ABNORMAL OPERATION DETECTION DEVICE

• US 20110010059A1
• Filed: 01/27/2009
• Published: 01/13/2011
• Est. Priority Date: 01/30/2008
• Status: Active Grant

• Current Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Inventors: Furuno, Yoshinori, Shibata, Kouichi, Suzuki, Hideaki
• Granted Patent: US 8,509,999 B2
• Time in Patent Office: Days
• US Class Current: 701/50
• CPC Class Codes: E02F 9/24 Safety devices , e.g. for preventing overload E02F9/226 takes precedence
• CPC Class Codes: E02F 9/26 Indicating devices E02F5/145 takes precedence
• CPC Class Codes: E02F 9/267 Diagnosing or detecting failure of vehicles

Abstract

The invention provides an abnormal operation detection device estimating an overload operation of a hydraulic shovel on the basis of an amount of hydraulic operation. An accumulated amount of an operation amount is calculated by an accumulated amount calculating means on the basis of an operation amount of each of operation mechanisms obtained by an operation pressure detecting means, an operation fluctuation amount is calculated by a fluctuation amount calculating means, a joint angle of each of the operation mechanisms is estimated on the basis of the accumulated amount, and an overload operation is determined by using an abnormal operation determining means on the basis of the estimated joint angle and the operation fluctuation amount.

Claims

1. An abnormal operation detection device of a machine provided with an operation mechanism for excavating, comprising:

an operation mechanism transmitting plural kinds of operation commands of an operator to said operation mechanism;

an accumulated amount calculating means calculating an accumulated amount of an operation amount of said operation mechanism on the basis of a coefficient in correspondence to the operation amounts of a plurality of said operation mechanisms;

a fluctuation amount calculating means calculating a fluctuation amount of the operation amount of said operation mechanism;

an operation position estimating means estimating an operation position of said operation mechanism on the basis of said accumulated amount; and

an abnormal operation detecting means detecting an overload operation of said machine on the basis of said estimated operation position and said fluctuation amount.

3. An abnormal operation detection device as claimed in claim 1, further comprising an abnormal operation storage means storing an overload operation of said machine while adding a date in a memory device provided in the device or connected thereto, at a time of detecting the overload operation.

4. An abnormal operation detection device as claimed in claim 1, further comprising an informing means informing an operator of the detection of the overload operation of said machine, at a time of detecting the overload operation.

5. An abnormal operation detection device as claimed in claim 1, further comprising a message means informing an external portion of the detection of the overload operation of said machine by using a communication device connected to the abnormal operation detection device, at a time of detecting the overload operation.

6. An abnormal operation detection device as claimed in claim 1, wherein the abnormal operation detection device carries out an initialization of said estimated operation position or said estimated angle of said machine.

2. An abnormal operation detection device of a hydraulic shovel for excavating, comprising:

a hydraulic operation mechanism transmitting plural kinds of operation commands of an operator;

an accumulated amount calculating means calculating an accumulated amount of operation amounts of said hydraulic operation mechanism on the basis of a coefficient in correspondence to operation amounts of a plurality of said hydraulic operation mechanisms;

a fluctuation amount calculating means calculating a fluctuation amount of the operation amount of said hydraulic operation mechanism;

an angle estimating means estimating a joint angle or a turning angle of said hydraulic shovel on the basis of said accumulated amount; and

an abnormal operation detecting means detecting an overload operation of said hydraulic shovel on the basis of an estimated angle by said angle estimating means and said fluctuation amount.

11. An abnormal operation detection device as claimed in claim 2, further comprising an abnormal operation storage means storing an overload operation of said hydraulic shovel while adding a date in a memory device provided in the device or connected thereto, at a time of detecting the overload operation.

12. An abnormal operation detection device as claimed in claim 2, further comprising an informing means informing an operator of the detection of the overload operation of said hydraulic shovel, at a time of detecting the overload operation.

13. An abnormal operation detection device as claimed in claim 2, further comprising a message means informing an external portion of the detection of the overload operation of said hydraulic shovel by using a communication device connected to the abnormal operation detection device, at a time of detecting the overload operation.

14. An abnormal operation detection device as claimed in claim 2, wherein the abnormal operation detection device carries out an initialization of said estimated operation position or said estimated angle of said hydraulic shovel.

7. An abnormal operation detection device of a machine provided with an arm operation mechanism by a hydraulic pressure, comprising:

a means estimating a joint angle of the arm on the basis of an operation amount of the hydraulic pressure corresponding to said operation mechanism; and

an abnormal operation determining means measuring a fluctuation amount of the hydraulic operation so as to detect with or without an overload operation, in the case that an estimated joint angle satisfies a fixed condition.

8. An abnormal operation detection device as claimed in claim 7, wherein the abnormal operation detection device carries out an initialization of the means estimating the joint angle of said arm.

9. An abnormal operation detection device as claimed in claim 7, further comprising an abnormal operation storage means storing the detection of said overload operation while adding a data in a storage device provided within the apparatus or connected thereto, at a time of detecting said overload operation.

10. An abnormal operation detection device as claimed in claim 7, further comprising an informing means informing an operator of the detection of said overload operation, at a time of detecting said overload operation.