EP0662276B1 - Verfahren und vorrichtung zur überwachung einer glühlampe, insbesondere im dunklen zustand - Google Patents

Verfahren und vorrichtung zur überwachung einer glühlampe, insbesondere im dunklen zustand Download PDF

Info

Publication number
EP0662276B1
EP0662276B1 EP93920701A EP93920701A EP0662276B1 EP 0662276 B1 EP0662276 B1 EP 0662276B1 EP 93920701 A EP93920701 A EP 93920701A EP 93920701 A EP93920701 A EP 93920701A EP 0662276 B1 EP0662276 B1 EP 0662276B1
Authority
EP
European Patent Office
Prior art keywords
lamp
actual value
time interval
incandescent lamp
lamp current
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.)
Expired - Lifetime
Application number
EP93920701A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0662276A1 (de
Inventor
Heinz-Peter Baumgarte
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP93920701A priority Critical patent/EP0662276B1/de
Publication of EP0662276A1 publication Critical patent/EP0662276A1/de
Application granted granted Critical
Publication of EP0662276B1 publication Critical patent/EP0662276B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection

Definitions

  • the invention relates to a method and a device for checking the functionality of an incandescent lamp.
  • this arrangement has the disadvantage that a complete monitoring of the functionality, including the detection of possible short-circuits or shunts, is not possible through the exclusive use of the so-called "dark current method". Rather, a first measurement of the so-called cold resistance and a second measurement of the so-called warm resistance must be carried out to determine the actual value of the resistance ratio. To determine the cold resistance, the incandescent lamp is supplied with only low enough energy that it does not light up. In contrast, when determining the warm resistance, the incandescent lamp is supplied with normal energy, so that it lights up completely.
  • the known arrangement is also complex since two precise measuring sensors are used to determine the resistance values Detection of the lamp current and the lamp voltage are necessary.
  • the arrangement requires a great deal of computation, since the resistance values or resistance ratios have to be processed and stored as absolutely correct measured values.
  • the energy source for supplying the arrangement must be designed to be switchable, since in addition to supplying high energy corresponding to the nominal power for the warm resistance measurement, it must also provide low energy for the cold resistance measurement.
  • the known arrangement has the further disadvantage that it must have good current control, since in particular the measurement of the heat resistance when the incandescent lamp is fully lit must always take place at the same operating point. Otherwise, the recorded values would be subject to a large measurement error, particularly for the heat resistance.
  • the measurement in the known arrangement requires a certain amount of time, since both the measurement of the cold resistance and of the warm resistance after switching on the energy source must wait until a steady state occurs at the respective operating point.
  • the invention has for its object to provide a method and a preferred device with which a full check of the functionality the light bulb in all possible faults, ie in the event of filament or wire breakage and short-circuit or shunt, can be done in a much simpler and yet completely safe manner, without it being necessary for the functional test, the lamp in the fully switched on, lighting up state bring to.
  • Fig. 1 shows a lamp circuit with a filament lamp 2, the lamp current I L is supplied after connection to an energy source 1 with the supply voltage U L.
  • the line resistance of the lamp circuit is symbolized by a discrete equivalent resistor 3.
  • the energy source 1 is preferably a network connection with a buffer battery connected via a rectifier.
  • the lamp circuit of FIG. 1 has a measuring device 4 for detecting the actual value of the lamp current I L and a controllable switching device 5 for switching the incandescent lamp 2 on and off to the supply voltage U L.
  • a control device 6 which switches the incandescent lamp 2 to the supply voltage U L for a predeterminable time period T by actuating the switching device 5 and which, according to the invention, has a first actual value I LA and a second actual value I LE of the lamp current from the measuring device 4 recorded at certain times.
  • a status signal Z signals the functional status.
  • Case A in FIG. 2 first shows the characteristic current profile of an intact incandescent lamp.
  • the lamp current I L jumps to an initial current value I LA .
  • I LA initial current value
  • I LE second actual value
  • the invention thus has the advantage that it is not necessary to record the actual current values I LA and I LE with a very high absolute accuracy. It is already fully sufficient to detect the occurrence of a drop ⁇ I in the lamp current after connection to a supply voltage. If, in accordance with case B shown in FIG. 2, there is a broken filament or lead, the first actual value I LA at the start of the connection and the second actual value I LE measured at the end of the predetermined period T each have the value 0, and the Difference ⁇ I is also 0. Because of the non-occurring drop in lamp current after it has been connected to the supply voltage, this fault can be reliably detected. In the same way, according to case C in FIG.
  • the method according to the invention is thus particularly characterized in that the formation of a difference from two actual current values is sufficient for detecting all lamp function states, the first actual value I LA at the start of a connection to a supply voltage and the second actual value I LE after a predetermined period T then tapped.
  • the duration of the time period T is predetermined as a function of the current size of the first actual value at the beginning of an activation in such a way that when a decrease in the first actual value occurs, especially in comparison to the expected size of its nominal value, the duration of the time period is extended until the measurement of the second actual value. This is further explained with the aid of the courses shown in FIGS. 3.4.
