CN112964259A - Instrument navigation method and system of vehicle - Google Patents
Instrument navigation method and system of vehicle Download PDFInfo
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- CN112964259A CN112964259A CN202110084648.1A CN202110084648A CN112964259A CN 112964259 A CN112964259 A CN 112964259A CN 202110084648 A CN202110084648 A CN 202110084648A CN 112964259 A CN112964259 A CN 112964259A
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- 238000005538 encapsulation Methods 0.000 claims abstract description 31
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims description 29
- 230000009471 action Effects 0.000 claims description 24
- 238000013144 data compression Methods 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/3407—Route searching; Route guidance specially adapted for specific applications
- G01C21/3415—Dynamic re-routing, e.g. recalculating the route when the user deviates from calculated route or after detecting real-time traffic data or accidents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3626—Details of the output of route guidance instructions
- G01C21/3647—Guidance involving output of stored or live camera images or video streams
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/36—Input/output arrangements for on-board computers
- G01C21/3667—Display of a road map
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- Radar, Positioning & Navigation (AREA)
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Abstract
The invention relates to the field of instrument navigation, in particular to an instrument navigation method and an instrument navigation system of a vehicle. The instrument navigation method comprises the following steps: the mobile terminal acquires a navigation road condition map; compressing the navigation road condition map and performing protocol encapsulation processing to obtain corresponding picture data; the mobile terminal transmits the processed picture data to an instrument end; and the instrument end analyzes the picture data to obtain a navigation road condition map and displays the navigation road condition map in real time. The navigation road condition graph acquired in real time is transmitted to the instrument end in the form of picture data through the mobile terminal, the picture data is analyzed through the instrument end, the simple navigation road condition graph corresponding to the mobile terminal is displayed in real time, the simple navigation information and the navigation road condition graph are directly transmitted to the instrument end in the form of the picture data with low delay and are displayed in real time, the navigation instantaneity and the function expansibility are guaranteed, and the navigation system is very convenient to use.
Description
Technical Field
The invention relates to the field of instrument navigation, in particular to an instrument navigation method and an instrument navigation system of a vehicle.
Background
In the application of vehicles such as motorcycles, electric vehicles and automobiles, people usually adopt an instrument end to navigate, plan a route through a mobile terminal, and use the instrument end to display and indicate a destination, especially the application of instrument navigation in motorcycles.
The traditional simple navigation mode is that a navigation action picture is reserved at an instrument end in advance, the instrument end is informed to display a plurality of navigation action pictures stored on the local area with limitations through a mobile terminal according to a specified navigation action type, and corresponding simple navigation state, destination information, driving direction, distance information and the like are displayed in a text or simple icon form in real time. In addition, the existing simple navigation mode may also cause inconvenience for users due to the fact that navigation action pictures displayed in real time at the instrument end and navigation information of the mobile terminal cannot be completely unified.
Therefore, the existing simple navigation mode has very limited navigation information, and the situation that the instrument navigation information is inconsistent with the mobile terminal to cause inconvenience in use can occur, so that the existing instrument navigation requirement, especially the instrument navigation of a motorcycle, can not be met far.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and a system for navigating an instrument of a vehicle, aiming at the above defects of the prior art, and solve the problems that the navigation information of the prior instrument is limited, the real-time performance is poor, the use is inconvenient, and the navigation requirement cannot be met.
The technical scheme adopted by the invention for solving the technical problems is as follows: the instrument navigation method of the vehicle is provided, an instrument end of the vehicle is in communication connection with a mobile terminal, and the instrument navigation method comprises the following steps:
the mobile terminal acquires a navigation road condition map;
compressing the navigation road condition map and performing protocol encapsulation processing to obtain corresponding picture data;
the mobile terminal transmits the processed picture data to an instrument end;
and the instrument end analyzes the picture data to obtain a navigation road condition map and displays the navigation road condition map in real time.
Further preferred embodiments of the present invention are: the method for compressing the navigation road condition map and performing protocol encapsulation processing to obtain corresponding picture data comprises the following steps:
cutting the navigation road condition map into a preset size;
performing data compression on the cut navigation road condition map;
and converting the compressed data into array data, and obtaining picture data corresponding to the navigation road condition map through protocol encapsulation processing.
Further preferred embodiments of the present invention are: the step of compressing the navigation road condition map and performing protocol encapsulation processing to obtain the picture data further comprises the following steps:
and adjusting the navigation road condition map to perform data compression and controlling the size of the array data correspondingly converted.
