A method and device for measuring throwing distance

Abstract

The present invention discloses a throwing distance measurement method and device. The present invention determines the equidistant zone where the first landing point of a thrown object is located according to the change in reflected light intensity, and uses the preset distance corresponding to the equidistant zone as the throwing distance of the thrown object. There is no need for staff to enter the landing area for measurement, and the measurement efficiency is high without any safety hazards.

Description

Technical Field

[0001] The invention relates to a throwing distance measuring method and device, belonging to the field of distance measurement. Background Art

[0002] Throwing sports are one of the main events in track and field sports, such as shot put and javelin. In throwing competitions, the throwing distance needs to be measured. Traditional distance measurement methods include manual measurement with a tape measure and laser measurement, but these methods require staff to enter the landing area for measurement, which has low measurement efficiency and certain safety hazards. Summary of the invention

[0003] The invention provides a method and device for measuring a throwing distance, which solve the problems disclosed in the background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A method for measuring a throwing distance, comprising:

[0006] Obtain the reflected light intensity of each equidistant zone in the landing area from the throwing object to the resting state from the scanning sensor; wherein the equidistant zone is the area between two adjacent equidistant lines in the landing area, and the equidistant line is an arc formed by points with equal radial distances to the scoring or measurement starting position, and the width of each equidistant zone in the landing area is consistent;

[0007] According to the change of reflected light intensity in each equidistant zone, the equidistant zone where the first landing point of the thrown object is located is determined;

[0008] Obtain a preset distance corresponding to the equidistant zone where the first landing point of the projectile is located, and use the preset distance as the projectile throwing distance.

[0009] According to the change of reflected light intensity in each equidistant zone, the equidistant zone where the first landing point of the thrown object is located is determined, including:

[0010] Determine the projection trajectory of the thrown object during the process from being thrown to being stationary according to the change in the intensity of the reflected light and the first preset rule;

[0011] According to the projection trajectory of the thrown object and the second preset rule, the equidistant zone where the first landing point of the thrown object is located is determined.

[0012] The first default rule is:

[0013] If there is a change in reflected light intensity in a certain area of ​​the equidistant band, the projection of the projectile passes through the equidistant band.

[0014] The second preset rule is:

[0015] The turning point in the projection trajectory of the thrown object, where it changes from far to near and then from near to far, is taken as the first landing point of the thrown object.

[0016] A throwing distance measuring device comprises a plurality of measuring units and a control console;

[0017] The measuring unit is arranged above the central axis of the throwing field. The measuring unit includes a light source and a scanning sensor arranged from top to bottom. The light source and the scanning sensor are both connected to a control console. The control console adopts a throwing distance measurement method to measure the throwing distance of the thrown object.

[0018] The light emitted by the light source is polarized light.

[0019] If there is one measuring unit, the measuring unit is located above the center of the throwing circle.

[0020] If there are multiple measuring units, one of them is located above the center of the throwing circle and the remaining measuring units are located above the landing area.

[0021] The beneficial effects achieved by the present invention are as follows: the present invention determines the equidistant zone where the first landing point of the projectile is located according to the change in the intensity of the reflected light, and uses the preset distance corresponding to the equidistant zone as the throwing distance of the projectile. There is no need for staff to enter the landing area for measurement, the measurement efficiency is high, and there is no safety hazard. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a flow chart of the method of the present invention;

[0023] Figure 2 A schematic diagram of the throwing field;

[0024] Figure 3 A schematic diagram showing a scanning sensor located above the center of a throwing circle;

[0025] Figure 4 Schematic diagram of the shot put trajectory;

[0026] Figure 5 Schematic diagram of a scanning sensor located above a landing area. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0028] like Figure 1 As shown, a method for measuring a throwing distance comprises the following steps:

[0029] Step 1, obtaining the reflected light intensity of each equidistant zone in the landing area from the throwing object to the resting state from the scanning sensor; wherein the equidistant zone is the area between two adjacent equidistant lines in the landing area, and the equidistant line is an arc formed by points with equal radial distances to the scoring or measurement starting position, and the width of each equidistant zone in the landing area is consistent;

[0030] Step 2, determining the equidistant zone where the first landing point of the thrown object is located according to the change in the reflected light intensity of each equidistant zone;

[0031] Step 3, obtain the preset distance corresponding to the equidistant zone where the first landing point of the projectile is located, and use the preset distance as the throwing distance of the projectile.

