GA 926-2011General technical requirement for micro-dose X-ray transmission body scanners (English PDF)

4.1 Classification by detection principle

Classification by detection principle, the transmission of micro-dose X-ray security screening equipment can be divided into the body.

a) non-energy-resolved type;

b) energy resolution type.

4.2 Classification according to structure

According to the structure in the form of classification, transmitted micro-dose X-ray security screening equipment can be divided into the body.

a) unshielded;

b) shielded.

5.1 Performance Requirements

5.1.1 Contrast sensitivity

Contrast sensitivity of the device should be less than equal to 1.0%.

5.1.2 Line Resolution

Equipment should be able to distinguish between the nominal diameter of 0.127mm single solid core copper wire.

5.1.3 Spatial resolution

It should be able to distinguish between a diameter of 1.3mm wire pair.

5.1.4 Organics resolution (energy resolution type device)

Equipment should be able to distinguish a thickness of 1mm ~ 120mm poly methyl methacrylate, and give different saturation of orange.

5.1.5 The mixture was resolved (energy resolution type device) Equipment should be able to distinguish a thickness of 1mm ~ 60mm aluminum, and give different saturation green.

5.1.6 Inorganic resolution (energy resolution type device)

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

5.1.7 Single check time

Single inspection time should be less than 15s.

5.1.8 Detection height

Detect height should be not less than 2m.

5.2 Radiation and environmental safety requirements

5.2.1 Single dose inspection

Check the dose of a single device should be less than or equal to 4µGy.

5.2.2 Closed micro-dose X-ray transmission of human security inspection equipment leaks radiation dose rate in the outer surface of the device from anywhere 5cm (including equipment inlet, at the outlet), X-ray leakage dose rate should be less than 3µGy/h.

5.2.3 Non-enclosed micro-dose X-ray transmission body ray security inspection equipment protection requirements the use of such equipment, if an X-ray machine room, computer room on each side of the wall thickness of 1mm should be protective lead equivalent. No room should be delineated Radiation protection areas, radiation protection anywhere outside the boundary area should meet the dose of X-ray leakage rate of less than 2.5µGy/h.

5.2.4 Equipment noise

Away from the outer surface of the device anywhere, equipment noise should be less than or equal to 1m of 65dB (A).

5.3 Operating environment requirements

GB 15208.1-2005 shall comply with the requirements in 4.3.

5.4 Safety Requirements

Shall comply with GB 15208.1-2005 required (non-energy resolution-type devices 4.4.1g except) 4.4.

5.5 Mechanical structure

Shall comply with the requirements of 4.5 in GB 15208.1-2005.

5.6 Electromagnetic compatibility requirements

GB 15208.1-2005 shall comply with the requirements in 4.6.

5.7 Electrical Safety

Shall comply with the requirements of 4.7 in GB 15208.1-2005.

5.8 Environmental Adaptability

5.8.1 Overview

Micro-dose X-ray transmission of human security inspection equipment environmental adaptability should meet the following requirements.

a) the transmission of micro-dose X-ray inspection equipment for large-scale human security and electronic products, do not have the time to conduct environmental testing machine, allowing Xu of electrical components having individual functions 5.8.2 and 5.8.4 respectively, according to the requirements of environmental tests. Machine or its electrical parts Test specifications should meet the indicator device or component.

b) having individual functions, electrical components, 5.8.2 and 5.8.4 after suitability test environment, access to the whole of the whole machine 5.1.1 ~

5.1.6 Indicator test, its performance should be consistent with the requirements of 5.1.1 ~ 5.1.6.

c) After the climatic and mechanical environmental test equipment should not be corrosion and mechanical damage phenomenon.

d) After the completion of the test environment Damp heat, insulation resistance test immediately. The test method according to GB 15208.1-2005 5.9.2, the test results shall comply with the requirements of 4.7.2 in GB 15208.1-2005.

5.8.2 Climate requirements

Climate requirements are shown in Table 1 (low-temperature storage test does not include a liquid crystal display).

