JP6590059B2 - Vehicle automatic operation control system - Google Patents

Description

  The present invention relates to a vehicle automatic driving control system.

  An automatic driving control unit that controls automatic driving, a recognition unit that recognizes the driver's arousal level, and an alarm unit that prompts the driver to awaken when the recognized arousal level falls below a predetermined level. An automatic driving control system for a vehicle capable of switching between driving and automatic driving is known (for example, see Patent Document 1).

JP-A-6-171391

  Incidentally, as will be described later in detail, it is not necessarily fixed how much the automatic driving of the vehicle can be appropriately performed, that is, how reliable the output of the automatic driving control unit is. That is, when the automatic driving control unit identifies the position of the host vehicle using a signal from, for example, GPS (Global Positioning System) and performs automatic driving based on the identification result, when the signal from GPS can be received satisfactorily, The automatic driving control unit can accurately identify the position of the host vehicle, and thus can appropriately perform automatic driving. That is, the reliability of the output of the automatic operation control unit at this time is high. On the other hand, for example, when it is difficult to receive a GPS signal satisfactorily due to the terrain around the host vehicle, it is difficult for the automatic driving control unit to accurately identify the position of the host vehicle. Therefore, it is difficult to appropriately perform automatic driving. In other words, the reliability of the output of the automatic operation control unit at this time is low.

  When the reliability of the output of the automatic operation control unit is low, the driver's arousal level needs to be high in preparation for manual operation. Conversely, when the reliability of the output of the automatic driving control unit is high, the driver's arousal level may be low.

  However, in the above-mentioned Patent Document 1, nothing is mentioned about the reliability of the output of the automatic operation control unit. For this reason, even if the reliability of the output of the automatic driving control unit is high, the driver's arousal level is maintained higher than a predetermined level. As a result, the driver may be kept in an excessively tensioned state. In this regard, if the above-mentioned predetermined level is set low, the driver's arousal level can be kept low and the driver's excessive tension may be solved. However, in this case, if the reliability of the output of the automatic driving control unit decreases for some reason, the driver's awakening level is low at this time, so the driver is not sufficiently prepared for manual driving, and thus the driver is confused. There is a fear.

  Therefore, when the degree of caution with respect to the driver's automatic driving is referred to as driver caution, an object of the present invention is to provide an automatic driving control system for a vehicle that can appropriately maintain the driver's caution regardless of the automatic driving output reliability. It is to provide.

  According to one aspect of the present invention, a vehicle that includes a driver state sensor that detects the state of a driver, a display unit that can be visually recognized by the driver, and an electronic control unit that can switch between manual driving and automatic driving. The electronic control unit includes an automatic operation control unit configured to control automatic operation, and an automatic operation output reliability indicating a degree of reliability of the output of the automatic operation control unit. A reliability calculation unit configured to calculate the degree of driver; and a driver degree of importance representing a degree of driver caution with respect to the automatic driving is calculated based on the state of the driver detected by the driver state sensor The precaution calculation unit and the display unit are controlled to display the automatic operation output reliability and the driver precaution simultaneously on the display unit. And a display control unit configured to, automatic operation control system for a vehicle is provided.

  Regardless of the automatic operation output reliability, the driver's precaution can be appropriately maintained.

It is a figure which shows the block diagram of the automatic driving | operation control system of the vehicle of 1st Example by this invention. It is the schematic explaining the external sensor of 1st Example by this invention. It is the schematic explaining the internal sensor of 1st Example by this invention. It is a figure which shows the block diagram of the automatic driving | operation control part of 1st Example by this invention. It is the schematic explaining the function of an automatic driving | operation control part. It is a figure which shows the map of an area | region part. It is a figure explaining the action control of 1st Example by this invention. It is a figure explaining the action control of 1st Example by this invention. It is a figure which shows the map of the strength of the action with respect to a driver. It is a flowchart which shows the action control routine of 1st Example by this invention. It is a figure which shows the map of the area | region part of another Example by this invention. It is a figure which shows the map of the area | region part of another Example by this invention. It is a figure which shows the map of the area | region part of another Example by this invention. It is a figure which shows the map of the area | region part of another Example by this invention. It is a figure which shows the map of the area | region part of another Example by this invention. It is a figure which shows the map of the area | region part of another Example by this invention. It is a figure which shows the block diagram of the automatic driving | operation control system of the vehicle of 2nd Example by this invention. It is a figure which shows the map of a lower limit target precaution. It is a figure explaining the action control of 2nd Example by this invention. It is a figure which shows the map of the strength of the action with respect to a driver. It is a figure which shows the map of the strength of the action with respect to a driver. It is a flowchart which shows the action control routine of 1st Example by this invention. It is a figure which shows the block diagram of the automatic driving | operation control system of the vehicle of 3rd Example by this invention. It is the schematic which shows an example of the display in the display part of 3rd Example by this invention. It is a figure explaining the display function of 3rd Example by this invention. It is a figure explaining the display function of 3rd Example by this invention. It is a figure explaining the display function of 3rd Example by this invention. It is a figure explaining the display function of 3rd Example by this invention. It is a flowchart which shows the display control routine of 3rd Example by this invention. It is the schematic which shows another example of the display in a display part. It is the schematic which shows another example of the display in a display part. It is the schematic which shows another example of the display in a display part.

  FIG. 1 shows a block diagram of a vehicle automatic driving control system according to a first embodiment of the present invention. Referring to FIG. 1, an automatic driving control system for a vehicle includes an external sensor 1, a GPS receiver 2, an internal sensor 3, a map database 4, a storage device 5, a navigation system 6, an HMI (Human Machine Interface) 7, and various actuators 8. , A driver state sensor 9, a working unit 10, and an electronic control unit (ECU) 20.

  The external sensor 1 is a detection device for detecting information outside or around the host vehicle. The external sensor 1 includes at least one of a rider (LIDAR: Laser Imaging Detection and Ranging), a radar (Radar), and a camera. In the first embodiment according to the present invention, as shown in FIG. 2, the external sensor 1 includes a rider SO1, a radar SO2, and a camera SO3.

  The rider SO1 is a device that uses a laser beam to detect a road on which the vehicle is traveling and an obstacle outside the vehicle. In the example shown in FIG. 2, the rider SO <b> 1 is installed on the roof of the vehicle V. The rider SO1 sequentially irradiates laser light toward the entire periphery of the host vehicle V, measures the distance from the reflected light to obstacles on and around the road, and roads and obstacles around the host vehicle V. Are detected in the form of a three-dimensional image. Three-dimensional images of roads and obstacles detected by the rider SO1 are transmitted to the electronic control unit 20. On the other hand, the radar SO2 is a device that detects an obstacle outside the host vehicle V using radio waves. In the example shown in FIG. 2, the radar SO2 is attached to bumpers before and after the vehicle V. The radar SO2 emits a radio wave from the radar SO2 around the host vehicle V, and measures the distance from the reflected wave to an obstacle around the host vehicle V. Obstacle information detected by the radar SO2 is transmitted to the electronic control unit 20. In the example shown in FIG. 2, the camera SO <b> 3 includes a front camera provided inside the windshield of the vehicle V. The front camera SO3 performs color photographing in front of the host vehicle V, and color photographing information by the front camera SO3 is transmitted to the electronic control unit 20. As described above, the rider SO1 and the radar SO2 measure the distance to obstacles around the host vehicle V, and therefore one or both of them are also referred to as distance measuring sensors.

  Referring to FIG. 1 again, the GPS receiver 2 receives signals from three or more GPS satellites, and thereby detects the absolute position of the host vehicle V (for example, the latitude and longitude of the host vehicle V). The absolute position information of the host vehicle V detected by the GPS receiver 2 is transmitted to the electronic control unit 20.

  The internal sensor 3 is a detection device for detecting the traveling state of the host vehicle V. The traveling state of the host vehicle V is represented by at least one of the speed, acceleration, and posture of the host vehicle. The internal sensor 3 includes one or both of a vehicle speed sensor and an IMU (Internal Measurement Unit). In the first embodiment according to the present invention, the internal sensor 3 includes a vehicle speed sensor and an IMU. The vehicle speed sensor detects the speed of the host vehicle V. The IMU includes, for example, a three-axis gyro and a three-direction acceleration sensor, detects the three-dimensional angular velocity and acceleration of the host vehicle V, and detects the acceleration and posture of the host vehicle V based on them. The traveling state information of the host vehicle V detected by the internal sensor 3 is transmitted to the electronic control unit 20.

