JP2001250176A - Drive information providing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a driver to speedily and accurately recognize a dangerous vehicle state with an alarm, and also accurately recognize driving operation for evading the danger with an alarm of the driving operation for handling the dangerous vehicle state. SOLUTION: This device is equipped with a vehicle manipulated variable detection part 1 which detects vehicle manipulated variables, a vehicle state quantity detection part 2 which detects vehicle state quantities, a vehicle state judgment part 4 which judges a dangerous state from the detected vehicle manipulated variables and vehicle state quantities and outputs the vehicle state and its relative vehicle operation when the danger is judged, and a display unit 5 which gives an alarm of the vehicle state and its relative vehicle operation according to the output of the judgment part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving information providing device, and more particularly to a driving information providing device for providing a driver with a vehicle state.

[0002]

2. Description of the Related Art As a conventional vehicle-mounted display device, as disclosed in Japanese Patent Application Laid-Open No. 8-178679, a driver can accurately predict whether a vehicle can turn a narrow narrow road or the like well. In order to achieve this, the traveling state of the vehicle is detected, the predicted traveling trajectory of the future vehicle is calculated based on the detected traveling state, and displayed on the head-up display device. A point group is arranged at predetermined intervals on a curve indicating a predicted travel locus of points, and a frame having a width substantially equal to the width of the vehicle is arranged while matching a point of interest to each of the point groups. Some are displayed as a bird's eye view.

[0003]

However, in the above-mentioned prior art, the traveling state of the vehicle is detected, and the predicted traveling locus of the future vehicle is calculated based on the detected traveling state and displayed on the head-up type display device. However, the vehicle-mounted display device does not judge a dangerous vehicle situation based on the detected driving state, and does not warn the vehicle operation regarding the dangerous vehicle situation. Is not disclosed.

[0004] An object of the present invention is to provide a driving information providing device that can be warned of a dangerous vehicle condition without the driver himself / herself determining whether the vehicle is in a dangerous vehicle condition. While being able to recognize the situation quickly and accurately,
In addition, it is an object of the present invention to provide a driving information providing device which can receive a warning of a driving operation to be performed in response to the dangerous vehicle situation and can accurately recognize a driving operation to avoid the danger.

Another object of the present invention is to provide a driving information providing apparatus that can more accurately avoid a danger according to the type of operation for which a driver has been warned according to the level of the danger that has been warned. .

Another object of the present invention is to provide a driving information providing apparatus capable of judging a danger that cannot be directly measured by judging the danger based on the estimated unknown vehicle state quantity.

It is another object of the present invention to provide a driving information providing apparatus which can predict a change in a vehicle situation and warn the driver more quickly, and can accurately respond to the change in the vehicle situation. It is in.

[0008]

A first feature of the present invention to achieve the above object is a vehicle operation amount detecting means for detecting a plurality of vehicle operation amounts, and a vehicle state detecting means for detecting a plurality of vehicle state amounts. Quantity detection means and a vehicle operation quantity detected by the vehicle operation quantity detection means and a vehicle state quantity detected by the vehicle state quantity detection means to determine whether the vehicle is in a dangerous state. A vehicle status judging means for outputting a situation and a vehicle operation related thereto, and an alarm means for alarming a vehicle situation and a vehicle operation relating thereto based on an output of the vehicle situation judging means are provided.

A second feature of the present invention is that the vehicle condition determining means calculates a limit value of the vehicle state quantity based on the detected vehicle state quantity, Risk calculation means for calculating the risk of the vehicle based on the limit value of the amount and the detected vehicle state amount,
Driving operation selecting means for selecting the type of operation related to the risk based on the detected vehicle operation amount, wherein the warning means warns the type of operation related to the risk together with the risk of the vehicle. In the configuration.

A third feature of the present invention is that an unknown vehicle state quantity is further determined based on the vehicle operation quantity detected by the vehicle operation quantity detection means and the vehicle state quantity detected by the vehicle state quantity detection means. Vehicle state quantity estimating means for estimating, determining whether the vehicle is in a dangerous state based on the detected vehicle operation amount, the estimated unknown vehicle state amount, and the detected vehicle operation amount. The vehicle status and the vehicle operation related to the vehicle status are output as vehicle status determination means.

