EP3235349A1 - Helligkeitsregelung einer lichtsignalanlage - Google Patents
Helligkeitsregelung einer lichtsignalanlageInfo
- Publication number
- EP3235349A1 EP3235349A1 EP16702356.3A EP16702356A EP3235349A1 EP 3235349 A1 EP3235349 A1 EP 3235349A1 EP 16702356 A EP16702356 A EP 16702356A EP 3235349 A1 EP3235349 A1 EP 3235349A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- unit
- modulation
- voltage
- brightness
- 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.)
- Granted
Links
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
Definitions
- Brightness control of a traffic signal system The invention relates to a circuit arrangement for adjusting the brightness of signal transmitters of a traffic signal system. In addition, the invention relates to a traffic signal system. Furthermore, the invention relates to a method for adjusting the brightness of a traffic signal system.
- Traffic light systems also called LichtZeichenstrom
- LichtZeichenstrom are used to control road traffic. Arrange for transport ⁇ subscriber to a particular behavior by controlled light signals are emitted. These traffic signs, which differ in shape and color, each have a different meaning and radiate only counter to the direction of travel of the traffic to be regulated.
- the use of traffic signal systems has different reasons, for example to improve the traffic flow and to defuse dangerous or dangerous traffic situations. In road traffic these are in particular junctions as well as bottlenecks, eg at construction sites or bridges. Depending on the change in the prevailing light conditions in the region of the respective traffic signal system, the light signals displayed by the traffic signal system can be recognized better or worse.
- the brightness of the signal ⁇ encoder of the traffic signal Nit to the respective light conditions adapt.
- the brightness of the signal ⁇ encoder of the traffic signal Nit to the respective light conditions adapt.
- the dimming of traffic signal systems has been achieved in that the voltage with which the signal generator were operated, could be varied by the controller in one or more stages.
- Typical operating voltages are for example 230V for full brightness and 150V for reduced brightness.
- bulbs for the signal generator such an approach is particularly easy to implement, since the bulbs automatically darken at low voltage.
- the brightness of light-emitting diodes depends on the current intensity of the electrical current flowing through them.
- an additional LED driver logic must be installed, which detects the lower supply voltage and reduces the current through the light-emitting diodes, so that the light output decreases.
- the dimming is implemented centrally by different supply voltages for different Hellig ⁇ possibilities of auto switches conventional.
- the voltage supply unit of the traffic signal at least one additional transformer or more power supplies are installed and it is switched between the voltages of different voltage converter to obtain different supply voltages ⁇ for different brightnesses.
- the circuit arrangement according to the invention for adjusting the brightness of signal transmitters of a traffic signal system has a voltage supply interface for receiving an electrical supply voltage.
- the voltage supply interface can be, for example, a power connection for a supply voltage, such as a 230V AC voltage.
- the circuit arrangement according to the invention also has a voltage conversion unit for generating a carrier signal by converting the electrical supply voltage into an electrical voltage of a carrier signal.
- a voltage conversion unit is a unit understood ⁇ to which converts an electrical voltage in an electrical voltage having a different voltage value or a different voltage.
- an AC voltage with a specific voltage value can be converted into an AC voltage having a different voltage value or an AC voltage is converted into a DC voltage, or vice versa.
- the circuit arrangement according to the invention further comprises a control data receiving unit for receiving a
- Control signal the control signal summarizes information regarding a brightness of the traffic signal system to be set ⁇ .
- the circuit arrangement according to the invention has to a modulation signal generating unit for generating ei ⁇ Nes modulation signal in response to the received control signal.
- the modulation signal generating unit with the control data receiving unit is electrically connected to or includes the control data receiving unit to receive the control signal from the Steuerungsda ⁇ th receiving unit and to generate a modulation signal in response to the detected control command.
- the circuit arrangement according to the invention also comprises a modulator unit for modulating the carrier signal with the Mo ⁇ dulationssignal to a modulated control signal for controlling the brightness of the signal transmitter.
- the modu ⁇ latorü is electrically connected to the modulation unit to receive the modulation signal therefrom.
- the modulator unit is also electrically connected, at least indirectly, to the voltage conversion unit in order to receive therefrom the carrier signal, which is converted in the modulator unit together with the modulation signal into a control signal.
- the aim is to include all types of units that can combine two signals together in such a way that the two signals are broken down again in their outputs Kings ⁇ nen the term modulator unit.
- the modulator unit should also be able to be a switch, which is controlled by the modulation signal and modulates the carrier signal by this switching process.
- a signaling device in connection with the circuit arrangement according to the invention is to be understood as a unit which outputs a signal which can be detected by external devices or persons, such as road users, and interpreted with regard to information relevant to them.
- the signal of a signal generator comprises an instruction or a warning, which can be understood or further processed by the persons or devices concerned.
