CN104897162A - Elevated road navigation method and vehicle mounted device - Google Patents
Elevated road navigation method and vehicle mounted device Download PDFInfo
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- CN104897162A CN104897162A CN201410074917.6A CN201410074917A CN104897162A CN 104897162 A CN104897162 A CN 104897162A CN 201410074917 A CN201410074917 A CN 201410074917A CN 104897162 A CN104897162 A CN 104897162A
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- vehicle
- viaduct
- ordinary road
- cartographic information
- separation
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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
- G01C21/3453—Special cost functions, i.e. other than distance or default speed limit of road segments
- G01C21/3461—Preferred or disfavoured areas, e.g. dangerous zones, toll or emission zones, intersections, manoeuvre types, segments such as motorways, toll roads, ferries
Abstract
Relating to the map navigation field, the invention provides an elevated road navigation method and a vehicle mounted device to carry out real-time route navigation on elevated road. The vehicle mounted device (30) comprises: a positioning unit (31), which is used for acquiring the current position of vehicle traveling; an overlap area detection unit (32), which is used for detecting on a predetermined travel route of the vehicle, whether an overlap area of an elevated road and a common road exists ahead of the current position; a map information acquisition unit (33), which is used for acquiring the map information of the elevated road when the overlap area detection unit (32) detects the existence of the overlap area of the elevated road and the common road; a processing unit (34), which is used for judging whether the vehicle is about to drive into the elevated road before the vehicle travels to the area; and a display unit (35), which is used for displaying the map information of the elevated road when the processing unit (34) judges that the vehicle is about to drive into the elevated road. The method and the device provided by the invention are applied to elevated road navigation technology.
Description
Technical field
The present invention relates to field of map navigation, particularly relate to a kind of viaduct air navigation aid and car-mounted device.
Background technology
Japanese Patent Laid-Open 2007-010545 discloses and a kind ofly carries out the car-mounted device of route guidance for vehicle, when vehicle travels when viaduct (or viaduct), first car-mounted device shows the map of ordinary road, then, when the driving trace by analyzing vehicle and speed etc. determine that the road that vehicle travels is viaduct, more shown map is replaced by the map of viaduct from the map of ordinary road.
But, in above-mentioned prior art, need vehicle on viaduct, travel longer distance due to car-mounted device or (long enough driving trace could be formed for analysis) after the time to determine that the road that vehicle travels is viaduct, therefore, there are the following problems: the longer distance from sailing viaduct into or in the time, cannot carry out real-time route guidance.
Summary of the invention
Embodiments of the invention provide a kind of viaduct air navigation aid and car-mounted device, can carry out real-time route guidance in viaduct.
For achieving the above object, embodiments of the invention adopt following technical scheme:
First aspect, provides a kind of car-mounted device, comprising:
Positioning unit, for obtaining the current location that vehicle travels;
Overlapping region detecting unit, for detecting the predetermined travel route at vehicle, whether the front of described current location exists the region overlapping with ordinary road, viaduct;
Cartographic information acquiring unit, when there is the region overlapping with ordinary road, viaduct for detecting when described overlapping region detecting unit, obtains the cartographic information of viaduct;
Processing unit, starts to judge whether vehicle is about to sail viaduct into before described region for travelling at vehicle;
Display unit, for when described processing unit judges that vehicle is about to sail viaduct into, shows the cartographic information of described viaduct.
In conjunction with first aspect, in the first possible embodiment of first aspect, described cartographic information acquiring unit is also for the separation that obtains viaduct and ordinary road;
Described car-mounted device also comprises information of vehicles acquiring unit, and for travelling the first Preset Time to described separation from vehicle, whether the throttle detecting vehicle is strengthened;
Described processing unit specifically for: when described information of vehicles acquiring unit detects that described throttle is strengthened, judge that vehicle is about to sail viaduct into.
In conjunction with the first possible embodiment of first aspect, in the embodiment that the second of first aspect is possible,
Described information of vehicles acquiring unit also for: from vehicle travels the 3rd Preset Time to described separation, to crossing the 4th Preset Time after described separation, whether the air pressure change amount detecting vehicle tyre exceedes preset pressure value;
Described processing unit specifically for: when described information of vehicles acquiring unit detects that described throttle is strengthened and described air pressure change amount exceedes described preset pressure value, judge that vehicle is about to sail viaduct into.
