TWI439674B - Navigation path locking method and navigation system thereof - Google Patents

Description

Navigation locking method and navigation system thereof

The invention relates to a navigation locking method and a navigation system thereof, in particular to a navigation locking method with a locking road type mechanism and a navigation system thereof.

At present, the Global Positioning System (GPS) has the characteristics of high global coverage, all-weather (not affected by weather), three-dimensional fixed point, positioning, timing and movable positioning, which has led to a wide range of global satellite positioning systems. It can be used in various fields, such as precise timing, observatory observation, communication system base station, exploration mapping, satellite navigation, global positioning or construction of roads, bridges or tunnels. Global positioning can also be used for vehicle anti-theft systems, anti-lost systems for children and special populations, or electronic maps. The range of GPS applications that can be applied is quite broad and widespread, and is closely related to people's daily lives.

Further, the Global Positioning System, also known as the Global Positioning System, is a satellite navigation system for medium-distance circular orbits. Among them, satellite navigation can also be divided into weapon navigation, vehicle navigation, ship navigation and aircraft navigation. Vehicle navigation systems are more commonly used by the public today, such as trail preview and planning, family travel, business trips, visiting relatives, the public, or cargo transportation. Users can effectively master the established itinerary to reduce time. Unnecessary spending, avoiding lateness and causing business The loss of the above, to prevent the unpleasantness caused by the delay of the journey time.

However, the global positioning system may cause errors in the positioning process, and the source of the error may be affected by factors such as the position of the satellite, the location of the to-be-set point, the receiving device, the atmospheric environment, the time of receiving the signal, or the geographical environment. When the global positioning signal is poorly received, the signal receiving device cannot provide the user with accurate navigation services. In order to improve the accuracy of the global positioning system, the prior art uses a Differential Global Positioning System to correct the error of the global positioning system, which utilizes the known reference coordinate points in the vicinity and adds an instantaneous error value. The consideration of its own coordinate operation, in turn, corrects the error of the global satellite positioning system.

The Taiwan Patent Publication No. TW201018881 proposes to calculate the inclination angle signal of the running direction of the vehicle relative to the horizontal ground based on the sensed acceleration signal, thereby determining the type of road the vehicle travels. In addition, the current common technical means is to manually switch the user's method, so that the user can re-select the locked road in the navigation system to the desired navigation path. Another common technical means is that the user can pre-set the weight of the road type, so the navigation system sets the road type according to the preference of the user. However, in the above-mentioned prior art, the problem that the navigation lock system is easy to judge errors is still not completely solved. If the position of the to-be-set point is locked on the road of misjudgment, it is easy to cause trouble and inconvenience to the user. For this reason, for the navigation lock determination method, a more practical design is needed to assist.

Therefore, as described above, the navigation locking method of the present invention is adopted in order to improve the quality of the navigation system locking by the lack of the prior art, thereby preventing the misjudgment of the navigation system locking, causing confusion of the user, and thus the user can reduce Unnecessary time spent, and reducing the chance of being late, reaching the destination smoothly and safely.

In view of the above-mentioned problems of the prior art, one of the objects of the present invention is to provide a navigation locking method in order to overcome the problem that the prior art cannot effectively assist the user in navigating the road lock.

In order to achieve the above object, the present invention provides a navigation locking method, which is suitable for a navigation system. The navigation system performs a road type determination program in advance to set a locking parameter to represent a value of a road type. The navigation locking method proposed by the present invention includes The following steps: receiving the signal of the global positioning system, and analyzing the current location according to the map information; determining whether there is another road type different from the road type indicated by the lock parameter in the error range of the current location; if another road type exists Then, it is determined whether there is an alternating track within the error range; and if there is no alternating track within the error range, the current position is located in the map information according to the locking parameter, and is positioned on the road corresponding to the road type.

Wherein, if there is no other road type within the error range, the current position is directly located in the map information according to the locking parameter, and is located on the road corresponding to the road type.

Wherein, the communication channel is one that can be connected to another road type by the first road type.

