CN102654405B - Gait counting method and device based on acceleration sensor - Google Patents
Gait counting method and device based on acceleration sensor Download PDFInfo
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Abstract
The invention relates to a gait counting method and device based on an acceleration sensor. By adopting an identification principle of a gait waveform and accelerating and moderating processes, a waveform generated during walking of a human body is identified, thus the effect of counting gaits is achieved. The gait counting method comprises the following steps of: acquiring three or more gaits of a user in advance by using the acceleration sensor, analyzing and calculating the acquired gait data to obtain a gait vibration waveform peak value and corresponding acceleration difference average data, and setting the gait vibration waveform peak value and the corresponding acceleration difference average data as thresholds; and acquiring actual gait waveform data of the user, and if the actual gait waveform data is within a preset threshold range, recognizing that the user walks for one step forwards. The gait counting method and device based on the acceleration sensor have lower requirement for the sensor, and are accurate in counting gaits and convenient for random use of the user.
Description
Technical field
The present invention relates to a kind of step-recording method and device thereof, especially, a kind of step-recording method and device thereof based on acceleration transducer.
Background technology
Along with social development, people more and more drop into more concern to body-building.In order to guarantee the effect of body-building, people use some metering outfits conventionally, calculate amount of exercise.For example, for running, will use passometer, calculate while running the total step amount producing.
And the current normally used passometer of industry, the accelerometer based on three axles normally, its meter step algorithm principle is the eigenwert that gathers gait, as peak value and frequency etc.This passometer has following shortcoming:
1. adopt three axis accelerometer, this has relatively high expectations to sensor, and cost is also larger simultaneously;
2. for different users, the eigenwert that meter step principle gathers differs greatly, therefore meter step resultant error is larger;
3. by the vibrations of induction health, count step, the scope of wearing during use is narrower, generally need to be worn on waist and could obtain good precision around time, and its inconvenient user is arbitrarily used.
Therefore, necessary a kind of new step-recording method and the device thereof developed, overcomes defect of the prior art.
Summary of the invention
Technical matters to be solved by this invention is that existing step-recording method and device thereof, require the shortcomings such as high, cost is higher, meter step error is large and be inconvenient to use to sensor; The present invention aims to provide a kind of step-recording method and device thereof based on acceleration transducer, and it is lower to sensor requirement, the accurate and easy to use person of meter step arbitrarily uses.
In order to solve the problems of the technologies described above, technical scheme proposed by the invention is: a kind of step-recording method based on acceleration transducer, and it includes following steps:
Obtain pre-set threshold value step: use acceleration transducer to gather in advance the gait of user's 3 steps or above quantity, the gait data collecting is carried out to analytical calculation, the acceleration difference getting in gait vibrational waveform crest value and acceleration accordingly and/or moderating process is average, choose maximal value and minimum value in crest value wherein, after being made as, detect the upper of gait peak value, lower threshold values, choose the minimum and maximum acceleration difference average data in accelerator and/or moderating process, and be made as the upper of acceleration difference data in accelerator and/or moderating process, lower threshold values,
Data acquisition and comparison step: use acceleration transducer to gather user's gait Wave data, the Wave data of identifying its peak value with and accelerator and moderating process in acceleration difference data, if its peak-data and corresponding acceleration difference data thereof fall within the scope of the pre-set threshold value of setting, think user's step of having gone ahead.
Further, in different embodiments, the upper and lower threshold values of wherein setting is greater than the threshold values of initial setting.Wherein Initial Hurdle is an empirical value by the collection of a large amount of gait datas is established, and object is to filter out invalid vibration interference, improves accuracy.
Further, in different embodiments, the upper and lower threshold values of wherein setting is, added or deducted to obtain after a pre-value by the maximal value of the crest value collecting and minimum value.Wherein pre-value is also the empirical value that a large amount of gait data analyses are arranged afterwards, and object is to expand decision threshold scope, increases the accuracy of correct judgement.
