Diagnostic aid system for working machine, fault diagnosis system for working machine, diagnostic aid procedure for working machine, and fault diagnosis procedure for working machine

Abstract

Diagnostic aid system for a working machine (100), wherein the diagnostic aid system comprises: a display device (33); a controller (10) that specifies a diagnostic section in the working machine (100), based on candidate information about an abnormality candidate in the working machine (100), specifies a first sensor connection position of a diagnostic sensor (34) for diagnosis of the diagnostic section, and controls the display device (33) to display position information of the first sensor connection position; and a monitoring sensor (31) which is connected to a second sensor connection position of the working machine (100), wherein The controller (10) determines whether the first sensor connection position differs from the second sensor connection position, and If the controller (10) has determined that the first sensor connection position differs from the second sensor connection position, the controller (10) determines whether it is possible to reconnect the monitoring sensor (31) from the second sensor connection position to the first sensor connection position or not.

Description

[0001] The present disclosure relates to a diagnostic aid system for a working machine, a fault diagnosis system for a working machine, a diagnostic aid method for a working machine and a fault diagnosis method for a working machine.

[0002] A maintenance device for a machine is disclosed, for example, in JP 2006-350499A. This discloses the storage of image data showing the arrangement of components of a machine, and the generation and display of an image that specifies a component according to maintenance information in the image data. JP 2006-350499A describes a maintenance management system for machines that links 3D component data with determined maintenance information. The system generates and displays maintenance images with marked defect locations.

[0003] JP 2015-45145A describes a display device for an excavator that shows detected abnormalities along with associated pipe and component layout diagrams. Furthermore, diagnostic sequences and flowcharts can be displayed, and affected areas in the diagrams can be highlighted.

[0004] Traditionally, when an abnormality in the operating characteristics of a machine is perceived and detected, a maintenance person has to go to the site and measure the operating characteristics. However, in recent years, with the development of communication technologies, the transmission and reception of data with significantly high capacity has become possible. As a result, information about various operating characteristics of a machine can be obtained from a remote location.

[0005] However, in the case of a gearbox or similar device, for example, there are numerous points where measuring hydraulic pressure is desirable as an operational characteristic. Therefore, installing a diagnostic sensor for fault identification at each point where hydraulic pressure needs to be measured increases the number of components. In particular, for small and medium-sized mass-production models, it is cost-effective to install a large number of diagnostic sensors and equip each of them with a communication function.

[0006] One objective of the present disclosure is to provide a diagnostic aid system for a working machine, a fault diagnosis system for the working machine, a diagnostic aid procedure for the working machine, and a fault diagnosis procedure for the working machine, all of which enable a fault to be identified simply and accurately with a small number of components.

[0007] The problem according to the invention is solved by a diagnostic aid system with the features of claim 1 and a diagnostic aid method with the features of claim 7. The dependent claims describe advantageous embodiments.

[0008] According to the present disclosure, it is possible to realize a diagnostic aid system for a working machine, a fault diagnosis system for the working machine, a diagnostic aid procedure for the working machine, and a fault diagnosis procedure for the working machine, wherein with all of these a fault can be identified simply and accurately with a small number of components. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a perspective view that schematically represents a configuration of a working machine according to an embodiment of the present disclosure. Fig. 2 is a side view that shows the configuration of the Fig. 1 depicts the working machine shown. Fig. Figure 3 is a diagram that represents an example of a sensor connection position of a diagnostic sensor in fault diagnosis of the present disclosure, wherein in this diagram a hydraulic circuit of a power transmission device in Fig. 2 is shown. Fig. Figure 4 is a planar view representing a sensor connection position of a diagnostic sensor in the fault diagnosis of the present disclosure, wherein in this planar view a configuration of a transmission and a torque converter is shown. Fig. Figure 5 is a diagram that shows an example of a configuration of a fault diagnosis system for the working machine in Fig. 1 represents. Fig. Figure 6 is a diagram that shows an example of functional blocks in the diagnostic assistance system and a fault diagnosis system for the working machine in Fig. 1 represents. Fig. Figure 7 is a flowchart that illustrates an example of a diagnostic aid procedure for the working machine according to the present embodiment of the present disclosure. Fig. 8 is a flowchart that shows a processing step of the sensor extension determination in Fig. 7 represents. Fig. Figure 9 is a flowchart showing a processing step of the fault diagnosis after connecting the diagnostic sensor. DESCRIPTION OF A FORM OF EXECUTION

[0009] In the following, an embodiment of the present disclosure is described with reference to the drawings.

[0010] In the description and drawings, the same components or corresponding components are identified with the same reference numerals, and redundant descriptions are not repeated. In the drawings, a configuration may be omitted or simplified to simplify the description.

[0011] The present disclosure is applicable to a working machine such as a hydraulic excavator, a wheel loader, a bulldozer, a forklift, in addition to a motor grader. In the following description, “upper”, “lower”, “front”, “rear”, “left”, and “right” directions are based on a user seated in an operator seat 11S in an operator cabin 11 in Fig. 1 is seated. <Konfiguration der Arbeitsmaschine>

[0012] First, a configuration of a motor grader is described as an example of the working machine of the present embodiment with reference to Fig. 1 and Fig. 2 described.

[0013] Fig. 1 and Fig. Figure 2 is a perspective view and a side view, respectively, which schematically represent a configuration of the working machine according to the present embodiment of the present disclosure. As in Fig. Figure 1 shows a Motorgrader 100, the working machine that performs land grading and snow removal while driving.

[0014] Motorgrader 100 includes a front frame 14, a rear frame 15, a pair of articulated cylinders 28, operator's cab (11), an engine cover 13, front wheels 16 and rear wheels 17, and a working tool 12.

[0015] Front frame 14 and rear frame 15 form a vehicle body frame 18 of motor grader 100. Front frame 14 is arranged in front of rear frame 15.

[0016] The front frame 14 is rotatably connected to the rear frame 15 by a central bolt (not shown) located on an axis 121 of a pivot center. The axis 121 of the pivot center is an axis extending along a vertical direction.

[0017] The pair of articulated cylinders 28 are arranged transversely to the front frame 14 on both the left and right sides. The articulated cylinders 28 are hydraulic cylinders driven by hydraulic pressure to extend and retract. The front frame 14 rotates about axis 121 of the pivot point relative to the rear frame 15 by means of the extension and retraction drive of the articulated cylinders 28.

[0018] The front wheels 16 and rear wheels 17 are running wheels. The front wheels 16 are rotatably mounted on the front frame 14. The front wheels 16 are steering wheels and are mounted on the front frame 14 in a steerable manner. The rear wheels 17 are rotatably mounted on the rear frame 15. Driving force from the motor is transmitted to the rear wheels 17.

[0019] Working tool 12 is arranged between front wheels 16 and rear wheels 17 in a front / rear direction. Working tool 12 is held by front frame 14. Working tool 12 includes a cutting edge 21, a drawbar 22, a pivot circle 23, and a pair of lifting cylinders 25.