- Circuit arrangements in which the control of the signal generator takes place with the aid of a plurality of transformers or voltage transformers saves at least part of these cost-intensive and space-consuming components.
- the traffic signal system comprises the circuit arrangement according to the invention for adjusting the brightness of signal transmitters of a traffic signal system.
- the erfindungsge ⁇ Permitted circuitry has a signaling device having a plurality of signal generators, each signal generator having a demodulation unit which is adapted to receive a modulated signal from the circuit ⁇ arrangement and to demodulate in a modulation signal and a carrier signal.
- the signal generators are thus designed as so-called intelligent signal generator, which he ⁇ possible, via a modulation of the supply voltage digital telegrams or states of the controller, ie the circuit arrangement according to the invention to send to the signal generator.
- the intelligent controller in the signal generator regulates the light output.
- Part of the intelligent signal generator is also a demodulator, which analyzes the modulated signal received by the controller such that the information contained regarding the brightness of the signal generator can be detected and further processed by the signal generators.
- the light system according to the invention also includes a signal transmitter switching unit which is connected between the scarf ⁇ processing arrangement and the signal generation means and is adapted to switch between different signal ⁇ donors.
- the individual signalers are warning lights with different meanings.
- the signaling switch unit is now to switch between the various warning lights to issue various warning information or instructions.
- a control signal are received, ⁇ gene, wherein the control signal comprises an adjusted brightness of the light signal system.
- a Josig ⁇ nal is generated by converting a supply voltage to an elec- generic voltage of a carrier signal.
- a modulation signal is generated as a function of the received control ⁇ signal and the carrier signal modulated with the modulation signal to a modulated control signal for controlling the brightness of the signal generator.
- the essential components of the circuit arrangement according to the invention for adjusting the brightness of signal transmitters of a traffic signal system can be designed predominantly in the form of software components. This concerns in particular the modulation signal generation unit and the Mo ⁇ dulator unit. In principle, however, these components may also partly, particularly when it comes to very fast loading ⁇ bills, in the form of software-supported hardware such as FPGAs or the like to be realized.
- the required interfaces for example, be when it's all about a takeover of data from other Softwarekompo ⁇ components, designed as a software interface can. However, they can also be configured as hardware-based interfaces, which are controlled by suitable software.
- a largely software-based implementation has the advantage that even previously used circuit arrangements for adjusting the brightness of signal transmitters of a Lichtsignal- anläge in a simple manner by a software update nachge ⁇ can be retrofitted to work in the inventive way.
- the task is also solved by a computer program product, which is stored directly in a memory direction of a traffic signal system is loadable, with Programmab ⁇ cut to perform all the steps of the method according to the invention, when the program is executed in the traffic signal system.
- the circuit arrangement according to the invention preferably has an additional switch between the voltage conversion unit and the modulator unit.
- the additional switch can serve to connect and disconnect the circuit arrangement from the supply voltage or the carrier voltage.
- the modulation signal generation unit is set up to generate a sinusoidal signal as a modulation signal.
- a sine signal can be used, for example, for frequency modulation of a carrier signal.
- the information to be transmitted is contained in the modulated frequency of the carrier signal.
- the sinusoidal signal may have a frequency of 1 kHz for setting a normal brightness and a frequency of 2 kHz for a weaker brightness.
- the frequencies are in principle freely selectable, are in practice usually in the order of 100 Hz to 10 kHz ma ⁇ ximal.
- the frequency deviation, ie the difference between the two modulation frequencies, can also be selected as desired.
- the correct demodulation in the signal generator with small NEM frequency stroke consuming, so that a sufficient frequency deviation is preferred.
- the modulation is not limited to sine or rectangle functions. Equally well, a signal with a triangular shape, a sawtooth shape, or any other arbitrary waveform could be used.
- the modulation signal generating unit may be configured to generate a square wave signal as a modulation signal.
- the modulator unit is controlled such that for setting a normal Hellig ⁇ ness no square-wave signal is modulated and a schisse ⁇ chere brightness modulation of the electric voltage of the signal generator with a square wave with a frequency of 1 kHz is carried out.
- the modulation can be tion device controlled such that it outputs a non-zero signal to the Modulatorein ⁇ integrated only during the time periods during which the brightness is dimmed.
- the modulator unit is designed as a simple switch.
- the switch can be realized eg as a commercially available high-side switch (from the Smart High Side Switch family from Infineon).
- the switch is driven with the aid of the modulation signal of the modu ⁇ lationshim and switched according to the amplitude of the modulation signal.
- a square wave signal with the frequency of the modulation signal and the amplitude of the carrier signal can be generated as a control signal for controlling the signal generator.
- the circuit arrangement according to the invention is the voltage conversion unit configured to transform the supply voltage into a DC electrical voltage of a carrier signal.
- the carrier signal to be modulated is in this case as
- the inventive circuit arrangement can have a setting amplitude swing, which is to be ⁇ directed to adjust an amplitude of the modulated control signal.