  The map database 4 is a database related to map information. The map database 4 is stored in, for example, an HDD (Hard disk drive) mounted on the vehicle. The map information includes, for example, road position information, road shape information (for example, the types of curves and straight lines, the curvature of curves, the positions of intersections, junctions, and branch points).

  The storage device 5 stores a three-dimensional image of an obstacle detected by the rider SO1 and a road map dedicated to automatic driving created based on the detection result of the rider SO1. These three-dimensional images of obstacles and road maps are constantly or periodically updated.

  The navigation system 6 is a device that guides the host vehicle V to the destination set by the driver of the host vehicle V via the HMI 7. The navigation system 6 calculates a target route to the destination based on the current position information of the host vehicle V detected by the GPS receiver 2 and the map information in the map database 4. Information on the target route of the host vehicle V is transmitted to the electronic control unit 20.

  The HMI 7 is an interface for outputting and inputting information between the passenger of the host vehicle V and the automatic driving control system of the vehicle. In the first embodiment according to the present invention, the HMI 7 includes a display for displaying character or image information, a speaker for generating sound, and an operation button or a touch panel for an occupant to perform an input operation.

  The actuator 8 is a device for controlling the traveling operation of the host vehicle V in accordance with a control signal from the electronic control unit 20. Driving operation of the vehicle V includes driving, braking, and steering of the vehicle V. The actuator 8 includes at least one of a drive actuator, a brake actuator, and a steering actuator. The drive actuator controls the output of the engine or electric motor that provides the driving force of the vehicle V, thereby controlling the driving operation of the vehicle V. The braking actuator operates the braking device of the vehicle V, thereby controlling the braking operation of the vehicle V. The steering actuator operates the steering device of the vehicle V, thereby controlling the steering operation of the vehicle V.

  When an input operation for starting automatic driving is performed by the occupant in the HMI 7, a signal is sent to the electronic control unit 20 to start automatic driving. That is, driving, braking, and steering, which are traveling operations of the vehicle V, are controlled by the actuator 8. On the other hand, when an input operation for stopping the automatic driving is performed by the occupant in the HMI 7, a signal is sent to the electronic control unit 20 to stop the automatic driving, and at least one of the driving operations of the vehicle V is performed by the driver. Is started. In other words, automatic operation can be switched to manual operation. Note that automatic driving to manual driving is also performed when the driver operates the vehicle V during automatic driving, that is, when the driver operates the steering, when the accelerator pedal is depressed, or when the brake pedal is depressed. Can be switched to. Further, when it is determined that automatic driving is difficult during automatic driving, the driver is requested to perform manual driving via the HMI 7.

  The driver state sensor 9 is a detection device for detecting the state of the driver. The state of the driver is represented, for example, by one or both of the appearance and the internal state of the driver. The driver's appearance includes, for example, the driver's line of sight, the driver's eyelid state, the driver's face orientation, the driver's posture, whether the driver is performing a second task, whether the driver is holding the steering wheel, This is represented by at least one of the distribution of pressure (seat pressure) applied to the seat of the vehicle V and the adjustment amount of the driver seat. The driver's posture is represented by whether or not the arm is crossed and the position of the driver's hand. The second task includes actions other than the traveling operation of the vehicle V, such as an operation of a mobile phone. The amount of adjustment of the driver seat is represented by a state amount that can be adjusted by the driver, such as the position of the driver seat and the angle of the seat back portion. On the other hand, the internal state of the driver is represented by a physiological index such as the driver's heart rate, blood pressure, and skin potential.

  When the driver state is expressed by the driver's line of sight, the driver's eyelid state, the driver's face orientation, the driver's posture, whether or not the driver is performing a second task, etc., the driver state sensor is, for example, a vehicle A driver camera mounted inside V is provided. This driver camera photographs the driver. In the example shown in FIG. 3, the driver state sensor 9 includes a driver camera SD attached to the instrument panel of the vehicle V so as to face the driver D. When the driver state is expressed by whether or not the driver is holding the steering wheel, the driver state sensor 9 includes, for example, a contact sensor attached to the steering wheel. This contact sensor detects, for example, whether or not the driver is holding the steering wheel with a gripping force higher than a predetermined gripping force. When the driver's state is represented by the seating pressure distribution, the driver state sensor 9 includes a seating pressure sensor attached to the seat. This seating pressure sensor detects the seating pressure distribution. When the driver state is expressed by the state of the driver seat, the driver state sensor 9 includes a seat state sensor attached to the seat. This seat state sensor detects the state of the driver's seat. When the driver state is represented by the internal state of the driver, the driver state sensor 9 includes an internal state sensor attached to the steering, for example. This internal state sensor detects a driver's physiological index, for example. The driver status information detected by the driver status sensor 9 is transmitted to the electronic control unit 20.

  The working unit 10 is a device capable of working with a driver. The action for the driver includes, for example, at least one of a visual action, an auditory action, and a sensory action. When the action for the driver includes a visual action, the action part 10 includes a display part that is visible to the driver. The display unit includes, for example, at least one of a display and a lamp that display character information or image information. In the example shown in FIG. 3, the working unit 10 includes a display A attached to the instrument panel of the vehicle V. In the first embodiment according to the present invention, the working unit 10 and the HMI 7 are provided with a common display. In another embodiment (not shown) according to the present invention, the working unit 10 and the HMI 7 each have a separate display. On the other hand, when the action for the driver includes an auditory action, the action unit 10 includes, for example, a speaker that emits sound or voice. When the action for the driver includes a sensory action, the action unit 10 includes at least one of a vibrator that applies vibration to the driver, a driver seat adjuster that changes the angle or position of the driver's seat, and the like.

  The working unit 10 can change the strength of the working on the driver. That is, when the working unit 10 includes a display, for example, the action to the driver is strengthened by increasing the frequency of change of the image displayed on the display, and the action to the driver is reduced by decreasing the frequency. Is weakened. Alternatively, the action for the driver is strengthened by shortening the interval of change of the image or the like, and the action for the driver is weakened by extending this interval. In the case where the working unit 10 includes a speaker, for example, the action to the driver is strengthened by increasing the volume of sound emitted from the speaker, and the action to the driver is weakened by decreasing the volume of this sound. It is done. Alternatively, the action for the driver is strengthened by increasing the frequency of the sound emitted from the speaker, and the action for the driver is weakened by decreasing the frequency of the sound. In the case where the working unit 10 includes a driver seat adjuster, for example, the working of the driver is strengthened by making the direction of the back portion of the seat close to the vertical, and the direction of the back portion of the seat is made close to the horizontal. The action against is weakened.

  The electronic control unit 20 is a computer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like that are connected to each other via a bidirectional bus. As shown in FIG. 1, an electronic control unit 20 according to the first embodiment of the present invention includes a storage unit 21 having a ROM and a RAM, an automatic operation control unit 22, a reliability calculation unit 23, a precaution calculation unit 24, and A work control unit 25 is provided.

  The automatic driving control unit 22 is configured to control automatic driving of the vehicle. FIG. 4 shows a block diagram of the automatic operation control unit 22 of the first embodiment according to the present invention. Referring to FIG. 4, the automatic operation control unit 22 according to the first embodiment of the present invention includes a plurality of control units, that is, a self-position identification unit 22a, an obstacle detection unit 22b, a dynamic / static identification unit 22c, and a tracking unit. 22d, the integrated recognition part 22e, the traffic light state recognition part 22f, and the judgment / course generation part 22g. Next, the function of the automatic operation control unit 22 will be described with reference to FIG.

  Referring to FIG. 5, the self-position identification unit 22a receives information on a rough position and posture of the host vehicle V from the GPS receiving unit and the IMU, and also measures target point information around the host vehicle V. Input from the distance sensor. The self-position identifying unit 22a corrects the position and posture of the host vehicle V based on these inputs and a road map dedicated to automatic driving stored in the storage device 5. In one example, the position and orientation of the host vehicle V are corrected so that the position of the target point input from the distance measuring sensor matches the position of the target point in the road map. That is, the corrected position and orientation information of the host vehicle V is output from the host position identification unit 22a.

