Diagnosis support system for work machine, failure diagnosis system for work machine, diagnosis support method for work machine, and failure diagnosis method for work machine

1 . A diagnosis support system for a work machine, the diagnosis support system comprising:

a display apparatus; and

a controller having a memory that stores a table indicating a correspondence relationship between diagnosed portions and a plurality of sensor connection positions, wherein

the controller specifies a diagnosed portion in the work machine based on candidate information of an abnormality candidate in the work machine, refers to the table, specifies, from among the plurality of sensor connection positions, a first sensor connection position of a diagnosis sensor for diagnosis of the diagnosed portion based on the diagnosed portion, and controls the display apparatus to display position information of the first sensor connection position, and

the abnormality candidate being a potential cause for an abnormality detected in an operating characteristic of the work machine.

2 . The diagnosis support system for a work machine according to claim 1 , wherein the controller controls the display apparatus to display information on a work procedure for connecting the diagnosis sensor to the first sensor connection position.

3 . The diagnosis support system for a work machine according to claim 1 , further comprising:

a monitoring sensor connected to a second sensor connection position of the work machine, wherein

the controller determines whether or not the first sensor connection position is different from the second sensor connection position.

4 . The diagnosis support system for a work machine according to claim 3 , wherein when the controller has determined that the first sensor connection position is different from the second sensor connection position, the controller determines whether or not reconnection of the monitoring sensor from the second sensor connection position to the first sensor connection position is possible.

5 . The diagnosis support system for a work machine according to claim 4 , wherein when the controller has determined that reconnection of the monitoring sensor from the second sensor connection position to the first sensor connection position is possible, the controller controls the display apparatus to give an instruction on reconnection of the monitoring sensor from the second sensor connection position to the first sensor connection position.

6 . The diagnosis support system for a work machine according to claim 5 , wherein the controller recognizes the monitoring sensor as the diagnosis sensor connected to the first sensor connection position, based on a signal indicating that reconnection of the monitoring sensor from the second sensor connection position to the first sensor connection position is completed.

7 . A system for a work machine, the system comprising:

the diagnosis support system for a work machine according to claim 1 ; and

the diagnosis sensor connected to the first sensor connection position, wherein

the controller analyzes the operating characteristic of the work machine based on a detection signal from the diagnosis sensor.

8 . A diagnosis support method for a work machine having a display apparatus, the diagnosis support method comprising:

specifying a diagnosed portion in the work machine based on candidate information of an abnormality candidate in the work machine;

referring to a table, stored in a memory, that indicates a correspondence relationship between diagnosed portions and a plurality of sensor connection positions;

specifying, from among the plurality of sensor connection positions, a first sensor connection position of a diagnosis sensor for diagnosis of the diagnosed portion based on the diagnosed portion; and

controlling the display apparatus to display position information of the first sensor connection position,

wherein the abnormality candidate being a potential cause for an abnormality detected in an operating characteristic of the work machine.

9 . A failure diagnosis method for a work machine, the failure diagnosis method comprising:

analyzing, after the diagnosis support method for a work machine according to claim 8 , the operating characteristic of the work machine based on a detection signal from the diagnosis sensor connected to the first sensor connection position.