EP1466805A1 - Signal lumineux ferroviare pour manoeuvres - Google Patents

Signal lumineux ferroviare pour manoeuvres Download PDF

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Publication number
EP1466805A1
EP1466805A1 EP04425231A EP04425231A EP1466805A1 EP 1466805 A1 EP1466805 A1 EP 1466805A1 EP 04425231 A EP04425231 A EP 04425231A EP 04425231 A EP04425231 A EP 04425231A EP 1466805 A1 EP1466805 A1 EP 1466805A1
Authority
EP
European Patent Office
Prior art keywords
light
leds
signal
light signal
signal apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04425231A
Other languages
German (de)
English (en)
Inventor
Mario Cappellini
Roberto Cappellini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elettromeccanica CM Srl
Original Assignee
Elettromeccanica CM Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Elettromeccanica CM Srl filed Critical Elettromeccanica CM Srl
Publication of EP1466805A1 publication Critical patent/EP1466805A1/fr
Withdrawn legal-status Critical Current

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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

Definitions

  • the present invention refers to a railroad advance starting light signal, that is, a signal of a type similar to the conventional one known in the railroad signalisation technique as a call signal.
  • the traditional call signal is constituted by means of two lamps horizontally combined and usually fixed, on the same pole (or post, as it is called in technical jargon) that carries the lamps for first class protection signal therebelow.
  • the call signal is normally off or deactivated; when activated, it projects, in the direction of the incoming train, two milk-white blinking lights which authorize the train to enter the station, thereby overriding the relevant protection signal which is disposed in off-state or stop mode.
  • the light signals of this type have many drawbacks.
  • the latter is a phenomenon of essentially optical nature by which the optical unit - intended to emit the light signal by projecting white or otherwise coloured light - although switched off, is able all the same to project a beam of light following the input and subsequent reflection of foreign radiations (for example, coming from artificial sources like railroad or road lamps and lights, signs, natural sources like sun rays) in the signal-projecting direction.
  • foreign radiations for example, coming from artificial sources like railroad or road lamps and lights, signs, natural sources like sun rays
  • the main object of the present invention is to provide a new type of signal do be associated, for example, with a starting signal of first class, or at least to greatly reduce the above said drawbacks.
  • the present invention makes it possible to greatly increase the reliability and thus the operation safety of this type of signal apparatus and to avoid the onset of the "ghost effect". Moreover, an apparatus according to the present invention is relatively simple to make and cost-effective in relation to the its performance.
  • an apparatus 100 comprises a pair of optical groups, each of which is made up of a matrix 1 of luminous elements or sectors connected electrically to each other.
  • the light advance starting signal apparatus 100 in question comprises two matrixes of blue-coloured light elements disposed horizontally side-by-side.
  • each light element or sector 1 consists of one or more blue-coloured light sources 10 connected in series to each other.
  • the apparatus 100 provides for using two matrixes 1 with eight sectors in the whole, five of which are made up of eleven LEDs in-series, and the other three consisting of ten LEDs also in series, the said sectors being in turn connected in parallel for a total of 85 LEDs.
  • FIG. 6 Shown in Fig. 6 is and electric diagram of a matrix with m sectors in parallel, each of which consists of n LEDs in series. Provided on each sector is a relevant limiting resistance (R 1 , ..., R m ) and n LEDs (D 1,1 , ..., D m,n ).
  • Each LED may be of blue light-type with a typical light intensity of 2.6 cd at 20 mA, and angle of emission of ⁇ 6.5° with respect to its optical axis.
  • the light intensity on the optical axis is higher than 80 cd.
  • the apparatus 100 comprises a containment structure consisting of a base 2 and a lid 3 protruding frontally (and sideways with wings 33) so as to define a screen or shield.
  • the containment structure being possibly made of foamed polycarbonate.
  • the front part 5 of the structure of apparatus 100 is downwardly inclined by an angle ⁇ of about 10°, so as to avoid the reflexes of the sun light towards the train's staff.
  • the base 2 is mounted on a corresponding support 4 allowing it to be fixed to a supporting post or pole (not shown), in correspondence of starting signal of first class, and which provides for an inlet 6 for relevant power cables (not shown) to be connected to a terminal block 7 inside the containment structure of the apparatus 100.
  • the matrixes 1 of LEDs 10, moreover, may be supported by a heat sink 9 of finned aluminium, with consequent advantages from the thermal point of view.
  • LEDs can be used which project white light with different trichromatic coordinates by using coated glass or dichroic blue filters located in front of the LEDs so as to cause the light to take up the desidered blue colour.
  • a light signal apparatus is characterized, as above mentioned, by a high reliability.
  • the description that follows refers in fact to the reliability obtained from a signal apparatus according to the invention, comprising a matrix of LEDs arranged in sectors (or branches) in parallel, each sector including one or more LEDs in series.
  • This special arrangement of the LEDs allows a significant increase of the reliability and availability of the matrix, inasmuch as the individual LEDs are subdivided into more sectors connected in parallel to each other and, in case of any failure of any of them, the signal results still operative and efficient although with less luminosity.
  • a signal apparatus comprising a matrix of LEDs arranged in sectors in parallel, each sector including one or more LEDs in series
  • experimental tests have shown that this arrangement allows a significant increase of the reliability and availability of each of the three optical groups (equal to each other) that form the light signal apparatus.
  • the particular embodiment and technology being used actually bring about a very long average life; by way of non limiting example, such length can be expected of over 20 years.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
EP04425231A 2003-04-08 2004-03-31 Signal lumineux ferroviare pour manoeuvres Withdrawn EP1466805A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITFI20030097 ITFI20030097A1 (it) 2003-04-08 2003-04-08 Segnale luminoso, specialmente per uso in ambito ferroviario come segnale di avvio o chiamata
ITFI20030097 2003-04-08

