GB/T 13265.1-1997 纤维光学隔离器 第1部分：总规范

ICS31.260

L51着鹭

中华人民共和国国家标准

Gs/T13265.1一1997

idtIEC1202-1:1994

QC830000

纤维光学隔离器

第1合肠分:总规范

Fibreopticisolators-

Part1:Genericspecification

1997一10一05发布1998一09一01实施

国家技术监督局发布

GB/T13265.1一1997

目次

前言”······”············“··““····”·”····”····价·““·“····“·“·····”“··””··””·”····”··”·“·····“一v

IEC前言”····“·······“··········””······”·”····“·“·“·····”“····“·”··””··”···”········“·“······“二m

引言········“·······“····”·····””·”····“·“····“·“·”····“·”····”·”··””··················“····”·”·…姐

1总则”····”二，.····““····“·”····”一·‘…”.····““·“····”······”·····””·”····..····“·····““····”一1

1.1范围1

1.2引用标准”·”·”····““····“·”····”·”···“·“·······“·”····”·······”····”·····”·········“····”·”·…1

1.3定义“·”··””··“”····“·······“····“·”·”·”·”·····“·····““·······”·”····”··············““··””·…2

2要求“····”·”·····“·“·“·“····”····”·”·“·“····“·“·“··””·”·”···········“·“··“”····”······……3

2.1分类····““··””··”···““····“·”·”·····””······“·“·“·“·······”·”·”······“·····““··““····”·…3

2.1.1类型“·“··“”·”·”··““····“····“····”·”····”·”···“·“·····““·”·”····”·”······“·“····”··””·4

2.1.2品种“····“····”····”·“····“····“····”·”··””····“·“····“·“··“·”·””·”··“······“·“·”·”··””·4

2.1.3规格“····”····”····“·······“····”····”····“·“·····“······”·”···”·”·”······“·“·“·”·”·”·”一5

2.1.4气候类别”····”····”·······“····“····”···········“·····““····”·”·”·”···“·“·“·“·“·“····”·…5

2.1.5评定水平”····”····“·“····”····”···············““····“·“····”·”·”······“·“·“·“·“·”····”·…5

2.2文件·······“····”····”·····““····“····”····”·······“····“····“·····””····”·”·····““·“·“·“·……6

2.2.1符号······“····”····”······“····“·····”···”·”···············“····”·”····”·“·······“·“·”·”·”一6

2.2.2规范体系”····“····“·······”····”·······“·“·…·，’’···“”····”····““·····“”·······”····“·“·“…·6

2.2.3图············································································································……7

2.2.4测量“··””····..·.··“·······”····”·…“..···“····”“····”····”·····“···········”·”·..··““····“·…7

2.2.5试验资料单.·“一7

2.2.6使用说明”····”···“·······“····”····”··········““····“·····””···········““·”·······”····“··““·8

2.3设计和结构·····“····“·······”·········“····“·······”····”·······“·“·“·”·····”····“·“·”·”·”一8

2.3.1材料“一:···””···················”··········“·······“·······”········“··“·”····”····”··““·“··一·8

2.3.2加工质量······“····“·····”······“·····“····“·········”·······“········””··””····“··““··””··””·8

2.4质量······“····”··········““·····””·····”·····“·······“·”····”·”····“·”·”·“·”·”·”········“一8

2.5性能要求····”····”······“·“····”·”····”·····““·“····“·”··””··“”·“··““·”·····””·”·”···……8

2.6识别和标志“····“·····””·”····“·“····”·····””·”···”····”·“·“·”····”··””·········“·“·“·”一8

2.6.1规格识别号···”·“··”“·“····”·”··“”·“··““·“，“·”·”·”··””····“·····““····”·····””···……8

2.6.2器件标志·“·····”·”····“·“··”“····“····””····“····“····”·”·”·”···，”·····““·“·····”···”一8

2.6.3包装标志”··””···“·······”····”······“·“·······“····”····”············““····“·”·”····”··“…9

3质量评定程序”··““····“·······”····“····“····“·”····”····”···”·····““·············”··”·““····“·…9

3.1初始制造阶段·””····“·······”····”·····“··“·”····“·········”·”···················”·”·”·”···”一9

3.2结构类似性“····“····”·······”····“·····““··““····“····”··”···”··”·····“·“·“····”·”·”·”···一9