Further preferred embodiments of the present invention are: and performing data compression on the cut navigation road condition graph in a mode of modifying the picture quality parameters according to a web format.
Further preferred embodiments of the present invention are: the meter navigation method further comprises the steps of:
the mobile terminal acquires navigation action information and road information;
carrying out protocol encapsulation on the navigation action information and the road information to obtain encapsulated data;
the mobile terminal transmits the obtained encapsulation data to the instrument end;
and the instrument end analyzes the encapsulated data to obtain navigation action information and road information and displays the navigation action information and the road information in real time.
Further preferred embodiments of the present invention are: the method for analyzing the picture data by the instrument end comprises the following steps:
synthesizing picture data corresponding to the navigation road condition map into a corresponding navigation road condition map in a mode of converting a plurality of data;
and displaying the navigation road condition map obtained by conversion and synthesis in real time at the instrument end.
Further preferred embodiments of the present invention are: the mobile terminal is provided with a navigation application comprising a high level SDK, and acquires a navigation road condition map through a high level SDK callback API.
Further preferred embodiments of the present invention are: the meter navigation method further comprises the steps of:
when navigation meets corner road conditions, the Goods SDK reports navigation corner states and navigation road condition maps of corners;
and the navigation application acquires a navigation road condition map.
Further preferred embodiments of the present invention are: the navigation road condition map comprises one of an enlarged intersection map and an enlarged lane map.
The technical scheme adopted by the invention for solving the technical problems is as follows: the instrument navigation system of the vehicle is characterized in that the instrument navigation system realizes instrument navigation by applying the instrument navigation method of any one of the above methods, and comprises a mobile terminal, an instrument end and a communication module, wherein,
the mobile terminal is provided with a navigation application, and the navigation application is used for acquiring a navigation road condition map, compressing the navigation road condition map and carrying out protocol encapsulation processing on the navigation road condition map to obtain picture data;
the communication module transmits the obtained picture data to an instrument end;
and the instrument terminal analyzes the picture data to obtain a navigation road condition map and displays the navigation road condition map in real time.
The invention has the advantages that compared with the prior art, the navigation road condition graph is obtained, the navigation road condition graph is compressed and subjected to protocol encapsulation to obtain the picture data, the picture data is transmitted to the instrument end in a picture data mode, the image data is analyzed by the instrument end to obtain the navigation road condition graph, and the navigation road condition graph is displayed in real time to realize that the navigation road condition graph is directly transmitted to the instrument end in low delay of the picture data and is displayed in real time, so that a user can judge a driving route more intuitively when facing complex road conditions and roads, meanwhile, the navigation road condition graphs in the mobile terminal and the instrument end can be ensured to be completely unified, the displayed navigation road condition graph can be updated according to the updating of navigation, the real-time performance and function expansibility of navigation are better ensured, and the use is very convenient.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a block flow diagram of a meter navigation method of a vehicle of the present invention;
FIG. 2 is a block diagram of a process for processing a navigation traffic map to obtain corresponding image data according to the present invention;
FIG. 3 is a block diagram of a process of analyzing image data corresponding to a navigation traffic map according to the present invention;
FIG. 4 is an effect diagram of the road condition map display of the instrument navigation;
fig. 5 is a block diagram showing the structure of a meter navigation system of a vehicle according to the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a preferred embodiment of a meter navigation method of a vehicle.
Referring to fig. 5, the instrument navigation system of the vehicle includes a mobile terminal 100, a communication module 300 and an instrument end 200, and the mobile terminal 100 is in communication connection with the instrument end 200 through the communication module 300 to transmit data. In addition, the instrument navigation method of the invention can be applied to instrument navigation of vehicles such as motorcycles, tricycles, automobiles and the like, and is particularly applied to instrument navigation of motorcycles.
Referring to fig. 1, the meter navigation method of a vehicle includes the steps of:
s10, the mobile terminal acquires a navigation road condition map;
s20, compressing the navigation road condition map and carrying out protocol encapsulation processing to obtain corresponding picture data;
s30, the mobile terminal transmits the processed picture data to an instrument end;
and S40, analyzing the picture data by the instrument end to obtain a navigation road condition map and displaying the navigation road condition map in real time.
