TB/T 3396.3-2015Test methods for fastening systems of high-speed railway - Part 3: Determination of static stiffness for fastening assembly (English PDF)

3.2 Abbreviations

The following abbreviations apply to this Part of TY/T 1001.

3.2.1

LED. Light emitting diode

5.1 Installation location and number of display screens

5.1.1 Except for special circumstances, it is advisable that more than 95% of the audience with formal fixed seats in the venue meet the maximum viewing distance requirements.

5.1.2 Athletes, coaches, referees at the competition site (except for on-site scoring

referees in diving competitions) can all easily and clearly see the contents displayed on the screen.

5.2 Character display on a flat screen

5.2.1 Comprehensive gymnasium

5.2.1.1 The display screen used in a comprehensive gymnasium for scoring events

(gymnastics, martial arts routines, figure skating, etc.) can display at least 12 lines of

16-dot Chinese characters, with a line spacing of not less than 1/10 of the characters, and at least 27 Chinese characters per line.

5.2.1.2 The display screen used in a comprehensive gymnasium for ball games can display at least 8 lines of 16-dot Chinese characters, with a line spacing of not less than

1/10 of the characters, and at least 16 Chinese characters per line.

5.2.2 Track and field stadium

5.2.2.1 The display screen can display at least 13 lines of 16-dot Chinese characters, with a line spacing of no less than 1/10 of the character, and at least 26 Chinese characters displayed in each line.

5.2.2.2 Each character has a flashing function.

5.2.3 Swimming pool

5.2.3.1 The display screen can display at least 13 lines of 16-dot Chinese characters, with a line spacing of no less than 1/10 of the character, and at least 25 Chinese characters displayed in each line.

5.2.3.2 Each character has a flashing function.

5.2.4 Diving hall

The display screen can display at least 12 lines of 16-dot Chinese characters, with the line spacing not less than 1/10 of the character, and each line can display at least 13

When the background illumination is less than 20 lx, the contrast of the display screen shall be able to reach 100.1.

5.4.4 White field chromaticity coordinates

The white field chromaticity coordinates can be adjusted within the color temperature of 5000 K ~ 9500 K according to the use environment. According to the CIE 1931 colorimetric system, the tolerance is |deltax| <= 0.030, |deltay| <= 0.030.

5.4.5 Brightness uniformity

The non-uniformity of the display screen in the stadium shall be less than 10%.

5.5 Display control

5.5.1 The running time of the game can be displayed in real time.

5.5.2 The rolling display of game results can be displayed.

5.5.3 The game results can be displayed by turning pages.

5.5.4 The text content displayed can be switched automatically or manually.

5.5.5 For display screens with graphic and video display functions, text and images, animations, live broadcast images shall be able to switch automatically or manually.

5.6 Interface

5.6.1 Network interface

It shall have an IEEE 802.3 Ethernet network interface.

5.6.2 Data interface

It shall have the ability to equip multiple data interfaces including a standard RS-232 serial interface; be able to connect to the timing and scoring system at the game site to receive data.

5.6.3 Video interface

For display screens with graphic and video display functions, they shall have video interfaces that can receive video signals of various formats.

5.7 Electrical performance

5.7.1 Refresh frame frequency

The refresh frame frequency of LED video display screens shall be no less than 60 frames/s.

5.7.2 Refresh ratio

The refresh ratio of graphic display screens for stadiums shall be no less than 60 Hz;

the refresh ratio of full-color video display screens shall be no less than 240 Hz.

5.7.3 Ratio of out-of-control pixel

The loss of control rate of stadium display screens shall be no more than 3/10000; the loss of control rate of stadium display screens shall be no more than 2/1000, which shall be discretely distributed.

5.7.4 Grayscale level

For display screens used to display video images, each primary color shall have a grayscale processing capability of 256 levels (8-bit).

5.7.5 Video display resolution

To ensure the video display effect of the display screen, the minimum resolution of the display screen for video images is 320 (W) × 240 (H)

5.8 Appearance and structure

5.8.1 The appearance of the stadium display screen shall comply with the requirements of 5.3.2 in SJ/T 11141-2003.

5.8.2 The degree of protection of the outer shell of the stadium display screen shall comply with the requirements of 5.3.3 in SJ/T 11141-2003.

5.8.3 The relative deviation of the pixel center distance of the stadium display screen shall comply with the requirements of 5.3.4 in SJ/T 11141-2003.

5.8.4 The level up degree of the stadium display screen shall comply with the requirements of 5.3.5 in SJ/T 11141-2003.

5.9 Reliability

The reliability of the stadium display screen shall meet the requirements of 5.10 in SJ/T

11141-2003.

5.10 Safety

5.10.1 The safety requirements of the stadium display screen shall meet the requirements of 5.4 in SJ/T 11141-2003.

5.10.2 The display screen in the stadium shall be powered separately and shall meet the requirements of 5.8 in SJ/T 11141-2003.The construction acceptance of the cable line of the stadium display screen must meet the requirements of GB 50168 and GB 50171.

b) Display Chinese characters on the whole screen;

c) Display characters in the first column; display Chinese characters in other columns.