  On the other hand, to the obstacle detection unit 22b, information on target points around the host vehicle V is input from the distance measuring sensor, and the corrected position and posture of the host vehicle V are input from the host position identification unit 22a. The The obstacle detection unit 22b detects obstacles around the host vehicle V based on these inputs and the road map in the storage device 5. In one example, an obstacle is detected based on the difference between the target point detected by the distance measuring sensor and the target point in the road map. In another embodiment (not shown), the obstacle is detected based on whether or not the shape of the target point detected by the distance measuring sensor matches the shape of the template stored in advance. That is, information on obstacles around the host vehicle V is output from the obstacle detection unit 22b.

  Information on obstacles around the host vehicle V is input from the obstacle detection unit 22b to the dynamic / static identification unit 22c. Based on this input and the road map in the storage device 5, the dynamic / static identification unit 22c identifies whether the obstacle is a dynamic obstacle or a static obstacle. Dynamic obstacles are movable obstacles such as other vehicles and pedestrians, and static obstacles are non-movable obstacles such as buildings. That is, the dynamic obstacle information and the static obstacle information are output from the dynamic / static identification unit 22c.

  Information on the dynamic obstacle is input from the dynamic / static identification unit 22c to the tracking unit 22d. Based on this input, the tracking unit 22d tracks the movement of the dynamic obstacle and smoothes it. That is, the smoothed dynamic obstacle movement information is output from the tracking unit 22d.

  The integrated recognition unit 22e receives the corrected position and orientation information of the host vehicle V from the self-position identification unit 22a, and receives information on static obstacles from the dynamic / static identification unit 22c. Information on the movement of the completed dynamic obstacle is input from the tracking unit 22d. Based on these inputs, the integrated recognition unit 22e forms integrated vehicle exterior environment information in which various information of the external environment of the host vehicle V is integrated with each other. The integrated vehicle exterior environment information includes, for example, dynamic obstacle specific information (for example, whether the dynamic obstacle is a vehicle or a pedestrian) or static obstacle specific information (for example, static obstacle). Is a stationary vehicle or a building). That is, integrated external environment information is output from the integrated recognition unit 22e.

  A front color image is input from the front camera to the traffic light state recognition unit 22f. In the traffic light state recognition unit 22f, information on the traffic light ahead of the host vehicle V is specified. The information on the traffic light includes information such as whether there is a traffic light in front of the host vehicle V or whether the traffic light is a green light. That is, information on the state of the traffic light is output from the traffic light state recognition unit 22f.

  The determination / course generation unit 22g receives the corrected position and orientation information of the vehicle V from the self-position identification unit 22a, and the integrated vehicle environment information is input from the integrated recognition unit 22e. Obstacle movement information is input from the tracking unit 22d, and traffic signal state information is input from the traffic signal state recognition unit 22f. In the determination / route generation unit 22g, various determinations are made based on these inputs, the road map in the storage device 5, and the target route calculated by the navigation system 6, and the target route of the host vehicle V is determined. Is generated. That is, information on the target route of the host vehicle V is output from the determination / route generation unit 22g.

  Information on the target route output from the determination / route generation unit 22g, that is, the output of the automatic operation control unit 22 is input to the actuator 8. In the actuator 8, the traveling operation of the host vehicle V is controlled so that the host vehicle V travels according to the target route.

  Referring again to FIG. 1, the reliability calculation unit 23 is configured to calculate an automatic operation output reliability (reliance) indicating the degree of reliability of the output of the automatic operation control unit 22. The automatic operation output reliability is calculated in the form of a numerical value that changes continuously or stepwise.

  The alertness calculating unit 24 is configured to calculate a driver alertness (vigilance) that represents the degree of alertness of the driver with respect to automatic driving based on the state of the driver detected by the driver state sensor 9. The driver's mind is calculated in the form of a numerical value that changes continuously or stepwise.

  The action control unit 25 is configured to control the action unit 10 to control the strength of the action to the driver.

  Now, as described above, the automatic driving output reliability represents the degree of reliability of the output of the automatic driving control unit 22. In the first embodiment according to the present invention, the output of the automatic operation control unit 22 is the output of the judgment / route generation unit 22g, that is, the information on the target route, so the automatic operation output reliability is the reliability of the information on the target route. Represents the degree. That is, for example, when the target course information is accurate, the reliability of the automatic operation output is higher than when the target course information is inaccurate.

  As described with reference to FIG. 5, the output of the automatic operation control unit 22, that is, the output of the determination / course generation unit 22 g, is the output of the plurality of control units 22 a, 22 b, 22 c, 22 d, 22 e, and 22 f described above. Based on. Therefore, the automatic operation output reliability, which is the degree of reliability of the output of the automatic operation control unit 22, depends on the degree of output reliability of the control units 22a, 22b, 22c, 22d, 22e, and 22f. Therefore, in the first embodiment according to the present invention, the automatic operation output reliability is calculated based on the reliability degree of at least one of the plurality of control units 22a, 22b, 22c, 22d, 22e, 22f, and 22g. The

  Specifically, for example, when the output of the self-position identifying unit 22a, that is, the information on the position and orientation of the host vehicle V is accurate, the output of the self-position identifying unit 22a is compared to when the information is inaccurate. Therefore, the reliability of the automatic operation output is high. In this case, for example, when the number of GPS satellites receiving signals is large, the output of the self-position identifying unit 22a is more accurate than when the number of GPS satellites receiving signals is small. Alternatively, when GPS satellites receiving signals are distributed and positioned, the output of the self-position identifying unit 22a is more accurate than when GPS satellites receiving signals are gathered and positioned. Alternatively, when the number of target point information input from the distance measuring sensor is large, the output of the self-position identifying unit 22a is more accurate than when the number of target point information is small. Alternatively, when the error between the position of the target point detected by the distance measuring sensor and the position of the target point in the road map is small, the output of the self-position identifying unit 22a is more accurate than when the error is large. is there.

  Or when the information of the obstacle which is the output of the obstacle detection unit 22b is accurate, the reliability of the automatic operation output is higher than when the information is incorrect. In this case, for example, when the number of positions of the target points detected by the distance measuring sensor is large, the output of the obstacle detection unit 22b is more accurate than when the number of positions is small. Alternatively, when the sum of the squares of the differences between the position of the target point detected by the distance measuring sensor and the position of the target point in the road map is small, the obstacle detection unit 22b is larger than when the sum is large. The output of is accurate. Alternatively, when the number of matching points between the shape of the target point detected by the distance measuring sensor and the shape of the template is large, the output of the obstacle detection unit 22b is more accurate than when the number of matching points is small. is there.

  When the information on the dynamic obstacle or the information on the static obstacle, which is the output of the dynamic / static identification unit 22c, is accurate, the reliability of the automatic operation output is higher than when the information is inaccurate. . In this case, for example, when the ratio of the number of static obstacles actually detected to the number of static obstacles stored in the road map that can be detected from the position of the host vehicle V is high, The output of the dynamic / static identification unit 22c is more accurate than when the ratio is low. Alternatively, when the degree of coincidence between the shape and volume of a dynamic obstacle detected before a predetermined time and the shape and volume of the currently detected dynamic obstacle is high, the degree of coincidence is low In comparison, the output of the dynamic / static identification unit 22c is accurate.

  When the information on the movement of the smoothed dynamic obstacle, which is the output of the tracking unit 22d, is accurate, the reliability of the automatic operation output is higher than when the information is inaccurate. In this case, for example, when the position of the dynamic obstacle is estimated based on the information of the detected dynamic obstacle, and the deviation of the estimated position from the actual position of the dynamic obstacle is small, the deviation is large. Compared to the case, the output of the tracking unit 22d is more accurate.

  When the integrated vehicle exterior environment information, which is the output of the integrated recognition unit 22e, is accurate, the reliability of automatic driving output is higher than when this information is incorrect. In this case, for example, when the degree of consistency of the output of the self-position identification unit 22a, the output of the obstacle detection unit 22b, the output of the dynamic / static identification unit 22c, and the output of the tracking unit 22d is high, the consistency The output of the integrated recognition unit 22e is more accurate than when the degree of is low. For example, the obstacle detection unit 22b may detect a certain obstacle as a pedestrian, and the dynamic / static identification unit 22c may detect the obstacle as a static obstacle. In such a case, it is determined that the degree of consistency between the output of the obstacle detection unit 22b and the output of the dynamic / static identification unit 22c is low. It should be noted that such inconsistency may occur when the obstacle is a poster including a photograph of a person.

