CN114964587A - Method and device for collecting sole pressure of skier - Google Patents
Method and device for collecting sole pressure of skier Download PDFInfo
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Abstract
The invention relates to the technical field of skiing equipment, in particular to a method and a device for collecting sole pressure of a skier, wherein the method for collecting sole pressure of the skier comprises the following steps: building a UWB network which can cover a snow field with communication signals; acquiring motion position data of a skier and pressure data of two feet of the skier on the ground in real time; obtaining a motion trail to form a motion trail model according to the collected motion position data; bringing the collected pressure data into a motion trail model to obtain a pressure data set of each node on the motion trail; obtaining a pressure change difference value by comparing the pressure data set with a reference value in a preset database, and giving a training suggestion according to the pressure change difference value; the positioning module of the embodiment acquires the motion position data of a skier in real time and the pressure data of the two feet of the skier on the ground in real time through a UWB positioning technology; the positioning accuracy is higher than the positioning data obtained by a GPS positioning mode.
Description
Technical Field
The invention relates to the technical field of skiing equipment, in particular to a method and a device for collecting sole pressure of a skier.
Background
The country has come out a series of policies and measures for promoting ice and snow sports, and aims to popularize and popularize the ice and snow sports of the whole population, however, newly-added ice and snow sports participants need guidance of a skiing coach urgently, and thus a wide development prospect is provided for the skiing coach system. Aiming at newly added ice and snow sports participants, the current guidance mode is site or video guidance, and the limited number of skiing coaches, the high cost of site guidance and the non-pertinence of video guidance become factors which hinder the skiing beginners from improving skiing skills.
The prior art proposes a ski training assistance system comprising a host, a display, a plurality of cameras, a ski simulator, which collects pressure data during the exercise process by means of a ski pole simulator held in the human hand, but does not collect pressure data of the skier's position and feet during the skiing process. A skiing intelligent assistance system is also provided, and a method for determining the position of a skier by using GPS positioning is provided. The determination of the real-time location of the skier can be achieved by placing a GPS positioning device into the ski device. However, the GPS positioning accuracy is on the meter level, and the error is too large for skiers moving at high speed, so that accurate positioning cannot be realized. Moreover, the system is not provided with a pressure detection device, and the pressure data of the feet of the skier in the skiing process cannot be acquired.
In summary, the prior art has the following problems: 1. the current ski field movement position is mainly identified through a GPS positioning mode, the GPS positioning precision is low, and the whole-course accurate identification of the position of a skier is difficult to realize in the large-range high-speed movement process. 2. There is a lack of equipment for real-time collection of the pressure data on the sole of the skiers during exercise.
Disclosure of Invention
The present invention is directed to a method and a device for collecting sole pressure of a skier, so as to solve the above problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for collecting sole pressure of a skier comprises the following steps: building a UWB (Ultra Wide Band) network of which the communication signal can cover the snow field; acquiring motion position data of a skier and pressure data of two feet of the skier on the ground in real time; obtaining a motion trail to form a motion trail model according to the collected motion position data; bringing the collected pressure data into a motion trail model to obtain a pressure data set of each node on the motion trail; and obtaining a pressure change difference value by comparing the pressure data set with a reference value in a preset database, and giving a training suggestion according to the pressure change difference value.
As a further scheme of the invention: the UWB network comprises positioning base stations and positioning labels which are in communication connection with the positioning base stations and are arranged on the ski boots, the positioning base stations are arranged at different positions in a snow field respectively, and the positioning labels can be communicated with at least four positioning base stations in real time.
As a still further scheme of the invention: and in the process of communicating the positioning tag with the positioning base station, acquiring the real-time position of the positioning tag by adopting a two-way ranging algorithm.
As a still further scheme of the invention: the motion trail is received and processed by the singlechip to form a motion trail model with motion trail nodes and variation trend.
