Failure diagnostic system and failure diagnostic method for work machine

Abstract

A failure of a component mounted on a work machine is easily identified. A controller acquires time-series data detected in a first period as first snapshot data, and acquires the time-series data detected in a second period after the first period as second snapshot data. A storage unit stores information in which a deviation of a physical quantity from a normal range in order to monitor an operation status of the component, and a failure of the component that is a cause of the deviation are associated with each other. The controller identifies the failure of the component based on the first snapshot data, the second snapshot data, and the information stored in the storage unit.

1 . A failure diagnostic system for a work machine, comprising:
 a component mounted on a work machine;   a detection unit that detects a predetermined physical quantity in order to monitor an operation status of the component;   a controller that acquires time-series data of the physical quantity detected in a predetermined period as snapshot data and determines whether or not the physical quantity detected by the detection unit is in a normal range; and   a storage unit that stores information in which a deviation of the physical quantity from the normal range and a failure of the component that is a cause of the deviation are associated with each other, wherein   the controller   acquires, as first snapshot data, the time-series data detected in a first period,   acquires, as second snapshot data, the time-series data detected in a second period after the first period, and   identifies the failure of the component based on the first snapshot data, the second snapshot data, and the information stored in the storage unit.   
     
     
         2 . The failure diagnostic system for a work machine according to  claim 1 , wherein the controller
 generates an instruction signal for operating the work machine, and   acquires time-series data of the physical quantity as the first snapshot data after the instruction signal is generated, the time-series data being detected in the predetermined period going back from a time point when it is first determined that the physical quantity deviates from the normal range.   
     
     
         3 . The failure diagnostic system for a work machine according to  claim 1 , wherein the controller stores the first snapshot data in the storage unit. 
     
     
         4 . The failure diagnostic system for a work machine according to  claim 1 , wherein
 the information stored in the storage unit includes information in which the failure of the component and a countermeasure against the failure are associated with each other, and   the controller outputs the countermeasure against the failure identified based on the information stored in the storage unit.   
     
     
         5 . The failure diagnostic system for a work machine according to  claim 4 , wherein when there is a plurality of countermeasures against the failure, the controller gives priority to the countermeasures and outputs the countermeasures. 
     
     
         6 . A failure diagnostic method for a work machine, the work machine including a component, and a detection unit that detects a predetermined physical quantity in order to monitor an operation status of the component, wherein information in which a deviation of the physical quantity detected by the detection unit from a normal range and a failure of the component that is a cause of the deviation are associated with each other is stored in a storage unit, the failure diagnostic method including:
 acquiring, as first snapshot data, time-series data of the physical quantity detected in a first period;   acquiring, as second snapshot data, the time-series data of the physical quantity detected in a second period after the first period; and   identifying the failure of the component based on the first snapshot data, the second snapshot data, and the information stored in the storage unit.