Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, an object of the present invention is to provide a method for detecting and evaluating shooting performance under competitive pressure, which can provide a better experimental platform and evaluation method for understanding how the brain performs self-regulation under pressure to achieve optimal athletic performance.
Another objective of the present invention is to provide a device for detecting and evaluating shooting performance under competitive pressure.
In order to achieve the above object, an embodiment of the present invention provides a method for detecting and evaluating shooting performance under competitive pressure, including the following steps: collecting physiological signal characteristics in the target shooting process; acquiring shooting scores and aiming tracks; and evaluating shooting performance data of the target according to the physiological signal characteristics, the shooting results and the aiming track.
The shooting performance detection and evaluation method under competitive pressure provided by the embodiment of the invention provides an experimental environment for simulating a real competition scene, collects multidimensional physiological indexes, and evaluates the relationship between the shooting performance and physiological parameters of athletes under a competitive state, so that a better experimental platform and an evaluation method are provided for understanding how the brain performs self-regulation under pressure to achieve optimal sports performance.
In addition, the shooting performance detection and evaluation method under competitive pressure according to the above embodiment of the present invention may further have the following additional technical features:
further, in an embodiment of the present invention, the method further includes: acquiring the current state of the target, wherein the current state comprises an athletic state and a non-athletic state; and correcting the shooting performance data of the target according to the current state.
Further, in an embodiment of the present invention, the method further includes: the aiming track that the muzzle is aligned with the target paper when the shooter aims is detected by a sensor arranged at the tail end of the gun.
Further, in an embodiment of the present invention, the method further includes: and sending the physiological signal characteristics and/or the shooting performance data to a preset terminal.
Further, in one embodiment of the present invention, wherein the physiological signal characteristics include a shooter electrical signal and an electrical cardiac signal.
In order to achieve the above object, another embodiment of the present invention provides a shooting performance detecting and evaluating apparatus under competitive pressure, including: the acquisition module is used for acquiring physiological signal characteristics in the target shooting process; the first acquisition module is used for acquiring shooting scores and aiming tracks; and the evaluation module is used for evaluating shooting performance data of the target according to the physiological signal characteristics, the shooting scores and the aiming track.
The shooting performance detection and evaluation device under competitive pressure provided by the embodiment of the invention provides an experimental environment for simulating a real competition scene, collects multidimensional physiological indexes, and evaluates the relationship between the shooting performance and physiological parameters of athletes under a competitive state, so that a better experimental platform and an evaluation method are provided for understanding how the brain performs self-regulation under pressure to achieve optimal sports performance.
In addition, the shooting performance detection and evaluation device under competitive pressure according to the above embodiment of the present invention may further have the following additional technical features:
further, in an embodiment of the present invention, the method further includes: the second acquisition module is used for acquiring the current state of the target, wherein the current state comprises an athletic state and a non-athletic state; and the correction module is used for correcting the shooting performance data of the target according to the current state.
Further, in an embodiment of the present invention, the method further includes: and the detection module is used for detecting the aiming track of the gunpoint aiming at the target paper when the shooter aims through the sensor arranged at the tail end of the gun.
Further, in an embodiment of the present invention, the method further includes: and the sending module is used for sending the physiological signal characteristics and/or the shooting performance data to a preset terminal.
Further, in one embodiment of the present invention, wherein the physiological signal characteristics include a shooter electrical signal and an electrical cardiac signal.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The invention aims to provide a shooting capability detection means for simulating a real shooting game scene and a shooting capability evaluation method under pressure, which comprise an experiment design under competitive pressure and a physiological information data acquisition method and an evaluation method. In order to fully embody the difference between shooting performance under competitive pressure and a general state, the invention designs two groups of experiments: general state shooting experiments and competitive state shooting experiments. Two groups of experimental shooters simultaneously acquire shooting hand-brain electric signals and electrocardiosignals in the shooting process, and record shooting scores and aiming tracks through a shooting target scoring system. Through physiological signal characteristics, shooting performance difference and cerebral nerve efficiency change in the shooting process under two states are evaluated, and good shooting performance and poor cerebral nerve regulation and control mechanism under stress condition are evaluated.
