Enhanced Positioning Algorithm Using a Single Image in an LCD-Camera System by Mesh Elements’ Recalculation and Angle Error Orientation

In this article, we present a method to position the tool in a micromachine system based on a camera-LCD screen positioning system that also provides information about angular deviations of the tool axis during its running. Both position and angular deviations are obtained by reducing a matrix of LEDs in the image to a single rectangle in the conical perspective that is treated by a photogrammetry method. This method computes the coordinates and orientation of the camera with respect to the fixed screen coordinate system. The used image consists of 5 × 5 lit LEDs, which are analyzed by the algorithm to determine a rectangle with known dimensions. The coordinates of the vertices of the rectangle in space are obtained by an inverse perspective computation from the image. The method presents a good approximation of the central point of the rectangle and provides the inclination of the workpiece with respect to the LCD screen reference system of coordinates. A test of the method is designed with the assistance of a Coordinate Measurement Machine (CMM) to check the accuracy of the positioning method. The performed test delivers a good accuracy in the position measurement of the designed method. A high dispersion in the angular deviation is detected, although the orientation of the inclination is appropriate in almost every case. This is due to the small values of the angles that makes the trigonometric function approximations very erratic. This method is a good starting point for the compensation of angular deviation in vision based micromachine tools, which is the principal source of errors in these operations and represents the main volume in the cost of machine elements’ parts.

ANALISA PERAN MODERASI AUDIT TENURE DALAM HUBUNGAN ANTARA ORIENTASI KESALAHAN INDIVIDU DAN IKLIM KESALAHAN ORGANISASI TERHADAP PENANGANAN KESALAHAN PADA AUDITOR INSPEKTORAT KEMENTERIAN DI INDONESIA

The auditor’s error handling strategy as auditor behavior after detecting an auditee’s error has significant impact on repeat error finding especially unintentional errors. The purpose of this study was to investigate factor determining error management as auditor error handling strategy from organizational and individual aspect also investigate moderation role of audit tenure. 103 government auditor involve in this study as respondent collecting via convenience sampling, with linear regression and interaction moderated regression as data analysis method. Result of this study shows both organizations’ error climate and person’s individual error orientation has positive significant impact on error management as auditor error handling strategy otherwise moderation of audit tenure have no empirical evidence. Thus error management is conducting by auditor in an open climate organization with greater person’s individualerror orientation.