Table 1 Climate requirements

Pilot projects severity Test Method Machine electrical components having individual functions duration/Check item duration/Check item Low temperature (0 ± 3) °C According to GB/T 2423.1 Test A feed OK, about the project when the power test High temperature (45 ± 2) °C According to GB/T 2423.2 Test B feed OK, the whole process is energized Constant heat (40 ± 2) °C (93 ± 3)% RH (Non-condensing) According to GB/T 2423.3 Test Cab Conducted testing energized about the project Before the experiment the initial measurement and the end of each test Before the test, should be

5.1.1 Test ~

5.1.6

Before the experiment the initial measurement and the end of each test Check before items and methods by the product standard regulation Low temperature storage (-40 ± 3) °C According to GB/T 2423.1 Test A feed OK, not energized during the test After the test at least restore 4h After testing, should be seized Test 5.1.1 ~ 5.1.6 End test After at least recover 4h after detection, Checking items and the method of the product standard regulation

5.8.3 Environmental Requirements machine mechanics

The whole mechanical environment requirements shown in Table 2.

Table 2 machine mechanics environmental requirements

Pilot projects severities check items Transportation test (Analog or transport) Test mileage.200km;

Highway level. three road or simulated transport;

Traveling speed. 20km/h ~ 40km/h Initial measurements and testing After the test before the start of the test, should be checked 5.1.1 ~ 5.1.6 Environmental Requirements 5.8.4 Mechanical Parts Electrical components mechanical environment independent functional requirements are shown in Table 3.

Table 3 Mechanical environment requirements for components

Pilot projects severities Having individual functions, electrical components Test methods for checking items Vibration test Fc Frequency Range/Hz. 10 ~ 55 ~ 10 (n Sine wave);

Amplitude /mm.0.15;

Vibration direction. X, Y, Z;

Duration/min. 10

GB/T 2423.10

Impact test Ea

Peak acceleration/(m/s2). 150;

Duration/ms. 11;

Shock direction. Z direction;

Impact. 18 times

GB/T 2423.5

Inspection items and methods by the product standard regulation

6.1 Environmental conditions

Unless otherwise specified, all the tests were normal environmental conditions atmospheric conditions.

Ambient temperature. 15 °C ~ 35 °C.

Relative Humidity. 45% to 75%.

Atmospheric pressure. 86kPa ~ 106kPa.

6.2 The main test equipment and instruments Ionization dosimeter. minimum range of not more than 10µGy, dosimeters to go through national testing department test.

High sensitivity dosimeter. minimum range of not more than 0.1µGy/h, dosimeters to go through national testing department test.

Sound Level Meter. Frequency range 25Hz ~ 8kHz.

Stopwatch.

Test Body. See GB/T 15208.2-2006.

Leakage radiation dose rate testing diffuser. See Appendix A.

6.3 Detection mechanical structure

Detecting mechanical structure according to GB 15208.1-2005 5.3 execution.

6.4 Performance Requirements Test

6.4.1 Contrast sensitivity test

Test methods in accordance with Appendix B to perform, it is determined whether the results meet the requirements of 5.1.1.

6.4.2 Resolution test line

The GB/T 15208.2-2006 the test body A is placed in the middle of the detection area, the test body perpendicular to the plane of the square-ray to the normal operation of equipment, visual display on the test card A test body X-ray images 1, it is determined at the test device to distinguish a single body background Solid copper ability to meet the requirements of 5.1.2.

6.4.3 Spatial resolution test

The GB/T 15208.2-2006 the test body A is placed in the middle of the detection area, the test body perpendicular to the plane of the square-ray to the normal operation of equipment, visual display on the test card A test body X-ray image 3 decision device resolution is the ability of the metal wire Whether it meets the requirements of 5.1.3.

6.4.4 Organic matter resolved detector

The GB/T 15208.2-2006 the test body B is placed in the middle of the detection area, the test body perpendicular to the plane of the square-ray to the normal operation of equipment, visual display B on the test specimen in the test card X-ray image 6, it is determined whether the results meet the requirements of 5.1.4.

If the sample can be distinguished from neighboring organic matter, and can give different color saturation of an orange, you can assume that the device can distinguish.

6.4.5 The mixture was resolved detector the GB/T 15208.2-2006 the test body B is placed in the middle of the detection area, the test body perpendicular to the plane of the square-ray to the normal operation of equipment, visual display B on the test specimen in the test card 7 X-ray image, it is determined whether the results meet the requirements of 5.1.5.

