阅读说明：本技术 一种扩大投影移动范围的电机精确控制方法及装置 (Motor accurate control method and device for expanding projection movement range ) 是由 安文 刘玉龙 吴雷 于 2020-12-29 设计创作，主要内容包括：本发明涉及投影技术领域,公开了一种扩大投影移动范围的电机精确控制方法及装置,包括S1：将电机转动一圈的步数进行细分；S2：在移动的的影像中设置若干关键帧位点,通过关键帧位点确定电机在X轴和Y轴的转动位置；S3：将转动位置信号转换为电压脉冲输出到电机,每一个脉冲电机转动一步。S4：电机控制镜片进行角度调节。本发明将投影画面投射到其他空间中实现画面在大场景范围中的移动,提高了单台投影移动范围的,通过对电机的精确控制,保证投影画面的准确性。(The invention relates to the technical field of projection, and discloses a motor accurate control method and device for expanding a projection movement range, which comprises the following steps of S1: subdividing the number of steps of one circle of rotation of the motor; s2: setting a plurality of key frame points in the moving image, and determining the rotation positions of the motor on the X axis and the Y axis through the key frame points; s3: and converting the rotation position signal into voltage pulses and outputting the voltage pulses to the motors, wherein each pulse motor rotates by one step. S4: the motor controls the lens to adjust the angle. The invention projects the projection picture into other spaces to realize the movement of the picture in a large scene range, improves the movement range of single projection, and ensures the accuracy of the projection picture through the accurate control of the motor.)

1. A motor accurate control method for expanding projection moving range is characterized by comprising the following steps of S1: subdividing the number of steps of one circle of rotation of the motor;

s2: setting a plurality of key frame points in the moving image, and determining the rotation positions of the motor on the X axis and the Y axis through the key frame points;

s3: converting the rotation position signal, outputting different voltage signals and sending the signals to a driver;

s4: the driver receives different voltage signals to drive the motors to rotate, and each pulse signal motor rotates for one subdivision, so that the motors drive the lenses to carry out corresponding angle adjustment.

2. The method as claimed in claim 1, wherein the step S1 of subdividing the number of steps of one rotation of the motor comprises:

s10: subdividing the step number once through a dial switch in a driver;

s11: and carrying out secondary subdivision on the step number of the primary subdivision through a speed reducer.

3. An apparatus for expanding projection moving range, based on the method of claims 1-2, characterized by comprising a projector (1), a control mechanism (2), a driving mechanism and a lens (8), wherein the control mechanism (2) comprises a network control module and a driver, the network control module is connected with the driver, the network control module is used for processing the input image moving information, the driver is connected with the driving mechanism, the driving mechanism is connected with the lens (8), and the driver controls the motor in the driving mechanism to rotate, so as to realize the angle adjustment of the lens (8).

4. A device for extending the movement range of projection according to claim 3, wherein the projector (1) is fixed on the control mechanism (2) and is disposed opposite to the lens (8), a mounting frame (7) is fixed on the control mechanism (2), and the driving mechanism is mounted on the mounting frame (7).

5. The device for expanding the projection moving range according to claim 4, wherein the driving mechanism comprises an X-axis driving member (3) and a Y-axis driving member (4), the Y-axis driving member (4) is mounted on the mounting frame (7), and the Y-axis driving member (4) is connected with the X-axis driving member (3) through a rotating rod (6).

6. The device for expanding the moving range of the projection as claimed in claim 5, wherein the Y-axis driving member (4) comprises a Y-axis motor set (40), the Y-axis motor set (40) is fixed on the mounting frame (7), the output end of the Y-axis motor set (40) is connected with a Y power rod, and the Y power rod is fixedly connected with one end of the rotating rod (6).

7. The device for expanding the projection moving range according to claim 5, wherein the X-axis driving component (3) comprises an X-axis motor set (30), an X power rod is connected to the output end of the X-axis motor set (30), the X power rod is fixedly connected with the rotating rod (6), and the X-axis motor set (30) is fixedly connected with the lens (8).

