JP5711312B2 - Driving simulation apparatus and driving simulation program using portable terminal - Google Patents

Description

  The present invention relates to a driving simulation apparatus and a driving simulation program that control driving of a virtual vehicle using a computer.

  Conventionally, driving games and driving simulations in which a player operates a car by simulating driving are being developed. In such a driving game or driving simulation, for example, a keyboard of a personal computer may be used as an input device for a player (see Patent Document 1).

Japanese Patent No. 5149426

  In recent years, mobile terminals that are portable terminal devices such as smartphones and tablet terminals have become widespread. Some driving games and the like provided for such mobile terminals simulate a steering operation of a virtual vehicle based on, for example, the inclination of the mobile terminal detected using an acceleration sensor built in the mobile terminal.

  However, in such a driving game or the like, in the steering operation of the virtual vehicle, for example, when the player tilts the mobile terminal, the steering of the virtual vehicle may be steered more than the player expects. For this reason, it is difficult for the player to fine-tune the steering of the virtual vehicle, and there is a problem that the reality of driving operation is lacking in order to simulate the driving of the virtual vehicle with a mobile terminal, and improvement has been demanded in this respect.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a driving simulation apparatus capable of simulating a virtual vehicle with a more realistic driving operation on a mobile terminal. It is in.

  In order to achieve the above object, the driving simulation apparatus according to the first aspect of the present invention includes a display unit, an inertial sensor, and a control unit, and the control unit stores a steering angle of the virtual vehicle. Means, a means for calculating an operation angle from an output signal of the inertial sensor, a ratio of the steering angle of the virtual vehicle to a maximum steering angle of the steering of the virtual vehicle, and a ratio of the operation angle to a maximum operable angle Means for calculating the steering amount of the virtual vehicle from a conversion curve in which the relationship of the steering amount of the virtual vehicle to the difference between the ratio of the steering angle of the virtual vehicle and the ratio of the operation angle is determined based on the difference between And a means for updating the stored steering angle of the virtual vehicle based on the calculated steering amount, and the updated steering angle of the virtual vehicle And create a video that reflects and a video display means for displaying on the display unit.

  According to the driving simulation apparatus of the first aspect of the present invention, by calculating the difference between the ratio of the steering rudder angle to the maximum steering angle of the virtual vehicle steering and the ratio of the operation angle to the maximum operable angle, It is possible to identify whether or not there is a difference between the correct steering angle and the relative operation angle. When this difference occurs, the steering amount of the virtual vehicle is obtained from a conversion curve that predefines the relationship of the correction amount of the steering angle of the virtual vehicle with respect to the difference between the ratio of the steering angle of the virtual vehicle and the ratio of the operation angle. By correcting the steering angle with this steering amount, it is possible to simulate steering that approximates an actual vehicle. Therefore, a more realistic driving simulation can be realized.

  The driving simulation apparatus according to the second aspect of the present invention is characterized in that, in the first aspect described above, the conversion curve is a logistic curve.

  According to the driving simulation apparatus of the second aspect of the present invention, since the conversion curve is a logistic curve, play of the steering of the virtual vehicle can be realized. The logistic curve is a curve having a small amount of change at the beginning, a large amount of change in the middle, and a small amount of change after that, and is expressed symmetrically around the inflection point. When the relationship between the steering angle ratio of the virtual vehicle and the steering angle ratio of the virtual vehicle is expressed by a logistic curve, the change in the steering amount is smaller as the difference is smaller, and the steering is performed as the difference increases. Since the change in the amount becomes large and then the change in the steering amount becomes small again, it is very close to the steering behavior in an actual vehicle. Thereby, a more realistic driving simulation can be realized.

  In the driving simulation apparatus according to the third aspect of the present invention, in the first aspect or the second aspect described above, the means for calculating the steering amount of the virtual vehicle corrects the steering response of the virtual vehicle. A means for further correcting the calculated steering amount based on the coefficient is included.

  According to the driving simulation apparatus of the third aspect of the present invention, it is possible to simulate steering steering of a virtual vehicle with steering responsiveness according to a player's preference.

  In the driving simulation apparatus according to the fourth aspect of the present invention, in any one of the first to third aspects described above, the means for updating the steering angle is the ratio of the operation angle and the steering of the virtual vehicle. When the difference between the steering angle ratio and the calculated steering amount is smaller than the calculated steering amount, based on the difference between the operation angle ratio and the steering angle ratio of the virtual vehicle, instead of the calculated steering amount, The steering angle is updated.

