Travel control device for unmanned conveyance vehicle
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 26, 2013
Grant Date -
Jun 30, 2011
app pub date -
Mar 12, 2010
filing date -
Jun 26, 2009
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An unmanned conveyance vehicle (11) includes a detecting device (23) that has a plurality of sensing elements (25), first to fourth marker sensors (31-34) arranged on both sides of the sensing elements 25, and a magnetic member (35). The sensing elements (25) detect positions of guide tapes (12, 13) laid down along a road travel surface. The marker sensors (31-34) detect magnetic markers (14A-14D) laid down along the road travel surface. The magnetic member (35) is arranged above the sensing elements (25) and the marker sensors (31-34). When a left end (35a) of the magnetic member (35) moves to a position above the branch guide tape (13), the first marker sensor (31) operates, and the left end (35a) is magnetized to the north pole by the magnetic flux of the branch guide tape (13). A right end (35b) of the magnetic member (35) is magnetized to the south pole to operate the third marker sensor (33). As a result, ON signals are output from the first and third marker sensors (31, 33) to an erroneous determination preventing section (52) of a control unit (22). The erroneous determination preventing section (52) determines the ON signals to be invalid.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully