阅读说明：本技术 位置调整装置以及具备其的投影系统 (Position adjusting device and projection system provided with same ) 是由 松井智司 胜山范一 于 2019-04-09 设计创作，主要内容包括：位置调整装置(60)具备：第1安装台(71b)、第2安装台(66a)、移动机构、加速度传感器(61)和信号输出部(72)。位置调整装置(60)被用于调整对移动体(200)的姿势的变动进行检测的姿势检测装置(40)向移动体(200)的安装位置。第1安装台(71b)被安装于移动体(200)的一部分。第2安装台(66a)被安装于姿势检测装置(40)。移动机构相对于第1安装台(71b),使第2安装台(66a)在包含相互正交的第1轴、第2轴以及第3轴的三个轴向之中的至少一个方向旋转移动。加速度传感器(61)被配置于第2安装台(66a)上。信号输出部(72)将来自加速度传感器(61)的检测信号输出到外部。(A position adjustment device (60) is provided with: a 1 st mounting table (71b), a 2 nd mounting table (66a), a moving mechanism, an acceleration sensor (61) and a signal output part (72). The position adjustment device (60) is used to adjust the mounting position of a posture detection device (40) for detecting a change in the posture of a mobile body (200) to the mobile body (200). The 1 st mounting table (71b) is mounted to a part of the movable body (200). The 2 nd mounting table (66a) is mounted on the attitude detection device (40). The moving mechanism makes the 2 nd mounting table (66a) rotate and move in at least one direction of three axial directions including a 1 st axis, a 2 nd axis and a 3 rd axis which are mutually orthogonal relative to the 1 st mounting table (71 b). The acceleration sensor (61) is disposed on the 2 nd mounting table (66 a). A signal output unit (72) outputs a detection signal from the acceleration sensor (61) to the outside.)

1. A position adjustment device that adjusts a mounting position of a posture detection device that detects a change in a posture of a movable body to the movable body, the position adjustment device comprising:

a 1 st mounting table mounted to a part of the movable body;

a 2 nd mounting table mounted to the attitude detecting device;

a moving mechanism that rotationally moves the 2 nd mounting stage relative to the 1 st mounting stage in at least one direction among three axial directions including a 1 st axis, a 2 nd axis, and a 3 rd axis that are orthogonal to each other;

an acceleration sensor disposed on the 2 nd mounting table; and

and a signal output unit configured to output a detection signal from the acceleration sensor to the outside.

2. The position adjustment apparatus according to claim 1,

the moving mechanism includes: a 1 st rotation mechanism for rotating and moving the 2 nd mounting table about the 1 st axis, and a 2 nd rotation mechanism for rotating and moving the 2 nd mounting table about the 2 nd axis,

the 1 st axis is an axis extending in a front-rear direction of the movable body in a state where the position adjustment device is attached to the movable body, and the 2 nd axis is an axis extending in a width direction of the movable body in a state where the position adjustment device is attached to the movable body.

3. The position adjustment apparatus according to claim 1,

the moving mechanism is provided with a 1 st rotating mechanism which rotates and moves the 2 nd mounting table by taking the 1 st shaft as a center,

the 1 st axis is an axis extending in the front-rear direction of the movable body in a state where the position adjustment device is attached to the movable body.

4. The position adjustment apparatus according to claim 1,

the moving mechanism is provided with a 2 nd rotating mechanism which rotates and moves the 2 nd mounting table by taking the 2 nd shaft as a center,

the 2 nd axis is an axis extending in the width direction of the movable body in a state where the position adjustment device is attached to the movable body.

5. The position adjustment apparatus according to claim 2,

the position adjustment device further includes: and a drive unit for driving the 1 st rotation mechanism and the 2 nd rotation mechanism, respectively.

6. The position adjustment apparatus according to claim 2,

the moving mechanism further includes: and a 3 rd rotation mechanism for rotating and moving the 2 nd mounting table around the 3 rd axis.

7. The position adjustment apparatus according to claim 1,

the moving mechanism further includes: and a slide mechanism for moving the 2 nd mounting table in parallel to the 1 st mounting table in at least one of the three axial directions.

8. The position adjustment apparatus according to claim 7,

the position adjustment device further includes: a driving section for driving the slide mechanism.

9. A projection system is provided with:

a posture detection device that detects a change in a posture of the mobile body;

a projection device that corrects a projection position and projects moving body information with reference to a detection result from the posture detection device; and

the position adjustment device according to any one of claims 1 to 8 that adjusts an installation posture of the posture detection device with respect to the mobile body.

10. The projection system of claim 9,

the gesture detection device includes: and a gyro sensor for detecting a change in the posture of the mobile body.

11. A projection system is provided with:

a posture detection device that detects a change in the posture of the mobile body;

a projection device that corrects a projection position and projects moving body information with reference to a detection result from the posture detection device;

the position adjustment device according to claim 5 that adjusts an installation posture of the posture detection device with respect to the mobile body; and

a correction processing device that receives a detection signal from the acceleration sensor and calculates a mounting position of the attitude detection device to the mobile body,

the position adjusting device includes a drive control section that controls the drive section,

the position adjusting means compares the mounting position calculated by the correction processing means with a predetermined adjustment value,

the drive control unit controls the drive unit based on the result of the comparison by the position adjustment device.

Technical Field

The present disclosure relates to a position adjustment device that adjusts a mounting position of a sensor that detects a posture of a moving body such as a vehicle, and a projection system including the same.