3.3鉴定批准程序···”····“·······“·····”····”···”·”·············“················””··”·······“····“一9

3.4质量一致性检验···”·······“·”··””····”····”·············“·“··“·········”·”·”·，···“一”‘“··一·10

3.5放行批证明记录···“·“··””·”··””····“····“·“····“········””·”··”·····“··”“··”“····”····”·…’n

GB/T13265.1一1997

3.6延期交货·········································································”····”·····”······”····……11

3.7完成B组检验前交货的放行···············”·············“·”····”····”·”····”·········..·..·..·.……11

3.8替代的试验方法·········“···················“········“····”··············”····”····”··············“…n

3.9不检验的参数”·········”····························································”····“····“····”··一12

4测量和环境试验程序···············································“····”·············”...·..·.·..·..·.··…·…12

4.1概述···················································“·······“·····““·12

4.2标准条件································.，·····”·················································“·······一·13

4.3样品······“·····”····”···············································································“·“··一·13

4.4物理性能检验·”···········································“············“····“·····“······”·”··一·13

4.4.1外观检验········“··············”····“·······”·························”···············“··“··““·13

4.4.2尺寸和重量········...····”······”·····”······“······”··””·····”············”···················一·14

4.4.3产品检验····················“····“·····”······”············”·····”··························“····“一14

4.5光学试验和测量程序·········“····.，···························”····”···········””····”·”··”·······“一15

4.5.1目的·····························································································“··········……15

4.5.2概述······”····“·······················································“·················”·····“”····”一15

4.5.3插入损耗·····”··········“·····.，············”·”·······”····································“·…17

4.5.4反向损耗”·····”·····················································“·····““····”····”····”·”··””·…22

4.5.5对环境光祸合的敏感性···“································“····“·”····“····“······”·”·..·..·……23

4.5.6回波损耗·”···”····，····”·”···································”······················“·····”····””一24

4.5.7频谱损耗······”····””··········“·····“······“·“····“····“·······“····“····”····”····”·”····”一27

4.5.8对外界磁场的敏感性.·29

4.5.9传输变化·············“···“·····“······“·······“·”····”·······”····”·····”···”····················一·30

4.5.10温度依赖性····”······”··············”·········································“····“·····““·“·……32

4.5.11偏振依赖性·····················································”····”··········””··””····”·”·”.…33

4.5.12最大输入功率能力·································································.·“·“··”····““.35

4.6机械试验和测量程序···“·······································””············”····..·..·..·..·..·”…，…36

4.6.1目的·············‘···························································································……36

4.6.2概述·””·”····”·”·····””·······”·”····”·····””····”·”··””·”··”···“·······“···“······“……36

4.6.3振动(正弦》····“·“····“···“·····““·······“···”·“·”·····””·“····”·······”·············”……36

4.6.4光纤有效性“·····““··········“·“····“··“···“·“····”·”····”··········””····”················……37

4.6.5静态负荷···“·····““·“·“·”··”“·”·”·”·····””·”·”·”·····””·”··············“············“……38

4.6.6光缆抗拉··········”····················“·“··““·“·····““·“·····““·······”·············”···”··一·39

4.6.7光缆扭转················“··“········”“·······“·“·”·····”·········”·····························”·一·39

4.6.8锁紧机构强度·············……‘····”·······················································“·····“·“·…40

4.6.9弯矩”·····”·······························”·············································“····““·····““一41

4.6.10碰撞··········································································”····“····”····”·······“一41

4.6.11冲击··········································································”····”····”·····””····”一42

4.6.12抗挤压·················································································“··““··““····“…43

4.6.13轴向挤压···························································”·······””····”····“··”“·····““·44

4.6.14撞击···························································”············”·············“····“·”··”“·45

Gs/T13265.1一1997

4.6.15恒加速度·············。·······。·························”，········································……46

4.6.16跌落·····························。·······················“·“··········································一·47

4.6.17锁紧检验力矩.·48

4.6.18光缆下垂·······························································································……49

4.7气候、环境试验和测量程序····················...····”············································”··……50

4.7.1目的·········································································································……50

4.7.2概述·······························································································..········……50

4.7.3霉菌生长······“····”···················································································……50

4.7.4寒冷······”·····”·······················“·······················································”·····……51

4.7.5干热········“·······················”····“·“·························································……52