[0020] The drawbar 22 is arranged below the front frame 14. A front end of the drawbar 22 is pivotally connected to a far end of the front frame 14. The pair of lifting cylinders 25 are arranged on both the left and right sides of the front frame 14. A rear end of the drawbar 22 is held by the front frame 14 via the pair of lifting cylinders 25.

[0021] The rear end of the drawbar 22 can be moved up and down relative to the front frame 14 by extending and retracting the pair of lifting cylinders 25. When both pairs of lifting cylinders 25 are driven to retract, the height of the cutting edge 21 relative to the front frame 14 and front wheels 17 is adjusted upwards. When both pairs of lifting cylinders 25 are driven to extend, the height of the cutting edge 21 relative to the front frame 14 and front wheels 16 is adjusted downwards.

[0022] The drawbar 22 can be pivoted upwards and downwards about an axis along the front / rear direction by extending and retracting the pair of lifting cylinders 25 differently from each other.

[0023] The pivot circle 23 is located below the drawbar 22. The swivel circle 22 is rotatably connected to the drawbar 22. The swivel circle 23 can be rotated clockwise and counterclockwise about an axis along the vertical direction.

[0024] Cutting edge 21 is positioned below pivot circle 23. Cutting edge 21 is positioned so that it faces the ground. Cutting edge 21 is held by pivot circle 23. Cutting edge 21 rotates such that an angle (cutting angle) formed by cutting edge 21 with respect to the front / back direction in plan view changes in conjunction with a rotational movement of pivot circle 23. An axis of rotation of cutting edge 21 is an axis extending along the vertical direction.

[0025] As in Fig. As shown in Figure 2, operator cabin 11, for example, is located on the rear frame 15. Operator cabin 11 defines an interior space into which the user can enter. In operator cabin 11, an input device 32, a display device 33, a plurality of operating levers, and the like are arranged, in addition to the operator seat 11S. Operator cabin 11 can be located on the front frame 14.

[0026] Input device 32 is designed to allow the user to perform various input operations during fault diagnosis, for example. Input device 32 can be, for example, a switch, a button, a dial, a lever, a joystick, or the like, or it can be a device with which time can be entered.

[0027] Display device 33 contains a display unit and shows, for example, a fault diagnosis workflow on the display unit. The display unit can be, for example, a touch panel. In this case, when the user performs a touch operation on the touch panel, various input operations in the fault diagnosis are possible without being dependent on the operation of input device 32. In this case, display device 33 can serve as input device 32.

[0028] Engine cover 13 covers an engine compartment and is held by rear frame 15. The engine compartment contains a gearbox 13a, a torque converter 13b, an engine 13c, an exhaust aftertreatment structure (not shown), and the like. Gearbox 13a and torque converter 13b form a power transmission device and transmit power from engine 13c to rear wheels 17.

[0029] Gearbox 13a contains a hydraulic clutch and a speed-changing transmission. Gearbox 13a converts the rotational speed and torque of an input shaft connected to an output side of torque converter 13b. The converted rotational speed and torque are ultimately transmitted to rear wheels 17 from the output shaft of gearbox 13a via a final reduction gear and a tandem coupling. <Beispiel von Sensorverbindungsposition von Diagnosesensor in Fehlerdiagnose>

[0030] Next, an example of a sensor connection position of the diagnostic sensor in the fault diagnosis of Motorgrader 100 will be shown. Fig. 1 and Fig. 2 with reference to Fig. 3 and Fig. 4 described.

[0031] Fig. 3 is a diagram that represents an example of a sensor connection position of the diagnostic sensor in the fault diagnosis of the present disclosure, wherein in this diagram a hydraulic circuit of the power transmission device in Fig. 2 is shown. Fig. Figure 4 is a planar view representing a sensor connection position of the diagnostic sensor in the fault diagnosis of the present disclosure, wherein in this planar view a configuration of the transmission and the torque converter is shown.

[0032] As in Fig. Figure 3 shows the hydraulic circuit of the power transmission device, comprising gear unit 13a, torque converter 13b, and a linkage force control mechanism 45.

[0033] A line connected to a hydraulic pump 51 contains a line 52a and another line 52b branching off from each other. A hydraulic device for a shut-off mechanism of torque converter 13b is connected to one of the lines 52a.

[0034] The hydraulic device for a shut-off mechanism includes a shut-off valve 53, a shut-off solenoid valve 54, and a shut-off coupling mechanism 55. The shut-off solenoid valve 54 supplies a control pressure to the shut-off valve 53. The shut-off coupling mechanism 55 is connected between the shut-off valve 53 and the torque converter 13b.

[0035] Gearbox 13a is connected to the other line 52b via an oil filter 56 and a linkage force control mechanism 45. Gearbox 13a includes a direction-changing clutch mechanism 41 and a speed-changing clutch mechanism 42.

[0036] Direction-changing clutch mechanism 41 includes, for example, a forward low-speed (FL) clutch mechanism 41A, a forward high-speed (FH) clutch mechanism 41B, and a reverse (R) clutch mechanism 41C. Thus, direction-changing clutch mechanism 41 can change direction in three stages.

[0037] Speed-shift clutch mechanism 42 includes speed-changing clutch mechanisms 42A, 42B, 42C, and 42D corresponding to first through fourth gears. Thus, speed-shift clutch mechanism 42 can change the speed in four stages.

[0038] By coupling any of the direction-changing clutch mechanisms 41A to 41C and any of the speed-changing clutch mechanisms 42A to 42D, for example, speed positions of 8 forward stages and 4 reverse stages can be obtained.

[0039] The linkage force control mechanism 45 contains a plurality of electronic control valves 45A to 45G. The plurality of electronic control valves 45A to 45G are each connected to the plurality of coupling mechanisms 41A to 41C and 42A to 42D of transmission 13a.

[0040] During fault identification, it is preferable to measure the hydraulic pressure at each of sensor connection positions P1 to P9 by connecting a hydraulic sensor as a diagnostic sensor to each of these positions. Specifically, the hydraulic pressure of each of the speed-shift clutch mechanisms 42A to 42D is preferably measured by the hydraulic sensor connected to each of the sensor connection positions P1 to P4. Furthermore, the hydraulic pressure of each of the direction-shift clutch mechanisms 41A to 41C is preferably measured by the hydraulic sensor connected to each of the sensor connection positions P5 to P7. Additionally, the hydraulic pressure of the shut-off clutch mechanisms 55 is preferably measured by the hydraulic sensor connected to sensor connection position P8.Additionally, the hydraulic pressure of other line 52b is preferably measured by the hydraulic sensor which is connected to sensor connection position P9.

