CN113055526B - Self-adaptive mobile phone non-inductive interconnection method based on automobile driving state - Google Patents
Self-adaptive mobile phone non-inductive interconnection method based on automobile driving state Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/48—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
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Abstract
The invention discloses a self-adaptive mobile phone non-inductive interconnection method based on an automobile driving state, which comprises the following steps: acquiring vehicle speed information from a vehicle-mounted system according to a first preset period, judging whether the vehicle speed is less than a preset vehicle speed threshold value or not, and whether the duration time less than the preset vehicle speed threshold value reaches a preset time threshold value or not, and if any one condition is not met, sending a full screen projection request to a mobile phone screen projection module; otherwise, sending the APP screen projection request to the mobile phone screen projection module. According to the invention, different screen projection technologies can be adopted to project the screen of the vehicle-mounted screen in a self-adaptive manner according to different states of the vehicle, so that the vehicle-mounted screen can be used more flexibly, conveniently and efficiently, and the experience of a driver is improved.
Description
Technical Field
The invention relates to the technical field of intelligent vehicle-mounted, in particular to a self-adaptive mobile phone non-inductive interconnection method based on an automobile driving state.
Background
The smart phone, the vehicle-mounted central control and instrument screen projection are important components in the current car networking function, and not only consumers but also internet car enterprises are concerned widely. Such as carplay by apple, carpife by Baidu, etc. By means of high hardware configuration of the smart phone and strong application ecology of software, functions of driving assistance behaviors such as navigation, music, AI deep recognition and the like are conveniently provided for a driver in real time, the vehicle-mounted large screen and the high performance of the smart phone can be used effectively, and accordingly development of the internet of vehicles is promoted.
In the existing technology of screen projection of the intelligent mobile phone, an APP screen projection method is mostly adopted, and as long as the intelligent mobile phone is linked to a vehicle-mounted system, a user opens screen projection software, the screen projection software is always in a screen projection state, and the driving state of a vehicle is not concerned. In practice, the driving state of the automobile is diversified, and a user usually only needs the screen projection navigation function of a mobile phone when driving after ignition; however, when the train stops or the non-ignition ACC is turned on, only the navigation function is displayed in a non-driving state, so that the usability of the vehicle-mounted large screen is reduced.
For example, patent No. CN210490926U discloses a full-screen mobile phone interconnection system for automobiles. On one hand, the user needs to use the USB for connection or the Bluetooth for connection, and then uses the mobile phone APP for screen projection, which needs manual operation. On the other hand, after the mobile phone navigation APP is opened, the mobile phone full-projection screen still runs in the mobile phone mode navigation software, the mobile phone navigation APP and the APP are partially projected in the screen, such as carife and the like, the navigation has the vehicle-mounted mode, and the route and the guideboard are large pictures in the vehicle-mounted mode, so that the running mode of the pure mobile phone full-projection screen in the driving of the automobile is still inferior to that of the APP in the vehicle-mounted mode. For another example, patent No. CN207115385U discloses a visible car backing and wireless phone projection smart meter based on LINUX operating system. And the interface information such as mobile phone navigation images, music and the like is projected to the liquid crystal touch screen completely so as to be watched on a large screen. In the driving process of the automobile, the navigation APP can process the vehicle-mounted mode, and the using effect is suitable for the driver in driving. However, in a state where the ignition car is stopped or in a state where the ignition ACC is turned on, such a screen projection function is single, and only maps can be searched and music can be listened to, and other APP functions of the mobile phone cannot be used on the car-mounted screen. In the non-driving state of the vehicle, the effects of the large screen on the vehicle on using other APP functions of the mobile phone are wasted.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the self-adaptive mobile phone non-inductive interconnection method based on the automobile driving state, different screen projection technologies are adopted to project the screen of the vehicle-mounted screen in a self-adaptive manner according to different states of the vehicle, the vehicle-mounted screen can be used more flexibly, conveniently and efficiently, and the experience of a driver is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a self-adaptive mobile phone non-inductive interconnection method based on an automobile driving state comprises the following steps:
s1, when the vehicle-mounted system is started, initializing a screen projection module at the vehicle-mounted end, establishing a connection channel between the vehicle-mounted system and the mobile phone system, starting the screen projection module at the mobile phone end, and completing a handshake flow between the vehicle-mounted end and the mobile phone end;
s2, acquiring vehicle speed information from the vehicle-mounted system according to a first preset period, judging whether the vehicle speed is less than a preset vehicle speed threshold value, if so, entering a step S3, otherwise, entering a step S4;
s3, judging whether the duration time of the vehicle speed less than the preset vehicle speed threshold reaches the preset time threshold, if so, judging whether the current vehicle-mounted screen projection mode is full screen projection, if not, sending a full screen projection request to the mobile phone screen projection module, and returning to the step S2; if the duration of the vehicle speed less than the preset vehicle speed threshold does not reach the preset duration threshold, directly returning to the step S2;
s4, judging whether the current vehicle-mounted screen projection mode is an APP screen projection mode, if so, directly returning to the step S2, otherwise, sending an APP screen projection request to the mobile phone screen projection module and returning to the step S2;
the mobile phone screen projection module identifies the type of the latest screen projection request sent by the vehicle-mounted screen projection module according to a second preset period, and executes a corresponding screen projection switching instruction according to an identification result;
the full screen projection mode is to project the complete interface of the mobile phone to the vehicle-mounted display, and the APP screen projection mode is to project the navigation software interface to the vehicle-mounted display.