4.7.6稳态湿热············“·····“·················…·…”·”…·“·…·…”···························..··…·…53

4.7.7气候顺序····.，························”·····“”·”································“·“·····“·········……54

4.7.8冷凝·····································································“·“···”·“·“···················……56

4.7.9温度变化····························································································”··“…57

4.7.10密封(面板密封和阻挡层密封)·············……”········..····················…·…””····…·…”58

4.7.11密封(浸水)···········································”······“································””·····一·58

4.7.12密封(气密封)····························································“·”·””···················……59

4.7.13腐蚀性大气(盐雾)60

4.7.14尘埃.·61

4.7.15工业大气(二氧化硫)·····································································”····……63

4.7.16有焰燃烧(着火危险)···························································“·……·‘····……63

4.7.17低气压········································································”“··········”·”··““·……64

4.7.18太阳辐射··························································································””··”…“

4.7.19核辐射····························································”·············”·”·”··········“···……“

4.7.20机械耐久性··············································································“·“··““····……66

4.7.21高温耐久性···············。······························································”·”··”····”·”…66

4.7.22耐溶剂和污染性液体······························”·”·······················“······…·…·‘’二’二”‘67

附录A(提示的附录)尺寸测量···························…·…”··········…·…“········…·…’二’二”‘69

附录B(提示的附录)参考文件··························································”······”··”·…二‘’”70

GB/T13265.1一1997

前言

本标准是根据国际标准IEC1202-1:199“纤维光学隔离器第1部分:总规范》对国家标准GB/T

13265-91纤《维光学隔离器总规范》进行修订的，在技术内容和编写规则上均与之等同。以适应国际贸

易、技术和经济交流的需要。

本标准所等同采用的国际标准是以我国提案为墓础并由我国技术人员作为项目负责人主持制定

的。它与原有的我国国家标准GB/T13265-91相比较，增加了若干重要的技术内容。例如，所提出的测

量与试验方法由26项增加为49项，质f评定体系进一步完善，等等。

本标准由中华人民共和国电子工业部提出。

本标准由电子工业部标准化研究所归口。

本标准负责起草单位:上海传输线研究所、电子工业部标准化研究所。

本标准主要起草人:黄浩显、包成良、李淑培、傅椒云、王毅。

GB/T13265.1一1997

IEC前言

1)IEC(国际电工委员会)是由各国家电工委员会((IEC国家委员会)组成的世界性标准化组织。IEC

的目的是促进电工电子领域标准化问题的国际合作。为此目的，除其他活动外，IEC发布国际标准。国际

标准的制定由技术委员会承担，对所涉及内容关切的任何IEC国家委员会均可参加国际标准的制定工

作。与IEC有联系的任何国际、政府和非官方组织也可以参加国际标准的制定。IEC与国际标准化组织

(ISO)根据两组织间协商确定的条件保持密切的合作关系。

2)IEC在技术问题上的正式决议或协议，是由对这些问题特别关切的国家委员会参加的技术委员

会制定的，所涉及的问题尽可能地代表了国际上的一致意见。

3)这些决议或协议以标准、技术报告或导则的形式发布，以推荐的形式供国际上使用，并在此意义

上，为各国家委员会认可。

4)为了促进国际上的统一，各IEC国家委员会有责任使其国家和地区标准尽可能采用IEC标准。

IEC标准与相应国家或地区标准之间的任何差异应在国家或地区标准中指明。

5)IEC未制定使用认可标志的任何程序，当宣称某一产品符合相应IEC标准时，IEC概不负责。

国际标准IEC1202-1由IEC第86技术委员会(纤维光学)的第86B分技术委员会(纤维光学互连

器件和无源器件)制定。

本标准文本以下列文件为依据:

厂一M67u*{表决报告·{

86B中‘央办公0143}86B中‘央办公室)177A

表决批准本标准的详细信息可在上表中列出的表决报告中查阅。

在纤维光学隔离器总标题下，1EC1202由下列部分组成:

第1部分:总规范

第1-1部分:空白详细规范

附录A和附录B仅供参考。

Gs/T13265.1一1997

弓!言

本标准共分为4章。

第1章为总“则”，包括本标准有关的一般信息。

第2章为要“求”，规定了本标准所包括的隔离器必须符合的全部要求。本章中包括对产品分类、规

范体系、文件、材料、工艺、质量、性能、识别标志和包装等方面的要求。

第3章为“质量评定程序”，规定了本标准包括的产品进行适当质量评定所必须遵循的全部程序。

第4章为“测量与环境试验程序”，规定了质量评定的测量方法和环境试验程序。

中华人民共和国国家标准

纤维光学隔离器GB/T13265.1一1997

第1部分:总规范fatIEC1202-1:1994

000

以:830

代替GB/T13265-91

Fibreopticisolators-

Part1:Genericspecification

1总则

1.1范围

本标准适用于纤维光学领域中采用的具有下列特性的纤维光学隔离器门类:

—为非互易性光器件;

—为无源器件，不含有光电或其他变换元件;

—具有定向传输光信号的两个端口，端口通常为光纤连接器或光窗口。

—为波长敏感性器件。

本标准旨在对下列内容确立统一要求:

—光学、机械和环境特性或性能参数，

—分类;

—质量评定程序;

—试验和测量方法。

1.2引用标准

下列标准所包括的条文，通过在本标准中引用而构成为本标准的条文。本标准出版时，所示版本均

为有效。所有标准都会被修订，使用本标准的各方应探讨使用下列标准最新版本的可能性。

IEC和ISO各成员国保留注册现行有效的国际标准。

IECQC001001:1986IEC电子元器件质量评定体系((IECQ)基本章程

IECQC001002:1986IEC电子元器件质量评定体系(IECQ)程序规则

IEC27-1:1992电工技术中采用的文字符号—第1部分:总则

IEC50(731):1991国际电工词汇(IEV)第731章:光纤通信

IEC68-1:1988基本环境试验规程第1部分:总则和导则

IEC68-2-1:1990基本环境试验规程第2部分:各种试验—试验A:寒冷

IEC68-2-2:1974基本环境试验规程第2部分:各种试验—试验B:干热

IEC68-2-3:1969基本环境试验规程第2部分:各种试验—试验Ca:稳态湿热

IEC68-2-5:1975基本环境试验规程第2部分:各种试验—试验Sa:模拟地面的太阳辐射

IEC68-2-6:1982基本环境试验规程第2部分:各种试验—试验Fc和导则:振动(正弦)

IEC68-2-7:1983基本环境试验规程第2部分:各种试验—试验Ga和导则:恒加速度

IEC68-2-9:1975基本环境试验规程第2部分:各种试验—太阳辐射试脸导则

IEC68-2-10:1988基本环境试验规程第2部分:各种试验—试验J和导则:霉菌生长

IEC68-2-11:1981基本环境试验规程第2部分:各种试验—试验Ka:盐雾

国家技术监，局1997一10一05批准1998一09一01实施

1

GB/T13265.1一1997

IEC68-2-13:1983基本环境试验规程第2部分:各种试验—试验M:低气压

IEC68-2-14:1984基本环境试验规程第2部分:各种试验—试验N:温度变化

IEC68-2-17:1978基本环境试验规程第2部分:各种试验—试验B:密封

IEC68-2-27:1987基本环境试验规程第2部分:各种试验—试验Ea和导则:冲击

IEC68-2-29:1987基本环境试验规程第2部分:各种试验—试验Eb和导则:碰撞

IEC68-2-30:1980基本环境试验规程第2部分:各种试验—试验Db和导则:湿热循环(12h

+12h循环)

IEC68-2-38:1974基本环境试验规程第2部分:各种试验—试验Z/AD:温度/湿度组合循环

试验

IEC68-2-42:1982基本环境试验规程第2部分:各种试验试验Kc:接触点和连接件的二氧

化硫试验

IEC410:1973计数检查抽样方案和程序

IEC617:1983图形符号

IEC695-2-2:1991着火危险试验第2部分:试验方法—第二篇:针焰试验

IEC793-1:1992光纤第1部分:总规范

IEC794-1:1993光缆第1部分:总规范

IEC825:1984激光产品安全

IEC869-1:1988纤维光学衰减器第1部分:总规范

IEC874-1:1993光纤光缆连接器第1部分:总规范

IEC875-1:1992纤维光学分路器第1部分:总规范

IEC102导则:1989电子元器件质量评定的规范结构(鉴定批准和能力批准)

