EP1294214A2 - Procédé de surveillance d' une source lumineuse dans un système de signalisation lumineuse et système de signalisation lumineuse - Google Patents

Procédé de surveillance d' une source lumineuse dans un système de signalisation lumineuse et système de signalisation lumineuse Download PDF

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Publication number
EP1294214A2
EP1294214A2 EP02020509A EP02020509A EP1294214A2 EP 1294214 A2 EP1294214 A2 EP 1294214A2 EP 02020509 A EP02020509 A EP 02020509A EP 02020509 A EP02020509 A EP 02020509A EP 1294214 A2 EP1294214 A2 EP 1294214A2
Authority
EP
European Patent Office
Prior art keywords
illuminant
value
call system
current
reference value
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Withdrawn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
EP02020509A
Other languages
German (de)
English (en)
Other versions
EP1294214A3 (fr
Inventor
Markus Linnerth
Johannes Gross
Ulf Dürr
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.)
Novar GmbH
Original Assignee
Novar GmbH
Albert Ackermann GmbH and Co KG
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 Novar GmbH, Albert Ackermann GmbH and Co KG filed Critical Novar GmbH
Publication of EP1294214A2 publication Critical patent/EP1294214A2/fr
Publication of EP1294214A3 publication Critical patent/EP1294214A3/fr
Withdrawn legal-status Critical Current

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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
    • H05B47/21—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel

Definitions

  • the invention relates to a method for monitoring the illuminant of Nurse call systems for the care sector.
  • the invention also relates to a Nurse call system for the care sector with at least one illuminant driver and at least one lamp.
  • Nurse call systems for the nursing sector serve to visually call patients to be able to represent, for example by means of so-called room signal lights, that indicate a patient's call in the hallway.
  • Lamp drivers are used for the electrical equipment of motor vehicles known that have an integrated monitoring circuit, by means of a logical signal according to the state (ok / defective) the associated lamp can be generated.
  • the monitoring circuit is for a lamp of a predetermined type at a predetermined one Installation location of the motor vehicle, for example a brake light lamp, designed.
  • Known nurse call systems for the care sector consist of flexible usable elements, and depending on the circumstances, to individual Driver modules different lamps or lamp combinations turned on.
  • Incandescent lamps are used in so-called room signal lights.
  • LEDs Light Emitting Diode
  • Incandescent lamps have a limited lifespan in relation to the number of hours that can be achieved. in the Care area can fail a room signal light that goes undetected remains, have serious consequences for the patient if Overlooking a patient call results.
  • the invention is intended to provide a method for monitoring the illuminant a nurse call system as well as a flexibly usable nurse call system Illuminant monitoring can be created.
  • an initialization phase capturing one by at least one Illuminant flowing current or a correlated size, Determination and storage of a reference value based on the recorded Value, in an operating phase, detection of the flowing through the lamp Current or a correlated variable and determining one Comparative value, comparing that determined in the initialization phase Reference value with the comparison value determined in the operating phase and evaluating the comparison result.
  • the reference value is only after installation of the nurse call system is determined and stored so that always one for the special installation situation and the special lamp type there is a meaningful reference value.
  • the reference value is automatically recorded.
  • the switched on Illuminant automatically determines and stores a reference value, until all the storage locations provided are filled with reference values are.
  • a current flowing through the lamp or lamps can be immediate be determined, it is also possible to determine one for this correlated quantity, for example a total current in a common Ground line.
  • a warning message can be sent to a network, for example output and displayed on a monitoring station.
  • aging processes in a Lamp are detected as far as they change the lamp current cause. For example, between a short circuit, a defect only one of two lamps of a lamp and one complete defect of the lamp can be distinguished.
  • the one flowing through the illuminant Current or the correlated variable in the initialization phase in switched on state and in the operating phase after each switch-on process of the illuminant detected.
  • a voltage potential is created in front and behind the lamp is detected and the detected voltage potential is taken into account when evaluating the comparison result.
  • a supply voltage is recorded and the detected supply voltage is used in determining the reference value and the comparison value.
  • the problem underlying the invention is also solved by a light call system for the care sector with at least one illuminant driver and solved at least one lamp, in the means for detecting a current flowing through the lamp or one for this correlated size, storage means for one during an initialization phase recorded reference value and means for comparing the reference value recorded during the initialization phase with a During an operating phase, the comparison value of the Illuminant flowing current or the correlated size provided are.
  • Such a light call system can be used for adaptive lamp monitoring can be realized by current measurement.
  • identical elements of the nurse call system namely illuminant drivers and monitoring circuits, can be used for different installation situations.
  • a network and at least one monitoring station connected to the network is provided, the status signal being sent to the network.
  • the nurse call system can be set up flexibly and a status signal can be selected from different monitoring stations be received.
  • the status signal can, for example from multiple monitoring stations or indicators be received.
  • Switching signals can also be sent via the network for the lamp drivers are transmitted.
  • the means for detecting the by the current flowing in the lamp or the correlated to it Size provided in a ground line of the lamp driver Current measuring resistor and a voltage measuring device.
  • the voltage measuring device has one Analog-digital converter for converting the measured voltage value on.
  • the voltage measuring device is advantageously equipped with a Microprocessor for converting the voltage value into one Current value and provided for storing the current value.
  • the voltage measuring device has a differential amplifier with low pass.
  • the measured voltage can be measured using the differential amplifier be reinforced and smoothed.
  • Such a suppression circuit serves to raise the low level of the driver during each switch-on phase of the lamps avoid. This is particularly important in the case of incandescent lamps have a high inrush current or cold current pulse.
  • the suppression circuit ensures that the low level of the driver block in the instant switch-on through the arranged in the ground line Current measuring resistor is not raised inadmissible and the logical Function of the driver is not disturbed.
  • the suppression circuit can, for example, the current measuring resistor in the switch-on phase bridge or have a voltage-limiting effect.
  • Fig. 1 is a section of a nurse call system with a Illuminant driver 10 and a lamp 12a shown.
  • the lamp 12a is arranged for example in a room signal light and is from the driver 10 turned on when it is on a data line 14 receives a command to turn on the lamp 12.
  • Such an order can, for example, be arranged on a patient's bed Go out button that is not shown in the figure.
  • lamps 12b, 12c are switched on.
  • the illuminant driver 10 is fed by means of a supply voltage V cc and is electrically connected to the lamps 12a, 12b and 12c by means of a supply line 16.
  • the lamps 12a, 12b and 12c are switched on in that the supply line 16 is connected to ground Gnd by means of the lamp driver 10.
  • the lamp driver 10 is designed as an electronic driver module and has a power transistor with upstream logic and protective circuits against short circuit, overvoltage, overtemperature, etc.
  • the lamps 12a, 12b are designed as incandescent lamps, the lamp 12c as an LED. In the combination of lamps 12a, 12b, 12c made of incandescent lamps and LEDs, the failure of each individual lamp can be recognized.
  • lamps 20a, 20b, 20c which are connected to the lamp driver 10 via a supply line 22 are actuated by means of the lamp driver 10.
  • the lamps 20a, 20b, 20c are switched on by the lamp driver 10 when it receives a corresponding signal via the data line 14.
  • the data line 14 is part of a network.
  • a current measuring resistor 24 is switched into a ground line 18 of the illuminant driver 10.
  • the voltage drop across this current measuring resistor 24 is detected by means of a voltage measuring device, which consists of a differential amplifier 25, an analog-digital converter 26 and a microprocessor 27.
  • the detected voltage value which was amplified and smoothed by the differential amplifier 25 and digitized by the analog-digital converter 26, is converted into a current value in the microprocessor 27.
  • the supply voltage V cc is expediently taken into account in the calculation of the current value, so that the calculated current value is independent of fluctuations in the supply voltage V cc .
  • one of the Lamps 12, 20 flowing through the current measuring resistor 24 Current determined as a comparison value.
  • This determined comparison value according to the switched-on state of the two lamps 12, 20, compared with an assigned stored reference value. Lies a deviation between the reference value and the comparison value within predetermined limits, the lamp driver 10 and / or the Microprocessor 27 determines that the corresponding, just turned on Lamps 12, 20 are in order. There is a deviation from the comparison value of the reference value outside certain limits, gives the Illuminant driver 10 on a data line 30 or the microprocessor 27 on a data line 31 an error message "lamp defective".
  • the data lines 30, 31 are part of a network via which the error message to suitable displays and / or monitoring workplaces is sent.
  • a Short circuit detected in the wiring of a lamp This is particularly so important with optional additional lights that last longer Wiring can be connected.
  • the lamp driver 10 In addition to the error message "lamp defective", the lamp driver 10 if the comparison value differs from the reference value, but the Deviation is within two predetermined limits, a warning message from which a change in the by the lamps 12a, 12b, 12c or 20a, 20b, 20c indicates flowing current. Such a change can, for example, by aging the lamps 12a, 12b, 12c or 20a, 20b, 20c and may terminate one early failure.
  • the illuminant driver 10 in one If a warning message is issued, a lamp can already be installed a failure can be replaced as a precaution.
  • Incandescent lamps used when switching on a high inrush current or have a cold current pulse.
  • a suppression circuit 32 is in parallel switched to the current measuring resistor 24.
  • the suppression circuit 32 will raise the low level of the lamp driver 10 limited in the switch-on phase, for example by means of zener diodes in the suppression circuit 32.
  • the suppression circuit 32 controlled by the light source driver 10 via a data line and bridges the current measuring resistor in the switch-on phase 24th
  • the differential amplifier 25 is in more detail shown.
  • the external circuitry of the operational amplifier acts as Low pass and leads to a smoothing of the current measuring resistor 24 tapped voltage signal.
  • the smoothed and amplified voltage signal is then passed to the analog-to-digital converter 26.

