CN110618723B

CN110618723B - Vehicle-mounted electronic system, voltage self-adaptive control method thereof and vehicle

Info

Publication number: CN110618723B
Application number: CN201810634670.7A
Authority: CN
Inventors: 郝兴峰; 蔡永荣
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2018-06-20
Filing date: 2018-06-20
Publication date: 2021-08-10
Anticipated expiration: 2038-06-20
Also published as: CN110618723A

Abstract

The invention discloses a vehicle-mounted electronic system, a voltage self-adaptive control method thereof and a vehicle, wherein the vehicle-mounted electronic system comprises an electronic device and a power supply device, and the electronic device comprises at least one circuit module; the power supply device comprises an acquisition module, an adjusting module and a control module; the acquisition module is used for acquiring external input power supply parameters; the control module is used for sending out an adjusting signal according to the change of an external input power supply parameter, and the adjusting module is connected with the circuit module and used for adjusting the input voltage of the circuit module according to the adjusting signal. The voltage self-adaptive adjustment is carried out on the circuit module of the vehicle-mounted electronic system according to the external input power supply parameters, so that the influence of sudden change of the external input voltage is avoided, and the working reliability and stability of the system are improved.

Description

Vehicle-mounted electronic system, voltage self-adaptive control method thereof and vehicle

Technical Field

The invention belongs to the technical field of vehicles, and particularly relates to a vehicle-mounted electronic system, a vehicle with the vehicle-mounted electronic system and a voltage self-adaptive control method of the vehicle-mounted electronic system.

Background

The automotive industry, as a national economic support industry, has developed rapidly in recent years. With the development of the whole automobile, the core technology of automobile parts is also obviously improved. However, the performance of the parts of the automobile still cannot meet the increasingly high requirements of the whole automobile.

At present, a traditional automobile generally adopts a storage battery-generator to supply power to a vehicle-mounted electronic system. Under normal conditions, the nominal voltage of the vehicle-mounted electronic system is 12V or 24V, the 12V electric system can realize all functions within the voltage range of 9V-16V, and the 24V electric system can realize all functions within the voltage range of 18V-32V. However, in some abnormal situations or severe working environments, the output voltage of the battery or the generator fluctuates greatly, causing the functions of the vehicle-mounted equipment connected with the battery or the generator to be invalid and even seriously damaged.

For example, when fuses of other modules in the same electrical system melt due to overcurrent, the power supply voltage of the vehicle electronic system may drop instantaneously, for example, 12V drops instantaneously to 4.5V, 24V drops instantaneously to 9V, and the voltage is maintained for tens of milliseconds, and at this time, the vehicle electronic system may fail to function or be protected from overheating. When the whole vehicle collides, the power supply voltage of the vehicle-mounted electronic system falls to a very low level, for example, the voltage of 12V falls to 3.6V, the voltage is maintained for a few milliseconds, then the voltage rises to 4.7V, and the voltage is maintained for a few ms, so that the vehicle-mounted electronic system cannot normally work, and the requirement of most vehicle enterprises is not met. When the vehicle is started in cold areas or abnormally started with gears, the power supply voltage of the vehicle-mounted electronic system can be reduced below a normal working voltage range and is mixed with alternating current components with certain frequency, the vehicle-mounted electronic system is possibly abnormal or damaged, and when some domestic automobile enterprises require the cold start of the vehicle in northern areas, the combination instrument and the external lighting lamp product need to work normally, so that most functions are realized. When the storage battery is gradually discharged, the voltage at two ends of the storage battery is slowly reduced to 0V from the normal working voltage at the rate of about 0.5V/min, and when the storage battery is charged, the voltage is slowly increased to the normal working voltage from 0V at the same rate, and at the moment, the function failure or damage of the vehicle-mounted electronic system can occur. The functional failures include but are not limited to self-learning failures, partial functions of the vehicle-mounted electronic system after being powered on are realized by judging the number of specific messages sent by the whole vehicle within a certain time, the MCU starts to receive the whole vehicle messages and time through the CAN transceiver after working, if the specific messages with the certain number of frames are not received within the specified time, the self-learning failures are considered, but the general MCU works first, the CAN transceiver works later, and the self-learning failures occur when the voltage slowly decreases. When switching transient processes such as inductive load cut-off, relay contact bounce and the like occur in the pure electric vehicle and the hybrid electric vehicle, an electric fast transient pulse group with high amplitude and low energy can be generated, so that the normal work of a vehicle-mounted electronic system is seriously interfered, and even products are damaged.

In a word, most of the existing vehicle-mounted electronic systems are in an early evaluation stage, and potential failure modes, consequences and reasons of products are not fully considered, so that once the external voltage fluctuates to a value outside a normal voltage range, the system functions are invalid and even devices are damaged, and the reliability and the user experience of the whole vehicle are seriously reduced.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the embodiment of the invention provides a vehicle-mounted electronic system, which can perform voltage self-adaptation and improve the stability.

The embodiment of the invention also provides a vehicle comprising the vehicle-mounted electronic system and a voltage self-adaptive control method of the vehicle-mounted electronic system.

In order to solve the above problem, an in-vehicle electronic system according to an embodiment of a first aspect of the present invention includes: an electronic device comprising at least one circuit module; a power supply device, the power supply device comprising: the acquisition module is used for acquiring external input power supply parameters; the control module is used for sending out an adjusting signal according to the change of the external input power supply parameter; and the adjusting module is connected with the circuit module and used for adjusting the input voltage of the circuit module according to the adjusting signal.

According to the vehicle-mounted electronic system disclosed by the embodiment of the invention, the power supply of the circuit module is subjected to self-adaptive control according to the change of the external input power supply parameter, the fluctuation of the power supply along with the sudden change of the external input power supply parameter is avoided, and the working stability and reliability of the system are improved.

In order to solve the above problem, a vehicle according to an embodiment of a second aspect of the present invention includes the in-vehicle electronic system according to the embodiment of the first aspect.

According to the vehicle provided by the embodiment of the invention, by adopting the vehicle-mounted electronic system in the embodiment of the aspect, the input voltage of the circuit module can be adaptively adjusted according to the change of the external input power supply parameter, the normal work of the circuit module is ensured, and the stability and the reliability are improved.

