BS EN 462-1-1994 中英文版 无损检测-射线底片质 第1部分：像质计 图象质量评估

EN462-1.1994

（翻译：宋广泽 公供参考）

EN462 Non-destructive testing-Image quality of radiographs 无损检测 – 射线底片质量

Part: 1 Image quality indicators(wire type) Determination of image quality value 第一部分：像质计 图象质量评估

1.Scope 范围

This part of this European Standard specifies a device and a method for the determination of the image quality of radiographs. Other devices are the subject of parts 2 and 5 of the standard.

此欧洲标准的这一部分指定了对射线照相图相质量的评定方法和程序，其他程序见标准2至5部分。

2.Normative references 参考标准

This European Standard incorporates by dated or undated reference, provisions from other publications.These normative references are cited at the appropriate places in the text and the

publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.

本欧洲标准由注明日期或未注明日期的参考，其他出版物的条款合并编制而成。这些参考在文本适当位置引用，所用出版物在此后列出。对于注明日期的引用文件，其以后的修改或修订内容只有在本标准进行修订或修改时才引用。对于未注明日期的引用文件，将引用其最新版本。

EN462-2 Non-destructive testing-Image quality of radiographs-part 2: Image quality indicators (step/hole type),determination of image quality values1)

EN462-2无损探伤；射线照片的图像质量。第二部分：像质计（线型）；图像质量数值的测定 EN462-4 Non-destructive testing-Image quality of radiographs-part 4: Experimental evaluation of image quality values and image quality tables1)

EN462-4无损探伤；射线照片的图像质量。第四部分：图像质量数值和图像质量表的实验性评估

EN462-5 Non-destructive testing-Image quality of radiographs-part 5: Image quality indicators (Duplex wire type) – Determination of image unhappiness value1)

EN462-1.1994

EN462-5无损探伤；射线照片的图像质量。图像质量指数（双芯导线类型），整体图像不清晰度数值的测定

EN25580 Non-destructive testing – Industrial radiographic illuminators – Minimum requirements (ISO 5580:1985 )

EN25580 无损检测-工业射线照相-最低要求

EN45014 General criteria for suppliers, declaration of conformity EN45014 供应方的通用标准 3. Definitions 定义

For the purposes of this standard, the following definitions apply: 本标准采用以下定义： 3.1 Image quality 图相质量

That characteristic of a radiographic image which determines the degree of detail which it shows. 判断射线图相显示详细程度的特征。 3.2 Image quality indicator (IQI) 像质计

A device comprising a series of elements of graded dimensions which enable a measure of the image quality to be obtained. The elements of IQI are commonly wires or steps with holes.

一种包含一连串的元件和不同尺寸的能测量图像质量的设备，一般由金属线和孔洞组成。 3.2 Image quality value 图像质量值

A measure of the image quality required or achieved and is equal to the wire number given in table 1 for the thinnest wire which can be detected on the radiograph.

测量图像质量应达到相当于表1中给出的在射线照片中能发现的最小金属丝的编号。 4 Specification for wire type image quality indicators 线型像质计的规范 4.1 Dimension, designation 尺寸及名称

Figure 1 represents a wire-type image quality indicator. 图1描绘了一个线型像质计

EN462-1.1994

Dimensions in millimeter

单位：mm

a) Space for identification marking 各线之间距

Figure 1: Image quality indicator (wire type)

图1：线型像质计

The IQI system is based on a series of 19 wires of different diameters which are specified in table 1 together with the relevant tolerances and the wire numbers. This series of wires has been subdivided into four overlapping ranges of 7 consecutive wire numbers, viz. W1 to W7, W6 to W12, W10 to W16 and W13 to W19. The 7 wires in an IQI are arranged parallel to each other. The lengths of the wires, L are10mm, 25mm or 50mm.

像质计体系由一组19根不同直径的金属丝组成，表1规定了相关的公差和线号。这一系列像质计再细分为线号互相重叠的四组，每组有7根相邻线号的金属丝组成。即W1到W7，W6到W12，W10到W16 和W13到W19，一个像质计中的7根金属丝相互平行，其长度L为10mm，25mm和50mm。

The written designation of an image quality indicator shall give the symbol IQI, the number of the standard, the wire number of the thickest wire as specified in table 1 (e.g. W10), the symbol denoting the wire material (e.g. FE) and the length (e.g. W25):

像质计的书面名称应给出像质计符号，标准号，最大金属丝的线号（按表1规定如W10），金属丝的材料（如FE）和线的长度（如W25）。

EN462-1.1994

EXAMPLE 1: IQI EN 462 – W10 FE-25 例1：IQI EN 462-W10FE-25

The full designation may be abbreviated to the wire number of the thickest wire of the IQI (e.g. W10) and the wire material (e.g. FE) where reference to this standard is clear. 标准允许将全名缩写为最大金属丝线号及材料。 EXAMPLE 2: W10 FE 例2：W10 FE 4.2 Material 材料

All the wires of an IQI shall consist of the same material and shall be embedded in a protective covering of a material which shall not affect the image quality value. See table 2 for usual wire materials.

一个像质计的所有金属丝必须使用同一种材料，并埋入一种对像质值没有影响的材料内。常用的金属丝材料见表2。 4.3 Marking of IQI 像质计的标记

The marking applied on the IQI (see figure 1) shall give the following information: 用于像质计上的标记必须给出以下信息：

a) The number of the thickest wire (1, 6, 10or 13); this is located at the side of the thickest wire. 最大金属丝的编号（如1、6、10或13），放在最大金属丝的旁边。 b) The symbol identifying the wire material used, e. g. FE. 像质计材料的常用识别符号，如FE。 c) The EN symbol, example: 10 FE EN . 符号EN，如10 FE EN。

The radiographic image of the identification shall not cause glare when the film is viewed. It is recommended that the absorption of the marking is not more than twice the absorption of the thickest wire.

标记符号的图像应保证在观察射线底片时不会刺眼，推荐的符号的材料吸收应不大于最大金属丝吸收的两倍。

4.4 Declaration of conformity 合格证明

Each IQI shall be delivered with a declaration conformity according to EN 45014 or from an accredited laboratory which confirms that the specifications of this standard are fulfilled. For identification, the IQI shall be numbered and marked by the producer.

本标准使用的每个像质计均应依照EN45014有证明文件或来自于一个公认的实验室的说明书。为了辩认，像质计应由生产者编号并标记。

NOTE: Existing IQI’s which conform to the dimensions in 4.1 may be used until 1995. 备注：现有符合4.1规定尺寸的像质计可以使用至1995年。