If the aluminum ladder can be distinguished from samples adjacent ladder, and can give different color saturation of green, you can assume that the device can distinguish.

6.4.6 Inorganic resolved detector

The GB/T 15208.2-2006 the test body B is placed in the middle of the detection area, the test body perpendicular to the plane of the square-ray to the normal operation of equipment, visual display on the test body B X-ray image of the test card 8, it is determined whether the result 5.1.6 Claim.

If the steel ladder can be distinguished from samples adjacent ladder, and can give different color saturation of the blue, you can assume that the device can distinguish.

6.4.7 Single inspection time detecting

Use the stopwatch to detect moving parts start moving to the image display completion time, it is determined whether the results meet the requirements of 5.1.7.

6.4.8 Detection height detection

Height device channels should be greater than or equal 2m. It was placed at the bottom and top of the channel two 10mm height of less than or equal Plexiglass block, open X-ray scan of the channel, it is determined whether the X-ray image shows two completely organic glass bottom and top Glass blocks.

6.5 Radiation and Environmental Indicators test

6.5.1 Single dose of the test inspection

The ionization dosimeter is set to dose profile, zero, and then placed in an intermediate position detection area, continuous operation 10 times, the cumulative number of demand from the average value was determined to check a single dose meets the requirements of 5.2.1.

6.5.2 Test Closed micro-dose X-ray transmission of human security inspection equipment leaks radiation dose rate Leak detection channel placed in the radiation dose rate testing scatterers (see Appendix A), X-ray emitting device, leaving the cabinet at 5cm at any point, with high sensitivity dosimeter measuring radiation dose rate of leakage, it is determined whether the results meet the requirements of 5.2.2.

6.5.3 Test transmission of non-enclosed micro-dose X-ray security inspection equipment body radiation protection requirements If such equipment is installed in the X-ray machine room, computer room on each side of the wall thickness of 1mm should be protective lead equivalent. The use of such provided If there is no equipment room should be delineated area of radiation protection, radiation protection zone boundary is determined at any of the X-ray dose rate of leakage Meets 5.2.3 Requirements.

6.5.4 Test equipment noise

The moving part is running at full capacity, leaving any device 1m at the point, with a sound level meter measurement noise, it is determined whether the result Requirements 5.2.4.

6.6 Security Functional Test

6.6.1 Interlock Test

Any interlock cut-emitting region, it is determined whether the X-ray emission can be stopped immediately, and the X-ray emission light is off.

6.6.2 Emergency stop test

Pressing any of the emergency stop switch, the device determines whether the X-ray generator power supply system and moving parts can be cut immediately.

6.7 Scope of supply test

According to the test method specified in 5.7 of GB 15208.1-2005 be determined whether the results meet the requirements of 5.1.1 ~ 5.1.6.

6.8 Environmental Adaptability Test

Table 1 to Table 3 requirements and GB/T 2423.1, GB/T 2423.2, GB/T 2423.3, GB/T 2423.5 and GB/T 2423.10 regulations

Given test method.

6.9 Electrical safety requirements, test

According to the test method specified in 5.9 GB 15208.1-2005 performed.

6.10 Electromagnetic compatibility test

According to the test methods specified in 5.10 of GB 15208.1-2005 performed.

6.11 Mechanical environmental testing machine

According to GB 15208.1-2005 Test methods were 5.11 predetermined performance indicators to determine whether a device is 5.1.1 ~ 5.1.6 as well as the requirements of 5.2.

7.1 Evaluation Principles

Evaluation of the test images using subjective evaluation method.

7.2 Evaluation Record

The evaluation team members will evaluate the results of the test fills the test image evaluation image recording sheet, the image evaluation test record table see attached Record C.

7.3 Evaluation Conclusion

Evaluation records of the members of the evaluation team statistics, test image is formed on the final performance evaluation results.

9.1 Overview

Equipment should be accompanied by at least include the use of the specification and the user can query for the address, including the file. Instructions and user interface should it is written in Chinese. Random technical documentation is considered part of the equipment.

Warning instructions and warning symbols (marked on the device) explanations shall be given in a random technical documents.

