Bench press safety alarm system based on real-time monitoring

Abstract

The invention discloses a bench press safety alarm system based on real-time monitoring, which relates to the field of bench press safety alarm and comprises a data acquisition module, a server, a biomechanics module, a physiological analysis module and a management alarm module. The method comprises the following steps: respectively carrying out quantitative analysis on a muscle state, a torque state and a body stable state of a bench press on the basis of muscle movement information, torque information and body movement information of the bench press to obtain a signal frequency drop abnormal value, an inter-muscle cross correlation coefficient, a muscle abnormal value and a bench press twisting stable value, and carrying out analysis to obtain a biological force state value of the bench press; carrying out numerical analysis on the received sweat information, respiration information, skin information and saliva information to obtain a physiological state value of a bench press person, and judging the comprehensive motion state of the bench press person based on the biological force state value and the physiological state value of the bench press person to obtain a corresponding alarm strategy corresponding to an abnormal bench press person. The fitness state of a bench press sporter can be accurately judged from multiple directions, and the bench press sporter can be reminded in time.

Description

Technical Field

[0001] The invention relates to the field of bench press safety alarm, and in particular to a bench press safety alarm system based on real-time monitoring. Background Art

[0002] People are paying more and more attention to health, and fitness activities are increasing, especially bench press strength exercises. However, safety in bench press is particularly important. The intense bench press exercise can cause fitness people to lose strength, muscle fatigue and physical exhaustion, and even endanger their lives and health. The bench press safety alarm system based on real-time monitoring can meet the safety needs of fitness people.

[0003] The traditional bench press safety alarm system based on real-time monitoring cannot accurately determine the fitness status of the bench press athlete during operation, and cannot promptly remind the bench press athlete. At the same time, when determining the fitness status of the bench press athlete, it is also unable to monitor in multiple directions and depths, resulting in safety accidents still occurring from time to time. Therefore, accurately determining the fitness status of the bench press athlete from multiple depths and promptly reminding the bench press athlete are the technical problems to be solved by this technical solution.

[0004] In order to solve the above defects, a technical solution is now provided. Summary of the invention

[0005] In order to solve the technical problems raised by the above background technology, the present invention is proposed. An embodiment of the present invention provides a bench press safety alarm system based on real-time monitoring.

[0006] The purpose of the present invention can be achieved through the following technical solutions: a bench press safety alarm system based on real-time monitoring, including a data acquisition module, a server, a biomechanical module, a physiological analysis module and a management alarm module.

[0007] The data acquisition module is used to collect muscle movement information, torque information, body movement information, sweat information, breathing information, skin information and saliva information of the bench press user, and send it to the server for storage;

[0008] The biomechanics module quantitatively analyzes the muscle state, torque state and body stability state of the bench presser based on the muscle movement information, torque information and body movement information of the bench presser to obtain the biomechanical state value of the bench presser, and sends it to the management alarm module;

[0009] The physiological analysis module performs numerical analysis on the received sweat information, breathing information, skin information and saliva information to obtain the physiological status value of the bench presser, and sends it to the management alarm module;

[0010] The management alarm module determines the comprehensive motion state of the bench presser based on the bio-force state value and the physiological state value of the bench presser, and provides corresponding alarm strategies for abnormal bench pressers.

[0011] Furthermore, the specific steps of analyzing the bio-force value of the bench presser are as follows:

[0012] Obtain the accumulated amount of torque direction deviation of the bench presser, the torque shape value of the bench presser and the body stability value of the bench presser, calculate by formula, and obtain the torsional stability value lwz of the bench presser;

[0013] The muscle anomaly value is multiplied by the Ao1 weight factor coefficient to obtain the product value of one, the bench press body stability value is multiplied by the Ao2 weight factor coefficient to obtain the product value of two, and the product value of two is divided by the product value of one to obtain the bench press biological force value swz.

[0014] Furthermore, the specific analysis steps of the bench press body stability value are as follows:

[0015] Obtain the gravity direction vector of the bench presser's body through the accelerometer The pitch angle θ of rotation around the x-axis is given by the formula θ=arctan2(by,bz), and the roll angle δ of rotation around the y-axis is given by the formula The angular velocities wx, wy, and wz are measured by a gyroscope at a time interval of Δt. The angular velocities are integrated to obtain the pitch angle θ(t) = θ(t-Δt) + wx×Δt and the roll angle δ(t) = δ(t-Δt) + wy×Δt at each time point, where t represents each time point in the time series. The safe angle range of the pitch angle and the safe angle range of the roll angle are set, and the pitch angle and roll angle at each monitored time point that have been solved are counted to obtain the duration that the pitch angle and roll angle exceed the safe angle range, and the number of times the pitch angle and roll angle exceed the safe angle range. The body stability value sp of the bench press practitioner is obtained by analysis.

