Title locomotive electric circuit intelligent detector
Abstract
Bases on contemporary detection technique and fault diagnosis technique, this text emphases expounds development process of the locomotive electric circuit intelligent detector, integrating Railway Office practice develop locomotive fault diagnosis system.
At present, the locomotive detection equipment is devoid, consociate locomotive model and application condition of auto detection technique on the locomotive detection field, develop the locomotive electric circuit intelligent detector which is suited for most locomotives. The detector adopts pressure drop principium to measure micro-ohm. Electric circuit structure adopts four-circuit measuring method, eliminate connection evocative error. In respect of error treatment, adopts auto calibration technique, buck excursion error of system. To transition result, employ median filtering the waves to stochastic error of system. Ultimately the detector least resolving power reaches 1μΩ, error less than ±0.5%.
The detector nucleus is PIC16C74, usingSMC1602A, possess corresponding capability with PC. In order to satisfy different request, the detector uses setting threshold to diagnose locomotive circuit.
With original data that the locomotive electric circuit intelligent detector measured and fault diagnosis expert system handling mechanism, the system judged locomotive different state, proffers reference for locomotive service.