CN208492094U - Wearable lower limb signal acquiring system for lower limb rehabilitation assessment - Google Patents
Wearable lower limb signal acquiring system for lower limb rehabilitation assessment Download PDFInfo
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- CN208492094U CN208492094U CN201721400281.5U CN201721400281U CN208492094U CN 208492094 U CN208492094 U CN 208492094U CN 201721400281 U CN201721400281 U CN 201721400281U CN 208492094 U CN208492094 U CN 208492094U
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Abstract
The utility model belongs to technical field of medical equipment, particularly for the wearable lower limb signal acquiring system of lower limb rehabilitation assessment.The utility model includes the modules such as bandage, signal acquisition, signal processing, signal transmission, power supply；Signal acquisition module is removably connected in bandage module, remaining module is mounted in bandage module；Signal acquisition module includes acceleration of motion sensor, plantar pressure signal acquisition unit, flexible electrode and myoelectricity AFE(analog front end)；Signal processing module includes microprocessor, and signal transmitting module includes bluetooth module；Microprocessor is communicated by spi bus with acceleration of motion sensor, is obtained motor message, is communicated using AD sample mode in piece with plantar pressure signal acquisition unit and myoelectricity AFE(analog front end), and plantar pressure signal and electromyography signal are obtained, and issues sampling instruction；Above-mentioned motor message, plantar pressure signal and electromyography signal in a manner of protocol package, are sent to host computer by bluetooth module and carry out subsequent processing by microprocessor.
Description
Technical field
The utility model belongs to technical field of medical equipment, and in particular to the wearable lower limb signal of lower limb rehabilitation assessment
Acquisition system.
Background technique
As Aging Problem constantly aggravates all over the world, lower limb rehabilitation problem is got worse, and leads to lower limb disorder
The reason of have very much, including injury gained in sports, neurotrosis etc..According to statistics, China 60 years old 2015 and the above population reach
2.22 hundred million, account for the 16.15% of total population.The year two thousand twenty is expected, elderly population reach 2.48 hundred million, and aging level reaches 17.17%
, inevitable the elderly can be because the disease such as cerebral apoplexy leads to lower extremity motor function obstacle, as everybody is external
Factor results in the need for carrying out lower limb rehabilitation training.However national rehabilitation's teacher quantity only has 100,000, good rehabilitation resources also all collect
In in a wide equal line city of going up north.Most of this needs the patient of rehabilitation that cannot obtain rehabilitation.Since patient obtains not
To timely and effectively rehabilitation, therefore it is easy to leave the sequelae such as hemiplegia.Therefore, how portable, autonomous, inexpensive and again
It is necessary for efficiently carrying out rehabilitation assessment and guidance to lower limb disorder patient.
Currently, various informative electricity physiological signal and motor message is widely used in lower limb rehabilitation, by existing
For signal processing method come the case where judging Rehabilitation.Main signal to be used is myoelectricity letter figure (EMG), wherein surface flesh
Electrograph (sEMG) has obtained more being widely applied due to the features such as its is non-intrusive, measurement facilitates.SEMG is in medical science of recovery therapy field
Used in it is most earliest be gait analysis, indicate that the muscle participates in walking movement using the sEMG movable beginning and ending time
Concertedness；The movable amplitude of sEMG and time-histories indicate that muscle participates in the reasonability of walking movement, and main measurement point is in tibialis anterior, small
Leg triceps.
Rehabilitation for patient's lower limb is mainly based upon gait analysis and is judged.Typical gait analysis laboratory or
Recovery room usually possesses pressure pavement, is assisted there are also several cameras.In the process of walking, camera is real-time for rehabilitation
Acquire action state, in conjunction with floor load sensor or power platform, comprehensive descision lower extremity movement state and rehabilitation situation.
In broad terms, existing issue includes: 1, and supply and demand ratio is uneven, and existing Rehabilitation System and scheme are not able to satisfy completely
The market demand；2, hospital's existing device higher cost and portability is poor, the cost is relatively high for time, space and money；3, suffer from
Person lacks the individual instructions of initiative rehabilitation training；4, lack portable lower limb appraisal procedure and means.