[0011] A fourth feature of the present invention is that a vehicle condition and a vehicle operation related thereto are controlled based on a vehicle operation amount detected by the vehicle operation amount detection means and a vehicle state amount detected by the vehicle state amount detection means. Judgment, when it is judged to be dangerous, the vehicle condition and the vehicle operation relating to it are stored and output, and at the next new judgment, the stored previous judgment result is compared with the new judgment result to compare the two. Is related to the vehicle status determining means for outputting the previous determination result.

A fifth feature of the present invention is that a vehicle operation amount detecting means for detecting a plurality of vehicle operation amounts, a vehicle state amount detecting means for detecting a plurality of vehicle state amounts, and a vehicle position are detected. When the vehicle status and the related vehicle operation are determined based on the position information detection unit and the vehicle operation amount detected by the vehicle operation amount detection unit and the vehicle state amount detected by the vehicle state amount detection unit, and a danger is determined. Outputs the vehicle status and the vehicle operation related thereto and stores them together with the detected position information, and compares the stored previous position information with the new position information at the next new judgment. Therefore, when both are related to each other, the vehicle state determination means outputs the previous determination result.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. In the second and subsequent embodiments, the description overlapping with the first embodiment will be omitted. The same reference numerals in the drawings of the respective embodiments indicate the same or corresponding components.

First, a first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 1 is a configuration diagram showing a driving information providing device according to a first embodiment of the present invention, FIG. 2 is a diagram showing an example of a screen on a display of the driving information providing device in FIG. 1, and FIG. 3 is a driving information providing device in FIG. FIG. 2 is a configuration diagram illustrating details of a vehicle state quantity estimation unit.

In FIG. 1, reference numeral 1 denotes a vehicle operation amount detection unit;
Is a vehicle state quantity detecting section, 3 is a vehicle state quantity estimating section, 4 is a vehicle state judging section, and 5 is a display constituting alarm means. The vehicle operation amount detection unit 1 is attached to a steering wheel, an accelerator, a brake, and the like of the vehicle, and detects a plurality of vehicle operation amounts such as a steering angle, a throttle opening, and a braking force. On the other hand, the vehicle state quantity detection unit 2 is configured by various sensors for detecting vehicle movement, and detects a plurality of vehicle state quantities such as, for example, the yaw rate of the vehicle body, longitudinal and lateral acceleration, and wheel speed of each wheel. The operation amount and the state amount detected by the vehicle operation amount detection unit and the vehicle state amount detection unit are input to the vehicle state amount estimation unit 3. The state quantities not detected by the vehicle state quantity detection unit 2, such as the tire lateral force, the wheel load, and the road surface friction coefficient, are sequentially calculated and estimated by the vehicle state quantity estimation unit 3 based on the current state quantities.

The vehicle state quantity estimating section 3 has, for example, the configuration shown in FIG. 3, and includes a plurality of states including vehicle state quantities that can be measured by a vehicle motion model 15 that calculates a vehicle response from an input vehicle operation amount. Calculate the amount. The vehicle motion model 15 calculates a vehicle response based on fixed parameters 16 such as body dimensions and variable parameters 17 such as a road surface friction coefficient. Then, the vehicle state quantity obtained from the actual vehicle and the state quantity of the vehicle model are compared by the comparator 18, and the error amount is input to the variable parameter 17, and the variable parameter 17 is corrected based on this. As a result, vehicle state quantities such as the variable parameter 17 and the friction coefficient of the road surface, which are internal variables of the vehicle motion model 15, can be brought close to actual values. These various numerical values (internal variables and parameters) are output as estimated state quantities.

An example of a specific method of calculating the vehicle state quantity by the vehicle state quantity estimating unit will be described. For simplicity, this description will be made without considering the load movement of the left and right wheels, but when it is considered, it can be dealt with simply by expanding each equation to the left and right wheels.

First, the steering angle δ, the accelerator opening Dacc, and the brake fluid pressure Pbrk are inputted from the vehicle state quantity detecting section 1 as the state quantities inputted to the vehicle state quantity estimating section 3. The vehicle speed V, longitudinal acceleration ax, lateral acceleration ay, and yaw rate γ are input. The driving force Facc and the braking force Fbrk of the vehicle can be expressed by the following equations 1 and 2 using the accelerator opening Dacc and the brake fluid pressure Pbrk.

