CN103162736A - Method and device of motion parameter measurement based on piezoelectric sensor - Google Patents
Method and device of motion parameter measurement based on piezoelectric sensor Download PDFInfo
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- CN103162736A CN103162736A CN 201110421881 CN201110421881A CN103162736A CN 103162736 A CN103162736 A CN 103162736A CN 201110421881 CN201110421881 CN 201110421881 CN 201110421881 A CN201110421881 A CN 201110421881A CN 103162736 A CN103162736 A CN 103162736A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C22/00—Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers, using pedometers
- G01C22/006—Pedometers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
- A61B5/1118—Determining activity level
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Abstract
The invention relates to a method and a device of motion parameter measurement based on a piezoelectric sensor. According to the principle of kinesiology, the piezoelectric sensor is arranged inside an upper, and one end of the piezoelectric sensor is located at the position of an instep, and the other end of the piezoelectric sensor is located at the position of toes, and human motion parameters are calculated through the size of peak value voltages which are obtained and produced by the piezoelectric sensor or/ and removed time parameters where the peak value voltages are produced by the piezoelectric sensor. Not only can a walking span of a single step of a human be obtained, meanwhile, but also a walking real-time speed of the human can be obtained, thus dissipative energy of human motion can be further obtained. Compared with the prior art, the method and the device of the motion parameter measurement based on the piezoelectric sensor are simple in method and accurate to measure, and due to the fact that the piezoelectric sensor is high in sensitivity, data can be obtained accurately in time, meanwhile, due to the fact that the piezoelectric sensor is long in service life, the measuring device further has the advantages of being long in service life.
Description
[technical field]
The invention belongs to sensor technical field, relate to a kind of method and apparatus of the movement parameter measurement based on piezoelectric sensor.
[background technology]
Piezoelectric sensor is the sensor that utilizes the piezoelectric effect that produces after some dielectric medium stress to make.When so-called piezoelectric effect refers to that some dielectric at the External Force Acting that is subject to a direction, deformation occurs (comprising bending and telescopic shape change), due to the polarization phenomena of internal charge, can produce on its surface the phenomenon of electric charge.Piezoelectric sensor is simple in structure, volume is little, quality is light, power consumption is little, the life-span is long, and particularly it has good dynamic perfromance, the impulsive force that therefore is fit to have very wide band period effects power and changes at a high speed.
Piezoelectric sensor is mainly used in the fields such as power measurement and acceleration analysis, because External Force Acting only could be preserved in leak free situation at the electric charge that produces on piezoelectric element, namely need measuring circuit to have infinitely-great input impedance, this is practically impossible, therefore piezoelectric sensor can not be used for static measurement, can only be applied to kinetic measurement, piezoelectric element is under the effect of alternating force, electric charge can constantly replenish, can supply with the certain electric current of measuring circuit, therefore be only applicable to kinetic measurement.The direct current respective differences of piezoelectric sensor output, but need to adopt input impedance circuit or charge amplifier to overcome this defective.Piezoelectric sensor is widely used in the technical fields such as engineering mechanics, biomedicine, electroacoustics.
At biomedical sector, piezoelectric sensor is mainly used in the vital signs monitor of human body skin surface or implant into body inside.A lot of electronic auscultation devices have all adopted piezoelectric membrane as sensor element, and highly sensitive because it is durable, bandwidth range is wide.In this was used, sensor element all was encapsulated in traditional metal auscultation head usually, because sensor need to form with health " acting force ".In case dynamic pressure signal converts electric signal to, just can selectively filter or amplify, as the sound signal playback, use more the complex calculations method to judge concrete situation or be transferred to remote base stations to be further analyzed storage etc.But aspect the measurement of human body sport parameter but without any application.
[summary of the invention]
Purpose of the present invention is exactly the problem that exists in order to solve prior art, has proposed a kind of method and apparatus of the movement parameter measurement based on piezoelectric sensor.
The invention provides a kind of method of the movement parameter measurement based on piezoelectric sensor, it is characterized in that, the method comprises:
Obtain the crest voltage size that piezoelectric sensor produces;
This crest voltage size conversion is become the maximum bend angle of piezoelectric sensor;
The maximum bend angle of the maximum bend angle of this piezoelectric sensor and instep and toe junction is corresponding;
Calculate the span of single step according to the maximum bend angle of instep and toe junction and the length of leg.
