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WO2014095176A1 - Procédé et système de contrôle fonctionnel de dispositifs d'éclairage - Google Patents

Procédé et système de contrôle fonctionnel de dispositifs d'éclairage Download PDF

Info

Publication number
WO2014095176A1
WO2014095176A1 PCT/EP2013/073852 EP2013073852W WO2014095176A1 WO 2014095176 A1 WO2014095176 A1 WO 2014095176A1 EP 2013073852 W EP2013073852 W EP 2013073852W WO 2014095176 A1 WO2014095176 A1 WO 2014095176A1
Authority
WO
WIPO (PCT)
Prior art keywords
brightness
light
lighting means
sensor
arrangement
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.)
Ceased
Application number
PCT/EP2013/073852
Other languages
German (de)
English (en)
Inventor
Norbert Kollmann
Maximilian Austerer
Martin Roth
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of WO2014095176A1 publication Critical patent/WO2014095176A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/0214—Constructional arrangements for removing stray light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J2001/4247—Photometry, e.g. photographic exposure meter using electric radiation detectors for testing lamps or other light sources
    • G01J2001/4252—Photometry, e.g. photographic exposure meter using electric radiation detectors for testing lamps or other light sources for testing LED's
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/26—Testing of individual semiconductor devices
    • G01R31/2607—Circuits therefor
    • G01R31/2632—Circuits therefor for testing diodes
    • G01R31/2635—Testing light-emitting diodes, laser diodes or photodiodes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/44—Testing lamps