[0016] Furthermore, the specific analysis steps of the muscle shape anomaly value are as follows:

[0017] Obtain the muscle electrical signal amplitude of each group of bench presses of the exerciser, subtract the muscle electrical signal amplitude before the bench press from the muscle electrical signal amplitude after the bench press, obtain the electrical signal amplitude reduction value at each moment, perform sum calculation, and obtain the total value of the electrical amplitude reduction; convert the muscle electrical signal into a frequency signal through fast Fourier transform, when the frequency signal is lower than 50 Hz, it is a low-frequency signal, when the frequency signal is higher than 50 Hz and lower than 150 Hz, it is a medium-frequency signal, and when the frequency signal is higher than 150 Hz, it is a high-frequency signal, obtain the proportion of the low-frequency signal, the medium-frequency signal and the high-frequency signal at each group of bench presses, and analyze to obtain the signal frequency reduction abnormality value jz;

[0018] The total value of the electrical amplitude reduction, the muscle activation time value and the cross-correlation coefficient between muscles are reduced and combined with the signal frequency reduction eigenvalue jz to obtain the muscle eigenvalue jyz.

[0019] Furthermore, the specific analysis steps of the muscle activation time value and the muscle cross-correlation coefficient are as follows:

[0020] By placing electrodes on the surface of the muscle group of the bench presser, the electrical signals generated by the muscle contraction and relaxation process during the bench press activity are collected, and the interference of noise in the environment is removed by filtering to obtain muscle electrical signals, and the standard deviation of the signal amplitude of the bench presser in a quiet state is recorded, and the standard deviation of the amplitude is multiplied by a set multiple value to obtain a set evaluation muscle electrical signal amplitude threshold. In the bench press descending phase, the moment when the pectoralis major muscle electrical signal amplitude value exceeds the set amplitude threshold is recorded, and marked as the activation start time. After the bench press is completed, the moment when the muscle electrical signal amplitude value is equal to the set amplitude threshold during the reduction process is recorded, and marked as the activation end time. The activation end time is subtracted from the activation start time to obtain the muscle activation time value;

[0021] The electrical signals of the pectoralis major and triceps brachii are obtained, and the electrical signal values ​​at different times are obtained, which are respectively recorded as the pectoralis major electrical signal change function x(t) and the triceps brachii electrical signal change function y(t), wherein t is each time point from the beginning to the end of the monitoring time, the pectoralis major electrical signal value and the triceps brachii electrical signal value are multiplied at the same time point, and the products are summed, the triceps brachii electrical signal function is translated relative to the pectoralis major function in time according to 1, 2, 3, ..., M time units, M is the set offset distance that satisfies the calculation delay correlation, the sum of the products of the triceps brachii and the pectoralis major at the translation position is calculated, and marked as the inter-muscle cross-correlation value, the product value of the pectoralis major electrical signal standard deviation and the triceps brachii electrical signal standard deviation, the inter-muscle cross-correlation value is divided by the product value of the two, and the inter-muscle cross-correlation coefficient is obtained.

[0022] Furthermore, the specific steps of analyzing the physiological status of the bench presser are as follows:

[0023] By measuring the changes in current on the skin surface of the bench press participants, the skin conductivity pf is obtained. By analyzing the amylase and cortisol contents in the saliva of the bench press participants, and the abnormal duration of sodium concentration nc, abnormal duration of potassium concentration jc, abnormal duration of lactate content rc and abnormal respiratory symmetry hy, the formula is used to calculate the physiological state value slz of the bench press participants.

[0024] Furthermore, the specific analysis steps of the abnormal duration of sodium concentration, the abnormal duration of potassium concentration, the abnormal duration of lactic acid content and the abnormal symmetry of breathing are as follows:

[0025] The sodium concentration, potassium concentration and lactic acid content in the sweat of the bench press participants at each monitoring time point are obtained through a sweat sensor, and the sodium concentration, potassium concentration and lactic acid content change curves are established with the monitoring time as the horizontal axis and the sodium concentration, potassium concentration and lactic acid content as the vertical axis, respectively. The curves at each monitoring point are tangent processed, and the slopes of the tangents at each point of the sodium concentration, potassium concentration and lactic acid content are obtained respectively, and compared with the set reference change slope values ​​respectively, and the slopes of the tangents at each monitoring point of the sodium concentration, potassium concentration and lactic acid content are greater than the reference change slope values ​​respectively, and the abnormal duration of the sodium concentration, potassium concentration and lactic acid content are obtained;