  According to the driving simulation device of the fourth aspect of the present invention, the calculated steering rudder angle correction amount is prevented from becoming larger than the steering rudder angle change amount corresponding to the operation angle operated by the player. be able to.

  A driving simulation apparatus according to a fifth aspect of the present invention includes a server device, an inertial sensor, and a mobile terminal device that communicates with the server device via a network, and the mobile terminal device includes: Means for calculating an operation angle of the mobile terminal device from an output signal of the inertial sensor, and means for displaying a moving image transmitted from the server device on the display unit. Means for storing a steering rudder angle; a ratio of a steering rudder angle of the virtual vehicle to a maximum steering angle of the steering of the virtual vehicle; and the portable with respect to a maximum operable angle of the portable terminal device transmitted from the portable terminal device. Based on the difference with the ratio of the operation angle transmitted from the terminal device, the ratio of the steering angle of the virtual vehicle and the ratio of the operation angle The means for calculating the steering amount of the virtual vehicle from a conversion curve that predefines the relationship of the steering amount of the virtual vehicle to the vehicle, and the stored steering angle of the virtual vehicle is updated based on the calculated steering amount And means for creating a moving image reflecting the updated steering angle of the virtual vehicle and transmitting the moving image to the portable terminal device.

  According to the driving simulation apparatus of the fifth aspect of the present invention, a more realistic driving simulation can be realized as in the first aspect described above.

  A driving simulation program according to a sixth aspect of the present invention is a driving simulation program to be executed by a computer of a portable terminal device having a display unit and an inertial sensor, the means storing a steering angle of a virtual vehicle, and the inertial sensor Means for calculating an operation angle from the output signal, a ratio of the steering angle of the virtual vehicle to the maximum steering angle of the steering of the virtual vehicle, and the operation angle transmitted from the portable terminal device with respect to the maximum operable angle. Based on the difference with the ratio, the steering amount of the virtual vehicle is calculated from a conversion curve that predefines the relationship of the steering amount of the virtual vehicle with respect to the difference between the steering angle ratio and the operation angle ratio of the virtual vehicle. On the basis of the calculated steering amount and the steering angle storage means. It said means for updating the steering angle of the virtual vehicle, and create a video that reflects the steering angle of the updated the virtual vehicle, characterized in that it comprises, means for displaying on the display unit.

  According to the driving simulation program of the sixth aspect of the present invention, a more realistic driving simulation can be realized in the same manner as the driving simulation apparatus of the first aspect described above.

  A driving simulation program according to a seventh aspect of the present invention is a driving simulation program to be executed by a computer of the server device in a network system including a server device and a mobile terminal device that communicates with the server device via a network. , Means for storing the steering angle of the virtual vehicle, the ratio of the steering angle of the virtual vehicle to the maximum steering angle of the virtual vehicle, and the maximum operation of the portable terminal device transmitted from the portable terminal device Steering of the virtual vehicle relative to the difference between the ratio of the steering angle of the virtual vehicle and the ratio of the operation angle based on the difference between the ratio of the operation angle of the mobile terminal device transmitted from the mobile terminal device to the angle The steering amount of the virtual vehicle from a conversion curve that prescribes the relationship between the amounts Based on the calculated steering amount, the means for updating the steering angle of the virtual vehicle stored in the steering angle storage means, and the updated steering angle of the virtual vehicle are reflected based on the calculated steering amount. And a means for creating the transmitted moving image and transmitting it to the mobile terminal device.

  According to the driving simulation program of the seventh aspect of the present invention, a more realistic driving simulation can be realized in the same manner as the driving simulation apparatus of the first aspect described above.

  According to the driving simulation device of the present invention, a more realistic driving simulation can be realized.

It is a block diagram showing a schematic structure of a driving simulation device concerning a 1st embodiment of the present invention. (A) shows the X-axis and Y-axis of the acceleration sensor built in the mobile terminal, and (B) shows the Z-axis of the acceleration sensor built in the mobile terminal. It is a figure which shows an example of the moving image displayed on a driving simulation apparatus. 3 is a flowchart of an operation simulation routine according to the first embodiment. FIG. 5 is a flowchart of a steering angle calculation step for a virtual vehicle performed in the driving simulation routine of FIG. 4. FIG. It is a figure which shows an example of a logistic curve. It is the schematic of the driving | running simulation apparatus which concerns on 2nd Embodiment of this invention. It is a block diagram which shows schematic structure of the driving | running simulation apparatus which concerns on 2nd Embodiment. It is a flowchart of the driving | running simulation routine which concerns on 2nd Embodiment. FIG. 10 is a flowchart of a virtual vehicle steering angle calculation step performed in the driving simulation routine of FIG. 9. FIG.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a driving simulation apparatus 1 according to the first embodiment of the present invention, and FIG. 2A is a diagram showing an X axis and a Y axis of an acceleration sensor built in the mobile terminal. FIG. 2B is a diagram illustrating the Z axis of the acceleration sensor built in the mobile terminal, and FIG. 3 is a diagram illustrating an example of a moving image displayed on the driving simulation apparatus 1.