- a setting amplitude swing which is to be ⁇ directed to adjust an amplitude of the modulated control signal.
- the amplitude stroke adjusting unit may, for example, a Dio ⁇ denumble or a longitudinal regulator having, which bridges the modulator unit.
- the components of the amplitude stroke setting unit of the modulator ⁇ unit which is in particular designed as a simple switch, connected in parallel, so that even in the phase in which the switch blocks, a signal at the output of the circuit arrangement according to the invention, the amplitude of which depends on the impedance of the components of the amplitude-stroke adjustment unit.
- the circuit arrangement according to the invention may also have a clock control unit in a particularly energy-saving variant which is adapted to determine a pulse duty ratio ⁇ with which the carrier signal with the modulation signal is modulated tion.
- the circuit arrangement also includes a signal multiplication unit or a mixer unit which is adapted to mix a signal generated from the clock control unit clock signal with the Modulati ⁇ onssignal to multiply in particular.
- the duty cycle of the clock signal determines the length of time for which the carrier signal is modulated. For example, it may be sufficient to modulate the carrier signal only for a subinterval of each time slot or a system time interval.
- This time interval may be, for example, a system time interval or a time slot.
- a specific time slot is a fixed time interval, which is repeated within the framework of the period of the system time.
- FIG. 3 shows a light signal system with a circuit arrangement according to an embodiment of OF INVENTION ⁇ dung
- FIG. 4 shows a circuit arrangement according to an embodiment of the invention for generating a frequency-modulated signal
- FIG. 5 shows a circuit arrangement according to an embodiment of the invention for generating a rectangular-modulated signal
- FIG. 6 shows a circuit arrangement according to an exemplary embodiment of the invention with a simple switch as modulator
- FIG. 7 shows the circuit arrangement of FIG. 6 with an additional bridging element for setting an amplitude deviation of the modulated signal
- 8 shows a circuit arrangement according to an embodiment of the invention, which is optimized in terms of power loss and interference emission
- FIG. 9 shows the time profile of a drive signal, which was generated by the circuit arrangement of FIG. 8, FIG.
- FIG. 10 is a flowchart illustrating a method for adjusting the brightness of a traffic signal system according to an embodiment of the invention.
- FIG. 1 shows a conventional dimmable traffic signal system 20 with a dimming transformer 6.
- the traffic signal system 20 comprises a voltage supply circuit 1, which serves to provide a supply voltage V supp suitable for a specific brightness of a signal transmitter.
- the traffic signal system 20 comprises a lamp switching device 2, which serves to switch between different signal transmitters of a signal generator unit 3. For example, environmentally summarizes the switch unit 3 a signal transmitter 3a for red light, a transducer 3b for yellow light and a Sig ⁇ nalgeber 3c for green light.
- the voltage supply circuit 1 comprises a voltage supply interface 15, which serves as a connection to a voltage supply line 4, for example with a supply voltage of 230V.
- a voltage supply line 4 for example with a supply voltage of 230V.
- the dimming transformer 6 transforms the voltage V supp, which is applied at its input 6a, from, for example, 230V into a dimmed signal voltage V s i g . If necessary, the signal voltage V s i g applied to the output 6 b is switched by a first signal voltage changeover switch 8 to a signal line 7 between the voltage supply circuit 1 and the lamp switching device 2.
- the first signal voltage change selschalter 8 is switched to passage when a signal ⁇ encoder of the signal generator unit 3 with a reduced Hellig ⁇ speed should shine.
- a second signal voltage changeover switch 9 is also connected between the supply voltage line 4 and the signal line 7, which is switched to passage in the event that no dimming function is desired.
- the two signal voltage changeover switches 8, 9 are switched alternately. For example, if the first signal voltage change switch 8 is turned on, the second signal voltage change switch 9 is disabled and vice versa. In this way, two different Sig ⁇ nalpressiveen V S i g and fro can be switched between.
- the lamp switching device 2 has according to the number of signal generators 3a, 3b, 3b of a signal generator unit 3 three Lam ⁇ penschalter 10, 11, 12, with which a signal voltage V s i g on one of the signal generator 3a, 3b, 3b can be switched. It is also possible to switch the signal voltage V s i g to several signal generator at the same time, if several signalers should light up at the same time. This is the case, for example, in the preparation phase for a release of a passage through the traffic signal system 20, ie, for example, at the transition from the red phase to the green phase. As already he imagines ⁇ , the conventional dimmable light system 20 requires an additional dimming transformer 6, which has an increased footprint and brings relatively high costs. Furthermore, FIG. 1 also shows a neutral conductor N between the signal generator unit 3 and the voltage supply interface 15.
- the traffic signal system 30 shown in FIG. 2 shows a conventional traffic signal system 30 with an alternative power supply circuit 1 is shown.
