Intelligent solid ball throwing tester

Abstract

The utility model relates to an intelligent solid ball throwing tester, which comprises a sand pit, a display panel arranged on one side of the sand pit, two main sliding rods fixed on the inner walls of two mounting racks, two chain wheels arranged below the main sliding rods, a variable-frequency servo motor in butt joint with a wheel shaft of one chain wheel, a chain in meshed connection with the two chain wheels, a mounting seat fixed on the chain, and a rotating shaft connected with the mounting seat, and a main laser sensor is fixed on the mounting seat. According to the utility model, the main laser sensor is driven by the frequency conversion servo motor through the chain and the mounting seat to move, and when the main laser sensor moves along with the mounting seat, laser emitted by the main laser sensor irradiates a solid ball falling on sand; the main laser sensor sends an electric signal to the variable-frequency servo motor and the display panel, the variable-frequency servo motor stops running, the display panel records the number of turns of rotation of the variable-frequency servo motor at the moment, then the throwing distance of the solid ball is measured, and large errors and inconvenience caused by manual measurement are avoided.

Description

Technical Field

[0001] The utility model relates to the field of sports testing equipment, in particular to an intelligent shot-throwing tester. Background Art

[0002] Shot put is a track and field sport, also known as shot put. It is a physical examination item for middle school students entering high school and is taken seriously by students' parents. Whether it is a formal examination or daily training, the existing shot put distance test is usually measured manually, using a tape measure to manually measure the distance of the shot put after throwing. The manual measurement has large errors and is inconvenient, which has a certain impact on the fairness of the examination. To address the fairness issue of manual measurement, there are two methods, one is to use infrared instruments for measurement and the other is an automatic testing scheme, such as the scheme disclosed in the current announcement number CN206239979U, which uses an infrared radiation scheme to measure the distance of the shot put. The principle of this scheme is correct, but the shot put test is usually carried out outdoors in the sand. When the sand is continuously exposed to sunlight, the temperature changes continuously. The sand with constantly changing temperature reflects the infrared rays in the sunlight, and the infrared rays in the sunlight will also interfere with the infrared tester, seriously affecting the test results.

[0003] Therefore, in order to solve the above problems, the applicant needs to design an intelligent shot-throwing tester to solve the problems. Utility Model Content

[0004] The purpose of the utility model is to provide an intelligent shot-throwing tester, which solves the problems mentioned in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides an intelligent shot-throwing tester.

[0006] A sand pool, a display panel is provided on one side of the sand pool, two mounting brackets are provided on one side of the sand pool, two main slide bars are fixed to the inner walls of the two mounting brackets, two sprockets are provided under the main slide bars, and the axle of one of the sprockets is docked with a frequency conversion servo motor, the two sprockets are meshed and connected with chains, a mounting seat is fixed on the chain, the mounting seat is slidably connected to the main slide bar, and a main laser sensor is fixed on the mounting seat;

[0007] A buffer portion is installed on the mounting seat.

[0008] Furthermore, the buffer part includes a slide rail, a slider and a secondary laser sensor, the slide rail is fixed on the mounting seat, the slider is installed on the slide rail, the secondary laser sensor is fixed on the slider, and the main laser sensor and the secondary laser sensor are located at the same height.

[0009] Furthermore, the slide rail is slidably connected to the slider, and the slider is threaded with a screw, and the bottom end of the screw is fitted on the slide rail.

[0010] Furthermore, a push plate is fixed on the mounting seat, and a tooth plate is fixed on the push plate.

[0011] Furthermore, the tooth plate has a pointed appearance at one end close to the main laser sensor, and both ends of the tooth plate are chamfered.

[0012] Furthermore, a scraper is fixed on the mounting seat, and the push plate is located between the main laser sensor and the scraper.

[0013] Furthermore, a secondary slide bar is fixedly connected between the two mounting frames, and the secondary slide bar is slidably connected to the mounting seat.

[0014] Furthermore, the main slide bar and the secondary slide bar are both engraved with scales, and the values of the scales gradually increase from the variable frequency servo motor toward the mounting seat.

