CN103273871A - Method of using non-halogen lamp as automobile lamp, decoding circuit of using non-halogen lamp as automobile lamp and working method of decoding circuit - Google Patents
Method of using non-halogen lamp as automobile lamp, decoding circuit of using non-halogen lamp as automobile lamp and working method of decoding circuit Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 229910052736 halogen Inorganic materials 0.000 title abstract 14
- 150000002367 halogens Chemical class 0.000 title abstract 14
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 238000007600 charging Methods 0.000 claims abstract description 15
- 150000004820 halides Chemical class 0.000 claims description 79
- 238000004088 simulation Methods 0.000 claims description 27
- 238000001914 filtration Methods 0.000 claims description 25
- 239000003990 capacitor Substances 0.000 claims description 16
- 239000004065 semiconductor Substances 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000009977 dual effect Effects 0.000 claims description 2
- 229910052724 xenon Inorganic materials 0.000 description 5
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/357—Driver circuits specially adapted for retrofit LED light sources
- H05B45/3574—Emulating the electrical or functional characteristics of incandescent lamps
- H05B45/3575—Emulating the electrical or functional characteristics of incandescent lamps by means of dummy loads or bleeder circuits, e.g. for dimmers
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
- H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
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Abstract
The invention discloses a method of using a non-halogen lamp as an automobile lamp, a decoding circuit of using the non-halogen lamp as the automobile lamp and a working method of the decoding circuit and is applied to the field of automobile lamps. The method of using the non-halogen lamp as the automobile lamp solves the problem of detection misjudgment of an automobile system when the non-halogen lamp is used as the automobile lamp, so that the non-halogen lamp can be used for the field of the automobile lamps instead of a halogen lamp. The decoding circuit of using the non-halogen lamp as the automobile lamp is connected between a power source and the non-halogen lamp so that the non-halogen lamp can be lightened normally when the non-halogen lamp is used as the automobile lamp. The working method of the decoding circuit of using the non-halogen lamp as the automobile lamp enables the decoding circuit to be capable of well simulating load characteristics of the halogen lamp and prevent overlarge charging current, and can be used for different automobile models with different automobile system detection signals, so that the automobile system is judged to be in the normal state when in detection.
Description
Technical field
The present invention relates to the auto electronic technical field.
Background technology
Along with being showing improvement or progress day by day of science and technology, except halide torch, the light source lamp of other kind also can be applied on the automobile as vehicle light illumination, for example xenon lamp, LED lamp etc.But a lot of brand vehicles have only been considered to use halide torch as the situation of car light when the design vehicle system on the market.Situations such as non-halide torchs such as xenon lamp, LED lamp are applied to can not normally light in such automobile, and normal appearance can not be lighted, job insecurity even automobile circuit burn out.Through research, car light can not normally have been lighted following reason:
One, because the load characteristic of non-halide torch is different from halide torch, causes that automotive system detects erroneous judgement
Such automobile is when the opening automobile system power supply, and automotive system output pulse signal at short notice acts in each car light line loop as detection signal, and whether be used for detecting car light normal; Even the part automobile is arranged when the automotive system normal operation, whether also can send this detection signal detection car light normal; Halide torch is resistive load, when impulse singla acts on the halide torch with the pulse current of production counterpart impedance, automotive system detect whether have electric current to flow through halide torch or size of current whether detect car light normal; If normally then automotive system will carry out normal operation under lighting switch control, if mal then can send the fault alarm instruction;
This detect and the basis of control method on, if automotive lamp is that because the car light impedance changes, the detection of automotive system and control circuit will be judged the car light mal, send fault alarm and instruct when adopting non-halide torch; Non-like this halide torch can not normally be lighted, and influence car light and use.
