【正文】 錄隨時間變化的腐蝕情況（因此可以了解隨時間變化的腐蝕速率）。 Parameter參數 Unit 單位 Value 數值 GIE diameter range GIE直徑范圍 mm 50247。 北京和德宇航技術有限公司 China Head Aerospace Technology Co. Page： 4/31 Figure 1 Diagnostic system for GIE erosion measurement: front view (top), System placed in a parking position when the thruster is firing (bottom) 圖 1 用于 GIE 腐蝕測量的診斷系統(tǒng)，正面圖（上圖），推進器點火時系 統(tǒng)處于固定位置（下圖） The system consists of a supporting structure and of an inspection optical head. The supporting structure includes the following main subsystems: 系統(tǒng)由一個支持結構和一個光學探頭組成。圖像采集時有四盞 LED 燈或激光線束為推進器照明。推進器點火時，該系統(tǒng)保持在一個固定位置（圖 1底部），因此不會接觸到等離子羽流。 Telemicroscopy System for Gridded Ion Engines 柵極離子發(fā)動機遠程顯微鏡系統(tǒng) Alta provides an innovative diagnostics to measure the erosion of the grid holes in Gridded Ion Engines (GIE). Alta 為柵極離子發(fā)動機網格空腐蝕情況的測量形成了一種新型的診斷方法。 北京和德宇航技術有限公司 China Head Aerospace Technology Co. Page： 1/31 ALTA 公司柵極腐蝕在線測量系統(tǒng) 技術建議書 北京和德宇航技術有限公司 China Head Aerospace Technology Co. Page： 2/31 1 Introduction 引文 Scope 范圍 At the end of May 2020 Head Aerospace has requested Alta to provide a formal quotation for an Erosion Measuring System (EMS) to be implemented in a new vacuum chamber of the Customer, the Lanzhou Institute of Physics (LIP), to be used to assess erosion of Gridded Ion Engines. 2020年 5月底和德公司要求 Alta 為可應用于 510（ LIP）所新型真空灌的腐蝕測量系統(tǒng)（ EMS）給出正式報價，該系統(tǒng)用于評估柵極離子發(fā)動機（ Gridded Ion Engines）的腐蝕情況。 Applicable documents 適用文件 The following is the plete list of documents to be considered applicable to this proposal: 下表列出了可適用于該投標的所有文件： Acronyms and abbreviations 首字母縮略詞與縮寫詞 首字母縮略詞 /縮寫 Meaning 含義 ATP Authorization To Proceed 授權進行 CO CloseOut 完結 DAQ Data AcQuisition 數據采集 EP Electric Propulsion 電推進 EMS Erosion Measuring System 腐蝕測量系統(tǒng) FFP Firm Fixed Price 固定總價 FMEA Failure Mode and Effects Analysis 失效模式與影響分析 FSO Full Scale Output 全量程輸出 GIE Gridded Ion Engine 柵極離子發(fā)動機 HET Hall Effect Thruster 霍爾效應推進器 HW Hardware 硬件 I/F,IF InterFace 接口 IR Infra Red 紅外線 LIP Lanzhou Institute of Physics 510 所 北京和德宇航技術有限公司 China Head Aerospace Technology Co. Page： 3/31 MAI Manufacturing,Assembly, Integration 制造，部裝，集成 NDA NonDisclosure Agreement 保密協(xié)議 QM Qualification Model 鑒定樣機 RPA Retarding Potential Analyzer 減速電勢分析儀 SW Software 軟件 TBC To Be Confirmed/To be Clarified 留待確定 TBD To be Determined/Defined 留待決定 TC ThermoCouple 熱電偶 VDC Volt Direct Current 直流電壓 2 Introduction 簡介 The present section describes the telemicroscopy and erosion facility implemented in Alta IV4 facility. 本章將介紹 Alta IV4 設備所采用的遠程顯微鏡和腐蝕測量設備。 The Telemicroscopy diagnostic system consists of a special camera mounted on a movable structure placed inside the vacuum facility. The system is maintained in a parking position while the thruster is firing (Figure 1 bottom), so that it does not interfere with the plasma plume. When the thruster stops firing, the Telemicroscopy system is moved in front of the thruster to perform the erosion measurement. Four led lights or a laser line beam illuminate the thruster during the image acquisition. The motion of the diagnostic system is obtained through two separate stepper motors one governing the arm rotation, the other controlling the arm translation. 遠程顯微診斷系統(tǒng)為一個專用相機固定于可移動結構上，并放置于真空設備內部。推進器關閉后，遠程顯微鏡系統(tǒng)移動到推進器前方對 腐蝕情況進行測量。診斷系統(tǒng)的移動由兩個分開的步進電機控制，一個控制臂的旋轉，一個控制臂的移動。支持結構主要由以下 分系統(tǒng) 夠成： ? Translation stage 移動臺 ? Rotation stage 旋轉臂 ? Sustaining arm 支撐臂 ? Protective box保護箱 The optical head consists of a long working distance objective with the following characteristics: 光學探頭具有長工作 距離 物鏡，其特性如下 : Parameter 參數 Unit 單位 Value 數值 Field of view 視場 mm Resolution 分辨率 mm Depth of Field 景深 mm Working Distance 工作距離 mm 175 北京和德宇航技術有限公司 China Head Aerospace Technology Co. Page： 5/31 The measurement system allows the inspection of the acceleration grid (measurement of the hole diameter variation across a diameter of the grid). 系統(tǒng)也可進行加速極檢測（通過一個網格的直徑測量孔徑的差異）。300 Image resolution 圖像分辨率 μm 5 Field of view 視場 mm Measurement type測量種類 Hole diameter孔徑 Grid deformation 網格變形 Working distance工作距離 mm 175 The Telemicroscopy system has been designed with the aim of performing successive erosion measurements during GIE tests with no need of reopening the vacuum chamber. This greatly reduces the risk of contamination and saves a considerable amount of time if multiple measurements are to be taken along an endurance test. The remarkable advantage of performing a series of successive measurements lies in the opportunity of recording not only the total erosion after a certain number of firing hours, but also a timehistory of the erosion (thus providing information about how the erosion rate varies in time). 遠程顯微系統(tǒng)的設計可在 GIE 測試時進行連續(xù)腐蝕測量，而無須再次打開真空灌，這大大減小了污染的風險，并且為耐久試驗的多次測量節(jié)省了大量的時間。 Figure 2 Calibration images taken on a brand new grid 圖 2 全新網格的校準圖像 北京和德宇航技術有限公司 China Head Aerospace Technology Co. Page： 6/31 InfraredCamera System for HET Temperature Measurement 用于 HET 溫度測量的紅外照相機 By using an infrared camera it is possible to monitor the temperature of the thruster assembly during the test. Alta provides an advanced diagnostic system with the infrared camera installed right inside the vacuum chamber