Wherein, if there is an exchange channel in the error range, the lock parameter is set to represent the value of the unknown road type, and the navigation system locates the current location in the map information and locates on the road corresponding to another road type; The signal of the global positioning system is continuously received within the preset time interval; and whether the current position within the preset time interval is determined to be on a road conforming to another road type, and there is no parallel road type within the error range. The matching road, if it is, sets the lock parameter to a value that represents another road type.

The road class judging program judges the moving path within the preset time interval according to the signal of the global positioning system, and searches for the road type corresponding to the moving path in the map information.

The road type judging program determines the road type by the navigation system receiving the input signal of the user.

In the step of receiving the signal of the global positioning system, if the signal of the global positioning system is lost, the value of the corresponding road type in the locking parameter is maintained within the preset retention time, and the signal of the global positioning system is to be re-received. After that, the current position is directly located in the map information according to the lock path parameter, and is located on the road that matches the road type.

Among them, road types include flat roads and elevated roads.

In addition, the present invention further provides a navigation system including: a storage unit, a signal receiving unit, and an arithmetic unit. The storage unit stores map information and lock parameters; the signal receiving unit receives the signal of the global positioning system; the calculation unit executes the road type determination program in advance to set the lock parameter to represent the value of the road type, and then executes the navigation lock program. The navigation locking program receives the signal of the global positioning system by the signal receiving unit, and the calculation unit analyzes the current position according to the signal of the global positioning system and the map information, and then determines whether there is another difference in the error range of the current position. For a road type, if another road type exists, the calculation unit further determines whether there is an exchange channel within the error range. If there is no communication channel, the calculation unit locates the current position in the map information according to the lock parameter, and locates the road. The type matches on the road.

Wherein, if there is no other road type in the error range, the calculation unit directly locates the current position in the map information according to the locking parameter, and locates the road type. On the road.

Wherein, if the communication channel exists, the calculation unit sets the lock parameter to represent the value of an unknown road type, and causes the navigation system to locate the current position in the map information and locate the road corresponding to another road type, The signal receiving unit continuously receives the signal of the global positioning system within a preset time interval, and the calculating unit determines whether the current position in the preset time interval is located on a road conforming to another road type, and the error There is no parallel road that matches the road type within the range, and if so, the calculation unit sets the lock parameter to a value representing another road type.

The road type determining program determines, according to the signal of the global positioning system received by the signal receiving unit, the calculating unit determines the moving path within the preset time interval, and searches for the road type corresponding to the moving path in the map information in the storage unit. .

Further, the input unit further includes an input unit for the user to input the signal, and the road type judging program determines the road type by the input signal received by the input unit.

Further, the sound prompting unit further includes an audible prompting user to select a road type.

The method further includes a display unit that can display the lock parameter for the user to know the value of the lock parameter.

Wherein, in the process of receiving the signal of the global positioning system by the signal receiving unit, if the signal receiving unit loses the signal of the global positioning system, the calculating unit maintains the value of the corresponding road type in the locking parameter within the preset retention time, and the signal receiving is received. After the unit receives the signal of the global positioning system again, the calculation unit directly locates the current position in the map information according to the lock parameter, and locates on the road corresponding to the road type.

Wherein, if the preset retention time is exceeded, the calculation unit executes the road type determination program again to determine the road type.

Among them, road types include flat roads and elevated roads.

As described above, the navigation locking method and navigation system thereof according to the present invention may have one or more of the following advantages:

(1) By using the navigation locking method and the navigation system thereof of the present invention, analyzing the type of the locked road can make up for the lack of the prior art to improve the quality of the navigation system locking, and prevent the navigation system from locking the current position to the wrong position. On the road, to avoid confusion caused by users.

(2) By using the navigation locking method and the navigation system thereof according to the present invention, analyzing the type of the locked road can help the user reach the destination at a predetermined time, reducing the probability of being late, and thus the user can reduce the unnecessary time. Cost.