Solution in the market has: at car light power supply port power resistor in parallel, resistance is equal to or less than halide torch, makes automotive system judge that car light is for normal; But power resistor is consumed power always, and the electric energy of consumption all is converted into heat energy, and temperature is very high, and power resistor is installed in the car abnormally dangerous;
Two, because pouring in down a chimney, electric current causes that automotive system detects erroneous judgement, or because of the error-polarity connection of power supply damage
Car light is generally direct current or pulse (PWM) DC supply, the power supply of halide torch input polarity does not require, but when being to use non-halide torch, the electronic circuit part is arranged between power supply and bulb, the positive and negative electrode of power supply needs correct the access, if the polarity of voltage input error will cause circuit to damage;
In addition, at present a lot of vehicles have halide torch modulating voltage (or the pulse power supply falling edge) measuring ability of turning off the light because the halide torch loop do not have can storage of electrical energy capacity cell, so whole halide torch current supply circuit is resistive; When being automotive system shutoff halide torch power supply, detect modulating voltage simultaneously, using under the halide torch situation, voltage of both ends of lamp drops to low level fast during the car light power cutoff;
And when the capacity cell of car light power supply loop existence energy storage of electrical energy (as the electric capacity in the products such as ballast with xenon lamp, LED power supply, halide torch Light enhancer, battery etc.), when turn-offing the lamp power supply, voltage/current on electric energy-storage travelling wave tube/circuit such as electric capacity will pour in down a chimney to automotive system, at this moment automotive system will detect voltage/current, send fault alarm instruction (as turn-offing vehicle light power supply), influence the automobile operation and use;
Prior art adopts the solution as Fig. 1 or Fig. 2, but under big current conditions, the loss on the diode is very big, increases the power consumption of entire circuit, and power consumption transforms circuit reliability decline with form of heat; The scheme that also has another kind of scheme solution error-polarity connection of power supply, as shown in Figure 3; But when the input error-polarity connection of power supply, because the grid of metal-oxide-semiconductor is not isolated, under high reverse bias voltage, may damage metal-oxide-semiconductor;
Three, capacitive element produces very big pulse current and makes automotive system detection erroneous judgement when connecting power supply
When using non-halide torch, the electronic circuit part is arranged between power supply and light source, there are capacitive elements such as filter capacitor in the circuit, so capacitive element can produce very big pulse current owing to extremely low impedance when connecting power supply, may cause automotive system to detect mistake and be judged as fault or damage; Therefore, as car light, there are not capacitive element circuit such as energy storage filter capacitor with cisco unity malfunction with non-halide torch; May be because the capacitive characteristic cause big pulse current after adding capacitive element, how suppressing big pulse current has become a gordian technique.
Therefore, need address the above problem, make as non-halide torchs such as xenon lamp, LED lamps and can be used as the car light use.
Summary of the invention
For overcoming the deficiencies in the prior art, one of them purpose of the present invention is to provide the method for a kind of non-halide torch as car light, automotive system detects the problem of erroneous judgement when having solved non-halide torch as car light, makes non-halide torch can replace halide torch and is used for the car light field.Second purpose of the present invention is to provide the decoding circuit of a kind of non-halide torch as car light, is connected between power supply and the non-halide torch, can normally light when making non-halide torch as car light.A further object of the invention is to provide the method for work of a kind of non-halide torch as the decoding circuit of car light, make decoding circuit can simulate well halide torch load characteristic and prevent that charging current is excessive, can be used for having the different automobile types of different automotive system detection signals, be judged as normal condition when automotive system is detected.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of non-halide torch is as the method for car light, it is characterized in that, setting prevents the back flow circuit that prevents that circuital current pours in down a chimney between power supply input and follow-up electronic circuit, the ohmic load circuit of controlled simulation halide torch is set after preventing back flow circuit simultaneously, it is normal condition that this ohmic load circuit is used for serving as the halide torch load and making testing result when automotive system detects, simultaneously also before power supply output setting prevent that charging current is excessive and play the filter circuit of filter action.Automotive system detected the problem of erroneous judgement when the inventive method had solved non-halide torch as car light, made non-halide torch can replace halide torch and was used for the car light field.
According to the method for above-mentioned non-halide torch as car light, the present invention adopts following technical scheme: a kind of non-halide torch comprises the decoding circuit control system as the decoding circuit of car light, it is characterized in that, also comprises:
Be used for preventing that circuital current from pouring in down a chimney prevents from pouring in down a chimney module;
The load simulation module that is used for simulation halide torch ohmic load;
And prevent that charging current is excessive and play the filtration module of filter action;
Describedly prevent from pouring in down a chimney module, load simulation module and filtration module and be electrically connected successively; Power supply input anode and power supply input negative terminal are electrically connected and prevent from pouring in down a chimney module, and described filtration module connects power supply output plus terminal and power supply output negative terminal; The output control one of described decoding circuit control system connects the load simulation module, and the output control two of decoding circuit control system connects filtration module.But the technical matters that this decoding circuit solution must not the bright non-halide torch of normal point.
