Work machine monitoring system and work machine monitoring method

Abstract

A work machine monitoring system includes a measurement data acquisition unit that acquires measurement data of working equipment included in the work machine at a predetermined sampling rate, a defect determination unit that determines presence or absence of a defect in the working equipment in the measurement data, a counting unit that counts the number of defect determination samples indicating the measurement data determined to have the defect, and a warning control unit that changes a warning pattern output from an output device based on the number of defect determination samples.

1 . A monitoring system for a work machine, comprising:
 a measurement data acquisition unit configured to acquire measurement data of working equipment included in the work machine at a predetermined sampling rate;   a defect determination unit configured to determine, in the measurement data, presence or absence of a defect in the working equipment;   a counting unit configured to count a number of defect determination samples indicating the measurement data in which it is determined to have the defect; and   a warning control unit configured to change a pattern of a warning output from an output device based on the number of defect determination samples.   
     
     
         2 . The monitoring system for the work machine according to  claim 1 , wherein
 the warning control unit outputs the warning in a first pattern from the output device when the number of defect determination samples is less than a sample threshold, and outputs the warning in a second pattern from the output device when the number of defect determination samples is equal to or greater than the sample threshold.   
     
     
         3 . The monitoring system for the work machine according to  claim 1 , wherein
 the warning control unit outputs the warning in a first pattern from the output device when the measurement data acquisition unit consecutively acquires pieces of the measurement data each being determined as the defect determination sample for a number less than the sample threshold, and outputs the warning in a second pattern from the output device when the measurement data acquisition unit consecutively acquires pieces of the measurement data each being determined as the defect determination sample for a number equal to or greater than the sample threshold.   
     
     
         4 . The monitoring system for the work machine according to  claim 2 , wherein
 the output device includes a sound generator that generates a warning sound,   the pattern of the warning includes a volume of the warning sound,   the warning output in the first pattern includes generation of the warning sound in a first volume from the sound generator, and   the warning output in the second pattern includes generation of the warning sound in a second volume from the sound generator, the second volume being larger than the first volume.   
     
     
         5 . The monitoring system for the work machine according to  claim 1 , wherein
 the working equipment includes a bucket body and a replacement member attached to the bucket body, and   the defect includes a defect in the replacement member.   
     
     
         6 . The monitoring system for the work machine according to  claim 5 , wherein
 the defect includes detachment of the replacement member from the bucket body.   
     
     
         7 . The monitoring system for the work machine according to  claim 5 , wherein
 the replacement member includes a tooth of a bucket.   
     
     
         8 . The monitoring system for the work machine according to  claim 5 , wherein
 the replacement member is attached to the bucket body so as to protrude from the bucket body, and   the defect determination unit determines that the defect exists when a protruding length of the replacement member is less than a dimension threshold.   
     
     
         9 . The monitoring system for the work machine according to  claim 8 , wherein
 a plurality of the replacement members is attached to the bucket body, and   the defect determination unit determines the dimension threshold based on the protruding length of each of the plurality of replacement members.   
     
     
         10 . The monitoring system for the work machine according to  claim 5 , wherein
 the output device includes a display device that displays a symbol indicating the replacement member, and   the warning control unit changes a display pattern of the symbol based on the presence or absence of the defect in the replacement member.   
     
     
         11 . The monitoring system for the work machine according to  claim 10 , wherein
 a plurality of the replacement members is attached to the bucket body, and   the display device displays a plurality of the symbols based on a position of each of the plurality of replacement members.   
     
     
         12 . The monitoring system for the work machine according to  claim 11 , wherein
 the warning control unit displays a symbol indicating the replacement member determined to have the defect and a symbol indicating the replacement member determined to have no defect in different display patterns.   
     
     
         13 . The monitoring system for the work machine according to  claim 11 , wherein
 the work machine includes a measuring device that measures the working equipment, and   the measurement data acquisition unit acquires the measurement data from the measuring device.   
     
     
         14 . The monitoring system for the work machine according to  claim 13 , wherein
 the work machine includes a headlight and a housing that holds the headlight, and   the measuring device is disposed in the housing.   
     
     
         15 . The monitoring system for the work machine according to  claim 14 , wherein
 the measuring device is disposed outside the headlight in a vehicle width direction of the work machine.   
     
     
         16 . The monitoring system for the work machine according to  claim 14 , wherein
 the measuring device is disposed on each of a left side and a right side of a center of the work machine in a vehicle width direction of the work machine,   the measuring device on the left side measures a left part of the working equipment, and   the measuring device on the right side measures a right part of the working equipment.   
     
     
         17 . The monitoring system for the work machine according to  claim 13 , wherein
 the working equipment includes a bucket for excavating an excavation target,   the bucket performs a dumping operation to discharge an excavated object held in the bucket, and   the measuring device measures at least the bucket performing the dumping operation.   
     
     
         18 . The monitoring system for the work machine according to  claim 17 , wherein
 the working equipment includes a boom that connects a vehicle body of the work machine and the bucket,   the bucket performs the dumping operation to discharge the excavated object to a dump body of a dump truck in a state that the boom is raised, and   the measuring device measures the bucket performing the dumping operation to discharge the excavated object to the dump body.   
     
     
         19 . The monitoring system for the work machine according to  claim 13 , wherein
 the measuring device includes an imaging device, and   the measurement data includes image data of the working equipment.   
     
     
         20 . A method for monitoring a work machine, comprising:
 acquiring measurement data of working equipment included in the work machine at a predetermined sampling rate;   determining, in the measurement data, presence or absence of a defect in the working equipment;   counting a number of defect determination samples indicating the measurement data in which it is determined to have the defect; and   changing a pattern of a warning output from an output device based on the number of defect determination samples.