CN112289060B - Drift-free simultaneous display method for weak signal scene - Google Patents
Drift-free simultaneous display method for weak signal scene Download PDFInfo
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/096805—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/096855—Systems involving transmission of navigation instructions to the vehicle where the output is provided in a suitable form to the driver
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
- G08G1/0969—Systems involving transmission of navigation instructions to the vehicle having a display in the form of a map
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Abstract
The invention discloses a drift-free driver-passenger simultaneous display method aiming at a weak signal scene, which is characterized in that when a long connection of a driver end for transmitting position information to a passenger end is disconnected under the condition of poor network signals of the passenger end, the passenger end cuts into a simulated navigation mode and displays a simulated advancing route; after receiving the long connection signal again, carrying out the parallel rail of the simulation position and the real position of the passenger end, and returning to the real long connection driver and passenger simultaneous display state; when the positioning callback of navigation stops returning under the condition that the positioning signal is weak at the driver end, the driver end cuts into a simulated navigation mode, and a simulated advancing route is displayed; after the positioning signals are recovered, the parallel rail of the simulated position and the real position of the driver side is carried out, and the real positioning navigation driver and the real display state are returned. Under the condition of signal loss, the invention enters an analog navigation mode, and the track is connected after the signal is recovered, so that the abrupt drift of the trolley is avoided.
Description
Technical Field
The invention relates to a simultaneous display method of driver and multiplier, in particular to a simultaneous display method of driver and multiplier without drift in a weak signal scene.
Background
The driver and passenger simultaneous display function synchronously displays the vehicle position, the route planning and the navigation information for the driver side and the passenger side. The passenger end depends on the driver end to send the vehicle position and navigation information in real time through long connection; the driver side provides positioning information by relying on navigation.
For the passenger side and the driver side, when in the environment of weak network and positioning signals, the following problems exist respectively:
1. when the signal is recovered, the actual position exceeds the current stopping position, and the trolley suddenly shifts forward to the actual position.
2. When the driver end is in the environment that the positioning signal is weak, the positioning callback of the navigation stops returning the position information, so that the vehicle of the driver is clearly running, but the navigation displays that the vehicle is in a stopped state, and the navigation information sent to the passenger end by the driver end is also in a stopped state. Also, after the signal is restored, a sudden drift phenomenon of the trolley occurs.
Disclosure of Invention
According to the drift-free simultaneous display method in the weak signal scene, the analog navigation mode is entered under the condition of signal loss, and the parallel rail is carried out after the signal is recovered, so that abrupt drift of the trolley is avoided.
The technical scheme adopted by the invention for solving the technical problems is to provide a drift-free simultaneous display method aiming at a weak signal scene, when the long connection of a driver end for transmitting position information to a passenger end is disconnected under the condition of poor network signals, the passenger end cuts into a simulated navigation mode and displays a simulated advancing route; after receiving the long connection signal again, carrying out the parallel rail of the simulation position and the real position of the passenger end, and returning to the real long connection driver and passenger simultaneous display state; when the positioning callback of navigation stops returning under the condition that the positioning signal is weak at the driver end, the driver end cuts into a simulated navigation mode, and a simulated advancing route is displayed; after the positioning signals are recovered, the parallel rail of the simulated position and the real position of the driver side is carried out, and the real positioning navigation driver and the real display state are returned.
Further, when the passenger side switches into the simulated navigation mode, the simulated advancing route takes a section of the navigation route planning returned to the passenger side by the driver side before the long connection is disconnected as a unit, and the advancing speed of each section of the route is set according to the length of the section and the traffic condition, and specifically comprises the following steps: s11: the passenger side obtains the section information of the navigation route planning returned by the driver side for the last time before the long connection is disconnected, the section information comprises unfinished sections, the longitude and latitude of the starting point and the finishing point of each section, the traffic condition of each section and the planned total residual time, the unfinished sections are L3, L4, L5 and L6 sections, the traffic conditions corresponding to each section are smooth, slow running, blocking and serious blocking respectively, and the total residual time is T; s12: calculating the actual distances of each segment to be D3, D4, D5 and D6 according to the longitude and latitude of the starting point and the ending point of each segment; s13: setting a speed ratio of each segment relative to a standard speed V according to the traffic condition of each segment; the corresponding speed ratios of the unobstructed traffic condition, the creep, the blockage and the serious blockage are 100%, 65%, 40% and 10% respectively; s14: calculating a standard speed according to the actual distance of each segment, the ratio of each segment relative to the standard speed and the total residual time; obtaining a standard speed V calculation formula as v=d3/(t×100%) +d4/(t×65%) +d5/(t×40%) +d6/(t×10%); s15: calculating the speed and the time V3=V, T3=D3/V3 of each segment according to the actual distance of each segment, the standard speed and the ratio of each segment relative to the standard speed; v4=v65%, t4=d4/V4; v5=v40%, t5=d5/V5; v6=v×10%, t6=d6/V6.
