RU2691947C1 - Local system for monitoring location and parameters of movement of athletes and sports equipment - Google Patents

Abstract

FIELD: system for monitoring location.

SUBSTANCE: in the disclosed radio tag system are configured to switch from the radio tag data transmission mode to the RFID tag request and receive mode and comprise the time scales synchronization module, transceivers are configured to switch from the radio tag data transmission mode to the RFID tag request and receive mode and comprise the time scales synchronization module, the computing means are configured to determine the radio waves propagation speed at the predetermined time intervals.

EFFECT: high accuracy of determining location and parameters of movement of athletes and sports equipment.

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Description

The invention relates to the field of sports, and more specifically to the areas of sports equipment and simulators.

A local system for monitoring the location and parameters of movement of athletes and sports equipment can be used during training or competitions of athletes in both individual and team sports to determine the optimality of the trajectories and movement parameters of athletes, including with respect to the trajectories of sports equipment (ball, washers, etc.) regarding the trajectories of the players of the opposing team and players of their team, regarding obstacles and the boundaries of the site, field or track. Also, the system can be used to calculate the cost of energy of an athlete and the effectiveness of movements of an athlete during exercise.

There are various technical solutions in this area and the wider area of local navigation systems.

The basis of the known technical solutions in the field of local navigation systems is the application of methods for determining the location of moving objects using: receivers of signals from global navigation satellite systems (GNSS), lidars, inertial sensors, optical sensors, magnetometric sensors, RFID tags, their sharing, and , a number of other technical solutions.

There are numerous technical solutions based on the use of GNSS signal receivers, for example, published in US patents №6148262, US №6013007, US №5812049, US №5825327, RU №2399400, etc.

Also known is the GPS device for athletes and cyclists Forerunner 50, produced by Garmin International Inc. (USA), which can be used to record the athlete’s speed and distance.

Also known system for skiers, containing a GPS-device that is used to record the trajectory of the athlete and determine the speed of his movement and the distance traveled along the descent (Adrian Wagli and Jan Skaloud Turning Point Trajectory Analysis for Skiers // Inside GNSS, spring 2007, volume 2, number 3).

Also known is the company POLAR (Finland) for team sports “Polar team PRO”, which contains GPS receivers, which are used to record the movement trajectory of team players.

All mentioned and other systems based on the use of GNSS signal receivers have the following disadvantages (Korneev I.L., Egorov V.V. Local navigation systems that supplement GNSS systems // IX International Forum on Satellite Navigation, Moscow, April 22-24 2015): “poor reception of signals in wooded and mountainous areas, in conditions of dense high-rise urban development, as well as inside buildings; the characteristics of accuracy, integrity and availability of GNSS do not fully meet the requirements of some groups of consumers; lack of noise immunity - local interference of low power ... may make it difficult or impossible to make coordinate-temporal determinations from GNSS signals. " These drawbacks limit the use of navigation systems based on the use of GNSS signal receivers for monitoring the location and movement parameters of athletes and sports equipment.

The other technical solutions mentioned above also have disadvantages that limit their use for monitoring the location and movement parameters of athletes and sports equipment. These are such disadvantages as the high cost of equipment and its maintenance (lidars, some types of inertial and optical systems); reduced reliability in sports applications due to the presence of mechanical elements (lidars, some types of inertial and optical systems); the need for initial calibration (lidars, optical and magnetometric systems), which excludes the speed of system deployment at a new training site; the need for periodic adjustments to eliminate the accumulation of errors (inertial systems), which requires an additional source of data on the location and motion parameters of athletes and sports equipment.

Local navigation systems based on the exchange of radio signals between radio nodes with known coordinates and radio nodes, whose location is to be determined, are also widely known. Such systems are mainly used for navigation of vehicles (for example, ships) and UAVs (unmanned aerial vehicles). Examples of such systems are PinPoint (2000 – England), CRS (2000 – USA), UHRS (2014 – CLLIA) difference-distance systems. For monitoring the location and movement parameters of athletes and sports equipment, existing systems are not applicable, including because of the significant size and significant weight of subscriber devices, which does not allow installing them on small-sized sports equipment, or inside the latter, for example, in a hockey puck puck, or in a golf or tennis ball.

