DE102012219283A1 - Method for operating at least one driver assistance system and operating device for at least one driver assistance system - Google Patents

Abstract

The invention relates to a device and a method for operating at least one driver assistance system (200) with the following method steps: detecting (S1) a driver behavior parameter of a driver by a sensor device (10); Determining (S2) a degree of performance of the driver on the basis of the detected driver behavior parameter and a predefined criterion; and operating (S3) the driver assistance system (200) based on the determined level of performance of the driver and adapting at least one threshold value for intervention by the at least one driver assistance system (200) and / or for a warning to be issued by the driver assistance system (200) based on the determined degree of performance of the driver.

Description

The invention relates to a method for operating at least one driver assistance system and to an operating device for at least one driver assistance system.

State of the art

The DE 103 50 276 A1 describes a device for fatigue warning in motor vehicles, with a driver sensor system for detecting states of fatigue of the driver and with a distance warning system, which has an environment sensor and is adapted to issue a warning signal when falling below a warning distance to a vehicle ahead and / or a control intervention in the drive and / or braking system of the vehicle, wherein the distance warning system comprises an adjusting device which is adapted to change the warning distance in dependence on the state of fatigue.

The DE 10 2005 057 267 A1 describes a method and apparatus for driver condition detection. In this case, in the method described there, the profile of a signal characterizing the driver's condition is evaluated, and in a typical course, a signal characterizing the driver's condition is generated.

The DE 102 10 130 A1 describes a method and apparatus for driver warning in which an attention level of the driver is taken into account. This level of attention, ie the driver state, is derived from the steering angle, in particular from the change in the steering angle, for example the gradient and / or the frequency of the angle changes and / or the distance of successive steering angle changes. In addition, other factors influencing the recognition of the driver's condition are described, such as the accelerator pedal position and its change.

Disclosure of the invention

The present invention provides a method for operating at least one driver assistance system according to claim 1 and an operating device for at least one driver assistance system having the features of patent claim 10.

Advantages of the invention

The idea of the invention is that the adaptation of the properties of driver assistance systems to a temporarily or permanently reduced performance of the driver or the driver is made. In this case, a driver assistance system is changed in the control so that increased by the reduced performance risk is reduced by adjusting at least one threshold of the driver assistance system and / or the resulting higher burden for the driver is compensated.

An advantage is the early support of the driver with limited performance. Furthermore, a driver's reduced reaction speed due to illness can be compensated for by issuing a warning signal earlier in time.

A further advantage of the invention is the avoidance or reduction of driving errors, which are caused by sudden or creeping occurring reduction of the driver's performance.

By adjusting the thresholds and intervention thresholds, the system can provide drivers with limited performance with a customized warning signal without overloading the driver with full performance with a variety of warning signals.

Advantageous embodiments and further developments emerge from the dependent claims and from the description with reference to the figures.

According to one embodiment of the invention, it is provided that with the adapted threshold value for the intervention of the at least one driver assistance system, a brake system of the motor vehicle is adapted and / or an engine power of the motor vehicle is limited. This allows an adapted use of the vehicle's driver assistance systems.

According to one embodiment of the invention, it is provided that the adjusted threshold value is used to adapt a warning period for the warning to be output by the driver assistance system. As a result, the safety achieved by the driver assistance systems can advantageously be improved.

According to one embodiment of the invention, it is provided that detecting the driver behavior parameter of the driver comprises monitoring a driver's steering behavior. This allows a simple and secure detection of the currently prevailing degree of driver performance.

According to one embodiment of the invention, it is provided that the detection of the driver behavior parameter of the driver electrophysiological monitoring of the driver. This allows a direct detection of the currently prevailing degree of driver performance.

According to one embodiment of the invention it is provided that a fatigue sensor is used as the sensor device. As a result, the fatigue of the driver can be determined safely and easily.

According to one embodiment of the invention, it is provided that a driving parameter sensor is used as the sensor device.

According to one embodiment of the invention it is provided that a predetermined reaction time of the driver and / or a predetermined steering behavior of the driver and / or a predetermined driver behavior of the driver is used as the predetermined criterion.

According to one embodiment of the invention, it is provided that the determination of the degree of driver's performance is performed on the basis of a comparison of a measurement data series of the detected driver behavior parameter with a measurement data series stored in a memory device.

According to one embodiment of the invention, it is provided that the operating device further has an interface device which is designed to receive a driver behavior parameter of the driver and to transmit it to the computer device. This allows a simple and detection of the currently prevailing degree of driver performance.