The obtained navigation road condition graph is compressed and protocol-packaged through the mobile terminal, the navigation road condition graph is transmitted to the instrument end in the form of picture data, the picture data is analyzed through the instrument end, the navigation road condition graph corresponding to the mobile terminal is displayed in real time, the navigation road condition graph is directly transmitted to the instrument end in a low-delay mode through the picture data and is displayed in real time, therefore, a user can judge a driving route more visually when facing complex road conditions and roads, meanwhile, the navigation road condition graph in the mobile terminal and the instrument end can be guaranteed to be completely unified, the displayed navigation road condition graph can be updated according to navigation updating, and navigation instantaneity and function expansibility are better guaranteed. The navigation road condition map comprises one of an enlarged intersection map and an enlarged lane map, and complex road conditions and roads, particularly road conditions of corner intersections, can be visually observed through the navigation road condition maps such as the enlarged intersection map and the enlarged lane map.
Referring to fig. 2, the step S20 of compressing the navigation road condition map and performing protocol encapsulation processing to obtain corresponding picture data includes the steps of:
s21, cutting the navigation road condition map into a preset size;
s22, performing data compression on the cut navigation road condition map;
and S23, converting the compressed data into array data, and obtaining picture data corresponding to the navigation road condition map through protocol encapsulation processing.
The navigation road condition graph is cut and compressed, and finally transmitted to the instrument end in the form of picture data, the instrument end receives the picture data and analyzes the picture data, the navigation road condition graph is recombined to be displayed at the instrument end, the data transmission quantity between the mobile terminal and the instrument end is small, high delay is avoided, the real-time performance of navigation information transmission is guaranteed, the whole process does not exceed 1 second, the navigation road condition graph of the mobile terminal can be updated to the instrument end in real time to be displayed, and the user navigation can be better facilitated. In addition, in the process of cutting and compressing the navigation road condition map, the cut navigation road condition map can be subjected to data compression in a mode of modifying picture quality parameters according to a web format, and the quality of the navigation road condition map is controlled by adjusting the size of the array data correspondingly converted by the quality control of the data compression of the navigation road condition map, so that the quality of the navigation road condition map is ensured while the data transmission amount and the transmission delay are reduced.
Specifically, the mobile terminal is provided with navigation application comprising a high-level SDK, the mobile terminal obtains a navigation road condition map through a high-level SDK callback API, the high-level SDK is a free open SDK (software Development kit) in high-level, namely a software Development kit, functions and interface customization of an instrument end can be realized, the application is more flexible, third-party navigation software does not need to be installed on the instrument end, and the cost is saved. The specific processing process of the navigation road condition map by the navigation application is as follows: the navigation road condition map obtained through the Goodpasts SDK is a bitmap (bitmap) picture, the bitmap picture is cut into a picture with the size of 300X180 according to a bitmap cutting function, data of about 50k of an original picture can be subjected to picture data compression according to a web format in a mode of modifying picture quality parameters after being cut into the size of 300X180, the data are compressed to be within 10k, and the navigation road condition map after data compression is finished does not appear fuzzy; converting the compressed picture data into byte array data, performing data encapsulation according to a preset protocol, transmitting the encapsulated array data to an instrument end, performing data encapsulation on the navigation road condition map according to the preset protocol, referring to table 1, converting the byte array data into a bitmap image format navigation road condition map by a method of converting the byte array data into a bitmap after the instrument end receives the array data, and finally displaying the bitmap image on the instrument end, wherein the navigation display effect can be referred to in fig. 4. The above-mentioned cropped picture size and the size of the picture data are only examples, and do not limit the specific picture size and the size range of the picture data of the present invention.
TABLE 1
Further, the meter navigation method of the present invention further comprises the steps of:
the mobile terminal acquires navigation action information and road information;
carrying out protocol encapsulation on the navigation action information and the road information to obtain encapsulated data;
the mobile terminal transmits the obtained encapsulation data to the instrument end;
and the instrument end analyzes the encapsulated data to obtain navigation action information and road information and displays the navigation action information and the road information in real time.
The instrument end packages the protocol to obtain the navigation action information and road information which are displayed in real time after the packaged data are analyzed, so that good auxiliary driving can be provided for users. In the process of protocol encapsulation, the navigation action information can carry out data encapsulation according to the protocol of the following table 2; the road information may be data-encapsulated according to the protocol of table 2 below. The invention improves the simple navigation of the traditional instrument, not only contains the traditional simple navigation information such as destination information distance information and driving direction information, but also displays the navigation action information and road information of the mobile terminal such as electronic eye information, electronic eye speed limit, next action icon, next action character description, next road name, next road distance and the like on the instrument end in real time, and displays the navigation road condition diagram such as a corner enlarged image, a lane enlarged image and the like, thereby providing good auxiliary driving in the face of complex road conditions and roads and better reminding a user to avoid illegal driving.