Summary of the invention
The purpose of this utility model is to provide a kind of portable, low in cost, monitoring datas to be comprehensively used for lower limb rehabilitation
The wearable lower limb signal acquiring system of assessment.
Wearable lower limb signal acquiring system provided by the utility model is suffered from using modular design for rehabilitation
Person's lower extremity movement signal, electromyography signal and plantar pressure signal acquisition and transmission；Including bandage module, signal acquisition module, letter
Number processing module, signal transmitting module, power supply module；Wherein, bandage module is a cyclic annular bandage, for being fixed on shank
On；Signal acquisition module is detachably connected in bandage module, signal processing module, signal transmitting module, power supply
Module is integrated in bandage module, and bandage module uses wearable design philosophy, and when use does not influence the normal of rehabilitation
Life.
The signal acquisition module, signal processing module, signal transmitting module, the hardware that power supply module is system, structure
Block diagram is as shown in Figure 1, in which:
Signal acquisition module includes vola signal acquisition module and electromyographic signal collection module, wherein vola signal acquisition
Module is made of acceleration of motion sensor and plantar pressure signal acquisition unit, is made into insole shape, is placed in sole；Flesh
Electrical signal collection module is made of flexible electrode and myoelectricity AFE(analog front end)；Signal processing module includes microprocessor, and signal is sent
Module includes bluetooth module；Power supply module is made of lithium ion battery and Voltage stabilizing module；The workflow of system is as follows:
Microprocessor passes through SPI(Serial Peripheral Interface (SPI)) bus communicates with acceleration of motion sensor, motor message is obtained,
Using AD(analog to digital in piece) mode of sampling grinds plantar pressure signal acquisition unit and myoelectricity AFE(analog front end) communicates with oneself,
Plantar pressure signal and electromyography signal are obtained, sampling instruction is issued；Microprocessor by above-mentioned motor message, plantar pressure signal and
Electromyography signal is sent to host computer by bluetooth module and is carried out subsequent processing in a manner of protocol package；
Host computer analyzes patient's lower extremity movement situation according to the signal being collected into, and carries out rehabilitation assessment and guidance.
In the utility model:
The electromyographic signal collection module includes flexible electrode and myoelectricity AFE(analog front end), for acquiring and amplifying lower limb rehabilitation
Patient's electromyography signal, the flexible electrode are fixed on rehabilitation shank gastrocnemius or musculus soleus by bandage module；
The acceleration of motion sensor is made of Inertial Measurement Unit (IMU), for collecting patient's sole exercise data,
To assess patient's ankle moving degree and balanced capacity；
The plantar pressure signal acquisition unit is made of compliant conductive adhesive tape and flexible pressure drag sensing material, for acquiring
Patient's plantar pressure data；
The signal processing module obtains the analog signal of plantar pressure signal acquisition unit by the way of scan round,
With the electromyography signal from myoelectricity AFE(analog front end), on piece AD conversion is carried out, plantar pressure signal and electromyography signal are obtained, meanwhile,
It is communicated by spi bus with acceleration of motion sensor, obtains motor message；Microprocessor is by above-mentioned plantar pressure signal, flesh
Electric signal and motor message are packaged, and are transmitted to bluetooth module in the form of data packet；
The signal transmitting module includes bluetooth module, and data packet is wirelessly transmitted to upper by bluetooth module by agreement
Machine；
The power supply module provides power supply for system.
In the utility model, lower limb signal acquiring system can be made into detachable form, when not needing measurement myoelectricity data, Gu
It is scheduled on shoes end.Various pieces can disassemble and install according to demand in signal acquisition module.
