【正文】 3 Customer requirements 用戶需求 Introduction 引文The Lanzhou Institute of Physics aims at the measurement of the grid erosion produced on 1 kWclass ion engines to be placed in a dedicated new vacuum chamber and subjected to long duration tests. Accuracy, easiness of use, and reliability of the system are the key requirements that will be detailed in the next sections.510所旨在測量其專有的新型真空灌內(nèi)1kW級等離子發(fā)動機(jī)所產(chǎn)生的柵極腐蝕，并進(jìn)行長期測試。 測量不確定度：所測值的2K（T 100176。 光譜范圍：8…14 微米 216。連續(xù)測量的最大優(yōu)勢不僅可以記錄工作數(shù)小時后的整體腐蝕情況，也可以記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）。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(yuǎn)程顯微診斷系統(tǒng)為一個專用相機(jī)固定于可移動結(jié)構(gòu)上，并放置于真空設(shè)備內(nèi)部。C 3) 200 1000 176。 溫度分變率：80 mK (range 1, 30 176。 種I/O數(shù)字分類：數(shù)字輸入（觸發(fā)），數(shù)字輸出（警報）216。 o Temperature: 040 176。216。延長維護(hù)期，包括備用件，應(yīng)作為可選項包含在報價內(nèi)。 the reflective properties of the metallic grid that sometimes make it difficult to clearly detect the pit/groove profile. EMS overall dimensions EMS整體尺寸The following pictures show the IV4 EMS system installed in the facility, that has the same diameter (2 meters) of LIP’s one. The overall envelope of the structure, including the positioning in the safe zone is: l Width of 750 mm (maximum when the arm is in the safe parking position and longest horizontal guide is used) l Height of 550 mm l Depth of 600 mm (maximum when the arm is in the measuring position)下圖是安裝于設(shè)備當(dāng)中的IV4EMS，與510所的直徑相同（2m）。l 如采取低溫冷卻，再次重復(fù)拍攝（真空罐內(nèi)溫度的變化引起第二階段的結(jié)構(gòu)變形）。 DaQ and Control Software DaQ與控制軟件All the acquisition and control software will be programmed in LabView environment and provided as Windows OS executable files.所有的采集與控制軟件將在Labview環(huán)境下編程，并且為Windows OS可執(zhí)行文件。Once the final system for LIP will be realized, Alta will provide the detailed list of ponents and possible spare parts along with suggestions for procurement both in China or through Alta. Alta and LIP will agree at the contract signature how to act with regards to items provided by third parties, in particular the cameras and the related spare parts.一旦為510所提供最終系統(tǒng)形成，Alta將提供詳細(xì)的部件清單和備用件，以及在中國或通過Alta的采購建議。Two puters will be needed, one to drive the picture camera(s) and the other for the IR thermography。相機(jī)的信號饋入使用USB頻道還是Giga以太網(wǎng)，取決于真空罐環(huán)境。l 系統(tǒng)的最大缺陷是質(zhì)量合格的3D圖像不斷重建，但坑/槽定量測量的不確定度高于利用線形光源。例如，設(shè)備在真空中連續(xù)數(shù)月后，會受低溫環(huán)境的影響（例如充滿液體氮的真空罐），促動器無法將相機(jī)重復(fù)安放在同一位置，軟件便可利用參考點自動調(diào)整。R16 – Maintenance, Training, and Spare Parts維護(hù)，培訓(xùn)和備用件An extensive training in use of the ESM should be given by Alta personnel to LIP personnel during the system missioning. Two years of free maintenance with a total of 2 visits to China should be included in the offer. A list of ponents and spare parts should be provided with the system, with detailed information on the procurement. Remote support for operation of the system should be included as part of the offer. An option concerning a longer maintenance period including spare parts should be included.針對EMS使用，Alta應(yīng)對510所人員進(jìn)行培訓(xùn)。216。R02 – Primary erosion measurement初始腐蝕測量The primary erosion measurement will be concerned with the hole erosion on the external grid (a dimension change of few percentage points should be considered as target for the minimum detectable erosion).初始腐蝕測量主要涉及的是外部柵極的孔腐蝕（最小可測腐蝕應(yīng)考慮到幾個百分點的外形變化）。 測量距離：75mm到無限遠(yuǎn)216。 2) 150 800 176。Alta提供的帶有紅外照相機(jī)的診斷系統(tǒng)科直接安裝于真空管內(nèi)部，以獲得被測物體的最佳視圖。 北京和德宇航技術(shù)有限公司 China Head Aerospace Technology Co. ALTA公司柵極腐蝕在線測量系統(tǒng)技術(shù)建議書1 Introduction 引文 Scope 范圍At the end of May 2013 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.2013年5月底和德公司要求Alta為可應(yīng)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(jī)（Gridded Ion Engines）的腐蝕情況。此外，相機(jī)更加靠近推進(jìn)器，可獲得較高的空間分辨率（放置在真空罐外部的紅外相機(jī)只能通過一個可用視點照射）。C 252。 工作溫度：10…50 176。R03 – Secondary erosion measurement 二次腐蝕測量Pitgroove erosion should also be measured, if possible (if patible with resolution and illumination). 如可以也應(yīng)測量坑槽腐蝕（如果符合分辨率與光照條件）R04 – Additional Feature附加特性If possible, the ESM software should allow a posteriori reconstruction of a 3D image from two separate pictures taken with slightly different angle of the camera(s).如果可以，ESM軟件通過兩張角度略有差別的圖像可后期合成3D圖像。 可測量腐蝕的圓圈直徑，線性長度，坑/槽處深度（非實時）。報價中應(yīng)含有兩年的免費(fèi)維護(hù)和2次到中國的上門服務(wù)。5） EMS在推進(jìn)器關(guān)閉時工作。 Secondary grid erosion measurement (option) 二次網(wǎng)格腐蝕測量（可選）An additional feature that could be implemented in Alta present system is the hole erosion measurement of the internal grid. If the grid position is patible with the camera focus regulation it should be possible to obtain focused images of the back grid holes and therefore retrieve their erosion. Of course in this case only hole diameter could be measured. Alta現(xiàn)有系統(tǒng)可執(zhí)行的附加功能有內(nèi)部網(wǎng)格孔腐蝕的測量。Figure 12: Example of mercial feedthroughs to insert in a flange circular hole圖12 商用饋入裝置插入凸緣圓孔實例 Preliminary Calibration procedure 初步校準(zhǔn)程序The preliminary calibration will be based on the following setup and procedure:l The EMS will be mounted inside the vacuum chamber wi