- the traffic signal system 30 shown in FIG. like the traffic signal system 20 shown in FIG. 1, has a lamp switching device 2 and a signal transmitter unit 3.
- the clamping ⁇ voltage supply circuit 1 of the alternative light signal system 30 comprises, instead of the shown in Figure 1 dimming transformer's 6 two parallel-connected voltage transformers 13, 14, which may be formed, for example, as so-called switching power supplies ⁇ .
- a first voltage converter 13 converts a supply voltage V supp of 230 V into a DC voltage of 18 volts
- a second voltage converter 14 connected in parallel with the first voltage converter 13 converts the supply voltage V supp from 230 V into a DC voltage of 24 volts.
- a signal voltage changeover switch 8, 9 is connected, which can switch one of the two DC voltages to the signal voltage line 7 respectively. If the lower signal voltage V S i g of 18 V is applied to the signal transmitters 3 a, 3 b, 3 c, then the brightness of the corresponding signal generator 3 a, 3 b, 3 c is reduced. Is located on the signal transmitters 3a, 3b, 3c, a signal voltage V ⁇ S ig of 24V, so the respective ⁇ be controlled signal generator is lit with full brightness.
- a neutral conductor N between the signal generator unit 3 and the power supply interface 15 is also shown in FIG.
- a traffic signal system 40 is shown with a circuit ⁇ arrangement 41 according to an embodiment of the invention.
- the light signal system 40 in FIG 3 comprises similarly to the light signal systems shown in Figures 2 and 3, 20, 30 a power supply circuit 41 which a Sig ⁇ serves to provide for a specific brightness of a nalgebers suitable supply voltage or Signalspannnug V S ig.
- the light signal system 40 comprises a lamp switching device 42, which serves to switch between different signal transmitters of a signal generator unit 43.
- the light signal 40 has ⁇ system shown in FIG 3 has a signal transmitter unit 43rd
- the signal transmitter unit 43 includes a signal generator 43a for red light, a signal generator 43b for yellow light and a signal generator 43c for green light.
- the Lam ⁇ penschalt sexual 42 shown in FIG 3 has a similar structure as the corresponding shown in FIG 1 and FIG 2 units, in particular
- the lamp switching device 42 shown in FIG. 3 also comprises three lamp switches 10, 11, 12 with which a signal MOD can be switched to one of the signal transmitters 3a, 3b, 3b.
- the signal transmitters shown in Figure 3 was prepared standardized 43 is also a in the Figures 1 and 2 ge Service ⁇ th signal transmitter units of similar construction.
- the signalers shown in FIG. 3 are so-called intelligent signal transmitters. These intelligent signal transmitters make it possible to transmit digital telegrams or states from the controller, ie the circuit arrangement according to the invention, to the signal transmitters via a modulation of the supply voltage or signal voltage.
- an intelligent controller in the signal generator regulates the light output.
- Part of an Intel gent signal generator is also a demodulator (not ge ⁇ shows), which analyzes the signal received from the power supply circuit modulated signal such that the ent ⁇ retaining information, the brightness of the signal ge ⁇ over can be detected by the signal transmitters and processed further on.
- Power supply circuit 41 according to an embodiment of the invention differs significantly from the conventional in Figures 1 and 2 shown power supply circuits. 1
- the power supply circuit 41 shown in FIG 3 comprises a modulation signal generating unit 44, which is there to ⁇ arranged to generate a modulation signal MD.
- the modulation signal MD contains control information, which is evaluated by the signal generator unit 43 and interpreted as a control command.
- the modulation signal generating unit 44 is connected elekt ⁇ driven with a modulator unit 45th
- the modulator unit 45 is over a
- Switch 8 is connected to a voltage converter unit 14, which converts a supply voltage of 230V into a carrier signal voltage V S i g of 24 volts DC. If the modulator unit 45 is activated and the switch 8 is turned on connected let, is modulated onto the carrier signal V s i g a signal generated by the modulation signal generating unit 44 modulation ⁇ signal MD. Be in modulating various ⁇ dene method, such as frequency modulation or amplitude modulation or a rectangular modulation, can be used (as already written above, all waveforms are possible). 41 In addition, the circuit arrangement to a control data receiving unit 46 for receiving a Steuersig ⁇ Nals. In this embodiment, the control data receiving unit 46 is part of the modulator unit 45.
- the control signal S comprising information relating to a discontinuing brightness of the illuminated signal unit 40, that is, the Mo ⁇ dulationssignal MD is generated in response to a Steuersig ⁇ nal S.
- the modulated signal MOD is then forwarded via the lamp switch unit 42 to one of the signal transmitters 43a, 43b, 43c of the signal transmitter unit 43.
- Each of the signal generators 43a, 43b, 43c preferably includes a signal processor with egg nem demodulator (not shown) which the received signal MOD modu ⁇ profiled divides again in the modulation signal MD with the control information and the carrier signal SIG.