[0019]

## EQU1 ## Facc = Cacc.Dacc

[0020]

Fbrk = Cbrk · Pbrk Here, Cacc and Cbrk are coefficients for calculating the braking / driving force from the accelerator opening and the brake fluid pressure. From the above, the braking / driving forces Xf and Xr of the front and rear wheels can be expressed by the following equations (3) and (4), assuming that the front and rear braking forces are equally distributed in the front wheel drive vehicle.

[0021]

Xf = Facc−Fbrk / 2

[0022]

Xr = -Fbrk / 2 On the other hand, the load movement amount Wx in the front-rear direction of each wheel can be expressed by the following equation 5 using the front-rear acceleration ax.

[0023]

ΔWx = m · h · ax / L where m is the vehicle weight, h is the height of the center of gravity, and L is the wheelbase.

And, the cornering power K of the front and rear wheels
Consider f and Kr. If the cornering powers Kf and Kr are proportional to the load and the concept of friction circle is introduced, the size of the friction circle is expressed as μW by the road surface friction coefficient μ and the load W, so it can be seen as a function of the friction coefficient μ. become able to do. The cornering power in consideration of the above is expressed by the following equation (6).
And Equation 7.

[0025]

Kf (μ) = Kf · (1−ΔWx / Wf) · √ (1- (X
f / μWf))

[0026]

Kr (μ) = Kr · (1−ΔWx / Wf) · √ (1- (X
r / μWr)) where Wf and Wr are the loads on the front and rear wheels.

The cornering powers Kf (μ) and Kr (μ)
A motion model in the rotational direction of the vehicle is considered by using. The yaw moment of inertia of the vehicle is I, and the distance L from the center of gravity to the front and rear wheels is L
If f, Lr and the cornering force are Yf and Yr, the following equation is obtained.

[0028]

I · dγ / dt = Lf · Yf−Lr · Yr The cornering forces Yf and Yr are the aforementioned cornering powers Kf (μ) and Kr (μ) and the sideslip angle β of each wheel.
If f and βr are used, the following Expressions 9 and 10 are obtained.

[0029]

## EQU9 ## Yf = −Kf (μ) · βf

[0030]

Yr = −Kr (μ) · βr where the side slip angle β of the vehicle is the vehicle speed V, the lateral acceleration ay,
Using the yaw rate γ, the following equation 11 is obtained.

[0031]

Β = ∫ (γ−Gy / V) dt Then, the sideslip angles βf and βr are given by the following equations 12 and 13 in consideration of the motion state of the vehicle and the steering angle.

[0032]

[Expression 12] βf = β + Lf · γ / V−δ

[0033]

Βr = β−Lr · γ / V By applying the obtained Yf, Yr, βf, and βr to the equation of the motion model in the rotational direction of the vehicle, finally, the following equation 1 is obtained.
It becomes 4.

[0034]

Dγ / dt = (− Lf · Kf (μ) · (β {Lf · γ
/ V−δ) + Lr · Kr (μ) · (β {Lr · γ / V)) / I From this equation, the yaw rate γ is obtained as the state quantity of the vehicle model, and this result and the yaw rate obtained from the actual vehicle Are compared, and the friction coefficient μ of the road surface, which is a variable parameter, is corrected based on the error amount, whereby the friction coefficient μ of the road surface can be made closer to the actual value. Further, each wheel load, cornering force, slip angle, and the like obtained in the process of calculating the vehicle model are also output to the vehicle condition determination unit 4.

As shown in FIG. 1, the vehicle state quantity including the one estimated by the vehicle state quantity estimating section 3 and the detected vehicle operation quantity are input to the vehicle condition judging section 4. The vehicle condition determining unit 4 determines whether or not the vehicle has become unstable based on the information, and outputs to the display 5 the degree of danger and the vehicle operation that caused the danger.

Here, as an example of this determination, a case where the magnitude of the tire lateral force is determined will be described. In addition,
In addition, the case where the slip angle of the vehicle is equal to or larger than the threshold value, the case where the yaw rate is far from the value expected from the steering angle and the speed, and the case where these are combined can be considered.

