Method for operating a mobile device in a railway system, railway system and mobile device
First Claim
1. A method for operating a mobile device in a railway system, the rail system having at least one optical waveguide laid next to at least one railway track, the optical waveguide being used as a distributed acoustic sensor into which light pulses are fed, and back-scattered light is detected, which comprises the steps of:
- providing the mobile device with a sound generator which can be adjusted with respect to a frequency spectrum in a way which identifies the mobile device;
adjusting the sound generator with respect to the frequency spectrum in a way which designates the mobile device by assigning a frequency selection to the mobile device; and
acquiring an identification number signal of the mobile device by detecting the back-scattered light from a detected frequency selection.
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Accused Products
Abstract
A method operates a mobile device in a railway system with at least one optical waveguide which is laid next to at least one railway track and into which light pulses are fed. The optical waveguide is used as a distributed acoustic sensor and detects scattered-back light. In order to be able to identify reliably such a mobile device in a comparatively easy way, the mobile device is provided with a sound generator which can be adjusted with respect to its frequency spectrum in a way which designates the mobile device. The sound generator is adjusted with respect to its frequency spectrum in a way which designates the mobile device by assigning a frequency selection to the mobile device. An identification number signal of the mobile device is acquired by detecting the scattered-back light from the detected frequency selection. A railway system having such a mobile device is also taught.
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Citations
12 Claims
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1. A method for operating a mobile device in a railway system, the rail system having at least one optical waveguide laid next to at least one railway track, the optical waveguide being used as a distributed acoustic sensor into which light pulses are fed, and back-scattered light is detected, which comprises the steps of:
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providing the mobile device with a sound generator which can be adjusted with respect to a frequency spectrum in a way which identifies the mobile device; adjusting the sound generator with respect to the frequency spectrum in a way which designates the mobile device by assigning a frequency selection to the mobile device; and acquiring an identification number signal of the mobile device by detecting the back-scattered light from a detected frequency selection. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A railway system, comprising:
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at least one railway track; at least one optical waveguide disposed next to said railway track and functioning as a distributed acoustic sensor; a light emitting and evaluation unit containing optical transmitters and optical receivers for back-scattered light and coupled to said distributed acoustic sensor; a frequency spectrum selection module; at least one mobile device having a sound generator being adjusted with respect to a frequency spectrum in a way which designates said mobile device, said sound generator communicatively connected to said frequency spectrum selection module for assigning a frequency selection to said mobile device; and said light emitting and evaluation unit is configured to detect the frequency selection from the back-scattered light and acquire from the back-scattered light an identification number signal of said mobile device. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification