Device for detecting abnormality in construction machine

• Main Authors: FURUNO YOSHINORI, NISHIHATA JUN, SUZUKI HIDEAKI
• Format: Patent
• Language: English
• Published: 20.09.2012
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; CONTROLLING COMBUSTION ENGINES; DREDGING; FIXED CONSTRUCTIONS; FOUNDATIONS; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; HYDRAULIC ENGINEERING; LIGHTING; MEASURING; MECHANICAL ENGINEERING; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; REGULATING; SOIL SHIFTING; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR; WEAPONS

Provided is a device for detecting an abnormality in a construction machine, which can estimate an abnormality in mechanism parts such as an engine and a pump of a construction machine on the basis of the relationship among a plurality of pieces of sensor information, thereby preventing the machine from occurrence of any failure. From time-series sensor values obtained by a plurality of sensors (101), a correlation coefficient calculation unit (102) calculates respective correlation coefficients, a correlation coefficient comparison unit (103) compares the correlation coefficients and calculates the degree of the difference between the correlation coefficients, and when the calculated degree of the difference exceeds a predetermined value, an abnormality determination unit (104) determines that there is an abnormality in a part associated with the corresponding sensor.