In conjunction with first aspect, in the third possible embodiment of first aspect, described cartographic information acquiring unit is also for the separation that obtains viaduct and ordinary road;
Described car-mounted device also comprises information of vehicles acquiring unit, for travelling the 3rd Preset Time to described separation from vehicle, to crossing the 4th Preset Time after described separation, whether the air pressure change amount detecting vehicle tyre exceedes preset pressure value;
Described processing unit specifically for: when described information of vehicles acquiring unit detects that described air pressure change amount exceedes described preset pressure value, judge that vehicle is about to sail viaduct into.
May arbitrary embodiment to the third in conjunction with the first of first aspect, in the 4th kind of possible embodiment of first aspect, described information of vehicles acquiring unit also for: from vehicle travels the 3rd Preset Time to described separation, to crossing the 4th Preset Time after described separation, whether the tilt angle varied amount detecting vehicle exceedes preset angle angle value;
Described processing unit specifically for: when described information of vehicles acquiring unit detects that described tilt angle varied amount exceedes described preset angle angle value, judge that vehicle is about to sail viaduct into.
In conjunction with the 4th kind of possible embodiment of first aspect, in the 5th kind of possible embodiment of first aspect,
Described positioning unit specifically for: detect that vehicle is current whether has rolled the region overlapping with ordinary road, viaduct away from;
Described processing unit specifically for: when described positioning unit detects that vehicle is current and rolled the region overlapping with ordinary road, viaduct away from, switch the cartographic information being shown as ordinary road.
In conjunction with the 4th kind of possible embodiment of first aspect, in the 6th kind of possible embodiment of first aspect,
Described cartographic information acquiring unit specifically for: travel to the separation of viaduct and ordinary road at vehicle, the cartographic information of acquisition viaduct;
Described display unit is also for the button that shows the cartographic information for switching viaduct and ordinary road.
In conjunction with the first of first aspect or first aspect to the third possible arbitrary embodiment, in the 7th kind of possible embodiment of first aspect, described cartographic information acquiring unit also for:
When the departure place of vehicle is positioned at ordinary road, obtain the cartographic information of ordinary road corresponding to described departure place;
When the departure place of vehicle is positioned at viaduct, obtain the cartographic information of viaduct corresponding to described departure place.
Second aspect, provides a kind of viaduct air navigation aid, comprising:
Obtain the current location that vehicle travels;
Detect on the predetermined travel route of vehicle, whether the front of described current location exists the region overlapping with ordinary road, viaduct;
When detect there is the region overlapping with ordinary road, viaduct time, obtain the cartographic information of viaduct;
Travel at vehicle and started to judge whether vehicle is about to sail viaduct into before described region;
Vehicle current driving in viaduct time, show the cartographic information of described viaduct.
In conjunction with second aspect, in the first possible embodiment of second aspect,
Described traveling at vehicle started to judge whether vehicle is about to sail viaduct into and comprises before described region:
Obtain the separation of viaduct and ordinary road;
From vehicle travels the first Preset Time to described separation, whether the throttle detecting vehicle is strengthened;
When described throttle is strengthened, judge that vehicle is about to sail viaduct into.
In conjunction with the first possible embodiment of second aspect, in the embodiment that the second of second aspect is possible,
Described traveling at vehicle started to judge whether vehicle is about to sail viaduct into and also comprises before described region:
From vehicle travels the 3rd Preset Time to described separation, to crossing the 4th Preset Time after described separation, whether the air pressure change amount detecting vehicle tyre exceedes preset pressure value;
When described throttle is strengthened and described air pressure change amount exceedes described preset pressure value, judge that vehicle is about to sail viaduct into.
The viaduct air navigation aid that the embodiment of the present invention provides and car-mounted device, namely started to judge whether vehicle is about to sail viaduct into before travelling the region overlapping with ordinary road to viaduct at vehicle, therefore, likely travel at vehicle and can determine whether vehicle is about to sail viaduct into before this region, or, can determine that vehicle is current in the short period (can ignore) after vehicle sails viaduct into and whether travel on viaduct.Relative to the longer distance in prior art from sailing viaduct into or cannot carry out real-time route guidance in the time, the scheme according to the embodiment of the present invention can carry out real-time route guidance in viaduct.
Accompanying drawing explanation
The process flow diagram of the viaduct air navigation aid that Fig. 1 provides for the embodiment of the present invention one;
The process flow diagram of the viaduct air navigation aid that Fig. 2 provides for the embodiment of the present invention two;
The structural representation of the car-mounted device that Fig. 3 provides for the embodiment of the present invention three.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The process flow diagram of the viaduct air navigation aid that Fig. 1 provides for the embodiment of the present invention one.The method can be implemented by the car-mounted device with navigation feature, and described car-mounted device for example can be automatic navigator.As shown in Figure 1, described method comprises the steps:
The current location that step 11, acquisition vehicle travel.