  • FIG. 3 shows three characteristic current profiles I, II, III which occur after the incandescent lamp has been connected to a supply voltage.
  • the courses differ in the size of the first actual value of the lamp current that occurs at the start of the connection.
  • the first profile I thus has a large first actual value I L1A , which preferably corresponds to the normal current value to be expected at this moment.
  • the first actual value I L2A is noticeably smaller in case II and has further decreased to size I L3A in case III.
  • the differences ⁇ I L1 , ⁇ I L2 , ⁇ I L3 are taken from measured actual values increasingly.
  • the cause of a decrease in the respective first actual values of the lamp current and consequently the decreasing values of the differences ⁇ I L1 , ⁇ I L2 , ⁇ I L3 due to the increasing flattening of the respective drop in the lamp current can be seen in a temporary decrease in the supply voltage U L or in different values of line resistance 2 in the lamp circuit due to location-dependent different line lengths.
  • the duration of the period T, T1, T2 or T3 is specified according to the invention depending on the current size of the first actual value I L1A , I L2A ,, I L3A at the beginning of an activation in such a way that when a decrease in the first actual value occurs in accordance with the cases I, II, III shown in Fig. 3.4, the duration of the period T1, T2, T3 until the measurement of the second actual value I L1E , I L2E , I L3E is extended.
  • a first actual value I L1A is measured at the first course I at the beginning of the connection, and after the time period T1 the second actual value I L1E is measured. From this, a difference ⁇ I L1 can be derived, the value of which is sufficiently large to detect the correct functional state of the incandescent lamp.
  • a first actual value I L2A of the lamp current occurs in case II at the beginning of the connection, which has a reduced value.
  • the duration of the period T2 is extended and the second actual value I L2E is only determined when it expires.
  • At least one further, third actual value is measured inside the time period T or T1, T2, T3, which is temporally between the first and second actual values.
  • the method according to the invention can be further refined by adding such further measuring points. Is z. For example, a short or shunt as shown in FIG. 2, case C before and if a voltage drop occurs during the period T, in this rare exceptional case the second actual value I LE at the end of T is less than I LA , although both values should be approximately the same. There is now a noticeable difference between the two actual values, so that an error-free lamp circuit would be incorrectly reported.
  • a third actual value lying in between is acquired, it has approximately the size of the second or first actual value, depending on whether the voltage drop occurs before or after the acquisition of the third actual value.
  • the presence of the "short or shunt" fault can thus be reliably detected despite the occurrence of a voltage drop.
  • further actual values are recorded during the time period T or T1, T2, T3, then, despite the presence of even more complicated and therefore considerably rarer error constellations in particular in connection with abruptly changing supply voltages, the reliable detection of the respective functional state of the incandescent lamp can be ensured.
  • the duration of the period T according to FIG. 2, or of the periods T1, T2, T3 according to FIG. 3, 4 is specified in particular by the control device 6 in FIG. 1 such that during this The incandescent lamp 2 does not yet light up, and this in particular in turn by means of the control device 6 at the end of the period T, T1, T2 or T3 after measuring the second actual value I LE , I L1E , I L2E or I L3E of the lamp current I L is again separated from the supply voltage U L.
  • the first actual value I L2A is smaller than the comparison value I L1A of case I, such a reduced current with a correspondingly less pronounced decay behavior can flow through the incandescent lamp 2 for a longer period of time T2 without lighting up the same is to be feared. Due to the lower lamp current between the values I L2A and I L2E , the filament heats up correspondingly more slowly, so that no illumination has occurred even at the end of an extended period T2 or T3. After tapping the second actual value of the lamp current at the end of the period T1, T2, T3, the lamp can thus be disconnected from the supply voltage again without impairing the functionality of the checking method according to the invention or the checking device.
  • the lamp current can continue to flow beyond the end of the respective period and the incandescent lamp can be completely illuminated without limitation of the invention. Accordingly, in FIGS. 2, 3, 4 the falling course of I L in each case A or I is also beyond the end of the period T or T1 extended in the form of a dashed line. It is therefore irrelevant for the method according to the invention whether it is used to check the function of an incandescent lamp in the so-called "dark state" or in each case at the start of a complete connection.
  • the inventive device shown in FIG. 1 is finally also suitable in that the control means 6 selects the lamp current I L through a pulse-like actuation of the switching device 5 with a predeterminable pulse duty ratio controlled to a predetermined value after a full activation of the bulb 2.
  • the components of the lamp current measuring device 4, switching device 5 and control unit 6 according to FIG. 1 can thus be used advantageously both for executing the method according to the invention and for regulating the lamp current when the incandescent lamp is fully switched on.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
EP93920701A 1992-09-25 1993-09-10 Verfahren und vorrichtung zur überwachung einer glühlampe, insbesondere im dunklen zustand Expired - Lifetime EP0662276B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93920701A EP0662276B1 (de) 1992-09-25 1993-09-10 Verfahren und vorrichtung zur überwachung einer glühlampe, insbesondere im dunklen zustand

