Claims
- 1. A monitoring device for an elevator comprising:at least two contactlessly actuatable switching devices, each said switching device including an active unit and a passive unit wherein said active unit generates a predetermined pattern as a bit pattern or a bit sequence and said passive unit is excited exclusively by said predetermined pattern, said passive unit being excited by said predetermined pattern at a defined spacing between said active unit and said passive unit; and a bus connecting a central checking unit with said at least two switching devices in a safety chain for the elevator.
- 2. The monitoring device according to claim 1 wherein said at least two switching devices and said central checking unit are connected in series.
- 3. The monitoring device according to claim 1 wherein each said active unit includes a first coil for transmitting said predetermined pattern and each said passive unit includes a second coil for receiving said predetermined pattern.
- 4. The monitoring device according to claim 1 wherein each said passive unit includes an energy store for storing energy from said predetermined pattern.
- 5. The monitoring device according claim 1 wherein said predetermined pattern is a number represented by said bit pattern or said bit sequence.
- 6. The monitoring device according to claim 1 including an elevator door associated with each said switching device, each said elevator door having a first door panel and a second door panel and wherein said active unit is arranged at said first door panel and said passive unit is arranged at said second door panel.
- 7. The monitoring device according to claim 6 wherein each said elevator door is one of a shaft door and a car door.
- 8. The monitoring device according to claim 1 wherein each said active unit is constructed as a transceiver and each said passive unit is a transponder.
- 9. A method of monitoring a safety chain of an elevator comprising the steps of:a. providing a plurality of switching devices and a central checking unit connected in a safety chain for an elevator, each of the switching devices having an active unit and a passive unit associated with one another; b. generating a pattern from each of the active units; c. receiving the pattern from each of the active units with the associated one of the passive units when the associated passive unit is at a defined spacing from the associated active unit; d. generating a response from the associated passive writ upon receiving the pattern; and e. receiving the response from the associated passive unit with the associated active unit.
- 10. The method according to claim 9 including not performing said steps d. and e. when the defined spacing between the associated active unit and the associated passive unit is exceeded.
- 11. The monitoring device according to claim 1 wherein each said active unit is connected to said bus.
- 12. A monitoring device for an elevator comprising:at least two contactlessly actuatable switching devices, each said switching device including an active unit and a passive unit wherein said active unit generates a predetermined pattern as a bit pattern or a bit sequence and said passive unit is excited exclusively by said predetermined pattern, said passive unit being excited by said predetermined pattern at a defined spacing between said active unit and said passive unit to generate a response pattern to said active unit and a central checking unit connected with said active units of said at least two switching devices in a safety chain for the elevator for receiving the response patterns.
- 13. The monitoring device according to claim 11 wherein response patterns are a bit pattern or a bit sequence.
Priority Claims (1)
Number |
Date |
Country |
Kind |
00810706 |
Aug 2000 |
EP |
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Parent Case Info
This is a continuation of Application No. PCT/CH01/00474, filed Feb. 8, 2001.
US Referenced Citations (11)
Foreign Referenced Citations (5)
Number |
Date |
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197 37 464 |
Mar 1999 |
DE |
0 535 205 |
Apr 1993 |
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Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/CH01/00474 |
Feb 2001 |
US |
Child |
10/353648 |
|
US |