A device for testing the coefficient of elasticity of a baseball

Abstract

The utility model discloses a kind of bat ball elasticity coefficient test equipment, it includes: launching device, it contains by first motor driven first cylinder and by second motor driven second cylinder installed on support, first cylinder and second cylinder are oppositely spaced, interval forms spheroid acceleration channel, the front end of the acceleration channel is communicated into ball channel, the rear end of the acceleration channel is communicated out ball channel;Variable speed control system, the rotational speed of first motor and second motor is adjusted, when first motor and second motor rotational speed are same, bat ball linearly shoots out;Test chamber, it is equipped with the incident window of the communication out ball channel, the impact plate of being fixed on wall away from incident window, the speed measuring device of being oppositely arranged with impact plate.The utility model can efficiently test the elasticity coefficient of bat ball, and can also be used to test the anti-hitting capability of other samples.

Description

Technical Field

[0001] This utility model relates to the field of sports equipment testing, specifically to a baseball / softball elasticity coefficient testing device. Background Technology

[0002] The T / CBAA 2001-2021 and T / CSGF 011-2021 Baseball Standards, in conjunction with relevant international and domestic standards, have been used to develop parameter standards for baseball equipment at different levels and for different age and skill levels, tailored to the target users of baseball in China. These standards cover specifications and performance requirements for the baseball's circumference, mass, pressure resistance, and elasticity coefficient, as well as new schemes regarding appearance and limits on hazardous substances. The ball's pressure resistance primarily controls the contact time between the ball and the bat. If the ball's pressure resistance is too high, the contact time is too short, resulting in a too-fast flight time that leaves players with little time to react, potentially causing injury. Stable pressure resistance ensures player safety. Conversely, if the ball's pressure resistance is too low, the contact time is too long, resulting in a slow flight time that affects the game's enjoyment and intensity. The ball's elasticity coefficient determines its elasticity and has a significant impact on the game. A higher elasticity coefficient results in a farther flight distance after being hit. Furthermore, balls with a high elasticity coefficient may cause the "bouncy ball" phenomenon, increasing the frequency of home runs and affecting the fairness of the game. This is the first group standard in Taiwan to propose technical requirements and testing methods for elasticity coefficient and pressure resistance performance.

[0003] However, there is currently no suitable equipment in China to test the elasticity coefficient, leading to inconsistent training levels among teams and making it impossible to benchmark against each other. Furthermore, event organizers are unable to regulate the management of equipment, resulting in unfair competition. Therefore, from the perspectives of industry, fair competition, and users purchasing benchmark products, a testing device capable of measuring the elasticity coefficient of baseballs and softballs is needed.

[0004] To this end, the applicant conducted research and development, resulting in this utility model. Summary of the Invention

[0005] In view of this, in order to solve the above-mentioned technical problems, the purpose of this utility model is to propose a baseball / softball elasticity coefficient testing device, which can efficiently test the elasticity coefficient of baseball / softball.

[0006] The technical solution adopted is as follows: This utility model discloses a baseball / softball elasticity coefficient testing device, which includes: The launching device includes a first cylinder driven by a first motor and a second cylinder driven by a second motor, mounted on a bracket. The first cylinder and the second cylinder are arranged at a distance from each other, and the distance forms a ball acceleration channel. The front end of the acceleration channel is a ball-in channel, and the rear end of the acceleration channel is a ball-out channel. The speed control system adjusts the speed of the first motor and the second motor. When the speeds of the first motor and the second motor are the same, the baseball / softball is launched in a straight line. The testing chamber is equipped with an entrance window that connects to the ball ejection channel, an impact plate fixed to the wall away from the entrance window, and a speed measuring device set opposite to the impact plate.

[0007] Furthermore, the speed measuring device is one of the following: a speed measuring device combining infrared light emission and photoelectric detector, a high-speed camera speed measuring machine, a radar speed measuring instrument, a laser Doppler speed measuring instrument, an ultrasonic speed measuring instrument, an encoder speed measuring instrument, a Hall effect speed measuring instrument, a fiber optic speed measuring instrument, and a pressure sensor speed measuring instrument.