(3) By the navigation locking method and the navigation system thereof of the present invention, the type of the locked road is analyzed, and the user can effectively grasp the predetermined itinerary, thereby preventing the unpleasantness caused by the delay of the travel time.

1‧‧‧Navigation system

11‧‧‧ storage unit

111‧‧‧Map Information

112‧‧‧Lock parameters

12‧‧‧ calculus unit

13‧‧‧Signal receiving unit

131‧‧‧Global Positioning System Signal

14‧‧‧ Input unit

15‧‧‧Display unit

16‧‧‧Audio prompt unit

32‧‧‧ Tunnel

20‧‧‧User current location

21, 33‧‧‧ Plane road

22‧‧‧ Error range

23, 31‧‧ ‧ elevated road

S41~S44, S451, S452, S46~S48, S51~S54, S551, S552, S56~S58, S61~S64, S651, S652, S66~S68‧‧

1 is a block diagram of a navigation system of the present invention; FIG. 2 is a schematic diagram of a first use scenario of the navigation system of the present invention; and FIG. 3 is a schematic diagram of a second use scenario of the navigation system of the present invention; The figure is a flowchart of the first embodiment of the navigation locking method of the present invention; FIG. 5 is the first flow of the second and third embodiments of the navigation locking method of the present invention. Figure 6 and Figure 6 are a second flow chart of the second and third embodiments of the navigation locking method of the present invention.

Please refer to FIG. 1, which is a block diagram of the navigation system of the present invention. In the figure, the navigation system 1 includes a storage unit 11, a calculation unit 12, and a signal receiving unit 13. In the navigation system 1, the signal 131 of the global positioning system is received by the signal receiving unit 13, and the signal 131 of the global positioning system includes information such as longitude, latitude and altitude, wherein the calculating unit 12 receives the longitude and latitude according to the signal receiving unit 13. According to the two-dimensional positioning, or according to signals of three or more global (satellite) positioning systems received by the signal receiving unit 13, the longitude, latitude and altitude are calculated in three dimensions. The storage unit 11 stores map information 111, which includes different types of roads, interchanges, terrain, longitude, and latitude. The calculation unit 12 can correspond to the map information 111 according to the signal 131 of the global positioning system. The storage unit 11 further includes a lockout parameter 112 that represents a particular type of road, such as a flat road, an elevated road, a highway, a fast road, and the like.

The calculation unit 12 executes a road type determination program in advance, and the road type determination program sets the value of the lock path parameter 112 in accordance with the current road type. In the navigation lock program, the calculation unit 12 analyzes the coordinates of the positioning in the signal 131 of the global positioning system received by the signal receiving unit 13, such as longitude and latitude, to analyze the coordinates of the current position. The calculation unit 12 determines whether there is a road type different from the lock parameter 112 according to the coordinates of the current position and corresponding to the map information 111 within the error range of the signal 131 of the global positioning system. If there is a road type different from the lock parameter 112, it is further determined whether there is an interchange that can be matched with the road type of the lock parameter 112. The road is connected to a road that is different from the road type of the lock parameter 112. If there is no communication path within the error range of the signal 131 of the global positioning system, it can be known that the user does not switch from the road type of the lock parameter 112 to the road type different from the lock parameter 112, according to the lock. The road parameter 112 maps the current location in the map information 111 to the road that matches the road type. The error range is the limitation of the Global Positioning System signal 131, which may be affected by altitude, buildings and plants, and may vary from a radius of 10 meters or 20 meters.

Compared with the prior art, the navigation system of the prior art, because of the lack of the locking parameter, may be instantaneously positioned from the current road type to another different road type due to the error of the global positioning system signal 131. For example, if the user is driving on a flat road and there is an elevated road within the error range of the signal 131 of the global positioning system, even if there is no existing communication channel at this time, it is possible to instantaneously fly the elevated road from the flat road. The irrational phenomenon has caused users trouble. According to the present invention, the navigation system 1 is assisted by the lockout parameter 112 so that the navigation system 1 is not affected by the error of the signal 131 of the global positioning system, and is instantaneously located from the current road to another different type of road. For example, if the user is traveling on a flat road and there is an elevated road within the error range of the global positioning system signal 131, the system will further determine whether there is a plane road switching to the elevated road interchange within the error range. According to the above conditions, there is no communication path in the error range, and the user cannot instantaneously move to the elevated road, so the navigation system 1 will position the user on the flat road.