  When the information on the state of the traffic light, which is the output of the traffic light state recognition unit 22f, is accurate, the reliability of the automatic operation output is higher than when the information is inaccurate. In this case, for example, based on the current position of the host vehicle and the road map, the size of the traffic signal predicted to be detected from the current position of the host vehicle is calculated, and the size of the traffic signal actually detected by the front camera is calculated. When the deviation from the dimension is small, the output of the traffic light state recognition unit 22f is more accurate than when the deviation is large.

  In another embodiment (not shown), for example, the risk of the vehicle when it is assumed that the vehicle could not travel on the target route is calculated, and the risk is reduced if the risk is reduced or maintained. Compared to the case of increasing, the reliability of the target course, that is, the reliability of the output of the judgment / course generation unit 22g is high.

  Further, as shown in FIG. 5, the output of the automatic operation control unit 22 is obtained based on the outputs of the distance measurement sensor, the GPS reception unit, the IMU, and the front camera. Therefore, the degree of reliability of the output of the automatic driving control unit 22 also depends on the degree of reliability of the outputs of the distance measuring sensor, the GPS receiving unit, the IMU, and the front camera. Therefore, in the first embodiment according to the present invention, the automatic driving output reliability is calculated based on the reliability level of at least one of the ranging sensor, the GPS receiver, the IMU, and the front camera.

  Furthermore, the automatic driving output reliability is determined by the shape of the road on which the vehicle travels (for example, the type of a curve and a straight line, the curvature of a curve, the position of an intersection, a junction, and a branching point) and the situation around the vehicle (for example, Depending on whether the vehicle is in an intersection, whether the vehicle is in front of the station, etc.). That is, for example, when the vehicle travels on a curve, the output of the self-position identification unit 22a is more likely to be inaccurate than when the vehicle travels on a straight portion, and therefore the reliability of the automatic driving output is high. Presumed to be low. Alternatively, since it is considered that there are many pedestrians and vehicles in front of the station, when the vehicle is in front of the station, the output of the obstacle detection unit 22b may be inaccurate compared to the case where the vehicle is not. Therefore, it is estimated that the reliability of the automatic operation output is low. Therefore, in the first embodiment according to the present invention, for example, the automatic driving output reliability is stored in association with the map information in the map database 4 or the road map in the storage device 5, and the position on the map on which the host vehicle travels. The automatic operation output reliability is calculated based on the above.

  In the first embodiment according to the present invention, when the vehicle actually travels, the automatic driving output reliability calculated at this time is stored in association with the position on the map where the vehicle traveled. Next, when the vehicle travels through the position, the automatic driving output reliability associated with the position is calculated as the automatic driving output reliability at this time.

  As described above, when it is determined that automatic driving is difficult, the driver is requested to perform manual driving. In the first embodiment according to the present invention, automatic driving is determined to be difficult when the reliability of the automatic driving output is lower than a predetermined lower limit, and the driver is required to perform manual driving.

  On the other hand, as described above, the driver alertness indicates the driver's alertness for automatic driving. That is, the driver alertness indicates how well the driver is prepared for manual operation during automatic operation. Specifically, when the driver is fully prepared for manual operation, the driver's precaution is higher than when the preparation is insufficient.

  This driver alertness is calculated based on the driver state described above. Specifically, for example, when the driver's line of sight is facing the front of the vehicle V, the driver's mind is higher than when the driver is looking aside. Alternatively, when the time during which the driver's line of sight faces the front of the vehicle V is long and the driver frequently views the side mirror or the rearview mirror, the time when the driver's line of sight faces the front of the vehicle V is short, or the driver The driver's precaution is higher than when the frequency of looking at the side mirror or the rearview mirror is low. When the driver's line of sight is facing an obstacle, particularly a dynamic obstacle, the driver's alertness is higher than when this time is short. When the driver's blink frequency is high, the driver's precaution is higher than when the driver's blink frequency is low. When the driver is not arm-armed, the driver's precaution is higher than when the driver is arm-armed. When the driver is not performing a second task, the driver's precaution is higher than when the driver is performing a second task. Note that the driver alertness also depends on the type or time of the second task performed by the driver. When the driver is holding the steering wheel, the driver's precaution is higher than when the driver is not holding the steering wheel. When the deviation of the seating pressure distribution of the driver is small, the driver's mind is higher than when the deviation of the distribution is large. Alternatively, when the deviation of the seating pressure distribution of the driver with respect to a predetermined reference distribution is small, the driver's mind is higher than when the deviation is large. In one example, the reference distribution is constant. In another example, the reference distribution is set according to individual drivers. When the orientation of the backrest portion of the driver seat is nearly vertical, the driver's mind is higher than when the orientation of the backrest portion is almost horizontal. When the heart rate of the driver is high, the driver's heart rate is higher than when the heart rate of the driver is low.

  When the above-described action is performed on the driver, the driver's precautions increase. In this case, the increase in the driver's attention depends on the strength of the action against the driver. That is, when the driver's action is strong, the driver's precaution is greatly increased. When the driver's approach to the driver is weak, the driver's alertness slightly increases or hardly changes. On the other hand, when no action is taken against the driver, the driver's mind decreases with the passage of time unless the driver voluntarily performs an action to increase the driver's mind. Therefore, the driver's mind can be controlled by controlling the action to the driver.

  Now, in the first embodiment according to the present invention, at least one extending to an area where an operating point determined by the automatic driving output reliability and the driver's mind can belong so that the driver's mind becomes higher as the automatic driving output reliability becomes lower. A plurality of region portions are partitioned by book boundaries. A part of the plurality of area portions is set as the target area portion.

  In the example shown in FIG. 6, three region portions R1, R2 are formed by two boundary lines B1, B2 extending so that the driver's mind increases as the automatic driving output reliability decreases in the region to which the operating point can belong. R2 and R3 are partitioned. In FIG. 6, the automatic driving output reliability on the vertical axis increases as it goes upward, and the driver's attention on the horizontal axis increases as it goes to the left. The first boundary line B1 is on the side where the automatic driving output reliability is lower and the driver's mind is lower, and the second boundary line B2 is on the side where the automatic driving output reliability is higher and the driver's mind is higher. is there. The first region portion R1 is on the side where the automatic driving output reliability is lower and the driver precaution is lower with respect to the first boundary line B1. The second region portion R2 is between the first boundary line B1 and the second boundary line B2. The third region portion R3 is on the side where the automatic driving output reliability is higher and the driver precaution is higher with respect to the second boundary line B2.

  One of the three region portions R1, R2, and R3, specifically, the second region portion R2 is set as the target region portion RT. In FIG. 6, dots are attached to the target area portion RT. The area portions R1, R2, R3 and the target area portion RT are stored in advance in the ROM of the storage unit 21 in the form of a map shown in FIG. In the example shown in FIG. 6, the boundary lines B1 and B2 are also included in the target region portion RT.

  In addition, in the first embodiment according to the present invention, the action control unit 25 is configured to control the strength of the action on the driver so that the operating point is maintained in the target region portion RT.

  That is, as indicated by P1 in FIG. 7, when the operating point belongs to the first region portion R1, the strength of the action on the driver is controlled so that the operating point moves to the target region portion RT. Specifically, a relatively strong action is performed on the driver, whereby the driver's attention is relatively greatly increased, and thus the operating point is moved into the target region portion RT. In this case, if the action against the driver is excessively strong, the operating point is moved into the second area portion R2, and if the action against the driver is excessively weak, the operating point is the first area portion even if the driver's mind is increased. Maintained in R1. In the first embodiment according to the present invention, the strength of the action on the driver is selected so that the operating point moves into the target region portion RT. Note that even when the driver 10 works on the driver, the automatic operation output reliability does not change. Therefore, when the driver is acted on, the driver's precautions are changed while maintaining the automatic driving output reliability.

