CN113589226B - Method and system for calculating body inclination of athlete - Google Patents
Method and system for calculating body inclination of athlete Download PDFInfo
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- CN113589226B CN113589226B CN202110159901.5A CN202110159901A CN113589226B CN 113589226 B CN113589226 B CN 113589226B CN 202110159901 A CN202110159901 A CN 202110159901A CN 113589226 B CN113589226 B CN 113589226B
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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
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/04—Position of source determined by a plurality of spaced direction-finders
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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
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0247—Determining attitude
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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
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0257—Hybrid positioning
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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
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/06—Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements
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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
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/14—Determining absolute distances from a plurality of spaced points of known location
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
Abstract
The invention relates to a method and a system for calculating body inclination of an athlete, wherein the method is realized based on a Bluetooth AoA real-time positioning system, the Bluetooth AoA real-time positioning system comprises a plurality of Bluetooth positioning labels, a plurality of Bluetooth base stations and a positioning server, and when the athlete stands vertically, the Bluetooth positioning labels of the neck and the feet are positioned in the same vertical line, and the method comprises the following steps: s1, establishing a three-dimensional coordinate system by taking the center of a semicircle of one semicircle type track field as an origin; s2, the Bluetooth base station receives a broadcast signal of the Bluetooth positioning tag at a first frequency, and the positioning server analyzes the position of the Bluetooth positioning tag through the broadcast signal; and S3, when the plane formed by the foot position and the neck position and the origin is vertical to the horizontal plane, defining the included angle between the connecting line of the foot position and the neck position and the ground as the body inclination, and outputting the body inclination.
Description
Technical Field
The invention relates to the field of body inclination, in particular to a method and a system for calculating body inclination of an athlete.
Background
Track and field sports are a type of athletic activity that is a collective term for running and walking on a runway or prescribed road in an athletic field. The track and field sports ground comprises two semicircular parts which are symmetrically arranged left and right, and a linear part formed by connecting the semicircular parts in a linear way. When the athlete passes through the semicircle part, a certain inclined included angle exists between the human body and the ground plane due to the motion speed of the human body and the action of the centripetal force of the human body, the inclined included angle is very important to the athletic performance of the athlete, and the athlete needs to adjust the body inclination according to the speed and other factors of the athlete.
However, since the hands, feet and bodies of the athlete are all in a motion state during the course of the track, the traditional method for obtaining the inclination is to imagine or photograph through a camera, then manually grasp an image frame which can most reflect the inclination of the body, and finally manually measure the inclination and feed back the inclination to the athlete in sequence. The method has low working efficiency, and the image of the moving object can deviate, incline and the like due to the fact that the camera has certain distortion and the like when shooting the moving object, and the reflected data can have larger deviation.
The invention aims to solve the problems in the prior art and designs a method and a system for calculating the body inclination of an athlete.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method and a system for calculating the body inclination of an athlete, which can effectively solve the problems in the prior art.
The technical scheme of the invention is as follows:
the utility model provides a calculation method of sportsman's body gradient, the method is realized based on bluetooth AoA real-time positioning system, bluetooth AoA real-time positioning system contains a plurality of bluetooth location labels and a plurality of bluetooth basic station and positioning server, bluetooth basic station all contains bluetooth antenna array, bluetooth basic station sets up around semicircle portion in semicircle track and field, bluetooth location label sets up respectively in sportsman's neck and foot, and when sportsman stands vertically, neck and foot bluetooth location label is in same vertical line, the method includes the following steps:
s1, establishing a three-dimensional coordinate system by taking the center of a semicircle of one semicircle type track field as an origin;
s2, the Bluetooth base station receives the broadcast signal of the Bluetooth positioning tag at a first frequency, and the positioning server analyzes the position of the Bluetooth positioning tag through the broadcast signal, wherein the position comprises a foot position (X 0 ，Y 0 ，Z 0 ) And neck position (X) 1 ，Y 1 ，Z 1 )；
And S3, when the plane formed by the foot position and the neck position and the origin is vertical to the horizontal plane, defining the included angle between the connecting line of the foot position and the neck position and the ground as the body inclination, and outputting the body inclination.
