CN110065430B - Automobile headlamp system with state feedback and state monitoring method thereof - Google Patents
Automobile headlamp system with state feedback and state monitoring method thereof Download PDFInfo
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- CN110065430B CN110065430B CN201910393344.6A CN201910393344A CN110065430B CN 110065430 B CN110065430 B CN 110065430B CN 201910393344 A CN201910393344 A CN 201910393344A CN 110065430 B CN110065430 B CN 110065430B
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- headlamp
- feedback signal
- nmos transistor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
- B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
Abstract
The invention discloses an automobile headlamp system with state feedback, a state monitoring method thereof and an automobile headlamp state indicating method. The invention adds a state feedback function on the basis of the existing automobile headlamp system, monitors the state of each module in the automobile headlamp system through a control circuit, combines the state monitoring of a headlamp starting circuit and the state monitoring of a power factor correction circuit, a direct current conversion circuit and a low-frequency inverter circuit to judge whether the working state of the automobile headlamp system is normal or not, and if the working state of the automobile headlamp system is abnormal, the automobile headlamp is damaged or the automobile headlamp system is in failure, and feeds back the judgment result to an automobile instrument panel or a vehicle-mounted sound box. The automobile instrument panel or the vehicle-mounted sound box can send out corresponding indication signals according to the received information so as to remind a driver of the current states of the automobile headlamp system and the automobile headlamp and ensure the driving safety at night.
Description
Technical Field
The invention relates to an automobile electronic technology, in particular to an automobile headlamp system with state feedback, a state monitoring method thereof and an automobile headlamp state indicating method.
Background
It is known that the correct use of vehicle headlights is of great importance for the safety of the vehicle in operation. Currently, indication information on headlights of a vehicle on an instrument panel of a driver's cabin reflects the operation state of the headlights by the driver. The traditional headlamp system consists of a battery pack, a power factor correction circuit, a direct current conversion circuit, a low-frequency inverter circuit, a headlamp starting circuit, a control circuit and a headlamp. The core devices of the power factor correction circuit, the direct current conversion circuit, the low-frequency inverter circuit and the headlamp starting circuit are all full-control power electronic devices, and can be turned on and turned off through driving signals sent by the control circuit. The control circuit in the system is responsible for ensuring the normal and stable operation of the whole system, the monitoring of the system state is not realized, the monitoring state is not fed back to an instrument panel headlamp indicating system, and the actual working state of the automobile headlamp cannot be reflected. Some automobiles have an indicator light on the dashboard of the cab for indicating whether the automobile light is damaged, but the indicator light cannot accurately reflect which type of automobile light is damaged.
In summary, according to the prior art, a driver cannot judge whether an operation command for the headlamp is correctly executed, and cannot judge the actual operating state of the automotive headlamp. This poses a serious safety hazard to the running automobile.
Disclosure of Invention
The invention mainly aims to provide an automobile headlamp system with state feedback, a state monitoring method thereof and an automobile headlamp state indicating method, so as to solve the problem that in the prior art, a driver cannot judge whether an operation instruction for a headlamp is correctly executed or not and cannot judge the actual working state of the automobile headlamp.
