DE102006059254A1 - Driving safety system for motor vehicle, has driver monitoring device, surroundings monitoring device, motor vehicle condition monitoring device and estimation device - Google Patents

Abstract

The present invention relates to a driving safety system (1) for a vehicle (2) with a driver monitoring device (3), an environmental monitoring device (4), a vehicle state monitoring device (5) and an evaluation device (6) and a warning / Hazard avoidance device (7). It is essential to the invention that the evaluation device (6) is designed such that it can additionally process data transmitted by the driver monitoring device (3) regarding the driver's attention (8) in order to determine the potential danger. In addition, the evaluation device (6) is designed to generate and transmit categorized signals to the warning / hazard prevention device (7), wherein the categorization takes place according to whether a driver assistance system is activated or deactivated.

Description

The The invention relates to a driving safety system for a vehicle according to the preamble of claim 1.

From the DE 43 38 244 C2 a generic driving safety system for motor vehicles is known. In this case, a signal is only transmitted to a warning / danger avoidance device by an evaluation device, if it can be determined from the data supplied to the evaluation device that the driver does not perceive the dangerous situation. This non-perception by the driver can be detected, for example, by the behavior of a driver monitoring device.

Another device for warning a driver of a motor vehicle is from the DE 100 39 795 C2 known.

The Invention busy dealing with the problem, for a driving safety system of the generic type an improved embodiment specify which is a particularly reliable averting of dangerous situations allowed.

Is solved this problem by the subject-matter of independent claim 1. Advantageous embodiments are the subject of the dependent Claims.

The The invention is based on the general idea of a driving safety system a vehicle with a driver monitoring device, a Environment monitoring device, a vehicle condition monitoring device and an evaluation device and a warning / hazard prevention device equipped, which are networked with each other and wherein the evaluation device such with the monitoring devices is connected so that the determination of a potential hazard the Data of all monitoring devices can be processed. In order to bring about an effective hazard avoidance in case of need too can, it is necessary that the evaluation device adapted to the situation Generate signals that depend, for example, on whether a driver assistance system, such as cruise control, activated or disabled. For this reason, the evaluation facility is for Generation and transmission categorized signals to the warning / hazard prevention device, the categorization of the signals depending on the operating state the driver assistance systems takes place. This is of particular advantage because for example with an activated cruise control and at the same time at high speed, one emitted by the warning hazard avoidance device haptic signal in the form of a vibration of the accelerator pedal the driver not reached, because this for usually when driving with cruise control, the accelerator pedal is not touched. Such a haptic Signal on the gas pedal would thus without consequences. When activated cruise control would thus have a warning of the driver in other ways, for example by an acoustic or optical signal. In particular the visual and acoustic signals but also passenger could disturb their use as far as possible only done if in any other form no warning to the driver to convey is. The driving safety system according to the invention thereby allows an optimally adapted to the particular situation Warning of the driver, by which passenger in the motor vehicle usually undisturbed stay.

Appropriately points the driver monitoring device an image capture device for detecting a viewing direction of the driver. Due to the line of sight of the driver, the Driver monitoring device determine with appropriate software, whether the driver himself is in an attentive and awake state or whether this while open Eyes on the lane in front of him looks, but mentally not registered what is going on there. Such "daydreaming" can, for example, by a longer Time unchanged Manifest the direction of view.

at a further advantageous embodiment of the solution according to the invention the evaluation device for the transmission of haptic and / or formed acoustic and / or visual warning signals. A haptic Warning signal, for example, by a vibration of a steering handle and / or an accelerator pedal, while acoustic and / or optical Warning signals in a known manner by means of warning sound or warning lights can be realized. Haptic warning signals have the great advantage that these are also of the same in the vehicle passengers traveling normally not noticed and thereby discreetly alert the driver.

Further important features and advantages of the invention will become apparent from the Dependent claims, from the drawing and the associated Description of the figures with reference to the drawing.

It it is understood that the above and the following yet to be explained features not only in the specified combination, but also in other combinations or alone, without to leave the scope of the present invention.

A preferred embodiment of the invention is shown in the drawing and is in the following description.

The only 1 shows a motor vehicle with a driving safety system according to the invention.

