Displacement control device of sighting target screen for visual training

Abstract

The utility model discloses a displacement control device of a sighting target screen for visual training. Comprising a bottom plate; the display is longitudinally and movably arranged on the bottom plate through a sliding device; the motor is vertically and downwards arranged in the center of the rear edge of the bottom plate; the driving wheel is connected with an output shaft of the motor through a wheel shaft; the driven wheel is rotatably arranged at the center of the front edge of the bottom plate; the belt is arranged on the driving wheel and the driven wheel in a sleeving manner; the belt fixing clamp is fixedly arranged on the belt and is connected with the display; the magnet is eccentrically arranged at the lower end of the wheel shaft; the magnetic induction circuit board is arranged below the bottom plate and is opposite to the position of the magnet; the control panel is arranged on one side of the bottom plate and electrically connected with the motor and the magnetic induction circuit board. The stepping motor has the beneficial effects that the magnetic induction circuit board is arranged, whether the motor is out of step or not can be judged by detecting the magnetic flux change of the magnet, and displacement compensation is carried out after the motor is out of step.

Description

Technical Field

[0001] The utility model relates to the technical field of displacement compensation, in particular to a displacement control device for a sight mark screen for visual training. Background Art

[0002] When a user needs to adjust the sight mark screen to the target position, the main control board receives the information and issues a control command. The stepper motor receives the pulse signal from the main control board and starts to rotate, driving the belt to move the sight mark screen to the target position. The main control board can only send control commands based on the needs, but it is unknown whether the stepper motor will execute or execute accurately.

[0003] The rotor of the stepper motor actually has magnets with alternating N and S poles inside the stepper motor. When the rotating magnetic field generated by the current on the coil around the rotor switches according to a certain rule, the rotor will rotate to a corresponding angle. When the magnetic field rotates too fast, the moment of inertia of the load on the rotor is too large, or the friction of the load on the rotor suddenly increases due to environmental factors, the magnetic field generated by the current cannot attract the rotor to the corresponding angle and lock the rotor, causing the rotor to be unable to keep up, which will cause a loss of step. The faster the stepper motor runs, the smaller the torque it can output, otherwise it will cause a loss of step. Moreover, the loss of step of the stepper motor is cumulative. If the accurate rotation of the rotor is not intervened, the error of the stepper motor's displacement control of the sight mark screen will gradually increase, and eventually lose control.

[0004] At present, the displacement of the sight mark is mainly driven by a stepper motor to drive the screen forward. Affected by environmental factors, the stepper motor will inevitably have angle errors or lost steps. The sight mark screen has very high requirements for position and needs to provide precise requirements for users. It is impossible to accurately control the displacement of the sight mark screen by relying solely on the open-loop control method of the stepper motor. The existing displacement control technology has a long calibration time, a complex process, poor stability, and errors will also occur in the control process. Therefore, there is an urgent need for a displacement control device for the sight mark screen for visual training. Utility Model Content

[0005] The utility model aims to provide a displacement control device for a sight mark screen for visual training, which is provided with a magnetic induction circuit board and can determine whether a motor is out of step by detecting the change of magnetic flux of a magnet, and perform displacement compensation after the motor is out of step.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions, including:

[0007] Base plate;

[0008] A display, which is longitudinally movably arranged on the bottom plate by a sliding device;

[0009] A motor disposed vertically downwardly at the center of the rear edge of the bottom plate;

[0010] A driving wheel connected to the output shaft of the motor through a wheel axle;

[0011] A driven wheel rotatably disposed at the center of the front edge of the bottom plate;

[0012] A belt, which is sleeved on the driving wheel and the driven wheel, and is used to drive and connect the driven wheel with the driving wheel;

[0013] A belt fixing clip, which is fixed on the belt and connected to the display, and is used to drive the display to move longitudinally;

[0014] a magnet, which is eccentrically disposed at the lower end of the wheel shaft;

[0015] A magnetic induction circuit board, which is arranged below the bottom plate and directly facing the magnet, and is used to detect changes in the magnetic flux of the magnet;

[0016] A control board is arranged on one side of the bottom plate and is electrically connected to the motor and the magnetic induction circuit board respectively, and is used to control the motor.

[0017] Preferably, the sliding device comprises:

[0018] a pair of guide rails, which are longitudinally arranged side by side on the left and right parts of the bottom plate;

[0019] The sliding blocks are respectively arranged on the guide rails in an axially movable manner and connected to the display.

[0020] Preferably, it also includes:

[0021] A bracket, which is arranged below the display and is used to support the display;

[0022] A connecting piece is arranged below the bracket and is respectively connected to the sliding block and the belt fixing clamp.

[0023] Preferably, it also includes:

[0024] A contact switch is arranged at the end of the guide rail and is electrically connected to the motor for controlling the stroke.

[0025] Preferably, it also includes:

[0026] A motor frame is arranged at the center of the rear edge of the base plate and is used to fix the motor on the base plate.

[0027] The beneficial effect of the utility model is that: a magnetic induction circuit board is provided, which can detect the change of magnetic flux of the magnet, thereby judging whether the motor is out of step, and performing displacement compensation after the motor is out of step. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The utility model is a stereoscopic diagram of a displacement control device of a sight mark screen for visual training.

[0029] Figure 2 The utility model is an explosion vision device for a displacement control device of a visual training sight mark screen Figure 1 .