Also, local navigation systems based on the exchange of radio signals between radio nodes are known in the field of cellular wireless radio communications and are based on the LBS service (location-based service). For monitoring the location and motion parameters of athletes and sports equipment, such systems are not applicable, since the training ground or track may be located outside the coverage area of cellular networks, as well as due to large positioning errors. In some cases, these errors reach several kilometers.

The technical solution closest to the claimed system is described in application US 20150378002 “Method, device and software product for improving the characteristics of real-time positioning systems using several positioning technologies”, selected as a prototype. In accordance with the prototype, the positioning system, configured to track the movement of the participant inside and outside the observed area, includes:

the label associated with the participant and transmitting the label data,

an associated sensor that transmits the sensor data,

a plurality of receivers receiving tag data and calculating location data based on tag data,

receiving hub designed to obtain location data and sensor position calculation data calculated from the sensor data, and determine the participant’s location based on the location data, if the participant is within the monitored zone, and determine the participant’s position based on the sensor position calculation data, if the participant is outside the monitored zone.

The disadvantage of the prototype is the lack of modules for synchronization of time scales in receivers receiving these tags and in tags. The presence of synchronous time scales would allow to increase the number of simultaneously served tags by reducing the traffic of radio signal exchange and improve the accuracy of label positioning by increasing the number of measurements over the same period of time. The absence of synchronous time scales in the receivers and tags forces the system to determine the location and movement parameters of each of the athletes and sports equipment separately, rather than by general requests, in order to eliminate collisions. This increases traffic and, as a result, reduces the number of location determinations per unit time. That, in turn, increases the error in determining the location and motion parameters of athletes and sports equipment. At the same time, an increase in accuracy can eliminate false testimony about the release of a sports projectile outside the training area or crossing the goal line (“goal”), which is of extreme importance in sports.

Another disadvantage of the prototype is the use of the assumption of constancy and a known value of the propagation velocity of radio waves, in particular, for propagation conditions in the air environment and near the Earth's surface. It is known that the speed of propagation of radio waves in the troposphere is lower than the speed of propagation of radio waves in a vacuum. The magnitude of this speed is influenced by such factors as pressure, temperature, humidity, height above ground level, type of underlying surface, and others. In the worst case, when the action of all the influencing factors is added up, errors can go up to the tenth fractions of a percent. In terms of monitoring the location of athletes, when the distance to the farthest receivers at the boundaries of the site can reach 100 meters or more (for example, when playing football, rugby or hockey), this is unacceptable. As stated above, even a few centimeters of error can lead to an incorrect conclusion that a sports projectile leaves the playing field or that it crosses the goal line.

Another disadvantage of the prototype is the unambiguous and immutable function (lack of multifunctionality) of the radio nodes included in the system (tags and receivers). This means that tags are always functionally tags that are associated with participants and transmit data tags, that is, are always devices whose location must be determined; and the receivers are always receivers that receive these tags and calculate location data based on the tag data, that is, they are always devices whose location, in general, is known. Due to the presence of this drawback, the system does not have the ability to quickly deploy and use on uncalibrated in advance training sites, as well as the additional possibility of using in sports that require positioning of participants in the "swarm" mode.

The disadvantages of the prototype decide the claimed local system for monitoring the location and motion parameters of athletes and sports equipment.

Thus, technical problems that currently exist are problems associated with increased error in determining the location and motion parameters of athletes and sports equipment (due to the fallacy of the assumption of constancy and the known value of the propagation velocity of radio waves, the lack of time synchronization modules in radio nodes) and lack of multi-functionality radio centers. The creation of the proposed technical solution is aimed at solving these technical problems, namely, the creation of a local system for monitoring the location and motion parameters of athletes and sports equipment with improved technical characteristics: increased accuracy in determining the location and movement parameters of sportsmen and sports equipment and using multifunctional radio centers.

The technical result of the proposed solution is to improve the accuracy of determining the location and motion parameters of athletes and sports equipment, thereby eliminating the disadvantages of the known systems.

