; after the control device obtains the first output value and the second output value, it may calculate the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product according to formula (1) and formula (2).

[0039] In some specific examples:

[0040] (1)

[0041] (2)

[0042] Wherein, PSNR represents the peak signal-to-noise ratio of the two-dimensional distribution images of the radiation attenuation plane of the product to be inspected 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, represents the first output value of the i-th row and j-th column, Represents the second output value of the i-th row and j-th column.

[0043] Formula (1) and formula (2) can be used to easily calculate the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product according to the first output value and the second output value.

[0044] Operations S151 to S153 can facilitate the step of determining the peak signal-to-noise ratio of the two-dimensional distribution images of the radiation attenuation plane of the product to be inspected and the reference product based on the first image and the second image.

[0045] In operation S160, a subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product is determined according to the first image and the second image, wherein the subtraction value represents the local difference between the product to be inspected and the reference product.

[0046] After the control device acquires the first image and the second image, the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product can be determined based on the first image and the second image. As a possible implementation method, Figure 3 As shown, operation S160 is a step of determining the subtraction value of the two-dimensional distribution image of the radiation attenuation plane of the product to be inspected and the reference product according to the first image and the second image, and includes operations S161 to S164.

[0047] In operation S161, when there is a product to be inspected between the radiation source and the detector, the output value of the detector of each x×y pixel points of the selected pixel area of ​​the product to be inspected is obtained as the third output value, wherein x represents the row x of the x×y pixel points, y represents the column y of the x×y pixel points, x is an integer greater than or equal to 1, and y is an integer greater than or equal to 1.

[0048] In operation S162, the output value of the detector of each of the x×y pixels of the selected pixel area of ​​the reference product is obtained as the fourth output value. Here, the output value of the detector of each of the x×y pixels of the selected pixel area of ​​the reference product stored in advance can be retrieved as the fourth output value; or when the reference product is between the ray source and the detector, the output value of the detector of each of the x×y pixels of the selected pixel area of ​​the reference product directly measured can be obtained as the fourth output value.

[0049] In operation S163, when there is no product between the ray source and the detector, an output value of the detector of each pixel point among the x×y pixel points is obtained as a fifth output value.

[0050] In operation S164, a subtraction value of the two-dimensional distribution image of the radiation attenuation plane of the product to be inspected and the reference product is calculated according to the third output value, the fourth output value, and the fifth output value.

[0051] In some examples, the selected pixel area may be a dangerous area, which may be understood as an area where dangerous items (such as explosives, added small chips) may be hidden and need special attention. The detector may output the output value of each of the x×y pixels of the selected pixel area of ​​the product to be inspected, and transmit it to the control device as the third output value; the detector may output the output value of each of the x×y pixels of the selected pixel area of ​​the reference product, and transmit it to the control device as the fourth output value, or may retrieve the output value of each of the x×y pixels of the selected pixel area of ​​the reference product stored in advance as the fourth output value; when there is no product between the radiation source and the detector, the detector may output the fifth output value of each of the x×y pixels. After the control device obtains the third output value, the fourth output value and the fifth output value, it may calculate the subtraction value of the two-dimensional distribution image of the radiation attenuation plane of the product to be inspected and the reference product according to formula (3)-formula (5).

[0052] In some specific examples:

[0053]

[0054] (3)

[0055] (4)

[0056] (5)

[0057] in, It represents the subtraction value of the two-dimensional distribution image of the ray attenuation of the product to be tested and the reference product. a represents the ath row of x×y pixels, and b represents the bth column of x×y pixels. represents the fourth output value of row a and column b, represents the third output value of row a and column b, represents the fifth output value of row a and column b, represents the intermediate value of the association formula (3) and formula (4), represents the intermediate value of the association formula (3) and formula (5). Here, the x×y pixels may be, for example, 10×20 pixels.

[0058] Formula (3) to Formula (5) can be used to easily calculate the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product according to the third output value, the fourth output value and the fifth output value.

[0059] Operations S161 to S164 can facilitate the step of determining the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product based on the first image and the second image.

[0060] In operation S170, the risk level of the product to be inspected is determined according to the weight difference information, the peak signal-to-noise ratio, and the subtraction value, wherein the risk level includes different risk grades.