TABLE 2
TABLE 3
Furthermore, the mobile terminal is in communication connection with the instrument end through the Bluetooth communication module, the mobile terminal transmits picture data and encapsulation data obtained by compressing, converting data and performing protocol encapsulation to the instrument end through a Bluetooth SPP protocol or a BLE protocol, the instrument end receives the picture data and the encapsulation data transmitted from the Bluetooth communication module, and corresponding road condition enlarged images, navigation action information and road information are displayed in real time after analysis. This mobile terminal can adopt the cell-phone, and bluetooth communication module can locate on the cell-phone, and in other embodiments, mobile terminal can be electronic equipment such as intelligent bracelet, panel computer, and can adopt wireless communication module such as wiFi communication module, 2.4G communication module and instrument end communication connection.
Referring to fig. 3, at the meter end, the analyzing the picture data by the meter end includes the steps of:
s41, converting the picture data corresponding to the navigation road condition map into a corresponding navigation road condition map in a mode of converting data;
and S42, displaying the converted and synthesized navigation road condition map at the instrument end in real time.
The navigation road condition map synthesized by data conversion at the instrument end can be updated in real time according to the updating of the mobile terminal navigation, and the navigation road condition map navigated by the mobile terminal is subjected to data compression, data conversion and protocol encapsulation in real time and then converted into the navigation road condition map displayed at the instrument end, so that the navigation system can well assist driving in the face of complex road conditions and roads, and can better remind a user of avoiding illegal driving.
Similarly, the instrument end converts the navigation action information and the encapsulated data corresponding to the road information into the simple navigation information in a data conversion mode for displaying.
Further, the meter navigation method further comprises the steps of:
when navigation meets corner road conditions, the Goods SDK reports navigation corner states and navigation road condition maps of corners;
and the navigation application acquires a navigation road condition map.
In the navigation process, when a corner road condition is met, a corner state is reported through a God SDK of a navigation application to control the display of a corner navigation road condition map, the corner state comprises left turning, right turning, head dropping and the like, and the specific process is as follows: when a road condition of a corner exists, the navigation application Goodpasts SDK reports a navigation corner state and a navigation road condition map of the corner, then the navigation application cuts and compresses the obtained original navigation road condition map of the corner, the cut and compressed navigation road condition map is subjected to data compression and protocol encapsulation and is transmitted to an instrument end, the instrument end receives picture data and then performs data array conversion again to form the navigation road condition map of the corner, and the navigation road condition map of the corner is displayed, the whole process cannot exceed 1s, and the delay of other navigation road condition pictures such as a lane enlarged image is generally within 100ms, so that the simple navigation information and the corner enlarged image of the mobile terminal can be updated to the instrument end in real time and displayed, and the navigation of a user is facilitated.
Compared with the traditional third-party mobile phone interconnection scheme, the instrument navigation method does not need to integrate third-party software at the instrument end, does not need to fully lay all navigation interfaces on the instrument end in a screen projection mode, can selectively display navigation road condition maps which are more important in navigation, such as intersection corner enlarged images, lane enlarged images and the like, at the instrument end, and can display the navigation road condition maps and the mobile terminal in proportion on the same screen, thereby reducing the development cost of the third party and saving the cost; and, the flexibility is stronger, and the developer can customize navigation display layout, and show the content
The present invention also provides a preferred embodiment of a meter navigation system for a vehicle, as shown in fig. 5.
Referring to fig. 5, the instrument navigation system of the vehicle implements instrument navigation by applying the above-mentioned instrument navigation method, and includes a mobile terminal 100, an instrument end 200 and a communication module 300, where the mobile terminal 100 is provided with a navigation application 110, and the navigation application 110 is configured to obtain a navigation road condition map, compress the navigation road condition map, and perform protocol encapsulation processing on the navigation road condition map to obtain picture data; the communication module 300 transmits the obtained picture data to the meter end 200; the meter end 200 analyzes the picture data to obtain the simple navigation information and the navigation road condition map and displays the simple navigation information and the navigation road condition map in real time.