Further, in step S1, the establishing a three-dimensional coordinate system specifically includes:
s1.1, taking a connecting line of the centers of the semicircular parts of the two semicircular track fields as an X axis;
s1.2, taking the direction vertical to the ground as a Z axis;
s1.3, establishing a three-dimensional rectangular coordinate system.
When (when)And when the foot position and the neck position are judged to be perpendicular to the horizontal plane, wherein the plane is formed by the foot position and the neck position and the origin.
Further, in step S3, the body inclination is defined as A,
further, the Bluetooth base station obtains the broadcast signal intensity of the Bluetooth positioning tag by obtaining the broadcast signal of the Bluetooth positioning tag and extracts the broadcast signal intensity of the Bluetooth positioning tag, and calculates the position information of the Bluetooth positioning tag through an AoA angle position algorithm.
There is further provided a computing system for athlete's body inclination, comprising:
the Bluetooth AoA real-time positioning system comprises two Bluetooth positioning labels and a plurality of Bluetooth base stations, wherein the Bluetooth base stations comprise Bluetooth antenna arrays, the Bluetooth base stations are arranged around the semicircle part of the semicircle type track and field, and the Bluetooth positioning labels are respectively arranged on the neck part and the foot part of an athlete; and
the position acquisition module is used for acquiring the positions of the two Bluetooth positioning tags; and
and the calculation module is used for defining the included angle between the connecting line of the foot position and the neck position and the ground as the body inclination when the plane formed by the foot position and the neck position and the origin is perpendicular to the horizontal plane, and outputting the body inclination.
Further, the positions include foot positions (X 0 ，Y 0 ，Z 0 ) And neck position (X) 1 ，Y 1 ，Z 1 )。
Further, whenAnd when the foot position and the neck position are judged to be perpendicular to the horizontal plane, wherein the plane is formed by the foot position and the neck position and the origin.
Further, when the athlete stands vertically, the bluetooth positioning tags of the neck and the foot are in the same vertical line.
Accordingly, the present invention provides the following effects and/or advantages:
according to the invention, the Bluetooth positioning labels are arranged on the neck and the foot of the athlete, the two Bluetooth positioning labels are positioned in the same vertical line when the athlete stands vertically, the position information of the Bluetooth positioning labels is acquired through the Bluetooth base station, and the application gradient is output under the judging condition that the plane formed by connecting the two Bluetooth positioning labels with the origin is vertical to the horizontal plane, so that the body gradient can be calculated from the continuously-changing gesture most effectively and accurately.
The present invention further determines the time to reflect the inclination of the body at the time when the inclination of the leg is the same as the inclination of the upper body. When (when)The condition that the plane formed by the foot position, the neck position and the origin is perpendicular to the horizontal plane can be judged at the moment, and the condition is converted into the foot through the plane geometric relationshipThe linear relationship between the portion and the neck, which greatly reduces the amount of computation.
The invention further provides a computing system for the body inclination of the athlete, the Bluetooth AoA real-time positioning system comprises two Bluetooth positioning labels and a plurality of Bluetooth base stations, the Bluetooth base stations comprise Bluetooth antenna arrays, the Bluetooth base stations are arranged around the semicircle part of the semicircle track and field, the Bluetooth positioning labels are respectively arranged on the neck part and the foot part of the athlete, the Bluetooth positioning labels are provided with corresponding power supplies and continuously and outwards transmit broadcast signals, through the reasonable arrangement, the position information of the foot part and the neck part of the athlete can be obtained in real time, and the body inclination is obtained through calculation of the computing module.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
Drawings
Fig. 1 is a layout diagram of a bluetooth base station.
Fig. 2 is a schematic layout diagram of a bluetooth positioning tag.
Fig. 3 is a schematic flow chart of calculating a tag position by using AoA.
Fig. 4 is a schematic view of the AoA angle of arrival.
Fig. 5 is a schematic diagram of an AoA angle of arrival algorithm.
Fig. 6 is a model diagram of AOA calculated angle of arrival.
FIG. 7 is a model diagram of an AOA calculated azimuth.
FIG. 8 is a schematic plan view of an athlete with an athletic field.
Fig. 9 is a schematic diagram of the posture of an athlete while running.