Further scheme is: described load simulation module comprises resistance R 6 and on-off element Q2; Conductive channel end and R6 the be connected in series formation load circuit of Q2 by Q2; The control end of Q2 is connected with the output control one of decoding circuit control system; Described load circuit is parallel to both ends of power.
Describedly prevent from pouring in down a chimney module and comprise on-off element Q1 and voltage comparator exclusive disjunction amplifier U1; The positive source of U1 is connected with the power supply output plus terminal; The power cathode of U1 is connected with power supply output negative terminal, and is connected with ground; The mouth of U1 connects the control end of Q1; The reverse input end of U1 is connected with two conductive channel ends of Q1 respectively with positive input; Q1 adopts dual mode to connect: (one) Q1 is connected between power supply input negative terminal and the power supply output negative terminal by the conductive channel end of Q1, and power supply input anode directly is connected with the power supply output plus terminal; (2) also comprise diode D2, Q1 is connected between power supply input anode and the power supply output plus terminal by the conductive channel end of Q1, the control end of Q1 also is connected with power supply output negative terminal with power supply input negative terminal by D2, the negative electrode of D2 is connected with the control end of Q1, and the anode of D2 is connected with power supply output negative terminal with power supply input negative terminal.After employing prevents from pouring in down a chimney module, can avoid causing that because electric current pours in down a chimney automotive system detects erroneous judgement and is fault; Simultaneously can prevent from causing damage because of error-polarity connection of power supply.
For preventing from pouring in down a chimney module, further scheme is: describedly prevent from pouring in down a chimney module and also comprise diode D1 and capacitor C 1; Add diode D1 between the positive source of described power supply output plus terminal and U1, the anode of D1 is connected with the power supply output plus terminal, and the negative electrode of D1 is connected with ground by capacitor C 1, and the negative electrode of D1 is connected with the positive source of U1 simultaneously.
Describedly prevent from pouring in down a chimney module and also comprise resistance R 1, R2, R3, R4, R5; R1 is connected between power supply input anode and the power supply input negative terminal; R2 is connected between the positive source of the mouth of U1 and U1; Between the control end of the mouth of U1 and Q1, add R3; Between the conductive channel end of the reverse input end of U1 and Q1, add R4; Between another conductive channel end of the positive input of U1 and Q1, add R5.
Described filtration module comprises on-off element Q3, capacitor C 2 and resistance R 7; Q3 is connected in parallel by conductive channel end and the R7 of Q3, afterwards with the C2 formation filter circuit that is connected in series; The control end of Q3 is connected with the output control two of decoding circuit control system; Described filter circuit is parallel to both ends of power.The excessive problem of charging current that the set-up mode of filtration module can well avoid the direct ground connection of C2 negative pole to cause keeps good filter action simultaneously.
Preferred scheme is: described on-off element Q1, Q2, Q3 adopt metal-oxide-semiconductor or IGBT pipe or relay; The span of described resistance R 1, R6 and R7 is: R1≤200 Ω, R6≤10 Ω, R7＞0.1 Ω.
Above-mentioned non-halide torch is characterized in that as the method for work of the decoding circuit of car light, comprises the steps:
The first step, the decoding circuit control system receives the detection signal of automotive system;
In second step, the decoding circuit control system is judged detection signal: if testing result is high level, then control the conductive channel end of two output signal cut-off switch element Q3, control the conductive channel end of an output signal turn-on switch component Q2 afterwards; If testing result is not high level, then control the conductive channel end of an output signal cut-off switch element Q2, control the conductive channel end of two output signal turn-on switch component Q3 afterwards.During the conductive channel end conducting of Q2 and R6 form resistive load simulation halide torch, characteristic is very near halide torch, and the time of conducting is controlled by the high level time of automotive system detection signal, therefore decoding circuit can be simulated the current signal of halide torch well, and car light can normal operation when being applied to different automobile types difference detection signal.The conductive channel end of Q2 does not turn-off when having the automotive system detection signal simultaneously, avoids the R6 long-term work and power consumption and heating.
