必威娱乐老虎机客户端 |太阳能电池片洁净度检测测量三-be

 

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太阳能电池片洁净度检测测量三
 

Cost Impact Of Cleanliness Levels 清洁水平的成本对比

         Cleaning cost - directly proportional  to level of cleanliness

         清洁成本-与清洁度水平直接成正比

         Non-conformance level - indirectly   Proportional to  level of cleanliness

                   不符水平-与清洁度水平间接成比例

         Total cost = cost  of cleaning + cost  Of non-conformance

                   总成本=清洁成本+不符水平 

 

Selection Criteria - Cleanliness Measuring Methods
选择标准-洁净度检测方法

         Types of contaminant污染类型

         Types of substrate基板类型

         Level of cleanliness洁净水平

         Measurement speed测量速度

         Acquisition & operating cost 获得和运行成本

         Skill level required技术水平要求

         Features of the measurement method

         测量方法特性

         Non-contact, non-destructive无接触,无损伤

         Direct or indirect 直接或间接

 

Suggested Approaches: Defining Acceptable Cleanliness Level
推荐的方法:定义合适的洁净等级

         Baseline testing基线测试

 

         Controlled experiment 控制实验

 

Baseline Testing基线检测

         Measure cleanliness level of the current process当前工艺洁净等级测量

         Measure non-conformance rate attributed to surface cleanliness表面洁净度属性不符率测量

         If this measured rate is too high, then improve surface cleanliness process如果测量出的这种比率过高,那么改善表面清洁工艺

         If this measured rate is acceptable, then cleanliness level of current process becomes acceptable level如果测量出的这种比率合适,那么当前工艺的清洁等级就是合适的等级

         If this measured rate is too low, then un-improve surface cleanliness process弱国测量出的这种比率过低,那么调低表面清洁工艺

 

 

Controlled Experiment
控制实验

         Define the desired “success” level定义需求合适等级

         Prepare parts with varying surface   cleanliness level准备不同表面洁净等级的部件

         Measure and record surface cleanliness levels测量并记录表面洁净等级

         Perform the next operation

         执行下一个操作

         Measure the “success” level of the operation

         测量这个操作的合适等级

         Correlate cleanliness level to “success” level of the operation

         将这个操作合适等级同洁静等级关联

Example.例子

         Parts are coated with a film.

         部件用薄膜涂覆

         “Success” = desired adhesion.

         合适=需要的粘着系数

         “Success” level = minimum adhesion   measured as peel strength.

         合适等级=剥离强度下测量的最小粘着系数

         Establish surface cleanliness limits

         建立表面洁净度限值

         Limits based on minimum “success”   measure desired

         基于最小合适需求的测量限制

         Implement cleanliness measurement    method

         实施清洁度测量方法

         Begin monitoring of cleanliness process   to established cleanliness limits

         从监控清洁工艺至建立洁净度限值

 

Surface Cleanliness Vs.Peel Strength
表面洁净度 Vs 剥离强度

  

 

OSEE Principle
光学受激电子发射原理

        Surface exposed to UV light

        紫外线光照射表面

        UV light causes surface to emit electrons

        紫外线光另表面发射电子

        Emitted electrons  collected and converted into a voltage signal

        发射的电子聚集并转化成电压信号

        In general, clean surface gives high emission

        通常,洁净的表面会有更高的发射

        Surface contamination partially blocks:

        表面污染部分阻碍:

        The UV light reaching the surface

        紫外光到达表面

        The flow of electron away from surface

        电子流离开表面

        Contamination causes a drop in measured signal

        污染会引起测量信号的一个回落

 

 

How it works

它如何工作

  

 

Cleanliness Monitoring of Solid Rocket Motor (SR, M) Using OSEE
使用光学受激电子发射的Solid Rocket Motor (SRM)洁净监测

         SRM is made up of several segments of D6AC steel, approx. 13 feet diameter and 10 feet long.

         固态引擎电机由几段D6AC钢制成,直径约13英尺,长约10英尺

         Segments are mechanically fastened to each other with a groove/ring arrangement.

         各段用一个凹槽/圈组合固定彼此

         This joint also houses the infamous “O” ring.

         连接处也覆盖在“O”型圈内

         An asbestos/rubber lining covers the inside surface of SRM including the joints

         一个石棉/橡胶内衬覆盖固态引擎电机及接头内表面

         Solid propellant is then cast into the SRM

         然后固体推进剂被掷入固态引擎电机

         During the launch the propellant burns and generates intense heat

         推进剂燃烧之前期间,产生高强度的热量

         Several approx. 1 square foot sections of D6AC steel were prepared with varying degree of surface contamination

         准备几个不同程度表面污染约1平方英尺区域的D6AC

         Surface cleanliness of these samples was measured and recorded

         测量这些样品的表面洁净度并记录

         Next the lining was bonded to these sections

         内衬边缘与这些区域连接

         Peel tests were performed to measure the adhesion strength of the lining

         执行剥离实验是为了测量内衬的粘着强度

 

 

        OSEE Vs. Contamination Level
      光学受激电子发射Vs污染等级
  

 

        Peel Strength Vs. Contamination Level
      剥离强度Vs污染等级
 


Cleanliness Monitoring of Solid Rocket Motor (SRM) Using OSEE
使用光学受激电子发射的Solid Rocket Motor (SRM)洁净监测

         The predominant contaminant is HD2 grease that fluoresces

         主要的污染是发荧光的HD2油脂

         Prior to the use of OSEE surface cleanliness was checked with black light

         使用光学受激电子发射表面清洁之前需用黑光检测

         The lowest level of contamination that could be detected was 100mg/ft2

         可检测的最低等级污染是100mg/ft2 毫克/平方英尺

 

         This level of contamination resulted in an average peel strength of 50 pounds per linear inch (PLI)

         这种等级的污染导致一个50每线性英尺的平均剥离强度

         An acceptable level of 150 PLI was established

         合格等级150/线英寸建立

         This level of peel strength corresponds to an OSEE reading of  900

         这种剥离强度等级与读取值900的光学受激电子发射相对应

         Currently, in SRM production, this is the minimum acceptable level of OSEE reading

         当前,在SRM生产中,这是光学受激电子发射读取的最小标准等级

 

Summary总结

         Why monitor cleanliness 为什么要检测洁净度?

         Types of contamination 污染类型

         Types of cleanliness measurement methods洁净度检测方法类型

         Most common verification/measurement methods最常用的确认/测量方法

         Criteria for selecting a cleanliness monitoring method选择清洗监测方法标准

         Cost impact of cleanliness level清洁度水平的成本影响

  ,        Suggested approaches to defining acceptable limits 推荐的定义合适限值的方法

         Example of defining acceptable limits定义标准限值示例

         Summary 总结

 
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