GB 15208.3-2018Micro-dose X-ray security inspection systems - Part 3: Transmission cargo security inspection systems (English PDF)

3.1 Conveyor load capacity

The maximum weight of the object to be inspected can be dragged by the device transport device.

3.2 Transmissive cargo safety inspection equipment

Used to inspect freight items, and the maximum one-sided length of the height and width dimensions of any one of the inspection passage entrance sections is greater than or equal to Transmission micro-dose X-ray safety inspection equipment of 0.91 m, less than or equal to 2.41 m.

5.1 Performance Specifications

5.1.1 Overview

For equipment with multiple transmission viewing angles, the performance index of any one of the viewing angles should meet the requirements of 5.1, and each test with each perspective The worst value of the result is used as the performance indicator of the device; for the device with multiple inspection channels, the performance index of any one of the inspection channels is It should meet the requirements of 5.1 and use the worst value of each test result of each inspection channel as the performance index of the equipment. Carry out 5.1.2~5.1.8 During the test, the parameters of the tube voltage, tube current, and total filtration of the X-ray generator should be kept constant.

5.1.2 Line resolution

Should be able to distinguish the minimum single solid copper wire diameter requirements, see Table 2.

5.1.3 Penetration resolution

Should be able to resolve the minimum single solid copper wire diameter under the 9.5mm, 15.9mm, 22.2mm and 27.1mm alloy aluminum steps Requirements, see Table 3.

5.1.4 Spatial resolution

Should be able to distinguish the minimum line diameter requirements, see Table 4.

5.1.5 Penetration

Should be able to distinguish the requirements of the thickness of the thinnest steel plate, see Table 5.

5.1.6 Organic matter discrimination

It should be able to distinguish polymethyl methacrylate steps with thicknesses ranging from 40mm to 160mm and impart orange color with different saturations.

5.1.7 Mixture resolution

It should be able to distinguish the aluminum step of the alloy with a thickness ranging from 1mm to 80mm and give green to different saturations.

5.1.8 Inorganic resolution

It should be able to distinguish steel steps with thicknesses ranging from 0.2mm to 24mm and impart blue with different saturations.

5.1.9 Conveying device

Meet the following requirements.

a) The conveying speed in the inspection state shall be greater than or equal to 0.1 m/s.

b) The conveyor belt should not run in the forward and reverse directions (only for equipment containing conveyor belts).

--- Within 10 minutes of continuous continuous operation, the lateral displacement is less than or equal to 5mm;

--- Within 30s of reverse operation, the lateral displacement is less than or equal to 10mm.

c) Should be able to load the corresponding weight, see Table 6.

5.2 Radiation and environmental safety indicators

5.2.1 Single dose check

Should comply with the provisions of 5.2.1 of GB 15208.1-2018.

5.2.2 Peripheral dose equivalent rate

Should comply with the provisions of 5.2.2 of GB 15208.1-2018.

5.2.3 Equipment noise

Should comply with the provisions of 5.2.3 of GB 15208.1-2018.

5.3 Operating environment

5.3.1 Working environment conditions

Should comply with the provisions of 5.3.1 of GB 15208.1-2018.

5.3.2 Power Adaptability

Should comply with the provisions of 5.3.2 of GB 15208.1-2018.

5.4 Security performance

Should comply with the provisions of 5.4 of GB 15208.1-2018.

5.5 Mechanical structure

Should comply with the provisions of 5.5 of GB 15208.1-2018.

5.6 Electromagnetic compatibility

Should comply with the provisions of 5.6 of GB 15208.1-2018.

5.7 Anti-shock

Should comply with the provisions of 5.7 of GB 15208.1-2018.

5.8 Anti-mechanical danger

Should comply with the provisions of 5.8 of GB 15208.1-2018.

5.9 Preventing the spread of flame

Should comply with the provisions of 5.9 of GB 15208.1-2018.

5.10 Temperature limits and heat resistance

Should comply with the provisions of 5.10 of GB 15208.1-2018.

5.11 Environmental adaptability

Should comply with the provisions of 5.11 of GB 15208.1-2018.

5.12 Functional requirements

Should comply with the provisions of 5.12 of GB 15208.1-2018.

6.1 Environmental requirements

Should comply with the provisions of 6.1 of GB 15208.1-2018.

6.2 Main instruments and tools for testing

Should comply with the provisions of 6.2 of GB 15208.1-2018.

Test body A and test body B. See Appendix A.

Scatter. See Appendix B.

6.3 Performance Indicator Test

6.3.1 Overview

The placement and orientation of the test body depends on the relative position of the X-ray generating device and the detector. Should be based on different performance For the requirements of the standard test, the test body is placed according to the specified position. The test body is placed as shown in Figure 1, where L and H are the width and height of the inspection channel, respectively. degree. When testing at 1, 2, and 3 points, the test body should be placed close to the surface of the conveyor, and at 1 o'clock, the test body should be as close as possible to the inspection channel.