Further, in different embodiments, wherein choose on the acceleration difference data of default accelerator, lower threshold values step, its for by front 3 or the above quantity of the crest value of each the step waveform collecting in advance (in different embodiments, for concrete quantity indefinite, it can be 3, 4, 5, 6, 7, 8, 9 etc.) accekeration saves as an array, for the accekeration before crest value, it is the accekeration in accelerator, by rear data, deduct previous data successively, the difference obtaining is relatively obtained to maximal value and minimum value, successively each step of pre-collection is carried out to such calculating, and acceleration difference maximal value and the minimum value of all gaits are averaged respectively, being made as gait waveform accelerates in difference, lower threshold values,
Gathering numerical value comparison step, the wherein acceleration difference data of accelerator identification, for obtaining this waveform, accelerate accordingly difference data, front and back acceleration difference in accelerator is dropped on to the number of times accelerating within the scope of the upper and lower threshold values of difference and carry out accumulated counts, be called acceleration amount, when acceleration amount is more than or equal to predetermined value, think user's step of having gone ahead.
Further, in different embodiments, wherein choose on the acceleration difference data of default moderating process, lower threshold values step, its for by rear 3 or the above quantity of the crest value of each the step waveform collecting in advance (in different embodiments, for concrete quantity indefinite, it can be 3, 4, 5, 6, 7, 8, 9 etc.) accekeration save as an array, for the accekeration after crest value, it is the accekeration in moderating process, by previous data, deduct rear data successively, the difference obtaining is relatively obtained to maximal value and minimum value, successively each step of pre-collection is carried out to such calculating, and deceleration difference maximal value and the minimum value of all gaits are averaged respectively, be made as in gait waveform deceleration difference, lower threshold values,
Gathering numerical value comparison step, the wherein acceleration difference data of moderating process identification, for obtaining this waveform difference data that slows down accordingly, the number of times that in moderating process, front and back acceleration difference drops within the scope of the upper and lower threshold values of deceleration difference is carried out to accumulated counts, be called amount of deceleration, when amount of deceleration is more than or equal to predetermined value, think user's step of having gone ahead.
Further, in different embodiments, the gait waveform that wherein acceleration transducer obtains, is a kind of by user runs, is careful, arm whipping produces waveform.
Further, in different embodiments, the gait waveform that wherein acceleration transducer obtains, is the Wave data obtaining on axle of acceleration transducer.If what use is multi-axial sensor, for the data of its each axle, can gather respectively simultaneously, data relatively after, can be using the larger axle of the crest value scope obtaining as the axle that detects gait Wave data.
Further, in different embodiments, the present invention also provides the step count set of the step-recording method based on acceleration transducer that a kind of use the present invention relates to, it includes acceleration transducer, data processing unit and data output unit, wherein acceleration transducer and data processing unit are used the step-recording method the present invention relates to obtain meter step data, and then data processing unit sends to data output device to offer user meter step data.
Further, in different embodiments, wherein acceleration transducer comprises 2 axles and/or 3 axle acceleration sensors.
Further, in different embodiments, wherein data output device comprises display device and/or sound broadcasting device.
Compared with prior art, the invention has the beneficial effects as follows:
1. the present invention adopts Wave data and the acceleration/deceleration process of detection user when walking or run to calculate step number, because people has same acceleration/deceleration process when walking or run, amplitude, frequency approach while walking than existing passometer detection user, more can adapt to the difference of different users when walking, have higher accuracy of detection;
2. the present invention can be achieved based on 2 or 3 axle acceleration sensors, better than prior art aspect hardware-dependence;
3. the present invention does not have harsh requirement to the wearing position of step count set, can be placed on trousers pocket, pocket, waistband and position on hand etc. during use, wears scope more wide in range than existing passometer, more
Being convenient to user arbitrarily uses.
Accompanying drawing explanation
Fig. 1 is the logical organization schematic diagram of the step count set that the present invention relates to.
Embodiment
Below in conjunction with accompanying drawing, describe the specific embodiment of the present invention in detail.
The invention provides a kind of step-recording method and device thereof based on acceleration transducer, it is lower to sensor requirement, the accurate and easy to use person of meter step arbitrarily uses.
The step-recording method based on acceleration transducer wherein relating to, it includes following steps: obtain pre-set threshold value step and data acquisition and comparison step.
1. obtaining pre-set threshold value step includes:
1.1 acceleration transducers gather the gait of user's 11 steps in advance, the acceleration information of the gait collecting is carried out to analytical calculation and get gait vibrational waveform crest value, choose maximal value and minimum value in these 11 crest values.
Maximal value and minimum value are added or deduct a pre-value, detect the threshold values up and down of gait peak value after the maximal value obtaining afterwards and minimum value are made as, the gait peak value falling in this peak value sensing range is effective peak.