To achieve a technical result, the proposed local system for monitoring the location and movement parameters of athletes and sports equipment, contains:

- at least one radio tag associated with an athlete or a sports projectile and transmitting radio tag data,

- sensors associated with an athlete or a sports projectile,

- transceivers installed on the boundaries of the observed area, requesting and receiving data tags,

- computational tools designed to obtain location data from transceivers and determine, based on the location data, the position of the athlete or sports equipment.

In this case, RFID tags and transceivers are configured to switch between RFID data transfer mode and RFID data request and receive mode; contain a timeline synchronization module. The computing means are adapted to determine the speed of propagation of radio waves at predetermined time intervals.

Additional differences of the system are:

- use in the composition of the sensors of motion tracking devices, such as three-axis accelerometers, gyroscopes, and magnetometers;

- the use of an RFID identification tag installed on a sports uniform, personal belongings or the athlete's body, and the use of an RFID identification tag as part of a radio tag reader;

- the use of a reference tag, stationary installed at a known distance between the phase centers of the antennas of the reference mark and one of the transceivers of the system;

- use in the structure of transceivers of receivers of signals of the global navigation satellite system.

The essence of the invention is illustrated FIG. 1, which shows the principle of installation of transceivers around the boundaries of the training area, increasing the area of coverage of the training area by adding additional transceivers, the principle of installing a reference tag, where:

1 - transceiver

2 - radio tag

3 - reference tag

4 - training ground

FIG. 2 shows a simplified scheme for constructing a time scale.

The local system for monitoring the location and movement parameters of athletes and sports equipment operates as follows.

To quickly deploy the system at training sites that have not been calibrated in advance with accurate positioning of the points where transceivers 1 are to be installed, transceivers 1 are installed first around the boundaries of the training area. Each of the transceivers 1, in order to determine its position relative to other transceivers, alternately switches to the radio tag data transmission mode. When switching to the radio tag data transmission mode, the transceiver begins to generate and transmit data similar to the radio tag data. Radio tag data includes information about a unique radio tag identifier, a data packet identifier, a numerical value of the time point for sending a data packet, expressed in units of the time scale of a transceiver that has switched to the radio tag data transfer mode, and other data. The transceivers 1, which are not switched to the radio tag data transmission mode, receive the said data and record the times of their reception on their time scale. Each transceiver 1 transmits the received data, the data on the time of their reception, the data on its unique identifier and other data to the computational means, which, based on the transmitted data, calculate the location of the phase center of the antenna of the transceiver 1, switched to the radio tag data transmission mode antenna phase centers of the remaining transceivers 1. After calculating the location of the phase center of the antenna of the transceiver 1, switched to the radio tag data transfer mode, the relative but the phase centers of the antennas other transceivers 1, computing devices transmit transceivers 1, switching to the transmission mode RFID signal to return to the request mode RFID tag and receiving data. Thus, after alternately switching each transceiver 1 to the radio tag data transfer mode, the shape and dimensions of the new training pad 4 are determined without the need for preliminary calibration.

To determine in three coordinates the location of the phase centers of the antennas of each of the transceivers 1 relative to the phase centers of the antennas of other transceivers 1, the number of installed transceivers 1 must be at least four. Also, the multifunctionality (having the ability to switch between the radio tag data transfer mode and the radio tag data request and receive mode) of the transceivers allows you to quickly increase the size of the training pad 4 by adding additional transceivers 1. Also, the multifunctionality allows you to quickly determine the boundaries of the extended training paths in stages adding additional transceivers 1. Also, the multifunctionality allows you to install transceivers 1 in copies and the date place at a predetermined distance from other transceivers 1, not manually by technical means: e.g., radio-controlled self-propelled carriages or other managed quadrocopter delivery vehicles.

In the particular case, for rapid deployment of the system in an open area with good quality of GNSS signals, transceivers 1 can additionally contain GNSS receiver modules.

Communication equipment combining receivers and computing facilities into a single information space uses wireless communication lines (for example, Wi-Fi). In the particular case, cable lines can be used as communication lines, or, in another particular case, a combination of cable and wireless lines. If cable lines are used, the necessary electrical and / or optical cables are laid and connected during the deployment process.