Further, when the passenger side cuts into the simulated navigation mode, if the long signal is received again before the simulated forward path reaches the last section, the real position is obtained, and the parallel track of the simulated position and the real position is carried out; if the simulated forward path reaches the last section and the long signal is not received again, judging the distance of the last section, if the distance of the last section is smaller than 500m, stopping simulated navigation, and waiting for the recovery of the long connection signal in situ until the long connection signal is received again; if the distance of the last section is greater than 500m, the standard speed with the ratio of 10% corresponding to the severe blockage is used as the simulation speed to slowly move forward, the simulation navigation is stopped within 500m from the end point, and the long connection signal is waited for in situ until the long connection signal is received again; and after receiving the long connection signal again, acquiring a real position, and merging the analog position and the real position.
Further, when the passenger side performs the parallel track of the simulation position and the real position, if the simulation position leads the real position, waiting for the real position to reach the simulation position and then moving forward in parallel track; if the simulation position is behind the real position, the simulation time is shortened, so that the simulation trolley is uniformly accelerated according to the current travelling speed until the simulation trolley is parallel to the real position: if the simulation position is in the L1 section and the real position has reached the L4 section when the long connection is restored, calculating the remaining simulation time T1 'of the L1 section and the required simulation time T2' of L2 to L4 according to the current simulation speed, then continuing to simulate the forward movement of the trolley, and setting the simulation time reaching the current real position as T (L4) = (T1 '+T2')65%; if the current simulation process is not performed yet, new real position pushing is received, and assuming that the pushed real position reaches the L5 section, firstly calculating the simulation time required by L4 to L5 to be T3 'according to the current simulation speed, then setting the simulation time reaching the current real position to be T (L5) = (T (L4) +T3') # -65%, gradually accelerating the speed of the simulation trolley when the simulation is reduced through successive iteration, stopping the simulation navigation after the simulation position and the real position are combined, and entering a real long-connection simultaneous display state.
Further, the driver side cuts into the simulated navigation mode, acquires the last running speed returned before stopping the navigation positioning callback, and if the last running speed is zero, the vehicle is in a stopped state, and the simulated navigation is canceled; if the last driving speed is not zero, acquiring current segment information returned before stopping navigation positioning callback, and calculating the remaining distance of the current segment; then acquiring the running speed of the last 10 times of callback before stopping navigation positioning callback, and calculating an average value as a simulation speed; stopping the simulated navigation after the simulated navigation path is ended, and waiting for the navigation positioning signal to recover; and after the navigation positioning signals are recovered, obtaining the real position, and merging the simulated position and the real position.
Further, when the driver side cuts into the simulated navigation mode, calculating the simulated advancing time of the current section through the remaining distance and the simulated speed of the current section, if the simulated advancing time of the current section is less than two seconds, merging the remaining distance of the current section into the next section, taking the remaining distance of the current section plus the distance of the next section as the simulated navigation distance, otherwise taking the remaining distance of the current section as the simulated navigation distance.
Further, when the driver side performs the parallel track of the simulation position and the real position, if the simulation position leads the real position, waiting for the real position to reach the simulation position and then moving forward in parallel track; if the simulation position is behind the real position, the simulation time is shortened, so that the simulation trolley is uniformly accelerated according to the current travelling speed until the simulation trolley is parallel to the real position.