Further scheme is: the conductive channel end of control one output signal turn-on switch component Q2 in described second step, single ON time≤20ms of on-off element Q2.
The present invention possesses following outstanding advantage and effect with respect to prior art:
Automotive system detected the problem of erroneous judgement when 1, the non-halide torch of the present invention had solved non-halide torch as car light as the method for car light, made non-halide torch can replace halide torch and was used for the car light field;
2, the non-halide torch of the present invention is connected between power supply and the non-halide torch as the decoding circuit of car light, can normally light when making non-halide torchs such as xenon lamp, LED lamp as car light;
3, the load simulation module of decoding circuit of the present invention can not disconnect when having the automotive system detection signal, reduces power consumption, does not have the problem of switching on always and causing decoding circuit to generate heat owing to power resistor simultaneously;
4, decoding circuit of the present invention can prevent from causing that because electric current pours in down a chimney automotive system detects erroneous judgement, can avoid causing damage because of error-polarity connection of power supply simultaneously;
5, the filtration module of decoding circuit of the present invention can well be avoided the excessive problem of charging current that the direct ground connection of electric capacity negative pole is caused, and keeps good filter action simultaneously;
6, the non-halide torch of the present invention is as the method for work of the decoding circuit of car light, make decoding circuit can simulate well halide torch load characteristic and prevent that charging current is excessive, can be used for having the different automobile types of different automotive system detection signals, be judged as normal condition when automotive system is detected.
Description of drawings
Fig. 1 is the solution that anti-electric current pours in down a chimney in the prior art;
Fig. 2 is another solution that anti-electric current pours in down a chimney in the prior art;
Fig. 3 is a solution of anti-error-polarity connection of power supply in the prior art;
Fig. 4 is the structural representation of decoding circuit of the present invention;
Fig. 5 is a kind of scheme of decoding circuit of the present invention;
Fig. 6 is the another kind of scheme that prevents from pouring in down a chimney module of decoding circuit of the present invention.
The specific embodiment
The present invention is described in further detail below in conjunction with embodiment, but embodiments of the present invention are not limited thereto.
Embodiment one
The non-halide torch of present embodiment is as the method for car light, setting prevents the back flow circuit that prevents that circuital current pours in down a chimney between power supply input and follow-up electronic circuit, the ohmic load circuit of controlled simulation halide torch is set after preventing back flow circuit simultaneously, it is normal condition that this ohmic load circuit is used for serving as the halide torch load and making testing result when automotive system detects, simultaneously also before power supply output setting prevent that charging current is excessive and play the filter circuit of filter action.Automotive system detected the problem of erroneous judgement when the present embodiment method had solved non-halide torch as car light, made non-halide torch can replace halide torch and was used for the car light field.
Embodiment two
The present embodiment decoding circuit uses when non-halide torch is used as car light.Decoding circuit is connected between power supply and the non-halide torch, the constructional drawing of decoding circuit as shown in Figure 4, decoding circuit comprises the decoding circuit control system, be used for preventing that circuital current from pouring in down a chimney prevents pouring in down a chimney module, be used for the load simulation module of simulation halide torch ohmic load and prevent that charging current is excessive and play the filtration module of filter action.Preventing from pouring in down a chimney module, load simulation module and filtration module is electrically connected successively; Power supply input anode and power supply input negative terminal are electrically connected and prevent from pouring in down a chimney module, and filtration module connects power supply output plus terminal and power supply output negative terminal; The control system that the decoding circuit control system can adopt microprocessor control system or analogous circuit to form, the output control one of decoding circuit control system connects the load simulation module, and the output control two of decoding circuit control system connects filtration module.