In the utility model, plantar pressure signal acquisition unit using being specifically designed, structure as shown in fig. 7, comprises it is upper,
In, lower three layers and sample circuit；Wherein, upper layer is the conductive electrode item layer of longitudinal arrangement, and the AD of connection microprocessor turns
Mouth is changed, lower layer is transversely arranged conductive electrode item layer, is grounded by pull down resistor；The conductive electrode band of upper layer longitudinal arrangement
The crosspoint of the conductive electrode band transversely arranged with lower layer constitutes sampled point；Middle layer is pressure sensing material layer, pressure sensing
Material is adhered at sampled point with dotted (such as dot, side's point).
Wherein, the conductive electrode item of upper layer longitudinal arrangement is 4-7 root, and the transversely arranged conductive electrode item of lower layer is 8-15
Root.
Sample circuit is as shown in figure 8, reduce branch's number in order to acquire the pressure signal of each point, using rank scanning
Mode each sampled point is controlled and is sampled, each collected voltage value of sampled point are as follows:
In formula, VsampleFor the voltage value that sampled point obtains, R0For fixed value resistance resistance value, R in sample circuitsensorFor pressure
Sensing material resistance value, Vcc are supply voltage in sample circuit.
In the utility model, preferably cost is relatively low for pressure sensing material, the flexible Velostat material for preferably having 3M company
Material is used as pressure sensing material.Its physical characteristic be opaque black, about 100 μm of thickness.Its electrical properties are compression electricity
Resistive (Piezoresistive), i.e., resistance reduces with pressure increase.Using Velostat material, cooperate flexible plastic film
Conductive tape makes to obtain new-type plantar pressure array acquisition module.
Sensor can be expanded in the utility model, in order to additionally add sensor, including flexible electrode, motion-sensing
Device, myoelectric sensor, humidity sensor, skin electric transducer.
The characteristics of the utility model:
1, the utility model uses modular design philosophy, acceleration of motion sensor, flesh in signal acquisition module
Electrical signal collection module and plantar pressure signal acquisition unit can install or remove according to demand.
2, the utility model substitutes traditional adhesive electrode piece with flexible electrode, for acquiring myoelectricity data.
3, the utility model makes sensor using flexible sensor and flexible conductive adhesive cloth, adopts for plantar pressure signal
Collection.
4, the sensor of the utility model design expands module, and expanding module can connect with main module, provides more bodies
Body characteristics data, the expansion module may include flexible electrode, motion sensor, myoelectric sensor, humidity sensor, skin pricktest
Sensor.
5, the utility model proposes wearable lower limb signal acquiring system, can be used to the lower limb function for assessing rehabilitation
Energy situation, and rehabilitation guide is carried out to patient.
The utility model technical effect
The utility model sensor and chip and new-type pressure matrix sensor produce it is portable, accurately may be used
Wearable lower limb signal acquiring system can provide more accurate rehabilitation assessment for patient, assist doctor's quick diagnosis.
1, the utility model can carry out monitoring lasting for a long time.The power consumption of embedded hardware system mainly includes signal acquisition
Module dissipation, signal processing module power consumption, signal transmitting module power consumption.And what this system used is all low-power consumption, microprocessor
Using MSP430 high speed, low-power microprocessor, sensor body moves signal acquisition and uses adaptive variable sampling rate, according to setting threshold
Value adjusts sample rate, largely reduces hardware power consumption, and wireless transmission section uses 4.0 low power consumption protocol of bluetooth, so
Device is all integrally energy conservation, low-power consumption, can be carried out long-term monitoring.
2, the utility model makes pressure matrix sensor, novel sensor using flexible sensor and flexible conductive adhesive cloth
It is capable of providing the highdensity pressure distribution in vola.The precision of balancing evaluation, gait analysis can be improved in highdensity pressure distribution.
3, sensor expansion module makes monitoring system become customizable, not according to the collocation of the different demands of different user
Same sensor expands module, and the system cost greatly reduced improves the scalability of device.
Detailed description of the invention
Fig. 1 is system hardware module frame chart.
Fig. 2 is the schematic diagram of Tthe utility model system embodiment.
Fig. 3 is vola signal acquisition module embodiment schematic diagram.
Fig. 4 is double mode real-time scene display diagram.Wherein, the non-myoelectricity mode of (a) myoelectricity mode (b).
