CN211280643U - Standby display system for vehicle instrument - Google Patents
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Abstract
The utility model provides a backup display system of automobile-used instrument, include: the digital instrument display screen, the display signal change-over switch, the first device and the second device, wherein the display signal change-over switch is respectively connected with the first device, the second device and the digital instrument display screen; the first device is defined as a device commonly used by the system; the second device is configured to output a signal to the display screen of the digital instrument for displaying when the first device fails and cannot normally operate; the second device acts as a backup system for the first device, the second device being identical to or capable of performing the primary function of the first device. The utility model discloses a two device's demonstration, a normal demonstration, another carries out reserve, carries out motormeter display system's reliability, in addition, on instrument display picture to developments and static state show, promote user experience.
Description
Technical Field
The utility model relates to an automotive filed especially relates to a reserve display system of automobile-used digital instrument.
Background
Along with the popularization of automobiles, more and more automobiles enter thousands of households, the consumption level of people is continuously improved, the number of automobiles is continuously increased, the intelligentization requirement of people on electric appliances in the automobiles is higher and higher, the design of users on the automobiles is higher and higher, great research and development investments are made by various manufacturers and tie1 suppliers of the automobiles to improve the user experience while the automobiles are intelligentized, particularly, the digital instruments are adopted to replace the traditional mechanical instruments in the aspect of instrument display of the automobiles at present, the complexity of the digital instruments in the aspects of electronics and software is higher, the probability of problems is increased, the instruments are taken as equipment with higher safety level requirement in a vehicle-mounted system, and the reliability of the digital instruments needs to be considered. The existing vehicle-mounted digital instrument is basically a single system, reliability is improved by continuously optimizing the stability of the single system, but along with the increasing integration level and complexity of the digital instrument, the difficulty and cost for optimizing the stability of the single system are increased, and the bottleneck for improving the reliability of the digital instrument by means of the method is reached.
In the prior art, the reliability of a vehicle-mounted digital instrument is improved by means of optimizing the stability of a single system, the bottleneck is reached, at present, more and more reports are frequently generated when the instrument of an automobile crashes suddenly in the driving process, the phenomenon that the instrument of the automobile crashes suddenly in the driving process is often complained by automobile users on a vehicle mass network, for example, in 1 month and 23 days in 2014, the users complain that the instrument of a popular fast-running automobile is totally black suddenly in the driving process, and if the automobile is not handled timely by the owner, serious traffic accidents are caused by the difference. Therefore, under the condition that the huge control system of the automobile is increasingly huge, the measures for solving the problem of faults in the driving process by optimizing the instrument control display system cannot meet the requirements of users, and therefore, a new solution is needed to be provided for solving the problem that the instrument suddenly crashes in the driving process.
Besides the problem that the normal running of the vehicle cannot be maintained due to sudden failure and crash of the instrument in the running process, a plurality of unsanitary places exist in the aspect of instrument display, such as: the current instrument display interfaces are fixed, but the number of images of automobile sensors to be displayed is large, such as oil temperature, oil quantity, oil consumption, automobile lamps, tire pressure, tail doors, automobile windows, seat belts and the like, but the images are very limited, the image display is often fixed when manufacturers leave factories, and other information after a user wants to see the fixed images can only be observed by manually moving the images, which is very unimaginable. Although the user does not need to see daily maintenance information, tire pressure information and the like, the user also needs to pay attention to the information, if the information is not displayed for a long time, problems are highlighted, for example, reminding of insufficient tire pressure or overdue maintenance is achieved, the user often cannot go to a repair shop for treatment due to lack of events, and bad experience is brought to the user.