The invention is realized by the following technical scheme:
an automobile headlamp system with state feedback comprises a power factor correction circuit, a direct current conversion circuit, a low-frequency inverter circuit and a headlamp starting circuit which are connected in sequence;
the direct current conversion circuit is used for boosting the voltage output by the automobile battery pack to a set value and then outputting the voltage to the low-frequency inverter circuit;
the low-frequency inverter circuit is used for inverting the voltage boosted by the direct-current conversion circuit into alternating current and outputting the alternating current to the headlamp starting circuit;
the headlamp starting circuit is used for boosting the alternating current and then outputting the boosted alternating current to an automobile headlamp so as to drive the headlamp;
the power factor correction circuit is used for improving the power factor of a system and controlling the connection between the battery pack and the direct current conversion circuit to be switched on and off;
the system also comprises a control circuit which is connected with the power factor correction circuit, the direct current conversion circuit, the low-frequency inverter circuit and the headlamp starting circuit and is connected to an automobile instrument panel or a vehicle-mounted sound box and is used for monitoring and controlling the working states of the power factor correction circuit, the direct current conversion circuit, the low-frequency inverter circuit and the headlamp starting circuit, sending a first feedback signal indicating that the working state of the automobile headlamp system is normal to the instrument panel or the vehicle-mounted sound box when the working state of the headlamp starting circuit is monitored to be normal, and sending a second feedback signal indicating that the headlamp is damaged to the instrument panel or the vehicle-mounted sound box when the working state of the headlamp starting circuit is abnormal but the working states of the power factor correction circuit, the direct current conversion circuit and the low-frequency inverter circuit are all normal, and when the working state of the headlamp starting circuit is abnormal and at least one of the power factor correction circuit, the direct current conversion circuit and the low-frequency inverter circuit is abnormal, sending a third feedback signal representing the fault of the automobile headlamp system to an instrument panel or a vehicle-mounted sound.
Furthermore, the power factor correction circuit, the direct current conversion circuit, the low-frequency inverter circuit and the headlamp starting circuit are all fully-controlled power electronic devices.
Further, the power factor correction circuit comprises an inductor L1, an NMOS transistor S0 and an NMOS transistor S1, one end of the inductor L1 is connected to the positive electrode of the battery pack, the other end of the inductor L1 is connected to the drain of the NMOS transistor S0 and the drain of the NMOS transistor S1, the source of the NMOS transistor S1 is connected to the negative electrode of the battery pack, and the source of the NMOS transistor S0 is connected to the input terminal of the dc conversion circuit.
Further, the dc conversion circuit includes an NMOS transistor S2, a diode D, and an inductor L2, a drain of the NMOS transistor S2 is connected to the power factor correction circuit as an input terminal of the dc conversion circuit, a source of the NMOS transistor S2 is connected to a negative terminal of the diode D and one end of the inductor L2, another end of the inductor L2 is connected to an input terminal of the low frequency inverter circuit as an output terminal of the dc conversion circuit, and an anode of the diode D is connected to a negative terminal of the battery pack.
Further, the low-frequency inverter circuit comprises an NMOS tube S3, an NMOS tube S4, an NMOS tube S5 and an NMOS tube S6, the NMOS tube S3, an NMOS tube S4, an NMOS tube S5 and an NMOS tube S6 form a unidirectional full-bridge inverter circuit, the input end of the unidirectional full-bridge inverter circuit serves as the input end of the low-frequency inverter circuit and the output end of the direct-current conversion circuit are connected, and the output end of the unidirectional full-bridge inverter circuit serves as the output end of the low-frequency inverter circuit and the input end of the headlamp starting circuit are connected.
Further, the headlamp starting circuit comprises a bidirectional diode D2, a capacitor C3 and a transformer T1, one end of the bidirectional diode D2 is used as an input end of the headlamp starting circuit and is connected with an output end of the low-frequency inverter circuit, the bidirectional diode D2 is connected with one end of the capacitor C3, the other end of the capacitor C3 is connected with a primary side of the transformer T1, a secondary side of the transformer T1 is connected with the headlamp, the alternating current is sequentially input to the primary side of the transformer T1 through the bidirectional diode D2 and the capacitor C3, and the transformer T1 boosts the alternating current and outputs the boosted alternating current to the headlamp through the secondary side of the transformer T1 to drive the headlamp.
A method of monitoring the state of a vehicle headlamp system with state feedback as described above, comprising the steps of:
the control circuit monitors the headlamp starting circuit to detect whether the working state of the headlamp starting circuit is normal or not;
when the working state of the headlamp starting circuit is normal, the control circuit sends a first feedback signal indicating that the working state of the automobile headlamp system is normal to the instrument panel or the vehicle-mounted sound;
when the working state of the headlamp starting circuit is abnormal, the control circuit detects the working states of the power factor correction circuit, the direct current conversion circuit and the low-frequency inverter circuit, and sends a second feedback signal indicating the damage of the headlamp to the instrument panel or the vehicle-mounted sound equipment when the working states of the power factor correction circuit, the direct current conversion circuit and the low-frequency inverter circuit are all normal, and sends a third feedback signal indicating the fault of the automobile headlamp system to the instrument panel or the vehicle-mounted sound equipment when the working state of any one of the power factor correction circuit, the direct current conversion circuit and the low-frequency inverter circuit is abnormal;
and when the instrument panel or the vehicle-mounted sound receives the first feedback signal, the second feedback signal or the third feedback signal, sending out a corresponding indication signal.
