CN116125983A - Vehicle speed limit adjustment method, device, electronic equipment and storage medium - Google Patents
Vehicle speed limit adjustment method, device, electronic equipment and storage medium Download PDFInfo
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Abstract
The application discloses a vehicle speed limit adjusting method, a device, electronic equipment and a storage medium, wherein the vehicle speed limit adjusting method comprises the following steps: acquiring an effective vehicle braking distance, sudden braking acceleration and current network delay time length; obtaining target reaction time; if the current network delay time length is smaller than or equal to a preset threshold value, the maximum speed limit of the vehicle is adjusted according to the effective vehicle braking distance, the sudden braking acceleration, the current network delay time length and the target reaction time length, the network delay time length of the vehicle acquired data transmitted to the simulator and the network delay time length of the simulator for transmitting the remote command to the vehicle are considered, the target reaction time length of a user is fully considered, the maximum speed limit of the vehicle in the remote driving process can be adjusted more accurately, and the safety of remote driving is improved.
Description
Technical Field
The present application relates to the field of remote driving technologies, and in particular, to a vehicle speed limit adjustment method, device, electronic apparatus, and storage medium.
Background
Remote driving refers to remote VR control, and a driver sends various operation instructions on a simulation cabin operation table in a remote VR virtual environment to control remote automobile safety operation. The remote automatic driving is composed of a road condition sensing system, a vehicle-mounted control system and remote control systems; the remote control system comprises a remote driving software system, a data management system, a high-precision map monitor and an operation desk, and the system uses a 5G network to transmit time delay reaching millisecond level. In the remote driving technology, the speed limit of the vehicle is a fixed value, and cannot be adjusted according to the real-time condition, so that the safety in the remote driving process is reduced.
Disclosure of Invention
In view of the above problems, the present application provides a vehicle speed limit adjustment method, a device, an electronic apparatus, and a storage medium.
In a first aspect, an embodiment of the present application provides a vehicle speed limit adjustment method, including: acquiring an effective vehicle braking distance, sudden braking acceleration and current network delay time length; obtaining a target reaction time length, wherein the target reaction time length is used for representing the reaction time length from the fact that a user finds a target to the fact that the brake pedal is stamped down; and if the current network delay time is smaller than or equal to a preset threshold value, adjusting the maximum speed limit of the vehicle according to the effective vehicle braking distance, the sudden braking acceleration, the current network delay time and the target reaction time.
In a second aspect, an embodiment of the present application provides a vehicle speed limit adjustment device, the device including: the acquisition module is used for acquiring the effective vehicle braking distance, the sudden braking acceleration and the current network delay time length; the target reaction time length acquisition module is used for acquiring target reaction time length, and the target reaction time length is used for representing the reaction time length from the fact that a user finds a target to the fact that the user presses down the brake pedal; and the adjusting module is used for adjusting the maximum speed limit of the vehicle according to the effective vehicle braking distance, the sudden braking acceleration, the current network delay time length and the target reaction time length if the current network delay time length is smaller than or equal to a preset threshold value.
In a third aspect, an embodiment of the present application provides an electronic device, including: one or more processors; a memory; one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, the one or more applications configured to perform the vehicle speed limit adjustment method provided in the first aspect above.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium having stored therein program code that is callable by a processor to perform the vehicle speed limit adjustment method provided in the first aspect above.
According to the scheme, the maximum speed limit of the vehicle is adjusted through the effective vehicle braking distance, the sudden braking acceleration, the current network delay time length and the target reaction time length, the network delay time length from the vehicle acquisition data transmission to the simulator and the network delay time length from the simulator to the vehicle are considered, the reaction time length of a user is fully considered, the maximum speed limit of the vehicle in the remote running process can be adjusted more accurately, and the safety of remote running is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows an application scenario schematic diagram of a vehicle speed limit adjustment method according to an embodiment of the present application.
Fig. 2 is a schematic flow chart of a vehicle speed limit adjustment method according to an embodiment of the present application.
Fig. 3 is a schematic flow chart of a vehicle speed limit adjustment method according to another embodiment of the present application.
Fig. 4 shows a block diagram of a vehicle speed limit adjustment device according to an embodiment of the present application.
Fig. 5 shows a block diagram of an electronic device for executing the vehicle speed limit adjustment method according to the embodiment of the present application.
