| 摘要 |
PROBLEM TO BE SOLVED: To measure an operation time of a machine body to be attached to/detached from a construction working machine. SOLUTION: The operating time measuring device 1 includes a detecting part 103 including an acceleration sensor, a sampling part 104, an arithmetic part 105, a storage part 108 and a power supply part 101 or the like. Each accelerationα<SB>x</SB>,α<SB>y</SB>,α<SB>z</SB>sent from the acceleration sensor, corresponding to an x-direction, a y-direction and a z-direction is extracted from the sampling part 104 at predetermined time intervals. The arithmetic part 105 calculates the accelerationα, and calculates the operation time based on an operation detection signal S to be sent when the value is larger than a threshold value set with a threshold setting part 106. The calculated result is held in the storage part 108. COPYRIGHT: (C)2011,JPO&INPIT
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