8. The apparatus of claim 6 or 7, wherein the X-axis motor set (30) and the Y-axis motor set (40) each comprise a motor and a reducer.

9. The apparatus of claim 8, wherein the motor is an ac servo motor.

10. The device for enlarging the projection area of the projector (1) as claimed in claim 4, wherein the mounting bracket (7) comprises a bracket body (70) and a housing (71), the bracket body (70) is fixedly mounted on the control mechanism (2), the housing (71) is connected to one end of the bracket body (70) far away from the control mechanism (2), and the X-axis motor is fixed in the housing (71).

Technical Field

The invention relates to the technical field of projection, in particular to a motor accurate control method and device for expanding a projection moving range.

Background

If an image is projected in a large space, a plurality of projectors are required to perform picture fusion in the traditional method, a DL3 digital lamp can only be used when a large scene range of a single picture moves, the projector is fixed in a lamp barrel similar to a follow spot lamp and rotates in the space, and therefore the picture projected by the projector moves in the space. However, the method has the disadvantages of large damage to the projector, built-in fixed options of the projector, no change, small selectivity and poor picture stability. In order to solve the problems of the products in the prior art, it is urgently needed to provide a device for realizing the movement of the picture in a large scene range and ensuring the accuracy of the movement of the projected picture.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a motor accurate control method and a motor accurate control device for expanding the projection moving range, which can project a projection picture into other spaces to realize the movement of the picture in a large scene range, improve the moving range of single projection, and ensure the accuracy of the projection picture through the accurate control of the motor.

In order to achieve the above purpose, the invention provides the following technical scheme:

a motor accurate control method for enlarging projection moving range includes

S1: subdividing the number of steps of one circle of rotation of the motor;

s2: setting a plurality of key frame points in the moving image, and determining the rotation positions of the motor on the X axis and the Y axis through the key frame points;

s3: converting the rotation position signal, outputting different voltage signals and sending the signals to a driver;

s4: the driver receives different voltage signals to drive the motors to rotate, and each pulse signal motor rotates for one subdivision, so that the motors drive the lenses to carry out corresponding angle adjustment.

In the present invention, the step S1 of subdividing the number of steps of one rotation of the motor includes:

s10: subdividing the steps once through a motor and a driver;

s11: and carrying out secondary subdivision on the number of the primary divided steps through a speed reducer.

A device for expanding projection moving range comprises a projector, a control mechanism, a driving mechanism and a lens, wherein the control mechanism comprises a network control module and a driver, the network control module is connected with the driver, the network control module is used for processing input image moving information, the driver is connected with the driving mechanism, the driving mechanism is connected with the lens, and the driver controls a motor in the driving mechanism to rotate, so that the angle of the lens is adjusted.

In the invention, further, the projector is fixed on the control mechanism and is arranged opposite to the lens, a mounting frame is fixed on the control mechanism, and the driving mechanism is mounted on the mounting frame.

In the invention, further, the driving mechanism comprises an X-axis driving part and a Y-axis driving part, the Y-axis driving part is mounted on the mounting frame, and the Y-axis driving part is connected with the X-axis driving part through a rotating rod.

In the invention, further, the Y-axis driving part comprises a Y-axis motor set, the Y-axis motor set is fixed on the mounting frame, an output end of the Y-axis motor set is connected with a Y power rod, and the Y power rod is fixedly connected with one end of the rotating rod.

In the invention, further, the X-axis driving part comprises an X-axis motor set, an output end of the X-axis motor set is connected with an X power rod, the X power rod is fixedly connected with the rotating rod, and the X-axis motor set is fixedly connected with the lens.

In the invention, further, the X-axis motor set and the Y-axis motor set both include a motor and a reducer.

In the present invention, preferably, the motor is an ac servomotor.

