EP0645945A1 - Flashing light warning device for use in vehicles - Google Patents
Flashing light warning device for use in vehicles Download PDFInfo
- Publication number
- EP0645945A1 EP0645945A1 EP94114494A EP94114494A EP0645945A1 EP 0645945 A1 EP0645945 A1 EP 0645945A1 EP 94114494 A EP94114494 A EP 94114494A EP 94114494 A EP94114494 A EP 94114494A EP 0645945 A1 EP0645945 A1 EP 0645945A1
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- European Patent Office
- Prior art keywords
- fault
- warning system
- flashing light
- light warning
- signal
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- 238000001514 detection method Methods 0.000 claims description 45
- 238000011156 evaluation Methods 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 8
- 239000003990 capacitor Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Classifications
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- 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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
- H05B41/34—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp to provide a sequence of flashes
Definitions
- the invention relates to a flashing light system for operation in vehicles, with a voltage converter which is fed from the vehicle electrical system by means of a converter control, with an energy store which is charged from the voltage generated by the voltage converter and which forms a lamp circuit with a flash tube and with an ignition stage , which is connected to the flash tube and to a clock generator, the ignition stage generating ignition pulses for the ignition of the flash tube in dependence on the clock signals of the clock generator.
- a flashing light warning system is known from German patent DE 39 17 062 C2, which is suitable for operation in vehicles.
- This flashing light warning system has a voltage converter which is designed as a flyback converter and which is supplied from the vehicle electrical system via a converter control. From the voltage generated by the voltage converter, an energy store, which is designed as a capacitor having a high capacitance, is charged. This forms a lamp circle with at least one flash tube.
- the light flash warning system also has an ignition stage which is coupled to the flash tube via an ignition electrode and is connected to a clock generator, the ignition stage generating ignition pulses for the ignition of the flash tube depending on the clock signals of the clock generator and the energy store being discharged.
- the known light flash warning system also has a lightning voltage monitor that controls the state of charge of the energy store and controls the converter control as a function of the state of charge of the energy store.
- This known safety shutdown proves to be disadvantageous in that the converter is only shut down due to an error in which the generation of voltage pulses in the lamp circuit is no longer possible. It proves to be particularly disadvantageous that when the high voltage is grounded to ground, for example when a person comes into contact with the leads to the flash tube, the voltage converter is not switched off, since voltage pulses can continue to be generated in the lamp circuit.
- the invention has for its object to provide a flashing light system which has a high level of security against destruction of components of the system in the event of malfunctions and damage and protects people who come into contact with high-voltage parts of the system as well as possible from damage.
- a current sensor is arranged in the lamp circuit, that the current sensor is connected to a fault current detection, that the fault current detection is connected to the clock generator is that the fault current detection links the clock signal from the clock generator with the signal from the current sensor, that an error signal is generated only outside the pulse duration of the light flashes, and that the fault current detection is connected to the converter control for switching off the voltage converter in the event of an error signal.
- a current sensor is arranged in the lamp circuit, because the current flowing in the lamp circuit can thus be determined in a simple manner.
- the current sensor is connected to a fault current detection, the possibility of monitoring the current flowing in the lamp circuit arises in a simple and inexpensive manner.
- the fault current detection is connected to the clock generator, that the fault current detection combines the clock signal from the clock generator with the signal from the current sensor, and that an error signal is only generated outside the pulse duration of the light flashes, because thus a current flowing in the lamp circuit can be recognized in a simple and cost-effective manner by the fault current detection, which current is not caused by the ignition of the flash tube and the discharge of the energy store, but outside the pulse duration of the light flashes, which as current pulses in the lamp circuit by the Current sensor are measured.
- Such a fault current to be detected in the lamp circuit can occur, for example, through a glass break on the flash tube or through destruction of the line insulation in the lamp circuit if a body connection of the high voltage to ground occurs.
- the energy store is discharged to ground. If the body closure is created by a person, this can be damaged.
- the fault current detection is connected to the converter control for switching off the voltage converter when a fault signal is present, thereby avoiding recharging of the energy store and avoiding damage to components of the flashing light warning system or to people.
- the fault current detection is connected to a quick discharge circuit which is connected to the energy store and discharges it when the fault signal is present, as a result of which the residual charge of the energy store is rapidly and easily reduced in the high voltage circuit of the lamp when a fault current occurs, which prevents damage to components of the flashing light warning system and to people who come into contact with the lamp circuit.
- a fault memory is arranged in the connection between the fault current detection with the converter control and the fast discharge circuit prevents the light flash warning system from switching on again automatically when a fault current is detected.
- the fault memory can be reset by disconnecting the flashing light system from the on-board voltage, thereby ensuring that the presence of a fault is consciously perceived, self-activation of the flashing light warning system is avoided and a fault check is carried out by a specialist.
- a flash misfire detection is arranged in parallel with the fault current detection in the connection between the current sensor and the fault memory, so that there is additional security if the Functionality of the flashing light warning system, for example due to a break in the supply line of the flash tube or a lack of age-related ignitability of the flash tube no longer exists.
- the voltage converter is switched off via the converter control and the energy store is rapidly discharged via the rapid discharge circuit.
- the fault current detection has a timing element, the time constant of which is greater than the duration of the flash pulse, which in a particularly simple and cost-effective manner avoids that the periodic current pulses introduced by the clock signal in the lamp circuit due to the discharge of the energy store cause the flash tube to switch off the voltage converter, since the generation of an error signal is blocked for the duration of the flash pulse.