[0061] As some possible implementation methods, such as Figure 4 As shown, operation S170 is a step of determining the risk level of the product to be inspected according to the weight difference information, the peak signal-to-noise ratio and the subtraction value, and includes operations S171 to S175.

[0062] In operation S171, the weight difference information is compared with a first set threshold value. For example, the first set threshold value may be set to 0.5 g.

[0063] In operation S172, the peak signal-to-noise ratio is compared with a second set threshold value. For example, the second set threshold value may be set to 30.

[0064] In operation S173, the subtracted value is compared with a third set threshold value.

[0065] In operation S174, when any one of the weight difference information, the peak signal-to-noise ratio, and the subtraction value does not meet the corresponding set threshold, it is determined that the risk level of the product to be inspected is high risk.

[0066] In operation S175 , when the weight difference information, the peak signal-to-noise ratio, and the subtraction value all meet corresponding set thresholds, it is determined that the risk level of the product to be inspected is low risk.

[0067] Operations S171 to S175 can facilitate 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.

[0068] As other possible implementation methods, Figure 5 As shown, operation S170 is a step of determining the risk level of the product to be inspected according to the weight difference information, the peak signal-to-noise ratio and the subtraction value, and includes operations S176 to S179.

[0069] In operation S176, 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.

[0070] In operation S177, 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.

[0071] In operation S178, the subtracted 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.

[0072] In operation S179, the risk level of the product to be inspected is determined according to the first risk level, the second risk level, and the third risk level.

[0073] Operations S176 to S179 can also facilitate 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.

[0074] According to the risk detection method for electronic products of the embodiment of the present invention, the risk level of the product to be inspected can be comprehensively judged by combining weight information and the two-dimensional distribution image of the radiation attenuation plane, which expands the dimension of the risk level judgment of the product to be inspected, making the risk level judgment of the product to be inspected more accurate. In addition, the present invention can mine the overall similarity between the product to be inspected and the reference product through the peak signal-to-noise ratio, and can mine the local difference between the product to be inspected and the reference product through the subtraction value. The first image and the second image used to calculate the peak signal-to-noise ratio and the subtraction value do not require high-resolution and clearly judged radiation images. Therefore, the present invention can accurately detect the risk level of the product to be inspected, and the required radiation energy and dose are relatively low. Lower radiation energy and dose will reduce detection costs and reduce protection difficulties.

[0075] like Figure 6 As shown, the risk detection device for electronic products according to an embodiment of the present invention includes a protective shell 1, a radiation source 2, a detector 3, a weighing device 4 and a control device 5.

[0076] Specifically, combined Figure 6 The protective shell 1 is used for shielding radiation and has a containing cavity 11; the radiation source 2 is arranged in the containing cavity 11; the detector 3 is arranged in the containing cavity 11, and one of the product to be inspected and the reference product is suitable for being placed between the radiation source 2 and the detector 3 to be scanned by the radiation source 2; the weighing device 4 is arranged in the containing cavity 11, and is used to weigh the product to be inspected to obtain product weight information, and is used to weigh the reference product to obtain reference weight information; the control device 5 is communicatively connected with the radiation source 2, the detector 3 and the weighing device 4.

[0077] The control device 5 is used to: control the irradiation source 2 to emit a beam; receive the two-dimensional distribution image of the ray attenuation plane of the product to be inspected output by the detector 3 as the first image; retrieve the pre-stored two-dimensional distribution image of the ray attenuation plane of the reference product as the second image, or receive the two-dimensional distribution image of the ray attenuation plane of the reference product output by the detector 3 as the second image; receive product weight information of the weighing device; retrieve the pre-stored reference weight information, or receive the reference weight information of the weighing device; determine weight difference information according to the product weight information and the reference weight information; determine the peak signal-to-noise ratio of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product according to the first image and the second image, wherein the peak signal-to-noise ratio represents the overall similarity between the product to be inspected and the reference product; determine the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product according to the first image and the second image, wherein the subtraction value represents the local difference between the product to be inspected and the reference product; determine the risk level of the product to be inspected according to the weight difference information, the peak signal-to-noise ratio and the subtraction value, wherein the risk level includes different risk levels.

[0078] It is understandable that arranging the radiation source 2, the detector 3 and the weighing device 4 in the protective shell 1 can shield the radiation when the radiation source 2 emits a beam to inspect the product to be inspected and the reference product, protect the security inspectors, and reduce the damage to the health of the security inspectors caused by the radiation. The accommodating cavity 11 can facilitate the arrangement of the radiation source 2, the detector 3 and the weighing device 4 in the protective shell 1.