In addition, in this embodiment, if it is determined that there is no road type different from the lock parameter 112 in the error range, the calculation unit 12 can directly locate the current position in the map information 111 according to the lock parameter 112, and locate and lock the road. The road type of parameter 112 matches On the road.

In the present embodiment, if there is a road type different from the lock path parameter 112 and the existence of the cross track in the error range, the calculation unit 12 can set the lock parameter 112 to represent the value of the unknown road type, and The current location is in the map information 111 and is located to another different type of road. Furthermore, the signal receiving unit 13 continuously receives the signal 131 of the global positioning system in a predetermined time interval, and determines whether the current position is located on another different type of road in the preset time interval through the calculating unit 12, And there are no parallel roads that match the previous road type within the error range. If so, the calculation unit 12 sets the lock parameter 112 to represent the value of another different type of road. There are a variety of ways to confirm the type of the road in front of it. For example, according to the signal 131 of the global positioning system, it is determined that one of the movement paths is within a preset time interval, and the map information 111 is found to be consistent with the movement path. Road to determine the type of road. Therefore, the road type judging program of the present invention can be implemented in accordance with the above. In addition, the navigation system 1 can further include an input unit 14 for the user to directly input or select a road type. The input unit 14 may be a button or a touch screen. The system can update the lock parameter 112 parameters according to the user's input. The navigation system 1 can also include an audible prompt unit 16 that can broadcast sound information to prompt the user to select a road type to set the lock parameter 112 parameters. In addition, the display unit 15 may be included, such as a liquid crystal screen, a plasma screen or a light-emitting diode (LED) screen, or a display device with a touch function. The navigation system 1 can transmit the above-mentioned map information 111 and possible road type options to the display unit 15 for the user to know the current current location and select the current road type.

Please refer to FIG. 2, which is a schematic diagram of a first use scenario of the navigation system of the present invention. In the figure, the user's current position is 20 on a flat road. And in the navigation system 1 Within the error range 22, there is another elevated road 23, and the planar road 21 will gradually be parallel to the elevated road 23. According to the conventional technical means, under this condition, the navigation system 1 may change the user originally on the flat road 21 to the elevated road 23. The navigation system 1 provided by the present invention, wherein the storage unit 11 is provided with a lock parameter 112, and the value of the lock parameter 112 can be set to represent the value of the plane road via the road type judgment program. When the signal receiving unit 13 of the navigation system 1 receives the presence of the elevated road 23 within the error range 22 of the signal 131 of the global positioning system, the calculation unit 12 determines whether there is a plane road 21 leading to the overhead within the error range 22 of the signal. The intersection of road 23 exists. In this example, since there is no interchange in the error range 22, the user cannot switch from the plane road 21 to the elevated road 23, and the calculation unit 12 continues to position the user on the plane according to the road type marked by the lock parameter 112. On the road 21.

In addition, in the actual use case, the signal 131 of the global positioning system may cause poor reception of the signal receiving unit 13 due to factors such as tunnel shielding, terrain limitation or climate, and thus the navigation system 1 cannot accurately determine the current location of the user. According to the navigation system 1 of this embodiment, the calculation unit 12 maintains the value of the lock parameter 112 for a predetermined period of time. After the signal receiving unit 13 receives the signal 131 of the global positioning system again, the calculating unit 12 can locate the current position on the road corresponding to the road type of the locking parameter 112. If the signal receiving unit 13 loses the global positioning system signal 131 for more than the preset retention time, the calculating unit 12 executes the road type determining program again, and the user can input the signal through the input unit 14 to set the road type of the locking parameter 112. .

