JP2009075648A - Driving assist device, method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving assist device, a driving assist method, and a driving assist program, capable of improving a driving posture. <P>SOLUTION: In a controller 5 correcting the posture of a driver, a contact position of the driver with a vehicle body is decided, it is decided whether the driver has a recommendation posture wherein the driver contacts with a position to be contacted during driving in a proper state or not, and the contact position corresponding to a portion not corresponding to the recommendation posture of the body of the driver is made to be vibrated when the driver does not have the recommendation posture. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a driving assistance device, a driving assistance method, and a driving assistance program.

In recent years, from the viewpoint of preventing the occurrence of an accident, an apparatus for making a driving posture of a driver an appropriate posture has been proposed.
For example, Patent Document 1 describes an apparatus that determines a deterioration in driving posture or a reduction in arousal level based on the amount of change in steering torque. When this device calculates steering torque or the like in accordance with the driver's perceptual characteristics in advance and compares the steering torque with the steering torque during driving or the like and determines that the driving posture is deteriorated or the arousal level is reduced, A warning is issued by vibrating the steering wheel.
JP-A-2005-212589

  However, when it is estimated that the driver's posture is deteriorating, even if the steering wheel is vibrated, the driver cannot immediately determine which part of the body should be improved.

  The present invention has been made in view of the above problems, and an object thereof is to provide a driving assistance device, a driving assistance method, and a driving assistance program capable of improving the driving posture.

  In order to solve the above problem, the invention according to claim 1 is a driving assist device for correcting a posture of a driver, a contact determination unit that determines a contact position when the driver contacts the vehicle body, Posture determination means for determining whether or not the driver is in a recommended posture in contact with a position to be touched during driving, and when the driver is not in the recommended posture, the driver's body And a warning means for vibrating a contact position of a part not corresponding to the recommended posture or a contact position around the part.

  According to a second aspect of the present invention, in the driving assistance device according to the first aspect, the posture determining means determines whether or not the driver is in contact with an inappropriate position that should not be touched during driving. An improper position contact determination means is provided, and the warning means is to vibrate the improper position when contact with the improper position is detected.

  According to a third aspect of the present invention, in the driving assistance device according to the first or second aspect, the posture determining means determines whether or not the driver is in contact with an appropriate position to be touched during driving. The gist includes an appropriate position contact determination means, and the warning means vibrates a contact position close to the appropriate position when the contact to the appropriate position is not detected.

  According to a fourth aspect of the present invention, in the driving assistance device according to the first aspect, the posture determining means determines whether or not the driver is in contact with an appropriate position to be touched during driving. A contact determining means; and a pressure determining means for detecting a bias of the pressure applied to the appropriate position when contact with the appropriate position is detected, and the warning means is a pressure applied to the appropriate position. The gist is to vibrate the appropriate position when it is determined that there is a bias.

According to a fifth aspect of the present invention, in the driving assistance method using the control unit that corrects the posture of the driver, the control unit determines the contact position of the driver, and the driver touches during driving. It is determined whether or not the recommended posture is in contact with the position to be appropriate, and when the driver is not in the recommended posture, contact with a portion of the driver's body that does not correspond to the recommended posture The gist is to vibrate the position or the contact position around the part.

  According to a sixth aspect of the present invention, in the driving assistance program using the control unit that corrects the posture of the driver, the control unit includes a contact determination unit that determines the contact position of the driver, and the driver Posture determining means for determining whether or not the recommended posture is in contact with the position to be touched in an appropriate state during driving, and when the driver is not in the recommended posture, the recommended body among the driver's bodies The gist is to function as a warning means for vibrating a contact position of a part not corresponding to the posture or a contact position around the part.

  According to the configuration of claim 1, when the driver is not in the recommended posture, the contact position of the part not corresponding to the recommended posture or the contact position around the part is vibrated, so which part corresponds to the recommended posture. You can immediately understand if you do not.

  According to the configuration of the second aspect, when the improper position is touched, the improper position is vibrated, so that it is possible to immediately understand which part does not correspond to the recommended posture.