  The driving simulation apparatus 1 includes an acceleration sensor (inertia sensor) 10, a display unit 11, a calculation unit (control unit) 12, and a storage unit 13. The driving simulation device 1 is a mobile terminal device such as a smartphone or a tablet terminal, and is a portable terminal device that can install and execute a program to be described later.

  The acceleration sensor 10 detects accelerations in the three-axis directions of the X axis, the Y axis, and the Z axis that are orthogonal to each other in the driving simulation apparatus 1. When the acceleration sensor 10 detects the X-axis, Y-axis, and Z-axis accelerations, the acceleration and deceleration of each axis can be recognized. In particular, it is possible to define the relationship between the mobile terminal and the earth by detecting the acceleration of gravity acting on the earth center by the acceleration sensor 10. Accordingly, the acceleration sensor 10 can detect the inclination of the driving simulation apparatus 1, that is, the inclination angle of the mobile terminal, by detecting the respective accelerations of the X axis, the Y axis, and the Z axis.

  Here, the X axis detected by the acceleration sensor 10 is an axis extending in the horizontal direction at substantially the center in the longitudinal direction of the driving simulation apparatus 1. The Y-axis detected by the acceleration sensor 10 is an axis that is orthogonal to the X-axis and extends substantially in the center in the width direction of the driving simulation apparatus 1 in the vertical direction. The Z axis detected by the acceleration sensor 10 is an axis that is orthogonal to the X axis and the Y axis and extends from the back surface 14 of the driving simulation device 1 toward the surface on which the display unit 11 is disposed. In this embodiment, it is assumed that the player operates with the Y-axis direction as the upper side in the vertical direction.

  As shown in FIG. 3, a moving image in which the driving state of the virtual vehicle 100 is drawn in the three-dimensional virtual space is reproduced on the display unit 11. In the moving image displayed on the display unit 11, the steering wheel 101, the rearview mirror 102, and the side mirror 103 are displayed as images in addition to the virtual space viewed from the driver's seat of the virtual vehicle 100. Depending on the driving state of the virtual vehicle 100, not only the scenery seen from the driver's seat of the virtual vehicle 100 but also the scenery displayed on the rearview mirror 102 and the side mirror 103 is changed, thereby realizing a more realistic driving simulation. Can be realized. The player can operate the steering wheel 101 of the virtual vehicle 100 by tilting the driving simulation device 1.

  The calculation unit 12 includes an operation angle calculation unit 120, a steering amount calculation unit 121, a steering rudder angle update unit 122, a moving image creation unit 123, and a timer 124. The calculation unit 12 includes a CPU (not shown). When the CPU executes a program (not shown) stored in the storage unit 13, the functions of the operation angle calculation unit 120, the steering amount calculation unit 121, and the like are exhibited. The The calculation unit 12 also includes functions other than the operation angle calculation unit 120, the steering amount calculation unit 121, the steering rudder angle update unit 122, the moving image creation unit 123, and the timer 124, but description thereof is omitted in this embodiment. To do.

  The operation angle calculation unit 120 calculates the inclination angle of the driving simulation device 1 as the operation angle from the acceleration detected by the acceleration sensor 10. The steering amount calculation unit 121 calculates the steering amount of the virtual vehicle 100 based on the steering angle of the virtual vehicle 100 and the operation angle calculated by the operation angle calculation unit 120. The steering rudder angle updating unit 122 updates the steering rudder angle of the virtual vehicle 100 based on the steering amount calculated by the steering amount calculating unit 121. The moving image creating unit 123 creates a moving image reflecting the updated steering angle, and reproduces it on the display unit 11. The timer 124 measures an elapsed time Δt since the previous steering angle θv was updated.