As shown in Figure 5, prevent from pouring in down a chimney module and comprise on-off element Q1, voltage comparator exclusive disjunction amplifier U1, diode D1, capacitor C 1 and resistance R 1, R2, R3, R4, R5; On-off element Q1 adopts the N-type metal-oxide-semiconductor.Power supply input anode directly is connected with the power supply output plus terminal; The positive source of U1 is connected with the power supply output plus terminal by D1, and the anode of D1 is connected with the power supply output plus terminal, and the negative electrode of D1 is connected with the positive source of U1; Simultaneously, the negative electrode of D1 is connected with ground by capacitor C 1, and the negative electrode of D1 is connected with the mouth of U1 by R2.The mouth of U1 connects the control end of Q1 simultaneously by R3, the control end of Q1 is the G utmost point of Q1; The power cathode of U1 is connected with power supply output negative terminal, and is connected with ground; The reverse input end of U1 is connected with two conductive channel ends of Q1 with R5 by R4 respectively with positive input, and two conductive channel ends of Q1 refer to the D utmost point and the S utmost point of Q1, and the D utmost point of Q1 is connected with the end of R4, and the S utmost point of Q1 is connected with the end of R5; Q1 is connected between power supply input negative terminal and the power supply output negative terminal by the conductive channel end of Q1, and namely the D utmost point of Q1 is connected with power supply input negative terminal, and the S utmost point of Q1 is connected with power supply output negative terminal.Resistance R 1 is connected between power supply input anode and the power supply input negative terminal, the resistance of R1≤200 Ω, and R1 can.
When U1 adopted no high level output type (collector/open circuit) voltage comparator exclusive disjunction amplifier, R2 formed U1 output pull-up circuit; When U1 uses other voltage comparator exclusive disjunction amplifier, R2 can, directly open circuit.When the power supply of decoding circuit was input as quick connection and turn-offs, D1, C1 formed the filter circuit of U1, for U1 provides power supply and prevents that power supply from disturbing; When power supply is input as continued power D1 can, direct short-circuit, C1 can.In addition, R3, R4, R5 can, direct short-circuit.
Prevent from pouring in down a chimney module and can prevent that electric current from pouring in down a chimney, also can be when error-polarity connection of power supply protective circuit, its principle is: situation one, when power supply input error-polarity connection, because having normal working voltage, U1 do not work, the U1 mouth is low level, and the conductive channel end of Q1 is disconnected, and guarantees that electric current can not flow to the S utmost point by the D utmost point of Q1, protection back circuit safety plays the effect of input supply voltage protection to error-polarity connection; Situation two, when correct and power input voltage is higher than electric power output voltage when power supply input polarity, U1 export high level, the conductive channel end conducting of Q1 forms a low-impedance current path, assurance circuit normal operation; Situation three, when pwm pulse power supply falling edge (when turn-offing vehicle light power supply corresponding to automotive system or) was because there is resistive impedance in power input when correct and power input voltage was lower than electric power output voltage when electric power polarity, voltage in the external circuit of the internal circuit of decoding circuit and mouth on the electric capacity will oppositely pour in down a chimney and flow to power input, counter-current is at the D of Q1, S extremely goes up and produces loss in voltage, loss in voltage polarity be D very just, S is very negative, the U1 output low level, the conductive channel end of Q1 disconnects, avoid the voltage/current of power output end to pour in down a chimney to power input, can avoid causing that because electric current pours in down a chimney automotive system detects erroneous judgement.
The load simulation module comprises on-off element Q2 and resistance R 6, and on-off element Q2 adopts the N-type metal-oxide-semiconductor.Conductive channel end and R6 the be connected in series formation load circuit of Q2 by Q2; The control end of Q2 is connected with the output control one of decoding circuit control system; Load circuit is parallel to both ends of power.The conductive channel end of Q2 refers to the D utmost point and the S utmost point of Q2, and the control end of Q2 refers to the G utmost point of Q2; In Fig. 5, the power supply output plus terminal is connected with the D utmost point of Q2 by R6, and the S utmost point of Q2 is connected with power supply output negative terminal.In actual applications, the position of R6 and Q2 is interchangeable, and namely the power supply output plus terminal is connected with the D utmost point of Q2, and the S utmost point of Q2 is connected with power supply output negative terminal by R6.