Background

Patent document 1 discloses a vehicle information projection system that performs Augmented Reality (AR) display using a head-up display (HUD) device. The HUD device projects light representing a virtual image on a windshield of a vehicle, and thereby allows an observer who is a passenger of the vehicle to visually recognize a real scene and the virtual image of the outside of the vehicle. For example, a virtual image representing a guidance route of the vehicle is displayed in association with a display object (e.g., a road) within the real scene. This allows the passenger to confirm the guidance route while visually confirming the real scene. The vehicle information projection system includes a vehicle speed sensor and corrects the display position of the virtual image based on the acceleration. This suppresses the occurrence of positional deviation of the virtual image at the time of rapid deceleration and rapid acceleration of the vehicle.

Prior art documents

Patent document

Patent document 1: JP 6201690A

Patent document 2: JP-A5-318250

Patent document 3: JP 2016-78162 publication

Patent document 4: JP 2016-82138 publication

Patent document 5: JP 2015-460 publication

Disclosure of Invention

Problems to be solved by the invention

The present disclosure provides a position adjustment device capable of accurately adjusting the mounting position of a sensor that detects the posture of a moving body such as a vehicle, and a projection system including the same.

Means for solving the problem

The position adjustment device of the present disclosure includes: the mounting device comprises a 1 st mounting table, a 2 nd mounting table, a moving mechanism, an acceleration sensor and a signal output part. The position adjustment device is used to adjust the mounting position of the posture detection device, which detects a change in the posture of the moving body, to the moving body. The 1 st mounting table is mounted to a part of the mobile body. The 2 nd mounting table is mounted on the attitude detection device. The moving mechanism rotates and moves the 2 nd mounting stage relative to the 1 st mounting stage in at least one direction of three axial directions including a 1 st axis, a 2 nd axis and a 3 rd axis which are orthogonal to each other. The acceleration sensor is disposed on the 2 nd mounting table. The signal output unit outputs a detection signal from the acceleration sensor to the outside.

A projection system according to an aspect of the present disclosure includes a posture detecting device, a projection device, and the above-described position adjusting device. The posture detection device detects a posture of the moving body. The projection device corrects the projection position and projects the moving body information with reference to the detection result from the posture detection device. The position adjustment device is used to adjust the installation posture of the posture detection device with respect to the moving body.

A projection system according to another aspect of the present disclosure includes a posture detection device, a projection device, the position adjustment device, and a correction processing device. The projection device corrects the projection position and projects the moving body information with reference to the detection result from the posture detection device. The position adjustment device is used to adjust the installation posture of the posture detection device with respect to the moving body. The correction processing device receives a detection signal from the acceleration sensor and calculates the mounting position of the attitude detection device to the moving body. The moving mechanism of the position adjusting device comprises: the mounting apparatus includes a 1 st rotating mechanism for rotating and moving a 2 nd mounting table about a 1 st axis, a 2 nd rotating mechanism for rotating and moving a 2 nd mounting table about a 2 nd axis, and a driving unit for driving the 1 st rotating mechanism and the 2 nd rotating mechanism, respectively. The position adjusting device includes a drive control unit that controls the drive unit, and compares the mounting position calculated by the correction processing unit with a predetermined adjustment value. The drive control unit controls the drive unit based on the comparison result of the position adjustment device.

Effect of invention

The present disclosure can provide a position adjustment device for accurately adjusting the mounting position of a sensor for detecting the posture of a moving body such as a vehicle, and can provide a projection system in which the posture detection accuracy of the moving body is improved.

Drawings

Fig. 1 is a diagram for explaining a projection system to which a position adjustment device is applied.

Fig. 2 is a block diagram showing a projection system according to embodiment 1.

Fig. 3 is a diagram for explaining a relationship between mounting accuracy of the gyro sensor to the vehicle and attitude detection accuracy.

Fig. 4 is a diagram for explaining a structure of mounting the posture detection device according to embodiment 1 to a vehicle.

Fig. 5 is a perspective view showing the configuration of a position adjustment device according to embodiment 1.

Fig. 6 is a diagram showing each component of the position adjustment device according to embodiment 1.

Fig. 7 is a flowchart showing a flow of position adjustment according to embodiment 1.

Fig. 8 is a diagram for explaining a method of calculating an angle from an acceleration sensor value.

Fig. 9 is a block diagram showing a projection system according to embodiment 2.

Fig. 10 is a development view illustrating the configuration of the position adjustment device according to embodiment 2.

Fig. 11 is a flowchart showing a flow of position adjustment according to embodiment 2.

Fig. 12 is a block diagram showing a projection system according to a modification of embodiment 2.

Detailed Description

Hereinafter, the embodiments will be described in detail with reference to the drawings as appropriate. Wherein unnecessary detailed explanation may be omitted. For example, detailed descriptions of known matters and repetitive descriptions of substantially the same structure may be omitted. This is to avoid unnecessarily obscuring the following description, as will be readily understood by those skilled in the art.

In addition, the inventors provide the drawings and the following description for those skilled in the art to fully understand the present disclosure, and do not intend to limit the subject matter described in the claims by these.

(embodiment mode 1)

Hereinafter, embodiment 1 will be described with reference to the drawings. First, the configuration of the projection system 100 to which the position adjustment device of the present disclosure is applied will be described. In embodiment 1, a case where the moving object is a vehicle such as an automobile, and the projection system is a head-up display (HUD) system that displays a virtual image in front of a windshield of the vehicle will be described as an example.

