Method for detecting estrus of cattle based on double-degree-of-freedom tail angle encoding
By introducing a phase anti-traction and energy redistribution mechanism into the triboelectric array, the resonance problem when the tail vibration frequency is close to the mechanical natural frequency is solved, realizing high-precision, low-drift monitoring of the estrus state of cows and ensuring the stability and accuracy of the detection results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANDONG AGRICULTURAL UNIVERSITY
- Filing Date
- 2026-05-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing self-powered angle sensing devices based on triboelectric effect are prone to local mechanical resonance when the tail vibration frequency is close to the mechanical natural frequency. This causes the signal processing unit to be unable to distinguish between the real tail rhythm and the false high-frequency events induced by resonance, resulting in seriously inaccurate estrus detection results.
By introducing a phase anti-traction and energy redistribution mechanism during the frequency domain energy evolution of the triboelectric array, local resonance caused by the vibration frequency approaching the mechanical natural frequency is avoided, the tail motion energy output is stabilized, and the continuity and reliability of the angle-coded signal are ensured.
It achieves high-precision, low-drift monitoring of estrus status in cows under complex environments, improves the long-term accuracy and stability of estrus detection, and avoids identification bias caused by resonance.
Smart Images
Figure CN122397642A_ABST