SUMMERY OF THE UTILITY MODEL
Based on the defect that exists among the prior art, the utility model provides a reserve display system of automobile-used instrument, include: the digital instrument display screen, the display signal change-over switch, the first device and the second device, wherein the display signal change-over switch is respectively connected with the first device, the second device and the digital instrument display screen;
the first device is configured to output signals to a display screen of the digital instrument for display, and the first device is defined as a system common device; the second device is configured to output a signal to the display screen of the digital instrument for displaying when the first device fails and cannot normally operate;
and the digital instrument display screen is configured to display a picture formed by a signal preset in the vehicle.
A vehicle instrument standby display system further comprises a plurality of ECUs arranged in a vehicle, wherein the ECUs in the vehicle are respectively connected with a first device and a second device, and the connection interface types comprise UART (universal asynchronous receiver/transmitter), SPI (serial peripheral interface), I2C, GPIO (general purpose input/output) and a vehicle-mounted Ethernet interface;
the first device is connected with the second device, the first device periodically sends heartbeat signals or data to the second device, and the second device monitors the heartbeat signals sent by the first device;
when the first device operates normally, the second device operates in a background state, and signals of the second device are not output to the display screen of the digital instrument.
The second device is used as a standby system of the first device, is the same as the first device or can realize the main function of the first device, and the main function is the function meeting the preset instrument display requirement.
A standby display system of a vehicle instrument further comprises a display signal switch, a display signal switch and a display signal control switch, wherein the display signal switch is configured to be used for controlling the output signals of a first device and a second device to be switched, and when the first device operates normally, the output signal of the second device is blocked from being transmitted to a digital instrument display screen, and only the signal of the first device is allowed to be transmitted to the digital instrument display screen; when the first device can not normally operate, the display signal change-over switch thereof blocks the signal of the first device from being output to the digital instrument display screen and only allows the signal of the second device to be transmitted to the digital instrument display screen.
A standby display system for vehicle instruments is characterized in that a display signal change-over switch comprises a physical circuit switch, a semiconductor switch or a digital switch realized by FPGA, and the display signal change-over switch is controlled by a first device or a second device or both the first device and the second device.
A standby display system for a vehicle instrument is further provided, wherein the first device comprises an automatic test function module, a first storage module and a system backup module;
the automatic test function module is configured to automatically test preset functions after the system is restarted due to faults;
a first storage module configured to store ECU signal data from an in-vehicle network;
and the system backup module is configured to periodically backup the operating system of the first device, and after the first device is restarted after a fault occurs, if the automatic test function module fails to test the system, the system is started to restore.
A standby display system for vehicle instruments is further provided, wherein a first storage module comprises a main function data storage module, an auxiliary function data storage module and a system backup data storage module, the main function data storage module is used for storing main function data, and a first device can periodically synchronize the main function data to a second device;
the system backup data stores data of an initial system and a latest backup system built in the first device, and when a system backup module needs to backup or restore the system, the data in the system backup data storage module needs to be called.
A standby display system for a vehicle instrument is further provided, wherein the second device comprises a second storage module, a second monitoring module and a restarting module;
a second storage module configured to store data transmitted from the first apparatus;
the second monitoring module is configured to monitor the heartbeat signal sent by the first device;
the restarting module is configured to restart the first device after the first device fails and no heartbeat signal is received or a received heartbeat signal is wrong within a preset threshold range.
The standby display system for the vehicle instrument further comprises a first device which immediately sends a heartbeat signal to a second device after the first device is restarted to normally operate, the second device immediately controls a switch signal switching device to switch on the first device and interrupt the second device after monitoring a normal heartbeat signal through a second monitoring module, and then a digital instrument display screen normally displays an output signal of the first device.
A standby display system for vehicle instruments is characterized in that the display content of a digital instrument display screen comprises a fixed display picture and a dynamic display picture, the fixed display picture displays key sensor information in a vehicle, the dynamic display picture displays common sensor information, the dynamic picture comprises a plurality of different sensor pictures, and the sensor pictures are displayed according to a preset display sequence, display time and display frequency;
the key sensor information includes speed, mileage, engine speed, oil temperature, shift signals.