Fig. 6 shows a storage medium provided by an embodiment of the present application for storing or carrying program code for implementing a vehicle speed limit adjustment method according to an embodiment of the present application.
Detailed Description
In order to enable those skilled in the art to better understand the present application, the following description will make clear and complete descriptions of the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application.
The vehicle speed limit adjustment method provided by the application can be applied to an application environment shown in fig. 1. The in-vehicle terminal 010 can communicate with the simulator 030 through the server 020. When the simulator 030 issues a remote instruction, the server 020 receives the remote instruction and processes the remote instruction, so that the in-vehicle terminal 010 can receive the remote instruction processed by the server 020 through the network, and the in-vehicle terminal 010 performs a series of operations such as stopping, starting, and the like according to the remote instruction. The vehicle-mounted terminal 010 also transmits acquired data acquired in the driving process to the simulator 030 through the server 020, and the display screen of the simulator 030 displays the driving environment, driving parameters and current driving road condition information of the vehicle-mounted terminal 010 to a user.
The simulator 030 may include a series of terminal devices such as a tablet or a computer that receive user instructions and may communicate via a server and a network. Simulator 030 may also have steering wheel, seat, foot brake, etc. control devices. Simulator 030 may receive a user instruction via an APP or an interface, such as a terminal interface, that allows a user to input the instruction. The server 020 may be implemented as a stand-alone server or as a server cluster composed of a plurality of servers. The in-vehicle terminal 010 may be, but not limited to, various kinds of single-chip computers, microcontrollers, DSPs (digital signal processors), FPGAs (Field-Programmable Gate Array, i.e., field programmable gate arrays), upper computers, electronic control units (ECU, electronic Control Unit), or central processing units (CPU, central Processing Unit), or the like, and may be a whole vehicle or a part of devices in the whole vehicle provided with the above units and/or devices.
Aiming at the problems, the embodiment of the application provides a vehicle speed limit adjusting method, a device, electronic equipment and a storage medium, and effective vehicle braking distance, sudden braking acceleration and current network delay time length are obtained; obtaining a target reaction time length, wherein the target reaction time length is used for representing the reaction time length from the fact that a user finds a target to the fact that the brake pedal is stamped down; and if the current network delay time is smaller than or equal to a preset threshold value, adjusting the maximum speed limit of the vehicle according to the effective vehicle braking distance, the sudden braking acceleration, the current network delay time and the target reaction time.
According to the scheme, the maximum speed limit of the vehicle is adjusted through the effective vehicle braking distance, the sudden braking acceleration, the current network delay time length and the target reaction time length, the network delay time length from the vehicle acquisition data to the simulator and the network delay time length from the simulator to the vehicle are considered, the target reaction time length of a user is fully considered, the maximum speed limit of the vehicle in the remote running process can be adjusted more accurately, and the safety of remote running is improved.
Referring to fig. 2, fig. 2 is a flow chart illustrating a vehicle speed limit adjustment method according to an embodiment of the disclosure. In a specific embodiment, the vehicle speed limit adjustment method is applied to the vehicle speed limit adjustment device 300 shown in fig. 4 and the electronic apparatus 100 provided with the vehicle speed limit adjustment device 300.
The following details about the flow shown in fig. 2, the vehicle speed limit adjustment method specifically may include the following steps:
step S110: and acquiring an effective vehicle braking distance, sudden braking acceleration and current network delay time length.
The braking distance of the vehicle is the maximum distance on the simulator screen, the road condition displayed on the simulator screen is reduced according to the real road condition according to the preset proportion, the preset proportion of the current road condition is displayed on the simulator screen, and the real distance displayed on the simulator screen under the current road condition is also displayed. When the real distance under the current road condition is obtained through the simulator display screen, the real distance is taken as the vehicle braking distance, and as the attention of the user is focused on the screen and the attention of the edge part is not high, a part of the vehicle braking distance is taken as the effective vehicle braking distance. In this application, the effective vehicle braking distance is preferably 2/3 of the vehicle braking distance, and the effective vehicle braking distance may also be determined according to a specific requirement of a user, which is not limited herein.