[0015] The beneficial effects of the present utility model are:

[0016] 1. The utility model uses a main laser sensor and a variable frequency servo motor to drive the main laser sensor to move through a chain and a mounting base. When the main laser sensor moves with the mounting base, the laser emitted by the main laser sensor illuminates the solid ball falling on the sand. The main laser sensor sends an electrical signal to the variable frequency servo motor and the display panel, and the variable frequency servo motor stops running. The display panel then records the number of rotations of the variable frequency servo motor and then measures the throwing distance of the solid ball, avoiding the large errors and inconvenience of manual measurement.

[0017] 2. The utility model adjusts the distance between the secondary laser sensor and the main laser sensor through the buffer part, and then adjusts the time for the variable frequency servo motor to reduce the speed, so as to avoid the main laser sensor and the solid ball performing photoelectric sensing before the variable frequency servo motor performs stable low rotation, resulting in reduced accuracy.

[0018] 3. The utility model moves with the mounting base via the push plate and the tooth plate. After the test, the tooth plate continuously rotates with the frequency conversion servo motor to approach the starting point. The tooth plate will drive the solid ball that falls on the sand and move it to a place close to the starting point, sending the solid ball to a place close to the starting point, making it convenient for the thrower to conduct the next throwing test. It is very convenient and intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 It is an overall three-dimensional diagram of a preferred embodiment of the utility model;

[0021] Figure 2 This is a three-dimensional diagram of the mounting frame, main slide bar, and sprocket of the preferred embodiment of the utility model;

[0022] Figure 3 This is a three-dimensional diagram of the mounting base and push plate of the preferred embodiment of the utility model;

[0023] Figure 4 This utility model Figure 3 A magnified schematic diagram of point A;

[0024] Figure 5 This is a three-dimensional diagram of the push plate and the tooth plate of the preferred embodiment of the utility model;

[0025] Figure 6 This is a three-dimensional diagram of a tooth plate according to a preferred embodiment of the present invention;

[0026] Figure 7 This is a three-dimensional diagram of a scraper according to a preferred embodiment of the present invention;

[0027] In the figure: 1. Sand pool; 11. Mounting frame; 12. Main slide bar; 13. Sprocket; 14. Chain; 15. Frequency conversion servo motor; 16. Mounting base; 17. Main laser sensor; 18. Secondary slide bar; 2. Buffer; 21. Slide rail; 22. Slider; 23. Secondary laser sensor; 3. Push plate; 31. Tooth plate; 32. Scraper; 4. Display board. DETAILED DESCRIPTION

[0028] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0029] like Figure 1-Figure 7 As shown, the utility model is an intelligent shot-throwing tester, comprising: a sand pool 1, a display panel 4 is provided on one side of the sand pool 1, two mounting brackets 11 are provided on one side of the sand pool 1, two main slide bars 12 are fixed to the inner walls of the two mounting brackets 11, two sprockets 13 are provided below the main slide bars 12, and the axle of one sprocket 13 is docked with a frequency conversion servo motor 15, the two sprockets 13 are meshed and connected with a chain 14, a mounting seat 16 is fixed on the chain 14, the mounting seat 16 is slidably connected to the main slide bar 12, and a main laser sensor 17 is fixed on the mounting seat 16;

[0030] The buffer portion 2 is mounted on the mounting seat 16 .

