CN103505219A - System and method for human body gait evaluation - Google Patents
System and method for human body gait evaluation Download PDFInfo
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Abstract
The invention discloses a system and method for human body gait evaluation. The system comprises an information collecting module, a wireless communication module and a data analysis terminal. The information collecting module measures and processes three-dimensional acceleration signals of the two feet and the waist and sends the processed signals to the data analysis terminal through the wireless communication module; the data analysis terminal analyzes the wireless uploaded signals and shows an evaluation result with the combination of the medical Tinetti evaluation table, and the evaluation result is displayed to a user through a human-computer interaction interface. The invention further discloses a method for human body gait evaluation conducted through the system. According to the system and method for human body gait evaluation, human body gait information can be monitored and analyzed, the evaluation result is obtained, falling-down risks of old people are particularly evaluated in an intelligent mode, the result is provided in real time, the human body gait information is evaluated in an intelligent mode, evaluation of the falling-down risks of the old people is facilitated, the structure is simple, cost is low, and operation is convenient.
Description
Technical field
The present invention relates to wireless network data and merge and digital signal processing technique field, especially a kind of body gait evaluating system and method, assess for the risk of falling to old people.
Background technology
Foot characteristic information when body gait information is the daily walking of people, generally includes the features such as the length of initial gait, paces and height, the gait uniformity, gait seriality, walking distance, walking irrelevance.By analyzing these data, can evaluate and test body gait, disclose the abnormal link of body gait, influence factor and the situation such as fall is assessed.Traditional gait evaluating method is to walk by testee and the tester ， hall that stands together, and detects by an unaided eye to realize.This method influence factor is more, and intelligent degree is inadequate, and implements inconvenience.
Publication number is that a kind of human gait analysis system has been described in the patent application of CN202086479, it walks pad by electronics and gathers body gait feature, and the body gait feature collecting is converted into data signal, the data signal padding by data analysis set-up analytical electron step reflects body gait feature.But this system uses more complicated, not portable, and can not reflect the three-dimensional parameter of body gait, so function is limited.
Publication number is that a kind of walking speed measurement detecting based on pedestrian's gait and the system and method for transmission have been described in the patent application of CN101694499, this system is by two axle acceleration perception body gait acceleration informations, and therefrom extract gait feature, detect motion instantaneous velocity, average speed, displacement, movement time and mobile step number.The method has only provided the limited parameter relevant to gait, length as for initial gait information, paces cannot provide with height, the uniformity of gait, the irrelevance of the seriality of gait, straight line moving etc., and these parameters are important parameters of gait evaluation and test.
Summary of the invention
In order to realize intelligentized gait evaluation and test, the invention provides a kind of body gait evaluating system and method, the present invention not only can monitoring human gait information, but also can analyze body gait information and provide evaluation result, can be used for special population to carry out gait evaluation.The present invention is intelligent evaluation and test, goes out in real time result and with low cost, simple to operate.
According to an aspect of the present invention, propose a kind of body gait evaluating system, it is characterized in that, this system comprises: information acquisition module, and wireless communication module and data analysis terminal, wherein,
Described information acquisition module is in order to measure and to process the three-dimensional acceleration signal of both feet and waist, by described wireless communication module, receive the instruction that described data analysis terminal sends, and the three-dimensional acceleration signal after processing is sent to described data analysis terminal by described wireless communication module;
Described data analysis terminal is for carrying out data interaction and the three-dimensional acceleration signal after the wireless processing of uploading of described information acquisition module is analyzed to gait feature amount and the gait information that obtains object to be evaluated with described information acquisition module, in Tinetti evaluation and test table on integrative medicine, determine that whether the gait information of object to be evaluated is normal, and evaluation result is presented to user by human-computer interaction interface;
Described wireless communication module is in order to carry out the exchanges data between described signal acquisition module and described data analysis terminal;
Described information acquisition module is comprised of three information gathering nodes and date processing submodule, described three information gathering nodes are separately fixed at by the both feet of evaluating object and waist, wherein, described information gathering node is for measuring by the three-dimensional acceleration signal at evaluation and test position; Described date processing submodule is for carrying out filtering, time-frequency conversion and Integral Processing to described three-dimensional acceleration signal.
