CN105700812A - Control method and device for mobile equipment - Google Patents

Abstract

The invention provides a control method and device for mobile equipment. The method comprises the steps that when a terminal detects that a screen of the terminal is pressed by a finger of a user, the initial position of the finger of the user on the screen is recorded; the terminal detects the position of the finger of the user on the screen, and a moving mode and a moving distance of the finger of the user are determined according to the current position of the finger of the user on the screen and the initial position of the finger of the user on the screen; the terminal determines a control mode on the mobile equipment according to the moving mode of the finger of the user; the control amount on the mobile equipment is determined according to the moving distance of the finger of the user; the terminal sends a control command to the mobile equipment according to the determined control mode and the determined control amount. By means of the control method and device for the mobile equipment, the control range on the mobile equipment is widened.

Description

Mobile device control method and device

technical field

The present application relates to the field of data communication, in particular to a control method and device for a mobile device.

Background technique

UAV is an unmanned aircraft operated by wireless remote control equipment and self-contained program control device. The operator controls the UAV by manipulating the wireless remote control device.

The current general practice is to control the drone through the buttons on the remote controller. The disadvantage of this method is that the operation is single, the control is simple, and complex control cannot be performed.

Contents of the invention

Embodiments of the present application provide a control method and device for a mobile device, so as to expand the control range of the mobile device such as a drone, a pan/tilt of the drone, and a camera of the drone.

The technical scheme of the present application is realized like this:

A method for controlling a mobile device, the method comprising:

The terminal detects that the user's finger is pressing the screen of the terminal, and records the initial position of the user's finger on the screen;

The terminal detects the position of the user's finger on the screen, and determines the movement mode and distance of the user's finger according to the current position of the user's finger on the screen and the initial position of the user's finger on the screen;

The terminal determines the control mode of the movable device according to the movement mode of the user's finger; determines the control amount of the movable device according to the movement distance of the user's finger;

The terminal sends a control command to the mobile device according to the determined control mode and control amount.

A control device for a mobile device, the device is located on a terminal, and the device includes:

Touch detection and calculation module: detect the user's finger pressing the screen of the terminal, then record the initial position of the user's finger on the screen, detect the position of the user's finger on the screen, according to the current position of the user's finger on the screen and the position of the user's finger The initial position on the screen, which determines how and how far the user's finger moves;

Control module: determine the control mode for the movable device according to the movement mode of the user's finger determined by the touch detection and calculation module; determine the control amount for the movable device according to the movement distance of the user's finger determined by the touch detection and calculation module; Determine the control method and control amount, and send control commands to the mobile device.

It can be seen that the embodiment of the present application detects the movement mode and distance of the user's finger on the screen through the terminal, and realizes the complex control of the UAV and the pan/tilt and camera of the UAV, and expands the control of the UAV and UAV. The control range of the PTZ and camera.

Description of drawings

FIG. 1 is a flow chart of a control method for a mobile device provided in an embodiment of the present application;

FIG. 2 is a flowchart of a method for controlling a drone by a terminal provided in an embodiment of the present application;

FIG. 3 is a flow chart of a method for controlling the pan/tilt of a drone by a terminal provided in an embodiment of the present application;

FIG. 4 is a flow chart of a method for controlling a camera of a drone by a terminal provided in an embodiment of the present application;

FIG. 5 is a schematic composition diagram of a control apparatus for a mobile device provided by an embodiment of the present application.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 is a flow chart of a control method for a mobile device provided in an embodiment of the present application, and its specific steps are as follows:

Step 101: The terminal detects that the user's finger is pressing the screen of the terminal, and records the initial position of the user's finger on the screen.

Step 102: The terminal detects the position of the user's finger on the screen, and determines the moving mode and moving distance of the user's finger according to the current position of the user's finger on the screen and the initial position of the user's finger on the screen.

Step 103: The terminal determines the control mode for the movable device according to the movement mode of the user's finger; determines the control amount for the movable device according to the movement distance of the user's finger.