ISO129:1985技术制图—尺寸标注—总则，定义、标注方法和专门标注

ISO286-1:1988ISO极限和配合体系第1部分:基本公差，偏差和配合

ISO370:1975尺寸公差—英寸和毫米的相互换算

ISO1000:1992国际单位制和推荐使用的该单位制倍数以及某些其他单位

ISO1101:1983技术制图—几何公差—形位公差、定向、定位和偏差—通则、定义、符号，图

的标注

ISO8601:1988数据单元和换算公式—信息交换—日期和时间表示法

1.3定义

本标准采用下列定义和IEC50(731)中的定义。

1.3.1纤维光学隔离器fibreopticisolator

系为非互易性光器件，旨在抑制沿光纤传输线路的后向反射，同时在正向具有最小的插入损耗。通

常纤维光学隔离器用以消除反射光返回激光器中，因反射光能使激光二极管振荡导致不稳定并在纤维

光学传输系统中引起噪声。以下简称隔离器。

1.3.2基于磁光效应的块状隔离器bulkisolatorbasedonmagneto-opticeffect

具有分立元件的一种隔离器类型。分立元件包括合适的磁光晶体(铁磁晶体或顺磁玻璃、抗磁玻璃

等)，其基本原理基于磁光效应。例如，它由起偏器、45。法拉弟旋转器和检偏器等组成。起偏器和检偏器

间的方位角整定为互成450。它还具有适当的磁路、祸合器件等。线偏振注人光在旋转元件中将相对于

其偏振平面产生45。转角并以低插入损耗通过隔离器，而反向光不论其偏振状态如何都被阻断。

1.3.3全光纤隔离器allfibreisolator

系为在光纤自身中产生磁光效应的一种隔离器类型。

1.3.4集成光波导隔离器integratedopticalwaveguideisolator

在合适的基片上外延磁光晶体薄层或电光晶体薄层以获得TE模与TM模间非互易模式转换的一

GB/T13265.1一1997

种隔离器类型。这种隔离器的结构与激光二极管、其他集成光波导器件和传输线波导结构是相容的。

1.3.5与偏振无关的光隔离器polarizationindependentopticalisolator

系指反向损耗和插人损耗均与人射光偏振状态无关的一种隔离器类型。这种隔离器相对于偏振依

赖隔离器而言。

1.3.6端口port

系指接在光隔离器上的光纤、光纤光缆连接器或其他藕合器件，供光功率进出用，或为一窗口，供光

束直接祸合。

1.3.7输入端口，输出端口inputport,outputport

分别指标定的光功率输入的端口和输出的端口。作为一种非互易器件，隔离器是具有方向性的器

件，应在详细规范中标定输人、输出端口并在器件上清晰地加以标志。

1.3.8隔离器的正向forwarddirectionofanopticalisolator

光源光功率注人隔离器输人端口的工作方向。在此方向上隔离器具有最小的插入损耗。

反向是正向的相反方向。

1.3.9隔离器的插入损耗(正向损耗)insertionloss(forwardloss)ofanopticalisolator

隔离器正向插入一段光纤或光路中所造成光功率降低的量度，以分贝表示。插入损耗规定为:

IL=一IOlg(P./P;)(dB)

对于偏振依赖性隔离器，式中Po为隔离器输出端口接收的光功率，P;为注入愉入端口的、与隔离

器中起偏器偏振方向相一致的线偏振光的光功率。

1.3.10隔离器的反向损耗(隔离度)backwardloss(isolation)ofanopticalisolator

隔离器反向插入造成的光功率降低的量度，以分贝表示。注入端口为隔离器输出端口，接收端口为

其输人端口。反向损耗由下列公式给出:

BL=一101g(尸./Pb;)(dB)

式中尸为在隔离器输人端口测得的由P;注‘人其输出端口引起的光功率。pie为远端光路器件反向反射

进被测隔离器输出端口的光功率。

1.3.11工作波长operatingwavelength

隔离器的标称波长，该隔离器被设计为在此波长下工作具有规定的光学性能。

1.3.12工作波长范围operatingwavelengthrange

标称工作波长凡由入。至;'ma二的规定波长范围，隔离器被设计为在此波长范围内工作具有规定的光

学性能。

1.3.13偏振调节器polarizationadjuster(PA)

