CN103505219B - A kind of body gait evaluating system and method - Google Patents
A kind of body gait evaluating system and method Download PDFInfo
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- CN103505219B CN103505219B CN201210209092.5A CN201210209092A CN103505219B CN 103505219 B CN103505219 B CN 103505219B CN 201210209092 A CN201210209092 A CN 201210209092A CN 103505219 B CN103505219 B CN 103505219B
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Abstract
The invention discloses a kind of body gait evaluating system and method, this system comprises: information acquisition module, wireless communication module and data analysis terminal.Information acquisition module is measured and process is double-legged and the three-dimensional acceleration signal of waist, and the signal after process is sent to data analysis terminal by wireless communication module; Data analysis terminal is analyzed the wireless signal uploaded, and the Tinetti evaluation and test table on integrative medicine provides evaluation result, and presents to user by human-computer interaction interface.The present invention also discloses a kind of method using described evaluating system to evaluate and test body gait.The present invention can not only monitoring human gait information, and can analyze body gait information and provide evaluation result, especially can carry out intelligentized assessment to Falls in Old People risk.The present invention can provide result in real time, intelligentized evaluation and test body gait information, conveniently assesses the fall risk of the special populations such as old man, and its structure is simple, with low cost, easy to operate.
Description
Technical field
The present invention relates to wireless network data to merge and digital signal processing technique field, especially a kind of body gait evaluating system and method, for assessing the fall risk of old people.
Background technology
Foot characteristic information when body gait information is people's daily walking, generally includes initial gait, the length of paces and the feature such as height, the gait uniformity, gait seriality, walking distance, walking irrelevance.By analyzing these data, can evaluate and test body gait, disclosing the link of body gait exception, influence factor and the situation such as to fall is assessed.Traditional gait evaluating method is stood together by testee and tester, in hall walking, detects by an unaided eye to realize.This method influence factor is more, and intelligence degree is inadequate, and implements inconvenience.
Publication number is that the patent application of CN202086479 describes a kind of human gait analysis system, it gathers body gait feature by electronics step pad, and the body gait feature collected is converted into data signal, reflect body gait feature by the data signal of data analysis set-up analytical electron step pad.But it is not this system uses more complicated, portable, and the three-dimensional parameter of body gait can not be reflected, so function is limited.
Publication number is that the patent application of CN101694499 describes a kind of walking speed measurement of detecting based on pedestrian's gait and the system and method for transmission, 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 only gives the limited parameter relevant to gait, length as initial gait information, paces cannot provide with height, the uniformity of gait, the seriality of gait, the irrelevance etc. of straight line moving, and these parameters are important parameters of gait evaluation and test.
Summary of the invention
In order to realize the evaluation and test of intelligentized gait, the invention provides a kind of body gait evaluating system and method, the present invention can not only monitoring human gait information, but also can analyze body gait information and provide evaluation result, can be used for carrying out gait evaluation to special population.The present invention is intelligent evaluation and test, goes out result and with low cost, simple to operate in real time.
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, 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, received the instruction of described data analysis terminal transmission by described wireless communication module, and the three-dimensional acceleration signal after process is sent to described data analysis terminal by described wireless communication module;
Described data analysis terminal is used for carrying out data interaction with described information acquisition module and the three-dimensional acceleration signal after the wireless process of uploading of described information acquisition module being analyzed to the gait feature amount and gait information that obtain object to be evaluated, determine in Tinetti evaluation and test table on integrative medicine 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 made up of three information collection node and date processing submodule, described three information collection node are separately fixed at by the both feet of evaluating object and waist, wherein, described information collection node is for measuring by the three-dimensional acceleration signal at evaluation and test position; Described date processing submodule is used 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 using the body gait evaluating system described in claim 1 to evaluate and test body gait, and it is characterized in that, the method comprises the following steps:
Step 1, before evaluating and testing body gait, is separately fixed at three information collection node by the both feet of evaluating object and waist with binder, ensures that these three information collection node can not be slided relative to fixed 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 sends evaluation and test preparation instruction, after described information acquisition module receives described evaluation and test preparation instruction, perform initialization operation, the original state of comformed information acquisition 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 sends evaluation and test sign on to by evaluating object afterwards comformed information acquisition node initial state information is errorless, by evaluating object after receiving evaluation and test sign on, start linearly to walk, information collection node receives the acquisition instructions that described data analysis terminal sends simultaneously, start to gather by the three-dimensional acceleration signal of evaluating object, the signal collected stores to described data analysis terminal by wireless communication module real-time Transmission after RC filtering and the process of date processing submodule;
Step 5, by evaluating object when straight line moving one segment distance, described data analysis terminal sends evaluation and test END instruction, after signals collecting node receives this instruction stop signal collection with upload, shutdown signal acquisition node power supply, unloads from by evaluating object by information collection node with it simultaneously;
Step 6, described data analysis terminal is to the gait feature amount and the gait information that are obtained object to be evaluated by the gait data analysis of evaluating object that receive 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 is presented to evaluation result by evaluating object by the human-computer interaction interface of described data analysis terminal.