Further, if the long connection between the driver end and the passenger end is not successfully reconnected in the two callback time, confirming that the long connection between the driver end and the passenger end is disconnected, and the passenger end cuts into the simulated navigation mode; wherein the callback time of the long connection is set to three seconds; and in the navigation process of the driver end, if the navigation SDK does not return the positioning information for three seconds, confirming that the navigation positioning callback stops returning, and switching into a simulated navigation mode by the driver end.
Further, after the passenger receives the long connection signal again, if the navigation re-plans the route, and the real position deviates from the route planned by the navigation before the long connection signal is interrupted, the passenger exits from the simulated navigation state, clears the simulated data, and directly displays the latest route track and the real position.
Compared with the prior art, the invention has the following beneficial effects:
according to the drift-free simultaneous display method for the weak signal scene, when the network signal of the passenger side is poor, the passenger side cuts into a simulated navigation mode, displays a simulated forward route, and sets the speed and the time according to the segment information; after the network signal is recovered, the parallel rail of the pseudo position and the real position is carried out, and the parallel rail is realized through repeated iteration, so that the abrupt drifting of the trolley at the passenger end is avoided; when the positioning signal of the driver end is weak, the driver end cuts into a simulated navigation mode, displays a simulated advancing route, sets the path and speed of the simulated navigation, and completes the simulation of the current section; after the signals to be positioned are recovered, the parallel rail of the simulation position and the real position is carried out, so that the abrupt drifting of the trolley at the passenger side is avoided.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a flow chart of a passenger side driver co-display in an embodiment of the invention;
fig. 2 is a schematic diagram of a segment traffic condition returned by navigation route planning in an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Example 1
According to the drift-free simultaneous display method in the weak signal scene, analog navigation is conducted on a passenger side and a driver side when signals are poor, and the simultaneous display of the drift-free simultaneous display is achieved by combining analog positions and real positions after signals are recovered.
When the long connection of the passenger end for transmitting the position information to the passenger end is disconnected under the condition of poor network signals, the passenger end cuts into a simulated navigation mode, and a simulated advancing route is displayed; and after receiving the long connection signal again, carrying out the parallel rail of the passenger side simulation position and the real position, and returning to the real long connection driver and passenger simultaneous display state.
Referring to fig. 1, in the simultaneous display process of driver and passenger, the long connection will return the vehicle position information at the driver end every three seconds, and if the long connection is disconnected for six seconds (i.e. two long connection callback times) and the reconnection is not successful, the simulated navigation mode is switched in.
When the passenger side enters the simulated navigation mode, the simulated advancing route takes the section of the navigation route planning returned to the passenger side by the driver side before the long connection is disconnected as a unit, and the advancing speed of each section of the route is set according to the length of the section and the traffic condition.
As shown in fig. 2, the passenger side obtains a schematic diagram of the traffic condition of the section returned by the navigation route planning returned by the driver side after the last time before the long connection is disconnected, and obtains the section information of the navigation route planning, as shown in the following table 1 section information table:
| numbering device | Remaining section | Each distance | Traffic system | Condition status | Speed ratio of |
| 1 | L3 | D3 | S1 | Unobstructed and unobstructed | 100% |
| 2 | L4 | D4 | S2 | Creep movement | 65% |
| 3 | L5 | D5 | S3 | Blocking | 40% |
| 4 | L6 | D6 | S4 | Severe blockage | 10% |
TABLE 1 section information Table
The unfinished sections are L3, L4, L5 and L6, the traffic states corresponding to the sections are smooth, slow, blocked and severely blocked, and the total remaining time is T; the speed ratios relative to the standard speed V for traffic conditions clear, creep, blocking and severe blocking were 100%, 65%, 40% and 10%, respectively.
