JP4087124B2 - Navigation device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a vehicle-mounted navigation device that displays a mark indicating a vehicle position on a map image, and more particularly to a vehicle-mounted navigation device that can appropriately correct the vehicle position on a running road.
[0002]
[Prior art]
A conventional navigation system is mounted on a vehicle, acquires satellite radio waves by a GPS (Global Positioning System) unit or the like, and obtains the current position of the vehicle based on data from these sensors. Then, a map image centered on the vehicle position is read from a recording medium such as a DVD on which map information including map image and road information is recorded, and a mark indicating the vehicle position is superimposed on the map image and displayed on a predetermined monitor. To do. The driver can recognize the positional relationship between the driving vehicle and the surrounding road by referring to the map image and the vehicle position displayed on the monitor, and can advance the vehicle to a destination or the like without getting lost. .
[0003]
As described above, such navigation apparatus mainly uses satellite navigation in which a satellite radio wave transmitted from a GPS satellite is received by a GPS unit or the like, and a vehicle position is calculated according to the received satellite radio wave. In this satellite navigation, an error of about 10 m to 20 m is normally expected. In addition, satellite navigation may cause a larger error due to the influence of high-rise buildings around the vehicle. For this reason, if the vehicle position calculated by satellite navigation is used as it is and the vehicle mark is superimposed on the map, the mark is not located on the road even though the vehicle is actually located on the road due to the generated error. Cases arise.
[0004]
As a countermeasure, the navigation apparatus is provided with a map matching function for correcting the vehicle position so that the vehicle position obtained by the sensor is positioned on the road. This map matching function appropriately corrects the vehicle position on the map image so as to be positioned on the nearest road in anticipation of the generated error by using, for example, matching between the shape of the travel locus and the shape of the road. .
[0005]
However, when such a map matching function is simply used, the vehicle position after the map matching exists on the road, but may not be corrected correctly on the road that is actually running. More specifically, when the highway and a general road overlap each other due to an overpass or when the vehicle is traveling in a parallel area, the navigation system determines which vehicle is Since it is not possible to accurately determine whether the vehicle is traveling on the other road, the vehicle position may be corrected on the wrong road.
[0006]
Therefore, in consideration of such a case, conventionally, it is determined whether the vehicle has entered the expressway or the like by using the height difference of the vehicle or the vehicle angle when entering the expressway or the like, and matches the correct road. I am doing so. In addition, when an expressway or the like has a structure that flows into the main line while turning from an ordinary road through an interchange, the gyro sensor or the like determines the turning of the vehicle, and the traveling locus of the vehicle and the road shape of the electronic map. The pattern matching is used to determine the intrusion on the highway and the like, and the correct road is matched.
[0007]
[Problems to be solved by the invention]
However, an expressway or the like is running in parallel with a general road, and there is a case where the expressway enters the expressway with almost no difference in height and almost no turn. In this case, since the turning of the vehicle and the height difference cannot be determined, it cannot be determined whether the vehicle is traveling on a highway or a general road, and map matching may be performed on an incorrect road.
[0008]
In this navigation device, as shown in FIG. 3 and FIG. 4, the expression of the screen is changed depending on the road on the expressway and the general road. There was a problem of inconvenience.
[0009]
In addition, a function for automatically calculating a travel route is adopted in recent navigation devices, and when a vehicle is driven according to this travel route, a function for guiding a voice to turn right or left or branch by voice is also installed. Yes. This function makes the route calculation conditions different between highways and ordinary roads, and the timing of voice guidance is switched depending on the road that is running, so this voice guidance is traveling on a road different from the actual road. If it was determined that the information was incorrect, it was transmitted to the driver as incorrect information, which could hinder proper guidance to the destination.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a navigation device that enables discrimination between toll roads such as many expressways and ordinary roads.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a navigation device according to the present invention includes a storage medium storing map data, current position detecting means for detecting the current position of the vehicle, a result detected by the current position detection, and map data. Road determination means for determining the road that is running, toll gate approach determination means for determining that the vehicle is approaching the toll gate based on the current position detection means, and whether or not an operation related to toll payment has been performed Charge payment-related operation determination means, and toll road entry determination means for determining entry of a vehicle into a toll road based on the approach determination means and payment-related operation determination means, and further, The operation determination means is performed by detecting opening / closing of a vehicle window.
[0013]
According to this invention, it is determined that the vehicle has entered the toll road from the general road by detecting the opening and closing of the window of the vehicle related to the approach to the toll gate of the vehicle and the fee payment operation performed when entering the toll road. Therefore, even if there is no difference in level between a general road and a toll road, it is possible to identify with high accuracy.
