CN104510463B - ECG detection device based on wearable device - Google Patents
ECG detection device based on wearable device Download PDFInfo
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- CN104510463B CN104510463B CN201410746483.XA CN201410746483A CN104510463B CN 104510463 B CN104510463 B CN 104510463B CN 201410746483 A CN201410746483 A CN 201410746483A CN 104510463 B CN104510463 B CN 104510463B
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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
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
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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
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/6803—Head-worn items, e.g. helmets, masks, headphones or goggles
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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Abstract
The invention discloses a kind of ECG detection device based on wearable device, including ECG Acquisition Device, integrated simulation front end, mixed signal microcontroller, bluetooth module, display device, power management module, solaode, input equipment and display lamp, ECG Acquisition Device includes the first EGC sensor and the second EGC sensor, first EGC sensor is arranged at the back side of wearable device, and the second EGC sensor is arranged at wearable device front or frame；ECG Acquisition Device is connected with integrated simulation front end, and integrated simulation front end is connected with mixed signal microcontroller, and bluetooth module is connected with mixed signal microcontroller, external network respectively；Power management module is connected with solaode, and the two is for powering for associated components in detection device.Volume of the present invention is little, and result is accurate, and power consumption is extremely low, available solar recharging, it is simple to the electrocardio carrying out outdoor activity or cardiovascular disease is monitored whenever and wherever possible.
Description
Technical field
The present invention relates to vital sign parameter detection device research field, specifically refer to a kind of based on wearable dress
The ECG detection device put.
Background technology
At present, cardiovascular disease has become the principal disease of harm human health, according to statistics, the most every year
Having millions of people to die from cardiovascular disease, therefore prevention and the diagnosis of cardiovascular disease seems increasingly important.Mesh
Front electrocardiogram is to measure and the best method of diagnosis abnormal heart rhythms, is conducted by the diagnosable electrocardio of electrocardiogram
The allorhythmia of heart and the change of cardiac rhythm that causes due to electrolyte balance imbalance during tissue damaged.
But, in traditional electrocardioscanner, mainly connected by the communications cable between each hardware unit, its operation
Platform is also based on non-wireless means, and this kind of conventional apparatus is because of wired connection so that it is usable range is restricted significantly,
Be inconvenient to move, also can bring mental pressure to detected person, so that testing result distortion.
Along with the raising of people's living standard, the health perception of people strengthens day by day, it would be desirable to examine whenever and wherever possible
Surveying physiological parameter, in recent years, the wearable medical product quickly grown meets the preferable product of this demand just
Product.ECG detecting function is transplanted on wearable medical product, on the one hand can monitor cardiovascular disease in real time
Disease, is user-friendly for oneself's health Evaluation, obtains morbidity information in time, thus obtains early and rescue
Control, increase chance for survival, meanwhile, long term monitoring electrocardio, the change of heart rate, it is possible to obtain from variation tendency
Obtain useful information, thus be of value to prevention and the diagnosis and treatment instructing disease.On the other hand, it is possible to transport for the limit
Dynamic, high-intensity exercise provides reference in real time, is conducive to adjusting motion in real time according to EGC pattern and HR values
Intensity, formulates, revises exercise program, the allorhythmia of heart detected early, occur health hazard,
Stop motion before life danger.
Although having occurred in that a series of wearable electrocardiograph monitoring device, but major part all having been adopted
Take the characteristic portion that adhesive electrode is pasted onto human body, by wire, electrode be connected with controller, display,
Not only in-convenience in use, and be unfavorable for long periods of wear, adhesive electrode and wire all can extreme influence motion shapes
The use of device during state, these limitations all can limit cardiac electrical real-time monitoring and stability largely, from
And have influence on accuracy and the real-time of monitoring result.Additionally, existing ECG detection device power supply almost all
Using battery to power or the mode of power source charges, this power supply mode makes the detection device up time by very
The restriction of big degree, it is impossible to meet the demand of monitoring in real time.
Summary of the invention
It is an object of the invention to the shortcoming overcoming prior art with not enough, it is provided that a kind of based on wearable device
ECG detection device, this device is disposed in existing Wearable device, such as intelligent watch, intelligence
Energy bracelets etc., have compact, easy to use, the advantage of use time length.