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP92116464 1992-09-25
EP92116464 1992-09-25
PCT/EP1993/002454 WO1994008438A1 (de) 1992-09-25 1993-09-10 Verfahren und vorrichtung zur überwachung einer glühlampe, insbesondere im dunklen zustand
EP93920701A EP0662276B1 (de) 1992-09-25 1993-09-10 Verfahren und vorrichtung zur überwachung einer glühlampe, insbesondere im dunklen zustand

Publications (2)

Publication Number Publication Date
EP0662276A1 EP0662276A1 (de) 1995-07-12
EP0662276B1 true EP0662276B1 (de) 1996-03-27

Family

ID=8210058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93920701A Expired - Lifetime EP0662276B1 (de) 1992-09-25 1993-09-10 Verfahren und vorrichtung zur überwachung einer glühlampe, insbesondere im dunklen zustand

Country Status (9)

Country Link
EP (1) EP0662276B1 (da)
AT (1) ATE136189T1 (da)
CZ (1) CZ283430B6 (da)
DE (1) DE59302071D1 (da)
DK (1) DK0662276T3 (da)
ES (1) ES2085171T3 (da)
FI (1) FI951382A0 (da)
SK (1) SK37895A3 (da)
WO (1) WO1994008438A1 (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7129856B2 (en) 2001-08-16 2006-10-31 Siemens Aktiengesellschaft Illuminated sign for traffic control and method for functional monitoring of such a sign

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6674800B1 (en) 2000-08-29 2004-01-06 Koninklijke Philips Electronics N.V. Method and system for utilizing a global optimal approach of scalable algorithms

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61124227A (ja) * 1984-11-19 1986-06-12 日産自動車株式会社 負荷状態判別装置
EP0434859B1 (de) * 1989-12-27 1993-07-07 Scheidt & Bachmann Gmbh Anordnung zur Überwachung der Funktionsfähigkeit einer Glühlampe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7129856B2 (en) 2001-08-16 2006-10-31 Siemens Aktiengesellschaft Illuminated sign for traffic control and method for functional monitoring of such a sign

Also Published As

Publication number Publication date
ATE136189T1 (de) 1996-04-15
ES2085171T3 (es) 1996-05-16
CZ283430B6 (cs) 1998-04-15
FI951382A (fi) 1995-03-23
FI951382A0 (fi) 1995-03-23
SK37895A3 (en) 1995-08-09
DK0662276T3 (da) 1996-08-05
EP0662276A1 (de) 1995-07-12
DE59302071D1 (de) 1996-05-02
CZ58595A3 (en) 1995-06-14
WO1994008438A1 (de) 1994-04-14