[0079] It should be noted that when implementing the risk detection method for electronic products, the risk detection device 100 needs to be used to detect the product to be inspected and the reference product respectively, so as to obtain the product weight information and the first image of the product to be inspected and the reference weight information and the 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 is the same as above, and will not be repeated one by one 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 the risk level of multiple products to be inspected is detected, the risk level of each product to be inspected can be determined by calling the pre-stored reference weight information and the second image of the reference product, without the need to detect the reference product every time.

[0080] According to the risk detection device 100 of the embodiment of the present invention, by arranging the radiation source 2, the detector 3 and the weighing device 4 in the protective shell 1, the protective shell 1 can shield the radiation, and can protect the health of the security personnel when the radiation source 2 and the detector 3 are working. The present invention can directly put the product to be inspected into the weighing device 4 for inspection, and can realize the inspection of the product to be inspected without a conveyor belt, which can reduce the volume of the risk detection device 100, thereby reducing the footprint of the risk detection device 100. In addition, compared with the portable X-ray inspection equipment in the prior art, the risk detection device 100 of the present invention has a protective shell 1, so a relatively large protection distance is not required during the inspection, and the use scenario is flexible. In addition, the present invention can implement the risk detection method of electronic products through the control device 5, and the risk detection method can comprehensively judge the risk level of the product to be inspected by combining the weight information and the two-dimensional distribution image of the radiation attenuation plane, which expands the dimension of the risk level judgment of the product to be inspected, so that the risk level judgment of the product to be inspected is more accurate. In addition, the present invention can mine the overall similarity between the product to be inspected and the reference product through the peak signal-to-noise ratio, and can mine the local difference between the product to be inspected and the reference product through the subtraction value. The first image and the second image used to calculate the peak signal-to-noise ratio and the subtraction value do not require high-resolution, clearly identifiable radiographic images. Therefore, the present invention can accurately detect the risk level of the product to be inspected while requiring lower radiation energy and dose. Lower radiation energy and dose will reduce detection costs and reduce protection difficulty.

[0081] In some embodiments, the security personnel may include all persons near the risk detection device 100 during security inspection, including but not limited to operators of the risk detection device 100 and owners of electronic products, etc. The communication connection may include a signal connection and an electrical connection, and the electrical connection may include a wire connection.

[0082] In some examples, the radiation source 2 can use a high voltage of 30 kV, an average current of 0.5~1.0 mA, a beam angle of 60~90 degrees, the detector 3 can be 30-40 cm away from the radiation source target, the effective collection area of ​​the detector 3 can be 30 cm×30 cm, and the spatial resolution can be 200×200 μm.

[0083] In some examples, the weight measurement range of the weighing device 4 can be 1-5000g, and the accuracy can be 0.1g. Figure 6 As shown, the control device 5 may be disposed in the accommodating cavity 11 . In some examples, the control device 5 may be outside the protective shell 1 .

[0084] According to some embodiments of the present invention, Figure 6As shown, the weighing device 4 may include a weighing actuator 41 and a weighing processor 42. The weighing actuator 41 is arranged in the accommodating cavity 11, and one of the product to be inspected and the reference product is suitable for being placed on the weighing actuator 41, and the weighing actuator 41 generates a weight signal; the weighing processor 42 is in communication connection with the weighing actuator 41 and the control device 5, receives the weight signal, processes the weight signal, obtains the weight information, and sends the weight information to the control device 5. Therefore, the weighing actuator 41 and the weighing processor 42 can facilitate the weighing device 4 to weigh one of the product to be inspected and the reference product, obtain the weight information, and transmit the weight information to the control device 5.

[0085] According to some embodiments of the present invention, Figure 6 As shown, the weighing actuator 41 is arranged between the radiation source 2 and the detector 3, and one of the product to be inspected and the reference product is suitable for being placed on the weighing actuator 41, and is scanned by the radiation 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 radiation scanning on the one hand, and can weigh one of the product to be inspected and the reference product on the other hand. Since the weighing actuator 41 plays the role of a support, there is no need to set up a separate support, so that the overall volume of the risk detection device 100 is small, the floor space is small, and the manufacturing cost is low.

