DE2328982B2

DE2328982B2 - Device for monitoring lamps in vehicle lights, in particular in vehicle lights

Info

Publication number: DE2328982B2
Application number: DE19732328982
Authority: DE
Inventors: Wolf 7142 Marbach Seitter; Wilhelm 7121 Loechgau Trinkner
Original assignee: SWF Spezialfabrik fuer Autozubehoer Gustav Rau GmbH
Current assignee: SWF Auto Electric GmbH
Priority date: 1973-06-07
Filing date: 1973-06-07
Publication date: 1975-05-28
Also published as: DE2328982A1

Description

auf den Glühfaden 13 ausgerichtet. Der Fotowider- «aid 15 erhält somit eine optimale Lichtmenge, ehne daß er von Fremdlicht wesentlich beeinflußt werden kann. Zusätzlich kann das der Glühlampe 12 augewandle Ende der Hülse 14 durch eine lichtdurchlässige, auf das Lichtspektrum der Glühlampe 12 abgestimmte Kappe 16 abgedeckt werden, um die Beeinflussung durch Fremdlicht noch weiter einzudämmen. Der Reflektor 11 und die Hülse 14 sind vorzugsweise einstückig aus Kunststoff hergestellt.aligned with filament 13. The Fotowider- aid 15 thus receives an optimal amount of light, without that it can be significantly influenced by extraneous light. In addition, that of the incandescent lamp 12 the end of the sleeve 14 through a translucent, on the light spectrum of the incandescent lamp 12 matched cap 16 are covered to the To further reduce the influence of extraneous light. The reflector 11 and the sleeve 14 are preferably made in one piece from plastic.

In Abänderung der Fig. 1 kann der Fotowiderstand auch außerhalb des Reflektors angeordnet werfen, wobei ein Isolierschlauch und ein geschwärzter Lichtdurchlaßkanal nötig wären.In a modification of FIG. 1, the photoresistor also throw placed outside the reflector, with an insulating tube and a blackened one Light transmission channel would be necessary.

Sinkt der von der Glühlampe 12 abgegebene Lichtstrom unter einen Mindestwert (beispielsweise 440 Lumen bei einer Glühlampe mit einer Leistung von 21 W). so wird dies vom Fotowiderstand 15 erfaßt, der die in F i g. 2 dargestellte Auswerteschalfung entsprechend steuert.If the luminous flux emitted by the incandescent lamp 12 falls below a minimum value (for example 440 lumens for an incandescent lamp with an output of 21 W). so this becomes 15 from the photo resistor detected that the in F i g. 2 shown evaluation circuit controls accordingly.

In Fig. 2 ist ein zweistufiger, galvanisch gekoppelter Transistorverstärker in Emitterschaltung dargestellt, der Transistoren Ti, 72, Emitterwiderstände Λ 3, R4. einen Kollektorwiderstand R2> für den ersten Transistor 71, eine im Kollektorkreis des zweiten Transistors Tl angeordnete Kontrollampe KL und einen Basisspannungsteiler für den ersten Transistor Π aufweist. Der Basisspannungsteiler besteht aus einer zwischen der Basis des Transistors 7"I und dem Minuspol - U_B der Speise^pannungsquelle angeschlossenen Parallelschaltung aus dem Fotowiderstand 15 und einem veränderbaren Widerstand R 1 und ferner aus einem zwischen der Basis des Transistors 71 und dem Fußpunkt O liegenden Widerstand R 2.In Fig. 2, a two-stage, galvanically coupled transistor amplifier is shown in emitter circuit, the transistors Ti, 72, emitter resistors Λ 3, R 4. a collector resistor R2> for the first transistor 71, a control lamp KL arranged in the collector circuit of the second transistor Tl and a Has base voltage divider for the first transistor Π. The base voltage divider consists of a parallel circuit connected between the base of the transistor 7 "I and the negative pole - U _{B of} the supply ^ voltage source, consisting of the photoresistor 15 and a variable resistor R 1 and also of a resistor R 1 between the base of the transistor 71 and the base point O Resistance R 2.

