CN2385927Y - Detecting alarm device for vehicle light - Google Patents

Abstract

The utility model relates to a detecting alarm device for motor vehicle lamps, which is designed to enhance overloading performance and automation, and the utility model comprises a stabilized voltage power supply, a detecting circuit, an alarm circuit and a detection circuit. The utility model is characterized in that a secondary coil of a transformer of a detecting oscillating circuit is formed in the method that conducting wires are wound on magnetic material; one end of the secondary coil is grounded through a capacitor, and the other end of the secondary coil is connected with the vehicle lamps to form an AC loop; besides, a primary coil is connected with the positive feedback end of an oscillating circuit. The utility model has the advantages of good overloading performance, high automation, convenient operation, etc. The utility model is suitable for the vehicle lamps.

Description

Vehicular lamp detection alarm device

The utility model relates to Vehicular lamp detection alarm device technique field.

Car light detection alarm device purpose is to be in operation because of light et out of order initiation traffic accident design-calculated detecting device for fear of self-propelled vehicle.Chinese patent also has the report of this respect, is that 94218499.8 Vehicular lamp automatic tester comprises 16 alignment detection circuits as the patent No., scans circuit, decision circuit, oscillating circuit, buzzer phone, display circuit, its circuit more complicated and overload performance are also weaker.As the automatic detection alarm device of the car bulb fault of the patent No. 91232894.0, it need be pressed the detection button with staff and could detect, and brings inconvenience to people.

The purpose of this utility model is to provide the Vehicular lamp detection alarm device that a kind of overload performance is good, can detect automatically.

Machine art scheme of the present utility model is achieved in that it comprises that the output signal end of constant voltage power suspply, testing circuit, warning circuit, testing circuit connects the signal input part of warning circuit, it is characterized in that the transformer secondary output coil that detects oscillating circuit is formed by lead coiling on magnetic material, be serially connected in the former circuit between car light and the lighting switch, and one end pass through capacitor grounding, another termination car light constitutes ac circuit, and primary winding connects the positive feedback signal input end of oscillating circuit through electric capacity simultaneously.

Above-mentioned oscillating circuit is a Wien-bridge oscillator, and the oscillation transformer primary winding in the oscillating circuit connects the emitter positive feedback signal input end of the first order by electric capacity.

Its mouth of above-mentioned oscillating circuit is connected to comparator behind rectifying and wave-filtering, comparator output connects inverting amplifier, the deliver newspaper input end of alert circuit of the low level control signal of its output.

Above-mentioned testing circuit and warning circuit are made car light detection module and acousto-optic alarm module respectively, and the power lead of intermodule, signal wire (SW) employing activity patch connect.

It overcomes the following shortcoming that exists in original technology, and overload performance is poor, when car light fragile during in working order because of reason short circuits such as vibrations.Or can only when working, car light detect.Or numerous and diverse poor reliability of circuit structure and installation inconvenience.With heavy gauge wire be wound on the magnetic material output primary it be serially connected in the former circuit between car light and the lighting switch, slightly lack because of lead like this and can not produce additional voltage drop, and the large power supply that is produced when circuit or car light are short-circuited because of reasons such as vibrations can not make its damage yet former circuit.Between output primary input end and ground wire, inserted cond, another termination car light of output primary, constituted ac circuit by cond, output primary, car light, grounding jumper like this, this loop does not just exist yet when car light damages open circuit, by primary winding, the detection oscillating circuit of formations such as transistor capacitance just begins the survey effect of shaking like this.Cutting the end has avoided damaging the traffic accident that causes because of car light.

Description of drawings:

Fig. 1, car light detection module circuit diagram;

Fig. 2, car light sound and light alarm module circuit diagram;

Fig. 3, car light detection alarm device scheme of installation.

