WO2016008989A1 - Détection de circuits d'attaque de lampe par le biais d'impulsions de courant - Google Patents

Détection de circuits d'attaque de lampe par le biais d'impulsions de courant Download PDF

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Publication number
WO2016008989A1
WO2016008989A1 PCT/EP2015/066295 EP2015066295W WO2016008989A1 WO 2016008989 A1 WO2016008989 A1 WO 2016008989A1 EP 2015066295 W EP2015066295 W EP 2015066295W WO 2016008989 A1 WO2016008989 A1 WO 2016008989A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
lamp drivers
time
drivers
code signal
Prior art date
Application number
PCT/EP2015/066295
Other languages
English (en)
Inventor
Willem Peter Van Der Brug
Original Assignee
Koninklijke Philips N.V.
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 Koninklijke Philips N.V. filed Critical Koninklijke Philips N.V.
Publication of WO2016008989A1 publication Critical patent/WO2016008989A1/fr

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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
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/185—Controlling the light source by remote control via power line carrier transmission
    • 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
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/198—Grouping of control procedures or address assignation to light sources
    • H05B47/199—Commissioning of light sources
    • 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
    • H05B47/22—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel with communication between the lamps and a central unit

Definitions

  • the invention relates to a device for detecting lamp drivers.
  • the invention further relates to a lamp driver for driving a lamp, to a lamp, to a system, to a method, to a computer program product and to a medium.
  • Examples of such a lamp driver are lamp drivers connected to a feeding cable.
  • Examples of such a lamp are circuits comprising a light emitting diode and a lamp driver.
  • US 2003 / 0160703 discloses a fault diagnosis circuit for a LED indicating light.
  • a pulse generating circuit produces a pulse, and an automatic selection switch provides the pulse to one of multiple stages, each stage comprising a plurality of LEDs.
  • the pulse is a short time pulse such that the turning on of a stage is unperceivable.
  • This fault diagnosis circuit works fine in case each stage can be addressed individually. But, in a street lamp environment, usually the street lamps cannot be addressed individually.
  • a device for detecting lamp drivers, the device comprising:
  • a generator for generating a trigger signal, the trigger signal defining a code signal to be transmitted to the lamp drivers, each one of the lamp drivers being configured to, in response to a reception of the code signal, draw a current pulse at a random moment in time situated within a first time-interval from a feeding cable connected to the lamp drivers, a detector for detecting current pulses flowing through the feeding cable and for producing a detection result per detected current pulse, and a counter for counting a number of detection results during the first time- interval and for producing a counting result, the counting result being indicative for a first number of lamp drivers, the first number of lamp drivers being the lamp drivers that have responded to the code signal.
  • a generator generates a trigger signal.
  • the trigger signal defines a code signal to be transmitted to the lamp drivers.
  • Each one of the lamp drivers draws, in response to a reception of the code signal, a current pulse at a random moment in time situated within a first time-interval from a feeding cable connected to the lamp drivers.
  • a detector detects current pulses flowing through the feeding cable and produces a detection result per detected current pulse.
  • a counter counts a number of detection results during the first time-interval and produces a counting result. The counting result is indicative for a first number of lamp drivers, that have responded to the code signal.
  • the current pulse is a short time pulse such that the turning on of a combination of a lamp driver and a lamp is unperceivable.
  • the device allows lamp drivers to be detected during the day when the lamps are switched off. During the night, lamp drivers can be detected by monitoring a total amount of power consumed by the lamp drivers and their lamps, as for example disclosed in FR 2 688 067 and US 8 451 005. Further, the device can detect lamp drivers controlled via code signals in unidirectional communication systems, and introduces a return path to such unidirectional communication systems.
  • each current pulse having a duration equal to a second time-interval, a product of the second time-interval and a second number of lamp drivers being smaller than the first time-interval, the second number of lamp drivers being a total number of lamp drivers that should have responded to the code signal.
