CN2068930U

CN2068930U - Detecting device for carriage light

Info

Publication number: CN2068930U
Application number: CN 90202258
Authority: CN
Inventors: 徐同一
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-03-02
Filing date: 1990-03-02
Publication date: 1991-01-09

Abstract

The utility model provides a detecting device for carriage light whose input lead wire is arranged on the switch contact of a carriage lamp and ground wire is connected with the common ground wire of the carriage lamp. So the carriage lamp is serially connected with voltage division resistance to make the voltage division sampling, and the carriage lamp is burnt, and the resistance of the voltage division resistance is changed. A voltage comparator generates a carriage lamp detecting control signal, and controls the alarm and the display. When the detecting device for carriage light detects, a detector switch is opened, and whether each carriage lamp is normal can be simultaneously displayed. As long as the failure is generated, the detecting device for carriage light alarms and display the failure position. The detecting device for carriage light has simple structure, low cost, and rapid and convenient detection on the carriage lamp.

Description

Detecting device for carriage light

The utility model relates to a kind of vehicle light detecting device, it is installed in the operator's compartment, its each lead-in wire is connected on the contact of the corresponding switch of each car light, power lead, ground wire join with storage battery, the common ground of car light respectively, whether it can demonstrate all each car lights simultaneously normal, and directly demonstrate the not under command light position.

Present various vehicles had not also adopted any device that Lighting System is detected, and detected car light and also had only and open car light one by one, observed under car, saw whether each car light is luminous normal, detected both inconveniently, lost time again.

Task of the present utility model provides a kind of being installed in and opens switch in the operator's compartment and can show simultaneously whether all car lights normally reach the vehicle light detector of not under command light position.

Task of the present utility model is finished as follows: it is a device of surveying fault according to the principle that car light burns change in resistance, and it is made up of the voltage comparator and the car light fault display part that each group car light are connected in series divider resistance respectively, produce failure control signal.

This detector arrangement is simple, cost is low, and car light is detected not only soon but also convenient.

Describe concrete structure of the present utility model in detail below in conjunction with accompanying drawing and two embodiment.

Fig. 1, general automobile lighting system electrical schematic diagram.

Fig. 2, embodiment 1 electrical schematic diagram.

Fig. 3, embodiment 1 oblique drawing.

Fig. 4, embodiment 2 electrical schematic diagrams.

Fig. 5, embodiment 2 oblique drawings.

General automobile lighting system circuit structure as shown in Figure 2, L ₁To L ₈Be respectively country beam, passing light, left-hand rotation lamp, right-hand rotation lamp, stoplight stop lamp, lampet, taillight, fog lamp etc., the equal ground connection of an end, the other end is by the K switch of each lamp ₁To K ₈Join power supply E negative earth with the positive pole of power supply E.Embodiment 1 is liquid crystal display vehicle light detector (seeing Fig. 2,3).Embodiment 2 is diode displaying vehicle light detector (seeing Fig. 4,5).Two embodiment form by serial connection divider resistance sampling part 10, voltage comparator part 20 and car light fault display part 30, also can insert fault alarm 40 from each mouth of voltage comparator part 20, produce alarm sound by it.Divider resistance sampling part 10 draw lead A ^' _nInsert car light L respectively _nTo K switch _nContact A _nOn, make divider resistance R _nWith car light L _nThe common ground and the car light ground wire of this detector joined in series connection, and detector power supply and vehicle light power supply join, by potential device W _nComparative voltage V is provided _WnIts value is selected in (E)/(R+r/2) r/2 in (Er)/(R+r) scope, R _nWith car light internal resistance r _nDividing potential drop inserts voltage comparator I _nAn input end (n is 1,2,3 ...).

When detecting, the K switch of device is closed, at car light just often, comparator I _nMouth B _nBe high level, IC is a NAND gate, output low level, and aerotron GB ends, and annunciator Y does not report to the police.

In diode displaying vehicle light detector, green LED Dn is bright, represents that each lamp is normal, otherwise through the not gate paraphase, makes red light emitting diodes Dn ' bright, shows that the car light of relevant position burns.If after the disintegration of filament was arranged, comparator In mouth Bn was a low level, NAND gate IC exports high level, aerotron GB conducting, and annunciator Y reports to the police.

Show in the vehicle light detector at the liquid crystal Chinese character, square-wave generator 33 output symmetrical square wave signals, one road public electrode to Liquid Crystal Display (LCD) 32, another road is input to the C end of Exclusive-OR gate (XOR gate) 31, when car light just often B be high level, Exclusive-OR gate (XOR gate) output is anti-phase with square-wave signal C, all shows all the elements, when one or more has breakdown signal, B is a low level, Exclusive-OR gate (XOR gate) output and square-wave signal C homophase, telltale 32 relevant positions do not show that or not or not is position of fault.This vehicle light detector in actual applications, and is respond well, detects accurately and reliably.

Claims

1, a kind of indoor vehicle light detector of driver driving that is installed in, it is used for measuring the read out instrument that car light damages change in resistance, it is characterized in that it is made up of the sampling part 10 that each group car light is connected in series divider resistance respectively, the voltage comparator 20 and the car light fault display part 30 that produce control signal.

2, vehicle light detector according to claim 1 is characterized in that car light fault display part 30 is made up of Chinese character LCD panel 32, square wave signal generator 33 and Exclusive-OR gate (XOR gate) 31.

3, vehicle light detector according to claim 1 is characterized in that car light display part 30 is made up of several groups of dichromatic LEDs, and luminotron of the same colour directly connects the mouth of voltage comparator 20, and another look luminotron connects a not gate paraphase.

4, vehicle light detector according to claim 1 is characterized in that voltage comparator 20 each mouth insert fault alarm 40.