The invention has the beneficial effects as follows, can intelligentized evaluation and test body gait information, conveniently assess the fall risk of old man's special population of etc.ing, its structure is simply, with low cost, easy to operate.
Accompanying drawing explanation
Fig. 1 is the structural representation of body gait evaluating system of the present invention.
Fig. 2 is the flow chart of body gait evaluating method of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, 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 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, received the instruction of described data analysis terminal transmission by described wireless communication module, and the three-dimensional acceleration signal after process is sent to described data analysis terminal by described wireless communication module;
Described information acquisition module is by three information collection node: isolated node 1, isolated node 2, isolated node 3, and date processing submodule composition, and described information collection node is for measuring by the three-dimensional acceleration signal at evaluation and test position; Described date processing submodule is used for carrying out filtering, time-frequency conversion and Integral Processing to described three-dimensional acceleration signal.Particularly, described three information collection node are separately fixed at by the both feet of evaluating object and waist, and each information collection node comprises three axis accelerometer and peripheral circuit thereof 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 used for powering to three axis accelerometer, described hardware signal processing circuit is used for carrying out capacitance resistance RC filtering, with filtering noise wherein to the three-dimensional acceleration signal that three axis accelerometer measurement obtains.
Three-dimensional acceleration signal through RC filtering is sent to described date processing submodule by described three information collection node, described date processing submodule carries out the process such as filtering, time-frequency conversion, integration to the three-dimensional acceleration signal received, so that following described data analysis terminal can obtain being evaluated and tested position from the three-dimensional acceleration signal after process, the i.e. gait information at the position at information collection node place, and then the three-dimensional acceleration signal after process is sent it back corresponding information collection node;
Wherein, filtering is carried out to three-dimensional acceleration signal and mainly adopts 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 mainly become frequency-region signal by time-frequency conversion, obtains the frequency information of acceleration signal; Integral Processing mainly to the acceleration signal through low-pass filtering carry out once with quadratic integral computing, obtain being evaluated and tested the speed at position and displacement information, further, respectively quadratic integral computing is carried out in the horizontal and vertical directions to acceleration signal after filtering, object to be evaluated displacement in the horizontal and vertical directions can be drawn.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 returned after the process of described date processing submodule is sent to described data analysis terminal by described wireless communication module, and receive by described wireless communication module the feedback and control instruction that described data analysis terminal sends.
Described data analysis terminal is used for carrying out data interaction with described information acquisition module and the three-dimensional acceleration signal after the wireless process of uploading of described information acquisition module being analyzed to the gait feature amount and gait information that obtain object to be evaluated, the evaluation and test information such as whether bipod relative position in the Tinetti evaluation and test table on integrative medicine, 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.
The gait feature amount that obtains object to be evaluated is analyzed to the three-dimensional acceleration signal after process and gait information comprises: the frequency information of the three-dimensional acceleration signal obtained through described time-frequency conversion according to three-dimensional acceleration signal obtains cadence and walking period, leg speed is obtained according to the signal of three-dimensional acceleration signal after a described Integral Processing, step-length, stride and step is obtained wide according to the signal of three-dimensional acceleration signal after described quadratic integral process, further, obtain step-length according to the signal of three-dimensional acceleration signal after the quadratic integral process in horizontal direction and walk wide, obtaining stride according to the signal of three-dimensional acceleration signal after the quadratic integral process in vertical direction, whether the initial gait information that can obtain object to be evaluated through simple mathematical operation from gait feature amount obtained above (such as hesitates, whether attempt just stepping the information such as step several times), length and the height (can be obtained by step-length and stride) of paces, the uniformity (can be obtained by cadence) of gait, the seriality (can be obtained by leg speed) of gait, the irrelevance (can obtain by step is wide) of straight line moving, 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 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 collection node are separately fixed on the position of three shown in Fig. 1, namely by the both feet of evaluating object and waist, ensure can not to slide in the position that these three information collection node are fixed relative to node in gait evaluation and test process;
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 sends evaluation and test preparation instruction, after described information acquisition module receives described evaluation and test preparation instruction, performs initialization operation, the original state of comformed information acquisition node, and initial state information is sent to data analysis terminal;
Described initial state information comprises the initial output of temporal information in current information acquisition module and acceleration signal.