According to one embodiment of the invention, it is provided that the operating device further has a display device which is designed to indicate an intervention of the at least one driver assistance system and / or a warning issued by the driver assistance system. The described embodiments and developments can be combined with each other as desired.

Further possible refinements, developments and implementations of the invention also include combinations, not explicitly mentioned, of features of the invention described above or below with regard to the exemplary embodiments.

Brief description of the drawings

The accompanying drawings are intended to provide further understanding of the embodiments of the invention. They illustrate embodiments and, together with the description, serve to explain principles and concepts of the invention.

Other embodiments and many of the stated advantages will become apparent with reference to the drawings. The illustrated elements of the drawings are not necessarily shown to scale to each other.

Show it:

1 a schematic representation of an operating device according to an embodiment of the invention;

2 a schematic representation of a diagram with a function graph of a time dependence of a braking intensity for explaining the invention;

3 a schematic representation of a diagram with a function graph of a time dependence of a braking intensity for explaining the invention;

4 a schematic representation of a display device according to an embodiment of the invention; and

5 a schematic representation of a flowchart of a method for operating at least one driver assistance system according to yet another embodiment of the invention.

In the figures of the drawing, like reference numerals designate the same or functionally identical elements, components, components or method steps, unless indicated otherwise.

The 1 shows a schematic representation of an operating device according to an embodiment of the invention.

An operating facility 100 is with at least one driver assistance system 200 coupled.

The factory equipment 100 includes, for example, a sensor device 10 , which is adapted to detect a driver behavior parameter of a driver.

Furthermore, the operating device 100 a computer device 20 include, which is adapted to determine a degree of performance of the driver based on the detected driver behavior parameter and based on a predetermined criterion and the at least one driver assistance system 200 based on the determined degree Operate the driver's performance and at least one threshold for intervention of the at least one driver assistance system 200 and / or for one of the driver assistance system 200 to be issued based on the determined degree of driver performance.

The factory equipment 100 further comprises, for example, a display device 50 , an interface device 40 and a storage device 30 ,

The interface device 40 may be configured to receive a driver behavior parameter of the driver and to the computing device 20 to convey.

The ad facility 50 may be configured to intervene by the at least one driver assistance system 200 and / or one of the driver assistance system 200 to issue a warning.

The storage device 30 is for example designed to store measured data series of driver behavior parameters and / or a predetermined reaction time of the driver and / or a predetermined steering behavior of the driver and / or a predetermined driver behavior of the driver and / or another criterion as a predetermined criterion.

The computer device 20 , the storage device 30 and the interface device 40 are executed, for example, as network-connected computer units.

The computer device 20 and the storage device 30 For example, they are designed as a processor unit or as another electronic data processing unit.

A display device 50 is for example with the computer device 20 coupled and is for indicating a function of the operating device 100 intended.

The ad facility 50 may be formed as a liquid crystal display or as a liquid crystal display, the function of which is based on that liquid crystals affect the polarization direction of light when a certain amount of electrical voltage is applied.

The sensor device 10 For example, it is configured as a fatigue sensor, a driving parameter sensor, a sensor for electrophysiological monitoring or a sensor for monitoring a steering behavior of the driver.

The computer device 20 is, for example, as a microcontroller, also μController, formed, which unites not only a processor but also units for peripheral functions on a chip.

As the at least one driver assistance system 200 For example, systems such as the Electronic Stability Program, ESP for short, can be used to prevent uncontrolled oversteer or understeer, which can lead to a lane departure.

Other systems than the at least one driver assistance system 200 are used, such as those that ensure that the distance to a vehicle in front does not fall below a predetermined safety distance. Such Adaptive Cruise Control (ACC), or ACC in English, are speed control systems in motor vehicles, which in the control system include the distance to a vehicle in front as an additional feedback and manipulated variable.

Again, other than the at least one driver assistance system 200 usable systems are capable of z. B. in an overtaking the blind spot to monitor and in case there is a vehicle to warn the driver.

These systems have in common that they all have a fixed behavior, which is usually designed via an application process on the basis of predetermined thresholds and driving maneuvers.

The 2 shows a schematic representation of a diagram with a function graph of a time dependence of a braking intensity for explaining the invention.

On the x-axis of the in the 2 The y-axis represents a value of a detected braking intensity. In this case, a pedal value of a brake pedal can be detected as the detected braking intensity value.

The 2 describes the control behavior of an operating device 100 , which with at least one driver assistance system 200 coupled, wherein the operating device 100 adapted to the driver has a limited capacity. In this case, the driving mode of the motor vehicle by the operating device 100 adapted and the operating equipment 100 controls an intervention of the at least one driver assistance system 200 , in the present case a brake assist or another brake system of the motor vehicle.

