识别卡.记录技术.第8部分:磁条.51.7kA/m(650Oe)矫顽磁性

[中文适用范围]： ISO/IEC 7811 定义了 ISO/IEC 7811 本部分第 4 条中定义的身份证的特征，以及此类卡在国际交换中的使用。 ISO/IEC 7811 的本部分规定了身份证上 51.7 kA/m (650 Oe) 磁条（包括任何保护覆盖层）的要求。 编码技术和编码字符集没有定义，但是可以使用ISO/IEC 7811-2的规范。 它考虑了人和机器方面并规定了最低要求。 矫顽力影响 ISO/IEC 7811 本部分中指定的许多量。 其标称值为 51.7 kA/m (650 Oe)，但其本身并未指定。 将卡暴露在磁场中可能会破坏记录的数据。 ISO/IEC 7811 提供了卡的执行标准。 ISO/IEC 7811 中没有考虑卡在测试前所经历的使用量（如果有）。 不符合规定标准的，有关各方应进行协商。 ISO/IEC 10373-2 规定了用于根据 ISO/IEC 7811 本部分中规定的参数检查卡的测试程序。 注：ISO/IEC 7811 本部分中的 SI 和/或英制测量系统中的数值可能已被四舍五入后，因此彼此一致，但不完全相等。 可以使用任一系统，但两者不应混合或重新转换。 最初的设计是使用英制测量系统进行的。 [外文原描述]： ISO/IEC 7811-8:2008 is one of a series of International Standards defining the characteristics of identification cards. It provides criteria to which cards shall perform and specifies the requirements for such cards used for international interchange. It takes into consideration both human and machine aspects and states minimum requirements. ISO/IEC 7811-8:2008 specifies requirements for a 51,7 kA/m (650 Oe) magnetic stripe (including any protective overlay) on an identification card. This magnetic stripe is between ISO/IEC 7811-2 (23,9 kA/m, 300 Oe) and ISO/IEC 7811-6 (minimum 199 kA/m, 2500 Oe) in terms of coercivity and is primarily used for hotel guest room entry systems worldwide. ISO/IEC 7811-8:2007 specifies the "window" to be used to establish given values for 51,7 kA/m (650 Oe) media, the main difference being in the Imin (6,5 FR) and Imax (8 FR) values which define the extremities of the window. Encoding techniques, specification, error detection, and track locations are not specified in ISO/IEC 7811-8:2007. ISO/IEC 7811-8:2008 specifies the conditions for conformance,physical characteristics for the card (warpage and surface distortions) and the magnetic stripe area (location, height and surface profile, roughness, adhesion, wear, and resistance to chemicals),the signal amplitude performance characteristics of the magnetic stripe. The encoding specification, angle of recording, bit density, flux transition spacing variation, signal amplitude, data structure including track format, use of error correction techniques, and the location of encoded tracks are not specified, but are recommended to be the same as ISO/IEC 7811-2 where appropriate. ISO/IEC 7811-8:2008, together with a standard for test methods, provides for interchange between various types of identification card processing devices and systems.