Also, in the process of deploying the system, if necessary, power cables are laid and connected. The transceivers 1 can be equipped with independent power sources. If at the time of the training session there is enough capacity of autonomous power sources built into the transceivers 1, the power cables may not be laid.

Before the start of training and / or competition, radio tags 2 are fixed on athletes, which are associated with a specific athlete in computing tools by entering the appropriate information that matches an athlete and a unique identifier of radio tag 2. In a particular case, the athlete’s personal form or body can be installed RFID tag (RFID tag), and RFID 2 may contain a reader for reading RFID tag data (RFID tag). In this case, the process of associating the athlete and the unique identifier of the radio tag 2 can be automated.

Radio tags 2 can also be installed on sports equipment. In the case when a sports projectile has small dimensions or the installation of a radio tag 2 on it interferes with the conduct of trainings or competitions, the radio tag 2 can be installed inside the sports projectile. This implies the need to manufacture specialized sports equipment with a built-in RFID 2, all of which normalized characteristics (for example, weight, dimensions, etc.) would meet the standards adopted in the sport. Accumulators of such radio tags 2, installed inside a sports projectile, are charged using contactless chargers.

During the training or competition, the system works in working mode. Transceivers 1 and radio tags 2 exchange radio signals in the sequence specified by the algorithm. Using the tools built into the transceivers 1 and radio tags 2, the intervals between the reception and transmission of radio signals are determined, this data is transmitted to the computing means, and the computing means determine the distances between the transceiver 1 and the radio tag 2. Then, using the calculated distance values computational tools determine the location of the radio tag 2 inside the training area.

To determine in three coordinates the location of the phase centers of the antennas of each of the radio tags 2 relative to the phase centers of the antennas of the transceivers 1, the number of transceivers 1 installed must be at least three. Since in the inventive system the minimum number of used transceivers 1 is four (to ensure rapid deployment of the system on uncalibrated sites), this allows you to simultaneously determine the location of each of the radio tags 2 four times and average the results.

In more detail the principle of the system operation in the operating mode is described below.

The appointment of timeslots, the order of the exchange of signals in the system.

To eliminate the imposition of radio signals when they are simultaneously transmitted by different objects in the system, a certain sequence of signal exchange between radio tags 2 and transceivers 1 is assigned. Signal sequence can be assigned using various known algorithms. We give one of the options for the purpose of the exchange sequence.

One of the transceivers 1 with its unique identifier is previously, prior to the start of the training, assigned by means of computational means the leading transceiver. This means that in the course of operation this transceiver will begin radio exchange sessions with other transceivers 1 and radio tags 2, and also that its time scale will be considered as a system time scale. As the transceivers 1 become active after turning on their power, they notify the computational tools about the activation, give their identifier, and wait for the computational tools command to assign them a role in the system. This request, followed by a wait, is made periodically, until transceiver 1 is registered in the system and the role is not assigned to it, or registration is denied. Simultaneously with the assignment of the role (master or slave, as well as which of the slaves in the event of an accident will assume the role of the master), the slave transceiver 1 is assigned the timeslot. Each of the timeslots has a duration that ensures the transmission of the maximum information packet for this system, according to the protocol used, and an additional guard interval, to ensure the transmission and reception of packets that are free from overlays, and to protect against time scale errors, which is important at the beginning of work, when time scales are not yet synchronized.

The assignment of a timeslot for RFID 2 is done as follows: when powering on RFID 2, it listens on the air, determines the moments of pauses between exchanges between other radio labels 2 and transceivers 1 and at these times sends a request for registration in the system. The request contains a unique identifier of RFID 2. Based on the sequence with which they are registered in RFID 2, they are assigned different timeslots. The timeslot assignment command, accompanied by a unique identifier of RFID 2, is given computational tools. Radio Tag 2 confirms the receipt of the command by the occupation of its assigned timeslot. After that, the computational means assign the assigned timeslot to this radio tag 2 until the end of the workout.

Radio communication between transceivers 1 and radio tags 2 is performed by sessions. The radio signal transmission by the master transceiver is a signal for all objects of the system about the beginning of the next exchange session. Further, the time slots allocated to them, counted from the beginning of the exchange session, are transmitted by their led transceivers. In the course of this exchange, for example, the time scales of the slave transceivers are adjusted. Further, in the allocated time slots, counted from the beginning of the exchange session, transmit their information to the radio tag. In one of the possible options, RFID tags will continue to count timeslots and transmit information repeatedly.