  According to the configuration of claim 3, when the contact to the appropriate position is not detected, the contact position around the appropriate position is vibrated, so that it is possible to immediately understand which part does not correspond to the recommended posture. it can.

  According to the configuration of the fourth aspect, when the bias of the pressure applied to the appropriate position is detected, the appropriate position is vibrated, so that the driver can understand that there is a posture inclination.

  According to the method of claim 5, when the driver is not in the recommended posture, the contact position of the part not corresponding to the recommended posture or the contact position around the part is vibrated, so which part corresponds to the recommended posture. You can immediately understand if you do not.

  According to the program according to claim 6, when the driver is not in the recommended posture, the contact position of the part not corresponding to the recommended posture or the contact position around the part is vibrated, so which part corresponds to the recommended posture. You can immediately understand if you do not.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram of a driving assistance system 1 of the present embodiment.
The driving assistance system 1 includes a control device 5 that corrects a driving posture, a pressure sensor 6, and a vibration actuator 7. The control device 5, the pressure sensor 6 and the vibration actuator 7 are respectively mounted on the vehicle C shown in FIG. The pressure-sensitive sensor 6 is a sensor that senses the contact of the driver, and the vibration actuator 7 alerts the driver by vibration. The control device 5 includes a CPU, a RAM, a ROM, an auxiliary storage device and the like (not shown), and a driving assistance program is stored in the ROM or the auxiliary storage device. In accordance with the driving assistance program, the control device 5 determines whether or not the driver takes a recommended posture in which the driver is in contact with the position to be touched in an appropriate state based on the electric signal input from the pressure sensor 6. . The control device 5 corresponds to a driving assistance device, contact determination means, posture determination means, warning means, inappropriate position contact determination means, appropriate position contact determination means, pressure determination means, and control means.

  In the present embodiment, the pressure-sensitive sensor 6 includes two resin sheets, a spacer provided between the sheets, and a contact portion provided on each sheet. When each contact portion comes into contact with the driver D, the pressure is detected. The pressure-sensitive sensor 6 is provided at an appropriate position that contacts when the driver is in an appropriate driving posture and an inappropriate position that does not contact when the driver is in an appropriate driving posture.

  When the driver contacts the appropriate position, the pressure-sensitive sensor 6 provided at the appropriate position detects the contact and outputs a contact detection signal to the control device 5. In this case, the control device 5 does not drive the vibration actuator 7 with respect to the contact position. Further, when the driver does not contact the appropriate position, no contact detection signal is input from the detection unit 10 disposed at the appropriate position, so that the vicinity of the appropriate position that does not correspond to the recommended posture is vibrated.

  When the driver touches an inappropriate position, the pressure sensor 6 provided at the inappropriate position detects the contact and outputs a contact detection signal to the control device 5. When the control device 5 identifies the pressure-sensitive sensor 6 that has output the contact detection signal and determines that the input contact detection signal is a signal output from the pressure-sensitive sensor 6 disposed at an inappropriate position, the control device 5 It is determined that alerting is to be performed, and an inappropriate position corresponding to a part not corresponding to the recommended posture is vibrated.

  Further, the contact resistance between the contact portions of the pressure-sensitive sensor 6 changes according to the magnitude of the external pressure, and the contact resistance decreases as the applied pressure increases. The control device 5 acquires resistance values as pressure information from the detection circuit of each pressure sensor 6, and determines whether or not the difference between the resistance values of the pressure sensors 6 installed symmetrically is large. Even if a plurality of pressure-sensitive sensors 6 provided at appropriate positions detect contact, if the difference between the pressure-sensitive sensors 6 is large, it is determined that the pressure deviation is large, and the driver is alerted to decide.

The vibration actuator 7 has a movable part made of a magnet or the like. When a drive signal from the control device 5 is input, the vibration actuator 7 vibrates the movable part and prompts correction of the driving posture.
In the present embodiment, the pressure sensor 6 and the vibration actuator 7 are integrated as a detection unit 10 and provided in the vehicle interior. Specifically, as shown in FIG. 2, the detection units 10 are provided at the front door F, the steering wheel W, and the driver's seat S, respectively.