[0026] By using a chest belt breathing sensor and covering the muscle breathing area on both sides of the chest, the chest expansion amplitude values ​​on both sides are obtained, the maximum amplitude values ​​of the chest expansion amplitudes on both sides are subtracted, and the absolute value is taken to obtain the breathing amplitude difference, the start of inhalation time on one side is recorded and subtracted from the inhalation time on the other side, and the absolute value is taken to obtain the inhalation time difference, the start of exhalation time on one side is recorded and subtracted from the exhalation time on the other side, and the absolute value is taken to obtain the exhalation time difference, the breathing amplitude difference, the inhalation time difference and the exhalation time difference are normalized, the breathing amplitude difference is taken as the bottom width of the cuboid, the inhalation time difference is taken as the bottom length of the cuboid, and the exhalation time difference is taken as the height of the cuboid, a cuboid is constructed, the external surface area of ​​the cuboid is identified, and it is marked as the breathing symmetry anomaly value hy.

[0027] Furthermore, the specific analysis steps of the corresponding alarm strategy corresponding to the abnormal bench presser are as follows:

[0028] Normalize the bench presser's physiological state value slz and the bench presser's bioforce state value swz, and obtain the bench presser's comprehensive state value wzz according to the set formula wzz=uou1×slz+uou2×swz, where uou1 and uou2 are the set correction factor coefficients of the bench presser's physiological state value and the bench presser's bioforce state value respectively;

[0029] Set up light alarm devices around the bench press equipment, with flashing lights in green, yellow and red, and sound alarm devices around the bench press equipment;

[0030] When the overall status value of the bench presser is less than the set comparison threshold GG1, the corresponding safety status of the bench presser is at a dangerous level, the light alarm device flashes red, and the sound alarm device emits a label of one at a volume of P1;

[0031] When the overall status value of the bench presser is less than the set comparison threshold GG3 and greater than or equal to the set comparison threshold GG2, the corresponding safety status of the bench presser is a warning level state, the light alarm device flashes yellow, and the sound alarm device emits label 2 at a volume of P2;

[0032] When the overall status value of the bench presser is greater than or equal to the set comparison threshold value GG3, the corresponding safety status of the bench presser is a safety level state, and the green light of the light alarm device flashes.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The present invention quantitatively analyzes the muscle state, torque state and body stability state of the bench presser based on the muscle movement information, torque information and body movement information of the bench presser, obtains the signal frequency drop state value, the muscle cross-correlation coefficient, the muscle state value and the bench presser's torsion stability value, and analyzes to obtain the bench presser's bioforce state value. By performing numerical analysis on the received sweat information, respiratory information, skin information and saliva information, the sodium concentration, potassium concentration, abnormal duration of lactic acid content, and respiratory symmetry value are obtained, and the bench presser's physiological state value is analyzed. The bench presser can be monitored from the bioforce change direction of multiple depths and the physiological parameter direction of multiple depths, thereby ensuring the accuracy of determining the fitness state of the bench presser.

[0035] 2. The present invention determines the comprehensive exercise state of the bench presser based on the bio-force state value and the physiological state value of the bench presser, obtains the comprehensive state value of the bench presser, and analyzes it with the set comparison threshold to obtain the corresponding alarm strategy corresponding to the abnormal bench presser. The present invention can accurately determine the fitness state of the bench presser and can promptly remind the bench presser to adjust the state in time when weakness, muscle fatigue and physical exhaustion occur, thereby reducing the occurrence of safety accidents and meeting the safety needs of fitness enthusiasts. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. The following drawings are not intentionally scaled according to the actual sizes, and the focus is on illustrating the main purpose of the present invention.

[0037] Figure 1 It is a system block diagram of the present invention. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present invention.

[0039] like Figure 1 As shown, a bench press safety alarm system based on real-time monitoring includes a data acquisition module, a server, a biomechanical module, a physiological analysis module and a management alarm module.

[0040] The data acquisition module is used to collect the biomechanical information and physiological information of the bench presser and send them to the server for storage. The biomechanical information of the bench presser includes the muscle movement information, torque information and body movement information of the bench presser, and the physiological information of the bench presser includes the sweat information, breathing information, skin information and saliva information of the bench presser.