- the current sensor has a diode arrangement in the lamp circuit, as a result of which the current measurement is carried out with a high degree of safety and high accuracy.
- the quick discharge circuit has an electronic switch and a low-resistance discharge resistor results in a simple and inexpensive construction of the quick discharge circuit.
- the flashing light warning system with the protective devices mentioned in an emergency light for criminal vehicles with an automatically acting holder for optional attachment to the vehicle roof, since such use can easily damage the flashing light warning system, for example in the event of an accident, in which the emergency light detaches from the vehicle due to its attachment, is damaged and the flash tube or high-voltage circuit parts are exposed and can come into contact with people, for example.
- the single figure shows a block diagram of a flashing light warning system according to the invention for operation in vehicles.
- An EMC filter (F) connected to ground is connected to the on-board voltage, not shown here, which consists, for example, of the motor vehicle battery.
- the voltage converter (S) which can be constructed as a flyback converter, for example, is fed on the primary side from the filtered on-board voltage via a converter control (W).
- the voltage converter (S) is connected on the secondary side to an energy store (E), which can be designed as an electrolytic capacitor with high capacitance.
- the energy store (E) is charged by the voltage generated by the voltage converter (S).
- the energy store (E) is connected to at least one flash tube (BR) and can be discharged via this.
- the energy store (E) forms a lamp circuit with the at least one flash tube (BR).
- the flash tube (BR) is connected to an ignition stage (Z), which is fed by the voltage from the voltage converter (S) becomes.
- the ignition stage (Z) is also connected to a clock generator (T) which generates pulse-shaped clock signals and feeds the ignition stage (Z).
- T clock generator
- the ignition stage (Z) generates ignition pulses which are fed to the at least one flash tube (BR) via an ignition electrode. Due to the ignition pulses from the ignition stage (Z), the gas mixture ignites in the flash tube (BR) and a flash of light is generated when the energy store (E) is discharged. A current flows into the lamp circuit. As can be seen from the block diagram, the lamp circuit is connected to ground.
- a lightning voltage monitor (BW) is assigned to the energy store, which controls the state of charge of the energy store (E) and generates a signal as a function of a predetermined voltage value that controls the converter control (W) and thereby switches off the voltage converter (S) becomes.
- the energy store (E) is electrically conductively connected to the lightning voltage monitor (BW) and this to the converter control (W).
- a booster voltage generator (B) is arranged in parallel with the energy store (E), which is generated from the voltage from the voltage converter (S ) is supplied.
- This booster voltage generation (B) has a high-voltage-resistant capacitor with a small charging time constant to initiate the lightning discharge.
- a current sensor is arranged between the cathode of the flash tube (BR) and the energy store (E). This has, for example, a diode arrangement for measuring the voltage drop corresponding to a current in the lamp circuit.
- the current sensor (SS) is connected on the one hand to a lightning interruption detection (BA) and on the other hand to a residual current detection (FE).
- the flash failure detection (BA) has, for example, a triggerable flip-flop, the triggering being effected by the current pulses generated in the lamp circuit by the ignition of the flash tube (BR). If the current pulses in the lamp circuit are interrupted in a timed manner, the flash interruption detection (BA) generates an error signal.
- the fault current detection (FE) is also connected to the clock generator (T) and also has, for example, a triggerable multivibrator.
- the fault current detection (FE) links the current signal measured by the current sensor (SS) in the lamp circuit with the clock signal generated by the clock generator (T), which is the same signal that also controls the ignition stage (Z) to generate ignition pulses, such that that an error signal is generated only outside the pulse duration of the light flashes and the current pulses occurring in the lamp circuit.
- the fault current detection (FE) for linking the signals from the current sensor (SS) and the clock generator (T) can have an adder.
- the residual current detection (FE) has a timer with a time constant that is greater than the duration of the lightning pulse.
- Both the fault current detection (FE) and the flash misfire detection (BA) are each connected to a fault memory (FS).
- the error memory (FS) In the event of an error signal from the flash failure detection (BA) or the residual current detection (FE), the error memory (FS) generates a signal for switching off the voltage converter (S).
- the fault memory (FS) is electrically conductively connected to the converter control (W).
- the fault memory (FS) is connected in an electrically conductive manner to a quick discharge circuit (SE) which is activated by the fault memory detection (FS) in the event of an existing fault signal by the flash misfire detection (BA) or the fault current detection (FE).
- SE quick discharge circuit
- the Fast discharge circuit (SE) is electrically conductively connected to both the energy store (E) and the booster voltage generation (B) and discharges the energy store (E) and the capacitor of the booster voltage generation (B) as quickly as possible when activated by the fault memory (FS).
- the rapid discharge circuit (SE) has an electronic switch and a low-resistance discharge resistor.
- the clock generator (T) is electrically conductively connected to the converter control (W) for triggering.
- the generation of an error signal by the fault current detection (FE) takes place here, for example, in a time less than or equal to 100 milliseconds and in particular approximately 30 milliseconds after the occurrence of a fault current.