[0008] Furthermore, the speed measuring device includes a first speed measuring device and a second speed measuring device, with one side of the first speed measuring device disposed opposite to the impact plate, and the other side of the first speed measuring device disposed opposite to the second speed measuring device.

[0009] Furthermore, the baseball / softball elasticity coefficient testing equipment also includes: A data processor, electrically connected to the first and second speed measuring devices, is configured according to formula C. R =V 反弹 / V 入射 Calculate the elastic coefficient; where the first and second velocity measuring devices together measure a velocity, V. 入射 = Incident distance ÷ Time, V 反弹 = Rebound distance ÷ Time, where both the incident distance and the rebound distance are the distances between the first and second velocity measuring devices; the first and second velocity measuring devices are time-measuring devices, one being the starting point and the other the ending point of the time measurement, V 入射 and V 反弹 It is the average speed of the ball between the first and second speed measuring devices.

[0010] Furthermore, the baseball / softball elasticity coefficient testing equipment also includes a printer, which is electrically connected to the data processor and is used to print the elasticity coefficient as the test result, and print it out in a pre-set format.

[0011] Furthermore, the baseball / softball elasticity coefficient testing device also includes a display, which is electrically connected to the data processor.

[0012] Furthermore, the bottom of the test chamber is provided with a recovery ramp, the high end of which is located in the area below the bottom of the impact plate, and the low end of which is provided with an opening for recovering baseballs and softballs. One end of the recovery channel is connected to the opening, and the other end of the recovery channel extends to the support.

[0013] Furthermore, the launching device is replaced by a pneumatic launching device that uses the principle of air compression, is powered by an air compressor, and works with a ball-loading bucket, a launching barrel, and an intelligent control box to achieve the automatic launching function of baseballs.

[0014] The beneficial effects of this utility model are as follows: This invention uses a first cylinder driven by a first motor and a second cylinder driven by a second motor, mounted on a bracket, and the gap between the first and second cylinders to form a ball acceleration channel. In this way, the speed of the ball can be controlled by controlling the speed of the first and second motors through a speed control system, and the launch direction can be precisely controlled by having equal speeds, so that the elastic coefficient of baseballs and softballs can be measured quickly and accurately in the test chamber.

[0015] Therefore, this utility model can provide corresponding equipment for testing the elasticity coefficient. Event organizers can regulate the management of event equipment to ensure fair and just competition. Users can purchase benchmark products to ensure that the hitting speed and elasticity during use are within a safe standard range. Manufacturers can produce benchmark elasticity coefficient standard products to meet market circulation, event supervision, scientific research cooperation, etc., which is beneficial to the industry.

[0016] In addition, the testing equipment of this invention can also be used to test the impact resistance of other samples, such as masks, helmets or baseball bats, and observe the degree of damage to the samples after multiple impacts at a certain impact speed. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the external structure of a baseball / softball elasticity coefficient testing device according to Example 1.

[0019] Figure 2 for Figure 1 The testing equipment includes a schematic diagram of the internal structure of the testing chamber.

[0020] Figure 3 This is a schematic diagram of the structure of a launching device according to Embodiment 1.

[0021] Figure 4 This is a circuit block diagram of Example 1.

[0022] Figure 5 This is a schematic diagram of a baseball / softball elasticity coefficient testing device according to Example 2. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1 See Figures 1-3 As shown, this embodiment of a baseball / softball elasticity coefficient testing device includes: Launching device 1 includes a first cylinder 12 driven by a first motor 11 and a second cylinder 14 driven by a second motor 13, mounted on a bracket 16. The first cylinder 12 and the second cylinder 14 are arranged at a distance from each other, and the distance 15 forms a ball acceleration channel. The front end of the acceleration channel is a ball-in channel 17, and the rear end of the acceleration channel is a ball-out channel. The speed control system 2 independently adjusts the speed of the first motor 11 and the second motor 13. When the speeds of the first motor 11 and the second motor 13 are the same, the baseball / softball is launched in a straight line. The test chamber 3 is provided with an entrance window 31 that connects to the ball ejection channel, an impact plate 33 fixed to a wall 32 away from the entrance window 31, a first velocity measuring device 34 disposed opposite to the impact plate 33, and a second velocity measuring device 35 disposed opposite to the first velocity measuring device 34. The impact plate may be, for example, a metal impact plate or a hard wooden board.