By decoding circuit control system output control one, export high/low level signal with the break-make control of the conductive channel end of realization Q2, when if the decoding circuit control system detects the automotive system detection signal and is high level, the output high level makes the conductive channel end conducting of Q2, and the detection electric current of automotive system flows through R6; If it is low level or when normally lighting a lamp, output low level is turn-offed the conductive channel end of Q2 that the decoding circuit control system detects the automotive system detection signal, the R6 no current flows through.The resistance of R6≤10 Ω.The advantage of load simulation module is, during the conductive channel end conducting of Q2 and R6 form resistive load simulation halide torch, load characteristic is very near halide torch, and the time of conducting is controlled by the high level time of automotive system detection signal, like this can normal operation when being applied to different automobile types difference detection signal.The ON time of Q2 single is generally less than 20ms.
Filtration module comprises on-off element Q3, capacitor C 2 and resistance R 7; On-off element Q3 adopts the N-type metal-oxide-semiconductor.Q3 is connected in parallel by conductive channel end and the R7 of Q3, afterwards with the C2 formation filter circuit that is connected in series; The control end of Q3 is connected with the output control two of decoding circuit control system; Filter circuit is parallel to both ends of power.The conductive channel end of Q3 refers to the D utmost point and the S utmost point of Q3, and the control end of Q3 refers to the G utmost point of Q3; In Fig. 5, the power supply output plus terminal is connected with the positive pole of C2, and the D utmost point of Q3 is connected with the negative pole of C2, and the S utmost point of Q3 is connected with power supply output negative terminal, and R7 is connected in parallel between the D utmost point and the S utmost point of Q3.In actual applications, the Q3 that is connected in parallel and R7 can with the C2 transposition, namely the power supply output plus terminal is connected with the D utmost point of Q3, the S utmost point of Q3 is connected with the positive pole of C2, the negative pole of C2 and power supply output negative terminal is connected, R7 is connected in parallel between the D utmost point and the S utmost point of Q3.
When power supply is connected in the power supply input, cause big pulse current for fear of the C2 charging, the conductive channel end of being controlled Q3 by the control two of decoding circuit control circuit disconnects, capacitor C 2 is charged by resistance R 7, R7 has limited the charging current of C2, after capacitor C 2 chargings are finished, the conductive channel end conducting of control Q3, because Q3 is low on-resistance type MOSFET, so the electric current major part of capacitor C 2 will be by Q3 to the power supply output negative pole after the conductive channel end conducting of Q3, C2 can carry out filtering to electric power output voltage, if the excessive problem of charging current that can well avoid negative pole direct ground connection in C2 lower end to cause, the effect of filtering is carried out in the output to power supply that keeps good simultaneously.Resistance R 7 resistances＞0.1 Ω.
Embodiment three
The present embodiment decoding circuit comprises the decoding circuit control system, prevents from pouring in down a chimney module, load simulation module and filtration module.Preventing from pouring in down a chimney module, load simulation module and filtration module is electrically connected successively; Power supply input anode and power supply input negative terminal are electrically connected and prevent from pouring in down a chimney module, and filtration module connects power supply output plus terminal and power supply output negative terminal; The control system that the decoding circuit control system can adopt microprocessor control system or be made up of analogous circuit, the output control one of decoding circuit control system connects the load simulation module, and the output control two of decoding circuit control system connects filtration module.
