JP2015217813A - Operation input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress wrong operation to a touch sensor even during steering operation, and detect intended touch operation, in an operation input device.SOLUTION: An operation input device 10 comprises: a touch detection part (touch detection part R(20) and touch detection part L(30)) disposed on a steering 3 of a vehicle 1 and detecting touch operation; and a determination part for determining a touch operation state to the touch detection part, based on detection information which is a touch position (tracing position)θt detected by the touch detection part (touch detection part R(20) and touch detection part L(30)). The determination part determines whether the touch operation state is tracing operation or not, based on the steering angle θs, detection information, and a calculation value which is going to be calculated.

Description

  The present invention relates to an operation input device, and more particularly to an operation input device using capacitance detection that is used by being mounted on a vehicle's steering.

  2. Description of the Related Art Conventionally, there has been proposed a control device capable of operating an operation target device without releasing a hand from a steering handle of a vehicle or without greatly shifting the hand (for example, Patent Document 1).

  According to this control device, sensor data is generated based on a contact detection signal obtained from a touch sensor mounted so as to cover a gripping portion of the steering wheel, and the driver grips the detection portion based on the sensor data. An input operation to the touch sensor is detected as to whether or not the holding part is held. When the detection unit detects that the driver is holding the gripping unit and detects that a specific input operation has been performed on the touch sensor, the operation target device is determined according to the specific input operation. To control. In addition, when the vehicle is in a specific state such as a right turn, a left turn, cornering traveling, or reverse, it is supposed that safety is ensured by disabling control on the operation target device.

JP 2013-75652 A

  However, in the control device of Patent Document 1, since the tracing operation to the touch sensor when the vehicle is turned right or left is invalidated, when the vehicle is in a specific state such as right turn, left turn, cornering traveling, reverse, etc. There was a problem of not functioning as an operation input device.

  Accordingly, an object of the present invention is to provide an operation input device that suppresses erroneous operation of a touch sensor even during a steering operation and enables detection of an intended touch operation.

[1] In order to achieve the above object, a touch detection unit that is provided on the steering of the vehicle and detects a touch operation, a steering angle of the steering, and a touch position (tracing position) detected by the touch detection unit A determination unit that determines a touch operation state on the touch detection unit based on certain detection information, and the determination unit is based on the steering angle, the detection information, and a calculated value calculated therefrom. Thus, an operation input device is provided that determines whether or not the touch operation state is a tracing operation.

[2] The operation input device according to [1], wherein the calculated values are a steering angular velocity calculated from the steering angle and a touch velocity (tracing velocity) calculated from the touch position. May be.

[3] The touch detection unit includes first and second touch detection units provided at two left and right positions on the steering, and the first and second touch detection units perform a touch operation. If detected, the determination is performed using an average value of the touch speeds (tracing speeds) detected and calculated by the first and second touch detection units. The operation input device described in [2] may be used.

[4] The touch detection unit includes first and second touch detection units provided at two left and right positions on the steering, and the first and second touch detection units perform a touch operation. If detected, the operation input device according to the above [1] or [2], wherein the determination is performed independently by the first and second touch detection units, respectively. .

  According to the operation input device of the present invention, it is possible to suppress erroneous operation to the touch sensor even during the steering operation and to detect the intended touch operation.

FIG. 1 is a schematic diagram of an operation input device according to a first embodiment of the present invention. FIG. 2 is a configuration diagram illustrating a schematic configuration of the operation input device. FIG. 3 is a plan view showing the steering angle θs and the touch position (tracing position) θt when the steering is rotated. 4A to 4D are graphs showing the relationship between (a) steering angle θs, (b) steering angular velocity, (c) tracing speed, and (d) vehicle tracing speed and time, respectively. FIG. 5 is a flowchart showing an operation flow in the operation input device according to the first embodiment of the present invention. FIG. 6 is a flowchart showing an operation flow in the operation input device according to the second embodiment of the present invention.

(First embodiment of the present invention)
FIG. 1 is a schematic diagram of an operation input device according to a first embodiment of the present invention. FIG. 2 is a configuration diagram showing a schematic configuration of the operation input device.