  On the other hand, when the operating point belongs to the second region portion R2 or the target region portion RT as indicated by P2 in FIG. 7, the strength of the action to the driver so that the operating point is maintained in the target region portion RT. Is controlled. Specifically, a relatively weak approach is made to the driver, thereby increasing or maintaining the driver alertness relatively small, so that the operating point is maintained within the target area portion RT.

  When the operating point belongs to the third region portion R3 outside the target region portion RT as indicated by P3 in FIG. 7, the strength of the action to the driver is controlled so that the operating point moves to the target region portion RT. Is done. Specifically, when the operating point belongs to the third region portion R3, the strength of the action against the driver is set to zero, that is, the action against the driver is stopped. As described above, if the driver is not acted on, the driver's alertness decreases with time. Therefore, the operating point will subsequently move into the target area portion RT. In another embodiment (not shown) according to the invention, when the operating point belongs to the third region portion R3, a very weak action is performed on the driver so that the operating point moves into the target region portion RT. .

  Thus, in the first embodiment according to the present invention, when the operating point moves into the first region portion R1 outside the target region portion RT or into the third region portion R3, the operating point is set to the target region portion. Returned to RT. Note that when the automatic driving output reliability decreases as shown by the arrow A1 in FIG. 8 or when the driver precautions decrease as shown by the arrow A2 in FIG. 8, the operating point changes from the target region portion RT. Move to the first region portion R1. On the other hand, when the automatic driving output reliability increases as shown by the arrow A3 in FIG. 8 or when the driver precautions increase as shown by the arrow A4 in FIG. 8, the operating point changes from the target region portion RT. Move to the third region portion R3. Of course, the automatic driving output reliability and the driver precautions may change at the same time.

  It can be considered that the driver is excessively relaxed when the operating point belongs to the first region portion R1, and the driver is excessively tensioned when the operating point belongs to the third region portion R3. On the other hand, when the operating point belongs to the second region portion R2 or the target region portion RT, it can be considered that the driver is moderately relaxed or tensioned. Therefore, in the first embodiment according to the present invention, the strength of the action on the driver is controlled so that the driver is in an appropriate state.

  In addition, in the first embodiment according to the present invention, the target region portion RT is defined by the boundary lines B1 and B2 extending so that the driver's mentality increases as the automatic driving output reliability decreases. As the value decreases, the driver's precautions increase. For this reason, when the operating point is maintained in the target region portion RT, the driver's attention is controlled to be low when the automatic operation output reliability is high. This means that the driver is not likely to be overly nervous. On the other hand, when the automatic driving output reliability is low, the driver's precaution is controlled to be high. Therefore, there is no possibility that the driver is excessively relaxed. In this way, the driver's precaution is properly maintained regardless of whether the automatic driving output reliability is high or low.

  Thus, in the first embodiment according to the present invention, as shown in FIG. 9, when the operating point belongs to the first region portion R1, a relatively strong action is performed on the driver, and the operating point is set to the target region portion. When belonging to the RT, a relatively weak action is performed on the driver, and when the operating point belongs to the third region portion R3, no action is performed on the driver. Then, the action control unit 25 is configured to control the strength of the action on the driver so as to differ depending on the region portion to which the operating point belongs. The strength of the action for the driver is stored in advance in the ROM of the storage unit 21 in the form of a map shown in FIG. 9, for example.

  FIG. 10 shows a routine showing processing performed by the action control unit 25 of the first embodiment according to the present invention. This routine is repeatedly executed at predetermined time intervals. Referring to FIG. 10, in step 100, the automatic driving output reliability is calculated. In the subsequent step 101, the driver's attention is calculated. In the subsequent step 102, the area portion to which the operating point determined by the automatic driving output reliability and the driver's mind is assigned is determined using the map of FIG. In the subsequent step 103, the strength of the action for the driver is determined using the map of FIG. In the following step 104, the driver is acted on with the calculated strength.

  11 and 12 show another example of the boundary line. In the example shown in FIG. 6, the two boundary lines B1 and B2 are straight lines extending in parallel to each other. On the other hand, in the example shown in FIG. 11, the boundary lines B1 and B2 extend non-parallel to each other. Specifically, the boundary lines B1 and B2 extend away from each other as the automatic operation output reliability increases and the driver precautions decrease. In another example (not shown), the boundary lines B1 and B2 extend so as to approach each other as the automatic driving output reliability increases and the driver precautions decrease. On the other hand, in the example shown in FIG. 12, the boundary lines B1 and B2 are curves. Specifically, the boundary lines B1 and B2 are upwardly convex curves. In another example (not shown), the boundary lines B1 and B2 are downwardly convex curves. In yet another example (not shown), a part of the boundary lines B1 and B2 is an upward convex curve, and the rest is a downward convex curve. In still another example (not shown), a part of the boundary lines B1 and B2 is a straight line, and the rest are curved lines.

  13 to 16 show other examples of the boundary line and the target area portion, respectively. In the example shown in FIG. 6, three region portions are partitioned by two boundary lines in a region to which the operating point can belong. On the other hand, in the example shown in FIG. 13, two region portions R1 and R2 are partitioned by one boundary line B in a region to which the operating point can belong. The first region portion R1 is on the side where the automatic driving output reliability is lower and the driver precaution is lower with respect to the boundary line B. The second region portion R2 is on the side where the automatic driving output reliability is higher with respect to the boundary line B and the driver precaution is higher. In the example shown in FIG. 13, the second region portion R2 is set as the target region portion RT.

  On the other hand, in the example shown in FIGS. 14 to 16, four region portions R1, R2, R3, and R4 are partitioned by three boundary lines B1, B2, and B3 in a region to which the operating point can belong. The first region portion R1 is on the side where the automatic driving output reliability is lower and the driver precaution is lower with respect to the first boundary line B1. The second region portion R2 is between the first boundary line B1 and the second boundary line B2. The third region portion R3 is between the second boundary line B2 and the third boundary line B3. The fourth region portion R4 is on the side where the automatic operation output reliability is higher and the driver precaution is higher with respect to the third boundary line B3.

  In the example shown in FIG. 14, the third region portion R3 is set as the target region portion RT. In the example shown in FIG. 15, the second region portion R2 is set as the target region portion RT. In the example shown in FIG. 16, a plurality of region portions, that is, the second region portion R2 and the third region portion R3 are set as the target region portion RT. In this regard, it can be considered that the region portions R2 and R3 between the first boundary line B1 and the third boundary line B3 are set as the target region portion RT.

  Therefore, when the examples shown in FIG. 6 and FIG. 14 to FIG. 16 are comprehensively expressed, the region to which the operating point can belong is divided into at least three region parts by at least two boundary lines. This means that the region between the two boundary lines is set as the target region.

  In the example shown in FIG. 13, for example, when the operating point belongs to the first region portion R1, a relatively strong action is performed on the driver, and when the operating point belongs to the second region portion R2, the driver Is relatively weak, whereby the operating point is maintained in the target area portion RT. On the other hand, in the examples shown in FIGS. 14 to 16, for example, when the operating point belongs to the first region portion R1, a relatively strong action is performed on the driver, and the operating point is within the second region portion R2. When the operating point belongs to the target area portion RT, the driver is relatively weak, and when the operating point belongs to the fourth area portion R4, the driver is relatively weak. Is not performed, so that the operating point is maintained in the target area portion RT.

  Furthermore, in the example shown in FIG. 14, when focusing on the first region portion R1 and the second region portion R2 on the side where the automatic operation output reliability is lower than the target region portion RT and the driver's mind is low, The one region portion R1 is not adjacent to the target region portion RT and is relatively far from the target region portion RT. The second region portion R2 is adjacent to the target region portion RT and is relatively close to the target region portion RT. On the other hand, as described above, when the operating point belongs to the first region portion R1, the driver is relatively strong, and when the operating point belongs to the second region portion R2, the driver is relatively weak.

  On the other hand, in the example shown in FIG. 15, when focusing on the third region portion R3 and the fourth region portion R4 on the side where the automatic driving output reliability is higher than the target region portion RT and the driver's precaution is high, The third region portion R3 is adjacent to the target region portion RT and is relatively close to the target region portion RT. The fourth region portion R4 is not adjacent to the target region portion RT and is relatively far from the target region portion RT. On the other hand, as described above, when the operating point belongs to the third region portion R3, the action to the driver is relatively strong, and when the operating point belongs to the fourth region portion R4, the action to the driver is relatively weak.