[0041] A hydraulic pressure measured by the hydraulic sensor connected to each of sensor connection positions P1 to P9 is input as an electrical signal to a controller 10. It should be noted that, for sensor connection positions P8 and P9, the lines connected to controller 10 have been omitted from the drawing for simplicity.

[0042] As in Fig. As shown in Figure 4, sensor connection positions P1 to P8 are arranged, for example, on an upper surface of each of the gearbox 13a and torque converter 13b. This enables the connection and disconnection of the hydraulic sensors with and from sensor connection positions P1 to P8. <Konfiguration von Fehlerdiagnosesystem>

[0043] Next, a configuration of a fault diagnosis system according to the present embodiment will be described with reference to Fig. 5 described.

[0044] Fig. 5 is a diagram showing a configuration of the fault diagnosis system for a work machine in Fig. 1 represents. As in Fig. As shown in Figure 5, the fault diagnosis system includes a working machine (for example, a motor grader) 100, an administration server 65, a user terminal 68, a maintenance terminal 69, and a communication network 62.

[0045] Management server 65 manages information for work machine 100. User terminal 68 is a terminal used by a user of work machine 100. Maintenance terminal 69 is a terminal used by a maintenance technician for work machine 100, who performs maintenance and inspections on the machine. Communication network 62 connects work machine 100, management server 65, user terminal 68, and maintenance terminal 69 for communication purposes.

[0046] Communication network 62 comprises a wireless satellite communication network, a dedicated ground communication network, and a computer communication network. The wireless satellite communication network connects work machine 100 and satellite ground station 61 via a communication satellite 63. The dedicated ground communication network connects satellite ground station 61 and management server 65. The computer communication network is an intranet, the internet, or similar, that connects management server 65 and user terminal 68 or maintenance terminal 69. It should be noted that reference numeral 64 denotes multiple Global Positioning System (GPS) satellites.

[0047] The wireless satellite communication network is used to enable communication between work machine 100 and management server 65, regardless of the work machine 100's location. If the same goal can be achieved, another type of mobile communication network, wireless communication network, or similar can be used instead of the wireless satellite communication network.

[0048] User terminal 68 and maintenance terminal 69, for example, are personal computers, workstations, personal digital assistants (including mobile phones, tablet terminals, and the like), or similar devices. Each of terminals 68 and 69 can run an application program for bidirectional communication with management server 65.

[0049] The 100 work machine can perform bidirectional communication with the 65 management server via the wireless satellite communication system. The 100 work machine features a continuous internal detection and collection of operational information, indicating its current operating status, and transmits this information to the 65 management server, essentially in real time. The 100 work machine's operational information includes, for example, integrated operating time (maintenance counter value), engine speed, battery voltage, fuel level, engine coolant temperature, and similar data.

[0050] Management server 65 contains, for example, a communication server 66 and a maintenance server 67. Communication server 66 controls communication between work machine 100, user terminal 68, and maintenance terminal 69. Maintenance server 67 generates and manages abnormality management information for work machine 100.

[0051] Abnormality information detected in work machine 100 can be displayed on either user terminal 68 or maintenance terminal 69 using communication network 62. Additionally, a command regarding fault diagnosis in work machine 100 can be issued from either user terminal 68 or maintenance terminal 69.

[0052] Display unit 33, which is in Fig. 1 and Fig. The unit shown in 2 can be a display unit of user terminal 68 or maintenance terminal 69. Control 10, which is in Fig. Figure 3 shows any of the following: maintenance server 67, user terminal 68, and maintenance terminal 69. Control 10, which is in Fig. The item shown in 3 can be mounted on the working machine 100. <Konfigurationen von funktionalen Blöcken von Diagnosehilfssystem und Fehlerdiagnosesystem>

[0053] Next, configurations of functional blocks of a diagnostic assistance system and the fault diagnosis system according to the present embodiment are described with reference to Fig. 6 described.

[0054] Fig. Figure 6 is a diagram that shows an example of the functional blocks of the diagnostic assistance system and the fault diagnosis system for the working machine in Fig. 1 represents. As in Fig. Figure 6 shows the diagnostic aid system for motor grader 100, control unit 10, monitoring sensor 31, input device 32, and display unit 33.

[0055] Monitoring sensor 31 detects an operating characteristic of motor grader 100. Monitoring sensor 31 is a sensor that continuously monitors an operating characteristic and can, for example, be the hydraulic sensor connected to any of the sensor connection positions P1 to P9, which are located in Fig. The three shown are connected. Monitoring sensor 31 is not limited to the hydraulic sensor and can be a rotation sensor, a temperature sensor, or the like, and can be any type of sensor.

[0056] Time information regarding the time at which the user perceived an abnormality in the operation of machine 100, or section information regarding a section at which the user perceived the abnormality, is entered into input device 32. Specifically, if the user performs an input operation on input device 32 at a time when an abnormality is perceived (time at which complaints are noticed in the operation), the time of the input operation is entered into input device 32 as time information of the abnormality occurrence time.

[0057] Control unit 10 contains a candidate information acquisition unit 1, an abnormality state determination unit 2, a diagnostic section specification unit 3, a sensor connection position specification unit 4, a sensor extension determination unit 5, a display device control unit 6, and a storage unit 7.

[0058] Storage unit 7 stores a normal operating characteristic value from each unit in the operating characteristic of working machine 100. Furthermore, storage unit 7 stores a table showing a correspondence relationship between a sensor detection position and a diagnostic section (hereinafter referred to as the "first table"), a table showing a correspondence relationship between a section where an abnormality is detected and a diagnostic section (hereinafter referred to as the "second table"), a table showing a correspondence relationship between a diagnostic section and a sensor connection position (hereinafter referred to as the "third table"), and the like.

[0059] Storage unit 7 also stores connection position information, indicating a position to which an existing monitoring sensor is connected and a position to which an existing monitoring sensor is not connected, among the plurality of sensor connection positions (hereinafter referred to as "connection position information"). Storage unit 7 also stores information about a type of sensor that can be connected to each of the plurality of sensor connection positions (hereinafter referred to as "sensor type information").

[0060] Furthermore, storage unit 7 can store an operating characteristic value of each unit of machine 100 at the time the user performs an input operation on input device 32, or at the time an abnormality is perceived while machine 100 is operating. Additionally, storage unit 7 can continuously store the operating characteristic value of each unit in machine 100.

[0061] Candidate Information Acquisition Unit 1 acquires a detection signal from monitoring sensor 31 or an input signal from input device 32. Candidate Information Acquisition Unit 1 outputs the acquired detection signal from monitoring sensor 31 to abnormality state determination unit 2 as candidate information for an abnormality candidate. Furthermore, Candidate Information Acquisition Unit 1 outputs the acquired input signal from input device 32 to diagnostic section specification unit 3 as candidate information for an abnormality candidate.