[0041] The biomechanics module quantitatively analyzes the muscle state, torque state and body stability state of the bench presser based on the bench presser's muscle movement information, torque information and body movement information to obtain the bench presser's bioforce value, and sends it to the management alarm module. The specific analysis method is as follows:

[0042] By placing electrodes on the surface of the muscle groups of the bench presser, the electrical signals generated by the muscle contraction and relaxation process during the bench press activity are collected, and the interference of low-frequency noise in the environment is removed by high-pass filtering, and the interference of high-frequency noise in the environment is removed by low-pass filtering to obtain muscle electrical signals. The standard deviation of the signal amplitude of the bench presser in a quiet state is recorded, and the standard deviation of the amplitude is multiplied by a set multiple value, the specific set multiple value is 3 times, to obtain the set evaluation muscle electrical signal amplitude threshold. In the bench press descent phase, the moment when the pectoralis major muscle electrical signal amplitude exceeds the set amplitude threshold is recorded, and marked as the activation start time. After the bench press is completed, the moment when the muscle electrical signal amplitude is equal to the set amplitude threshold during the reduction process is recorded, and marked as the activation start time. The activation end time is obtained by subtracting the activation start time from the activation end time to obtain the muscle activation time value; the muscle electrical signal amplitude of each group of bench press moments of the exerciser is obtained, and the muscle electrical signal amplitude before the bench press moment is subtracted from the muscle electrical signal amplitude after the bench press moment to obtain the signal amplitude reduction value at each moment, and the sum is calculated to obtain the total value of the amplitude reduction; the muscle electrical signal is converted into a frequency signal by fast Fourier transform, when the frequency signal is lower than 50 Hz, it is a low-frequency signal, when the frequency signal is higher than 50 Hz and lower than 150 Hz, it is a medium-frequency signal, and when the frequency signal is higher than 150 Hz, it is a high-frequency signal, and the proportion of low-frequency signals, medium-frequency signals and high-frequency signals at each group of bench press moments is obtained, marked as dz i ,zz i and gz i , i represents the number of each set of bench press time, i = 1, 2, 3, ..., I, I is the maximum number of bench press time, according to the formula The signal frequency drop value jz is calculated, where a1, a2 and a3 are all set weight factor coefficients, and the specific values ​​are determined by professionals in this professional field;

[0043] The obtained electrical signals of the pectoralis major and triceps brachii muscles are used to obtain the electrical signal values at different times, which are respectively denoted as the pectoralis major muscle electrical signal variation function x(t) and the triceps brachii muscle electrical signal variation function y(t), where t represents each time point from the start to the end of the monitoring period. Multiply the pectoralis major muscle electrical signal value and the triceps brachii muscle electrical signal value at the same time point, and sum the products. Translate the triceps brachii muscle electrical signal function relative to the pectoralis major muscle function successively by 1, 2, 3,..., M time units in time, where M is the set offset distance that satisfies the calculation of delay correlation. Calculate the sum of the products at the translated positions of the triceps brachii and pectoralis major muscles, which is marked as the inter-muscular cross-correlation value. Calculate the product value of the standard deviation of the pectoralis major muscle electrical signal and the standard deviation of the triceps brachii muscle electrical signal. Divide the inter-muscular cross-correlation value by the product value of the two to obtain the inter-muscular cross-correlation coefficient. It should be noted that the value of the inter-muscular cross-correlation coefficient ranges from [-1, 1]. When the inter-muscular cross-correlation coefficient is closer to the value of 1, the muscles contract and relax simultaneously, reducing the risk of strain and injury.

[0044] Mark the muscle activation time value, the total reduction value of the electrical amplitude, and the inter-muscular cross-correlation coefficient as js, dj, and jj respectively, and perform normalization processing with the signal frequency reduction anomaly value jz according to the set formula

[0045] Calculate to obtain the muscle anomaly value jyz, where f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, and f11 are all set weight factor coefficients, f1 > f8, f2 > f9 > f6, f3 > f10 > f6, f4 < f7 < f11, d is the natural constant, with a specific value of 0.125, A1 is the set maximum value of the muscle activation time value, with a specific value of 5, A2 is the set minimum value of the muscle activation time value, with a specific value of 3, e is the natural constant, with a value of 2.718. It should be noted that the set muscle activation time is 3 seconds to 5 seconds.