Fig. 10 is a schematic flow chart of the method.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The following describes the invention in detail with reference to examples. For the convenience of understanding of those skilled in the art, the structure of the present invention will now be described in further detail with reference to the accompanying drawings:
example 1
The utility model provides a calculation method of sportsman's body inclination, the method is realized based on bluetooth AoA real-time positioning system, referring to fig. 1, bluetooth AoA real-time positioning system contains a plurality of bluetooth location labels and a plurality of bluetooth basic station 1 and positioning server, bluetooth basic station 1 all contains bluetooth antenna array, bluetooth basic station 1 sets up around semicircle portion in semicircle track and field. Specifically, the bluetooth base stations 1 are disposed around the outer diameter and the inner diameter of the semicircle part of the semicircle track and field, and the straight line distance between the adjacent bluetooth base stations 1 is less than 10 meters. The location server is used to provide computing power.
The flow of bluetooth AoA calculation of tag location is described in detail below with reference to fig. 3.
Referring to fig. 4-5, in this embodiment, the bluetooth location tag refers to a bluetooth peripheral device having a broadcasting protocol, which is installed at two positions of the center of tennis ball and the neck of sportsman's coat, while the bluetooth tag will continuously and periodically broadcast to its surroundings, and it will not be connected by other devices. The broadcast signal sent by the Bluetooth positioning tag comprises a routing data packet, wherein the routing data packet comprises information such as the ID of the current tag, the ID of the logic clock synchronization unit and the like. The Bluetooth base station itself comprises a Bluetooth antenna array, and after the system is started, logic clocks are synchronized between all the Bluetooth base stations and the Bluetooth positioning tags. The Bluetooth base station can calculate the positioning data of the Bluetooth tag in real time by acquiring parameters such as signal intensity, arrival angle and the like of the Bluetooth tag in real time. Specifically, in this embodiment, the position of the bluetooth positioning tag is obtained at a frequency of 50-200Hz, and the higher the frequency is, the more abundant the obtained position data of the bluetooth positioning tag is, and smoother data can be provided for subsequent steps, which is not limited herein.
The embodiment uses the bluetooth 5.1 standard specification version to include a direction finding function, and the function is to locate by receiving the broadcast signal of the bluetooth tag through the base station. The direction finding function (Direction Finding Using Bluetooth Low Energy, page 281 of the bluetooth core specification document) includes two direction measurement techniques of an Angle of Arrival (AoA) and an Angle of departure (Angle of Departure, aoD). The system uses AoA angle of arrival technology to achieve positioning of each sub-model in the playground model. The calculation formula for calculating the angle of arrival is: θ=arccoss ((ψλ)/(2ρd)), where d is the distance between antennas, λ electromagnetic wave wavelength, ψ is the phase difference when electromagnetic waves pass through the two antennas. The more evenly distributed the bluetooth base stations around the field, the more accurate the calculated position. In this embodiment, when the bluetooth base station receives the broadcast signal of the bluetooth positioning tag, the signal strength can be calculated through the RSSI value, and the signal strength reflects the distance between the tag and the base station, and the smaller the RSSI value, the farther the distance. The bluetooth base station transmits the specified tag ID, the specified logical clock synchronization unit ID, and other ancillary information (e.g., signal strength values) to the location server. The specific algorithm is described in the bluetooth 5.1 standard specification version and will not be described in detail here.
Specifically, the broadcast signal uniformly propagates to the x, y, z three-dimensional space with the tag as the center of sphere. For noise generated by reflection of a broadcast signal in a room, a bluetooth base station receives a plurality of signals having the same tag ID and synchronization unit ID, but having different RSSI (received signal strength) values. The denoising scheme of the base station is as follows: and reserving the signal with the largest RSSI value, and discarding other signals.
Referring to fig. 6, a bluetooth base station arranged through a planar array calculates an arrival angle of a broadcast signal using a multiple signal classification algorithm (MUSIC) according to a received broadcast signal, and referring to fig. 7, a base station based on a two-bit planar antenna array can calculate an azimuth angle and a pitch angle of a signal. The two angles of azimuth and pitch can determine a straight line starting from the base station, and the locating tag is located on the straight line.
The base station preferably selects a base station near the tag to calculate an azimuth angle and a pitch angle based on an RSSI (received signal strength) value of the signal when receiving the broadcast signal. Specifically, this embodiment further adopts any one of the following two schemes:
scheme one: and the Bluetooth base station automatically discards signals smaller than the RSSI threshold according to the preset RSSI threshold. According to the scheme, the calculation resources can be saved, but a proper threshold value is required to be set according to the field scene, so that at least three Bluetooth base stations are ensured to participate in calculating the azimuth angle and the pitch angle of each positioning signal.