[0025] In this way, a sphere acceleration channel is formed by the first cylinder driven by the first motor and the second cylinder driven by the second motor, both mounted on the bracket, and the gap between them. The speed of the sphere can be controlled by adjusting the speeds of the first and second motors through a speed control system. Furthermore, the desired direction can be precisely controlled by maintaining equal speeds, thereby quickly achieving the required sphere launch speed and direction, improving detection efficiency and effectiveness, and rapidly and accurately measuring the elastic coefficient (C). R .

[0026] When the rotational speeds of the first and second motors are equal, the baseball / softball is launched in a straight line. If their rotational speeds are unequal, the baseball / softball is launched at an angle. Generally, controlling the rotational speeds of the first and second motors to be equal allows for precise control of the baseball / softball's launch direction. When the rotational speeds of the first or second motor are equal, there is a linear or positive correlation between the rotational speed of the first or second motor and the launch speed of the baseball / softball, thus allowing for precise control of the launch speed by adjusting the rotational speeds of the first and second motors.

[0027] The first and second cylinders can preferably use wheels of the same model and size, which will generate centrifugal forces of the same magnitude and direction at both ends of the ball, thereby allowing for better control of the launch speed and direction of the baseball / softball.

[0028] As one specific implementation, the baseball / softball elasticity coefficient testing device further includes: Data processor 4, which is electrically connected to the first speed measuring device 34 and the second speed measuring device 35, is configured via formula C. R =V 反弹 / V 入射 Calculate the elastic coefficient; where the first and second velocity measuring devices together measure a velocity, V. 入射 = Incident distance ÷ Time, V 反弹 = Rebound distance ÷ Time, where both the incident distance and the rebound distance are the distances between the first and second velocity measuring devices; the first and second velocity measuring devices are time-measuring devices, one being the starting point and the other the ending point of the time measurement, V 入射 and V 反弹 It is the average speed of the ball between the first and second speed measuring devices.

[0029] That is, the average velocity is measured using a time-displacement method. For example, when testing the incident velocity, the second velocity measuring device measures the first time point t1, and the first velocity measuring device measures the second time point t2. Since the distance S between the first velocity measuring device and the second velocity measuring device is fixed, the incident velocity V can be obtained from S / (t2-t1). 入射 Similarly, when testing the rebound speed, the first velocimetry device measures the first time point t1', and the second velocimetry device measures the second time point t2'. Therefore, the rebound speed V can be obtained from S / (t2'-t1'). 反弹 .

[0030] Both the first and second speed measuring devices can be selected from commonly used combinations of infrared emitters and photodetectors. This combination is suitable for testing in enclosed spaces. The first and second speed measuring devices work together to measure a speed, calculated as distance ÷ time. Typically, the time it takes for one speed measuring device to send a start signal and the time it takes for the other to send a stop signal are used to calculate the speed based on the time difference and distance.

[0031] In this way, the data processor can quickly process the data, thereby enabling the automatic output of the elasticity coefficient measurement data.

[0032] As one specific implementation, the baseball / softball elasticity coefficient testing device further includes: Printer 7, which is electrically connected to data processor 4, is used to print speed data as test results and print in a pre-set format.

[0033] As one specific implementation, the baseball / softball elasticity coefficient testing device further includes: Display 5 is electrically connected to data processor 4.

[0034] The display can provide, for example, playback, input of test settings, input of test sample name, model and parameter data, name of the company submitting the test, test speed, number of cycles, test personnel, etc.