[0062] Abnormality State Determination Unit 2 determines whether an operating characteristic detected by monitoring sensor 31 is in an abnormal state or not, based on the acquired candidate information (detection signal from monitoring sensor 31). The determination of whether the candidate information is in an abnormal state or not is performed by comparing a characteristic value of the candidate information with the normal characteristic value stored in memory unit 7. For example, if the operating characteristic value detected by monitoring sensor 31 is within a range of the normal operating characteristic value stored in memory unit 7, Abnormality State Determination Unit 2 determines that the operating characteristic is in the normal state.On the other hand, if the operating characteristic value detected by monitoring sensor 31 is outside the range of the normal operating characteristic value stored in memory unit 7, abnormality state determination unit 2 determines that the operating characteristic is in the abnormal state. Abnormality state determination unit 2 outputs a signal indicating the determination result to diagnostic section specification unit 3.

[0063] If it has been determined that the operating characteristic is in an abnormal state, abnormality state determination unit 2 outputs a signal indicating the determination result to display unit control unit 6. Display unit control unit 6 controls display unit 33 to indicate that an abnormality has occurred, based on the detected signal of the determination result. As a result, display unit 33 indicates that an abnormality has occurred.

[0064] Diagnostic Section Specification Unit 3 specifies a section where fault diagnosis is necessary, based on the determination result signal acquired by Abnormality State Determination Unit 2, or the candidate information acquired by Candidate Information Acquisition Unit 1 (input signal from Input Device 32). That is, Diagnostic Section Specification Unit 3 specifies a section where fault diagnosis is necessary based on the candidate information of the abnormality candidate. Diagnostic Section Specification Unit 3 outputs a signal indicating the specified diagnostic section to Sensor Connection Position Specification Unit 4.

[0065] Sensor connection position specification unit 4 specifies a sensor connection position for connecting the diagnostic sensor (first sensor connection position) based on the acquired signal from the diagnostic section. Sensor connection position specification unit 4 refers to the third table stored in memory unit 7 and specifies the first sensor connection position based on the acquired signal from the diagnostic section. Sensor connection position specification unit 4 outputs a signal indicating the specified first sensor connection position to sensor extension determination unit 5.

[0066] Sensor Extension Determination Unit 5 determines whether the sensor is extended or not, based on the detected signal indicating the first sensor connection position. Specifically, Sensor Extension Determination Unit 5 determines whether an existing monitoring sensor is connected to the first sensor connection position or not. Sensor Extension Determination Unit 5 refers to the connection position information stored in Memory Unit 7 and determines whether the monitoring sensor is connected to the first sensor connection position or not, based on the detected first sensor connection position. That is, Sensor Extension Determination Unit 5 determines whether the first sensor connection position to which the diagnostic sensor is to be connected differs from the sensor connection position to which monitoring sensor 31 is connected (second sensor connection position).

[0067] If it is determined that an existing monitoring sensor is connected to the first sensor connection position (if it is determined that the first sensor connection position is the same as the second sensor connection position), Sensor Extension Determination Unit 5 instructs Display Unit Control Unit 6 to display a message to begin fault diagnosis of the sensor connection position.

[0068] On the other hand, if it is determined that no existing monitoring sensor is connected to the first sensor connection position (if it is determined that the first sensor connection position differs from the second sensor connection position), sensor extension determination unit 5 refers to the sensor type information stored in memory unit 7 and determines whether existing monitoring sensor 31 can be re-coupled from the second sensor connection position to the first sensor connection position, based on the detected first sensor connection position.

[0069] If it is determined that the existing monitoring sensor cannot be reconnected from the second sensor connection position to the first sensor connection position, Sensor Extension Determination Unit 5 instructs Display Unit Control Unit 6 to display the position of the first sensor connection position to which the diagnostic sensor is to be additionally connected. In this case, Sensor Extension Determination Unit 5 instructs Display Unit Control Unit 6 to display a prompt to additionally connect a new diagnostic sensor to the first sensor connection position. Furthermore, Display Unit Control Unit 6 is instructed to display a workflow for additionally connecting a new diagnostic sensor to the first sensor connection position.

[0070] On the other hand, if it is determined that the existing monitoring sensor can be re-coupled from the second sensor connection position to the first connection position, sensor extension determination unit 5 instructs display unit control unit 6 to display the position information of the first sensor connection position to which monitoring sensor 31 is to be re-coupled. In this case, sensor extension determination unit 5 instructs display unit control unit 6 to display a prompt to re-couple monitoring sensor 31 to the first sensor connection position. Furthermore, display unit control unit 6 is instructed to display a workflow for re-coupled monitoring sensor 31 to the first sensor connection position.

[0071] Display unit control unit 6 controls display unit 33 based on the instruction signal detected by sensor extension determination unit 5.

[0072] As described above, when the existing monitoring sensor 31 is connected to the first sensor connection position, display unit 33 indicates that fault diagnosis of the sensor connection position has begun.

[0073] If the existing monitoring sensor 31 is not connected to the first sensor connection position and cannot be reconnected to the first sensor connection position, the display unit 33 shows the position information of the first sensor connection position to which a diagnostic sensor must be additionally connected. In this case, the display unit 33 shows a prompt to additionally connect a new diagnostic sensor to the first sensor connection position. Furthermore, the display unit 33 shows a workflow for additionally connecting a new diagnostic sensor to the first sensor connection position.

[0074] If the existing monitoring sensor 31 is not connected to the first sensor connection position and can be reconnected to the first sensor connection position, the display unit 33 shows the position information of the first sensor connection position to which the monitoring sensor 31 is to be reconnected. Furthermore, in this case, the display unit 33 displays a prompt to reconnect the monitoring sensor 31 to the first sensor connection position. Additionally, the display unit 33 shows a workflow for reconnecting the monitoring sensor to the first sensor connection position.

[0075] The position information for the first sensor connection position can be displayed on display unit 33, specifically a page from a manual, operating instructions, or similar document describing the first sensor connection position. Alternatively, the position information for the first sensor connection position can be displayed on display unit 33, showing sensor connection positions P1 to P8, as shown in... Fig. Figure 4 shows the position information for the first sensor connection position on display device 33. As a result, the user or maintenance person can easily determine the location to which the diagnostic sensor should be connected.

[0076] Furthermore, the fault diagnosis system of the present embodiment includes the diagnostic aid system, a diagnostic sensor 34, and an operating characteristic analysis unit 8 of the controller 10. The diagnostic sensor 34 can be a sensor already present at the first sensor connection position or can be a sensor that is newly and additionally connected to the first sensor connection position. The diagnostic sensor 34 detects an operating characteristic of the machine 100 when the machine 100 is in operation, for diagnostic purposes. The diagnostic sensor 34 outputs the detected operating characteristic as a recognition signal to the operating characteristic analysis unit 8 of the controller 10. The operating characteristic analysis unit 8 automatically analyzes the operating characteristic of the machine 100 based on the recognition signal from the diagnostic sensor 34. The operating characteristic analysis unit 8 outputs a signal indicating the analysis result to the display unit / control unit 6.Display unit control 6 controls display unit 33 to show the analysis result, based on the acquired signal of the analysis result. Display unit 33 then displays the analysis result. <diagnosehilfsverfahren>

[0077] Next, a diagnostic aid procedure is described by the diagnostic aid system.