Step 104: The terminal sends a control command to the mobile device according to the determined control mode and control amount.

In a preferred embodiment, when the mobile device is a drone, the user's fingers are the user's two fingers;

When the movable device is the gimbal of the drone, the user's finger is the user's single finger.

In a preferred embodiment, when the mobile device is a drone, in step 102, determining the moving distance of the user's finger includes:

The terminal calculates the movement distance of each finger of the user according to the current position and the initial position of each finger of the user on the screen, and then uses the smaller movement distance of the two fingers as the movement distance of the user's two fingers.

In a preferred embodiment, when the movable device is an unmanned aerial vehicle, in step 103, according to the movement mode of the user's finger, determining the control mode for the unmanned aerial vehicle includes:

When the user moves two fingers upwards, determine the control method for the drone as follows: control the drone to rise;

Or/and, when the user moves two fingers down, determine the control method for the drone as: control the drone to descend;

Or/and, when the user moves two fingers to the left, determine the control method for the drone as: control the drone to fly to the left;

Or/and, when the user moves two fingers to the right, determine the control method for the drone as: control the drone to fly to the right;

Or/and, when the user pinches two fingers together, determine the control method for the drone as: control the drone to move backward;

Or/and, when the user separates the two fingers, it is determined that the control method for the drone is: control the drone to move forward.

In a preferred embodiment, when the mobile device is an unmanned aerial vehicle, the movement modes of the user's two fingers are divided into three sets in advance: the first set is moving up and down; the second set is: moving left and Move right, the third set is closing and separating;

In step 102, determining the movement mode of the user's finger includes:

The terminal confirms that this movement is the second and subsequent valid movement between the time the user presses the screen of the terminal with two fingers and the time before the user lifts the two fingers on the screen of the terminal, and then compares this movement with the latest Whether the valid movement modes belong to the same set, if so, determine that the movement is valid, record the movement mode, and proceed to step 103; otherwise, determine that the movement is invalid, and ignore the movement.

In a preferred embodiment, when the movable device is a pan/tilt of an unmanned aerial vehicle, determining the moving distance of the user's finger in step 102 includes:

According to the leftward or rightward movement of the user's finger on the screen, determine the moving distance of the user's finger in the leftward or rightward direction, and at the same time determine the user's fingertip according to the upward or downward movement of the user's finger on the screen The distance to move in the up or down direction.

In a preferred embodiment, when the mobile device is a pan/tilt of a drone, in step 101, the terminal recording the initial position of the user's finger on the screen further includes:

The terminal takes the initial position of the user's finger on the screen as the center of the circle, and draws a circle on the screen with the preset radius as the radius;

In step 102, determining the moving distance of the user's finger includes:

When the moving distance of the user's finger in a direction is greater than the radius of the circle, the moving distance of the user's finger in this direction is forced to be the radius of the circle.

In a preferred embodiment, in step 103, determining the amount of control on the movable device according to the moving distance of the user's finger includes:

A proportional value is obtained by dividing the moving distance of the user's finger by the preset proportional threshold, and then the proportional value is multiplied by the preset maximum control amount to obtain the control amount for the movable device.

In a preferred embodiment, in step 102, determining the moving distance of the user's finger includes:

If the terminal finds that the movement distance of the user's finger is less than the preset minimum movement distance, it considers that the movement of the user's finger is invalid.

In a preferred embodiment, when the movable device is a drone, the terminal detects that the user lifts up two fingers, and then sends a hovering command to the drone.

In a preferred embodiment, when the movable device is a pan/tilt of an unmanned aerial vehicle, when the terminal detects that the user lifts up a single finger, it sends a stationary command to the pan/tilt.

Fig. 2 is the flow chart of the method for terminal control UAV provided by the embodiment of the present application, and its specific steps are as follows:

Step 201: The terminal detects that the user presses the screen of the terminal with two fingers, and records the initial position of the user's two fingers on the screen.