Landscapes

  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
EP02020509A 2001-09-17 2002-09-13 Procédé de surveillance d' une source lumineuse dans un système de signalisation lumineuse et système de signalisation lumineuse Withdrawn EP1294214A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10146191 2001-09-17
DE10146191A DE10146191A1 (de) 2001-09-17 2001-09-17 Verfahren zur Leuchtmittelüberwachung von Lichtrufsystemen und Lichtrufsystem

Publications (2)

Publication Number Publication Date
EP1294214A2 true EP1294214A2 (fr) 2003-03-19
EP1294214A3 EP1294214A3 (fr) 2005-02-16

Family

ID=7699560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02020509A Withdrawn EP1294214A3 (fr) 2001-09-17 2002-09-13 Procédé de surveillance d' une source lumineuse dans un système de signalisation lumineuse et système de signalisation lumineuse

Country Status (2)

Country Link
EP (1) EP1294214A3 (fr)
DE (1) DE10146191A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102036444A (zh) * 2010-10-15 2011-04-27 深圳市中庆微科技开发有限公司 一种led灯点电流故障排除的方法和装置
CN110451377A (zh) * 2018-05-07 2019-11-15 广州广日电梯工业有限公司 电梯的点阵外召的监控方法及监控装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4398417B2 (ja) * 2005-10-19 2010-01-13 株式会社小糸製作所 車両用灯具の点灯制御装置
JP4457312B2 (ja) 2006-01-12 2010-04-28 株式会社デンソー 車両用ヘッドランプ装置
DE102007012913A1 (de) * 2007-03-19 2008-09-25 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Überwachungseinheit zum Erkennen einer defekten Anhängerbeleuchtung

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DE2251881B2 (de) * 1972-10-23 1979-05-10 Westfaelische Metall Industrie Kg, Hueck & Co, 4780 Lippstadt Einrichtung zur Überwachung von parallelgeschalteten elektrischen Verbrauchern, insbesondere in Kraftfahrzeugen
JPH0629116Y2 (ja) * 1985-04-12 1994-08-10 株式会社東海理化電機製作所 ランプの断線検出装置
DE3616506C2 (de) * 1986-05-16 1995-11-30 Hella Kg Hueck & Co Verfahren und Vorrichtung zur Überwachung elektrischer Verbraucher
FR2681754B1 (fr) * 1991-09-23 1993-12-24 Electricite De France Installation d'eclairage electrique et procede de commande et de surveillance de ladite installation.
KR0157936B1 (ko) * 1995-03-04 1999-03-20 이희종 교통 신호 제어기의 전구 단선 검출 방법 및 장치
DE29520661U1 (de) * 1995-12-29 1996-03-28 HELICOM Entwicklungsgesellschaft für Telekommunikation und Medientechnik mbH, 48291 Telgte Lichtrufanlage mit LED's
FR2746943A1 (fr) * 1996-03-26 1997-10-03 Electric System Dispositif d'appel a distance a validation
DE19649371C1 (de) * 1996-11-28 1998-04-02 Siemens Ag Verfahren und Schaltungsanordnung zur zentralen Überwachung, Steuerung und Regelung einer großen Anzahl von Glüh- oder Halogenlampen in Feuern
DE19818621A1 (de) * 1998-04-25 1999-10-28 Mannesmann Vdo Ag Schaltungsanordnung zur Einstellung der Helligkeit stromgesteuerter Leuchtdioden zur Beleuchtung einer Anzeige
DE19905709A1 (de) * 1999-02-11 2000-08-31 Siemens Ag Verfahren zum Erkennen eines Lampenausfalls und Lampenausfalldetektionsvorrichtung

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None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102036444A (zh) * 2010-10-15 2011-04-27 深圳市中庆微科技开发有限公司 一种led灯点电流故障排除的方法和装置
CN102036444B (zh) * 2010-10-15 2014-12-03 深圳市中庆微科技开发有限公司 一种led灯点电流故障排除的方法和装置
CN110451377A (zh) * 2018-05-07 2019-11-15 广州广日电梯工业有限公司 电梯的点阵外召的监控方法及监控装置

Also Published As

Publication number Publication date
EP1294214A3 (fr) 2005-02-16
DE10146191A1 (de) 2003-04-10

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