[0078] Fig. Figure 7 is a flowchart that illustrates an example of the diagnostic aid procedure for the working machine according to the embodiment of the present disclosure. Fig. 8 is a flowchart that shows a processing step of sensor extension determination in Fig. 7 shows.

[0079] As in Fig. 6 and Fig. Figure 7 shows that candidate information acquisition unit 1 of controller 10 detects a recognition signal from monitoring sensor 31 or an input signal from input device 32 as a candidate state of an abnormality candidate (step S1: Fig. 7).

[0080] The detection signal from monitoring sensor 31 can, for example, be a detection signal from monitoring sensor 31 that monitors an operating characteristic of the power transmission device. Monitoring sensor 31 can be a sensor located at any of the sensor connection positions P1 to P9 in Fig. 3 is appropriate.

[0081] The input signal from input device 32 is a signal that is input to input device 32 by the user who has perceived a jolt (switching jolt), for example, if the user perceived the switching jolt at the time of the switching operation. For example, in a case where the user performs an input operation on input device 32 at the time the switching jolt is perceived, the input signal from input device 32 is a signal that indicates the time when the input operation is performed. Additionally, in a case where the user inputs the time at which the switching jolt is perceived to input device 32, the input signal from input device 32 is a signal that indicates the input time.Additionally, in a case where the user who has perceived the shift jolt enters a section where the user suspects that an abnormality has occurred into input device 32, the input signal from input device 32 is a signal indicating the section.

[0082] When the detection signal from monitoring sensor 31 is detected, candidate information acquisition unit 1 outputs the detected detection signal from monitoring sensor 31 to abnormality state determination unit 2 as candidate information. Furthermore, when the input signal from input device 32 is detected, candidate information acquisition unit 1 outputs the detected input signal from input device 32 to diagnostic section specification unit 3.

[0083] Based on the acquired candidate information, abnormality state determination unit 2 determines whether the operating characteristic detected by monitoring sensor 31 is in the abnormal state or not (step S2: Fig. 7) If Abnormality State Determination Unit 2 determines that the operating characteristic is not in an abnormal state, the acquisition of a detection signal from Monitoring Sensor 31 (step S1) and the determination of the abnormal state (step S1) are repeated. If Abnormality State Determination Unit 2 determines that the operating characteristic is in the abnormal state, Abnormality State Determination Unit 2 outputs a signal indicating the determination result to Diagnostic Section Specification Unit 3.

[0084] If it is determined that the operating characteristic is in an abnormal state, Abnormality State Determination Unit 2 outputs a signal indicating the determination result to Display Unit Control Unit 6. Display Unit Control Unit 6 controls Display Unit 33 to indicate that an abnormality has occurred, based on the detected signal of the determination result. As a result, Display Unit 33 indicates that an abnormality has occurred. As a result, for example, the user who perceived the shift jolt confirms the information displayed on Display Unit 33 and recognizes a possible abnormality in the power transmission device (for example, clutch mechanisms 41A to 41C, 42A to 42D).

[0085] Based on the signal of the determination result, which was acquired by abnormality state determination unit 2, or the input signal from input device 32, which was acquired by candidate information acquisition unit 1, diagnostic section specification unit 3 specifies a section (diagnostic section) that needs to be diagnosed (step S3: Fig. 7).

[0086] Diagnostic section specification unit 3 specifies the diagnostic section of working machine 100, based on the detection signal from monitoring sensor 31, which was determined to be abnormal. At this time, diagnostic section specification unit 3 specifies the diagnostic section with reference to the first table stored in memory unit 7.

[0087] Additionally, diagnostic section specification unit 3 specifies the diagnostic section of machine 100 based on time information as the abnormality occurrence time or section information related to the section at which the abnormality was perceived. At this time, when the user operates input device 32, the operating characteristic value of each unit of machine 100 at the time input device 32 is operated is stored in memory unit 7. Diagnostic section specification unit 3 identifies the diagnostic section based on a comparison between the operating characteristic value of each unit at the time input device 32 is operated, where the operating characteristic value is stored in memory unit 7, and the normal operating characteristic value of each unit stored in memory unit 7.At this time, the diagnostic section is specified based on the operating characteristic value, which differs from the normal operating characteristic value of each unit, among the operating characteristic values ​​of each unit at the time input device 32 is operated.

[0088] When the user enters the time at which the abnormality is perceived into input device 32, diagnostic section specification unit 3 specifies the diagnostic section based on a comparison between the operating characteristic value of each unit at the input time, among the operating characteristic values ​​continuously stored in memory unit 7, and the normal operating characteristic value of each unit stored in memory unit 7. At this time, the diagnostic section is specified based on the operating characteristic value that deviates from the normal operating characteristic value of each unit, among the operating characteristic values ​​of each unit at the input time.

[0089] When the user enters a section where an abnormality is perceived, diagnostic section specification unit 3 refers to the second table stored in memory unit 7 to identify a diagnostic location.

[0090] Diagnostic section specification unit 3 outputs a signal indicating the specified diagnostic section to sensor connection position specification unit 4.

[0091] Sensor connection position specification unit 4 specifies a sensor connection position for connecting the diagnostic sensor (first sensor connection position), based on the detected signal from the diagnostic section (step S4: Fig. 7) Sensor connection position specification unit 4 can specify a first sensor connection position, or it can specify a plurality of first sensor connection positions. For example, sensor connection position specification unit 4 can specify the plurality of sensor connection positions P1 to P9, which are defined in Fig. Figure 3 shows the first sensor connection positions.

[0092] Sensor connection position specification unit 4 refers to the third table stored in memory unit 7 and specifies the first sensor connection position based on the acquired signal from the diagnostic section. Sensor connection position specification unit 4 outputs a signal indicating the specified first sensor connection position to sensor extension determination unit 5.

[0093] Sensor extension determination unit 5 determines whether the sensor is extended based on the detected signal indicating the first sensor connection position (step S5: Fig. 7) A procedure for determination by sensor extension determination unit 5 is described with reference to Fig. 6 and Fig. 8 described.

[0094] As in Fig. 6 and Fig. As described in section 8, the sensor extension determination unit 5 determines whether an existing monitoring sensor is connected to the first sensor connection position or not (step S51). Fig. 8) Sensor extension determination unit 5 refers to the connection position information stored in storage unit 7 and determines whether the monitoring sensor is connected to the first sensor connection position or not, based on the detected first sensor connection position.

[0095] If it is determined that the existing monitoring sensor is connected to the first sensor connection position, sensor extension determination unit 5 instructs display unit control unit 6 to display a message to begin diagnosing the first sensor connection position (step S52: Fig. 8).

