GB 15208.4-2018Micro-dose X-ray security inspection systems - Part 4: Human body security inspection systems (English PDF)

3.1 Human body background material detection force

The ability of the device to resolve the thickness of high density polyethylene wafers in the context of high density polyethylene.

Note: Generally, it is expressed by the thickness (mm) of a high-density polyethylene wafer.

3.2 Air background material detection force

The ability of the device to resolve the thickness of the comb test object in the air background.

Note: Generally, the tooth thickness (mm) of the comb test object is expressed.

3.3 Body line resolution

The device resolves the ability of a single solid copper coil wire diameter in the context of high density polyethylene.

Note: Generally indicated by the nominal diameter (mm) of the wire.

3.4 Spatial resolution

The ability of the device to resolve the diameter of steel balls in the context of high density polyethylene.

Note: Generally, it is expressed by the diameter (mm) of the steel ball.

3.5 Micro-dose X-ray human body safety inspection equipment

A micro-dose X-ray safety inspection device for inspecting humans carrying dangerous goods or contraband.

3.6 Transmissive micro-dose X-ray human body safety inspection equipment

A transmissive micro-dose X-ray safety inspection device for inspecting humans carrying dangerous goods and contraband.

3.7 Backscatter X-ray

Scattered X-rays greater than 90° with respect to incident X-rays.

3.8 Backscatter micro-dose X-ray human body safety inspection equipment

A backscattering micro-dose X-ray human body safety inspection device for inspecting humans carrying dangerous goods and contraband.

3.9 Open micro-dose X-ray human body safety inspection equipment

An open micro-dose X-ray safety inspection device for inspecting humans carrying dangerous goods and contraband.

3.10 Closed micro-dose X-ray human body safety inspection equipment

A closed micro-dose X-ray safety inspection device for inspecting humans carrying dangerous goods or contraband.

3.11 General mode

A working mode for initial safety checks on certain groups of people.

3.12 Special mode

A mode of work used to perform security checks on specific populations.

3.13 Radiation workplace

The collective name of the control area and the supervision area.

3.14 Scan

The operation of obtaining an image by X-ray sweeping through the human body.

3.15 Check

The sum of all the scans required to display the results of imaging the various faces of the human body.

3.16 Reference location

The location where the test body is required to be placed when testing device image metrics.

3.17 Single check time

The time from when the operator issues an instruction until the image is displayed.

5.1 Performance Specifications

5.1.1 Human body background material detection force

It should be able to distinguish the thickness of the thinnest wafer by 5mm.

5.1.2 Air background material detection force

Should be able to distinguish the minimum high-density polyethylene sawtooth thickness of 3mm; should be able to distinguish the minimum stainless steel (SST-304) sawtooth thickness is 1.6mm.

5.1.3 Body line resolution

It should be able to distinguish the minimum single solid copper coil with a wire diameter of 0.511mm.

5.1.4 Volume resolution

It should be able to distinguish the smallest steel ball with a diameter of 6mm.

5.1.5 Organic matter resolution (for transmissive multi-energy spectrum equipment)

It should be able to distinguish the organic ladder with a thickness of 1mm~120mm and give orange with different saturation.

5.1.6 Mixture resolution (for transmissive multi-energy spectrum equipment)

It should be able to distinguish the aluminum step of the alloy with a thickness of 1mm~60mm and give green with different saturation.

5.1.7 Grayscale resolution (for transmissive single-energy spectrum equipment)

It should be able to distinguish the aluminum step of the alloy with a thickness of 1mm~60mm and a thickness difference of not less than 1mm.

5.1.8 Inorganic resolution (for transmissive multi-energy spectrum equipment)

It should be able to distinguish steel steps with a thickness of 0.2mm~14mm and give blue with different saturation.

5.1.9 Single inspection time

Should be less than 15s.