The method further comprises:
Obtain piezoelectric sensor and produce crest voltage institute interlude;
This crest voltage interlude is converted to the frequency of piezoelectric sensor bending;
The frequency of this piezoelectric sensor bending is corresponding with the frequency of instep and toe junction bending;
Calculate the instantaneous velocity of advancing according to the frequency of instep and toe junction bending and the span of single step.
The method further comprises:
Calculate according to the instantaneous velocity of advancing and body weight the energy that motion consumes.
Described piezoelectric sensor is arranged in upper of a shoe, and an end of piezoelectric sensor is positioned at the instep position, and the other end is positioned at the toe position.
The crest voltage size that described piezoelectric sensor produces sends to receiving end or/and piezoelectric sensor produces crest voltage institute interlude parameter by wireless signal.
The present invention also provides a kind of device of the movement parameter measurement based on piezoelectric sensor, it is characterized in that, this device comprises:
Piezoelectric sensor is used for producing voltage when bending;
Voltage measurement unit is used for obtaining the crest voltage size that piezoelectric sensor produces;
Calculation processing unit is for this crest voltage size conversion being become the maximum bend angle of piezoelectric sensor; The maximum bend angle of the maximum bend angle of this piezoelectric sensor and instep and toe junction is corresponding;
This calculation processing unit calculates the span of single step according to the angle of instep and toe junction bending and the length of leg.
Described voltage measurement unit also is used for obtaining piezoelectric sensor and produces crest voltage institute interlude;
Described calculation processing unit also is used for this crest voltage interlude is converted to the frequency of piezoelectric sensor bending; The frequency of this piezoelectric sensor bending is corresponding with the frequency of instep and toe junction bending;
This calculation processing unit calculates the instantaneous velocity of advancing according to the frequency of instep and toe junction bending and the span of single step.
This calculation processing unit also calculates according to the instantaneous velocity of advancing and body weight the energy that motion consumes.
Described piezoelectric sensor is arranged in upper of a shoe, and an end of piezoelectric sensor is positioned at the instep position, and the other end is positioned at the toe position.
This device also comprises wireless unit and the radio receiving unit of making a start, the crest voltage size that described voltage measurement unit produces piezoelectric sensor sends to radio receiving unit or/and piezoelectric sensor produces crest voltage institute interlude parameter by the wireless transmission unit, and the crest voltage size that this radio receiving unit produces piezoelectric sensor is or/and piezoelectric sensor produces crest voltage institute interlude parameter sends to calculation processing unit to calculate and process.
The technique effect that the present invention is useful is:
compared to prior art, the present invention is according to kniesiological principle, piezoelectric sensor is arranged in upper of a shoe, and an end of piezoelectric sensor is positioned at the instep position, the other end is positioned at the toe position, and obtain crest voltage size that piezoelectric sensor produces and calculate human body sport parameter or/and piezoelectric sensor produces crest voltage institute interlude parameter, not only can obtain the span that the human body single step is advanced, simultaneously can obtain the instantaneous velocity that human body is advanced, thereby further obtain the energy that human motion consumes, compared to prior art, has method simple, measure accurately, and because piezoelectric sensor is highly sensitive, so data acquisition is in time accurate, simultaneously due to the piezoelectric sensor long service life, so measurement mechanism of the present invention also has advantages of long service life.
the crest voltage size that voltage measurement unit produces piezoelectric sensor sends to radio receiving unit or/and piezoelectric sensor produces crest voltage institute interlude parameter by the wireless transmission unit, the crest voltage size that this radio receiving unit produces piezoelectric sensor is or/and piezoelectric sensor produces crest voltage institute interlude parameter sends to calculation processing unit to calculate and process, thereby the processing of data that will be the most complicated is given the calculation processing unit that is arranged on outside upper of a shoe and is completed, the partial volume that can make this device be arranged in upper of a shoe is very little, and the slightly large computer processing unit of volume is arranged on outside upper of a shoe, can be carried by other modes, make this measurement mechanism more practical, data-handling capacity speed is faster.
[description of drawings]
Fig. 1 is that the embodiment of the present invention 1 is based on the method flow diagram of the movement parameter measurement of piezoelectric sensor;
Fig. 2 is the set position view of piezoelectric sensor of the present invention;
Fig. 3 is the device block diagram that the present invention is based on the movement parameter measurement of piezoelectric sensor;
Fig. 4 is that the embodiment of the present invention 2 is based on the method flow diagram of the movement parameter measurement of piezoelectric sensor;
Fig. 5 is that the embodiment of the present invention 3 is based on the method flow diagram of the movement parameter measurement of piezoelectric sensor.