In order to solve the above problem, a voltage adaptive control method for an in-vehicle electronic system according to an embodiment of a third aspect of the present invention is a voltage adaptive control method for an in-vehicle electronic system including an electronic apparatus including at least one circuit module and a power supply apparatus, the method including: the power supply device collects external input power supply parameters of the vehicle-mounted electronic system; the power supply device sends out an adjusting signal according to the change of the external input power supply parameter; and the power supply device regulates the input voltage of the circuit module of the vehicle-mounted electronic system according to the regulating signal.

According to the voltage self-adaptive control method of the vehicle-mounted electronic system, the power supply of the circuit module is controlled in a self-adaptive mode according to the change of the external input power supply parameters, the fluctuation of the power supply of the system along with the sudden change of the external input power supply parameters can be avoided, and the working stability and reliability of the vehicle-mounted electronic system are improved.

Drawings

FIG. 1 is a functional block diagram of an in-vehicle electronic system according to an embodiment of the present invention;

FIG. 2 is a functional block diagram of an in-vehicle electronic system according to one embodiment of the present invention;

FIG. 3 is a schematic diagram of a vehicle power distribution according to one embodiment of the present invention;

FIG. 4 is a functional block diagram of a pre-processing module according to one embodiment of the invention;

FIG. 5 is a circuit schematic of a pre-processing module according to one embodiment of the invention;

FIG. 6 is a functional block diagram of a vehicle according to an embodiment of the present invention;

FIG. 7 is a flow chart of a method of adaptive control of voltage of an on-board electronic system according to an embodiment of the present invention;

figure 8 is a schematic diagram of a power topology for a 12.3 inch full liquid crystal instrumentation system according to one embodiment of the present invention,

FIG. 9 is a flow chart of a voltage adaptive control method for a 12.3 inch full liquid crystal instrumentation system according to one embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

An in-vehicle electronic system according to an embodiment of the first aspect of the invention is described below with reference to the drawings.

Fig. 1 is a block diagram of an in-vehicle electronic system according to an embodiment of the present invention, and as shown in fig. 1, an in-vehicle electronic system 100 of an embodiment of the present invention includes an electronic device 10 and a power supply device 20.

The electronic device 10 includes, for example, a combination meter of a vehicle, an exterior lighting fixture product, and the like, and includes at least one circuit module 11, for example, a meter circuit, a lighting lamp circuit, and the like.

The power supply device 20 includes an acquisition module 21, a regulation module 22, and a control module 23. The acquisition module 21 is configured to acquire an externally input power supply parameter, and generally, a storage battery-generator is used to supply power to the vehicle-mounted electronic system, so that the acquisition module 21 may acquire a voltage provided by the storage battery or the generator to a power supply network; the adjusting module 22 is connected to the circuit module 11 and configured to adjust an input voltage of the circuit module 11 according to the adjusting signal; the control module 23 is used for sending out an adjusting signal according to the change of the external input power supply parameter.

Specifically, the control module 23 monitors the externally input power supply parameter, for example, if the externally input power supply parameter is reduced below a threshold value, the power consumption of the circuit module 11 is reduced while still ensuring that the circuit module is in an effective working state, or the power consumption of the circuit module 11 is turned off, otherwise, if the externally input power supply parameter is above the threshold value, the power supply to the circuit module 11 may be turned on, so that the power supply to the circuit module 11 may be dynamically adjusted according to the fluctuation of the externally input power supply, thereby implementing self-adaptation to the externally input power supply, improving stability, and avoiding device damage.

According to the vehicle-mounted electronic system 100 of the embodiment of the invention, the acquisition module 21 acquires the externally input power supply parameters, and the power supply of the circuit module 11 is adaptively controlled according to the change of the externally input power supply parameters, so that the fluctuation caused by the sudden change of the externally input power supply parameters is avoided, and the working stability and reliability of the system are improved.

In summary, the voltage adaptation of the in-vehicle electronic system 100 according to the embodiment of the present invention relates to the general idea that: in terms of hardware, the topological structure of the power supply device 20 of the vehicle-mounted electronic system 100 is adjusted, the electromagnetic compatibility design of the hardware is optimized, and a plurality of acquisition circuits are designed to accurately and comprehensively acquire external input power supply parameters of the vehicle-mounted electronic system 100 in real time; in the aspect of software, compared with the collected voltage value and the set threshold value, the current consumed by some circuit modules is properly reduced through a specific software algorithm. When the external input voltage of the in-vehicle electronic system 100 falls below the normal operating voltage range, the input voltage of the circuit module 11 is ensured to be stable, thereby ensuring the normal operation of the in-vehicle electronic system 100.

The following further illustrates the hardware and software improvements of the in-vehicle electronic system 100 according to the embodiment of the present invention by way of example, respectively.

In some embodiments of the present invention, as shown in fig. 2, the acquisition module 21 of embodiments of the present invention includes a digital acquisition circuit 211 and an analog acquisition circuit 212. The input end of the digital acquisition circuit 211 is connected to the external ignition signal processing circuit, the first output end of the digital acquisition circuit 211 is connected to the first interrupt port INT1 of the control module 23, the second output end of the digital acquisition circuit 211 is connected to the second interrupt port INT2 of the control module 23, and the digital acquisition circuit 211 is configured to acquire an ignition signal. The input end of the analog acquisition circuit 212 is connected with the power supply network of the vehicle, and the output end of the analog acquisition circuit 212 is connected with the analog-to-digital conversion port AD1 of the control module 23, and is used for acquiring the constant voltage provided by the power supply network. Through the combination of digital acquisition and analog liniment, the acquisition of the externally input power supply parameters can be more accurate, comprehensive and reliable.

Further, as shown in fig. 3, a power distribution schematic diagram of a whole vehicle of a vehicle according to an embodiment of the present invention is shown, wherein the external ignition signal processing circuit 213 of the embodiment of the present invention includes a control switch K, a first terminal 1 of the control switch K is connected to a power supply network, a second terminal 2 of the control switch K is connected to the digital acquisition circuit 211, and a third terminal 3 of the control switch K is connected to a body controller BCM of the vehicle.

