Diagnostic Information Providing Apparatus for Construction Machine and Diagnostic Information Display System for Construction Machine

• US 20070213855A1
• Filed: 10/27/2005
• Published: 09/13/2007
• Est. Priority Date: 11/17/2004
• Status: Active Grant

• Current Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Inventors: Furuno, Yoshinori, Seo, Munenobu, Sagiya, Kenichi
• Granted Patent: US 7,684,917 B2
• Time in Patent Office: Days
• US Class Current: 700/83
• CPC Class Codes: E02F 9/26 Indicating devices E02F5/145 takes precedence

Abstract

A diagnostic information providing apparatus for a construction machine and a diagnostic information display system for a construction machine, which can find an abnormality before it actually occurs and can reduce a suspension period of the construction machine.

Each of the apparatus and the system comprises a sensor 40, etc. for detecting status variables related to an operating state of a hydraulic excavator 1 or ambient environment, and a controller 2. The controller stores combinations between a plurality of snapshot items and one or more status variables related to each of the snapshot items in advance, acquires or extracts status variable data, which is regarded as being related based on the stored combinations, from corresponding detected signals of the sensor 40, etc. with respect to the snapshot item selected by a selection command from an operator, thereby displaying the status variable data on a display unit 50, and compares each of the status variables or a value computed based on a plurality of status variables with a predetermined reference value range. When the status variable or the computed value is outside the predetermined reference value range, the controller determines a failure of a corresponding part, and displays the failed part or the related status variable on the display unit 50.

Claims

1. A diagnostic information providing apparatus for a construction machine, the apparatus comprising:

detection means for detecting status variables related to an operating state of a construction machine or ambient environment;

storage means for storing combinations between a plurality of snapshot items and one or more status variables related to each of the snapshot items in advance;

status variable display control means for acquiring or extracting status variable data, which is regarded as being related based on the stored combinations, from corresponding detected signals of said detection means with respect to the snapshot item selected by a selection command from an operator, thereby displaying the status variable data on display means;

failed part determining means for comparing each of the status variables or a value computed based on a plurality of status variables, which are contained in the acquired or extracted status variable data, with a corresponding predetermined reference value range, and determining a failure of a corresponding part when the status variable or the computed value is outside the predetermined reference value range; and

failed part display control means for displaying the failed part or the related status variable, which has been determined by said failed part determining means, on said display means.

3. The diagnostic information providing apparatus for a construction machine according to claim 1, wherein said failed part determining means compares the status variable or the computed value with each of a plurality of corresponding reference value ranges to determine a failure in a stepwise manner, and said failed part display control means displays a stage of the failure, which have been determined by said failed part determining means, on said display means.

4. The diagnostic information providing apparatus for a construction machine according to claim 1, wherein said status variable display control means displays changes of the status variable and a minimum value and a maximum value of the status variable within a predetermined time.

2. A diagnostic information providing apparatus for a construction machine, the apparatus comprising:

detection means for detecting status variables related to an operating state of a construction machine or ambient environment;

storage means for storing combinations between a plurality of snapshot items and one or more status variables related to each of the snapshot items in advance;

recording means for acquiring or extracting status variable data, which is regarded as being related based on the stored combinations and falls within a predetermined time, from corresponding detected signals of said detection means with respect to the snapshot item selected by a selection command from an operator, thereby recording the status variable data in said storage means;

status variable display control means for playing back and displaying changes of the status variable data, which is stored in said storage means and falls within the predetermined time, on said display means in accordance with a command from an operator;

failed part determining means for comparing each of the status variables or a value computed based on a plurality of status variables, which are contained in the status variable data falling within the predetermined time, with a corresponding predetermined reference value range, and determining a failure of a corresponding part when the status variable or the computed value is outside the predetermined reference value range; and

failed part display control means for displaying the failed part or the related status variable, which has been determined by said failed part determining means, on said display means.

5. A diagnostic information display system for a construction machine, the system comprising:

detection means for detecting status variables related to an operating state of a construction machine or ambient environment;

display means disposed inside a cab of said hydraulic excavator;

storage means for storing combinations between a plurality of snapshot items and one or more status variables related to each of the snapshot items in advance;

status variable display control means for acquiring or extracting status variable data, which is regarded as being related based on the stored combinations, from corresponding detected signals of said detection means with respect to the snapshot item selected by a selection command from an operator, thereby displaying the status variable data on said display means;

failed part determining means for comparing each of the status variables or a value computed based on a plurality of status variables, which are contained in the acquired or extracted status variable data, with a corresponding predetermined reference value range, and determining a failure of a corresponding part when the status variable or the computed value is outside the predetermined reference value range; and

failed part display control means for displaying the failed part or the related status variable, which has been determined by said failed part determining means, on said display means.

7. The diagnostic information display system for a construction machine according to claim 5, wherein said failed part determining means compares the status variable or the computed value with each of a plurality of corresponding reference value ranges to determine a failure in a stepwise manner, and said failed part display control means displays a stage of the failure, which have been determined by said failed part determining means, on said display means.

8. The diagnostic information display system for a construction machine according to claim 5, wherein said status variable display control means displays changes of the status variable and a minimum value and a maximum value of the status variable within a predetermined time.

6. A diagnostic information display system for a construction machine, the apparatus comprising:

detection means for detecting status variables related to an operating state of a construction machine or ambient environment;

display means disposed inside a cab of said hydraulic excavator;

storage means for storing combinations between a plurality of snapshot items and one or more status variables related to each of the snapshot items in advance;

recording means for acquiring or extracting status variable data, which is regarded as being related based on the stored combinations and falls within a predetermined time, from corresponding detected signals of said detection means with respect to the snapshot item selected by a selection command from an operator, thereby recording the status variable data in said storage means;

status variable display control means for playing back and displaying changes of the status variable data, which is stored in said storage means and falls within the predetermined time, on said display means in accordance with a command from an operator;

failed part determining means for comparing each of the status variables or a value computed based on a plurality of status variables, which are contained in the status variable data falling within the predetermined time, with a corresponding predetermined reference value range, and determining a failure of a corresponding part when the status variable or the computed value is outside the predetermined reference value range; and

failed part display control means for displaying the failed part or the related status variable, which has been determined by said failed part determining means, on said display means.