  • a product of firstly a duration of each current pulse equal to a second time- interval and secondly a second number of lamp drivers equal to a total number of lamp drivers that should have responded to the code signal is at least twice as small as the first time-interval, more preferably at least five times as small, most preferably at least ten times as small.
  • An embodiment of the device is defined by the detector being configured to produce a first detection result in response to a detection of a first current pulse having a first amplitude equal to or smaller than a threshold and to produce a second detection result in response to a detection of a second current pulse having a second amplitude larger than the threshold, and the counter being arranged to count the first detection result as one detection result and to count the second detection result as two or more detection results.
  • the detector being configured to produce a first detection result in response to a detection of a first current pulse having a first amplitude equal to or smaller than a threshold and to produce a second detection result in response to a detection of a second current pulse having a second amplitude larger than the threshold, and the counter being arranged to count the first detection result as one detection result and to count the second detection result as two or more detection results.
  • One way to deal with this is to let the detector distinguish between first current pulses having expected amplitudes equal to or smaller than a threshold and second current pulses having unexpectedly higher amplitudes larger than the threshold and to let the counter react to that.
  • Another way to deal with this is to accept that some current pulses might not be distinguishable from each other and to define that a first number of lamp drivers that have responded to the code signal is ok when being equal to at least a percentage such as for example 90% or 95% of the second number of lamp drivers that should have responded to the code signal.
  • the counting result is indicative for the first number of lamp drivers that have responded to the code signal but does not necessarily need to be identical to this first number of lamp drivers.
  • An embodiment of the device is defined by the trigger signal defining a code signal to be transmitted to the lamp drivers non-individually.
  • the code signal is sent to all the lamp drivers.
  • the code signal is transmitted to a string of lamps (e.g., street lamps) in a broadcast/multiple cast way.
  • a networking technology of the string of lamps may use CSMA/CD (Carrier Sense Multiple Access with Collision Detection).
  • US 4 449 073 discloses a fault monitor for a runway approach lighting system wherein each light can be individually addressed. Such individually addressing makes a system more complex and more expensive.
  • An embodiment of the device is defined by further comprising: a sender for in response to the trigger signal sending the code signal to the lamp drivers via the feeding cable.
  • the device is responsible for sending the code signal via the feeding cable to the lamp drivers.
  • An embodiment of the device is defined by the sender comprising a transformer for modulating an amplitude of a voltage present on the feeding cable.
  • the sender comprising a transformer for modulating an amplitude of a voltage present on the feeding cable.
  • An embodiment of the device is defined by the trigger signal defining a code signal to be transmitted to the lamp drivers wirelessly. According to a second possibility, the device triggers an internal or external transmitter for transmitting the code signal to the lamp drivers wirelessly.
  • a lamp driver for driving a lamp, the lamp driver comprising:
  • a receiver for receiving a code signal and for producing a reception result, and - a converter to be connected to a feeding cable for in response to the reception result drawing a current pulse at a random moment in time situated within a first time- interval from the feeding cable.
  • the current pulse has a duration equal to a second time-interval, and preferably the second time-interval is relatively short such that the energy of the current pulse can be stored inside the lamp driver, for example in a capacitor, without lighting a light source coupled to the lamp driver.
  • the light source for example comprises one or more light emitting diodes.
  • An embodiment of the lamp driver is defined by the receiver being configured to detect a modulation of an amplitude of a voltage present on the feeding cable.
  • An embodiment of the lamp driver is defined by the receiver being configured to receive the code signal wirelessly.
  • a lamp comprising the lamp driver as defined above.
  • the lamp may further comprise a light source such as for example one or more light emitting diodes.
  • a system comprising the device as defined above and comprising at least one of the lamp driver as defined above and the lamp as defined above and further comprising the feeding cable.
  • a method for detecting lamp drivers comprising:
  • a first step of generating a trigger signal the trigger signal defining a code signal to be transmitted to the lamp drivers, each one of the lamp drivers being configured to, in response to a reception of the code signal, draw a current pulse at a random moment in time situated within a first time-interval from a feeding cable connected to the lamp drivers, a second step of detecting current pulses flowing through the feeding cable and of producing a detection result per detected current pulse, and
  • a computer program product for, when run on a computer, performing the steps of the method as defined above.