Specifically, as shown in fig. 2 and 3, the engine or the power battery provides mechanical energy to the generator, the generator converts the mechanical energy into electrical energy, and the output voltage is regulated by the voltage regulator and then connected to the power supply network for the storage battery and the vehicle-mounted electronic system 100. One circuit (hereinafter referred to as normal power) of the power supply network is directly connected with the vehicle-mounted electronic system 100, and the other circuit (hereinafter referred to as IG1 power) is connected with the vehicle-mounted electronic system 100 through a control switch K, wherein the control switch K is controlled by a vehicle body control module BCM. In the embodiment of the invention, the vehicle-mounted electronic system only uses normal electricity as power supply input, and IG1 electricity only uses ignition signal input, so that the IG1 electricity input end does not need to be added with preprocessing circuits such as an anti-reverse diode and the like, thereby not only reducing the cost, but also reducing the design difficulty of a Printed Circuit Board (PCB). As shown in fig. 2, the IG1 electric VIG1 is connected to the digital acquisition circuit 211, and by adjusting the switching threshold of the digital acquisition circuit 211, two break ports of the corresponding control module 23 can start jumping sequentially when the VIG1 has different voltage levels. When the INT1 of the first interrupt port of the control module 23 starts to jump, which means that the VIG1 (ignition signal) meets the power-on requirement, the control module 23 controls the regulation module 22 to be turned on through a GPIO (General Purpose Input/Output) port, and drives the corresponding circuit module 11 to operate, thereby implementing all functions of the vehicle-mounted electronic system 100 under the IG1 power

In the embodiment of the present invention, as shown in fig. 2, the power supply device 20 of the embodiment of the present invention further includes a preprocessing module 24, an input end of the preprocessing module 24 is connected to the power supply network, an output end of the preprocessing module 24 is connected to the adjusting module 22 and an input end of the analog acquisition circuit 212, respectively, and the preprocessing module 24 preprocesses the external input power supply parameter, for example, when the external input power supply parameter is reduced, the preprocessing module may provide a supplementary current, and perform interference processing such as filtering, anti-electromagnetic processing, or anti-surge processing on the external input power supply parameter.

In some embodiments, as shown in fig. 4, the pre-processing module 24 includes a tank circuit 241, and the tank circuit 241 is used for providing a supplementary current for the circuit module 11 when the external input voltage drops, for example, fig. 5 is a schematic diagram of the pre-processing circuit according to an embodiment of the present invention, as shown in fig. 5, the tank circuit 241 includes electrolytic capacitors C3, C5, and C7, and provides the current required for normal operation of the subsequent circuit module 11 when the external input voltage drops, so as to maintain the input voltage of some circuit modules 11 with higher requirements for accuracy of the operating voltage to be stable.

In some embodiments, as shown in fig. 4, the pre-processing module 24 further includes an electrical fast transient burst immunity circuit 242 and a surge immunity circuit 243, the electrical fast transient burst immunity circuit 242, the surge immunity circuit 243 and the tank circuit 241 being connected in parallel, respectively. For example, as shown in fig. 5, the electrical fast transient burst immunity circuit 242 includes a TVS transistor D2, which has a fast response speed and is effective for electrical fast transient bursts; surge immunity circuit 243 includes gas tube G1, and gas tube G1 may be used to resist surge. The gas discharge tube G1 and the TVS tube can suppress voltage spikes of the external input voltage of the in-vehicle electronic system 100, and protect the internal circuit.

In one embodiment of the present invention, as shown in fig. 4, the preprocessing module 24 may further include an electromagnetic compatibility circuit 244, and the electromagnetic compatibility circuit 244 is connected in parallel with the electrical fast transient burst immunity circuit 242, the surge shock immunity circuit 243, and the tank circuit 241, respectively. For example, as shown in fig. 5, the electromagnetic compatibility circuit 244 may include ceramic capacitors (C1, C2, C3, C6, C8), a common mode inductor LCM1, a power inductor L1, a ferrite bead FB1, and resistors, etc. to improve the electromagnetic compatibility of the product. In some embodiments, as shown in fig. 5, a diode D1 may also be provided in the pre-set processing module 24 to prevent power from being turned on and damaging the circuit.

In an embodiment of the present invention, as shown in fig. 2, the regulating module 22 may include a voltage dropping circuit, or a voltage boosting circuit, or a combination of a voltage dropping circuit and a voltage boosting circuit. After passing through the preprocessing module 24, the constant voltage VBAT is respectively supplied to the controllable voltage-reducing circuit and the controllable voltage-increasing circuit, and the voltage of the circuit module 11 is more stable through the adjustment of the adjusting module 22.

In some embodiments, as shown in fig. 2, the regulating module 22 includes a first voltage-reducing circuit 221 and a first voltage-boosting circuit 222, an input terminal of the first voltage-reducing circuit 221 is connected to an output terminal of the preprocessing module 24, an output terminal of the first voltage-reducing circuit 221 is connected to an input terminal of the first voltage-boosting circuit 222, a control terminal of the first voltage-reducing circuit 221 is connected to the first IO port IO1 of the control module 23, an output terminal of the first voltage-boosting circuit 222 is connected to an input terminal of the first circuit module 111, and a control terminal of the first voltage-boosting circuit 222 is connected to the second IO port IO2 of the control module 23. In the embodiment of the present invention, the normal operating voltage range of the first circuit module 111 is narrow, the requirement on the accuracy of the operating voltage is high, a power supply topology structure that the voltage is reduced first and then increased is adopted, of course, the VCC2 obtained by reducing the voltage can also be supplied to other circuit modules, when the voltage of the normal voltage VBAT is reduced to the lower voltage limit of the normal operation of the voltage reduction circuit, the VCC2 starts to fluctuate, the first voltage boost circuit 222 can boost the fluctuating VCC2 to ensure the normal operation of the first circuit module 111, and the energy storage circuit 241, such as an electrolytic capacitor combination, used for storing energy in the preprocessing module 24 is matched to maintain the operating voltage of the first circuit module 111 stable. When the external input voltage of the electronic system 100 drops below the normal operating voltage range, the system can ensure the input voltage of some circuit modules with high requirements on the operating voltage precision to be stable, thereby ensuring the normal operation of the vehicle-mounted electronic system 100.

In some embodiments of the present invention, as shown in fig. 2, the adjusting module 22 includes a second voltage-reducing circuit 223 and a third voltage-reducing circuit 224, an input terminal of the second voltage-reducing circuit 223 is connected to an output terminal of the preprocessing module 24, an output terminal of the second voltage-reducing circuit 223 is connected to the digital power terminal DVCC of the control module 23, an input terminal of the third voltage-reducing circuit 224 is connected to an output terminal of the preprocessing module 24, an output terminal of the third voltage-reducing circuit 224 is connected to the analog circuit module 110, and a control terminal of the third voltage-reducing circuit 224 is connected to the analog circuit pull-up power terminal AVRH of the control module 23.