On the side, the test body should be as close as possible to the right side of the inspection channel at 3 o'clock. At 5 o'clock, the test body should be as close as possible to the left and top of the inspection channel.

The test body at 6 o'clock should be as close as possible to the right and top of the inspection channel. The test body plane should be perpendicular to the ray emission direction for best testing Body image. In addition, image processing is allowed to achieve the best evaluation results. The test results should be recorded in the format of Appendix C. Description. H --- check the height of the channel; L --- Check the width of the channel.

6.3.2 Line resolution test

Place test body B in position 2 of the inspection area, start and complete the scan, and visually measure the X-ray of test card 1 in test body B on the display.

Image, test the ability of the device to separate the single solid copper wire in the background of the test body, and determine whether the result meets the requirements of 5.1.2.

Note: If you can see all of the wires, you can think that the device can distinguish the wires.

6.3.3 Penetration resolution test

Place test body B in position 2 of the inspection area, start and complete the scan, and visually measure the X-ray of test card 2 in test body B on the display.

The image, the device is tested for the ability to distinguish a single solid copper wire under the aluminum step of the alloy, and the result is in accordance with the requirements of 5.1.3.

Note: If you can see all the wires covered by the aluminum alloy step, you can think that the device can distinguish the wire.

6.3.4 Spatial resolution test

Place test body B in position 2 of the inspection area, start and complete the scan, and visually inspect the X-ray of test card 3 in test body B on the display.

Image, test the ability of the device to resolve the wire pair, and determine whether the result meets the requirements of 5.1.4.

Note: If all four horizontal and vertical wires are completely separated, the device can be considered to be able to resolve this pair.

6.3.5 Penetration test

Experiment with the following.

a) Place test object A in position 1~position 6 of the inspection area, start and complete the scan, and visually test the test body A on the display.

X-ray image, test the ability of the equipment to penetrate the steel plate, each position can be resolved by three-quarters of the round lead block The maximum thickness of the steel plate is the thickness of the steel plate that can be penetrated by the equipment, and the judgment result meets the requirements of 5.1.5;

Note: If you can see most of the three-quarters of the lead blocks that are blocked by the steel plate and can resolve the direction of the notch, the device can be considered to penetrate the steel plate.

b) Observe the warning information of the equipment in the area that is not penetrated, and judge whether the result meets the requirements of 5.4.1g in GB 15208.1-2018) Claim.

6.3.6 Organic matter discrimination test

Place test body B in position 2 of the inspection area, start and complete the scan, and visually test the X-ray of test card 4 in test body B on the display.

Line image, whether the judgment result meets the requirements of 5.1.6.

Note: If the adjacent steps of the polymethyl methacrylate step sample can be distinguished and can give different saturation orange, then the device can be considered Resolve.

6.3.7 Mixture resolution test

Place test body B in position 2 of the inspection area, start and complete the scan, visually test the X-ray of test card 5 in test body B on the display. Line image, whether the result meets the requirements of 5.1.7.

Note: If the adjacent steps of the aluminum alloy step sample can be distinguished and can be given a different saturation of green, the device can be considered to be distinguishable.

6.3.8 Inorganic resolution test

Place test body B in position 2 of the inspection area, start and complete the scan, and visually test the X-ray of test card 6 in test body B on the display.

Line image, whether the judgment result meets the requirements of 5.1.8.

Note: If the adjacent steps of the steel step sample can be distinguished and can be given a different shade of blue, the device can be considered to be distinguishable.

6.3.9 Conveyor test

Follow the steps below to experiment.

a) Under the minimum conveying speed of the conveying device in the inspection state, run at no load, test the unit time travel of the conveying device, calculate Conveying speed, whether the judgment result meets the requirements of 5.1.9a);

b) Continuously run forward for 10 minutes at the maximum conveying speed of the conveying device in the inspection state, and determine whether the result meets 5.1.9b) Requirements

c) Continuously reverse the operation for 30s under the maximum conveying speed of the conveying device in the inspection state, and judge whether the result meets 5.1.9b) Requirements

d) divide the total weight of the load used for testing into 4 equal parts at the maximum conveying speed at which the conveying device is inspected, making it heavy The amount is evenly distributed on the conveying device. When the above load is placed on the surface of the conveying device, the device can operate normally, and the result of the determination is Meet the requirements of 5.1.9c).

6.4 Radiation and environmental indicators test

6.4.1 Single dose test

Place the center of the radiation sensitive component of the dosimeter in a horizontal center position on the surface of the delivery device within the inspection channel. Test the equipment according to the test method specified in 6.3.1 of GB 15208.1-2018, and determine whether the result meets the requirements of 5.2.1.

