CN203518955U - Tennis ball pressure resistance deformation laser detection device - Google Patents

Abstract

The utility model discloses a tennis ball anti-pressure deformation laser detection device, which comprises a base, a bracket is installed on the base, a weight back board is installed on one end of the bracket, a chute is arranged on the weight back board, and the inside of the chute is clamped The connecting rod of the heavy hammer chute, one end of the connecting rod of the heavy hammer chute is connected with the heavy hammer, the electronic scale is arranged under the heavy hammer, the electronic scale is installed on the bracket, the scale is provided on the bracket, and the two sides of the chute The side is provided with a scale, and the middle part of the weight is provided with a through hole, and a laser range finder is slidably installed in the through hole, and the laser range finder is connected with the host computer. Compared with the prior art, the utility model overcomes the dependence on the traditional "manufacturer designation method", and provides a scientific, rigorous, comprehensive and convenient tennis specification testing device for the majority of tennis fans, which can clearly judge the Test whether the tennis ball meets the requirements of the international "Tennis Rules", so as to provide a guarantee for a more scientific and rigorous tennis game and training.

Description

Tennis ball anti-pressure deformation laser detection device

technical field

The utility model relates to a tennis ball anti-pressure deformation laser detection device.

Background technique

The tennis rules promulgated by the International Tennis Federation have clear requirements on the specifications of game balls: round and elastic. When 18 lbs (8.165 kg) of pressure is applied to the ball, the inward elastic deformation should be between 0.22 inches (0.559 cm) and 0.29 inches (0.737 cm) and the rebound deflection after compression should be in the range of 0.315 inches (0.8 cm) and 0.425 inches (1.08 cm). These two deformation data should be the average value obtained after testing the three axes of the ball. In each case the difference between any two figures cannot be greater than 0.03 inches (0.076 cm).

At present, balls for large-scale tennis games usually use designated brand tennis balls produced by manufacturers designated by the International Tennis Federation. For grassroots game balls and tennis balls produced by non-designated manufacturers, there is currently no professional testing device.

Utility model content

The purpose of this utility model is to solve the above-mentioned problems and provide a tennis ball anti-pressure detection device, which has the advantages of effectively detecting tennis ball resistance and providing a scientific basis for tennis games and training.

In order to achieve the above object, the utility model adopts the following technical solutions:

A tennis ball anti-pressure deformation laser detection device, which includes a base, a bracket is installed on the base, a weight back board is installed on one end of the bracket, and a chute is provided on the weight back board, and the weight chute is clamped in the chute. Rod, one end of the connecting rod of the weight chute is connected with the weight, an electronic scale is arranged under the weight, the electronic scale is installed on a bracket, a scale is set on the bracket, and scales are set on both sides of the chute, The middle part of the weight is provided with a through hole, and a laser range finder is slidably installed in the through hole, and the laser range finder is connected with the host computer.

The electronic scale is provided with a display and a drawer.

A horizontal adjustment knob is provided around the base.

A level is installed on the base, and a horizontal calibration bubble is arranged in the level.

Anti-pressure deformation detection (take the weight of the tested tennis ball as an example):

(1) Heavy hammer weight calibration: make the heavy hammer fall stably on the weighing platform of the electronic scale, and weigh the weight of the heavy hammer (due to the friction of the chute, the weighing reading of the heavy hammer may be less than 18 pounds), and use it more The weights are 0.1 lb, 0.2 lb, and 0.5 lb, and they are constantly calibrated so that the display of the electronic scale displays 18 lbs;

(2) Gently pick up the calibrated weight and raise it by 7 cm;

(3) Place the tested tennis ball on the weighing table of the electronic scale and keep it in a static state;

(4) Slowly lower the weight, so that the lower edge plane of the weight gradually approaches the top of the tennis ball to be tested;

(5) Observe the data changes on the display of the electronic scale [when the weight does not hit the tennis ball, the screen display should be the original weight of the tested tennis ball, for example: 2 ounces (56.7 grams)];

(6) When the display data of the electronic scale changes (that is, the moment the weight touches the top of the tested tennis ball), fix the weight, read the original diameter of the tested tennis ball from the lower edge of the weight, and use the scales on both sides of the chute value, and use the laser rangefinder to measure the distance between the laser rangefinder and the detected tennis ball, and upload it to the host computer for record;