  The storage unit 13 includes a steering angle storage unit 130 and a curve information storage unit 131. The storage unit 13 includes a memory such as a ROM and a RAM. Various programs (not shown) stored in the storage unit 13 are stored in a storage medium (not shown) such as a hard disk, an optical disk, or a memory card. For example, programs from the storage medium to the storage unit 13 are stored in the storage unit 13. May be supplied. Various programs may be supplied to the storage unit 13 via a network such as the Internet. Note that information other than the steering angle storage unit 130 and the curve information storage unit 131 is also stored in the storage unit 13, but description thereof is omitted in this embodiment.

  The steering angle storage unit 130 stores the steering angle of the virtual vehicle 100. The curve information storage unit 131 stores information on conversion curves for obtaining the steering amount of the virtual vehicle 100. In the present embodiment, logistic curve information is stored as a conversion curve.

  Next, the driving simulation executed by the driving simulation apparatus 1 configured as described above will be described. FIG. 4 is a flowchart of a driving simulation routine according to the present embodiment, FIG. 5 is a flowchart of a steering angle calculation step of the driving simulation routine shown in FIG. 4, and FIG. 6 is a diagram showing an example of a logistic curve. Hereinafter, a description will be given with reference to FIGS. In addition, each step in the flowchart of the driving simulation routine described below is performed by executing various programs stored in the storage unit 13 by the calculation unit 12. In addition, each variable described below is initialized (for example, 0 is set) at the start of the driving simulation unless otherwise specified. Further, the driving simulation is started by executing the driving simulation routine of FIG. In the flowchart of the driving simulation routine described below, the driving simulation device 1 is described as the mobile terminal 1.

  In step S1, the operation angle θty of the driving simulation device 1, that is, the mobile terminal 1 is updated. Specifically, the steering angle θv of the virtual vehicle 100 is stored in the steering angle storage unit 130, and the tilt angle of the mobile terminal 1 is calculated as the operation angle θty based on the acceleration detected by the acceleration sensor 10. Here, the inclination angle around the Y axis obtained from the acceleration in the triaxial direction detected by the acceleration sensor 10 is calculated as the operation angle θty.

  In step S2, the updated steering angle θv ′ of the virtual vehicle 100 is calculated. Details will be described based on the flowchart shown in FIG.

  In step S21, a difference Δδvt between the operation angle θty of the mobile terminal 1 calculated in step S1 and the steering angle θv of the virtual vehicle 100 stored in the steering angle storage unit 130 is calculated. Specifically, the difference Δδvt between the ratio of the steering angle θv to the maximum angle θvmax that can be operated as the steering angle of the virtual vehicle 100 and the ratio of the operation angle θty to the maximum value θtmax of the inclination angle of the mobile terminal 1 is expressed by the following equation: Calculate from (1).

  Here, the maximum tilt angle θtmax of the mobile terminal is an angle at which the player can see the display unit 11 when the mobile terminal 1 is tilted with respect to the Y axis, for example, π / 4 (= 45). °). The maximum angle θvmax that can be operated as the steering angle of the virtual vehicle 100 is, for example, π (= 180 °). By calculating the difference Δδvt between the respective ratios, the amount of change in the operation angle θty of the mobile terminal 1 with respect to the steering angle θv of the virtual vehicle 100 is obtained.

  That is, when the operation angle θty of the mobile terminal 1 operated by the player and the steering angle θv of the virtual vehicle 100 are relatively coincident, the ratio of the steering angle θv and the ratio of the operation angle θty There is no difference between On the other hand, when the operation angle θty of the mobile terminal 1 operated by the player and the steering angle θv of the virtual vehicle 100 are relatively inconsistent, the ratio of the steering angle θv and the ratio of the operation angle θty are There is a difference between Accordingly, by calculating the difference Δδvt between the elapsed time Δt, the amount of change in the operation angle θty of the mobile terminal 1 with respect to the steering angle θv of the virtual vehicle 100 is obtained.

  In step S22, it is determined whether or not the absolute value of the difference Δδvt calculated in step S21 is zero. If the determination result is true (Yes), it is determined that there is no change in the tilt angle of the mobile terminal 1, and this flowchart is ended. On the other hand, if the determination result is false (No), it is determined that the inclination angle of the mobile terminal 1 has changed, and the process proceeds to step S23.

