JP4961742B2 - Navigation information system and vehicle terminal therefor - Google Patents

Description

  The present invention relates to a navigation information system for accumulating probe information relating to a traveling environment collected by a vehicle terminal in a server of a traffic information center, and providing map information created based on the accumulated probe information to a moving vehicle, and a vehicle terminal therefor About.

In the navigation information system for vehicles, in addition to the route guidance of the driving route, the driving state indicating the driving environment of the past vehicle is accumulated in the server of the traffic information center, the traffic congestion statistical information indicating the frequent traffic congestion points, the expansion of the traffic congestion Information that evaluates road characteristics, such as information on a tendency to shrink, is provided to the vehicle, and the vehicle that has received the information is presented to the occupant by a monitor display or voice of a navigation device.
As traveling environment information, probe information such as sequential vehicle position and speed is obtained at a vehicle terminal of a moving vehicle traveling on a road and stored in a server. It is difficult to immediately determine whether the traffic jam information based on the information is a traffic jam that frequently occurs on the road from which the probe information has been obtained or an unexpected traffic jam due to an accident or construction.

As a countermeasure, JP 2004-234649 A discloses that a traffic information center detects an abnormal value with a predetermined threshold based on past information accumulated in a server and removes the detected abnormal value from the server. An information management process has been proposed.
For example, in the driving data for a certain road, data indicating that there is a traffic jam for more than a predetermined time such as 20 hours of the day is considered to be caused by a special situation due to a sensor failure on the vehicle or a special event. Therefore, the day-to-day data on the road related to the data is abnormal. Congestion information in the same time zone is compared for accumulated days, and data with a large deviation is abnormal.
JP 2004-234649 A

However, in the processing of the navigation information system proposed in the above Japanese Patent Laid-Open No. 2004-234649, the probe information is simply sent sequentially from the vehicle terminal to the server at a predetermined timing, and the information is in a normal state. It is actually unclear whether it is due to sudden special circumstances.
Therefore, although abnormal values are determined with a predetermined threshold value, even probe data that should not be used as data originally under abnormal conditions is normal data if the threshold value is cleared. As a result, the reliability of the data stored in the server is impaired.

  Therefore, in view of the above problems, the present invention excludes data generated under special circumstances, and allows navigation information that can be stored in a server as probe information only for data useful for general road characteristic evaluation and the like. An object is to provide a system and a vehicle terminal therefor.

Therefore, the present invention includes a vehicle terminal that is mounted on a moving vehicle and includes a probe unit that sequentially collects probe information related to a traveling environment, and a server that accumulates probe information collected at the vehicle terminal. And a traffic information center that creates map information on the basis of which the probe unit determines whether or not the host vehicle is in a predetermined vehicle state, and if the host vehicle is in the predetermined vehicle state, The determination means for determining that the vehicle is not in the normal running state, and when it is determined that the host vehicle is not in the normal running state, the collection of the probe information is interrupted while the state not in the normal running state continues. The map information created based on the probe information at the traffic information center includes an evaluation value of road characteristics, and the evaluation value of the road characteristics is a maximum amplitude of vehicle speed fluctuation The vehicle speed fluctuation minimum period S and the vehicle speed fluctuation total sum G are smaller. The smaller the maximum amplitude B of the vehicle speed fluctuation, the longer the minimum cycle S of the vehicle speed fluctuation, or the smaller the sum G of the vehicle speed fluctuation amounts. The evaluation value was a good evaluation.
In the present invention, the predetermined vehicle state is any one of the following (1) to (4).
(1) The predetermined vehicle state is a state in which a change in vehicle speed corresponding to a sudden start / stop state of the vehicle is detected.
(2) The predetermined vehicle state is a state in which a change speed of the steering angle corresponding to an extreme steering operation state is detected.
(3) The predetermined vehicle state is a state in which a shift lever position corresponding to the reverse traveling state is detected.
(4) The predetermined vehicle state is a state in which an abnormal value state of a sensor that acquires probe information is detected.