The sudden braking acceleration refers to acceleration that decreases the vehicle speed after the vehicle receives a braking command. The sudden braking acceleration corresponding to different braking demands is different in magnitude, and the magnitude of the sudden braking acceleration can be displayed through a simulator display screen. The sudden braking acceleration in the scheme refers to the acceleration during the sudden braking, and the sudden braking acceleration is larger, preferably-6 m/s 2 . It will be appreciated that the sudden braking acceleration may be set according to the actual situation.
The current network time length comprises, but is not limited to, the network time delay time length of the vehicle acquisition data transmitted to the simulator and the network time delay time length of the simulator for transmitting the remote command to the vehicle, wherein the current network time delay time length can be the network time delay time length of the vehicle acquisition data transmitted to the simulator, the network time delay time length of the simulator for transmitting the remote command to the vehicle, and the network time delay time length obtained by calculating the network time delay time length of the vehicle acquisition data transmitted to the simulator and the network time delay time length of the simulator for transmitting the remote command to the vehicle.
The network time delay time length of the vehicle acquisition data transmitted to the simulator means that the vehicle acquires the environmental data around the vehicle in the running process through the acquisition device arranged on the vehicle body, the vehicle acquisition data is transmitted to the simulator through network transmission, and the network transmission of the data can generate network time delay due to broadband reasons or distance reasons.
The network delay time of the simulator sending the remote command to the vehicle means that when the user finds that an emergency occurs under the current driving road condition, the remote command needs to be sent to the vehicle through the simulator according to the emergency. For example, when a user steps on a brake pedal, the simulator determines the acquired brake pedal information as a brake command and transmits the brake command to the vehicle, and network delay is explained in the transmission process of the brake command due to network speed or other reasons.
Preferably, the network delay time length of the vehicle acquisition data transmitted to the simulator and the network delay time length of the simulator for transmitting the remote command to the vehicle are obtained, and the sum of the network delay time length of the vehicle acquisition data transmitted to the simulator and the network delay time length of the simulator for transmitting the remote command to the vehicle is calculated and used as the current network delay time length.
The network delay time length of the vehicle acquired data transmitted to the simulator and the network delay time length of the simulator for sending the remote command to the vehicle can be obtained through a Ping-Pong delay detection mode.
The Ping-Pong delay detection mode refers to Ping-Pong test, and the transmitted data is used as a ball and transmitted between two points A and B. And obtaining the network delay time length of the two points A-B by analyzing the rebound times in unit time. For example, the network delay time length of the transmission of the vehicle acquisition data to the simulator is obtained, the vehicle acquisition data is transmitted back and forth between the vehicle acquisition device and the simulator within 1min, and the transmission times within 1min are obtained, so that the network delay time length of the transmission of the current vehicle acquisition data to the simulator is obtained.
Step S120: and obtaining a target reaction time length, wherein the target reaction time length is used for representing the reaction time length from the fact that a user finds a target to the fact that the brake pedal is stamped down.
In the specific implementation process, the target reaction time is 0.6S-1.2S. In the present embodiment, the target reaction time period is preferably 1.2S.
Step S130: and if the current network delay time is smaller than or equal to a preset threshold value, adjusting the maximum speed limit of the vehicle according to the effective vehicle braking distance, the sudden braking acceleration, the current network delay time and the target reaction time.
Because the data is transmitted through the network, network delay is generated, when the current network delay time is smaller than or equal to a preset threshold value, the distance of the vehicle running in the current network delay time is not too long, and therefore the maximum speed limit of the vehicle can be adjusted through the effective vehicle braking distance, the sudden braking acceleration, the current network delay time and the target reaction time. The magnitude of the preset threshold may be preset, or may be set by the user according to actual needs, which is not specifically limited herein.
In the specific implementation process, the vehicle needs to be stopped within the distance S, and the middle part is divided into four parts:
1. the vehicle collects the peripheral video and sends to the transmission network delay time length T1 of the simulator;
2. the reaction time TR from the user finding the target to the depression of the brake pedal is obtained, and the reaction time TR of the human being is generally 0.6 seconds to 1.2 seconds, which is 1.2 seconds in the present embodiment. The vehicle moves at a constant speed with the maximum speed limited in the reaction time, and the distance travelled by the vehicle in the reaction time is 1.2V.
