CN2161511Y - Non-electric contact type monitor for vehicle lamp - Google Patents

Abstract

The utility model relates to a monitoring alarming device of a vehicle signal light, which is designed for the working conditions of a non-electric contact type sense vehicle lamp. The utility model is composed of a supervisory lamp corresponding to the signal light and a signal light condition monitoring circuit, wherein, a signal light state sensing device is a sensor using the direct-current magnet sense principle. The signal light state sensing device comprises a divided soft magnetic core passing through a lamp conducting wire and making the conducting wire as a control coil, and a signal coil curl arranged on the magnetic core; the DC biasing current and the low-frequency AC current causing the magnetic core to be in the threshold saturation state pass through the signal coil curl, the electric current in the control coil curl leads to the impedance variation of the signal coil curl, a detection circuit synchronously indicates the signal light state with the supervisory lamp.

Description

Non-electric contact type monitor for vehicle lamp

The utility model relates to a kind of signalling alarm equipment, provides a kind of visible and can listen the detection alarm device of indication for the vehicle signal lamp failure more precisely.

Multiple signal lamp is equipped with on various types of automobiles, as headlight, lampet, steering indicating light, stoplight stop lamp, fog lamp, backing-up lamp, registration mark light etc., automobile under steam, in a single day signal lamp breaks down, chaufeur should be able in time be understood failure condition, to avoid causing traffic accident because of signal lamp is malfunctioning.

Existing car light detection alarm device for a kind of signal lamp arrangement one cover observation circuit and monitor lamp, when the signal lamp et out of order, is lighted monitor lamp and is driven acoustics circuit and send chimes of doom.

Observation circuit is by sensing device and sound, the light alarm control circuit is formed, sensing device comprises monitoring element and fault detection signal circuit thereof, monitoring element generally is serially connected in the signal lamp circuit, as seal in reed switch pipeline circle in the car light circuit, relay coil or seal in divider resistance etc., seal in monitoring element and need cut off original car light circuit, the problem of bringing thus is: the integraty that has destroyed former car light circuit, make some users especially be difficult to accept in the automobile-used family of high gear, on-the-spot clear the circuit is welded, fixing, also increased the enforcement difficulty, because damaging, monitoring element also can cause car light work mal again, cause sound, light is reported to the police, thereby artificially increased the trouble point, when et out of order is reported to the police, the repair and maintenance personnel will differentiate the fault that belongs to former car light circuit and car light thereof or the fault of monitoring device itself, and therefore this design plan that seals in monitoring element in the car light circuit is difficult for entering the practical stage.

The purpose of this utility model is a kind of non-formula car light monitor that electrically contacts of design, needn't also can carry out sound and light alarm to car light line fault and signal lamp failure thereof exactly by cutting off the means that the car light circuit seals in monitoring element.

Basic functional principle of the present utility model is to adopt direct solenoid sensing scheme, realizes by non-the electrically contacting property sensing of DC current to impedance.

The non-formula car light monitor that electrically contacts of the present utility model, by with cooresponding monitor lamp of signalling light for vehicle and signal lamp condition monitoring circuit, described signal lamp condition monitoring circuit comprises signal lamp state sensing device and monitor lamp alarm detection circuit composition, it is characterized in that: described signal lamp state sensing device is a variometer, by pass the signalling light for vehicle lead and with this lead be the variometer magnetic core of control coil and on magnetic core, the variometer signal coil that is connected with DC magnetic bias current and low-frequency ac electric current forms.

The effect of DC magnetic bias current is to make the variometer magnetic core be in critical saturation conditions in the variometer signal coil, when the master cock that is connected in series with signalling light for vehicle, direct supply is closed, there is direct current (DC) to pass through in the signalling light for vehicle lead, be in the magnetic core control coil electric current to be arranged, magnetic core enters the magnetic saturation state, causes variometer signal coil inductance value and impedance significantly to diminish; And when exist in the signals of vehicles lamp driver in fault, the control coil no current by the time, then no resistance changes and takes place.Monitor lamp alarm detection circuit is by detecting the impedance variations of variometer signal coil, and the mode of operation and the signalling light for vehicle of control monitor lamp are synchronous, also can assist and establish the audible alarm circuit warning of sounding simultaneously.

Describe technology of the present utility model in detail below in conjunction with the embodiment accompanying drawing, the embodiment circuit contains 8 monitoring means, and each monitoring means contains two monitor lamp, two variometers, two signal lamps of corresponding monitoring, and 8 monitoring means can be monitored 8 kinds of 16 signal lamps altogether.

Accompanying drawing 1 is the non-formula car light monitoring device variometer structural representation that electrically contacts.

Accompanying drawing 2 is the non-formula car light monitor circuit schematic diagram that electrically contacts.

Referring to accompanying drawing 1, variometer M is made up of car light lead L1, split type soft magnetic material magnetic core E and signal coil L2, variometer M makes the state sensing device, do not have with former car light circuit and to electrically contact, magnetic core E is split type, and the magnetic core that only needs during installation to be wound with signal coil L2 is enclosed within on the car light lead L1, get final product with resilient Plastic Parts is fastening, need not to disconnect the car light wire bonds, also can not increase new trouble point, thereby advantage is tangible.

Referring to accompanying drawing 2, monitoring means A2-A8 has with the identical circuit structure of monitoring means A1 frame among Fig. 2, and therefore A1 frame circuit working principle only is described.

By master cock K, signalling light for vehicle ED1(ED2) and car light lead L1 serial connection or loop.