  More specifically, a plurality of detection units 10 are provided at the inappropriate position of the front door F disposed on the right side of the driver's seat S. That is, since the driver D does not need to be in contact with the door F during driving, the door F is in an inappropriate position. More specifically, the three detection units 10 are provided at the upper end of the panel of the door F. As shown in FIG. 3, when the driver D sitting on the driver's seat S puts his arm on the upper end of the door panel, It is placed at a position where the arm can easily touch. When the contact detection signal is input from these detection units 10, the control device 5 vibrates the vibration actuator 7 of the detection unit 10 that detects the contact. Accordingly, the driver D can immediately determine that the position of the arm is not appropriate by sensing the vibration of the vibration actuator 7 by the arm.

  The detection unit 10 provided on the steering wheel W is disposed at an appropriate position and an inappropriate position of the steering wheel W. In the present embodiment, the two detection units 10 are provided at appropriate positions when the steering wheel W is gripped. For example, it is provided in an angle range of θ (0 ° to 30 °) from the horizontal center line L of the steering wheel W.

The other detection units 10 are provided at inappropriate positions. That is, three detection units 10 are provided at equal intervals according to the general size of the palm on the upper portion of the steering wheel W outside the angular range, and three detection units 10 are equally spaced at the lower portion. Is provided.

  For example, as shown by a solid line in FIG. 4, when the driver D grips an appropriate position of the steering wheel W, the detection unit 10 arranged at each appropriate position detects contact, and the control device 5 alerts the user. Do not execute. On the other hand, when the driver D is gripping the lower portion of the steering wheel W as indicated by a broken line in the figure, the detection units 10 arranged at the lower left and the lower right detect the contact. When the control device 5 receives a contact detection signal from the detection units 10 arranged at the lower left and lower right, the control device 5 drives the vibration actuator 7 of the detection unit 10 to vibrate the contact portion and prompt the change of the gripping position. .

  The detection unit 10 for the driver's seat S is provided at a position in the driver's seat S that is in contact with the driver D when the driver D sits in the driver's seat S in a correct posture, that is, an appropriate position. As shown in FIG. 2, the detection unit 10 is provided in each of the headrest S1, the seat back S2, and the seat cushion S3. One detection unit 10 is provided in the headrest S1. In the seat back S2, four detection units 10 are provided on the upper left, lower left, upper right, and lower right, respectively. In the seat cushion S3, four detection units 10 are provided on the left front, left rear, right front, and right rear, respectively.

  The control device 5 determines the contact position based on the contact detection signal input from each detection unit 10. Then, when the waist of the driver D and the seat back S2 are separated from each other, the lower two detection units 10 among the detection units 10 provided in the seat back S2 do not detect contact, so the control device 5 Vibrates the two vibration actuators 7 disposed at the left rear and right rear of the seat cushion S3 closest to the detection unit 10 to promote contact between the waist and the seat back S2.

  Further, when there is a detection unit 10 that does not detect contact among the detection units 10 provided in the seat cushion S3, the vibration actuator 7 close to the detection unit 10 is vibrated.

When the driver D is seated in a biased posture in which the center of gravity of the body is moved to a position other than the center of the body, the pressure information detected by each detection unit 10 has a different value. The control device 5 determines whether or not there is a difference of a predetermined amount or more in each pressure information output from each of the detection units 10 installed symmetrically, and if there is a difference of a predetermined amount or more, the seat It is determined that the load is not evenly applied to the back S2 or the seat cushion S3. Further, a region where the load is small is determined, and the vibration actuator 7 of the detection unit 10 disposed in the region is vibrated to prompt posture correction.
(Processing procedure)
Next, the processing procedure of this embodiment is demonstrated according to FIG. The control device 5 determines whether or not the vehicle C is traveling after startup (step S1). For example, the control device 5 inputs a shift position signal from the shift position sensor 8 or the neutral start switch, and determines that the vehicle is running when the shift position is other than the parking or neutral position. Or you may make it judge by other methods, such as judging whether it is drive | working based on the vehicle speed sensor (not shown) provided in each wheel.