According to a further aspect in the invention, the present invention also proposes a kind of method that right to use requires the body gait evaluating system described in 1 to evaluate and test body gait, it is characterized in that, the method comprises the following steps:
Step 1, before body gait is evaluated and tested, is separately fixed at three information gathering nodes by the both feet of evaluating object and waist with binder, guarantees that these three information gathering nodes can not slide with respect to fixing position in gait evaluation and test process;
Step 2, opens device power supply (DPS), allows by evaluating object normal stand a period of time, waits for and sends evaluation and test preparation instruction by data analysis terminal;
Step 3, described data analysis terminal is sent evaluation and test preparation instruction, described information acquisition module receives after described evaluation and test preparation instruction, carry out initialization operation, determine the original state of information gathering node, and initial state information is sent to data analysis terminal, described initial state information comprises: the initial output of the temporal information in current information acquisition module and acceleration signal;
Step 4, evaluation and test person is errorless rear to sent evaluation and test sign on by evaluating object in definite information gathering node initial state information, by evaluating object receive evaluation and test sign on after, beginning is along straight line moving, the node of information gathering is simultaneously received the acquisition instructions that described data analysis terminal is sent, start the three-dimensional acceleration signal by evaluating object to gather, the signal collecting stores to described data analysis terminal by wireless communication module real-time Transmission after RC filtering and the processing of date processing submodule;
Step 5, by evaluating object when straight line moving one segment distance, described data analysis terminal is sent evaluation and test END instruction, the collection that signals collecting node is received stop signal after this instruction with upload, shutdown signal acquisition node power supply simultaneously, by information gathering node from being unloaded with it by evaluating object;
Step 6, described data analysis terminal obtains gait feature amount and the gait information of object to be evaluated to the gait data analysis by evaluating object receiving in evaluation and test process, Tinetti evaluation and test table on integrative medicine determines that whether the gait information of object to be evaluated is normal, and by the human-computer interaction interface of described data analysis terminal, evaluation result is presented to by evaluating object.
The invention has the beneficial effects as follows, can intelligentized evaluation and test body gait information, convenient the risk of falling of the special populations such as old man to be assessed, it is simple in structure, with low cost, easy to operate.
Accompanying drawing explanation
Fig. 1 is the structural representation of human body gait evaluating system of the present invention.
Fig. 2 is the flow chart of human body gait evaluating method of the present invention.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 1 is the structural representation of human body gait evaluating system of the present invention, and as shown in Figure 1, body gait evaluating system of the present invention comprises: information acquisition module, wireless communication module and data analysis terminal.
Wherein, described information acquisition module is in order to measure and to process the three-dimensional acceleration signal of both feet and waist, by described wireless communication module, receive the instruction that described data analysis terminal sends, and the three-dimensional acceleration signal after processing is sent to described data analysis terminal by described wireless communication module;
Described information acquisition module is by three information gathering nodes: isolated node 1, isolated node 2, isolated node 3, and date processing submodule forms, described information gathering node is for measuring by the three-dimensional acceleration signal at evaluation and test position; Described date processing submodule is for carrying out filtering, time-frequency conversion and Integral Processing to described three-dimensional acceleration signal.Particularly, described three information gathering nodes are separately fixed at by the both feet of evaluating object and waist, and each information gathering node comprises three axis accelerometer and peripheral circuit and radio receiving transmitting module; Wherein, described three axis accelerometer is for measuring by the three-dimensional acceleration signal at evaluation and test position; Described peripheral circuit comprises power-supplying circuit and hardware signal processing circuit, described power-supplying circuit is for powering to three axis accelerometer, described hardware signal processing circuit carries out capacitance resistance RC filtering for the three-dimensional acceleration signal that three axis accelerometer is measured, with filtering noise wherein.
Described three information gathering nodes send to described date processing submodule by the three-dimensional acceleration signal through RC filtering, described date processing submodule carries out the processing such as filtering, time-frequency conversion, integration to the three-dimensional acceleration signal receiving, so that next described data analysis terminal can obtain being evaluated and tested position in the three-dimensional acceleration signal from processing, be the gait information at the position at information gathering node place, and then the three-dimensional acceleration signal after processing is sent it back to corresponding information gathering node;
Wherein, three-dimensional acceleration signal being carried out to filtering is mainly to adopt low-pass filtering algorithm, the high-frequency noise interfering signal in elimination three-dimensional acceleration signal; Time-frequency conversion is mainly that the time domain acceleration signal through low-pass filtering is become to frequency-region signal, obtains the frequency information of acceleration signal; Integral Processing is mainly to carrying out through the acceleration signal of low-pass filtering once and quadratic integral computing, obtain being evaluated and tested speed and the displacement information at position, further, acceleration signal is after filtering carried out respectively to quadratic integral computing in the horizontal and vertical directions, can draw object to be evaluated displacement in the horizontal and vertical directions.Described low-pass filtering algorithm, time-frequency conversion algorithm and Integral Processing algorithm are all very common in the prior art, and therefore not to repeat here.