The purpose of the present invention is realized by following technical scheme: ECG detection device based on wearable device,
Including ECG Acquisition Device, integrated simulation front end, mixed signal microcontroller, bluetooth module, display device,
Power management module, solaode, input equipment and display lamp, described ECG Acquisition Device includes first heart
Electric transducer and the second EGC sensor, the first EGC sensor is arranged at the back side of wearable device shell,
With contact skin, the second EGC sensor is arranged at wearable device outer casing frontispiece or frame；ECG Acquisition Device
Being connected with integrated simulation front end, SPI (Serial Peripheral Interface, serial are passed through in integrated simulation front end
Peripheral Interface) it is connected with mixed signal microcontroller, bluetooth module passes through UART (Universal
Asynchronous Receiver/Transmitter, universal asynchronous receiving-transmitting transmitter) and mixed signal microcontroller
Device is connected, and bluetooth module is connected with external network；Power management module is connected with solaode, and the two is used
In for ECG detection device integrated simulation front end, mixed signal microcontroller, bluetooth module, display device,
Display lamp is powered；Display device, input equipment, display lamp are connected with mixed signal microcontroller respectively, and
Being worked by mixed signal microprocessor controls, described input equipment is for starting the ECG detecting of wearable device
Function, display lamp is for showing the ECG detecting functional status that wearable device is presently in.
Preferably, described power management module includes solar charging circuit, solar energy discharge circuit, the sun
Energy charge controller, solar energy discharge controller, solar energy interface, accumulator interface, loading interfaces and storage
Battery, wherein solaode is connected with solar energy interface, and accumulator interface is connected with accumulator, accumulator
It is additionally provided with interface for being connected with external charging power supply；Loading interfaces is connected with described mixed signal microcontroller；
Solar charging controller controls solar charging circuit work, and solaode passes through solar charging circuit
Charge to accumulator；Solar energy discharge controller controls the work of solar energy discharge circuit, and accumulator passes through the sun
Can discharge circuit mixed signal microcontroller, bluetooth module, display device, instruction in ECG detection device
Lamp is powered.
Preferably, the solar charging being made up of described solar charging circuit and described solar charging controller
Electricity module and the solar energy electric discharge mould being made up of described solar energy discharge circuit and described solar energy discharge controller
Block is independent of one another, and charging and discharging process is independently carried out.Such that it is able to power consumption is greatly lowered, prolong further
Long standby, the use time.
Further, described solaode uses polysilicon membrane type solaode.This battery be by
Polysilicon membrane type photoelectric material high-effect, high-photoelectric transformation efficiency obtains, therefore have volume little,
The advantage of power-on time length.
Preferably, described bluetooth module includes that main control module, RF core module, common peripheral devices connect
Mouth die block, sensor interface module and antenna, described main control module is used for receiving, it is micro-to store mixed signal
The signal that controller transmits, and when signal demand outwards transmits, by incoming for signal RF core module, main
Control module include wire be connected master controller, JTAG (Joint Test Action Group, joint test work
Make group) interface, ROM (Read-Only Memory, read only memory), flash memory, SRAM；Described penetrate
Frequently nucleus module is for when signal demand outwards transmits, and receives the signal that main control module is incoming, and will letter
Number outwards being transmitted by antenna, RF core module includes association's controller that wire is connected, digital phase-locked loop, DSP
Modem, SRAM, ROM and amplifier, amplifier is connected with antenna；Described antenna is used for will
Signal is sent to outside mobile terminal, and receives mobile terminal feedback result, and is sent to show by feedback result
Showing device shows；The I that universal peripheral interface module is connected by wire2C, UART and SPI form；Pass
Sensor interface module include wire be connected sensor controller, ADC (Analog to Digital Converter,
Analog-digital converter) and comparator；Main control module is respectively by wire and RF core module, general
Peripheral interface module is connected with sensor interface module.
Further, described main control module signal is passed to RF core module laggard enter sleep state.
Such that it is able to be substantially reduced the power consumption of bluetooth module.
Further, described sensor controller is used for the duty of the external ECG Acquisition Device of perception, if
External ECG Acquisition Device does not carry out signals collecting, then control bluetooth module automatically into sleep state.Thus
The power consumption of bluetooth module can be substantially reduced.
Further, described bluetooth module uses bluetooth standard V4.0, in order to penetrate wireless to wifi, UWB
Frequently technology includes Bluetooth technology in.Thus high-speed transfer and super low-power consumption are organically combined, it is possible to achieve this
Bright and other are mutual from the information between global manufacturer's distinct device, carry out information sharing.
Concrete, the ADS1293 chip of TI company is selected in described integrated simulation front end, for collecting
Electrocardiosignal be filtered, automatic gain, AD conversion.
Concrete, the MSP430FR5739 microcontroller of TI company selected by described mixed signal microcontroller,
The algorithm that the electrocardiosignal here collected uses low pass smooth realizes low-pass filtering, uses based on singular value
The filter method of decomposition method removes myoelectricity interference and motion artifacts, uses adaptivelinear neural network suppression to gather
During and Hz noise after gathering, use the cubic spline function differential technique pair in polynomial interopolation method
Baseline drift is corrected, and finally uses Wavelet Transform to carry out signal noise silencing, data compression and unusual spot check
Survey, and utilize the bank of filters characteristic that wavelet transformation has under multiple dimensioned, it is achieved corresponding QRS wave and its
The differentiation of his waveform.