Further, after the control circuit sends the second feedback signal, the control circuit controls the power factor correction circuit to disconnect the connection between the battery pack and the dc conversion circuit, and after the control circuit sends the third feedback signal, the control circuit also controls the power factor correction circuit to disconnect the connection between the battery pack and the dc conversion circuit.
A method for indicating the state of headlight of car includes
Detecting whether an operation of turning on a headlamp is performed on the automobile;
when the automobile is operated to turn on the headlamps, the method for monitoring the state of the automobile headlamp system with state feedback is carried out, and meanwhile, any one of the following operations is carried out:
when the instrument panel receives the first feedback signal, a high beam indicator lamp is turned on, when the instrument panel receives the second feedback signal, the indicator lamp is turned off, and when the instrument panel receives the third feedback signal, the indicator lamp is changed in color or flickers; or the vehicle-mounted sound equipment sends a first sound signal when receiving the first feedback signal, sends a second sound signal when receiving the second feedback signal, and sends a third sound signal when receiving the third feedback signal.
When the automobile is not operated to turn on the headlamps, the method for monitoring the state of the automobile headlamp system with state feedback is carried out, and meanwhile, any one of the following operations is carried out:
when the instrument panel receives the first feedback signal, the indicator lamp is turned off, when the second feedback signal is received, the indicator lamp is turned on, and when the third feedback signal is received, the indicator lamp is changed in color or flickered; or the vehicle-mounted sound equipment sends the second sound signal when receiving the first feedback signal, sends the first sound signal when receiving the second feedback signal, and sends the third sound signal when receiving the third feedback signal.
Furthermore, the control circuit and the instrument panel or the vehicle-mounted sound box are in data communication in a wired or wireless mode.
Compared with the prior art, the automobile headlamp system with the state feedback, the state monitoring method thereof and the automobile headlamp state indicating method provided by the invention have the advantages that the state feedback function is added on the basis of the existing automobile headlamp system, the state monitoring is carried out on each module in the automobile headlamp system through the control circuit, and the working state of the automobile headlamp system is judged to be normal or not by combining the state monitoring of the headlamp starting circuit and the state monitoring of the power factor correction circuit, the direct current conversion circuit and the low-frequency inverter circuit, and when the working state of the automobile headlamp system is abnormal, the automobile headlamp is damaged or the automobile headlamp system is in failure, and the judgment result is fed back to an automobile instrument panel or a vehicle-mounted sound box. The automobile instrument panel or the vehicle-mounted sound box can send out corresponding indication signals according to the received information so as to remind a driver of the current states of the automobile headlamp system and the automobile headlamp and ensure the driving safety at night.
Drawings
FIG. 1 is a schematic diagram of the components of an automotive headlamp system with state feedback according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of an automotive headlamp system with state feedback according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for monitoring the state of the headlamp system with state feedback of the automobile according to the embodiment of the invention;
FIG. 4 is a flow diagram of a headlamp status indication method based on dashboard indications;
fig. 5 is a flow chart diagram of a headlamp state indication method based on-board audio indication.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments and the accompanying drawings.