When determining the magnitude of the tire lateral force, first, the input vehicle state quantity (in this case, the state quantity such as the road surface friction coefficient and the wheel load of each wheel) is input to the limit value calculating section 6. Thus, the limit value of the tire force is calculated. The limit value and, for example, the estimated tire force of each wheel are input to the risk calculating unit 7 and the risk is calculated according to a function defined in advance. Generally speaking, the degree of danger increases as you approach the limit of the vehicle. For example, if it is expressed as a percentage, it can be determined to be 100% at the point where the limit is exceeded. Is (estimated tire power) ÷
An equation of (limit value of tire force) × 100 can be considered.
If the calculated risk exceeds a predetermined threshold, it is determined that the vehicle is in a dangerous state, and is output together with the risk.

This will be specifically described. Limit value calculator 6
Then, the limit values Ffl and Frl are calculated from the estimated road surface friction coefficient μ and the wheel loads Wf and Wr by the following Expressions 16 and 17.

[0039]

Ffl = μ〓Wf

[0040]

Frl = μ〓Wr Then, the estimated tire forces Ff, Fr are calculated from the cornering forces Yf, Yr and the braking / driving forces Xf, Xr of the front and rear wheels by the following equations (18) and (19).

[0041]

## EQU18 ## Ff = √ (Xf ² + Yf ² )

[0042]

Equation 19] ^{Fr = √ (Xr 2 + Yr} 2) than this, the risk may be the larger of of formula 20 or formula 21 of the formula, if the value of the larger exceeds a threshold value It can be determined that the vehicle is in a dangerous state.

[0043]

[Equation 20] Ff ÷ Ffl × 100

[0044]

Fr ÷ Frl × 100 On the other hand, the operation amount detected by the vehicle operation amount detection unit 1 is input to the driving operation selection unit 8, and the time change amount of the operation amount is monitored. Then, it is determined whether the steering wheel is suddenly turned or the steering wheel is forcibly cut, abrupt braking or opening / closing of the accelerator during turning. When the danger degree calculation unit 7 determines that the state is dangerous, the danger operation may occur immediately before the dangerous state is detected from the output of the driving operation selection unit 8, that is, the dangerous state is caused. As the operation relating to the dangerous vehicle situation, the driver is warned by displaying the type of operation that caused the risk on the display 5 together with the degree of danger.

FIG. 2 schematically shows an example of the output screen of the display unit 5. If the danger level calculation unit 7 determines that the state is dangerous, the warning light 1 is turned on as shown in FIG.
9, a warning content 20 is displayed, a danger level 21 is displayed, and a warning schematic diagram 22 is displayed so that these display contents can be understood at a glance. The warning content 20 displays the type of danger (in this case, the limit of the tire) and the type of operation related thereto (in this case, steering operation).
It is possible to clearly display to the driver which of the driving operations such as the steering wheel operation and the brake operation has changed into a dangerous state due to the driving operation. Further, since the danger level 21 is displayed as a specific numerical value, the degree of danger can be displayed in a manner that is easy for the driver to understand. Further, the warning schematic diagram 22 graphically displays the estimated tire force and its limit value, and shows a more detailed portion of the danger (in this case, the type of danger (tire in this case) and the degree of danger). (A location of a dangerous tire) is also displayed, so that the driver can easily understand the problem of the vehicle operation.

It should be noted that the warning schematic diagram 22 is displayed even during normal driving, and by using it as a guide for driving operation, it is possible to more easily recognize a dangerous state for the driver. In addition, the vehicle condition determining unit 4 not only determines the magnitude of the tire force at the time of turning described as an example, but also
For example, it is desirable to determine the degree of danger with respect to the rollover limit value of the vehicle using a roll yaw moment calculated from the position of the center of gravity and the turning lateral acceleration in an RV vehicle or a truck with a high vehicle height. Furthermore, a comparison between the change in the wheel speed with respect to the change in the braking / driving force of the vehicle and the change in the estimated value of the vehicle speed indicates that a large wheel speed change occurs with respect to the change in the vehicle speed. It is also conceivable to detect that the friction coefficient is extremely reduced, and to give a warning that a sudden operation of the accelerator or the brake which causes the wheel to spin or a current traveling speed is too high. In this way, by preparing a plurality of vehicle condition determination units 4 in accordance with the amount of interest for determining the degree of danger, it is possible to give a warning to the driving vehicle for various instability factors of the vehicle.