  As probe information stored in the server of the traffic information center, unnecessary information exclusion means of the probe unit excludes probe information for which data in a normal traveling state is not expected based on a predetermined vehicle state. As a result, data generated under special circumstances is excluded, and only probe information that is useful for creating general road characteristic evaluations, etc. is stored in the server, so the traffic information center creates highly reliable map information. be able to.

Next, an embodiment of the present invention will be described.
FIG. 1 is a system conceptual diagram of the embodiment.
A vehicle terminal 10 is mounted on the moving vehicle 1 traveling on the road. The vehicle terminal 10 includes a navigation unit that receives positioning data from the GPS satellite 4 and position information from the beacon 5 installed along the road, and detects the current position. The vehicle terminal 10 further sequentially obtains vehicle speed data, a travel locus, etc., and transmits it as probe information together with the current position to the traffic information center 2 capable of mutual communication.

  In the traffic information center 2, probe information data received from the vehicle terminal 10 is stored in the server 3. Based on this accumulated data, road characteristics such as road maps and the time required for each road section on the map, traffic regulation due to inspections and events, traffic congestion statistics based on traffic volume, etc., information on the tendency to increase or decrease traffic congestion, etc. Information (hereinafter referred to as map information on behalf of these) is created and stored in the server 3 as a map information database. The map information is transmitted based on a request from the moving vehicle 1, and the vehicle terminal 10 uses the received map information as navigation information.

FIG. 2 is a block diagram showing the configuration of the vehicle terminal.
The vehicle terminal 10 includes a navigation unit 20, a probe unit 30, and a communication unit 40 for wireless communication with the traffic information center 2 as a basic configuration.
A vehicle speed sensor 11, a GPS receiver 12, a beacon receiver 13, a display 14, and a speaker 15 are connected to the navigation unit 20. The navigation unit 20 includes a current position detection unit 22 that detects the current position of the vehicle based on the positioning data received by the GPS receiving unit 12 and the position information received by the beacon receiving unit 13, and a road map database 24 that stores road map data. A guidance information storage unit 26 that stores intersection information, facility information, and the like is provided, and a map such as a current position and a route to the destination is displayed on the display 14 and route guidance by the speaker 15 is performed. The arrival time at the destination can also be presented based on the vehicle speed from the vehicle speed sensor 11.
The above configuration of the navigation unit 20 is the same as a known one.

A steering angle sensor 51, a shift lever position sensor 52, an altitude sensor 53, an airbag sensor 54, a seat sensor 55, an acceleration sensor 56, and an orientation sensor 57 are connected to the probe unit 30 connected to the navigation unit 20.
The steering angle sensor 51 detects the steering angle of the steering.
The shift lever position sensor 52 detects the range position selected by the shift lever.
The altitude sensor 53 detects the altitude of the road based on the atmospheric pressure.
The airbag sensor 54 detects the operation of the airbag.
The seat sensor 55 detects the seating state of the driver seat.
The acceleration sensor 56 detects the acceleration of the vehicle body.
The direction sensor 57 detects the direction in which the longitudinal axis of the vehicle is facing.

  The probe unit 30 captures the current position detected by the current position detection unit 22 of the navigation unit 20, the vehicle speed from the vehicle speed sensor 11 via the navigation unit 20, and the altitude information from the altitude sensor 53, and travels based on the current position. A travel trajectory calculation unit 32 that calculates a trajectory, a travel distance calculation unit 34 that calculates a travel distance based on the vehicle speed, and a travel timer 36 that counts the travel time are provided. These current position, vehicle speed, altitude information, travel trajectory, travel distance The traveling time and the like are temporarily stored in the built-in memory 38 as probe information.

In addition to these, the probe information may include road width, road material, road surface physical state, road surface state based on weather, and the like.
For example, as for the width of the road, as disclosed in JP-A-10-143646, the width of the road can be obtained from the road area extracted by the image processing using the road image capturing means.
As disclosed in Japanese Patent Application Laid-Open No. 2003-346286, it is possible to identify concrete roads and gravel roads by irradiating the road surface with light and processing electric signals obtained from the reflected light. It is.

