JP2013086750A - Input device for vehicle - Google Patents

Abstract

An apparatus that constitutes an input device is optimally arranged to prevent malfunction of the apparatus based on erroneous identification detection of a predetermined operation by a driver, and a space for performing a predetermined operation is provided that is substantially narrow. Therefore, it is possible to realize a vehicle input device that is easy to access and convenient for the driver, because the driver can occupy a large space even in a small driver's seat.
A steering system having a pair of left and right grips for steering a vehicle, a distance image camera for outputting a distance to an object in a detection target space as a two-dimensional image, and a distance image camera. Gesture detection means for discriminating and detecting a predetermined artificial operation input from the output, and distance image camera 22 is arranged so that at least a part of the detection target space coincides with a space sandwiched between grips when steering 10 is neutral did.
[Selection] Figure 1

Description

  The present invention relates to an input device for a vehicle, and more particularly to an input device for a vehicle for inputting various operations such as an operation of a vehicle function and an operation of a mounted device by a driver.

The vehicle input device is a device that inputs various operations such as operation of vehicle functions and on-board equipment by the driver, and most of them are concentrated around the instrument panel and the driver's seat. (Handles, wheels) and the column are concentrated. Such an input device is generally a switch or a lever. In recent years, auxiliary input devices using display devices for electrical devices such as navigation devices and AV devices, and optical devices such as cameras have been proposed.
In general, an input device for inputting various operations of an apparatus is basically required to have accuracy of operation detection. In addition, from the viewpoint of universal design, it is necessary for anyone of a wide range of users to easily recognize and operate.
In particular, as an input device mounted on a vehicle, it is necessary to provide a mechanical structure and shape for performing a driving operation when the vehicle travels. It is required to be easy to operate even during driving, to have a design property (giving aesthetics) as a product.
Furthermore, in order not to impair drivability, and to assist drivability, the visual display device that gives information to the driver is arranged as far as possible from the driver, thereby reducing the amount of eye movement. It has been found that it is desirable to dispose operation switches (input devices) operated by the driver close to the driver.

Some input devices for inputting various operations of a general device take a gesture, which is a predetermined operation by an operator, with a camera, and control the device according to the photographed gesture. (Japanese Patent Laid-Open No. 2010-205223)
In addition, in the vehicle input device, a camera whose shooting area is an area including the steering wheel from the front of the driver to the instrument panel is arranged on the ceiling of the passenger compartment, and the hand grip position detected from the imaging of the camera Some devices set operation inputs to devices based on the state of the hand such as the direction in which the user slips. (Japanese Patent Laid-Open No. 2005-250785)
In the input device using the camera, the camera is attached to the steering wheel, and the image taken by the camera is rotated by the steering operation angle to correct the tilt, and the characteristic part of the driver's face is extracted to determine whether the driver is snoozing or looking away There is something. (Japanese Patent Laid-Open No. 2010-13090)
In the input device using a camera, the camera is placed on a room mirror or the like so as to capture the space including the movable range of the steering wheel, the position of the steering wheel on the camera image is specified, and There are some which determine the position of the hand and determine whether the steering wheel is gripped by comparing the position of the steering wheel and the position of the hand. (Japanese Patent Laid-Open No. 2011-12155)
Some input devices using a camera estimate a driver's arousal level from a face image acquired by a face recognition camera and issue a warning according to the arousal level. (Japanese Unexamined Patent Application Publication No. 2009-248559)
Some input devices using a camera are provided with a camera that images the driver from the front on the top surface of the steering column, and determine the driver state from a face image acquired by the camera. (Japanese Unexamined Patent Application Publication No. 2009-248777)

JP 2010-205223 A JP 2005-250785 A JP 2010-13090 A JP2011-12155A JP 2009-248559 A JP 2009-248777 A

  However, the input device using the camera disclosed in the above publication is not a usage method fused with a display system as an input device for inputting various operations of the device. The arrangement is significantly limited by the shape, and there is room for improvement in the main input device.

  According to the present invention, the devices constituting the input device are optimally arranged to prevent malfunction of the device based on erroneous identification detection of the predetermined operation by the driver, and the space for performing the predetermined operation is substantially narrow. An object of the present invention is to realize a vehicle input device that can be provided, has excellent mountability, can occupy a driver's occupied space even in a small driver's seat, and is easily accessible and convenient for the driver.