The present invention compared with prior art, has the advantage that and beneficial effect:
(1) ECG detection device of the present invention is based on wearable device, overcomes in tradition ECG detection device
The use limitation that wired connection is brought, and electrocardio inspection anywhere or anytime can be realized by wearable device
Survey.Compact, wearable, result is accurate, and power consumption is extremely low, available solar recharging, it is simple to carry out
The electrocardio of outdoor activity or cardiovascular disease is monitored whenever and wherever possible, farthest reduces cardiac rhythm abnormal
Infringement and life danger to body.
(2) ECG Acquisition Device of the present invention includes 2 EGC sensor, and an EGC sensor is placed in wearable
The backboard of device, with contact skin, another EGC sensor is placed in wearable device outer casing frontispiece or frame,
During use, wearable device of the present invention is worn at wrist so that it is backboard and contact skin, another
The finger of hands rides on wearable device outer casing frontispiece or frame, constitutes the loop of ECG detecting, obtains the heart
The signal of telecommunication.Compared with prior art, breach the constraint of wire and electrode, easy to use, compact,
It is easy to monitor in real time and centre of motion electricity and the monitoring of heart rate.
(3) bluetooth module of the present invention, is on the one hand furnished with autonomous super low-power consumption sensor controller, permissible
The duty of the autonomous external ECG Acquisition Device of perception, if external ECG Acquisition Device does not carry out signals collecting,
Then bluetooth module is automatically into sleep state.If external ECG Acquisition Device carries out signals collecting, then bluetooth module
Automatically into duty；On the other hand use finer partition management, by data receiver, store and number
According to outwards transmitting separation, in order to manage independently and run, mixed signal microcontroller the signal transmitted is first
Being received in main control module, store, main control module is worked by main controller controls, now radio frequency
Nucleus module wouldn't work, and when signal demand outwards transmits, is conveyed into by signal under master controller effect
RF core module, main control module enters sleep state immediately, under association's controller controls, through numeral
Phaselocked loop, DSP modem and amplifier process, antenna this signal is outwards transmitted transmission.Compare
In prior art, two above aspect can reduce the power consumption of bluetooth module largely, thus extend and treat
Machine and the time of use.
(4) bluetooth module that the present invention uses, compared to prior art, can largely reduce power consumption,
Extend the standby and time of use, support bluetooth, wifi, UWB wireless radio-frequency simultaneously, can be realized this
Bright and other are mutual from the information between global manufacturer's distinct device, it is possible not only to send testing result
To intelligent terminal, it is calculated health parameters further, can be more remote medical monitor and tele-medicine is examined
Disconnected offer provides powerful support for, and compared with prior art, has the widely scope of application, it is possible to obtain more rich
Monitoring information, thus bring preferably to user, more accurately, more practical wearable medical treatment experiences.
(5) power management module of the present invention takes solar recharging and two kinds of power supply moulds of charge power supply charging
Formula.The solar charging power mode of power management module therein, uses high-effect, high-photoelectric transformation efficiency
Polysilicon membrane type solaode, on the one hand the solaode that this novel optoelectronic materials prepares can subtract
Baby battery volume, thus bring better wearable experience, on the other hand its high optoelectronic conversion ratio ensure that
The permanent supply performance of the present invention, compared with prior art, after the electricity obtained by charge power supply is exhausted,
The electricity that the high-effect conversion of recycling solaode comes proceeds cardiac electrical detection, breaches existing skill
The limitation that in art, ECG detecting is limited by battery electric quantity.Meanwhile, the solar charging power mode of power management module
Taking charging module and discharge module structure independent of each other and working method, charging and discharging process need not be same
Shi Jinhang, compared to prior art, can be greatly lowered power consumption, extends standby, the use time further.
The use of polysilicon membrane type solaode can also be greatly lowered cost, and the market increasing the present invention is competing
Strive power.
(6) present invention uses integrated simulation front end so that signal processing is in hgher efficiency, and stability is remarkably reinforced.
Overcome to detect in the past and device is tested device complexity, need to use a large amount of electronic component, be not easy to realize just
The shortcoming of taking, additionally, with analog voltage signal after in prior art, ECG Acquisition Device collects electrocardiosignal
The downward Primary Transmit of mode, until A/D conversion at just realize digitized, during this, signal is easily subject to
Introducing noise to extraneous interference, the present invention, by using integrated simulation front end, overcomes this defect,
Greatly improve the accuracy of measurement result.
