FZC-TDE:低采样速率实时超声波应力测量算法
Feifei Qiu1, Bing Chen1, Chunlang Luo1
1School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
Micromachines
|December 31, 2025
概括
一个新的频域零填充交叉相关时间延迟估计 (FZC-TDE) 算法可以在低采样速率下精确的超声波应力测量. 这种方法可以降低微纳米处理设备的功耗和硬件成本.
科学领域:
- 材料科学与工程 材料科学与工程
- 机械工程 机械工程
- 信号处理 信号处理
背景情况:
- 微纳米大小的加工设备要求高精度,使残余应力测量对稳定性至关重要.
- 传统的超声波应力测量需要高的采样率,导致功耗增加和硬件费用增加.
- 现有的方法在资源有限的环境中努力平衡准确性和效率.
研究的目的:
- 引入一种用于超声波应力测量的新型低采样率方法.
- 开发和验证频域零填充交叉相关时间延迟估计 (FZC-TDE) 算法.
- 为了降低精密测量应用中的硬件成本和功耗.
主要方法:
- 开发频域零补丁交叉相关时间延迟估计 (FZC-TDE) 算法.
- 使用频域融合操作 (零填充插值和交叉相关) 进行高分辨率延迟测量.
- 进行拉伸力验证实验,以确定最低采样率要求,并与时间域插值方法进行比较.
主要成果:
- 在低采样率下,FZC-TDE能够有效地进行时间延迟变异的表征 (例如,在25 MSps以下,插值是不够的).
- 至少需要20倍信号频率的采样率,以达到±10 MPa的精度.
- 与时间域插值方法相比,FZC-TDE表现出更高的计算效率,显著减少了算术操作和稳定的计算时间.
结论:
- FZC-TDE算法在可接受的应力测量精度和增强的计算效率之间提供了最佳的平衡.
- 这种方法显著减少了采样率的限制,使其成为实时和资源有限的应用程序的理想选择.
- 通过降低硬件需求,FZC-TDE算法支持微纳米尺寸处理设备和设备性能的进步.
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