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Traffic Control Systems (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
- Audible And Visible Signals (AREA)
Abstract
Description
Die Erfindung betrifft eine Lichtblitzwarnanlage zum Betrieb in Fahrzeugen, mit einem Spannungswandler, der mittels einer Wandlersteuerung aus dem Fahrzeugbordnetz gespeist wird, mit einem Energiespeicher, der aus der von dem Spannungswandler erzeugten Spannung aufgeladen wird und der mit einer Blitzröhre einen Lampenkreis bildet und mit einer Zündstufe, die mit der Blitzröhre und mit einem Taktgeber verbunden ist, wobei die Zündstufe in Abhängigkeit von den Taktsignalen des Taktgebers Zündimpulse für die Zündung der Blitzröhre erzeugt.The invention relates to a flashing light system for operation in vehicles, with a voltage converter which is fed from the vehicle electrical system by means of a converter control, with an energy store which is charged from the voltage generated by the voltage converter and which forms a lamp circuit with a flash tube and with an ignition stage , which is connected to the flash tube and to a clock generator, the ignition stage generating ignition pulses for the ignition of the flash tube in dependence on the clock signals of the clock generator.
Aus der deutschen Patentschrift DE 39 17 062 C2 ist eine Lichtblitzwarnanlage bekannt, die für den Betrieb in Fahrzeugen geeignet ist. Diese Lichtblitzwarnanlage weist einen Spannungswandler auf, der als ein Sperrwandler ausgebildet ist und der über eine Wandlersteuerung aus dem Fahrzeugbordnetz versorgt wird. Aus der von dem Spannungswandler erzeugten Spannung wird ein Energiespeicher, der als ein eine hohe Kapazität aufweisender Elektrolytkondensator ausgebildeter Kondensator ist, aufgeladen. Dieser bildet mit mindestens einer Blitzröhre einen Lampenkreis. Die Lichtblitzwarnanlage verfügt des weiteren über eine Zündstufe, die über eine Zündelektrode an die Blitzröhre ankoppelt und mit einem Taktgeber verbunden ist, wobei die Zündstufe in Abhängigkeit von den Taktsignalen des Taktgebers Zündimpulse für die Zündung der Blitzröhre erzeugt und der Energiespeicher entladen wird. Die bekannte Lichtblitzwarnanlage verfügt des weiteren über einen Blitzspannungswächter, der den Ladezustand des Energiespeichers kontrolliert und in Abhängigkeit von dem Ladezustand des Energiespeichers die Wandlersteuerung ansteuert.A flashing light warning system is known from German patent DE 39 17 062 C2, which is suitable for operation in vehicles. This flashing light warning system has a voltage converter which is designed as a flyback converter and which is supplied from the vehicle electrical system via a converter control. From the voltage generated by the voltage converter, an energy store, which is designed as a capacitor having a high capacitance, is charged. This forms a lamp circle with at least one flash tube. The light flash warning system also has an ignition stage which is coupled to the flash tube via an ignition electrode and is connected to a clock generator, the ignition stage generating ignition pulses for the ignition of the flash tube depending on the clock signals of the clock generator and the energy store being discharged. The known light flash warning system also has a lightning voltage monitor that controls the state of charge of the energy store and controls the converter control as a function of the state of charge of the energy store.
Bei der bekannten Lichtblitzwarnanlage erweist sich als nachteilig, daß bei auftretenden Fehlern in dem Sekundärkreis des Spannungswandlers und in dem Lampenkreis Bauteile der Lichtblitzwarnanlage zerstört werden können und Menschen, die mit dem Sekundärkreis des Spannungswandlers und dem Lampenkreis bei dem Betrieb der Lichtblitzwarnanlage unter Fehlerbedingung in Berührung kommen, gefährdet werden.In the known light flash warning system it proves disadvantageous that, if errors occur in the secondary circuit of the voltage converter and in the lamp circuit, components of the light flash warning system can be destroyed and people who come into contact with the secondary circuit of the voltage converter and the lamp circuit during operation of the light flash warning system under fault conditions , are at risk.
Aus dem deutschen Gebrauchsmuster G 91 02 562 U1 ist eine Sicherheitsabschaltung für elektronische Blitzleuchten bekannt, bei der der durch die Zündung der Blitzröhre entstehende impulsförmige Spannungsabfall in dem Lampenkreis gemessen wird und bei einem zeitlich vorbestimmten Ausbleiben der Spannungsimpulse eine Abschaltung des Wandlersystems erfolgt.From the German utility model G 91 02 562 U1, a safety shutdown for electronic flashing lights is known, in which the pulse-shaped voltage drop in the lamp circuit caused by the ignition of the flash tube is measured and the converter system is switched off if the voltage pulses are not predetermined in time.
Bei dieser bekannten Sicherheitsabschaltung erweist sich als nachteilig, daß eine Abschaltung des Wandlers nur aufgrund eines Fehlers erfolgt, bei dem die Erzeugung von Spannungsimpulsen in dem Lampenkreis nicht mehr möglich ist. Als besonders nachteilig erweist sich dabei, daß bei einem Körperschluß der Hochspannung gegen Masse, zum Beispiel dann, wenn ein Mensch mit den Zuleitungen zu der Blitzröhre in Berührung kommt, keine Abschaltung des Spannungswandlers erfolgt, da weiterhin Spannungsimpulse in dem Lampenkreis erzeugt werden können.This known safety shutdown proves to be disadvantageous in that the converter is only shut down due to an error in which the generation of voltage pulses in the lamp circuit is no longer possible. It proves to be particularly disadvantageous that when the high voltage is grounded to ground, for example when a person comes into contact with the leads to the flash tube, the voltage converter is not switched off, since voltage pulses can continue to be generated in the lamp circuit.