[0014]
In order to achieve the above object, a navigation device according to the present invention includes a storage medium storing map data, current position detecting means for detecting the current position of the vehicle, a result detected by the current position detection, and map data. Road determination means for determining the road that is running, toll gate approach determination means for determining that the vehicle is approaching the toll gate based on the current position detection means, and whether or not an operation related to toll payment has been performed Charge payment-related operation determining means, and toll road entry determining means for determining the approach of the vehicle to the toll road based on the approach determining means and the payment operation determining means, and further the charge payment related operation The determination means is performed by detecting opening / closing of a vehicle window and detecting a vehicle speed.
[0015]
According to the present invention, the vehicle is moved from the general road to the toll road by detecting the opening and closing of the window of the vehicle related to the approach to the toll gate of the vehicle and the fee payment operation performed when entering the toll road, and further by determining the speed of the vehicle. Therefore, it is possible to more accurately identify the general road and the toll road even if there is no difference in elevation.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a navigation device according to the present invention will be described below with reference to the drawings. Note that each function of the embodiment described below is realized by a predetermined mechanism or software controlling a computer and peripheral devices. In the present specification, “ The invention and the embodiment are described assuming a virtual circuit block such as “... Therefore, for each block, each hardware element or software element that realizes this does not correspond one-to-one.
[0017]
[1. Constitution]
FIG. 1 shows a hardware configuration example of a navigation system according to the present invention. Reference numeral 1 denotes a GPS receiver that detects an absolute position and direction, represented by GPS. Reference numeral 2 denotes an azimuth detector using a gyro. 3 is a vehicle speed detecting unit for processing pulses obtained from the car. 4 is a window opening / closing detection unit that detects opening / closing of a vehicle window.
Reference numeral 5 denotes a CPU that controls the entire system. Reference numeral 6 denotes a signal processing unit that inputs various signals from the CPU 5 and other parts and processes the signals. Reference numeral 7 denotes a ROM disk such as a DVD disk that is accessed by the CPU of 5 above at the time of startup or the like. Reference numeral 8 denotes a data reading device for reproducing the ROM disk 7. 9 is a memory having functions such as storing data for loading the main program, storing data when the power is turned off, and temporarily storing display data. Reference numeral 10 denotes a display control unit that controls the display of the display 10a. 10a is a display for displaying a map and a menu. 11 is an operation unit for inputting various information by the user. Reference numeral 12 denotes an amplifier that amplifies an audio signal output from the signal processing unit, and reference numeral 13 denotes a speaker.
[0018]
[2. Operation]
As shown in FIG. 1, the navigation device reads map data in a predetermined range over a wide area from the ROM disk 7 based on the current position when the power is turned off stored in the power-on memory 9. Capture to memory 9. Thereafter, the current position is calculated based on the GPS receiver 1, the azimuth detecting unit 2, and the vehicle speed detecting unit 3, and the memory 9 displays a display every other second for display on the display 10a based on the newly obtained current position. The map data of the display range is read into the memory 9, and the current position mark is overlaid on the map and stored at the same time.
[0019]
When deciding a destination and setting a route, first, the destination is set. As described above, the destination is selected by scrolling the map with the operation unit 11 to determine a point, and the CPU 5 calculates the optimum route from the current position to the destination.
Then, when the route is set and the vehicle starts to travel along the route, the vehicle position that changes from time to time is obtained from the absolute position data from the GPS receiver 1 every predetermined time, the travel distance obtained from the vehicle speed detection unit 3, and the direction The vehicle position coordinates are comprehensively calculated from the vehicle heading direction data obtained from the detection unit 2 and compared with the road data stored in the memory 9, and the current position is determined on the road closest to the obtained position coordinates. After correction, the vehicle position is updated after the map matching, and the mark of the current position obtained on the map data is superimposed on the map data and displayed on the display 10a as shown in FIG.
[0020]
In addition, there are road types (general roads such as expressways, toll roads, national roads, major local roads) as an electronic map database, and there are charges for traveling on roads such as toll gates, toll ticket offices, etc. The coordinates of the facility incidental to the road (latitude, longitude, etc.) are included, and these data are taken into the memory 9 from the ROM disk 7.
[0021]
Furthermore, when traveling on a toll road such as an expressway, in the case of deferred payment, a pass ticket is received when entering the expressway, and conversely, in the case of prepaid charge, money is paid at the entrance gate. At this time, the vehicle passes through a gate installed on the road, and in the case of a vehicle not equipped with an automatic toll collection system such as ETC, the vehicle is always temporarily stopped at the gate.