  The operator (driver) performs the steering operation while holding the steering wheel 3 and touches the touch detection unit (touch detection unit R (20), touch detection unit L (30)) provided on the steering wheel 3 with a finger or the like. Therefore, it is difficult to distinguish between the tracing operation intended by the operator or the unintended tracing operation. Even in such an operation, the operation input device 1 according to the embodiment of the present invention has the steering angle θs of the steering wheel 3 and the touch detection unit (touch detection unit R (20), touch detection unit L (30)). Based on the touch position (tracing position) θt detected by the above, it is possible to determine whether or not the tracing operation is intended by the operator.

(Configuration of operation input device)
The operation input device 10 according to the first embodiment of the present invention is provided on the steering 3 of the vehicle 1 and detects a touch operation (touch detection unit R (20), touch detection unit L (30). )), And the detection information that is the steering angle θs of the steering wheel 3 and the touch position (tracing position) θt detected by the touch detection unit (touch detection unit R (20), touch detection unit L (30)). A determination unit that determines a touch operation state to the touch detection unit, and the determination unit traces the touch operation state based on the steering angle θs, the detection information, and the calculated value calculated from these. It is configured to determine whether or not the operation.

  Note that the touch detection unit has a configuration in which a touch detection unit R (20) and a touch detection unit L (30) are provided on the left and right sides of the steering wheel 3, respectively, but the first embodiment has a touch detection unit R ( 20) and the detection information of the touch detection unit L (30) are processed independently, and it is independently determined whether the touch operation state is a tracing operation. In addition, what is necessary is just to provide at least 1 touch detection part of touch detection part R (20) or touch detection part L (30).

(Configuration of touch detection unit)
The touch detection unit is provided as a touch detection unit R (20) and a touch detection unit L (30) on the left and right sides of the steering wheel 3, respectively. For example, it is a touch sensor that detects a touch position (tracing position) on the operation areas 200 and 300 touched by an operator's finger. For example, the operator can operate the connected electronic device by operating the operation areas 200 and 300. As the touch detection unit R (20) and the touch detection unit L (30), for example, a capacitive type touch sensor capable of detecting a plurality of detection fingers can be used.

  For example, the touch detection unit R (20) and the touch detection unit L (30) each change a capacitance value inversely proportional to the distance between the detection electrode and the finger when the finger approaches the operation areas 200 and 300, respectively. It is a touch sensor to detect. As shown in FIG. 2, a plurality of detection electrodes are provided below the operation areas 200 and 300.

  In FIG. 2, the touch detection unit R (20) and the touch detection unit L (30) illustrate a developed state before being attached to the surface of the steering 3. In the following, the touch detection unit R (20) mounted on the right side of the steering 3 will be described.

  The detection electrodes are arranged such that a plurality of first detection electrodes 201 and a plurality of second detection electrodes 202 formed in an elongated shape are insulated and intersect. The first detection electrodes 201 are arranged in an arc shape at equal intervals so as to intersect (orthogonal) the radial axis extending in the radial direction from the center of the steering 3 in FIG. The second detection electrodes 202 are arranged at equal intervals in the radial direction from the center of the steering wheel 3 so as to intersect (orthogonally) the first detection electrodes 201. Therefore, in a state where the steering wheel 3 is gripped by a finger, the finger can approach or come into contact with the operation region 200, that is, the first detection electrode 201 and the second detection electrode 202, and the operation region 200 is being operated during steering operation or steering. It is possible to perform a tracing operation while holding the.

  As shown in FIG. 2, the first detection electrode 201 detects a position Rx on the radial axis extending in the radial direction, and the second detection electrode 202 detects the rotation direction θt of the steering 3. The origin of the rotational direction θt is provided on the horizontal line Lz when the vehicle 1 shown in FIG. 1 is traveling straight (the steering 3 is not rotated).

  As shown in FIG. 2, the touch detection unit R (20) includes a drive unit R <b> 21 that drives the second detection electrode 202, and a reading unit 22 </ b> R that reads capacitance from the first detection electrode 201. Yes.

