CN213491920U - Sports training speed measurement analysis system based on UWB positioning technology - Google Patents
Sports training speed measurement analysis system based on UWB positioning technology Download PDFInfo
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- CN213491920U CN213491920U CN202021455744.XU CN202021455744U CN213491920U CN 213491920 U CN213491920 U CN 213491920U CN 202021455744 U CN202021455744 U CN 202021455744U CN 213491920 U CN213491920 U CN 213491920U
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Abstract
The utility model discloses a sports training speed measurement analysis system based on UWB positioning technology, which comprises a plurality of signal transmitting terminals, a signal receiving terminal and an upper computer; the signal transmitting end comprises a signal transmitting unit, a transmitting end control unit, a transmitting end reset button, a transmitting end indicator light and a fuse; the signal receiving end comprises a signal receiving unit, a receiving end control unit, a data storage unit, a receiving end reset button, a receiving end indicator light, a display unit, a communication interface and a fuse; a plurality of signal transmitting terminals transmit own numbering information outwards in a fixed period; the signal receiving end adopts the TOA technology to obtain the distance between the signal transmitting ends corresponding to the serial number information, stores the distance to the data storage unit, transmits the data to the upper computer, and the upper computer analyzes the speed-time of each athlete. The parameters of the motion, whether the motion is a curve or a straight line, can be better reflected.
Description
Technical Field
The utility model relates to a human moving speed measures technical field, especially relates to a sports training analysis system that tests speed based on UWB location technology.
Background
Speed is one of the very important biomechanical parameters in sports, and plays an important role in diagnosis of sports technology and control of training intensity. The motion speed measuring system is born due to the assistance effect on the coach.
At present, the sports speed measurement in the world is mainly based on a photogrammetric method, a sectional timing measurement method and a laser measurement method.
The photogrammetric method comprises the following steps: the method is the most commonly used measuring method for motion biomechanics, can measure the three-dimensional motion speed of a moving object, and is mainly used by biomechanics workers at present by a camera shooting measuring method. The general analytical steps of this method are: firstly, determining whether to use one camera for fixed-point or scanning two-dimensional analysis or a plurality of cameras for three-dimensional analysis according to the characteristics of motion, and calibrating a motion plane or a three-dimensional space; then, the motion video analysis system is used for analyzing the researched point to obtain image coordinates, and the spatial coordinates and the speed of the point are obtained through necessary data conversion and processing. The method can be applied to most of movement speed measurement, but the data processing time is long, although some movement video analysis systems (such as SIMI movement video analysis systems) have the function of automatic tracking and analyzing of the mark points, the time required by analysis is greatly shortened, the instant feedback of the speed measurement result can not be realized, the equipment cost is over hundreds of thousands of euros, and the method can not be suitable for the requirements of ordinary training and small league.
The subsection timing measurement method comprises the following steps: the time taken for the moving object to pass a certain distance is measured, and then the velocity (or rather the average velocity) is calculated from the relationship between the velocity, the time and the distance. The HY-A type intelligent digital segmented velocimeter currently used by some domestic units is designed by applying a segmented timing measurement principle. It is composed of several pairs of infrared light reflection and receiver, computer and power supply, and its time-measuring accuracy is 10 ms. In practical application, at least two pairs of infrared light emitting and receiving devices are used to measure the time when a moving object passes a certain distance. When the infrared light emitted by the emitter is blocked by the moving object and the receiver cannot receive the infrared light signal, the start or stop timer is triggered to measure the time. The use of more than two pairs of infrared light reflection and receivers allows the time for a moving object to pass through a plurality of determined distances to be measured. And the average speed of the object passing through each distance segment can be calculated. The velocimeter is convenient to use and can feed back the measurement result immediately. However, since the measured speed is an average speed, detailed movement of the moving object cannot be fully reflected.
