EP1857344A1 - Signal lumineux - Google Patents

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Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
  • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
  • B61L5/12—Visible signals
  • B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
  • B61L5/1809—Daylight signals
  • B61L5/1881—Wiring diagrams for power supply, control or testing

Definitions

• the invention relates to a light signal, in particular railway light signal.
• the good visibility of the light signals is a fundamental requirement for the safety of rail transport.
• all meteorological conditions such as dusk, snow, fog, rain or strong sunlight
• the light intensity of the signal must be dimensioned such that the transmission of information to the driver is guaranteed.
• the light intensity for the daytime operation and nighttime operation is set permanently. So far, a compromise between technological possibilities and requirements for recognizability has been accepted. Particularly problematic are the resulting too bright signals due to glare and too dark signals due to heavy fog.
• the invention has for its object to provide a light signal whose visibility is significantly improved, especially in unfavorable meteorological conditions.
• the object is achieved with the characterizing features of claim 1.
• tracking the light intensity of the light signal with changing visibility results in a uniformly good visibility of the set signal concept or symbol, for example, for speed specification, even in extreme weather conditions such as fog or strong sunlight.
• the known two-point setting of the light intensity namely for daytime operation and nighttime operation, is extended accordingly by further discrete or continuous setting values.
• a sensor is provided for this purpose, which detects the visibility conditions and whose output signals are fed to an evaluation device for determining the setting values for a signal generator of the light signal.
• sensors are, for example, by use in weather stations or as visibility turbidity sensors for road tunnels, z. B. VICOTEC of SICK AG.
• the sensor is preferably designed according to claim 3 multi-channel, in particular two-channel, wherein the output signals of the sensor are transmitted by means of secure signaling data transmission to the evaluation.
• Signaling safety is an essential criterion for the approval of signaling systems by state authorities responsible for compliance with safety standards.
• a sensor may be provided according to claim 4 for a group of signals, but also for each individual signal or optionally for each light spot of a signal.
• the weather-dependent setting of the light intensity of several signals by means of a single sensor for detecting the lighting conditions is particularly advantageous in closely adjacent signals with expected same visibility.
• the evaluation device is technically safe and designed as a separate module or as a component of the signal generator of the light signal.
• the evaluation device which is used to convert the sensor output signals into control values for the signal generator, i. H. for the light intensity of the light signal serves, can be realized for example by a secure computer of known design.
• the evaluation device is equipped according to claim 5 with a register, are stored in the output signal ranges of the sensor and associated control values for the signal generator of the light signal.
• the output signal ranges of the sensor may vary in their extent, whereby, for example, in the twilight more frequent switching of the light intensity than in day mode or night mode.
• the usual two-point setting for daytime operation and nighttime operation is substantially refined by these discrete to continuous intermediate values. The recognizability of the signals is thus improved not only in the case of weather-related visual clouding but also in the regular change in brightness between day and night.
• the figure shows a schematic representation of the essential components of the light intensity adjustment according to the invention using the example of a railway light signal.
• a two-channel sensor 1 for detecting the current visibility 2, which is superimposed by the day-night cycle with Meteological influences are characterized is connected by means of secure data transmission 3 with an evaluation device 4, which generates control values 5 for adjusting the light intensity 6 by a signal generator 7 of a signal not shown.
• All components 1, 4 and 7 as well as data cables 3 and 5 comply with the safety regulations. This particular redundancy, reliability, fault detection and fail-safe properties, ie the assumption of a safe condition in case of failure, connected.
• the usual day-night switching can be omitted or is replaced by the fine adjustment of the light intensity 6. Too high or too low light intensity 6 of the light signal are avoided, so that significantly improve the recognizability conditions for the driver.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Train Traffic Observation, Control, And Security (AREA)
• Circuit Arrangement For Electric Light Sources In General (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=38353584

Family Applications (1)

Country Status (2)

Cited By (1)

Families Citing this family (2)

Citations (3)

Family Cites Families (1)

• 2006
  • 2006-05-19 DE DE200610024689 patent/DE102006024689A1/de not_active Ceased
• 2007
  • 2007-05-11 EP EP07108073A patent/EP1857344A1/fr not_active Withdrawn

Patent Citations (3)

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