EP0557817B1 - Lichtblitzwarnanlage - Google Patents
Lichtblitzwarnanlage Download PDFInfo
- Publication number
- EP0557817B1 EP0557817B1 EP93102215A EP93102215A EP0557817B1 EP 0557817 B1 EP0557817 B1 EP 0557817B1 EP 93102215 A EP93102215 A EP 93102215A EP 93102215 A EP93102215 A EP 93102215A EP 0557817 B1 EP0557817 B1 EP 0557817B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switch
- flash
- voltage
- capacitor
- control logic
- 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.)
- Expired - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims description 70
- 238000004804 winding Methods 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims 2
- 230000000977 initiatory effect Effects 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 1
Images
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
- 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 light flash warning system, with a Voltage source, with a flyback converter, the one Has voltage converter, the primary winding with the Voltage source is connected and a control for has the voltage converter, with a flash capacitor, the one with the secondary winding of the voltage converter is connected to an auxiliary capacitor connected to the Secondary winding of the voltage converter is connected to a flash tube with the flash capacitor and Auxiliary capacitor is connected to an ignition circuit for the flash tube of the ignition pulses depending on Clock signals generated by a clock generator, with a first switch in series to the flash capacitor by a first comparator, the charge voltage of the Compares the flash capacitor with a reference voltage, is reversible so that the first switch in the non-conductive state is switched when the Charging voltage is greater than the reference voltage.
- the power supply of the Voltage converter via a second switch in the Regulate or switch off the primary circuit of the voltage transformer can prove to be disadvantageous that in the case of errors and Faults in the electrical system, in which the voltage source is a Undervoltage provides a safe generation of flashes of light is no longer guaranteed and due to the lack Power supply flash interruptions are present.
- the auxiliary capacitor the a small capacity, but a high one Has dielectric strength, only charged when the Flash capacitor, the z. B. as an electrolytic capacitor high capacity with low dielectric strength has reached its predetermined charging voltage.
- Flashing light warning system known, with a voltage source, a flyback converter, with a voltage converter and one Control, with a flash capacitor, with a Auxiliary capacitor, with a flash tube and with one Ignition circuit for generating ignition pulses for the Flash tube.
- this known flashing light warning system also proves to be a disadvantage that in the event of malfunctions in the Vehicle electrical system, e.g. B.
- the invention has for its object a Flashing light system to create the simple and is inexpensive and ensures that also in the event of undervoltage from the voltage source Flash generation is guaranteed and flash dropouts be avoided.
- the Clock generator is connected to a control logic that the Control logic with the ignition signals for the ignition circuit a time interval and an ignition signal duration that the control logic with a lead time before the time for the generation of the ignition signal of the ignition signal duration Signal generated that the first switch for a Switch-off time switches to the non-conductive state.
- the clock generator with a Control logic is related to the control logic Ignition signals for the ignition circuit with a time interval and an ignition signal duration that the control logic with a lead time before the creation of the Ignition signal of the ignition signal duration generates a signal that the first switch for a shutdown period in the non-conductive state switches, making it simple and cost-effective way to ensure that before everyone Ignition signal, due to which the ignition circuit has a Ignition pulse generated, a signal is generated that the first Switch switches in the non-conductive state, whereby it is ensured that even in the event of malfunctions in the vehicle electrical system, where there is undervoltage from the voltage source is not sufficient, the flash capacitor on the provided and detected by the first comparator Charge the flash capacitor from the Power supply separated by the voltage converter and the auxiliary capacitor from the voltage converter is charged so that when the ignition is initiated by the ignition pulse from the ignition circuit Undervoltage supply by the voltage source has sufficient charging voltage to the Initiate light flash generation safely and reliably. Due to the low capacitance of
- control logic is a first Output that is connected to the ignition circuit and that the control logic has a second output which is connected to the control input of the first switch, because it is particularly easy and inexpensive Embodiment is created in which the control logic, controlled by the clock generator, the control signals both for the ignition circuit and for switching of the first switch.
- control logic a third Has output that is connected to the control, making the. simple and inexpensive Flyback converter depending on different Operating situations of the flashing light warning system controlled can be.
- type of control of the voltage converter be different in order to optimize the charging behavior of the Flash capacitor and / or the auxiliary capacitor to reach.
- flashing light warning system in aircraft to use because it ensures that dangerous situations due to the failure of the Flashing light warning system in the event of power supply faults be avoided and in the event of undervoltage Power supply no flash dropouts occur.
- FIG. 1 shows an embodiment of a Flashing light system according to the invention, the one Has voltage source (S).
- the voltage source (S) is the DC voltage source in this embodiment the electrical system of an aircraft, which has a DC voltage of 28 volts.
- the voltage source (S) is electrical conductive over the switching path of a second switch (T2) with the primary winding of a voltage converter (W) connected.
- the second switch (T2) which is exemplary here is designed as a MOS-FET, with its Control input connected to a control (A) that e.g. B. can have an inverter.
- the control (A) thus forms one with the voltage converter (W) Flyback converter.
- the second switch (T2) is the Voltage converter (W) can be separated from the voltage source (S).
- the control (A) is one with the third output (A3) Control logic (SL) connected by a clock generator (T) Clock signals delivered.
- the secondary winding of the voltage converter (W) is over a first diode, which is switched in the forward direction, with the first electrode of a flash capacitor (C1) connected.
- the flash capacitor (C1) as an electrolytic capacitor trained with high capacity.
- the second electrode of the Flash capacitor (C1) has a fourth diode (D4) that is switched in the reverse direction and via a second diode (D2), which is switched in the forward direction, with the Secondary winding of the voltage converter connected.
- Parallel to the fourth diode (D4) a series connection is off a fifth diode (D5) in the forward direction is switched, and the switching path of a first Switch arranged.
- the first switch (T1) as one MOS-FET trained.
- the first switch (T1) is over one Control input reversible and can thus connect the Flash capacitor (C1) with the voltage converter (W) interrupt.
- Parallel to the flash capacitor (C1) is a Auxiliary capacitor (C2) arranged in the here shown embodiment not as a Electrolytic capacitor is designed and a lower Has capacitance than the flash capacitor (C1).
- the Dielectric strength of the auxiliary capacitor is here selected embodiment higher than that Dielectric strength of the flash capacitor (C1).
- Parallel to the auxiliary capacitor (C2) can by the Flashing light system to be operated via a flash tube first terminal (K1) and a second terminal (K2) connected be.
- the flash tube is the one shown here Embodiment not shown. Not either the flash tube is shown Ignition circuit, which the ignition pulses for starting the Flash tube supplies.
- the ignition circuit not shown, is using a third terminal (K3) and a first output (A1) of the control logic (SL) connected to this. On the control logic generates ignition signals for first output (A1) the ignition circuit.
- the first electrode of the flash capacitor (C1) is electrically conductive with a first resistor (R1) the non-inverting input of a first comparator (V1) connected.
- the non-inverting input of the first Comparator (V1) is also across a second resistor (R2) connected to ground.
- the inverting input of the first comparator (V1) is with a reference voltage (UR) connected, the z. B. from a voltage regulator, the not shown here can be generated.
- the exit the first comparator (V1) is with the control input a third switch (T3) connected, the Switching distance on the one hand with ground and on the other hand with one Voltage regulator (SR) connected from the DC voltage of the voltage source (S) a stabilized or regulated DC voltage that is suitable for this is to operate standard electronic components or head for.
- the voltage regulator (SR) is also with the Control input of the first switch (T1) connected.
- a Zener diode Between the control input of the first switch (T1) and the second Terminal (K2) is a Zener diode, which the Voltage limitation is used.
- the flash capacitor (C1) can thus compare (V1) from the voltage supply through the voltage converter (W) the first switch (T1) will be disconnected as soon as the Charge voltage of the flash capacitor (C1) is greater than one is a predetermined value determined by the Voltage divider arrangement (R1, R2) and the reference voltage (UR) is determined.
- Parallel to the second resistor (R2) is in the embodiment shown here Series connection of a fifth resistor (R5) and one fourth switch (T4) arranged, so when reversing the fourth switch (T4) the voltage divider ratio can be changed and different charging voltages for the flash capacitor (C1) are adjustable so that a Control of the bit energy of the flashing light warning system is made possible.
- the second Resistor (R2) also as an adjustable resistor be trained.
- R2 can also be connected in series from resistors and Switches in parallel with the second resistor (R2) be arranged.
- R1, R2 can change the voltage divider ratio (R1, R2) are dispensed with when controlling the Flash energy is not required.