Driver R21 is a periodic current based on the drive signal S ₁ output from the touch detection control unit 41 of the control unit 40 to the second detecting electrode 202, and is configured to supply sequentially.

The reading unit R22 is configured to read the capacitance by sequentially switching the connection with the first detection electrode 201 while one second detection electrode 202 is being driven. Reading unit R22 has a threshold, read capacitance and by comparing the threshold value, and is configured to output the detection information S _R including information of the detection point coordinates. As an example, the calculation of the coordinates of the detection points is performed by a weighted average, whereby the touch position (tracing position) θt is acquired.

The touch detection unit L (30) has the same configuration as the touch detection unit R (20). Reading unit L32 is configured to output the detection information S _L that includes information of the coordinate detection points. As an example, the calculation of the coordinates of the detection points is performed by a weighted average, whereby the touch position (tracing position) is acquired.

  The touch detection unit R (20) and the touch detection unit L (30) mounted on the steering 3 are connected to the control unit 40 via the steering roll connector (SRC) 7 shown in FIG.

  In addition, an in-vehicle device 60 as a control target operated by the operation input device 10 is connected to the control unit 40 via a vehicle LAN 50. The in-vehicle device 60 corresponds to various in-vehicle devices such as an audio device, an air conditioning device, a lighting device, and a display device.

  The steering angle sensor 5 is connected to the control unit 40 via the vehicle LAN 50. The steering angle sensor 5 outputs the rotation angle information of the steering 3 to the control unit 40. A steering rotation angle θs shown in FIG. 3 described later is input to the control unit 40.

The control unit 40 is a microcomputer including, for example, a CPU (Central Processing Unit) that performs operations and processing on acquired data according to a program, a RAM as a semiconductor memory, a ROM (Read Only Memory), and the like.
For example, the RAM is used as a storage area for temporarily storing calculation results and the like.

The control unit 40 includes a touch detection control unit 41, a calculation unit 42, and a determination unit 43. The touch detection control unit 41 controls the input and output of the drive signals S ₁ and S ₂ of the touch detection unit R (20) and the touch detection unit L (30) and the detection information S _R and S _L. The calculation unit 42 calculates and calculates the tracing speed and the like from the detection information S _R and S _L. Moreover, the determination part 43 performs a trace determination according to the flowchart mentioned later.

  FIG. 3 is a plan view showing the steering angle θs and the touch position (tracing position) θt when the steering is rotated. FIG. 3 shows a state in which the steering wheel 3 is rotated from the horizontal line Lz to the left (counterclockwise) by the steering angle θs, and in this steered state, the finger 100 is dragged by θt. ing.

Touch position (tracing position) [theta] t is detected by the steering coordinates for the reference point P _R when the steering 3 is on the horizon Lz origin. On the other hand, the steering angle θs is detected in a vehicle coordinate system that is the amount of rotation by which the steering 3 is rotated with respect to the vehicle 1. Accordingly, when the touch position (tracing position) is calculated in the vehicle coordinate system, θ′t (vehicle coordinate system) = θt (steering coordinate system) + steering angle θs (vehicle coordinate system).

  In the present embodiment, the erroneous operation of the touch sensor during the rotation operation of the steering wheel 3 is a problem, so the component of the position Rx is not considered.

  4A to 4D are graphs showing the relationship between (a) steering angle θs, (b) steering angular velocity, (c) tracing speed, and (d) vehicle tracing speed and time, respectively. In each graph, the arrow direction shown in FIGS. 1 to 3 is positive, and the upward direction of the vertical axis is counterclockwise (counterclockwise).

  FIG. 4A shows the steering angle θs, which is a vehicle coordinate system. For example, the steering wheel 3 is operated to the right (clockwise) from time t01, the return operation is performed from time t02, and the steering angle θs = 0 is returned to time t05.