[0035] In one specific implementation, the launching device 1 is enclosed by a protective net, and the test chamber 3 is equipped with an observation window 36 and a safety door 37. This enhances safety. The speed of a baseball or softball can, for example, reach the simulated hitting speed of an athlete at 26.82 m / s ± 0.3 m / s. This speed would cause injury if it hits someone, so the test chamber must be sealed off. The observation window facilitates observation, and the safety door allows for easy access for maintenance.

[0036] In one specific implementation, the distance between the first velocity measuring device and the impact plate is 304.8mm ± 3.2mm, the distance between the first velocity measuring device and the second velocity measuring device is 304.8mm ± 3.2mm, and the distance between the ball outlet channel port and the impact plate is 2440mm. These fixed distances allow for stable data measurement and the establishment of testing standards.

[0037] As one specific implementation, the bottom of the test chamber 3 is provided with a recovery ramp 38. The high end of the recovery ramp 38 is located in the area below the bottom of the impact plate 33. The low end of the recovery ramp 38 is provided with an opening 39 for recovering baseballs and softballs. One end of the recovery channel 6 is connected to the opening, and the other end of the recovery channel 6 extends to the support 16.

[0038] This can further improve testing efficiency. Baseballs and softballs can be automatically retrieved, eliminating the need for manual ball collection. Manually collecting balls in the testing room also carries the safety risk of accidental hitting.

[0039] A method for testing the elasticity coefficient of baseballs and softballs, which uses a baseball / softball elasticity coefficient testing device for testing, and the testing method includes the following steps: S1. Set the target launch angular velocity through the speed control system; S2. The launching mechanism propels the baseball / softball towards the impact plate in the test chamber; S3. The velocity measuring device collects the incident velocity V. 入射 and rebound speed V 反弹 ; S4. The data processor calculates the elasticity coefficient C. R =V 反弹 / V 入射 ; S5. The rebounding ball rolls into the recovery hole via the recovery ramp, and then returns to the support of the launching mechanism through the recovery channel; S6. Repeat steps S2-S5 above to complete 6-12 consecutive tests. Output the average elasticity coefficient through the data processor, that is, the data processor calculates the average elasticity coefficient using the following formula and then outputs the average elasticity coefficient: C R =(∑ n i=1 (V 反弹i / V 入射i )) / n, where n = 6 - 12, and n is a natural number.

[0040] In summary, this invention achieves a dual-rotating body by rotating the first and second cylinders. The speed control of the dual-rotating body enables the required launch speed for baseballs and softballs, as well as the precise launch direction. Combined with a closed testing chamber and an automatic recovery channel, it achieves high-efficiency continuous testing. Finally, it can automatically output the average value of the elastic coefficient, thus realizing an effective baseball elastic coefficient testing device for measuring the elastic coefficient of baseballs and softballs.

[0041] This testing equipment can also be used to test the impact resistance of other samples, such as masks, helmets, or baseball bats, by subjecting them to a certain impact speed and observing the degree of damage to the samples after multiple impacts.

[0042] This testing equipment also requires some standard electronic components and parts, such as a printer controller, a general power supply, a large paper roll, a paper roll holder, the size of the monitor screen, BNC cables, etc. I will not go into detail about each electronic component or part.

[0043] It should be noted that the baseball / softball mentioned refers to baseball or softball.

[0044] Example 2 See Example 1, except that... Figure 5 As shown, the speed measuring device 30 in this embodiment is a single speed measuring device that directly measures speed. In one specific implementation, the speed measuring device is one of the following: a high-speed camera speed measuring machine, a radar speed measuring instrument, a laser Doppler speed measuring instrument, an ultrasonic speed measuring instrument, an encoder speed measuring instrument, a Hall effect speed measuring instrument, a fiber optic speed measuring instrument, and a pressure sensor speed measuring instrument. In this embodiment, the speed measuring device is, for example, a high-speed camera speed measuring machine, used to directly capture the speed of a baseball / softball before and after colliding with the impact plate.