1-1. Structure of projection System

Fig. 1 is a diagram illustrating a projection system 100 to which the position adjustment apparatus of the present disclosure is applied. In fig. 1, a roll axis of vehicle 200 is defined as an X axis, a pitch axis of vehicle 200 is defined as a Y axis, and a yaw axis of vehicle 200 is defined as a Z axis. That is, the X axis is orthogonal to the Y axis and the Z axis and is an axis along the line of sight direction of the passenger D who visually recognizes the virtual image Iv. The Y axis is an axis along the left-right direction viewed from the passenger D who visually recognizes the virtual image Iv. The Z-axis is an axis along the height direction of the vehicle 200.

The projection system 100 is a HUD system that superimposes a virtual image Iv on a real scene in front of a windshield 210 of the vehicle 200 and performs so-called Augmented Reality (AR) display. The virtual image Iv represents predetermined information. For example, the virtual image Iv is a graphic or a character indicating a route to be guided to a destination, an estimated arrival time at the destination, a traveling direction, a speed, various warnings, and the like. The projection system 100 is provided in the vehicle 200, and projects the display light Lc representing the virtual image Iv into the display area 220 of the windshield 210 of the vehicle 200. In the present embodiment, the display area 220 is an area of a part of the windshield 210. In addition, the display area 220 may be the entire area of the windshield 210. The display light Lc passes through the windshield 210 and is reflected toward the inside of the vehicle. Thereby, the passenger (viewer) D in the vehicle 200 visually recognizes the reflected display light Lc as a virtual image Iv in front of the vehicle 200.

The projection system 100 includes a projection apparatus 10, an information acquisition apparatus 20, a display processing apparatus 30, a posture detection apparatus 40, and a correction processing apparatus 50.

The projection device 10 projects the display light Lc representing the virtual image Iv into the display area 220. The projection device 10 includes, for example, a liquid crystal display element that displays an image of the virtual image Iv, a light source such as an LED that illuminates the liquid crystal display element, a mirror and a lens that reflect display light Lc of the image displayed by the liquid crystal display element to the display area 220, and the like. The projection device 10 is provided in, for example, an instrument panel of the vehicle 200.

The information acquisition device 20 acquires information on the position of the vehicle 200 and the outside of the vehicle. Specifically, the information acquisition device 20 measures the position of the vehicle 200 and generates position information indicating the position. The information acquisition device 20 further acquires the object and vehicle exterior information indicating the distance to the object. The object is a person, a sign, a road, or the like. The information acquisition device 20 outputs vehicle-related information including position information of the vehicle 200 and vehicle exterior information.

The display processing device 30 controls display of the virtual image Iv based on the vehicle-related information obtained from the information acquisition device 20, and outputs image data of the virtual image Iv to the projection device 10. The display processing means 30 controls the display of the virtual image Iv based on the correction amount of the display position of the virtual image Iv obtained from the correction processing means 50. The correction amount will be described later. The display processing device 30 may also control the display of the virtual image Iv based on the vehicle-related information.

The posture detection device 40 detects a posture change of the vehicle 200.

The correction processing device 50 calculates the correction amount of the display position of the virtual image Iv based on the posture variation of the vehicle 200 detected by the posture detection device 40.

Fig. 2 is a block diagram showing an internal configuration of the projection system 100. The projection system 100 according to the present embodiment further includes a position adjustment device 60 and a notification device 80.

The information acquisition device 20 includes a gps (global Positioning system) module 21 that detects a position indicating the current location of the vehicle 200 in the geographic coordinate system. Specifically, the GPS module 21 receives radio waves from GPS satellites, and measures the latitude and longitude of the received location. The GPS module 21 generates position information indicating the latitude and longitude of the positioning. The information acquisition device 20 further includes a camera 22 that photographs an external scene and generates imaging data. The information acquisition device 20 specifies an object from the imaging data, and measures the distance to the object. The information acquisition device 20 generates the object and information indicating the distance to the object as vehicle exterior information. The information acquisition device 20 outputs vehicle-related information including the position information and the vehicle exterior information to the display processing device 30. The image data generated by the camera 22 may be output to the display processing device 30.

The display processing device 30 includes a communication unit 31, a display control unit 32, and a storage unit 33.

The communication unit 31 includes a circuit for performing communication with an external device in accordance with a predetermined communication standard (for example, LAN, Wi-Fi (registered trademark), Bluetooth (registered trademark), USB, HDMI (registered trademark), can (controller area network), or spi (serial peripheral interface)).

The display control unit 32 can be implemented by a semiconductor element or the like. The display control unit 32 may be constituted by a microcomputer, a CPU, an MPU, a GPU, a DSP, an FPGA, or an ASIC, for example. The function of the display control unit 32 may be implemented by hardware alone, or by a combination of hardware and software. The display control unit 32 reads data and programs stored in the storage unit 33 and performs various arithmetic processes to realize predetermined functions.

The storage unit 33 is a storage medium that stores programs and data necessary for realizing the functions of the display processing device 30. The storage unit 33 can be realized by, for example, a hard disk (HDD), an SSD, a RAM, a DRAM, a ferroelectric memory, a flash memory, a magnetic disk, or a combination of these.

The storage unit 33 stores a plurality of image data 33i representing the virtual image Iv. The display control unit 32 determines the virtual image Iv to be displayed based on the vehicle-related information obtained from the information acquisition device 20. The display control unit 32 reads the image data 33i of the determined virtual image Iv from the storage unit 33 and outputs the image data to the projection device 10. Further, the display control unit 32 sets the display position of the virtual image Iv. The display control unit 32 outputs display information indicating whether or not the virtual image Iv is displayed or whether or not it is being displayed to the correction processing device 50.