  In step S23, the steering amount coefficient δv of the steering of the virtual vehicle 100 in the conversion curve is obtained. In this embodiment, the logistic curve shown in FIG. 6 is used as the conversion curve. In this logistic curve, the steering amount coefficient δv smoothly changes with respect to the absolute value of the difference Δδvt calculated in step S21. Specifically, when the relationship between the steering amount coefficient δv and the absolute value of the difference Δδvt is expressed by a logistic curve, the change in the steering amount coefficient δv is small when the difference Δδvt is small, and the change in the steering amount coefficient δv is large as the difference Δδvt increases. After that, the change in the steering amount coefficient Δv becomes smaller again. For example, when the difference Δδvt is small, the change in the steering amount coefficient δv is relatively small, so that it is possible to suppress a sensitive reaction at the time of a minute operation, and it can be approximated to the steering behavior of an actual vehicle, The play of the steering wheel 101 of the virtual vehicle 100 can be reproduced. The conversion curve is not limited to a logistic curve as long as it is an S-shaped curve.

In step S24, the steering amount Δδv of the steering at the elapsed time Δt from the last update of the steering angle θv of the virtual vehicle 100 is calculated from the steering amount coefficient δv obtained in step S23. The steering amount Δδv is calculated from the following equation (2). The elapsed time Δt is measured by the timer 124.
Δδv = δv · Δt (2)

  In step S25, the steering amount Δδv of the steering is corrected with a correction coefficient c indicating the steering response. The corrected steering amount Δδv ′ is calculated from the following equation (3).

  In equation (3), for example, when the correction coefficient c is increased, the response of the steering wheel 101 becomes dull, that is, the steering angle θv changes smaller than the steering amount of the steering wheel 101 of the virtual vehicle 100. On the other hand, when the correction coefficient c is decreased, the response of the steering wheel 101 becomes sharp, that is, the steering angle θv changes more greatly than the steering amount of the steering wheel 101 of the virtual vehicle 100. By changing the correction coefficient c, it is possible to make the response of the steering wheel 101 to the player's preference.

In step S26, the smaller one of the difference Δδvt calculated in step S21 and the steering amount Δδv ′ calculated in step S25 is selected and stored in the change amount dx. The amount of change dx is obtained from the following equation (4).
dx = min (Δδv ′, Δδvt) (4)

  The function min in Expression (4) is a function that selects a small value among the variables in parentheses. The steering amount Δδv calculated in step S25 may be larger than the actual steering amount due to the steering amount coefficient δv obtained from the logistic curve and the correction by the elapsed time Δt and the correction coefficient c. In order to prevent this, the smaller one of the difference Δδvt and the change amount Δδv ′ is selected in Equation (4).

In step S27, the steering angle θv of the virtual vehicle 100 is updated according to the change amount dx calculated in step S26. The updated steering angle θv ′ is calculated from the following equation (5).
θv ′ = θv + dx · θvmax (5)

In step S <b> 3, a moving image of the driving state of the virtual vehicle 100 reflecting the updated steering rudder angle θv ′ is created, reproduced, and displayed on the display unit 11.
In step S4, it is determined whether or not the driving simulation has been completed. When the determination result is true (Yes), this flowchart is ended to end the driving simulation. On the other hand, when the determination result is false (No), the operation simulation is continued and the process returns to step S1. The end of the driving simulation may be determined by a command signal generated by operating an end button provided on the display unit 11 or a button provided on the mobile terminal 1, for example.

  As described above, in this embodiment, the difference Δδvt between the ratio of the steering angle θv to the maximum steering angle θvmax of the virtual vehicle 100 and the ratio of the operation angle θty to the maximum value θtmax of the mobile terminal 1 is set. Based on the conversion curve in which the relationship between the difference Δδvt and the steering amount coefficient δv of the steering of the virtual vehicle 100 is set, the steering amount Δδv is obtained, and the steering angle θv is updated based on the obtained steering amount Δδv. The updated steering angle θv ′ is calculated.

  By updating the steering angle θv of the virtual vehicle based on the steering amount Δδv obtained from the conversion curve in this way, a more realistic driving simulation can be realized.

Second Embodiment
Next, a second embodiment according to the present invention will be described. The present embodiment is different from the first embodiment in that a server device is provided, the mobile terminal is connected to the server device via a network, and other configurations are common. Therefore, description of common parts is omitted, and only differences are described.

  FIG. 7 is a schematic diagram of a driving simulation apparatus 1A according to the second embodiment of the present invention. FIG. 8 is a block diagram showing a schematic configuration of a driving simulation apparatus 1A according to the second embodiment of the present invention. Hereinafter, a description will be given with reference to FIGS.

  A driving simulation apparatus 1 </ b> A according to the second embodiment of the present invention includes a server apparatus 2 and a mobile terminal 3. The mobile terminal 3 is connected to the server device 2 via the network N.