  Then, in the example shown in FIG. 14 and FIG. 15, the region portions R2 and R3 close to the target region portion RT and the region portions R1 and R4 far from the target region portion by the boundary lines B1 and B3 are outside the target region portion RT. The action control unit 25 is divided, and when the operating point is outside the target region portion RT, the operating point is far from the target region portion when the operating point belongs to the region portions R2 and R3 close to the target region portion. It can be considered that the strength of the action on the driver is controlled so as to be different from each other when belonging to the region portions R1 and R4. Further, in the example shown in FIG. 14, the action control unit 25 is used when the operating point belongs to the region portions R1 and R2 on the side where the automatic driving output reliability is lower than the target region portion RT and the driver's mind is low. When the operating point belongs to the region portion R1 far from the target region portion RT, the action point for the driver is stronger than when the operating point belongs to the region portion R2 close to the target region portion RT. It will be. In the example shown in FIG. 15, the action control unit 25 operates when the operating point belongs to the region portions R3 and R4 on the side where the automatic driving output reliability is higher than the target region portion RT and the driver's attention is high. When the point belongs to the region portion R4 far from the target region portion RT, the action to the driver is weaker than when the operating point belongs to the region portion R3 close to the target region portion RT. Become. As a result, in any example, the operating point outside the target area portion RT is quickly returned into the target area portion RT.

  As described above, in the first embodiment according to the present invention, when the automatic operation output reliability is lower than a predetermined lower limit value, the driver is required to perform manual operation. In other words, when the automatic operation output reliability is higher than the lower limit value, the automatic operation is continued unless the driver spontaneously starts the manual operation. However, the reliability of the automatic operation output may be suddenly lowered, and therefore the operating point may suddenly move to the first region portion R1 outside the target region portion RT. In this case, the driver's precaution may be excessively low, and the driver may not be sufficiently prepared for manual operation. Therefore, in another embodiment (not shown) according to the present invention, whenever the time during which the automatic operation is continued exceeds a predetermined set time, the action for the driver is temporarily strengthened. The degree is temporarily raised. As a result, even if the automatic operation output reliability suddenly decreases, the driver can cope with manual operation. As an action for the driver in this case, for example, the driver is required to perform manual operation via the HMI 7. Specifically, the driver is required to perform all or part of the operations of driving, braking, and steering of the vehicle. Next, when the manual operation is performed for a certain time, for example, the automatic operation is resumed. Alternatively, the automatic operation is resumed when the driver performs an input operation for starting the automatic operation.

  By the way, for example, when the driver is wearing sunglasses or the driver is in a backlight state, it becomes difficult for the driver state sensor 9 to detect the driver state, for example, the line of sight of the driver, and therefore the driver's mind is accurately calculated. There is a risk that it will not be possible. If the driver's mind cannot be calculated accurately, the operating point cannot be determined accurately, and the region to which the operating point belongs cannot be determined accurately. On the other hand, it is preferable to continue the automatic operation even under such a situation. Therefore, in another embodiment (not shown) according to the present invention, when the driver's mind cannot be accurately calculated, the automatic operation is continued while strongly acting on the driver. Therefore, automatic driving is continued under the condition where the driver's precaution is kept high. In another embodiment (not shown) according to the present invention, manual operation is required when the driver's mind cannot be accurately calculated.

  Another example of the action for the driver will be described. When the operating point moves from the target region portion RT to the first region portion R1, the driver's action is controlled so that the operating point returns into the target region portion RT. In this case, when the movement of the operating point to the first region portion R1 is due to a decrease in the automatic operation output reliability, the type of action to the driver is controlled so as to differ depending on the cause of the decrease in the automatic operation output reliability. Is done. That is, for example, when the automatic driving output reliability decreases due to a decrease in the output accuracy of the self-position identification unit 22a, the direction of the backrest portion of the driver seat is brought closer to the vertical, thereby causing the driver to immediately start manual driving. As a result, the driver's precautions are increased. If the output accuracy of the integrated recognition unit 22e is reduced due to a decrease in the accuracy of identification of a dynamic obstacle, thereby reducing the automatic driving output reliability, or the automatic driving output reliability is reduced due to a reduction in the output accuracy of the tracking unit 22d. In this case, the driver's line of sight is guided toward the dynamic obstacle. That is, for example, when the dynamic obstacle is located on the right side of the driver, a lamp or the like located on the right side of the driver in the working unit 10 is lit or blinked. If the output accuracy of the dynamic / static identification unit 22c decreases due to the excessive number of dynamic obstacles, and the automatic operation output reliability decreases as a result, the driver can immediately start manual operation, for example, Visual or visual and auditory actions are performed. This is because it is not enough to guide the driver's line of sight. When the automatic operation output reliability decreases due to a decrease in output accuracy of the obstacle detection unit 22b, the driver is immediately requested to perform manual operation. This is because the decrease in the accuracy of the output from the obstacle detection unit 22b is likely due to a failure of the external sensor 1 or the like, and it is considered difficult to continue the automatic operation.

  Next, a second embodiment according to the present invention will be described. Hereinafter, differences from the first embodiment according to the present invention will be described.

  FIG. 17 shows a block diagram of a vehicle automatic driving control system according to a second embodiment of the present invention. Referring to FIG. 17, the electronic control unit 20 further includes a target mind degree calculator 30 and a mind degree deviation calculator 31.

  The target mind degree calculation unit 30 is configured to calculate a lower limit target mind degree that is a lower limit target value of the driver mind degree based on the automatic driving output reliability. As shown in FIG. 18, the lower limit target alertness decreases as the automatic operation output reliability increases. The lower limit target alertness is stored in advance in the ROM of the storage unit 21 in the form of a map shown in FIG.

  Referring to FIG. 17 again, the caution level deviation calculation unit 31 is configured to calculate a caution level deviation that is a deviation of the driver level of mind relative to the lower limit target level of mind. In the second embodiment of the present invention, the alertness deviation is expressed in the form of a difference (driver alertness−lower limit target alertness). In another embodiment according to the invention (not shown), the alertness deviation is expressed in the form of a ratio (mindiness deviation = driver alertness / lower limit target alertness).

  In addition, in the second embodiment according to the present invention, the action control unit 25 operates the driver so that the driver's mind is maintained at or above the lower limit target mind and differs depending on the mind deviation. Is configured to control. This will be described with reference to FIG.

  In FIG. 19, PX indicates the operating point when the automatic driving output reliability is DRX and the driver's mind is DVX, and LVL indicates the lower limit target mind that is determined according to the automatic driving output reliability. The line obtained by connecting is shown. As shown in FIG. 19, the lower limit target alertness when the automatic driving output reliability is DRX is DVL. Therefore, in the second embodiment according to the present invention, the strength of the action on the driver is controlled so that the driver's mind is equal to or higher than DVL.

  As a result, when the automatic driving output reliability is high, the driver's mind is controlled low, and when the automatic driving output reliability is low, the driver's mind is controlled high. Therefore, the driver's precaution is properly maintained both when the automatic driving output reliability is high and low.

  Further, the alertness deviation at this time is (DVX−DVL). In the second embodiment according to the present invention, the strength of the action on the driver is controlled so as to vary depending on the precaution deviation. Specifically, when the caution deviation is small, the action to the driver is controlled to be stronger than when the caution deviation is large.

  That is, in the second embodiment according to the present invention, as shown in FIG. 20, the action to the driver is controlled so as to become stronger as the precaution deviation is reduced. The strength of the action for the driver is stored in advance in the ROM of the storage unit 21 in the form of a map shown in FIG. On the other hand, in another embodiment according to the present invention, as shown in FIG. 21, when the precaution deviation is positive and zero, the action to the driver is controlled to zero, that is, the action to the driver is stopped, and the When the deviation is a negative value, the driver's action is controlled so as to become stronger as the caution deviation becomes smaller. Note that the alertness deviation is negative when the driver alertness is lower than the lower limit target alertness, and the alertness deviation is positive when the driver alertness is higher than the lower limit target alertness. is there.

  As a result, when the driver's mind is lower than the lower limit target mind, the driver mind is immediately controlled to be equal to or higher than the lower limit target mind, and when the driver mind is equal to or higher than the lower limit target mind, the driver mind is equal to or higher than the lower limit target mind. Reliably maintained.