[0086] In some embodiments of the present invention, Figure 6 As shown, in the up and down direction, the radiation source 2 is arranged above the weighing actuator 41 , and the detector 3 is arranged below the weighing actuator 41 .

[0087] Alternatively, in the up-down direction, the radiation source 2 is disposed below the weighing actuator 41 , and the detector 3 is disposed above the weighing actuator 41 .

[0088] Both of the above-mentioned methods can facilitate the arrangement of the radiation source 2 , the weighing actuator 41 and the detector 3 , so that the weighing actuator 41 can be conveniently arranged between the radiation source 2 and the detector 3 .

[0089] In some embodiments of the present invention, in the left-right direction, the ray source 2 is disposed on the left side of the weighing actuator 41 , and the detector 3 is disposed on the right side of the weighing actuator 41 .

[0090] Alternatively, in the left-right direction, the radiation source 2 is disposed on the right side of the weighing actuator 41 , and the detector 3 is disposed on the left side of the weighing actuator 41 .

[0091] Both of the above-mentioned methods can facilitate the arrangement of the radiation source 2 , the weighing actuator 41 and the detector 3 , so that the weighing actuator 41 can be conveniently arranged between the radiation source 2 and the detector 3 .

[0092] In some embodiments of the present invention, a first fixing portion is provided on the weighing actuator 41, and the first fixing portion 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 radiation source 2 and the detector 3. It can be understood that since the shape of one of the product to be inspected and the reference product may not be convenient for placement, that is, it will fall or tilt after placement, so that the scanning surface of one of the product to be inspected and the reference product cannot be located between the radiation source 2 and the detector 3, the first fixing portion can facilitate the fixing of 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 radiation source 2 and the detector 3, so as to facilitate the completion of the detection.

[0093] In some embodiments of the present invention, in the front-to-back direction, the radiation source 2 is disposed in front of the weighing actuator 41 , and the detector 3 is disposed behind the weighing actuator 41 .

[0094] Alternatively, in the front-to-back direction, the radiation source 2 is disposed behind the weighing actuator 41 , and the detector 3 is disposed in front of the weighing actuator 41 .

[0095] Both of the above-mentioned methods can facilitate the arrangement of the radiation source 2 , the weighing actuator 41 and the detector 3 , so that the weighing actuator 41 can be conveniently arranged between the radiation source 2 and the detector 3 .

[0096] In some embodiments of the present invention, a second fixing portion is provided on the weighing actuator 41, and the second fixing portion 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 radiation source 2 and the detector 3. It can be understood that since the shape of one of the product to be inspected and the reference product may not be convenient for placement, that is, it will fall or tilt after placement, so that the scanning surface of one of the product to be inspected and the reference product cannot be located between the radiation source 2 and the detector 3, the second fixing portion can facilitate the fixing of 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 radiation source 2 and the detector 3, so as to facilitate the completion of the detection.

[0097] In some embodiments of the present invention, in the vertical direction, the radiation source 2 is arranged above one of the product to be inspected and the reference product, one of the product to be inspected and the reference product is arranged on the detector 3, the detector 3 and one of the product to be inspected and the reference product are arranged as a whole on the weighing actuator 41, and the weighing actuator 41 generates a weight signal. In some examples, a support may be provided on the detector 3, one of the product to be inspected and the reference product is arranged on the support, and the weighing actuator 41 weighs the detector 3, one of the product to be inspected and the reference product and the support as a whole, and then transmits the overall weight to the weighing processor 42, the weighing processor 42 may store the weight of the detector 3 and the support in advance, and the weighing processor 42 may 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. In this way, it is also easy to realize the arrangement of the radiation source 2, the weighing actuator 41 and the detector 3, so that the detection of one of the product to be inspected and the reference product can be realized.

[0098] According to some embodiments of the present invention, when the radiation source and the detector are arranged in the vertical direction, the weighing actuator is arranged between the radiation source and the detector, and the weighing processor is arranged in the accommodating cavity and is located on the side of the weighing actuator. In this way, the influence of the radiation on the weighing processor can be avoided, so that the processing result of the weighing processor is more accurate.