Specifically, the digital power supply connected to the digital power supply terminal DVCC of the control module 23 may be provided by a low-voltage-difference voltage-reducing circuit, which is used for supplying power by using one low-voltage-difference voltage-reducing circuit on one hand, considering that the analog circuit is easily interfered by other circuits; on the other hand, the analog circuit of the vehicle-mounted electronic system 100 is often used for collecting and diagnosing external signals of a product, and in an extreme case, an external fault may cause an overcurrent of a pull-up power supply of the analog circuit, so that the voltage reduction circuit is damaged. If the existing scheme is adopted, the analog circuit and the control module 23 share one voltage reduction circuit, which undoubtedly affects the normal operation of the control module 23, thereby causing the whole system to be broken down. Of course, the reference power of the analog-to-digital converter in the control module 23 and the pull-up power of the analog circuit should be kept consistent to ensure the effectiveness of the analog circuit.

In short, the digital power supply terminal DVCC and the analog circuit pull-up power supply terminal AVRH of the control module 23 use two voltage reduction circuits to supply power respectively, which can not only prevent voltage fluctuation of other circuit modules inside the system from affecting normal operation of the analog circuit, but also prevent external faults of the system from causing overcurrent of the analog circuit pull-up power supply terminal AVRH to damage the voltage reduction circuits, thereby affecting acquisition and diagnosis of external signals of the product.

In some embodiments of the present invention, as shown in fig. 2, the regulating module 22 further includes a fourth voltage-reducing circuit 225, an input terminal of the fourth voltage-reducing circuit 225 is connected to the output terminal of the preprocessing module 24, an output terminal of the fourth voltage-reducing circuit 225 is connected to the second circuit module 112, and a control terminal of the fourth voltage-reducing circuit 225 is connected to the third IO port IO3 of the control module 23.

In some embodiments, as shown in fig. 2, the regulating module 22 further includes a second voltage boosting circuit 226, an input terminal of the second voltage boosting circuit 226 is connected to the output terminal of the preprocessing module 24, an output terminal of the second voltage boosting circuit 226 is connected to the third circuit module 113, and a control terminal of the second voltage boosting circuit 226 is connected to the PWM port of the control module 23.

The control module 23 may send an adjustment signal to the corresponding buck circuit and boost circuit through the GPIO port according to a change in an external input power supply parameter, so as to implement on/off of the first circuit module 111, the second circuit module 112, and the third circuit module 113, and input voltage adjustment or shutdown.

The software control implementation voltage adaptive strategy of the control module 23 according to the embodiment of the present invention is further described below with reference to four tests of instantaneous voltage drop, collision voltage drop, starting voltage disturbance, and gradual voltage drop and rise.

In the embodiment of the present invention, the control module 23 is configured to perform cache initialization when the voltage of the ignition signal and the normal voltage reach a first threshold; or, when the voltage of the ignition signal and the normal voltage reach a second threshold, sending a start signal to the adjusting module 22 to start the power supply of the circuit module 11, where the second threshold is greater than the first threshold; alternatively, when the voltage of the ignition signal and the constant voltage reach a third threshold value, which is greater than the first threshold value and greater than the second threshold value, a reduction signal is issued to the adjustment module 22 to reduce the supply current of the circuit module 11.

Specifically, referring to fig. 2, when the voltage of the constant voltage VBAT and IG1 and the voltage of the VIG1 rises to the first threshold, for example, set to U1, the level of the corresponding first interrupt port INT1 of the control module 23 transitions through level transition of the digital acquisition circuit 211, and the system determines that the ignition signal (VIG1) is valid, and starts to initialize the buffer of the control module 23. In addition, by adjusting the switching threshold of the digital acquisition circuit 211, it is ensured that the reference power supply AVRH of the analog acquisition circuit 212 starts to be stable when the voltage reaches U1. Subsequently, when the voltage of the constant voltage VBAT and the voltage of the electric VIG1 of the IG1 rise to the second threshold U2(U1 < U2), the level of the second interrupt port INT2 of the corresponding control module 23 jumps, and at this time, the analog-to-digital conversion port AD1 reaches the set threshold range, and the control module 23 sequentially turns on the first circuit module 111, the second circuit module 112, and the third circuit module 113 through the GPIO ports. At this point, the voltage U2 ensures that the control module 23 and CAN transceiver are working properly and self-learning CAN begin if some functions of the system need to be identified adaptively. On the contrary, when the voltage of the constant voltage VBAT and the voltage of the IG1 and the voltage of the VIG1 drop to the third threshold U3(U1 < U3 < U2), the level of the second interrupt port INT2 of the corresponding control module 23 jumps, and at the same time, the analog-to-digital conversion port AD1 reaches the set threshold range, at this time, the software immediately reduces the current consumed by the first circuit module 112 and the third circuit module 113 through a specific algorithm and maintains a certain time t1, thereby ensuring that the input voltages of the first circuit module 112 and the third circuit module 113 with higher requirements on the accuracy of the operating voltage are stable. In the embodiment of the present invention, the strategy of reducing the load current needs to ensure that all circuit modules 11 can still work normally, and the change cannot be obviously sensed by the user. For example, the liquid crystal screen is appropriately decreased in brightness or flickers at a certain frequency f1 (the on-off time is comparable), and the user cannot perceive such a short-time change due to the visual sticking effect.

In the embodiment of the present invention, the control module 23 is further configured to record a maintaining time when the voltage of the ignition signal and the constant voltage reach the third threshold, and send a closing signal to the adjusting module 22 to close the power supply of the circuit module 11 when the maintaining time reaches a preset time.

Specifically, when the level of the second interrupt port INT2 of the control module 23 jumps, the AD1 of the analog acquisition circuit 212 reaches the set threshold range, and the timer starts to count, and the timer time exceeds the preset time t2, the control module 23 determines that the external input voltage is in the low-voltage state for a long time, immediately starts the low-voltage protection strategy, turns off the power supplies of all the circuit modules 11, and prevents the system from being in the low-voltage state for a long time and from being abnormal. In the embodiment, in consideration of the fault tolerance of the system, the time t2 cannot be too short, otherwise, false triggering is easy to occur, and the user experience is affected; and, the hysteresis of the switching threshold of the digital acquisition circuit 211 cannot be too large, i.e., the voltage difference (U2-U3) between two transitions of the level of the second interrupt port INT 2.

