A method for detecting solid state relay and early aging and failure detecting means

A solid-state relay aging and early failure detection method, the steps of: a) applying an excitation signal to the solid state relay, A / D sampling circuit closing contact acquisition drop or drop off contact, the movable engagement pressure breaking fault drop or pressure drop movable engagement adhesive failure; 2) start a timer FPGA on the rising edge of the excitation signal, when the load current through the solid state relay, outputs the trigger signal, the timer is stopped when the trigger signal is detected; 3) decrease in the pulse signal start a timer in the FPGA, the level trigger circuit outputs trigger signal, the timer is stopped when the trigger signal is detected FPGA;. 4) storing the collected data to an external memory circuit, the display shows the results, the detection means comprises a FPGA, stimulus output circuit, load power, load box, the contact status indicator circuit, a sampling divider circuit, a level trigger circuit, A / D sampling circuit, external data storage circuit, an industrial control computer, a fault alarm detection is simple, rapid, accurate, automatic aging detection.