As shown in fig. 1, an automotive headlamp system with state feedback according to an embodiment of the present invention includes a power factor correction circuit 2, a dc conversion circuit 3, a low frequency inverter circuit 4, and a headlamp starter circuit 5, which are connected in sequence. The system is mainly applied to HID (high intensity discharge) xenon headlamp. In the system:
the dc conversion circuit 3 is configured to boost the voltage output by the vehicle battery pack 1 to a set value and output the voltage to the low-frequency inverter circuit 4. The voltage supplied by the battery pack 1 is low, and the voltage is increased to 400V by the direct current conversion circuit 3 and then supplied to the low-frequency inverter circuit 4. Therefore, the set value is generally set to 400V or more. The low frequency inverter circuit 4 is configured to invert the voltage boosted by the dc converter circuit 3 into an ac power and output the ac power to the headlamp starter circuit 5. When the system is applied to the HID xenon headlamp, as the HID xenon headlamp is filled with xenon or metal halide gas, the lamp has no filament, only two electrodes are needed, and high voltage needs to be established between the two electrodes to break down the gas and then generate arc light to light, so that the headlamp starting circuit 5 is arranged for boosting alternating current and outputting the boosted alternating current to the automobile headlamp 6 so as to drive the headlamp 6. The power factor correction circuit 2 is used for improving the power factor of the system and controlling the connection between the battery pack 1 and the direct current conversion circuit 3.
The automobile headlamp system also comprises a control circuit 7, wherein the control circuit 7 is connected with the power factor correction circuit 2, the direct current conversion circuit 3, the low-frequency inverter circuit 4 and the headlamp starting circuit 5 and is connected to an automobile instrument panel 8 or a vehicle-mounted sound box 9 for monitoring and controlling the working states of the power factor correction circuit 2, the direct current conversion circuit 3, the low-frequency inverter circuit 4 and the headlamp starting circuit 5. When the control circuit 7 monitors that the working state of the headlamp starting circuit 5 is normal, the automobile headlamp system is in a normal working state, and at the moment, the control circuit 7 sends a first feedback signal which indicates that the working state of the automobile headlamp system is normal to the instrument panel 8; when the control circuit 7 monitors that the working state of the headlamp starting circuit 5 is abnormal, but the working states of the power factor correction circuit 2, the direct current conversion circuit 3 and the low-frequency inverter circuit 4 are all normal, it indicates that the headlamp 6 is damaged, and at the moment, the control circuit 7 sends a second feedback signal indicating that the headlamp 6 is damaged to the instrument panel 8 or the vehicle-mounted sound box 9; when the control circuit 7 monitors that the working state of the headlamp starting circuit 5 is abnormal and at least one of the power factor correction circuit 2, the direct current conversion circuit 3 and the low-frequency inverter circuit 4 is abnormal, it is indicated that the power factor correction circuit 2, the direct current conversion circuit 3 or the low-frequency inverter circuit 4 is in failure but the headlamp 6 is damaged, and at the moment, the control circuit 7 sends a third feedback signal indicating the failure of the automobile headlamp system to the instrument panel 8 or the vehicle-mounted audio 9.
After the instrument panel 8 or the vehicle-mounted sound box 9 receives the first feedback signal, the second feedback signal or the third feedback signal, corresponding indication signals can be sent out to remind a driver of the current states of the automobile headlamp system and the automobile headlamp 6, and driving safety at night is ensured.
In this embodiment, the power factor correction circuit 2, the dc conversion circuit 3, the low frequency inverter circuit 4, and the headlamp starting circuit 5 are all fully-controlled power electronic devices, which can be controlled to be turned on and off by a control signal, and can be turned on and off by a driving signal sent by the control circuit 7.
As shown in fig. 2, in the present embodiment, the power factor correction circuit 2 includes an inductor L1, an NMOS transistor S0, and an NMOS transistor S1, one end of the inductor L1 is connected to the positive electrode of the battery pack 1, the other end of the inductor L1 is connected to the drain of the NMOS transistor S0 and the drain of the NMOS transistor S1, the source of the NMOS transistor S1 is connected to the negative electrode of the battery pack 1, and the source of the NMOS transistor S0 is connected to the input end of the dc conversion circuit 3.
The dc conversion circuit 3 includes an NMOS transistor S2, a diode D, and an inductor L2, the drain of the NMOS transistor S2 is connected to the power factor correction circuit 2 as the input terminal of the dc conversion circuit 3, the source of the NMOS transistor S2 is connected to the negative terminal of the diode D and one end of the inductor L2, the other end of the inductor L2 is connected to the input terminal of the low frequency inverter circuit 4 as the output terminal of the dc conversion circuit 3, and the positive terminal of the diode D is connected to the negative terminal of the battery pack 1.