After car-mounted device is opened, car-mounted device obtains the current location of vehicle traveling by receiving world locational system (Global Positioning System, GPS) locating information.Car-mounted device can obtain the real time position in the position of vehicle departure place and vehicle travel process.
First car-mounted device obtains the cartographic information near departure place.When the departure place of vehicle is positioned at ordinary road, obtain the cartographic information of ordinary road corresponding to departure place; When the departure place of vehicle is positioned at viaduct, obtain the cartographic information of viaduct corresponding to departure place.Wherein, ordinary road refers to and is laid immediately on ground road, and viaduct refers to the road be erected on ordinary road.
Step 12, detect on the predetermined travel route of vehicle, whether the front of current location exists the region overlapping with ordinary road, viaduct.
Vehicle may run into viaduct at driving process, and viaduct can overlap to form overlapping region (such as viaduct) with ordinary road, and this overlapping region has following features: the spacing in viaduct and ordinary road two road is less than 35 meters; The angle in two road is less than 5 °; When many roads, viaduct and ordinary road respectively at least exist one, such as, when three road superposition distributions, the road being layed in ground of the bottom is ordinary road, road on ordinary road is ground floor viaduct, and the road on ground floor viaduct is second layer viaduct.
In vehicle travel process, car-mounted device can download the cartographic information near current location in real time, and cartographic information can comprise real-time predetermined travel route.On predetermined travel route, described overlapping region can be marked; The cartographic information downloaded can comprise the mark of this overlapping region, and such as, the part that viaduct and ordinary road can be overlapped is labeled as overlapping region starting point, i.e. the separation of viaduct and ordinary road.
In this step, by the cartographic information near current location, car-mounted device judges whether the front of current location exists the region overlapping with ordinary road, viaduct, wherein, overlapping region need be positioned on the predetermined travel route of vehicle.
Step 13, when detect there is the region overlapping with ordinary road, viaduct time, obtain the cartographic information of viaduct.
According to the testing result of step 12, when detect there is the region overlapping with ordinary road, viaduct time, car-mounted device can obtain the cartographic information of this viaduct.And car-mounted device can travel to the separation of viaduct and ordinary road at vehicle, the cartographic information of acquisition viaduct.Being viaduct or namely ordinary road obtains cartographic information relative to not distinguishing road ahead, first detecting in the present embodiment and whether there is overlapping region and obtain cartographic information again and can improve navigation efficiency.
After the cartographic information obtaining viaduct, car-mounted device can show the button of the cartographic information for switching viaduct and ordinary road.Car-mounted device can receive the operation of user to this button, and according to the operation of user, is switched by shown cartographic information between the cartographic information and the cartographic information of ordinary road of viaduct.
When the region overlapping with ordinary road, viaduct not detected, car-mounted device can continue the cartographic information of the ordinary road downloaded near current location.
Step 14, to travel to starting to judge whether vehicle is about to sail viaduct into before described region at vehicle.
Car-mounted device can determine the separation of viaduct and ordinary road according to the cartographic information near current location, then, travel namely start to judge whether vehicle is about to sail viaduct into described separation at vehicle.
In order to travel to starting to judge whether vehicle is about to sail viaduct into before described region at vehicle, any one or its combination in following three kinds of modes can be adopted:
Mode one: from vehicle travels the first Preset Time to separation, whether the throttle detecting vehicle is strengthened.When throttle is strengthened, judge that vehicle is about to sail viaduct into; When throttle is not by increasing, judge that vehicle will travel on ordinary road.
Mode two: from vehicle travels the 3rd Preset Time to separation, to crossing the 4th Preset Time after separation, whether the air pressure change amount detecting vehicle tyre exceedes preset pressure value.When air pressure change amount exceedes preset pressure value, judge that vehicle is about to sail viaduct into; When air pressure change amount does not exceed preset pressure value, judge that vehicle will travel on ordinary road.
Mode three: from vehicle travels the 3rd Preset Time to separation, to crossing the 4th Preset Time after separation, whether the tilt angle varied amount detecting vehicle exceedes preset angle angle value.When tilt angle varied amount exceedes preset angle angle value, judge that vehicle is about to sail viaduct into; When tilt angle varied amount does not exceed preset angle angle value, judge that vehicle will travel on ordinary road.
Can combination one obtain with mode two: from vehicle travels the first Preset Time to separation, whether the throttle detecting vehicle is strengthened.When throttle is strengthened, from vehicle travels the 3rd Preset Time to separation, to crossing the 4th Preset Time after separation, whether the air pressure change amount detecting vehicle tyre exceedes preset pressure value.When detecting that throttle is strengthened and air pressure change amount exceedes preset pressure value, judge that vehicle is about to sail viaduct into; When throttle is not by increasing, judge that vehicle will travel on ordinary road.
