A time grating angular displacement sensor and a mixed frequency modulation measurement system and method thereof
By designing a multi-layer induction coil for an electromagnetic induction angular displacement sensor and implementing a frequency modulation measurement system, the signal drift and interference problems of capacitive grating sensors in humid and strong electromagnetic field environments were solved, thereby improving signal stability and anti-interference capabilities.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GENERTEC GUOCE TIME GRATING TECH CO LTD
- Filing Date
- 2026-04-21
- Publication Date
- 2026-07-17
AI Technical Summary
Capacitive angular displacement sensors experience signal drift in humid environments and are susceptible to interference from strong industrial electromagnetic fields, leading to signal failure or instability.
An electromagnetic induction-type angular displacement sensor is adopted, with a multi-layer structure for the induction coil. Combined with an alternating magnetic field and a frequency mixing modulation measurement system, the angle information is transferred from a high-frequency signal to a low-frequency signal for measurement, thereby enhancing the anti-electromagnetic interference capability and data stability.
Maintaining signal stability in environments with oil, dust, humidity, and strong electromagnetic fields improves the sensor's anti-interference capability and data stability, and solves the signal drift and interference problems of capacitive grating sensors.
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Figure CN122408596A_ABST