Patent ID: 7050893

Claim:
A method of detection of the actual operating time of machinery characterized by being applied to a system including: machinery each provided with a storage unit, a control unit receiving as input a quantitative machine status for work operations, and a first communications device enabling communication with an outside unit present at a distant location and deployed at a construction site; a base station provided with a second communications device enabling communication with an outside unit present at a distant location, a center server for identifying a serial number of machinery and transferring information with said control unit, and a database managed by said center server and storing information for each model of said machinery and information relating to the operation for each machinery; wherein said control unit of said machinery and said center server of said base station are configured to be able to transfer information with each other through said communications devices and a communication line; wherein said control unit measures the duration where a quantitative machine status satisfies predetermined conditions corresponding to actual operations and stores it in the storage unit and transmits the measurement data of said duration to said center server of said base station; said center server receives the measurement data of said duration and calculates the actual operating time of the machinery; said center server calculates a cumulative operating time for each serial number of said machinery; and said center server calculates a cumulative operating time for each part for each serial number of said machinery, performs statistical processing on said cumulative operating times of said large number of machinery to find an average cumulative operating time, and transmits replacement time information for each part to each of said large number of machinery.