Therefore, when there is viaduct and being overlapping with ordinary road, car-mounted device travels at vehicle and namely starts to judge whether vehicle is about to sail viaduct into overlapping region, therefore, whether car-mounted device can pre-determine vehicle and be about to sail viaduct into, or, can determine in the short period after vehicle sails viaduct into that vehicle is current and whether travel on viaduct.And the time shorter (namely time delay is shorter, can ignore) needed for car-mounted device judges according to throttle, air pressure change amount or tilt angle varied amount, therefore, it is possible to the real-time routes realized in viaduct navigates.
Be understandable that, above lifted mode is only example, and those skilled in the art also can judge in conjunction with other modes.
Step 15, vehicle current driving in viaduct time, display viaduct cartographic information.
According to the judged result of step 14, vehicle current driving in viaduct time, car-mounted device can show the cartographic information of viaduct, that is, utilize the cartographic information of viaduct to navigate to vehicle.The concrete display mode of the present invention to cartographic information is not construed as limiting, and preferably, while the cartographic information of overall picture display viaduct, also can show the cartographic information of ordinary road with the form of wicket.
If vehicle is positioned at described overlapping region, but still when travelling on ordinary road, car-mounted device can show the cartographic information of ordinary road, namely utilizes the cartographic information of ordinary road to navigate to vehicle.
After the cartographic information of display viaduct, car-mounted device can detect whether vehicle is current has rolled described overlapping region away from.When detecting that vehicle is current and having rolled described overlapping region away from, switch the cartographic information being shown as ordinary road, and cancel display for switching the button of the cartographic information of viaduct and ordinary road.
According to the viaduct air navigation aid that the embodiment of the present invention one provides, namely started to judge whether vehicle is about to sail viaduct into before travelling the region overlapping with ordinary road to viaduct at vehicle, therefore, likely travel at vehicle and can determine whether vehicle is about to sail viaduct into before this region, or, can determine that vehicle is current in the short period (can ignore) after vehicle sails viaduct into and whether travel on viaduct.Relative to the longer distance in prior art from sailing viaduct into or cannot carry out real-time route guidance in the time, the scheme according to the embodiment of the present invention one can carry out real-time route guidance in viaduct.
The process flow diagram of the viaduct air navigation aid that Fig. 2 provides for the embodiment of the present invention two.Embodiment two is specific embodiments for embodiment one.In order to easy, for what elaborated in embodiment one, repeat no more in embodiment two.The method is implemented by automatic navigator.As shown in Figure 2, described method comprises:
Step 201, beginning.
Vehicle and automatic navigator start, and automatic navigator starts to obtain cartographic information.
Whether step 202, departure place are in viaduct.
When starting to obtain cartographic information, automatic navigator can judge whether the departure place of vehicle is positioned on viaduct, such as, receives user is positioned at ordinary road or viaduct selection to departure place.
The viaduct cartographic information of step 2031, acquisition departure place.
During in the status that judges to set out in viaduct, obtain the cartographic information of viaduct of departure place.
The ordinary road cartographic information of step 2032, acquisition departure place.
During in the status that judges to set out in ordinary road, obtain the cartographic information of ordinary road of departure place.
Step 204, display viaduct or ordinary road cartographic information.
If when departure place is positioned at viaduct, then show the cartographic information of viaduct; If when departure place is positioned at ordinary road, then show the cartographic information of ordinary road.
The current location of step 205, acquisition vehicle.
In the process of moving, automatic navigator obtains the cartographic information near the current location of vehicle and this position, and provides route guidance by showing cartographic information near current location for vehicle.
Whether step 206, detection current location front exist the region overlapping with ordinary road, viaduct.
Automatic navigator, by comparing the cartographic information near the current location of vehicle and this position, judges whether current location front exists the region overlapping with ordinary road, viaduct.For the identification of overlapping region, as described in embodiment one, the mark comprising overlapping region starting point by cartographic information is determined.
Step 2071, acquisition viaduct cartographic information.
According to the testing result of step 206, deposit in overlapping region in case, obtain the cartographic information of the viaduct of this overlapping region.