Since each segment of the track returned by navigation is a straight line, the actual distances of each segment are calculated to be D3, D4, D5 and D6 according to the longitude and latitude of the starting point and the ending point of each segment;
assuming the standard speed is V, calculating the standard speed according to the actual distance of each segment, the ratio of each segment relative to the standard speed and the total residual time;
D3/(V*100%)+D4/(V*65%)+D5/(V*40%)+D6/(V*10%)=T，
the standard speed V calculation formula is v=d3/(t×100%) +d4/(t×65%) +d5/(t×40%) +d6/(t×10%);
and calculating the speed and time consumption of each segment according to the actual distance of each segment, the standard speed and the ratio of each segment relative to the standard speed, wherein the speed and time consumption of each segment are shown in the following table 2:
| numbering device | Road section | Speed of speed | When in use |
| 1 | L3 | V3=V | T3=D3/V3 |
| 2 | L4 | V4=V*65% | T4=D4/V4 |
| 3 | L5 | V5=V*40% | T5=D5/V5 |
| 4 | L6 | V6=v*10% | T6=D6/V6 |
TABLE 2 segment speed and time Table
The timing of the end of the analog navigation mode is within 500 meters from the end point, or the long connection signal is received again.
Logic to stop the simulated navigation within 500 meters from the endpoint is as follows: the simulation is carried out in a segment unit, if the distance of the last segment is less than 500 meters, the simulation is directly stopped, and a simulation navigation mode is cut off. The aim is to avoid the user from misidentifying that the vehicle has arrived at the destination but stopping at 500 meters in the simulated navigation mode, so that the user can arrive quickly when the vehicle is identified. Stopping the simulated navigation and waiting for the transfer of the real point in place. If the distance of the last section is greater than 500 meters, the standard speed with the ratio of 10% corresponding to the severe blockage is used as the simulation speed to slowly move forward, the simulation navigation is stopped within 500m from the end point, and the long connection signal is waited for in situ until the long connection signal is received again; and after receiving the long connection signal again, acquiring a real position, and merging the analog position and the real position.
The track combining process after the passenger end long connection recovery signal is divided into the following two cases:
1. the simulated position leads the actual position: stopping the simulated navigation, and waiting for the real position to reach and move forward.
2. The simulated position lags behind the actual position:
assuming that the simulation position is in the L1 segment and the true position has reached the L4 segment at the time of connection recovery of the long connection recovery time, calculating the remaining simulation time T1 'of the L1 segment and the required simulation time T2' of L2 to L4 according to the current simulation speed, then continuing to simulate the traveling of the trolley, and setting the simulation time to reach the current true position as
T(L4)=(T1’+T2’)*65%；
Under normal conditions, the current simulation process is not performed yet, a new true position is pushed, assuming that the pushed true position reaches the L5 section, the simulation time required for calculating L4 to L5 according to the current simulation speed is first T3', and then the simulation time reaching the current true position is set as
T(L5)=(T(L4)+T3’)*65%，
And by analogy, when the simulation is carried out by successive iteration reduction, the speed of the simulated trolley is gradually accelerated until the simulated position and the real position are parallel, then the simulated navigation is stopped, and the real long-connection simultaneous display state is entered.
After the passenger receives the long connection signal again, if the navigation re-plans the route, the real position deviates from the route planned by the navigation before the long connection signal is interrupted, the passenger exits from the simulated navigation state, clears the simulated data and directly displays the latest route track and the real position of the trolley. Because the analog navigation is based on the route data before the signal interruption, the current analog data has failed after the route is switched. In addition, for route switching, the passenger side is provided with corresponding animation prompts, such as a user prompt, a driver switches the route, and the like.
When the positioning callback of navigation stops returning under the condition that the positioning signal is weak at the driver end, the driver end cuts into a simulated navigation mode, and a simulated advancing route is displayed; after the positioning signals are recovered, the parallel rail of the simulated position and the real position of the driver side is carried out, and the real positioning navigation driver and the real display state are returned.
In the navigation process, if the navigation SDK (software development kit) does not return positioning information for three seconds, the simulated navigation mode is cut in.
After the simulated navigation mode is cut in, judging the running speed of the last callback, if the speed is zero, the vehicle is in a stop state, and canceling the simulated navigation; if the speed is non-zero, taking the average value of the last 10 callback running speeds as the simulation speed.
The logic for simulating the navigation distance is as follows: the driver-side simulation navigation only simulates the current section, and after the simulation of the current section is finished, the simulation mode is cut off, and the signal recovery is waited. Because the positioning signal may not be good because of the tunnel or other environment affecting the point location signal, and the length of the tunnel is one segment. If the analog advancing time of the current segment is less than two seconds, the next segment is merged, namely the distance of the analog navigation is the remaining distance of the current segment plus the distance of the next segment.