The posture detection device 40 includes a gyro sensor 41 that detects an angular velocity. The gyro sensor 41 outputs the detected angular velocity to the correction processing device 50 as attitude fluctuation information indicating the attitude fluctuation of the vehicle 200. The gyro sensor 41 is a sensor having three axes orthogonal to each other.

The position adjustment device 60 is disposed between the posture detection device 40 and the vehicle 200. The position adjusting device 60 is used to adjust the mounting angle of the posture detecting device 40 to the vehicle 200. The position adjusting device 60 detects the mounting angle of the posture detecting device 40 to the vehicle 200. The structure of the position adjustment device 60 will be described in detail later.

The correction processing device 50 includes a communication unit 51, a correction control unit 52, and a position calculation unit 53.

The communication unit 51 includes a circuit for performing communication with an external device in accordance with a predetermined communication standard (for example, LAN, Wi-Fi (registered trademark), Bluetooth (registered trademark), USB, HDMI (registered trademark), can (controller area network), or spi (serial peripheral interface)).

The correction control unit 52 can be realized by a semiconductor element or the like. The correction control unit 52 can be constituted by a microcomputer, a CPU, an MPU, a GPU, a DSP, an FPGA, or an ASIC, for example. The function of the display control unit 32 may be implemented by hardware alone, or by a combination of hardware and software. The correction control unit 52 reads data and programs stored in a storage unit, not shown, in the correction processing device 50 and performs various arithmetic operations, thereby realizing predetermined functions.

The correction control unit 52 includes, as functional components, a deviation amount calculation unit 52a and a correction amount calculation unit 52 b.

The deviation amount calculation unit 52a calculates the posture (the amount of angular deviation) of the vehicle 200 based on the posture variation information output from the posture detection device 40. For example, the deviation amount calculation unit 52a calculates the angles (roll angle, pitch angle, and yaw angle) of the vehicle 200 in the 3-axis direction by integrating the angular velocity detected by the gyro sensor 41. This makes it possible to calculate the amount of deviation (angle) of vehicle 200 in the rotational direction (roll direction, pitch direction, and yaw direction) about the X axis (roll axis), the Y axis (pitch axis), and the Z axis (yaw axis) shown in fig. 1. In the present embodiment, all angles in the 3-axis direction are calculated, but angles in the 1-axis or 2-axis direction may be calculated. For example, only the angles in the Y-axis and Z-axis directions may be calculated.

The correction amount calculation unit 52b calculates the correction amount of the display position of the virtual image Iv based on the posture (the amount of angular deviation) of the vehicle 200. Specifically, the correction amount calculation unit 52b converts the amount of deviation of the angle (pitch angle and yaw angle) calculated by the deviation amount calculation unit 52a into the number of pixels, and determines the correction amount for restoring the number of pixels of the deviation amount (hereinafter also referred to as the "number of pixels of deviation") to the original value. Regarding the roll angle, the roll angle is held and output. For example, the deviation amount calculation unit 52a determines such a correction amount that the deviation amount of the roll angle is restored to the original value. In the present embodiment, the correction amount is expressed by the number of pixels in the Y-axis direction and the Z-axis direction. The correction amount calculation unit 52b outputs the calculated correction amount to the display processing device 30.

The position calculating unit 53 calculates the mounting angle of the posture detecting device 40 based on the signal from the position adjusting device 60. The position calculating unit 53 can be realized by a semiconductor element or the like. The position calculating unit 53 can be constituted by a microcomputer, a CPU, an MPU, a GPU, a DSP, an FPGA, or an ASIC, for example. The position calculation unit 53 may be included in the correction control unit 52 as a functional configuration. The display processing device 30 and the correction processing device 50 perform bidirectional communication via the communication units 31 and 51. The display processing device 30 outputs display information to the correction processing device 50. The correction processing means 50 outputs the correction amount to the display processing means 30.

The notification device 80 includes a display, and displays a predetermined notification to the operator. The predetermined notification will be described later.

Subject matter of the present disclosure

Fig. 3 is a diagram for explaining a relationship between the mounting accuracy of the gyro sensor 41 to the vehicle 200 and the attitude detection accuracy. The gyro sensor 41 is a sensor having Xs, Ys, and Zs axes orthogonal to each other. In the projection system, the gyro sensor 41 must be installed such that its Xs, Ys, Zs axes are parallel with respect to the X, Y, Z axis of the vehicle 200, respectively.

Fig. 3 (a) shows a state in which the gyro sensor 41 is accurately mounted on the vehicle 200, that is, the Xs, Ys, and Zs axes are parallel to the X, Y, Z axis of the vehicle 200. Fig. 3 (b) shows a state in which the gyro sensor 41 is attached to the vehicle 200 while being displaced from the posture of fig. 3 (a) by an angle θ about the Xs axis.

In fig. 3 (a), the gyro sensor 41 detects an angular velocity in a rotational direction (roll direction) around the X axis of the vehicle 200 only around the Xs axis. The gyro sensor 41 detects an angular velocity in a rotation direction (pitch direction) around the Y axis only around the Ys axis. The gyro sensor 41 detects an angular velocity in a rotational direction (yaw direction) around the Z axis only around the Zs axis.

In contrast, in fig. 3 (b), the gyro sensor 41 detects the angular velocity in the rotational direction around the X axis only around the Xs axis. However, since the gyro sensor 41 is inclined around the Xs axis, the angular velocity in the rotation direction around the Y axis is detected while being resolved around the Ys axis and around the Zs axis. Similarly, the angular velocity in the rotational direction around the Z axis is detected while being resolved around the Ys axis and around the Zs axis.