When current location front exists overlapping region, because vehicle does not travel to viaduct, the cartographic information of ordinary road now still can be shown.In addition, the button " overhead/common " of the cartographic information for switching viaduct and ordinary road can also be shown.Particularly, because display frame is less, a button should not be newly increased, therefore, other temporary transient no buttons can be changed to button " overhead/common ", such as, button " navigation setting " temporarily be changed to " overhead/common " button.Button " overhead/common " can be set to reverse display, that is, when this button is shown as " overhead ", current shown cartographic information is the cartographic information of ordinary road; When button is shown as " common ", current shown cartographic information is the cartographic information of viaduct.When receiving the operation of user's button click " overhead ", automatic navigator is by the current shown cartographic information viaduct that switches to by ordinary road; When receiving the operation of user's button click " common ", automatic navigator is by the current shown cartographic information ordinary road that switches to by viaduct.When in viaduct being multilayer, button can show certain layer of viaduct corresponding to cartographic information.By the setting oppositely shown, only a button need be set, the space shared by button can be reduced, and the setting of support manual switchover can the experience of optimizing user.
Step 2072, display ordinary road cartographic information.
According to the testing result of step 206, in the non-existent situation in overlapping region, continue the cartographic information obtaining ordinary road.
Step 208, obtain the separation of viaduct and ordinary road.
When there is the region overlapping with ordinary road, viaduct, as described in step 206, automatic navigator can determine the separation of viaduct and ordinary road according to the mark of overlapping region starting point.
Whether the throttle of step 209, detection vehicle is strengthened.
When judging whether vehicle is about to sail viaduct into, as a kind of judgment mode, the air pressure change amount combination of mode two (i.e. the mode one in the step 14 of embodiment one with) of the throttle of vehicle and vehicle tyre can be detected simultaneously.
In this step, whether the throttle that can detect vehicle is strengthened.Particularly, when obtaining the separation of viaduct and ordinary road, whether automatic navigator can travel at vehicle the throttle namely starting to detect vehicle to separation and be strengthened.Such as, the first Preset Time to separation is travelled (such as from vehicle, 3 seconds are also had apart from arriving separation) start, or, travel at vehicle the throttle that the first predeterminable range place to separation (such as, apart from separation 20 meters of) namely starts to detect vehicle whether to be strengthened, and can detect until vehicle crosses the second Preset Time after separation (such as always, cross separation 1 second) or the second predeterminable range (such as, having crossed separation 5 meters).
Due to vehicle go up a slope (viaduct has certain gradient) time, even start go up a slope before namely open the throttle to climb, therefore, if above-mentioned time/distance range in detect that throttle is strengthened, then can judge that vehicle is about to sail into or sail viaduct into.To trigger under current location front exists the condition of overlapping region detecting because throttle detects, therefore, it is possible to avoid current location front do not exist described overlapping region and vehicle opened the throttle the erroneous judgement that causes.Due to as a rule, user can select to start to open the throttle before separation in traveling, and therefore, if detect, throttle is strengthened, then judge that vehicle likely sails viaduct into, otherwise judgement will travel on ordinary road.
More specifically, for throttle by the amount strengthened, can arrange default throttle value, that is, only be reached default throttle value at throttle by the amount strengthened, such as, throttle is reached 10% of throttle maximal value by the amount strengthened, and just judges that vehicle is about to or has sailed viaduct into.
Whether the air pressure change amount of step 2101, detection vehicle tyre exceedes preset pressure value.
When detecting that current location front exists overlapping region, if vehicle accelerates through this overlapping region (such as in ordinary road, this signal lamp is accelerated through when signal lamp is about to become red light), only strengthened according to throttle and vehicle may be caused to be about to or sailed the erroneous judgement of viaduct into.In order to further optimize judgement, when detecting that throttle is strengthened, the 3rd Preset Time/distance to separation can be travelled (such as from vehicle, 1 second/3 meters are also had apart from arriving separation) start, to crossing the 4th Preset Time/distance after separation (such as, cross separation 0.5 second/3 meters) till, whether the air pressure change amount detecting vehicle tyre exceedes preset pressure value.Such as, automatic navigator is worth based on the tire pressure value of three Preset Time/distance acquisition, with the tire pressure value obtained in three Preset Time/distance to the 4th Preset Time/distance process (such as, every 0.5 second record once) as change after tire pressure value, and using change after tire pressure value and basic value between maximum variable quantity as air pressure change amount.
Because vehicle is when going up a slope, the air pressure of vehicle front-wheel diminishes, the air pressure of trailing wheel becomes large, therefore, when detecting that the decrease of front-wheel air pressure reaches preset pressure value and the increase of trailing wheel air pressure reaches preset pressure value, can judge that vehicle just sails viaduct into, otherwise judge that vehicle still travels on ordinary road.Preset pressure value can be arranged arbitrarily as required, preferably arranges relatively large, so can avoid the erroneous judgement that the less change of the tire pressure caused due to reasons such as Local Road Surface out-of-flatnesses causes.
