Browse Prior Art Database

Self Orienting Wand for Hand Scanning Bar Coded Data

IP.com Disclosure Number: IPCOM000077928D
Original Publication Date: 1972-Oct-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Wright, WV: AUTHOR

Abstract

Single-aperture scanners for manually scanning bar-coded data are subject to errors, due to accelerations of the wand under control of the user. The errors introduced by the accelerations can be eliminated by utilizing two spaced sensors or apertures. This solution will work, only if a line connecting the sensors is displaced no more than 30 degrees with respect to the center line of the coded data.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Self Orienting Wand for Hand Scanning Bar Coded Data

Single-aperture scanners for manually scanning bar-coded data are subject to errors, due to accelerations of the wand under control of the user. The errors introduced by the accelerations can be eliminated by utilizing two spaced sensors or apertures. This solution will work, only if a line connecting the sensors is displaced no more than 30 degrees with respect to the center line of the coded data.

A three aperture or sensor scanning device is illustrated in the drawing which permits any orientation of the scanner. With the arrangement illustrated, the signals from the first and last of the sensors to reach the beginning of the coded elements are used to decode the coded data. Signals from the other sensor are ignored. If two sensors detect a transition, that is an edge of a coded element, simultaneously one or the other is arbitrarily selected since the data from both is redundant.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]