Therefore, in the gyro sensor 41 shown in fig. 3 (b), the operation in the rotational direction around the Y axis and the rotational direction around the Z axis of the vehicle 200 cannot be accurately detected. Therefore, the correction processing device 50 cannot accurately calculate the amount of deviation of the vehicle 200, and the virtual image Iv in fig. 1 may be displayed deviated from the predetermined display object in the real scene. In particular, during traveling of vehicle 200, the angular velocity of vehicle 200 in the rotational direction (yaw direction) about the Z axis (yaw axis) is generally a considerably larger value than the angular velocity of vehicle 200 in the rotational direction (pitch direction) about the Y axis (pitch axis). Therefore, as shown in fig. 3 (b), when the gyro sensor 41 is attached to the vehicle 200 while being offset by the angle θ, the gyro sensor 41 erroneously detects a part of the angular velocity around the Z axis as the angular velocity around the Y axis in the detection of the angular velocity around the Ys axis. Therefore, when the gyro sensor 41 that detects the angular velocity of the vehicle 200 in the rotation direction around the Y axis is mounted on the vehicle 200, high accuracy is required for the mounting angle.

Therefore, in the present embodiment, the position adjustment device 60 is provided so that the gyro sensor 41 is mounted in a correct posture with respect to the vehicle 200. That is, as shown in fig. 4, the posture detection device 40 is fixed to the housing of the vehicle 200 via the position adjustment device 60. The position adjusting device 60 is configured to operate in a predetermined direction, and is configured to be capable of adjusting the mounting angle of the posture detecting device 40 to the vehicle 200.

1-3. Structure of position adjusting device

The position adjusting device 60 is a device that is rotated in the roll, pitch, and yaw directions to operate in the X, Y, and Z-axis directions, thereby adjusting the attachment angle of the attitude detecting device 40 to the vehicle 200. The X-axis is an example of the 1 st axis, the Y-axis is an example of the 2 nd axis, and the Z-axis is an example of the 3 rd axis. As shown in fig. 2, the position adjustment device 60 includes an acceleration sensor 61 and a signal output unit 72 for outputting a detection signal from the acceleration sensor 61 to the outside.

The acceleration sensor 61 is a 3-axis sensor having mutually orthogonal Xa, Ya, Za axes. The posture detecting device 40 is fixed to the position adjusting device 60 such that a plane including the Xs axis and the Ys axis (hereinafter, referred to as "XsYs plane") of the gyro sensor 41 is parallel to a plane including the Xa axis and the Ya axis (hereinafter, referred to as "XaYa plane") of the acceleration sensor 61.

In the adjustment of the attachment angle, the yaw angle of the gyro sensor 41 is adjusted so that the Xs and Ys axes of the gyro sensor 41 are parallel to the X, Y axis of the vehicle 200, respectively, based on the outer shape of the attitude detection device 40. The roll angle and the pitch angle of the gyro sensor 41 are adjusted based on the gravitational acceleration detected by the acceleration sensor 61 so that the XaYa plane of the acceleration sensor 61 is parallel to a plane (hereinafter, referred to as an "XY plane") including the X axis and the Y axis of the vehicle 200.

The signal output unit 72 is an output terminal for transmitting the detection signal by wire, and a signal transmission unit for transmitting the detection signal by wireless.

Hereinafter, a specific configuration of the position adjustment device 60 will be described.

Fig. 5 is a perspective view showing the structure of the position adjustment device 60. The position adjustment device 60 includes: a 3 rd rotation mechanism 66, a 2 nd rotation mechanism 67, a 1 st rotation mechanism 68, a 1 st slide mechanism 69, a 2 nd slide mechanism 70, a 3 rd slide mechanism 71, an acceleration sensor 61, and a signal output unit 72. The 3 rd rotation mechanism 66, the 2 nd rotation mechanism 67, the 1 st rotation mechanism 68, the 1 st slide mechanism 69, the 2 nd slide mechanism 70, and the 3 rd slide mechanism 71 are examples of moving mechanisms. On the 3 rd slide mechanism 71, a 2 nd slide mechanism 70, a 1 st slide mechanism 69, a 1 st rotation mechanism 68, a 2 nd rotation mechanism 67, and a 3 rd rotation mechanism 66 are stacked in this order. The acceleration sensor 61 and the signal output unit 72 are disposed on the 3 rd rotation mechanism 66. The 3 rd slide mechanism 71 is fixed to the vehicle 200. Above the 3 rd rotation mechanism 66, the posture detecting device 40 is fixed. Here, as shown in fig. 4, the posture detecting device 40 is disposed on the 3 rd rotation mechanism 66 so that Xs, Ys, and Zs axes, which are detection axes of the gyro sensor 41, are parallel to Xa, Ya, and Za axes, which are detection axes of the acceleration sensor 61, respectively.

The 3 rd rotation mechanism 66, the 2 nd rotation mechanism 67, and the 1 st rotation mechanism 68 are mechanisms for adjusting the attitude of the attitude detection device 40 in the yaw angle, pitch angle, and roll angle directions, respectively. The 1 st slide mechanism 69, the 2 nd slide mechanism 70, and the 3 rd slide mechanism 71 are mechanisms for adjusting the position of the posture detecting device 40 in the Z-axis, Y-axis, and X-axis directions, respectively.

Fig. 6 is a diagram showing each component of the position adjustment device 60.

Fig. 6 (a) shows the 3 rd rotation mechanism 66. The 3 rd rotation mechanism 66 includes: acceleration sensor 61, signal output unit 72, rotary table 66a, base 66b, operation unit 66c, and signal output unit 72. The rotary table 66a is an example of the 2 nd mount table.