It should be noted that, three Preset Time/distance can arrange than the first Preset Time/apart from short, four Preset Time/distance can arrange than the second Preset Time/apart from short, this is because the air pressure change of vehicle tyre only occurs in a bit of distance before and after separation, and the change of throttle size can occur in a segment distance larger before and after separation.
In addition, for engine rear-drive automobile, the traveling even if it opens the throttle in ordinary road, its front-wheel air pressure also can diminish, and trailing wheel air pressure also can become large.Therefore, in order to avoid the erroneous judgement that above-mentioned situation causes, can while the air pressure change amount of the throttle of above-mentioned detection vehicle and vehicle tyre, whether the tilt angle varied amount also detecting vehicle exceedes preset angle angle value, such as, is detected by level meter.Particularly, can from vehicle travel the 3rd Preset Time/distance to separation, to crossing four Preset Time after separation/distance, whether the tilt angle varied amount detecting vehicle exceedes preset angle angle value; When tilt angle varied amount exceedes preset angle angle value, judge that vehicle just sails viaduct into, otherwise judge that vehicle will travel on ordinary road.The testing process of tilt angle varied amount and the similar process of air pressure change amount, can refer to aforementioned explanation, do not repeat them here.
Step 2102, display ordinary road cartographic information.
According to the testing result of step 209, if detect, the throttle of vehicle is not strengthened or is not reached default throttle value by the amount strengthened, then can judge that vehicle still travels on ordinary road, thus continues the cartographic information of display ordinary road.
Step 2111, display viaduct cartographic information.
According to the testing result of step 2101, if detect, the air pressure change amount of vehicle tyre exceedes preset pressure value, then can judge that vehicle just sails viaduct into, can switch the cartographic information being shown as viaduct immediately.
Step 2112, display ordinary road cartographic information.
According to the testing result of step 2101, if do not detect, the air pressure change amount of vehicle tyre exceedes preset pressure value, then can judge that vehicle still travels on ordinary road, thus continues the cartographic information of display ordinary road.
According to the viaduct air navigation aid that the embodiment of the present invention two provides, before travelling the region overlapping with ordinary road to viaduct at vehicle, namely start to judge whether the throttle of vehicle is strengthened, whether the variable quantity of tire pressure meets pre-conditioned, thus determine whether vehicle is about to sail viaduct into, therefore, likely travel at vehicle and can determine whether vehicle is about to sail viaduct into before this region, or, can determine that vehicle is current in the short period (can ignore) after vehicle sails viaduct into and whether travel on viaduct.As can be seen here, relative to the longer distance in prior art from sailing viaduct into or cannot carry out real-time route guidance in the time, the scheme according to the embodiment of the present invention two can carry out real-time route guidance in viaduct.
The structural representation of the car-mounted device that Fig. 3 provides for the embodiment of the present invention three.As shown in Figure 3, car-mounted device 30 comprises the multiple unit connected by bus.Described bus can be various types of bus, and such as, controller local area network (Controller Area Network, CAN) bus, described bus can be divided into address bus, data bus, control bus etc.Described car-mounted device 30 comprises:
Positioning unit 31, for obtaining the current location that vehicle travels;
Overlapping region detecting unit 32, for detecting the predetermined travel route at vehicle, whether the front of described current location exists the region overlapping with ordinary road, viaduct;
Cartographic information acquiring unit 33, when there is the region overlapping with ordinary road, viaduct for detecting when overlapping region detecting unit 32, obtains the cartographic information of viaduct;
Processing unit 34, starts to judge whether vehicle is about to sail viaduct into before described region for travelling at vehicle;
Display unit 35, for when processing unit 34 judges that vehicle is about to sail viaduct into, shows the cartographic information of described viaduct.
In order to travel to starting to judge whether vehicle is about to sail viaduct into before described region at vehicle, cartographic information acquiring unit 33 is also for the separation obtaining viaduct and ordinary road.
Car-mounted device 30, by any one or its combination in following three kinds of modes, realizes travelling to starting to judge whether vehicle is about to sail viaduct into before described region at vehicle:
Mode one: car-mounted device 30 also comprises information of vehicles acquiring unit 36, for travelling the first Preset Time to described separation from vehicle, whether the throttle detecting vehicle is strengthened; Processing unit 34 specifically for: when information of vehicles acquiring unit 36 detects that described throttle is strengthened, judge that vehicle is about to sail viaduct into.
