Track-guided transport system with power and data transmission

• US 6,089,512 A
• Filed: 09/23/1997
• Issued: 07/18/2000
• Est. Priority Date: 04/03/1995
• Status: Expired due to Term

• Current Assignee: Cegelec AEG Anlagen und Automatisierungstechnik GmbH (Alstom SA), Daimler-Benz AG (Mercedes-Benz Group AG)
• Original Assignee: Cegelec AEG Anlagen und Automatisierungstechnik GmbH (Alstom SA), Daimler-Benz AG (Mercedes-Benz Group AG)
• Inventors: Wunderlich, Horst, Aldinger, Michael, Huder, Bernhard, Ansorge, Ulrich, Seelig, Anton
• Primary Examiner(s): Le, Mark T.
• Application Number:
  US08/913,857
• Time in Patent Office: 1,029 Days
• Field of Search: 246/63 C, 246/8, 246/63 R, 246/194, 191/10, 104/88.03, 104/88.02, 104/297, 104/296, 333/237, 343/771, 455/523
• US Class Current: 246/194
• CPC Class Codes: B60L 13/00 Electric propulsion for monorail vehicles, suspension vehicles or rack railways; Magnetic suspension or levitation for vehicles tracks for Maglev-type trains E01B25/30; electromagnets per se H01F7/06; linear motors per se H02K41/00
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 5/005 without mechanical contact between the collector and the power supply line
• CPC Class Codes: B61B 13/08 Sliding or levitation systems vehicles with air cushions between rails and vehicles B60V3/04
• CPC Class Codes: B61C 13/04 for elevated railways with rigid rails B61C13/08 takes precedence
• CPC Class Codes: B61L 23/005 Automatic control or safety means for points for operator-less railway, e.g. transportation systems
• CPC Class Codes: B61L 3/225 using separate conductors along the route
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/28 using the near field of leaky cables, e.g. of leaky coaxial cables
• CPC Class Codes: H04B 5/73 for taking measurements, e.g. using sensing coils
• CPC Class Codes: Y02T 30/00 Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance

Abstract

A track-guided transport system with power and data transmission and used for conveying goods. The transport system is provided with a transport element having drive and track-guide elements; storage, input and output units for goods; and a data processing and transmission unit. The transport element is provided with a transmission head as a secondary element for transferring power from a primary circuit laid along the track, the transmission head is mounted on the vehicle comprising a ferrite core and a secondary winding surrounding the core and magnetically is coupled to the primary circuit. An adjustable and controllable drive unit may be provided for forward motion; and a device may be provided for the forward motion for low-friction compensation of gravity and to ensure low-friction sliding along a track, as well as track-guide elements.

Claims

1. A track-guided transport device for transporting goods, comprising:

path means for providing a path of travel, the path means including support and track-guidance elements (16);

a transport element (10) to carry the goods, the transport element (10) including a data-processing and information-transmission unit (20), and a regulatable and controllable drive unit (17) for moving the transport element (10) along the path of travel;

an energy-transmission device for contactless, inductive transmission of electrical energy to the transport element, the energy-transmission device including a conductor arrangement (6,

     7) that is laid along the path of travel and that forms a primary circuit of the energy-transmission device, and a transmitter head (2) that is connected to the transport element, with the transmitter head including a soft-magnetic ferrite core and a secondary winding (W₂) that surrounds the core and is magnetically coupled to the primary circuit; and

information-transmission means for transmitting information between the transport element (10) and a stationary station, the information-transmission means including a member that is integrated into the conductor arrangement (6,

     7) of the energy-transmission device or is integrated into the support and track-guidance elements (16) of the path means,

wherein the conductor arrangement (6,

     7) of the primary circuit of the energy-transmission device is integrated into the support and track-guidance elements (16), and

wherein the primary circuit includes an inside conductor (b) and a U-shaped outside conductor (7) which surrounds the inside conductor coaxially, the outside conductor (7) being connected to the support and track-guidance elements in a conductive manner.

2. A track-guided transport device accordance to claim 1, wherein the member of the information-transmission means comprises a leakage waveguide (1) that is laid along the path of travel and secured to the support and track-guidance elements (16) or to the conductor arrangement (6, 7), and wherein the information-transmission means further comprises an antenna (14) that is disposed on the transport element (10) for transmitting information between the transport element (10) and the leakage waveguide (1).