In order to optimize the technical scheme, the specific measures adopted further comprise:
further, the first preset period is smaller than a second preset period, and the second preset period is smaller than a preset time threshold.
Further, in step S1, when the vehicle-mounted system is started, the process of initializing the vehicle-mounted screen projection module, establishing a connection channel between the vehicle-mounted system and the mobile phone system, starting the mobile phone screen projection module, and completing the handshake process between the vehicle-mounted terminal and the mobile phone terminal includes the following steps:
s11, initializing a vehicle-mounted end screen projection module cast _ scr _ monitor;
s12, the mobile phone is monitored to be connected with the vehicle-mounted terminal in a USB wire harness and Bluetooth/WIFI mode, if the mobile phone is connected with the vehicle-mounted terminal, the vehicle-mounted terminal screen projection module cast _ scr _ monitor is started, and a handshake signal is sent to the mobile phone terminal through a socket so as to start the mobile phone terminal screen projection module cast _ scr _ phone;
and S13, returning a handshake signal to the vehicle-mounted screen projection module cast _ scr _ monitor by the mobile phone screen projection module cast _ scr _ phone, and completing a handshake process.
Further, the first preset period is 1 ms.
Further, the preset duration threshold is 2 minutes.
The invention has the beneficial effects that:
(1) according to different states of the vehicle, different screen projection technologies are adopted in a self-adaptive mode to project screens on the vehicle-mounted screen, the vehicle-mounted screen can be used flexibly, conveniently and efficiently, and the experience feeling of a driver is improved.
(2) Two circulation sentences are arranged at the vehicle-mounted end and the mobile phone end, and the frequent screen switching problem caused by common driving state abnormalities such as unstable vehicle running, slight traffic jam and the like is reduced by reasonably setting inquiry periods corresponding to the two circulation sentences and combining continuous duration monitoring.
Drawings
Fig. 1 is a flow chart of the self-adaptive mobile phone non-inductive interconnection method based on the automobile driving state.
Fig. 2 is a schematic view of a driving state of the automobile of the present invention.
Fig. 3 is a schematic diagram of a connection mode between the vehicle-mounted terminal and the mobile phone terminal according to the present invention.
Fig. 4 is a schematic diagram of a handshake flow between a vehicle-mounted terminal and a mobile phone terminal according to the present invention.
Fig. 5 is a flowchart of one example of the screen projection control of the present invention.
Fig. 6 is a schematic diagram of two screen projection states.
Fig. 7 is a screen projection principle diagram in conjunction with a vehicle running state.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
It should be noted that the terms "upper", "lower", "left", "right", "front", "back", etc. used in the present invention are for clarity of description only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not limited by the technical contents of the essential changes.
With reference to fig. 1, the present invention provides an adaptive mobile phone non-inductive interconnection method based on an automobile driving state, where the adaptive mobile phone non-inductive interconnection method includes the following steps:
and S1, when the vehicle-mounted system is started, initializing the screen projection module of the vehicle-mounted end, establishing a connection channel between the vehicle-mounted system and the mobile phone system, starting the screen projection module of the mobile phone end, and completing the handshake flow of the vehicle-mounted end and the mobile phone end.
S2, vehicle speed information is obtained from the vehicle-mounted system according to a first preset period, whether the vehicle speed is smaller than a preset vehicle speed threshold value or not is judged, if yes, the step S3 is executed, and if not, the step S4 is executed.
S3, judging whether the duration time of the vehicle speed less than the preset vehicle speed threshold reaches the preset time threshold, if so, judging whether the current vehicle-mounted screen projection mode is full screen projection, if not, sending a full screen projection request to the mobile phone screen projection module, and returning to the step S2; and if the duration of the vehicle speed less than the preset vehicle speed threshold does not reach the preset duration threshold, directly returning to the step S2.
And S4, judging whether the current vehicle-mounted terminal screen projection mode is an APP screen projection mode, if so, directly returning to the step S2, and otherwise, sending an APP screen projection request to the mobile phone terminal screen projection module and then returning to the step S2.
