CN105147284A - Improved human body balance function detection method and training system - Google Patents
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Abstract
The invention discloses an improved human body balance function detection method and training system, and relates to the field of medical equipment. According to the invention, monitoring on myoelectricity, measurement of the center of gravity based on an acceleration sensor and a falling-down detection method are applied to balance function detection and rehabilitation function training, the defect that the test index of an existing balancing instrument is single is corrected, and therefore comprehensive and accurate detection on the human body balance function and more scientific rehabilitation function training are achieved. The training system comprises a human body myoelectricity and acceleration detection module, a human body balance pressure signal detection device, a centre-of-gravity position real-time display, a balance function liquid crystal display screen and balance function monitoring software based on a computer. The human body myoelectricity and acceleration detection module comprises a myoelectricity amplification circuit, a three-axis acceleration sensor, a signal processing circuit, a data acquisition circuit and a radio communication circuit. The human body myoelectricity and acceleration detection module fixed on the back waist position carries out data transmission with the computer through a wireless transmission module. The balance function monitoring software based on the computer processes, analyzes, stores and replays myoelectric signals, acceleration signals and pressure signals, and detects and gives alarms to falling-down events in real time.
Description
Technical field
The present invention relates to the system of a kind of modified model body balance quantitative detecting method and body balance rehabilitation training.
Background technology
In the physical signs that human body is numerous, human body keep balance function be human body important physical signs and fundamental motor skills, people stand, sit, row time all need health have keep balance ability.Clinically, no matter under balance refers to a kind of posture that human body is in or steady statue and when being in which kind of position, when motion or when being subject to External Force Acting, automatically can adjust and maintain the ability of posture.The minimal invasive treatment of balanced capacity obstacle cannot take care of oneself, quality of life degradation, and even not only give patient self all can cause huge burden to its society of family simultaneously.Therefore, Accurate Assessment body balance has important value at medical field.
At present, the detection method of balanced ability of human body mainly comprises observational method, scale score method and equilibristat method.Observational method is simply easy to operation, but too rough subjectivity and shortage quantize, and the patient be therefore mainly used in having balance dysfunction simply screens; Scaling method can to balanced capacity quantitative estimation, but operate relatively loaded down with trivial details, and doctor in operation subjectivity is still very strong.Along with the development of computer technology, the assessment of body balance and rehabilitation training have had new development, equilibrium testing method based on computer technology not only can reflect the equilibrium function of human body objective quantitative, and training for treatment can be carried out for the dyskinesia of patient, but external tester, due to expensive, is difficult to popularization and application.
Patent CN101332091A discloses one and utilizes photoelectric technology and sequence image analysis technology, and the vibrating locus of the multiple significant points of synchronous recording human body on two dimensional surface, makes this invention more can accurately assess body balance.Patent CN201248696Y invention is a kind of based on posturography technology, evaluates the balance of measured and the body balance detecting instrument of stability by measuring measured's pressure be applied on platform.This invention is more accurate compared with simple motion test, objective.
Above-mentioned technical method Problems existing is: on the one hand, only only has measured to be applied to the force value of platform, can not the assessment body balance of Comprehensive.On the other hand, likely there will be the situation of falling in people's motor process, foregoing invention lacks detection when falling.
Summary of the invention
In order to solve the above problems, the present invention proposes and the method for the monitoring to myoelectricity and the center of gravity measurement based on acceleration transducer and fall detection is applied to equilibrium function detection and recovery function training, compensate for the defect that existing equilibristat test index is single, thus achieve the comprehensive accurate detection of body balance and the training of more scientific recovery function.
Technical scheme comprises: human body myoelectricity and acceleration detecting, total balance of the body pressure signal checkout gear, the real-time display of position of centre of gravity, equilibrium function LCDs, computer.Human body myoelectricity and acceleration detecting block comprise myoelectricity amplifying circuit, 3-axis acceleration sensor, signal processing circuit, data acquisition circuit, and wireless communication module.First collect electromyographic signal by electrode, be transferred to myoelectricity amplifying circuit, after filtering, amplify after be transferred to signal processing circuit, simultaneously acceleration detection
The 3-axis acceleration sensor of module also by the human body three-dimensional accekeration Signal transmissions that collects to signal processing circuit, signal processing circuit obtains digital signal to electromyographic signal and acceleration signal through a series of process, then the data acquisition circuit stored as date processing and data by the memorizer of microprocessor and connection is transferred to, carry out wireless transmission through radio communication circuit module, then by the serial communication of receiving terminal and computer, digital signal is sent to the real-time display of host computer and process.