The information of the common sensors comprises tire pressure display, vehicle window opening and closing state display, tail door display, air conditioner pictures, vehicle lamps and wipers.
A standby display system for vehicle instruments further comprises a test display screen and test monitoring equipment, wherein the test display screen and the test monitoring equipment are respectively connected with a first device;
the test display screen is used for restarting the output signal for displaying the first device after the first device fails, and the test monitoring equipment is used for monitoring the output signal of the first device to the test display screen when the automatic test function module performs function test on the restarted system.
The beneficial technical effects are as follows:
1) the utility model provides a scheme of backup system for improve digital instrument's reliability. And starting the common system under normal conditions, driving the digital instrument to display, monitoring the state of the common system in real time by the backup system at the moment, immediately switching to the backup system to drive the digital instrument to display once abnormality is found, and continuously monitoring the state of the common system, and switching back to the display of the common system or the interaction role of the common system and the backup system after the common system is normal. Because the probability of the problem occurring in the two systems is far lower than that in the single system, the reliability of the digital instrument can be greatly improved.
2) In addition, the backup mode has more advantages in the recovery process when an abnormality occurs, compared with a single system. When the single system is abnormal, the problem can be solved only by a restarting mode, the restarting process is generally long, even if the single system can be recovered after restarting, blank interruption on the display of the instrument in the period of time can be caused, and great hidden danger is brought to driving safety; if the system is not able to recover after a reboot, the system is essentially down. In the backup mode, if the common system is abnormal, the backup system can be switched to display immediately at the moment, the common system can be restarted at the background, the instrument display cannot be interrupted at the moment, even if the common system cannot be recovered after being restarted, the backup system can always display, and the system cannot be paralyzed.
Drawings
The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.
Fig. 1 is a schematic frame diagram of a standby display system of a vehicle instrument according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a detailed structure of a standby display system of a vehicle instrument according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first memory module according to an embodiment of the present invention;
fig. 4 is a flowchart of a standby display control method for a vehicle instrument according to an embodiment of the present invention.
Detailed Description
In order to more clearly understand the technical features, objects, and effects herein, embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like parts throughout. For the sake of simplicity, the drawings schematically show the relevant parts of the invention, and do not represent the actual structure of the product. In addition, for simplicity and clarity of understanding, only one of the components having the same structure or function is schematically illustrated or labeled in some of the drawings.
As for the control system, the functional module, application program (APP), is well known to those skilled in the art, and may take any suitable form, either hardware or software, and may be a plurality of functional modules arranged discretely, or a plurality of functional units integrated into one piece of hardware. In its simplest form, the control system may be a controller, such as a combinational logic controller, a micro-programmed controller, or the like, so long as the operations described herein are enabled. Of course, the control system may also be integrated as a different module into one physical device without departing from the basic principle and scope of the present invention.
The utility model discloses in "connect", can include direct connection, also can include indirect connection, communication connection, electricity and connect except that the particular description.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, values, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, values, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items
It should be understood that the term "vehicle" or "vehicular" or other similar terms as used herein generally includes motor vehicles such as passenger automobiles including Sport Utility Vehicles (SUVs), buses, trucks, various commercial vehicles, watercraft including a variety of boats, ships, aircraft, and the like, and includes hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles, and other alternative fuel vehicles (e.g., fuels derived from non-petroleum sources). As referred to herein, a hybrid vehicle is a vehicle having two or more power sources, such as both gasoline-powered and electric-powered vehicles.
Further, the controller of the present disclosure may be embodied as a non-transitory computer readable medium on a computer readable medium containing executable program instructions executed by a processor, controller, or the like. Examples of computer readable media include, but are not limited to, ROM, RAM, Compact Disc (CD) -ROM, magnetic tape, floppy disk, flash drive, smart card, and optical data storage device. The computer readable recording medium CAN also be distributed over network coupled computer systems so that the computer readable medium is stored and executed in a distributed fashion, such as by a telematics server or Controller Area Network (CAN).