Scheme II: the Bluetooth base station calculates all received broadcast signals, calculates azimuth angle and pitch angle, and transmits the content, two angle values and RSSI value of the signals in the broadcast signal payload field to the positioning server. And the server selects the first 30% of elements to participate in the calculation of the subsequent xyz coordinates according to the RSSI values from large to small, and discards the rest elements.
And finally, the positioning server receives the screened data transmitted by the base stations, and calculates xyz coordinate values of the tags in the competition field model according to coordinate values of each base station in the competition field model coordinate system and azimuth angles and pitch angles of the tags. The positioning server comprehensively considers the results output by two or more base stations, and can obtain more accurate coordinate values by using algorithms such as weighted average and the like.
The method comprises the following steps, with reference to fig. 10:
s1, establishing a three-dimensional coordinate system by taking the center of a semicircle of one semicircle type track field as an origin; the method comprises the following steps: with reference to figure 1 of the drawings,
s1.1, taking a connecting line of the centers of the semicircular parts of the two semicircular track fields as an X axis; for example, the center of the left semicircle is used as the origin, the direction of the center pointing to the right semicircle is defined as the X axis, and the direction vertical to the X axis is defined as the Y axis;
s1.2, taking the direction vertical to the ground as a Z axis;
s1.3, establishing a three-dimensional rectangular coordinate system;
s2, the Bluetooth base station receives the broadcast signal of the Bluetooth positioning tag at a first frequency, and the positioning server analyzes the position of the Bluetooth positioning tag through the broadcast signal, wherein the position comprises a foot position (X 0 ，Y 0 ，Z 0 ) And neck position (X) 1 ，Y 1 ，Z 1 )；
And S3, when the plane formed by the foot position and the neck position and the origin is vertical to the horizontal plane, defining the included angle between the connecting line of the foot position and the neck position and the ground as the body inclination, and outputting the body inclination.
Further, the Bluetooth base station obtains the broadcast signal intensity of the Bluetooth positioning tag by obtaining the broadcast signal of the Bluetooth positioning tag and extracts the broadcast signal intensity of the Bluetooth positioning tag, and calculates the position information of the Bluetooth positioning tag through an AoA angle position algorithm.
Referring to fig. 8-9, in this embodiment, the plane is formed by connecting three points of the foot position, the neck position, and the origin of the three-dimensional coordinate system, and the foot position and the neck position are in a posture that varies with time during running of the human body. For example, when the foot is leaning forward, the foot is on the front side of the neck, and when the foot is straight, the foot is on the back side of the neck, the body inclination can be calculated most effectively and accurately from the changing posture by capturing that the plane formed by the foot position and the neck position are perpendicular to the horizontal plane and calculating the body inclination from the foot position and the neck position at the moment.
Further, the present embodiment is defined whenAnd when the foot position and the neck position are judged to be perpendicular to the horizontal plane, wherein the plane is formed by the foot position and the neck position and the origin. In addition, in this embodiment, the condition that the plane formed by the foot position and the neck position and the origin is perpendicular to the horizontal plane is converted into the line relationship between the foot and the neck through the plane geometric relationship, and the relationship greatly reduces the calculation amount, and only needs to obtain the relationship ∈>The body inclination can be obtained at any time.
Further, in step S3, the body inclination is defined as A,
example two
A computing system for athlete's body inclination, comprising:
the Bluetooth AoA real-time positioning system comprises two Bluetooth positioning tags and a plurality of Bluetooth base stations, wherein the Bluetooth base stations comprise Bluetooth antenna arrays, the Bluetooth base stations are arranged around a semicircular part of a semicircular track field, the Bluetooth positioning tags are respectively arranged on the neck and the foot of a sportsman, and the Bluetooth positioning tags are provided with corresponding power supplies and continuously transmit broadcast signals outwards; and
the position acquisition module is used for acquiring the positions of the two Bluetooth positioning tags; and
and the calculation module is used for defining the included angle between the connecting line of the foot position and the neck position and the ground as the body inclination when the plane formed by the foot position and the neck position and the origin is perpendicular to the horizontal plane, and outputting the body inclination.