  FIG. 4B shows the steering angular velocity dθs / dt. This steering angular velocity is calculated (differentiated) and calculated in the calculation unit 42 of the control unit 40 based on the steering rotation angle θs input from the steering angle sensor 5. The steering angular velocity decreases in the minus direction from time t01, returns to zero at time t02 when the return operation of the steering wheel 3 is started, and becomes a graph having a reverse polarity after time t02. The steering angular velocity dθs / dt = 0 is returned at time t05 when the steering wheel 3 is returned.

  FIG. 4C shows the tracing speed dθt / dt. The steering angular velocity is calculated (differentiated) and calculated in the calculation unit 42 of the control unit 40 based on the touch position (tracing position) θt (steering coordinate system). For example, from time t11, the touch detection unit R (20) of the steering wheel 3 is dragged (touched) in the clockwise (clockwise) direction, and the counterclockwise counterclockwise (counterclockwise) is rotated from time t12 ( Touch operation) and the tracing speed dθt / dt = 0 is returned at time t13.

  FIG. 4 (d) shows the vehicle tracing speed (dθt / dt) + (dθs / dt). The vehicle tracing speed is obtained by differentiating the touch position (tracing position) θ′t (vehicle coordinate system) = θt (steering coordinate system) + steering angle θs (vehicle coordinate system) calculated in the vehicle coordinate system with respect to time t. is there. The vehicle-tracing speed is as shown in FIG. 4D from FIGS. 4B and 4C.

(Operation of the operation input device)
FIG. 5 is a flowchart showing an operation flow in the operation input device according to the first embodiment of the present invention. In the first embodiment, the tracing determination is performed based on the detection information S _R and S _L of the touch detection unit R (20) and the touch detection unit L (30). Based on _R , the operation of the touch detection unit R (20) will be described according to the steps of the flowchart.

When the operation flow of the operation input device 1 starts, first, the control unit 40 acquires the steering angle θs. Also, the touch position as the detection information _{S R} from the touch detection section R (20) (tracing position) [theta] t is obtained (step S01).

  In the calculation unit 42, the control unit 40 calculates the steering angular velocity dθs / dt from the steering angle θs. Further, the determination unit 43 determines whether or not the absolute value of the steering angular velocity dθs / dt is greater than a predetermined value th1. When it is larger than the predetermined value th1 (Yes), the process proceeds to step S03, and when not larger (No), the process proceeds to step S05 (step S02). That is, the tracing detection is not performed in the section W shown in FIG. The predetermined value th1 is, for example, 90 deg / s.

  In the determination unit 43, the control unit 40 determines whether the signs of the steering angular velocity dθs / dt and the steering angle θs are opposite. If the sign is reversed (Yes), the process proceeds to step S04. If the sign is not reversed (No), the process proceeds to step S05 (step S03).

  In the calculation unit 42, the control unit 40 calculates an anti-vehicle tracing speed (dθs / dt) + (dθt / dt). Further, the determination unit 43 determines whether or not the vehicle tracing speed is smaller than a predetermined value th2. If it is smaller than the predetermined value th2 (Yes), it is determined that an unintended tracing operation has been performed by the operator, and the operation flow is terminated without executing the tracing detection. When it is not smaller than the predetermined value th2 (No), the process proceeds to step S05 (step S04). The predetermined value th2 is 45 deg / s, for example.

  The above steps S02 to S04 are trace determinations performed by the determination unit 43. When it is determined by the tracing determination that the tracing operation is intended by the operator, the tracing detection is executed in step S05. That is, when the absolute value of the steering angular velocity dθs / dt is not larger than the predetermined value th1, the sign of the steering angular velocity dθs / dt and the steering angle θs is not reversed, or the vehicle tracing speed is not smaller than the predetermined value th2. The tracing detection is executed on the assumption that the tracing operation intended by the operator is performed. This stroking detection can be obtained as a stroking direction and a stroking amount from the data obtained by obtaining the touch position (stretching position) θt for every predetermined period, the touch start point, the end point, and the like.

Similarly, in the touch detection unit L (30), based on the steering angle θs and the detected information _{S L,} the same steps as above, the drag determination in step S02～S04, also is possible to trace detection of step S05 it can.