Example 1:
the embodiment provides a vehicle instrument backup display system, referring to fig. 1 and fig. 2, comprising a digital instrument display screen, a display signal switch, a first device, a second device and an ECU, wherein the display signal switch is respectively connected with the first device, the second device and the digital instrument display screen, the first device is connected with the second device, a plurality of ECUs in a vehicle are respectively connected with the first device and the second device, and the connection interface types comprise UART, SPI, I2C, GPIO and vehicle-mounted ethernet interfaces;
the digital instrument display screen is configured to display a picture formed by preset signals in the vehicle, specifically, such as oil consumption, speed, oil temperature, tire pressure, vehicle lamp signals, brake signals and various fault signals;
the first device is configured to output signals to the display screen of the digital instrument for displaying, the first device is defined as a device commonly used by the system, and when no fault occurs in the first device, the signals output by the display screen of the digital instrument come from the first device;
the second device is configured to output a signal to the display screen of the digital instrument for displaying when the first device fails and cannot normally operate;
specifically, if the second device confirms that the first system cannot normally operate when the first device fails and cannot normally operate, the second device outputs a signal to a display screen of the digital instrument in time for displaying;
when the first device operates normally, the second device operates in a background, and signals of the second device are not output to a display screen of the digital instrument;
the method comprises the steps that a first device sends heartbeat signals to a second device periodically, and the second device keeps monitoring the heartbeat signals sent by the first device;
the second device is used as a standby system of the first device, the second device can be the same as the first device or the second device can realize the main function of the first device, and the main function is defined as the function meeting the preset instrument display requirement;
the display signal switching switch is configured to be used for controlling the output signals of the first device and the second device to be switched, and when the first device operates normally, the output signal of the second device is blocked to the digital instrument display screen, and only the signal of the first device is allowed to be transmitted to the digital instrument display screen; when the first device can not normally operate, the display signal change-over switch thereof blocks the signal of the first device from being output to the digital instrument display screen and only allows the signal of the second device to be transmitted to the digital instrument display screen;
the display signal change-over switch comprises a physical circuit switch, a semiconductor switch or a digital switch realized by FPGA, and can be controlled by the first device or the second device or both the first device and the second device;
the first device comprises an automatic test function module, a first storage module and a system backup module,
the automatic test function module is configured to automatically test preset functions after the system is restarted due to faults, the preset functions are related to driving safety and can maintain functions of normal vehicle running, such as function display of brake related signals, engine related signals, speed, oil temperature, oil quantity, tire pressure and the like;
the automatic test function module comprises a built-in test program, and when the automatic test function module is triggered by a condition, the built-in test program can be called to test a preset function;
a first storage module configured for storing ECU signal data from an in-vehicle network, in particular, storage of signals such as from a brake, an engine, a vehicle tire pressure, a door, a lamp, whether a seat belt is worn, and the like;
the system backup module is configured to periodically backup an operating system of the first device, and when the first device is restarted due to a fault and if the automatic test function module fails to operate the system, the system is started to restore;
the first storage module comprises main function data storage, auxiliary function data storage and system backup data storage, the main function data storage module is used for storing main function data, and the first device can periodically synchronize the main function data to the second storage module;
the system backup data stores data of an initial system and a latest backup system built in the first device, and when a system backup module needs to backup or restore the system, the data in the system backup data storage module needs to be called;
the vehicle instrument backup system also comprises a test display screen and test monitoring equipment, wherein the test display screen is used for restarting and displaying an output signal of the first device after the first device fails, the test monitoring equipment is used for monitoring the output signal of the first device when the automatic test function module performs function test on the restarted system, the test display screen and the test monitoring module are installed in a vehicle and shielded by devices in the vehicle, the shielding objects are used for shielding for beautifulness and not interfering users, the users can not observe the test display screen and the test monitoring module under the general condition, and the test monitoring module comprises a camera;
the second device comprises a second storage module, a second monitoring module and a restarting module,
a second storage module configured to store the signal data from the first storage module;
specifically, a first storage module in the first device periodically sends received signal data to a second device, the second device stores the data in a second storage module, and when the first device breaks down, the second device can immediately output the data in the second storage module to a digital instrument display screen for displaying, so that seamless connection of the data is guaranteed, and the influence of a driver is minimized.
