CN114002662A - Throwing distance measuring method and device - Google Patents

Throwing distance measuring method and device Download PDF

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Publication number
CN114002662A
CN114002662A CN202111280171.0A CN202111280171A CN114002662A CN 114002662 A CN114002662 A CN 114002662A CN 202111280171 A CN202111280171 A CN 202111280171A CN 114002662 A CN114002662 A CN 114002662A
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China
Prior art keywords
throwing
equidistant
distance
measuring
throwing object
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CN202111280171.0A
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Chinese (zh)
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毛竹
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Hubei University of Arts and Science
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Hubei University of Arts and Science
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Priority to CN202111280171.0A priority Critical patent/CN114002662A/en
Publication of CN114002662A publication Critical patent/CN114002662A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
    • A63B71/06—Indicating or scoring devices for games or players, or for other sports activities

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Measurement Of Optical Distance (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention discloses a throwing distance measuring method and a device, wherein an equidistant belt where a first floor point of a throwing object is located is determined according to the intensity change of reflected light, a preset distance corresponding to the equidistant belt is used as the throwing distance of the throwing object, a worker does not need to enter the floor area for measurement, the measuring efficiency is high, and potential safety hazards do not exist.

Description

Throwing distance measuring method and device
Technical Field
The invention relates to a throwing distance measuring method and device, and belongs to the field of distance measurement.
Background
Throwing sports are one of main items of track and field sports, such as shot balls, javelins and the like, the throwing distance needs to be measured in a throwing match, the traditional distance measurement method comprises manual tape measurement and laser measurement, but the methods all need workers to enter a floor area for measurement, the measurement efficiency is low, and certain potential safety hazards exist.
Disclosure of Invention
The invention provides a throwing distance measuring method and a throwing distance measuring device, which solve the problems disclosed in the background technology.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a throw distance measurement method comprising:
acquiring the reflected light intensity of each equidistant zone of a falling area in the process of throwing the throwing object out to be static from a scanning sensor; the equidistant bands are areas between two adjacent equidistant lines of the floor area, the equidistant lines are arcs formed by points with equal radial distances from the scoring or measuring initial positions, and the widths of the equidistant bands in the floor area are consistent;
determining the equidistant zone where the first floor point of the throwing object is located according to the change of the intensity of the reflected light of each equidistant zone;
and acquiring a preset distance corresponding to the equidistant zone where the first floor point of the throwing object is located, and taking the preset distance as the throwing distance of the throwing object.
According to each equidistance area reflected light intensity change, confirm the equidistance area that throws the first landing point of thing, include:
determining a projection track of the throwing object in the process of throwing the throwing object to be static according to the intensity change of the reflected light and a first preset rule;
and determining the equidistant zone where the first floor point of the throwing object is located according to the projection track of the throwing object and a second preset rule.
The first preset rule is as follows:
if the reflected light intensity of a certain area of the equidistant belt is changed, the throwing object is projected to pass through the equidistant belt.
The second preset rule is:
and in the projected trajectory of the throwing object, an inflection point which is changed from far to near and then from near to far is used as a first landing point of the throwing object.
A throwing distance measuring device comprises a plurality of measuring units and a control console;
the measuring unit is arranged above a central axis of the throwing field and comprises a light source and a scanning sensor which are sequentially arranged from top to bottom, the light source and the scanning sensor are both connected with the console, and the console adopts a throwing distance measuring method to measure the throwing distance of the throwing object.
The light emitted by the light source is polarized.
If the number of the measuring units is one, the measuring units are positioned above the center of the throwing circle.
If the number of the measuring units is multiple, one measuring unit is positioned above the center of the throwing circle, and the other measuring units are positioned above the floor area.
The invention achieves the following beneficial effects: according to the invention, the equidistant zone where the first floor point of the throwing object is located is determined according to the intensity change of the reflected light, the preset distance corresponding to the equidistant zone is used as the throwing distance of the throwing object, no worker needs to enter the floor area for measurement, the measurement efficiency is high, and no potential safety hazard exists.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic view of a throwing field;
FIG. 3 is a schematic view of a scanning sensor positioned over the center of a throwing circle;
FIG. 4 is a schematic drawing of a shot trajectory;
fig. 5 is a schematic diagram of the scanning sensor located above the landing area.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, a throwing distance measuring method includes the steps of:
step 1, acquiring the reflected light intensity of each equidistant zone of a falling area in the process of throwing a throwing object out to a rest state from a scanning sensor; the equidistant bands are areas between two adjacent equidistant lines of the floor area, the equidistant lines are arcs formed by points with equal radial distances from the scoring or measuring initial positions, and the widths of the equidistant bands in the floor area are consistent;
step 2, determining the equidistant zone where the first floor point of the throwing object is located according to the change of the intensity of the reflected light of each equidistant zone;
and 3, acquiring a preset distance corresponding to the equidistant zone where the first landing point of the throwing object is located, and taking the preset distance as the throwing distance of the throwing object.