At a time t0, one of the operating device 100 detected brake intensity to a certain detected brake intensity value, as shown in the brake intensity characteristic PKL1.

In the further course, this brake intensity value initially remains constant. At the time t1, a sudden increase in the braking intensity value in the braking intensity characteristic PKL1 starts. The sudden increase has been caused for example by intervention of the brake assist of the motor vehicle. Further, a threshold for increased braking intensity from the operating device 100 be lowered.

The braking intensity value reaches a peak in its further course at the time t2 and subsequently drops to a plateau value at the time t3, as shown in the braking intensity characteristic PKL1.

The sudden increase in the braking intensity value at time t2 can cause a jerk that can be felt by the driver and serve to redirect the driver's attention to driving the motor vehicle.

The Indian 2 illustrated driving mode may be configured as a driving mode with an increased perceived braking intensity for drivers with lower performance. If the driver brakes, a corresponding intense brake pressure can alert the driver and cause increased attention. As a result, the driver's attention can advantageously be redirected to the traffic situation.

The erratic course of the braking intensity characteristic PKL1 is, for example, from the operating device 100 then to control the at least one driver assistance system 200 used when the driver of the motor vehicle has a degraded or insufficient level of performance compared to a normal state.

The 3 shows a schematic representation of a diagram with a function graph of a time dependence of one of the operating device 100 detected braking intensity to explain the invention.

On the x-axis of the in the 3 In the diagram shown, the time t is plotted, the y-axis represents a value of one from the operating device 100 In this case, a pedal value of a brake pedal can be detected as the detected brake intensity value.

The 3 describes the control behavior of an operating device 100 , which with at least one driver assistance system 200 coupled, wherein the operating device 100 is in a normal state, such as is used for drivers with normal performance.

At a time t0, a braking intensity characteristic PKL2 representing the chronological progression of the braking intensity has a specific braking intensity value. In the further course, this brake intensity value initially remains constant.

At the time t1, a continuous increase in the braking intensity value of the braking intensity characteristic PKL2 starts without causing a noticeable braking pressure. This increase in the braking intensity characteristic PKL2 also extends beyond a time t2 and continues evenly up to a time t3 at which a new plateau value of the braking intensity value of the braking intensity characteristic PKL2 is reached.

The uniform course of the braking intensity characteristic PKL2 is determined by the operating device 100 of the motor vehicle, for example, then to control the at least one driver assistance system 200 used when the driver of the motor vehicle has increased compared to a normal state, or at least sufficient degree of performance.

The 4 shows a schematic representation of a display device according to an embodiment of the invention.

A display device 50 is for example on a dashboard 80 of the motor vehicle as a light display or other displays next to other instrument panels 81 . 82 designed with measuring indicators.

Furthermore, the display device 50 of the motor vehicle with an operating device for switching on and off the operating device 100 be combined.

The 5 shows a schematic representation of a flowchart of a method for operating at least one driver assistance system according to yet another embodiment of the invention.

As a first method step, a detection S1 of a driver behavior parameter of a driver is performed by a sensor device 10 ,

This determines the driver's performance. This can be done in different ways. For example, it is possible to make changes to the Detecting steering behavior via a monitoring of the steering wheel angle. Likewise, monitoring the tracking or video surveillance can be used.

Similarly, methods may be used to monitor, for example, the condition of the driver via an electrocardiogram. In addition, this can also be done by other sensors that do not necessarily belong to the vehicle, but the driver carries with him, such as a health sensor, which can be attached to the belt.

It is also possible, if there is a physical impairment before departure, that this information is stored in a mobile communication device, which is in the driver's possession and is transmitted to the vehicle as soon as the driver gets into the vehicle, for example via a Mob2Car -Communication.

Possible impairments may include, for example, fatigue, visual impairment, prolonged reaction time, limitation of mobility, in particular the ability to turn the head, drug-related or alcohol-related deficits.

As a second method step, a determination is made S2 of a degree of driver performance based on the detected driver behavior parameter and a predetermined criterion.

As a third method step, an operation S3 of the driver assistance system takes place 200 based on the determined degree of performance of the driver and adjusting at least one threshold for intervention of the at least one driver assistance system 200 and / or for one of the driver assistance system 200 warning to be given based on the determined level of driver performance.

If the driver is limited in his ability to react, driving situations are critical for him, which are easily manageable for other drivers. For this reason, thresholds for ESP control interventions can already be made from a lower activation threshold.

For normal drivers, this does not make sense, as this agility of the vehicle is too limited. For drivers with reduced performance, however, this limitation is exactly the desired effect.