The low-frequency inverter circuit 4 comprises an NMOS transistor S3, an NMOS transistor S4, an NMOS transistor S5 and an NMOS transistor S6, the NMOS transistor S3, the NMOS transistor S4, the NMOS transistor S5 and the NMOS transistor S6 form a unidirectional full-bridge inverter circuit, an input end of the unidirectional full-bridge inverter circuit (in the drawing, a connection end between the NMOS transistor S3 and the NMOS transistor S4 and a connection end between the NMOS transistor S4 and the NMOS transistor S5) is connected with an output end of the dc converter circuit 3 as an input end of the low-frequency inverter circuit 4, and an output end of the full-bridge unidirectional inverter circuit (in the drawing, a connection end between the NMOS transistor S3 and the NMOS transistor S4 and a connection end between the NMOS transistor S5 and the NMOS transistor S6) is connected with an input end of the low-frequency inverter circuit 4 as an output end of.
The headlamp starting circuit 5 comprises a bidirectional diode D2, a capacitor C3 and a transformer T1, one end of the bidirectional diode D2 is used as an input end of the headlamp starting circuit 5 and connected with an output end of the low-frequency inverter circuit 4 and used for accessing alternating current, the other end of the bidirectional diode D2 is connected with one end of the capacitor C3, the other end of the capacitor C3 is connected with a primary side of the transformer T1, a secondary side of the transformer T1 is connected with the headlamp 6, the alternating current is sequentially input into the primary side of the transformer T1 through the bidirectional diode D2 and the capacitor C3, and the transformer T1 boosts the alternating current and outputs the alternating current to the headlamp through the secondary side of the. When the headlight 6 is turned on, the diode D2 is turned off, and the low frequency inverter circuit 4 supplies power to the headlight 6. The existing headlamp system adopts the diode in the power factor correction circuit 2, which can not completely realize the effect, and before replacement and maintenance, a charging and discharging process is needed to be carried out every time the headlamp system is started and shut down. The headlamp system provided by the invention can realize the on-off state of each full-control power electronic device through the control signal of the control circuit 7, and can avoid the problem that the fault circuit cannot be completely cut off by the control of the existing headlamp system on the NMOS transistor S1 and the NMOS transistor S2.
Referring to fig. 3, a second embodiment of the present invention provides a method for monitoring the state of the automotive headlamp system with state feedback described in the first embodiment, the method including the following steps:
the control circuit 7 monitors the headlamp starting circuit 5 to detect whether the working state thereof is normal;
when the working state of the headlamp starting circuit 5 is normal, the control circuit 7 sends a first feedback signal indicating that the working state of the automobile headlamp system is normal to the instrument panel 8 or the vehicle-mounted sound box 9;
when the working state of the headlamp starting circuit 5 is abnormal, the control circuit 7 detects the working states of the power factor correction circuit 2, the direct current conversion circuit 3 and the low-frequency inverter circuit 4, and sends a second feedback signal indicating the damage of the headlamp 6 to the instrument panel 8 or the vehicle-mounted sound box 9 when the working states of the power factor correction circuit 2, the direct current conversion circuit 3 and the low-frequency inverter circuit 4 are all normal, and sends a third feedback signal indicating the system fault of the automobile headlamp to the instrument panel 8 or the vehicle-mounted sound box 9 when the working state of any one of the power factor correction circuit 2, the direct current conversion circuit 3 and the low-frequency inverter circuit 4 is abnormal;
and when the instrument panel 8 or the vehicle-mounted sound box 9 receives the first feedback signal, the second feedback signal or the third feedback signal, a corresponding indication signal is sent out. The indication signal sent by the instrument panel 8 is an optical signal of an indicator lamp in the instrument panel 8, and the indication signal sent by the car audio 9 is a sound signal.