The rotary table 66a is disposed on the base 66b so as to rotate about an axis parallel to the normal of the main surface thereof. The acceleration sensor 61 is disposed on the base 66b such that the XaYa plane thereof is parallel to the main surface of the rotary table 66a and the Za axis thereof is parallel to the normal line of the main surface of the rotary table 66 a. The rotary table 66a is rotated by operating the operation portion 66 c.

Fig. 6 (b) shows the 2 nd rotation mechanism 67. The 2 nd rotation mechanism 67 includes a base 67b, a rotation table 67a, and an operation portion 67 c. The rotary table 67a rotates in the direction of the arrow with respect to the base 67 b. The rotary table 67a is rotated by operating the operation unit 67 c.

Fig. 6 (c) shows the 1 st rotation mechanism 68. The 1 st rotation mechanism 68 includes a base 68b, a rotation table 68a, and an operation unit 68 c. The rotary table 68a rotates in the direction of the arrow with respect to the base 68 b. The rotary table 68a is rotated by operating the operation unit 68 c.

Fig. 6 (d) shows the 1 st slide mechanism 69. The 1 st slide mechanism 69 includes a base 69b, an elevating table 69a, and an operation unit 69 c. When the position adjusting device 60 is attached to the vehicle 200, the lifting table 69a moves in the Z-axis direction of the vehicle 200 with respect to the base 69 b. The lifting table 69a is moved by operating the operation unit 69 c.

Fig. 6 (e) shows the 2 nd slide mechanism 70. The 2 nd slide mechanism 70 includes a base 70b, a slide table 70a, and an operation unit 70 c. When the position adjustment device 60 is attached to the vehicle 200, the slide table 70a slides in the arrow direction, i.e., the Y-axis direction of the vehicle 200, with respect to the base 70 b. The slide table 70a slides by operating the operation unit 70 c.

Fig. 6 (f) shows the 3 rd slide mechanism 71. The 3 rd slide mechanism 71 includes a base 71b, a slide table 71a, and an operation portion 71 c. The base 71b is an example of the 1 st mounting stage. When the position adjustment device 60 is attached to the vehicle 200, the slide table 71a slides in the direction of the arrow, i.e., the X-axis direction of the vehicle 200, with respect to the base 71 b. The slide table 71a slides by operating the operation portion 71 c.

The 3 rd rotation mechanism 66, the 2 nd rotation mechanism 67, the 1 st rotation mechanism 68, the 1 st slide mechanism 69, the 2 nd slide mechanism 70, and the 3 rd slide mechanism 71 can be configured by using a known technique. For example, the structure may be configured using the techniques described in patent documents 2 to 5.

1-3. actions

The position adjustment of the posture detection device 40 of the projection system 100 having the above-described configuration will be described with reference to fig. 7 and 8.

As shown in fig. 4, the posture detection device 40 is attached to the vehicle 200 via the position adjustment device 60. The acceleration sensor 61 of the position adjustment device 60 transmits a detection signal indicating the posture of the acceleration sensor 61 to the correction processing device 50 via the signal output unit 72. The position calculation unit 53 of the correction processing device 50 calculates the attachment angle of the posture detection device 40 based on the detection signal received from the acceleration sensor 61. The notification device 80 displays the attachment angle calculated by the position calculation unit 53. The operator visually confirms the attachment angle displayed on the notification device 80 and manually operates the position adjustment device 60 to adjust the posture of the posture detection device 40. The operator operates the position adjusting device 60 until the attachment angle becomes appropriate, and adjusts the posture of the posture detecting device 40.

Fig. 7 is a flowchart showing the flow of the above-described position adjustment.

First, an operator sets an adjustment value for the notification device 80 (S101). The adjustment value is, for example, the angle in the pitch direction and the roll direction after the position adjustment desired by the operator. The adjustment value is set from an external device such as a personal computer, but is not limited thereto. For example, the posture detection device 40 may include an input unit, and the adjustment value may be set via the input unit.

Then, the position calculation unit 53 acquires the acceleration sensor values (Xa, Ya, Za) from the acceleration sensor 61 via the communication unit 51 (S102).

The position calculating part 53 calculates the acceleration sensor value based on(Xa, Ya, Za) to calculate the angle Φ in the pitch direction of the attitude detection device 40_XAngle phi with the direction of rolling_Y(S103). Fig. 8 is a diagram for explaining a method of calculating an angle from an acceleration sensor value. When the Xa, Ya, Za axes of the acceleration sensor 61 and the X, Y, Z axis of the vehicle 200 are inclined as shown in fig. 8, that is, the vehicle 200 is inclined downward by the angle Φ in the pitch direction_XAnd is inclined downward at an angle phi in the rolling direction of the vehicle_YIn the case of (1), (2) below, the angle (Φ) is calculated_X，Φ_Y)。

[ numerical formula 1]

[ numerical formula 2]

Returning to fig. 7, the notification device 80 notifies the angle (Φ) of the posture detection device 40 calculated by the position calculation unit 53_X，Φ_Y) Displayed on the notification device 80, and notified to the operator (S104). At this time, the notification device 80 displays the angle (Φ)_X，Φ_Y) And an adjustment value.

The angle (phi) of the operator to be displayed on the notification device 80_X，Φ_Y) And visually checking the adjustment value to determine the angle (phi)_X，Φ_Y) And the adjustment value is equal. After judging as the angle (phi)_X，Φ_Y) When the adjustment value is equal to the adjustment value (yes in S105), the operator fixes the position adjusting device 60 and ends the adjustment.

