Sensor device for monitoring transient voltage of broadband integral type power grid

The invention relates to a sensor device for monitoring the transient voltage of a broadband integral type power grid, which is characterized in that the sensor device is connected with a sensor (1), a grounded resistor (2), a voltage follower (3), an integral circuit (4), an opposite-phase amplifying circuit (5), a filter circuit (6), an over-voltage protecting circuit (7) and an impedance matching circuit (8) connected in sequence to form a signal circuit (9); the signal circuit (9) is connected with a PCI (Peripheral Component Interconnect) capture card through a transmission cable (11); the filter circuit (6) is connected with the PCI capture card through a transmission cable (11); the filter circuit (6) is connected with the PCI capture card through a transmission cable (12) after through a triggering circuit (10); the sensor (1) is a high-frequency current magnet balance Hall sensor, wherein the frequency band trait thereof is selected between DC and 500 kHz(-3dB), the load impedance thereof is selected between 50 and 160 omega, and the operating voltage thereof is DC12V. The design only comprises some electronic elements; the sensor device has the advantages of lower cost, smaller volume, and more convenience for spot installation without considering floor space.