Definitions

  • the invention relates to a method and a device for functional testing of an arrangement of light sources, which are subdivided into at least two independently controllable groups, with at least one sensor, with a control unit for controlling an array of light sources to be checked.
  • the invention relates to the functional ⁇ verification of LED arrays in the automotive sector.
  • Illuminant arrangements with a multiplicity of light sources, some of which are independent of each other, can be used for adaptive headlamp systems, for example of vehicles. Often these are LED array Anord ⁇ voltages of a plurality of individually addressable LEDs.
  • the illumination geometry can be variably adjusted, for example, to a driving situation. This is of particular interest in the automotive sector in order to integrate various lighting functions, such as daytime running lights, dipped headlights, cornering lights and cornering lights, in a headlight design, although the individual functions are still flexibly adjustable.
  • each light means or each LED a separate sensor which is optically connected to the LED via a light transmission path during the functional test, i.
  • the sensor is positioned in conjunction with a light transmission path so that the light of a single light source is detected.
  • the disadvantage here is the complex in production and maintenance testing device, especially in a large number of bulbs.
  • the positioning of the lamp assembly relative to the light transmission paths must be so to be precise, that in case of malfunction of a light source of the associated sensor is not the light of an adjacent
  • the light-emitting groups are controlled sequentially and while a temporal course of the outgoing light from several lamps brightness is measured, which is compared with an expected brightness curve, with a deviation of the brightness curve (ie Measured time course of the outgoing light from several bulbs) a malfunction is signaled.
  • the measured brightness curve at each measuring point can be compared with the expected brightness curve.
  • the brightness measurements are carried out at different times, so that the measured values are independent of one another and mutual influences can be ruled out.
  • the sequential measurement allows use of a sensor for a plurality of bulbs of the same arrangement.
  • the test device both with the sensor and with the control unit, an evaluation unit for monitoring the time course of outgoing brightness of several bulbs connected, the sensor as a common sensor for measuring the brightness of several sequentially controlled lighting means is directed ⁇ .
  • the structure of the test device is thus simplified compared to known devices, since the same number of light sources, a smaller number of sensors is required, ie, the number of sensors is advantageously less than the number of lamps of a device to be tested.
  • Experiencing the test can be advantageously further simplified if the lamps are divided into groups whose expected brightness is substantially equal. The expected course of the measured brightness is particularly simple in this case; For verification it is possible for each group the measured
  • Triggering the transitions between the groups are synchronized so that the expected time course of the brightness is substantially uniform or time constant, an otherwise necessary synchronization between the control of the lamps and measurement or evaluation of the brightness can be omitted, and it is sufficient to synchronize the beginning and the end of a measurement sequence. Since the sequential measurements follow one another directly, the speed of the entire measurement can be improved or the duration of the entire check can be reduced.
  • a particularly simple measurement and evaluation can be achieved if the lighting means are individually controllable and each sequentially driven group has only one light source.
  • the bulbs are advantageously individually driven and thus lit at the review to each
  • a malfunction of a light ⁇ means is detected by means of a temporary loss of light in the course of the measured brightness.
  • the light intensity does not have to be measured or evaluated in this case.
  • a group with a faulty luminous means can be identified on the basis of the time of the deviation in the time course of the measured brightness. For such identification, the brightness profile must be compared with the sequence and the duration of the driving of the lighting means.
  • the group with the defective illuminant is the group that was driven at the time of the deviation. For example, instead of discarding the complete arrangement or rechecking all groups manually, only the faulty group can be replaced.
  • the brightness emanating from the entire arrangement is measured with a single sensor.
  • the positioning of the lamp arrangement is easy to accomplish in this case, since a faulty association between the lamp and the sensor is excluded.
  • the evaluation unit can in this case be integrated directly with the sensor, as a connection with several sensors is not required.
  • the present method for checking the function is particularly advantageous when the lighting means are light-emitting diodes (LEDs), the arrangement being in particular an LED matrix.
  • LEDs light-emitting diodes
  • ⁇ such arrangements, a large number of light sources can be realized in a small space, so that an assignment of each light source to a separate sensor would be particularly difficult.
  • a sequential check according to the present method allows this exact results and large savings in terms of the sensors and simplifies the necessary adjustment for the adjustment to a minimum.
  • a conical, opaque screen can be provided which extends from a sensor to an edge of the illuminant arrangement.
  • Figure 1 is a perspective view of a test device with a test specimen.
  • Fig. 2 is a schematic block diagram of a horrein ⁇ direction with an inspected lamp positioning.
  • a test device 1 with a detector 2 and a shield 3 is shown.
  • the detector 2 has a single sensor 4, which is set up to measure the brightness within the shield 3.
  • the shield 3 is in ⁇ game as a truncated pyramid with a generally rectangular base 5, wherein the shield to the base and parallel opposing cut surface 6 has an opening.
  • the detector 2 is arranged on the narrower upper side 7 of the shield 3 and forms an opaque termination with an edge of the cut surface 6.
  • Adjacent to a wide base 8 of the shielding 3 9 is arranged in the form of an LED array Mo ⁇ duls 10 is a lighting means arrangement to be tested.
  • the LED matrix module 10 is oriented so that its lighting means or LEDs 11 are arranged on a side facing the scholarein ⁇ direction 1.
  • the LEDs 11 are individually controllable (see Fig. 2).
  • the surface 12, over which the LEDs 11 are distributed, is smaller than or equal to the base 5 of the shield 3.
  • the shield 3 can be brought to the LED matrix module 10 so that the environment no light, especially no stray light on which detector 2 can penetrate.
  • FIG. 2 shows a schematic block diagram of the electrical Part of the test device 1 for carrying out the present method, which is connected to a device under test, that is, a lamp assembly 9 to be checked.
  • the device under test 9, which may be for example, an LED array module 10 includes at least one strand 13 in series ge ⁇ switched LEDs. 11
  • the strand 13 is connected to a constant current source 14, which provides a current adapted to supply the LEDs 11.
  • the LEDs 11 are individually controllable by a switch 15 is connected in parallel to each LED 11 to the bridging. When the switch 15 is closed, the current flows due to the significantly lower resistance of the switch 15 in wesent ⁇ union exclusively via the switch 15 and the associated LED 11 remains dark. It can be seen directly from FIG.
  • LED groups each having a plurality of LEDs, with a switch 15 for bridging a group, ie all LEDs of the group, being able to be set up. In this case, not all LEDs would be individually controllable; the present method could then be applied at least to the groups.
  • the groups could include series and / or parallel circuits of LEDs 11.
  • the switches 15 are connected to a drive unit 16 which controls the position of the switches 15. Between the drive unit 16 and the individual switches 15 are
  • the dently ⁇ approximation unit 16 has a clock which allows the sequential control of the individual LEDs 11 by opening at regular time intervals in each case precisely one of the switches 15 and thus the associated LED is activated. 11
  • the opening of a switch 15 is synchronized with the simultaneous closing ⁇ SEN of another, previously open switch 15 so that a light flux or brightness of light emanating from the LEDs 11 light remains substantially unchanged and has a uniform gradient. It is at the transitions from one LED 11 to the next to the precise timing Value.
  • the LEDs 11 are arranged in a viewing area of a sensor 4, which is part of a detector 2 (see FIG.
  • the sensor 4 is set up to measure the brightness of the light emitted by the LEDs 11.
  • a Auswer ⁇ teech 18 is connected.
  • the sensor 4 transmits the brightness values measured during a function check or the time profile of the measured brightness to the evaluation unit 18. In the case of a synchronized sequential
  • the control unit 16 also transmits a timing of the control of the individual LEDs 11 with the information at what time which LED (s) 11 are or were active, to the evaluation unit 18.
  • the timing of the control can also from the evaluation unit 18th predetermined and optionally confirmed by the drive unit 16. It is obvious to the person skilled in the art, both in connection with the sensor 4 and with the control unit 16, that the transmission of the data to the evaluation unit 18 can take place either in real time during the functional test or at the end of the functional test.
  • the evaluation unit 18 On the basis of the transmitted sequence (the activation) and the course (the brightness), the evaluation unit 18 identifies any incorrect functions of one or more LEDs 11 of the strand 13. With individual control of the LEDs 11, recognition is based on a qualitative, bivalent evaluation of the sensor signal: should If one of the LEDs does not work, then the detector or the evaluation unit detects a (short) interruption of the light and can evaluate this as an error of the LED matrix. About the time of the light interruption can be with knowledge of the sequence 0
  • the drive the faulty LED 11 are identified.
  • the measured brightness in the evaluation unit 18 is quantitatively compared with a predefined setpoint value or a preset minimum brightness, and when the brightness drops, the group active at the time of the intrusion is recognized as having an error.
  • the evaluation unit 18 transmits the assigned Identifi ⁇ cation information to a display or output unit 19.
  • the display or output unit 19 signals the detected malfunction ⁇ function, so that following the function check, for example, an exchange or a repair of the faulty LED matrix module 10 can be made.
  • the light guide at least partially collects the light of all LEDs regardless of a geometrical arrangement of the LEDs with each other and / or with respect to the sensor and passes the collected light to the sensor 4, which can thus monitor or check all the LEDs.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