Der Erfindung liegt die Aufgabe zugrunde, eine Lichtblitzwarnanlage zu schaffen, die bei auftretenden Fehlfunktionen und Beschädigungen eine hohe Sicherheit gegen Zerstörung von Bauteilen der Anlage aufweist und Menschen, die mit hochspannungsführenden Teilen der Anlage in Berührung kommen, bestmöglich vor Schäden schützt.The invention has for its object to provide a flashing light system which has a high level of security against destruction of components of the system in the event of malfunctions and damage and protects people who come into contact with high-voltage parts of the system as well as possible from damage.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß in dem Lampenkreis ein Stromsensor angeordnet ist, daß der Stromsensor mit einer Fehlerstromerkennung verbunden ist, daß die Fehlerstromerkennung mit dem Taktgeber verbunden ist, daß die Fehlerstromerkennung das Taktsignal von dem Taktgeber mit dem Signal von dem Stromsensor verknüpft, daß ein Fehlersignal nur außerhalb der Impulsdauer der Lichtblitze erzeugt wird und daß die Fehlerstromerkennung mit der Wandlersteuerung zur Abschaltung des Spannungswandlers bei vorliegendem Fehlersignal verbunden ist.The object is achieved in that a current sensor is arranged in the lamp circuit, that the current sensor is connected to a fault current detection, that the fault current detection is connected to the clock generator is that the fault current detection links the clock signal from the clock generator with the signal from the current sensor, that an error signal is generated only outside the pulse duration of the light flashes, and that the fault current detection is connected to the converter control for switching off the voltage converter in the event of an error signal.
Es ist von Vorteil, daß in dem Lampenkreis ein Stromsensor angeordnet ist, weil somit der in dem Lampenkreis fließende Strom auf einfache Weise ermittelt werden kann.It is advantageous that a current sensor is arranged in the lamp circuit, because the current flowing in the lamp circuit can thus be determined in a simple manner.
Dadurch, daß der Stromsensor mit einer Fehlerstromerkennung verbunden ist, ergibt sich auf einfache und kostengünstige Weise die Möglichkeit der Überwachung des in dem Lampenkreis fließenden Stroms.Because the current sensor is connected to a fault current detection, the possibility of monitoring the current flowing in the lamp circuit arises in a simple and inexpensive manner.
In Verbindung mit der Verwendung bei Lichtblitzwarnanlagen erweist sich als besonders vorteilhaft, daß die Fehlerstromerkennung mit dem Taktgeber verbunden ist, daß die Fehlerstromerkennung das Taktsignal von dem Taktgeber mit dem Signal von dem Stromsensor verknüpft und daß ein Fehlersignal nur außerhalb der Impulsdauer der Lichtblitze erzeugt wird, weil somit auf einfache und kostengünstige Weise durch die Fehlerstromerkennung ein in dem Lampenkreis fließender Strom erkannt werden kann, der nicht durch die Zündung der Blitzröhre und die Entladung des Energiespeichers bedingt ist, sondern außerhalb der Impulsdauer der Lichtblitze, die als Stromimpulse in dem Lampenkreis durch den Stromsensor gemessen werden, liegt. Ein solcher zu detektierender Fehlerstrom in dem Lampenkreis kann zum Beispiel durch einen Glasbruch an der Blitzröhre oder durch eine Zerstörung der Leitungsisolation im Lampenkreis erfolgen, wenn ein Körperschluß der Hochspannung gegen Masse auftritt. Hierbei wird der Energiespeicher gegen Masse entladen. Wird der Körperschluß durch einen Menschen erzeugt, kann dieser geschädigt werden.In connection with the use in light flash warning systems, it proves to be particularly advantageous that the fault current detection is connected to the clock generator, that the fault current detection combines the clock signal from the clock generator with the signal from the current sensor, and that an error signal is only generated outside the pulse duration of the light flashes, because thus a current flowing in the lamp circuit can be recognized in a simple and cost-effective manner by the fault current detection, which current is not caused by the ignition of the flash tube and the discharge of the energy store, but outside the pulse duration of the light flashes, which as current pulses in the lamp circuit by the Current sensor are measured. Such a fault current to be detected in the lamp circuit can occur, for example, through a glass break on the flash tube or through destruction of the line insulation in the lamp circuit if a body connection of the high voltage to ground occurs. Here, the energy store is discharged to ground. If the body closure is created by a person, this can be damaged.
Es erweist sich dabei als vorteilhaft, daß die Fehlerstromerkennung mit der Wandlersteuerung zur Abschaltung des Spannungswandlers bei vorliegendem Fehlersignal verbunden ist, wodurch ein Nachladen des Energiespeichers vermieden wird und die Schädigung von Bauteilen der Lichtblitzwarnanlage oder von Menschen vermieden wird.It proves to be advantageous that the fault current detection is connected to the converter control for switching off the voltage converter when a fault signal is present, thereby avoiding recharging of the energy store and avoiding damage to components of the flashing light warning system or to people.
Es ist vorteilhaft, daß die Fehlerstromerkennung mit einer Schnellentladeschaltung verbunden ist, die an den Energiespeicher angeschlossen ist und diesen bei vorliegendem Fehlersignal entlädt, wodurch auf einfache und kostengünstige Weise sehr schnell die Restladung des Energiespeichers bei einem auftretenden Fehlerstrom in dem Hochspannung führenden Lampenkreis abgebaut wird, wodurch eine Schädigung von Bauteilen der Lichtblitzwarnanlage und von Menschen, die mit dem Lampenkreis in Berührung kommen, ausgeschlossen wird.It is advantageous that the fault current detection is connected to a quick discharge circuit which is connected to the energy store and discharges it when the fault signal is present, as a result of which the residual charge of the energy store is rapidly and easily reduced in the high voltage circuit of the lamp when a fault current occurs, which prevents damage to components of the flashing light warning system and to people who come into contact with the lamp circuit.