- the signal processor of the respective signal transmitter 43a, 43b, 43c sets on the basis of in the control signal S or modulation-onssignal MD contained control commands to a current through was ⁇ ne light unit or to the light-emitting unit of the signal ge ⁇ bers 43a, 43b, 43c voltage applied the command value. In this way, a multistage or even con ⁇ continuous dimming of the brightness of the signal generator 43a, 43b, 43c done.
- a neutral conductor N between the signal generator unit 43 and the voltage supply interface 15 is shown in FIG.
- FIG 4 shows a circuit arrangement 41, according to an execution example of the invention, approximately with the main elements shown that the modulation signal generating unit 44, the Modula ⁇ gate unit 45 and the switch 8 is increased.
- the modulation signal generating unit 44 the Modula ⁇ gate unit 45 and the switch 8 is increased.
- the modulation signal generating unit 44 uses the principle of frequency modulation.
- the modulation signal generating unit 44 generates a sine ⁇ signal depending on whether the switches are to light up (not ge ⁇ shows) with full brightness or to glow with verrin- Gerter brightness, comprises a different Fre acid sequence.
- the frequency of the modulation signal MD is set for normal Hel ⁇ ltechnik to 1kHz and Festge for dimming to 2 kHz shall ⁇ .
- the modulation signal MD generated by the modulation signal generation unit 44 is sent to the modulator unit 45 where it is modulated onto a carrier signal SIG, so that a modulated signal MOD is generated.
- the carrier signal SIG is illustrated in FIG. 4 at the top left in a diagram as a voltage signal with the DC voltage V s i g , which is constant over time t.
- the modulated signal MOD is also shown as a voltage signal as a function of time.
- the frequency of the modulated signal MOD is 1 kHz. That is, a control command is communicated that the signalers are to illuminate with full brightness NH.
- the frequency of the modulated signal MOD is changed to 2 kHz.
- a control command is transmitted with the modulated signal MOD, that the signal generator with diminished brightness Dim should shine, so be dimmed.
- FIG. 5 shows a circuit arrangement 41a according to an alternative embodiment of the invention with the most important elements, ie a modulation signal generating unit 44, a modulator unit 45 and a switch 8 shown enlarged.
- the modulation signal generating unit 44 generates a square wave signal having a fixed frequency and pulse width .
- the switches are to shine at full brightness when ⁇ ness is output from the modulation signal Erzeu ⁇ supply unit 44 a signal.
- the signalers are to be illuminated with reduced brightness is inputted from the modulation signal generation unit 44
- Rectangular signal generated as a modulation signal MD is generated as a modulation signal MD.
- the frequency of the rectangular modulation signal MD is placed firmly ⁇ for dimming to 1 kHz.
- the rectangular modulation signal MD generated by the modulation signal generation unit 44 is sent to the modulator unit 45 where it is modulated onto a carrier signal SIG, so that a modulated signal MOD is generated.
- the carrier signal SIG is in the Figure 5 top left in a diagram as a voltage signal to the voltage V S G i as a function of time t ⁇ veran illustrated. It is formed as a constant DC voltage signal from ⁇ .
- the modulated signal MOD is flat ⁇ case shows, as a voltage signal in dependence on time ge ⁇ .
- the Fre acid sequence of the modulated signal MOD is 1 kHz, and the signal has a rectangular modulation of the amplitude. That is, a control command is communicated that the signalers should dim dim with diminished brightness.
- the modulated signal MOD is changed so that only the constant carrier signal SIG is transmitted.
- a control command is sent that the signalers are to illuminate with full brightness NH.
- the rectangular modulation by the modulator 45 in the embodiment in FIG 5 corresponds to an addition of the modulation signal MD to the carrier signal SIG. That is to say, a rectangular signal MD alternating between a positive and a negative value is added to a constant carrier signal SIG.
- FIG. 6 a circuit arrangement 41b according to a further alternative exemplary embodiment of the invention with the most important elements, ie a modulation signal generation unit 44 and a switch 8, is shown enlarged.
- the arrangement in FIG. 6 is simplified to the effect that the modulator unit 45 shown in FIG. 5 is omitted, and instead only one switch 8 is formed.
- the switch 8 provides a switchable electrical connection between the voltage converter unit 14 (see FIG 3) and the line 7 to the lamp switch unit 42.
- the control of the switch 8 takes place in the example shown in FIG 6 embodiment by the modulation signal generating unit 44.
- the modulation ⁇ signal Generating unit 44 in turn generates a Facultyecksig ⁇ nal with a fixed frequency and pulse width. In the event that the signalers are to illuminate at full brightness, no signal is output by the modulation signal generation unit 44. Thus, the switch remains to 8 ge passage ⁇ switches and as a control signal MOD the constant carrier ⁇ signal SIG is output. In the event that the signalers are to be illuminated with a reduced brightness, also referred to as dimming or dimming, a square-wave signal is output by the modulation signal generating unit 44. The switch 8 is now driven by the square wave signal which causes the switch to change between on state and open state.