In short, in the embodiment of the present invention, when the voltage drops instantaneously, the collision voltage drops, the starting voltage disturbance, and the voltage slow drop, the control module 23 distinguishes whether the external input voltage is at the instantaneous low voltage or the long-term low voltage according to the level state of the second interrupt port INT2 and the timing time t2, and takes corresponding processing measures, respectively, thereby implementing the voltage adaptive control of the vehicle-mounted electronic system 100.

In order to further improve the fault tolerance and reliability of the control, in the embodiment of the present invention, the control module 23 is further configured to predict the variation trend of the external input power supply parameter before sending out the adjustment signal.

In some embodiments, the control module 23 is specifically configured to capture a rising edge or a falling edge of the first interrupt port INT1 or the second interrupt port INT2 when predicting the variation trend of the external input power supply parameter, and determine the variation trend of the external input power supply parameter according to the rising edge or the falling edge, for example, determine that the external input power supply parameter is in a rising trend if the rising edge is captured, and determine that the external input power supply parameter is in a falling trend if the falling edge is captured.

Or, the control module 23 acquires an AD value of the analog-to-digital conversion port, and determines a variation trend of the external input power supply parameter according to a variation of the AD value within a preset time. Specifically, an external input voltage is acquired by using the AD1, AD values acquired at different moments are compared, if the AD value is increased all the time, the voltage tends to rise, and if the AD value is decreased all the time, the voltage tends to fall.

When the voltage is slowly increased, the control module 23 judges through INT1, INT2 and AD1, and sequentially realizes functions of initializing a buffer, turning on power supplies of the circuit modules, adaptive learning and the like.

In summary, the vehicle electronic system 100 of the embodiment of the invention combines digital acquisition (INT1, INT2) and analog acquisition (AD1), so that the voltage acquisition is more accurate, comprehensive and reliable. When the external input voltage suddenly changes, the interrupt acquisition of the control module 23 can ensure that the voltage adaptive response speed of the vehicle-mounted electronic system 100 is faster. In the aspect of hardware design, a small amount of electrolytic capacitors are added, in the aspect of software design, a load current strategy is reduced, and the two strategies are combined, so that the stability of each voltage level in the system is flexibly and economically maintained, namely, the voltage level cannot fluctuate along with sudden change of external input voltage, and the normal work of certain circuit modules 11 with high requirements on working voltage precision is ensured. In addition, the vehicle-mounted electronic system 100 of the embodiment of the invention has the outstanding advantages of simple design, good flexibility, low cost and the like, and is convenient for being widely popularized in the industry.

Based on the on-vehicle electronic system of the above embodiment, a vehicle according to an embodiment of the second aspect of the invention is described below with reference to the drawings.

As shown in fig. 6, a vehicle 1000 of an embodiment of the present invention includes an in-vehicle electronic system 100 of an embodiment of the above-described aspect, for example, a combination meter system, a lighting system, and the like. By adopting the vehicle-mounted electronic system 100 of the embodiment of the invention, the input voltage of the circuit module can be adaptively adjusted according to the change of the external input power supply parameter, so that the normal operation of the circuit module is ensured, and the stability and the reliability are improved.

A voltage adaptive control method of an in-vehicle electronic system according to an embodiment of the third aspect of the present invention will be described below with reference to the accompanying drawings.

In an embodiment of the present invention, an in-vehicle electronic system includes an electronic device including at least one circuit module and a power supply device. Fig. 7 is a flowchart of a voltage adaptive control method of an on-vehicle electronic system according to an embodiment of the present invention, and as shown in fig. 7, the voltage adaptive control method of an embodiment of the present invention includes:

and S1, the power supply device collects the external input power supply parameters of the vehicle-mounted electronic system.

In an embodiment, the power supply device comprises a control module, a digital acquisition circuit and an analog acquisition circuit, wherein an input end of the digital acquisition circuit is connected with an external ignition signal processing circuit, a first output end of the digital acquisition circuit is connected with a first interruption port of the control module, a second output end of the digital acquisition circuit is connected with a second interruption port of the control module, an input end of the analog acquisition circuit is connected with a power supply network of the vehicle, and an output end of the analog acquisition circuit is connected with an analog-to-digital conversion port of the control module and used for acquiring a normal electric voltage provided by the power supply network. The ignition signal is acquired by a digital acquisition circuit, and the ordinary voltage provided by the power supply network of the vehicle is acquired by an analog acquisition circuit.

And S2, the power supply device sends out an adjusting signal according to the change of the external input power supply parameter.

And S3, the power supply device adjusts the circuit module of the vehicle-mounted electronic system according to the adjusting signal.

In the embodiment of the invention, when the voltage of the ignition signal and the constant voltage reach a first threshold value, the control module performs cache initialization; or when the voltage of the ignition signal and the constant voltage reach a second threshold value, the control module sends out a starting signal to start the power supply of the circuit module, wherein the second threshold value is larger than the first threshold value; alternatively, the control module issues a decrease signal to decrease the supply current of the circuit module when the voltage of the ignition signal and the constant voltage reach a third threshold, wherein the third threshold is greater than the first threshold and greater than the second threshold.

Further, in an embodiment of the present invention, the control module records a voltage of the ignition signal and a holding time for the constant voltage to reach a third threshold; the control module sends out a closing signal to close the power supply of the circuit module when the maintaining time reaches the preset time, so that the system is prevented from being in a low-voltage state for a long time and being abnormal.

In some embodiments of the present invention, the voltage adaptive control method further comprises: the power supply device pre-judges the variation trend of the external input power supply parameters before sending out the adjusting signal, and can improve the fault tolerance and reliability of control.

In some embodiments of the present invention, predicting a variation trend of the external input voltage specifically includes: the control module captures a rising edge or a falling edge of the first middle fracture or the second middle fracture and judges the change trend of the externally input power supply parameters according to the rising edge or the falling edge; for example, if a rising edge is captured, the externally input power supply parameter is determined to be in a rising trend, whereas if a falling edge is captured, the externally input power supply parameter is determined to be in a falling trend.

Or the control module acquires the AD value of the analog-to-digital conversion port and judges the change trend of the external input power supply parameter according to the change of the AD value within the preset time. Specifically, as shown in fig. 2, an external input voltage is acquired by using the AD1, and the AD values acquired at different times are compared, so that if the AD value is always increased, the voltage tends to increase, and if the AD value is always decreased, the voltage tends to decrease.

When the voltage is slowly increased, the control module judges through INT1, INT2 and AD1, and sequentially achieves the functions of initializing a cache, turning on the power supply of each circuit module, self-adaptive learning and the like.