Dadurch, daß in der Verbindung zwischen der Fehlerstromerkennung mit der Wandlersteuerung und der Schnellentladeschaltung ein Fehlerspeicher angeordnet ist, wird vermieden, daß bei einem detektierten Fehlerstrom eine sofortige Selbstwiedereinschaltung der Lichtblitzwarnanlage erfolgt.The fact that a fault memory is arranged in the connection between the fault current detection with the converter control and the fast discharge circuit prevents the light flash warning system from switching on again automatically when a fault current is detected.
In diesem Zusammenhang erweist es sich als vorteilhaft, daß der Fehlerspeicher durch Trennen der Lichtblitzwarnanlage von der Bordspannung rücksetzbar ist, wodurch sichergestellt wird, daß das Vorliegen eines Fehlers bewußt wahrgenommen wird, eine Selbsteinschaltung der Lichtblitzwarnanlage vermieden wird und eine Fehlerüberprüfung durch einen Fachmann erfolgt.In this context, it proves to be advantageous that the fault memory can be reset by disconnecting the flashing light system from the on-board voltage, thereby ensuring that the presence of a fault is consciously perceived, self-activation of the flashing light warning system is avoided and a fault check is carried out by a specialist.
Es ist von Vorteil, daß parallel zu der Fehlerstromerkennung in der Verbindung zwischen dem Stromsensor und dem Fehlerspeicher eine Blitzaussetzerkennung angeordnet ist, so daß eine zusätzliche Sicherheit gegeben ist, wenn die Funktionsfähigkeit der Lichtblitzwarnanlage, zum Beispiel bedingt durch einen Abriß der Zuleitung der Blitzröhre oder durch eine mangelnde altersbedingte Zündfähigkeit der Blitzröhre nicht mehr besteht. Auch in diesem Fall erfolgt eine Abschaltung des Spannungswandlers über die Wandlersteuerung und eine Schnellentladung des Energiespeichers über die Schnellentladeschaltung.It is advantageous that a flash misfire detection is arranged in parallel with the fault current detection in the connection between the current sensor and the fault memory, so that there is additional security if the Functionality of the flashing light warning system, for example due to a break in the supply line of the flash tube or a lack of age-related ignitability of the flash tube no longer exists. In this case too, the voltage converter is switched off via the converter control and the energy store is rapidly discharged via the rapid discharge circuit.
Dadurch, daß die Verknüpfung des Signals von dem Stromsensor mit dem Taktsignal von dem Taktgeber durch einen Addierer erfolgt, ist eine besonders einfache und kostengünstige Verknüpfung dieser Signale realisiert.Because the signal from the current sensor is linked to the clock signal from the clock generator by an adder, a particularly simple and inexpensive combination of these signals is realized.
Es ist von Vorteil, daß die Fehlerstromerkennung ein Zeitglied aufweist, dessen Zeitkonstante größer ist, als die Dauer des Blitzimpulses, wodurch auf besonders einfache und kostengünstige Weise vermieden wird, daß die durch das Taktsignal eingeleiteten periodischen Stromimpulse in dem Lampenkreis durch die Entladung des Energiespeichers über die Blitzröhre zu einer Abschaltung des Spannungswandlers führen, da die Erzeugung eines Fehlersignals für die Dauer des Blitzimpulses gesperrt wird.It is advantageous that the fault current detection has a timing element, the time constant of which is greater than the duration of the flash pulse, which in a particularly simple and cost-effective manner avoids that the periodic current pulses introduced by the clock signal in the lamp circuit due to the discharge of the energy store cause the flash tube to switch off the voltage converter, since the generation of an error signal is blocked for the duration of the flash pulse.
Dadurch, daß die Fehlerstromerkennung, die Blitzaussetzerkennung und der Fehlerspeicher triggerbare Kippstufen zur Signalauswertung aufweisen, ergibt sich ein besonders einfacher und kostengünstiger Aufbau der Lichtblitzwarnanlage.The fact that the fault current detection, the flash misfire detection and the fault memory have triggerable flip-flops for signal evaluation results in a particularly simple and inexpensive construction of the light flash warning system.
Es ist von Vorteil, daß der Stromsensor eine Diodenanordnung in dem Lampenkreis aufweist, wodurch die Strommessung mit hoher Sicherheit und hoher Exaktheit erfolgt.It is advantageous that the current sensor has a diode arrangement in the lamp circuit, as a result of which the current measurement is carried out with a high degree of safety and high accuracy.
Dadurch, daß die Schnellentladeschaltung einen elektronischen Schalter und einen niederohmigen Entladewiderstand aufweist, ergibt sich ein einfacher und kostengünstiger Aufbau der Schnellentladeschaltung.The fact that the quick discharge circuit has an electronic switch and a low-resistance discharge resistor results in a simple and inexpensive construction of the quick discharge circuit.