After the control circuit 7 sends out the second feedback signal, the power factor correction circuit 2 is controlled to disconnect the connection between the battery pack 1 and the direct current conversion circuit 3, and after the third feedback signal is sent out, the power factor correction circuit 2 is also controlled to disconnect the connection between the battery pack 1 and the direct current conversion circuit 3, so that a fault circuit is cut off.
The third embodiment of the invention provides a method for indicating the state of an automobile headlamp, which comprises the following steps:
it is detected whether the vehicle is operated to turn on the headlamps 6. The method of monitoring the state of the vehicle headlamp system with state feedback as described above in the second embodiment is performed when the vehicle is subjected to an operation of turning on the headlamp 6, and at the same time, any one of the following operations is performed:
when the instrument panel 8 receives the first feedback signal, the working state of the headlamp system is normal, the automobile is operated to turn on the headlamp 6, and the high beam indicator lamp is turned on when the headlamp 6 is actually in the on state; when the second feedback signal is received, the damage of the headlamp 6 is indicated, and the indicator lamp is turned off to remind a driver that the headlamp 6 is damaged; when the third feedback signal is received, the failure of the automobile headlamp system is indicated, and the indicator lamp is changed in color or flickers. Or the vehicle-mounted sound box 9 sends out a first sound signal to prompt that the headlamp is normally started when receiving the first feedback signal, sends out a second sound signal to prompt that the headlamp is damaged when receiving the second feedback signal, and sends out a third sound signal to prompt that the headlamp system is in failure when receiving the third feedback signal.
The method of monitoring the state of the above vehicle headlamp system with state feedback in the second embodiment is also performed when the vehicle is not subjected to the operation of turning on the headlamp 6, and at the same time, any of the following operations is performed:
when the instrument panel 8 receives the first feedback signal, the working state of the headlamp system is normal, the automobile is not operated to turn on the headlamp 6, and the indicator light is turned off when the headlamp 6 is actually turned off; when the second feedback signal is received, it indicates that the headlight 6 is damaged, and the vehicle is not operated to turn on the headlight 6, so that the indicator lamp is turned on to warn the driver that the headlight 6 is damaged. When the third feedback signal is received, the failure of the automobile headlamp system is indicated, and the indicator lamp is changed in color or flickers. Or the vehicle-mounted sound box 9 sends out a first sound signal to prompt that the headlamp is normally extinguished when receiving the first feedback signal, sends out a second sound signal to prompt that the headlamp is damaged when receiving the second feedback signal, and sends out a third sound signal to prompt that the headlamp system is in fault when receiving the third feedback signal.
Fig. 4 and 5 are schematic flow diagrams of a headlamp state indicating method based on instrument panel indication and a headlamp state indicating method based on vehicle-mounted sound indication, respectively.
The first sound signal is used for prompting that the headlamp is normally turned on or turned off, the second sound signal is used for prompting that the headlamp is damaged, and the third sound signal is used for prompting the fault of an automobile headlamp system. The specific content of each sound signal can be set at will as long as the corresponding meaning can be clearly indicated. In the present invention, the headlight state can be indicated using the instrument panel 8 or the headlight state can be indicated using the car audio 9, according to the user's needs. The invention can master the actual working state of the automobile headlamp and whether the automobile headlamp system works normally or not through monitoring the automobile headlamp system in real time, ensures the driving safety and particularly plays a role in improving the safety of driving at night.
In the present embodiment, the control circuit 7 performs data communication with the instrument panel 8 or the car audio 9 by wire or wireless.