According to the voltage self-adaptive control method of the vehicle-mounted electronic system, the power supply of the circuit module is self-adaptively controlled according to the change of the external input power supply parameters by acquiring the external input power supply parameters, so that the fluctuation caused by the sudden change of the external input power supply parameters is avoided, and the working stability and reliability of the vehicle-mounted electronic system are improved.

The voltage self-adaptive control method provided by the invention is suitable for most vehicle-mounted electronic systems, and particularly suitable for products with strict requirements on test items such as instantaneous voltage drop, collision voltage drop, starting voltage disturbance, slow voltage drop and slow voltage rise, anti-interference of electric fast transient pulse groups, anti-interference of surge impact and the like. The voltage adaptation of the onboard electronic system is described below by taking a 12.3-inch full-liquid-crystal instrument system of the vehicle as an example.

In some embodiments, the preprocessing circuit of the 12.3-inch full liquid crystal instrument system of the vehicle is shown in fig. 5, G1 is a gas discharge tube, and the surge impact resistance of the gas discharge tube completely meets the requirements of IEC 61000-4-5-2014. The ceramic capacitors C1 and C2 are connected in series and then are integrally combined into a trunk circuit, and the effect is more obvious when the capacitance value is selected to be between 100pF and 22 nF. The resistors R1 and R2 are used as the discharge circuit of the main circuit, and the resistance value cannot be too large, and certainly, considering the power consumption of the product, cannot be too small, and is generally between 100k Ω to 200k Ω. The D1 is Schottky diode for preventing the reverse connection of power supply from damaging the product. The TVS tube D2 has high response speed, and can effectively restrain high-amplitude low-energy interference signals such as electric fast transient pulse groups. Electrolytic capacitors C3, C5 and C7 are used for storing energy, and the voltage stability of the main loop is improved. The ceramic capacitors C4, C6 and C8 are used for filtering, and voltage ripples of the main loop are reduced. In practical application, the instrument system comprises a large number of analog acquisition circuits for acquiring and diagnosing dozens of external input signals, and in consideration of the sensitivity of the analog circuits, the common-mode inductor LCM1 is added for isolating the ground, so that the anti-interference capability of the instrument is improved. In addition, the power inductor L1, the ferrite bead FB1 and the capacitor form a filter circuit, and the electromagnetic compatibility of the instrument is further improved.

A power supply topology structure of a 12.3 inch full-liquid crystal instrument system is shown in fig. 8, wherein in the embodiment, a Boost type DC/DC circuit is adopted as the Boost circuit, a Buck type DC/DC circuit is adopted as the Buck circuit, and specifically, the Buck type DC/DC circuit is a Buck type DC-to-DC switching power supply, is suitable for an input voltage larger than an output voltage, and has the advantages of high conversion efficiency, capability of outputting a large current and small static current; the Boost type DC/DC circuit is a Boost type direct current-to-direct current switching power supply, generally has two working modes of constant current and constant voltage, and can output larger current. PWM is pulse width modulation, and a driving mode for controlling an analog circuit by using a digital signal of an MCU module is simple to control, good in flexibility and good in dynamic response. LDO (low dropout regulator) is a low dropout regulator, which is used as a voltage reduction module and has the advantages of high output voltage precision, low cost, small static current and the like. DDR3 is a high speed SDRAM, typically operating at 1.35V or 1.5V. The emmc (embedded Multi Media card) is a standard specification of an embedded memory with a controller, and the operating voltage thereof is generally 1.8V or 3.3V.

In an embodiment, the circuit module 11 includes a sound module, a display module, an analog circuit, and a driving module for a backlight of a liquid crystal display. The sound module drives the loudspeaker by a special voice chip, and a control module, such as a serial port of an MCU module in the figure, controls the voice chip to call and play a solidified sound source from an external flash chip, so that the alarm function of the instrument is realized, and the normal working current of the sound module is about 250 mA. The liquid crystal display backlight is powered by the boost DC/DC circuit, the MCU drives the DC/DC circuit to supply power through a pulse width modulation (PWM for short) signal with certain frequency, the MCU adjusts the duty ratio of the PWM to change the brightness of the liquid crystal display, and the working current of a driving module of the liquid crystal display backlight is about 360 mA.

The voltage adaptive control strategy of the 12.3-inch full-liquid crystal instrument system is explained in detail below.

In the embodiment of the invention, the nominal voltage of the meter shown in fig. 8 is 12V, and the full function is required to be realized in the voltage range of 9V-16V. In the voltage instant drop test, the input voltage is instantly dropped to 4.5V from 9V and is maintained for 100ms, the liquid crystal screen of the instrument is required not to be damaged but to be restarted, and the sound of the loudspeaker is not abnormal but the sound volume is slightly reduced. During a collision voltage drop test, the input voltage drops to 3.6V, the time is maintained for 2ms, the voltage rises to 4.7V again, the time is maintained for 8ms, the display of an instrument liquid crystal screen is required to be normal, and the sound of a loudspeaker is not abnormal. When a voltage disturbance test is started, the lowest voltage is 6V, the display of an instrument liquid crystal screen is required to be normal, and the sound of a loudspeaker is not abnormal. During the voltage slow-decreasing and slow-increasing test, the input voltage is firstly slowly decreased from 9V to 0V at a speed of about 0.5V/min, then slowly increased from 0V to 9V at the same speed, and the instrument is required to be increased to 9V to realize all functions, including self-learning function.

The voltage adaptive control process of the 12.3-inch full liquid crystal instrument system mentioned in the above embodiment is shown in fig. 9: the method specifically comprises the following steps:

s900, INT1, INT2, AD1 collect the constant voltage and IG1 electricity.

S910, the variation trend of the external input voltage is judged in advance.

S920, judging whether the external input voltage is in the ascending trend, if so, going to step S930, otherwise, going to step S970.

S930, judging whether the external input voltage rises to U1, if so, entering the step S940, otherwise, returning to the step S900.

And S940, the ignition signal is valid, and the MCU cache is initialized.

Specifically, as shown IN fig. 8, when the voltage of the constant voltage VBAT and the voltage of the VIG1 of the IG1 rises to U1, the input terminal IN1 of the level acquisition chip rises to the chip transition threshold, the output terminal OUT1 starts to make a transition, the MCU interrupt port INT1 connected to the level acquisition chip jumps to "0", and the system determines that the ignition signal is valid, and starts to initialize the MCU buffer. At this time, the reference power supply AVRH of the analog acquisition circuit starts to stabilize at 5V.

