Method of recognizing obstacles on operation of a vibratory pile driver
AssigneeLiebherr-Werk Nenzing GmbH
InventorsPatrick Jussel, Peter Loster
Life of this patent
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Abstract
A method of recognizing obstacles on operation of a vibratory pile driver of a work machine includes monitoring an acceleration signal of the vibratory pile driver during operation of the vibratory pile operator and analyzing the acceleration signal to determine the presence of an obstacle. The acceleration signal may be monitored over a time period which is determined based on an excitation frequency of the vibratory pile driver. The analysis may include comparing negative and positive half-waves of the acceleration signal. Responsive to the analysis indicating an obstacle, a system operator may be alerted, and/or operation of the vibratory pile driver may be adjusted via controller intervention.
Claims17
A method of recognizing obstacles on operation of a vibratory pile driver, comprising:
- with at least one acceleration sensor, detecting an acceleration signal of the vibratory pile driver during operation by a vibratory pile operator and sending the acceleration signal to an electronic controller, wherein the detection takes place over an adjustable observation time period;
- with the controller, selecting the observation time period in dependence on an excitation frequency of the vibratory pile driver;
- and
- with the controller, analyzing the acceleration signal, the analysis comprising comparing negative and positive half-waves of the acceleration signal, and adjusting an actuator of the vibratory pile driver based on the analysis.
A system, comprising:
- a work machine comprising a hydraulic system;
- a leader directly attached to the work machine;
- a vibratory pile driver fastened to the leader and configured to transmit vibrations via clamping grips to a driving element;
- at least one acceleration sensor;
- and
- an electronic controller storing instructions in non-transitory memory that, when executed, cause the controller to:
- detect an acceleration signal from the at least one acceleration sensor during operation of the vibratory pile operator over an adjustable observation time period;
- select the observation time period in dependence on an excitation frequency of the vibratory pile driver;
- analyze the acceleration signal, the analysis comprising comparing negative and positive half-waves of the acceleration signal;
- and
- send a signal to adjust operation of the vibratory pile driver based on the analysis.
Dependencies are inferred from the claim text.