Es ist von Vorteil, die Lichtblitzwarnanlage mit den genannten Schutzvorrichtungen bei einer eine selbsttätig wirkende Halterung aufweisende Einsatzleuchte für Kriminalfahrzeuge zur wahlweisen Anbringung auf dem Fahrzeugdach zu verwenden, da bei einer solchen Verwendung leicht eine Beschädigung der Lichtblitzwarnanlage, zum Beispiel bei einem Unfall, erfolgen kann, bei dem die Einsatzleuchte sich aufgrund ihrer Anbringung von dem Fahrzeug löst, beschädigt wird und die Blitzröhre oder hochspannungsführende Schaltungsteile freigelegt werden und zum Beispiel mit Personen in Kontakt kommen können.It is advantageous to use the flashing light warning system with the protective devices mentioned in an emergency light for criminal vehicles with an automatically acting holder for optional attachment to the vehicle roof, since such use can easily damage the flashing light warning system, for example in the event of an accident, in which the emergency light detaches from the vehicle due to its attachment, is damaged and the flash tube or high-voltage circuit parts are exposed and can come into contact with people, for example.
Im folgenden wird kurz ein Ausführungsbeispiel des Erfindungsgegenstandes beschrieben.An exemplary embodiment of the subject matter of the invention is briefly described below.
Die einzige Figur zeigt ein Blockschaltbild einer erfindungsgemäßen Lichtblitzwarnanlage zum Betrieb in Fahrzeugen.The single figure shows a block diagram of a flashing light warning system according to the invention for operation in vehicles.
Ein mit Masse verbundener EMC-Filter (F) ist mit der hier nicht gezeigten Bordspannung verbunden, die zum Beispiel aus der Kraftfahrzeugbatterie besteht. Der Spannungswandler (S), der zum Beispiel als ein Sperrwandler aufgebaut sein kann, wird primärseitig aus der gefilterten Bordspannung über eine Wandlersteuerung (W) gespeist. Der Spannungswandler (S) ist sekundärseitig mit einem Energiespeicher (E) verbunden, der als ein Elektrolytkondensator mit hoher Kapazität ausgebildet sein kann. Der Energiespeicher (E) wird durch die von dem Spannungswandler (S) erzeugte Spannung aufgeladen.An EMC filter (F) connected to ground is connected to the on-board voltage, not shown here, which consists, for example, of the motor vehicle battery. The voltage converter (S), which can be constructed as a flyback converter, for example, is fed on the primary side from the filtered on-board voltage via a converter control (W). The voltage converter (S) is connected on the secondary side to an energy store (E), which can be designed as an electrolytic capacitor with high capacitance. The energy store (E) is charged by the voltage generated by the voltage converter (S).
Der Energiespeicher (E) ist mit mindestens einer Blitzröhre (BR) verbunden und kann über diese entladen werden. Der Energiespeicher (E) bildet mit der mindestens einen Blitzröhre (BR) einen Lampenkreis.The energy store (E) is connected to at least one flash tube (BR) and can be discharged via this. The energy store (E) forms a lamp circuit with the at least one flash tube (BR).
Die Blitzröhre (BR) ist mit einer Zündstufe (Z) verbunden, die aus der Spannung von dem Spannungswandler (S) gespeist wird. Die Zündstufe (Z) ist zudem mit einem Taktgeber (T) verbunden, der impulsförmige Taktsignale erzeugt und der Zündstufe (Z) zuführt. Die Zündstufe (Z) erzeugt in Abhängigkeit von den Taktsignalen des Taktgebers (T) Zündimpulse, die der mindestens einen Blitzröhre (BR) über eine Zündelektrode zugeführt werden. Aufgrund der Zündimpulse von der Zündstufe (Z) zündet das Gasgemisch in der Blitzröhre (BR) und unter Entladung des Energiespeichers (E) wird ein Lichtblitz erzeugt. Hierbei fließt ein Strom in den Lampenkreis. Wie dem Blockschaltbild entnehmbar ist, ist der Lampenkreis mit Masse verbunden.The flash tube (BR) is connected to an ignition stage (Z), which is fed by the voltage from the voltage converter (S) becomes. The ignition stage (Z) is also connected to a clock generator (T) which generates pulse-shaped clock signals and feeds the ignition stage (Z). Depending on the clock signals of the clock generator (T), the ignition stage (Z) generates ignition pulses which are fed to the at least one flash tube (BR) via an ignition electrode. Due to the ignition pulses from the ignition stage (Z), the gas mixture ignites in the flash tube (BR) and a flash of light is generated when the energy store (E) is discharged. A current flows into the lamp circuit. As can be seen from the block diagram, the lamp circuit is connected to ground.
Bei dem hier gezeigten Ausführungsbeispiel ist dem Energiespeicher ein Blitzspannungswächter (BW) zugeordnet, der den Ladezustand des Energiespeichers (E) kontrolliert und in Abhängigkeit von einem vorgegebenen Spannungswert ein Signal erzeugt, daß die Wandlersteuerung (W) ansteuert und wodurch der Spannungswandler (S) abgeschaltet wird. Hierzu ist der Energiespeicher (E) mit dem Blitzspannungswächter (BW) und dieser mit der Wandlersteuerung (W) elektrisch leitend verbunden.In the exemplary embodiment shown here, a lightning voltage monitor (BW) is assigned to the energy store, which controls the state of charge of the energy store (E) and generates a signal as a function of a predetermined voltage value that controls the converter control (W) and thereby switches off the voltage converter (S) becomes. For this purpose, the energy store (E) is electrically conductively connected to the lightning voltage monitor (BW) and this to the converter control (W).
