Ball serving wheel rotating speed detection control structure

Abstract

The utility model discloses a ball serving wheel rotating speed detection control structure which comprises a ball serving disc, a rotating speed sensor is fixedly installed in the middle of the front face of the ball serving disc, sensing heads are arranged on the two sides of the rotating speed sensor, ball serving motors are fixedly installed on the two sides of the back face of the ball serving disc, and ball serving wheels are fixedly installed on output shafts of the ball serving motors. According to the utility model, during actual use, the rotating speed of the serving wheels of the serving machine can be measured, so that the rotating speed data of the serving wheels can be determined; the tennis serving speed can be controlled by controlling the rotating speed of the serving motor by transmitting and processing data, so that the actual use effect of dynamically controlling the tennis serving speed is achieved, the use limitation is reduced, the comprehensive control quality of the tennis serving machine is improved, and the rotating speed sensing and detecting structure is simple and convenient to operate. Installation is convenient, manufacturing difficulty is small, maintenance cost is low, and application and popularization are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of tennis ball-serving machines, in particular to a ball-serving wheel rotation speed detection and control structure. Background Art

[0002] Tennis is a ball sport. The court is a rectangle, 23.77 meters long, 8.23 ​​meters wide for singles, and 10.97 meters wide for doubles. A net is placed in the middle, with each team occupying one side of the court. Players use tennis rackets to hit the ball, and tennis ball machines are often used during tennis activities.

[0003] The tennis ball machine is mainly used for tennis. The relative rotation of two wheels squeezes the tennis ball to hit it. This design enables the tennis ball machine to efficiently provide training balls, suitable for professional training and family entertainment.

[0004] When using a traditional tennis serving machine, it is inconvenient to detect the rotation speed of the serving wheel. Since the speed of the serving machine is closely related to the rotation speed of the serving wheel, when the rotation speed information cannot be obtained, it is inconvenient to control the speed of the serving machine. Therefore, it has certain limitations in use. For this reason, the utility model proposes a serving wheel rotation speed detection control structure. Utility Model Content

[0005] The purpose of the present invention is to provide a ball-driving wheel speed detection and control structure to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a serving wheel speed detection and control structure, including a serving plate, a speed sensor is fixedly installed in the middle position of the front of the serving plate, and sensing heads are provided on both sides of the speed sensor. A serving motor is fixedly installed on both sides of the back of the serving plate, a serving wheel is fixedly installed on the output shaft of the serving motor, and magnet sheets are fixedly installed on the inner and outer walls of the two serving wheels.

[0007] Preferably, the rotation speed sensor is a Hall sensor.

[0008] Preferably, a bearing is installed at the center of the serving plate.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The utility model can measure the rotation speed of the serving wheel of the tennis ball machine during actual use, thereby determining the rotation speed data of the serving wheel. By transmitting and processing the data, the speed of the tennis ball when being served can be controlled by controlling the rotation speed of the serving motor, thereby having the practical effect of dynamically controlling the speed of the tennis ball being served, reducing the limitation of use, and improving the comprehensive control quality of the tennis ball machine. In addition, the rotation speed sensor detection structure of the utility model is simple, easy to install, has low manufacturing difficulty, and has low maintenance cost, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the front three-dimensional structure of the serving plate according to an embodiment of the utility model;

[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the back of the serving plate according to an embodiment of the present utility model;

[0013] Figure 3 This is a schematic diagram of the overall structure of the speed sensor according to an embodiment of the present utility model;

[0014] Figure 4 This is a schematic diagram of the inner structure of the serving wheel according to an embodiment of the present utility model.

[0015] In the picture: 1. Serving plate; 2. Speed ​​sensor; 3. Sensor head; 4. Serving motor; 5. Serving wheel; 6. Magnet. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0019] See also Figure 1-4 The present invention provides an embodiment of a ball-serving wheel speed detection and control structure, comprising a ball-serving plate 1, with ball-serving motors 4 fixedly mounted on both sides of the back of the ball-serving plate 1, a ball-serving wheel 5 fixedly mounted on the output shaft of the ball-serving motor 4, and magnets 6 fixedly mounted on the inner and outer walls of the two ball-serving wheels 5;

[0020] In this structural design, the two ball-serving motors 4 can drive the two ball-serving wheels 5 to rotate. When the ball-serving wheels 5 rotate, they will synchronously drive the inner magnet pieces 6 to rotate.