As described above, by associating the change in the vehicle state quantity with the driving operation that causes the change, the change in the vehicle state can be presented to the driver in an easy-to-understand manner. In particular, by selecting the driving operation that caused the increase in danger and pointing it out together with the danger, it is possible to present problems related to vehicle operation in a more understandable manner, and to encourage the driver's awareness. it can.

Further, by using the display 5 of the present invention so as to be shared with the display of the car navigation system, the display can be effectively used, and the system can be made more inexpensive. By using the display 5 as a head-up display and displaying information in a forward view of the driver, information can be provided while minimizing the movement of the driver's line of sight, which contributes to driving safety. In addition, such information can be provided without using the driver's line of sight by providing a warning that also uses voice, such as reading out the contents of warnings with a warning sound or synthesized voice, so that it is possible to provide information while driving. Can contribute to the safety of

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a configuration diagram illustrating a driving information providing apparatus according to a second embodiment of the present invention.

The second embodiment differs from the first embodiment in that
Danger situation storage section 9 and situation comparison section 1 in vehicle situation judgment section 4
0 and the vehicle position detection unit 11 are added. The vehicle position detection unit 11 is, for example, a G used in car navigation.
The PS system detects the absolute position of the vehicle. Here, similarly to the first embodiment, a case where the magnitude of the tire lateral force is determined will be described as an example.

First, the state variables such as the road surface friction coefficient and the wheel load of each wheel are input from the vehicle state variable estimator 3 to the limit value calculator 6, and the limit value calculator 6 calculates the limit value of the tire force.
The limit value and the estimated tire force are input to the risk calculating unit 7, and the risk calculating unit 7 calculates the risk. If the calculated degree of risk exceeds a predetermined threshold, the vehicle is determined to be in a dangerous state, and the vehicle state quantity input during a predetermined period before and after the determination is output. The time change pattern of the changed operation amount and the position information at that time are stored in the danger situation storage unit 9. For example, the time-series data of the yaw rate at the time of turning and the change pattern of the operation (for example, the steering angle or the braking force) that has increased the danger are stored retroactively from a time determined to be danger. Keep it.

Using the time pattern change stored in the danger situation storage unit 9, the situation comparison unit 10 compares the change pattern of the time series data of the vehicle state quantity with the current position of the vehicle, so that the vehicle has previously been in danger. Alerts the driver with the type of driving operation that led to the danger prior to falling into a dangerous state. It is possible to emit. This means that, for example, if a driver has a habit of stepping on the brake when the change in the yaw rate increases, there is a risk that the wheel load will move to the front wheel side by this braking operation and spin will be induced. In the first embodiment, a warning is issued at the time of the brake operation, but in the second embodiment, a warning for the brake operation can be issued before the brake operation is performed at the second time. That is, it is possible to make the driver aware of the danger by pointing out the wrong driving habit of the driver. In addition, by comparing the current position of the vehicle, it is possible to determine that the vehicle has been previously determined to be in a dangerous state at the same position, so that driving can be performed before the vehicle enters the dangerous state. It is possible to call attention to the person.

The factors that change road surface conditions are largely due to the environment where the road surface is placed. For example, experiences that have caused dangerous situations in the past, such as poor drainage and the possibility of puddles and freezing on the northern slope. By accumulating the data, it is possible to presume the road surface condition to some extent based on the position information to call attention. In particular, it is possible to use position information more effectively by combining it with a state quantity representing weather conditions such as the presence or absence of outside air temperature and rainfall as one of the vehicle state quantities, or the state of a wiper switch as a vehicle operation quantity. it can. In addition, ITS
If external information can be obtained via communication due to the spread of the system, a more appropriate combination can be achieved by configuring the terminal device, for example, a car navigation device to obtain external information.

As described above, experience information that a dangerous state has been caused in a situation similar to the past can be reused, so that a change in the vehicle situation can be provided to the driver more quickly.
Further, by using the position information, it is possible to reuse the experience information indicating that a dangerous state has occurred in the same place in the past, so that a change in the vehicle condition can be provided to the driver more quickly.