According to the method, the equidistant zone where the first floor point of the throwing object is located is determined according to the intensity change of the reflected light, the preset distance corresponding to the equidistant zone is used as the throwing distance of the throwing object, workers do not need to enter the floor of the floor area for measurement, the measurement efficiency is high, and potential safety hazards do not exist.
The method can be applied to various throwing games, and is further explained by using a shot, as shown in fig. 2, a throwing field consists of a throwing circle, a limiting line, a toe-resisting plate and a floor area, a plurality of equidistant lines are arranged in the floor area for the convenience of measurement, the equidistant lines are arc lines formed by points with equal radial distances to the toe-resisting plate (namely a scoring or measuring starting position), a radial line is arranged from a point A to the center O of the throwing circle, an intersection point D exists between the radial line and the toe-resisting plate, the distance between AD is defined as L, and the points and A are on the same equidistant line in all the radial lines of the throwing field as long as the radial distance to the toe-resisting plate is L. If A is the first drop point of the shot, AD is the result of the shot throwing.
The equidistant lines are not real-time drawn lines but virtual lines, the area between adjacent equidistant lines in the floor area is defined as equidistant bands, the width of each equidistant band is determined according to the actual situation and is generally 1cm, each equidistant band corresponds to a distance, for example, the corresponding distance between the equidistant line of 100cm and the equidistant band of 101cm is 100cm, as long as the first falling point of the shot falls in the equidistant band, the throwing distance of the shot is consistent with the corresponding distance of the equidistant bands.
As shown in fig. 3, in order to facilitate the scanning sensor to obtain the intensity of the reflected light, a light source (a in the figure) is generally disposed above the scanning sensor (B in the figure), the emitted light may be visible light of various colors, or invisible infrared or ultraviolet light, but in order to avoid interference of ambient light, the light emitted by the light source may be polarized light formed by visible light, infrared or ultraviolet light, the light wave forms diffuse reflection on the surface of the shot, and the reflected light is sensed by a scanning sensor located at a lower position, so as to implement real-time scanning of the shot.
In the process from the shot throwing to the static process, the shot can influence reflected light, the intensity of the reflected light is obtained from the scanning sensor, if the intensity of the reflected light changes in a certain area of the equidistant zone, the shot projection is judged to pass through the equidistant zone, and therefore based on the rule, the shot projection track in the process from the shot throwing to the static process can be determined according to the intensity change of the reflected light of each equidistant zone.
As shown in fig. 4, the projection of a shot from shot to rest can have an effect on the ground light. In the figure, a is a light source, B is a scanning sensor, and the shot flying process is abcde line, and the corresponding projection is a ' B ' c'd ' e ' line. As can be seen from the figure, the projected trajectory is from near to far (a 'to b'), and from far to near (c 'to d' to e '), when the shot is located at the e position, e and e' are almost coincident, and the position is the result of the throwing. However, in actual throwing, the shot is stationary after it cannot land, and rolls forward under the action of inertia, so that the projection of the shot is from near to far.
Based on the analysis, the inflection point of the shot projection trajectory, which is changed from far to near and then from near to far, can be used as the first landing point of the shot, so that the deviation caused by rolling is avoided.
And determining an equidistant zone where the falling point is located after determining the first landing point of the shot, and taking a preset distance corresponding to the equidistant zone as a shot throwing distance.
The device for measuring the distance, namely the throwing distance measuring device, comprises a plurality of measuring units and a control console.
The measuring unit is erected above a central axis of the throwing field and comprises a light source and a scanning sensor which are sequentially arranged from top to bottom, the light source and the scanning sensor are both connected with a console, the console adopts a throwing distance measuring method to measure the throwing distance of a throwing object, the console is provided with a display, and the display can display a distance measuring result.
The number of the measuring units is determined according to the length of the field, a common scanning sensor on the market can scan 2000 equidistant bands at most, namely the range of 20m, if the floor area is smaller than 20m, one measuring unit can be adopted, the measuring unit can be erected above the center O of the throwing circle as shown in fig. 3, if the floor area is larger than 20m, only one measuring unit is adopted, the light intensity of the farthest equidistant band is weak, the scanning sensitivity can be high, and under the condition of not using a high-power laser, the sensitivity of the scanning sensor can not realize high-precision resolution and analysis at present.
It is thus possible to erect a plurality of measuring units above the central axis, one of which is located above the centre O of the throwing circle and the remaining of which are located above the ground, as shown in fig. 5, for example by placing the measuring unit five meters from the centre of the throwing circle (a in the figure)5As a light source, B5For scanning the sensor), the inverse of each equidistant band is acquired by a plurality of measuring unitsThe emitted light intensity is measured by each group of measuring units only in a short distance, and the change of light signals in the equidistant bands can be accurately measured.
Based on the same technical solution, the present application also discloses a computer-readable storage medium storing one or more programs, the one or more programs including instructions, which when executed by a computing device, cause the computing device to perform a throwing distance measuring method.
Based on the same technical solution, the present application also discloses a computing device comprising 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 configured to be executed by the one or more processors, the one or more programs comprising instructions for performing a thrown distance measurement method.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.