9.2 User's Guide

Instructions should be provided all the information to make their technical equipment for operation. It includes the following.

a) The method of installation and removal equipment;

b) the basic principles and operating instructions;

c) connecting cable between the device components;

d) supply voltage range, supply frequency range, power consumption machine;

e) working environment and storage conditions of temperature and humidity range;

f) equipment dimensions, weight;

g) identify and use the operating control means;

h) description and display alarm information;

i) maintenance, inspection, maintenance and cleaning.

Appendix A

(Normative)

Leakage radiation dose rate testing scatterers when the leakage radiation dose rate testing micro-dose X-ray transmission of human security inspection equipment needs to be placed within a detection channel Diffuser to simulate the human subject is scattered situation. Scattering body is molded into the water, the water no more than 2mm from the mold wall thickness polyethylene cylinder injection Water composition, volume should at least meet the requirements of Table A.1.

Table A.1 scatterer volume requirements

Scatterers

Long/mm Diameter/mm

Appendix B

(Normative)

Contrast sensitivity test body and test methods B.1 contrast sensitivity test body Contrast sensitivity test body made of a transparent plexiglass, divided into two parts, body and absorb plexiglass contrast body. Organic glass Glass absorbent body made of plexiglass different thickness of the composition, contrast plexiglass body in three sizes, specific requirements in Table B.1.

Table B.1 requested contrast sensitivity test body

No. Name Specification (length × width × thickness) Number A plexiglass absorbent body 1 300mm × 300mm × 40mm 3 2 plexiglass absorbent body 2 300mm × 300mm × 30mm 2

3 PMMA absorbent body 3 300mm × 300mm × 10mm 2

4 Comparative plexiglass body 1 60mm × 60mm × 2.0mm 1

5 Comparative plexiglass body 2 60mm × 60mm × 1.5mm 1

6 Comparative plexiglass body 3 60mm × 60mm × 1.0mm 1 the maximum thickness of the absorber superimposed 200mm, surrounded by bolting into one, with double-sided adhesive tape according to Comparative body position shown affixed to suck Income outermost body. Absorbent body and contrasting body fixed inside the stent, contrast sensitivity testing body. Contrast sensitivity test structure

Figure B.1.

B.2 Test Method

Contrast sensitivity test methods are.

a) as shown in Figure B.1, select a thickness of 200mm plexiglass absorber and the corresponding comparative body. Plexiglass Distance between the body and a plexiglass edge contrast and contrast plexiglass body absorbing boundary shall be greater than or equal to 40mm.

b) the contrast sensitivity test body is placed in the middle of the detection zone, and plexiglass direction in the plane perpendicular to the rays.

c) scanning at rated speed, measured enables inspection system shows the minimum after plexiglass absorber contrast member Thickness, according to the data obtained and the following formula to calculate the corresponding value of contrast sensitivity.

Contrast sensitivity = Compare plexiglass thickness Plexiglass absorber thickness × 100% Millimeters 1 --- 10mm plexiglass absorbent body (2);

2 --- 30mm plexiglass absorbent body (2);

3 --- 40mm plexiglass absorber (3);

4 --- Comparative plexiglass body 1 (60mm × 60mm × 2.0mm);

5 --- Comparative plexiglass body 2 (60mm × 60mm × 1.5mm);

6 --- Comparative plexiglass body 3 (60mm × 60mm × 1.0mm).

Figure B.1 contrast sensitivity test body

Appendix C

(Informative)

Image evaluation test record form Evaluation of the test image recording shown in table C.1.

Table C.1 image evaluation test record form

Date Time Tester

Equipment manufacturers Model Serial Number Display Manufacturers Model Serial Number X-ray source high value of the X-ray beam source value no. Test Project test results the best selection of image processing functions 1 contrast sensitivity 2 line resolution (TEST1) 3 spatial resolution (TEST3) Level.

vertical.

4 thin organic resolution (TEST5) 5 organics resolution (TEST6) 6 mixture resolution (TEST7) 7 inorganic resolution (TEST8)

Note 1. Eligible project with "-" mark.

Note 2. allows the use of enhanced amplification, reverse, high penetrating power and other image processing tools to achieve the best evaluation results.

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