Determination of coordinates within the observed area

There are, conventionally, two large groups of algorithms by which the location of a radio tag 2 can be determined. For example, one of the modifications of algorithms based on determining the propagation delay of a radio signal (TOF, Time Of Flight) can be used, which is proportional to the distance between each radio signal transmitters 1 and radio tag 2, or / and the so-called "circular delay" (RTT, Roundtrip Time), which is proportional to twice the distance between each of the transceivers 1 and radio tag 2. Such algorithms are well known in the region of local radionavigation systems (Gogolev A., Ekimov D., Ekimov K., Moschevikin A., Fedorov A., Tsykunov I. Accuracy of determining distances using nanoLoc technology // Wireless Technologies, 2008, №3). When using this method, a large number of transmitted and received radio signals are used to determine the location of each of the tags 2, and taking into account the high dynamic characteristics of the tags 2, limits the number of simultaneously tracked trajectories and movement parameters of athletes and / or sports equipment.

At the same time, the second group of algorithms is also well known, in which the location of RFID 2 can be calculated from the results of measuring the small time difference (TDOA) for receiving the same radio signal from tag 2 by different transceivers 1 (Gustafsson F., Gunnarsson F. Positioning Using the Measurement Measurement // ((Acoustics, Speech, and Signal Processing)), IEEE International Conference, Hong Kong, China, 2003). In this case, the computational tools determine the location of the radio tag 2 by solving systems of nonlinear hyperbolic equations. Also, the presence of synchronized time scales in transceivers 1 is required in order to be able to measure the difference in reception time by different transceivers 1 of a radio signal from radio tag 2, since measurements are made in different places and must be tied to a common time scale.

The presence of time synchronization modules in both transceivers 1 and 2 labels allows the combination of algorithms based on TOF / RTT and TDOA to be used in the inventive system, when a large number of trajectories and motion parameters of athletes and / or sports equipment can be tracked without the need solutions of systems of nonlinear hyperbolic equations.

Simplified, the process of synchronizing time scales and determining the location of radio tags 2 in the inventive system is as follows. To ensure synchronization, one of the transceivers 1 is designated as the master, and the time scales of the other transceivers 1 and all radio tags 2 are synchronized by its radio signals. After receiving radio signals from transceivers 1, the radio tag 2 begins to transmit the radio response group to the assigned radio signals. RFID 2 timeslots. Each radio signal contains the time of sending, as well as a number of other data used to calculate the errors of the time scales. The transceivers 1, receiving each of the radio signals of each of the tags 2, record the time of reception. Thus, in transceiver 1 there is information about both the time of sending a radio signal and the time of its reception, which allows for further calculations, similar to algorithms based on TOF / RTT.

As one example of the implementation of the time scale, FIG. 2 shows a simplified scheme for constructing a time scale. The basic blocks of a simple time-scale variant are a cyclic counter, correction registers, and an adder. All blocks of the time scale operate in a synchronous mode (clocked) to avoid errors during automatic or processor correction of corrections, as well as when summing up the cyclic counter data (DCC) and the data of the correction registers (DRP).

It is obvious that these time scales (LBF) will change in jumps, in accordance with the period of the clocking signal of the cyclic counter.

In the same way, by jumps, the data of the moment of the event (UHF), obtained by the latch, will also change.

The synchronization module of time scales contains, in addition to hardware (time scale, clocking scheme with a generator, etc.), software modules. Below is an example of determining the error of the time scale. The time scale is corrected by software, for example, using the interface, which in FIG. 2 has the designation "Write and Read".

In computing means for calculating distances from tag 2 to transceivers 1 from measured values of TOF propagation delays, information is used about the current value of the propagation velocity of radio waves. If the distances between transceivers 1 are known (the site is calibrated), then the propagation speed of radio waves is calculated from the measurement results of radio propagation delays between transceivers 1 by dividing the distance by the delay. In the particular case, if the training is conducted on a site that has not been calibrated, the system additionally contains a reference RFID 3 permanently installed on a known (measured by measuring means or calculated from known data) distance between the phase centers of the reference RFID antennas 3 and one of transceivers 1 system. In another particular case, one of the transceivers 1 can be used as a reference RFID 3. In this case, this transceiver is installed at a known distance (measured by measuring means, or calculated from known data) between the phase centers of the antennas of this transceiver. -transmitter 1 and one of the remaining transceivers of 1 system.

