基于应变计的动静态应力同步测量方法
By using pseudo-alternating sequence processing and temperature sequence constraints, the problem of unstable time correspondence in the separation and reconstruction of mixed signals of strain gauges was solved, realizing synchronous measurement of dynamic and static stress of strain gauges and reducing time window boundary distortion and temperature drift.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 湖南鑫园科技有限公司
- Filing Date
- 2026-06-17
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to effectively separate and reconstruct mixed strain signals from static stress, dynamic vibration, and temperature-related drift during long-term online monitoring of strain gauges, resulting in low-frequency base value entrainment, residual thermal drift, and unstable time correspondence.
A look-ahead extension sequence is generated by the tail envelope tendency of the pseudo-alternating sequence. A bidirectional time-inverse filter is performed by combining the main frequency of the tested entity structure. The look-ahead extension sequence is then pruned to obtain a zero-phase-shift alternating sequence. The temperature sequence is then input into the hysteresis constraint state-space model to separate thermal drift and mechanical creep, and output a synchronous stress sequence.
It reduces time window boundary distortion, suppresses group delay misalignment and temperature drift, and enables synchronous measurement of dynamic and static stress, ensuring the accuracy and stability of time correspondence.
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Abstract
Citation Information
Patent Citations
Predictive zero phase filtering
US11740268B2