The second monitoring module is configured to monitor the heartbeat signal sent by the first device;
the restarting module is configured to restart the first device after the first device fails and no heartbeat signal is received or a received heartbeat signal is wrong within a preset threshold range;
specifically, when a first device fails and crashes, if the first device is only in a general functional fault, the first device can be restarted by itself, if the first device cannot be restarted by itself when a serious fault occurs, at the moment, the first device is restarted through a restarting module in a second device, if a heartbeat signal or a heartbeat signal error is not received within a preset range of 1-2 min, the first device is considered to lose the restarting function, at the moment, a power supply switch (not shown in the figure) connected with the first device is controlled through the restarting module, the power supply switch is connected after being physically disconnected, and the first device is forcibly restarted;
when the first device restarts normal operation, the first device immediately sends a heartbeat signal to the second device, the second device immediately controls the switch signal switching device to switch on the first device and interrupt the second device after monitoring a normal heartbeat signal through the second monitoring module, and then the digital instrument display screen normally displays an output signal of the first device.
In a digital instrument display screen interface, because the screen needs to display more contents and the area of the screen is limited, in the prior art, the screen is usually a fixed display interface, and if the display interface with other functions needs to be checked, an instrument display button needs to be manually adjusted, which is very inconvenient, and some key information is easy to miss.
In the instrument display system provided by the implementation, the display content of the digital instrument display screen comprises a fixed display picture and a dynamic display picture, the fixed display picture displays key sensor information in a vehicle, the dynamic display picture displays common sensor information, and the dynamic display picture comprises a plurality of different sensor pictures and displays the sensor pictures according to a preset display sequence, display time and display frequency;
the key sensor information comprises speed, mileage, engine speed, oil temperature, gear shifting signals and the like;
the information of the common sensors comprises tire pressure display, vehicle window opening and closing state display, tail door display, air conditioner pictures, vehicle lamps, windshield wipers and the like;
displaying the common sensor information according to a preset picture sequence, and simultaneously carrying out priority sequencing on the common sensor information, wherein the display frequency and the retention time with high priority are greater than those with low priority, when a fault occurs, the fault picture interrupts the current normally displayed picture to display, and when a plurality of faults occur, the faulted picture information is dynamically displayed without displaying the non-faulted dynamic picture;
the display screen of the digital instrument comprises the display of oil consumption and residual driving mileage, wherein the oil consumption is defined as the volume of fuel oil consumed by the automobile when the automobile drives for 100km, and the residual driving mileage is defined as the mileage which can be driven by the fuel oil stored in an automobile oil tank;
the automobile oil consumption theta is defined as the oil consumption of an automobile in a preset time after the automobile is started, divided by the traveled mileage and multiplied by 100, and the quantity of fuel oil consumed when the automobile travels 100 km;
Δ B represents the amount of fuel consumed, Δ S is the distance traveled by the fuel consumed Δ B; the unit of θ is L/100 km.
Suppose B represents the capacity of the oil tank, S represents the driving mileage and theta represents the oil consumption of the automobile;
the oil consumption comprises initial oil consumption and instantaneous oil consumption which are displayed immediately after the automobile is started, and the instantaneous oil consumption is the oil consumption which is displayed in each preset time period after the automobile is started. If the preset period is T, the instantaneous oil consumption is updated once in each period T.