Further, as for the physical state of the road surface, as disclosed in Japanese Patent Application Laid-Open No. 2004-294152, a road surface smooth state or unevenness can be detected by a profiler using laser light or the like.
The road surface condition based on the weather can also detect the flood condition using a sensor capable of detecting a liquid tangible object such as water, as disclosed in JP-A-2004-341795. In addition to the above-mentioned Japanese Patent Application Laid-Open No. 2003-346286, snow roads, freezing roads, wet / dry roads and the like can be identified, and Japanese Patent Application Laid-Open No. 2005-275723, Japanese Patent Application Laid-Open No. 11-248439, etc. A detection means for freezing and drying is shown.

Next, in the present embodiment, the probe unit 30 stores the probe information stored in the memory 38 in the server 3 of the traffic information center 2 because it is not suitable for creating map information based on the vehicle state at the time of acquisition. Remove unnecessary information that should not be used.
Then, the communication unit 40 removes unnecessary information and transmits the probe information stored in the memory 38 to the traffic information center 2 at regular time intervals.

The vehicle state at the time of probe information acquisition is determined using the steering angle sensor 51, the shift lever position sensor 52, the airbag sensor 54, the seat sensor 55, and the like.
An example of unnecessary information to be removed will be described below.
(1) Initial period when starting the vehicle Since the vehicle speed fluctuates when the vehicle starts, it is not suitable for use in the evaluation of road characteristics. Therefore, probe information data for this period is excluded. For this reason, after the ignition switch (not shown) is turned on, the time until the vehicle speed from the vehicle speed sensor 11 increases from 0 (zero) and stabilizes within a predetermined fluctuation range set in advance is determined when the vehicle starts. The initial period of
An average time t until the fluctuation of the vehicle speed on a general road is stabilized within a predetermined fluctuation range is obtained in advance, and the clock timer built in the probe unit 30 is used from the time when the vehicle speed starts to increase from zero. By measuring the passage of time, the time until t can be set as the initial period.

(2) When a vehicle starts or stops suddenly A sudden start or stop of a vehicle may be caused by a mistake in driving or an emergency evacuation while driving. Data in this state is used to evaluate road characteristics. Not suitable for use. Therefore, the vehicle speed is monitored, and as shown in FIG. 3, a period T1 ((() in which an excessive increase or an excessive decrease in the vehicle speed corresponding to a sudden start and a sudden stop exceeding the normal running state continues. The probe information data of (a) sudden start) and T2 ((b) sudden stop) is excluded.
Here, when there is a vehicle speed increase of more than pkm / h in n seconds, the vehicle speed change is excessively increased, and when the vehicle speed is increased from pkm / h to 0 km / h in n seconds, the vehicle speed change is excessively decreased. Is set in advance.

(3) At the time of extreme steering operation Since a sudden steering operation exceeding the steering range in a normal driving state is assumed to cause a U-turn or an emergency evacuation situation on the road, the driving locus data in this state Are not suitable for use in the evaluation of road characteristics for road mapping. Therefore, the angular velocity of the steering is monitored, and the probe information data when the steering angular velocity exceeding a predetermined value exceeding the steering in the normal traveling state occurs is excluded. The angular speed is obtained from the change speed of the steering angle from the steering angle sensor 51.
As shown in FIG. 4, the period to be excluded is a period T3 from the time when the angular velocity equal to or higher than the predetermined value is generated in the steering of the steering to the end of the steering.

(4) During reverse travel Since the reverse (reverse) travel of the vehicle is not a normal travel state, it is not appropriate to use the data in this state for the evaluation of road characteristics. Therefore, the shift lever position from the shift lever position sensor 52 is monitored, and the probe information data during the period T4 in which the shift lever is in the reverse position and the reverse travel shown in FIG. 5 is excluded.

(5) At the time of an accident When an accident involving a vehicle occurs, it is an abnormal situation different from normal driving, and it is clear that probe information in normal driving that can be used for evaluating road characteristics cannot be obtained. It is. Therefore, the airbag sensor 54 and the vehicle speed sensor 11 exclude probe information data from the start of airbag operation until the vehicle speed becomes 0 (vehicle stop).

