Wasp Bar Code WWS500 开发者指南

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页码 42
Chapter 1
2
Introduction
Barcoding is the most common Automated Data Collection (ADC)
technology providing timely, error-free information that can be used to
increase productivity, accuracy, and efficiency in the workplace.  Virtually
every type of industry is using bar codes to replace keyboard data entry.
Studies have shown that a proficient data entry operator will make one
error for every 300 characters that are manually entered.  The error rate
using barcodes is almost negligible and can be error-free using barcode
symbologies with the check digit enabled.
The Wasp Charged Coupled Device (CCD) technology is a technique
whereby a barcode is photographed, digitized, and electronically sampled
by built-in photodetectors.  The detectors process the measurement of
every bar and space using the number of adjacent photodetectors which
contrast a black mark and a white space. The Wasp WWS500 Freedom
Scanner is extremely rugged since it has no moving parts. 
Of all the hand held barcode scanning devices on the market, the CCD
reader is the easiest to use and most cost effective for the typical business
user. The Wasp WWS500 Freedom Scanner is an extended distance
scanner with a depth of reading of up to one foot depending on the mil
size of the barcode. To activate the scanner, the user simply points the
scanning aperture towards the barcode, pulls the trigger, and aims the red
LED beam across the barcode.