[0096] On the other hand, if it is determined that no existing monitoring sensor is connected to the first sensor connection position, sensor extension determination unit 5 determines whether the existing monitoring sensor can be re-coupled to the first sensor connection position or not (step S53: Fig. 8) Sensor extension determination unit 5 refers to the sensor type information stored in storage unit 7 and determines whether the existing monitoring sensor can be re-coupled to the first sensor connection position or not, based on the detected first sensor connection position.

[0097] At this time, Sensor Extension Determination Unit 5 determines whether the type of first connecting cable at the first sensor connection position matches the type of second connecting cable at the second sensor connection position. If the types are determined to match, Sensor Extension Determination Unit 5 determines that the existing monitoring sensor can be re-coupled to the first sensor connection position. Sensor Extension Determination Unit 5 can determine whether the type of sensor that can be connected to the first sensor connection position is the same as the type of existing monitoring sensor. Furthermore, if the sensor types are determined to be the same, Sensor Extension Determination Unit 5 can determine whether the type of sensor that can be connected to the first sensor connection position is the same as the type of existing monitoring sensor.If it is determined that the second connection cable itself has failed, based on the connection time data, Sensor Extension Determination Unit 5 can determine that the existing monitoring sensor cannot be re-coupled to the first sensor connection position.

[0098] If it is determined that the existing monitoring sensor cannot be re-coupled to the first sensor connection position, sensor extension determination unit 5 instructs display unit control unit 6 to display the position information of the first sensor connection position to which the diagnostic sensor is to be additionally connected (step S54: Fig. 8) In this case, sensor extension determination unit 5 instructs display unit control unit 6 to display information about a workflow for additionally connecting a diagnostic sensor to the first sensor connection position.

[0099] On the other hand, if it is determined that the existing monitoring sensor can be re-coupled to the first sensor connection position, sensor extension determination unit 5 instructs display unit control unit 6 to display the position information of the first sensor connection position to which the monitoring sensor is to be re-coupled (step S55: Fig. 8) In this case, sensor extension determination unit 5 instructs display unit control unit 6 to display information about a workflow for re-coupling the monitoring sensor from the second sensor connection position to the first sensor connection position.

[0100] As described above, sensor extension determination unit 5 determines whether the sensor is extended or not and outputs an instruction signal to display unit control unit 6, based on the determination result.

[0101] As in Fig. 6 and Fig. 7 shows, controls display unit 6 display unit 33, based on the instruction signal detected by sensor extension determination unit 5 (step S6: Fig. 7).

[0102] As described above, when the existing monitoring sensor 31 is connected to the first sensor connection position, display unit 33 indicates that diagnostics of the sensor connection position have begun.

[0103] If the existing monitoring sensor 31 is not connected to the first sensor connection position and cannot be reconnected to the first sensor connection position, the display unit 33 shows the position information of the first sensor connection position to which a diagnostic sensor must be additionally connected. In this case, the display unit 33 shows a prompt to additionally connect a new diagnostic sensor to the first sensor connection position. Furthermore, the display unit 33 shows a workflow for additionally connecting a new diagnostic sensor to the first sensor connection position.

[0104] If the existing monitoring sensor 31 is not connected to the first sensor connection position and can be reconnected to the first sensor connection position, the display unit 33 shows the position information of the first sensor connection position to which the monitoring sensor 31 is to be reconnected. In this case, the display unit 33 also displays a prompt to reconnect the monitoring sensor 31 from the second sensor connection position to the first sensor connection position. Furthermore, the display unit 33 shows a procedure for reconnecting the monitoring sensor to the first sensor connection position.

[0105] The position information for the first sensor connection position can be displayed on display unit 33, specifically a page from a manual, operating instructions, or similar document describing the first sensor connection position. Alternatively, the position information for the first sensor connection position can be displayed on display unit 33, showing sensor connection positions P1 to P8, as shown in... Fig. 4 is shown, displays.

[0106] Furthermore, as information about a workflow related to the diagnostic sensor (additional connection of a new diagnostic sensor or reconnection of a monitoring sensor), a corresponding page from a manual, operating instructions, or similar document describing the workflow can be displayed on display unit 33. Additionally, as information about a workflow related to the diagnostic sensor, an image can be displayed on display unit 33.

[0107] The user or maintenance person can confirm the position information of the first sensor connection point and the workflow on display device 33. As a result, the user or maintenance person can easily find out the location where the diagnostic sensor is to be connected and the workflow for connecting the diagnostic sensor.

[0108] A user or maintenance person reconfigures the existing monitoring sensor as a diagnostic sensor or connects a new diagnostic sensor to the first sensor connection position required for diagnosis, based on the position information of the first sensor connection position displayed on display unit 33. As a result, it is possible to diagnose the first sensor connection position where diagnosis is necessary. <Fehlerdiagnosevorgang nach Verbinden von Diagnosesensor>

[0109] Next, a fault diagnosis process will be performed after connecting the diagnostic sensor with regard to Fig. 9 described.

[0110] Fig. Figure 9 is a flowchart showing a processing step of fault diagnosis after connecting the diagnostic sensor. As shown in Fig. As shown in 9, diagnostic sensor 34 ( Fig. 6) connected to the first sensor connection position necessary for diagnosis by the user or maintenance person (step S11).

[0111] As in Fig. Figure 3 shows that when diagnostic sensor 34 is connected to the first sensor connection position (for example, one of P1 to P9), a signal indicating that diagnostic sensor 34 is connected to the first sensor connection position is output to controller 10. When monitoring sensor 31 ( Fig. 6) When the monitoring sensor 31 is reconnected from the second sensor connection position to the first sensor connection position, the controller 10 recognizes the monitoring sensor 31 as the diagnostic sensor 34 connected to the first sensor connection position, based on a signal indicating that the reconnection of monitoring sensor 31 is complete. Furthermore, when the new diagnostic sensor 34 is connected to the first sensor connection position, the controller 10 recognizes the new diagnostic sensor 34 as the diagnostic sensor 34 connected to the first sensor connection position, based on a signal indicating that the new diagnostic sensor 34 is connected to the first sensor connection position.

[0112] In a case where the existing monitoring sensor 31 is reconfigured as a diagnostic sensor 34, or in a case where a new diagnostic sensor 34 is connected, the system enters a diagnostic mode and a pre-operation check is performed automatically (step S12). The pre-operation check serves to verify, in a state where the machine 100 is stopped, whether the diagnostic sensor 34 is correctly attached to the sensor connection position and whether the diagnostic sensor 34 can correctly detect the operating characteristics.

[0113] As a result of the pre-operation check, if the command and the operating characteristics (for example, hydraulic pressure) differ significantly, the user or maintenance person confirms the connection or replaces diagnostic sensor 34, or instructs controller 10 using input device 32. Furthermore, if no abnormality is found in diagnostic sensor 34 as a result of the pre-operation check, controller 10 controls display device 33 to indicate operating authorization.