The by the computer device 20 the facility 100 changed threshold can cause a change in the driving mode of the motor vehicle.

Furthermore, the changed threshold value and / or the changed driving mode of the motor vehicle can thereby be displayed to the driver by the display device 50 are displayed.

For example, a modified driving mode may include a driving mode with increased perceived braking intensity for lower performance drivers. If the driver brakes, a corresponding intense braking pressure can alert the driver and cause them to pay more attention.

The driving comfort is slightly reduced by the more intense braking for a compensation of reduced responsiveness in favor of driving safety. The driver can thereby even easier to estimate that a break for him or a break in the journey is useful and safer.

The factory equipment 100 can be designed by appropriately adjusted criteria such that the braking performance of the motor vehicle still corresponds to the driver's request and is noticeably different only for the occupants.

Furthermore, by the operating device 100 lowering a threshold for emergency braking, warning alert thresholds such as a cornering alarm, blind spot assist or side view assist, or adjusting a parking aid.

Recognizes the facility 100 reduced performance may also lower the activation thresholds for interventional emergency braking systems or warning systems. In this case, it is assumed, for example, that the driver can no longer respond in good time to the previous warning. Therefore, the warning thresholds or activation thresholds can be changed accordingly. B

Furthermore, the operating device 100 make intervention in an engine control unit of the motor vehicle based on the change of the at least one threshold and make a change in a pedal characteristic, a maximum speed or cause a shift shock.

The individual method steps of the method for checking an environmental sensor device can be repeated in any manner, such as iteratively or recursively.

Although the present invention has been described above with reference to preferred embodiments, it is not limited thereto, but modifiable in a variety of ways. In particular, the invention can be varied or modified in many ways without deviating from the gist of the invention.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10350276 A1 [0002]
• DE 102005057267 A1 [0003]
• DE 10210130 A1 [0004]

Claims (12)

Method for operating at least one driver assistance system ( 200 ) with the following method steps: detecting (S1) a driver behavior parameter of a driver by a sensor device ( 10 ); - determining (S2) a degree of driver performance based on the detected driver behavior parameter and a predetermined criterion; and - operating (S3) the driver assistance system ( 200 ) based on the determined degree of driver's performance and adjusting at least one threshold for intervention of the at least one driver assistance system ( 200 ) and / or for one of the driver assistance system ( 200 ) warning based on the determined level of driver performance. The method of claim 1, wherein the at least one adjusted threshold for intervention of the at least one driver assistance system ( 200 ) A braking system of the motor vehicle is adapted and / or an engine power of the motor vehicle is limited. Method according to one of claims 1 and 2, wherein with the at least one adjusted threshold, a warning period for the driver assistance system ( 200 ) is adjusted. The method of claim 1, wherein detecting the driver behavior parameter of the driver comprises monitoring a driver's steering behavior. Method according to one of the preceding claims, wherein the detection (S1) of the driver behavior parameter of the driver comprises an electrophysiological monitoring of the driver. Method according to one of the preceding claims, wherein as the sensor device ( 10 ) a fatigue sensor is used. Method according to one of the preceding claims, wherein as the sensor device ( 10 ) a driving parameter sensor is used. Method according to one of the preceding claims, wherein as the predetermined criterion a predetermined reaction time of the driver and / or a predetermined steering behavior of the driver and / or a predetermined driver behavior of the driver is used. Method according to one of the preceding claims, wherein the determination (S2) of the degree of driver's performance based on a comparison of a measured data series of the detected driver behavior parameter with a in a memory device ( 30 ) stored measurement data series is made. Operating equipment ( 100 ) for at least one driver assistance system ( 200 ) with: - a sensor device ( 10 ) configured to detect a driver behavior parameter of a driver; and a computer device ( 20 ), which is designed to determine a degree of performance of the driver on the basis of the detected driver behavior parameter and on the basis of a predefined criterion, and the at least one driver assistance system ( 200 ) based on the determined degree of driver's performance and at least one threshold for intervention of the at least one driver assistance system ( 200 ) and / or for one of the driver assistance system ( 200 ) to adjust based on the determined level of driver performance. Operating equipment ( 100 ) according to claim 10, wherein the operating device ( 100 ) an interface device ( 40 ), which is adapted to receive a driver behavior parameter of the driver and to the computer device ( 20 ). Operating equipment ( 100 ) according to one of claims 10 and 11, wherein the operating device ( 100 ) a display device ( 50 ), which is adapted to intervene an intervention of the at least one driver assistance system ( 200 ) and / or one of the driver assistance system ( 200 ) warning.

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