L'invention concerne un procédé et un système (1) de contrôle fonctionnel d'un agencement (9) de dispositifs d'éclairage (11) répartis en au moins deux groupes commandables indépendamment. Les groupes sont commandés séquentiellement et, pendant ce temps, on détermine une courbe en fonction du temps de la luminosité produite par plusieurs dispositifs d'éclairage (11) et on la compare avec une courbe de luminosité attendue. Un écart de la courbe de luminosité entraîne la signalisation d'un dysfonctionnement.
PCT/EP2013/073852 2012-12-21 2013-11-14 Procédé et système de contrôle fonctionnel de dispositifs d'éclairage Ceased WO2014095176A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012224323.2 2012-12-21
DE102012224323.2A DE102012224323B4 (de) 2012-12-21 2012-12-21 Verfahren und Einrichtung zur Funktionsprüfung von Leuchtmitteln

Publications (1)

Publication Number Publication Date
WO2014095176A1 true WO2014095176A1 (fr) 2014-06-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/073852 Ceased WO2014095176A1 (fr) 2012-12-21 2013-11-14 Procédé et système de contrôle fonctionnel de dispositifs d'éclairage

Country Status (2)

Country Link
DE (1) DE102012224323B4 (fr)
WO (1) WO2014095176A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104965181A (zh) * 2015-07-09 2015-10-07 儒拉玛特自动化技术（合肥）有限公司 一种基于光敏传感器的车灯led灯光检测机构
US20170234727A1 (en) * 2016-02-16 2017-08-17 Feasa Enterprises Limited Method and Apparatus for Testing Optical Outputs
WO2017181507A1 (fr) * 2016-04-19 2017-10-26 深圳Tcl数字技术有限公司 Procédé, dispositif et système de détection de dégradation de luminance de barre de lumière
GB2551016A (en) * 2016-04-19 2017-12-06 Leviton Manufacturing Co Brightness monitoring for LED failures and daylighting target adjusting