As a still further scheme of the invention: the real-time acquisition of the motion position data of the skier and the pressure data of the two feet of the skier on the ground comprises the following steps:
the method comprises the steps that a broadcast signal is sent to a positioning tag through a positioning base station contained in a UWB network, the positioning tag feeds back a received signal after receiving the broadcast signal sent by the positioning base station nearby, and the motion position of a skier is obtained in real time according to the feedback signal received by each positioning base station;
the method comprises the steps of acquiring pressure data of two feet of a skier on the ground in real time through a UWB network, or acquiring the pressure data of the two feet of the skier on the ground in real time through a wireless network, wherein the wireless network adopts one of Bluetooth, a cellular network and near field communication.
As a still further scheme of the invention: the pressure change difference value can also be transmitted to a remote processing center through a wireless communication network, and the remote processing center receives the pressure change difference value and stores the pressure change difference value in a database connected with the remote processing center so that the database can optimize the reference value.
The method for acquiring sole pressure of a skier provided by the embodiment is characterized in that the motion position data of the skier and the pressure data of the two feet of the skier on the ground are acquired in real time through a UWB positioning technology; the positioning precision is higher than that of positioning data acquired in a GPS (global positioning system) positioning mode, and the whole-course accurate identification of the position of a skier can be realized in the large-range high-speed movement process; support is provided for training accurate skiing person movement data required.
Based on the method for collecting sole pressure of a skier, the invention provides a device for collecting sole pressure of a skier, which comprises the following components:
the pressure acquisition module comprises a UWB positioning unit and a pressure sensing unit, and is used for positioning the position of a skier in real time, acquiring the pressure of the installation position of the pressure sensing unit and feeding the pressure back to the information acquisition module;
the information acquisition module comprises a single chip microcomputer, a connecting interface and a power management module, wherein the single chip microcomputer is connected with the pressure acquisition module through the connecting interface, and the power management module provides electric energy; and
and the communication module is in communication connection with the information acquisition module and is used for establishing a communication network between the information acquisition module and the user side.
As a further scheme of the invention: the communication module at least comprises one of a wireless local area network, a 4G network, a 5G network and Bluetooth.
As a further scheme of the invention: the system further comprises an interaction unit, wherein the interaction unit is in wireless connection with the communication module and is used for interaction between the user side and the single chip microcomputer.
Compared with the prior art, the invention has the beneficial effects that: the positioning module is arranged in the ski boot and used for acquiring the motion position data of a skier in real time and acquiring the pressure data of the two feet of the skier on the ground in real time through a UWB positioning technology; the positioning accuracy is higher than the positioning data acquired by a GPS positioning mode, and the whole-process accurate identification of the position of a skier can be realized in the large-range high-speed movement process.
Drawings
FIG. 1 is a schematic flow chart of a method for collecting sole pressure of a skier in an embodiment of the present invention.
FIG. 2 is a schematic view of the process of obtaining the exercise position and the sole pressure data of the skier according to the embodiment of the present invention.
FIG. 3 is a schematic view of the sole pressure collecting device of the skier in the embodiment of the present invention.
Fig. 4 is a schematic diagram of a UWB network in an embodiment of the present invention.
In the figure: 101-a positioning module; 102-a pressure acquisition module; 103-a single chip microcomputer; 104-a power management module; 105-a communication module; 106-user side.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Referring to fig. 1, in an embodiment of the present invention, a method for collecting sole pressure of a skier includes the following steps:
s100, building a UWB network with communication signals capable of covering a snow field, and acquiring motion position data of a skier and pressure data of two feet of the skier on the ground in real time;
s200, obtaining a motion track according to the collected motion position data to form a motion track model;
s300, bringing the collected pressure data into a motion trail model to obtain a pressure data set of each node on the motion trail;
s400, obtaining a pressure change difference value by comparing the pressure data set with a reference value in a preset database, and giving a training suggestion according to the pressure change difference value.