Fig. 5 is MPU9250 read-write register format.
Fig. 6 is the bis- lead typical circuits of AD8232.
Fig. 7 is plantar pressure acquisition unit structure chart.
Fig. 8 is the single sampled point circuit diagram of plantar pressure in Fig. 7.
Fig. 9 is microprocessor work process.
Figure 10 is MPU9250 coordinate system and natural system of coordinates.
Figure 11 is the doubly-linked rod model that human body ankle arthrosis simplifies.
Figure 12 is range of motion angle schematic diagram.
Figure 13 is plantar pressure signal test result.Wherein, (a) is just contacted, (b) midstance, (c) is just swung.
Figure 14 is electromyography signal test waveform.Wherein, (a) remains where one is, (b) normal gait.
Figure label: 1,2,3 be plastic card, and 4 be bandage module housing, and 5 be winding displacement, and 6 be bandage module housing, 7,8,
9 be plastic card, and 10 be signal processing module mainboard, and 11 be electromyographic electrode, and 12 be electrode interface, and 13 is expand module interface,
14 be electrode interface, and 15 be fixing buckle, and 16 be vola signaling interface, and 17 be plantar pressure signal acquisition unit, and 18 be insole top
Layer, 19 be Inertial Measurement Unit (inertial sensor), and 20 be mat bottom.
Specific embodiment
The utility model is further described below by specific embodiment.
Fig. 2 is bandage modular structure schematic diagram, and signal processing module is placed in bandage module housing 6 and signal sends mould
Block, signal processing module and signal transmitting module are integrated in board unit 10.Aluminum cell is placed in bandage module housing 4, is led to
Winding displacement 5 is crossed to connect with board unit 10.There are module interfaces 13 for 6 side of bandage module housing, can connect with pressure insole is expanded
It connects.There are an electromyographic electrode interface in shell 6 and 7 inside of shell respectively, for placing 11. shell 4 of electromyographic electrode, 6 two sides of shell
Equipped with bandage interface 3,7.Plastic card 1,9 on bandage can be inserted into respectively in bandage interface 3,7.Hasp 8,9 on bandage is
Common hasp.After the completion of all fixations, a cyclic annular bandage is formed, can be fixed on shank.When do not need measurement electromyography signal
When, electromyographic electrode 11 can remove, and electrode interface 12,14 can be combined with the fixing buckle 15 of shoes, become one with shoes
Body.Fig. 3 illustrates the structure chart of vola signal acquisition module (insole).Sensor (i.e. pressure acquisition unit) 16 and IMU inertia
Sensor unit 18 is placed among insole top layer 17 and bottom 19.Pressure acquisition unit 16 passes through with inertial sensor unit 18
Conducting wire 15 is connect with mainboard 10.Fig. 4-a illustrates the form for needing to detect in the case of myoelectricity.Fig. 4-b, which is illustrated, does not detect myoelectricity
In the case of form.
Each functions of modules and workflow will be introduced respectively below.
1.1 signal acquisition module
Signal acquisition module includes vola signal acquisition module (insole) and electromyographic signal collection module, wherein vola letter
Number acquisition module is made of acceleration of motion sensor and plantar pressure signal acquisition unit, and electromyographic signal collection module is by flexibility
Electrode and myoelectricity AFE(analog front end) composition.Wherein, acceleration of motion sensor uses acceleration of motion sensor MPU9250, myoelectricity
AFE(analog front end) uses AD8232, and plantar pressure signal acquisition unit is made of compliant conductive adhesive tape and flexible pressure drag sensing material.
(1) acceleration of motion sensor MPU9250
MPU9250 is nine axis motion tracers of Invense company exploitation, has merged 3 axle accelerations, 3 axis gyros
Instrument and 3 axis magnetometers, compatible two kinds of transport protocols of SPI, I2C, can export the total data of nine axis simultaneously.This project uses
The function of 3 axis accelerometer therein and 3 axis gyroscopes, angular acceleration and magnetic force accelerometer can be the function of system later
It can extension offer space.SPI protocol and microprocessor communication are used in this project, obtain lower extremity movement signal.