[0114] After confirming the operating permit, the user operates machine 100 to simulate an operation that perceived or detected the abnormality (step S13). In a case where the user perceives a jerk during a switching operation, for example, the same operation as the switching operation in which the jerk is perceived is simulated.

[0115] In this operation, control unit 10 automatically analyzes the operating characteristics of machine 100 based on the detection signal from diagnostic sensor 34 (step S14). For example, control unit 10 detects a signal from the diagnostic sensor indicating a change in rotational speed or a change in hydraulic pressure that causes a jerk during switching operation and performs an automatic analysis. Specifically, operating characteristics analysis unit 8 ( Fig. 6) Control unit 10 performs the automatic analysis. Control unit 10 displays the result of the automatic analysis on display device 33 or transmits the result to user terminal 68 or maintenance terminal 69 via communication network 62. As a result, if an exceptional event occurs as a consequence of the automatic analysis, the exceptional event can be analyzed by a quality assurance department, a design department, or the like via maintenance terminal 69.

[0116] As a result of the automatic analysis, the cause of the abnormality is determined and the diagnosis is completed (step S15). If, as a result of the automatic analysis, controller 10 determines that the cause of the abnormality is, for example, the hydraulic valve, controller 10 displays the determination result that the hydraulic valve must be replaced on display device 33 or transmits the determination result to user terminal 68 or maintenance terminal 69 via communication network 62.

[0117] The controller then recommends a next action (step S16). As the next action, the controller 10 displays information on display device 33 about whether machine 100 should be operated continuously or whether operation should be stopped until repair, for example, or transmits the information to user terminal 68 or maintenance terminal 69 via communication network 62. The next action could be an automatic analysis or an instruction to replace a consumable part.

[0118] When the machine is restarted, the monitoring sensor, which is used as the diagnostic sensor, is reconnected to its original sensor connection position (step S17). The monitoring sensor is reconnected, for example, by the user or maintenance personnel.

[0119] As described above, the fault diagnosis operation in the present embodiment ends after the diagnostic sensor is connected (step S18). <wirkungen>

[0120] Next, the effects of the present embodiment will be described.

[0121] As in Fig. 3 and Fig. As shown in Figure 4, for example, in the case of a power transmission device including a gearbox or similar component, there are a large number of sensor connection positions P1 to P9 where hydraulic pressure is to be measured as an operating characteristic. Therefore, installing diagnostic sensors at all sensor connection positions P1 to P9, where hydraulic pressure is to be measured for fault diagnosis, leads to an increase in the number of components. In particular, in the case of a small and medium-sized mass production model, it is difficult, in terms of cost, to install a large number of diagnostic sensors and equip each of these sensors with a communication function.

[0122] In the present embodiment, as in Fig. Figure 6 shows control unit 10 and display unit 33, which displays the position information of the first sensor connection position (for example, P1 to P9) to which the diagnostic sensor is to be connected. Display unit 33 can show, for example, a corresponding page from a manual or operating guide or the like, describing the first sensor connection positions P1 to P9, or an image showing the first sensor connection positions P1 to P8, as shown in Figure 6. Fig. 4 is shown, displays, and can be displayed. The user or maintenance person can easily determine the position to which the diagnostic sensor should be connected by confirming the position information of the first sensor connection positions P1 to P9 on display unit 33. This reduces the effort required to connect the diagnostic sensor during fault diagnosis. Therefore, it is not necessary to install diagnostic sensors at all sensor connection positions P1 to P9 where the operating characteristics are to be measured, and the diagnostic sensor can be connected to a position that is only necessary during fault diagnosis. Thus, simple and accurate fault diagnosis can be performed with a small number of components.

[0123] In the present embodiment, as in Fig. Figure 6 shows that control unit 10 controls display unit 33 to display information about a work process for connecting the diagnostic sensor to the first sensor connection positions P1 to P9. As a result, the user or maintenance person can easily and accurately perform fault diagnosis by confirming the work process on display unit 33.

[0124] In the present embodiment, as in Fig. As shown in Figure 6, controller 10 determines whether the first sensor connection position differs from the second sensor connection position. Accordingly, it is possible to determine whether it is necessary to reconnect the monitoring sensor, which is connected to the second sensor connection position, to the first sensor connection position as the diagnostic sensor.

[0125] Furthermore, in the present embodiment, as in Fig. Figure 6 shows when it is determined that the first sensor connection position differs from the second sensor connection position. Control unit 10 determines whether or not it is possible to reconnect the monitoring sensor from the second sensor connection position to the first sensor connection position. As a result, it is possible to ascertain whether or not an additional new sensor, besides the monitoring sensor, is required as the diagnostic sensor to be connected to the first sensor connection position.

[0126] Additionally, in the present embodiment, as in Fig. Figure 6 illustrates a case where it is determined that re-coupling the monitoring sensor from the second sensor connection position to the first sensor connection position is possible. In this case, controller 10 controls display device 33 to issue a command to re-coupling the monitoring sensor from the second sensor connection position to the first sensor connection position. As a result, the user or maintenance personnel can learn that re-coupling the monitoring sensor from the second sensor connection position to the first sensor connection position is necessary. Furthermore, since the monitoring sensor can be used as the diagnostic sensor, it is not necessary to prepare a separate diagnostic sensor. This allows for fault diagnosis to be performed with a small number of sensors.

[0127] As an example, it is assumed that a monitoring sensor is connected to sensor connection position P9 (second sensor connection position) and no monitoring sensor is connected to the other sensor connection positions P1 to P8. Fig. 3 is connected. In this case, it is possible to diagnose whether or not there is a fault in forward low-speed clutch mechanism 41A by performing fault diagnosis by reconnecting the monitoring sensor connected to sensor connection position P9 to sensor connection position P1, for example. In this way, it is possible to diagnose whether or not there is a fault in each of clutch mechanisms 41A to 42C, 42A to 42D, and 55 by performing fault diagnosis by sequentially reconnecting the monitoring sensor connected to sensor connection position P9 from sensor connection position P1 to sensor connection position P8. Additionally, it is possible to diagnose whether or not there is a fault in hydraulic pump 51, oil filter 56, or the like by performing fault diagnosis while the monitoring sensor is connected to sensor connection position P9.

[0128] In the present embodiment, as in Fig. As shown in Figure 9, the controller 10 recognizes that the monitoring sensor is the diagnostic sensor connected to the first sensor connection position, based on a signal indicating that the monitoring sensor has completed switching from the second sensor connection position to the first connection position. This allows fault diagnosis to be performed using the monitoring sensor as the diagnostic sensor.