  This invention steers a vehicle and has a pair of left and right grips, a distance image camera that outputs a distance to an object in a detection target space as a two-dimensional image, and an output from the distance image camera. Gesture detecting means for identifying and detecting a specific predetermined operation input, and disposing the distance image camera so that at least a part of the detection target space coincides with a space sandwiched between grips when the steering is neutral It is characterized by that.

According to the present invention, the distance image camera is arranged so that a part of the detection target space of the distance image camera coincides with the space between the grips when the steering is neutral. The operation (gesture operation) can be recognized only when the vehicle is traveling straight ahead, and it makes it difficult for the driver to perform a predetermined operation during turning by turning the steering wheel. It is possible to prevent malfunction of the equipment based on it.
The present invention provides a space (detection target space) for performing a predetermined operation substantially narrowly by the arrangement of the distance image camera with respect to the steering grip, and can reduce the mounting space of the input device. Therefore, even with a small seat, the driver can occupy a large space, which is easy for the driver to access and is convenient.

FIG. 1 is a perspective view of a vehicle provided with an input device. (Example) FIG. 2 is a perspective view of the input device. (Example) FIG. 3 is a front view of the input device. (Example) FIG. 4 is a front view of the input device during steering operation. (Example) FIG. 5 is a system configuration diagram of an input device connected to the control device. (Example)

  Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the present invention. In FIG. 1, 1 is a vehicle, 2 is a floor panel, 3 is a front shield, 4 is a roof panel, 5 is a passenger compartment, and 6 is a wheel. In the vehicle 1, a seat 7 is installed on a floor panel 2 in a passenger compartment 5, and an instrument panel 8 is provided below the window shield 3 in front of the seat 7. A steering wheel 10 is attached to the instrument panel 8 to steer the wheel 6 by the steering column 9 at a position facing the driver D seated on the seat 7.
As shown in FIG. 2, the steering 10 includes a disc-shaped steering pad 11 that is rotatably supported by the steering column 9, and a pair of left and right stay portions 12 and 13 that protrude outwardly from the lower portion of the steering pad 11. And a pair of left and right grips 14 and 15 extending upward from the stay portions 12 and 13 along the outer periphery of the steering pad 11.
In the vehicle 1, an input device 16 is disposed on the instrument panel 8, the steering column 9, and the steering 10 at a position facing the driver D. The input device 16 includes a pair of left and right combination lever switches 17, 18 provided on the steering column 9 in front of the grips 14, 15 of the steering 10 and a pair of left and right provided at opposite ends of the grips 14, 15 on the steering 10. Push switches 19 and 20, a touch pad 21 provided on the steering pad 11, and a detection target space 23 by a distance image camera 22 disposed on the instrument panel 8 ahead of the steering 10.
The substantial arrangement of these operation input means allows the hand to reach along a substantially flat surface extending vertically and horizontally, which is drawn by the hand when the arms of the driver D, which are almost fully extended, are moved around the shoulders. The operation input area S is a range. The lower half of the operation input area S that can be reached by the driver D is a touch operation area S1 that the driver D directly touches and operates. In the touch operation area S1, combination lever switches 17 and 18, push switches 19 and 20, and a touch pad 21 are arranged. Further, the upper half of the operation input area S that can be reached by the driver D is a gesture operation area S2 in which the driver D performs an operation in the space without touching it directly. In the gesture operation area S2, a detection target space 23 by the distance image camera 22 is arranged.

The distance image camera 22 is a camera that has a viewing angle V so as to form a three-dimensional detection target space 23 that diffuses in a projective manner, and outputs a two-dimensional image of the distance to the target in the detection target space 23. is there. Since the distance image camera 22 uses the principle of triangulation by the detection unit 24, there are a plurality of sensors for detecting the distance. Since the distance between these sensors also affects the distance detection accuracy, it is necessary to secure an installation width for the arrangement of the distance image camera 22.
In this embodiment, as shown in FIG. 2, detection that extends in the horizontal direction toward the width direction on a surface that curves from the upper surface of the instrument panel 8 provided in front of the vehicle body to the rear surface of the driver D side from the steering wheel 10. A window 25 is formed. The distance image camera 22 is housed inside the instrument panel 8 so that the detection unit 24 faces the detection window 25, and is supported by an attachment portion of a vehicle body structure (steering support member) (not shown).
The distance image camera 22 is arranged such that the central axis C of the viewing angle V by the detection unit 24 passes through the detection window 25 and is directed to the roof panel 4 of the vehicle 1 in the rear upper part. In the range of the viewing angle V, the body of the driver D does not directly enter the detection target space 23, and the non-detection space 26 is formed between the detection target space 23 of the viewing angle V and the body of the driver D. As a posture to be formed, the distance image camera 22 is supported in the instrument panel 8. The attachment angle of the distance image camera 22 may be changed and set according to the driving posture of each vehicle 1 and the arrangement and shape of the steering attachment angle.
When viewed from the driver D seated on the seat 7, the distance image camera 22 is within a range surrounded by the outermost locus by the grips 14 and 15 when the steering 10 is turned as shown in FIGS. Arranged to fit. With this arrangement, the distance image camera 22 can make it difficult for the driver D to be aware of its presence, and the installation width required for the detection unit 24 of the distance image camera 22 to ensure the detection function can be ensured. A caution lamp and an indicator can be provided at the installation position of the distance image camera 22.