MPU9250 read-write register format is as shown in Figure 5.Data with bytewise high priority storage, address equally with
Bytewise storage, wherein highest order is that 1 expression is read, and highest order indicates write-in for 0.
(2) myoelectricity AFE(analog front end) AD8232
AD8232 is a integrated front end, is guarded suitable for carrying out signal condition to bioelectrical signals.Built in it
One meter specially amplifier, an operational amplifier, a right leg drive amplifier and an intermediate power supplies voltage reference electricity
Compression buffer.
In addition, lead-fail detector detection circuit built in AD8232 and an automatic taibiter, the circuit can be in leads
Restore signal after reconnect rapidly.AD8232 integrates meter specially amplifier, can amplify the electricity physiological signals such as myoelectricity, electrocardio,
Inhibit electrode half-cell prtential simultaneously, possesses lesser size and very low power consumption.It can amplify bioelectrical signals as mould
The output of analog quantity.Since bioelectrical signals are very small, it is easy by extraneous interference, AD8232 bioelectricity monitor can pass through
Amplifier helps to obtain by amplified apparent bioelectrical signals, and EMG signal passes through amplified output analog quantity allusion quotation
Offset is 1 ~ 2V order of magnitude, and convenient for the analog-to-digital conversion of rear class, double lead typical structures are as shown in Figure 6.
(3) plantar pressure signal acquisition unit
It is flexible preferably to have 3M company present invention employs cost is relatively low by selection in multiple sensors
Velostat material is as pressure sensing material.Physical characteristic be opaque black, about 100 μm of thickness
(Openmaterials. Electrotextiles [G/OL] (2014-9-22) [2016-5-20]
Http:// openmaterials.org/materials-101-electrotextiles/).Its electrical properties
For compression resistance formula (Piezoresistive), i.e., resistance reduces with pressure increase.Using Velostat material, cooperation is flexible
Plastic film conductive tape has made the new-type plantar pressure array acquisition module voluntarily researched and developed.
It is viscous using two-sided conducting adhesive cloth by Velostat material cutting at the small cube of 1cm*1cm in specific manufacturing process
It is attached on sampled point, the circuit diagram of every scan sampled point is as shown in Figure 8.Each collected voltage value of sampled point
Are as follows:
In formula, VsampleFor the voltage value that sampled point obtains, R0For fixed value resistance resistance value, R in sample circuitsensorFor pressure
Sensing material resistance value, Vcc are supply voltage in sample circuit.
Branch's number is reduced in order to acquire the pressure signal of each point, is clicked through using each sampling of the principle of rank scanning
Row control and sampling, upper layer are 5 conductive electrodes of longitudinal arrangement, connect the AD conversion mouth of microprocessor, and middle layer is pressure biography
Feel material, lower layer is 10 transversely arranged conductive electrodes, is grounded by pull down resistor, connects by analog switch HC4067
Vcc carries out signal control by the control terminal of the I/O port connection HC4067 of MSP430.During acquisition, controlled by MSP430
Multiway analog switch processed gates each column electrode in turn, they are drawn high to Vcc, within the time for gating certain column electrode signal,
Every a line conductor wire is gated in turn by upper layer analog switch connects Vcc.In this way, sequentially being gated between 1-10 horizontal line, often
When secondary gating, 1-5 AD conversion takes turns to operate, to complete entire sampling process.Its structure is as shown in Figure 7.
The plantar pressure signal acquisition unit and acceleration of motion sensor uniformly constitute vola signal acquisition insole,
As shown in Figure 3.
1.2 signal processing module
Signal processing module handles data by microprocessor MSP430F5529, assesses for lower limb rehabilitation.