[0031] Through the above structure, the sand pool 1, the mounting frame 11, the sprocket 13, the variable frequency servo motor 15 and the display board 4 are all fixed on the ground. Taking the throwing point as the starting point, the thrower stands near one end of the sand pool 1 and near the side of the variable frequency servo motor 15, and throws the solid ball into the inner cavity of the sand pool 1. The inside of the sand pool 1 is filled with sand, and the solid ball falls on the sand between the starting point and the main laser sensor 17. When the variable frequency servo motor 15 is in the standby state, the mounting seat 16 is located on the side away from the variable frequency servo motor 15, and the distance between the mounting seat 16 and the starting point is L0. At this time, the variable frequency servo motor 15 is started, and the number of revolutions of the variable frequency servo motor 15 is continuously sent to the display board 4 through an electrical signal. When the variable frequency servo motor 15 rotates one circle, the variable frequency servo motor 15 drives the mounting seat 16 to move a distance La through the chain 14. The number of revolutions N of the variable frequency servo motor 15 corresponds to the moving distance of the mounting seat 16, which is L=N x La, the variable frequency servo motor 15 drives the axially fixed sprocket 13 to rotate, thereby causing the chain 14 to continuously rotate on the two sprockets 13, and the chain 14 drives the mounting seat 16 to move toward the side close to the variable frequency servo motor 15. The main laser sensor 17 moves with the mounting seat 16. The side panel on one side of the sand pool 1 is higher than the other side panels. The two mounting brackets 11 are located on the side of the side panel close to the lower side. The height of the mounting seat 16 is higher than the height of the lower side panel of the sand pool 1. The laser emitted by the main laser sensor 17 is irradiated on the side panel on the higher side of the sand pool 1. When the main laser sensor As the sensor 17 moves following the mounting base 16, the laser emitted by the main laser sensor 17 illuminates the solid ball falling on the sand. The emitted laser cannot illuminate the side panel on the higher side of the sand pool 1. At this time, the main laser sensor 17 receives an electrical signal, and the main laser sensor 17 sends the electrical signal to the variable frequency servo motor 15 and the display board 4. The variable frequency servo motor 15 stops running, and the display board 4 records the number of revolutions of the variable frequency servo motor 15 as N. The result of throwing the solid ball is Lb=L0-L, which is very convenient for measuring the distance of throwing the solid ball.

[0032] The buffer part 2 includes a slide rail 21, a slider 22 and a secondary laser sensor 23. The slide rail 21 is fixed on the mounting seat 16, the slider 22 is installed on the slide rail 21, and the secondary laser sensor 23 is fixed on the slider 22. The main laser sensor 17 and the secondary laser sensor 23 are located at the same height.

[0033] As described above, the secondary laser sensor 23 and the main laser sensor 17 move synchronously with the mounting base 16. The secondary laser sensor 23 is located between the variable frequency servo motor 15 and the main laser sensor 17. When the secondary laser sensor 23 moves toward the solid ball falling on the sand, in order to quickly measure the distance of the solid ball, the variable frequency servo motor 15 drives the mounting base 16 to move faster. When the laser emitted by the secondary laser sensor 23 irradiates the solid ball, the secondary laser sensor 23 sends an electrical signal to the variable frequency servo motor 15, and the speed of the variable frequency servo motor 15 is reduced, so that the variable frequency servo motor 15 can move faster. The speed of the motor 15 is reduced, and the main laser sensor 17 moves slowly toward the solid ball to avoid the rapid rotation of the variable frequency servo motor 15. The main laser sensor 17 follows the rapid movement of the mounting base 16. The mounting base 16 and the main laser sensor 17 cannot stop in time, and the variable frequency servo motor 15 cannot stop in time, thereby affecting the moving distance of the mounting base 16 and the accuracy of the test. When the laser emitted by the main laser sensor 17 irradiates the solid ball, the variable frequency servo motor 15 rotates at a low speed, so the variable frequency servo motor 15 can stop in time, thereby improving the accuracy of the test results.

[0034] The slide rail 21 is slidably connected to the slider 22 . The slider 22 is threaded with a screw, and the bottom end of the screw is attached to the slide rail 21 .

[0035] As described above, the secondary laser sensor 23 and the slider 22 move synchronously. When the threaded screw is rotated and the bottom end of the screw is not in contact with the slide rail 21, the slider 22 and the secondary laser sensor 23 can slide on the slide rail 21, thereby adjusting the distance between the secondary laser sensor 23 and the main laser sensor 17, and then adjusting the time for the variable frequency servo motor 15 to reduce the speed, to avoid the main laser sensor 17 and the solid ball performing photoelectric sensing before the variable frequency servo motor 15 performs stable low rotation, resulting in reduced accuracy.

