Power failure detection system

• Main Authors: XU YINGNIAN, LI ZHAOHUI, TIE JINGHUA, ZOU ZHIYONG, LU SISI
• Format: Patent
• Language: Chinese; English
• Published: 04.12.2013
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The utility model belongs to the technical field of electric power equipment detection, and discloses a power failure detection system which comprises a voltage detection unit, a first comparator, a second comparator and a one-chip microcomputer. The input end of the voltage detection unit is connected with a power supply. The output end of the voltage detection unit is respectively connected with the first comparator and the second comparator. The output ends of the first comparator and the second comparator are connected with the one-chip microcomputer. Power supply voltage signals are acquired by the power failure detection system and then transmitted to the two comparators with different comparison values so that two comparison signals are obtained. Then a jump time difference of the two comparison signals is processed and calculated by the one-chip microcomputer so that whether power fails or not is judged. Therefore, the AC power failure detection is stably and rapidly completed.