The above-described embodiments are merely preferred embodiments, which are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An automobile headlamp system with state feedback is characterized by comprising a power factor correction circuit, a direct current conversion circuit, a low-frequency inverter circuit and a headlamp starting circuit which are connected in sequence;
the direct current conversion circuit is used for boosting the voltage output by the automobile battery pack to a set value and then outputting the voltage to the low-frequency inverter circuit;
the low-frequency inverter circuit is used for inverting the voltage boosted by the direct-current conversion circuit into alternating current and outputting the alternating current to the headlamp starting circuit;
the headlamp starting circuit is used for boosting the alternating current and then outputting the boosted alternating current to an automobile headlamp so as to drive the headlamp;
the power factor correction circuit is used for improving the power factor of a system and controlling the connection between the battery pack and the direct current conversion circuit to be switched on and off;
the system also comprises a control circuit which is connected with the power factor correction circuit, the direct current conversion circuit, the low-frequency inverter circuit and the headlamp starting circuit and is connected to an automobile instrument panel or a vehicle-mounted sound box and is used for monitoring and controlling the working states of the power factor correction circuit, the direct current conversion circuit, the low-frequency inverter circuit and the headlamp starting circuit, sending a first feedback signal indicating that the working state of the automobile headlamp system is normal to the instrument panel or the vehicle-mounted sound box when the working state of the headlamp starting circuit is monitored to be normal, and sending a second feedback signal indicating that the headlamp is damaged to the instrument panel or the vehicle-mounted sound box when the working state of the headlamp starting circuit is abnormal but the working states of the power factor correction circuit, the direct current conversion circuit and the low-frequency inverter circuit are all normal, and when the working state of the headlamp starting circuit is abnormal and at least one of the power factor correction circuit, the direct current conversion circuit and the low-frequency inverter circuit is abnormal, sending a third feedback signal representing the fault of the automobile headlamp system to an instrument panel or a vehicle-mounted sound.
2. The vehicle headlamp system with state feedback as defined in claim 1, wherein the power factor correction circuit, the dc converter circuit, the low frequency inverter circuit and the headlamp starter circuit are all fully-controlled power electronics.
3. The automotive headlamp system with state feedback as claimed in claim 1 or 2, wherein the power factor correction circuit comprises an inductor L1, an NMOS transistor S0 and an NMOS transistor S1, one end of the inductor L1 is connected to the positive electrode of the battery pack, the other end of the inductor L1 is connected to the drain of the NMOS transistor S0 and the drain of the NMOS transistor S1, the source of the NMOS transistor S1 is connected to the negative electrode of the battery pack, and the source of the NMOS transistor S0 is connected to the input terminal of the dc conversion circuit.
4. The automotive headlamp system with state feedback as claimed in claim 1 or 2, wherein the dc converter circuit comprises an NMOS transistor S2, a diode D and an inductor L2, a drain of the NMOS transistor S2 is connected to the pfc circuit as an input of the dc converter circuit, a source of the NMOS transistor S2 is connected to a cathode of the diode D and one end of the inductor L2, the other end of the inductor L2 is connected to an input of the low frequency inverter circuit as an output of the dc converter circuit, and an anode of the diode D is connected to a cathode of the battery pack.
5. The automotive headlamp system with state feedback as claimed in claim 1 or 2, wherein the low-frequency inverter circuit comprises an NMOS transistor S3, an NMOS transistor S4, an NMOS transistor S5 and an NMOS transistor S6, the NMOS transistor S3, the NMOS transistor S4, the NMOS transistor S5 and the NMOS transistor S6 form a unidirectional full-bridge inverter circuit, an input end of the unidirectional full-bridge inverter circuit is connected with an output end of the dc converter circuit as an input end of the low-frequency inverter circuit, and an output end of the unidirectional full-bridge inverter circuit is connected with an input end of the headlamp starter circuit as an output end of the low-frequency inverter circuit.
6. The automotive headlamp system with state feedback as claimed in claim 1 or 2, wherein the headlamp starter circuit comprises a bidirectional diode D2, a capacitor C3 and a transformer T1, one end of the bidirectional diode D2 is connected to an output terminal of the low frequency inverter circuit as an input terminal of the headlamp starter circuit for receiving the alternating current, the other end of the bidirectional diode D2 is connected to one end of a capacitor C3, the other end of the capacitor C3 is connected to a primary side of a transformer T1, a secondary side of the transformer T1 is connected to the headlamp, the alternating current is sequentially input to the primary side of the transformer T1 through a bidirectional diode D2 and a capacitor C3, and the transformer T1 boosts the alternating current and outputs the boosted alternating current to the headlamp through the secondary side thereof to drive the headlamp.