Laser measuring method: the laser measuring method of the speed is to measure and record the displacement of the moving object, and the speed of the moving object is calculated through data processing. The German LA VEG-sports speed measuring system is a laser speed measuring system, which consists of a laser transmitting and receiving unit, a computer, data acquisition and processing software and a power supply. The speed measurement principle of the LA VEG-sports laser speed measurement system is that distance and time are measured according to laser pulses (with the wavelength of 904nm, the pulse length of 20ns and the pulse difference of 3mrad) emitted by a laser semiconductor diode. During measurement, a reflecting device is not used, laser beams are diffusely reflected after striking the sportsman, and are recorded by a laser detection diode in the LA VEG-sports laser speed measurement system. The speed parameter is calculated by a microcontroller from each distance measurement and from the data of a high precision quartz timer. However, due to the linear propagation characteristic of laser, the laser velocimeter is mainly applied to the speed measurement of a linear moving object, and cannot measure the speed on a curve or a curve.
SUMMERY OF THE UTILITY MODEL
Not enough to above-mentioned prior art, the utility model provides a sports training analysis system that tests speed based on UWB location technique. Nowadays, Ultra Wide-Band (UWB) UWB positioning is a new wireless communication technology. UWB positioning has the following features: 1. wireless synchronization is used between the positioning base stations, so that the construction cost is reduced; 2. the network is simple, the deployment planning cost is extremely low, and the self-recovery capability is strong; 3. and multiple base station positioning modes can be selected, and the shortest time of the positioning label endurance exceeds one month. The system has an electric quantity monitoring function, and can prompt charging in time when the electric quantity of the positioning base station is insufficient; 4. the terminal displays the position information in real time, realizes the navigation function and has infinite capacity; 5. remote location tracking may be achieved through a mobile communication network. The technology adopts TDOA (time difference of arrival principle), and utilizes UWB technology to measure the time difference of the propagation of radio signals between a positioning tag and two different positioning base stations, thereby obtaining the distance difference of the positioning tag relative to four groups of positioning base stations.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
sports training analysis system that tests speed based on UWB location technique includes: the system comprises a plurality of signal transmitting terminals, a plurality of signal receiving terminals and an upper computer;
the signal transmitting end comprises a signal transmitting unit, a transmitting end control unit, a transmitting end reset button, a transmitting end indicator light and a fuse;
the signal receiving end comprises a signal receiving unit, a receiving end control unit, a data storage unit, a receiving end reset button, a receiving end indicator light, a display unit, a communication interface and a fuse;
the signal transmitting ends are arranged on the body of the athlete at a fixed height h0The number information of the user is transmitted outwards in a fixed period; the timing of the signal receiving end and the signal transmitting end is synchronous, the number information transmitted by the signal transmitting end is received, the distance between the signal receiving end and the signal transmitting end corresponding to the number information is obtained by adopting the TOA technology, the distance is stored in the data storage unit, the data is transmitted to the upper computer through the signal transmission line, and the upper computer analyzes the speed-time of each athlete.
The signal transmitting end also comprises a round-angle cuboid-shaped shell, a round button is arranged on the outer surface of the shell and is nested with the transmitting end reset button, and switching of the on-off state of the transmitting end is achieved.
The cuboid shell is made of non-insulating materials.
The shell of cuboid shape still opens the aperture that supplies transmitting terminal pilot lamp to expose, transmitting terminal pilot lamp exposes from the aperture, and the pilot lamp colour is green when signal emission unit normal work, and the pilot lamp is red when breaking down no longer transmitting signal.
The signal receiving end also comprises a gun-shaped shell, the display unit is embedded on the front surface of the gun-shaped shell, and 6 keys are arranged below the display unit and are respectively a call menu bar key, a determination key, a cancel/stop key, an up-flip key, a down-flip key and a start-up key.
The signal receiving end periodically records and stores signals transmitted by more than 1 signal transmitting end in the state of starting speed measurement until the speed measurement is stopped; in the non-speed measuring state, the data stored in the past can be retrieved through the options in the menu bar and displayed on the display unit.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
1. the utility model provides a sports training analysis system that tests speed based on UWB location technique, record the motion trail of crooked straight line to real-time feedback moving object's displacement, speed and acceleration, also can establish V-t, a-t curve analysis bulk motion state; the system is suitable for middle-short distance running needing curvilinear motion, fills the gap of a speed measuring system for middle-distance curvilinear running at the present stage, has low price and is suitable for training or low-cost competition.
2. The utility model discloses broken the main measuring mode who takes photogrammetry, segmentation timing measuring method, laser survey method as the main of motion project, measured the speed in the motion, introduced brand-new UWB location system of testing the speed.