[0030] Figure 3 The utility model is an explosion vision device for a displacement control device of a visual training sight mark screen Figure 2 . DETAILED DESCRIPTION

[0031] The utility model is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it according to the description.

[0032] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or other elements or combinations thereof.

[0033] like Figure 1-3 As shown, the present invention is a displacement control device 1 for a sight mark screen for visual training, comprising:

[0034] The bottom plate 110 is a rectangular plate-shaped structure.

[0035] The display 120 is longitudinally movably arranged on the bottom plate 110 through a sliding device. As a preferred embodiment, the sliding device includes: a pair of guide rails 131 are longitudinally arranged in parallel on the left and right parts of the bottom plate 110; sliders 132 are axially movably arranged on the guide rails 131 and connected to the display 120. As a further preferred embodiment, it also includes: a bracket 121 is arranged below the display 120 for supporting the display 120; a connecting member 122 is arranged below the bracket 121 and is respectively connected to the slider 132 and the belt fixing clip 151.

[0036] The motor 141 is vertically downwardly arranged at the center of the rear edge of the bottom plate 110; the driving wheel 142 is connected to the output shaft of the motor 141 through the wheel shaft 143; the driven wheel 144 is rotatably arranged at the center of the front edge of the bottom plate 110; the belt 145 is sleeved on the driving wheel 142 and the driven wheel 144, and is used to drive the driven wheel 144 to be connected to the driving wheel 142; the belt fixing clamp 146 is fixed on the belt 145 and is connected to the display 120, and is used to drive the display 120 to move longitudinally;

[0037] The magnet 161 is eccentrically arranged at the lower end of the wheel shaft 143; the magnetic induction circuit board 162 is arranged below the base plate 110 and directly opposite to the magnet 161, and is used to detect the change of the magnetic flux of the magnet 161; the control board 170 is arranged on one side of the base plate 110, and is electrically connected to the motor 141 and the magnetic induction circuit board 162 respectively, and is used to control the motor 141.

[0038] During use, the control board 170 sends instructions to the motor 141, so that the motor 141 drives the display 120 to a predetermined position. During this process, the magnetic induction circuit board 162 detects the change in magnetic flux of the magnet 161 and sends the change in magnetic flux to the control board 170. The control board 170 calculates the change in magnetic flux to determine whether there is a loss of step. If so, the control board 170 sends instructions to the motor to perform displacement compensation.

[0039] In another embodiment, the sliding device includes: a pair of guide rails 131 arranged in parallel and longitudinally on the left and right parts of the base plate 110 ; sliders 132 are axially movably arranged on the guide rails 131 and connected to the display 120 .

[0040] In another embodiment, it further includes: a bracket 121 disposed under the display 120 for supporting the display 120; a connecting member 122 disposed under the bracket 121 and connected to the slider 132 and the belt fixing clip 146 respectively.

[0041] In another embodiment, it further includes: a contact switch 180 is disposed at the end of the guide rail 131 and is electrically connected to the motor 141 for controlling the stroke.

[0042] In another embodiment, it further includes: a motor frame 147 disposed at the center of the rear edge of the base plate 110 for fixing the motor 141 on the base plate 110 .

[0043] In summary, the utility model is a displacement control device 1 for a sight mark screen for visual training, which is provided with a magnetic induction circuit board 162, and can determine whether the motor 141 is out of step by detecting the change of the magnetic flux of the magnet 161, and perform displacement compensation after the out of step.

[0044] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A displacement control device for a sight mark screen for visual training, characterized in that: include: Base plate; A display, which is longitudinally movably arranged on the bottom plate by a sliding device; A motor disposed vertically downwardly at the center of the rear edge of the bottom plate; A driving wheel connected to the output shaft of the motor through a wheel axle; A driven wheel rotatably disposed at the center of the front edge of the bottom plate; A belt, which is sleeved on the driving wheel and the driven wheel, and is used to drive and connect the driven wheel with the driving wheel; A belt fixing clip, which is fixed on the belt and connected to the display, and is used to drive the display to move longitudinally; a magnet, which is eccentrically disposed at the lower end of the wheel shaft; A magnetic induction circuit board, which is arranged below the bottom plate and directly facing the magnet, and is used to detect changes in the magnetic flux of the magnet; A control board is arranged on one side of the bottom plate and is electrically connected to the motor and the magnetic induction circuit board respectively, and is used to control the motor.

2. The displacement control device for the sight mark screen for visual training according to claim 1, characterized in that: The sliding device comprises: a pair of guide rails, which are longitudinally arranged side by side on the left and right parts of the bottom plate; The sliding blocks are respectively arranged on the guide rails in an axially movable manner and connected to the display.

3. The displacement control device for the sight mark screen for visual training according to claim 2, characterized in that: Also includes: A bracket, which is arranged below the display and is used to support the display; A connecting piece is arranged below the bracket and is respectively connected to the sliding block and the belt fixing clamp.

4. The displacement control device for the sight mark screen for visual training according to claim 2, characterized in that: Also includes: A contact switch is arranged at the end of the guide rail and is electrically connected to the motor for controlling the stroke.

5. The displacement control device for the sight mark screen for visual training according to claim 1, characterized in that: Also includes: A motor frame is arranged at the center of the rear edge of the base plate and is used to fix the motor on the base plate.

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