公开(公告)号：US11726491B2

公开(公告)日：2023-08-15

申请号：US16280871

申请日：2019-02-20

Applicant: THE RAYMOND CORPORATION

Inventor： John Bryant Kirk ,  Erric Heitmann ,  Steven Medwin ,  James Wilcox ,  Jonathan William Hamlin

IPC: H04W84/10 ,  G05D1/02 ,  H04W84/12

CPC classification number: G05D1/0265 ,  G05D1/0219 ,  G05D1/0234 ,  G05D1/0246 ,  G05D1/0276 ,  G05D1/0297 ,  G05D2201/0216 ,  H04W84/12

Abstract: A material handling vehicle guidance system comprises a first conductive member, a second conductive member, and an electrical current source. The second conductive member is electrically coupled to the first conductive member and extends parallel to the first conductive member to define a loop. The first conductive member and second conductive member are coupled to a shielded cable connector. The electrical current source supplies current to the first conductive member in a first direction and supplies current to the second conductive member in a second direction opposite the first direction to produce a narrowcast radio frequency signal detectable between the first conductive member and the second member.

公开(公告)号：US20190258266A1

公开(公告)日：2019-08-22

申请号：US16280871

申请日：2019-02-20

Applicant: THE RAYMOND CORPORATION

Inventor： John Bryant Kirk ,  Erric Heitmann ,  Steven Medwin ,  James Wilcox ,  Jonathan William Hamlin

IPC: G05D1/02

Abstract: A material handling vehicle guidance system comprises a first conductive member, a second conductive member, and an electrical current source. The second conductive member is electrically coupled to the first conductive member and extends parallel to the first conductive member to define a loop. The first conductive member and second conductive member are coupled to a shielded cable connector. The electrical current source supplies current to the first conductive member in a first direction and supplies current to the second conductive member in a second direction opposite the first direction to produce a narrowcast radio frequency signal detectable between the first conductive member and the second member.