3. The utility model discloses can be comparatively good reflect the motion no matter be the curve or sharp each item parameter.
4. The utility model has the advantages of small, that data exchange speed is fast, simultaneously because it is with low costs, can acquire the advantage in the competition of the same kind. And the interface is relatively simple, so that the user can conveniently adjust the system according to special requirements.
Drawings
Fig. 1 is a schematic structural diagram of a physical training speed measurement analysis system based on UWB positioning technology in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a signal transmitting terminal in an embodiment of the present invention;
fig. 3 is a schematic connection diagram of each unit in the signal transmitting terminal according to the embodiment of the present invention;
fig. 4 is a front view of a signal receiving end in an embodiment of the present invention;
fig. 5 is a left side view of fig. 4 in an embodiment of the present invention;
fig. 6 is a schematic connection diagram of each unit in the signal receiving end according to an embodiment of the present invention.
FIG. 7 is a graph of distance versus time for an athlete in an embodiment of the present invention;
fig. 8 is a speed-time curve of fig. 7 in an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1, in this embodiment, an athlete performs a 250m sprint for example, and the sports training speed measurement analysis system based on the UWB positioning technology is used to monitor the sports situation of the athlete.
Sports training analysis system that tests speed based on UWB location technique includes: the system comprises a plurality of signal transmitting terminals, a plurality of signal receiving terminals and an upper computer;
the signal transmitting end comprises a signal transmitting unit, a transmitting end control unit, a transmitting end reset button, a transmitting end indicator light and a fuse, and the connection relationship is shown in fig. 3;
in this embodiment, a signal transmitting unit selects a DWM1000 ultra wide band transceiver chip, a transmitting end control unit selects an STM32F103C8T6 system board with the highest main frequency of 72MHz, and a transmitting end indicator lamp selects an LED lamp.
The signal receiving end comprises a signal receiving unit, a receiving end control unit, a data storage unit, a receiving end reset button, a receiving end indicator light, a display unit, a communication interface and a fuse, and the connection relationship is shown in fig. 6;
in this embodiment signal receiving element chooses for use DWM1000 ultra wide band transceiver chip, receiving terminal control unit chooses for use the STM32F103C8T6 system board that the highest dominant frequency is 72MHz, the LED lamp is chooseed for use to the receiving terminal pilot lamp, the LCD screen is chooseed for use to the display element, the serial ports is chooseed for use to the communication interface, carry out serial communication through Stlink V2 connecting wire and host computer, upload the data of storing in the signal receiving terminal in order to supply follow-up speed of establishing, the needs of acceleration image. In this embodiment, the signal receiving end further includes an SWD download port.
The signal transmitting ends are arranged on the body of the athlete at a fixed height h0The number information of the user is transmitted outwards in a fixed period; the plurality of signal receiving ends and the signal transmitting ends are synchronous in timing, the number information transmitted by the signal transmitting ends is received, the distances between the signal receiving ends and the signal transmitting ends corresponding to the number information are obtained by adopting the TOA technology, the distances are stored in the data storage unit, the data are transmitted to the upper computer through the signal transmission line, and the upper computer analyzes the speed-time of each athlete.
In this embodiment, the fixed transmission period of the signal transmitting end is 0.2s, the signal receiving end is held by a measurer, and the height h of the signal transmitting end is kept as much as possible by the hand-held height0Consistent or close to reduce unnecessary errors.
The signal transmitting end further comprises a round-corner cuboid-shaped shell, as shown in fig. 2, a round button is arranged on the outer surface of the shell and is nested with the transmitting end reset button, and switching of the on-off state of the transmitting end is achieved.
The length, width and height ratio of the shell in this embodiment is 3: 3: 1, the height is about 1 cm, and the whole body is a smooth white plastic surface without protrusions.
The cuboid shell is made of non-insulating materials.
The shell of cuboid shape still opens the aperture that supplies transmitting terminal pilot lamp to expose, transmitting terminal pilot lamp exposes from the aperture, and the pilot lamp colour is green when signal emission unit normal work, and the pilot lamp is red when breaking down no longer transmitting signal.
In the embodiment, two dry batteries (in a range of 2.3-3.3V) are used as power supply input at the signal transmitting end so as to ensure the normal work of the internal small-sized single chip microcomputer. The signal receiving end adopts a nickel-hydrogen battery as a power supply battery during operation. When the power is supplied to small objects, the nickel-hydrogen battery is a storage battery with good performance. After a long-time work number, the signal receiving end can be charged through a USB switching port line.