Design of experiments
Research shows that shooting performance is closely related to the psychological state of shooters, and the shooting performance can be influenced by tension, anxiety and other emotions on the playing field to different degrees. The research aims to explore the change of shooting physiological characteristic parameters (electroencephalogram, electrocardio and score) in competitive and non-competitive states and evaluate the neural regulation mechanism of the brain in different shooting states.
The experiment is carried out in real shooting training hall, has designed two experiments, and competition experiment and non-competition experiment are accomplished in the time quantum of difference respectively, and wherein competition experiment is designed for a match, adopts two liang of antagonism modes, for guaranteeing experiment rigor, and the match list is formulated by coach according to sportsman's shooting score, avoids shooting score difference to influence the competition strong and weak to having set up reward punishment system, inviting coach scene when the experiment is carried out and watching and to two participants notify every rifle score. The non-competitive experiment was a single shooter mission, requiring each participant to set up 60 guns in 75 minutes according to their own rhythm. The participants used their own guns, all in a standing shooting position, and pulled the trigger with the right hand. The experiment requires that each participant exerts normal shooting level, the experiment duration of each participant is 2-2.5 hours, and electroencephalogram and electrocardiosignal are collected in the experiment process.
The following describes a method and an apparatus for detecting and evaluating shooting performance under competitive pressure according to an embodiment of the present invention with reference to the drawings, and first, a method for detecting and evaluating shooting performance under competitive pressure according to an embodiment of the present invention will be described with reference to the drawings. In the following examples, experiments were conducted in a real shooting hall, which has requirements for a real competition venue, and a 10 m air rifle shooting ground was used, and 11 players (5 men and 6 women) of the Qinghua university shooting team were recruited for the experiments, which had shooting training experiences of 8 to 11 years, and the 11 players were right-handed and had normal eyesight.
Fig. 1 is a flowchart of a method for detecting and evaluating shooting performance under competitive pressure according to an embodiment of the present invention, and specifically, as shown in fig. 1, the method for detecting and evaluating shooting performance under competitive pressure includes the following steps:
in step S101, physiological signal characteristics during target shooting are collected.
Wherein, the physiological signal characteristics comprise an electroencephalogram signal and an electrocardiosignal of a shooter.
Specifically, the physiological signal acquisition comprises an electroencephalogram signal and an electrocardiosignal. The electroencephalogram signal can be recorded by an eego (TM) mylab full-mobile electroencephalogram recording and analyzing system produced by ANT company of Germany, the electroencephalogram of 32 channels is recorded, the lead distribution is shown as figure 2, the sampling rate is 1000Hz, and the electroencephalogram data of the tested object during shooting training are collected. In order to synchronously acquire firing time marks in the electroencephalogram signals, the invention adopts a microphone to capture the gunshot sound during shooting, and sends event marks (trigger) to the electroencephalogram equipment through a program programmed in a single chip microcomputer.
The electrocardiosignals can adopt a heart spectrum patch produced by Congbo-Zhonglian company, electrocardio is synchronously acquired in the shooting process, electrocardio data is transmitted to the mobile phone through Bluetooth, the heart rate change condition can be checked in real time through mobile phone app software, and the original electrocardio data can be downloaded and analyzed in an off-line mode. The heart rate change rule in the shooting process can be obtained by using heart spectrum patch analysis software (ECGLAbPro) for the electrocardio analysis.
In step S102, a shooting result and an aiming trajectory are acquired.
In one embodiment of the present invention, further comprising: the aiming track that the muzzle is aligned with the target paper when the shooter aims is detected by a sensor arranged at the tail end of the gun.
Specifically, the detection platform comprises: the shooting target scoring system for recording the shooting results is a SCATT MX-02 sensor and SCATT software which are produced by SCATT Electronics LLC company to obtain the shooting results (figure 3). The sensor is installed at the gun end and can record the moving track of the muzzle aligned with the target paper when the shooter aims. The firing process does not use ball firing, and the sensor can record the vibration of the gun when the trigger is pulled by a shooting hand and record the shooting score at the moment. The results are scored as decimal ring values, i.e. the best result of a single shot is 10.9 rings, and the worst result is 0 rings (off-target).
For example, to explore the differences in shooting performance and physiological information under competitive pressure, two experimental protocols were designed. Individual independent shooting experiments and two-player confrontation competitive experiments.