Taking FIG. 3 as an example, it is a schematic diagram of the second usage scenario of the navigation system of the present invention. In the figure, the user travels on the elevated road 31 and passes through the tunnel 32 on the way. in During the passage of the tunnel 32, the signal receiving unit 13 will lose the signal 131 of the global positioning system. If the user can re-receive the global positioning system signal 131 through the tunnel 32 within the preset retention time range, since the system still maintains the value of the corresponding elevated road type 31 in the locking parameter 112, according to the locking method Parameter 112, the current position is located on the road that matches the road type, that is, on the elevated road 31. Accordingly, according to the present invention, the user position is not mistakenly positioned on the flat road 33 when the user re-positions the tunnel 32.

As described above, the navigation system 1 has the technical feature of setting the lock parameter 112 in the storage unit 11, so that when the signal receiving unit 13 loses the signal, the lock parameter 112 stored in the storage unit 11 of the navigation system 1 can help When the user re-receives the signal at the signal unit 13, the navigation system 1 is prevented from positioning the current location on the wrong road.

In the above embodiment, if the signal receiving unit 13 loses the global positioning system signal 131 and exceeds the preset retention time, the calculating unit 12 executes the road type determining program again, and the user can input the signal through the input unit 14 to set the locking parameter. 112 road type. The road type judging procedure can be implemented as described above, and will not be described here.

Please refer to FIG. 4, which is a flowchart of the first embodiment of the navigation locking method of the present invention. The navigation locking method is applicable to a navigation system and includes the following steps.

First, in step S41, the navigation system executes a road type determination program in advance to set the lock parameter to a value representing the road type.

Next, step S42 is performed to receive the signal of the global positioning system, and analyze the current location according to the map information.

Then, step S43 is performed to determine whether there is a difference in the error range of the current position. Another road type for this road type.

If there is no road type different from the road type in the error range of the current position, that is, only the road of the same type as the lock parameter value in the error range, step S451 is performed, and the current position is determined according to the lock parameter. In the map information, locate on the road that matches the road type. Next, the process returns to step S42 to re-receive the signal.

If there is another road type different from the road type in the error range of the current position, that is, the road type having the difference of the lock parameter in the error range exists, if it is further determined whether there is an interchange, step S44 is performed. It is judged whether there is an exchange track within the error range.

If there is an interchange in the error range, so that the navigation system cannot confirm whether the user is connected to the different type of road via the communication path within the error range, step S452 is performed to set the lock parameter to a value representing the unknown road type, and The navigation system is positioned in the map information to locate on a road that matches another road type.

Then, step S46 is performed to continuously receive the signal of the global positioning system within a preset time interval.

Next, step S47 is executed to determine whether the current location within the preset time interval is located on a road that matches another road type, and there is no parallel road that matches the road type within the error range.

If yes, step S48 is performed to set the lock parameter to a value representing another road type. Next, the process returns to step S41 to execute the road type determination program.

If there is no cross track within the error range, it means that it is different from the lock parameter in the error range. The value type road exists, but since there is no communication path for the user to drive to another type of road, it can be confirmed that the user is driving on the same road type as the road type recorded by the lock parameter, and then step S451 is performed according to The lock parameter maps the current location to the map information and locates on the road that matches the road type. Next, the process returns to step S42 to re-receive the signal.

In addition, the signal of the global positioning system may cause poor reception of the receiving module due to factors such as tunnel shielding, terrain limitation or climate, and the navigation system cannot accurately determine the current location of the user. According to the navigation locking method of this embodiment, if the signal of the global positioning system is lost and the preset retention time is performed, the step S46 is executed to maintain the value of the corresponding road type in the locking parameter. Re-receive the signal from the GPS. Next, step S451 is executed, and the current location is located in the map information according to the lock path parameter, and is located on the road corresponding to the road type, and the subsequent steps are not described again.

If the signal of the lost global positioning system exceeds the preset retention time when step S42 is performed, step S452 is performed to issue the request signal. Next, the process returns to step S41 to execute the road type determination program again.

