CN2421659Y - Acoustooptic alarm for open circuit and short circuit of automobile - Google Patents

Abstract

The utility model relates to a sound-light alarm device for the open circuit and the short circuit of an automobile, which comprises a fuse and a power supply. The utility model is characterized in that the sound-light alarm device for the open circuit and the short circuit of an automobile also comprises a light display, a sampling circuit, a phase inverter, an isolator, a divider circuit, an isolating circuit, a load, a discrimination display circuit, a divider sample circuit and a sound alarming circuit. The elements have the electric connection relations that the fuse is connected with the power supply; the light display is connected with the fuse in parallel; the sample circuit is taken out from the lower ends of the two parallel circuits and is connected with the phase inverter in series; the phase inverter is connected with the isolator in series and the phase inverter is connected with the divider circuit in series finally; signals are got mutually from the center of the divider circuit and thus a trumpet is pushed to sound. The utility model has the advantages of clear reflection of the on-off state of the fuse, convenient replacement and easy maintenance.

Description

The automobile weak point acoustic-optic alarm that opens circuit

The utility model relates to a kind of circuit protection device, specifically is meant the fuse-link socket and the corresponding device thereof of the band sound and light alarm demonstration of using on automobile.

Fuse sockets on the common automobile, can only be as the socket of automobile fuse blade, can not display automobile under steam which only or which fuse sheet fuse, need your one one inspection one by one, if check untimelyly, fuse body is blown, and occur with situations such as circuit breaker, in the case, inspection is got up very time-consuming.If the above fault of two-way is arranged simultaneously, general driver is unfamiliar with electric appliance circuits, just has no way of doing it.Chinese patent ZL9823965.2, automobile can produce electric arc with the fuse that band shows in order to prevent the fuse-link transcient short circuit time, add a withstand voltage high diode, promptly work as resistance and can prevent overvoltage again,, need make special-purpose integrated device and could realize because the fuse-link volume is little.It can only provide the fuse quality state on that road fast, but can not point out the on off operating mode of circuit, and also has the limitation on some device technology, still is not easy to safeguard and maintenance.

The purpose of this utility model is to provide a kind of automobile weak point acoustic-optic alarm that opens circuit, and it can make clearly reflection to the on off operating mode of fuse-link, and you are come into plain view, and is convenient to change, and also can point out the on off operating mode of related circuit, is convenient to safeguard and maintenance.

The technical solution of the utility model is, it comprises fuse and power supply, its contribution to prior art is: it also comprises optical display unit, and sample circuit, phase inverter, isolator, bleeder circuit, the pulse power, the control power supply, gauge tap, buffer circuit, load, differentiate display circuit, pressure sampling circuit and sound alarm circuit, its electrical connection is, fuse links to each other with power supply, optical display unit is in parallel with fuse, sample circuit is to take out from above-mentioned two parallel circuit lower ends, connect with phase inverter, phase inverter is connected with isolator, connect with bleeder circuit at last, from the number of winning the confidence mutually of bleeder circuit center, in parallel with sound alarm circuit, promote sound horn; And be in series with fuse on the buffer circuit, under connect load, buffer circuit is in parallel with the gauge tap of control buffer circuit on off operating mode, differentiate that demonstration and the upper end of buffer circuit and the lower end of load are in parallel, pressure sampling circuit is in parallel with the discriminating display circuit, take out signal from dividing potential drop sampling central point, connect, at last signal is delivered to bleeder circuit and sound light alarming circuit with isolation capacitance.

The utility model has the advantages that it can make clearly reflection to the on off operating mode of fuse-link, be convenient to change, be convenient to safeguard and maintenance.This novel socket is no matter all can use with the fuse cutout of original safety plate or novel H9823965.2.

In design experiment, consider that also non-sometimes important fuse burns out, do not have for the moment spare unit then the music sound do not stop.Can be marked with a frame of broken lines on wiring diagram, switch can be used microswitch in the frame for this reason.Can disconnect in case of necessity, sound does not temporarily ring, and has treated to close behind the spare unit again.

Below in conjunction with accompanying drawing the utility model is made further detailed explanation:

Fig. 1 is an electric functional-block diagram of the present utility model,

Fig. 2 is an electrical connection graph of the present utility model.