Step 202: The terminal periodically detects the position of the user's two fingers on the screen, and determines the movement method and distance of the user's two fingers based on the current position of the user's two fingers on the screen and the initial position of the user's two fingers on the screen.

Specifically, the terminal has a default pixel coordinate system. The origin of the coordinate system is the pixel point in the upper left corner of the screen. The horizontal direction of the coordinate system is the width direction of the terminal, and the right direction is the horizontal positive direction. The vertical direction of is the height direction of the terminal, and the downward direction is the vertical positive direction.

The user can set an angle range on the terminal for upward movement, downward movement, leftward movement, rightward movement, two-finger close-up, and two-finger separation, so as to determine the movement mode of the user's two fingers. Example settings:

1) When the included angle between the moving direction of the user's two fingers and the vertical negative direction of the pixel coordinate system is within [-a°, a°], it is determined that the user's two fingers move upward;

Wherein, a can be determined empirically, for example, is 30; in addition, the moving direction of each finger of the user can be calculated according to the current coordinates of the user's finger on the screen and the initial coordinates of the user's finger on the screen.

2) When the angle between the moving direction of the user's two fingers and the vertical positive direction of the pixel coordinate system is within [-a°, a°], it is determined that the user's two fingers are moving downward;

3) When the angle between the moving direction of the user's two fingers and the horizontal negative direction of the pixel coordinate system is within [-b°, b°], it is determined that the user's two fingers move to the left;

Wherein, b can be determined empirically, for example, it is 30.

4) When the angle between the moving direction of the user's two fingers and the horizontal positive direction of the pixel coordinate system is within [-b°, b°], it is determined that the user's two fingers move to the right;

5) When the angle between the moving direction of the user's left finger and the horizontal positive direction of the pixel coordinate system is within [-c°, c°], and the angle between the moving direction of the user's right finger and the horizontal negative direction of the pixel coordinate system is within When it is within [-c°, c°], it is determined that the user pinches two fingers together;

Wherein, c can be determined empirically, for example, it is 30.

6) When the angle between the moving direction of the user's left finger and the horizontal negative direction of the pixel coordinate system is within [-c°, c°], and the angle between the moving direction of the user's right finger and the horizontal positive direction of the pixel coordinate system is within When it is within [-c°, c°], it is determined that the user's two fingers are separated.

The calculation process of the moving distance of the user's two fingers is as follows:

Calculate the movement distance of each finger of the user according to the current coordinates and initial coordinates of each finger on the screen respectively, and then use the smaller movement distance of the two fingers as the movement distance of the user's two fingers.

Preferably, if the terminal finds that the movement distance of the user's two fingers is less than the preset minimum movement distance, it considers that the movement of the user's two fingers is invalid.

Step 203: The terminal determines the control mode of the drone according to the movement mode of the user's two fingers; determines the control amount of the drone according to the movement distance of the user's two fingers.

specifically:

1) When the user moves up with two fingers, determine the control method for the UAV: control the UAV to rise;

2) When the user's two fingers move down, determine the control method for the UAV: control the UAV to descend;

3) When the user moves two fingers to the left, determine the control method for the UAV: control the UAV to fly to the left;

4) When the user moves two fingers to the right, determine the control method for the UAV: control the UAV to fly to the right;

5) When the user pinches two fingers together, the control method for the drone is determined as: control the drone to retreat;

6) When the user separates the two fingers, determine the control method for the UAV: control the UAV to move forward.

According to the moving distance of the user's two fingers, the specific process of determining the control amount of the drone is as follows:

Divide the moving distance of the user's two fingers by the preset proportional threshold to obtain a proportional value, and then multiply the proportional value by the preset maximum control amount to obtain the control amount of the drone, which is usually the speed.

Among them, when the user's two fingers move up and down, the corresponding ratio thresholds are the same, which can be the screen height of the terminal or other values set; The ratio threshold of , which can be the screen width of the terminal or other set values, is the same.

