本文選題：磁彈性傳感器 + 共振頻率��； 參考：《太原理工大學》2015年博士論文

【摘要】：磁彈性傳感器具有高靈敏度、低成本和非接觸測量等諸多優(yōu)勢而備受關注,因此在無損檢測、生物活體檢測、食品安全和環(huán)境監(jiān)測等領域具有巨大的應用前景。本文主要通過實驗對磁彈性材料的共振特性進行研究,將磁彈性傳感器應用于液體粘度測量和重金屬離子檢測,并研制了便攜式磁彈性傳感器共振頻率測量裝置。論文的主要內(nèi)容和結(jié)論如下：1)搭建了磁彈性材料共振頻率測量平臺,利用該平臺研究了三種磁彈性材料(METGLAS 2826MB、1K107和107K)的共振特性、共振模態(tài)、以及直流偏置磁場、交變激勵磁場、退火處理、材料長度和掃描點數(shù)等可變參數(shù)對磁彈性材料共振特性的影響。研究發(fā)現(xiàn)：三種磁彈性材料都具有多個共振頻率。METGLAS 2826MB在30kHz-280kHz范圍具有五個幅值較大的共振峰。低階(n=1～4)共振峰的共振頻率和半高寬度基本成線性分布,而高階(n=5)則出現(xiàn)非線性變化。直流偏置磁場的方向和大小影響METGLAS 2826MB材料的共振模態(tài)。優(yōu)化交流偏置磁場可提高共振曲線的平滑度,避免產(chǎn)生毛刺和分叉,從而提高共振頻率的準確性。提高質(zhì)量負載的均勻度則可避免磁彈性傳感器的錯誤響應。2)研究了液體粘度對METGLAS 2826MB材料的共振特性的影響,并將nMETGLAS 2826MB材料用于人體血液粘度的測量。通過對比不同共振模態(tài)下METGLAS 2826MB材料的共振頻率對液體粘度的響應,高頻率的共振模態(tài)具有更高的靈敏度。3)提出了一種基于Metglas 2826MB材料的置換反應快速檢測液體中重金屬離子的方法。該方法利用低成本的磁彈性材料,無需任何表面功能化修飾,直接與待測重金屬離子溶液接觸。通過實驗發(fā)現(xiàn)：METGLAS 2826MB材料可以與硝酸鉛或者硫酸銅溶液發(fā)生反應。材料表面鐵的含量隨著時間不斷減少,而鉛則不斷增加。被置換出來的鉛或銅均勻地附著在磁彈性材料表面。METGLAS 2826MB材料的共振頻率偏移量隨著測試溶液濃度的增加而變大。對于濃度為5mg/ml～25mg/ml的硝酸鉛溶液,6mmx3mm×30μm的METGLAS 2826MB材料在150分鐘后的共振頻率偏移量呈線性變化。4)研制了磁彈性傳感器共振頻率測量便攜式裝置。通過實驗結(jié)果對比分選,驗證了樣機的可行性。
[Abstract]:Magnetoelastic sensors have attracted much attention due to their advantages of high sensitivity, low cost and non-contact measurement, so they have great application prospects in the fields of nondestructive testing, biological in vivo detection, food safety and environmental monitoring and so on. In this paper, the resonance characteristics of magnetoelastic materials are studied through experiments. The magnetoelastic sensors are applied to the measurement of liquid viscosity and the detection of heavy metal ions, and a portable device for measuring resonance frequency of magnetoelastic sensors is developed. The main contents and conclusions are as follows: (1) A platform for measuring the resonance frequency of magnetoelastic materials is built. The resonance characteristics, resonant modes, DC bias magnetic field and alternating excitation magnetic field of three kinds of magnetoelastic materials (METGLAS 2826MB-1, 1K107 and 107K) are studied. The effects of annealing, material length and scanning number on the resonance characteristics of magnetoelastic materials. It is found that all three kinds of magnetoelastic materials have multiple resonance frequencies. METGLAS 2826MB has five resonance peaks with larger amplitude in the 30kHz-280kHz range. The resonance frequency and the half-height width of the resonance peak of the lower order are almost linearly distributed, while the higher order is characterized by the nonlinear variation of the resonance frequency and the half-height width of the resonance peak. The direction and magnitude of DC bias magnetic field affect the resonance mode of METGLAS 2826MB material. Optimizing AC bias magnetic field can improve the smoothness of resonance curve, avoid burr and bifurcation, and improve the accuracy of resonance frequency. The effect of liquid viscosity on the resonance characteristics of METGLAS 2826MB material was studied by increasing the uniformity of mass load. The error response of magnetoelastic sensor was avoided. The nMETGLAS 2826MB material was used to measure the blood viscosity of human body. By comparing the response of resonance frequency of METGLAS 2826MB material to liquid viscosity in different resonant modes, The high frequency resonance mode has higher sensitivity. 3) A new method for rapid detection of heavy metal ions in liquid by displacement reaction based on Metglas 2826MB material is proposed. The method uses low cost magnetoelastic materials without any surface functionalization and is directly in contact with the solution of heavy metal ions to be measured. It is found that the reaction of 2826MB with lead nitrate or cupric sulfate solution can be carried out. The content of iron on the surface of the material decreases with time, while the content of lead increases. The displacement of lead or copper onto the surface of the magnetoelastic material. METGLAS 2826MB increases with the increase of the concentration of the measured solution. A portable magnetoelastic sensor resonant frequency measurement device has been developed for METGLAS 2826MB material with concentration of 5mg/ml~25mg/ml (6mm x 3mm 脳 30 渭 m) with a linear variation of resonance frequency deviation after 150 minutes. The feasibility of the prototype is verified by comparing and sorting the experimental results.
【學位授予單位】：太原理工大學
【學位級別】：博士
【學位授予年份】：2015
【分類號】：TP212

【相似文獻】

相關期刊論文 前2條

1 易大斌;;磁彈性傳感器[J];工業(yè)儀表與自動化裝置;1980年01期

2 ;[J];;年期

相關博士學位論文 前1條

1 程鵬;磁彈性材料共振特性研究以及在液體粘度和重金屬離子檢測的應用[D];太原理工大學;2015年

相關碩士學位論文 前1條

1 馮桂蘭;智能化轉(zhuǎn)矩測量系統(tǒng)的研制[D];西安理工大學;2003年

，

本文編號：1991836