3. After the pedal is stepped on, the brake information is sent to the simulator, the simulator sends a remote command to the vehicle, and the network delay time length T2 between the simulator sends the remote command to the vehicle is obtained;
because the transmission network delay time length T1 from the peripheral video of the vehicle acquisition to the simulator and the network delay time length T2 from the remote command to the vehicle can be detected through the traditional ping-pong operation, and the delay time length detected through the ping-pong mode is recorded as T. The vehicle is in constant motion at the maximum speed limit in the process of sending the vehicle acquisition peripheral video to the simulator and sending the remote command to the vehicle by the simulator, namely, the distance travelled by the vehicle in the two processes is V x T.
4. The vehicle deceleration distance. The vehicle performs uniform deceleration motion after receiving the remote command of the simulator. The acceleration a of the general vehicle in sudden braking is-6 m/s 2 The stopping distance of the vehicle is V 2 /2a＝V 2 /12。
The method comprises the following steps: effective vehicle braking distance, sudden braking acceleration and current networkThe time delay duration and the target reaction duration satisfy the relation: s=v 2 2 x a+v x t+tr x V, wherein S is the effective vehicle braking distance, a is the sudden braking acceleration, T is the current network delay time, TR is the target reaction time, and V is the maximum speed limit; and obtaining the maximum speed limit of the vehicle according to the relation.
As can be seen from the above-mentioned relational expression,
when the sudden braking acceleration a and the target reaction time TR are constants, the maximum speed limit of the vehicle is only related to the effective vehicle braking distance S and the current network delay time, the maximum speed limit of the vehicle is positively related to the effective vehicle braking distance S, and the maximum speed limit of the vehicle is negatively related to the current network delay time. When the effective vehicle braking distance and the current network delay time length are both changed, the maximum speed limit of the vehicle needs to be obtained according to the relation. />
In the embodiment of the application, the maximum speed limit of the vehicle is adjusted through the effective vehicle braking distance, the sudden braking acceleration, the current network delay time length and the target reaction time length, so that the network delay time length of the vehicle acquired data transmitted to the simulator and the network delay time length of the simulator transmitted to the vehicle are considered, the target reaction time length of a user is fully considered, the maximum speed limit of the vehicle in the remote running process can be adjusted more accurately, and the safety of remote running is improved.
Referring to fig. 3, fig. 3 shows a flow chart of a vehicle speed limit adjustment method according to another embodiment of the present application, which specifically includes the following steps:
step S210: and acquiring an effective vehicle braking distance, sudden braking acceleration and current network delay time length.
Step S220: and obtaining a target reaction time length, wherein the target reaction time length is used for representing the reaction time length from the fact that a user finds a target to the fact that the brake pedal is stamped down.
The detailed descriptions of step S210 to step S220 refer to step S110 to step S120, and are not repeated here.
Step S230: and if the current network delay time is greater than the preset threshold value, controlling the vehicle to automatically stop.
When the current network delay time is longer than a preset threshold value, it may be that the network delay time of the vehicle acquisition data transmitted to the simulator exceeds a preset time. At this time, the vehicle collected data cannot be timely transmitted to the simulator, which can cause a user to misjudge the environment in the running process of the vehicle. The emergency environment can be judged as a normal environment, normal running can be maintained, and accidents are easy to cause.
The current network delay time being greater than the preset threshold may also be that the network delay time of the simulator sending the remote command to the vehicle exceeds the preset time. When the vehicle runs to an emergency environment, emergency braking is needed, overlong network delay is generated when the simulator sends a braking command to the vehicle, at the moment, the vehicle cannot perform braking operation in time, and the vehicle keeps a normal running state and is easy to violate traffic rules.
The current network delay time being greater than the preset threshold value may be a network delay time for transmitting the vehicle acquisition data to the simulator, and a network delay time for transmitting the remote command to the vehicle by the simulator, which simultaneously exceeds the preset time correspondingly set. At this time, the environment judgment of the user on the running process of the vehicle is inaccurate, and the remote command received by the vehicle is not timely, so that safety accidents can be caused.
Therefore, when the current network delay time is longer than the preset threshold value, in the scheme of the application, an automatic braking function is set, for example, the vehicle speed is limited to 0, so that adverse effects caused by environment misjudgment and/or remote command receiving delay can be further avoided, and the driving safety during remote driving is ensured.
