The invention discloses a circuit board
health condition monitoring method based on
volt-
ampere characteristic curves. The method includes: data completeness can be guaranteed while a representing method of a
digital image is applied to a
volt-
ampere characteristic curve between any two points on a circuit board for storage, and node grouping curves serve as characteristic information of the circuit board in a manner of a circuit gray graph.
Voltage and current data in the
volt-
ampere characteristic curves are subjected to per unit
processing, all curves formed by element pins are classified according to nodes, the curves are respectively subjected to
aliasing according to the nodes, placement in each pixel region is summed up to be represented as gray, a set of all pixels forms the
digital image of characterization node inherent characteristic, and correlation of the circuit gray graphs of the nodes under different statuses is determined to judge
health condition of the circuit board. By the circuit board
health condition monitoring method, conversion and compression of
mass data are achieved, storage scale of the data is downsized greatly, and speed, efficiency and accuracy of monitoring the circuit board health condition are increased.