一个级联的Nitinol Langevin传感器,以在高温下保持共振稳定
Yuchen Liu1, Mahshid Hafezi1, Andrew Feeney1
1Centre for Medical and Industrial Ultrasonics, University of Glasgow, James Watt School of Engineering, Glasgow, G12 8QQ, United Kingdom.
Ultrasonics
|November 17, 2023
概括
压电超声波传感器通常会因热而降解. 在Langevin传感器中加入Nitinol,一种形状记忆合金,通过补偿温度引起的材料软化来稳定性能,从而提高设备的可靠性.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 声学 声学 在声学方面
背景情况:
- 压电超声波传感器由于温度敏感性而遭受性能降低.
- 高激发电压和环境因素诱导非线性行为,损害设备的功能.
- 目前的方法,如脉冲信号,对于合适的压电材料有局限性.
研究的目的:
- 为了减轻压电超声波传感器中温度诱导的降解.
- 为了研究尼丁醇在级联的兰格温变频器配置中的使用.
- 为了使传感器在高刺激水平的动态反应线性化.
主要方法:
- 设计和描述了两个Langevin传感器配置:一个是Nitinol中质量,另一个是.
- 采用了电气和热力学表征技术.
- 控制的尼丁醇微结构,以评估其对压电堆软化的影响.
主要成果:
- 与混合相相相比,Nitinol-middle级联式传感器表现出与奥氏体Nitinol相比更高,更稳定的振动幅度.
- 传感器性能在20°C至45°C的温度范围内保持稳定,独立于激发电压.
- 自热实验证实了在连续运行期间,尼醇中介传感器的共振稳定性.
结论:
- 尼丁醇的非线性硬化反应可以动态补偿压电材料的软化.
- 控制尼丁醇微结构是缓解压电堆非线性软化的关键.
- 尼丁醇中间级联传感器在功率超声波应用中表现出增强的稳定性和可靠性.
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