Similar Documents

Publication Publication Date Title
DE69914054T2 (de) Standardeinrichtung zur Steuerung eines Elektromagneten zum Öffnen oder Schliessen eines Schutzschalters
WO2001052607A1 (de) Vorrichtung zur steuerung von betriebsmitteln für mindestens ein elektrisches leuchtmittel und verfahren zur steuerung von betriebsmitteln für mindestens ein elektrisches leuchtmittel
EP0051299B1 (de) Prüfschaltung, insbesondere in Kraftfahrzeugen
DE3531560C2 (da)
DE2829135A1 (de) Ueberwachungseinrichtung fuer den lampenausfall bei einer flugplatzbefeuerung
DE10118189A1 (de) Verfahren und Vorrichtung zum Abfragen eines Schaltzustandes eines Schalters
DE3407066A1 (de) Verfahren zum zuschalten von lampengruppen eines gasentladungslampen-beleuchtungssystems sowie beleuchtungssystem zum durchfuehren des verfahrens
EP0662276B1 (de) Verfahren und vorrichtung zur überwachung einer glühlampe, insbesondere im dunklen zustand
DE3616506C2 (de) Verfahren und Vorrichtung zur Überwachung elektrischer Verbraucher
WO1997037425A1 (de) Anschlags- und blockiererkennung bei einem schrittmotor
EP1843645B1 (de) Schaltungsanordnung für Hochdruck-Gasentladungslampen
EP0792512B1 (de) Schützsicherheitskombination
EP0027511A1 (de) Verfahren und Schaltungsanordnung zur Inbetriebnahme der beidseitigen Fernspeisung von Zwischenstellen einer Nachrichtenübertragungsstrecke
DE4443350C1 (de) Schaltungsanordnung zur Ansteuerung und Überwachung elektrischer Lasten in einem Kraftfahrzeug
DE2658185C2 (de) Schaltungsanordnung zur Erzeugung eines Prüfstromes zwecks Prüfung von Schutzschaltern
DE3439875A1 (de) Schaltungsanordnung zur fernspeisung elektrischer verbraucher mittels wechselspannungs-parallelspeisung
DE102004055850B4 (de) Wassererhitzer, Durchlauferhitzer und Verfahren
DE2748323A1 (de) Kontrollgeraet zur ueberwachung von gluehlampen
DE1538609A1 (de) Schaltung zum Erzeugen eines konstanten Stromes durch elektrische Widerstaende unterschiedlicher Widerstandswerte
EP0125404A1 (de) Schaltung zur Fehlermeldung bei einem über eine steuerbare Schalteinrichtung geschalteten Stromverbraucher
DE3644226C2 (da)
DE3620584A1 (de) Schaltung zur ueberpruefung einer led-anzeige
DE19739537A1 (de) Einrichtung zum Ein- und Ausschalten einer elektrischen Last
DE315789C (da)
DE2653915C2 (de) "Verfahren zum selbsttätigen und manuellen Überwachen mit nachfolgender bleibender Anzeige der Funktionsbereitschaft einer Notleuchte"

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19950209

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

17Q First examination report despatched

Effective date: 19950829

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 136189

Country of ref document: AT

Date of ref document: 19960415

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: SIEMENS SCHWEIZ AG

REF Corresponds to:

Ref document number: 59302071

Country of ref document: DE

Date of ref document: 19960502

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2085171

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960514

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

ET Fr: translation filed
REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980817

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19980826

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19980909

Year of fee payment: 6

Ref country code: BE

Payment date: 19980909

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19980910

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19980911

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980916

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19980921

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 19980930

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19981117

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19981216

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990910

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990910

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990910

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990929

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990930

BERE Be: lapsed

Owner name: SIEMENS A.G.

Effective date: 19990930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990910

EUG Se: european patent has lapsed

Ref document number: 93920701.5

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000531

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20000401

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000701

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20001013

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050910