Next, a third embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 5 is a configuration diagram showing a driving information providing device according to a third embodiment of the present invention, and FIG. 6 is a diagram showing a screen example on a display of the driving information providing device of FIG.

In the third embodiment, a road curvature detector 13 for detecting the curvature of the road ahead of the vehicle is added. The road curvature detector 13 calculates a curvature from map information of a car navigation device, calculates a road curvature from an image of a camera attached to a vehicle, and performs road-vehicle communication where road-vehicle communication is established. It is conceivable to obtain road information or to obtain a curvature based on information from a magnetic nail for detecting a curve driven on a road.

Then, the vehicle condition determining unit 4 calculates an operation amount such as a steering angle corresponding to the curvature from the road curvature obtained by the road curvature detection unit 13 by the operation amount calculation unit 14 and calculates the operation amount as the operation amount. The predicted travel locus calculation unit 12 estimates the travel locus in the case of following. The predicted travel trajectory calculation unit 12 has a model representing vehicle motion, and sequentially calculates a future vehicle state based on the input vehicle state amount and vehicle operation amount.

If the vehicle state becomes unstable within the predicted time interval and the degree of danger of the vehicle exceeds the threshold, a warning is issued to the driver. In the present embodiment, since the road curvature is known, the degree of risk is calculated based on the deviation amount when the predicted traveling trajectory deviates from the road curvature, and the vehicle May be given a warning.

Here, FIG. 6 schematically shows an example of an output screen of the display unit 5. When the danger of the vehicle exceeds the threshold, as shown in FIG. 6, the caution light 19 is turned on, the caution content 20 is displayed, the danger 21 is displayed, and the display contents can be understood at a glance. 22 is displayed as shown in FIG. Since the type of danger 20 indicates the type of danger (in this case, the possibility of not being able to turn the previous curve) and the type of operation related thereto (in this case, the current speed),
It is possible to easily display to the driver which driving operation should be performed among the driving operations such as the accelerator operation and the brake operation. Further, since the danger level 21 is displayed as a specific numerical value, the degree of danger can be displayed in a manner that is easy for the driver to understand. Thus, the driver can easily perform the corresponding driving operation. Further, the caution schematic diagram 22 graphically displays the predicted traveling locus of the future vehicle and the road shape ahead of the vehicle in a superimposed manner, and is used as a guide for the driving operation in relation to the caution content 20 and the danger level 21. It can be convenient.

Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a diagram showing an example of a screen on the display of the driving information providing apparatus according to the fourth embodiment of the present invention.

In the fourth embodiment, instead of the input from the road curvature detector 13 to the operation amount calculator 14 in the third embodiment, the input is made from the vehicle operation amount detector 1 to the operation amount calculator 14. Since other configurations are the same as those of the third embodiment, the configuration block diagram is omitted. In the fourth embodiment, a travel locus when the current vehicle operation is maintained is estimated based on the detected vehicle operation amount without using the road curvature, and it is determined whether the vehicle has become unstable. It is. Here, as the vehicle state quantity for calculating the degree of danger, in addition to the above-described tire force limit, for example, a limit value is defined for the slip angle of the vehicle body, and the vehicle turns a curve due to spin or drift out in the future. It may be predicted that it will not be cut. Display 5 of the fourth embodiment
FIG. 6 schematically shows an example of the output screen of FIG. FIG.
It is desirable to graphically display, for example, the predicted traveling locus of the future vehicle and the predicted attitude of the vehicle as shown by, as a guide for the driving operation, and to perform a warning display based on the determination result of the risk.

As described above, by estimating and presenting the degree of danger of a curve to be turned next, a warning such as lowering the vehicle speed is given in advance, so as to give a warning. It is possible to estimate future changes in the situation and provide it to the driver.

In the above-described embodiment, it is determined whether or not the vehicle is in a dangerous state based on the detected vehicle operation amount and vehicle state amount. If it is determined that the vehicle is in danger, the vehicle situation and the vehicle operation related thereto are warned. Therefore, even if the driver does not judge whether or not the vehicle is in a dangerous condition, the driver can receive a warning from the driving information providing device that the vehicle is in a dangerous condition. , And a warning of a driving operation to be taken in response to the dangerous vehicle situation is received, so that the driver can accurately recognize a driving operation to avoid the danger.