[0129] Here, in the above embodiment, control 10, which is located in each of Fig. 3 and Fig. 6 shown, may be mounted on motor grader 100, or may be located remotely from motor grader 100. If controller 10 is located remotely from motor grader 100, controller 10 may be management server 65 (communication server 66, maintenance server 67), which is located in Fig. Figure 5 shows that if the controller 10 is located remotely from the motor grader 100, it can be wirelessly connected to the monitoring sensor 31, input device 32, display device 33, and the like. The controller 10 is a processor, for example, and can be a central processing unit (CPU). The memory unit 7 can be a memory, for example.

[0130] In the above embodiment, the case was described in which the input device 32 and the display device 33 are located in an operator cabin 11, as shown in Fig. The components shown in Figure 1 are arranged, but these components can be located outside the operator's cabin 11. Furthermore, the display device 33 can be located remotely from the motor grader 100. In this case, the display device 33 can be a user terminal 68, a maintenance terminal 69, or the like, or it can be a tablet terminal or the like. If the display device 33 is a tablet terminal, it can also serve as an input device 32.

[0131] Furthermore, the motor grader 100 can be remotely controlled. In this case, the display unit 33, the operating device, and the like are located at a location remote from the motor grader 100. The motor grader 100 is operated by wirelessly receiving an operating command that is output by the display unit 33, the operating device, or the like, located at the remote location.

[0132] In this description, an abnormality is a condition in which the operator perceives, or the sensor detects, that an operating characteristic of the machine is not normal. By performing a diagnosis based on the abnormality information, a diagnosis is made as to whether a fault exists. The operating characteristic may be a pressure other than the hydraulic pressure, or it may be a characteristic such as temperature and speed (for example, rotational speed) instead of pressure.

[0133] The embodiment disclosed herein is to be regarded as illustrative in all respects and not as limiting. The scope of the present invention is defined by the claims, rather than by the descriptions presented above, and it is intended that meanings equivalent to the claims and all modifications within the scope are included. REFERENCE MARK LIST

[0134] 1: Candidate Information Acquisition Unit, 2: Abnormality Condition Determination Unit, 3: Diagnostic Section Specification Unit, 4: Sensor Connection Position Specification Unit, 5: Sensor Extension Determination Unit, 6: Display Unit Control Unit, 7: Storage Unit, 8: Operating Characteristic Analysis Unit, 10: Control Unit, 11: Operator Cab, 11S: Operator Seat, 12: Working Tool, 13: Engine Cover, 13a: Transmission, 13b: Torque Converter, 13c: Engine, 14: Front Frame, 15: Rear Frame, 16: Front Wheel, 17: Rear Wheel, 18: Vehicle Body Frame, 21: Cutting Edge, 22: Drawbar, 23: Slewing Circle, 25: Lifting Cylinder, 28: Articulated Cylinder, 31: Monitoring Sensor, 32: Input Device 33: Display unit, 34: Diagnostic sensor, 41, 41A to 41C: Direction-changing clutch mechanism, 42, 42A to 42D: Speed-changing clutch mechanism, 45: Linkage force control mechanism, 45A to 45G: Electronic control valve, 51: Hydraulic pump, 52a, 52b: Line,53: Shut-off valve, 54: Shut-off solenoid valve, 55: Shut-off coupling mechanism, 56: Oil filter, 61: Satellite ground station, 62: Communication network, 63: Communication satellite, 64: GPS satellite, 65: Management server, 66: Communication server, 67: Maintenance server, 68: User terminal, 69: Maintenance terminal, 100: Working machine (motor grader), 121: Axle line, P1 to P9: Sensor connection position< / wirkungen> < / diagnosehilfsverfahren>

Claims

[1] Diagnostic aid system for a working machine (100), wherein the diagnostic aid system comprises: a display device (33); a controller (10) that specifies a diagnostic section in the working machine (100), based on candidate information about an abnormality candidate in the working machine (100), specifies a first sensor connection position of a diagnostic sensor (34) for diagnosis of the diagnostic section, and controls the display device (33) to display position information of the first sensor connection position; and a monitoring sensor (31) which is connected to a second sensor connection position of the working machine (100), wherein The controller (10) determines whether the first sensor connection position differs from the second sensor connection position, and If the controller (10) has determined that the first sensor connection position differs from the second sensor connection position, the controller (10) determines whether it is possible to reconnect the monitoring sensor (31) from the second sensor connection position to the first sensor connection position or not. [2] Diagnostic aid system for a working machine (100) according to claim 1, wherein the control (10) controls the display device (22) to display information about a work sequence for connecting the diagnostic sensor (34) to the first sensor connection position. [3] Diagnostic aid system for a working machine (100) according to claim 1 or 2, wherein, in determining whether it is possible to reconnect the monitoring sensor (31) from the second sensor connection position to the first sensor connection position, the control (10) determines whether a type of first connection cable for the first sensor connection position matches a type of second connection cable for the second sensor connection position or not. [4] Diagnostic aid system for a working machine (100) according to one of claims 1 to 3, wherein when the control (10) has determined that it is possible to re-couple the monitoring sensor (31) from the second sensor connection position to the first sensor connection position, the control (10) controls the display device (33) to give an instruction to re-couple the monitoring sensor (31) from the second sensor connection position to the first sensor connection position. [5] Diagnostic aid system for a working machine (100) according to claim 4, wherein the control (10) recognizes the monitoring sensor (31) as the diagnostic sensor (34) which is connected to the first sensor connection position, based on a signal indicating that the recoupling of the monitoring sensor (31) from the second sensor connection position to the first sensor connection position is completed. [6] Fault diagnosis system for a working machine (100), wherein the fault diagnosis system comprises: the diagnostic aid system for a working machine (100) according to one of claims 1 to 5; and the diagnostic sensor (34) which is connected to the first sensor connection position, wherein The control unit (10) analyzes an operating characteristic of the working machine (100) based on a recognition signal from the diagnostic sensor (34). [7] Diagnostic aid method for a working machine (100) having a display device (33), the diagnostic aid method comprising: Specifying (S3) a diagnostic section in the working machine (100), based on candidate information of an abnormality candidate in the working machine (100); Specifying (S4) a first sensor connection position of a diagnostic sensor (34) for diagnosis of the diagnostic section; Control (S6) of the display device (33) to display position information of the first sensor connection position; Determine (S51) whether a second sensor connection position to which a monitoring sensor (31) of the working machine (100) is connected differs from the first sensor connection position; and If it is determined (S51) that the first sensor connection position differs from the second sensor connection position, determine (S53) whether it is possible to reconnect the monitoring sensor (31) from the second sensor connection position to the first sensor connection position or not. [8] Fault diagnosis procedure for a working machine (100), wherein the fault diagnosis procedure comprises: Analyze, according to the diagnostic aid method for a working machine (100) according to claim 7, an operating characteristic of the working machine (100) on the basis of a detection signal from the diagnostic sensor (34) which is connected to the first sensor connection position.

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