(6) Driver absence period When the vehicle is stopped on the road and the cause is a congestion state, the stop state (vehicle speed = 0) is effective for evaluating road characteristics. Therefore, when the vehicle is away from the vehicle, it simply means that the vehicle is not in a driving state, and is not in a state in which probe information based on actual traveling effective for evaluation of road characteristics can be provided.
Therefore, the seat state of the driver's seat is monitored by the seat sensor 55, and probe information data during a period when the driver is not seated in the driver's seat is excluded.

(7) Period when vehicle speed fluctuations occur for reasons other than road conditions For example, when passing a toll gate on a toll road, you must stop or slow down regardless of the road conditions. Therefore, it is not necessary for evaluation of road characteristics.
Therefore, based on the toll gate position stored in the guidance information storage unit 26 of the navigation unit, if the vehicle speed fluctuates before and after the toll gate position, it is determined that the vehicle has fluctuated and the vehicle speed fluctuation period That is, probe information data for a period from when the vehicle speed starts decreasing until the vehicle speed returns to the value before the decrease is excluded.

(8) Period in which the output of the vehicle speed sensor does not indicate the actual vehicle speed When the vehicle speed sensor 11 outputs a vehicle speed signal based on the rotational speed of the wheel, the wheel is idling, slipping, or sliding on the road surface during traveling. In such a case, the vehicle speed sensor 11 does not indicate an accurate vehicle speed, and thus is not suitable for evaluation of road characteristics.
When the wheel slips or slips, it appears as an excessive increase or decrease in the vehicle speed, as in the case of sudden start or stop of the vehicle, but no significant change appears in the speed of the vehicle itself. There is no change in the output of 56. Based on these phenomena, idling and slipping of the wheel can be detected.
Furthermore, by monitoring the azimuth change detected by the azimuth sensor 57, a sliding state on a frozen road surface where the direction of the vehicle body changes is also detected.
The probe information data during the period when the wheel slipping, slipping, or sliding on the road surface detected as described above is excluded.

(9) Period excluding proper operation state of sensor Vehicle speed sensor 11 and altitude sensor 53 (collectively referred to as sensor device) for directly collecting probe information, such as a start-up stage at start-up, output normal output. Even during an operation preparation period that does not occur, the reliability of the data is poor, and therefore probe information data related to individual sensors or the like is excluded from transmission targets.
For example, since the start-up time until the normal output is different for each sensor, the period is set individually.
As described above, the unnecessary information exemplified in (1) to (9) is removed, and the probe information stored in the memory 38 is transmitted to the traffic information center 2 via the communication unit.
It is assumed that the travel time in the probe information stored in the memory 38 is obtained by subtracting the travel time for each period to be excluded from the actual travel time.

FIG. 6 is a flowchart showing the flow of processing in the probe unit 30.
Here, when the ignition switch is turned on, the vehicle terminal 10 is also turned on. First, in step 100, it is confirmed that the operation preparation period of the sensor device has elapsed.
Next, in step 101, it is confirmed that the initial period at the start of the vehicle has elapsed.
When the initial period has elapsed, the travel timer 36 starts counting the travel time in step 102.
In step 103, it is checked whether the vehicle is suddenly started or stopped.
When the vehicle is not suddenly started or stopped, the process proceeds to step 104 to check whether the vehicle is in an extreme steering operation state.
When it is not an extreme steering operation state, the routine proceeds to step 105.

In step 105, it is checked whether or not the vehicle is in a reverse running state.
When the vehicle is not in the reverse running state, the process proceeds to step 106 to check whether the vehicle is in an accident encounter state.
When it is not in the accident encounter state, the process proceeds to step 107 to check whether the driver is absent from the driver's seat.
When the driver is not present, the routine proceeds to step 108, where it is checked whether or not the vehicle speed fluctuates due to causes other than road conditions.
When the vehicle speed fluctuation has not occurred, the routine proceeds to step 109, where it is checked whether or not the output of the vehicle speed sensor 11 does not indicate the actual vehicle speed.
When the output of the vehicle speed sensor 11 indicates the actual vehicle speed, the routine proceeds to step 110.