The utility model comprises fuse and power supply, its contribution to prior art is: it also comprises optical display unit, and sample circuit, phase inverter, isolator, bleeder circuit, the pulse power, the control power supply, gauge tap, buffer circuit, load, differentiate display circuit, pressure sampling circuit and sound alarm circuit, its electrical connection is, fuse links to each other with power supply, optical display unit is in parallel with fuse, sample circuit is to take out from above-mentioned two parallel circuit lower ends, connect with phase inverter, phase inverter is connected with isolator, connects with bleeder circuit at last, from the number of winning the confidence mutually of bleeder circuit center, in parallel with sound alarm circuit, promote sound horn; And be in series with fuse on the buffer circuit, under connect load, buffer circuit is in parallel with the gauge tap of control buffer circuit on off operating mode, differentiate that demonstration and the upper end of buffer circuit and the lower end of load are in parallel, pressure sampling circuit is in parallel with the discriminating display circuit, take out signal from dividing potential drop sampling central point, connect, at last signal is delivered to bleeder circuit and sound light alarming circuit with isolation capacitance.

(see figure 2) in the utility model: use LED, diode DI and resistance R constitute optical display unit, constitute phase inverter with integrated component CD4049, send 3V and 0V signal by the bleeder circuit that resistance 6K, 2.2K constitute.Constitute sound alarm circuit with 3V music integrated circuit and Microspeaker; It also is made of the turn-on and turn-off of the control circuit control buffer circuit of buffer circuit 1.5V power supply and normally closed switch.Buffer circuit adopts withstand voltage high-power switchgear triode BO208, when it turn-offs, can stand the effect of pulse power peak value, and electric current is minimum, is in desirable the shutoff.Whether this line characteristics also is, utilizes the protective resistance of aeolight series connection with it to constitute the discriminating demonstration, open circuit or normally to differentiate with its parallel branch.Pressure sampling circuit is to be respectively the series connection of 33K, 39K resistance by two resistances to constitute.And from central point taking-up signal, isolate by the electric capacity that strict polar requirement is arranged, again signal is delivered to bleeder circuit and sound alarm circuit at last.

For realizing the T2-T4 triode installation in the electrical principle circuit diagram one, triode is equipped with heat radiator, but because bulb model difference varies in size, and intermediate pore size utilizes hole dimension that it is fixed on the lamp socket by specifically deciding, also is firmly convenient.

Arbitrary or some blows among fuse-link FU, and for load communicates, light emitting diode is triggered electric current, sends ruddiness by diode R1, LED 1 and resistance R 1, represents this fuse-link fusing; When fuse-link during in normal condition, be that noble potential is power source voltage in the lower end of resistance R 1～R12, it receives the input end of integrated circuit phase inverter CD4049IC1～IC12 respectively by lead-in wire.Noble potential becomes electronegative potential after phase inverter is anti-phase, arrive divider resistance R25, R26 through diode D13～D20 (using IN4148) again, after dividing potential drop, delivers to music integrated component 2C13, and voltage is very little, is not enough to promote, can not sounding.Power source voltage is luminous by diode D1 after fuse-link FU fusing, diode (LED) 1 and resistance R 1, because of the light emitting diode conducting luminous, through reducing to the input end that this signal of electronegative potential is delivered to IC1～IC12 after diode D1 and resistance R 1 pressure drop, after anti-phase, become noble potential, through behind D13～D20, after delivering to voltage divider R25, R22 dividing potential drop, still have the DC potential of 2.5V～3V to promote integrated music device and loudspeaker, send the musical sound of happy ear, sound and light alarm represents that fuse-link fuses.Diode D13～D20 isolates each output circuit, mutually sound equipment not.

This device circuit adopts a pulse signal power supply, and the peak value of pulse of generation is 64V, and under this pulse action, aeolight (claiming neon bulb again) is lighted and sent ruddiness.But, this bulb side parallel connection, when being less than or equal to the resistance of 1K Ω, then bulb extinguishes.If the connection resistance branch is thrown off again or parallel branch in the middle of have and open circuit, as point between L1, the L2 disconnection is arranged, neon bulb is shinny.The situation of two loads in parallel of the branch road that has in automobile circuit or two above loads (bulb) is many, have in addition simultaneously and connect 4 bulbs.Run into this situation, adopt this circuit then to realize easily, be not subjected to the influence of external interference again.

In the schematic diagram of Fig. 2, if bulb L1, L2 are parallel with bulb again, L1, L2 are not bad, and the L3 neon bulb does not work yet.Adopt high voltage bearing switching tube BU208A (BU208A, NPN, anti-1500v, 5a 12.5w) isolates, and when triode does not trigger in base stage, just can turn-off.