Described radio receiving transmitting module, for the three-dimensional acceleration signal returning after described date processing submodule is processed, by described wireless communication module, send to described data analysis terminal, and receive by described wireless communication module feedback and the control instruction that described data analysis terminal is sent.
Described data analysis terminal is for carrying out data interaction and the three-dimensional acceleration signal after the wireless processing of uploading of described information acquisition module is analyzed to gait feature amount and the gait information that obtains object to be evaluated with described information acquisition module, the evaluation and test information such as bipod relative position in the Tinetti evaluation and test table on integrative medicine, whether paces are consistent, whether paces are even determine that whether the gait information of object to be evaluated is normal, and evaluation result is presented to user by human-computer interaction interface.
Three-dimensional acceleration signal after processing is analyzed to the gait feature amount and the gait information that obtain object to be evaluated to be comprised: the frequency information that passes through the three-dimensional acceleration signal that described time-frequency conversion obtains according to three-dimensional acceleration signal obtains cadence and walking period, signal according to three-dimensional acceleration signal after a described Integral Processing obtains leg speed, it is wide that signal according to three-dimensional acceleration signal after described quadratic integral is processed obtains step-length, stride and step, further, signal according to three-dimensional acceleration signal after the quadratic integral in horizontal direction is processed obtains step-length and step is wide, and the signal according to three-dimensional acceleration signal after the quadratic integral in vertical direction is processed obtains stride, whether the initial gait information that can obtain object to be evaluated through simple mathematical operation from gait feature amount obtained above is (such as hesitating, the information such as step whether have been attempted just stepping several times), the length of paces and height (can be obtained by step-length and stride), the uniformity of gait (can be obtained by cadence), the seriality of gait (can be obtained by leg speed), the irrelevance of straight line moving (can obtain by step is wide), the gait information such as walking distance (can be obtained by leg speed and walking period).
Described data analysis terminal is traditional PC, smart mobile phone or panel computer.
Described wireless communication module is in order to carry out the exchanges data between described signal acquisition module and described data analysis terminal, and described wireless communication module can be the cordless communication networks such as WLAN (Bluetooth, ZigBee etc.).
The invention also proposes a kind of method of using described body gait evaluating system to evaluate and test body gait, the method comprises the following steps:
Step 1, before body gait is evaluated and tested, with binder, three information gathering nodes are separately fixed on the San Ge position shown in Fig. 1, by the both feet of evaluating object and waist, guarantee that these three information gathering nodes position fixing with respect to node in gait evaluation and test process can not slide;
Step 2, opens device power supply (DPS), allows by evaluating object normal stand a period of time, such as 30 seconds, waits for and sends evaluation and test preparation instruction by data analysis terminal;
Step 3, described data analysis terminal is sent evaluation and test preparation instruction, and described information acquisition module receives after described evaluation and test preparation instruction, carries out initialization operation, determines the original state of information gathering node, and initial state information is sent to data analysis terminal;
Described initial state information comprises temporal information in current information acquisition module and the initial output of acceleration signal.
Step 4, evaluation and test person is errorless rear to sent evaluation and test sign on by evaluating object in definite information gathering node initial state information, by evaluating object receive evaluation and test sign on after, beginning is along straight line moving, the node of information gathering is simultaneously received the acquisition instructions that described data analysis terminal is sent, start the three-dimensional acceleration signal by evaluating object to gather, the signal collecting stores to described data analysis terminal by wireless communication module real-time Transmission after date processing submodule is processed;
Described date processing submodule carries out filtering, time-frequency conversion and integration to being treated to of described three-dimensional acceleration signal to described three-dimensional acceleration signal.
Wherein, three-dimensional acceleration signal being carried out to filtering is mainly to adopt low-pass filtering algorithm, the high-frequency noise interfering signal in elimination three-dimensional acceleration signal; Time-frequency conversion is mainly that time domain acceleration signal is after filtering become to frequency-region signal, obtains the frequency information of acceleration signal; Integral Processing is mainly that acceleration signal is after filtering carried out once and quadratic integral computing, obtain speed and displacement information, further, acceleration signal is after filtering carried out respectively to quadratic integral computing in the horizontal and vertical directions, can draw object to be evaluated displacement in the horizontal and vertical directions.