[0046] Obtain the cumulative amount of torque direction offset, the torque anomaly value, and the body stability value of the bench presser, and mark them as lp, lz, and sp respectively, and perform normalization processing according to the set formula Obtain the torque stability value lwz of the bench presser, where tot1, tot2, and tot3 are the set correction factor coefficients for the cumulative amount of torque direction offset, the torque anomaly value, and the body stability value respectively, which are used to promote the accuracy of the calculation, with specific values of 0.515, 0.318, and 1.012.

[0047] It should be noted that the accumulated torque direction offset refers to the total offset of the torque direction of the elbow joint of the bench presser relative to the initial monitoring state within a certain monitoring period; the torque state abnormality value refers to the difference between the torque value at the monitoring end time and the monitoring start time within a certain monitoring period, marked as the torque difference variable value, and the square sum of the difference between the torque value at each monitoring time point and the torque average value, marked as the torque variance value. The torque difference variable value and the torque variance value are weighted and multiplied by the corresponding adjustment factor coefficient to obtain, wherein the torque magnitude value of the elbow joint is measured by the optical torque sensor;

[0048] It should also be noted that the steps for solving the body stability value of the bench press are as follows:

[0049] Obtain the gravity direction vector of the bench presser's body through the accelerometer The pitch angle θ of rotation around the x-axis is given by the formula θ=arctan2(by,bz), and the roll angle δ of rotation around the y-axis is given by the formula The angular velocities wx, wy, and wz at a time interval of Δt are measured by a gyroscope, and the angular velocities are integrated to obtain the pitch angle θ(t) = θ(t-Δt) + wx×Δt and the roll angle δ(t) = δ(t-Δt) + wy×Δt at each time point, where t represents each time point in the time series. The safe angle range of the pitch angle is set to -15° to 15°, and the safe angle range of the roll angle is set to -5° to 5°. The pitch angle and roll angle at each monitored time point are statistically analyzed to obtain the duration of the pitch angle and roll angle exceeding the safe angle range, which are marked as yt and at, respectively. The number of times the pitch angle and the roll angle exceed the safe angle range is obtained, marked as yc and ac respectively, and the duration yt of the pitch angle exceeding the safe angle range, the duration at of the roll angle exceeding the safe angle range, the number of times the pitch angle exceeds the safe angle range yc and the number of times the roll angle exceeds the safe angle range ac are normalized and substituted into the set formula sp=f1×π / yt+f2×2 / at+f3×2.12 / yc+f4×π / ac to obtain the body stability value sp of the bench presser, where f1, f2, f3 and f4 are set weight factor coefficients, and the specific values ​​are determined by personnel in this professional field;

[0050] The muscle anomaly value is multiplied by the Ao1 weight factor coefficient to obtain the product value of one, the bench press torsion stability value is multiplied by the Ao2 weight factor coefficient to obtain the product value of two, and the product value of two is divided by the product value of one to obtain the bench press bioforce value swz.

[0051] The physiological analysis module obtains the physiological status of the bench presser by numerically analyzing the received sweat information, breathing information, skin information and saliva information, and sends it to the management alarm module; specifically:

[0052] The sodium concentration, potassium concentration and lactic acid content in the sweat of the bench press participants at each monitoring time point are obtained through the sweat sensor. The sodium concentration, potassium concentration and lactic acid content change curves are established with the monitoring time as the horizontal axis and the sodium concentration, potassium concentration and lactic acid content as the vertical axis. The curves of each monitoring point are processed by tangent, and the slopes of the tangents of each point of the sodium concentration, potassium concentration and lactic acid content are obtained respectively. The slopes of the tangents of each monitoring point of the sodium concentration, potassium concentration and lactic acid content are compared with the set reference change slope values ​​respectively. The values ​​of the abnormal duration of the monitoring points whose tangent slopes are greater than the reference change slope values ​​are counted respectively, and are marked as nc, jc and rc respectively;

[0053] By using a chest belt breathing sensor and covering the muscle breathing area on both sides of the chest, the chest expansion amplitude values ​​on both sides are obtained, the maximum amplitude values ​​of the chest expansion amplitudes on both sides are subtracted, and the absolute value is taken to obtain the breathing amplitude difference, the start of inhalation time on one side is recorded and subtracted from the inhalation time on the other side, and the absolute value is taken to obtain the inhalation time difference, the start of exhalation time on one side is recorded and subtracted from the exhalation time on the other side, and the absolute value is taken to obtain the exhalation time difference, the breathing amplitude difference, the inhalation time difference and the exhalation time difference are normalized, the breathing amplitude difference is taken as the bottom width of the cuboid, the inhalation time difference is taken as the bottom length of the cuboid, and the exhalation time difference is taken as the height of the cuboid, a cuboid is constructed, the outer surface area of ​​the cuboid is identified, and marked as the breathing symmetry anomaly value hy;