[embodiment]
For the purpose, technical scheme and the advantage that make invention is clearer, below in conjunction with accompanying drawing and optimum embodiment, the present invention is further elaborated.Should be appreciated that the embodiment of optimum described herein only in order to explain the present invention, is not used for limiting the present invention.
Principle of the present invention is as follows:
Because human body is moving, particularly when running, the instep of human body and the junction of toe have bending, the step that is stepped when the human body running is larger, the angle of its bending is larger, and the same person velocity is faster, in its regular hour, the step that is stepped is more, the frequency of the junction of instep and toe bending is higher, angle and the crooked frequency of obtaining the junction bending of the instep of human body and toe can be known the instantaneous velocity that a people runs or walks, thereby lay the first stone for obtaining of other kinematic parameters.
Embodiment 1
Be dependent on above-mentioned principle, as shown in Figure 1, the present invention proposes a kind of method of the movement parameter measurement based on piezoelectric sensor, the method comprises the steps:
S1: obtain the crest voltage size that piezoelectric sensor produces;
The electric weight that piezoelectric sensor produces is after the loop forms voltage, through detecting the crest voltage size that produces when the piezoelectric sensor flexibility is maximum after amplifying circuit.
S2: the maximum bend angle that this crest voltage size conversion is become piezoelectric sensor;
The voltage that each piezoelectric sensor produces is directly proportional to the angle of bend of piezoelectric sensor, and the crest voltage size that produces by piezoelectric sensor can calculate the maximum bend angle of piezoelectric sensor.and as shown in Figure 2, this piezoelectric sensor is arranged in the upper of a shoe (not shown), and an end of piezoelectric sensor 10 is positioned at instep 20 positions, the other end is positioned at toe 30 positions, so the maximum bend angle of piezoelectric sensor is that the maximum bend angle with the instep of human body and toe junction is corresponding, namely when the angle of bend of the instep of human body and toe junction is maximum, the piezoelectric sensor angle of bend is also maximum, although the reason of restriction footwear material, the angle of bend of the instep of human body and toe junction is not necessarily identical with the piezoelectric sensor angle of bend, but it still can carry out synchronous according to the data initialization correction.For example, before running, the voltage that during to human body instep and the crooked various angle in toe junction, piezoelectric sensor produces gathers, the voltage that piezoelectric sensor when namely running is in various state to human body produces gathers, thereby can judge the angle of bend of piezoelectric sensor and the corresponding relation between human body running span.
S3: calculate the span of single step according to the maximum bend angle of instep and toe junction and the length of leg.
The length that the maximum bend angle of instep and toe junction multiply by leg is the span of human body single step.This single step span is the single step span in the normative situation of running posture, and not necessarily everyone satisfies the criteria at running posture, so in fact everyone is when making instep and the crooked different angles in toe junction, its single step span is all different because of its posture, whether identical with the theoretical single step span of calculating by actual measurement single step span, can judge whether the posture that the people runs conforms to the standard.
Method according to above-mentioned movement parameter measurement based on piezoelectric sensor, the present embodiment also provides a kind of device of the movement parameter measurement based on piezoelectric sensor, as shown in Figure 3, this device comprises: be arranged at the piezoelectric sensor in upper of a shoe, this piezoelectric sensor is used for producing voltage when bending; Voltage measurement unit, described voltage measurement unit are used for obtaining the crest voltage size that piezoelectric sensor produces; Described piezoelectric sensor produces voltage and carries out the signal amplification through discharge circuit, and the voltage signal of amplification is caught by voltage measurement unit, and the crest voltage size that described voltage measurement unit produces piezoelectric sensor sends to by bluetooth transmitters and is arranged at far-end; Described bluetooth transmitters, amplifying circuit, voltage measurement unit and piezoelectric sensor all are arranged in upper of a shoe, and described bluetooth transmitters, voltage measurement unit connect the first supply module.
This device also comprises the Bluetooth Receiver that is arranged at far-end, described Bluetooth Receiver obtains described crest voltage size, and these crest voltage data are sent to calculation processing unit, described calculation processing unit is used for this crest voltage size conversion is become the maximum bend angle of piezoelectric sensor; The maximum bend angle of the maximum bend angle of this piezoelectric sensor and instep and toe junction is corresponding; Described calculation processing unit calculates the span of single step according to the angle of instep and toe junction bending again and the length of leg.
Bluetooth Receiver, calculation processing unit connect the second supply module, and this Bluetooth Receiver, calculation processing unit and the second supply module are arranged at far-end, can be packaged together and be fixed in a certain position of health.
