Patent ID: 8160826

Claim:
A method for estimating use time of electric appliances, comprising: obtaining a value-time curve of at least one electric characteristic on a loop; obtaining a plurality of candidate event time points according to a fluctuation range of the value-time curve; dividing a plurality of candidate time intervals according to a proximity degree of the candidate event time points; obtaining a plurality of explicit event time points corresponding to the candidate time intervals; calculating statistics values of the at least one electric characteristic in two time intervals formed by every three adjacent explicit event time points in all of the explicit event time points according to the value-time curve, so as to define a characteristic value of a middle explicit event time point in the three adjacent explicit event time points; pairing the explicit event time points to generate a plurality of candidate pair sets; summing differences of the characteristic values of the explicit event time points which are paired in each of the candidate pair sets to serve as an appropriate degree of selection of the candidate pair set; and selecting a target pair set according to the appropriate degree of selection of each of the candidate pair sets, so as to calculate the use time of the electric appliances on the loop.