Further, the positions include foot positions (X 0 ，Y 0 ，Z 0 ) And neck position (X) 1 ，Y 1 ，Z 1 )。
Further, defineFor leg inclination, define +.>For body inclination, when->And when the foot position and the neck position are judged to be perpendicular to the horizontal plane, wherein the plane is formed by the foot position and the neck position and the origin.
Further, when the athlete stands vertically, the bluetooth positioning tags of the neck and the foot are in the same vertical line.
The working principle of the present embodiment is similar to that described above, and will not be described here again.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. A method for calculating the body inclination of an athlete, which is characterized in that: the method is realized based on a Bluetooth AoA real-time positioning system, the Bluetooth AoA real-time positioning system comprises a plurality of Bluetooth positioning labels, a plurality of Bluetooth base stations and a positioning server, the Bluetooth base stations comprise Bluetooth antenna arrays, the Bluetooth base stations are arranged around a semicircle part of a semicircle track and field, the Bluetooth positioning labels are respectively arranged on the neck and the foot of a sportsman, and when the sportsman stands vertically, the Bluetooth positioning labels of the neck and the foot are in the same vertical line, the method comprises the following steps:
s1, establishing a three-dimensional coordinate system by taking the center of a semicircle of one semicircle type track field as an origin;
s2, the Bluetooth base station receives a broadcast signal of the Bluetooth positioning tag at a first frequency, and the positioning server analyzes the position of the Bluetooth positioning tag through the broadcast signal, wherein the position comprises a foot position (X0, Y0, Z0) and a neck position (X1, Y1, Z1);
and S3, when the plane formed by the foot position and the neck position and the origin is vertical to the horizontal plane, defining the included angle between the connecting line of the foot position and the neck position and the ground as the body inclination, and outputting the body inclination.
2. A method of calculating the body inclination of an athlete as claimed in claim 1, wherein: in step S1, the establishing a three-dimensional coordinate system specifically includes:
s1.1, taking a connecting line of the centers of the semicircular parts of the two semicircular track fields as an X axis;
s1.2, taking the direction vertical to the ground as a Z axis;
s1.3, establishing a three-dimensional rectangular coordinate system.
3. A method of calculating the body inclination of an athlete as claimed in claim 1, wherein:
when (when)And when the foot position and the neck position are judged to be perpendicular to the horizontal plane, wherein the plane is formed by the foot position and the neck position and the origin.
4. A method of calculating the body inclination of an athlete as claimed in claim 1, wherein: in step S3, the body inclination is defined as a,
5. a method of calculating the body inclination of an athlete as claimed in claim 1, wherein: and the Bluetooth base station calculates the position information of the Bluetooth positioning tag through an AoA angle position algorithm by acquiring the broadcast signal of the Bluetooth positioning tag and extracting to obtain the broadcast signal intensity of the Bluetooth positioning tag.
6. A computing system for athlete's body inclination, characterized by: comprising:
the Bluetooth AoA real-time positioning system comprises two Bluetooth positioning labels and a plurality of Bluetooth base stations, wherein the Bluetooth base stations comprise Bluetooth antenna arrays, the circle center of a semicircle part of one semicircle type track and field is used as an origin, a three-dimensional coordinate system is established, the Bluetooth base stations are arranged on the periphery of the semicircle part of the semicircle type track and field, and the Bluetooth positioning labels are respectively arranged on the neck part and the foot part of an athlete;
the position acquisition module is used for acquiring the positions of the two Bluetooth positioning tags;
and the calculation module is used for defining the included angle between the connecting line of the foot position and the neck position and the ground as the body inclination when the plane formed by the foot position and the neck position and the origin is perpendicular to the horizontal plane, and outputting the body inclination.
7. A computing system for athlete's body inclination as recited in claim 6, wherein: the positions include foot positions (X0, Y0, Z0) and neck positions (X1, Y1, Z1).
8. A computing system for athlete's body inclination as recited in claim 7, wherein: when (when)And when the foot position and the neck position are judged to be perpendicular to the horizontal plane, wherein the plane is formed by the foot position and the neck position and the origin.
9. A computing system for athlete's body inclination as recited in claim 6, wherein: when the athlete stands vertically, the Bluetooth positioning labels of the neck and the foot are positioned on the same vertical line.
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