[0021] In order to detect the rotation speed of the serving wheel 5, a rotation speed sensor 2 is fixedly installed in the middle of the front of the serving plate 1. The rotation speed sensor 2 is a Hall sensor, and a sensing head 3 is provided on both sides of the rotation speed sensor 2;

[0022] Hall effect sensors are mature existing technology products. They are magnetic field sensors made based on the Hall effect. The Hall effect is a type of magnetoelectric effect that converts a changing magnetic field into a change in output voltage. Hall effect sensors can measure physical quantities that generate and affect magnetic fields. For example, they are used in proximity switches, position measurement, speed measurement, etc.

[0023] When the sensor is used in the present invention, when the ball-serving wheel 5 rotates, the magnet piece 6 also rotates, changing the magnetic field distribution around the magnet. The Hall sensor of the present invention can sense the change in the magnetic field, and thus measure the rotation speed of the ball-serving wheel 5 according to the change in the magnetic field, thereby achieving the practical effect of rotation speed measurement.

[0024] In this embodiment, in order to facilitate the connection of the serving plate 1 to the external connecting rod driving structure, a bearing is installed at the center of the serving plate 1.

[0025] Working principle: When the utility model is actually used, the serving plate 1 of the utility model can be connected to the external connecting rod driving structure through the bearing and the rotating shaft, so that it can be installed on the serving machine for use;

[0026] The utility model is provided with two ball-serving motors 4 to drive two ball-serving wheels 5 to rotate. When the ball-serving wheels 5 rotate, the two ball-serving wheels 5 rotate and squeeze the tennis ball between them, thereby sending the tennis ball out and ensuring the normal serving effect.

[0027] When the ball-serving wheel 5 rotates, it will synchronously drive the inner magnet piece 6 to rotate. The utility model is provided with a speed sensor 2, which is a Hall sensor. When the ball-serving wheel 5 rotates, the magnet piece 6 also rotates, changing the magnetic field distribution around the magnet. The Hall sensor of the utility model can sense the change in the magnetic field, and thus measure the speed of the ball-serving wheel 5 according to the change in the magnetic field, thereby achieving the practical effect of speed measurement.

[0028] By detecting the rotation speed of the serving wheel 5, the speed of the tennis ball can be understood through the conversion relationship. When the utility model is installed on the serving machine for use, the Hall sensor can be connected to the data processing control chip of the serving machine, so that the measured rotation speed data is transmitted to the data processing control chip through the Hall sensor, and the rotation speed of the two serving motors 4 can be controlled by the data processing control chip, so that the speed of the tennis ball can be intelligently controlled, which has the practical effect of measuring and controlling the rotation speed of the serving wheel 5.

[0029] According to the above description, the present invention can measure the rotation speed of the serving wheel of the tennis ball machine during actual use, thereby determining the rotation speed data of the serving wheel. By transmitting and processing the data, the speed of the tennis ball when being served can be controlled by controlling the rotation speed of the serving motor, thereby having the actual use effect of dynamically controlling the speed of the tennis ball, reducing the limitations of use, and improving the comprehensive control quality of the tennis ball machine. In addition, the rotation speed sensor detection structure of the present invention is simple, easy to install, has low manufacturing difficulty, and has low maintenance cost, and is suitable for popularization and use.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A ball-serving wheel speed detection and control structure, comprising a ball-serving wheel (1), characterized in that: A rotation speed sensor (2) is fixedly mounted at the middle position of the front of the serving plate (1), and sensing heads (3) are provided on both sides of the rotation speed sensor (2). A serving motor (4) is fixedly mounted on both sides of the back of the serving plate (1), and a serving wheel (5) is fixedly mounted on the output shaft of the serving motor (4). Magnet pieces (6) are fixedly mounted on the inner and outer walls of the two serving wheels (5).

2. The serving wheel speed detection control structure according to claim 1, characterized in that: The rotation speed sensor (2) is a Hall sensor.

3. The serving wheel speed detection control structure according to claim 1, characterized in that: A bearing is installed at the center of the serving plate (1).

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