Step 204: The terminal sends a control command to the UAV according to the determined control method and control amount.

Preferably, when the terminal detects that the user's two fingers are lifted, a hovering command is sent to the drone.

Preferably, the movement modes of the user's two fingers are divided into three sets in advance: the first set is moving up and down; the second set is: moving left and right; the third set is closing and separating. In step 202 , when the terminal determines the movement mode of the user's two fingers, if it is confirmed that this movement is the second and subsequent effective movements between the time the user presses the two fingers on the screen and the time before the user lifts the two fingers on the screen, then compare this time Whether the movement method and the last valid movement method recorded belong to the same set. If so, determine that the movement is valid, record the movement method, and continue to execute the follow-up process; otherwise, determine that the movement is invalid and ignore the movement. And, when the user lifts two fingers on the screen, delete all valid movement modes of the user's fingers that have been recorded.

That is to say, when the user presses two fingers on the screen and lifts them up, if the first movement is up or down, then only the up or down movement will be valid, and all other movements will be invalid. ;

When the user presses two fingers on the screen and lifts it up, if the first movement is to move left or right, then only the left or right movement is a valid movement, and other movements are invalid movements;

When the user presses two fingers on the screen and lifts them up, if the first movement method is to close or separate, then only close or separate is a valid movement, and other movements are invalid;

When the terminal detects that the user's two fingers are pressed on the screen and the user's two fingers are lifted on the screen, there is a round of control process; when the user's two fingers are pressed again on the screen, a new round of control begins.

Fig. 3 is the flow chart of the method for the terminal to control the pan/tilt of the unmanned aerial vehicle provided by the embodiment of the present application, and its specific steps are as follows:

Step 301: The terminal detects that the user presses the screen of the terminal with a single finger, and records the initial position of the user's finger on the screen.

Step 302: The terminal draws a circle on the screen with the initial position of the user's finger on the screen as the center and with a preset radius as the radius.

Step 303: The terminal periodically detects the position of the user's finger on the screen, and calculates the moving direction and moving distance of the user's finger on the screen according to the current position and the initial position of the user's finger on the screen.

It should be noted that, unlike controlling a drone that can only be controlled in one direction, when controlling the gimbal, you can not only control the gimbal to move in one direction, but also control the gimbal to move in two directions at the same time, for example: up left, down left, Move up and down right.

When calculating the movement direction and distance of the user's finger on the screen, the movement distance of the user's finger in the horizontal direction can be determined according to the movement of the user's finger in the horizontal direction (to the left or right) on the screen, and at the same time according to the movement distance of the user's finger on the screen. The movement in the vertical direction (up or down) on the screen determines the moving distance of the user's finger in the vertical direction.

Preferably, when the moving distance of the user's finger in the horizontal direction and the vertical direction is greater than the radius of the circle, the moving distance of the user's finger in the horizontal direction and the vertical direction is forced to be the radius of the circle.

Step 304: The terminal determines the direction of controlling the pan/tilt of the drone according to the moving direction of the user's finger on the screen; determines the control amount of the pan/tilt of the drone according to the moving distance of the user's finger on the screen.

Specifically, when determining the control amount of the gimbal of the drone according to the moving distance of the user's finger on the screen, if the user's finger moves in two directions, then for the moving distance in each direction, Calculate the amount of control for the drone in each direction.

Specifically, the moving distance of the user's finger in a certain direction is divided by a preset ratio threshold value to obtain a ratio value, and the ratio value is multiplied by a preset maximum control amount to obtain the control amount of the pan/tilt in this direction. Wherein, the preset ratio threshold may be a radius of a circle.

The controlled quantity is usually speed.

Preferably, when the moving distance of the user's finger is less than the preset minimum moving distance, the current movement of the user's finger is considered invalid.

Step 305: The terminal sends a control command to the pan-tilt according to the determined control direction and control amount of the pan-tilt.