- the modulated signal MOD has an amplitude corresponding to the amplitude of the carrier signal SIG. However, if the switch 8 is open, no signal is applied to the line to the voltage converter unit 14 and the amplitude of the modu ⁇ lated signal MOD is 0.
- the carrier ⁇ signal SIG is illustrated in FIG 6 in the top left in a diagram as a voltage signal to the voltage V as a function of time t. It is designed as a constant DC clamping ⁇ voltage signal.
- Top right of the FIG 6, to modulated signal MOD is also shown as a voltage signal in depen ⁇ dependence on the time.
- the frequency of the modulated signal MOD is 1 kHz and the signal has a rectangular shape. That is, it a control command is sent to make the dim light dim indicators dim.
- the modulated signal MOD is changed so that now only the constant carrier signal SIG is transmitted, ie, the switch 8 is now permanently switched through. In this state to a ⁇ Steuerungsbe ⁇ failed is transmitted, that the switches are to shine at full brightness NH with the modulated signal MOD.
- the principle of the rectangular modulation is used just as in the exemplary embodiment shown in FIG. 6 for modulation.
- the arrangement in FIG 7 is the same as the arrangement shown in FIG 6 to the effect ⁇ be considered that the modulation of the carrier signal SIG is realized by turning control of the switch.
- the switch 8 provides a switchable electrical connection between the voltage converter unit 14 (see FIG 3) and the line 7 to the lamp switch unit 42.
- the control of the scarf ⁇ ters 8 is performed by a supply unit of the modulation signal Erzeu- 44 generated modulation signal MD.
- the structure of the circuit arrangement 41c shown in FIG. 7 corresponds to the structure in FIG. 6.
- the circuit arrangement 41c also comprises an amplitude stroke setting unit 47.
- the amplitude stroke setting unit can have, for example, a diode path or be designed as a longitudinal regulator. It bridges the switch 8 and is turned on to this parallel ge ⁇ .
- the amplitude swing setting unit 47 works in that a corresponding voltage drops AU depending on the set resistance of the Ampli ⁇ tudenhub setting unit 47 on the plane formed by the amplitude swing setting unit 47 Brü ⁇ blocks via the switch. 8 Is the switch 8 on
- the modulation signal generation unit 44 again generates a square wave signal having a fixed frequency and pulse width.
- the switch remains switched through 8 on passage and as the control signal MOD the constant carrier ⁇ signal SIG is output.
- the signal generator with a reduced brightness also referred to as dimming or dimming state to shine
- a square wave signal is output from the modulation ⁇ signal generating unit 44, a square wave signal.
- the switch 8 is now driven with the square wave signal, which causes the switch 8 between Naturallasszu ⁇ state and open state changes.
- the modulated signal MOD has an amplitude corresponding to the amplitude of the carrier signal SIG. However, if the switch 8 is opened, a signal reduced by the voltage AU is applied to the line 7 to the lamp switch unit 42 and the amplitude of the modulated signal MOD is V S i g -AU.
- the frequency of the rectangular modulation signal MD for dimming is set to 1 kHz.
- the carrier signal SIG is illustrated in FIG. 7 at the top left in a diagram as a voltage signal with the voltage V as a function of the time t. It is designed as a constant DC voltage signal. At the top right in FIG.
- the modulated signal MOD is likewise shown as a voltage signal as a function of time.
- the frequency of the modulated signal MOD is 1 kHz and the modulated signal MOD has a rectangular shape, wherein the minimum amplitude Litude of the electrical voltage of the modulated signal MOD V S ig -AU and the maximum amplitude is V s i g . That is, it is transmitted to a control command that will light up signal ge ⁇ over with reduced brightness Dim.
- the modulated signal MOD is changed so that now only the constant carrier signal SIG is transmitted, ie the switch 8 is now permanently switched through.
- a control command is transmitted with the modulated signal MOD or the carrier signal SIG, that the signalers are to light up with full brightness NH.
- the modulation stroke By adjusting the modulation stroke, the immunity to interference and the efficiency of the circuit arrangement can be influenced. If a large amplitude deviation AU is selected, the interference immunity increases or an improved signal-to-noise ratio is achieved. However, in connection with this measure, the efficiency of the circuit decreases. However, one chooses a lower amplitude swing AU, the efficiency is improving ⁇ sert is for a lower immunity is accepted in this case.
- FIG. 8 shows a circuit arrangement 41d according to a further alternative embodiment of the invention with the most important elements, ie a modulation signal generating unit 44, a clock control unit 48, a mixing unit 49, a switch 8 and a Amplitudeshub- setting unit 47, shown enlarged.