Press shown in Fig. 2, if do not press N1, N2 normally closed switch, neon bulb is bright, shows that then L1 and L2, L3 branch road all open circuit.Chopping signal is through R14 (33K), R15 (3.9K) play the part of press the back by electrochemical capacitor C2 be input to sound circuit and R25, the R26 bleeder circuit promotes loudspeaker and rings, sound is normal musical sound difference.If press N1 simultaneously, the N2 neon bulb is bright, unclamps any one N1 or N2 then, neon bulb goes out, and shows this branch road normally, does not open circuit, and power supply signal is most of by load, and on R14, R15 on the divider resistance very little voltage, can not promote sound horn.In like manner, when circuit moved normally at direct supply, it was also little to obtain signal on R14, R15 divider resistance, can not promote the loudspeaker sound.

Pulse signal source is the principle that adopts positive feedback, produce spike pulse, potentiometer W1 resistance 50-10K, it is to regulate output amplitude, the C1 electrochemical capacitor is a buffer action, and the electric current that neon bulb triggers is through different cultivars test several times, series connection K2 resistance maximum current is 1.6mA, generally 1.18,1.16,1.10,1.06mA is safety current.The direct supply that the pulse power is used is between 4.5v-6v.

This circuit pulse power is that direct current 12v power supply is added on the circuit simultaneously, and the pulse power is not worked, and this is caused through secondary wire by direct current.Thereby this circuit is reliable through various situation tests.

For realizing the T2-T4 triode installation in the electrical principle circuit diagram 2, heat radiator is housed on the triode, but because lamp is opened, sound does not ring temporarily, has treated to close behind the spare unit again.Bubble model difference varies in size, and intermediate pore size utilizes hole dimension that it is fixed on the lamp socket by specifically deciding, and also is firmly convenient.

For realizing circuit breaker, T2-T4 in the circuit theory diagrams (Fig. 2), BU208 (A) is adopted in test, can be according to the bulb different model, size of current is different to be selected in addition, but must go up similar to figure on the concrete structure, triode must have corresponding heat radiator, size is selected with automobile lamp holder size with being fixed on the automobile in the hole, and it is also convenient to be connected and fixed.

Universal circuit on the automobile, its pull-up resistor can be calculated from fuse, general provision automobile fusing current is 2 times of rated current, its rated current of fusing electricity is the automobile of 0.5a, 12v, 24v power supply, " up-to-date automobile uses the maintenance complete works " (Yu Fei chief editor, publishing house of University of Electronic Science and Technology 1994, the p90 page or leaf)

Automobile fuse specification: 15A 10A 7.5A 5A 3A 1A 0.5A

The load of 24v electric current: 3.2 Ω, 4.8 Ω, 8.4 Ω, 9.6 Ω, 16 Ω, 48 Ω, 64 Ω

The pull-up resistor of 12v power supply: 1.6 Ω, 2.4 Ω, 3.2 Ω, 4.8 Ω, 8 Ω, 24 Ω, 32 Ω

After load circuit opens circuit, utilize oscillator and aeolight to judge, little more than the volume with DC relay, convenient, price is also cheap, pilothouse vehicle head position limited space system, and the method when also requiring to check is simple, convenient.

Claims (1)

1, a kind of automobile weak point acoustic-optic alarm that opens circuit, it comprises fuse and power supply, it is characterized in that: it also comprises optical display unit, and sample circuit, phase inverter, isolator, bleeder circuit, the pulse power, the control power supply, gauge tap, buffer circuit, load, differentiate display circuit, pressure sampling circuit and sound alarm circuit, its electrical connection is, fuse links to each other with power supply, optical display unit is in parallel with fuse, sample circuit is to take out from above-mentioned two parallel circuit lower ends, connect with phase inverter, phase inverter is connected with isolator, connect with bleeder circuit at last, from the number of winning the confidence mutually of bleeder circuit center, in parallel with sound alarm circuit, promote sound horn; And be in series with fuse on the buffer circuit, under connect load, buffer circuit is in parallel with the gauge tap of control buffer circuit on off operating mode, differentiate that demonstration and the upper end of buffer circuit and the lower end of load are in parallel, pressure sampling circuit is in parallel with the discriminating display circuit, take out signal from dividing potential drop sampling central point, connect, at last signal is delivered to bleeder circuit and sound light alarming circuit with isolation capacitance.

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