On the other hand, when the angle is judged to be (phi)_X，Φ_Y) If the adjustment value is not equal to the adjustment value (no in S105), the operator manually adjusts the posture of the position adjustment device (S106). Then, the position calculation section 53 proceeds again to step S102 to step S105. In this way, the operator can adjust the position of the posture detection device 40.

1-4 summary of

As described above, the position adjustment device 60 includes: a base 71b, a rotary table 66a, moving mechanisms 66-71, an acceleration sensor 61, and a signal output unit 72. The base 71b is attached to a part of the vehicle 200. The rotary table 66a is attached to the posture detection device 40. The moving mechanisms 66-71 make the rotary table 66a rotate and move in at least two orthogonal axial directions relative to the base 71 b. The acceleration sensor 61 is disposed on the rotary table 66 a. The signal output unit 72 transmits a detection signal of the acceleration sensor 61.

The moving mechanism of the position adjusting device 60 includes a 1 st rotation mechanism 68 and a 2 nd rotation mechanism 67. The 1 st rotation mechanism 68 rotationally moves the rotary table 66a in the tumble direction. The 2 nd rotation mechanism 67 rotates and moves the rotary table 66a in the pitch direction. The roll direction is a direction that rotates around an axis parallel to an axis extending in the front-rear direction of the vehicle 200 in a state where the position adjustment device 60 is attached to the vehicle 200. The pitch direction is a direction that rotates around an axis parallel to an axis extending in the width direction of the vehicle 200 in a state where the position adjustment device 60 is attached to the vehicle 200. The front-rear direction of vehicle 200 refers to the direction of travel of vehicle 200.

Thus, the operator can manually adjust the posture of the rotary table 66a with respect to the base 71b in the roll direction and the pitch direction.

The moving mechanism of the position adjusting device 60 further includes a 3 rd rotation mechanism 66. The 3 rd rotation mechanism 66 rotationally moves the rotary table 66a in the yaw direction. The yaw direction is a direction that rotates around an axis parallel to an axis orthogonal to an axis extending in the front-rear direction and an axis extending in the width direction of the vehicle 200 in a state where the position adjustment device 60 is attached to the vehicle 200.

This enables the operator to manually adjust the posture of the rotary table 66a with respect to the base 71b in the yaw direction.

The moving mechanism of the position adjusting device 60 further includes a 1 st slide mechanism 69, a 2 nd slide mechanism 70, and a 3 rd slide mechanism 71. The 1 st slide mechanism 69 slides and moves the rotary table 66a in the Z-axis direction in a state where the position adjusting device 60 is attached to the vehicle 200. The 2 nd slide mechanism 70 slides and moves the rotary table 66a in the Y-axis direction in a state where the position adjusting device 60 is attached to the vehicle 200. The 3 rd slide mechanism 71 slides and moves the rotary table 66a in the X-axis direction in a state where the position adjusting device 60 is attached to the vehicle 200.

Thus, the operator can manually move the rotary table 66a in the X-axis, Y-axis, and Z-axis directions while maintaining the postures of the rotary table 66a in the roll direction, pitch direction, and yaw direction with respect to the base 71 b.

The projection system 100 includes a posture detection device 40, a projection device 10, and a position adjustment device 60. The posture detection device 40 detects the posture of the vehicle 200. The projection device 10 corrects the projection position and projects the vehicle information with reference to the detection result from the posture detection device 40. The position adjusting device 60 is used to adjust the installation posture of the posture detecting device 40 with respect to the vehicle 200.

Thus, the operator can manually adjust the posture of the posture detecting device 40 with respect to the vehicle 200 by operating the position adjusting device 60. Accordingly, the present disclosure can provide a projection system in which the attitude detection accuracy of the vehicle 200 is improved.

(embodiment mode 2)

In embodiment 1, a position adjustment device in which an operator manually adjusts the position is described. In contrast, in the present embodiment, a position adjustment device that automatically performs position adjustment will be described.

2-1. Structure of projection system

Fig. 9 is a block diagram showing an internal configuration of the projection system 100a according to the present embodiment. The projection system 100a includes a position adjustment device 60a instead of the position adjustment device 60 of embodiment 1.

The position adjustment device 60a includes a drive control unit 62 and a plurality of drive units 66d to 71d in addition to the acceleration sensor 61 in the configuration of embodiment 1. The driving units 66d to 71d are collectively referred to by reference numeral 63.

The driving unit 63 is constituted by a motor, an actuator, and the like.

The drive control unit 62 is configured by a communication circuit that performs communication with an external device, a drive circuit that performs drive control of the drive unit 63 in accordance with a control command from the external device, and the like.

The acceleration sensor 61 outputs a detection signal indicating the posture of the position adjustment device 60a, which is the posture detection device 40, to the correction processing device 50 as the mounting angle information of the posture detection device 40. The correction processing device 50 drives the driving unit 63 via the drive control unit 62. The position adjustment device 60a changes the posture of the posture detection device 40 with respect to the vehicle 200 by the drive unit 63.

Fig. 10 is a diagram showing each component of the position adjustment device 60a in the present embodiment.

Fig. 10 (a) shows the 3 rd rotation mechanism 66'. The 3 rd rotation mechanism 66' includes a driving unit 66d in addition to the configuration of embodiment 1. The driving unit 66d is coupled to the operation unit 66c and can operate the rotary table 66 a.

Fig. 10 (b) shows the 2 nd rotation mechanism 67'. The 2 nd rotation mechanism 67' includes a driving unit 67d in addition to the configuration of embodiment 1. The driving unit 67d is coupled to the operation unit 67c and can operate the rotary table 67 a.