  • a medium for storing and comprising the computer program product as defined above.
  • lamp drivers cannot be addressed individually.
  • a basic idea is that lamp drivers should draw current pulses at random moments in time from a feeding cable, and that these current pulses on the feeding cable should be detected and counted.
  • a problem to provide an improved device has been solved.
  • a further advantage is that a return path is introduced for a unidirectional communication system.
  • Fig. 1 shows a first embodiment of a device
  • Fig. 2 shows a second embodiment of a device
  • Fig. 3 shows a first embodiment of a lamp driver
  • Fig. 4 shows a second embodiment of a lamp driver
  • Fig. 5 shows a system
  • Fig. 6 shows current pulses
  • Fig. 7 shows a third embodiment of a device
  • Fig. 8 shows a fourth embodiment of a device.
  • a first embodiment of a device 1 wherein the device 1 comprises a detector 12 for detecting current pulses flowing through a feeding cable 3 and for producing a detection result per detected current pulse. Thereto, the detector 12 is coupled to the feeding cable 3 in a resistive, inductive and/or capacitive manner. Each current pulse is drawn by a lamp driver 2 shown in and discussed for the Fig. 3 and 4.
  • the device 1 further comprises a counter 13 for counting a number of detection results during a first time-interval and for producing a counting result. The counting result is indicative for a first number of lamp drivers 2 that have responded to a code signal.
  • the device 1 further comprises a generator 1 1 for generating a trigger signal.
  • the trigger signal defines the code signal to be transmitted to the lamp drivers 2 shown in and discussed for the Fig. 3 and 4.
  • Each one of the lamp drivers 2 will, in response to a reception of the code signal, draw a current pulse at a random moment in time situated within the first time-interval from the feeding cable 3.
  • the device 1 can detect presences of the lamp drivers 2 and/or connections of the lamp drivers 2 to the feeding cable 3 and/or functionalities of the lamp drivers 2 and/or (parts of) the feeding cable 3 etc.
  • the device 1 further comprises a sender 14 for in response to the trigger signal sending the code signal to the lamp drivers 2 via the feeding cable 3.
  • the sender 14 is coupled to the feeding cable 3 in a resistive, inductive and/or capacitive manner.
  • the device 1 further comprises a controller 16 coupled to the detector 12, the counter 13, the generator 1 1 and a man-machine- interface 17.
  • the detector 12 and the counter 13 are coupled to each other, and the generator 1 1 is coupled to the sender 14.
  • the sender 14 may for example comprise a transformer 15 as shown in and discussed for the Fig. 7 and 8, without having excluded other kinds of senders.
  • the man- machine-interface 17 may be used to manually control the device 1 and to produce an alert.
  • a second embodiment of a device 1 that differs from the first embodiment in that the sender 14 has been replaced by a transmitter 18 that may be an internal transmitter of the device 1 or an external transmitter coupled to the device 1.
  • the transmitter 18 is coupled to the generator 1 1 and transmits the code signal to the lamp drivers 2 in a wireless way indicated by an arrow 31.
  • a first embodiment of a lamp driver 2 wherein the lamp driver 2 comprises a receiver 21 for receiving the code signal and for producing a reception result. Thereto, the receiver 21 is coupled to the feeding cable 3 in a resistive, inductive and/or capacitive manner.
  • the lamp driver 2 further comprises a converter 22 connected to the feeding cable 3 and to a lamp 4 for in response to the reception result drawing the current pulse at a random moment in time situated within the first time-interval from the feeding cable 3.
  • the lamp driver 2 further comprises a controller 26 coupled to the receiver 21 and the converter 22.
  • the receiver 21 may for example be configured to detect a modulation of an amplitude of a voltage present on the feeding cable 3, without having excluded other kinds of receivers.