(7) Release the weight so that the weight falls naturally on the tennis ball to be tested;

(8) By observing the weight change of the electronic scale display, confirm whether the detected tennis ball is under 18 pounds of pressure [If the detected tennis ball is under 18 pounds of pressure, then the data on the electronic scale display should be: the sum of the original weight of the tennis ball and 18 pounds . For example, the original weight of the tested tennis ball is 2 ounces. After the weight is naturally pressed, the displayed weight should be 18 pounds and 2 ounces (that is, the tested tennis ball is under 18 pounds of pressure); It is not "the sum of the original weight of the tennis ball and 18 pounds". At this time, use multiple weights to adjust again until the reading on the display is 18 pounds and 2 ounces (ie: the sum of the original weight of the tennis ball and 18 pounds);

(9) Read the deformation data of the detected tennis ball after the weight is naturally dropped to apply pressure, use the laser rangefinder to measure the distance from the laser rangefinder to the detected tennis ball at this time, and upload it to the host computer for recording;

(10) Pick up the heavy hammer instantly, record the shortest distance between the laser rangefinder and the detected tennis ball measured by the laser rangefinder, and upload it to the host computer for recording;

(11) Rotate the tested tennis ball, repeat steps 2-10, and measure the data after the pressure deformation of the X, Y, and Z axes of the tested tennis ball;

(12) Make a scientific judgment on the tested tennis ball's anti-stress index: when a pressure of 18 pounds (8.165 kg) is applied to the ball, the inward elastic deformation should be between 0.22 inches (0.559 cm) and 0.29 inches (0.737 cm) Between, the deformation data should be the average value obtained after testing the three axes of the ball.

Beneficial effects of the utility model: compared with the prior art, the present invention overcomes the dependence on the traditional "manufacturer designation method", and provides a scientific, rigorous, comprehensive and convenient tennis ball specification for the majority of tennis fans The detection device is used to clearly judge whether the tested tennis ball meets the requirements of the international "Tennis Rules", thereby providing a guarantee for more scientific and rigorous tennis competitions and training.

Description of drawings

Fig. 1 is the overall block diagram of the utility model;

Fig. 2 is the partially enlarged view I of the utility model;

Fig. 3 is the partially enlarged view II of the utility model;

Figure 4 is an enlarged schematic view of the base.

Among them, 1. base, 2. bracket, 3. electronic scale, 4. tested tennis ball, 5. weight, 6. weight chute connecting rod, 7. weight back board, 8. display, 9. drawer, 10. spirit level, 11 level adjustment knob, 12. chute, 13. level calibration bubble.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1, Figure 2, and Figure 3, a tennis ball anti-pressure deformation laser detection device includes a base 1, a bracket 2 is installed on the base 1, a weight back board 7 is installed on one end of the bracket 2, and a weight back board 7 There is a chute 12 on the top, and the connecting rod 6 of the heavy hammer chute is clamped in the slot, and one end of the connecting rod 6 of the heavy hammer chute is connected with the heavy hammer 5, and the connecting rod 6 of the heavy hammer chute drives the heavy hammer 5 in the sliding sliding in the groove 12, an electronic scale 3 is arranged under the weight 5, the electronic scale 3 is installed on the bracket 2, a scale is provided on the bracket 2, scales are provided on both sides of the chute 12, and the weight A through hole is arranged in the middle part of the 5, and a laser range finder is slidably installed in the through hole, and the laser range finder is connected with the host computer. When the weight 5 falls, the height of the laser range finder remains unchanged.

The electronic scale 3 is provided with a display 8 and a drawer 9 .

As shown in FIG. 4 , a level adjustment knob 11 is provided around the base 1 , a level 10 is installed on the base 1 , and a level calibration bubble 13 is provided in the level 10 .