The road type judging program may determine, according to the signal of the global positioning system, a moving path within a preset time interval, and find a road corresponding to the moving path in the map information to determine a road type. In addition, the user can input a signal to the navigation system through the input unit to execute the road type determination program, thereby determining the road type of the lock parameter. The value of the lockout parameter represents a specific type of road, such as a flat road or an elevated road.

As described above, the navigation locking method of the present invention can make up for the lack of the prior art. Improve the quality of the navigation system lock, and thus prevent the misunderstanding of the navigation system lock, resulting in user inconvenience.

Please refer to FIG. 5 and FIG. 6 together, which is a flowchart of the second embodiment of the navigation locking method of the present invention. In the figure, if the user is located on a flat road, the navigation locking method and the navigation system therefor according to the present invention comprise the following steps.

First, in step S51, the navigation system executes the road type determination program in advance to set the lock parameter to a value representing the plane road type.

Then, step S52 is executed to receive the signal of the global positioning system, and analyze the current location according to the map information.

Next, step S53 is performed to determine whether there is an elevated road within the error range of the current location.

If there is no elevated road within the error range of the current position, that is, there is only a plane road within the error range, and the road type corresponding to the lock parameter value record is matched, then step S551 is performed, and the current position is in the map information according to the lock path parameter. , positioned on a road that matches the type of flat road. Next, the process returns to step S52 to re-receive the signal.

If there is an elevated road within the error range of the current position, that is, a road having a road type different from the value of the lock parameter within the error range, it is necessary to further determine whether the user should continue to locate the flat road of the map information, then proceed In step S54, it is determined whether there is an exchange path that can be switched from the flat road to the elevated road within the error range.

If there is an interchange path that can be connected to the elevated road by the plane road within the error range of the current position, the navigation system cannot confirm whether the user is within the error range. The flow path travels to the elevated road, so step S552 is executed to set the lock parameter to a value representing an unknown road type, and the navigation system locates the current position in the map information and locates on the elevated road.

Then, step S56 is performed to continuously receive the signal of the global positioning system within a preset time interval.

Next, step S57 is executed to determine whether the current position in the preset time interval is located on the road corresponding to the elevated road type, and there is no parallel plane road within the error range.

If yes, step S58 is executed to set the lock parameter to a value representing the type of the elevated road. Next, the process returns to step S51 to execute the road type determination program.

If there is no communication channel within the error range for the user to connect to the elevated road from the plane road, step S551 is performed, and the current position is located in the map information according to the locking parameter, and is located on the road corresponding to the plane road type. Next, the process returns to step S52 to re-receive the signal.

However, in actual use cases, the signal of the global positioning system may cause poor reception of the signal receiving unit due to factors such as tunnel shielding, terrain limitation or climate, and the navigation system cannot accurately determine the current location of the user. According to the navigation locking method of the embodiment, if the signal of the global positioning system is lost when step S52 is performed, and the value of the corresponding planar road type is maintained within a preset retention time, the value of the corresponding planar road type is to be re-received. The signal of the global positioning system. Next, step S551 is executed, and the current position is located in the map information according to the lock path parameter, and is located on the road corresponding to the plane road type, and the subsequent steps are not described again.

If the signal of the lost global positioning system exceeds the preset reservation when step S52 is executed, If yes, proceed to step S552 to issue a request signal. Next, the process returns to step S51 to execute the road type determination program again.

In the embodiment, when the user is driving on a flat road, if there is an elevated road within the signal error range of the global positioning system, but there is no communication lane for the user to travel to the existence of the elevated road, according to the present invention The navigation locking method is provided to avoid the unreasonable situation that the navigation path is misjudged on the elevated road due to the signal error of the global positioning system.

Please refer to FIG. 5 and FIG. 6 , which are flowcharts of the third embodiment of the navigation locking method of the present invention. In the figure, if the user is located on an elevated road, the navigation locking method and the navigation system therefor according to the present invention comprise the following steps.