The steering 10 includes a space 27 between the upper ends of a pair of left and right grips 14 and 15 held by the driver D with both hands. The steering 10 is provided with angle detection means 28 for detecting the angle when the turning operation is performed (see FIG. 5). Note that the steering 10 may be either a mechanical type connected by a rotating shaft or a steer-by-wire type. The space 27 sandwiched between the grips 14 and 15 is positioned so as to face upward of the vehicle when the steering 10 is neutral. A distance image camera 22 is disposed in a space 27 sandwiched between the grips 14 and 15 when the steering 10 is neutral so that at least a part of the detection target space 23 having the viewing angle V of the distance image camera 22 coincides. ing.
In the space where the detection target space 23 and the space 27 sandwiched between the grips 14 and 15 overlap, the touch operation area S1 and the gesture operation area S2 share the space, and the entire area including the gesture operation area S2 can be made compact. At the same time, the user-friendly input device 16 can be provided due to good access from the driver D. Moreover, the input device 16 does not need to make the detection target space 23 unnecessarily large by securing the detection target space 23 that secures an area in which the palm is spread between the upper ends of the grips 14 and 15. Sufficient space can be secured to perform a gesture by D's hand.
Thus, the input device 16 has arranged the distance image camera 22 so that a part of the detection target space 23 of the distance image camera 22 coincides with the space 27 sandwiched between the grips 14 and 15 when the steering 10 is neutral. Therefore, a predetermined operation (gesture operation) by the driver D in the detection target space 23 is recognized only when the vehicle 1 travels straight, and the detection target space 23 is detected by the grips 14 and 15 as shown in FIG. By covering the, the driver D is difficult to perform a predetermined operation during the turning traveling by the turning operation of the steering 10, and it is possible to prevent malfunction of the device based on erroneous identification detection of the predetermined operation input.
In addition, the input device 16 is provided with a detection target space 23 that is substantially narrow and has a predetermined operation depending on the arrangement of the distance image camera 22 with respect to the grips 14 and 15 of the steering 10, and the mounting space of the input device 16 is reduced. In addition, since the mountability is excellent, even a small seat 7 can occupy a wide space occupied by the driver D, and the driver D can easily access it, which is convenient.

As shown in FIG. 5, the input device 16 includes a distance image camera 22 that outputs a two-dimensional image of a distance to an object in the detection target space 23 (in this embodiment, the hand of the driver D) and outputs it. The angle detection means 28 for detecting the angle when the steering wheel 10 is turned, and the gesture detection means 29 for identifying and detecting a predetermined artificial operation input from the output of the distance image camera 22 are provided. .
The predetermined operation input detected by the gesture detection unit 29 is output to various control devices 31 to 34 by the in-vehicle LAN (CAN) 30 or the like to control the device. For example, the control device 31 controls a screen 35 of a display device described later according to a predetermined operation input. The control device 32 controls the air conditioner according to a predetermined operation input. The control device 33 controls the acoustic device according to a predetermined operation input. The control device 34 controls another control device in accordance with a predetermined operation input.
In the steering state in which the turning angle is given to the steering wheel 10 such as during turning, the gesture detecting unit 29 of the input device 16 has a turning angle of the steering wheel 10 detected by the angle detecting unit 28 (for example, neutral). If the rotation center that is in the vicinity exceeds the neutral angle in a range including a slight dead zone in both the left and right directions), it is determined that the vehicle is traveling non-straight, turning, etc., and the detection target space 23 by the distance image camera 22 Temporarily cancel the judgment.
As shown in FIG. 4, when the steering wheel 10 is turned, the detection windows 25 in the lower space of the gesture operation area S2 are blocked by the grips 14 and 15 and the hand of the driver D who holds the grips 14 and 15. Although the operation area S2 is cut and cannot be determined, the gesture detection unit 29 can eliminate the erroneous operation based on the erroneous determination by stopping the determination.
As a result, even if the input device 16 has an ambiguous input state of gesture operation, the gesture device can be operated only when going straight ahead where it is easy to recognize surrounding safety. A driver's seat environment that prevents operation and malfunctions can be realized.