Specifically, when the user's finger moves in two directions, it is necessary to simultaneously carry the control values for the two directions in the control command.

Preferably, when the user lifts the finger, a static command is sent to the pan/tilt to command the pan/tilt to stop at the current position.

FIG. 4 is a flowchart of a method for controlling a camera of a drone by a terminal provided in an embodiment of the present application, and the specific steps are as follows:

Step 401: The terminal detects that the user's finger clicks on the camera application of the terminal, and opens the camera interface.

Step 402: The terminal detects that the user's finger clicks the camera interface button, and then sends a camera command to the camera of the drone.

Step 403: The terminal detects that the user's finger clicks the switch working mode button on the camera interface, and confirms that the user wants to switch to the video mode, then sends a command to enter the video mode to the camera of the drone; when it detects that the user's finger clicks to start recording button, send a command to start recording video to the camera of the drone, and change the start recording button to a stop recording button at the same time; when it is detected that the user's finger clicks the stop recording button, a command to stop recording video is sent to the camera of the drone.

The switch working mode button defaults to photo mode, which can be switched between photo mode and video mode.

Preferably, after the terminal sends a photographing command to the camera of the drone, it may display "photographing" to the user when receiving a response from the camera, and may display "photographing" to the user when receiving a notification of the end of photographing from the camera. The end of taking pictures"; similarly, after sending the command to start recording video to the camera, when receiving the response returned by the camera, it can display "recording video" to the user, after sending the command to stop recording video to the camera, after receiving the camera When a response is returned, "recording ended" can be displayed to the user.

Preferably, when the remote control is used to control the camera of the drone, when the camera receives a control command from the remote control, the control command will be synchronized to the terminal for display. For example: when the camera receives the start video recording command from the remote control, it will send a video recording start notification to the terminal. When a command to stop video recording comes, a notification of the end of video recording will be sent to the terminal. When the terminal receives the notification, it will display "recording ended" to the user on the screen.

Preferably, when the terminal detects that the user has set the camera parameters, it sends the camera parameters in the setting command to the camera, and after receiving the setting success or failure indication returned by the camera, displays "setting success or failure" to the user.

The terminal in the embodiment of the present application is any terminal with a touch screen, including: PC, handheld terminal, etc., such as a mobile phone.

Fig. 5 is a schematic diagram of the composition of the mobile device control device provided by the embodiment of the present application. The device is located on the terminal, and the device mainly includes: a touch detection and calculation module and a control module, wherein:

Touch detection and calculation module: detect the user's finger pressing the screen of the terminal, then record the initial position of the user's finger on the screen, detect the position of the user's finger on the screen, according to the current position of the user's finger on the screen and the position of the user's finger The initial position on the screen, which determines how and how far the user's finger moves.

Control module: determine the control mode for the movable device according to the movement mode of the user's finger determined by the touch detection and calculation module; determine the control amount for the movable device according to the movement distance of the user's finger determined by the touch detection and calculation module; Determine the control method and control amount, and send control commands to the mobile device.

In a preferred embodiment, when the mobile device is a drone, the user's finger detected by the touch detection and calculation module is the user's two fingers;

When the movable device is the pan/tilt of the drone, the user's finger detected by the touch detection and calculation module is the user's single finger.

In a preferred embodiment, when the mobile device is a drone,

The touch detection and calculation module determines the moving distance of the user's finger including:

Calculate the moving distance of each finger of the user according to the current position and the initial position of each finger on the screen, and then use the smaller moving distance of the two fingers as the moving distance of the user's two fingers.

In a preferred embodiment, when the mobile device is an unmanned aerial vehicle,

The control module determines the control mode of the drone according to the movement mode of the user's finger determined by the touch detection and calculation module, including:

When the user moves two fingers upwards, determine the control method for the drone as follows: control the drone to rise;

Or/and, when the user moves two fingers down, determine the control method for the drone as: control the drone to descend;

Or/and, when the user moves two fingers to the left, determine the control method for the drone as: control the drone to fly to the left;

Or/and, when the user moves two fingers to the right, determine the control method for the drone as: control the drone to fly to the right;

Or/and, when the user pinches two fingers together, determine the control method for the drone as: control the drone to move backward;

Or/and, when the user separates the two fingers, it is determined that the control method for the drone is: control the drone to move forward.

