Ametek 0 LAND LSP HD 61, Руководство пользователя

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Page 27
User Guide LSP
HD
Linescanner Head
Scan Line Separation = Product Speed m / ft
Scan Frequency
When you have determined the required scan frequency, choose the scan rate that
either closely matches or exceeds the required rate.
It is not good practice to simply select the scanner's maximum scan rate regardless of
process requirements. The reasons for this are outlined below:
Parameter High Speed Low Speed
Scan line separation Closely spaced Widely spaced
Lateral resolution Lower resolution Higher resolution
Disk space for file storage Greater space required Less space required
Processor requirements Higher Lower
6.4 Data Storage Requirements
Data is generated at a rate of approximately 2.5 kB per scan line, with a minimum
requirement of 440 kB for file headers. Therefore, at a scan frequency of 50 Hz, each
one minute measurement period will require 7.94 MB of data storage space.
Landscan WCA software allows you to select a reduced number of lines for storage (see
the Landscan WCA Software Online Help).
Product speed m/s or ft/s
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Scan line separation
6.3 Scan Line Separation