Referring to fig. 4, a block diagram of a vehicle speed limit adjustment device 300 according to an embodiment of the present application is shown. The vehicle speed limit adjustment device 300 is applied to the electronic apparatus 100, and the vehicle speed limit adjustment device 300 includes: an obtaining module 310, configured to obtain an effective vehicle braking distance, an sudden braking acceleration, and a current network delay time length; a target reaction duration obtaining module 320, configured to obtain a target reaction duration, where the target reaction duration is used to characterize a reaction duration from when a user finds a target to when the brake pedal is depressed; the adjusting module 330 is configured to adjust the maximum speed limit of the vehicle according to the effective vehicle braking distance, the sudden braking acceleration, the current network delay time length, and the target reaction time length if the current network delay time length is less than or equal to a preset threshold.
In some embodiments of the present application, the vehicle speed limit adjustment device 300 further includes: and the automatic braking module is used for controlling the automatic braking of the vehicle if the current network delay time is greater than the preset threshold value.
In some embodiments of the present application, the adjustment module 330 includes: the maximum speed limit acquisition module is used for enabling the effective vehicle braking distance, the sudden braking acceleration, the current network delay time length and the target reaction time length to meet the relation: s=v 2 2 x a+v x t+tr x V, wherein S is the effective vehicle braking distance, a is the sudden braking acceleration, T is the current network delay time, TR is the target reaction time, and V is the maximum speed limit; and obtaining the maximum speed limit of the vehicle according to the relation.
In some embodiments of the present application, the acquisition module 310 includes: the delay time length acquisition module is used for acquiring network delay time length of the vehicle acquired data transmitted to the simulator and network delay time length of the simulator for transmitting a remote command to the vehicle; the current network delay time length calculation module is used for calculating the sum of the network delay time length of the vehicle acquired data transmitted to the simulator and the network delay time length of the simulator for transmitting the remote command to the vehicle, and the sum is used as the current network delay time length.
In some embodiments of the present application, the current network delay time length calculation module includes: the network delay time length acquisition module is used for acquiring the network delay time length of the vehicle acquired data transmitted to the simulator in a Ping-Pong delay detection mode and transmitting a remote command to the network delay time length of the vehicle by the simulator.
In some embodiments of the present application, the vehicle speed limit adjustment device 300 further includes: and the target reaction time length determining module is used for determining the target reaction time length to be 0.6S-1.2S.
In some embodiments of the present application, the vehicle speed limit adjustment device 300 further includes an effective vehicle braking distance acquisition module configured to have an effective vehicle braking distance greater than or equal to 2/3 of the vehicle braking distance.
According to the scheme, the maximum speed limit of the vehicle is adjusted through the effective vehicle braking distance, the sudden braking acceleration, the network delay time length from the vehicle acquisition data to the simulator, the network delay time length from the simulator to the vehicle and the target reaction time length, the network delay time length from the vehicle acquisition data to the simulator and the network delay time length from the simulator to the vehicle are taken into consideration, the target reaction time length of a user is fully taken into consideration, the maximum speed limit of the vehicle in the remote running process can be adjusted more accurately, and the safety of remote running is improved. And when the current network delay time exceeds a preset threshold, the automatic brake is started, so that the safety of remote driving can be further improved.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus and modules described above may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein.
In several embodiments provided herein, the coupling of the modules to each other may be electrical, mechanical, or other.
In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules.
Referring to fig. 5, a block diagram of an electronic device according to an embodiment of the present application is shown. The electronic device 100 may be a vehicle-mounted terminal, a computer, or a control unit with data transmission. The electronic device 100 in this application may include one or more of the following components: a processor 101, a memory 102, and one or more application programs, wherein the one or more application programs may be stored in the memory 102 and configured to be executed by the one or more processors 101, the one or more program(s) configured to perform the method as described in the foregoing method embodiments.
Processor 101 may include one or more processing cores. The processor 101 utilizes various interfaces and lines to connect various portions of the overall electronic device 100, perform various functions of the electronic device 100 and process data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 102, and invoking data stored in the memory 102. Alternatively, the processor 101 may be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor 101 may integrate one or a combination of several of a central processing unit (Central Processing Unit, CPU), a graphics processor (Graphics Processing Unit, GPU), and a modem, etc. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for being responsible for rendering and drawing of display content; the modem is used to handle wireless communications. It will be appreciated that the modem may not be integrated into the processor 101 and may be implemented solely by a single communication chip.