Wherein minimum value should be more than or equal to the Initial Hurdle of initial setting, and this threshold values is an empirical value by the collection of a large amount of gait datas is established, and object is to filter out invalid vibration interference.Thereafter the pre-value relating to is also the empirical value that a large amount of gait data analyses are arranged afterwards, and object is to expand decision threshold scope, increases the number percent of correct judgement.The introducing of Initial Hurdle and pre-value can further improve accuracy.
1.2 by collect in advance each step waveform crest value front and back totally ten one accekerations save as an array, for five accekerations (accelerator) before crest value, by rear data, deduct previous data successively, obtain four differences are relatively obtained to maximal value and minimum value; For five accekerations (moderating process) after crest value, by previous data, deduct rear data successively, equally four differences are got to maximal value and minimum value.
1.3 carry out the calculating of previous step (1.2 step) successively to 11 steps of pre-collection, and maximal value and the minimum value of the acceleration difference of all gaits and deceleration difference are averaged respectively, are made as gait waveform and accelerate and the upper and lower threshold values of deceleration difference.
2. data acquisition and comparison step:
2.1 data acquisition, acceleration transducer gathers user's gait Wave data, gait data to eligible 1.1 accelerates and moderating process identification, be that front and back value in step 1.2 is subtracted each other, front and back acceleration difference in accelerator is dropped on to the number of times accelerating within the scope of the upper and lower threshold values of difference and carry out accumulated counts, be called acceleration amount; The same amount of deceleration that obtains moderating process.
2.2 data comparisons, just think if acceleration amount and amount of deceleration are more than or equal to 2 simultaneously the step of having walked.
The present invention adopts the recognition principle of the acceleration of gait waveform, moderating process, and the waveform producing during to human locomotion is identified, thereby reaches the effect of meter step.The acceleration information identification of the acceleration of gait waveform, moderating process is incorporated in step-recording method, is the aspect that the present invention creates.
For the identifying of acceleration information, be not limited to above disclosed mode, further, the concrete acceleration information recognition method disclosing for the present invention, also just illustrative explanation.
For example, in other embodiments, in the array forming for acceleration value, the quantity of the sampling acceleration value comprising in it, is also and indefinite to that is to say its array: a1, a2.。。。An can be that the sampling accekeration by any amount forms.
Further, for the set-up mode of acceleration threshold values, can be also that before and after being not limited to, accekeration subtracts each other, can equivalent transformation be also that value is subtracted each other at interval, for example, difference is interval difference, i.e. difference between first and the 3rd acceleration value.
Further, for the default value of acceleration amount and amount of deceleration, it can be also any number, the preset value 2 in specific embodiment, and just example, does not limit.It, can corresponding increase or minimizing with the increase of quantity of sampling quantity.
Further, in other embodiments, the quantity of the gait gathering in advance for user, can change as required, and indefinite.
Further, another embodiment of the present invention also provides a kind of step count set for the step-recording method implementing the present invention relates to.
As shown in Figure 1, a kind of step count set, it includes acceleration transducer, data processing unit and data output unit.Wherein acceleration transducer and data processing unit are used the step-recording method the present invention relates to obtain meter step data, and then data processing unit sends to data output device to offer user meter step data.
Wherein acceleration transducer comprises 2 axles and/or 3 axle acceleration sensors.And the data that collect are the Wave datas that collect on axle of acceleration transducer.For multiaxis acceleration transducer, its each axle can carry out respectively image data simultaneously, data relatively after, can be using the larger axle of the waveform peak-to-peak value scope obtaining as the axle that detects gait Wave data.
Further, the gait waveform that wherein acceleration transducer obtains, is a kind of by user runs, is careful, arm whipping produces waveform.That is to say, the step count set the present invention relates to, can place arbitrarily with user, for example, is placed on trousers pocket, pocket, waistband and position on hand etc., and unrestricted, equally can obtain good meter step effect.
Further, wherein data output device comprises display device and sound broadcasting device, so, when user is inconvenient to see meter step data, can hear that step count set broadcasts meter step data, is more convenient for user's use.
The foregoing is only better embodiment of the present invention; protection scope of the present invention is not limited with above-mentioned embodiment; in every case those of ordinary skills' equivalence that disclosure is done according to the present invention is modified or is changed, and all should include in the protection domain of recording in claims.