Monitor lamp alarm detection circuit comprises voltage comparator, the reference potential circuit and the inductance coil that provides pure oscillator, amplifirer, impedance conversion transformer and the blocking-up of DC magnetic bias current and low-frequency ac electric current to exchange to variometer signal coil L2 of reference voltage are provided to voltage comparator, low-frequency ac dividing potential drop on the variometer signal coil L2 send voltage comparator one end through current rectifying and wave filtering circuit output, voltage comparator output connects monitor lamp, and the inductance coil that blocking-up exchanges is serially connected between the low-frequency ac source of DC source and variometer signal coil.Voltage comparator is output as active potential when static, and monitor lamp extinguishes, and when signal lamp was arranged, voltage comparator was output as high potential, lighted monitor lamp, lights if this moment, monitor lamp was asynchronous, represents that then the signal lamp circuit breaks down.

Among the figure, transport and placing device IC1 and peripheral cell thereof are formed Wen's bridge pure oscillator, produce low-frequency ac signal, behind IC4 power amplifier and voltage transformer T transforming impedance, the reference potential circuit of feeding monitoring means A1-A8 respectively and forming by L3, D3, C8, W2, R10, the effect of inductance coil L4 is that blocking-up exchanges, in order to avoid alternating current is by power supply short circuit.When low-frequency ac passes through W2, L3, on L3, produce pressure drop, through D3, C8 rectifying and wave-filtering, the B point obtains reference voltage V B, is added to the input anode of voltage comparator ic 2, IC3.In like manner, the low-frequency ac dividing potential drop on the variometer signal coil L2 is through D4(D5), C9(C10) rectifying and wave-filtering, C point, D point obtain vdc VC, VD.When static, make VC＞VB, VD＞VB, voltage comparator ic 2, IC3 mouth are active potential, can not light with the cooresponding monitor lamp-LED 1 of signal lamp ED1, ED2, LED2, clearing lamp is in and extinguishes state.

Closed master cock K flows through direct current among the car light lead L1, and ED1, ED2 light, because the impedance of L2 reduces, and the low-frequency ac dividing potential drop on it reduces, C, D point current potential drops to VB＞VC, VB＞VD simultaneously, IC2, IC3 are output as high potential, light monitor lamp LED1, LED2, realize indication synchronously.IC2, IC3 are operated in open loop situations, and magnification factor can be thought infinity, thus its mouth high potential near power line voltage, active potential near zero voltage.

The utility model also aided design audible alarm circuit.Signalling light for vehicle generally all has symmetry, and a pair of signal lamp generally can not damage in a flash together, that is to say if ED1, ED2 damage (or blown fuse or master cock K damage) simultaneously, LED1, LED2 go out simultaneously, but ED1, ED2 can not damage simultaneously generally speaking, so LED1, LED2 can not work simultaneously yet.Present embodiment auxiliary sound warning circuit just is based on above-mentioned true design-calculated, comprise the Exclusive-OR gate (XOR gate) IC5-IC15 that is positioned at behind each monitoring means, gather the Exclusive-OR gate (XOR gate) output signal or door IC6, monostable circuit and the buzzer phone FM circuit formed by joint denial gate IC7, IC8, when ED1, ED2 light simultaneously or extinguish (almost not having) simultaneously, the mouth of IC2, IC3 etc. also is high potential or active potential simultaneously, and the Exclusive-OR gate (XOR gate) output state is " 0 ", and voiceless sound is reported to the police.When damaging for one in two signal lamps, two voltage comparator output states are inconsistent in the same monitoring means, and the Exclusive-OR gate (XOR gate) output state is " 1 ".Or door IC6 gathers alerting signal from 8 monitoring means, promotes monostable circuit, buzzer phone FM reported to the police in the predefined monostable time, and C14 is start zero setting electric capacity among the figure.

Because this monitor adopted unique direct solenoid sensing mode, varinodr and former car light circuit do not have and electrically contact, and compare with existing same device, have obvious advantage, at first do not destroy circuit integrity, and the user easily accepts; Magnetic core is that split-type structural is easy to install; Monitor is installed can not increase new trouble point, even monitor has fault also can not affect former car light circuit, and one and break down, also be easy to tell monitor fault or the fault of former car light circuit.

Claims (4)

1, a kind of non-formula car light monitor that electrically contacts, by forming with cooresponding monitor lamp of signalling light for vehicle and signal lamp condition monitoring circuit, described signal lamp condition monitoring circuit comprises signal lamp state sensing device and monitor lamp alarm detection circuit, it is characterized in that: described signal lamp state sensing device is a variometer, by pass the signalling light for vehicle lead and with this lead be the variometer magnetic core of control coil and on magnetic core, the variometer signal coil that is connected with DC magnetic bias current and low-frequency ac electric current forms.

2, the non-formula car light monitor that electrically contacts according to claim 1 is characterized in that described variometer magnetic core is split type soft-magnetic material magnetic core.

3, the non-formula car light monitor that electrically contacts according to claim 1, it is characterized in that described monitor lamp alarm detection circuit comprises voltage comparator, the reference potential circuit of reference voltage is provided and the pure oscillator of DC magnetic bias current and low-frequency ac electric current is provided to the variometer signal coil to voltage comparator, amplifirer, the inductance coil that impedance conversion transformer exchanges with blocking-up, variometer signal coil output low frequency alternating-current voltage/AC voltage send voltage comparator one end through current rectifying and wave filtering circuit, voltage comparator output connects described monitor lamp, and the inductance coil that blocking-up exchanges is serially connected between the low-frequency ac source of DC source and described variometer signal coil.

4, the non-formula car light monitor that electrically contacts according to claim 1 is characterized in that also comprising the auxiliary sound warning circuit, and being linked in sequence by Exclusive-OR gate (XOR gate) or door, monostable circuit and buzzer circuit forms.

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