Corresponding 1 has a driving safety system 1 for a motor vehicle 2 a driver monitoring device 3 , an environmental monitoring device 4 , a vehicle condition monitoring device 5 and an evaluation facility 6 and a warning / hazard prevention device 7 on. The driver monitoring device 3 serves to monitor the attention of a driver 8th while the environment monitoring device 4 for monitoring the environment, in particular for monitoring a roadway 9 serves on which the vehicle 2 moves. With the vehicle condition monitoring device 5 Driving parameters are monitored, such as a yaw rate and a longitudinal and / or lateral acceleration. The evaluation facility 6 determines a potential hazard depending on her from the environmental monitoring device 4 and the vehicle state monitor 5 supplied data and transmitted in the event of imminent danger signals to the warning / hazard prevention device 7 to carry out a hazard avoidance operation. In addition, the evaluation facility processes 6 additionally from the driver monitoring device 3 transmitted data concerning the attention of the driver 8th in identifying the potential hazard and generates categorized signals to the hazard / hazard avoidance facility 7 transmitted. The categorization of the signals takes place according to whether a driver assistance system, for example a cruise control or a distance control, is activated or deactivated.

The driver monitoring device 3 has an image capture device 10 on, with which in particular a line of sight of the driver 8th and a change of sight can be detected. In addition, the driver monitoring device indicates 3 at least one sensor for detecting an operator action of the driver 8th to a vehicle system, wherein the sensor detects, for example, an actuation of a brake pedal and / or a Gangwellhebels. On the other hand, the vehicle condition monitoring device 5 also at least one image capture device 10 ' and / or a radar system or a lidar system or sensors for determining the vehicle acceleration.

Recognizes the evaluation facility 6 Based on the signals transmitted to her a hazardous condition, it generates corresponding signals, which to the warning / hazard prevention device 7 be transmitted. Is now, for example, the cruise control of the motor vehicle 2 activated, the warning / hazard avoidance device generates 7 preferably visual or acoustic warning signals, while it emits a haptic warning signal, for example in the manner of a vibration of the accelerator pedal at a deactivated cruise control. When the cruise control is not activated, vibrating the accelerator pedal automatically causes the driver to retract the foot resting on the accelerator pedal 8th , which automatically increases the speed of the vehicle 2 is reduced. If, on the other hand, the cruise control is activated, the driver stands 8th Usually not in contact with the gas pedal, so that a vibration of the same no warning to the driver 8th would effect.

In principle, attention is paid to the driver 8th by the vehicle safety system according to the invention 1 thereby about a situation observation and a driver observation. In situational observation, monitoring of the preceding traffic takes place, for example with the radar, laser or image capture device 10 ' in order to be able to derive therefrom not only the distance and the relative speed, but also other variables about the position and the movement pattern of a preceding vehicle or other objects. With the help of the vehicle 2 Existing sensors can also track the course and parameters of the lane and the location of your own vehicle 2 received in the lane. By further vehicle-specific data (yaw rate, lateral acceleration, airspeed and steering wheel angle) you can get the trajectory of your own vehicle in the lane, with a coupling of these data can be the characteristics of the driving situation calculate.

In the driver observation it allows the monitoring of the controls in the vehicle 2 , the type of activity of the driver 8th to identify. After secondary secondary activity has been identified, the degree of distraction from the primary driving task can be estimated by comparison with a predefined table. Furthermore, duration and interruption of the secondary activity can influence the degree of distraction. In addition, the image capture device 10 be used directly by the driver 8th observed. The thus captured image data can be evaluated in different ways. In which direction does the driver turn? 8th his head and / or where is his eyes directed. The viewing time can also be taken into account. The observation of so-called primary controls also contain information about the driver's attention 8th , From a combination of steering rest and terrible steering reactions, inattention phases and long-term trends can be derived. Overall, one can both in the transverse and the longitudinal dynamics Kor Deformation patterns determine "normal behavior" and monotone requirements.The correction patterns mark the end of an inattentiveness phase, the "normal behavior" marks attentive phases and monotonous requirements. About the detection of such correction pattern is also a failure of the typical steering corrections recognizable. As a result, it can be recognized in a current situation that the driver 8th Although looking at the traffic, but no reaction is expected. Causes are phenomena like so-called daydreaming. In combination with the driving situation, the reaction pattern of the driver is then also 8th observable. This means in the distance behavior that one determines how strong the driver 8th delayed as a function of the distance, the relative velocity of the object acceleration and the driven airspeed. Further criteria are the frequencies of breaches of the safety distance and the duration of the unauthorized safety distance underruns. The situation is similar when monitoring a tracking system. In a further evaluation stage then typical driver performance data can be collected, which in addition to the typical reaction patterns and the experience of the driver 8th describe with comparable situations. This is how the driver is observed 8th solves a critical situation.