[0054] By measuring the current changes on the skin surface of the bench presser, the skin conductivity pf is obtained. By analyzing the amylase content and cortisol content in the bench presser's saliva, they are marked as dm and pc, and normalized with the abnormal duration of sodium concentration nc, the abnormal duration of potassium concentration jc, the abnormal duration of lactic acid content rc and the abnormal respiratory symmetry hy. According to the set formula Calculation is performed to obtain the bench press physiological value slz, where h1, h2, h3, h4, h5, h6 and h7 are all set weight coefficients;

[0055] The management alarm module receives the bench presser's bio-force state value and the bench presser's physiological state value, and judges their comprehensive motion state based on this. The corresponding alarm strategy for abnormal bench pressers is specifically analyzed as follows:

[0056] Normalize the bench presser's physiological state value slz and the bench presser's bioforce state value swz, and obtain the bench presser's comprehensive state value wzz according to the set formula wzz=uou1×slz+uou2×swz, where uou1 and uou2 are the set correction factor coefficients of the bench presser's physiological state value and the bench presser's bioforce state value, respectively, and the values ​​are positive integers to improve the accuracy of the calculation;

[0057] Set up light alarm devices around the bench press equipment, with flashing lights in green, yellow and red, and sound alarm devices around the bench press equipment;

[0058] When the overall status value of the bench presser is less than the set comparison threshold GG1, the corresponding safety status of the bench presser is at a dangerous level, the light alarm device flashes red, and the sound alarm device emits a sound at a volume of P1, "The current status is dangerous, please stop exercising immediately";

[0059] When the overall status value of the bench presser is less than the set comparison threshold GG3 and greater than or equal to the set comparison threshold GG2, the corresponding safety status of the bench presser is at the warning level, the light alarm device flashes yellow, and the sound alarm device emits a sound at a volume of P2, "The current status requires attention, reduce the intensity of exercise";

[0060] When the overall status value of the bench presser is greater than or equal to the set comparison threshold value GG3, the corresponding safety state of the bench presser is a safety level state, the green light of the light alarm device flashes, and the sound alarm device has no corresponding operation, wherein the set comparison threshold value GG1, the set comparison threshold value GG2 and the set comparison threshold value GG3 are increased in a gradient, and the sound volume P1 is greater than the sound volume P2;

[0061] The present invention quantitatively analyzes the muscle state, torque state and body stability state of the bench presser based on the muscle movement information, torque information and body movement information of the bench presser, obtains the signal frequency drop state value, the muscle cross-correlation coefficient, the muscle state value and the bench presser's torsion stability value, and obtains the bench presser's bioforce state value by analysis. By performing numerical analysis on the received sweat information, respiratory information, skin information and saliva information, the sodium concentration, potassium concentration, abnormal duration of lactic acid content and respiratory symmetry value are obtained, and the bench presser's physiological state value is obtained by analysis. The bench presser can be monitored from the bioforce change direction of multiple depths and the physiological parameter direction of multiple depths, thereby ensuring the accuracy of determining the fitness state of the bench presser.

[0062] The present invention determines the comprehensive exercise state of the bench presser based on the bio-force state value and the physiological state value of the bench presser, obtains the comprehensive state value of the bench presser, and analyzes it with the set comparison threshold value to obtain the corresponding alarm strategy corresponding to the abnormal bench presser. The present invention can accurately determine the fitness state of the bench presser and can promptly remind the bench presser to adjust the state in time when weakness, muscle fatigue and physical exhaustion occur, thereby reducing the occurrence of safety accidents and meeting the safety needs of fitness enthusiasts.

[0063] The above is an explanation of the present invention and should not be considered as a limitation thereof. Although several exemplary embodiments of the present invention have been described, it will be readily appreciated by those skilled in the art that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present invention. Therefore, all such modifications are intended to be included within the scope of the present invention as defined in the claims. It should be understood that the above is an explanation of the present invention and should not be considered as being limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the appended claims. The present invention is defined by the claims and their equivalents.