Wherein, load simulation module and filtration module adopt the structure of embodiment two.Prevent from pouring in down a chimney the structure of module as shown in Figure 6.Prevent from pouring in down a chimney module and comprise on-off element Q1, voltage comparator exclusive disjunction amplifier U1, diode D1, capacitor C 1 and resistance R 1, R2, R3, R4, R5; Also comprise diode D2; On-off element Q1 adopts the N-type metal-oxide-semiconductor.Power supply input negative terminal directly is connected with power supply output negative terminal, and is connected with ground; The positive source of U1 is connected with the power supply output plus terminal by D1, and the anode of D1 is connected with the power supply output plus terminal, and the negative electrode of D1 is connected with the positive source of U1; Simultaneously, the negative electrode of D1 is connected with ground by capacitor C 1, and the negative electrode of D1 is connected with the mouth of U1 by R2.Simultaneously, the mouth of U1 is by the control end of R3 connection Q1, and the control end of Q1 is the G utmost point of Q1; In addition, the mouth of U1 is connected with power supply output negative terminal by D2, and the anode of D2 is connected with power supply output negative terminal, and the negative electrode of D2 is connected with the mouth of U1.The power cathode of U1 is connected with power supply output negative terminal; The reverse input end of U1 is connected with two conductive channel ends of Q1 with R5 by R4 respectively with positive input, and two conductive channel ends of Q1 refer to the D utmost point and the S utmost point of Q1, and the D utmost point of Q1 is connected with the end of R4, and the S utmost point of Q1 is connected with the end of R5; Q1 is connected between power supply input anode and the power supply output plus terminal by the conductive channel end of Q1, and namely the D utmost point of Q1 is connected with power supply input anode, and the S utmost point of Q1 is connected with the power supply output plus terminal.Resistance R 1 is connected between power supply input anode and the power supply input negative terminal, and R1 can.When power supply is input as continued power D1 can, direct short-circuit, C1 can.In addition, R3, R4, R5 can, direct short-circuit.
Embodiment four
In embodiment two and embodiment three, on-off element Q1, Q2, Q3 can change by the high-low level of control end to realize that the on-off element of controlling on off mode between the conductive channel end gets final product.On-off element Q1, Q2, the N-type metal-oxide-semiconductor of Q3 in can adopting embodiment two and embodiment three, also can adopt other on-off element.On-off element Q1, Q2, Q3 preferably adopt metal-oxide-semiconductor or IGBT pipe or relay.If adopt the IGBT pipe, the control end of on-off element Q1, Q2, Q3 refers to the G utmost point (gate pole) of IGBT pipe, and the conductive channel end of on-off element Q1, Q2, Q3 refers to the C utmost point (collecting electrode) and the E utmost point (emitter) of IGBT pipe; If adopt relay, the control end of on-off element Q1, Q2, Q3 refers to the input end of relay, and the conductive channel end of on-off element Q1, Q2, Q3 refers to the mouth of relay.
Embodiment five
What present embodiment was told about is that non-halide torch is as the method for work of the decoding circuit of car light.The decoding circuit control system of decoding circuit can adopt existing control system, and for example existing microprocessor control system adopts chip 8051 as process chip; One of them I/O mouth of microprocessor control system receives the detection signal of automobile detection system; Two other I/O mouth output control one and control two are connected with filtration module with the load simulation module respectively.The control system that the decoding circuit control system can also adopt analogous circuit to form.
The method of work of decoding circuit comprises the steps:
The first step, the decoding circuit control system receives the detection signal of automotive system; The detection signal of automotive system refers to that a lot of vehicles are when the automotive system power-on or in the automotive system normal operation, and the impulse singla that automotive system is exported at short notice, impulse singla act in each car light line loop, and whether be used for detecting car light normal;
In second step, the decoding circuit control system is judged detection signal: if testing result is high level, then control the conductive channel end of two output signal cut-off switch element Q3, control the conductive channel end of an output signal turn-on switch component Q2 afterwards; If testing result is not high level, then control the conductive channel end of an output signal cut-off switch element Q2, control the conductive channel end of two output signal turn-on switch component Q3 afterwards.
Wherein, the conductive channel end of control one output signal turn-on switch component Q2 in second step, single ON time≤20ms of on-off element Q2.
Above-described embodiment is preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. a non-halide torch is as the method for car light, it is characterized in that, setting prevents the back flow circuit that prevents that circuital current pours in down a chimney between power supply input and follow-up electronic circuit, the ohmic load circuit of controlled simulation halide torch is set after preventing back flow circuit simultaneously, it is normal condition that this ohmic load circuit is used for serving as the halide torch load and making testing result when automotive system detects, simultaneously also before power supply output setting prevent that charging current is excessive and play the filter circuit of filter action.
2. a non-halide torch comprises the decoding circuit control system as the decoding circuit of car light, it is characterized in that, also comprises:
Be used for preventing that circuital current from pouring in down a chimney prevents from pouring in down a chimney module;
The load simulation module that is used for simulation halide torch ohmic load;
And prevent that charging current is excessive and play the filtration module of filter action;
Describedly prevent from pouring in down a chimney module, load simulation module and filtration module and be electrically connected successively; Power supply input anode and power supply input negative terminal are electrically connected and prevent from pouring in down a chimney module, and described filtration module connects power supply output plus terminal and power supply output negative terminal; The output control one of described decoding circuit control system connects the load simulation module, and the output control two of decoding circuit control system connects filtration module.