The signal receiving end also comprises a gun-shaped shell, as shown in fig. 4, the left view of which is shown in fig. 5, the display unit is embedded on the front surface of the gun-shaped shell, and 6 keys are arranged below the display unit and are respectively a call menu bar key, a confirm key, a cancel/stop key, an up-flip key, a down-flip key and a start-up key.
The signal receiving end periodically records and stores the signal transmitted by the signal transmitting end on the body of the athlete in the state of starting to measure the speed until the speed measurement is stopped; in the non-speed measuring state, the data stored in the past can be retrieved through the options in the menu bar and displayed on the display unit.
In this embodiment, the upper computer analyzes the obtained data by using a stereo analysis geometry method to obtain a distance-time (x-t) image of the athlete during the running process, as shown in fig. 7. By fitting to multicycle data points, which are in 35s with the origin as the origin, a variable speed run is made until near 250 m.
From the above x-t plot, a velocity-time (v-t) image can be derived, as shown in FIG. 8. The athlete makes accelerated motion with reduced acceleration at 0-5 s; reaching a peak velocity plateau of about 8.5-9m/s during 5-25 s; and performing deceleration movement with increased negative acceleration from 25s to the end of measurement until the speed is attenuated to 0.
Claims (6)
1. The utility model provides a sports training analysis system that tests speed based on UWB location technique which characterized in that: the system comprises a plurality of signal transmitting ends, a plurality of signal receiving ends and an upper computer;
the signal transmitting end comprises a signal transmitting unit, a transmitting end control unit, a transmitting end reset button, a transmitting end indicator light and a fuse;
the signal receiving end comprises a signal receiving unit, a receiving end control unit, a data storage unit, a receiving end reset button, a receiving end indicator light, a display unit, a communication interface and a fuse;
the signal transmitting ends are arranged on the body of the athlete at a fixed height h0The number information of the user is transmitted outwards in a fixed period; the timing of the signal receiving end and the signal transmitting end is synchronous, the number information transmitted by the signal transmitting end is received, the distance between the signal receiving end and the signal transmitting end corresponding to the number information is obtained by adopting the TOA technology, the distance is stored in the data storage unit, the data is transmitted to the upper computer through the signal transmission line, and the upper computer analyzes the speed-time of each athlete.
2. The physical training speed measurement analysis system based on UWB positioning technology of claim 1, wherein: the signal transmitting end also comprises a round-angle cuboid-shaped shell, a round button is arranged on the outer surface of the shell and is nested with the transmitting end reset button, and switching of the on-off state of the transmitting end is achieved.
3. The physical training speed analysis system based on UWB positioning technology of claim 2, wherein: the cuboid shell is made of non-insulating materials.
4. A sports training velocimetry system based on UWB location technology as defined in claim 2 or 3, wherein: the shell of cuboid shape still opens the aperture that supplies transmitting terminal pilot lamp to expose, transmitting terminal pilot lamp exposes from the aperture, and the pilot lamp colour is green when signal emission unit normal work, and the pilot lamp is red when breaking down no longer transmitting signal.
5. The physical training speed measurement analysis system based on UWB positioning technology of claim 1, wherein: the signal receiving end also comprises a gun-shaped shell, the display unit is embedded on the front surface of the gun-shaped shell, and 6 keys are arranged below the display unit and are respectively a call menu bar key, a determination key, a cancel/stop key, an up-flip key, a down-flip key and a start-up key.
6. The physical training speed analysis system based on UWB positioning technology of claim 5, wherein: the signal receiving end periodically records and stores signals transmitted by more than 1 signal transmitting end in the state of starting speed measurement until the speed measurement is stopped; in the non-speed measuring state, the data stored in the past can be retrieved through the options in the menu bar and displayed on the display unit.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114669035A (en) * | 2022-03-07 | 2022-06-28 | 湖北文理学院 | Curve dash detection method, straight dash detection method and straight dash detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114669035A (en) * | 2022-03-07 | 2022-06-28 | 湖北文理学院 | Curve dash detection method, straight dash detection method and straight dash detection device |
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