Um sicherzustellen, daß bei jedem erzeugten Zündimpuls von der Zündstufe (Z) die Blitzröhre (BR) zündet und ein Lichtblitz erzeugt wird, ist parallel zu dem Energiespeicher (E) eine Boosterspannungserzeugung (B) angeordnet, die aus der Spannung von dem Spannungswandler (S) versorgt wird. Diese Boosterspannungserzeugung (B) weist einen hochspannungsfesten Kondensator mit einer kleinen Ladezeitkonstanten zur Einleitung der Blitzentladung auf.In order to ensure that the flash tube (BR) ignites and a flash of light is generated with each generated ignition pulse from the ignition stage (Z), a booster voltage generator (B) is arranged in parallel with the energy store (E), which is generated from the voltage from the voltage converter (S ) is supplied. This booster voltage generation (B) has a high-voltage-resistant capacitor with a small charging time constant to initiate the lightning discharge.
Bei dem hier gezeigten Ausführungsbeispiel ist zwischen der Kathode der Blitzröhre (BR) und dem Energiespeicher (E) ein Stromsensor (SS) angeordnet. Dieser weist beispielhaft eine Diodenanordnung zur Messung des einem Strom in dem Lampenkreis entsprechenden Spannungsabfalls auf.In the embodiment shown here, a current sensor (SS) is arranged between the cathode of the flash tube (BR) and the energy store (E). This has, for example, a diode arrangement for measuring the voltage drop corresponding to a current in the lamp circuit.
Der Stromsensor (SS) ist zum einen mit einer Blitzaussetzerkennung (BA) und zum anderen mit einer Fehlerstromerkennung (FE) elektrisch leitend verbunden. Die Blitzaussetzerkennung (BA) weist beispielhaft eine triggerbare Kippstufe auf, wobei die Triggerung durch die im Lampenkreis durch die Zündung der Blitzröhre (BR) erzeugten Stromimpulse erfolgt. Bei einem zeitlich vorgegebenen Aussetzen der Stromimpulse in dem Lampenkreis erzeugt die Blitzaussetzerkennung (BA) ein Fehlersignal.The current sensor (SS) is connected on the one hand to a lightning interruption detection (BA) and on the other hand to a residual current detection (FE). The flash failure detection (BA) has, for example, a triggerable flip-flop, the triggering being effected by the current pulses generated in the lamp circuit by the ignition of the flash tube (BR). If the current pulses in the lamp circuit are interrupted in a timed manner, the flash interruption detection (BA) generates an error signal.
Die Fehlerstromerfassung (FE) ist zusätzlich mit dem Taktgeber (T) verbunden und weist beispielhaft ebenfalls eine triggerbare Kippstufe auf. Die Fehlerstromerkennung (FE) verknüpft dabei das von dem Stromsensor (SS) gemessene Stromsignal in dem Lampenkreis mit dem von dem Taktgeber (T) erzeugten Taktsignal, das das gleiche ist, das auch die Zündstufe (Z) zur Erzeugung von Zündimpulsen ansteuert, derart, daß ein Fehlersignal nur außerhalb der Impulsdauer der Lichtblitze und der dabei in dem Lampenkreis auftretenden Stromimpulse erzeugt wird. Hierzu kann die Fehlerstromerkennung (FE) zur Verknüpfung der Signale von dem Stromsensor (SS) und dem Taktgeber (T) einen Addierer aufweisen. Die Fehlerstromerkennung (FE) verfügt dabei über ein Zeitglied, mit einer Zeitkonstanten, die größer ist als die Dauer des Blitzimpulses.The fault current detection (FE) is also connected to the clock generator (T) and also has, for example, a triggerable multivibrator. The fault current detection (FE) links the current signal measured by the current sensor (SS) in the lamp circuit with the clock signal generated by the clock generator (T), which is the same signal that also controls the ignition stage (Z) to generate ignition pulses, such that that an error signal is generated only outside the pulse duration of the light flashes and the current pulses occurring in the lamp circuit. For this purpose, the fault current detection (FE) for linking the signals from the current sensor (SS) and the clock generator (T) can have an adder. The residual current detection (FE) has a timer with a time constant that is greater than the duration of the lightning pulse.
Sowohl die Fehlerstromerkennung (FE) als auch die Blitzaussetzerkennung (BA) sind jeweils mit einem Fehlerspeicher (FS) verbunden. Bei vorliegendem Fehlersignal von der Blitzaussetzerkennung (BA) oder der Fehlerstromerkennung (FE) erzeugt der Fehlerspeicher (FS) ein Signal zur Abschaltung des Spannungswandlers (S). Hierzu ist der Fehlerspeicher (FS) elektrisch leitend mit der Wandlersteuerung (W) verbunden. Zudem ist der Fehlerspeicher (FS) elektrisch leitend mit einer Schnellentladeschaltung (SE) verbunden, die bei einem vorliegenden Fehlersignal von der Blitzaussetzerkennung (BA) oder der Fehlerstromerkennung (FE) durch den Fehlerspeicher (FS) aktiviert wird. Die Schnellentladeschaltung (SE) ist elektrisch leitend sowohl mit dem Energiespeicher (E) als auch mit der Boosterspannungserzeugung (B) verbunden und entlädt den Energiespeicher (E) und den Kondensator der Boosterspannungserzeugung (B) bei Ansteuerung durch den Fehlerspeicher (FS) schnellstmöglich. Hierzu weist die Schnellentladeschaltung (SE) einen elektronischen Schalter und einen niederohmigen Entladewiderstand auf.Both the fault current detection (FE) and the flash misfire detection (BA) are each connected to a fault memory (FS). In the event of an error signal from the flash failure detection (BA) or the residual current detection (FE), the error memory (FS) generates a signal for switching off the voltage converter (S). For this purpose, the fault memory (FS) is electrically conductively connected to the converter control (W). In addition, the fault memory (FS) is connected in an electrically conductive manner to a quick discharge circuit (SE) which is activated by the fault memory detection (FS) in the event of an existing fault signal by the flash misfire detection (BA) or the fault current detection (FE). The Fast discharge circuit (SE) is electrically conductively connected to both the energy store (E) and the booster voltage generation (B) and discharges the energy store (E) and the capacitor of the booster voltage generation (B) as quickly as possible when activated by the fault memory (FS). For this purpose, the rapid discharge circuit (SE) has an electronic switch and a low-resistance discharge resistor.