In an implementation scenario, the setting of the UWB network may be adjusted according to the terrain and area conditions of different snow fields, and it is sufficient to implement signal coverage of the snow fields, specifically, the UWB network includes positioning base stations and positioning tags, which are connected to the positioning base stations and are disposed on ski boots, and the plurality of positioning base stations are respectively disposed at different positions in the snow fields, so that the distance between the positioning base stations is sufficient to ensure that the positioning tags can normally communicate with the positioning base stations, and the positioning tags can communicate with four positioning base stations in real time at any time or communicate with more than four positioning base stations, as shown in fig. 4; the positioning tags are arranged in the ski boots, and skiers can receive different positioning base station broadcasts when passing through different positions in a snow field during movement, so that the movement tracks of the positioning tags can be determined according to the change of communication data of all the positioning base stations at different moments, and real-time high-precision positioning is realized;
meanwhile, in the exercise process of a skier, the pressure acquisition module arranged in the ski boot acquires sole pressure data of the skier, the sole pressure data are transmitted outside through a network, the positioning base station and the mobile network transmit intermediate data, the data are checked and displayed through electronic equipment such as a computer and a mobile phone, and the electronic equipment such as the computer and the mobile phone is provided with a special program to process the real-time positioning data of the positioning tag and the sole pressure data of the skier.
In another implementation scenario, in the process of communicating between the positioning tag and the positioning base station, a two-way ranging algorithm is used to obtain the real-time position of the positioning tag, and the positioning can be determined and output with high precision by the two-way ranging algorithm.
In another implementation scenario, the motion trail is received and processed by the single chip microcomputer to form a motion trail model with motion trail nodes and a change trend. The single chip microcomputer is connected with a memory and a power supply through a connecting interface, the power supply supplies power to the single chip microcomputer, and the memory stores programs for processing real-time positioning data of the positioning labels and sole pressure data of skiers.
As shown in fig. 2, in order to improve the safety and reliability of data transmission, the real-time location data of the location tag and the data of sole pressure of the skier can be collected separately; the specific classification is the following cases,
the first condition is as follows:
s110, constructing a UWB network based on a UWB technology according to the terrain and area conditions of the snow field;
s120, obtaining the motion position data of the skier through the real-time communication data of the positioning tag arranged in the ski boot and the UWB network;
s130, collecting pressure data of both feet of a skier on the ground through a pressure sensor arranged in the ski boot, and carrying out real-time data transmission through a UWB network;
the exchange center or the processor receives and processes the motion position data and the sole pressure data to obtain the motion condition of the skier, and a training plan is given according to the motion condition to improve the motion mode and the skiing level of the skier; in addition, the motion condition can be transmitted to a remote place through a mobile network, intermediate data transmission is carried out by the positioning base station and the mobile network, and data is checked and displayed through electronic equipment such as a computer, a mobile phone and the like; and remote teaching is realized. The UWB network simultaneously transmits the motion position data and the plantar pressure data, the data transmission real-time performance is high, the synchronism is strong, and the online teaching and training are facilitated;
case two:
s110', constructing a UWB network based on the UWB technology according to the terrain and area conditions of the snow field:
s120', obtaining the motion position data of the skier through the real-time communication data of the positioning tag arranged in the ski boot and the UWB network;
s130', collecting pressure data of both feet of the skier to the ground through a pressure sensor arranged in the ski boot, and carrying out real-time data transmission through a Bluetooth network or a cellular network. Compared with the first case, the Bluetooth network or the cellular network is arranged to share the transmission task of the UWB network, so that the load of the UWB network can be reduced.
In another embodiment, the real-time acquisition of the movement position data of the skier and the pressure data of the two feet of the skier on the ground comprises the following steps:
the method comprises the steps that a broadcast signal is sent to a positioning tag through a positioning base station contained in a UWB network, the positioning tag feeds back a received signal after receiving the broadcast signal sent by the positioning base station nearby, and the motion position of a skier is obtained in real time according to the feedback signal received by each positioning base station;
the method comprises the steps of acquiring pressure data of two feet of a skier on the ground in real time through a UWB network, or acquiring the pressure data of the two feet of the skier on the ground in real time through a wireless network, wherein the wireless network adopts one of Bluetooth, a cellular network and near field communication.