  As illustrated in FIG. 8, the server device 2 includes a calculation unit 20, a storage unit 21, and a server communication unit 22. The calculation unit 20 includes a steering amount calculation unit 200, a steering rudder angle update unit 201, a moving image creation unit 202, and a timer 203. The calculation unit 20 is composed of a CPU, and a steering amount calculation unit 200, a steering rudder angle update unit 201, a moving image creation unit 202, and a timer 203 are executed when a CPU (not shown) executes a program stored in the storage unit 21. Each function is demonstrated. The calculation unit 20 also includes functions other than the steering amount calculation unit 200, the steering rudder angle update unit 201, the moving image creation unit 202, and the timer 203, but description thereof is omitted in this embodiment.

  The steering amount calculation unit 200 calculates the steering amount of the virtual vehicle 100 based on the difference between the steering angle of the virtual vehicle 100 and the operation angle calculated by the operation angle calculation unit 310 of the mobile terminal 3. The steering rudder angle update unit 201 updates the steering rudder angle of the virtual vehicle 100 based on the steering amount of the steering calculated by the steering amount calculation unit 200. The moving image creating unit 202 creates a moving image that reflects the updated steering angle. The timer 203 measures an elapsed time Δt since the previous steering angle was updated.

  The storage unit 21 includes a memory such as a ROM and a RAM. The storage unit 21 includes a steering rudder angle storage unit 210 and a curve information storage unit 211. The steering rudder angle storage unit 210 stores the steering rudder angle of the virtual vehicle 100. The curve information storage unit 211 stores a conversion curve for determining the steering amount.

  The server communication unit 22 communicates with the mobile terminal 3 via the network N, and transmits the steering angle of the virtual vehicle 100 calculated by the server device 2 to the mobile terminal 3 and is transmitted from the mobile terminal 3. Receive the operating angle.

The mobile terminal 3 is a portable terminal device that can be carried, and includes a terminal communication unit 30, a calculation unit (control unit) 31, an acceleration sensor (inertial sensor) 32, and a display unit 33.
The terminal communication unit 30 communicates with the server device 2 via the network N.

  The calculation unit 31 includes an operation angle calculation unit 310 and a moving image playback unit 311. The calculation unit 31 includes a CPU, and the functions of the operation angle calculation unit 310 and the moving image reproduction unit 311 are exhibited when the CPU executes a program stored in a memory such as a ROM or a RAM (not shown). Note that the calculation unit 31 has functions other than the operation angle calculation unit 310 and the moving image reproduction unit 311, but description thereof is omitted in this embodiment.

The operation angle calculation unit 310 calculates the tilt angle of the mobile terminal 3 based on the triaxial acceleration detected by the acceleration sensor 32.
The moving image reproduction unit 311 creates a moving image of the virtual vehicle 100 reflecting the steering angle of the virtual vehicle 100 transmitted from the server device 2 and displays the moving image on the display unit 33.

  A driving simulation executed by the driving simulation apparatus 1A configured as described above will be described. FIG. 9 is a flowchart performed by the calculation unit 20 of the server device 2 of the driving simulation routine according to the present embodiment, and FIG. 10 is a flowchart of the steering steering angle calculation step of the virtual vehicle of the driving simulation routine of FIG. Hereinafter, description will be made based on FIGS. 9 and 10. In addition, each step in the flowchart of the driving simulation routine described below is performed by executing various programs stored in the storage unit 21 of the server device 2 by the calculation unit 20. 9 is performed when the server apparatus 2 receives a driving simulation start request from the mobile terminal 3. Further, detailed steps S342 to S347 of step S34 described later are the same as steps S22 to S27 of FIG. 5 described in the first embodiment. In this embodiment, each step of FIG. Since the part 20 is different, the description of the common part is omitted.

  In step S31, the mobile terminal 3 is requested for an operation angle θty. When the mobile terminal 3 receives the request for the operation angle θty from the server device 2, the mobile terminal 3 calculates the tilt angle around the Y axis obtained from the acceleration in the three-axis directions detected by the acceleration sensor 32 as the operation angle θty and transmits the operation angle θty To do.

  In step S32, it is determined whether or not there is a response from the mobile terminal 3. If the determination result is true (Yes), it is determined that the operation angle θty is received from the mobile terminal 3, and the process proceeds to step S33. On the other hand, if the determination result is false (No), the operation angle θty cannot be received from the mobile terminal 3, and the process proceeds to step S34.