Firstly, carrying out 11 independent experiments, trying to wear physiological data acquisition equipment such as an electroencephalogram cap and the like, firstly carrying out 2-minute rest state physiological data acquisition, then carrying out shooting training, wherein 6 cycles are adopted in the experimental process, and 10 guns are opened in each cycle for 60 guns in total. Physiological data are collected through the electroencephalogram equipment and the heart spectrum paste, and the target scoring system feeds back the shooting result of each time.
Competitive experiments, where music is played on-site with noisy sound interference in order to simulate real shooting game scenarios. According to 11 individual shooting scores, the shooting scores are divided into two groups, and a reward punishment rule, a winner reward and a loser punishment are established in the experiment. In the process of being shot, a main test reports the result every time a gun is shot, simultaneously records the electroencephalogram signal and the electrocardio signal, records the shooting result, and the experimental flow is shown in figure 4.
In step S103, the shooting performance data of the target is evaluated based on the physiological signal characteristics, the shooting result, and the aiming trajectory.
In one embodiment of the present invention, further comprising: and transmitting the physiological signal characteristics and/or shooting performance data to a preset terminal. The preset terminal can be electric energy or mobile equipment.
Further, in an embodiment of the present invention, the method further includes: acquiring the current state of a target, wherein the current state comprises an athletic state and a non-athletic state; and correcting the shooting performance data of the target according to the current state.
Specifically, shooting performance evaluation is carried out from three aspects of shooting performance, heart rate change and electroencephalogram signal characteristics.
The shooting results are recorded by the target scoring system, the highest result is 10.9 rings, and the lowest result is 0 ring. The shooting result analysis is divided into result comparison under non-competitive and competitive states, and specifically comprises the following steps:
(1) in the non-competitive state, the average result of the shot was 10.052(SD ═ 0.09); in the competitive state, the average result of shooting was 10.048(SD ═ 0.05). The difference between the two is-0.004, p is 0.868>0.05, and the performances of the two states have no significant difference; when t (12) — 0.169, the competitive score was slightly lower than the non-competitive score, and the results are shown in fig. 5.
(2) Variation of heart rate
In the non-competitive state, the average heart rate of 11 individuals during shooting was 85.124 (SD-12.41); in the competitive state, the average heart rate during shooting was 94.928(SD ═ 14.19). p is 0.079>0.05, and the heart rate of the two states has no significant difference; and t is 1.933, which indicates that the heart rate is higher in the competitive state than in the non-competitive state. The results are shown in FIG. 5, with blocks 1-12 on the abscissa representing the non-contended state and blocks 13-24 representing the contended state.
As can be seen from fig. 6, the average heart rates of 11 persons in the competitive and noncompetitive states have no significant difference, and considering whether the individualized difference factors affect the results, the heart rate of each person is subjected to individualized analysis, and the heart rate variation of each person in two states is analyzed, wherein the heart rate of more than half of persons in the competitive state is higher than that in the noncompetitive state; one-fourth of the people have a lower heart rate in the competitive state than in the non-competitive state. Indicating that individualized differences exist and that there may be an impact on the overall result.
(3) Electroencephalographic data analysis
And (4) analyzing the electroencephalogram data by adopting Matlab software after preprocessing. The power spectra (powers) of all 29 electrode channels in 3 defined frequency ranges were calculated using the Fast Fourier Transform (FFT) with Hanning window (3000 ms before each shot, 3 time windows-3000 to-2000ms, -2000to-1000ms, -1000to 0ms (0 ms) were generated in a 3000ms time period, -the individual Alpha frequencies IAF of each participant were determined, IAF was calculated from the resting state data for the eyes in the resting state, the band ranges were re-determined according to the IAF definition, Theta band (IAF-6to IAF-4), Alpha band (IAF-2to IAF +2) and Beta band (IAF +3 to IAF +10), the powers were averaged over the adjusted band bands, Theta, Alpha and Beta band powers were calculated, the powers of the 29 leads of these three bands were calculated, the power of the selected channels is averaged to produce a value for each region. Considering the influence of the difference between individuals on the data, the data of all participants are processed by a median logarithmic transformation.
Furthermore, electroencephalogram data analysis is mainly performed from two aspects, the first is shooting performance difference analysis in competitive and non-competitive states, and in addition, electroencephalogram signal power distribution and shooting performance correlation are analyzed.