  FIG. 22 shows a routine showing processing performed in the action control unit 25 of the second embodiment according to the present invention. This routine is repeatedly executed at predetermined time intervals. Referring to FIG. 22, in step 200, the automatic driving output reliability is calculated. In the following step 201, the driver's mind is calculated. In the subsequent step 202, for example, the lower limit target alertness is calculated using the map of FIG. In the following step 203, the alertness deviation is calculated. In the next step 204, the strength of the action for the driver is determined using the map of FIG. In the following step 205, the driver is acted on with the calculated strength.

  In the example shown in FIG. 6, the driver mentality is maintained at or above the driver centrality represented by the boundary line B1 and is maintained below the driver centrality represented by the boundary line B2. It can be thought that the strength of the action against the driver is controlled. Then, the boundary line B1 corresponds to the lower limit target mind degree that is the lower limit target of the driver mind degree, and the boundary line B2 corresponds to the upper limit target mind degree that is the upper limit target of the driver mind degree. Therefore, in another embodiment (not shown) according to the present invention, the target mind degree calculation unit 30 is configured to calculate the upper limit target mind degree that is the upper limit target of the driver mind degree based on the automatic driving output reliability. The upper limit target mind is increased as the automatic driving output reliability is lowered, and the action control unit 25 is configured so that the driver mind is maintained at the lower limit target mind or less and the upper limit target mind below, and The strength of the action to the driver is controlled so as to vary depending on the caution level deviation.

  By the way, when the time during which the automatic operation can be continued is referred to as the automatic operation continuation possible time, the automatic operation output reliability is longer when the automatic operation continuation possible time is longer than when the automatic operation continuation possible time is short. Is expensive. On the other hand, when the time required for the driver to start manual operation is referred to as “operation switching required time”, the driver's attention is higher when the operation switching required time is short than when the operation switching required time is long. Here, considering the smooth switching from the automatic operation to the manual operation, it is preferable that the operation switching required time is equal to or shorter than the automatic operation continuation possible time. Therefore, assuming that the time required for operation switching corresponds to the lower limit target caution level, maintaining the driver caution level equal to or higher than the lower limit target caution level means that the operation switching required time is maintained below the automatic operation continuation possible time. Correspond. That is, in the second embodiment according to the present invention, the strength of the action to the driver is controlled so that the operation switching required time is maintained below the automatic operation continuation possible time.

  Next, a third embodiment according to the present invention will be described. Hereinafter, differences from the second embodiment according to the present invention will be described.

  FIG. 23 shows a block diagram of a vehicle automatic driving control system according to a third embodiment of the present invention. Referring to FIG. 23, the vehicle automatic driving control system further includes a display unit 40 that is visible to the driver. The display unit 40 includes, for example, a display that displays image information. In the third embodiment according to the present invention, the display unit 40 and the HMI 7 are provided with a common display. In another embodiment (not shown) according to the present invention, the display unit 40 and the HMI 7 each have a separate display.

  On the other hand, the electronic control unit 20 further includes a display control unit 50 configured to control the display unit 40 to simultaneously display the automatic operation output reliability and the driver's mind on the display unit 40.

  FIG. 24 shows an example of display on the display unit 40. As indicated by 41r in FIG. 24, the automatic operation output reliability increases from the first end 43a to the second end 43b along the first axis 42a as the automatic operation output reliability increases. Are displayed on the display unit 40. Specifically, the automatic operation output reliability is displayed by a plurality of blocks 44r arranged along the first axis 42a between the first end 43a and the second end 43b. These blocks 44r are displayed, for example, in a lighted state or in a lighted state. As the automatic operation output reliability increases, the number of blocks 44r that are lit up is increased in order from the first end 43a side. In the example shown in FIG. 24, the lighted block 44r is drawn with hatching, and the lighted off block 44r is drawn with a broken line. Therefore, in the example shown in FIG. 24, the display unit 40 indicates that the automatic operation output reliability is in four stages out of seven stages.

  On the other hand, as indicated by 41v in FIG. 24, the driver's mind is displayed along the first axis 42a from the second end 43b toward the first end 43a as the driver mind increases. 40. Specifically, the driver's mind is displayed by a plurality of blocks 44v disposed along the first axis 42a between the first end 43a and the second end 43b. These blocks 44v are displayed, for example, in a lighted state or a lighted state. As the driver alertness increases, the number of blocks 44v that are lit up is increased in order from the second end 43b side. In the example shown in FIG. 24, the lighted block 44v is drawn with hatching, and the lighted block 44v is drawn with a broken line. Therefore, in the example shown in FIG. 24, the display unit 40 indicates that the driver's mind is in four of seven stages.

  Further, when the driver's mind is equal to the lower limit target mind, the displayed automatic driving output reliability 41r and the displayed driver mind 41v are viewed in the direction of the second axis 42b perpendicular to the first axis 42a. Thus, the automatic driving output reliability and the driver's attention are displayed on the display unit 40 so as to match each other. In the example shown in FIG. 24, the displayed automatic driving output reliability and the displayed driver's mind are coincident with each other when viewed in the direction of the second axis 42b. This is done for the following reason.

  FIG. 25 shows a case where the driver's mind is lower than the case shown in FIG. Therefore, FIG. 25 shows a case where the driver's mind is lower than the lower limit target mind. In this case, as indicated by X in FIG. 25, the displayed automatic driving output reliability 41 r and the displayed driver mentality 41 v do not overlap each other when viewed in the direction of the second axis 42 b.

  On the other hand, FIG. 26 shows a case where the driver's mind is higher than the case shown in FIG. Therefore, FIG. 26 shows a case where the driver's mind is higher than the lower limit target mind. In this case, as indicated by Y in FIG. 26, the displayed automatic driving output reliability 41r and the displayed driver mentality 41v overlap each other when viewed in the direction of the second axis 42b.

  That is, when the driver criticality is equal to or greater than the lower limit target criticality, the displayed automatic driving output reliability 41r and the displayed driver criticality 41v overlap each other, and when the driver criticality is lower than the lower limit target criticality, The displayed automatic driving output reliability 41r and the displayed driver attention 41v do not overlap each other. Accordingly, when the automatic driving output reliability and the driver's mind are displayed side by side as in the third embodiment of the present invention, the driver can easily understand whether the driver's mind is equal to or higher than the lower limit target mind. it can. For this reason, when the displayed automatic driving output reliability 41r and the displayed driver mind 41v do not overlap each other, the driver can increase the driver mind so that they overlap each other.

  FIG. 27 shows a case where the reliability of the automatic operation output is lower than the case shown in FIG. In this case, since the lower limit target alertness is high, the driver alertness needs to be high. On the other hand, FIG. 28 shows a case where the automatic operation output reliability is higher than that shown in FIG. In this case, since the lower limit target mind is low, the driver mind may be low.

  As described above, the driver's attention level is increased by the display content of the display unit 40. In this sense, the display unit 40 of the third embodiment according to the present invention also functions as the working unit 10 of the first and second embodiments of the present invention, and the display control unit 50 of the third embodiment of the present invention is It also functions as the action control unit 25 of the first and second embodiments according to the present invention.

  FIG. 29 shows a routine showing a process performed by the display control unit 50 of the third embodiment according to the present invention. This routine is repeatedly executed at predetermined time intervals. Referring to FIG. 29, in step 300, the automatic driving output reliability is calculated. In the subsequent step 301, the driver's mind is calculated. In the subsequent step 302, for example, the lower limit target alertness is calculated using the map of FIG. In the subsequent step 303, the automatic operation output reliability and the driver's precaution are displayed on the display unit 40.

  FIG. 30 shows another example of display on the display unit 40. As indicated by 41r in FIG. 30, the automatic driving output reliability is continuous from the first end 43a to the second end 43b along the first axis 42a as the automatic driving output reliability increases. Displayed by a bar heading to. In this case, the bar is displayed so that the length of the bar becomes longer as the automatic operation output reliability increases.

  On the other hand, as indicated by 41v in FIG. 30, the driver mentality is determined by a line segment from the second end 43b toward the first end 43a along the first axis 42a as the driver centrality increases. Is displayed. In this case, the line segment is displayed so as to move away from the second end portion 43b as the driver precaution is increased.