First, in step S61, the navigation system executes a road type determination program in advance to set the lock parameter to a value representing the elevated road type.

Then, step S62 is executed to receive the signal of the global positioning system, and analyze the current location according to the map information.

Next, step S63 is performed to determine whether there is a plane road within the error range of the current position.

If there is no plane road within the error range, that is, the road that the user travels matches the road type in the lock parameter, step S651 is performed, and the current position is located in the map information according to the lock parameter, and is positioned to match the elevated road type. On the road. Then, the process returns to step S62 to re-receive the signal.

If there is a flat road within the error range of the current position, it means that the road has a road type different from the road lock parameter within the error range, and further determination is made whether the road If the user is continuously positioned on the plane road in the map information, step S64 is performed to determine whether there is an exchange path that can be switched from the elevated road to the plane road within the error range.

If there is an interchange path within the error range, so that the navigation system cannot accurately determine whether the user is connected to the plane road by the elevated road, proceed to step S652, set the lock parameter to a value representing an unknown road type, and make the navigation The system locates the current location in the map information and locates it on a flat road.

Then, step S66 is performed to continuously receive the signal of the global positioning system within a preset time interval.

Next, step S67 is executed to determine whether the current position in the preset time interval is located on a road whose plane road type matches, and there is no parallel elevated road within the error range.

If yes, step S68 is executed to set the lock parameter to a value representing the plane road type. Next, the process returns to step S61 to execute the road type determination program.

If there is no communication channel for the user to travel from the elevated road to the plane road within the error range, step S651 is performed, and the current position is located in the map information according to the locking parameter, and is located on the road corresponding to the type of the elevated road. Next, the process returns to step S62 to re-receive the signal.

However, in actual use cases, the signal of the global positioning system may cause poor reception of the signal receiving unit due to factors such as tunnel shielding, terrain limitation or climate, and the navigation system cannot accurately determine the current location of the user. According to the navigation locking method of this embodiment, if the signal of the global positioning system is lost when step S62 is performed, and the value of the corresponding elevated road type in the locking parameter is maintained within a preset retention time, The signal of the global positioning system is to be re-received. Then, step S651 is executed, and the current position is located in the map information according to the lock path parameter, and is located on the road corresponding to the type of the elevated road, and the subsequent steps are not described again.

If the signal of the lost global positioning system exceeds the preset retention time when step S62 is performed, then step S652 is performed to issue a request signal. Next, the process returns to step S61 to execute the road type determination program again.

As described in the above embodiments, when the user is driving on an elevated road, if there is a flat road within the signal error range of the global positioning system, but there is no communication path for the user to travel to the plane road, according to the present invention The navigation locking method is provided to avoid the unreasonable situation that the navigation path is misjudged on the plane road due to the signal error of the global positioning system.

In summary, the navigation locking method and the navigation system provided by the invention can make up for the lack of the prior art, improve the quality of the navigation system locking, prevent the misunderstanding of the navigation system locking, and cause confusion for the user, and Help users to reach the destination at the scheduled time, reducing the chance of being late, so that the user can reduce the unnecessary time in the time, and can avoid the user manually switching the navigation route, causing the user to drive safely, the user can effectively Master the established itinerary and get to your destination smoothly and safely.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

S41~S44, S451, S452, S46~S48‧‧‧ steps

Claims (20)