The Memory 102 may include a random access Memory (Random Access Memory, RAM) or a Read-Only Memory (Read-Only Memory). Memory 102 may be used to store instructions, programs, code, sets of codes, or sets of instructions. The memory 102 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (e.g., a touch function, a sound playing function, an image playing function, etc.), instructions for implementing various method embodiments described below, and the like. The storage data area may also store data created by the electronic device 100 in use (e.g., phonebook, audiovisual data, chat log data), and the like.
Referring to fig. 6, a block diagram of a computer readable storage medium according to an embodiment of the present application is shown. The computer readable storage medium 200 has stored therein program code that can be invoked by a processor to perform the methods described in the method embodiments described above.
The computer readable storage medium 200 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. Optionally, the computer readable storage medium 200 comprises a non-volatile computer readable medium (non-transitory computer-readable storage medium). The computer readable storage medium 200 has storage space for program code 210 that performs any of the method steps described above. The program code can be read from or written to one or more computer program products. Program code 210 may be compressed, for example, in a suitable form.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A vehicle speed limit adjustment method, the method comprising:
acquiring an effective vehicle braking distance, sudden braking acceleration and current network delay time length;
obtaining a target reaction time length, wherein the target reaction time length is used for representing the reaction time length from the fact that a user finds a target to the fact that the brake pedal is stamped down;
and if the current network delay time is smaller than or equal to a preset threshold value, adjusting the maximum speed limit of the vehicle according to the effective vehicle braking distance, the sudden braking acceleration, the current network delay time and the target reaction time.
2. The method of claim 1, further comprising, after the obtaining the target reaction time period:
and if the current network delay time is greater than the preset threshold value, controlling the vehicle to automatically stop.
3. The method of claim 1, wherein adjusting the maximum speed limit of the vehicle based on the effective vehicle braking distance, the sudden braking acceleration, the current network delay time length, and the target reaction time length if the current network delay time length is less than or equal to a preset threshold value comprises:
the effective vehicle braking distance, the sudden braking acceleration, the current network delay time length and the target reaction time length meet the relation: s=v2/2×a+vt+trv, where S is the effective vehicle braking distance, a is the sudden braking acceleration, T is the current network delay time, TR is the target reaction time, and V is the maximum speed limit; and obtaining the maximum speed limit of the vehicle according to the relation.
4. The method of claim 1, wherein the obtaining the current network delay time length comprises:
acquiring network delay time length of the vehicle acquisition data transmitted to the simulator, and transmitting a remote command to the network delay time length of the vehicle by the simulator;
and calculating the sum of the network delay time length of the vehicle acquired data transmitted to the simulator and the network delay time length of the simulator for transmitting the remote command to the vehicle, and taking the sum as the current network delay time length.
5. The method of claim 4, wherein the method for obtaining the network delay time length for the vehicle acquisition data to be transmitted to the simulator and the network delay time length for the simulator to send the remote command to the vehicle comprises the following steps:
and acquiring the network delay time length of the vehicle acquired data transmitted to the simulator and the network delay time length of the simulator for transmitting the remote command to the vehicle in a Ping-Pong delay detection mode.
6. The method of claim 1, wherein the target reaction time period is 0.6S to 1.2S.
7. The method of any one of claims 1-6, wherein the effective vehicle braking distance is greater than or equal to 2/3 of the vehicle braking distance.
8. A vehicle speed limit adjustment device, the device comprising:
the acquisition module is used for acquiring the effective vehicle braking distance, the sudden braking acceleration and the current network delay time length;
the target reaction time length acquisition module is used for acquiring target reaction time length, and the target reaction time length is used for representing the reaction time length from the fact that a user finds a target to the fact that the user presses down the brake pedal;
and the adjusting module is used for adjusting the maximum speed limit of the vehicle according to the effective vehicle braking distance, the sudden braking acceleration, the current network delay time length and the target reaction time length if the current network delay time length is smaller than or equal to a preset threshold value.
9. An electronic device, comprising:
one or more processors;
a memory;
one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, the one or more applications configured to perform the method of any of claims 1-7.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a program code, which is callable by a processor for executing the method according to any one of claims 1-7.
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