2results about How to "Eliminate signal interference" patented technology

The application discloses an ultrasonic film detection method, an ultrasonic fingerprint device and electronic equipment. The method comprises the following steps: obtaining N original echo time domain data with the same sampling duration, each original echo time domain data comprising a plurality of original amplitudes, and the sampling intervals of any two adjacent original amplitudes being the same; performing fusion processing on the N original echo time domain data to determine target echo time domain data, wherein the target echo time domain data comprises a plurality of target amplitudes, and each target amplitude is determined based on N original amplitudes with the same time sequence; performing feature extraction on the target echo time domain data to determine measured features corresponding to one or more film detection indexes; and determining a film detection result based on the measured features corresponding to the one or more film detection indexes. The ultrasonic film detection method can effectively eliminate hardware jitter, increase the signal strength of the echo time domain signal, and further improve the accuracy of film detection.

This utility model provides an engine speed signal isolation and branching module, belonging to the field of engine testing technology. This module solves the problems of signal interference and signal degradation when testing engine speed, phase, and other signals. The module's signal input unit connects the sensor signal terminal to the input terminal of the signal isolation unit. The output terminal of the signal isolation unit connects to the input terminals of the signal inverting unit and the signal output unit. The output terminal of the signal inverting unit connects to the input terminal of the signal output unit, and the output terminal of the signal output unit connects to the input terminal of the testing equipment. The isolation power supply unit converts the sensor power supply into an isolated power supply output. This module has the function of isolating and branching the speed sensor output signal, eliminating signal interference, preventing signal degradation, and simultaneously outputting in-phase and in-phase signals. The module uses a multiplexing method internally for high reliability, and adopts a non-destructive connection method to avoid damaging the wiring harness, thus improving work efficiency.