The electrode of checking with EMG method can change measuring position according to test item; leg muscle is measured when such as uprightly detecting; waist muscle is measured when sitting posture detects; by the Treatment Analysis of the electromyographic signal to each position; the sequencing of the muscle activation of certain action and the order had an effect of muscle can well be evaluated; and the sequencing of compatibility relation between them and shutdown activity, this is the important parameter of comprehensive assessment body balance.
Acceleration detection module selects the sensor of Freescale MMA7260 3-axis acceleration chip, and lies in human lumbar rear portion with elastic bandage, realizes the measurement of mobilizing exercises acceleration such as standing human body seat, upright.The three-dimensional acceleration value of acceleration transducer collection human body directly can measure the position of gravity center of human body, more accurate relative to traditional method according to double-legged center of gravity indirect inspection, can also carry out real-time testing and alarm by equilibrium function monitoring of software to falling.
Total balance of the body pressure signal checkout gear is constructed as follows: comprise that seat stands, the pressure detecting plate of upright or finger pressure, four (or eight) pressure transducers are had below check-out console, be symmetrically distributed in dull and stereotyped four angles (or eight orientation), when pressure acts on flat board, the sensor of four angles (or eight orientation) namely provides a certain size the signal of telecommunication with pressure correlation.Above-mentioned pressurized, seat pressure, upright signal are through signal processing circuit, and connect the input port of microprocessor, the data acquisition circuit stored as date processing and data by the memorizer of microprocessor and connection, the output port of microprocessor connects equilibrium function LCDs, shows pressure signal in real time.
Equilibrium function LCDs.On the one hand, display screen can be used for showing centre-of gravity shift situation, is followed the tracks of the change of self center of gravity by the display change of liquid crystal display screen.On the other hand, the size (being body weight during upright detection) of actual pressure is shown.Patient according to the display of liquid crystal display screen, can adjust the position of centre of gravity of self, thus realizes recovery function training.
Innovative point of the present invention is:
1) checking with EMG method is applied to the assessment of equilibrium function.Electromyographic signal is that the electrode of the checking with EMG method module of this covering device can change measuring position according to test item with the electro-physiological signals occurred in muscle contraction, measures leg muscle when such as uprightly detecting, and measures waist muscle etc. when sitting posture detects.By changing electrode position, we can obtain leg or waist electromyographic signal, through the electromyographic signal Treatment Analysis that computer is real-time, can obtain muscle activation sequential, time-histories, muscle fatigue degree and the rapport between human leg and waist muscle.Comprehensively real-time myoelectricity analysis and the analysis of real-time gravity center of human body, more accurately comprehensively can not only assess body balance, recovery function also can better be instructed to train.
2) acceleration detection module application is in the measurement of center of gravity and fall detection.The acceleration detection module at waist rear portion can be real-time the accekeration obtaining trunk three-dimensional, the three-dimensional motion figure of gravity center of human body can be obtained by computer disposal display.Relative to the three-dimensional motion of directly measuring trunk or centre of body weight in training process, gathered the three-dimensional acceleration value of human body by acceleration transducer than more accurately reliable according to the method for double-legged center of gravity indirect inspection in original method.The three-dimensional motion of the center of gravity obtained both may be used for assessment body balance, has instructed recovery function to train, and also can be used for judging in detection or recovery function training process and whether abnormal falling occurring.
Fig. 1 structured flowchart of the present invention
Fig. 2 functional block diagram of the present invention
Fig. 3 analysis software flow process of the present invention functional diagram
Detailed description of the invention
Modified model body balance function detecting method and training system, relative to current existing technology, method proposed by the invention effectively can improve the accuracy of body balance function detecting method, and can prevent falling in motor process.
