Abnormal operation detection device

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

• a hydraulic operation measuring device that measures a hydraulic operation pressure transmitting plural kinds of operation commands of an operator;
• an integrated amount calculating device that calculates an integrated value in time direction with regard to the hydraulic operation pressure on the basis of a coefficient in correspondence to kind of work of a plurality of said hydraulic operation mechanisms;
• a fluctuation amount calculating device that calculates a fluctuation amount of the hydraulic operation pressure;
• an angle estimating device that estimates a joint angle or a turning angle of said hydraulic shovel on the basis of said integrated value, wherein said angle is calculated by multiplying said integrated value of each of the operation pressures by the coefficient set per operation pressure in accordance with the kind of the work, and adding in the case of the rising (dump) operation or subtracting in the case of the falling (crowd) operation;
• and
• an abnormal operation detecting device that detects an overload operation of said hydraulic shovel on the basis of an estimated angle by said angle estimating device and said fluctuation amount;
• wherein in calculation of said joint angle it is determined whether or not a joint output is beyond a previously set threshold value, If said joint output is beyond the threshold value, then an attitude flag is scraped down;
• wherein in calculation of said joint angle it is further determined whether or not a total of the fluctuation amount of the of the hydraulic operation pressure is beyond a previously set threshold value, if the total of the fluctuation amount of the hydraulic operation pressure is beyond the threshold value than the overload operation is carried out, and outputs to an external portion of the abnormal operation detecting device.

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

• a device that estimates a joint angle of the arm on the basis of an integrated value in time direction with regard to the hydraulic pressure transmitted to said operation mechanism;
• and
• an operation position estimating device that estimates an operation position of an arm of said operation mechanism on the basis of said integrated value, wherein said estimated operation position is calculated by multiplying said integrated value of each of the operation pressures by the coefficient set per operation pressure in accordance with the kind of the work, and adding in the case of the rising (dump) operation or subtracting in the case of the falling (crowd) operation;
• an abnormal operation determining device that measures a fluctuation amount of the hydraulic pressure so as to detect with or without an overload operation, in the case that an estimated joint angle satisfies a fixed condition;
• wherein in calculation of said joint angle it is determined whether or not a joint output is beyond a previously set threshold value, If said joint output is beyond the threshold value, then an attitude flag is scraped down;
• wherein in calculation of said joint angle it is further determined whether or not a total of the fluctuation amount of the of the hydraulic operation pressure is beyond a previously set threshold value, if the total of the fluctuation amount of the hydraulic operation pressure is beyond the threshold value than the overload operation is carried out, and outputs to an external portion of the abnormal operation detecting device.