Mode two: car-mounted device 30 also comprises information of vehicles acquiring unit 36, for travelling the 3rd Preset Time to described separation from vehicle, to crossing the 4th Preset Time after described separation, whether the air pressure change amount detecting vehicle tyre exceedes preset pressure value; Processing unit 34 specifically for: when information of vehicles acquiring unit 36 detects that described throttle is strengthened and described air pressure change amount exceedes described preset pressure value, judge that vehicle is about to sail viaduct into.
Mode three: car-mounted device 30 also comprises information of vehicles acquiring unit 36, for travelling the 3rd Preset Time to described separation from vehicle, to crossing the 4th Preset Time after described separation, whether the tilt angle varied amount detecting vehicle exceedes preset angle angle value; Processing unit 34 specifically for: when information of vehicles acquiring unit 36 detects that described tilt angle varied amount exceedes described preset angle angle value, judge that vehicle is about to sail viaduct into.
According to the car-mounted device that the embodiment of the present invention three provides, namely started to judge whether vehicle is about to sail viaduct into before travelling the region overlapping with ordinary road to viaduct at vehicle, therefore, likely travel at vehicle and can determine whether vehicle is about to sail viaduct into before this region, or, can determine that vehicle is current in the short period (can ignore) after vehicle sails viaduct into and whether travel on viaduct.Relative to the longer distance in prior art from sailing viaduct into or cannot carry out real-time route guidance in the time, the scheme according to the embodiment of the present invention three can carry out real-time route guidance in viaduct.
In other distortion of embodiment three are implemented, alternatively, positioning unit 31 specifically for: detect that vehicle is current whether has rolled the region overlapping with ordinary road, viaduct away from; Processing unit 34 specifically for: when positioning unit 31 detects that vehicle is current and rolled the region overlapping with ordinary road, viaduct away from, switch the cartographic information being shown as ordinary road.
Alternatively, cartographic information acquiring unit 33 specifically for: travel to the separation of viaduct and ordinary road at vehicle, the cartographic information of acquisition viaduct; Display unit 35 is also for the button that shows the cartographic information for switching viaduct and ordinary road.Manual switchover supported by this button, can the experience of optimizing user.
Alternatively, cartographic information acquiring unit 33 also for: when the departure place of vehicle is positioned at ordinary road, obtain the cartographic information of ordinary road corresponding to described departure place; When the departure place of vehicle is positioned at viaduct, obtain the cartographic information of viaduct corresponding to described departure place.
Each embodiment in this instructions is existing to be described with stressing, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for device embodiment, because it is substantially similar to embodiment of the method, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.
It should be noted that, device embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.In addition, in device embodiment accompanying drawing provided by the invention, the annexation between unit represents to have communication connection between them, specifically can be implemented as one or more communication bus or signal wire.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (11)
1. a car-mounted device, is characterized in that, comprising:
Positioning unit, for obtaining the current location that vehicle travels;
Overlapping region detecting unit, for detecting the predetermined travel route at vehicle, whether the front of described current location exists the region overlapping with ordinary road, viaduct;
Cartographic information acquiring unit, when there is the region overlapping with ordinary road, viaduct for detecting when described overlapping region detecting unit, obtains the cartographic information of viaduct;
Processing unit, starts to judge whether vehicle is about to sail viaduct into before described region for travelling at vehicle;
Display unit, for when described processing unit judges that vehicle is about to sail viaduct into, shows the cartographic information of described viaduct.
2. car-mounted device according to claim 1, is characterized in that,
Described cartographic information acquiring unit is also for the separation that obtains viaduct and ordinary road;
Described car-mounted device also comprises information of vehicles acquiring unit, and for travelling the first Preset Time to described separation from vehicle, whether the throttle detecting vehicle is strengthened;
Described processing unit specifically for: when described information of vehicles acquiring unit detects that described throttle is strengthened, judge that vehicle is about to sail viaduct into.
3. car-mounted device according to claim 2, is characterized in that,
Described information of vehicles acquiring unit also for: from vehicle travels the 3rd Preset Time to described separation, to crossing the 4th Preset Time after described separation, whether the air pressure change amount detecting vehicle tyre exceedes preset pressure value;
Described processing unit specifically for: when described information of vehicles acquiring unit detects that described throttle is strengthened and described air pressure change amount exceedes described preset pressure value, judge that vehicle is about to sail viaduct into.
4. car-mounted device according to claim 1, is characterized in that,
Described cartographic information acquiring unit is also for the separation that obtains viaduct and ordinary road;
Described car-mounted device also comprises information of vehicles acquiring unit, for travelling the 3rd Preset Time to described separation from vehicle, to crossing the 4th Preset Time after described separation, whether the air pressure change amount detecting vehicle tyre exceedes preset pressure value;
Described processing unit specifically for: when described information of vehicles acquiring unit detects that described air pressure change amount exceedes described preset pressure value, judge that vehicle is about to sail viaduct into.