Step 4, evaluation and test person sends evaluation and test sign on to by evaluating object afterwards comformed information acquisition node initial state information is errorless, by evaluating object after receiving evaluation and test sign on, start linearly to walk, information collection node receives the acquisition instructions that described data analysis terminal sends simultaneously, start to gather by the three-dimensional acceleration signal of evaluating object, the signal collected stores to described data analysis terminal by wireless communication module real-time Transmission after the process of date processing submodule;
Described date processing submodule to the process of described three-dimensional acceleration signal for carry out filtering, time-frequency conversion and integration to described three-dimensional acceleration signal.
Wherein, filtering is carried out to three-dimensional acceleration signal and mainly adopts low-pass filtering algorithm, the high-frequency noise interfering signal in elimination three-dimensional acceleration signal; Time domain acceleration signal after filtering is mainly become frequency-region signal by time-frequency conversion, obtains the frequency information of acceleration signal; Integral Processing mainly to acceleration signal after filtering carry out once with quadratic integral computing, obtain speed and displacement information, further, respectively quadratic integral computing is carried out in the horizontal and vertical directions to acceleration signal after filtering, object to be evaluated displacement in the horizontal and vertical directions can be drawn.
Further, utilizing before date processing submodule processes three-dimensional acceleration signal, also comprising and RC filtering is carried out, with the step of filtering noise wherein to described three-dimensional acceleration signal.Step 5, by evaluating object when straight line moving one segment distance, such as 50 meters, described data analysis terminal sends evaluation and test END instruction, after signals collecting node receives this instruction stop signal collection with upload, shutdown signal acquisition node power supply, unloads from by evaluating object by information collection node with it simultaneously;
Step 6, described data analysis terminal is to the gait feature amount and the gait information that are obtained object to be evaluated by the gait data analysis of evaluating object that receive 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 is presented to evaluation result by evaluating object by the human-computer interaction interface of described data analysis terminal.
The gait feature amount of object to be evaluated is obtained to described gait data analysis and gait information comprises: the frequency information of the three-dimensional acceleration signal obtained through described time-frequency conversion according to three-dimensional acceleration signal obtains cadence and walking period, leg speed is obtained according to the signal of three-dimensional acceleration signal after a described Integral Processing, step-length, stride and step is obtained wide according to the signal of three-dimensional acceleration signal after described quadratic integral process, further, obtain step-length according to the signal of three-dimensional acceleration signal after the quadratic integral process in horizontal direction and walk wide, obtaining stride according to the signal of three-dimensional acceleration signal after the quadratic integral process in vertical direction, whether the initial gait information that can obtain object to be evaluated through simple mathematical operation from gait feature amount obtained above (such as hesitates, whether attempt just stepping the information such as step several times), length and the height (can be obtained by step-length and stride) of paces, the uniformity (can be obtained by cadence) of gait, the seriality (can be obtained by leg speed) of gait, the irrelevance (can obtain by step is wide) of straight line moving, 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; be 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 amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a body gait evaluating system, is characterized in that, this system 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, received the instruction of described data analysis terminal transmission by described wireless communication module, and the three-dimensional acceleration signal after process is sent to described data analysis terminal by described wireless communication module;
Described data analysis terminal is used for carrying out data interaction with described information acquisition module and the three-dimensional acceleration signal after the wireless process of uploading of described information acquisition module being analyzed to the gait feature amount and gait information that obtain object to be evaluated, determine in Tinetti evaluation and test table on integrative medicine 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 information acquisition module and described data analysis terminal;
Described information acquisition module is made up of three information collection node and date processing submodule, described three information collection node are separately fixed at by the both feet of evaluating object and waist, wherein, described information collection node is for measuring by the three-dimensional acceleration signal at evaluation and test position; Described date processing submodule is used for carrying out filtering, time-frequency conversion and Integral Processing to described three-dimensional acceleration signal; Each information collection node comprises three axis accelerometer and peripheral circuit thereof 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 used for powering to three axis accelerometer, and described hardware signal processing circuit is used for carrying out capacitance resistance RC filtering to the three-dimensional acceleration signal that three axis accelerometer measurement obtains;
Three-dimensional acceleration signal through RC filtering is sent to described date processing submodule by described information collection node, after described date processing submodule processes the three-dimensional acceleration signal received, then the three-dimensional acceleration signal after process is sent it back corresponding information collection node;
Described radio receiving transmitting module is used for the three-dimensional acceleration signal returned after the process of described date processing submodule to be sent to described data analysis terminal by described wireless communication module, and receives by described wireless communication module the feedback and control instruction that described data analysis terminal sends.