Bei ausreichendem Lichtstrom ist der Fotowiderstand 15 niederohmig, so daß der Transistor 71 leitend gesteuert und demzufolge der Transistor 72 gesperrt wird. Die Kontrollampe ZiL, die im übrigenIf the luminous flux is sufficient, the photoresistor 15 has a low resistance, so that the transistor 71 controlled conductive and consequently the transistor 72 is blocked. The control lamp ZiL, which by the way

ίο auch durch einer. Summer oder ein sonstiges Anzeigemittel ersetzt werden kann, bleibt dunkel. Sinkt nun der Lichtstrom unter einen vorgeschriebenen Mindestwert, so wird der Transistor 71 gesperrt, weil der Widerstandswert des Fotowiderstands 15 zunimmt. Der Transistor 72 wird daher leitend, und die Kontrollampe KL leuchtet auf. Diese Überwachung wird selbstverständlich nur dann wirksam, wenn die Glühlampe eingeschaltet ist.ίο also by one. Buzzer or other display means can be replaced, remains dark. If the luminous flux now falls below a prescribed minimum value, the transistor 71 is blocked because the resistance value of the photoresistor 15 increases. The transistor 72 is therefore conductive and the control lamp KL lights up. This monitoring is of course only effective when the incandescent lamp is switched on.

Mit dem veränderbaren Widerstand R1 können die .AnspreciiempfindJichkeit der Auswerteschaltung und die Toleranzen der Fotowiderstände ausgeglichen werden.With the variable resistor R 1, the sensitivity of the evaluation circuit and the tolerances of the photoresistors can be compensated.

Fotowiderstände, die funktionsmäßig gleichen Lampen zugeordnet sind, beispielsweise der linkenPhoto resistors that are functionally assigned to the same lamps, for example the left one

und rechten Bremsleuchte, können auf dasselbe Anzeigemittel einwirken, weil die zugehörigen Glühlampen meisten gemeinsam ausgewechselt werden.and right brake light can act on the same display device because the associated light bulbs most of them are exchanged together.

Ferner ist es möglich, eine analoge Anordnung wie die beschriebene zur Überwachung eines vorgeschriebenen Lichtstromhöchstwertes vorzusehen.It is also possible to use an arrangement similar to that described for monitoring a prescribed Maximum luminous flux to be provided.

Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings

Claims

It is known that the switching on of lamps in motor vehicles can be monitored by claims: Control lamps on the dashboard also switched on α ~ nsmit Ut iedoch not yet certain that the

1. Device for monitoring lamps ^ rde "^ * ¹ JJJJ ^ ¹ _{also actually} i, _run . In vehicle lights, especially in motor vehicle lamps. ^ ^ Vehicle lights, in which a light-sensitive egg- ^Desh f ° \ ? ^S \ u ™ ° _nen Lichtleits from or placed on Lichiment near each lamp is * "* ™ d" ber ^ inenLgefeld on the dashboard and the electrical output signal of this le light; tfasern on s display ₁₉ p7 _{85) A?} sensitive element to a display means transfer ^ ^Uen ^ _e rf _{aß jed} och nu'r den'erre * - controls, characterized in that io such over * cnungu> j _fe between light-sensitive element (15) and th, and ^ jmch * en possible ^ f ^ amp * _Hn _ display means (KL) an evaluation circuit Wstersehen.dBUi "» - Lamoen in force (F i _g . ⁸ 2) is switched on, which when falling below [^ !, e ^ ht ^ Ä ^

a specified minimum luminous flux value of the fan tools ucmc n, uc. , "Omrrinpt kt nnH

overnight lamp responds and the display element near each ^L ™ ^ * "* ™ ^« ™ £ " ^d

medium (KL) switches on. the output signal of this, perceptual sensation

2. Device according to claim 1, characterized in that a display means ^steue ";

indicates that the central axis of the light em- It is also mi ubenvaJ ^ ^ob ^ m-