[0036] The push plate 3 is fixed on the mounting seat 16 , and the tooth plate 31 is fixed on the push plate 3 .

[0037] As mentioned above, the bottom end of the tooth plate 31 is located below the surface of the sand inside the sand pool 1 and lower than the bottom end of the solid ball. The tooth plate 31 moves with the mounting base 16. After the test is completed, the speed of the variable frequency servo motor 15 will increase, and the tooth plate 31 will continue to rotate as the variable frequency servo motor 15 approaches the starting point. The tooth plate 31 will drive the solid ball that falls on the sand and move it to a place near the starting point. When it is near the starting point, the variable frequency servo motor 15 stops rotating and sends the solid ball to a place near the starting point, which is convenient for the throwing personnel to conduct the next throwing test. It is very convenient and intelligent.

[0038] The tooth plate 31 has a pointed appearance at one end close to the main laser sensor 17 , and both ends of the tooth plate 31 are chamfered.

[0039] One end of the tooth plate 31 is pointed, and both ends of the tooth plate 31 are chamfered to facilitate the flow of sand between the tooth plates 31, reduce the resistance of the tooth plate 31 moving in the sand, and avoid large resistance when the tooth plate 31 moves following the mounting base 16, so that the equipment can operate stably.

[0040] A scraper 32 is fixed on the mounting seat 16 , and the push plate 3 is located between the main laser sensor 17 and the scraper 32 .

[0041] When a solid ball falls on the sand, the sand will become uneven. The bottom end of the scraper 32 is attached to the surface of the sand. The scraper 32 will push the uneven sand while following the movement of the mounting base 16 to prevent the uneven and raised sand from blocking the main laser sensor 17 and the secondary laser sensor 23. The test tooth plate 31 that affects the distance of the thrown solid ball will push the sand when it moves in the sand. The sand will flow in the gap between the tooth plates 31, and the height of the resulting gullies will be lower than the height of the main laser sensor 17 and the secondary laser sensor 23, which will not affect the operation of the main laser sensor 17 and the secondary laser sensor 23.

[0042] A secondary slide bar 18 is fixedly connected between the two mounting frames 11 , and the secondary slide bar 18 is slidably connected to the mounting seat 16 .

[0043] As mentioned above, the secondary slide bar 18 limits the sliding of the mounting seat 16, and the mounting seat 16 slides on the main slide bar 12 and the secondary slide bar 18, so as to prevent the mounting seat 16 from rotating when sliding on the main slide bar 12 alone, affecting the shaking of the mounting seat 16, the main laser sensor 17, and the secondary laser sensor 23 when moving, thereby affecting the accuracy of solid ball detection.

[0044] Both the main slide bar 12 and the secondary slide bar 18 are engraved with scales, and the values of the scales gradually increase from the frequency conversion servo motor 15 to the mounting seat 16 side.

[0045] As mentioned above, when the variable frequency servo motor 15 rotates, it sends an electrical signal to the display panel 4 to generate a corresponding moving distance of the mounting seat 16, which can be compared with the scale difference generated when the mounting seat 16 moves on the main slide bar 12 and the secondary slide bar 18. This can facilitate the inspection of the accuracy of the variable frequency servo motor 15 sending an electrical signal to the display panel 4 to generate the corresponding moving distance of the mounting seat 16, that is, calibration. Users can regularly calibrate the entire equipment, which is very convenient and avoids affecting the detection results of the solid ball.