  • a second embodiment of a lamp driver 2 is shown, that differs from the first embodiment in that the receiver 21 is configured to receive the code signal from the transmitter 18 in a wireless way indicated by the arrow 31.
  • the system comprises the device 1 connected to the feeding cable 3.
  • the feeding cable 3 is connected to lamps 4 such as street lamps fed via the feeding cable 3.
  • the detector 12 is configured to produce a first detection result in response to a detection of a first current pulse having a first amplitude equal to or smaller than the threshold and to produce a second detection result in response to a detection of a second current pulse having a second amplitude larger than the threshold.
  • the counter 13 may then be arranged to count the first detection result as one detection result and to count the second detection result as two detection results (in case the second amplitude is substantially twice as large as the first amplitude) or as three detection results (in case the second amplitude is substantially thrice as large as the first amplitude) etc.
  • each current pulse may have a duration equal to a second time- interval, whereby a product of the second time-interval and a second number of lamp drivers 2 should be smaller than the first time-interval, preferably much smaller, with this second number of lamp drivers 2 being a total number of lamp drivers 2 that should have responded to the code signal.
  • this second number of lamp drivers 2 being a total number of lamp drivers 2 that should have responded to the code signal.
  • Another way to deal with this is to accept that some current pulses might not be distinguishable from each other and to define that a first number of lamp drivers 2 that have responded to the code signal is ok when being equal to at least a percentage such as for example 90% or 95% of the second number of lamp drivers that should have responded to the code signal.
  • a third embodiment of a device 1 wherein the device 1 comprises a sender in the form of a transformer 15.
  • a first winding of the transformer 15 interrupts a first conductor of the feeding cable 3, and both sides of a second winding of this transformer 15 are via four switches either connected to the first conductor or to a second conductor of the feeding cable 3.
  • the device 1 further comprises a processing circuit 10 that controls the four switches and that monitors a voltage difference present across a resistor 41 that also interrupts the first conductor. This voltage difference will be representative for and show the current pulses.
  • a source will be present for producing an AC voltage or a DC voltage, and right from the transformer 15 many lamp drivers 2 and lamps 4 will be present, all not shown here.
  • the source will feed the lamp drivers 2 and the lamps 4.
  • the source only needs to be switched on during the first time-interval to feed the detector 12 and the counter 13 in the device 1 and the lamp drivers 2 and shortly before the first time-interval to feed the generator 1 1 in the device 1 and possibly the sender 14 in the device 1 or possibly the transmitter 18 in or near the device 1.
  • a fourth embodiment of a device 1 that differs from the third embodiment in that the resistor 41 has been replaced by a current transformer 42 as for example disclosed in US 5 168 198.
  • This current transformer 42 will show the current pulses to the processing circuit 10 too.
  • the processing circuit 10 such as a microcontroller with inbuilt analog-to-digital-converter may comprise the generator 1 1, the detector 12 and the counter 13, with the four switches being an interface between the processing circuit 10 and the transformer 15.
  • the four switches may be considered to form the generator 1 1, with the processing circuit 10 comprising the detector 12 and the counter 13.
  • the resistor 41 and the current transformer 42 may be considered to be an internal or external part of the detector 12, with the processing circuit 10 comprising the other part of the detector 12 and the counter 13.
  • the resistor 41 and the current transformer 42 may be considered to be the detector 12, with the processing circuit 10 comprising the counter 13 etc.
  • the generator 1 1, the detector 12 and the counter 13 may be partly or entirely form part of the controller 16, or vice versa, the controller 16 may partly or entirely form part of one or more of the generator 11, the detector 12 and the counter 13.
  • the controller 16 may further be used for adjusting a detecting way in the detector 12 (for example by defining a threshold), for adjusting a counting way in the counter 13 (for example by defining how to count current pulses having different amplitudes), and for adjusting a generating way in the generator 1 1 (for example by defining which code signal is to be transmitted).