[0045] Example 3 Referring to Example 1, the difference is that this example uses a different launching device instead of the launching device in Example 1. The launching device in this example is a pneumatic launching device that uses the principle of air compression, powered by an air compressor, and works in conjunction with a ball-loading tank, a launching barrel, and an intelligent control box to achieve automatic launching of baseballs, thus replacing the launching device in Example 1.

[0046] Other launching devices applicable to this utility model can also be used, such as mechanically driven launching devices (the core principle is mechanical friction / impact force), centrifugal (centrifugal force), electromagnetically driven (electromagnetic force), elastic potential energy type (spring / rubber band elastic potential energy), hydraulically driven (hydraulic piston thrust), gravity-assisted type (gravitational potential energy), and pneumatic-mechanical hybrid type (pneumatic + mechanical rotational composite).

[0047] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. All equivalent embodiments or modifications made without departing from the spirit of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A test device for the elasticity coefficient of baseballs and softballs, characterized in that, include: The launching device includes a first cylinder driven by a first motor and a second cylinder driven by a second motor, mounted on a bracket. The first cylinder and the second cylinder are arranged at a distance from each other, and the distance forms a ball acceleration channel. The front end of the acceleration channel is a ball-in channel, and the rear end of the acceleration channel is a ball-out channel. The speed control system adjusts the speed of the first motor and the second motor. When the speeds of the first motor and the second motor are the same, the baseball / softball is launched in a straight line. The testing chamber is equipped with an entrance window that connects to the ball ejection channel, an impact plate fixed to the wall away from the entrance window, and a speed measuring device set opposite to the impact plate.

2. The baseball / softball elasticity coefficient testing device according to claim 1, characterized in that, The speed measuring device is one of the following: a speed measuring device combining infrared light emission and photoelectric detector, a high-speed camera speed measuring machine, a radar speed measuring instrument, a laser Doppler speed measuring instrument, an ultrasonic speed measuring instrument, an encoder speed measuring instrument, a Hall effect speed measuring instrument, a fiber optic speed measuring instrument, and a pressure sensor speed measuring instrument.

3. The baseball / softball elasticity coefficient testing device according to claim 1, characterized in that, The speed measuring device includes a first speed measuring device and a second speed measuring device. One side of the first speed measuring device is disposed opposite to the impact plate, and the other side of the first speed measuring device is disposed opposite to the second speed measuring device.

4. The baseball / softball elasticity coefficient testing device according to claim 3, characterized in that, Also includes: A data processor, electrically connected to the first and second speed measuring devices, is configured according to formula C. R =V 反弹 / V 入射 Calculate the elastic coefficient; where the first and second velocity measuring devices together measure a velocity, V. 入射 = Incident distance ÷ Time, V 反弹 = Rebound distance ÷ Time, where both the incident distance and the rebound distance are the distances between the first and second velocity measuring devices; the first and second velocity measuring devices are time-measuring devices, one being the starting point and the other the ending point of the time measurement, V 入射 and V 反弹 It is the average speed of the ball between the first and second speed measuring devices.

5. The baseball / softball elasticity coefficient testing device according to claim 4, characterized in that, Also includes: The printer, which is electrically connected to the data processor, is used to print the elasticity coefficient as a test result and print it out in a pre-set format.

6. The baseball / softball elasticity coefficient testing device according to claim 4, characterized in that, Also includes: A display, which is electrically connected to the data processor.

7. The baseball / softball elasticity coefficient testing device according to claim 1, characterized in that, The test chamber has a recovery ramp at the bottom. The high end of the recovery ramp is located in the area below the bottom of the impact plate. The low end of the recovery ramp has an opening for recovering baseballs and softballs. One end of the recovery channel is connected to the opening, and the other end of the recovery channel extends to the support.

8. The baseball / softball elasticity coefficient testing device according to claim 1, characterized in that, The launching device is replaced by a pneumatic launching device that uses the principle of air compression, is powered by an air compressor, and is equipped with a ball-loading bucket, a launching barrel, and an intelligent control box to achieve the automatic launching function of baseballs.

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