And S950, judging whether the external input voltage rises to U2, if so, entering the step S960, otherwise, returning to the step S900.

S960, the power supply of the display module is turned on, the backlight of the liquid crystal display is turned on, and the self-learning function is executed.

Specifically, as shown in fig. 8, when the voltage of the VIG1 of the constant voltages VBAT and IG1 rises to U2, the level acquisition chip OUT2 jumps, i.e., the INT2 jumps to "0", and at this time, the analog acquisition circuit AD1 reaches the set threshold range, and the level of the INT2 of the interrupt port and the value of the AD1 are and-operated. The system sequentially turns on a display module power supply through a GPIO port of the MCU and drives the liquid crystal display backlight through a PWM port. The voltage at the moment CAN ensure that the MCU and the CAN transceiver work normally, and functions of a parking system fault indicator lamp, a headlamp fault indicator lamp and the like start self-learning. The display module comprises high-speed chips such as an instrument main control CPU (kernel working voltage is 1.2V and is communicated with the MCU through an IIC bus), DDR3 (working voltage is 1.35V and is mainly used for storing and operating a memory), eMMC (working voltage is 3.3V and is mainly used for storing information such as an operating system, an application program, an instrument theme and the like), and strict requirements are imposed on voltage ripples and power-on time sequence. The backlight power supply of the liquid crystal display is 27V, the PWM driving frequency is 26kHz, and the backlight brightness is adjusted through the duty ratio.

And S970, judging whether the external input voltage is in a descending trend, if so, entering the step S980, otherwise, returning to the step S900.

And S980, judging whether the external input voltage is reduced to U3, if so, entering the step S990, otherwise, returning to the step S900.

And S990, adjusting the backlight of the liquid crystal display to be darkest, timing t1 and counting n times.

Specifically, when the voltages of the constant voltage VBAT and the voltage VIG1 of the IG1 are reduced to U3, the corresponding MCU interrupt port INT2 jumps to "1", and the analog acquisition circuit AD1 reaches a set threshold range, at this time, the software immediately reduces the PWM duty ratio through a specific algorithm, so that the backlight brightness of the lcd screen is adjusted to the darkest and maintained for t1 time, and the user cannot feel the flicker of the lcd screen due to the visual residual effect.

And S1000, judging whether the counting reaches n times, if so, entering the step S1001, and otherwise, returning to the step S900.

And S1001, closing the backlight of the liquid crystal display, closing the power supply of the display module and starting a low-voltage protection control strategy.

Specifically, when the INT2 of the MCU interrupt port jumps to "1" and the AD1 reaches a set threshold range, timing is started, and the time exceeds t2, the MCU determines that the external voltage is low for a long time, immediately starts a low voltage protection strategy, and sequentially turns off the backlight of the lcd and the power supplies of all circuit modules, thereby preventing the system from abnormal conditions due to a long-time low voltage condition. The time t2 can be determined by counting n times by the MCU timer (t 2n t1), and the fault tolerance of the system and the effectiveness of the low voltage protection need to be considered, which cannot be too short, otherwise the false triggering is easy, which cannot be too long, otherwise the instrument display is abnormal.

It should be particularly noted that, in this embodiment, when the external input voltage is below 6V for a long time, the minimum value of the operating voltage of the DC/DC chip is reached, the power supply of the CPU core and the DDR3 spikes, and the instrument may be scratched or white (generally, power can be restored after power is cut off again), or even permanently damaged.

In the embodiment, the level acquisition chip adopted is MCF4206 with six channels, and the ESD protection is up to 4000V. Preferably, TPS54260Q1 of TI company is adopted for Buck type DC/DC, and the working voltage range is 3.5V-60V. Preferably, D4020 is used for Boost type DC/DC, and the operating voltage range is 2.8V-60V.

The vehicle-mounted electronic system and the voltage self-adaptive control method thereof of the embodiment of the invention creatively, locally and reliably realize the voltage self-adaptive control of the vehicle-mounted electronic system at low cost, adopt a highly integrated level acquisition chip to accurately and comprehensively acquire the external input voltage of the vehicle-mounted electronic system in real time, intelligently distinguish the instantaneous low voltage and the long-term low voltage of the external input voltage according to the state of a middle fracture and time delay by a control module, and automatically adjust the size of the internal load of the system and the voltage distribution by software through a specific algorithm. The device has the outstanding advantages of simple design, good flexibility, low cost and the like, and is worthy of being widely popularized in the industry.

It should be noted that in the description of this specification, any process or method description in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and that the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. An in-vehicle electronic system characterized by comprising:

an electronic device comprising at least one circuit module;

a power supply device, the power supply device comprising:

the acquisition module is used for acquiring external input power supply parameters;

the control module is used for sending out an adjusting signal according to the change of the external input power supply parameters, wherein the external input power supply parameters comprise the voltage of an ignition signal and the constant electric voltage provided by a power supply network of the vehicle;

the adjusting module is connected with the circuit module and used for adjusting the input voltage of the circuit module according to the adjusting signal;

the control module is specifically used for carrying out cache initialization when the voltage of the ignition signal and the constant voltage reach a first threshold value when sending out an adjusting signal according to the change of the external input power supply parameter; when the voltage of the ignition signal and the constant voltage reach a second threshold value, sending a starting signal to the regulating module to start the power supply of the circuit module, wherein the second threshold value is greater than the first threshold value; sending a reduction signal to the adjustment module to reduce the supply current of the circuit module when the voltage of the ignition signal and the constant voltage are reduced to a third threshold value, wherein the third threshold value is greater than the first threshold value and less than the second threshold value.

2. The in-vehicle electronic system of claim 1, wherein the acquisition module comprises:

the input end of the digital acquisition circuit is connected with the external ignition signal processing circuit, the first output end of the digital acquisition circuit is connected with the first interrupt port of the control module, the second output end of the digital acquisition circuit is connected with the second interrupt port of the control module, and the digital acquisition circuit is used for acquiring ignition signals;

and the input end of the analog acquisition circuit is connected with a power supply network of a vehicle, and the output end of the analog acquisition circuit is connected with an analog-to-digital conversion port of the control module and is used for acquiring the constant voltage provided by the power supply network.

3. The in-vehicle electronic system of claim 2, wherein the external ignition signal processing circuit comprises:

and a first end of the control switch is connected with the power supply network, a second end of the control switch is connected with the digital acquisition circuit, and a third end of the control switch is connected with the vehicle body controller of the vehicle.