In the invention, preferably, the mounting rack comprises a rack body and a shell, the rack body is fixedly mounted on the control mechanism, one end of the rack body, which is far away from the control mechanism, is connected with the shell, and the X-axis motor is fixed in the shell.

Compared with the prior art, the invention has the beneficial effects that:

(1) the motor drives the reflecting mirror surface to move on an X axis and a Y axis, the projection image is projected on the reflecting mirror surface, the motor rotates, the image is reflected on the mirror surface for the first time, the projection position is changed, the projection image is projected in other spaces to realize the movement of the image in a large scene range, and the moving range of the single projection is improved.

(2) The rotation positions of the motors on the X axis and the Y axis are determined through key frame positions and are transmitted to a network control module for processing, two paths of signals are fed back to drivers of the X axis and the Y axis by the network control module, a decoder in the driver reads data into corresponding voltage pulses and outputs the voltage pulses to the motors, each pulse motor rotates one step, the frequency peak width of the pulses determines the moving speed of the pulse motor, the motors are driven to rotate according to step angles, accurate rotation control of the mirrors driven by the motors is achieved, and accuracy of projection pictures is guaranteed. And secondly, the alternating current servo driving motor is selected, the inertia of the rotor of the alternating current servo motor is small, the dynamic response is good, the displacement corner can be accurately finished, and the influence on the picture caused by the dynamic shaking caused by the inertia is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a flow chart of a method for accurately controlling a motor to extend a projection movement range according to the present invention;

FIG. 2 is a signal flow diagram of a method for accurately controlling a motor to extend a projection movement range according to the present invention;

FIG. 3 is a schematic diagram of the overall structure of an apparatus for extending the projection moving range according to the present invention;

FIG. 4 is a schematic diagram of a partial structure of an apparatus for expanding a projection moving range according to the present invention;

FIG. 5 is a schematic view of a partial cross-sectional structure of an apparatus for extending the projection movement range according to the present invention;

fig. 6 is a schematic diagram of an apparatus for extending a projection movement range according to the present invention.

In the figure: 1. a projector; 2. a control mechanism; 3. an X-axis drive member; 30. an X-axis motor set; 31. an X-axis power rod; 4. a Y-axis drive member; 40. a Y-axis motor set; 41. a Y-axis power bar; 6. rotating the rod; 7. a mounting frame; 70. a frame body; 71. a housing; 8. a lens.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, a preferred embodiment of the present invention provides a method and an apparatus for precisely controlling a motor to expand a projection moving range, so as to realize a device for moving a picture in a large scene range and ensure the accuracy of the movement of the projection picture.

The invention provides a motor accurate control method for expanding a projection movement range, which comprises the following steps:

s1: subdividing the number of steps of one circle of rotation of the motor;

s2: setting a plurality of key frame points in the moving image, and determining the rotation positions of the motor on the X axis and the Y axis through the key frame points;

s3: converting the rotation position signal, outputting different voltage signals and sending the signals to a driver;

s4: the driver receives different voltage signals to drive the motors to rotate, and each pulse signal motor rotates for one subdivision, so that the motors drive the lenses to carry out corresponding angle adjustment.

Specifically, an image moving path, namely a correct projection position of a light and shadow is determined by a known image fragment script, a plurality of key frames are selected in the light and shadow path process, the minimum unit of influence in the moving process is influenced, namely a single image picture is a frame which is equivalent to each frame of lens image on a film, the key frames are equivalent to an original picture in a two-dimensional animation, a frame where a key action in the motion or change of a character or an object is located is pointed, the key frames can also be set at a position where a larger image is changed, and the key frames are set by manual operation according to actual needs. The method comprises the steps of determining the position distance of an image needing to move in space through a key frame, wherein the position distance comprises the moving distance and the moving time of two dimensions of an X axis and a Y axis, the set moving distance and the time are different due to the requirements of different projection spaces, the process needs to be determined according to the manual measurement of a field actual space, set data are calculated by a computer, the moving angle and the moving speed of a motor in the X axis and the Y axis are obtained to determine the rotating position of the motor, the computer is communicated with a network control module through a network cable, data transmission is carried out through a UDP protocol, the information is processed according to the network control module, different output voltage signals are sent to a driver, the driver receives different voltage signals to drive the motor to rotate, and the motor drives a lens to carry out angle conversion so as to realize the movement of a picture in a large scene.