Further, utilizing before date processing submodule processes three-dimensional acceleration signal, also comprise described three-dimensional acceleration signal is carried out to RC filtering, with the step of filtering noise wherein.Step 5, by evaluating object when straight line moving one segment distance, such as 50 meters, described data analysis terminal is sent evaluation and test END instruction, the collection that signals collecting node is received stop signal after this instruction with upload, shutdown signal acquisition node power supply simultaneously, by information gathering node from being unloaded with it by evaluating object;
Step 6, described data analysis terminal obtains gait feature amount and the gait information of object to be evaluated to the gait data analysis by evaluating object receiving in evaluation and test process, Tinetti evaluation and test table on integrative medicine determines that whether the gait information of object to be evaluated is normal, and by the human-computer interaction interface of described data analysis terminal, evaluation result is presented to by evaluating object.
The gait feature amount and the gait information that described gait data analysis are obtained to object to be evaluated comprise: the frequency information of the three-dimensional acceleration signal obtaining through described time-frequency conversion according to three-dimensional acceleration signal obtains cadence and walking period, signal according to three-dimensional acceleration signal after a described Integral Processing obtains leg speed, it is wide that signal according to three-dimensional acceleration signal after described quadratic integral is processed obtains step-length, stride and step, further, signal according to three-dimensional acceleration signal after the quadratic integral in horizontal direction is processed obtains step-length and step is wide, and the signal according to three-dimensional acceleration signal after the quadratic integral in vertical direction is processed obtains stride, whether the initial gait information that can obtain object to be evaluated through simple mathematical operation from gait feature amount obtained above is (such as hesitating, the information such as step whether have been attempted just stepping several times), the length of paces and height (can be obtained by step-length and stride), the uniformity of gait (can be obtained by cadence), the seriality of gait (can be obtained by leg speed), the irrelevance of straight line moving (can obtain by step is wide), the gait information such as walking distance (can be obtained by leg speed and walking period).
Described Tinetti evaluation and test table comprises the evaluation and test information such as bipod relative position, whether paces are consistent, whether paces are even.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a body gait evaluating system, is characterized in that, this system comprises: information acquisition module, and wireless communication module and data analysis terminal, wherein,
Described information acquisition module is in order to measure and to process the three-dimensional acceleration signal of both feet and waist, by described wireless communication module, receive the instruction that described data analysis terminal sends, and the three-dimensional acceleration signal after processing is sent to described data analysis terminal by described wireless communication module;
Described data analysis terminal is for carrying out data interaction and the three-dimensional acceleration signal after the wireless processing of uploading of described information acquisition module is analyzed to gait feature amount and the gait information that obtains object to be evaluated with described information acquisition module, in Tinetti evaluation and test table on integrative medicine, determine that whether the gait information of object to be evaluated is normal, and evaluation result is presented to user by human-computer interaction interface;
Described wireless communication module is in order to carry out the exchanges data between described signal acquisition module and described data analysis terminal;
Described information acquisition module is comprised of three information gathering nodes and date processing submodule, described three information gathering nodes are separately fixed at by the both feet of evaluating object and waist, wherein, described information gathering node is for measuring by the three-dimensional acceleration signal at evaluation and test position; Described date processing submodule is for carrying out filtering, time-frequency conversion and Integral Processing to described three-dimensional acceleration signal.
2. system according to claim 1, is characterized in that, each information gathering node comprises three axis accelerometer and peripheral circuit and radio receiving transmitting module; Wherein,
Described three axis accelerometer is for measuring by the three-dimensional acceleration signal at evaluation and test position;
Described peripheral circuit comprises power-supplying circuit and hardware signal processing circuit, described power-supplying circuit is for three axis accelerometer is powered, and described hardware signal processing circuit carries out capacitance resistance RC filtering for the three-dimensional acceleration signal that three axis accelerometer is measured;
Described information gathering node sends to described date processing submodule by the three-dimensional acceleration signal through RC filtering, after described date processing submodule is processed the three-dimensional acceleration signal receiving, then the three-dimensional acceleration signal after processing is sent it back to corresponding information gathering node;
Described radio receiving transmitting module sends to described data analysis terminal for the three-dimensional acceleration signal returning after described date processing submodule is processed by described wireless communication module, and receives by described wireless communication module feedback and the control instruction that described data analysis terminal is sent.
3. system according to claim 1, is characterized in that, filtering, time-frequency conversion and Integral Processing that described date processing submodule carries out described three-dimensional acceleration signal are further:
Adopt low-pass filtering algorithm, the high-frequency noise interfering signal in elimination three-dimensional acceleration signal;
Time domain acceleration signal through low-pass filtering is become to frequency-region signal, obtain the frequency information of acceleration signal;
To acceleration signal after filtering carry out once with level, vertical direction on quadratic integral computing, obtain being evaluated and tested the displacement in the speed at position and level, vertical direction.