A navigation locking method is applicable to a navigation system, which pre-executes a road type determining program to set a locking parameter to represent a road type value, the method comprising the steps of: receiving a global positioning system signal And analyzing a current location according to a map information; determining whether there is another road type different from one of the road types within one of the error ranges of the current location; and if the other road type exists, determining the error further Whether there is a communication channel in the range; and if the communication channel does not exist, the current location is located in the map information according to the locking parameter, and is located on a road that matches the road type. The navigation locking method according to claim 1, wherein if the another road type does not exist in the error range, the method further includes the following steps: the current location is in the map information according to the locking parameter, Navigate to the road that matches the road type. The navigation locking method according to claim 1, wherein the communication channel is one that can be connected to the other road type by the road type. The navigation locking method according to claim 3, wherein if the communication path exists, the method further includes the step of: setting the locking parameter to a value representing an unknown road type, and causing the navigation system to The current location is in the map information, and is located on a road that matches the other road type; Continuously receiving the signal of the global positioning system within a preset time interval; and determining whether the current location within the preset time interval is located on the road corresponding to the other road type, and within the error range There is no parallel road that matches the road type, and if so, the lock parameter is set to represent the value of the other road type. The navigation locking method according to claim 1, wherein the road type determining program determines, according to the signal of the global positioning system, a moving path within a preset time interval, and in the map information Find the road type that matches the move path. The navigation locking method according to claim 1, wherein the road type determining program determines that the road type is determined by the navigation system receiving a user input signal. The navigation locking method according to claim 1, wherein in the step of receiving the signal of the global positioning system, if the signal of the global positioning system is lost, the locking parameter is maintained for a preset retention time. Corresponding to the value of the road type, after receiving the signal of the global positioning system, the current location is directly in the map information according to the locking parameter, and is located on the road corresponding to the road type. The navigation locking method of claim 7, wherein if the preset retention time is exceeded, a request signal is sent to cause the navigation system to perform the road type determination procedure again to determine the road type. The navigation locking method according to claim 1, wherein the road type comprises a flat road and an elevated road. A navigation system includes: a storage unit for storing a map information and a lock path parameter; a signal receiving unit for receiving a signal of a global positioning system; and a calculation list And executing a road type judging program in advance to set the lock parameter to a value representing a road type, and then executing a navigation lock program, the navigation lock program receiving the signal of the global positioning system by the signal receiving unit The calculation unit analyzes a current location according to the signal of the global positioning system and the map information, and further determines whether there is another road type different from one of the road types within one error range of the current location, and if the other If the road type exists, the calculation unit further determines whether there is an alternating track within the error range. If the communication path does not exist, the calculating unit locates the current position in the map information according to the locking parameter, and locates The road type matches one of the roads. The navigation system of claim 10, wherein if the other road type does not exist in the error range, the calculation unit directly locates the current location in the map information according to the locking parameter, and locates The road type matches on the road. The navigation system of claim 10, wherein the communication channel is one that can be connected to the other road type by the road type. The navigation system of claim 12, wherein if the communication channel exists, the calculation unit sets the lock parameter to a value representing an unknown road type, and causes the navigation system to The map information is located on a road that matches the other road type, and the signal receiving unit continuously receives the signal of the global positioning system within a preset time interval, and the calculation unit determines the preset time. Whether the current position in the interval is located on the road corresponding to the other road type, and there is no parallel road corresponding to the road type within the error range, and if so, the calculation unit sets the locking parameter Set to represent the value of this other road type. The navigation system of claim 10, wherein the road type determining program is based on the signal of the global positioning system received by the signal receiving unit, The calculation unit determines one of the movement paths in a predetermined time interval, and searches for the road type corresponding to the movement path in the map information in the storage unit. The navigation system of claim 10, further comprising an input unit for the user to input an input signal, wherein the road type determining program determines the input signal received by the input unit Road type. The navigation system of claim 15, further comprising an audible prompt unit for prompting the user to select the road type. The navigation system of claim 15, further comprising a display unit for displaying the lock parameter for the user to know the value of the lock parameter. The navigation system of claim 10, wherein, in the process of receiving the signal of the global positioning system, the signal receiving unit loses the signal of the global positioning system in a preset retention time The calculation unit maintains the value of the road type corresponding to the lock parameter. After the signal receiving unit receives the signal of the global positioning system again, the calculation unit directly maps the current position to the map information according to the lock parameter. Medium, located on the road that matches the road type. The navigation system of claim 18, wherein if the preset retention time is exceeded, the calculation unit executes the road type determination procedure again to determine the road type. The navigation system of claim 10, wherein the road type comprises a flat road and an elevated road.