In step S33, the operation angle θty as a variable is updated with the operation angle θty of the mobile terminal 3 received in step S32.
In step S34, the updated steering angle θv ′ of the virtual vehicle 100 is calculated based on the operation angle θty of the mobile terminal 3. If the operation angle θty cannot be received from the mobile terminal 3 in step S32, the steering angle θv ′ updated based on the previously received operation angle θty is calculated. Details of step S34 will be described with reference to FIG.

  In step S341, a difference Δδvt between the operation angle θty of the mobile terminal 1 and the steering angle θv of the virtual vehicle 100 stored in the steering angle storage unit 210 is calculated. Specifically, the ratio of the steering angle θv to the maximum angle θvmax that can be operated as the steering angle of the virtual vehicle 100 and the ratio of the operation angle θty to the maximum value θtmax of the inclination angle of the mobile terminal 1 received from the mobile terminal 1. The difference Δδvt is calculated from the above equation (1).

  In step S342, it is determined whether or not the absolute value of the difference Δδvt calculated in step S341 is zero. If the determination result is true (Yes), it is determined that there is no change in the tilt angle of the mobile terminal 1, and this flowchart is ended. On the other hand, when the determination result is false (No), it is determined that the inclination angle of the mobile terminal 1 has changed, and the process proceeds to step S343.

In step S343, the steering amount coefficient δv of the steering of the virtual vehicle 100 in the conversion curve is obtained.
In step S344, a steering amount Δδv at an elapsed time Δt since the steering angle θv of the virtual vehicle 100 was updated last time is calculated. The steering amount Δδv is calculated from the above equation (2).

  In step S345, the steering amount Δδv of the steering is corrected with the correction coefficient c indicating the steering response. The corrected steering amount Δδv ′ is calculated from the above equation (3).

  In step S346, the smaller one of the difference Δδvt calculated in step S341 and the corrected steering amount Δδv ′ calculated in step S345 is selected and stored in the change amount dx. The change amount dx is obtained from the above-described equation (4).

  In step S347, the steering angle θv of the virtual vehicle 100 is updated according to the change amount dx calculated in step S346. The updated steering angle θv ′ is calculated from the above equation (5).

  In step S <b> 35, a moving image of the virtual vehicle 100 reflecting the updated steering rudder angle θv ′ is created and transmitted to the mobile terminal 3. If it is determined to be false (No) in step S342, the moving angle of the virtual vehicle 100 reflecting the steering steering angle θv before the update is created because there is no change in the tilt angle of the mobile terminal 1. After receiving the moving image from the server device 2, the mobile terminal 3 reproduces the moving image and displays it on the display unit 33.

  In step S36, it is determined whether or not to end the driving simulation. If the determination result is true (Yes), the driving simulation is terminated. On the other hand, if the determination result is false (No), the process returns to step S31 to continue the driving simulation. The end of the driving simulation may be determined based on, for example, whether the server device 2 has received a driving simulation end command signal from the mobile terminal 3.

  As described above, in the present embodiment, the ratio of the operation angle θty to the maximum value θtmax of the operation angle and the maximum value of the steering angle from the operation angle θty calculated based on the acceleration detected by the acceleration sensor 32 of the mobile terminal 3. The difference between the steering angle θv and the ratio of the steering angle θv to θvmax is calculated, the steering amount Δδv of the virtual vehicle 100 is obtained from the conversion curve, and the updated steering angle θv ′ is calculated. Thereby, the effect similar to the said 1st Embodiment is acquired.

Although the description of the embodiment has been completed above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.
For example, in each of the above embodiments, the tilt angle about the Y axis obtained from the accelerations in the three axis directions of the mobile terminals 1 and 3 is calculated as the operation angle θty. The angle axis may be changed. For example, when the player operates the mobile terminals 1 and 3 with the X axis set to the upper side in the vertical direction, the tilt angle about the X axis obtained from the acceleration in the three axis directions may be calculated as the operation angle θtx.

  In each of the above embodiments, the operation angle θty of the mobile terminals 1 and 3 is calculated from the acceleration of the mobile terminals 1 and 3 detected by the acceleration sensors 10 and 32 that are examples of the “inertia sensor”. The rotation angle θty of the mobile terminal 1 detected by an angular velocity sensor which is an example of an “inertia sensor” may be calculated.