Embodiment 2
On the basis of above-described embodiment 1, as shown in Figure 4, the invention provides another based on the method for the movement parameter measurement of piezoelectric sensor, the method comprises the steps:
T1: obtain the crest voltage size that piezoelectric sensor produces;
T2: obtain piezoelectric sensor and produce crest voltage institute interlude;
Because piezoelectric sensor only just can produce maximum voltage when bending is maximum, and piezoelectric sensor is arranged on human body instep and toe junction, just can produce maximum voltage when piezoelectric sensor is only taken a step maximum when human body is run or walked, so according to the crest voltage institute interlude that obtains that piezoelectric sensor produces, can judge human body and complete a running needed time of action, thereby can know the frequency of making across the leg action.
T3: the maximum bend angle that this crest voltage size conversion is become piezoelectric sensor;
T4: the frequency that this crest voltage interlude is converted to the piezoelectric sensor bending;
T5: calculate the span of single step according to the maximum bend angle of instep and toe junction and the length of leg;
T6: calculate the instantaneous velocity of advancing according to the frequency of instep and toe junction bending and the span of single step.
The span that the frequency of instep and toe junction bending multiply by single step multiply by 2 again and equals the instantaneous velocity of advancing when human body is run or walked, in like manner this instantaneous velocity is also theoretical velocity, if and can calculate the average velocity that human body is advanced in reality, can judge him in acceleration and the deceleration situation of stages, thereby science is moved and the mode of motion of standard human body provides Data support in order to work out.
According to the method for above-mentioned movement parameter measurement based on piezoelectric sensor, the present embodiment also provides a kind of device of the movement parameter measurement based on piezoelectric sensor, as shown in Figure 3, from be embodiment 1 different be:
Described voltage measurement unit also is used for obtaining piezoelectric sensor and produces crest voltage institute interlude;
Described calculation processing unit also is used for this crest voltage interlude is converted to the frequency of piezoelectric sensor bending; The frequency of this piezoelectric sensor bending is corresponding with the frequency of instep and toe junction bending;
This calculation processing unit calculates the instantaneous velocity of advancing according to the frequency of instep and toe junction bending and the span of single step.
The piezoelectric sensor that described bluetooth transmitters is obtained voltage measurement unit produces crest voltage institute interlude and also sends to far-end, gives calculation processing unit after described piezoelectric sensor produces crest voltage institute interlude is received by Bluetooth Receiver and processes.
Embodiment 3
On the basis of above-described embodiment 2, as shown in Figure 5, also comprise the steps: based on the method for the movement parameter measurement of piezoelectric sensor
T7: calculate the energy that motion consumes according to the instantaneous velocity of advancing and body weight.
Described calculation processing unit also is used for calculating according to the instantaneous velocity of advancing and body weight the energy that motion consumes.The energy that consumes by calculating human motion, thus Data support provided for fat-reducing and the body-building of human body.
In the present embodiment, wireless transmission unit and unlimited receiving element are selected bluetooth, can certainly select other wireless communication module.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (10)
1. the method based on the movement parameter measurement of piezoelectric sensor, is characterized in that, the method comprises:
Obtain the crest voltage size that piezoelectric sensor produces;
This crest voltage size conversion is become the maximum bend angle of piezoelectric sensor;
The maximum bend angle of the maximum bend angle of this piezoelectric sensor and instep and toe junction is corresponding;
Calculate the span of single step according to the maximum bend angle of instep and toe junction and the length of leg.
2. the method for the movement parameter measurement based on piezoelectric sensor according to claim 1, is characterized in that, the method further comprises:
Obtain piezoelectric sensor and produce crest voltage institute interlude;
This crest voltage interlude is converted to the frequency of piezoelectric sensor bending;
The frequency of this piezoelectric sensor bending is corresponding with the frequency of instep and toe junction bending;
Calculate the instantaneous velocity of advancing according to the frequency of instep and toe junction bending and the span of single step.
3. the method for the movement parameter measurement based on piezoelectric sensor according to claim 2, is characterized in that, the method further comprises:
Calculate according to the instantaneous velocity of advancing and body weight the energy that motion consumes.
4. the method for according to claim 1-3 arbitrary described movement parameter measurements based on piezoelectric sensor, is characterized in that, described piezoelectric sensor is arranged in upper of a shoe, and an end of piezoelectric sensor is positioned at the instep position, and the other end is positioned at the toe position.