In another embodiment, the pressure variation difference may be transmitted to a remote processing center via a wireless communication network, and the remote processing center receives the pressure variation difference and stores the pressure variation difference in a database connected to the remote processing center for optimization of the reference value by the database.
According to the method for acquiring the sole pressure of the skier, the motion position data of the skier is acquired in real time through a UWB (ultra wide band) positioning technology, and the pressure data of the two feet of the skier to the ground is acquired in real time; the positioning precision is higher than that obtained by a GPS positioning mode, and the whole-course accurate identification of the position of the skier can be realized in the large-range high-speed movement process; support is provided for accurate movement data required by training.
One embodiment of the present invention provides a sole pressure collecting apparatus for a skier, including:
the pressure acquisition module comprises a UWB positioning unit and a pressure sensing unit 102, and is used for positioning the position of a skier in real time, acquiring the pressure of the installation position of the pressure sensing unit and feeding the pressure back to the information acquisition module;
the information acquisition module comprises a single chip microcomputer, a connection interface and a power management module, wherein the single chip microcomputer is connected with the pressure acquisition module through the connection interface, and the power management module provides electric energy; and
and the communication module is in communication connection with the information acquisition module and is used for establishing a communication network between the information acquisition module and the user side.
Specifically, as shown in fig. 3, the UWB positioning unit is a positioning module 101 composed of a positioning tag and a positioning base station, where the positioning tag is a UWB positioning chip (DW1000), the information obtaining module includes a single chip microcomputer 103 (STM32) and a power management module 104, the single chip microcomputer is connected to a communication module 105(HC-06), and the power management module 104 includes a power management chip and a lithium battery. The UWB positioning unit transmits the positioning data to the single chip microcomputer, data acquisition and processing are carried out through the single chip microcomputer, distance data between the positioning label and the positioning base station are generated, and then the data are sent to the user side 106 through the communication module, namely the mobile phone and the upper computer, and the current position information of a skier can be checked on the mobile phone and the upper computer. The power management module 104 adopts an LM2576 chip (capable of realizing conversion from 24V to 5V) and an AMS1117 chip (capable of converting 5V into 3.3V) to ensure the normal work of an STM32 singlechip (3.3V), a DW1000 positioning chip (3.3V) and a communication module HC-06 (3.3V);
the pressure sensing unit 102 comprises a pressure sensor and a data processing unit, the pressure sensor is a flexible film pressure sensor with model number of ZNX-01, and the data processing unit comprises: STM32 singlechip, AD conversion module (the model is ADC0809), power management module (LM2576 and ASM 1117).
The flexible film pressure sensor is embedded in the ski boot, the output point of the flexible film pressure sensor is connected with the input end of the AD conversion module, and the output end of the AD conversion module is connected with the data input end of the STM32 single chip microcomputer. The power management module adopts LM2576 and ASM1117, can provide 3.3V power for the STM32 singlechip, provides outside positive and negative reference potential 5V and 0V for AD conversion module, improves the precision of AD conversion.
In one scene, the positioning module and the pressure sensor module are integrated into a whole to form the pressure acquisition module and are arranged in the ski boot, data transmission is not required to be carried out respectively, and the data transmission flow is simplified.
Further, the communication module at least comprises one of a wireless local area network, a 4G network, a 5G network and bluetooth.
In one scenario of this embodiment, the system further comprises an interaction unit, wherein the interaction unit is wirelessly connected with the communication module and used for interaction between the user side and the single chip microcomputer. The interaction unit adopts a display, the display graphically displays the skiing sport data, and the display can be used for drawing graphics and inputting documents to generate a skiing training plan.