And the mobile phone screen projection module identifies the type of the latest screen projection request sent by the vehicle-mounted terminal screen projection module according to a second preset period, and executes a corresponding screen projection switching instruction according to an identification result.
The full screen projection mode is to project the complete interface of the mobile phone to the vehicle-mounted display, and the APP screen projection mode is to project the navigation software interface to the vehicle-mounted display.
The driving state of the automobile is shown in fig. 2. A1: ACC on; a2: the ignition is not driven; a3: in the ignition driving process; a4: stopping running by ignition; a5: flame off and ACC off; a6: when the ACC is closed and other automobile states, the intelligent mobile phone can change the screen projection mode in a self-adaptive mode, such as full screen projection and single APP screen projection to an automobile-mounted screen, and the screen projection mode of wired connection or wireless connection is achieved.
The invention relates to two hardware devices, as shown in fig. 3, a vehicle-mounted display 1 includes a USB interface or a BT/WIFI module; the smart phone 2 comprises a GPS module, a Bluetooth module or a WIFI module; dotted line 3 means that vehicle-mounted and cell-phone realize data transmission and throw screen control through USB pencil or bluetooth/WIFI wireless connection. The handshake flow between the two is as follows:
and S11, the vehicle keeps the ACC on, whether ignition is not required or not is judged, and the vehicle-mounted system can supply power and operate the system.
S12, as shown in fig. 4, the screen projecting module cast _ scr _ monitor on the vehicle side initializes, and monitors whether the mobile phone and the vehicle are connected in a USB harness or a bluetooth/WIFI manner. If the connection exists, the screen projection module cast _ scr _ monitor operates, and handshake signals are sent to the smart phone through socket communication. After the USB/BT/WIFI link, the screen projection module cast _ scr _ phone operates on the smart phone side, and after a handshake signal request is received, ok is sent to the vehicle-mounted side to complete the software flow of R1, and the vehicle-mounted screen projection module and the smart phone screen projection module complete the handshake function. In fig. 4, the grey block diagram is the handshake flow.
As for the screen projection control flow, it is shown in fig. 5. The vehicle-mounted cast _ scr _ monitor module runs while (1) circulation and judges the vehicle speed every 1 ms. Whether the vehicle is in a stopped state or in a driving state is determined based on whether the current vehicle speed is 0. Therefore, the full screen projection mode or the APP screen projection mode is selected. If the mode is the full screen projection mode, judging whether the current mode is the full screen projection mode, and if so, returning; if not, quitting the APP screen projection and sending a full screen projection request. The smart mobile phone cast _ csr _ phone module is in while (2) circulation, waits for the vehicle-mounted screen projection mode request to be sent, and after receiving, judges which type the screen is, if the screen is projected fully, then executes the screen projection fully, if the screen is projected by APP, then executes the APP screen projection. The switching between the two screen projection modes and the time for exiting the current mode are confirmed and executed by the vehicle.
And if the vehicle is in the S3 state during running, executing the APP screen-throwing-in navigation software vehicle-mounted mode. If the vehicle is in the stop state S2/S4/S5, full screen projection is carried out to the vehicle-mounted display screen to display a launcher picture of the mobile phone, and the driver can operate the launcher picture by himself.
Two display states are included in fig. 6: state 1, full screen projection mode: and in the non-driving state after ignition S2/S4/S5, a full screen projection of the mobile phone is adopted, the complete interface of the mobile phone is displayed on the vehicle-mounted display in a mode, and after the mobile phone is touched, the content of the vehicle-mounted screen is synchronous with the mobile phone. If the vehicle-mounted display has the function of a touch screen, the content of the mobile phone side is synchronously changed after the vehicle-mounted display is touched. State 2, APP screen projection mode: and the driving state S3 after ignition adopts the APP part to throw the screen, namely APP navigation and music throw the screen, and enters a navigation APP vehicle-mounted mode, and most screens of the vehicle-mounted display are occupied.
Fig. 7 is a screen projection process diagram corresponding to the whole driving behavior of one type of automobile. When the automobile is in the S1 state, the vehicle-mounted system can search whether the USB is connected or not in priority, and when the USB is not connected, the authenticated smart phone is searched through BT/WIFI, and after the smart phone and the vehicle-mounted system are successfully linked; the vehicle-mounted device judges which screen projection mode is adopted according to the current vehicle speed, and if the vehicle speed is 0, in S2/S4/S5, a full screen projection mode is adopted, and an instruction is sent to the smart phone; and if the vehicle speed is 0, the vehicle is in an S3 state, and the APP navigation screen projection is adopted.