- UR reference voltage
- the control logic (SL) has a second output (A2), the with the control input of a fifth switch (T5) connected is.
- the switching distance of the fifth switch (T5) is on the one hand with mass and on the other hand with the Voltage regulator (SR) connected.
- the voltage regulator (SR) is, as already explained above, electrically conductive connected to the control input of the first switch (T1).
- the third switch (T3) and the fifth switch (T5) are in the embodiment shown here as bipolar Transistors executed. In other embodiments can also switch through (T1, T2, T3, T4, T5) equivalent, different type of switching devices replaced will. In another embodiment, you can some components also in a microprocessor be summarized.
- FIG Flashing light warning device according to the invention described.
- Figure 1 is used as an aid.
- FIG. 2 shows a time diagram with a time axis (t), over which the switching states at the first output (A1) and the second output (A2) of the control logic (SL) is shown are.
- the flash capacitor (C1) and the Auxiliary capacitor (C2) When commissioning the flashing light system, how described above, the flash capacitor (C1) and the Auxiliary capacitor (C2) to a given voltage charged.
- the control logic (SL) at the first output (A1) ignition signals at periodically the same or changing time intervals (Z1).
- the ignition signals are rectangular pulses with a Ignition signal duration (Z2).
- the ignition signal duration (Z2) approximately 50 milliseconds, for example.
- the pulse train on desired output (A1) of the control logic Flash generation achieved, always guaranteed is that a flash of light is generated and this one has predetermined light energy.
- the Flashing light system z. B. by a disturbance of the Aircraft electrical system with a lower DC voltage the voltage source (S), the charging voltage, to switch off the flash capacitor (C1) via the first switch (T1) is not reached. Consequently the auxiliary capacitor (C2) also does not have the voltage fed, which enables this to a high Charge voltage value, which is a reliable Flash initiation ensures.
- the one reliable lightning initiation is ensured with a Lead time (Z4) before time (t1), that is to say Time (t0) generates a signal from the control logic (SL), the first switch (T1) in the non-conductive state switches so that the flash capacitor (C1) of the Voltage converter (W) is disconnected and over the lead time (Z4) only the auxiliary capacitor (C2) from the Voltage converter (w) is charged.
- the lead time (Z4) is, for example, about 10 milliseconds. In the low capacitance of the auxiliary capacitor (C2) is this Sufficient time to keep up with undervoltage Voltage source (S), the z. B.
- the lead time (Z4) can depend on the exemplary embodiments Requirements and in particular according to the Charging capacity of the auxiliary capacitor (C2) larger or be chosen smaller.
- the shutdown period caused by the signal from the control logic (SL) at the second output (A2) is predetermined about 20 in the embodiment shown here Milliseconds. In another embodiment, this switch-off duration (Z3) is also chosen to be larger or smaller will.
- the switch-off period ends at time (t2).
- the Ignition signal begins at time (t1) and ends at that Time (t3).
- the pulse train repeats itself continuously if periodic flash generation is provided. Also with changing flash intervals, one Lead time (Z4) for switching off the first switch (T1) generated.
Landscapes
- Dc-Dc Converters (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Description
Claims (5)
- Lichtblitzwarnanlage, mit einer Spannungsquelle (S), mit einem Sperrwandler, der einen Spannungswandler (W) aufweist, dessen Primärwicklung mit der Spannungsquelle (S) verbunden ist und der eine Ansteuerung (A) für den Sperrwandler (W) aufweist, mit einem Blitzkondensator (C1), der mit der Sekundärwicklung des Spannungswandlers (W) verbunden ist, mit einem Hilfskondensator (C2), der mit der Sekundärwicklung des Spannungswandlers (W) verbunden ist, mit einer Blitzröhre, die mit dem Blitzkondensator (C1) und dem Hilfskondensator (C2) verbunden ist, mit einem Zündschaltkreis für die Blitzröhre, der Zündimpulse in Abhängigkeit von Taktsignalen von einem Taktgenerator (T) erzeugt, mit einem ersten Schalter (T1) in Reihe zu dem Blitzkondensator (C1), der von einem ersten Vergleicher (V1), der die Ladespannung des Blitzkondensators (C1) mit einer Referenzspannung (UR) vergleicht, derart umsteuerbar ist, daß der erste Schalter (T1) in den nicht leitenden Zustand geschaltet wird, wenn die Ladespannung größer ist als die Referenzspannung (UR), dadurch gekennzeichnet, daß der Taktgenerator (T) mit einer Steuerlogik (SL) verbunden ist, daß die Steuerlogik (SL) die Zündsignale für den Zündschaltkreis mit einem Zeitabstand (Z1) und einer Zündsignaldauer (Z2) erzeugt, daß die Steuerlogik (SL) mit einer Vorlaufzeit (Z4) vor dem Zeitpunkt (t1) für die Erzeugung des Zündsignals der Zündsignaldauer (Z2) ein weiteres Signal erzeugt, das den ersten Schalter (T1) für eine Abschaltdauer (Z3) in den nichtleitenden Zustand schaltet.