The positioning module is arranged in the ski boot, and acquires the motion position data of a skier in real time and the pressure data of the two feet of the skier on the ground in real time through the UWB positioning technology; compared with the positioning precision obtained by a GPS positioning mode, the positioning precision is higher, and the whole-course accurate identification of the position of a skier can be realized in the large-range high-speed movement process.
The working principle of the invention is as follows: the motion position of the skier is accurately positioned through UWB positioning (the positioning precision can reach 10 cm). According to the terrain and area conditions of a snow field, a proper number of positioning base stations are set, so that the distance between the positioning base stations is enough to ensure that the positioning tags in the ski boots can normally communicate with the positioning base stations (the positioning tags can simultaneously realize normal communication with the four positioning base stations at any moment), the positions of the positioning tags are solved by adopting a Two Way Ranging (TWR) algorithm, and the time delay is low and the precision is high; and the pressure acquisition module is used for acquiring real-time pressure data of the feet of a skier in the skiing process.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (9)
1. A method for collecting sole pressure of a skier is characterized by comprising the following steps:
building a UWB network which can cover a snow field with communication signals;
acquiring motion position data of a skier and pressure data of two feet of the skier on the ground in real time;
obtaining a motion trail to form a motion trail model according to the collected motion position data;
bringing the collected pressure data into a motion trail model to obtain a pressure data set of each node on the motion trail;
and obtaining a pressure change difference value by comparing the pressure data set with a reference value in a preset database, and giving a training suggestion according to the pressure change difference value.
2. The method as claimed in claim 1, wherein the UWB network comprises a plurality of positioning base stations and a plurality of positioning tags connected to the positioning base stations and disposed on the ski boots, the plurality of positioning base stations are disposed at different positions in the snow field, and the plurality of positioning tags can communicate with at least four positioning base stations in real time.
3. The method as claimed in claim 2, wherein a two-way ranging algorithm is used to obtain the real-time position of the positioning tag during the communication between the positioning tag and the positioning base station.
4. The method for collecting sole pressure of a skier according to claim 1 or 2, characterized in that the movement locus is received and processed by a single chip to form a movement locus model with movement locus nodes and variation trends.
5. The method for collecting sole pressure of a skier as claimed in claim 2, wherein said real-time obtaining of the exercise position data of the skier and the pressure data of the skier's feet on the ground comprises the following steps:
the method comprises the steps that a broadcast signal is sent to a positioning tag through a positioning base station contained in a UWB network, the positioning tag feeds back a received signal after receiving the broadcast signal sent by the positioning base station nearby, and the motion position of a skier is obtained in real time according to the feedback signal received by each positioning base station;
and acquiring the pressure data of the two feet of the skier on the ground in real time through a UWB network, or acquiring the pressure data of the two feet of the skier on the ground in real time through a wireless network.
6. The method as claimed in claim 1, wherein the pressure variation difference is transmitted to a remote processing center via a wireless communication network, and the remote processing center receives the pressure variation difference and stores the pressure variation difference in a database connected to the remote processing center for the database to optimize the reference value.
7. A skier plantar pressure collection device, comprising:
the pressure acquisition module comprises a UWB positioning unit and a pressure sensing unit, and is used for positioning the position of a skier in real time, acquiring the pressure of the installation position of the pressure sensing unit and feeding the pressure back to the information acquisition module;
the information acquisition module comprises a single chip microcomputer, a connection interface and a power management module, wherein the single chip microcomputer is connected with the pressure acquisition module through the connection interface, and the power management module provides electric energy; and
and the communication module is in communication connection with the information acquisition module and is used for establishing a communication network between the information acquisition module and the user side.
8. The device as claimed in claim 7, wherein the communication module comprises at least one of a wireless lan, a 4G network, a 5G network and bluetooth.
9. The device for collecting plantar pressure of a skier according to claim 7, further comprising an interaction unit, wherein the interaction unit is wirelessly connected with the communication module and used for interaction between the user side and the single chip microcomputer.
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| CN114011037A (en) * | 2021-11-05 | 2022-02-08 | 王晓勇 | Skiing data analysis inductor |
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