In a preferred embodiment, when the mobile device is a drone,

The touch detection and calculation module pre-saves three sets divided by the user for the movement of the user's two fingers: the first set is moving up and down; the second set is: moving left and right; the third set is closing and separating ;

The touch detection and calculation module determines the movement mode of the user's finger including:

After confirming that this movement is the second and subsequent effective movement between the user holding down the screen of the terminal with two fingers and before lifting the user's two fingers on the screen of the terminal, compare this movement method with the latest effective movement. Whether the movement methods belong to the same set, if so, determine that this movement is valid, and record this movement method; otherwise, determine that this movement is invalid.

In a preferred embodiment, when the mobile device is a pan/tilt of an unmanned aerial vehicle, the touch detection and calculation module determines the movement distance of the user's finger including:

According to the leftward or rightward movement of the user's finger on the screen, determine the moving distance of the user's finger in the leftward or rightward direction, and at the same time determine the user's fingertip according to the upward or downward movement of the user's finger on the screen The distance to move in the up or down direction.

In a preferred embodiment, recording the initial position of the user's finger on the screen by the touch detection and calculation module further includes:

Draw a circle on the screen with the initial position of the user's finger on the screen as the center and the preset radius as the radius;

The touch detection and calculation module determines the moving distance of the user's finger including:

When the moving distance of the user's finger in a direction is greater than the radius of the circle, the moving distance of the user's finger in this direction is forced to be the radius of the circle.

In a preferred embodiment, the control module determines the amount of control on the movable device according to the movement distance of the user's finger determined by the touch detection and calculation module:

A proportional value is obtained by dividing the moving distance of the user's finger by the preset proportional threshold, and then the proportional value is multiplied by the preset maximum control amount to obtain the control amount for the movable device.

In a preferred embodiment, the control module is further used to:

When it is detected that the user's finger clicks on the camera application of the terminal, the camera interface is opened;

Detect that the user's finger clicks the photo button on the camera interface, and then send a photo command to the drone's camera;

When it is detected that the user's finger clicks the switch working mode button on the camera interface, and it is confirmed that the user wants to switch to the video mode, a command to enter the video mode is sent to the camera of the drone; when it is detected that the user's finger clicks the start recording button, the The drone's camera sends a command to start recording video, and at the same time changes the start recording button to a stop recording button; when it is detected that the user's finger clicks the stop recording button, a command to stop recording video is sent to the drone's camera.

In a preferred embodiment, the control module is further configured to receive a control command for the camera from a remote controller sent by the camera of the drone, and display the control command to the user.

The above is only a preferred embodiment of the application, and is not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application should be included in the application. within the scope of protection.

Claims (20)