Effect of competition on electroencephalogram power
FIG. 7 shows Alpha, Theta and Beta power brain plots for two states, the first two rows showing power distribution plots for each band in the competitive and non-competitive states. Comparing the brain images in the two states shows that the frequency bands Alpha, Theta and Beta all show stronger power when shooting in the competitive state, and the inference is that in the competitive state, the shooter is influenced by the interference of environment, psychology, emotion and the like, and the brain needs more energy to maintain attention and concentrate on completing shooting tasks.
In order to clarify the relation, a multivariate regression model is established through multivariate linear regression analysis, and the prediction of the shooting score based on electroencephalogram signals can be realized.
Fig. 8 shows the results of multiple regression analysis of energy and performance of selected partial brain regions, multiple regression analysis model:
Adjusted R-Squared 0.813
p=0.00179
wherein x1, x2 and x3 represent the energy of three brain areas of Beta frequency band, the output y is the shooting result, the Beta energy distribution can obtain good regression effect, the strong correlation between the energy distribution and the shooting result is displayed, and the basic prediction of the result is realized through the energy distribution.
To sum up, the embodiment of the invention provides a shooting environment and physiological information detection technology for simulating a real shooting game scene and a shooting capability evaluation method under stress, discusses the influence on shooting performance and a brain activated neural mechanism under the stress condition, and discovers the following conditions through the analysis of the power change of electroencephalogram signals in a specific frequency band of a specific brain area: the power change of Beta frequency bands of the forehead lobe, the right occipital lobe area and the occipital area of the brain is in linear correlation with the shooting score, so that the shooting score can be predicted through the common shooting state electroencephalogram signals.
According to the shooting performance detection and evaluation method under competitive pressure provided by the embodiment of the invention, an experimental environment simulating a real competition scene is provided, multidimensional physiological indexes are collected, and the relation between the shooting performance and physiological parameters of athletes under a competitive state is evaluated, so that a better experimental platform and an evaluation method are provided for understanding how the brain performs self-regulation under pressure to achieve the optimal exercise performance.
Next, a shooting performance detection and evaluation apparatus under competitive pressure according to an embodiment of the present invention will be described with reference to the drawings.
Fig. 9 is a schematic structural diagram of a shooting performance detecting and evaluating apparatus under competitive pressure according to an embodiment of the present invention.
As shown in fig. 9, the competitive shooting performance detecting and evaluatingapparatus 10 includes: anacquisition module 100, afirst acquisition module 200, and anevaluation module 300.
Theacquisition module 100 is used for acquiring physiological signal characteristics in the target shooting process; the first obtainingmodule 200 is used for obtaining shooting scores and aiming tracks; theevaluation module 300 is used for evaluating the shooting performance data of the target according to the physiological signal characteristics, the shooting performance and the aiming track.
Further, in an embodiment of the present invention, the method further includes: the second acquisition module is used for acquiring the current state of the target, wherein the current state comprises an athletic state and a non-athletic state; and the correction module is used for correcting the shooting performance data of the target according to the current state.
Further, in an embodiment of the present invention, the method further includes: and the detection module is used for detecting the aiming track of the gunpoint aiming at the target paper when the shooter aims through the sensor arranged at the tail end of the gun.
Further, in an embodiment of the present invention, the method further includes: and the sending module is used for sending the physiological signal characteristics and/or the shooting performance data to a preset terminal.
Further, in one embodiment of the present invention, wherein the physiological signal characteristic comprises a shooter electrical signal and an electrical cardiac signal.
It should be noted that the foregoing explanation of the embodiment of the method for detecting and evaluating shooting performance under competitive pressure is also applicable to the device for detecting and evaluating shooting performance under competitive pressure of this embodiment, and is not repeated here.
According to the shooting performance detection and evaluation device under competitive pressure provided by the embodiment of the invention, an experimental environment simulating a real competition scene is provided, multidimensional physiological indexes are collected, and the relation between the shooting performance and physiological parameters of athletes under a competitive state is evaluated, so that a better experimental platform and an evaluation method are provided for understanding how the brain performs self-regulation under pressure to achieve the optimal exercise performance.
Furthermore, the terms "first", "second" and "first" 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 defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.