Fig. 10 (c) shows the 1 st rotation mechanism 68'. The 1 st rotation mechanism 68' includes a driving unit 68d in addition to the configuration of embodiment 1. The driving unit 68d is coupled to the operation unit 68c and can operate the rotary table 68 a.

Fig. 10 (d) shows the 1 st slide mechanism 69'. The 1 st slide mechanism 69' includes a driving unit 69d in addition to the configuration of embodiment 1. The driving unit 69d is coupled to the operation unit 69c and can operate the elevating table 69 a.

Fig. 10 (e) shows the 2 nd slide mechanism 70'. The 2 nd slide mechanism 70' includes a driving unit 70d in addition to the configuration of embodiment 1. The driving unit 70d is coupled to the operation unit 70c and can operate the slide table 70 a.

Fig. 10 (f) shows the 3 rd slide mechanism 71'. The 3 rd slide mechanism 71' includes a driving unit 69d in addition to the configuration of embodiment 1. The driving unit 71d is coupled to the operation unit 71c and can operate the slide table 71 a.

2-2. actions

The position adjustment process of the posture detection device 40 of the projection system 100a having the above configuration will be described with reference to fig. 11. Fig. 11 is a flowchart showing the flow of the above-described position adjustment.

The acceleration sensor 61 of the position adjustment device 60a transmits a detection signal indicating the posture of the posture detection device 40, which is the acceleration sensor 61, to the correction processing device 50 via the signal output unit 72. The position calculation unit 53 of the correction processing device 50 calculates the attachment angle of the posture detection device 40 based on the detection signal received from the acceleration sensor 61. The correction processing device 50 operates the position adjustment device 60 until the attachment angle becomes appropriate, and adjusts the posture of the posture detection device 40.

First, the position calculation unit 53 acquires an adjustment value (S201). The adjustment value is, for example, the angle in the pitch direction and the roll direction after the position adjustment desired by the operator. The adjustment value is set from an external device such as a personal computer, but is not limited thereto. For example, the posture detection device 40 may include an input unit, and the adjustment value may be set via the input unit.

Then, the position calculation unit 53 acquires the acceleration sensor values (Xa, Ya, Za) from the acceleration sensor 61 via the communication unit 51 (S202).

The position calculation unit 53 calculates an angle Φ in the pitch direction of the posture detection device 40 from the acceleration sensor values (Xa, Ya, Za)_XAngle phi with the direction of rolling_Y(S203). The calculation method is the same as step S103 in fig. 7 according to embodiment 1.

The angle (Φ) of the position calculation unit 53 with respect to the posture detection device 40_X，Φ_Y) And whether or not the adjustment value is equal to the adjustment value is judged (S204).

The position calculation unit 53 determines that the angle (Φ) of the posture detection device 40 is_X，Φ_Y) When the angle is equal to the adjustment value (YES in S204), the angle (Φ) is adjusted_X，Φ_Y) The adjustment value is displayed on the display of the notification device 80 and notified to the operator (S20)5) And finishing the adjustment.

On the other hand, the position calculating unit 53 determines that the angle (Φ) of the posture detecting device 40 is within the predetermined range_X，Φ_Y) If the adjustment value is not equal (no in S204), the drive control unit 62 acquires the target value via the communication unit 51 (S206).

The drive control unit 62 drives the driving unit 63 based on the received target value to adjust the mounting angle of the posture detecting device 40 (S207).

When determining that the driven angle is equal to the target value (yes in S208), the drive control unit 62 stops the drive of the drive unit 63 and proceeds again from step S202 to step S104.

When determining that the driven angle is not equal to the target value (no in S208), the drive control unit 62 proceeds to step S207.

2-3 summary of

As described above, the position adjustment device 60a further includes the driving units 67d and 68d, compared to the position adjustment device 60 according to embodiment 1. The driving unit 67d drives the 2 nd rotation mechanism 67'. The driving unit 68d drives the 1 st rotation mechanism 68'.

Thus, the position adjustment device 60a can automatically adjust the postures of the rotary table 66a in the roll direction and the pitch direction with respect to the base 71 b.

The position adjustment device 60a further includes driving units 69d, 70d, and 71d, compared to the position adjustment device 60 according to embodiment 1. The driving section 69d drives the 1 st slide mechanism 69'. The driving section 70d drives the 2 nd slide mechanism 70'. The driving section 71d drives the 3 rd slide mechanism 71'.

Thus, the position adjusting device 60a can automatically adjust the postures of the rotary table 66a in the X-axis, Y-axis, and Z-axis directions with respect to the base 71 b.

The projection system 100 includes a posture detection device 40, a projection device 10, and a position adjustment device 60 a. The posture detection device 40 detects the posture of the vehicle 200. The projection device 10 corrects the projection position and projects the vehicle information with reference to the detection result from the posture detection device 40. The position adjustment device 60a is used to adjust the installation posture of the posture detection device 40 with respect to the vehicle 200.

Thus, the position adjustment device 60 can automatically adjust the posture of the posture detection device 40 with respect to the vehicle 200, and therefore the operator can easily adjust the posture of the posture detection device 40 with respect to the vehicle 200. Accordingly, the present disclosure can provide a projection system in which the attitude detection accuracy of the vehicle 200 is further improved.

(other embodiments)

As described above, the embodiments have been described as examples of the technique disclosed in the present application. However, the technique in the present disclosure is not limited to this, and can be applied to an embodiment in which changes, substitutions, additions, omissions, and the like are appropriately made. Further, the components described in the above embodiments may be combined to form a new embodiment.