Sensitive element on the burner (13) switched light emits or not ^ on di _t s _t

4th lamp is aligned . “Only the failure of a lamp will be wise” ngcz Jgt

3. A device according to claim 2, characterized in that an age-dependent warning often occurs that the light-sensitive element or a contamination of the lamps m Kratfahrfci a sleeve (14) on which the lamp is worn, which leads to the requiredLrl. _The turned end is arranged. The minimum luminous flux is undershot.

4. Device according to claim 3, characterized in that 5 other road users can be endangered indicates that the sleeve (14) constituent part It is the object of the invention to increase de tines reflector for the lamp is. Traffic safety lamps m vehicle lights on

5. Device according to claim 3 or 4, that a prescribed minimum luminous flux to uber-Hurch characterized that the pull of the lamp watch. λ-α ,, _γ ^ ,> ,, ";"»" turned the end of the sleeve through a translucent cap (16) is covered. _is activated pointing means an evaluation circuit,

6. Device according to one of claims 1, when falling below a predetermined Lithtbis 5, characterized in that the evaluation minimum current value of the monitored lamp is

lih iht nd the display means switches on through

to 5, characterized in that the evaluations are at least slromm

Circuit through a two-stage, galvanic 35 speaks and the display means switches on By coupled transistor amplifier (Γ1, Tl) in this interconnection and design of the As emitter circuit is formed that the light evaluation circuit is achieved that the display means sensitive element between the base of the first both the failure as well as the sinking of the L.ch -

b Md l

coupled transistor amplifier (Γ1, Tl) is formed in this interconnection and design of the As emitter circuit, that the light evaluation circuit is achieved that the display means sensitive element between the base of the first both the failure and the sinking of the L.ch transistor (Γ1) and the current with the collector below a predetermined minimum value as connected supply voltage pole (-U _B ) is 40 indicates errors.

And that the display means (KL) in the collector- It is between _? .r in a completely unfamiliar field

circle of the second transistor (72) is arranged. Hch an arrangement with a twilight switch

7. Device according to claim 6, characterized in that a light-sensitive element has a indicates that the light-sensitive EIe includes an evaluation device connected downstream. Falls ment a variable resistor (Rl) parallel 45 the illuminance of the light-sensitive EIeeeschalts is nientes below a given minimum value,

8. Device according to one of claims 1, the evaluation circuit responds and switches fcis 7, characterized in that the light-determined, preferably lighting circuits a. sensitive elements that functionally The task set at the beginning was, however, despite The same lamps are assigned to the same 50 of this twilight switch only with the display means act. solved according to the combination. That’s the first time

9. Device according to one of claims 1 possible, any brightness values of a force 8, characterized in that in addition vehicle light according to the different an analogous arrangement for the monitoring of a determinations in different countries exactly too Record the prescribed maximum luminous flux value and display it on a display instrument, ! is seen. The invention will now be based on an exemplary embodiment explained in more detail. It shows

Fig. 1 shows a vehicle lamp with an on the rear

flektor attached photo resistor and

60 Fi g. 2 shows a circuit arrangement of one of the photoresistor controlled evaluation circuit.

The invention relates to a device for transferring In Fi g. 1 is an incandescent lamp in a reflector 11

monitoring of lamps in vehicle lights, especially 12 used, with the filament 13 in the special in motor vehicle lights, in which a light focal point of the reflector 11 is located. The reflector Sensitive element in the vicinity of each lamp is provided with a sleeve 14 in which a photo is arranged and the electrical output signal resistor 15 is arranged, on which the this light-sensitive element has a display incandescent lamp 12 cut end. The central axis medium controls the sleeve 14 and the photo resistor 15 is dabe.