Der Taktgeber (T) ist bei dem hier gezeigten Ausführungsbeispiel zur Triggerung elektrisch leitend mit der Wandlersteuerung (W) verbunden.In the exemplary embodiment shown here, the clock generator (T) is electrically conductively connected to the converter control (W) for triggering.
Die Erzeugung eines Fehlersignals durch die Fehlerstromerkennung (FE) erfolgt hier beispielhaft in einer Zeit kleiner gleich 100 Millisekunden und insbesondere etwa 30 Millisekunden nach dem Auftreten eines Fehlerstroms.The generation of an error signal by the fault current detection (FE) takes place here, for example, in a time less than or equal to 100 milliseconds and in particular approximately 30 milliseconds after the occurrence of a fault current.
- BB
- BoosterspannungserzeugungBooster voltage generation
- BABA
- BlitzaussetzerkennungFlash exposure detection
- BRBR
- BlitzröhreFlash tube
- BWBW
- BlitzspannungswächterLightning voltage monitor
- EE
- EnergiespeicherEnergy storage
- FF
- EMC-FilterEMC filter
- FEFE
- FehlerstromerkennungResidual current detection
- FSFS
- FehlerspeicherFault memory
- SS
- SpannungswandlerVoltage converter
- SESE
- SchnellentladeschaltungFast discharge circuit
- SSSS
- StromsensorCurrent sensor
- TT
- TaktgeberClock
- WW
- WandlersteuerungConverter control
- ZZ.
- ZündstufeIgnition level
Claims (11)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4333045A DE4333045A1 (en) | 1993-09-29 | 1993-09-29 | Flashing light warning system for operation in vehicles |
| DE4333045 | 1993-09-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0645945A1 true EP0645945A1 (en) | 1995-03-29 |
| EP0645945B1 EP0645945B1 (en) | 1998-12-16 |
Family
ID=6498875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94114494A Expired - Lifetime EP0645945B1 (en) | 1993-09-29 | 1994-09-15 | Flashing light warning device for use in vehicles |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0645945B1 (en) |
| AT (1) | ATE174749T1 (en) |
| DE (2) | DE4333045A1 (en) |
| DK (1) | DK0645945T3 (en) |
| ES (1) | ES2124826T3 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0399201A1 (en) * | 1989-05-26 | 1990-11-28 | Hella KG Hueck & Co. | Flashlight warning system |
| DE9102562U1 (en) * | 1990-10-26 | 1991-06-13 | UKE Kranefeld Elektronik GmbH, 4479 Herzlake | Electronic safety shutdown, high voltage side |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU385303A1 (en) * | 1971-02-01 | 1973-05-29 | 4 "NON-PARTNER PATNNI-TSHKYNEPNA? | |
| DE2703387B2 (en) * | 1977-01-27 | 1979-07-12 | Heimann Gmbh, 6200 Wiesbaden | Beacon system for motorcycles |
| IT1155172B (en) * | 1982-04-30 | 1987-01-21 | Wepoo Spa | PROTECTION CIRCUIT OF A FLASHING SIGNALING DEVICE |
| US4701672A (en) * | 1985-05-28 | 1987-10-20 | Tomar Electronics, Inc. | Strobe flash monitor |
| US4870543A (en) * | 1988-10-24 | 1989-09-26 | Robert L. Horton | Extensible safety light |
-
1993
- 1993-09-29 DE DE4333045A patent/DE4333045A1/en not_active Withdrawn
-
1994
- 1994-09-15 AT AT94114494T patent/ATE174749T1/en not_active IP Right Cessation
- 1994-09-15 DK DK94114494T patent/DK0645945T3/en active
- 1994-09-15 EP EP94114494A patent/EP0645945B1/en not_active Expired - Lifetime
- 1994-09-15 DE DE59407487T patent/DE59407487D1/en not_active Expired - Fee Related
- 1994-09-15 ES ES94114494T patent/ES2124826T3/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0399201A1 (en) * | 1989-05-26 | 1990-11-28 | Hella KG Hueck & Co. | Flashlight warning system |
| DE3917062A1 (en) * | 1989-05-26 | 1990-11-29 | Hella Kg Hueck & Co | LIGHTNING FLASH WARNING SYSTEM |
| DE9102562U1 (en) * | 1990-10-26 | 1991-06-13 | UKE Kranefeld Elektronik GmbH, 4479 Herzlake | Electronic safety shutdown, high voltage side |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0645945B1 (en) | 1998-12-16 |
| ES2124826T3 (en) | 1999-02-16 |
| ATE174749T1 (en) | 1999-01-15 |
| DK0645945T3 (en) | 1999-08-23 |
| DE59407487D1 (en) | 1999-01-28 |
| DE4333045A1 (en) | 1995-03-30 |
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