In the present invention, the step S1 of subdividing the number of steps of one rotation of the motor includes:

s10: subdividing the steps once through a motor and a driver;

s11: and carrying out secondary subdivision on the number of the primary divided steps through a speed reducer.

Specifically, in order to realize precise control of the motor, in a specific embodiment provided by the invention, the selected alternating current servo motor is selected, the performance of the selected motor determines that the motor needs to go 200 steps every turn, namely, the motor rotates 1.8 degrees every step, 128 subdivision is determined by a dial switch in a motor driver, each step can be subdivided into 128 equal divisions, and therefore, the motor and the driver determine that the motor goes 128 × 200 to 25600 subdivision every turn. Since the equipment needs the motor to rotate slowly and accurately and have slight movement, the invention adds 10 times of speed reducers, and each turn of the motor is divided into 25600 by 10 as 256000. The motor rotates a subdivision, and the device drives the mirror surface to move one step, so that the motor can accurately control the rotation of the lens. In a preferred embodiment of the present invention, the first key frame and the first step of the motor are synchronously configured, so that the synchronicity between the start state of the key frame and the start state of the motor can be ensured, and the configuration of the whole data is facilitated.

Based on the above method, the present invention provides a device for expanding a projection moving range, please refer to fig. 2 to fig. 6, which includes a projector 1, a control mechanism 2, a driving mechanism and a lens 8, wherein the projector 1 is fixedly connected to a housing of the control mechanism 2, the control mechanism 2 includes a network control module and a driver, the network control module is connected to the driver, the network control module is used for processing input image moving information, the driver is connected to the driving mechanism, the driving mechanism is connected to the lens 8, and the driver controls a motor in the driving mechanism to rotate, so as to adjust an angle of the lens 8.

In the invention, the set displacement moving distance and time are calculated by a computer to obtain the angle and the speed of the motor moving in the X axis and the Y axis, the angle and the speed are transmitted to a network control module, the network control module processes data and feeds two paths of signals back to drivers of the X axis and the Y axis, a decoder in the driver reads the data into corresponding voltage pulses and outputs the voltage pulses to the motor, each pulse motor rotates for subdivision, the moving speed of the pulse is determined by the frequency peak width of the pulse, so that the motor is driven to rotate according to step angles, the precise rotation control of the motor driving a mirror is realized, and the accuracy of a projection picture is ensured.

In the present invention, further, the projector 1 is fixed on the control mechanism 2 and is disposed opposite to the lens 8, the mounting bracket 7 is fixed on the control mechanism 2, the mounting bracket 7 includes a bracket body 70 and a housing 71, the bracket body 70 is fixedly mounted on the control mechanism 2, one end of the bracket body 70, which is far away from the control mechanism 2, is connected to the housing 71, and the housing 71 is mounted with a driving mechanism. In the invention, the driving mechanism is fixed through the mounting frame 7, and meanwhile, a rotating space is reserved for the lens 8, so that the lens 8 can rotate at multiple angles.

In the present invention, further, the driving mechanism includes an X-axis driving member 3 and a Y-axis driving member 4, the Y-axis driving member 4 is mounted on the mounting frame 7, and the Y-axis driving member 4 is connected to the X-axis driving member 3 through a rotating rod 6. Specifically, in the invention, the X-axis driving piece 3 is mainly used for driving the lens 8 to be turned up and down, the Y-axis driving piece 4 is mainly used for driving the lens 8 to rotate in the horizontal direction, and the lens 8 is a coated reflector which can reflect an image more effectively without damaging the definition of the image.