Claims (10)
1. the step-recording method based on acceleration transducer, is characterized in that, it includes following steps:
Obtain pre-set threshold value step: use acceleration transducer to gather in advance the gait of user's 3 steps or above quantity, the gait data collecting is carried out to analytical calculation, the acceleration difference getting in gait vibrational waveform crest value and acceleration accordingly and/or moderating process is average, choose maximal value and minimum value in crest value wherein, after being made as, detect the upper of gait peak value, lower threshold values, choose the minimum and maximum acceleration difference average data in accelerator and/or moderating process, and be made as the upper of acceleration difference in accelerator and/or moderating process, lower threshold values,
Data acquisition and comparison step: use acceleration transducer to gather user's gait Wave data, the Wave data of identifying its peak value with and accelerator and/or moderating process in acceleration difference data, if its peak-data and corresponding acceleration difference thereof fall within the scope of the pre-set threshold value of setting, think user's step of having gone ahead.
2. the step-recording method based on acceleration transducer as claimed in claim 1, is characterized in that, the upper and lower threshold values of the gait peak value of wherein setting is greater than the threshold values of initial setting.
3. the step-recording method based on acceleration transducer as claimed in claim 1, is characterized in that, the upper and lower threshold values of the gait peak value of wherein setting is, is added or deducted to obtain after a pre-value by the maximal value of the crest value collecting and minimum value.
4. the step-recording method based on acceleration transducer as claimed in claim 1, it is characterized in that, wherein choose in the acceleration difference of default accelerator, lower threshold values step, it is for saving as an array by the accekeration of front 3 or the above quantity of the crest value of each the step waveform collecting in advance, for the accekeration before crest value, it is the accekeration in accelerator, by rear data, deduct previous data successively, the difference obtaining is relatively obtained to maximal value and minimum value, successively each step of pre-collection is carried out to such calculating, and acceleration difference maximal value and the minimum value of all gaits are averaged respectively, being made as gait waveform accelerates in difference, lower threshold values,
Gathering numerical value comparison step, the wherein acceleration difference data of accelerator identification, for obtaining this waveform, accelerate accordingly difference data, front and back acceleration difference in accelerator is dropped on to the number of times accelerating within the scope of the upper and lower threshold values of difference and carry out accumulated counts, be called acceleration amount, when acceleration amount is more than or equal to predetermined value, think user's step of having gone ahead.
5. the step-recording method based on acceleration transducer as claimed in claim 1, it is characterized in that, wherein choose in the acceleration difference of default moderating process, lower threshold values step, it is for saving as an array by the accekeration of rear 3 or the above quantity of the crest value of each the step waveform collecting in advance, for the accekeration after crest value, it is the accekeration in moderating process, by previous data, deduct rear data successively, the difference obtaining is relatively obtained to maximal value and minimum value, successively each step of pre-collection is carried out to such calculating, and deceleration difference maximal value and the minimum value of all gaits are averaged respectively, be made as in gait waveform deceleration difference, lower threshold values,
Gathering numerical value comparison step, the wherein acceleration difference data of moderating process identification, for obtaining this waveform difference data that slows down accordingly, the number of times that in moderating process, front and back acceleration difference drops within the scope of the upper and lower threshold values of deceleration difference is carried out to accumulated counts, be called amount of deceleration, when amount of deceleration is more than or equal to predetermined value, think user's step of having gone ahead.
6. the step-recording method based on acceleration transducer as claimed in claim 1, is characterized in that, the gait waveform that wherein acceleration transducer obtains is a kind of by user runs, is careful, arm whipping produces waveform.
7. the step-recording method based on acceleration transducer as claimed in claim 1, is characterized in that, the gait waveform that wherein acceleration transducer obtains, is the Wave data obtaining on axle of acceleration transducer.
8. the use step count set of the step-recording method based on acceleration transducer as claimed in claim 1, it is characterized in that, it includes acceleration transducer, data processing unit and data output unit, wherein acceleration transducer and data processing unit are used the method for claim 1 to obtain meter step data, and then data processing unit sends to data output device to offer user meter step data.
9. step count set as claimed in claim 8, is characterized in that, wherein acceleration transducer comprises 2 axles and/or 3 axle acceleration sensors.
10. step count set as claimed in claim 8, is characterized in that, wherein data output device comprises display device and/or sound broadcasting device.
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