Power grid frequency detection circuit and method, storage medium and processor

• Main Authors: LIU KEQIN, LOU HEWEI
• Format: Patent
• Language: Chinese; English
• Published: 16.01.2018
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The present invention discloses a power grid frequency detection circuit and method, a storage medium and a processor, wherein the circuit comprises an active filtering circuit which is used for filtering the interference noise of a voltage sampling signal and of which the input end is connected with the output end of a power grid and is used for receiving the voltage sampling signal of the powergrid; a comparator circuit which is used for comparing the voltage sampling signal outputted by the active filtering circuit with a reference voltage and of which the input end is connected with the output end of the active filtering circuit; a controller connected with the output end of the comparator circuit and used for calculating the frequency of the power grid according to a signal outputtedby the comparator circuit. According to the present invention, the technical problem that the power grid frequency detection precision is lower, is solved. 本发明公开了种电网频率检测电路、方法、存储介质和处理器。其中，该电路包括：有源滤波电路，输入端与电网的输出端相连接，有源滤波电路的输入端用