[0099] When the radiation source and the detector are arranged in the front-to-back direction or the left-to-right direction, the weighing actuator is arranged between the radiation source and the detector, and the weighing processor is arranged in the accommodating cavity and below the weighing actuator. Thus, without affecting the accuracy of the weighing processor, the weighing processor and the weighing actuator are more easily associated, and the weighing processor is conveniently arranged.

[0100] In some embodiments of the present invention, 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 being placed on the tray; the weight sensor is connected to the tray and generates a weight signal according to the load of the tray; the weight sensor is connected to the weighing processor 42 for communication and sends the weight signal to the weighing processor 42. Thus, it is convenient to realize that the weighing actuator 41 generates a weight signal, so that it is convenient for the weighing device 4 to weigh one of the product to be inspected and the reference product and obtain weight information.

[0101] In some examples, the tray may be a stainless steel material having a thickness of 0.1-0.3 mm.

[0102] In some examples, the weighing processor may include a signal amplifier, a digital-to-analog converter, and a data processor. The signal amplifier receives the weight signal, amplifies it, and then transmits it to the digital-to-analog converter. The digital-to-analog converter 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 can be grams, kilograms, or catties, etc.

[0103] According to some embodiments of the present invention, Figure 6 As shown, the accommodating cavity 11 has an open mouth, and the open mouth can be located on the side or top of the protective shell 1. It can be understood that the open mouth can facilitate the security inspector to place one of the product to be inspected and the reference product between the radiation source 2 and the detector 3, and also facilitate the security inspector to take out one of the product to be inspected and the reference product from the accommodating cavity 11. The open mouth can be opened at any position that is convenient for taking and placing one of the product to be inspected and the reference product, thereby improving the detection efficiency.

[0104] According to some embodiments of the present invention, Figure 6 As shown, a switch door 12 is provided at the opening to open and close the opening, and the switch door 12 may include a flat door, a side door, or a double door. The switch door 12 may be used to open and close the opening to facilitate the placement of the product to be inspected and the reference product. For example, the switch door 12 may be a radiation protection door. During radiation detection, the switch door 12 closes the opening to prevent radiation leakage. The setting form of the switch door may be selected according to the structure and placement space of the risk detection device itself, so as to facilitate opening and closing.

[0105] According to some embodiments of the present invention, the risk detection device may further include a first safety interlock, the first safety interlock includes a first locking part and a second locking part, the first locking part is arranged at the open mouth, the second locking part is arranged at the switch door, the first safety interlock is communicatively connected with the control device, and when the first locking part and the second locking part cooperate, the control device can control the radiation source to emit a beam. It is understandable that when the switch door is in an open state, the first locking part and the second locking part are not cooperated, and the control device cannot control the radiation source to emit a beam. When the switch door is in a closed state, and the first locking part and the second locking part cooperate, the control device can control the radiation source to emit a beam. In this way, it is possible to avoid the problem of radiation leakage caused by performing radiation detection before the open mouth of the switch door is closed. The switch door is made of a material with a radiation shielding effect.

[0106] According to some embodiments of the present invention, the structure of the drawer can be pushed and pulled at the open mouth to close and open the open mouth, the drawer includes a loading part and a blocking part, the loading part is connected to the blocking part, the loading part is located between the radiation source and the detector, one of the product to be inspected and the reference product is suitable for being placed in the loading part, and when the drawer is pushed into the open mouth, the blocking part blocks the open mouth. The blocking part is made of a material with radiation shielding effect. The opening and closing door of the drawer structure can make the risk detection device smaller in size and occupy a smaller area.

[0107] According to some embodiments of the present invention, the risk detection device may further include a second safety interlock, the second safety interlock includes a third locking part and a fourth locking part, the third locking part is arranged at the open mouth, the fourth locking part is arranged in the drawer, the second safety interlock is communicatively connected with the control device, and when the third locking part and the fourth locking part cooperate, the control device can control the radiation source to emit a beam. It is understandable that when the drawer is in a pulled-out state, the third locking part and the fourth locking part are not cooperated, and the control device cannot control the radiation source to emit a beam. When the drawer is in a pushed-in state, and the third locking part and the fourth locking part cooperate, the control device can control the radiation source to emit a beam. In this way, it is possible to avoid the problem of radiation leakage caused by performing radiation detection before the drawer is pushed into the open mouth.

[0108] According to some embodiments of the present invention, the risk detection device may further include a power supply device to supply power to components of the risk detection device that require electricity.