In order to make object of the present invention, technological merit and conceptual design clear and definite more, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Overall framework as shown in Figure 1.In Fig. 2, detection system circuit structure forms primarily of multiway analog switch, A/D change-over circuit, data processing circuit and data storage circuitry.Electromyographic signal and acceleration signal are all by radio communication mold Bulk transport, myoelectricity module electrodes adopts Ag/AgCl surface electrode or needle electrode, electrode is collected electromyographic signal, be transferred to myoelectricity amplifying circuit, through signal processing circuit, carry out wireless transmission through radio communication circuit module again, be finally connected with computer by single-chip microcomputer receiving terminal.Acceleration detection module can select the sensor of Freescale MMA7260 3-axis acceleration chip, and radio communication circuit resume module chip can select MSP430, the ZigBee technology that communication technology useful application is the most general.The model typical case of multi-channel analog switch circuit 4051, A/D change-over circuit is: the signal of processor can adopt 89C51 type.As shown in Figure 3, the equilibrium function analysis software on computer can carry out real-time monitoring or playback by function selecting, if Real-Time Monitoring, can select electromyographic signal collection pattern and pressure data drainage pattern.If playback mode, then software reads the data stored, and carries out the analysis of equilibrium function, and display analysis result.
Analytical system workflow:
(1) patient information management
The database manipulation that user can be increased patient data by patient's basic information management instrument, revise, delete, inquiry etc. is basic.
(2) data acquisition
The pattern (comprising " uprightly ", " directly sitting ", " finger " etc.) that user can select electromyographic signal collection pattern (comprising " leg myoelectricity ", " waist myoelectricity " etc.), pressure data to gather, the scanning speed of waveform display and acquisition time.Data acquisition and waveform show and synchronously carry out, and gather that terminate can autostore.
(3) data readback
Because the storage of data is harmless, so can the data that gathered in the past of playback without distortion.Operation has the function such as Zoom display, measure of time.
(4) analysis result
Electromyographic signal is analyzed, and we are main is time-histories and the sequential of analyzing electromyographic signal.Time-histories, refers to and depart from baseline this time course to recovery point from myoelectricity curve.It represent muscle move time discharge time length, namely muscle participate in motion time length, can be utilized it judge the activity time length of a muscle in a certain action.Sequential, refers to when multiple muscle participates in motion, the sequencing that each muscle is activated.Electromyographic signal analysis can evaluate that seat stands well in real time, the muscle of human leg and waist is had an effect order in the activity such as upright, and the rapport obtained between human leg and waist muscle and muscle fatigue degree.
Acceleration signal is analyzed, and by the sensor of 3-axis acceleration chip, we can obtain center of gravity accurately in three-dimensional position, and host computer can the position of real time record center of gravity the three-dimensional barycenter trajectory figure of display and parameters.
To each direction waveform power analysis of spectrum.
Center of Pressure calculates
Check-out console has been by the biped pressure of person upright, seat pressure or hand pressure information convert the energy conversion elements of voltage signal to, its ultimate principle is: have four pressure transducers below pressure detecting plate, be symmetrically distributed in four dull and stereotyped angles, when pressure acts on flat board, namely the sensor at four angles provides a certain size the signal of telecommunication, these signals can be tried to achieve the center acting on the upper instantaneous pressure of flat board (check-out console) by conversion, the center position coordinates pointwise record that these are changed at any time or shown by liquid crystal display screen, can various analysis be carried out to equilibrium function or be practiced by aobvious.
Check-out console is as shown in Figure 1 stressed, and zero is set to check-out console center, A (x
1, y
1), B (x
2, y
2), C (x
1, y
3), D (x
4, y
4) be respectively the position of four sensors.According to mechanics principle, maintaining check-out console equilibrium condition is:
F＝f
1+f
2+f
3+f
4(1)
FX＝f
1x
1+f
2x
2+f
3x
3+f
4x
4(2)
FY＝f
1y
1+f
2y
2+f
3y
3+f
4y
4(3)
In figure, E (X, Y) is for external pressure is relative to the coordinate of check-out console, i.e. equivalent pressure center.