Computing tools have the ability to determine from the time points of the reception and transmission of radio signals by radio beacons and radio tags also other data necessary for the operation of the system, for example, errors of time scales for correction and synchronization of time scales. For example, take the first transceiver 1 and the second transceiver 1, with the first transceiver 1 being the master. For the second transceiver 1, the time scale error relative to the time scale of the first transceiver 1 can be calculated from the expression:

Where:

γ _i - the error of the time scale of the transceiver 1 relative to the time scale of the leading first transceiver 1;

τ _ij is the propagation delay of radio waves between the phase center of the transmitter antenna of the first transceiver 1 and the phase center of the antenna of the second receiver-transmitter 1;

M _ij - the time of reception by the transceiver j of the radio signal from transceiver i, recorded on the time scale of the transceiver j;

M _i is the time of radio transmission by the transceiver i, recorded on the time scale of transceiver i;

τ _PDi - delay value in the internal electrical circuits of the transmitter and antenna-feeder device of the transceiver i, characterizing at what time interval after fixing by the receiver of the moment of radio signal transmission this radio signal will be transmitted; is the value known, determined during factory calibration of equipment;

τ _PMi is the delay value in the internal electrical circuits of the receiver and the antenna-feeder device of the transceiver i, characterizing at what time interval after receiving a signal from the air, the reception time point will be fixed by the transceiver i; is a known value determined during factory calibration of equipment.

The technical implementation of the calculation of the current value of the propagation velocity of radio waves is based on the following.

The master transceiver transmits a radio signal, fixing the time of transmission. The remaining transceivers receive this radio signal, fixing the time of reception. Then each of the slave transceivers in the allotted time it transmits a radio signal containing both the time of its transmission and the time of reception of the radio signal from the master transceiver.

In the case when the system is deployed at a calibrated site and the distances between transceivers are known, the current value of the propagation velocity of radio waves can be calculated, for example, from data from three transceivers from the following expression:

Where:

c is the current value of the propagation velocity of radio waves;

L _ij is the distance between the phase center of the transmitter antenna of the transceiver i and the phase center of the antenna of the receiver of the transceiver j;

M _ij - the time of reception by the transceiver j of the radio signal from transceiver i, recorded on the time scale of the transceiver j;

T _i - the value of the delay between the time of transmission of the radio signal by the transceiver i and the reception of the same radio signal by the same transceiver; is the value known, determined during factory calibration of equipment; If in a particular transceiver version a single antenna is used for both receiving and transmitting radio signals, this value corresponds to the delay in the internal electrical circuits and receiver antenna device, which characterizes how long the radio signal is transmitted by the transceiver after which the radio signal was transmitted. will be broadcast;

M _i is the time of radio transmission by transceiver i, recorded on the time scale of transceiver i.

Also, the presence of a motion tracking device in the sensor, together with multifunctionality, which ensures that it is possible to switch between the radio tag data transfer mode and the radio tag data request and receive mode, make it possible to implement the system in swarm mode. In this case, the four tags go into the mode of requesting and receiving radio tag data (as transceivers), one of which is selected as the master. They determine their mutual position in the same way as described above, when transceivers determined the size and shape of the training ground during the rapid deployment of the system. Magnetometers are used to determine the position relative to the cardinal points. To determine distances, the last of the radio wave propagation rates calculated by the system is used. In general, the mode of operation of the system resembles the mode of operation with fixed transceivers. However, one of the four tags operating in the mode of requesting and receiving data of the radio tag is alternately switched to the radio tag data transmission mode to determine its current position relative to the other tags. Thus, the mutual arrangement in space of all tags is determined, including those acting as a transceiver. If, as a result of the movement of athletes, radio tags, acting as transceivers, have taken an uncomfortable (for example, crowded) position, a new four mark will be selected to work as transceivers.