- the principle of the rectangular modulation is used just as in the exemplary embodiment shown in FIG. 7 for modulation.
- the arrangement in FIG 8 is the same as the arrangement shown in FIG 7 to the effect ⁇ be considered that the modulation of the carrier signal SIG by turning control of the switch is implemented.
- the switch 8 represents a switchable electrical connection between the voltage converter unit 14 (see FIG. 3) and the line 7 to the lamp switch unit 42 (see FIG. 3).
- the circuit arrangement 41d shown in FIG. 8 encompasses the same as the circuit arrangement shown in FIG 41c is an amplitude stroke adjusting unit 47.
- the amplitude stroke adjusting unit 47 standardized 47 may be formed for example as a diode path or as longitudinal ⁇ regulator. It bridges the switch 8 or is connected in parallel with it.
- the function of the Amplitu ⁇ denhub setting unit 47 is already explained in the description of FIG 7, so that reference is made at this point.
- the control of the switch 8 is carried out as well as in the embodiment of FIG 7 using a Modulati ⁇ onssignals MD.
- the modulation signal MD 41d by mixing such as Mul ⁇ tiplizieren
- the signal generated by the modulation signal generating unit 44 signal MD to a clock control signal TKT pro- prises which is generated by the clock control unit 48.
- the two signals MD, TKT be ge ⁇ mixed in a mixer unit 49 that is for example multiplied, to give a mixed modulation signal MMD results, with which the switch is controlled.
- the clock control unit 48 prescribes the duty cycle between the system time t sys and a modulation time t moc i in the event of a decrease in the brightness of the signal generator.
- the duty cycle corresponding clock signal TKT is shown at the bottom left in a diagram in FIG.
- the clock signal CLK is referred to as square-wave signal with the modulation time t i moc in time intervals t ⁇ Sy s generated.
- the modulation signal generation unit 44 in turn generates a square-wave signal MD with a fixed frequency and pulse width. This signal is shown above the porthole ⁇ image for the clock signal to the left in FIG.
- the switch 8 In the event that the Sig ⁇ nalgeber are lit with full brightness, no signal from the modulation signal generating unit 44 is madege ⁇ ben. Thus, the switch 8 remains switched to passage and as a control signal MOD, the constant carrier signal SIG ⁇ is given. In the event that the signalers are to be illuminated with reduced brightness, also referred to as dimming or dimming, then the modulation signal generating means unit 44 a rectangular signal MD output.
- the Israelecksig ⁇ nal MD is mixed in the mixing unit 49 with the timing control signal CLK from the clock control unit 48, wherein a mixture ⁇ tes MMD modulation signal is generated.
- the switch 8 is now driven with the mixed modulation signal MMD, which causes the switch 8 only during the Modula ⁇ tion time Trao d between the on state and switches to open ⁇ stand. If the switch 8 is on passage, the modulated signal MOD has an amplitude corresponding to the amplitude of the carrier signal SIG. If the switch 8 opens, however ge ⁇ , reduced by the voltage AU signal is applied to the line to the air switch unit 42 (see FIG 3) and the amplitude of the modulated signal MOD is V s i g -AU. In the concrete example shown in FIG. 8, the frequency of the rectangular modulation signal MD for dimming is set to 1 kHz.
- the carrier signal SIG is illustrated in FIG.
- the modulated signal MOD is also shown as a voltage signal in ⁇ a function of time.
- the frequency of the mo ⁇ dul convinced signal MOD is 1 kHz and the modulated signal MOD has a rectangular shape, wherein the minimum amplitude of the modulated signal MOD V s i g -AU is and the maximum amplitude is V s i g . That is, a control command is communicated that the signalers should dim dim with diminished brightness.
- the modulated signal MOD is now changed on the basis of the modulation time t moc i determined by the clock control unit such that only the constant carrier signal SIG is transmitted, ie the switch 8 is now permanently switched through. Due to the festgeleg ⁇ th system time t sys, which is greater than the modulation time t m0d, however, from the driven to the signal transmitter
- the advantage of the clock-controlled modulation is that the power loss is limited and thus the efficiency of the circuit 41d can be favorably influenced.
- the power loss P v of the circuit 41d is given by where I S ig is the current strength corresponding to the re-modulated carrier signal SIG, AU is the amplitude swing, t sys is the system clock at which the signal transmitters receive signals, and t moc i is the aforementioned modulation time.
- FIG. 9 shows a diagram for illustrating the relationship between the modulated control signal MOD, which is plotted in the diagram in the upper area as a function of time, and the current I v flowing through the lighting units of the signal generators.
- a circuit arrangement 41d according to the exemplary embodiment shown in FIG. 8 serves as the voltage supply circuit.
- the length of time slots ent ⁇ speaks in this case, the system time t sys.
- the signal transmitter regulates the current I v by the lighting unit, such as an LED down so that energy can be saved and a dazzling effect of Ver ⁇ Kehr is avoided.