[0032] The above method determines the equidistant zone where the first landing point of the projectile is located according to the change in the intensity of the reflected light, and uses the preset distance corresponding to the equidistant zone as the throwing distance of the projectile. There is no need for staff to enter the landing area for measurement, the measurement efficiency is high, and there is no safety hazard.

[0033] The above method can be applied to a variety of throwing competitions. The following is a further explanation using shot put. Figure 2 As shown in the figure, the throwing field consists of a throwing circle, a restriction line, a toe board and a landing area. In order to facilitate measurement, multiple equidistant lines are set in the landing area. The equidistant lines are arcs formed by points with equal radial distances to the toe board (i.e., the starting position for scoring or measurement). Taking point A in the figure as an example, there is a radial line from A to the center of the throwing circle O. The radial line and the toe board have an intersection point D. The distance between AD is defined as L. Among all the radial lines of the throwing field, as long as the radial distance from the toe board is L, then these points and A are on the same equidistant line. If A is assumed to be the first landing point of the shot put, then AD is the result of the shot put.

[0034] The equidistant lines are not lines drawn in real time, but virtual lines. The area between adjacent equidistant lines in the landing area is defined as an equidistant zone. The width of the equidistant zone is determined according to the actual situation, generally 1 cm. Each equidistant zone corresponds to a distance. For example, the equidistant zone between the 100cm equidistant line and the 101cm equidistant line has a distance of 100cm. As long as the first landing point of the shot put falls within the equidistant zone, the throwing distance of the shot put is consistent with the distance corresponding to the equidistant zone.

[0035] like Figure 3 As shown, in order to facilitate the scanning sensor to obtain the intensity of reflected light, a light source (A in the figure) is generally arranged above the scanning sensor (B in the figure). The emitted light can be visible light of various colors, or invisible infrared or ultraviolet light. However, in order to avoid interference from ambient light, the light emitted by the light source can use polarized light formed by visible light, infrared, and ultraviolet light. The light waves are diffusely reflected on the surface of the shot put field, and the reflected light will be sensed by a scanning sensor at a lower position, thereby realizing real-time scanning of the throwing field.

[0036] During the process from when the shot put is thrown to when it stops, the shot put will affect the reflected light. The intensity of the reflected light is obtained from the scanning sensor. If there is a change in the intensity of the reflected light in a certain area of ​​the equidistant band, it is determined that the projection of the shot put passes through the equidistant band. Therefore, based on this rule, the projection trajectory of the shot put during the process from when the shot put is thrown to when it stops can be determined according to the change in the intensity of the reflected light in each equidistant band.

[0037] like Figure 4 As shown in the figure, from the time the shot put is thrown to the time it stops, its projection will affect the light on the ground. In the figure, A is the light source, B is the scanning sensor, the flight process of the shot put is the abcde line, and its corresponding projection is the a'b'c'd'e' line. As can be seen from the figure, the trajectory of the projection is first from near to far (a' to b'), and then from far to near (c' to d' to e'). When the shot put falls on the e position, e and e' almost overlap, and this position is the result of the throw. However, in actual throwing, the shot put cannot stop after landing, and will roll forward under the action of inertia, so its projection will be from near to far.

[0038] Based on the above analysis, the turning point in the shot put projection trajectory from far to near and then from near to far can be used as the first landing point of the shot put to avoid deviations caused by rolling.

[0039] After the first landing point of the shot put is determined, the equidistant zone where the landing point is located can be determined, and the preset distance corresponding to the equidistant zone is used as the shot put throwing distance.

[0040] The device used for the above distance measurement, i.e. the throwing distance measuring device, comprises a plurality of measuring units and a control console.

