Spectral/Fourier Analysis TRIZ Cases

See how a vacuum station reuses its ZCP circuit to detect AC overvoltage via pulse-width monito

See how a ZCP circuit detects AC overvoltage by measuring pulse width between zero crossings, d

See how asymmetric negative charge distribution toward the surface improves dust collection whi

EIS-based impedance monitoring detects secondary battery abnormalities during rest and constant-current operation where ECM estimation falls short.

Stray magnetic field spectra reveal inter-turn short circuit and dynamic eccentricity faults without healthy reference data or complex hardware.

By setting the positive electrode Rct/Rs ratio to 2 or more, EIS-based diagnosis helps curb low-temperature degradation in lithium secondary batteries.

Electrical current and voltage spectra reveal drivetrain vibration anomalies, cutting sensor deployment in hazardous areas and supporting preventive maintenance.

FFT analysis of existing power quality meter data detects sub-synchronous oscillations without extra sensors, enabling lower-cost mitigation.

Frequency analysis of field current or rectified voltage detects excitation rectifier faults without extra sensors, reducing overload risk.

Periodic discharge voltage and current sampling with Fourier transform builds accurate battery impedance spectra without bulky electrochemical workstations.

Dynamic variable capacitance adjusts CAN noise cut-off frequency as controller count or communication frequency changes, avoiding capacitor replacement.

Comparing peak pairs in motor current spectra at two load levels helps isolate rotor slot harmonics for speed estimation and fault diagnosis.