An attention guide of the driver 8th is assessed by the evaluation facility 6 initiated, which depends on the driving situation and driver observation. The evaluation function describes whether the driver 8th in a critical situation and he can not respond to it in a timely manner. If these conditions are fulfilled, then a chain of action is initiated, which depends on a driver assistance system, such as ACC Distronik, is active or not.

Gives the driver 8th even gas, can be signaled via a haptic signal on the accelerator pedal that the driving task requires his attention. In addition to attention control, the signaling also causes the driver 8th the accelerator pedal decreases and thus slows down. Is the driver 8th not connected to the gas pedal, the haptic feedback would not arrive at him. In this case, an acoustic signal is used. Does the driver run? 8th For example, to commit a driving error in the transverse direction, the warning media of a lane warning system can be used. Through a vibration in the seat or interference with the steering, the driver 8th For example, communicated the request for lateral guidance. Is also on the image capture device 10 known to the driver 8th At this moment, looking at a display, this display can send a signal to the driver 8th be passed on. This ranges from a text message or a warning symbol to hiding the ad. At these first messages to the driver 8th may be followed by an ad which the driver 8th points directly to the critical point in the traffic scenario. In the simplest way, this is possible via a display which can be installed in different ways in the instrument panel, for example as a lens root display or separate display in the direction of the typical sources of danger. Particularly preferred is a so-called "head-up display", since then the driver 8th immediately has the warning in view of the crucial object. In this case, the "head-up disply" can also be constructed as a so-called stereo headup, whereby information regarding the spatial depth can be transmitted 8th the corresponding object has seen what about the image capture device 10 is recognizable or has reacted with an adequate deceleration or steering response, the haptic, audible and visual messages can be hidden again. In addition to the adaptation of warning times to identifiable parameters of the driver 8th and the driving situation, the driver has 8th the ability to adjust the sensitivity to his individual preferences. Such an intervention possibility increases the acceptance of the overall system.

The combination of environment sensing and driver activity detection lays the foundation for the driver 8th specifically to inform or warn. Due to the extensive sensor technology, it is possible, according to the current boundary conditions, the driver 8th on haptic or acoustic or optical way to send the initial information. This multi-pronged approach brings corresponding acceptance advantages, since the acoustic warning signals must be used only in exceptional cases and thus other passengers rarely something of the attention leadership by the driving safety system 1 mitbekommt.

Another advantage lies in the downstream signaling via a visual display. Ideal are here ads in the direct field of vision of the driver 8th , Individually set can also be a warning time, allowing for attentive drivers 8th Later information is transmitted while inattentive drivers 8th be informed earlier. False warnings, in particular, can be avoided as a result of the later information since the sensors have longer time to identify the objects. This achieves a reduction of Falschwarnungen and thus a fundamental increase in the acceptance of the vehicle safety system 1 ,

Claims (4)

Driving safety system ( 1 ) for a vehicle ( 2 ), with - a driver monitoring device ( 3 ) to monitor the driver's attention ( 8th ), - an environmental monitoring device ( 4 ) for monitoring the environment in which the vehicle ( 2 ), - a vehicle condition monitoring device ( 5 ) for the monitoring of driving parameters, 6 ), which depend on the environment monitoring device ( 4 ) and the vehicle condition monitoring device ( 5 ) and that, in the event of imminent danger, signals are sent to a warning / hazard prevention device ( 7 ) for carrying out a warning / danger avoidance process, characterized in that - the evaluation device ( 6 ) is designed such that it is additionally provided by the driver monitoring device ( 3 processed data concerning the driver's attention to identify the potential hazard, 6 ) for the generation and transmission of categorized signals to the warning / hazard prevention device ( 7 ) is formed, which then takes place in the categorization, whether a driver assistance system is activated or deactivated. Driving safety system according to claim 1, characterized in that - the driver monitoring device ( 3 ) an image capture device ( 10 ) for detecting a viewing direction of the driver ( 8th ), and / or - that the driver monitoring device ( 4 ) at least one sensor for detecting an operator action of the driver ( 8th ) on a vehicle system, for example on a brake pedal and / or on a gear selector lever. Driving safety system according to claim 1 or 2, characterized in that the vehicle condition monitoring device ( 5 ) at least one image capture device ( 10 ' ) and / or a radar system and / or a lidar system and / or sensors for determining a vehicle acceleration. Driving safety system according to one of claims 1 to 3, characterized in that the evaluation device ( 6 ) and / or the warning / hazard prevention device ( 7 ) are / is designed for the transmission of haptic and / or audible and / or visual warning signals.