In step 110, assuming that the vehicle is in a normal running state, if the running timer 36 is counting, the counting is continued as it is, and when the running timer 36 is interrupted, the counting is resumed.
In step 111, the current current position, vehicle speed, altitude information, and travel time are taken in, and a travel locus, travel distance, and the like are calculated, and these are temporarily stored in the memory 38 as probe information.
Then, the process returns to step 103.

On the other hand, if it is determined in step 103 that there is a sudden start / stop state, the count of the travel timer 36 is interrupted in step 120 and step 103 is repeated until the start / stop state is exited.
Similarly, when it is in an extreme steering operation state in the check in step 104, in a reverse running state in the check in step 105, in an accident encounter state in the check in step 106, when there is no driver in the check in step 107 When the check at step 108 is in a state where the vehicle speed fluctuates due to a cause other than the road condition, and when the output of the vehicle speed sensor 11 does not indicate the actual vehicle speed at the check at step 109, Proceeding to step 120, the count of the travel timer 36 is interrupted, and then the process returns to step 103.

Thus, when a vehicle state in which probe information data is to be excluded is detected in the check in any step, the count of the travel timer 36 is interrupted and the probe information is not captured while the state continues. Only the probe information while the vehicle is in the normal running state is stored in the memory 38.
The probe information stored in the memory 38 is transmitted to the traffic information center 2 by the communication unit 40 at regular time intervals.

The traffic information center 2 accumulates the probe information received from the vehicle terminal 10 in the server 3 and creates map information based on the accumulated probe information.
As map information, first, a road map of a traveled section is created by plotting road presence / absence, curve shape, etc. on plane coordinates represented by latitude / longitude from the data of the travel locus. In addition, road gradient information is added to the map using altitude information associated with the travel locus. The road map created in this way is held in the server 3.

In addition, the road characteristics are evaluated from the aspect of vehicle driving convenience.
That is, the road is divided into appropriate sections, and an evaluation value X indicating the quality of the road is given for each road section.
For example, when evaluating by the length of time required to complete traveling on a road section, the shorter the required time, the better the evaluation. However, the evaluation is based on the probe information when the vehicle travels within the legal speed limit, so that an evaluation under a general traveling condition can be obtained as much as possible.
The evaluation unit may be a five-dimensional or ten-level evaluation on a one-dimensional scale, or the evaluation value X may be expressed by a one-dimensional integer value or real value.
Similarly, based on the probe information, as described in Japanese Patent Application Laid-Open No. 2004-234649, information such as the degree of occurrence of traffic jams and the tendency to increase / decrease traffic jams is also created, and the server together with the evaluation value of the required time 3 is held.

Furthermore, when evaluating from the aspect of the vehicle speed fluctuation in the road section, as shown in FIG. 7, the road having a small amplitude and a long cycle as shown in (b) than the road situation in which the fluctuation is frequently repeated as shown in (a). The situation is preferred.
Actually, since a considerable number of vehicle speed fluctuations are expected in a road section on a general road, for example, the smaller the maximum amplitude B shown in FIG. 8, the better the evaluation, and the longer the minimum period S, the better the evaluation.

Further, the sum G of the vehicle speed fluctuation amount can also be used as an evaluation parameter. The total sum G of vehicle speed fluctuation amounts can be defined, for example, as two types according to the evaluation policy.
First, the smaller the speed change from the reference vehicle speed (average vehicle speed) of the road section, the more stable the driver's preference is. The sum of the absolute values of the differences from the reference vehicle speed Vo is the sum G, The smaller this is, the better the evaluation.
For example, in the example shown in FIG. 9, a better evaluation value is given to the change mode (b) where the total area of the hatched region is smaller than the change mode (a) where the area is large.

Second, since the increase or decrease in the amount of change in vehicle speed from the reference vehicle speed is offset as an effect on the sense of driving stability, the smaller the value after subtraction, the more stable the driving feeling is given. The absolute value of the sum of the change in change with the positive / negative of the vehicle speed with respect to the reference vehicle speed is defined as the sum G, and the smaller the value, the better the evaluation.
That is, as shown in FIG. 10, the change mode (a) in which the area difference between the hatching region above and the lower hatching region above the reference vehicle speed Vo is smaller than the change mode (b) in which the area difference is larger. A good evaluation value is given.