Claims

1. A bench press safety alarm system based on real-time monitoring, characterized in that: include: The data collection module is used to collect the muscle movement information, torque information, body movement information, sweat information, breathing information, skin information and saliva information of the bench press user, and send it to the server for storage; The biomechanics module quantitatively analyzes the muscle state, torque state and body stability state of the bench presser based on the muscle movement information, torque information and body movement information of the bench presser, obtains the biomechanical state value of the bench presser, and sends it to the management alarm module; The physiological analysis module performs numerical analysis on the received sweat information, breathing information, skin information and saliva information to obtain the physiological status of the bench press user and sends it to the management alarm module; The management alarm module determines the comprehensive exercise state of the bench presser based on the bio-force state value and the physiological state value of the bench presser, and analyzes it with the set comparison threshold to obtain the corresponding alarm strategy for abnormal bench pressers.

2. A bench press safety alarm system based on real-time monitoring according to claim 1, characterized in that: The specific analysis steps of the bench press bio-force value are as follows: Obtain the accumulated amount of torque direction deviation of the bench presser, the torque shape value of the bench presser and the body stability value of the bench presser, calculate by formula, and obtain the torsional stability value lwz of the bench presser; The muscle anomaly value is multiplied by the Ao1 weight factor coefficient to obtain the product value of one, the bench press body stability value is multiplied by the Ao2 weight factor coefficient to obtain the product value of two, and the product value of two is divided by the product value of one to obtain the bench press biological force value swz.

3. A bench press safety alarm system based on real-time monitoring according to claim 2, characterized in that: The specific analysis steps of the bench press body stability value are as follows: Obtain the gravity direction vector of the bench presser's body through the accelerometer The pitch angle θ of rotation around the x-axis is given by the formula θ=arctan2(by,bz), and the roll angle δ of rotation around the y-axis is given by the formula The angular velocities wx, wy, and wz are measured by a gyroscope at a time interval of Δt. The angular velocities are integrated to obtain the pitch angle θ(t) = θ(t-Δt) + wx×Δt and the roll angle δ(t) = δ(t-Δt) + wy×Δt at each time point, where t represents each time point in the time series. The safe angle range of the pitch angle and the safe angle range of the roll angle are set, and the pitch angle and roll angle at each monitored time point that have been solved are counted to obtain the duration that the pitch angle and roll angle exceed the safe angle range, and the number of times the pitch angle and roll angle exceed the safe angle range. The body stability value sp of the bench press practitioner is obtained by analysis.

4. A bench press safety alarm system based on real-time monitoring according to claim 2, characterized in that: The specific analysis steps of the muscle shape value are as follows: Obtain the muscle electrical signal amplitude of each group of bench presses of the exerciser, subtract the muscle electrical signal amplitude before the bench press from the muscle electrical signal amplitude after the bench press, obtain the electrical signal amplitude reduction value at each moment, perform sum calculation, and obtain the total value of the electrical amplitude reduction; convert the muscle electrical signal into a frequency signal through fast Fourier transform, when the frequency signal is lower than 50 Hz, it is a low-frequency signal, when the frequency signal is higher than 50 Hz and lower than 150 Hz, it is a medium-frequency signal, and when the frequency signal is higher than 150 Hz, it is a high-frequency signal, obtain the proportion of the low-frequency signal, the medium-frequency signal and the high-frequency signal at each group of bench presses, and analyze to obtain the signal frequency reduction abnormality value jz; The total value of the electrical amplitude reduction, the muscle activation time value and the cross-correlation coefficient between muscles are reduced and combined with the signal frequency reduction dysmorphic value jz to calculate the muscle dysmorphic value jyz.

5. A bench press safety alarm system based on real-time monitoring according to claim 4, characterized in that: The specific analysis steps of the muscle activation time value and the muscle cross-correlation coefficient are as follows: By placing electrodes on the surface of the muscle group of the bench presser, the electrical signals generated by the muscle contraction and relaxation process during the bench press activity are collected, and the interference of noise in the environment is removed by filtering to obtain muscle electrical signals, and the standard deviation of the signal amplitude of the bench presser in a quiet state is recorded, and the standard deviation of the amplitude is multiplied by a set multiple value to obtain a set evaluation muscle electrical signal amplitude threshold. In the bench press descending phase, the moment when the pectoralis major muscle electrical signal amplitude value exceeds the set amplitude threshold is recorded, and marked as the activation start time. After the bench press is completed, the moment when the muscle electrical signal amplitude value is equal to the set amplitude threshold during the reduction process is recorded, and marked as the activation end time. The activation end time is subtracted from the activation start time to obtain the muscle activation time value; The electrical signals of the pectoralis major and triceps brachii are obtained, and the electrical signal values ​​at different times are obtained, which are respectively recorded as the pectoralis major electrical signal change function x(t) and the triceps brachii electrical signal change function y(t), wherein t is each time point from the beginning to the end of the monitoring time, the pectoralis major electrical signal value and the triceps brachii electrical signal value are multiplied at the same time point, and the products are summed, the triceps brachii electrical signal function is translated relative to the pectoralis major function in time according to 1, 2, 3, ..., M time units, M is the set offset distance that satisfies the calculation delay correlation, the sum of the products of the triceps brachii and the pectoralis major at the translation position is calculated, and marked as the inter-muscle cross-correlation value, the product value of the pectoralis major electrical signal standard deviation and the triceps brachii electrical signal standard deviation, the inter-muscle cross-correlation value is divided by the product value of the two, and the inter-muscle cross-correlation coefficient is obtained.

