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在振动下模拟和测量应变波形,使用纤维布拉格格
Nurzhigit Smailov1, Sauletbek Koshkinbayev2, Bazarbay Aidana1
1Department of Electronics, Telecommunications and Space Technologies, Satbayev University, Almaty 050013, Kazakhstan.
Sensors (Basel, Switzerland)
|October 16, 2024
概括
使用纤维布拉格格的新方法可以测量高频振动或脉冲负载下的应变. 这些技术分析了随着时间的推移反射的光功率,以准确确定应变幅度和频率响应.
科学领域:
- 光学工程是指光学工程.
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
背景情况:
- 传统的应变测量方法面临着高频振动和脉冲机械作用的局限性.
- 纤维布拉格网格 (FBG) 提供了一个有前途的传感技术,但需要先进的信号处理来进行动态应变分析.
研究的目的:
- 开发和验证使用FBG在具有挑战性的动态条件下确定物体菌株的新方法.
- 为了使精确的应变测量跨范围广泛的大小和频率,克服现有技术的局限性.
主要方法:
- 从各种波长的FBG中数值处理时间依赖的反射光学功率.
- 使用常见的光纤组件,同时或连续地记录反射功率.
- 采用数值模拟和实验验证来验证方法.
主要成果:
- 已证明能够恢复对时间的应变依赖,长度可达±1000 μm及以上.
- 在高频振动和脉冲机械负荷下成功测量了应变参数.
- 对线性振动病例的实验验证,与数值模拟有很好的一致性.
结论:
- 拟议的方法提供了一种高效和准确的方法,用于使用FBG进行动态菌株监测.
- 这些技术适用于涉及高频振动和脉冲机械冲击的应用.
- 进一步讨论涉及实施这些方法的实际挑战和考虑.
相关概念视频
01:27Measurements of Strain
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Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
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01:15Design Example: Strain Gauge Bridge or Wheatstone Bridge
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The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
357