1.3 signal transmitting module
(1) CC2564 bluetooth module
CC2564 is the dual mode bluetooth chip of TI exploitation, while supporting the transmission of bluetooth 3.0 and bluetooth 4.0, and equipment is simultaneous
Capacitive is good, is easy to establish connection with equipment such as computer, mobile phone, tablet computers.This project uses commercialization bluetooth development of substrates, on
There is CC2564 and provides the ARMCortex-M0 microprocessor of bluetooth protocol repertory software-driven for the chip.Microprocessor operation
SPP agreement (Serial Port Profile), the transmitting terminal that can be used as serial ports transparent transmission use [12].The serial ports of bluetooth module with
The serial ports of MSP430 is connected, and therefore, following analysis is directed to UART(universal asynchronous receiving-transmitting transmitter) serial ports.
(2) Data Transport Protocol
Data are sent from serial ports in the form of data packet, and the transmission rate of data packet is 50Hz.
Simultaneously in order to guarantee communication security, influence of the channel disturbance for data is avoided, in combination with the biography of asynchronous serial port
Defeated feature, design data packet are as shown in table 1:
Table 1 sends data packet format
In this project use fixed-length data packet, each data packet 116, HEAD_H=0x88, HEAD_L=0x71,
LENGTH=22, CHECK are even-odd check, the position exclusive or that numerical value is first 115.
Data paragraph format see the table below 2 and table 3.
2 data paragraph format of table, ACCEL_X, Y, Z are each axle acceleration value of motion sensor, and GYR_X, Y, Z is that movement passes
Sensor around each axis angular rate value
3 data paragraph format of table, PRES are the voltage value of the wheel sampled point
(3) message transmission rate
Serial port baud rate: 115200
Transmission rate: 50packge/s=6400byte/s.
The utility model test result
(A) sole pressure test
In plantar pressure signal test, we simulate a normal gait period three phases, respectively just contact,
Midstance and just swing, have recorded the distribution of plantar pressure data, and the method for CUBIC interpolation is used in MATLAB software
The drafting of pressure-plotting is carried out, as a result as shown in figure 13.Wherein, (a) is just contacted, (b) midstance, (c) is just swung.
The plantar pressure module of the invention has preferable effect to the plantar nervous arch acquisition in gait processes, can be anti-
Reflect the plantar pressure situation during normal gait.
(B) electromyography signal is tested
In electromyography signal test, we devise two groups of movements: remain where one is and normal gait, using the invention into
The test of row electromyography signal, it is as shown in figure 14 to obtain waveform, wherein (a) remains where one is, (b) normal gait.
The electromyography signal module of the invention has good measurement result to electromyography signal, can react the related ginseng such as muscular strength
Number.
(C) action signal is tested
In action signal test, we survey the action signal and related algorithm using the mode of recorded video
Examination.Action signal is acquired using the invention, subject carries out the normal walking of a distance, and the whole process of walking is regarded
Frequency is recorded, and after obtaining action signal, is tested using the algorithm step pitch, step number and range of motion, obtains result such as
The following table 4:
Table 4
In range of motion test, subject personnel's full range joint movement is 61.8 °, and system exports 67.2 ° of result, mistake
Rate 8.7%.
Claims (6)
1. a kind of wearable lower limb signal acquiring system for lower limb rehabilitation assessment, which is characterized in that set using modularization
Meter for rehabilitation lower extremity movement signal, electromyography signal and plantar pressure signal acquisition and is sent；Including bandage module, letter
Number acquisition module, signal processing module, signal transmitting module, power supply module；Wherein, bandage module is a cyclic annular bandage, is used
In being fixed on shank；Signal acquisition module is detachably connected in bandage module, signal processing module, signal hair
Module, power supply module is sent to be integrated in bandage module；
The signal acquisition module, signal processing module, signal transmitting module, power supply module are system hardware, in which:
Signal acquisition module includes vola signal acquisition module and electromyographic signal collection module, wherein vola signal acquisition module
It is made of acceleration of motion sensor and plantar pressure signal acquisition unit, is made into insole shape, be placed in sole；Myoelectricity letter
Number acquisition module is made of flexible electrode and myoelectricity AFE(analog front end)；Signal processing module includes microprocessor, signal transmitting module
Include bluetooth module；Power supply module is made of lithium ion battery and Voltage stabilizing module；The workflow of system is as follows:
Microprocessor is communicated by spi bus with acceleration of motion sensor, and motor message is obtained, the side sampled using AD in piece
Formula is communicated with plantar pressure signal acquisition unit and myoelectricity AFE(analog front end), obtains plantar pressure signal and electromyography signal, and sending is adopted
Sample instruction；Above-mentioned motor message, plantar pressure signal and electromyography signal in a manner of protocol package, are passed through bluetooth mould by microprocessor
Block is sent to host computer and carries out subsequent processing.
2. wearable lower limb signal acquiring system according to claim 1, which is characterized in that wherein:
The electromyographic signal collection module includes flexible electrode and myoelectricity AFE(analog front end), for acquiring and amplifying lower limb rehabilitation patient
Electromyography signal, the flexible electrode are fixed on rehabilitation shank gastrocnemius or musculus soleus by bandage module；
The acceleration of motion sensor is made of Inertial Measurement Unit, for collecting patient's sole exercise data, is suffered from assessing
Person's ankle moving degree and balanced capacity；
The plantar pressure signal acquisition unit is made of compliant conductive adhesive tape and flexible pressure drag sensing material, for acquiring patient
Plantar pressure data；
The signal processing module obtains the analog signal of plantar pressure signal acquisition unit by the way of scan round, and comes
From the electromyography signal of myoelectricity AFE(analog front end), on piece AD conversion is carried out, plantar pressure signal and electromyography signal are obtained, meanwhile, pass through
Spi bus is communicated with acceleration of motion sensor, obtains motor message；Microprocessor believes above-mentioned plantar pressure signal, myoelectricity
Number and motor message be packaged, be transmitted to bluetooth module in the form of data packet；
Data packet is wirelessly transmitted to host computer by agreement by the bluetooth module；
The power supply module provides power supply for system.
3. wearable lower limb signal acquiring system according to claim 2, which is characterized in that lower limb signal acquiring system
Detachably, when not needing measurement myoelectricity data, it is fixed on shoes end.
4. wearable lower limb signal acquiring system according to claim 2, which is characterized in that the plantar pressure signal
Acquisition unit includes upper, middle and lower-ranking and sample circuit；Wherein, upper layer is the conductive electrode item layer of longitudinal arrangement, is connected
The AD conversion mouth of microprocessor is connect, lower layer is transversely arranged conductive electrode item layer, is grounded by pull down resistor；It longitudinally arranges on upper layer
The conductive electrode band of column and the crosspoint of the transversely arranged conductive electrode band of lower layer constitute sampled point；Middle layer is pressure sensing
Material layer, pressure sensing material are adhered at sampled point with dotted.
5. wearable lower limb signal acquiring system according to claim 4, which is characterized in that the plantar pressure signal
In acquisition unit, the conductive electrode item of upper layer longitudinal arrangement is 4-7 root, and the transversely arranged conductive electrode item of lower layer is 8-15 root.
6. wearable lower limb signal acquiring system according to claim 5, which is characterized in that the plantar pressure signal
In acquisition unit, sample circuit is controlled and is sampled to each sampled point by the way of rank scanning.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110537921A (en) * | 2019-08-28 | 2019-12-06 | 华南理工大学 | Portable gait multi-sensing data acquisition system |
| CN116350200A (en) * | 2023-03-02 | 2023-06-30 | 中国科学院深圳先进技术研究院 | Electrophysiological signal and blood microcirculation signal synchronous detection device |
-
2017
- 2017-10-26 CN CN201721400281.5U patent/CN208492094U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110537921A (en) * | 2019-08-28 | 2019-12-06 | 华南理工大学 | Portable gait multi-sensing data acquisition system |
| CN116350200A (en) * | 2023-03-02 | 2023-06-30 | 中国科学院深圳先进技术研究院 | Electrophysiological signal and blood microcirculation signal synchronous detection device |
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