5.2 Radiation and environmental safety indicators

5.2.1 Dose of the subject

The surrounding dose equivalent H*(10) or personal dose equivalent Hp(10) of the position of the test subject caused by a general mode check shall be not more than 0.5µSv.

The surrounding dose equivalent H*(10) or individual dose equivalent Hp(10) of the position of the test object caused by a special inspection mode check shall be no more than 5µSv.

5.2.2 Radiation level of radiation workplace

When the equipment is in operation, a control zone should be placed around it, and the ambient dose equivalent of the control zone boundary should not exceed 20 µSv per hour.

When the equipment is in operation, a supervision area should be set around it, and the public and the personnel to be inspected are prohibited from entering the area. Accumulated hourly boundaries the surrounding dose equivalent should not exceed 2.5 µSv.

The position of the operator, the cumulative daily dose equivalent per hour should not exceed 0.5 µSv.

When the equipment is installed and commissioned, it should be tested at the workplace radiation dose level before being put into operation, according to different regions and locations.

The dose level requires that the control area, supervision area, and equipment operator position be drawn.

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

It shall comply with the provisions of 5.4 of GB 15208.1-2018 [except single-energy spectrum equipment 5.4.1g)].

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

5.12.1 Human-computer interaction function

Should comply with the provisions of 5.12.1 of GB 15208.1-2018.

5.12.2 Image display function

Should comply with the provisions of 5.12.2a) of GB 15208.1-2018.

5.12.3 Image Processing Function

Should comply with the provisions of 5.12.3 of GB 15208.1-2018.

5.12.4 Device Diagnostics

Should comply with the provisions of 5.12.5 of GB 15208.1-2018.

6.1 Environmental requirements

Should comply with the provisions of 6.1 of GB 15208.1-2018, and record the ambient temperature, relative humidity and atmospheric pressure (see Appendix A Table A.1).

6.2 Main instruments and tools for testing

Should comply with the provisions of 6.2.3 and 6.2.4 of GB 15208.1-2018.

Test body: see Appendix B.

Main instruments and tools for dose testing of the tested object: see C.1 in Appendix C.

Main instruments and tools for radiation level dose testing in radiation workplaces: see C.2.

Radiation level test scatterers for radiation workplaces: see C.3.

6.3 Performance Indicator Test

6.3.1 Overview

The equipment should scan the object to be inspected in a standard operating procedure and working mode. Hardware settings, software settings, and image processing methods during testing Parameters such as the dose of the subject to be tested should be recorded in the test documentation (see Table A.2).

When testing the device image index, the test body should be placed in the reference position, as shown in Figure 1. The reference position is in the center of the detection area and stands at a distance The height of the platform is 1 m, and the distance between the test body and the beam exit of the X-ray generating device can be reasonably selected within the detection area.

On the test body, the test card A face is facing the X-ray generating device, the B surface is close to the phantom (see Appendix B), and the X-ray passes through the test card and the body in turn. mold. Image processing is allowed to achieve the best evaluation results during device testing.

6.3.2 Human body background material detection test

The human body background material detection test card and the phantom are combined into a test body and placed at a reference position to start and complete the scan. Judging knot Whether it meets the requirements of 5.1.1.

6.3.3 Air background material detection force test

The air background material detection force test card and the phantom are combined into a test body and placed in a reference position to start and complete the scan. Judging knot Whether it meets the requirements of 5.1.2.

6.3.4 Body line resolution test

The body line resolution test card and the phantom are combined into a test body and placed in a reference position to start and complete the scan. Whether the result of the judgment is Meet the requirements of 5.1.3.

6.3.5 Volumetric spatial resolution test

Combine the body space resolution test card and the phantom into the test body and place it in the reference position to start and complete the scan. Whether the result of the judgment Meet the requirements of 5.1.4.

6.3.6 Organic matter discrimination test

Put the test body B in Appendix A of GB 15208.2-2018 in the reference position, start and complete the scan, and visually test the test body B on the display.

