共查询到19条相似文献,搜索用时 48 毫秒
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介绍了一种新型高灵敏度巨磁电阻式传感器的工作原理和使用方法,并利用它测量了钢片的杨氏模量。实验结果表明:用该巨磁电阻式传感器测量杨氏模量,测量方法实用性强,精确度较高。 相似文献
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磁致伸缩传感器测量信号滤波方法探讨 总被引:5,自引:0,他引:5
本文在分析了磁致伸缩传感器的输出信号特性的基础上,提出了基于测量信息特征值提取的平滑滤波的数字滤波方法。实验证明,本方法真有算法简洁、实用、测量精度高、动态特性好的特点。 相似文献
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磁致伸缩移传感器的技术与创新 总被引:10,自引:0,他引:10
《传感器世界》1997,3(11):15-29
Temposonics磁致伸缩位移传感器的技术早于70年代被开发和应用,传统上,此种位移传感器一般应用在机械自动化过程中,如注塑机、油压缸、林木加工、钢铁厂以及地下及地面油库储存、工业流程、生化、石化、食品加工、污水处理等,它不但性能高,精度高,而且安装简易,可靠程度高,更能随高冲击和振荡,而无需定期维修或标定。美国MTS公司拥有磁位移传感器原来的设计专利权,本文资料由该公司专门提供,结合该公司产 相似文献
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磁致伸缩液位传感器信号拾取关键技术的研究 总被引:7,自引:0,他引:7
简单介绍了磁致伸缩液位传感器的测量机理,分析了回波信号的产生和拾取的原理,并对回波拾取机构所涉及的关键技术进行了详细的论述. 相似文献
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由于航空工业的特殊性,对于一些外部供应商提供的飞机零部件,其具体的力学性能无法获取,这就对其地面和飞行试验中的应变和载荷监测结果的准确性校准造成困难.针对未知材料特性固体结构弹性模量的测量需求,本文提出了一种基于超声检测时迟到回波形成原理的测量方法,利用常用的超声纵波直探头对材料横波声速进行测量,并根据弹性模量、泊松比... 相似文献
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研制了一种新型的采用超声波传感器测量材料中超声波传播的速度和距离的实验装置。用该实验装置可测量超声波在固体、液体、气体中的传播速度,并可以探测水中物体、水深及工件体内部的缺陷,应用于医学还可以测量人体脏器的厚度、位置等。实验结果表明:一般不确定度小于3.0%。 相似文献
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Euan BoydAuthor Vitae Volker NockAuthor VitaeDominik WeilandAuthor Vitae Xudong LiAuthor VitaeDeepak UttamchandaniAuthor Vitae 《Sensors and actuators. A, Physical》2011,172(2):440-446
As microelectromechanical systems (MEMS) become more complex and is produced in even greater numbers it becomes increasingly important to have a full understanding of the mechanical properties of the commonly used MEMS materials. One of the most important properties for MEMS is the Young's modulus. This work describes the direct comparison of two methods often used for measuring the Young's modulus of thin film materials using micro-cantilever test structures: a load-deflection method and a resonant frequency method. The comparison was carried out for a range of materials, different cantilever geometries as well as for single and multilayer materials. It was found that both methods produce results that agree with each other and also agree with the values most often given in the literature. 相似文献
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Characterization of Young's modulus and residual stress gradient of MetalMUMPs electroplated nickel film 总被引:1,自引:0,他引:1
Metal multi-user MEMS processes (MetalMUMPs) offered by MEMSCAP provide a 20 μm thick electroplated nickel film suitable for constructing micro RF tunable capacitors, RF inductors, relays, switches, etc. Currently the Young's modulus and the residual stress gradient of the MetalMUMPs nickel film have not been characterized. In this paper the resonance method is used to characterize the Young's modulus of the MetalMUMPs nickel film. The characterization results show that the nickel film has a Young's modulus of 155–164 GPa with an average of 159 GPa. A stress gradient induced free beam mechanism is proposed in this paper to characterize the residual stress gradient in the MetalMUMPs nickel film. Characterization results show that the residual stress in the electroplated nickel film has a gradient across the film thickness of −5.49 MPa/μm to −4.30 MPa/μm with the average of −4.72 MPa/μm. The residual stress change from the bottom surface to the top surface of the nickel film is −97.7 MPa. The Young's modulus and residual stress gradient of the MetalMUMPs nickel film obtained in this paper provide MetalMUMPs users an important reference for designing, optimizing and analyzing suspended nickel structures. The stress gradient induced free beam mechanism proposed in this paper provides a method of characterizing negative residual stress gradient in thin films without using trenches or through-wafer holes. 相似文献
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A laser-scanning vibrometer can be used for measuring even the smallest motions of the active area of ultrasonic transducers. Additionally, a new method for measuring and visualising the acoustic sound waves, emitted from such transducers, is developed. The new method, too, is based on laser-scanning vibrometry and allows the contact-less measurement of ultrasound fields with high spatial resolution. The combination of both techniques permits to analyse and optimise the acoustic behaviour of ultrasonic transducers. Moreover, the method is qualified for investigating and presenting numerous acoustic phenomena. 相似文献