3. non-halide torch according to claim 2 is characterized in that as the decoding circuit of car light described load simulation module comprises resistance R 6 and on-off element Q2; Conductive channel end and R6 the be connected in series formation load circuit of Q2 by Q2; The control end of Q2 is connected with the output control one of decoding circuit control system; Described load circuit is parallel to both ends of power.
4. non-halide torch according to claim 3 is characterized in that as the decoding circuit of car light, describedly prevents from pouring in down a chimney module and comprises on-off element Q1 and voltage comparator exclusive disjunction amplifier U1; The positive source of U1 is connected with the power supply output plus terminal; The power cathode of U1 is connected and ground connection with power supply output negative terminal; The mouth of U1 connects the control end of Q1; The reverse input end of U1 is connected with two conductive channel ends of Q1 respectively with positive input; Q1 adopts dual mode to connect: (one) Q1 is connected between power supply input negative terminal and the power supply output negative terminal by the conductive channel end of Q1, and power supply input anode directly is connected with the power supply output plus terminal; (2) also comprise diode D2, Q1 is connected between power supply input anode and the power supply output plus terminal by the conductive channel end of Q1, the control end of Q1 also is connected with power supply output negative terminal with power supply input negative terminal by D2, the negative electrode of D2 is connected with the control end of Q1, and the anode of D2 is connected with power supply output negative terminal with power supply input negative terminal.
5. non-halide torch according to claim 4 is characterized in that as the decoding circuit of car light, describedly prevents from pouring in down a chimney module and also comprises diode D1 and capacitor C 1; Add diode D1 between the positive source of described power supply output plus terminal and U1, the anode of D1 is connected with the power supply output plus terminal, and the negative electrode of D1 is connected with ground by capacitor C 1, and the negative electrode of D1 is connected with the positive source of U1 simultaneously.
6. non-halide torch according to claim 5 is characterized in that as the decoding circuit of car light, describedly prevents from pouring in down a chimney module and also comprises resistance R 1, R2, R3, R4, R5; R1 is connected between power supply input anode and the power supply input negative terminal; R2 is connected between the positive source of the mouth of U1 and U1; Between the control end of the mouth of U1 and Q1, add R3; Between the conductive channel end of the reverse input end of U1 and Q1, add R4; Between another conductive channel end of the positive input of U1 and Q1, add R5.
7. non-halide torch according to claim 6 is characterized in that as the decoding circuit of car light described filtration module comprises on-off element Q3, capacitor C 2 and resistance R 7; Q3 is connected in parallel by conductive channel end and the R7 of Q3, afterwards with the C2 formation filter circuit that is connected in series; The control end of Q3 is connected with the output control two of decoding circuit control system; Described filter circuit is parallel to both ends of power.
8. non-halide torch according to claim 7 is characterized in that as the decoding circuit of car light, and described on-off element Q1, Q2, Q3 adopt metal-oxide-semiconductor or IGBT pipe or relay; The span of described resistance R 1, R6 and R7 is: R1≤200 Ω, R6≤10 Ω, R7＞0.1 Ω.
9. non-halide torch according to claim 8 is characterized in that as the method for work of the decoding circuit of car light, comprises the steps:
The first step, the decoding circuit control system receives the detection signal of automotive system;
In second step, the decoding circuit control system is judged detection signal: if testing result is high level, then control the conductive channel end of two output signal cut-off switch element Q3, control the conductive channel end of an output signal turn-on switch component Q2 afterwards; If testing result is not high level, then control the conductive channel end of an output signal cut-off switch element Q2, control the conductive channel end of two output signal turn-on switch component Q3 afterwards.
10. non-halide torch according to claim 9 is characterized in that as the method for work of the decoding circuit of car light, the conductive channel end of control one output signal turn-on switch component Q2 in described second step, single ON time≤20ms of on-off element Q2.
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