The display content in the digital instrument display screen comprises the display of the remaining driving mileage, and the display of the remaining driving mileage comprises the display of the initial remaining driving mileage and the instantaneously displayed remaining driving mileage immediately after the automobile is started;
and the instantaneously displayed remaining driving mileage is the remaining driving mileage displayed within each preset time period after the automobile is started. And if the preset period is T, updating the remaining driving mileage once every period T.
After the automobile is ignited and started, the display screen of the digital instrument displays the oil consumption to be displayed and the mileage of the remaining fuel oil capable of running, and the calculation formula of the initial oil consumption display is as follows:
wherein, each time the automobile is started once, after the automobile is started twice, j is 2, and the automobile is started n times, j is n, and Sj represents the distance traveled by the automobile after j starting, and the Bj tableIndicating the remaining fuel quantity theta after Sj mileage of the automobile after the jth startjRepresenting the fuel consumption of the automobile after the jth start;
specifically, it should be noted that when a newly purchased automobile is started for the first time, since there is no historical data value and the displayed data value is the value initially given by the manufacturer, the present implementation provides a method, which starts from the second start, so that j ≧ 2.
The initial display of the mileage that can be driven by the residual fuel after the ignition start of the automobile comprehensively considers the previous fuel consumption index of the vehicle,
after the automobile is started for the jth time, the method for calculating the remaining fuel oil driving mileage comprises the following steps:
defining that the fuel consumption of the automobile can be driven after j is 2 after the automobile is started twice, wherein j is n, and Smj represents the distance that the automobile can be driven after the automobile is started for the j th time, Si represents the distance that the automobile can be driven after the automobile is started for the i th time, and Bj represents the fuel consumption left after the automobile is driven for the Sj mileage after the automobile is started for the j th time;
when the automobile starts to run after the jth start, the oil consumption and the mileage data of the automobile need to be updated every other preset time period in the running process,
at this time, the fuel consumption is displayed within a preset kth time period T:
wherein, thetajkThe fuel consumption of the automobile is shown after the jth start in the kth period T;
Bjkrepresenting the residual fuel quantity after the k period of the automobile after the jth start;
Sjkrepresenting the mileage of the automobile in the kth period after the jth start;
the method for calculating the remaining mileage displayed in the kth time period T of the jth start comprises the following steps:
wherein Sm isjkThe display method comprises the steps of displaying the remaining driving mileage displayed in the kth period T after the jth start of the automobile;
Bjkrepresenting the residual fuel quantity after the k period of the automobile after the jth start;
Sjirepresenting the mileage of the automobile in the ith period after the jth start;
θjithe fuel consumption of the automobile is displayed in the ith period T after the automobile is started for the jth time;
compared with the fuel consumption and remaining mileage display method in the prior art, the fuel consumption and remaining mileage display calculation method can fully consider the driving record of the driver, fully consider the weight proportion in different time intervals in the remaining mileage display method in the driving process, better accord with the driving habit, the traffic jam, the highway and other scenes of the driver, enable the display to be more accurate, and improve the user experience.
Example 2
The embodiment provides a vehicle instrument backup and display method, which specifically comprises the following steps:
step S1, normally starting a first device and a second device, wherein the first device outputs signals to a digital instrument display screen for display after acquiring the signals, and the second device does not output signals to the digital instrument display screen and runs in a system background in a low power consumption mode when the first device runs normally;
specifically, the first device is a system used when the system normally operates, the second device is a standby system of the first device, and the second device is operated when the first device fails and cannot normally operate;
the second device is the same as the first device or only comprises necessary functional systems for normal running of the vehicle;
step S2, the first device sends heartbeat signals to the second device periodically, and the second device monitors the heartbeat signals sent by the first device;
step S3, if the second device does not receive the heartbeat signal within the preset threshold value or the received signal is incorrect, the second device sends a signal to the switch display switching module to interrupt the output signal of the first system and display the signal output by the second device.