2. system according to claim 1, is characterized in that, the filtering that described date processing submodule carries out described three-dimensional acceleration signal, time-frequency conversion and Integral Processing 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 frequency-region signal, obtains the frequency information of acceleration signal;
Quadratic integral computing in an integral operation and level, vertical direction is carried out to acceleration signal after filtering, obtains by the displacement evaluated and tested in the speed at position and level, vertical direction.
3. system according to claim 2, is characterized in that, analyzes the gait feature amount that obtains object to be evaluated and gait information comprises further to the three-dimensional acceleration signal after described process:
Cadence and walking period is obtained according to the frequency information of described acceleration signal;
Leg speed is obtained according to the signal of three-dimensional acceleration signal after a described Integral Processing;
Obtain step-length according to the signal of three-dimensional acceleration signal after the quadratic integral process in horizontal direction and walk wide;
Stride is obtained according to the signal of three-dimensional acceleration signal after the quadratic integral process in vertical direction;
The gait information obtaining object to be evaluated is analyzed: length and height, the uniformity of gait, the seriality of gait, the irrelevance of straight line moving, the walking distance of initial gait information, paces from these gait feature amounts obtained.
4. 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 are consistent, whether paces are even.
5. 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.
6. use the method that the body gait evaluating system described in claim 1 is evaluated and tested body gait, it is characterized in that, the method comprises the following steps:
Step 1, before evaluating and testing body gait, is separately fixed at three information collection node by the both feet of evaluating object and waist with binder, ensures that these three information collection node can not be slided relative to fixed 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 sends evaluation and test preparation instruction, after described information acquisition module receives described evaluation and test preparation instruction, perform initialization operation, the original state of comformed information acquisition 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 sends evaluation and test sign on to by evaluating object afterwards comformed information acquisition node initial state information is errorless, by evaluating object after receiving evaluation and test sign on, start linearly to walk, information collection node receives the acquisition instructions that described data analysis terminal sends simultaneously, start to gather by the three-dimensional acceleration signal of evaluating object, the signal collected stores to described data analysis terminal by wireless communication module real-time Transmission after RC filtering and the process of date processing submodule;
Step 5, by evaluating object when straight line moving one segment distance, described data analysis terminal sends evaluation and test END instruction, after signals collecting node receives this instruction stop signal collection with upload, shutdown signal acquisition node power supply, unloads from by evaluating object by information collection node with it simultaneously;
Step 6, described data analysis terminal is to the gait feature amount and the gait information that are obtained object to be evaluated by the gait data analysis of evaluating object that receive 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 is presented to evaluation result by evaluating object by the human-computer interaction interface of described data analysis terminal.
7. method according to claim 6, is characterized in that, described date processing submodule to the process of described three-dimensional acceleration signal for carry out filtering, time-frequency conversion and integration to described three-dimensional acceleration signal, wherein,
Describedly to be filtered into, to adopt 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 frequency-region signal, obtains the frequency information of acceleration signal;
Described integration is, carries out the quadratic integral computing in an integral operation and level, vertical direction to acceleration signal after filtering, obtains by the displacement evaluated and tested in the speed at position and level, vertical direction.
8. method according to claim 7, is characterized in that, in described step 6, obtains the gait feature amount of object to be evaluated and gait information comprises further to described gait data analysis:
Cadence and walking period is obtained according to the frequency information of described acceleration signal;
Leg speed is obtained according to the signal of three-dimensional acceleration signal after a described Integral Processing;
Obtain step-length according to the signal of three-dimensional acceleration signal after the quadratic integral process in horizontal direction and walk wide;
Stride is obtained according to the signal of three-dimensional acceleration signal after the quadratic integral process in vertical direction;
The gait information obtaining object to be evaluated is analyzed: length and height, the uniformity of gait, the seriality of gait, the irrelevance of straight line moving, the walking distance of initial gait information, paces from these gait feature amounts obtained.
9. method according to claim 6, is characterized in that, described Tinetti evaluation and test table comprises following evaluation and test information: whether bipod relative position, paces are consistent, whether paces are even.
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