[0046] Working principle: Taking the throwing point as the starting point, the thrower throws the solid ball into the inner cavity of the sand pool 1, which is filled with sand. The solid ball falls on the sand and is located between the starting point and the main laser sensor 17. The distance between the mounting base 16 and the starting point is L0. The number of revolutions of the variable frequency servo motor 15 is continuously sent to the display board 4 through an electrical signal. When the variable frequency servo motor 15 rotates one circle, the distance La driven by the variable frequency servo motor 15 through the chain 14 is set. The number of revolutions N of the variable frequency servo motor 15 corresponds to the distance L of the mounting base 16. La, the variable frequency servo motor 15 drives the chain 14 to drive the mounting base 16 to move toward the side close to the variable frequency servo motor 15, and the main laser sensor 17 moves with the mounting base 16. The height of the mounting base 16 is higher than the height of the lower side plate of the sand pool 1. The laser emitted by the main laser sensor 17 is irradiated on the side plate on the higher side of the sand pool 1. When the main laser sensor 17 moves with the mounting base 16, the laser emitted by the main laser sensor 17 irradiates the solid ball falling on the sand, and the emitted laser cannot irradiate the side plate on the higher side of the sand pool 1. At this time, the main laser sensor 17 The laser sensor 17 receives the electrical signal, and the main laser sensor 17 sends the electrical signal to the variable frequency servo motor 15 and the display board 4. The variable frequency servo motor 15 stops running, and the display board 4 records the number of revolutions of the variable frequency servo motor 15 as N. Then, the result of throwing the solid ball is Lb=L0-L, which is very convenient for measuring the distance of throwing the solid ball. At the same time, the tooth plate 31 moves with the mounting seat 16, driving the solid ball that falls on the sand and sending the solid ball to a place near the starting point, which is convenient for the thrower to conduct the next throwing test. It is very convenient and intelligent.

[0047] The electrical circuits between the variable frequency servo motor 15, the main laser sensor 17, the secondary laser sensor 23, and the display panel 4, as well as the required supporting equipment such as the driver and the frequency converter are existing mature technologies and will not be described in detail in this utility model.

[0048] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An intelligent shot-throwing tester, characterized in that: include: A sand pool (1), a display panel (4) is provided on one side of the sand pool (1), two mounting frames (11) are provided on one side of the sand pool (1), two main slide bars (12) are fixed on the inner walls of the two mounting frames (11), two sprockets (13) are provided below the main slide bars (12), and the axle of one of the sprockets (13) is docked with a variable frequency servo motor (15), a chain (14) is meshed and connected on the two sprockets (13), a mounting seat (16) is fixed on the chain (14), the mounting seat (16) is slidably connected to the main slide bar (12), and a main laser sensor (17) is fixed on the mounting seat (16); A buffer portion (2) is mounted on the mounting seat (16).

2. The intelligent shot-throwing tester according to claim 1, wherein: The buffer portion (2) comprises a slide rail (21), a slider (22) and a secondary laser sensor (23); the slide rail (21) is fixed on a mounting seat (16); the slider (22) is mounted on the slide rail (21); the secondary laser sensor (23) is fixed on the slider (22); and the primary laser sensor (17) and the secondary laser sensor (23) are located at the same height.

3. The intelligent shot-throwing tester according to claim 2, wherein: The slide rail (21) is slidably connected to the slider (22); a screw is threadedly connected to the slider (22); and the bottom end of the screw is attached to the slide rail (21).

4. The intelligent shot-throwing tester according to claim 1, wherein: A push plate (3) is fixed on the mounting seat (16), and a tooth plate (31) is fixed on the push plate (3).

5. The intelligent shot-throwing tester according to claim 4, characterized in that: The tooth plate (31) has a pointed appearance at one end close to the main laser sensor (17), and both ends of the tooth plate (31) are chamfered.

6. The intelligent shot-throwing tester according to claim 4, characterized in that: A scraper (32) is fixed on the mounting seat (16), and the push plate (3) is located between the main laser sensor (17) and the scraper (32).

7. The intelligent shot-throwing tester according to claim 1, wherein: A secondary slide bar (18) is fixedly connected between the two mounting frames (11), and the secondary slide bar (18) is slidably connected to the mounting seat (16).

8. The intelligent shot-throwing tester according to claim 7, characterized in that: The main slide bar (12) and the secondary slide bar (18) are both engraved with scales, and the values of the scales gradually increase from the frequency conversion servo motor (15) to the side of the mounting seat (16).

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