Further, the limit value of the vehicle state quantity is calculated by the limit value calculating section 6 based on the detected vehicle state quantity, and the risk of the vehicle is determined based on the calculated vehicle state quantity limit value and the detected vehicle state quantity. The degree of danger is calculated by the danger calculation unit 7, the type of operation related to the danger is selected by the driving operation selection unit 8 based on the detected vehicle operation amount, and the type of operation related to the danger is displayed together with the danger of the vehicle. Since the warning is issued by the number 5, the danger can be more accurately avoided according to the type of operation for which the driver has been warned according to the level of the danger that has been warned.

Further, an unknown vehicle state quantity is estimated by the vehicle state estimating unit based on the detected vehicle operation quantity and the vehicle state quantity, and the detected vehicle operation quantity, the estimated unknown vehicle state quantity, and the detected unknown vehicle state quantity are detected. The vehicle status determination means determines whether the vehicle is in a dangerous state based on the amount of vehicle operation, and if the vehicle is determined to be dangerous, the vehicle status and the related vehicle operation are warned on the display 5, so that direct measurement is performed. The danger can be determined based on the state quantity that cannot be performed.

When it is determined that the vehicle is in danger by the vehicle status determination unit 4, the vehicle status and the vehicle operation related thereto are stored. At the next new determination, the stored previous vehicle status and the vehicle operation related thereto are stored. Is compared with the new vehicle condition and the vehicle operation, and when both are related, the previous judgment result is warned, so that a change in the vehicle condition can be predicted and the driver can be warned more quickly. Thus, the driver can appropriately respond to changes in vehicle conditions.

Further, when the vehicle situation judging section 4 judges that there is a danger, the position information is stored together with the vehicle situation and the vehicle operation related thereto, and at the next new judgment, the stored previous position information is stored. By comparing with the new position information and when both are related, the previous judgment result is warned, so that a change in the vehicle situation can be predicted and the driver can be warned more quickly, and the driver can be notified. It is possible to accurately respond to changes in vehicle conditions.

In each of the embodiments described so far, an example has been described in which information is visually presented using a display mounted on a vehicle. However, as described above, a car navigation device is used as this display. Or a head-up display,
Further, as described above, it is also effective to issue a warning using a voice together with such a warning, such as reading out the content of a warning using a warning sound or a synthesized voice.

[0069]

According to the present invention, even if the driver himself / herself does not judge whether or not the vehicle is in a dangerous state, the driver can be warned from the driving information providing device that the vehicle is in a dangerous state. Driving information that can quickly and accurately recognize a dangerous vehicle situation, receive a warning of a driving operation that should respond to the dangerous vehicle situation, and allow the driver to accurately recognize a driving operation that should avoid the danger A providing device can be obtained.

According to the present invention, it is possible to obtain a driving information providing apparatus capable of more accurately avoiding a danger according to the type of operation for which the driver has been warned according to the level of the danger that has been warned.

According to the present invention, it is possible to obtain a driving information providing apparatus capable of judging a danger that cannot be directly measured by judging a danger based on the estimated unknown vehicle state quantity.

According to the present invention, it is possible to obtain a driving information providing apparatus that can predict a change in the vehicle condition and can alert the driver more quickly, and can respond to the change in the vehicle condition accurately. .

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a driving information providing apparatus according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an example of a screen on a display of the driving information providing device of FIG. 1;

FIG. 3 is a configuration diagram illustrating details of a vehicle state quantity estimating unit of the driving information providing device of FIG. 1;

FIG. 4 is a configuration diagram illustrating a driving information providing apparatus according to a second embodiment of the present invention.

FIG. 5 is a configuration diagram illustrating a driving information providing apparatus according to a third embodiment of the present invention.