5. the car-mounted device according to claim 2-4, is characterized in that,
Described information of vehicles acquiring unit also for: from vehicle travels the 3rd Preset Time to described separation, to crossing the 4th Preset Time after described separation, whether the tilt angle varied amount detecting vehicle exceedes preset angle angle value;
Described processing unit specifically for: when described information of vehicles acquiring unit detects that described tilt angle varied amount exceedes described preset angle angle value, judge that vehicle is about to sail viaduct into.
6. car-mounted device according to claim 5, is characterized in that,
Described positioning unit specifically for: detect that vehicle is current whether has rolled the region overlapping with ordinary road, viaduct away from;
Described processing unit specifically for: when described positioning unit detects that vehicle is current and rolled the region overlapping with ordinary road, viaduct away from, switch the cartographic information being shown as ordinary road.
7. car-mounted device according to claim 5, is characterized in that,
Described cartographic information acquiring unit specifically for: travel to the separation of viaduct and ordinary road at vehicle, the cartographic information of acquisition viaduct;
Described display unit is also for the button that shows the cartographic information for switching viaduct and ordinary road.
8. the car-mounted device according to any one of claim 1-4, is characterized in that, described cartographic information acquiring unit also for:
When the departure place of vehicle is positioned at ordinary road, obtain the cartographic information of ordinary road corresponding to described departure place;
When the departure place of vehicle is positioned at viaduct, obtain the cartographic information of viaduct corresponding to described departure place.
9. a viaduct air navigation aid, is characterized in that, comprising:
Obtain the current location that vehicle travels;
Detect on the predetermined travel route of vehicle, whether the front of described current location exists the region overlapping with ordinary road, viaduct;
When detect there is the region overlapping with ordinary road, viaduct time, obtain the cartographic information of viaduct;
Travel at vehicle and started to judge whether vehicle is about to sail viaduct into before described region;
Vehicle current driving in viaduct time, show the cartographic information of described viaduct.
10. method according to claim 9, is characterized in that,
Described traveling at vehicle started to judge whether vehicle is about to sail viaduct into and comprises before described region:
Obtain the separation of viaduct and ordinary road;
From vehicle travels the first Preset Time to described separation, whether the throttle detecting vehicle is strengthened;
When described throttle is strengthened, judge that vehicle is about to sail viaduct into.
11. methods according to claim 10, is characterized in that,
Described traveling at vehicle started to judge whether vehicle is about to sail viaduct into and also comprises before described region:
From vehicle travels the 3rd Preset Time to described separation, to crossing the 4th Preset Time after described separation, whether the air pressure change amount detecting vehicle tyre exceedes preset pressure value;
When described throttle is strengthened and described air pressure change amount exceedes described preset pressure value, judge that vehicle is about to sail viaduct into.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410074917.6A CN104897162A (en) | 2014-03-03 | 2014-03-03 | Elevated road navigation method and vehicle mounted device |
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| CN201410074917.6A CN104897162A (en) | 2014-03-03 | 2014-03-03 | Elevated road navigation method and vehicle mounted device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106568450A (en) * | 2016-10-28 | 2017-04-19 | 苏州大学 | Elevated road vehicle-mounted auxiliary navigation algorithm, and applications thereof |
| CN107340513A (en) * | 2017-05-10 | 2017-11-10 | 浙江亚太机电股份有限公司 | Roads recognition method based on distance detection radar |
| CN114212109A (en) * | 2021-12-31 | 2022-03-22 | 广州小鹏自动驾驶科技有限公司 | Automatic driving control method and device, vehicle and storage medium |
-
2014
- 2014-03-03 CN CN201410074917.6A patent/CN104897162A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106568450A (en) * | 2016-10-28 | 2017-04-19 | 苏州大学 | Elevated road vehicle-mounted auxiliary navigation algorithm, and applications thereof |
| CN106568450B (en) * | 2016-10-28 | 2019-11-26 | 苏州大学 | A kind of vehicle-mounted assisting navigation algorithm of overpass and application |
| CN107340513A (en) * | 2017-05-10 | 2017-11-10 | 浙江亚太机电股份有限公司 | Roads recognition method based on distance detection radar |
| CN107340513B (en) * | 2017-05-10 | 2020-04-28 | 浙江亚太机电股份有限公司 | Road identification method based on distance detection radar |
| CN114212109A (en) * | 2021-12-31 | 2022-03-22 | 广州小鹏自动驾驶科技有限公司 | Automatic driving control method and device, vehicle and storage medium |
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