In the present invention, specifically, the Y-axis driving component 4 includes a Y-axis motor set 40, the Y-axis motor set 40 is fixed inside the casing 71, an output end of the Y-axis motor set 40 is connected with a Y power rod, and the Y power rod is fixedly connected with one end of the rotating rod 6. Y power pole and the equal perpendicular to horizontal plane setting of Y axle generator system 40, Y axle motor work, it rotates to drive Y axle power pole 41, dwang 6 drives X axle driving piece 3 simultaneously and rotates, in order to realize the rotation of 8 horizontal directions of lens, and 8 centers of lens and projecting apparatus 1 are all on the axis of Y power pole, the accurate projection of the picture that makes 1 throws of projecting apparatus can be on 8 surfaces of lens, Y axle motor drives 8 when rotatory on the horizontal plane of lens, make 8 centers of lens can not take place the skew, guarantee that lens 8 can carry out the picture reflection when turning over of vertical direction.

X axle driving piece 3 includes X axle generator system 30, and X axle generator system 30 output is connected with X power rod, X power rod and 6 other end fixed connection of dwang, X axle generator system 30 with 8 fixed connection of lens. When the X-axis motor set 30 works, the lens 8 can be turned over in the vertical direction by taking the X power rod as a rotation center, so as to change the reflection angle of the lens 8, wherein the X-axis motor set 307 can both drive the lens 8 to be turned over in the vertical direction at every angle of rotation of the Y-axis motor set 40 on the horizontal plane, so that the lens 8 can reflect the projected picture to any position in the space, and thus the picture can be moved in a large scene range.

In the present invention, preferably, the X-axis motor set 30 and the Y-axis motor set 40 both include motors and speed reducers, wherein the motors are ac servomotors, and the ac servomotors have small inertia of the rotor and good dynamic response, and can accurately complete the displacement and rotation angle, thereby avoiding the influence on the picture due to the dynamic shaking caused by inertia. The motor is controlled through the driver, and is used for the one-level subdivision of the rotation step number through the driver, but lens 8 deflects less angle, has further improved the rotation precision of motor, and the effectual rotation angle of adjusting lens 8 improves the rotation precision of lens 8. Therefore, a motor reducer is added at the output end of the driving motor to carry out secondary subdivision on the number of the rotating steps, and finally the motor rotates for one circle, namely 360 degrees, and 25600 subdivisions are realized. The motor rotates a subdivision to drive the mirror surface to move one step, thereby realizing the high-precision control of the motor.

In the present embodiment, it is preferred that,

the working principle is as follows: the method comprises the steps that the video movement path is determined according to video script contents, the position distance of a video needing to move in space is determined through a key frame arranged in the video movement path, the position distance comprises the movement distance and time of two dimensions of an X axis and a Y axis, the movement angle and the movement speed of a motor in the X axis and the movement speed of the motor in the Y axis are obtained through computer calculation and are output to a network control module for signal processing, the network control module feeds two paths of signals back to a motor driver of the X axis and the Y axis, a decoder in the driver reads data into corresponding voltage pulses and outputs the voltage pulses to the motor, each pulse motor rotates one step, the movement speed of the pulse is determined by the frequency peak width of the pulse, and the driver controls an X-axis motor group 30 and a Y-axis motor group 40.

When the Y-axis motor set 40 works, the lens 8 rotates in the horizontal direction by taking the Y power rod as an axis, and when the X-axis motor set 30 works, the lens 8 overturns in the vertical direction by taking the X power rod as a rotation center, so that the reflection angle of the lens 8 is changed. Wherein every time the Y-axis motor unit 40 rotates an angle on the horizontal plane, the X-axis motor unit 30 can drive the lens 8 to turn over in the vertical direction at the angle, so that the lens 8 can reflect the projected picture to the relative position in the space, thereby realizing the movement of the picture in a large scene range.

The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.