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104296973A (zh) * 2014-09-12 2015-01-21 昆山博文照明科技有限公司 汽车led前照灯配光检测装置
CN104360292B (zh) * 2014-12-08 2017-09-19 昆山精讯电子技术有限公司 Led灯条光电性检测机构
DE102019109123A1 (de) * 2019-04-08 2020-10-08 HELLA GmbH & Co. KGaA Beleuchtungsvorrichtung für ein Kraftfahrzeug, Verfahren zur Überprüfung der Funktionsfähigkeit einer Mehrzahl von Lichtquellen einer Beleuchtungsvorrichtung und Verfahren zum Betrieb einer Beleuchtungsvorrichtung
DE102020104959A1 (de) 2020-02-26 2021-08-26 HELLA GmbH & Co. KGaA Verfahren und Vorrichtung zur automatisierten Detektion einer Beeinträchtigung einer Lichtabstrahlung bei einer Beleuchtungsvorrichtung für ein Fahrzeug
DE102023106878A1 (de) * 2023-03-20 2024-09-26 HELLA GmbH & Co. KGaA Prüfverfahren für Scheinwerfer sowie Testvorrichtung
DE102023208521A1 (de) 2023-09-05 2025-03-06 Siemens Mobility GmbH Funktionsüberwachung eines Signalbilds

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US4775640A (en) * 1987-05-01 1988-10-04 American Telephone And Telegraph Company Electronic device test method and apparatus
US6384612B2 (en) * 1998-10-07 2002-05-07 Agere Systems Guardian Corporation Method and apparatus for testing the light output of light emitting devices
US20110267087A1 (en) * 2010-04-28 2011-11-03 Taiwan Semiconductor Manufacturing Company, Ltd. Apparatus and method for wafer level classification of light emitting device

Family Cites Families (2)

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DE202004006019U1 (de) 2004-04-16 2004-06-09 GPS Prüftechnik mbH Testvorrichtung für lichtemittierende Dioden
DE102011076133A1 (de) 2011-05-19 2012-11-22 Robert Bosch Gmbh Prüfvorrichtung für eine Kamera sowie ein Verfahren zur Prüfung einer Kamera

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US4775640A (en) * 1987-05-01 1988-10-04 American Telephone And Telegraph Company Electronic device test method and apparatus
US6384612B2 (en) * 1998-10-07 2002-05-07 Agere Systems Guardian Corporation Method and apparatus for testing the light output of light emitting devices
US20110267087A1 (en) * 2010-04-28 2011-11-03 Taiwan Semiconductor Manufacturing Company, Ltd. Apparatus and method for wafer level classification of light emitting device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104965181A (zh) * 2015-07-09 2015-10-07 儒拉玛特自动化技术（合肥）有限公司 一种基于光敏传感器的车灯led灯光检测机构
US20170234727A1 (en) * 2016-02-16 2017-08-17 Feasa Enterprises Limited Method and Apparatus for Testing Optical Outputs
GB2547428A (en) * 2016-02-16 2017-08-23 Feasa Entpr Ltd Method and apparatus for testing optical outputs
US11067437B2 (en) 2016-02-16 2021-07-20 Feasa Enterprises Umsted Method and apparatus for testing optical outputs
WO2017181507A1 (fr) * 2016-04-19 2017-10-26 深圳Tcl数字技术有限公司 Procédé, dispositif et système de détection de dégradation de luminance de barre de lumière
GB2551016A (en) * 2016-04-19 2017-12-06 Leviton Manufacturing Co Brightness monitoring for LED failures and daylighting target adjusting
GB2551016B (en) * 2016-04-19 2021-10-20 Leviton Manufacturing Co Brightness monitoring for LED failures and daylighting target adjusting

Also Published As

Publication number Publication date
DE102012224323A1 (de) 2014-06-26
DE102012224323B4 (de) 2019-07-25

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