Device and process for guiding a person along a path traveled

• US 7,209,036 B2
• Filed: 04/07/2005
• Issued: 04/24/2007
• Est. Priority Date: 07/07/2004
• Status: Active Grant

• Current Assignee: Draeger Safety Incorporated (Dragerwerk AG)
• Original Assignee: Draeger Safety Incorporated (Dragerwerk AG)
• Inventors: Sattler, Frank, Gerder, Henning, Matthiessen, Hans, Stark, Hartmut, Meyer, Jo, Beckmann, Udo
• Primary Examiner(s): SWARTHOUT, BRENT
• Application Number:
  US11/101,308
• Publication Number:
  US 20060009167A1
• Time in Patent Office: 747 Days
• Field of Search: 340/539.13, 340/539.2, 340/539.14, 340/539.11, 340/539.1, 340/825.49, 340/825.69, 340/825.72, 455/96, 455/404.2, 702/2, 702/5
• US Class Current: 340/539.13
• CPC Class Codes: G01C 21/20 Instruments for performing navigational calculations G01C21/24, G01C21/26 take precedence
• CPC Class Codes: G01S 13/82 wherein continuous-type signals are transmitted
• CPC Class Codes: H04B 1/034 Portable transmitters

Abstract

A device for guiding a person along a traveled path enables the wearer of the device to be guided back along the traveled path in an electronically supported manner even under conditions under which orientation is difficult. The device has a portable ejection means (2), in which a container (14) for accommodating a plurality of transponders (7) and an ejection mechanism (10), which is actuated by a control device (6) to eject a transponder (7) from the container (14), are present. A control unit (6) is prepared such as to actuate the ejection mechanism (10) at predetermined time intervals or at predetermined distances in space. A portable transmitter/receiver device (8) is designed to detect at least one of the transponders (7) dropped off and to generate a signal representative of the direction in which that transponder (7) is located. A portable display device (4) receives the direction signal of the transmitter/receiver means (8) and offers the wearer a visual and/or acoustic display of the direction.

Claims

1. A device for guiding a person along a path traveled, the device comprising:

a plurality of transponders;

an ejection mechanism;

a portable ejection means with said ejection mechanism and a container for accommodating said plurality of transponders, said ejection mechanism being connected with the container;

a control unit, said ejection mechanism being actuated by said control unit in order to eject a transponder from said container, wherein the container ejects transponders by said ejection mechanism at predetermined time intervals or at predetermined distances in space;

a portable transmitter/receiver means for detecting at least one dropped-off transponder and for generating a signal representative of the direction in which the transponder is located; and

a portable display means for receiving the direction signal of the transmitter/receiver means and providing a user one of a visual or acoustic display of the direction.

2. A device in accordance with claim 1, wherein the transmitter/receiver means detects at least the nearest transponder and generates a signal representative of the direction in which the transponder is located.

3. A device in accordance with claim 1, further comprising:

a navigation system for satellite-supported determination of an absolute position, said navigation system being connected with said control unit.

4. A device in accordance with claim 1, further comprising a processor unit for storing an identification code specific to the device in each transponder before it is dropped off, said processor being arranged upstream of the ejection mechanism.

5. A device in accordance with claim 1, further comprising a processor unit for storing a sequence code specific to the position of a particular transponder or storing a link to a code that specifies the transponder and can be read from the transponder with an ordinal number specifying the position in the dropping sequence in each said transponder and to store these in the processor unit or in the control unit, said processor unit being arranged upstream of the ejection mechanism.

6. A device in accordance with claim 1, further comprising a processor unit for storing current position information supplied by the navigation system in a transponder before the transponder is dropped off or linking the current position information with an identification code for the transponder and storing the link of the current position information with the identification code in the processor unit or in the control unit, said processor unit being arranged upstream of the ejection mechanism.

7. A device in accordance with claim 1, wherein the control unit includes means to actuate the ejection mechanism at predetermined, constant intervals in time.

8. A device in accordance with claim 1, wherein the control unit includes means to receive and process the detection signals of the transmitter/receiver means and to actuate the ejection mechanism as soon as the processing of the detection signal of the transponder dropped off last shows that this transponder is located at a predetermined distance or the amplitude of the detection signal is below a preset value.

9. A device in accordance with claim 6, wherein a distance from the next transponder is determined from the drop-off position that can be read from the transponder or is stored in the processor unit or in the control unit and the current position given by the navigation system and is displayed in the display means.

10. A process for guiding a person along a path traveled, the process comprising the steps of:

automatically ejecting transponders at predetermined time intervals or at predetermined distances in space as determined by a controller along the path of the person in order to distribute the transponders along the path traveled; and

detecting at least one of the transponders dropped off with a portable transmitter/receiver means and generating a signal that is representative of the direction in which the transponder is located and displaying the signal generated or information associated with the signal generated on a display means as one of a visual or acoustic signal in order to show the way to the detected transponder for guiding along the path traveled.

11. A process in accordance with claim 10, wherein at least the transponder located nearest to the transmitter/receiver means is detected.

12. A process in accordance with claim 10, wherein the transponders used are passive transponders.

13. A process in accordance with claim 10, further comprising storing a code, which can be unambiguously assigned to the transmitter/receiver means, in each transponder before it is dropped off.

14. A process in accordance with claim 10, further comprising storing a code specifying the position of the particular transponder in the dropping sequence, in each transponder before it is dropped off, or assigning a code, which specifies the transponder that is about to be dropped off and can be read from the transponder, and assigning a code specifying the position of that transponder in the dropping sequence and storing both assigned codes in a linked manner outside the transponder.

15. A process in accordance with claim 10, wherein current position information supplied by a navigation system is stored in each said transponder before it is dropped off, or current position information is linked with an identification code specific to the particular transponder, and this linked information is stored outside the transponder.

16. A process in accordance with claim 10, wherein said transponders are automatically ejected at constant time intervals.

17. A process in accordance with claim 10, further comprising automatically determining the number of steps taken by the person and automatically ejecting a transponder after a predetermined number of steps.

18. A process in accordance with claim 10, wherein the transmitter/receiver means detects the transponder dropped off last and automatically ejects another transponder when the detected signal of the preceding transponder meets a predetermined criterion.

19. A process in accordance with claim 18, wherein another transponder is automatically ejected when the processing of the detection signal of the transponder dropped off previously leads to the result that a predetermined maximum or desired distance in space is reached from the transponder dropped off previously.

20. A device for guiding a person along a path traveled, the device comprising:

a support carried or worn by a user;

an ejection mechanism carried by said support;

a container accommodating a plurality of transponders, said ejection mechanism being connected with the container;

a control unit, said ejection mechanism being actuated by said control unit in order to eject transponders from said container at predetermined time intervals or at predetermined distances in space;

a transmitter/receiver means for detecting at least one dropped-off transponder and for generating a signal representative of the direction in which the transponder is located; and

a display means for receiving the direction signal of the transmitter/receiver means and providing a user one of a visual or acoustic display of the direction.