The method of using the utility model to detect the pressure resistance of tennis balls (taking the weight of 4 tennis balls to be tested as 2 ounces as an example)

(1) Weight calibration of the weight 5: make the weight 5 stably fall on the weighing platform of the electronic scale 3, and weigh the weight of the weight 5 (due to the friction of the chute 12, the weighing reading of the weight 12 may be less than 18 lbs), using multiple weights of 0.1 lbs, 0.2 lbs, and 0.5 lbs respectively, and continuously calibrating, so that the display 8 of the electronic scale 3 displays 18 lbs;

(2) Gently pick up the calibrated weight 5 and raise it by 7 cm;

(3) Place the detected tennis ball 4 on the weighing table of the electronic scale 3 and keep it in a static state;

(4) Slowly put down the weight 5 so that the bottom of the weight 5 gradually approaches the top of the tested tennis ball 4 along the plane;

(5) Observe the data changes on the display 8 of the electronic scale 3 [when the weight 5 does not press the detected tennis ball 4, the display 8 should display the original weight of the detected tennis ball 4, for example: 2 ounces (56.7 grams)];

(6) When the data of the display 8 of the electronic scale 3 changes (that is, the moment when the weight 5 touches the top of the tennis ball 4 to be detected), fix the weight 5, and use the scales on both sides of the chute 12 from the lower edge of the weight 5 Read out the original diameter value of the detected tennis ball, and use the laser range finder to measure the distance between the laser range finder and the detected tennis ball 4, and upload it to the host computer for recording;

(7) Release the weight 5 so that the weight 5 falls naturally on the tennis ball 4 to be detected;

(8) By observing the weight change of the display 8 of the electronic scale 3, confirm whether the detected tennis ball 4 is subjected to a pressure of 18 pounds, [if the detected tennis ball 4 is subjected to a pressure of 18 pounds, then the data on the display 8 of the electronic scale 3 should be: The sum of the original weight of the tested tennis ball 4 and 18 lbs. For example, the original weight of the detected tennis ball 4 is 2 ounces. After the weight 5 is naturally pressed, the displayed weight should be 18 pounds and 2 ounces (that is, the detected tennis ball 4 has been subjected to a pressure of 18 pounds); Finally, the weight display is not "the sum of the original weight of the detected tennis ball 4 and 18 pounds". At this time, adjust with multiple weights again until the reading on the display 8 is 18 pounds and 2 ounces (that is: the original weight of the detected tennis ball 4 weight and 18 lbs);

(9) Read the deformation data of the detected tennis ball 4 after the weight 5 falls naturally to apply pressure, use the laser rangefinder to measure the distance from the laser rangefinder to the detected tennis ball 4 at this time, and upload it to the host computer for recording;

(10) Pick up the weight 5 instantly, record the shortest distance between the laser range finder and the detected tennis ball 4 measured by the laser range finder, and upload it to the host computer for recording;

(11) Rotate the tested tennis ball 4, repeat the operation steps 2-9, and measure the data after the pressure deformation of the three axes of the tested tennis ball 4X, Y, and Z;

(12) Make a scientific judgment on the pressure resistance index of the tested tennis ball 4: when a pressure of 18 pounds (8.165 kg) is applied to the tested tennis ball 4, the inward elastic deformation should be between 0.22 inches (0.559 cm) and 0.29 inches (0.737 cm), the deformation data should be the average value obtained after testing the three axes of the ball.

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, those skilled in the art do not need to Various modifications or deformations that can be made with creative efforts are still within the protection scope of the present utility model.

Claims (4)

1. a tennis compressive resistance deformation laser detector, it is characterized in that, it comprises base, floor installation has support, support one end is provided with weight backboard, weight backboard is provided with chute, clamping heavy punch chute connecting rod in described chute, one end of heavy punch chute connecting rod is connected with weight, and described weight below is provided with electronic scales, electronic scales is rack-mount, described support is provided with scale, and described chute both sides are provided with scale, and described weight middle part is provided with through hole, the laser range finder that is slidably installed in through hole, laser range finder is connected with host computer.

2. tennis compressive resistance deformation laser detector as claimed in claim 1, is characterized in that, described electronic scales is provided with display and drawer.

3. tennis compressive resistance deformation laser detector as claimed in claim 1, is characterized in that, described perimeter is provided with horizontal adjustment knob.

4. tennis compressive resistance deformation laser detector as claimed in claim 1, is characterized in that, on described base, level meter is installed, and is provided with horizontal alignment bubble in described level meter.

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