6 is a diagram showing an example of a screen on a display device of the driving information providing device of FIG. 5;

FIG. 7 is a diagram showing an example of a screen on a display of a driving information providing apparatus according to a fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vehicle operation amount detection part, 2 ... Vehicle state amount detection part, 3 ... Vehicle state amount estimation part, 4 ... Vehicle state judgment part, 5 ... Display.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B60R 21/00 626 B60R 21/00 626G 628 628C (72) Inventor Yuzo Kadomukai 502, Kandachicho, Tsuchiura City, Ibaraki Prefecture Address Machinery Research Laboratory, Hitachi, Ltd. 3D037 FA13 FA23 FA24 FA25 FA26 FB09 5C086 AA47 AA49 AA54 BA22 DA02 DA08 EA11 EA45 FA02 FA06 FA17 FA18

Claims (5)

[Claims] 1. A vehicle operation amount detection means for detecting a plurality of vehicle operation amounts, a vehicle state amount detection means for detecting a plurality of vehicle state amounts, a vehicle operation amount detected by the vehicle operation amount detection means, and the vehicle A vehicle state determining unit that determines whether the vehicle is in a dangerous state based on the vehicle state amount detected by the state amount detecting unit, and outputs a vehicle state and a vehicle operation related thereto when the vehicle is determined to be dangerous; And a warning means for warning a vehicle condition and a vehicle operation related thereto based on the output of the driving information. 2. A vehicle operation amount detection means for detecting a plurality of vehicle operation amounts, a vehicle state amount detection means for detecting a plurality of vehicle state amounts, a vehicle operation amount detected by the vehicle operation amount detection means, and the vehicle A vehicle state determining unit that determines whether the vehicle is in a dangerous state based on the vehicle state amount detected by the state amount detecting unit, and outputs a vehicle state and a vehicle operation related thereto when the vehicle is determined to be dangerous; Alarm means for giving an alarm based on the output of the vehicle, the vehicle condition determining means calculates a limit value of the vehicle state quantity based on the detected vehicle state quantity, and the calculated vehicle state quantity Risk calculating means for calculating the risk of the vehicle based on the limit value of the vehicle and the detected vehicle state quantity, and a driving operation selection for selecting an operation type related to the risk based on the detected vehicle operation amount. Selection means, and the alarm means,
A driving information providing device, wherein the type of operation related to the degree of risk is alerted together with the degree of risk of the vehicle. 3. A vehicle operation amount detecting means for detecting a plurality of vehicle operation amounts, a vehicle state amount detecting means for detecting a plurality of vehicle state amounts, and a vehicle operation amount detected by the vehicle operation amount detecting means. Vehicle state quantity estimating means for estimating an unknown vehicle state quantity based on the vehicle state quantity detected by the vehicle state quantity detecting means; and the detected vehicle operation quantity, the estimated unknown vehicle state quantity, and the detected A vehicle condition determining unit that determines whether the vehicle is in a dangerous state based on a vehicle operation amount, and outputs a vehicle condition and a vehicle operation related thereto when the vehicle is determined to be dangerous; and a vehicle condition based on an output of the vehicle condition determining unit. And a warning means for warning a vehicle operation related thereto. 4. A vehicle operation amount detection means for detecting a plurality of vehicle operation amounts, a vehicle state amount detection means for detecting a plurality of vehicle state amounts, a vehicle operation amount detected by the vehicle operation amount detection means, and the vehicle Based on the vehicle state quantity detected by the state quantity detection means, determine the vehicle situation and the vehicle operation related thereto,
If it is determined to be dangerous, the vehicle condition and the vehicle operation related thereto are stored and output together with the determination result, and at the next new determination, the stored previous vehicle condition and the related vehicle operation and new vehicle condition and new vehicle condition are stored. A vehicle condition judging means for comparing the vehicle operation with the vehicle operation and outputting a previous judgment result when both are related to each other, and an alarming means for alarming the vehicle condition and the vehicle operation related thereto based on the output of the vehicle condition judging device And a driving information providing device. 5. A vehicle operation amount detection unit for detecting a plurality of vehicle operation amounts, a vehicle state amount detection unit for detecting a plurality of vehicle state amounts, a position information detection unit for detecting a position of the vehicle,
Based on the vehicle operation amount detected by the vehicle operation amount detection unit and the vehicle state amount detected by the vehicle state amount detection unit, the vehicle state and the vehicle operation related thereto are determined. When the vehicle operation related thereto is output and these are stored together with the detected position information, and when the next new judgment is made, the stored previous position information is compared with the new position information, and the two are related. Providing driving information, comprising: vehicle condition determining means for outputting a previous determination result; and warning means for warning a vehicle condition and a vehicle operation related thereto based on the output of the vehicle condition determining means. apparatus.