If the first preset period is equal to the second preset period and the vehicle-mounted end and the mobile phone end are synchronous, the fastest screen switching effect can be achieved. However, in practical application, because the vehicle has the conditions of starting shake, unstable vehicle speed and short-time unstable vehicle speed caused by similar slight traffic jam, frequent screen switching times caused by some abnormal driving can be filtered by judging the duration time of the vehicle speed lower than a preset vehicle speed threshold (such as 0) between the screen projection mode and the full screen projection mode by the APP, but when the screen projection mode is switched from the full screen projection mode to the APP screen projection mode, the screen switching times completely depend on the communication speed and the operation speed of two end parts, and some abnormal screen switching can be caused inevitably. For example, after the current automobile is switched from a running state to a stopping state for 2 minutes, the current automobile is switched to be in an app screen projection state, the automobile shakes, the speed of the automobile is no longer 0, the vehicle-mounted end immediately sends a full screen projection instruction to the mobile phone end, and if the mobile phone end immediately processes the instruction, the vehicle-mounted display enters a full screen projection interface. However, if the vehicle only shakes for a short time at this time, and the vehicle speed drops to 0 again soon, the vehicle-mounted end needs to send the app screen-casting switching instruction again to the mobile phone end for processing after 2 minutes, and the vehicle needs to stay on the full screen-casting interface all the time in this period. In order to avoid the problem, the first preset period is smaller than the second preset period, and the second preset period is smaller than the preset time threshold, so that the mobile phone end does not switch immediately after receiving the full-screen-projection switching instruction, but switches after waiting for a time, and the time that the vehicle-mounted display screen stays on the full-screen-projection interface under the situation is shortened. This is also a trade-off made in view of the actual driving habits. In actual driving, when the vehicle speed is gradually increased by 0, and the vehicle drives again, the requirement on navigation is not so strong at the moment due to the fact that the vehicle speed is low, and full screen-projection switching can be performed after waiting for a period of time.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (5)
1. A self-adaptive mobile phone non-inductive interconnection method based on an automobile driving state is characterized by comprising the following steps:
s1, when the vehicle-mounted system is started, initializing a screen projection module at the vehicle-mounted end, establishing a connection channel between the vehicle-mounted system and the mobile phone system, starting the screen projection module at the mobile phone end, and completing a handshake flow between the vehicle-mounted end and the mobile phone end;
s2, acquiring vehicle speed information from the vehicle-mounted system according to a first preset period, judging whether the vehicle speed is less than a preset vehicle speed threshold value, if so, entering a step S3, otherwise, entering a step S4;
s3, judging whether the duration time of the vehicle speed less than the preset vehicle speed threshold reaches the preset time threshold, if so, judging whether the current vehicle-mounted screen projection mode is full screen projection, if not, sending a full screen projection request to the mobile phone screen projection module, and returning to the step S2; if the duration of the vehicle speed less than the preset vehicle speed threshold does not reach the preset duration threshold, directly returning to the step S2;
s4, judging whether the current vehicle-mounted screen projection mode is an APP screen projection mode, if so, directly returning to the step S2, otherwise, sending an APP screen projection request to the mobile phone screen projection module and returning to the step S2;
the mobile phone screen projection module identifies the type of the latest screen projection request sent by the vehicle-mounted terminal screen projection module according to a second preset period, and executes a corresponding screen projection switching instruction according to an identification result;
the full screen projection mode is to project the complete interface of the mobile phone to the vehicle-mounted display, and the APP screen projection mode is to project the navigation software interface to the vehicle-mounted display.
2. The self-adaptive mobile phone non-inductive interconnection method based on the automobile driving state according to claim 1, wherein the first preset period is smaller than a second preset period, and the second preset period is smaller than a preset time threshold.
3. The self-adaptive mobile phone non-sensory interconnection method based on the automobile driving state according to claim 1, wherein in step S1, the process of initializing the screen projection module at the vehicle-mounted end, establishing a connection channel between the vehicle-mounted system and the mobile phone system, starting the screen projection module at the mobile phone end, and completing the handshake process between the vehicle-mounted end and the mobile phone end includes the following steps:
s11, initializing a vehicle-mounted end screen projection module cast _ scr _ monitor;
s12, the mobile phone is monitored to be connected with the vehicle-mounted terminal in a USB wire harness and Bluetooth/WIFI mode, if the mobile phone is connected with the vehicle-mounted terminal, the vehicle-mounted terminal screen projection module cast _ scr _ monitor is started, and a handshake signal is sent to the mobile phone terminal through a socket so as to start the mobile phone terminal screen projection module cast _ scr _ phone;
and S13, returning a handshake signal to the vehicle-mounted screen projection module cast _ scr _ monitor by the mobile phone screen projection module cast _ scr _ phone, and completing a handshake process.
4. The adaptive mobile phone non-inductive interconnection method based on the driving state of the automobile according to claim 1, wherein the first preset period is 1 ms.
5. The adaptive mobile phone non-inductive interconnection method based on the automobile driving state according to claim 1, wherein the preset time threshold is 2 minutes.
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