1. A control method for a movable device, characterized in that the method comprises: The terminal detects that the user's finger is pressing the screen of the terminal, and records the initial position of the user's finger on the screen; The terminal detects the position of the user's finger on the screen, and determines the movement mode and distance of the user's finger according to the current position of the user's finger on the screen and the initial position of the user's finger on the screen; The terminal determines the control mode of the movable device according to the movement mode of the user's finger; determines the control amount of the movable device according to the movement distance of the user's finger; The terminal sends a control command to the mobile device according to the determined control mode and control amount. 2. The method according to claim 1, wherein when the movable device is a drone, the user's fingers are the user's two fingers; When the movable device is a pan-tilt of an unmanned aerial vehicle, the user's finger is a user's single finger. 3. The method according to claim 2, wherein when the movable device is an unmanned aerial vehicle, The determination of the moving distance of the user's finger includes: The terminal calculates the movement distance of each finger of the user according to the current position and the initial position of each finger of the user on the screen, and then uses the smaller movement distance of the two fingers as the movement distance of the user's two fingers. 4. The method according to claim 1, wherein when the movable device is an unmanned aerial vehicle, According to the movement mode of the user's finger, the terminal determines the control mode of the drone including: When the user moves two fingers upwards, determine the control method for the drone as follows: control the drone to rise; Or/and, when the user moves two fingers down, determine the control method for the drone as: control the drone to descend; Or/and, when the user moves two fingers to the left, determine the control method for the drone as: control the drone to fly to the left; Or/and, when the user moves two fingers to the right, determine the control method for the drone as: control the drone to fly to the right; Or/and, when the user pinches two fingers together, determine the control method for the drone as: control the drone to move backward; Or/and, when the user separates the two fingers, it is determined that the control method for the drone is: control the drone to move forward. 5. The method according to claim 1, wherein when the movable device is an unmanned aerial vehicle, Divide the movement methods of the user's two fingers into three sets in advance: the first set is moving up and down; the second set is: moving left and right; the third set is closing and separating; The method of determining the movement of the user's finger includes: The terminal confirms that this movement is the second and subsequent valid movement between the time the user presses the screen of the terminal with two fingers and the time before the user lifts the two fingers on the screen of the terminal, and then compares this movement with the latest Whether the valid movement methods belong to the same set, if so, determine that this movement is valid, and record this movement method; otherwise, determine that this movement is invalid. 6. The method according to claim 1, wherein when the movable device is a pan/tilt of an unmanned aerial vehicle, determining the moving distance of the user's finger comprises: According to the leftward or rightward movement of the user's finger on the screen, determine the moving distance of the user's finger in the leftward or rightward direction, and at the same time determine the user's fingertip according to the upward or downward movement of the user's finger on the screen The distance to move in the up or down direction. 7. The method according to claim 6, wherein the recording the initial position of the user's finger on the screen further comprises: The terminal takes the initial position of the user's finger on the screen as the center of the circle, and draws a circle on the screen with the preset radius as the radius; The determination of the moving distance of the user's finger includes: When the moving distance of the user's finger in a direction is greater than the radius of the circle, the moving distance of the user's finger in this direction is forced to be the radius of the circle. 8. The method according to claim 1, wherein said determining the amount of control on the movable device according to the moving distance of the user's finger comprises: A proportional value is obtained by dividing the moving distance of the user's finger by the preset proportional threshold, and then the proportional value is multiplied by the preset maximum control amount to obtain the control amount for the movable device. 9. The method of claim 1, further comprising: The terminal detects that the user's finger clicks on the camera application of the terminal, and then opens the camera interface; The terminal detects that the user's finger clicks the photo button on the camera interface, and then sends a photo command to the drone's camera; The terminal detects that the user's finger clicks the switch working mode button on the camera interface, and confirms that the user wants to switch to the video mode, then sends a command to enter the video mode to the camera of the drone; when it detects that the user's finger clicks the start recording button, then Send the start recording video command to the camera of the drone, and change the start recording button into a stop recording button at the same time; when it is detected that the user's finger clicks the stop recording button, send the stop recording video command to the drone's camera. 