The X-ray image of the test card 5 and the test card 6 determines whether the result meets the requirements of 5.1.5.

Note: If the adjacent steps of the organic ladder sample can be distinguished and can give orange to different saturations, the device can be considered to be distinguishable.

6.3.7 Mixture/Grayscale Resolution Test

Place the test body B in Appendix A of GB 15208.2-2018 in the reference position, start and complete the scan, and visually test on the display.

The X-ray image of the test card 7 in the body B determines whether the result meets the requirements of 5.1.6 and 5.1.7.

Note: For transmissive single-energy spectroscopy equipment, equipment can be considered if the adjacent steps of the alloy aluminum step sample can be distinguished and can be given different gradations.

Can distinguish; for transmissive multi-energy spectrum equipment, if the adjacent steps of the alloy aluminum step sample can be distinguished and can give different saturation green, Then the device can be considered to be distinguishable.

6.3.8 Inorganic resolution test

Place the test body B in Appendix A of GB 15208.2-2018 in the reference position, start and complete the scan, and visually test on the display.

The X-ray image of the test card 8 in the body B determines whether the 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 Single inspection time test

When testing the test body, use the stopwatch to record the time from the operator's command to the completion of the test, and determine whether the result meets the requirements of 5.1.9. Claim.

6.4 Radiation and environmental indicators test

6.4.1 Dose test of the tested subject

Test the equipment according to the test method specified in D.2 of Appendix D, and determine whether the result meets the requirements of 5.2.1.

6.4.2 Radiation workplace radiation level test

Test the equipment according to the test method specified in E.2 of Appendix E, 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.

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.

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 the requirements of 5.4.

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 the requirements of 5.5.

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 the requirements of 5.6.

6.9 Anti-shock test

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

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 the requirements of 5.8.

6.11 Prevention of flame spread test

The equipment shall be tested according to the test method specified in 6.10 of GB 15208.1-2018, and the result is judged to meet the requirements of 5.9.

6.12 Equipment 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.

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.

6.14 Functional requirements

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 1.

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 Human body conditions for examination

The human condition environmental condition record table is shown in Table A.1.

A.2 Image indicator test report

The image indicator test report is shown in Table A.2.

B.1 Test body composition

The test body consists of a phantom and a test card, see Figure B.1. The combined size is 300mm × 300mm × 240mm (width × height × thick), used to simulate the human body to complete various tests.

The phantom consists of four high-density polyethylene (HDPE) plates measuring 300mm × 300mm (width x height), thickness 50mm, 55mm, 55mm and 55mm. The phantoms need to be combined, and the combined size is 300mm × 300mm × 215mm (width × height × thickness).

There are five test cards: Air background material detection force test card and two human body background material detection force test card by backboard and test object The composition, the body line resolution test card and the body space resolution test card are composed of a back plate, a test object and a cover plate. The surface of the test object on the test card is on the A side, the back side of the test object is the B side.

The phantom, test card backboard and test card cover material are HDPE with a density of 0.95g/cm³±0.05g/cm³.

The length of the test body is in millimeters (mm), the tolerance is ±0.3mm when the value is an integer or a decimal, and the tolerance is two decimal places. It is ±0.15mm; the angular tolerance is ±0.5°.

1---Air background material detection force test card, see Figure B.2 ~ Figure B.7, the number is 1;

2---human body background material detection test card 1, see Figure B.8, the number is 1;

3---Human background material detection force test card 2, see Figure B.9, the number is 1;

4---body line resolution test card, see Figure B.10 ~ Figure B.12, the number is 1;

5---body space resolution test card, see Figure B.13 ~ Figure B.16, the number is 1;

6--- phantom (thickness 50mm), see Figure B.17, the quantity is 1;

7--- phantom (thickness 55mm), see Figure B.18, the number is 3.

B.2 Air background material detection force test card

The test card consists of a backing plate and two comb-like test materials of different materials and thicknesses, see Figure B.2~B.7. […]