[0022]
The main content of this case is to determine the state of the temporary stop and use it to determine that the vehicle has entered the highway toll road.
In addition, facilities displayed on the map (for example, stations, gas stations, convenience stores, etc.) are managed in coordinates, and of course, highway / toll road gates (toll booths, toll ticket offices) are also managed in coordinates. Therefore, it is possible to determine whether the vehicle is approaching or far away based on where the host vehicle is and in which direction the vehicle is traveling.
[0023]
Therefore, after confirming that the vehicle has approached the entrance of the expressway / toll road within a predetermined range (for example, a radius of 200 m), it is determined whether the vehicle has approached the gate. The gate location, vehicle stop, and vehicle window open / close determination are combined to determine whether the gate has passed or not passed.
[0024]
Next, an approach operation determination on a toll road represented by a highway that is the center of the present invention will be described with reference to the flowchart of FIG. The process of the flowchart is performed by the CPU 5 of FIG.
[0025]
First, it is determined whether the obtained current position is on a general road by map matching, that is, whether it is traveling on a general road (ST1). If the vehicle is traveling on a general road, it is determined whether the current position is approaching the entrance of a toll road such as a high speed, that is, whether the current position is within 200 m from the entrance position of the toll road (ST2). If there is no current position within 200m from the entrance position of the toll road, for example, return to ST1, and if it enters within 200m, in ST3 this time approaching the gate, that is, whether the current position is within 50m from the gate. to decide. If the current position is not within 50 m from the gate, the process returns to ST2. If the current position is within 50 m, in ST4, whether the vehicle has stopped temporarily, that is, whether the vehicle speed detection unit 3 has become 5 km / h or less, Double-check whether the driver's side window has been opened. Here, if the vehicle does not stop or the window cannot be opened, the process returns to ST3. If the vehicle stops and the window is opened, that is, if the operation related to the fee payment is permitted, the vehicle is charged. It is determined that the vehicle has entered the road (ST5).
[0026]
Incidentally, FIG. 6 is a flowchart showing a process for determining whether the vehicle exits the toll road while the vehicle is traveling on a toll road such as an expressway. In ST6, it is determined that the vehicle is traveling on a toll road, and in ST7 the vehicle is tolled. If the vehicle approaches the gate at ST8 and the vehicle approaches the gate at ST8, the vehicle is temporarily stopped at ST9, and when the opening / closing of the window is detected, the vehicle leaves the toll road at ST10. to decide.
[0027]
The present invention is not limited to the above-described embodiment, and includes other embodiments as described below. That is, as a method for determining the operation related to the fee payment, it is determined that the vehicle has passed through the gate when both the vehicle stop and the window opening / closing operation are satisfied, but if only the window opening / closing operation is applicable. It may be determined that the vehicle has passed through the gate. Alternatively, a camera that captures a landscape may be installed, and the shape and color of the gate may be identified and determined by image recognition, and based on this result, it may be determined that the vehicle has passed the gate.
[0028]
【The invention's effect】
According to the present invention, for a toll road such as an expressway with a gate, it can be determined by this method that the toll road has entered any toll structure. The same process can be used when exiting a toll road such as an expressway.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a navigation device according to an embodiment of the present invention.
FIG. 2 is a diagram showing a map screen display example of the navigation device according to the same embodiment.
FIG. 3 is a diagram for explaining an example of a guidance screen display during traveling on a highway.
FIG. 4 is a diagram for explaining an example of a guidance screen display during traveling on a general road;
FIG. 5 is a flowchart showing a toll road entry determination operation of the navigation device according to the same embodiment.
FIG. 6 is a flowchart showing a toll road exit determination operation of the navigation device according to the same embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... GPS receiver 2 ... Direction detection part 3 ... Vehicle speed detection part 4 ... Window opening / closing detection part 5 ... CPU
9 ... Memory 10a ... Display 11 ... Operation unit 12 ... Amplifier 13 ... Speaker

Claims (2)

A storage medium storing map data, current position detection means for detecting the current position of the vehicle, road determination means for determining the road on which the vehicle is traveling from the result of detection of the current position and map data, and current position detection A toll gate approach determining means for determining that the vehicle is approaching the toll gate based on the means; a toll payment related operation determining means for determining whether or not an operation related to the toll payment has been performed; And a toll road entry judging means for judging the entry of the vehicle into the toll road based on the means and the payment related action judging means, and the toll payment related action judging means detects the opening and closing of the vehicle window. A navigation device characterized by 2. The navigation apparatus according to claim 1, wherein said fee payment related operation determining means is performed by detecting a vehicle speed.

Images