(Effects of the first embodiment)
The first embodiment of the present invention has the following effects.
(1) Based on the steering angle θs, the touch position (tracing position) θt, and the calculated value calculated from these, the touch operation state to the touch detection unit R (20) or the touch detection unit L (30) is a tracing operation. Judge whether or not. Therefore, it is possible to suppress an erroneous operation due to an unintended tracing operation during steering or return of steering, and to detect an intended touch operation.
(2) The tracing determination shown in steps S02 to S04 is an example, and the steering angle θs, touch position (tracing position) θt, steering angular velocity dθs / dt, tracing velocity dθt / dt, and combinations thereof, The stroking determination can be performed by various determination algorithms based on the running state, the operator's profile, and the like. For example, the stroking determination can be performed based on the stop of the vehicle, the traveling, the touch operation history of the operator, the touch habit, and the like.
(3) From the above, it is possible to provide an operation input device that can suppress an erroneous operation to the touch sensor even during a steering operation and can detect the intended touch operation.

(Second embodiment of the present invention)
The operation input device 1 according to the second embodiment includes the touch positions (tracing positions) θt _R of both the touch detection unit R (20) and the touch detection unit L (30) described in the first embodiment. based on [theta] t _L, and performs a tracing determination. Since the other configuration is the same as that of the first embodiment, the redundant description will be omitted below.

  FIG. 6 is a flowchart showing an operation flow in the operation input device according to the second embodiment of the present invention.

In FIG. 6, a step different from the first embodiment shown in FIG. 5 is step S14. In step S <b> 14, the control unit 40 calculates, in the calculation unit 42, an anti-vehicle tracing speed (dθs / dt) + ((dθt _R / dt) + (dθt _L / dt)) / 2. In other words, the stroke determination is performed based on the average value of the strokes of both the touch detection unit R (20) and the touch detection unit L (30).

(Effect of the second embodiment)
According to the second embodiment of the present invention, the stroke determination is performed using the average value of the strokes of both the touch detection unit R (20) and the touch detection unit L (30). Thereby, in addition to the effect of 1st Embodiment, a stroking determination can be performed on the conditions close | similar to the actual state which hold | gripped steering operation with both hands.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this embodiment, and various modifications and applications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Vehicle, 3 ... Steering, 5 ... Steering sensor 10 ... Operation input device 20 Touch detection part R, 21 ... Drive part R, 22 ... Reading part R
30 ... Touch detection unit L, 31 ... Drive unit L, 32 ... Reading unit L
DESCRIPTION OF SYMBOLS 40 ... Control part, 41 ... Touch detection control part, 42 ... Calculation part, 43 ... Determination part 50 ... Vehicle LAN
60 ... In-vehicle device 100 ... Finger 200 ... Operation region R, 201 ... Detection electrode X, 202 ... Detection electrode θ
300 ... Operation region L, 301 ... Detection electrode X, 302 ... Detection electrode θ
θs: Steering angle, θt: Touch position (tracing position)
P R _... steering the reference position R, P L _... steering the reference position L
Lz ... reference line

Claims (4)

A touch detection unit that is provided on the steering of the vehicle and detects a touch operation;
A determination unit that determines a touch operation state to the touch detection unit based on detection information that is a steering angle of the steering wheel and a touch position (race position) detected by the touch detection unit;
The operation input device, wherein the determination unit determines whether or not the touch operation state is a tracing operation based on the steering angle, the detection information, and a calculated value calculated therefrom.   The operation input device according to claim 1, wherein the calculated value is a steering angular velocity calculated from the steering angle and a touch velocity (tracing velocity) calculated from the touch position.   The touch detection unit includes first and second touch detection units provided at two left and right positions on the steering wheel, and when the first and second touch detection units detect a touch operation, The operation input according to claim 1, wherein the determination is performed using an average value of the touch speed (tracing speed) detected and calculated by the first and second touch detection units. apparatus. The touch detection unit includes first and second touch detection units provided at two left and right positions on the steering wheel, and when the first and second touch detection units detect a touch operation, The operation input device according to claim 1, wherein the determination is performed independently by the first and second touch detection units.

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