1,1A Driving simulation device 10,32 Acceleration sensor (inertial sensor)
11, 33 Display unit 12, 20 Calculation unit (control unit)
120, 310 Operation angle calculation unit 121, 200 Steering amount calculation unit 122, 201 Steering steering angle update unit 123, 202 Movie creation unit

Claims (7)

A display unit;
An inertial sensor;
A control unit,
The control unit stores a steering angle of the virtual vehicle;
Means for calculating an operation angle from an output signal of the inertial sensor;
Based on the difference between the ratio of the steering angle of the virtual vehicle to the maximum steering angle of the virtual vehicle and the ratio of the operation angle to the maximum operable angle, the ratio of the steering angle of the virtual vehicle and the operation Means for calculating a steering amount of the virtual vehicle from a conversion curve that predefines a relationship of the steering amount of the virtual vehicle with respect to a difference from an angle ratio;
Means for updating the stored steering angle of the virtual vehicle based on the calculated steering amount;
A moving image display means for generating a moving image reflecting the updated steering angle of the virtual vehicle and displaying the moving image on the display unit;
A driving simulation apparatus comprising:   The driving simulation apparatus according to claim 1, wherein the conversion curve is a logistic curve.   The means for calculating the steering amount of the virtual vehicle includes means for further correcting the calculated steering amount based on a correction coefficient for determining the steering response of the virtual vehicle. 2. The driving simulation apparatus according to 2.   When the difference between the ratio of the operation angle and the ratio of the steering angle of the virtual vehicle is smaller than the calculated steering amount, the means for updating the steering angle is a ratio of the operation angle instead of the calculated steering amount. 4. The driving simulation device according to claim 1, wherein the steering rudder angle of the virtual vehicle is updated based on a difference between a steering rudder angle of the virtual vehicle and a ratio of a steering rudder angle of the virtual vehicle. A server device;
A mobile terminal device having an inertial sensor and a display unit and communicating with the server device via a network;
The mobile terminal device calculates an operation angle of the mobile terminal device from an output signal of the inertial sensor;
Means for transmitting the calculated operation angle and the maximum operable angle of the mobile terminal device to the server device;
Means for displaying the moving image transmitted from the server device on the display unit,
The server device stores a steering angle of a virtual vehicle;
The ratio of the steering angle of the virtual vehicle to the maximum steering angle of the steering of the virtual vehicle, and the operation angle transmitted from the portable terminal device to the maximum operable angle of the portable terminal device transmitted from the portable terminal device Based on the difference between the ratio of the steering angle of the virtual vehicle and the ratio of the steering angle of the virtual vehicle and the ratio of the steering angle of the virtual vehicle to the difference of the steering angle Means for calculating;
Means for updating the stored steering angle of the virtual vehicle based on the calculated steering amount;
Means for creating a moving image reflecting the updated steering angle of the virtual vehicle and transmitting it to the mobile terminal device;
A driving simulation apparatus comprising: A driving simulation program to be executed by a computer of a mobile terminal device having a display unit and an inertial sensor,
Means for storing the steering angle of the virtual vehicle;
Means for calculating an operation angle from an output signal of the inertial sensor;
Based on the difference between the ratio of the steering angle of the virtual vehicle to the maximum steering angle of the steering of the virtual vehicle and the ratio of the operation angle transmitted from the portable terminal device to the maximum operable angle, Means for calculating the steering amount of the virtual vehicle from a conversion curve that predefines the relationship of the steering amount of the virtual vehicle with respect to the difference between the ratio of the steering angle and the ratio of the operation angle;
Means for updating the steering angle of the virtual vehicle stored in the means for storing the steering angle based on the calculated steering amount;
As a means for displaying on the display unit to create a video that reflects the steering angle of the updated the virtual vehicle, drive simulation program for causing a computer to function of the portable terminal device. A driving simulation program to be executed by a computer of the server device in a network system including a server device and a mobile terminal device that communicates with the server device via a network,
Means for storing the steering angle of the virtual vehicle;
The ratio of the steering angle of the virtual vehicle to the maximum steering angle of the steering of the virtual vehicle and the portable terminal transmitted from the portable terminal device with respect to the maximum operable angle of the portable terminal device transmitted from the portable terminal device Based on a difference between the steering angle of the virtual vehicle and the ratio of the steering angle of the virtual vehicle and the ratio of the steering angle of the virtual vehicle based on a difference between the steering angle of the virtual vehicle and the virtual vehicle Means for calculating the steering amount of
Means for updating the steering angle of the virtual vehicle stored in the means for storing the steering angle based on the calculated steering amount;
As a means for transmitting to said portable terminal device to create a video that reflects the steering angle of the updated the virtual vehicle, drive simulation program for causing a computer to function of the server device.

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