If it is determined that the vehicle C is traveling (YES in step S1), the control device 5 determines the contact position of the driver D based on the presence or absence of a contact detection signal output from each of the detection units 10 (step S2). ). At this time, when the state where the contact portion of the pressure-sensitive sensor 6 is in contact continues for a predetermined time such as several seconds to 1 minute, it is determined that the driver's body is in contact with one of the vehicle bodies, and the contact position is determined. You may make it judge that it is not contacting, when the time which was doing is less than predetermined time.

  First, a case where the driving posture of the driver D is the above-described appropriate posture will be described. When the contact position is determined in step S2, the control device 5 determines whether or not the arm of the driver D is in contact with the front door F based on the contact position (step S3).

  When the detection unit 10 provided on the front door F does not detect contact, the control device 5 determines that the driver D does not put an arm on the door F (NO in step S3), and proceeds to step S5.

  In step S5, the control device 5 determines whether or not the gripping position of the steering wheel W is appropriate based on the contact position detected in step S2. That is, out of the detection units 10 provided on the steering wheel W, two detection units 10 arranged at appropriate positions detect contact, and whether or not the other detection units 10 are in a state of not detecting contact. to decide. If detection unit 10 arranged at an appropriate position detects contact and determines that the gripping position is an appropriate position (YES in step S5), the process proceeds to step S7.

  In step S7, the control device 5 determines whether or not contact is detected at each appropriate position of the driver's seat S. Specifically, the control device 5 determines whether or not all the detection units 10 provided in the driver's seat S have detected contact.

  When the driver attaches his head to the headrest S1, attaches his back to the seat back S2, and sits with his waist along the seat cushion S3, the control device 5 has an appropriate contact position of the driver seat S. (YES in step S7), the process proceeds to step S9.

  In step S9, the control device 5 determines whether or not a load is evenly applied to the seat cushion S3 based on the pressure information acquired from the detection unit 10 (step S9). The control device 5 acquires pressure information from the detection unit 10 provided in the seat back S2 or the seat cushion S3, and the difference between the pressure information detected by the detection units 10 installed symmetrically is greater than or equal to a predetermined amount. Judge whether there is. If the difference in the pressure information such as the contact resistance value is less than the predetermined amount, it is determined that the load is evenly applied to the seat back S2 or the seat cushion S3 (YES in step S9), and the alert is not executed. Returning to step S1, the above-described processing is repeated.

  Next, a case where the driver D takes an inappropriate driving posture will be described. The control device 5 determines the contact position based on the detection unit 10 (step S2), and determines whether or not the arm is in contact with the front door F (step S3). If it is determined that the arm is in contact with the front door F (NO in step S3), the vibration actuator 7 of the detection unit 10 arranged at the contact position is driven to vibrate the contact position (step S4). For example, as shown in FIG. 3, when the two detection units 10 of the front door F detect the contact of the arm of the driver D, the vibration actuators 7 of the two detection units 10 are vibrated. Since the detection unit 10 in contact with the arm is vibrated, the driver D can be made to understand that the arm is in an inappropriate position.

Further, the control device 5 determines whether or not the gripping position of the steering wheel W is an appropriate position (step S5). As indicated by a broken line in FIG. 4, when the gripping position of the steering wheel W of the driver D is other than the appropriate position (NO in step S5), one of the detection units 10 arranged at the inappropriate position detects contact. To do. The control device 5 determines the detection unit 10 that has detected the contact, and drives the vibration actuator 7 provided in the detection unit 10 (step S6). Accordingly, the vibration of the vibration actuator 7 disposed at the gripped position is transmitted to the palm of the driver D, and the driver D can sense that the gripping position is vibrating. Can be urged to understand and correct.

  Further, the control device 5 determines whether or not contact is detected at an appropriate position of the driver's seat S (step S7). When the waist of the driver D is away from the seat back S2, the lower detection unit 10 among the detection units 10 provided on the seat back S2 is in a state where it does not detect contact. Therefore, the control device 5 determines that there is a detection unit 10 that does not detect contact (NO in step S7), and vibrates around the contact position (step S8). For example, when the waist portion of the driver D is away from the seat back S2, the two vibration actuators 7 disposed at the left rear and right rear of the seat cushion S3 closest to each of the detection units 10 that do not detect contact are provided. Vibrate. For this reason, the driver D senses vibration from the seat cushion S3 side even though the thigh is in contact with the seat cushion S3. I can understand that.

