Abstract: Disclosed are a dynamic error measurement apparatus, system, and method for an electricity meter. The measurement apparatus includes a test signal generation unit configured to generate a voltage test signal and two-circuit current test signals, output the voltage test signal to a measurement unit, and output the two-circuit current test signals to the measurement unit and a current summation unit; the measurement unit configured to determine two-circuit electric energy values based on the voltage test signal and the two-circuit current test signals, and output the two-circuit electric energy values to a calculation control unit; the current summation unit configured to determine a combined current signal based on the two-circuit current test signals; and the calculation control unit configured to determine a total electric energy value based on the two-circuit electric energy values. The system includes a standard meter and a measurement apparatus.

Abstract: The present application discloses paint based on a graphene nano container and a self-repairing coating as well as a preparation method and application thereof. The paint comprises a first component comprising 20˜40 parts by weight of epoxy resin; a second component comprising 0.1˜2 parts by weight of corrosion inhibitor-loaded graphene nano container, 1 part by weight of diluent, 30˜60 parts by weight of epoxy curing agent, 1 part by weight of defoaming agent and 1 part by weight of flatting agent, wherein the corrosion inhibitor-loaded graphene nano container comprises graphene grafted with cyclodextrin and the corrosion inhibitor reversely binding to the cyclodextrin. The paint of the present application is simple in preparation process, green and environmental friendly in raw material, low in price and available, and meanwhile the self-repairing coating formed thereof is excellent in protection performance.