- Lichtblitzwarnanlage nach Anspruch 1, dadurch gekennzeichnet, daß die Steuerlogik (SL) einen ersten Ausgang (A1) aufweist, der mit dem Zündschaltkreis verbunden ist und daß die Steuerlogik (SL) einen zweiten Ausgang (A2) aufweist, der mit dem Steuereingang des ersten Schalters (T1) verbunden ist.
- Lichtblitzwarnanlage nach Anspruch 2, dadurch gekennzeichnet, daß der zweite Ausgang (A2) der Steuerlogik (SL) Bit dem Steuereingang eines fünften Schalters (T5) verbunden ist und daß die Schaltstrecke des fünften Schalters (T5) den Steuereingang des ersten Schalters (T1) mit Masse oder mit einem Spannungsregler (SR) verbinden kann.
- Lichtblitzwarnanlage nach Anspruch 3, dadurch gekennzeichnet, daß die Steuerlogik (SL) einen dritten Ausgang (A3) aufweist, der mit der Ansteuerung (A) verbunden ist.
- Lichtblitzwarnanlage nach mindestens einem der vorstehenden Ansprüche, gekennzeichnet durch die Verwendung in Flugzeugen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4205871 | 1992-02-26 | ||
DE4205871A DE4205871A1 (de) | 1992-02-26 | 1992-02-26 | Lichtblitzwarnanlage |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0557817A2 EP0557817A2 (de) | 1993-09-01 |
EP0557817A3 EP0557817A3 (en) | 1995-01-18 |
EP0557817B1 true EP0557817B1 (de) | 1998-01-14 |
Family
ID=6452614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93102215A Expired - Lifetime EP0557817B1 (de) | 1992-02-26 | 1993-02-12 | Lichtblitzwarnanlage |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0557817B1 (de) |
DE (2) | DE4205871A1 (de) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU849563A1 (ru) * | 1977-08-23 | 1981-07-23 | Предприятие П/Я М-6002 | Устройство дл световой сигнализации |
SU1008930A1 (ru) * | 1981-12-30 | 1983-03-30 | Всесоюзный научно-исследовательский, проектно-конструкторский и технологический светотехнический институт | Устройство дл питани импульсной газоразр дной лампы |
DE3347229A1 (de) * | 1983-12-28 | 1985-07-18 | Ludger Dr.-Ing. 5628 Heiligenhaus Mense | Schaltungsanordnung fuer stroboskope |
SU1283824A1 (ru) * | 1985-04-18 | 1987-01-15 | Rodionov Leonid V | Устройство дл управлени импульсными газоразр дными лампами |
DE3917062A1 (de) * | 1989-05-26 | 1990-11-29 | Hella Kg Hueck & Co | Lichtblitzwarnanlage |
DE4015401C1 (de) * | 1990-05-14 | 1991-11-14 | Hella Kg Hueck & Co, 4780 Lippstadt, De | |
DE4015402A1 (de) * | 1990-05-14 | 1991-11-21 | Hella Kg Hueck & Co | Lichtblitzwarnanlage |
-
1992
- 1992-02-26 DE DE4205871A patent/DE4205871A1/de not_active Withdrawn
-
1993
- 1993-02-12 EP EP93102215A patent/EP0557817B1/de not_active Expired - Lifetime
- 1993-02-12 DE DE59307961T patent/DE59307961D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0557817A3 (en) | 1995-01-18 |
EP0557817A2 (de) | 1993-09-01 |
DE4205871A1 (de) | 1993-09-02 |
DE59307961D1 (de) | 1998-02-19 |
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