Therefore, the vehicle speed fluctuation evaluation is performed using an evaluation formula V = f1 (B, S, G) + C using the maximum amplitude B, the minimum period S, and the total amount G of the vehicle speed fluctuation as parameters.
It is represented by However, C is a constant.
Further, the overall evaluation of the road section in consideration of the evaluation value X related to the time required to complete the road section is W = f2 (X, V) + D
It is represented by However, D is a constant.

The evaluation value at each stage obtained as described above is held in the server 3. For a parameter having a plurality of evaluation policies, an evaluation value for each evaluation policy is held.
The traffic information center 2 updates the map information composed of road maps and evaluation values related to road characteristics, etc., stored as a map information database in the server 3 with new map information every time the probe information is obtained from the moving vehicle side. At this time, the map information before the change can also be saved separately as the existing information.

The traffic information center 2 transmits map information from the map information database of the server 3 to the moving vehicle 1 based on the request. By selecting an evaluation policy from the moving vehicle 1 when requesting map information, an evaluation value based on the selected evaluation policy is transmitted.
On the moving vehicle 1 side, the vehicle terminal 10 receives this map information and stores it in the road map database 24 or the guidance information storage unit 26 of the navigation unit 20 according to the contents. The navigation unit 20 uses the map information with reference to route search or the like.
In the present embodiment, steps 100 to 109 and step 120 in the flowchart of FIG. 6 constitute unnecessary information exclusion means in the invention.

The embodiment is configured as described above, and the vehicle terminal 10 including the probe unit 30 that sequentially collects probe information related to the traveling environment is mounted on the moving vehicle 1, and the probe information collected by the vehicle terminal 10 in the traffic information center 2. In the navigation information system including the server 3 for storing the map information and generating the map information based on the stored probe information, the probe unit 30 of the vehicle terminal uses the predetermined vehicle as the probe information stored in the server 3. Based on the conditions, probe information for which data in normal driving conditions is not expected is excluded, so data generated under special circumstances is excluded, and only probe information useful for creating general map information is stored in the server. 3 is accumulated.
Therefore, the traffic information center 2 can create highly reliable map information, and the mobile vehicle 1 can receive this map information from the traffic information center 2 and use it for navigation.

Since the vehicle terminal 10 includes the communication unit 40, the probe information collected by the probe unit 30 can be automatically transmitted to the traffic information center 2.
Since the map information created by the traffic information center 2 includes road maps and road characteristic evaluation values, new road maps can be added or modified. Thereby, in the navigation part 20 of a vehicle terminal, suitable route selection etc. can be performed in route search.

The probe unit 30 of the vehicle terminal 10 excludes probe information when there is a change in the vehicle speed corresponding to the sudden start / stop state of the vehicle as the predetermined vehicle state. Unnecessary information unsuitable for characteristic evaluation is not stored in the server 3 of the traffic information center 2.
Similar unnecessary information includes probe information when there is a change speed of the steering angle corresponding to an extreme steering operation state, vehicle speed when the shift lever position is in the reverse traveling position, or when the wheel is idling, slipping or sliding. Since the probe information when the sensor output is in an abnormal value state, such as a sensor, is excluded, the traffic information center 2 does not include data under sudden special circumstances, but only data useful for creating road characteristic evaluations and the like. Map information can be created.

  Specifically, unnecessary information is excluded by not collecting probe information during each predetermined vehicle state described above. Therefore, unnecessary information is stored after temporarily storing all data in the memory 38 for temporarily storing probe information. Compared to the case of removing and sorting out, the processing is simple and the capacity of the memory 38 is small.

  The period during which the probe information is not collected is, for example, a period T4 in which the shift lever is in the reverse position during reverse traveling, but more time elapses until the normal forward traveling state is reached after reverse traveling is stopped. Therefore, a time obtained by adding a slight additional period α to T4 can be set as a period during which probe information is not collected. The additional period can be set according to the characteristics of other predetermined vehicle states.