Computing facilities (stationary or portable computer, for example: laptop, tablet computer, smartphone) contain installed software that processes and visualizes data received from transceivers about the location of transceivers and radio tags and the motion parameters of radio tags. Computing facilities can receive data not only from transceivers, but also from RFID tags, when the system is operating in swarm mode. In this case, the radio tag, which operates in the mode of requesting and receiving radio tag data and acting as the master transceiver, transmits to the computational facilities the position of the radio tags, functioning as transceivers, and radio tags, and the motion parameters of the radio tags, computational tools; software performs processing and visualization of received data.

Thus, the proposed local system for monitoring the location and movement parameters of athletes and sports equipment has improved technical characteristics in comparison with the known solutions.

Hardware implementation of the main elements of the system

The transceiver contains microcontrollers, autonomous power supply elements, wireless and / or cable data transmission modules for communication with computing facilities, a transceiver and an antenna-feeder device. Additionally, transceivers contain time base sync modules. The functionality of transceivers can be provided on the existing element base. The main components are, for example, the processor STM32F401, production STMicroelectronics, radio SP1ML-868, manufactured STMicroelectronics, slots meter K1897AI1T, production of "Milandr" driver time scales with memory functions, shift and correction K1897AP1T, production of "Milandr" . At the same time, most functional modules of the transceiver can also be implemented as part of a programmable logic integrated circuit (FPGA). As a reference generator for a time base former, for example, a quartz ultra-miniature precision thermostated GK199-TS generator manufactured by Morion JSC can be used. The use of a quartz oscillator as a reference for the time generator is justified, since time synchronization modules function in the radio nodes in the operating mode of the system. The stability characteristics of the GK199-TS generator allow the correction of time scales no more than 1 time in 10 seconds.

Radio tag has a similar functional composition with a transceiver, the difference lies in the algorithm of operation. Radio tag contains microcontrollers, elements of autonomous power supply, transceiver and antenna-feeder device. Additionally, RFID tags contain timescale synchronization modules. The functionality of the tags can be provided on the existing element base. The main components are, for example, the processor STM32F401, production STMicroelectronics, radio SP1ML-868, manufactured STMicroelectronics, slots meter K1897AI1T, production of "Milandr" driver time scales with memory functions, shift and correction K1897AP1T, production of "Milandr" . At the same time, most of the functional modules of the label can also be made as part of a programmable logic integrated circuit (FPGA). As a reference generator for a time base former, for example, a quartz ultra-miniature precision thermostated GK199-TS generator manufactured by Morion JSC can be used.

Claims (12)

1. A local system for monitoring the location and movement parameters of athletes and sports equipment, containing: - at least one radio tag associated with an athlete or a sports projectile and transmitting radio tag data, - sensors associated with an athlete or a sports projectile, - transceivers installed on the boundaries of the observed area, requesting and receiving data tags, - computational tools designed to obtain location data from transceivers and determine, based on the location data, the position of the athlete or sports equipment, wherein the radio tags are configured to switch from the radio tag data transfer mode to the radio tag data request and receive mode and contain a time frame synchronization module, the transceivers are configured to switch the radio tag data transfer mode to the radio tag data query and receive mode and contain the module synchronization of time scales, while the computational tools are arranged to determine the speed of propagation of radio waves at specified intervals. 2. The system of claim. 1, characterized in that the sensor contains an inertial motion tracking device. 3. The system of claim 2, wherein a device comprising a three-axis accelerometer, a gyroscope and a magnetometer is used as an inertial motion tracking device. 4. The system of claim. 1, characterized in that it further comprises means for identifying the athlete, which bind the RFID tag to the athlete’s identification parameters. 5. The system of claim. 4, characterized in that the athlete identification means consist of a radio frequency identification tag mounted on the sport uniform, personal belongings or the athlete's body, and a reader, optionally included in the RFID tag. 6. The system of claim. 1, characterized in that it contains a reference tag, which is permanently installed at a known distance between the phase centers of the antennas of the reference tag and one of the transceivers of the system. 7. The system of claim. 1, characterized in that the transceiver includes receivers of signals of the global navigation satellite system.

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