As shown in FIG. 1, the input device 16 is provided with a display device at the upper part of the instrument panel 8 serving as a concentrated display area, ahead of the line of sight L when the driver D sees the front of the vehicle through the gesture operation area S2. ing. Here, the line of sight L of the driver D seated on the seat 7 facing the steering wheel 10 is in front of the detection target space 23 given by the viewing angle V of the distance image camera 22 and the instrument panel 8. A head-up display (HUD) screen 35 as a display device is provided between the top and the windshield 3. As shown in FIG. 2, an image is projected onto the screen 35 from a projector 36 installed on the instrument panel 8.
The input device 16 installs the distance image camera 22 so that the viewing angle V of the distance image camera 22 intersects the line of sight L at the vertically upper position of the pair of left and right grips 14 and 15 of the steering 10. In FIG. 1, reference symbol P <b> 1 is an equidistant surface (plane) of the detection target space 23 given by the viewing angle V of the distance image camera 22, and reference symbol P <b> 2 is an operation assumed by the driver D across the equidistant surface P <b> 1. It is a surface (virtual plane).
As shown in FIG. 1, the screen 35 overlaps the gesture operation area S2 on the line of sight L of the driver D. The gesture operation area S <b> 2 can secure a palm-like space from a position between the pair of left and right grips 14 and 15 of the steering 10 to the screen 35. Note that the screen 35 can be a screen by providing a dedicated screen on the instrument panel 8 or attaching a polarizing film to the windshield 3.
Since this input device 16 is provided with a screen 35 of the display device in front of passing the detection target space 23 of the distance image camera 22 on the extension of the line of sight L of the driver D, the movement of the line of sight of the driver D is reduced. At the same time, the driver D can perform a predetermined operation while viewing the display on the screen 35, and convenience can be improved.
Further, the input device 16 is provided with a detection target space 23 in front of the driver D and at a position away from the chest, and a non-detection target space is a close-distance space where daily operations such as in front of the driver D and the chest are performed. Therefore, it is possible to prevent malfunction of the device based on erroneous identification detection of a predetermined operation input.

As an example of the image content displayed on the screen 35, a hand gesture shape corresponding to the option is simply displayed. Since the driver D only needs to perform the actual hand gesture while viewing the display content on the screen 35, the driver D does not have to remember the gesture, and this arrangement allows the driver D to move the line of sight L very little. This reduces the possibility of losing attention to the surroundings of the vehicle because the focal length adjustment range is small.
As an example 2 of the image content displayed on the screen 35, if an option button (option area) is set to be displayed in a vertical direction (vertical direction) and the length is set so as to be linked with a position where a gesture is performed, Since it is possible to adjust by yourself to sit on the seat 7 with the back straight so that the driver D faces directly, even if the viewpoint height position of the driver D changes depending on the physique, the selection operation should be determined accurately Can do. That is, the input device 16 can ensure the accuracy of operation input detection.
The gesture operation region S2 is continuous upward from the upper end of the steering pad 11, and can provide a wide range up to a range covering the line of sight L when the driver D looks at the front of the vehicle. It is possible to adapt to a wide range of users with different seat heights of the driver D and different viewpoints. Especially for a small driver D, a gesture operation region S2 that is continuous up and down is effective. Further, it is not necessary to install the vehicle while avoiding the steering portion, and there is little need to process the steering portion of the distance image output from the distance image camera 22.
The vehicle 1 is provided with not only a screen 35 provided between the instrument panel 8 and the windshield 3 but also a left side view monitor 37 on the left side of the instrument panel 8 as a display device. A right side view monitor 38 is provided on the right side of the panel 8.