In the embodiment, the probe information is temporarily stored in the memory 38 in the vehicle terminal 10 and is wirelessly transmitted to the traffic information center 2 at a constant time interval by the communication unit 40. However, the probe information is not temporarily stored in the memory 38. May be transmitted sequentially.
Further, the present invention is not limited to the transmission of probe information to the traffic information center 2 by wireless transmission, but the memory 38 storing the probe information or another data recording medium such as HD or DVD is directly delivered to the traffic information center 2. Means can be selected as appropriate, such as transfer to the server 3 in the information center 2.

  Further, unnecessary information is excluded by not collecting probe information during a predetermined vehicle state as in the embodiment, but there is an advantage that the memory capacity can be reduced, but there is a margin in capacity Alternatively, all the probe information may be temporarily stored in the memory 38 regardless of the vehicle state, and then unnecessary information may be removed based on the vehicle state when each piece of probe information is acquired.

  Among the evaluation of road characteristics performed at the traffic information center, the vehicle speed fluctuation is evaluated by the maximum amplitude B and the minimum cycle S as shown in FIG. Evaluation criteria can also be established.

Further, in the embodiment, the map information created in the traffic information center 2 is provided by individual communication based on a request from the mobile vehicle 1, but it is simultaneously broadcast to a large number of mobile vehicles. You may make it provide.
Furthermore, as in the case of transmitting probe information to the traffic information center, the map information may be provided from the traffic information center by distributing data recording media such as HD and DVD, not limited to wireless communication.

It is a conceptual diagram which shows embodiment of this invention. It is a block diagram which shows the structure of a vehicle terminal. It is a conceptual diagram which shows the probe information exclusion period at the time of sudden start and stop of a vehicle. It is a conceptual diagram which shows the probe information exclusion period at the time of extreme steering operation. It is a conceptual diagram which shows the probe information exclusion period at the time of reverse driving | running | working. It is a flowchart which shows the flow of a process in a probe part. It is a conceptual diagram of evaluation of a vehicle speed fluctuation | variation. It is a figure which shows the parameter of evaluation of a vehicle speed fluctuation | variation. It is a conceptual diagram of the evaluation policy concerning the sum total of vehicle speed fluctuation amount. It is a conceptual diagram of the other evaluation policy concerning the sum total of vehicle speed fluctuation amount. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile vehicle 2 Traffic information center 3 Server 4 GPS satellite 5 Beacon 10 Vehicle terminal 11 Vehicle speed sensor 12 GPS receiving part 13 Beacon receiving part 14 Display 15 Speaker 20 Navigation part 22 Current position detection part 24 Road map database 26 Guidance information storage part 30 Probe unit 32 Traveling track calculation unit 34 Traveling distance calculation unit 36 Traveling timer 38 Memory 40 Communication unit 51 Steering angle sensor 52 Shift lever position sensor 53 Altitude sensor 54 Airbag sensor 55 Seat sensor 56 Acceleration sensor 57 Direction sensor

Claims (6)

