Patent ID: 6554144
Filing Date: 2003-04-29
Classification: B60M,B66F,H02G

Abstract:
A boom positioning device for high-position working for positioning the tip-end of a boom for high-position working at a predetermined work location with respect to a work object, comprising:means for detecting respective axis positions of the boom; means for computing the position and attitude of the boom tip-end from the respective axis positions of the boom detected by said boom respective-axis-position detecting means; imaging means having a multi-axis driving unit and provided with means for measuring a distance from the boom tip-end position to the work object and view angle adjusting means, attached to the boom; means for displaying images picked up by said imaging means; collimation drawing means for displaying a collimation for specifying a measuring object on said display means in an overlapping manner at the center of the display means; camera manual operating means for manually operating said imaging means so that the measuring object is overlapped with the collimation; measuring error judging means for storing measuring errors in accordance with measuring distances of said distance measuring means and judging whether or not the boom tip-end position is within a range in which the measuring accuracy is guaranteed; first boom working amount calculating means for calculating a boom working amount to an approachable region in which the measuring accuracy of said distance measuring means is guaranteed from an output of said distance measuring means and an output of said measuring error judging means; boom control means for operating the boom based on an output of said first boom working amount calculating means; viewpoint fixing working amount calculating means for calculating a working amount of said imaging means in order to fix the viewpoint of the imaging means during boom working; and second boom working amount calculating means for calculating a boom working amount to a predetermined work position with respect to a work object based on the distance from the boom tip-end position to the work object detected by said distance measuring means within the approachable region, the predetermined work position with respect to the work object, and the boom tip end position.