4. system according to claim 3, is characterized in that, the three-dimensional acceleration signal after described processing is analyzed to the gait feature amount and the gait information that obtain object to be evaluated and further comprise:
According to the frequency information of described acceleration signal, obtain cadence and walking period;
Signal according to three-dimensional acceleration signal after a described Integral Processing obtains leg speed;
Signal according to three-dimensional acceleration signal after the quadratic integral in horizontal direction is processed obtains step-length and step is wide;
Signal according to three-dimensional acceleration signal after the quadratic integral in vertical direction is processed obtains stride;
From these gait feature amounts that obtain, analyze the gait information that obtains object to be evaluated: the length of initial gait information, paces and height, the uniformity of gait, the irrelevance of the seriality of gait, straight line moving, walking distance.
5. system according to claim 1, is characterized in that, described Tinetti evaluation and test table comprises following evaluation and test information: whether bipod relative position, paces be consistent, whether paces are even.
6. system according to claim 1, is characterized in that, described data analysis terminal is traditional PC, smart mobile phone or panel computer; Described wireless communication module is cordless communication network.
7. right to use requires the method that the body gait evaluating system described in 1 is evaluated and tested body gait, it is characterized in that, the method comprises the following steps:
Step 1, before body gait is evaluated and tested, is separately fixed at three information gathering nodes by the both feet of evaluating object and waist with binder, guarantees that these three information gathering nodes can not slide with respect to fixing position in gait evaluation and test process;
Step 2, opens device power supply (DPS), allows by evaluating object normal stand a period of time, waits for and sends evaluation and test preparation instruction by data analysis terminal;
Step 3, described data analysis terminal is sent evaluation and test preparation instruction, described information acquisition module receives after described evaluation and test preparation instruction, carry out initialization operation, determine the original state of information gathering node, and initial state information is sent to data analysis terminal, described initial state information comprises: the initial output of the temporal information in current information acquisition module and acceleration signal;
Step 4, evaluation and test person is errorless rear to sent evaluation and test sign on by evaluating object in definite information gathering node initial state information, by evaluating object receive evaluation and test sign on after, beginning is along straight line moving, the node of information gathering is simultaneously received the acquisition instructions that described data analysis terminal is sent, start the three-dimensional acceleration signal by evaluating object to gather, the signal collecting stores to described data analysis terminal by wireless communication module real-time Transmission after RC filtering and the processing of date processing submodule;
Step 5, by evaluating object when straight line moving one segment distance, described data analysis terminal is sent evaluation and test END instruction, the collection that signals collecting node is received stop signal after this instruction with upload, shutdown signal acquisition node power supply simultaneously, by information gathering node from being unloaded with it by evaluating object;
Step 6, described data analysis terminal obtains gait feature amount and the gait information of object to be evaluated to the gait data analysis by evaluating object receiving in evaluation and test process, Tinetti evaluation and test table on integrative medicine determines that whether the gait information of object to be evaluated is normal, and by the human-computer interaction interface of described data analysis terminal, evaluation result is presented to by evaluating object.
8. method according to claim 7, is characterized in that, described date processing submodule carries out filtering, time-frequency conversion and integration to being treated to of described three-dimensional acceleration signal to described three-dimensional acceleration signal, wherein,
Described being filtered into, adopts low-pass filtering algorithm, the high-frequency noise interfering signal in elimination three-dimensional acceleration signal;
Described time-frequency conversion is, the time domain acceleration signal through low-pass filtering is become to frequency-region signal, obtains the frequency information of acceleration signal;
Described integration is, to acceleration signal after filtering carry out once with level, vertical direction on quadratic integral computing, obtain being evaluated and tested the displacement in the speed at position and level, vertical direction.
9. method according to claim 8, is characterized in that, in described step 6, the gait feature amount and the gait information that described gait data analysis are obtained to object to be evaluated further comprise:
According to the frequency information of described acceleration signal, obtain cadence and walking period;
Signal according to three-dimensional acceleration signal after a described Integral Processing obtains leg speed;
Signal according to three-dimensional acceleration signal after the quadratic integral in horizontal direction is processed obtains step-length and step is wide;
Signal according to three-dimensional acceleration signal after the quadratic integral in vertical direction is processed obtains stride;
From these gait feature amounts that obtain, analyze the gait information that obtains object to be evaluated: the length of initial gait information, paces and height, the uniformity of gait, the irrelevance of the seriality of gait, straight line moving, walking distance.
10. method according to claim 7, is characterized in that, described Tinetti evaluation and test table comprises following evaluation and test information: whether bipod relative position, paces be consistent, whether paces are even.
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