10. The method of claim 9, further comprising: The terminal receives the control command of the camera from the remote controller sent by the camera of the drone, and displays the control command to the user. 11. A control device for a mobile device, the device is located on a terminal, characterized in that the device includes: Touch detection and calculation module: detect the user's finger pressing the screen of the terminal, then record the initial position of the user's finger on the screen, detect the position of the user's finger on the screen, according to the current position of the user's finger on the screen and the position of the user's finger The initial position on the screen, which determines how and how far the user's finger moves; Control module: determine the control mode for the movable device according to the movement mode of the user's finger determined by the touch detection and calculation module; determine the control amount for the movable device according to the movement distance of the user's finger determined by the touch detection and calculation module; Determine the control method and control amount, and send control commands to the mobile device. 12. The device according to claim 11, wherein when the movable device is a drone, the user's finger detected by the touch detection and calculation module is the user's two fingers; When the movable device is a pan/tilt of an unmanned aerial vehicle, the user's finger detected by the touch detection and calculation module is a user's single finger. 13. The device according to claim 12, wherein when the movable device is a drone, The touch detection and calculation module determines the movement distance of the user's finger including: Calculate the moving distance of each finger of the user according to the current position and the initial position of each finger on the screen, and then use the smaller moving distance of the two fingers as the moving distance of the user's two fingers. 14. The device according to claim 11, wherein when the movable device is a drone, The control module determines the control mode of the drone according to the movement mode of the user's finger determined by the touch detection and calculation module: When the user moves two fingers upwards, determine the control method for the drone as follows: control the drone to rise; Or/and, when the user moves two fingers down, determine the control method for the drone as: control the drone to descend; Or/and, when the user moves two fingers to the left, determine the control method for the drone as: control the drone to fly to the left; Or/and, when the user moves two fingers to the right, determine the control method for the drone as: control the drone to fly to the right; Or/and, when the user pinches two fingers together, determine the control method for the drone as: control the drone to move backward; Or/and, when the user separates the two fingers, it is determined that the control method for the drone is: control the drone to move forward. 15. The device according to claim 11, wherein when the movable device is a drone, The touch detection and calculation module pre-saves three sets divided by the user for the movement of the user's two fingers: the first set is moving up and down; the second set is: moving left and right, and the third set is closing and separation; The touch detection and calculation module determines that the movement mode of the user's finger includes: After confirming that this movement is the second and subsequent effective movement between the user holding down the screen of the terminal with two fingers and before lifting the user's two fingers on the screen of the terminal, compare this movement method with the latest effective movement. Whether the movement methods belong to the same set, if so, determine that this movement is valid, and record this movement method; otherwise, determine that this movement is invalid. 16. The device according to claim 11, wherein when the movable device is a pan/tilt of an unmanned aerial vehicle, determining the movement distance of the user's finger by the touch detection and calculation module includes: According to the leftward or rightward movement of the user's finger on the screen, determine the moving distance of the user's finger in the leftward or rightward direction, and at the same time determine the user's fingertip according to the upward or downward movement of the user's finger on the screen The distance to move in the up or down direction. 17. The device according to claim 16, wherein the recording of the initial position of the user's finger on the screen by the touch detection and calculation module further comprises: Draw a circle on the screen with the initial position of the user's finger on the screen as the center and the preset radius as the radius; The touch detection and calculation module determines the movement distance of the user's finger including: When the moving distance of the user's finger in a direction is greater than the radius of the circle, the moving distance of the user's finger in this direction is forced to be the radius of the circle. 18. The device according to claim 11, wherein the control module determines the amount of control on the movable device according to the movement distance of the user's finger determined by the touch detection and calculation module: A proportional value is obtained by dividing the moving distance of the user's finger by the preset proportional threshold, and then the proportional value is multiplied by the preset maximum control amount to obtain the control amount for the movable device. 19. The device according to claim 11, wherein the control module is further used for: When it is detected that the user's finger clicks on the camera application of the terminal, the camera interface is opened; Detect that the user's finger clicks the photo button on the camera interface, and then send a photo command to the drone's camera; When it is detected that the user's finger clicks the switch working mode button on the camera interface, and it is confirmed that the user wants to switch to the video mode, a command to enter the video mode is sent to the camera of the drone; when it is detected that the user's finger clicks the start recording button, the The drone's camera sends a command to start recording video, and at the same time changes the start recording button to a stop recording button; when it is detected that the user's finger clicks the stop recording button, a command to stop recording video is sent to the drone's camera. 20. The device according to claim 19, wherein the control module is further configured to receive a control command for the camera from a remote controller sent by the camera of the drone, and display the control command to the user.