4. An in-vehicle electronic system according to claim 2, wherein said power supply device further comprises:

the input end of the preprocessing module is connected with the power supply network, the output end of the preprocessing module is respectively connected with the input ends of the regulating module and the analog acquisition circuit, and the preprocessing module preprocesses externally input power supply parameters.

5. The in-vehicle electronic system of claim 4, wherein the preprocessing module comprises:

the energy storage circuit is used for providing supplementary current for the circuit module when the external input power supply parameter drops;

the system comprises an electric fast transient pulse group anti-jamming circuit and a surge impact anti-jamming circuit, wherein the electric fast transient pulse group anti-jamming circuit, the surge impact anti-jamming circuit and the energy storage circuit are respectively connected in parallel;

and the electromagnetic compatible circuit is connected with the electric fast transient pulse group anti-jamming circuit, the surge impact anti-jamming circuit and the energy storage circuit in parallel respectively.

6. The in-vehicle electronic system of claim 5, wherein the regulation module comprises a buck circuit, or a boost circuit, or a combination of a buck circuit and a boost circuit.

7. The vehicle electronic system according to claim 6, wherein the regulating module comprises a first buck circuit and a first boost circuit, an input end of the first buck circuit is connected to an output end of the preprocessing module, an output end of the first buck circuit is connected to an input end of the first boost circuit, a control end of the first buck circuit is connected to a first IO port of the control module, an output end of the first boost circuit is connected to an input end of the first circuit module, and a control end of the first boost circuit is connected to a second IO port of the control module;

or, the adjusting module includes a second voltage-reducing circuit and a third voltage-reducing circuit, an input end of the second voltage-reducing circuit is connected with an output end of the preprocessing module, an output end of the second voltage-reducing circuit is connected with a digital power supply end of the control module, an input end of the third voltage-reducing circuit is connected with an output end of the preprocessing module, an output end of the third voltage-reducing circuit is connected with the analog circuit module, and a control end of the third voltage-reducing circuit is connected with an analog circuit pull-up power supply end of the control module;

or the adjusting module comprises a fourth voltage-reducing circuit, an input end of the fourth voltage-reducing circuit is connected with an output end of the preprocessing module, an output end of the fourth voltage-reducing circuit is connected with the second circuit module, and a control end of the fourth voltage-reducing circuit is connected with a third IO port of the control module;

or, the adjusting module comprises a second boosting circuit, an input end of the second boosting circuit is connected with an output end of the preprocessing module, an output end of the second boosting circuit is connected with a third circuit module, and a control end of the second boosting circuit is connected with a PWM (pulse-width modulation) port of the control module.

8. The vehicle electronic system of claim 1, wherein the control module is further configured to record a voltage of the ignition signal and a duration of time for the constant voltage to reach the third threshold, and to send a shutdown signal to the adjustment module to shut down the power supply of the circuit module when the duration of time reaches a preset time.

9. The vehicle electronic system according to claim 7, wherein the control module is further configured to predict a trend of the externally input power supply parameter before sending the adjustment signal, specifically, capture a rising edge or a falling edge of the first middle fracture or the second middle fracture, and determine the trend of the externally input power supply parameter according to the rising edge or the falling edge; or, the AD value of the analog-to-digital conversion port is collected, and the change trend of the external input power supply parameter is judged according to the change of the AD value within the preset time.

10. A vehicle, characterized in that it comprises an on-board electronic system according to any of claims 1-9.

11. A voltage adaptive control method of a vehicle-mounted electronic system, the vehicle-mounted electronic system including an electronic apparatus and a power supply apparatus, the electronic apparatus including at least one circuit module, the voltage adaptive control method comprising:

the power supply device collects external input power supply parameters of the vehicle-mounted electronic system;

the power supply device sends out an adjusting signal according to the change of the external input power supply parameters, wherein the external input power supply parameters comprise the voltage of an ignition signal and the constant electric voltage provided by a power supply network of the vehicle;

the power supply device regulates the input voltage of a circuit module of the vehicle-mounted electronic system according to the regulating signal;

the power supply device sends out an adjusting signal according to the change of the external input power supply parameter, and the method specifically comprises the following steps:

when the voltage of the ignition signal and the constant voltage reach a first threshold value, a control module carries out cache initialization;

when the voltage of the ignition signal and the constant voltage reach a second threshold value, the control module sends out a starting signal to start the power supply of the circuit module, wherein the second threshold value is larger than the first threshold value;

the control module issues a decrease signal to decrease a supply current of the circuit module when the voltage of the ignition signal and the constant voltage decrease to a third threshold, wherein the third threshold is greater than the first threshold and less than the second threshold.

12. The method as claimed in claim 11, wherein the power supply device comprises a control module, a digital acquisition circuit and an analog acquisition circuit, an input of the digital acquisition circuit is connected to the external ignition signal processing circuit, a first output of the digital acquisition circuit is connected to the first interrupt port of the control module, a second output of the digital acquisition circuit is connected to the second interrupt port of the control module, an input of the analog acquisition circuit is connected to a power supply network of the vehicle, an output of the analog acquisition circuit is connected to the analog-to-digital conversion port of the control module for acquiring the constant voltage provided by the power supply network, and the power supply device acquires the external input power supply parameters of the vehicle-mounted electronic system specifically comprises:

the ignition signal is acquired through the digital acquisition circuit, and the normal electric voltage provided by the power supply network of the vehicle is acquired through the analog acquisition circuit.

13. The adaptive control method of voltage for an in-vehicle electronic system of claim 11, wherein the adaptive control method of voltage further comprises:

the control module records the voltage of the ignition signal and the maintaining time for the constant voltage to reach the third threshold value;

and the control module sends out a closing signal to close the power supply of the circuit module when the maintaining time reaches the preset time.

14. The adaptive control method of voltage for an in-vehicle electronic system of claim 12, wherein the adaptive control method of voltage further comprises:

the power supply device pre-judges the variation trend of the external input power supply parameters before sending out the adjusting signal;

the pre-judging of the variation trend of the external input power supply parameters specifically comprises:

the control module captures a rising edge or a falling edge of the first middle fracture or the second middle fracture, and the change trend of the external input power supply parameter is judged according to the rising edge or the falling edge;

or the control module acquires the AD value of the analog-to-digital conversion port and judges the change trend of the external input power supply parameter according to the change of the AD value within the preset time.

15. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, implements the voltage adaptive control method of the in-vehicle electronic system according to any one of claims 11 to 14.