As shown in FIG. 3, the input device 16 is provided with a steering pad 11 in the center of a space 39 surrounded by a pair of left and right grips 14 and 15 of the steering 10. On the upper part of the steering pad 11, the touch pad 21 is arranged with the upper end facing a space 27 sandwiched between the grips 14 and 15. The touch pad 21 is detachably attached to the slot 40 above the steering pad 11. The touch pad 21 can be a later generation portable terminal or the like having a touch panel 41 in which a touch panel layer is superimposed on a display screen. Also on the touch pad 21, the driver D not only selects the display on the touch panel 41 using one finger, but also scrolls up and down, left and right, and zooms in and out using a plurality of fingers. It is possible to input gesture operation by hand.
In this way, the input device 16 has a touch pad 21 that is substantially narrower than the width of the steering pad 11 at the top, and the space between which the upper end of the touch pad 21 is sandwiched between the grips 14 and 15 that coincide with the detection target space 23. 27, a space for the driver D to perform a predetermined operation (detection target space 23) is provided so as to continue upward from the touch pad 21, and a touch operation to the touch pad 21 and a predetermined operation (gesture operation) are provided. ) Can be provided with a compact operation input means combined with a non-contact operation, and since it is excellent in mountability, the driver D can easily control the occupied space of the driver D even with a small seat 7 and can be easily accessed by the driver D. Because there is, it is convenient.
Further, the input device 16 has the operation input means of the combination lever switches 17 and 18, push switches 19 and 20, the touch pad 21, and the detection target space 23 above the rotation center of the steering 10 at the outermost end. The touch pad 21, the push switches 19, 20 and the detection target space 23 are concentratedly arranged in a triangular shape facing upwards with the line segment connecting the combination lever switches 17, 18 as the bottom. Thereby, the input device 6 is operated so that the detection target space 23 of the non-contact operation by the predetermined operation (gesture operation) is vertically connected to the combination lever switches 17 and 18 and the push switches 19 and 20 of the contact operation. An input region S can be formed.
Further, the input device 16 is provided with a display device of information for the driver D with the periphery of the center of rotation of the steering 10 as a central display area. As a display device of information for the driver D, a head-up display (HUD) screen 35 at the top of the instrument panel 8 and a pair of side view monitors 37 and 38 are provided on the left and right sides thereof. The touchpad 21 described above is also a portable terminal, and the touch panel 41 functions as a sub-monitor by cooperating with an in-vehicle control device including the control devices 31 to 34 through communication.

  The present invention prevents the malfunction of the device based on the erroneous identification detection of the predetermined operation by arranging the devices constituting the input device in an optimal manner, and also makes a space for performing the predetermined operation substantially narrow. It is possible to provide a vehicle input device that is easy to access and convenient, and can be applied not only to four-wheeled vehicles but also to two-wheeled vehicles.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Floor panel 3 Front shield 7 Seat 8 Instrument panel 9 Steering column 10 Steering 11 Steering pad 14/15 Grip 16 Input device 17/18 Combination lever switch 19/20 Push switch 21 Touch pad 22 Distance image camera 23 Detection object Space 25 Detection window 26 Non-detection space 27 Space between grips 14 and 15 28 Angle detection means 29 Gesture detection means 30 In-vehicle LAN (CAN)
31-34 Control device 35 Screen 36 Projector 37 Right side view monitor 38 Left side view monitor 41 Touch panel D Driver S Operation input area S1 Touch operation area S2 Gesture operation area

Claims (3)

  Steering with a pair of left and right grips that steer the vehicle, a distance image camera that outputs the distance to the object in the detection target space as a two-dimensional image, and a predetermined artificially determined from the output of the distance image camera Gesture detecting means for identifying and detecting an operation input; and the distance image camera is arranged so that at least a part of the detection target space coincides with a space sandwiched between grips when the steering is neutral. Vehicle input device.   A display device is provided between an instrument panel in front of the driver's line of sight sitting in front of the steering and passing through a detection target space given by a viewing angle of the distance image camera to a windshield, and the distance image 2. The vehicle input device according to claim 1, wherein the distance image camera is arranged so that a viewing angle of the camera intersects the driver's line of sight at a position vertically above a space between the steering grips. .   A steering pad is provided in the center of a space surrounded by a pair of left and right grips of the steering, and a touch pad is disposed above the steering pad with an upper end facing a space sandwiched between the grips. The vehicle input device according to claim 1 or 2.

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