[0041] The measuring unit is set up above the central axis of the throwing venue. The measuring unit includes a light source and a scanning sensor arranged from top to bottom. The light source and the scanning sensor are both connected to a control console. The console uses a throwing distance measurement method to measure the throwing distance of the thrown object. The console is a control console with a display, and the display will show the distance measurement result.

[0042] The number of measurement units depends on the length of the site. Currently, the commonly used scanning sensors on the market can scan more than 2,000 equidistant bands, that is, a range of 20m. If the landing area is less than 20m, then one measurement unit can be used. The measurement unit can be Figure 3 As shown, it is set up above the center O of the throwing circle. If the landing area is larger than 20m, using only one measurement unit will result in weak light intensity in the farthest equidistant band, and the scanning sensitivity may have to be very high. Without using a high-power laser, the current sensitivity of the scanning sensor may not be able to achieve high-precision resolution and analysis.

[0043] Therefore, multiple measuring units can be set up above the central axis, one of which is located above the center O of the throwing circle, and the other measuring units are located above the landing area, such as Figure 5 As shown, for example, a measuring unit is placed five meters away from the center of the throwing circle (A5 is the light source and B5 is the scanning sensor in the figure), and the reflected light intensity of each equidistant band is obtained through multiple measuring units. Each group of measuring units is only responsible for measuring the changes in light signals on those equidistant bands that are closer and can be accurately measured.

[0044] Based on the same technical solution, the present application also discloses a computer-readable storage medium storing one or more programs, wherein the one or more programs include instructions, and when the instructions are executed by a computing device, the computing device executes a throwing distance measurement method.

[0045] Based on the same technical solution, the present application also discloses a computing device, including one or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and are configured to be executed by the one or more processors, and the one or more programs include instructions for executing a throwing distance measurement method.

[0046] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0047] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0048] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1A function specified in one or more boxes.

[0049] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0050] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A method for measuring throwing distance, characterized in that: include: Obtain the reflected light intensity of each equidistant zone in the landing area from the throwing object to the resting state from the scanning sensor; wherein the equidistant zone is the area between two adjacent equidistant lines in the landing area, and the equidistant line is an arc formed by points with equal radial distances to the scoring or measurement starting position, and the width of each equidistant zone in the landing area is consistent; According to the change of reflected light intensity in each equidistant zone, the equidistant zone where the first landing point of the thrown object is located is determined; Obtain a preset distance corresponding to the equidistant zone where the first landing point of the projectile is located, and use the preset distance as the projectile throwing distance.

2. A throwing distance measurement method according to claim 1, characterized in that: According to the change of reflected light intensity in each equidistant zone, the equidistant zone where the first landing point of the thrown object is located is determined, including: Determine the projection trajectory of the thrown object during the process from being thrown to being stationary according to the change in the reflected light intensity of each equidistant zone and the first preset rule; According to the projection trajectory of the thrown object and the second preset rule, the equidistant zone where the first landing point of the thrown object is located is determined.

3. A throwing distance measurement method according to claim 2, characterized in that: The first default rule is: If there is a change in reflected light intensity in a certain area of ​​the equidistant band, the projection of the projectile passes through the equidistant band.

4. A throwing distance measurement method according to claim 2, characterized in that: The second preset rule is: The turning point in the projection trajectory of the thrown object, where it changes from far to near and then from near to far, is taken as the first landing point of the thrown object.

5. A throwing distance measuring device, characterized in that: It includes several measuring units and control consoles; The measuring unit is arranged above the central axis of the throwing field. The measuring unit includes a light source and a scanning sensor arranged from top to bottom. The light source and the scanning sensor are both connected to a console. The console adopts the method described in any one of claims 1 to 4 to measure the throwing distance of the projectile.

6. A throwing distance measuring device according to claim 5, characterized in that: The light emitted by the light source is polarized light.

7. A throwing distance measuring device according to claim 5, characterized in that: If there is one measuring unit, the measuring unit is located above the center of the throwing circle.

8. A throwing distance measuring device according to claim 5, characterized in that: If there are multiple measuring units, one of them is located above the center of the throwing circle and the remaining measuring units are located above the landing area.

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