[0109] According to some embodiments of the present invention, the risk detection equipment may further include a control panel, which is communicatively connected to the control device, and on which the radiation source can be operated to emit and stop the beam. The control panel can display the final conclusion on whether the product to be inspected has been modified or whether there is a safety risk.

[0110] It will be appreciated by those skilled in the art that the features described in the various embodiments of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features described in the various embodiments of the present invention may be combined and / or combined in various ways. All of these combinations and / or combinations fall within the scope of the present invention.

[0111] Although the present invention has been shown and described with reference to specific exemplary embodiments of the present invention, it should be understood by those skilled in the art that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined by the embodiments of the present invention and their equivalents. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined not only by the above-described embodiments, but also by the equivalents of the above-described embodiments.

Claims

1. A risk detection method for electronic products, characterized in that: include: Obtain product weight information of the product to be inspected and reference weight information of the reference product; Determining weight difference information according to the product weight information and the reference weight information; Acquire a two-dimensional distribution image of the radiation attenuation of the product to be inspected as a first image; Acquire a two-dimensional distribution image of the ray attenuation plane of the reference product as a second image; Determine, based on the first image and the second image, a peak signal-to-noise ratio of a two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product, wherein the peak signal-to-noise ratio represents the overall similarity between the product to be inspected and the reference product; Determine, based on the first image and the second image, a subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product, wherein the subtraction value represents the local difference between the product to be inspected and the reference product; The risk level of the product to be inspected is determined according to 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, characterized in that: The step of determining the peak signal-to-noise ratio of the two-dimensional distribution images of the ray attenuation plane of the product to be inspected and the reference product according to the first image and the second image comprises: Obtaining a detector output value of each pixel among m×n pixels of the first image as a first output value, wherein m represents row m of the m×n pixels, n represents column n of the m×n pixels, and both m and n are integers greater than or equal to 1; Obtaining a detector output value of each pixel among m×n pixels of the second image as a second output value; The peak signal-to-noise ratio of the two-dimensional distribution images of the ray attenuation plane of the product to be inspected and the reference product is calculated according to the first output value and the second output value.

3. The risk detection method for electronic products according to claim 1, characterized in that: The step of determining the subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product according to the first image and the second image comprises: When the product to be inspected exists between the radiation source and the detector, an output value of the detector of each pixel point among x×y pixel points of the selected pixel area of ​​the product to be inspected is obtained as a third output value, wherein x represents a row x of x×y pixel points, y represents a column y of x×y pixel points, and x and y are both integers greater than or equal to 1; Obtaining an output value of a detector of each pixel point among x×y pixels of a selected pixel area of ​​the reference product as a fourth output value; When there is no product between the ray source and the detector, an output value of the detector of each pixel point among the x×y pixel points is obtained as a fifth output value; A subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product is calculated according to the third output value, the fourth output value and the fifth output value.

4. The risk detection method for electronic products according to any one of claims 1 to 3, characterized in that: The step of determining the risk level of the product to be inspected according to the weight difference information, the peak signal-to-noise ratio and the subtraction value comprises: comparing the weight difference information with a first set threshold; comparing the peak signal-to-noise ratio with a second set threshold; comparing the subtraction value with a third set threshold; When any one of the weight difference information, the peak signal-to-noise ratio and the subtraction value does not meet the corresponding set threshold, determining that the risk level of the product to be inspected is high risk; When the weight difference information, the peak signal-to-noise ratio and the subtraction value all meet corresponding set thresholds, it is determined that the risk level of the product to be inspected is low risk.