  Further, when the driver's mind is equal to the lower limit target mind, the displayed automatic driving output reliability 41r and the displayed driver mind 41v are viewed in the direction of the second axis 42b perpendicular to the first axis 42a. Thus, the automatic driving output reliability and the driver's attention are displayed on the display unit 40 so as to match each other. Therefore, when the driver's mind is equal to or higher than the lower limit target mind, the displayed automatic driving output reliability 41r and the displayed driver mind 41v overlap each other, and when the driver mind is lower than the lower limit target mind, The displayed automatic driving output reliability 41r and the displayed driver attention 41v do not overlap each other. In the example shown in FIG. 30, the displayed automatic driving output reliability 41r and the displayed driver mentality 41v overlap each other, indicating that the driver's mentality is equal to or higher than the lower limit target centrality.

  FIG. 31 shows still another example of display on the display unit 40. In the example shown in FIG. 31, the time history of the automatic driving output reliability is displayed in the form of a line graph as shown by 41r, and the time history of the automatic driving output reliability is shown in the line graph as shown by 41v. Displayed in the form.

  FIG. 32 shows another example of display on the display unit 40. In the example shown in FIG. 32, the above-described alertness deviation is displayed as indicated by 41d. In this case, the alertness deviation is displayed on the display unit 40 along the first axis 42a from the first end 43a toward the second end 43b as the alertness deviation increases. In the example shown in FIG. 32, when the alertness deviation is greater than or equal to zero, the number of blocks 44d that are lit up is increased in order from the first end 43a side as the alertness deviation increases. In other words, when the alertness deviation is smaller than zero, that is, when the driver alertness is lower than the lower limit target alertness, all the blocks 44d are turned off. As a result, the driver can easily understand whether or not the driver alertness is equal to or greater than the lower limit target alertness.

The present disclosure includes:
[Configuration 1]
A vehicle automatic driving control system capable of switching between manual driving and automatic driving, comprising a driver state sensor for detecting a driver state, a working unit capable of acting on the driver, and an electronic control unit. Because
The electronic control unit is
An automatic operation controller configured to control automatic operation; and
A reliability calculating unit configured to calculate an automatic driving output reliability representing a degree of reliability of the output of the automatic driving control unit;
A precaution calculating unit configured to calculate a driver precaution indicating the degree of driver precaution for the automatic driving based on the state of the driver detected by the driver state sensor;
An action control part configured to control the action part to control the strength of the action to the driver;
With
In an area to which an operating point determined by the automatic driving output reliability and the driver mentality can belong, a plurality of boundary lines extending so as to increase the driver mentality as the automatic driving output reliability decreases. The area part is divided,
The action control unit is configured to control the strength of an action on the driver so as to differ depending on a region part to which the operating point belongs.
Automatic driving control system for vehicles.
[Configuration 2]
A part of the plurality of region portions is set as a target region portion,
The action control unit is configured to control the strength of an action on the driver so that the operating point is maintained in the target area portion.
The automatic driving control system for a vehicle according to Configuration 1.
[Configuration 3]
At least three region portions are partitioned by at least two boundary lines in a region to which the operating point may belong,
An area part between two boundary lines among the boundary lines is set as the target area part,
The automatic driving control system for a vehicle according to Configuration 2.
[Configuration 4]
The region outside the target region portion is partitioned by the boundary line into the region portion close to the target region portion and the region portion far from the target region portion,
The action control unit is configured such that when the operating point is outside the target area part, the operating point belongs to the area part close to the target area part, and the operating point is far from the target area part. It is configured to control the strength of the action on the driver so as to be different from each other when belonging to a part,
The automatic driving control system for a vehicle according to Configuration 2 or 3.
[Configuration 5]
A vehicle automatic driving control system capable of switching between manual driving and automatic driving, comprising a driver state sensor for detecting a driver state, a working unit capable of acting on the driver, and an electronic control unit. Because
The electronic control unit is
An automatic operation controller configured to control automatic operation; and
A reliability calculating unit configured to calculate an automatic driving output reliability representing a degree of reliability of the output of the automatic driving control unit;
A precaution calculating unit configured to calculate a driver precaution indicating the degree of driver precaution for the automatic driving based on the state of the driver detected by the driver state sensor;
A target mind degree calculation unit configured to calculate a lower limit target mind degree that is a lower limit target value of the driver mind degree based on the automatic driving output reliability, wherein the lower limit target mind degree is the automatic driving. A target precaution calculator that increases as the output reliability decreases;
A caution degree deviation calculating unit configured to calculate a caution degree deviation which is a deviation of the driver caution degree with respect to the lower limit target caution degree;
An action control part configured to control the action part to control the strength of the action to the driver;
With
The action control unit is configured to control the strength of an action on the driver so that the driver's mind is maintained at or above the lower limit target mind and is different depending on the mind deviation. ,
Automatic driving control system for vehicles.
[Configuration 6]
The action control unit is configured to control the strength of the action on the driver so that the precaution deviation is small when compared with a large precaution deviation.
The automatic driving control system for a vehicle according to Configuration 5.
[Configuration 7]
A vehicle automatic driving control system capable of switching between manual driving and automatic driving, comprising a driver status sensor for detecting a driver status, a display unit visible to the driver, and an electronic control unit,
The electronic control unit is
An automatic operation controller configured to control automatic operation; and
A reliability calculating unit configured to calculate an automatic driving output reliability representing a degree of reliability of the output of the automatic driving control unit;
A precaution calculating unit configured to calculate a driver precaution indicating the degree of driver precaution for the automatic driving based on the state of the driver detected by the driver state sensor;
A display control unit configured to control the display unit to simultaneously display the automatic driving output reliability and the driver's mind on the display unit;
An automatic driving control system for a vehicle.
[Configuration 8]
The electronic control unit is a target mind degree calculation unit configured to calculate a lower limit target mind degree that is a lower limit target of the driver mind degree based on the automatic operation output reliability, and the lower limit target mind The degree further increases a target precaution degree calculation unit that increases as the automatic operation output reliability decreases,
The display control unit displays the automatic operation output reliability on the display unit so that the automatic operation output reliability increases from the first end to the second end along the first axis as the automatic operation output reliability increases. Then, as the driver mentality increases, the driver mentality is displayed from the second end toward the first end along the first axis, and further, When the lower limit target mind level is equal, the displayed automatic driving output reliability and the displayed driver mind level coincide with each other when viewed in the second axial direction perpendicular to the first axis. The automatic operation output reliability and the driver precaution are configured to be displayed.
The automatic driving control system for a vehicle according to Configuration 7.

DESCRIPTION OF SYMBOLS 9 Driver state sensor 10 Action part 20 Electronic control unit 22 Automatic operation control part 23 Reliability calculation part 24 Care degree calculation part 25 Action control part

Claims (2)

A vehicle automatic driving control system capable of switching between manual driving and automatic driving, comprising a driver status sensor for detecting a driver status, a display unit visible to the driver, and an electronic control unit,
The electronic control unit is
An automatic operation controller configured to control automatic operation; and
A reliability calculating unit configured to calculate an automatic driving output reliability representing a degree of reliability of the output of the automatic driving control unit;
A precaution calculating unit configured to calculate a driver precaution indicating the degree of driver precaution for the automatic driving based on the state of the driver detected by the driver state sensor;
A display control unit configured to control the display unit to simultaneously display the automatic driving output reliability and the driver's mind on the display unit;
An automatic driving control system for a vehicle. The electronic control unit is a target mind degree calculation unit configured to calculate a lower limit target mind degree that is a lower limit target of the driver mind degree based on the automatic operation output reliability, and the lower limit target mind The degree further increases a target precaution degree calculation unit that increases as the automatic operation output reliability decreases,
The display control unit displays the automatic operation output reliability on the display unit so that the automatic operation output reliability increases from the first end to the second end along the first axis as the automatic operation output reliability increases. Then, as the driver mentality increases, the driver mentality is displayed from the second end toward the first end along the first axis, and further, When the lower limit target mind level is equal, the displayed automatic driving output reliability and the displayed driver mind level coincide with each other when viewed in the second axial direction perpendicular to the first axis. The automatic operation output reliability and the driver precaution are configured to be displayed.
The automatic driving control system for a vehicle according to claim 1.

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