7. A method of monitoring the status of a vehicle headlamp system with status feedback as claimed in any of claims 1 to 6, comprising the steps of:
the control circuit monitors the headlamp starting circuit to detect whether the working state of the headlamp starting circuit is normal or not;
when the working state of the headlamp starting circuit is normal, the control circuit sends a first feedback signal indicating that the working state of the automobile headlamp system is normal to the instrument panel or the vehicle-mounted sound;
when the working state of the headlamp starting circuit is abnormal, the control circuit detects the working states of the power factor correction circuit, the direct current conversion circuit and the low-frequency inverter circuit, and sends a second feedback signal indicating the damage of the headlamp to the instrument panel or the vehicle-mounted sound equipment when the working states of the power factor correction circuit, the direct current conversion circuit and the low-frequency inverter circuit are all normal, and sends a third feedback signal indicating the fault of the automobile headlamp system to the instrument panel or the vehicle-mounted sound equipment when the working state of any one of the power factor correction circuit, the direct current conversion circuit and the low-frequency inverter circuit is abnormal;
and when the instrument panel or the vehicle-mounted sound receives the first feedback signal, the second feedback signal or the third feedback signal, sending out a corresponding indication signal.
8. The method of claim 7, wherein the control circuit controls the pfc circuit to disconnect the battery pack from the dc converter circuit after the second feedback signal is issued, and also controls the pfc circuit to disconnect the battery pack from the dc converter circuit after the third feedback signal is issued.
9. A method for indicating the state of a headlamp of an automobile is characterized by comprising
Detecting whether an operation of turning on a headlamp is performed on the automobile;
when the vehicle is subjected to an operation of turning on the headlamps, the method of claim 7 or 8 is performed, and at the same time, any of the following operations is performed:
when the instrument panel receives the first feedback signal, a high beam indicator lamp is turned on, when the instrument panel receives the second feedback signal, the indicator lamp is turned off, and when the instrument panel receives the third feedback signal, the indicator lamp is changed in color or flickers; or the vehicle-mounted sound equipment sends a first sound signal when receiving the first feedback signal, sends a second sound signal when receiving the second feedback signal, and sends a third sound signal when receiving the third feedback signal;
when the vehicle is not subjected to an operation of turning on the headlamps, the method of claim 7 or 8 is performed, and at the same time, any of the following operations is performed:
when the instrument panel receives the first feedback signal, the indicator lamp is turned off, when the second feedback signal is received, the indicator lamp is turned on, and when the third feedback signal is received, the indicator lamp is changed in color or flickered; or the vehicle-mounted sound equipment sends the second sound signal when receiving the first feedback signal, sends the first sound signal when receiving the second feedback signal, and sends the third sound signal when receiving the third feedback signal.
10. The vehicle headlamp status indicating method according to claim 9, wherein the control circuit is in data communication with the dashboard or the car audio by wire or wirelessly.
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| CN201910393344.6A CN110065430B (en) | 2019-05-13 | 2019-05-13 | Automobile headlamp system with state feedback and state monitoring method thereof |
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| CN201910393344.6A CN110065430B (en) | 2019-05-13 | 2019-05-13 | Automobile headlamp system with state feedback and state monitoring method thereof |
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| CN110065430A CN110065430A (en) | 2019-07-30 |
| CN110065430B true CN110065430B (en) | 2020-07-21 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201018704Y (en) * | 2007-03-19 | 2008-02-06 | 余启发 | Digitalized intelligent power supply of electromagnetic induction lamp |
| CN108569212A (en) * | 2017-10-27 | 2018-09-25 | 常州星宇车灯股份有限公司 | A kind of fault diagnosis reponse system of automobile LED car light |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10166912B2 (en) * | 2016-08-19 | 2019-01-01 | Sl Corporation | Automotive LED driving apparatus |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201018704Y (en) * | 2007-03-19 | 2008-02-06 | 余启发 | Digitalized intelligent power supply of electromagnetic induction lamp |
| CN108569212A (en) * | 2017-10-27 | 2018-09-25 | 常州星宇车灯股份有限公司 | A kind of fault diagnosis reponse system of automobile LED car light |
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