The track combining process after the positioning and recovering of the driver side signals is as follows:
1. the simulated position leads the actual position: and cutting off the simulated navigation mode, stopping the movement of the simulated trolley, and waiting in situ until the simulated trolley is parallel to the real position.
2. The simulated position lags behind the actual position: and continuously maintaining the simulated navigation mode, accelerating until the simulated navigation mode is synchronized with the real position and then cutting into the real navigation mode, wherein the specific accelerating scheme is similar to that of a passenger side, and is not repeated.
In summary, according to the drift-free simultaneous display method for the weak signal scene in the embodiment of the invention, when the network signal of the passenger side is poor, the passenger side switches into the simulated navigation mode, displays the simulated forward route, and sets the speed and the time according to the segment information; after the network signal is recovered, the parallel rail of the pseudo position and the real position is carried out, and the parallel rail is realized through repeated iteration, so that the abrupt drifting of the trolley at the passenger end is avoided; when the positioning signal of the driver end is weak, the driver end cuts into a simulated navigation mode, displays a simulated advancing route, sets the path and speed of the simulated navigation, and completes the simulation of the current section; after the signals to be positioned are recovered, the parallel rail of the simulation position and the real position is carried out, so that the abrupt drifting of the trolley at the passenger side is avoided.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A drift-free simultaneous display method for a driver-passenger-free scene is characterized in that when a long connection of transmitting position information to a passenger end is disconnected by a driver end under the condition of poor network signals of the passenger end, the passenger end cuts into a simulated navigation mode to display a simulated advancing route; after receiving the long connection signal again, carrying out the parallel rail of the simulation position and the real position of the passenger end, and returning to the real long connection driver and passenger simultaneous display state; when the positioning callback of navigation stops returning under the condition that the positioning signal is weak at the driver end, the driver end cuts into a simulated navigation mode, and a simulated advancing route is displayed; after the positioning signal is recovered, the parallel rail of the simulation position and the real position of the driver end is carried out, the real positioning navigation driver is returned to the synchronous display state, and when the passenger end carries out the parallel rail of the simulation position and the real position, if the simulation position leads the real position, the parallel rail is moved forward after the real position reaches the simulation position; if the simulation position is behind the real position, the simulation time is shortened, so that the simulation trolley is uniformly accelerated according to the current travelling speed until the simulation trolley is parallel to the real position: if the simulation position is in the L1 section and the real position has reached the L4 section when the long connection is restored, calculating the remaining simulation time T1 'of the L1 section and the required simulation time T2' of L2 to L4 according to the current simulation speed, then continuing to simulate the forward movement of the trolley, and setting the simulation time reaching the current real position as T (L4) = (T1 '+T2')65%; if the current simulation process is not performed yet, new real position pushing is received, the pushed real position is assumed to reach the L5 section, simulation time required by calculating L4 to L5 is firstly T3 'according to the current simulation speed, then simulation time reaching the current real position is set to be T (L5) = (T (L4) +T3')65%, simulation speed is gradually accelerated when simulation is reduced through successive iteration, simulation navigation is stopped until the simulation position and the real position are combined, a real long connection driver and rail sharing state is entered, and when the driver side performs rail sharing of the simulation position and the real position, if the simulation position leads the real position, the driver side rail sharing is continued after the real position reaches the simulation position; if the simulation position is behind the real position, the simulation time is shortened, so that the simulation trolley is uniformly accelerated according to the current travelling speed until the simulation trolley is parallel to the real position.
