ANTI-INTERFERENCE PROCESSING METHOD DURING DETECTION OF CP SIGNALS BY VEHICLE-MOUNTED CHARGER

摘要

An anti-interference processing method during detection of CP signals by vehicle-mounted charger, comprising the following steps: step 1, capturing CP signals; step 2, determining whether the CP signals satisfy a preset pulse width, and reserving qualified CP signals satisfying the preset pulse width; step 3, performing amplitude limiting on the frequencies of the qualified CP signals; step 4, performing average filtering on the amplitude-limited frequencies to obtain smooth sampling frequency values; step 5, performing low-pass filtering on the smooth sampling frequency values; step 6, determining whether the frequency values of the CP signals satisfy Chinese standard requirements, if not, ending the capture, and if yes, calculating a duty cycle so as to continue to perform the next step; and step 7, performing low-pass filtering on the calculated duty cycle to obtain a final CP signal, and ending the capture. By means of the method, a stable CP signal can still be detected while CP signals are severely interfered.