  Further, the control device 5 determines whether or not the load is evenly applied to the seat cushion S3 (step S9), and determines that the load is not applied equally (NO in step S9), the load is small. The position is vibrated (step S10). For example, when the driver D biases the center of gravity to the left side of the driver D, the vibration actuator 7 on the right side as viewed from the driver D is driven. Or you may make it drive the vibration actuator 7 of the detection unit 10 with a larger load. That is, not all four vibration actuators 7 are driven, but the vibration actuators 7 in the region where the deviation is detected are driven, so that the driver D can immediately understand that the seating state is not appropriate.

When the vibration actuator 7 of the seat cushion S3 is vibrated, the process returns to step S1 and the above-described processing is repeated.
According to the above embodiment, the following effects can be obtained.

  (1) In the above embodiment, the control device 5 determines the contact position of the vehicle body of the driver D based on the detection unit 10. In addition, it is determined whether or not the driver D is in a recommended posture that is in contact with a position to be touched in an appropriate state, and if the driver D is not in the recommended posture, the driver D does not fall within the recommended posture. The vibration actuator 7 corresponding to the part is vibrated. For this reason, since the driver D can immediately understand that the part where the vibration is felt or the vicinity of the part does not correspond to the recommended posture, the driving posture can be corrected to a correct posture.

  (2) In the above embodiment, the control device 5 determines whether or not the driver D is in contact with an inappropriate position where the front door F and the steering wheel W should not contact. Further, when contact with an inappropriate position is detected, the vibration actuator 7 disposed at the inappropriate position is driven to vibrate the inappropriate position. The driver D can immediately understand that placing the arm or palm at that position is out of the recommended posture by sensing vibration in the arm or palm that is in contact with the inappropriate position.

(3) In the above embodiment, the control device 5 sets an appropriate position to be contacted to the driver's seat S during driving, and determines whether or not the driver D is in contact with the appropriate position based on the detection unit 10. . Further, when the contact to the appropriate position is not detected, the detection unit 10 closest to the appropriate position among the detection units 10 detecting the contact is determined, and the contact position is vibrated. For this reason, when the lower back is away from the seat back S2, the contact position around the seat cushion S3 is vibrated, so that the contact with the seat back S2 can be promoted and the correct driving posture can be corrected.

  (4) In the above embodiment, the control device 5 determines whether or not the driver D is in contact with the appropriate position based on the detection unit 10 and detects the contact with the appropriate position. Alternatively, the deviation of the pressure applied to the seat cushion S3 is detected, and it is determined whether or not a load is evenly applied to the seat back S2 or the seat cushion S3. Further, when it is determined that the pressure applied to the appropriate position is biased, the position with a small load is vibrated. Therefore, when vibration is detected on the right side or the left side of the seat back S2 or the seat cushion S3 even though the driver D is seated at an appropriate position, immediately if there is a tilt of the posture in the detected direction. Judgment can be made.

In addition, you may change the said embodiment as follows.
In the above embodiment, the pressure sensor 6 and the vibration actuator 7 are integrated, but they may be provided separately. Further, the vibration actuator 7 may be a movable vibration actuator 7. In this case, a moving mechanism such as a rail and a motor for moving the vibration actuator 7 may be provided on the front door F, the driver's seat S or the steering wheel W, and the vibration actuator 7 may be moved to a position to vibrate. In this way, the number of vibration actuators 7 can be reduced.

-The position of the detection unit 10 provided in the front door F, the steering wheel W, and the driver's seat S may be other than the above-described positions, and the number can be changed as appropriate.
In the above embodiment, among the detection units 10 provided on the front door F, the vibration actuator 7 of the detection unit 10 corresponding to the contact position is vibrated, but all may be vibrated.