- the carrier signal SIG is not modulated in this case, which of the signal transmitter as Be ⁇ fail to illuminate is interpreted with full brightness, so that the current I v through the lighting units is maximum.
- a method 100 for adjusting the brightness of a traffic signal system 40 is illustrated in a flowchart.
- a control signal S is received, which includes information relating to a brightness of the traffic signal system 40 to be set.
- the control signal S can come, for example, from an external device, such as a traffic control center.
- a carrier signal SIG is also generated continuously by converting ei ⁇ ner present at the voltage supply interface electrical supply voltage V supp into an electrical carrier signal voltage V s i g .
- the carrier signal SIG is used to transport the control information to a signal encoder 43 of the light signal system 40.
- a modulation signal III MD function of the genes are received, ⁇ control signal S is generated.
- the Carrier signal SIG for the signal generator 43 with the modulation ⁇ signal MD modulated to a modulated control signal MOD the Carrier signal SIG for the signal generator 43 with the modulation ⁇ signal MD modulated to a modulated control signal MOD.
- the invention is not limited to the application in a traffic signal system or to an application in the field of traffic, but the invention can also be applied in principle to other signaling systems, such as acoustic systems and for other purposes, such as warning systems or the like. It is also pointed completeness ⁇ reported executed that the use of the indefinite article does not exclude “a” or “an” means that the features in question can also be present more than once. Likewise, the term “unit” does not exclude that it consists of several Components ⁇ th, which may also be spatially distributed if necessary.
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015203118 | 2015-02-20 | ||
| PCT/EP2016/051291 WO2016131605A1 (de) | 2015-02-20 | 2016-01-22 | Helligkeitsregelung einer lichtsignalanlage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3235349A1 true EP3235349A1 (de) | 2017-10-25 |
| EP3235349B1 EP3235349B1 (de) | 2021-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| EP16702356.3A Active EP3235349B1 (de) | 2015-02-20 | 2016-01-22 | Helligkeitsregelung einer lichtsignalanlage |
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| Country | Link |
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| EP (1) | EP3235349B1 (de) |
| WO (1) | WO2016131605A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110198584B (zh) * | 2019-06-24 | 2024-08-06 | 山东中大电源科技有限公司 | 一种单向电力载波led调光系统 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10163958A1 (de) * | 2001-12-23 | 2003-07-03 | Der Kluth Decke Und Licht Gmbh | Beleuchtungsvorrichtung |
| WO2004038962A1 (ja) * | 2002-10-24 | 2004-05-06 | Nakagawa Laboratories, Inc. | 照明光通信装置 |
| US8896216B2 (en) * | 2005-06-28 | 2014-11-25 | Seoul Viosys Co., Ltd. | Illumination system |
| US8110835B2 (en) * | 2007-04-19 | 2012-02-07 | Luminus Devices, Inc. | Switching device integrated with light emitting device |
| DE102007047847B4 (de) * | 2007-11-22 | 2018-02-22 | Swarco Traffic Systems Gmbh | Verkehrssignalanlage mit Signalgebern und einer Steuereinrichtung zum Steuern von Leuchten in den Signalgebern |
| US8344659B2 (en) * | 2009-11-06 | 2013-01-01 | Neofocal Systems, Inc. | System and method for lighting power and control system |
| DE102009047654A1 (de) * | 2009-12-08 | 2011-06-09 | Tridonic Ag | Steuerbare Retrofit LED-Lampen |
| EP2466996A3 (de) * | 2010-12-16 | 2015-04-15 | CP electronics GmbH | Leuchtensystem |
| WO2013061206A2 (en) * | 2011-10-25 | 2013-05-02 | Koninklijke Philips Electronics N.V. | Methods and apparatus for controlling a lighting fixture utilizing a communication protocol |
| US9370073B2 (en) * | 2012-04-17 | 2016-06-14 | Axlen, Inc. | Solid-state lighting systems having intelligent controls |
| JP6178858B2 (ja) * | 2012-10-16 | 2017-08-09 | フィリップス ライティング ホールディング ビー ヴィ | 通信プロトコルを用いた三相電力システムを介する通信のための方法及び装置 |
| KR101317462B1 (ko) * | 2013-06-18 | 2013-10-11 | 우성전기주식회사 | 터널등 시스템 |
| CN103533717B (zh) * | 2013-10-25 | 2015-11-18 | 深圳市镭润科技有限公司 | 基于直流供电通信的电子设备及其控制方法 |
-
2016
- 2016-01-22 EP EP16702356.3A patent/EP3235349B1/de active Active
- 2016-01-22 WO PCT/EP2016/051291 patent/WO2016131605A1/de not_active Ceased
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| WO2016131605A1 (de) | 2016-08-25 |
| EP3235349B1 (de) | 2021-08-18 |
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