为了测量目的而调节人射光束偏振状态(即偏振方向，线性度或强度)的装置或处理器。

1.3.14互换的隔离器interchangeableisolator

具有相同的安装几何参数和相同的基本光学性能的隔离器被认为是互换的隔离器。

要求

本章包括的对隔离器的要求旨在有助于在详细规范中对隔离器分类。隔离器技术的发展可能增加

或改变要求条款。

2，分类

隔离器可按下列类型分类:

—类型;

—品种;

—规格;

一气候类型;

cB/T13265.1一1997

—评定水平。

下面给出典型隔离器分类示例:

类型—名称:型号BIFR

法拉弟旋转式块状隔离器

工作波长:1.30Im

—偏振状态:非偏振依赖型

品种—结构:C

—连接器型号:FC

—光纤型号:Bl.2

规格—安装方式

气候类别:05/085/04

评定水平:A

2.1.1类型

按照制造技术，隔离器可分类为:

—基于磁光效应的块状隔离器;

—全光纤隔离器;

—集成光波导隔离器;

—其他类型。

注:类型分类的其他方法也适用.例如:

—按照偏振选择性，分为偏振依赖型隔离器和非偏振依赖型隔离器。

—按照工作原理，分为基于磁光法拉弟效应、科顿一蒙顿效应、克尔效应设计的隔离器。

—按照工作波长，分为短波长隔离器(如:0.63pm,0.85pm)'}、长波长隔离器(如:1.30Km,

1.55ktm)等等。

2.1.2品种

根据所采用的光纤类型、连接器类型、光缆类型、外壳形状、尺寸和结构等，隔离器可分为各种品种。

隔离器端口结构分类如下:

A型结构—具有完整的尾光纤(缆)而无连接器的器件。

隔离器

B型结构—具有完整的尾光纤(缆)并在每一尾纤端部均带有连接器的隔离器。

隔离器

连接器连接器

一卜土一一一一止一一

采用说明:

1]根据实际情况，比IEC1202-1增加了波长。.85Mm.

GB/T13265.1一1997

C型结构—连接器作为隔离器外壳一个组成部分的器件。

Ag亡沛a

D型结构—具有供平行光束直接祸合的端口的隔离器，通常块状隔离器为其典型。

隔离器

压习

E型结构—具有上述端口结构的某种组合的隔离器。例如:

隔离器隔离器

连接器

一卜一一

注:也有其他品种分类。

2.1.3规格

隔离器的规格确定了结构类似器件的共同特征。用于确定规格的特征举例如下(但不限于这些例

子):

—有关外壳端口的位置和方向;

—安装方式。

2.1.4气候类别

隔离器可按照IEC68-1附录A中规定的气候类别进行划分。

2.1.5评定水平

详细规范应包括质量评定所需要的全部试验。

每项试验应被分到A,B,C,D组这四个组中的其中一组。

详细规范应规定一种或一种以上评定水平，每一种评定水平应用大写字母表示。评定水平规定A

组和B组的检查水平/合格质量水平(AQL)以及C组和D组检查的周期之间的关系。

优先评定水平如下:

评定水平A:

-A组检验:检查水平II,AQL=4%，

—B组检验:检查水平I,AQL=4oo;

—C组检验:周期为24个月;

-D组检验:周期为48个月。

评定水平B:

-A组检验:检查水平II,AQL=loos

-B组检验:检查水平II,AQL=1oa，

—C组检验:周期为18个月;

—D组检验:周期为36个月。

评定水平C:

GB/T13265.1一1997

—A组检验:检查水平I,AQL=0.4%;

—B组检验:检查水平I,AQL=0.40a;

—C组检验:周期为12个月;

—D组检验:周期为24个月。

A组和B组检验应以逐批检验进行，C组和D组检验应以周期检验进行(见3-3)。在详细规范中可

以增加一附加评定水平(不同于上述规定)。当增加附加评定水平时应采用大写字母X,

2.2文件

2.2.1符号

除非本标准另有规定，凡有可能时图形和文字符号应从IEC27和IEC617中选择。

2.2.2规范体系

本标准是三层IEC规范体系的一部分。所属规范应由空白详细规范和详细规范组成。规范体系见

表1。对于隔离器没有分规范。

表1三层IEC规范结构

规范层次可能包括的信息示例适用于

评定体系规则

检验规则

环境试验方法

抽样方案

识别规则