Inspect by visual inspection. The result shall meet the corresponding requirements in

5.2.1.

6.2.2 Track and field stadium, swimming pool, diving hall

a) Display characters on the whole screen;

b) Display Chinese characters on the whole screen;

c) Display characters in the first column; display Chinese characters in other columns.

d) The display screen displays the entire screen of characters; each character flashes one by one.

The results of visual inspection shall meet the corresponding requirements in 5.2.2 ~

5.2.4.

6.3 Maximum viewing distance and character height

6.3.1 The character height is calculated based on the pixel center distance of the display screen of the tested venue; the maximum viewing distance is calculated using formula (1) and meets the requirements of 5.3.1.

6.3.2 The character height of the display screen of the swimming pool, diving hall or swimming and diving hall is calculated based on the pixel center distance of the display screen. The result shall meet the requirements of 5.3.2.

6.4 Optical performance

6.4.1 Viewing angle

Choose any point on the display screen as the test point. Make the optical axis of the brightness meter coincide with the normal line of the display screen, that is, the angle between the two is zero. Measure the brightness at this time as the maximum brightness.

Then gradually change the angle between the optical axis of the brightness meter and the normal line of the screen. When the brightness is reduced to half of the maximum brightness, the angle at this time is regarded as the viewing angle. In actual testing, a module of the same quality as the screen can also be used to test in the laboratory according to the above method.

The viewing angle shall meet the requirements of 5.4.1.

The result shall meet the requirements of 5.5.2.

6.5.3 The display screen turns pages to display text. The result shall meet the requirements of 5.5.3 when tested by visual inspection.

6.5.4 The text content displayed can be switched automatically or manually. The result shall meet the requirements of 5.5.4 when tested by visual inspection.

6.5.5 For display screens with graphic and video display functions, text, images, animations, live broadcast images shall be able to switch automatically or manually.

The result shall meet the requirements of 5.5.5 when tested by visual inspection.

6.6 Interface

6.6.1 Network interface

Use a computer to connect to the display screen through Ethernet for data exchange.

The result shall meet the requirements of 5.6.1.

6.6.2 Data interface

Use a computer to connect to the display screen through the data interface for data exchange. The result shall meet the requirements of 5.6.2.

6.6.3 Video interface

Use a standard video signal generator to output signals to the display screen. The results shall meet the requirements of 5.6.3.

6.7 Electrical performance test

6.7.1 Refresh frame frequency

Use a general oscilloscope or frequency meter to measure. The results shall meet the requirements of 5.7.1.

6.7.2 Refresh ratio

Use a module of the same quality as the screen, to perform the test according to the method specified in 5.3.2 of SJ/T 11281-2003.The results shall meet the requirements of 5.7.2.

6.7.3 Ratio of out-of-control pixel

When displaying the white field and each primary color, observe the pixels that do not match the controlled luminous conditions. The ratio of the pixels to the total luminous pixels is the ratio out-of-control pixel. The ratio out-of-control pixel shall meet the requirements of 5.7.3.

6.7.4 Grayscale

The grayscale test is carried out according to the method specified in 5.3.5 of SJ/T

11281-2003.The result shall meet the requirements of 5.7.4.

6.7.5 Video display resolution

In the video control computer, a screen with a resolution of 320 (W) × 240 (H) is produced; the screen can be fully displayed on the display screen.

6.8 Appearance and structure

6.8.1 The appearance of the stadium display screen is inspected according to the method specified in 6.3.2 of SJ/T 11141-2003; the result shall meet the requirements of 5.8.1.

6.8.2 The degree of protection of the outer shell of the stadium display screen is inspected according to the method specified in GB 4208-1993; the result shall meet the requirements of 5.8.2.

6.8.3 The relative deviation of the center distance of the pixel of the stadium display screen shall be tested according to the method specified in 6.3.4 of SJ/T 11141-2003;

the result shall meet the requirements of 5.8.3.

6.8.4 The level up degree of the stadium display screen shall be tested according to the method specified in 6.3.5 of SJ/T 11141-2003; the result shall meet the requirements of

5.8.4.

6.9 Reliability

The reliability of the stadium display screen shall be tested according to the method specified in 6.10 of SJ/T 11141-2003; the result shall meet the requirements of 5.9.

6.10 Safety requirements

6.10.1 The safety requirements of the display screens in sports fields shall be tested according to the method specified in 6.4 of SJ/T 11141-2003; the results shall meet the requirements of 5.10.1.

6.10.2 The power supply requirements of the display screens in sports fields shall be tested according to the method specified in 6.8 of SJ/T 11141-2003; the electrical safety shall meet the requirements of 5.10.2.

6.10.3 For devices containing polymer materials in the display screens, the

manufacturer shall provide relevant certification materials to prove that they are flame- retardant materials.

6.10.4 Use on-site experiments to visually inspect the automatic alarm and automatic

screen shutdown functions of the display screens in sports fields.

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