In step S1, the digital instrument display screen is a digital display screen, the first device is physically connected to the second device, and the connection interface types include UART, SPI, I2C, GPIO, and vehicle ethernet interface;
the first device and the second device are connected with a display screen of the digital instrument through a display signal change-over switch, and the display signal change-over switch cannot be simultaneously connected with both the first device and the second device;
in step S1, when the first device operates normally, the first device periodically transmits data to the second device for data synchronization, and the second device updates the system data after receiving the data transmitted by the first device;
in step S3, after the second device displays normally, the second device continues to monitor the heartbeat signal of the first device, and when the heartbeat signal of the first device is not received within a preset threshold, the first device is forcibly restarted by the restart module, where the restart process includes controlling a power supply switch connected to the first device by the restart module, physically disconnecting the power supply switch, and then connecting the power supply switch, and forcibly restarting the first device;
after the first device is restarted, the automatic testing function block starts to automatically test the system function according to a preset program, in the testing process, the testing result is displayed on a testing display screen, and the testing monitoring equipment keeps monitoring the testing display screen and feeds back the monitoring result;
when the first device is restarted and passes the test, a heartbeat signal is sent to the second device, the second device sends a control instruction to the switch display switching module to block the signal and switch the signal into an output signal of the first device after receiving a normal heartbeat signal of the first device, and the second device is converted into a background to keep running with low power consumption.
The display content of the digital instrument display screen comprises a fixed display picture and a dynamic display picture, the fixed display picture displays key sensor information in the vehicle, the dynamic display picture displays common sensor information, the dynamic display picture comprises a plurality of different sensor pictures, and the sensor pictures are displayed according to a preset display sequence, display time and display frequency;
the key sensor information comprises speed, mileage, engine speed, oil temperature, gear shifting signals and the like;
the information of the common sensors comprises tire pressure display, vehicle window opening and closing state display, tail door display, air conditioner pictures, vehicle lamps, windshield wipers and the like;
displaying the common sensor information according to a preset picture sequence, and simultaneously carrying out priority sequencing on the common sensor information, wherein the display frequency and the retention time with high priority are greater than those with low priority, when a fault occurs, the fault picture interrupts the current normally displayed picture to display, and when a plurality of faults occur, the faulted picture information is dynamically displayed without displaying the non-faulted dynamic picture;
the display screen of the digital instrument comprises the display of the fuel consumption and the remaining driving mileage, and the display method of the fuel consumption and the remaining driving mileage is shown in the embodiment 1.
What has been described above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments. It is clear to those skilled in the art that the form in this embodiment is not limited thereto, and the adjustable manner is not limited thereto. It is understood that other modifications and variations directly derivable or suggested by a person skilled in the art without departing from the basic idea of the invention are considered to be within the scope of protection of the invention.
Claims (11)
1. A vehicle instrument standby display system, comprising: the digital instrument display screen, the display signal change-over switch, the first device and the second device, wherein the display signal change-over switch is respectively connected with the first device, the second device and the digital instrument display screen;
the first device is configured to output signals to a display screen of the digital instrument for display, and the first device is defined as a system common device; the second device is configured to output a signal to the display screen of the digital instrument for displaying when the first device fails and cannot normally operate;
and the digital instrument display screen is configured to display a picture formed by a signal preset in the vehicle.
2. The vehicle instrument standby display system of claim 1, further comprising a plurality of ECUs installed in the vehicle, wherein the plurality of ECUs in the vehicle are respectively connected to the first device and the second device, and the connection interface types include UART, SPI, I2C, GPIO, and vehicle ethernet interface;
the first device is connected with the second device, the first device periodically sends heartbeat signals or data to the second device, and the second device monitors the heartbeat signals sent by the first device;
when the first device operates normally, the second device operates in a background state, and signals of the second device are not output to the display screen of the digital instrument.
3. The vehicle instrument standby display system according to claim 1, wherein the second device is used as a standby system for the first device, and the second device is identical to the first device or can perform a main function of the first device, the main function being defined as a function satisfying a predetermined instrument display requirement.