6.4.2 Peripheral Equivalent Rate Test

When the conveyor is stationary, the scatterer with the same number of ray bundles (see Appendix B) is placed on the surface of the conveyor in the inspection channel.

At the horizontal center position, each scatterer is respectively illuminated by a beam of radiation, and the 400 x 400 plane of the scatterer is parallel to the beam exit direction.

Test the equipment according to the test method specified in 6.3.2 of GB 15208.1-2018, and determine whether the result meets the requirements of 5.2.2.

6.4.3 Equipment noise test

Test the equipment according to the test method specified in 6.3.3 of GB 15208.1-2018, and determine whether the result meets the requirements of 5.2.3. Claim.

6.5 Power supply range test

Test the equipment according to the test method specified in 6.4 of GB 15208.1-2018, and determine whether the result meets the requirements of 5.3.2. Claim.

6.6 Safety performance test

Test the equipment according to the test method specified in 6.5 of GB 15208.1-2018, and determine whether the result meets 5.4. Claim.

6.7 Mechanical structure test

Test the equipment according to the test method specified in 6.6 of GB 15208.1-2018, and determine whether the result meets 5.5. Claim.

6.8 Electromagnetic Compatibility Test

Test the equipment according to the test method specified in 6.7 of GB 15208.1-2018, and determine whether the result meets 5.6. Claim.

6.9 Anti-shock test

Test the equipment according to the test method specified in 6.8 of GB 15208.1-2018, and determine whether the result meets 5.7. Claim.

6.10 Anti-mechanical danger test

Test the equipment according to the test method specified in 6.9 of GB 15208.1-2018, and determine whether the result meets 5.8. Claim.

6.11 Prevention of flame spread test

Test the equipment according to the test method specified in 6.10 of GB 15208.1-2018, and determine whether the result meets the requirements of 5.9. Claim.

6.12 Temperature limits and heat resistance test

Test the equipment according to the test method specified in 6.11 of GB 15208.1-2018, and determine whether the result meets the requirements of 5.10. Claim.

6.13 Environmental Adaptability Test

Test the equipment according to the test method specified in 6.12 of GB 15208.1-2018, and determine whether the result meets the requirements of 5.11. Claim.

6.14 Functional Requirements Test

Follow the manufacturer's product instructions to determine if the results meet the requirements of 5.12.

7.1 Inspection classification

Should comply with the provisions of 7.1 of GB 15208.1-2018.

7.2 Type inspection

Should comply with the provisions of 7.2 of GB 15208.1-2018.

7.3 Factory inspection

Should comply with the provisions of 7.3 of GB 15208.1-2018.

7.4 Inspection items

The inspection items are shown in Table 7.

7.5 Evaluation of test images during type inspection

Should comply with the provisions of 7.5 of GB 15208.1-2018.

7.6 Inspection

Should comply with the provisions of 7.6 of GB 15208.1-2018.

7.7 Decision rules

Should comply with the provisions of 7.7 of GB 15208.1-2018.

A.1 Overview

The test body includes the test body A and the test body B. Test body A is a penetrating test body for testing the penetrating power of the device; test body B For comprehensive test body, for line resolution, penetration resolution, spatial resolution, organic matter resolution, mixture resolution and inorganic matter for test equipment Resolve.

The test body B contains a test card. The test card is mounted on the fixing plate in the test body B, and is packaged into a long length by the upper and lower protective lining plates.

Square test body. The protective liner of the test body B is a foamed polyethylene plate having a density of 0.015 g/cm³ to 0.025 g/cm³.

A.2 Test body A (penetration test body)

Test body A is a penetration test body for testing the penetration of the device.

The test body A is composed of test plates of different thicknesses superimposed with marking plates, which can be combined into a thickness of 18 mm to 88 mm. degree. The marking plate is a three-quarter lead with a thickness of 10 cm and a diameter of 50 mm adhered to the center of the surface of the steel plate with a thickness of 18 mm.

Block, see Figure A.1. The dimensions of the test steel plate are shown in Figure A.2. The material and thickness requirements are shown in Table A.1.

The direction of the lead block gap in the test body A can be adjusted, and the position shown is only one possibility.

A.3 Test Body B (Comprehensive Test Body)

A.3.1 Overview

Test body B includes 6 test cards. line resolution test card (TEST1), penetration resolution test card (TEST2), spatial resolution test card (TEST3), organic matter discrimination test card (TEST4), mixture resolution test card (TEST5) and inorganic resolution test card (TEST6) group to make. The structure and dimensions of the test body B are shown in Figures A.3 to A.10. […]