3. A track-guided transport device according to claim 2, wherein the leakage waveguide (1) is configured as a coaxial line that is provided with slots (3) extending transversely to the direction of wave propagation and acting as radiation openings, with the slots spacing periodically repeating in groups.

4. A track-guided transport device according to claim 3, wherein the antenna (14) is carried by the transmitter head (2) and disposed adjacent the leakage waveguide (1).

5. A track-guided transport device according to claim 2, wherein the leakage waveguide (1) is configured as a coaxial line having a longitudinal slot (3) in the axial direction, and wherein the antenna is configured as a near-field sensor that is movable along the longitudinal slot.

6. A track-guided transport device according to claim 2, wherein the energy-transmission device further includes a conductor support (S) for the inside conductor (6) of the primary circuit, the conductor support having an upper end and the leakage waveguide (1) being disposed at the upper end of the conductor support (S).

7. A track-guided transport device according to claim 1, wherein the member of the information-transmission means comprises a leakage waveguide (1), wherein the support and track-guidance elements have angles and gaps, and wherein the conductor arrangement (6, 7) of the energy-transmission device and the leakage waveguide (1) of the information-transmission means are disposed in the angles and gaps of the support and track-guidance elements (16).

8. A track-guided transport device according to claim 2, wherein a carrier frequency of the ISM band 2.4 GHz is received by the leakage waveguide (1) to transmit information.

9. A track-guided transport device according to claim 2, wherein the conductor arrangement (6, 7) of the energy-transmission device simultaneously forms the leakage waveguide (1) of the information-transmission means.

10. A track-guided transport device according to claim 1, wherein the information-transmission means further includes a first coupling element (K) that is configured as a filter and that is connected at a feed-in point for transmitting energy, which coupling element superposes a medium-frequency current with a higher frequency signal for transmitting information from the stationary station (12) to the transport element (10), and, in an opposite direction, separates a higher frequency signal for transmitting information from the transport element (10) to the stationary station (12) from the medium-frequency current, and a corresponding second coupling element (K'"'"') that is connected to the secondary winding (W2, W2'"'"') of the transmitter head (2).

11. A track-guided device according to claim 1, wherein electrical energy is supplied to the conductor arrangement (6, 7) at a feed-in point, wherein the energy-transmission device further includes an insulating conductor support (S) for the inside conductor (6), and connection means for connecting the inside conductor (6) to the outside conductor (7) at an end of the conductor arrangement (6, 7) that is remote from the feed-in point, and wherein the ferrite core is U-shaped and has legs that surround the inside conductor (6) and support the secondary winding (W₂).

12. A track-guided transport device according to claim 1, wherein the transport element (10) includes a capacitor (C) and a load (Z), the data-processing and information-transmission unit (20) and the drive unit (17) providing at least a portion of the load (Z), the load (Z) being connected to the secondary winding (W₂) and the capacitor (C) being connected parallel to the load (Z).

13. A track-guided transport device according to claim 2, wherein the transport element (10) further includes another capacitor (C2) that compensates for inductive line drop, the another capacitor (C2) being connected between the secondary winding (W₂) and the load (Z).

14. A track-guided device according to claim 1, wherein the ferrite core is U-shaped and has legs, and wherein the energy-transmission device further includes a conductor support (S) for the inside conductor (6), the conductor support (S) having a ferritic region for reducing magnetic gap widths between the conductor support (S) and the legs of the ferrite core.

15. A track-guided transport device according to claim 1, wherein a gap plane between the conductor arrangement (6, 7) and the transmitter head (2) extends parallel to the path of travel in order to assure play for vehicle cornering.

16. A track-guided transport device according to claim 1, wherein the transport element (10) further includes a roller (18) running on at least one of the support and track guidance elements (16), the gravitational force acting on the transport element (10), including the goods carried by it, being compensated by the roller (18).

17. A track-guided transport device according to claim 1, wherein the drive unit (17) comprises a linear motor, and further comprising a magnetic levitation system to compensate for the gravitational force acting on the transport element (10), including the goods carried by it.

18. A track-guided device according to claim 1, wherein information concerning at least one of conveying, storing, sorting, and distribution of goods carried by the transport element (10) is received by the data-processing and information-transmission unit (20) from the stationary station (12).

19. A track-guided device according to claim 1, further comprising a driven transverse belt conveyor for loading and unloading goods (G) onto and from the transport element (10).

20. A track-guided device according to claim 1, further comprising switches serving as active track-guidance elements.