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in the figure, become with a sound and light alarm module combinations by the identical detection module of four block structures for the utility model easy for installation.Detection module is installed in respectively by the self-propelled vehicle left-right and front-back car light group, and it is serially connected in the former circuit between car light and the lighting switch, links by double wired conductor and the alarm module that is installed in the operator's compartment.Car light detection alarm device is controlled by switch, as long as whether switch detects all car lights and damage once opening, makes navigating mate know the present situation of car light before starting or in travelling.

The utility model is respectively each car light according to actual car light number an oscillation test head is installed.An oscillation test principle of work is as follows, has constituted Wien-bridge oscillator by transistor BG11, BG12 resistance R 11-R16 capacitor C 13-C14.When the moment that the circuit energized is started working, thereby the e pole tension rising of supposing c pole tension rising just the causing BG12 of BG11 makes the e pole tension rising of BG11 that the c pole tension of BG11 is raise again by R14, C13.As long as the circuit amplification quantity is enough, circuit is with regard to starting of oscillation work, and the circuit magnification factor to be resistance by R11, R12, R14, R16 determined that the resistance of controlling R11, R12, R14, R16 makes the firm starting of oscillation of circuit.T1 is a coupling transformer.Primary winding L1 is connected on the e utmost point (feedback signal input end) of BG11 by C12, and it has shared feedback signal.Because of the big L1 of coupling transformer inductance value is very little to the feedback signal decay, circuit oscillation is normal, and by coupling L1 feedback signal decay increase is made the too small circuit failure of oscillation of positive feedback signal when L2 is connected to load when output primary L2 opens a way.

With the one headlight is that example describes testing process.When car light just often, output primary L2 on the magnetic material has constituted ac circuit by capacitor C 11 grounding jumpers and car light by the heavy gauge wire string, because of the existence of car light (resistance) makes coupling transformer primary winding L1 to the positive feedback signal hyperabsorption, make oscillating circuit at the failure of oscillation state.And secondary loop L2 opens a way when car light damages, decay diminishes L1 to positive feedback signal, circuit produces the collecting electrode output AC signal of vibration from BG12, filtering makes comparator IC4 output high level through D11 rectification C03, through the anti-phase amplification of BG01, from mouth output low level control signal, make in the sound and light alarm module corresponding indicator lamp luminous, the position that indication fault produced, cause the GB2 conducting because of the luminotron conducting makes R2 pressure drop increase, through the IC1 voltage stabilizing, ic chip 2 gets electric work, send beautiful warning music, remind navigating mate in time to repair.Having constituted constant-current supply by D2, BG1, R1, R2 is to be fit to normal operation under the multiple voltage for indicating circuit.D11-D41 has formed gate circuit and just exported control signal as long as there is any one headlight to damage in the car light group.

Claims (4)

1, a kind of Vehicular lamp detection alarm device, it comprises that the output signal end of constant voltage power suspply, testing circuit, warning circuit, testing circuit connects the signal input part of warning circuit, the transformer secondary output coil that it is characterized in that detecting in the oscillating circuit is formed by lead coiling on magnetic material, be serially connected in the former circuit between car light and the lighting switch, and one end pass through capacitor grounding, another termination car light constitutes ac circuit, and primary winding connects the positive feedback signal input end of oscillating circuit through electric capacity simultaneously.

2, Vehicular lamp detection alarm device as claimed in claim 1 is characterized in that described oscillating circuit is a Wien-bridge oscillator, and the transformer in the oscillating circuit is by electric capacity and connect the emitter positive feedback signal input end of the first order.

3, Vehicular lamp detection alarm device as claimed in claim 1, it is characterized in that described output end of oscillating circuit is connected to comparator behind rectifying and wave-filtering, comparator output connects inverting amplifier, the deliver newspaper input end of alert circuit of the low level control signal of its output.

4, Vehicular lamp detection alarm device as claimed in claim 1 is characterized in that described testing circuit and warning circuit make car light detection module and acousto-optic alarm module respectively, and the power lead of intermodule, signal wire (SW) employing activity patch connect.

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