A vehicle terminal equipped with a probe unit that is mounted on a moving vehicle and sequentially collects probe information related to the traveling environment;
A server for storing the probe information collected at the vehicle terminal, and a traffic information center for creating map information based on the stored probe information;
The probe unit determines whether or not the host vehicle is in a predetermined vehicle state, and determines that the host vehicle is not in a normal traveling state when the host vehicle is in the predetermined vehicle state. A collection interruption means for interrupting the collection of the probe information while the vehicle is not in a normal running state when it is determined that the host vehicle is not in a normal running state;
The predetermined vehicle state is a state in which a change in vehicle speed corresponding to a sudden start or sudden stop state of the vehicle is detected,
The map information created based on the probe information in the traffic information center includes an evaluation value of road characteristics,
The evaluation value of the road characteristic is composed of a maximum amplitude B of the vehicle speed fluctuation, a minimum period S of the vehicle speed fluctuation, and a sum G of the vehicle speed fluctuation amounts, and the minimum period S of the vehicle speed fluctuation is smaller as the maximum amplitude B of the vehicle speed fluctuation is smaller. The navigation information system is characterized in that the evaluation value becomes a better evaluation as the vehicle length becomes longer or the total sum G of vehicle speed fluctuation amounts becomes smaller. A vehicle terminal equipped with a probe unit that is mounted on a moving vehicle and sequentially collects probe information related to the traveling environment;
A server for storing the probe information collected at the vehicle terminal, and a traffic information center for creating map information based on the stored probe information;
The probe unit determines whether or not the host vehicle is in a predetermined vehicle state, and determines that the host vehicle is not in a normal traveling state when the host vehicle is in the predetermined vehicle state. A collection interruption means for interrupting the collection of the probe information while the vehicle is not in a normal running state when it is determined that the host vehicle is not in a normal running state;
The predetermined vehicle state is a state in which a change speed of a steering angle corresponding to an extreme steering operation state is detected,
The map information created based on the probe information in the traffic information center includes an evaluation value of road characteristics,
The evaluation value of the road characteristic is composed of a maximum amplitude B of the vehicle speed fluctuation, a minimum period S of the vehicle speed fluctuation, and a sum G of the vehicle speed fluctuation amounts, and the minimum period S of the vehicle speed fluctuation is smaller as the maximum amplitude B of the vehicle speed fluctuation is smaller. The navigation information system is characterized in that the evaluation value becomes a better evaluation as the vehicle length becomes longer or the total sum G of vehicle speed fluctuation amounts becomes smaller. A vehicle terminal equipped with a probe unit that is mounted on a moving vehicle and sequentially collects probe information related to the traveling environment;
A server for storing the probe information collected at the vehicle terminal, and a traffic information center for creating map information based on the stored probe information;
The probe unit determines whether or not the host vehicle is in a predetermined vehicle state, and determines that the host vehicle is not in a normal traveling state when the host vehicle is in the predetermined vehicle state. A collection interruption means for interrupting the collection of the probe information while the vehicle is not in a normal running state when it is determined that the host vehicle is not in a normal running state;
The predetermined vehicle state is a state where a shift lever position corresponding to the reverse running state is detected,
The map information created based on the probe information in the traffic information center includes an evaluation value of road characteristics,
The evaluation value of the road characteristic is composed of a maximum amplitude B of the vehicle speed fluctuation, a minimum period S of the vehicle speed fluctuation, and a sum G of the vehicle speed fluctuation amounts, and the minimum period S of the vehicle speed fluctuation is smaller as the maximum amplitude B of the vehicle speed fluctuation is smaller. The navigation information system is characterized in that the evaluation value becomes a better evaluation as the vehicle length becomes longer or the total sum G of vehicle speed fluctuation amounts becomes smaller. A vehicle terminal equipped with a probe unit that is mounted on a moving vehicle and sequentially collects probe information related to the traveling environment;
A server for storing the probe information collected at the vehicle terminal, and a traffic information center for creating map information based on the stored probe information;
The probe unit determines whether or not the host vehicle is in a predetermined vehicle state, and determines that the host vehicle is not in a normal traveling state when the host vehicle is in the predetermined vehicle state. A collection interruption means for interrupting the collection of the probe information while the vehicle is not in a normal running state when it is determined that the host vehicle is not in a normal running state;
The predetermined vehicle state is a state in which an abnormal value state of a sensor that acquires probe information is detected,
The map information created based on the probe information in the traffic information center includes an evaluation value of road characteristics,
The evaluation value of the road characteristic is composed of a maximum amplitude B of the vehicle speed fluctuation, a minimum period S of the vehicle speed fluctuation, and a sum G of the vehicle speed fluctuation amounts, and the minimum period S of the vehicle speed fluctuation is smaller as the maximum amplitude B of the vehicle speed fluctuation is smaller. The navigation information system is characterized in that the evaluation value becomes a better evaluation as the vehicle length becomes longer or the total sum G of vehicle speed fluctuation amounts becomes smaller. 5. The navigation information system according to claim 4, wherein the sensor is a vehicle speed sensor, and the abnormal value state is a state in which an output state of the vehicle speed sensor is detected when the wheel is idling, slipping or sliding. . The vehicle terminal the traffic information center and a wireless communicable communication unit, according to claim 1-5 where the probe information collected by the probe unit and transmits to the traffic information center through the communication unit The navigation information system according to any one of the above.

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