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

6. A risk detection device for electronic products, characterized in that: include: A protective shell for shielding radiation, the protective shell having a containing cavity; A radiation source, the radiation source being disposed in the accommodating cavity; A detector, the detector is arranged in the containing cavity, and one of the product to be inspected and the reference product is suitable for being placed between the radiation source and the detector to be scanned by the radiation source; A weighing device, which is disposed in the accommodating chamber and is used to weigh the product to be inspected to obtain product weight information, and is used to weigh the reference product to obtain reference weight information; A control device, the control device is communicatively connected with the radiation source, the detector and the weighing device, and is used for: Controlling the ray source to emit a beam; receiving a two-dimensional 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 distribution image of the ray attenuation of the reference product as the second image, or receiving the two-dimensional distribution image of the ray attenuation of the reference product output by the detector as the second image; receiving product weight information from the weighing device; Retrieving pre-stored reference weight information, or receiving reference weight information of the weighing device; Determining weight difference information according to the product weight information and the reference weight information; Determine, based on the first image and the second image, a peak signal-to-noise ratio of a two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product, wherein the peak signal-to-noise ratio represents the overall similarity between the product to be inspected and the reference product; Determine, based on the first image and the second image, a subtraction value of the two-dimensional distribution image of the ray attenuation plane of the product to be inspected and the reference product, wherein the subtraction value represents the local difference between the product to be inspected and the reference product; The risk level of the product to be inspected is determined according to 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, characterized in that: The weighing device comprises: A weighing actuator, the weighing actuator is arranged in the accommodating cavity, one of the product to be inspected and the reference product is suitable for being placed on the weighing actuator, and the weighing actuator generates a weight signal; A weighing processor is communicatively connected with the weighing actuator and the control device, receives the weight signal, processes the weight signal, obtains 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, characterized in that: The weighing actuator is arranged between the radiation source and the detector. One of the product to be inspected and the reference product is suitable for being placed on the weighing actuator and being scanned by the radiation source. The weighing actuator generates a weight signal.

9. The risk detection device for electronic products according to claim 8, characterized in that: In the up-down direction, the radiation source is arranged above the weighing actuator, and the detector is arranged below the weighing actuator; Alternatively, in the up-down direction, the radiation source is disposed below the weighing actuator, and the detector is disposed above the weighing actuator.

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

11. The risk detection device for electronic products according to claim 10, characterized in that: The weighing actuator is provided with a first fixing portion, which fixes one of the product to be inspected and the reference product so that a scanning plane of one of the product to be inspected and the reference product is parallel to between the radiation source and the detector.

12. The risk detection device for electronic products according to claim 8, characterized in that: In the front-to-back direction, the radiation source is arranged in front of the weighing actuator, and the detector is arranged behind the weighing actuator; Alternatively, in the front-to-back direction, the radiation source is disposed behind the weighing actuator, and the detector is disposed in front of the weighing actuator.

13. The risk detection device for electronic products according to claim 12, characterized in that: The weighing actuator is provided with a second fixing portion, which fixes one of the product to be inspected and the reference product so that a scanning plane of one of the product to be inspected and the reference product is parallel to between the radiation source and the detector.

14. The risk detection device for electronic products according to claim 7, characterized in that: In the up and down direction, the ray source is arranged above the detector, and the detector is arranged on the weighing actuator.

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

16. The risk detection device for electronic products according to any one of claims 7 to 15, characterized in that: The weighing actuator comprises: a tray, on which one of the product to be inspected and the reference product is suitable for being placed; A weight sensor is connected to the pallet to generate a weight signal according to the load of the pallet. The weight sensor is communicatively connected to the weighing processor to send the weight signal to the weighing processor.

17. The risk detection device for electronic products according to any one of claims 6 to 15, characterized in that: The accommodating cavity has an open opening, and the open opening is located on the side or top of the protective shell.

18. The risk detection device for electronic products according to claim 17, characterized in that: A switch door is provided at the opening 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, characterized in that: Also includes: The first safety interlock includes a first locking part and a second locking part, the first locking part is arranged at the open mouth, and the second locking part is arranged at the switch door. The first safety interlock is communicatively connected with the control device. When the first locking part and the second locking part cooperate, the control device can control the beam emission of the radiation source.

20. The risk detection device for electronic products according to claim 17, characterized in that: The structure of the drawer can be pushed and pulled at the open mouth to close and open the open mouth. The drawer includes a loading part and a blocking part. The loading part is connected to the blocking part. The loading part is located between the radiation source and the detector. One of the product to be inspected and the reference product is suitable for being placed in the loading part. When the drawer is pushed into the open mouth, the blocking part blocks the open mouth.

21. The risk detection device for electronic products according to claim 20, characterized in that: Also includes: The second safety interlock includes a third locking part and a fourth locking part, the third locking part is arranged at the open mouth, and the fourth locking part is arranged at the drawer. The second safety interlock is communicatively connected with the control device. When the third locking part and the fourth locking part cooperate, the control device can control the beam emission of the radiation source.

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