Because sensor is symmetrical, i.e. x
2=-x
1, x
3=-x
1, x
4=x
1, y
2=y
1, y
3=-y
1, y
4=-y
1, substituted into (2), (3) formula obtained:
Wherein f
1, f
2, f
3, f
4time dependent respectively, so, X, Y value are also one group of time dependent functions, i.e. X=X (t), Y=Y (t), by the E (X in each moment, Y) signal of telecommunication of value is recorded, and can obtain the information of center movement on check-out console of external pressure.Again its pointwise is described, Center of Pressure moving curve or trajectory diagram can be obtained.
In order to its actual size of cancellation is on studied a question impact, to above, (4), (5) formula are normalized respectively, then after normalization, the coordinate of E point (external pressure center) is:
(6) namely formula and (7) formula are the outside coordinate expressions sitting relative check-out console position, Center of Pressure.
What finally illustrate is; below described by reference to the accompanying drawings embodiment is only the preferred embodiment of the present invention; and be not the restriction of protection scope of the present invention; any based on the present invention's improvement of doing of spirit or equivalently to replace; only otherwise depart from the spirit and scope of the present invention, all should be encompassed within scope.
Claims (10)
1. a modified model body balance function detecting method and training system, for carrying out assessment and the rehabilitation training of body balance, system comprises human body myoelectricity and acceleration detecting, total balance of the body pressure signal checkout gear, the real-time display of position of centre of gravity, equilibrium function LCDs, body balance monitoring of software and computer.
2. human body myoelectricity according to claim 1 and acceleration detecting, is characterized in that it comprises myoelectricity amplifying circuit, 3-axis acceleration sensor, signal processing circuit, data acquisition circuit, and wireless communication module.
3. human body myoelectricity according to claim 1 and acceleration detecting, is characterized in that, can monitor electromyographic signal and three-dimensional acceleration signal simultaneously.The electrode of checking with EMG method module can change measuring position according to test item, leg muscle is measured when such as uprightly detecting, waist muscle etc. is measured when sitting posture detects, the rapport between each position muscle of human body can be obtained by electromyographic signal, thus assess body balance accurately more comprehensively.
4. human body myoelectricity according to claim 1 and acceleration detecting, it is characterized in that, the acceleration detection module at waist rear portion can be real-time the accekeration obtaining trunk three-dimensional, the three-dimensional motion figure of gravity center of human body can be obtained by computer disposal display.Relative to the three-dimensional motion of directly measuring trunk or centre of body weight in training process, gathered the three-dimensional acceleration value of human body by acceleration transducer than more accurately reliable according to the method for double-legged center of gravity indirect inspection in original method.
5. human body myoelectricity according to claim 1 and acceleration detecting, is characterized in that, electromyographic signal and acceleration signal carry out data transmission by radio communication.
6. human body myoelectricity according to claim 1 and acceleration detecting, it is characterized in that, realize the date processing of myoelectricity and acceleration signal, analysis, storage playback by computer equilibrium function monitoring of software, real-time testing and alarm is carried out to abnormal falling.
7. body balance rehabilitation training system, it is characterized in that, comprise that seat stands, the pressure detecting plate of upright or finger pressure, four (or eight) pressure transducers are had below check-out console, be symmetrically distributed in dull and stereotyped four angles (or eight orientation), when pressure acts on flat board, the sensor of four angles (or eight orientation) namely provides a certain size the signal of telecommunication with pressure correlation.Above-mentioned pressurized, seat pressure, upright signal are through signal processing circuit, and connect the input port of microprocessor, the data acquisition circuit stored as date processing and data by the memorizer of microprocessor and connection, the output port of microprocessor connects equilibrium function LCDs, shows pressure signal in real time.Electromyographic signal and acceleration signal transmit data to computer analysis display by wireless communication module simultaneously.
8. body balance rehabilitation training system, is characterized in that, balance liquid crystal screen display display screen display centre-of gravity shift situation, and display Center of Pressure (center of gravity) coordinate.
9. body balance rehabilitation training system, is characterized in that, the electromyographic signal that checking with EMG method module obtains can obtain the rapport between each position muscle of human body, thus more scientific guidance training.
10. body balance rehabilitation training system, is characterized in that, the accekeration obtaining trunk three-dimensional that acceleration detection module can be real-time, can be obtained the three-dimensional motion figure of gravity center of human body by computer disposal display.
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