  In the above embodiment, the vibration frequency of the vibration actuator 7 may be changed depending on the content of the alert. For example, when the driver D is in contact with an inappropriate position, the vibration actuator 7 is vibrated at a high frequency to prompt the user to stop contacting the inappropriate position, while the driver S does not move to the appropriate position. When the contact is detected and the vicinity of the appropriate position is vibrated, the contact with the appropriate position may be promoted at a low frequency. Alternatively, the vibration period or the like may be changed instead of changing the frequency.

In the above embodiment, the detection unit 10 is provided on the front door F, the steering wheel W, and the driver's seat S, but may be provided on other members.
When the control device 5 alerts the driver D, the control device 5 may output a display for prompting the posture correction to the display (not shown) of the navigation device. At this time, a position to be corrected such as a part to be corrected such as an arm or a hand, or a contact position of the front door F, the steering wheel W, the driver's seat S, or the like may be indicated by display. Or you may make it output the audio | voice which prompts | corrects attitude | position correction from the speaker of a navigation apparatus.

  The driving assistance system 1 may use a navigation device or various sensors mounted on the vehicle to issue a warning only when traveling straight ahead. For example, if it is determined from the map data that the vehicle is present at or near an intersection where the vehicle should turn or turn left or right, or if turning is detected by a steering sensor or gyro sensor, the vehicle will turn even if it is in the correct posture. For this reason, the steering wheel may touch an improper position. Therefore, in such a situation, the warning can be performed only in the optimum situation by not giving the warning.

Schematic of a driving assistance system. The perspective view which shows arrangement | positioning of a detection unit. The top view which shows the position of the detection unit provided in the front door. The front view which shows the suitable holding | grip position of a steering wheel. The flowchart which shows the process sequence of this embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Driving assistance system, 5 ... Driving assistance device, Contact judgment means, Posture judgment means, Warning means, Improper position contact judgment means, Suitable position contact judgment means, Pressure judgment means, Control device as control means, D ... Driving Driver as an expert.

Claims (6)

In the driving assistance device that corrects the posture of the driver,
Contact determination means for determining a contact position when the driver contacts the vehicle body;
Posture determination means for determining whether or not the driver is in a recommended posture that is in contact with a position to be touched during driving; and
When the driver is not in the recommended posture, a warning means for vibrating a contact position of a part not corresponding to the recommended posture or a contact position around the part of the driver's body is provided. Driving assistance device. The driving assistance device according to claim 1,
The posture determination means includes
An inappropriate position contact determining means for determining whether the driver is in contact with an inappropriate position that should not be touched during driving;
The warning means is
A driving assistance device that vibrates the inappropriate position when contact with the inappropriate position is detected. The driving assistance device according to claim 1 or 2,
The posture determination means includes
An appropriate position contact determining means for determining whether or not the driver is in contact with an appropriate position to be contacted during driving;
The warning means is
A driving assistance device that vibrates a contact position close to the appropriate position when the contact to the appropriate position is not detected. The driving assistance device according to claim 1,
The posture determination means includes
Appropriate position contact determination means for determining whether or not the driver is in contact with an appropriate position to be contacted during driving;
Pressure detecting means for detecting a bias of the pressure applied to the appropriate position when contact with the appropriate position is detected;
The warning means is
The driving assistance device characterized by vibrating the appropriate position when it is determined that the pressure applied to the appropriate position is biased. In the driving assistance method using the control means for correcting the posture of the driver,
The control means is
Determining the contact position of the driver, determining whether or not the driver is in a recommended posture in contact with the position to be contacted during driving; and
When the driver is not in the recommended posture, a driving assistance method of vibrating a contact position of a portion not corresponding to the recommended posture or a contact position around the portion of the driver's body. In the driving assistance program using the control means for correcting the posture of the driver,
The control means;
Contact determination means for determining a contact position of the driver;
Posture determination means for determining whether or not the driver is in a recommended posture that is in contact with a position to be touched during driving; and
A driving assistance program for causing a contact position of a part not corresponding to the recommended posture or a contact position around the part of the driver's body to vibrate when the driver is not in the recommended posture.

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