5. the method for the movement parameter measurement based on piezoelectric sensor according to claim 4, it is characterized in that, the crest voltage size that described piezoelectric sensor produces sends to receiving end or/and piezoelectric sensor produces crest voltage institute interlude parameter by wireless signal.
6. the device based on the movement parameter measurement of piezoelectric sensor, is characterized in that, this device comprises:
Piezoelectric sensor is used for producing voltage when bending;
Voltage measurement unit is used for obtaining the crest voltage size that piezoelectric sensor produces;
Calculation processing unit is for this crest voltage size conversion being become the maximum bend angle of piezoelectric sensor; The maximum bend angle of the maximum bend angle of this piezoelectric sensor and instep and toe junction is corresponding;
This calculation processing unit calculates the span of single step according to the angle of instep and toe junction bending and the length of leg.
7. the device of the movement parameter measurement based on piezoelectric sensor according to claim 6 is characterized in that:
Described voltage measurement unit also is used for obtaining piezoelectric sensor and produces crest voltage institute interlude;
Described calculation processing unit also is used for this crest voltage interlude is converted to the frequency of piezoelectric sensor bending; The frequency of this piezoelectric sensor bending is corresponding with the frequency of instep and toe junction bending;
This calculation processing unit calculates the instantaneous velocity of advancing according to the frequency of instep and toe junction bending and the span of single step.
8. the device of the movement parameter measurement based on piezoelectric sensor according to claim 7, is characterized in that, this calculation processing unit also calculates according to the instantaneous velocity of advancing and body weight the energy that motion consumes.
9. the device of according to claim 6-8 arbitrary described movement parameter measurements based on piezoelectric sensor, is characterized in that, described piezoelectric sensor is arranged in upper of a shoe, and an end of piezoelectric sensor is positioned at the instep position, and the other end is positioned at the toe position.
10. the device of the movement parameter measurement based on piezoelectric sensor according to claim 9, it is characterized in that, this device also comprises wireless unit and the radio receiving unit of making a start, the crest voltage size that described voltage measurement unit produces piezoelectric sensor sends to radio receiving unit or/and piezoelectric sensor produces crest voltage institute interlude parameter by the wireless transmission unit, the crest voltage size that this radio receiving unit produces piezoelectric sensor is or/and piezoelectric sensor produces crest voltage institute interlude parameter sends to calculation processing unit to calculate and process.
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| CN 201110421881 CN103162736A (en) | 2011-12-15 | 2011-12-15 | Method and device of motion parameter measurement based on piezoelectric sensor |
| PCT/CN2012/070271 WO2013086789A1 (en) | 2011-12-15 | 2012-01-12 | Method and device for measuring motion parameters based on piezoelectric sensor |
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| CN 201110421881 CN103162736A (en) | 2011-12-15 | 2011-12-15 | Method and device of motion parameter measurement based on piezoelectric sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341729A (en) * | 2018-10-19 | 2019-02-15 | 浙江理工大学 | A kind of device and method measuring women zoarium brassiere |
| WO2019191980A1 (en) * | 2018-04-04 | 2019-10-10 | 深圳市沃特沃德股份有限公司 | Exercise data processing method, device, and computer device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS60200120A (en) * | 1984-03-24 | 1985-10-09 | Matsushita Electric Works Ltd | Pedometer |
| US5797201A (en) * | 1997-07-24 | 1998-08-25 | Huang; Tien-Tsai | Shoe with step counting capability |
| US6836744B1 (en) * | 2000-08-18 | 2004-12-28 | Fareid A. Asphahani | Portable system for analyzing human gait |
| CN101347333A (en) * | 2007-07-17 | 2009-01-21 | 中国科学院理化技术研究所 | Mini measurement mechanism for recording gait information of human body |
| JP4877395B2 (en) * | 2010-01-19 | 2012-02-15 | セイコーエプソン株式会社 | Stride estimation method and stride estimation apparatus |
| CN201929959U (en) * | 2011-01-24 | 2011-08-17 | 中国人民解放军第三军医大学第一附属医院 | Gait analysis meter |
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2011
- 2011-12-15 CN CN 201110421881 patent/CN103162736A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019191980A1 (en) * | 2018-04-04 | 2019-10-10 | 深圳市沃特沃德股份有限公司 | Exercise data processing method, device, and computer device |
| CN109341729A (en) * | 2018-10-19 | 2019-02-15 | 浙江理工大学 | A kind of device and method measuring women zoarium brassiere |
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Application publication date: 20130619 |