6. A bench press safety alarm system based on real-time monitoring according to claim 1, characterized in that: The specific analysis steps of the physiological status of the bench press person are as follows: By measuring the changes in the current on the skin surface of the bench press participants, the skin conductivity pf is obtained. By analyzing the amylase and cortisol contents in the bench press participants' saliva, and the abnormal duration of sodium concentration nc, abnormal duration of potassium concentration jc, abnormal duration of lactate content rc and abnormal respiratory symmetry hy, calculations are performed to obtain the physiological state value slz of the bench press participants.

7. A bench press safety alarm system based on real-time monitoring according to claim 6, characterized in that: The specific analysis steps for the abnormal duration of sodium concentration, the abnormal duration of potassium concentration, the abnormal duration of lactic acid content and the abnormal symmetry of breathing are as follows: The sodium concentration, potassium concentration and lactic acid content in the sweat of the bench press participants at each monitoring time point are obtained through a sweat sensor, and the sodium concentration, potassium concentration and lactic acid content change curves are established with the monitoring time as the horizontal axis and the sodium concentration, potassium concentration and lactic acid content as the vertical axis, respectively. The curves at each monitoring point are tangent processed, and the slopes of the tangents at each point of the sodium concentration, potassium concentration and lactic acid content are obtained respectively, and compared with the set reference change slope values ​​respectively, and the slopes of the tangents at each monitoring point of the sodium concentration, potassium concentration and lactic acid content are greater than the reference change slope values ​​respectively, and the abnormal duration of the sodium concentration, potassium concentration and lactic acid content are obtained; By using a chest belt breathing sensor and covering the muscle breathing area on both sides of the chest, the chest expansion amplitude values ​​on both sides are obtained, the maximum amplitude values ​​of the chest expansion amplitudes on both sides are subtracted, and the absolute value is taken to obtain the breathing amplitude difference, the start of inhalation time on one side is recorded and subtracted from the inhalation time on the other side, and the absolute value is taken to obtain the inhalation time difference, the start of exhalation time on one side is recorded and subtracted from the exhalation time on the other side, and the absolute value is taken to obtain the exhalation time difference, the breathing amplitude difference, the inhalation time difference and the exhalation time difference are normalized, the breathing amplitude difference is taken as the bottom width of the cuboid, the inhalation time difference is taken as the bottom length of the cuboid, and the exhalation time difference is taken as the height of the cuboid, a cuboid is constructed, the external surface area of ​​the cuboid is identified, and it is marked as the breathing symmetry anomaly value hy.

8. A bench press safety alarm system based on real-time monitoring according to claim 6, characterized in that: The specific analysis steps of the corresponding alarm strategy for the abnormal bench press are as follows: Normalize the bench presser's physiological state value slz and the bench presser's bioforce state value swz, and obtain the bench presser's comprehensive state value wzz according to the set formula wzz=uou1×slz+uou2×swz, where uou1 and uou2 are the set correction factor coefficients of the bench presser's physiological state value and the bench presser's bioforce state value respectively; Set up light alarm devices around the bench press equipment, with flashing lights in green, yellow and red, and sound alarm devices around the bench press equipment; When the overall status value of the bench presser is less than the set comparison threshold GG1, the corresponding safety status of the bench presser is at a dangerous level, the light alarm device flashes red, and the sound alarm device emits a label of one at a volume of P1; When the overall status value of the bench presser is less than the set comparison threshold GG3 and greater than or equal to the set comparison threshold GG2, the corresponding safety status of the bench presser is a warning level state, the light alarm device flashes yellow, and the sound alarm device emits label 2 at a volume of P2; When the overall status value of the bench presser is greater than or equal to the set comparison threshold value GG3, the corresponding safety status of the bench presser is a safety level state, and the green light of the light alarm device flashes.

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