2. The drift-free simultaneous display method for a weak signal scene according to claim 1, wherein when the passenger side switches into the simulated navigation mode, the simulated forward route is in units of a section of the navigation route planning returned from the driver side to the passenger side before the long connection is disconnected, and the speed of forward travel of each section is set according to the length of the section and the traffic condition, and specifically comprises the following steps:
s11: the passenger side obtains the section information of the navigation route planning returned by the driver side for the last time before the long connection is disconnected, the section information comprises unfinished sections, the longitude and latitude of the starting point and the finishing point of each section, the traffic condition of each section and the planned total residual time, the unfinished sections are L3, L4, L5 and L6 sections, the traffic conditions corresponding to each section are smooth, slow running, blocking and serious blocking respectively, and the total residual time is T;
s12: calculating the actual distances of each segment to be D3, D4, D5 and D6 according to the longitude and latitude of the starting point and the ending point of each segment;
s13: setting a speed ratio of each segment relative to a standard speed V according to the traffic condition of each segment; the corresponding speed ratios of the unobstructed traffic condition, the creep, the blockage and the serious blockage are 100%, 65%, 40% and 10% respectively;
s14: calculating a standard speed according to the actual distance of each segment, the ratio of each segment relative to the standard speed and the total residual time; obtaining a standard speed V calculation formula as v=d3/(t×100%) +d4/(t×65%) +d5/(t×40%) +d6/(t×10%);
s15: calculating the speed and the time V3=V, T3=D3/V3 of each segment according to the actual distance of each segment, the standard speed and the ratio of each segment relative to the standard speed; v4=v65%, t4=d4/V4; v5=v40%, t5=d5/V5; v6=v×10%, t6=d6/V6.
3. The method for simultaneous display of drift-free drivers and passengers in a weak signal scene as claimed in claim 2, wherein when the passenger side switches into the analog navigation mode, if the long signal is received again before the analog forward path reaches the last section, the real position is obtained, and the merging of the analog position and the real position is performed; if the simulated forward path reaches the last section and the long signal is not received again, judging the distance of the last section, if the distance of the last section is smaller than 500m, stopping simulated navigation, and waiting for the recovery of the long connection signal in situ until the long connection signal is received again; if the distance of the last section is greater than 500m, the standard speed with the ratio of 10% corresponding to the severe blockage is used as the simulation speed to slowly move forward, the simulation navigation is stopped within 500m from the end point, and the long connection signal is waited for in situ until the long connection signal is received again; and after receiving the long connection signal again, acquiring a real position, and merging the analog position and the real position.
4. The drift-free simultaneous display method according to claim 1, wherein the driver side switches into a simulated navigation mode to acquire the last travel speed returned before stopping the navigation positioning callback, and if the last travel speed is zero, the vehicle is indicated to be in a stopped state, and the simulated navigation is canceled; if the last driving speed is not zero, acquiring current segment information returned before stopping navigation positioning callback, and calculating the remaining distance of the current segment; then acquiring the running speed of the last 10 times of callback before stopping navigation positioning callback, and calculating an average value as a simulation speed; stopping the simulated navigation after the simulated navigation path is ended, and waiting for the navigation positioning signal to recover; and after the navigation positioning signals are recovered, obtaining the real position, and merging the simulated position and the real position.
5. The drift-free simultaneous display method according to claim 4, wherein when a driver side is switched into a simulated navigation mode, calculating the simulated advancing time of the current section through the remaining distance and the simulated speed of the current section, if the simulated advancing time of the current section is less than two seconds, merging the remaining distance of the current section into the next section, taking the distance of the remaining distance of the current section plus the distance of the next section as the simulated navigation distance, otherwise taking the remaining distance of the current section as the simulated navigation distance.
6. The drift-free simultaneous display method for a weak signal scene as claimed in claim 1, wherein if the long connection between the driver side and the passenger side is not reconnected successfully within two callback times, the long connection between the driver side and the passenger side is confirmed to be disconnected, and the passenger side is switched into an analog navigation mode; wherein the callback time of the long connection is set to three seconds; and in the navigation process of the driver end, if the navigation SDK does not return the positioning information for three seconds, confirming that the navigation positioning callback stops returning, and switching into a simulated navigation mode by the driver end.
7. The method for simultaneous display of no drift in a weak signal scenario of claim 1, wherein after the passenger receives the long connection signal again, if the navigation re-plans the route, the real position deviates from the route planned by navigation before the long connection signal is interrupted, the simulated navigation state is exited, the simulated data is cleared, and the latest route track and the real position are directly displayed.
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| CN114489918A (en) * | 2022-04-15 | 2022-05-13 | 北京京东乾石科技有限公司 | Data display method, system and device |
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