本文選題：模擬月壤 + 熱特性�。� 參考：《沈陽理工大學》2016年碩士論文

【摘要】：月球表面的溫度和熱物性參數(shù)是月表熱環(huán)境的兩個主要內(nèi)容,是研究月球內(nèi)部熱演化模型的基本邊界條件,也是解譯微波探測數(shù)據(jù)的必要參數(shù)。從科學意義上講,獲取真實可靠的月面熱物性參數(shù),可以使我國掌握比較精確、可靠、完整的月面熱環(huán)境特性數(shù)據(jù),填補我國在月面熱環(huán)境特性知識方面的空白,為建立月球基地和進一步開發(fā)研究奠定必需的熱環(huán)境認識基礎;從工程應用角度看,以簡單而粗略的熱環(huán)境參數(shù)為依據(jù)的熱控設計將難以滿足探測器月面活動的需要,必須進一步獲取詳細、準確的月面熱物性數(shù)據(jù)。月壤硬度是指月面探測機械的動靜載荷傳遞于土壤上,土壤對這些外荷力所發(fā)揮的抵抗力。因此測量這種土壤性質對月面探測,甚至將來的基地建設都是必不可少的理論依據(jù)。本文首先研究了地面土壤硬度測量原理,且最終選用比較有代表性的圓錐指數(shù),作為衡量模擬月壤硬度的參數(shù),并指導模擬月壤硬度傳感器的設計;同時,研究了土壤熱特性測量原理,且選擇了比較適合用于粉末狀材料熱特性測量的熱探針原理,用于指導模擬月壤熱特性測量傳感器的設計。然后,在以上測量理論的指導下,進行硬度傳感器和熱特性測量傳感器的前端結構研究和設計、嵌入式軟硬件系統(tǒng)的設計。硬度探頭的設計,包括彈性體的設計和應變片的選擇、粘貼與防護;熱特性傳感器的前端設計——熱探針,包括加熱器設計、探針護套設計和溫度測量元件選擇;嵌入式系統(tǒng),主要包括數(shù)據(jù)采集電路、主控電路和基于μC/OS-Ⅱ的多任務管理系統(tǒng)。其次,改進常用的數(shù)字濾波算法,設計了動態(tài)限幅均值濾波的數(shù)字濾波器,以適用于本文的溫度數(shù)據(jù)和硬度數(shù)據(jù),并用Matlab仿真驗證了該濾波器可行性;然后通過采集到的應變片輸出數(shù)據(jù)轉化得到硬度數(shù)據(jù),改進用于熱特性反演粒子群優(yōu)化算法以提高算法的效率和適用性,并仿真驗證其可行性。最后,對設計好的傳感器軟硬件模塊進行了單獨校正和整體標定,并通過實驗給出了模擬月壤的硬度傳感器測量數(shù)據(jù)和熱特性反演結果。
[Abstract]:The temperature and thermophysical parameters of the lunar surface are two main contents of the lunar surface thermal environment. They are the basic boundary conditions for the study of the lunar interior thermal evolution model and the necessary parameters for the interpretation of microwave data. Scientifically speaking, obtaining real and reliable thermal physical parameters of lunar surface can make our country master more accurate, reliable and complete data of thermal environmental characteristics of lunar surface, and fill in the blank of knowledge of thermal environmental characteristics of lunar surface in our country. From the point of view of engineering application, the thermal control design based on simple and rough thermal environmental parameters will be difficult to meet the needs of lunar surface activities. Detailed and accurate data on the thermal properties of the lunar surface must be obtained further. Lunar soil hardness refers to the resistance of the soil to these external forces when the dynamic and dynamic loads of the lunar surface detection machinery are transferred to the soil. Therefore, the measurement of soil properties is an essential theoretical basis for lunar surface detection and even future base construction. In this paper, the measuring principle of soil hardness on the ground is studied, and the representative cone index is chosen as the parameter to measure the hardness of the simulated lunar soil and to guide the design of the sensor for simulating the hardness of the lunar soil. The principle of soil thermal characteristic measurement was studied and the principle of thermal probe which was suitable for the measurement of thermal characteristics of powdered materials was selected to guide the design of sensor for simulating lunar soil thermal characteristics. Then, under the guidance of the above measurement theory, the research and design of the front end structure of hardness sensor and thermal characteristic measuring sensor, and the design of embedded software and hardware system are carried out. Hardness probe design, including elastomer design and strain gauge selection, adhesion and protection; front end design of thermal characteristic sensor-thermal probe design, including heater design, probe sheath design and temperature measurement element selection; embedded system, It mainly includes data acquisition circuit, main control circuit and multitask management system based on 渭 C / OS- 鈪，

本文編號：1983718