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

Foreword

All technical content in this section is mandatory. GB 15208 "Micro Dose X-ray Safety Inspection Equipment" is divided into the following five parts.

--- Part 1. General technical requirements;

--- Part 2. Transmissive bag security inspection equipment;

--- Part 3. Transmissive cargo safety inspection equipment;

--- Part 4. Human body safety inspection equipment;

--- Part 5. Backscattering items safety inspection equipment. This part is the fourth part of GB 15208. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part is proposed and managed by the Ministry of Public Security of the People's Republic of China. This section drafted by: Ministry of Public Security First Institute, Beijing Zhongduan Anmin Analysis Technology Co., Ltd., Tongfang Weishi Technology Co., Ltd. Division, National Security and Alarm System Product Quality Supervision and Inspection Center (Beijing), National Security and Alarm System Product Quality Supervision and Inspection Xin (Shanghai), Shenzhen Institute of Metrology and Quality Inspection, Shenzhen Liming Qingqing Image Technology Co., Ltd. The main drafters of this section. Yang Xiaoyue, Chen Xueliang, Zhao Lei, Xing Yu, Zhao Nai, Lu Peng, Liu Caixia, Zhou Yingchun, Shi Zhibo, Deng Yanli, Tao Lei. Micro-dose X-ray safety inspection equipment Part 4. Human safety inspection equipment

1 Scope

Part 4 of China's mandatory series on micro-dose X-ray security inspection equipment, and the part where the object being scanned is a person. It specifies the classification, the general technical requirements, the test methods, the inspection rules, the packaging and marking, the storage and transport and the accompanying technical documentation of human body security inspection systems. It is applied together with the general requirements of Part 1. Everything about this part follows from the fact that a passenger, unlike a suitcase, receives the dose. The radiation requirements are therefore not a matter of protecting bystanders and operators but of limiting what is delivered to the person standing in the machine, and the standard sets the dose per scan, the way it is measured and the conditions under which the equipment may be operated at all, together with the interlocks and the indications that make it impossible to scan someone unintentionally or twice. Around that sit the imaging requirements, which have to be good enough to justify using ionising radiation on a person in the first place: the detection of the objects the machine is deployed to find, on the body and in clothing, the spatial resolution and contrast, and the behaviour with metallic and non-metallic targets. The rest is the equipment: the enclosure and the walk-through arrangement, the electrical safety, the environmental and electromagnetic requirements, the software, and the handling, storage and access control of the images - a question that on a human body scanner is not only technical, and which the standard addresses as part of the product rather than as a matter of local practice. Issued on 19 November 2018 and in force since 1 December 2019.

This part of GB 15208 specifies the classification, general technical requirements, test methods, inspection rules, packaging, and marking of human safety inspection equipment. Awareness, storage and transportation, and random technical documentation. This section applies to the design, manufacture, assembly, acceptance and use of various human safety inspection equipment. This section does not apply to X-ray safety inspection equipment for computed tomography (CT).

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 308.1-2013 Rolling ball - Part 1. Steel ball

GB 15208.1-2018 Micro-dose X-ray safety inspection equipment - Part 1. General technical requirements

GB 15208.2-2018 Micro-dose X-ray safety inspection equipment - Part 2

3 Terms and definitions

The following terms and definitions defined in GB 15208.1-2018 and GB 15208.2-2018 apply to this document.

3.1 Human body background material detection force materialdetectiononhumanbody 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 materialdetectioninair 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 wiredetectiononhumanbody 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 of the spatial resolutiononhumanbody 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 micro-doseX-rayhumanbodysecurityinspectionsystem 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 transmissionmicro-doseX-rayhumanbodysecurityin- Spectionsystem A transmissive micro-dose X-ray safety inspection device for inspecting humans carrying dangerous goods and contraband.

3.7 Backscatter X-ray backscatterX-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 backscattermicro-doseX-rayhumanbodysecurityin- Spectionsystem 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 unshieldedmicro-doseX-rayhumanbodysecurityinspec- Tionsystem An open micro-dose X-ray safety inspection device for inspecting humans carrying dangerous goods and contraband.

4 Equipment classification

4.1 Micro-dose X-ray human body safety inspection equipment (hereinafter referred to as equipment) is divided into. according to technical characteristics.

a) transmissive equipment;

b) backscattering equipment;

c) Transmissive, backscatter combined equipment.

4.2 Equipment is divided according to material resolution.

a) single energy spectrum equipment;

b) Multi-spectral spectrum equipment.

4.3 Equipment is classified according to the type of protection.

a) open equipment;

b) Closed equipment.

6 Test methods

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

6.2.4 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.

7 Inspection rules

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. Table

1 Inspection item list Serial number project technical requirements test method type inspection factory inspection

12 Equipment noise 5.2.3 6.4.3 - -

13 Power Adaptability 5.3.2 6.5 - - Table 1 (continued) Serial number project technical requirements test method type inspection factory inspection

20 Prevent flame spread 5.9 6.11 - -

21 Equipment temperature limit and heat resistance 5.10 6.12 - -

22 Environmental Adaptability 5.11 6.13 - -

23 Functional requirements 5.12 6.14 - -a a Only 5.12.1a),

5.12.5 in GB 15208.1-2018 are required.

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.

8 Packaging, marking, storage and transportation Should comply with the provisions of Chapter 8 of GB 15208.1-2018.

9 random technical documents

Should comply with the provisions of Chapter 9 of GB 15208.1-2018.

Appendix A

(informative appendix) Test evaluation record A.1 Human body conditions for examination The human condition environmental condition record table is shown in Table A.1. Table A.1 Human body examination environmental condition record Tester. Location. Date/Time. Equipment manufacturer. Equipment model. Equipment serial number. Ambient temperature/°C. Relative humidity. Atmospheric pressure/kPa. Model number. Test card number. Other test conditions. Checked object position The object to be inspected is at the reference location. The distance of the object to be inspected from the X-ray exit. The object being inspected is not in the reference position. Side position. Reference position left. Reference position to the right. height. Test other objects in the field and their distance and location. A.2 Image indicator test report The image indicator test report is shown in Table A.2. Table A.2 Image Indicator Test Report The image processing method used by the test item and the setting of the minimum index test result are passed (sqrt) Human body background material detection force/mm 5mm Air background material detection force/mm HDPE 3mm Stainless steel 1.6mm Body line resolution/mm 0.51mm Volume resolution/mm 6mm Software settings (software version, etc.). Hardware settings (such as tube voltage, tube current, scan speed, etc.). annex. Precautions.

Appendix B

(normative appendix) Test body 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°. Description. 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. Figure B.1 Test body composition 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. Comb test object tooth length 25mm, tooth width 25mm, tooth spacing 25mm, HDPE comb test object tooth thickness is 1.2mm, 2.0mm, 3.0mm, The tooth thicknesses of the

7.0 mm, stainless steel (SST-304) comb test articles were

0.8 mm,