Claims (8)

1. A throwing distance measuring method comprising:
acquiring the reflected light intensity of each equidistant zone of a falling area in the process of throwing the throwing object out to be static from a scanning sensor; the equidistant bands are areas between two adjacent equidistant lines of the floor area, the equidistant lines are arcs formed by points with equal radial distances from the scoring or measuring initial positions, and the widths of the equidistant bands in the floor area are consistent;
determining the equidistant zone where the first floor point of the throwing object is located according to the change of the intensity of the reflected light of each equidistant zone;
and acquiring a preset distance corresponding to the equidistant zone where the first floor point of the throwing object is located, and taking the preset distance as the throwing distance of the throwing object.
2. A method of measuring a throwing distance according to claim 1, wherein the determining of the equidistant zone in which the first landing point of the throwing object is located based on the change in the intensity of the reflected light from each of the equidistant zones comprises:
determining a projection track of the throwing object in the process of throwing the throwing object to be static according to the change of the intensity of the reflected light of each equidistant band and a first preset rule;
and determining the equidistant zone where the first floor point of the throwing object is located according to the projection track of the throwing object and a second preset rule.
3. A throwing distance measuring method according to claim 2, wherein the first predetermined rule is:
if the reflected light intensity of a certain area of the equidistant belt is changed, the throwing object is projected to pass through the equidistant belt.
4. A throwing distance measuring method according to claim 2, wherein the second predetermined rule is:
and in the projected trajectory of the throwing object, an inflection point which is changed from far to near and then from near to far is used as a first landing point of the throwing object.
5. A throwing distance measuring device is characterized by comprising a plurality of measuring units and a control console;
the measuring unit is arranged above a central axis of a throwing field, the measuring unit comprises a light source and a scanning sensor which are arranged from top to bottom, the light source and the scanning sensor are both connected with a control console, and the control console adopts the method of any one of claims 1 to 4 to measure the throwing distance of a throwing object.
6. A thrown distance measuring device according to claim 5, characterized in that the light emitted from the light source is polarized light.
7. A throwing distance measuring apparatus according to claim 5, wherein if the measuring unit is one, the measuring unit is located above the center of the throwing circle.
8. A throwing distance measuring apparatus according to claim 5, wherein if there are a plurality of measuring units, one of the measuring units is located above the center of the throwing circle and the remaining measuring units are located above the ground area.
CN202111280171.0A 2021-11-01 2021-11-01 Throwing distance measuring method and device Pending CN114002662A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111280171.0A CN114002662A (en) 2021-11-01 2021-11-01 Throwing distance measuring method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111280171.0A CN114002662A (en) 2021-11-01 2021-11-01 Throwing distance measuring method and device

Publications (1)

Publication Number Publication Date
CN114002662A true CN114002662A (en) 2022-02-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111280171.0A Pending CN114002662A (en) 2021-11-01 2021-11-01 Throwing distance measuring method and device

Country Status (1)

Country Link
CN (1) CN114002662A (en)

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