The navigation road condition map acquired in real time is transmitted to the instrument end 200 through the communication module 300 in the form of picture data through the mobile terminal 100, the picture data is analyzed through the instrument end 200, the navigation road condition map corresponding to the mobile terminal 100 is displayed in real time, and the navigation road condition map is directly transmitted to the instrument end 200 in low delay of the picture data and is displayed in real time, so that a user can judge a driving route more intuitively when facing a complex road condition and a complex road, meanwhile, the simple navigation information and the navigation road condition map in the mobile terminal 100 and the instrument end 200 can be ensured to be completely unified, the displayed navigation road condition map can be updated according to the updating of navigation, and the real-time performance and the function expansibility of the navigation are better ensured. The simple navigation information comprises the name of the next intersection, the distance of the next intersection, electronic eye information, navigation action icons, character information and the like, and the navigation road condition map comprises an enlarged corner intersection image, an enlarged lane image and the like. The communication module 300 may specifically adopt a bluetooth communication module 300, a WiFi communication module 300, a 2.4G communication module 300, and the like, in this embodiment, the bluetooth communication module 300 is preferably adopted, and the bluetooth communication module 300 may be carried by the mobile terminal 100, the mobile terminal 100 transmits the navigation road condition map to the meter end 200 in the form of picture data through the bluetooth communication module 300, and updates the navigation road condition map in real time according to the update of the navigation of the mobile terminal 100, so as to more facilitate the user to judge the driving route.
When the instrument navigation system is applied, the bluetooth communication module 300 of the mobile terminal 100 can be connected with the instrument end 200 of the vehicle, the navigation application 110 of the mobile terminal 100 is opened, a navigation route is planned at the mobile terminal 100, and the picture data corresponding to the real-time navigation road condition map is transmitted to the instrument end 200 of the vehicle through the bluetooth SPP protocol or the BLE protocol of the bluetooth communication module 300, so that the navigation of a user is facilitated.
It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations are intended to fall within the scope of the appended claims.
Claims (10)
1. A meter navigation method of a vehicle is characterized in that a meter end of the vehicle is in communication connection with a mobile terminal, and the meter navigation method comprises the following steps:
the mobile terminal acquires a navigation road condition map;
compressing the navigation road condition map and performing protocol encapsulation processing to obtain corresponding picture data;
the mobile terminal transmits the processed picture data to an instrument end;
and the instrument end analyzes the picture data to obtain a navigation road condition map and displays the navigation road condition map in real time.
2. The instrument navigation method according to claim 1, wherein the step of compressing the navigation road map and performing protocol encapsulation processing to obtain corresponding picture data comprises the steps of:
cutting the navigation road condition map into a preset size;
performing data compression on the cut navigation road condition map;
and converting the compressed data into array data, and obtaining picture data corresponding to the navigation road condition map through protocol encapsulation processing.
3. The instrument navigation method according to claim 2, wherein the step of compressing the navigation road map and performing protocol encapsulation processing to obtain the picture data further comprises the steps of:
and adjusting the navigation road condition map to perform data compression and controlling the size of the array data correspondingly converted.
4. The instrument navigation method according to claim 2, characterized in that the clipped navigation road map is subjected to data compression in a manner of modifying picture quality parameters according to a web format.
5. The meter navigation method according to claim 1, further comprising the steps of:
the mobile terminal acquires navigation action information and road information;
carrying out protocol encapsulation on the navigation action information and the road information to obtain encapsulated data;
the mobile terminal transmits the obtained encapsulation data to the instrument end;
and the instrument end analyzes the encapsulated data to obtain navigation action information and road information and displays the navigation action information and the road information in real time.
6. The meter navigation method according to claim 1, wherein the meter terminal parsing the picture data comprises the steps of:
synthesizing picture data corresponding to the navigation road condition map into a corresponding navigation road condition map in a mode of converting a plurality of data;
and displaying the navigation road condition map obtained by conversion and synthesis in real time at the instrument end.
7. The meter navigation method according to claim 1, wherein the mobile terminal is provided with a navigation application including a high definition multimedia key (SDK), and the mobile terminal obtains the navigation road condition map through a high definition SDK callback Application Program Interface (API).
8. The meter navigation method according to claim 7, further comprising the steps of:
when navigation meets corner road conditions, the Goods SDK reports navigation corner states and navigation road condition maps of corners;
and the navigation application acquires a navigation road condition map.
9. The meter navigation method according to any one of claims 1 to 8, wherein the navigation road map comprises one of an enlarged intersection view and an enlarged lane view.
10. A meter navigation system of a vehicle, characterized in that the meter navigation system implements meter navigation using the meter navigation method according to any one of claims 1 to 9, comprising a mobile terminal, a meter terminal and a communication module, wherein,
the mobile terminal is provided with a navigation application, and the navigation application is used for acquiring a navigation road condition map, compressing the navigation road condition map and carrying out protocol encapsulation processing on the navigation road condition map to obtain picture data;
the communication module transmits the obtained picture data to an instrument end;
and the instrument terminal analyzes the picture data to obtain a navigation road condition map and displays the navigation road condition map in real time.
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