Publications (1)

Publication Number Publication Date
EP1466805A1 true EP1466805A1 (fr) 2004-10-13

Family

ID=32866052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425231A Withdrawn EP1466805A1 (fr) 2003-04-08 2004-03-31 Signal lumineux ferroviare pour manoeuvres

Country Status (2)

Country Link
EP (1) EP1466805A1 (fr)
IT (1) ITFI20030097A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD118334A1 (fr) * 1975-03-17 1976-02-20
WO1995012512A1 (fr) * 1993-11-05 1995-05-11 Siemens Integra Verkehrstechnik Ag Circuit pour l'emission de signaux optiques
EP0713999A1 (fr) * 1994-11-24 1996-05-29 Siemens Integra Verkehrstechnik Ag Dispositif de signaux lumineux à diodes électroluminescentes
US5663719A (en) * 1993-04-29 1997-09-02 Electro-Tech's LED traffic signal light with automatic low-line voltage compensating circuit
DE19824562A1 (de) * 1997-06-06 1998-12-10 Tiefenbach Gmbh Weichenlagemelder
GB2329011A (en) * 1997-09-04 1999-03-10 Howells Railway Products Limit Light comprising a plurality of LEDs
GB2356694A (en) * 1999-11-26 2001-05-30 Dorman Traffic Products Ltd Signal apparatus comprising individual light units each capable of emitting more than one colour of light
EP1371540A2 (fr) * 2002-06-12 2003-12-17 TECNOLOGIE MECCANICHE s.r.l. Dispositif de signalisation à diodes électroluminescents, particulièrement pour chemins de fer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD118334A1 (fr) * 1975-03-17 1976-02-20
US5663719A (en) * 1993-04-29 1997-09-02 Electro-Tech's LED traffic signal light with automatic low-line voltage compensating circuit
WO1995012512A1 (fr) * 1993-11-05 1995-05-11 Siemens Integra Verkehrstechnik Ag Circuit pour l'emission de signaux optiques
EP0713999A1 (fr) * 1994-11-24 1996-05-29 Siemens Integra Verkehrstechnik Ag Dispositif de signaux lumineux à diodes électroluminescentes
DE19824562A1 (de) * 1997-06-06 1998-12-10 Tiefenbach Gmbh Weichenlagemelder
GB2329011A (en) * 1997-09-04 1999-03-10 Howells Railway Products Limit Light comprising a plurality of LEDs
GB2356694A (en) * 1999-11-26 2001-05-30 Dorman Traffic Products Ltd Signal apparatus comprising individual light units each capable of emitting more than one colour of light
EP1371540A2 (fr) * 2002-06-12 2003-12-17 TECNOLOGIE MECCANICHE s.r.l. Dispositif de signalisation à diodes électroluminescents, particulièrement pour chemins de fer

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DANIEL WURMSER: "Les Signalisations Européennes - L'Italie", CHEMINS DE FER, vol. 1997, no. 04-05, 1997, PARIS, pages 18 - 20, XP002288638 *
MICHAEL ZABEL, JÖRG LIEBSCHER: "LED - Eine neue Generation von Lichtquellen für eisenbahnsignale", SIGNAL + DRAHT., vol. 2000, no. 09, September 2000 (2000-09-01), DETELZLAFF VERLAG GMBH. DARMSTADT., pages 31 - 33, XP009033674 *

Also Published As

Publication number Publication date
ITFI20030097A1 (it) 2004-10-09

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