Method for monitoring reactor control rod drive mechanism coil current rising edge vibration

• Main Authors: HE PAN, ZENG JIE, LUO TING, LIU CAIXUE, PENG CUIYUN, YANG TAIBO
• Format: Patent
• Language: Chinese; English
• Published: 12.10.2018
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The present invention discloses a method for monitoring reactor control rod drive mechanism coil current rising edge vibration. The method comprises the following steps of: arranging an independent Hall sensor on a drive mechanism control device, and collecting operation current signals of three coils of a CRDM; performing preprocessing of the current signals operated on the CRDM and converting the current signals to voltage signals; performing transformation, filtering and current segmentation processing to extract current rising section data of each section; in the current rising process, extracting the extreme value of each current rising section array, and establishing a current rising extreme value array, wherein each current rising extreme value array comprises one maximum value or one minimal value; determining whether each current rising extreme value array generates rising edge vibration or not; and recording the number of times of vibration in the current rising process, andperforming alarm when the