4. The standby display system for meters for vehicles according to claim 1, wherein the display signal switch is configured to control the output signals of the first device and the second device to switch, and when the first device is in normal operation, the output signal of the second device is blocked from the digital meter display screen, and only the signal of the first device is allowed to be transmitted to the digital meter display screen; when the first device can not normally operate, the display signal change-over switch thereof blocks the signal of the first device from being output to the digital instrument display screen and only allows the signal of the second device to be transmitted to the digital instrument display screen.
5. The instrument standby display system for vehicles of claim 1, wherein the display signal changeover switch comprises a physical circuit switch, a semiconductor switch, or a digital switch implemented by FPGA, and the display signal changeover switch is controlled by the first means or the second means or both the first means and the second means.
6. The vehicle instrument standby display system according to claim 1, wherein the first device comprises an automatic test function module, a first storage module, a system backup module;
the automatic test function module is configured to automatically test preset functions after the system is restarted due to faults;
a first storage module configured to store ECU signal data from an in-vehicle network;
and the system backup module is configured to periodically backup the operating system of the first device, and after the first device is restarted after a fault occurs, if the automatic test function module fails to test the system, the system is started to restore.
7. The vehicle instrument standby display system of claim 6, wherein the first storage module comprises a primary function data storage module, a secondary function data storage module, and a system backup data storage module, the primary function data storage module is used for storing primary function data, and the first device periodically synchronizes the primary function data to the second device;
the system backup data stores data of an initial system and a latest backup system built in the first device, and when a system backup module needs to backup or restore the system, the data in the system backup data storage module needs to be called.
8. The vehicle instrument standby display system according to claim 2, wherein the second device comprises a second storage module, a second monitoring module, and a restarting module;
a second storage module configured to store data transmitted from the first apparatus;
the second monitoring module is configured to monitor the heartbeat signal sent by the first device;
the restarting module is configured to restart the first device after the first device fails and no heartbeat signal is received or a received heartbeat signal is wrong within a preset threshold range.
9. The standby display system of claim 8, wherein when the first device restarts normal operation, the first device immediately sends a heartbeat signal to the second device, the second device immediately controls the switching signal switching device to switch on the first device and interrupt the second device after monitoring a normal heartbeat signal through the second monitoring module, and then the digital instrument display screen normally displays an output signal of the first device.
10. The vehicle instrument standby display system according to claim 1, wherein the display contents of the digital instrument display screen include a fixed display screen and a dynamic display screen, the fixed display screen displays the key sensor information in the vehicle, the dynamic display screen displays the common sensor information, and the dynamic display screen includes a plurality of different sensor screens, which are displayed according to a preset display sequence, a preset display time and a preset display frequency;
the key sensor information includes speed, mileage, engine speed, oil temperature, shift signals,
the information of the common sensors comprises tire pressure display, vehicle window opening and closing state display, tail door display, air conditioner pictures, vehicle lamps and wipers.
11. The vehicle instrument standby display system according to claim 1, further comprising a test display screen and a test monitoring device, wherein the test display screen and the test monitoring device are respectively connected to the first device;
the test display screen is used for restarting the output signal for displaying the first device after the first device fails, and the test monitoring equipment is used for monitoring the output signal of the first device to the test display screen when the automatic test function module performs function test on the restarted system.
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| CN201922016121.6U CN211280643U (en) | 2019-11-19 | 2019-11-19 | Standby display system for vehicle instrument |
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| CN112046284A (en) * | 2020-09-11 | 2020-12-08 | 马瑞利汽车电子(广州)有限公司 | Display recovery system of automobile liquid crystal instrument |
| CN114435132A (en) * | 2022-01-13 | 2022-05-06 | 重庆长安汽车股份有限公司 | Automobile instrument on-off logic method and system and vehicle |
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