  • the receiver 21 and the converter 22 may be partly or entirely form part of the controller 26, or vice versa, the controller 26 may partly or entirely form part of one or more of the receiver 21 and the converter 22.
  • the lamp 4 is coupled to the lamp driver 2, but alternatively the lamp 4 may comprise the lamp driver 2.
  • the feeding cable 3 is shown in the Fig. 1-4 and 7-8 with two conductors, alternatively the feeding cable 3 may have only one conductor in case a good earth / ground connection is present. In the Fig. 5, the feeding cable 3 is shown with only one conductor, alternatively this feeding cable 3 may have two conductors etc.
  • the first time-interval may for example be equal to 60 seconds
  • the second time-interval may for example be equal to 20 msec
  • the code signal may for example instruct each lamp driver 2 to consume 10% of the maximum power during the second time- interval situated arbitrarily within the first time-interval.
  • the second number of lamp drivers may for example be equal to 50.
  • a voltage present on the feeding cable may for example be 100 or 200 Volt, with a modulation depth being 1 or 2 Volt. All this, without having excluded other values.
  • First and second elements may be coupled directly without a third element being in between and may be coupled indirectly via the third element.
  • devices 1 for detecting lamp drivers 2 comprise generators 1 1 for generating trigger signals defining code signals to be transmitted to the lamp drivers 2 that in response draw current pulses at random moments in time within first time-intervals from feeding cables 3, detectors 12 for detecting the current pulses flowing through the feeding cables 3 and for producing detection results, and counters 13 for counting numbers of detection results during the first time-intervals and for producing counting results indicative for first numbers of lamp drivers 2 that have responded to the code signals.
  • the code signals may be transmitted to the lamp drivers 2 non-individually, via the feeding cables 3 or wirelessly.
  • Lamp drivers 2 comprise receivers 21 for receiving the code signals and for producing reception results, and converters 22 for in response drawing the current pulses at the random moments in time within the first time-intervals from the feeding cables 3.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

L'invention concerne des dispositifs (1) destinés à détecter des circuits d'attaque de lampe (2), lesquels dispositifs comprennent des générateurs (11) pour générer des signaux de déclenchement définissant des signaux de code à émettre pour les circuits d'attaque de lampe (2) qui en réponse absorbent, à des instants aléatoires dans des premiers intervalles de temps, des impulsions de courant en provenance de câbles d'alimentation (3), des détecteurs (12) pour détecter les impulsions de courant circulant dans les câbles d'alimentation (3) et pour produire des résultats de détection, et des compteurs (13) pour compter les nombres de résultats de détection pendant les premiers intervalles de temps et pour produire des résultats de comptage indicatifs de premiers nombres de circuits d'attaque de lampe (2) qui ont répondu aux signaux de code. Les signaux de code peut être émis vers les circuits d'attaque de lampe (2) d'une manière non individuelle, par l'intermédiaire des câbles d'alimentation (3) ou sans fil. Les circuits d'attaque de lampe (2) comprennent des récepteurs (21) pour recevoir les signaux de code et pour produire des résultats de réception, et des convertisseurs (22) pour en réponse absorber, aux instants aléatoires dans les premiers intervalles de temps, les impulsions de courant en provenance des câbles d'alimentation (3).
PCT/EP2015/066295 2014-07-17 2015-07-16 Détection de circuits d'attaque de lampe par le biais d'impulsions de courant WO2016008989A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14177371 2014-07-17
EP14177371.3 2014-07-17

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WO2016008989A1 true WO2016008989A1 (fr) 2016-01-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11553578B2 (en) 2018-07-10 2023-01-10 Signify Holding B.V. Light device and a lighting system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120068618A1 (en) * 2010-09-16 2012-03-22 Koski John A Communication with lighting units over a power bus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120068618A1 (en) * 2010-09-16 2012-03-22 Koski John A Communication with lighting units over a power bus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11553578B2 (en) 2018-07-10 2023-01-10 Signify Holding B.V. Light device and a lighting system

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