Accompanying drawing explanation
Fig. 1 is the hardware block diagram of the present embodiment.
Fig. 2 (a) is the front schematic view of the present embodiment intelligent watch.
Fig. 2 (b) is the backboard schematic diagram of the present embodiment intelligent watch.
Fig. 3 is the composition structure chart of the bluetooth module of the present embodiment.
Fig. 4 is the power management module composition diagram of the present embodiment.
Fig. 5 (a) is the circuit diagram of solar charging controller in the present embodiment power management module.
Fig. 5 (b) is the reverse connection of accumulator protection of solar charging controller in the present embodiment power management module
Circuit diagram.
Fig. 6 is the circuit diagram of solar energy discharge controller in the present embodiment power management module.
Fig. 7 is the circuit diagram of solar charging circuit in the present embodiment power management module.
Fig. 8 is the circuit diagram of solar energy discharge circuit in the present embodiment power management module.
Fig. 9 is the workflow diagram of the present embodiment mixed signal microcontroller.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but the embodiment party of the present invention
Formula is not limited to this.
Embodiment 1
As it is shown in figure 1, the hardware composition of the present embodiment includes ECG Acquisition Device, integrated simulation front end, mixing
Signal microcontroller, bluetooth module, display device (i.e. liquid crystal display), power management module, solar energy
Battery, input equipment (i.e. button) and display lamp.ECG Acquisition Device is connected with integrated simulation front end, integrated
AFE (analog front end) is connected with mixed signal microcontroller by SPI, and mixed signal microcontroller passes through bluetooth module
Being connected with external network, bluetooth module is connected with mixed signal microcontroller by UART, power management mould
Block is connected with solaode, for mixed signal microcontroller, bluetooth module, liquid crystal in ECG detection device
Display, display lamp are powered, and liquid crystal display, button are connected with mixed signal microcontroller with display lamp,
And worked by mixed signal microprocessor controls, described button is for starting the ECG detecting merit of wearable device
Can, display lamp is used for showing that wearable device is in ECG detecting functional status.Solid black lines arrow in Fig. 1
Representing current trend, hollow arrow represents the electrocardiosignal trend collected, and dotted arrow represents control instruction
Trend.
Concrete, integrated simulation front end described in the present embodiment selects TI company ADS1293 chip, at this
In the electrocardiosignal that collects be filtered, automatic gain, AD conversion.
Concrete, mixed signal microcontroller described in the present embodiment selects the MSP430FR5739 of TI company micro-
Controller, this microcontroller is super low-power consumption type, here uses low pass to smooth the electrocardiosignal collected
Algorithm realize low-pass filtering, use filter method based on singular value decomposition method remove myoelectricity interference and motion
Interference, the Hz noise after using in adaptivelinear neural network suppression gatherer process and gathering, use multinomial
Baseline drift is corrected by the cubic spline function differential technique in formula interpolation method, finally uses wavelet transformation
Method carries out signal noise silencing, data compression and inflection point detection, and utilizes Wavelet Transform filter under multiple dimensioned
Ripple device group characteristic realizes the differentiation of corresponding QRS wave and other waveforms, thus obtains electrocardiographic wave accurately
And HR values.
As a example by intelligent watch shown in Fig. 2 (a), (b), the present embodiment ECG Acquisition Device includes that 2 electrocardios pass
Sensor, the first EGC sensor 2 is placed in the backboard of intelligent watch, with contact skin, the second EGC sensor 1
It is placed in the frame around intelligent watch liquid crystal display, during use, intelligent watch is worn at wrist so that it is
Backboard and contact skin, the finger of another hands rides on the frame around intelligent watch liquid crystal display, structure
Become the loop of ECG detecting, obtain electrocardiosignal.
As it is shown on figure 3, the bluetooth module of the present embodiment, including main control module, RF core module, lead to
With peripheral interface module and sensor interface module.The main control that wherein main control module is connected by wire
Device, JTAG, ROM, flash memory, SRAM form；Association's controller that RF core module is connected by wire,
Digital phase-locked loop, DSP modem, SRAM, ROM and amplifier composition, amplifier and antenna phase
Connect；The I that universal peripheral interface module is connected by wire2C, UART and low-power consumption SPI composition；Sensing
Super low-power consumption sensor controller, ADC and low power consumption comparator that device interface module is connected by wire form；
Main control module is connect with RF core module, universal peripheral interface module and sensor by wire respectively
Mouth die block is connected.
Concrete, described bluetooth module reaches power consumption ultra low levels in the following way:
(1) described bluetooth module is furnished with autonomous super low-power consumption sensor controller, can independently perception external
The duty of ECG Acquisition Device, if external ECG Acquisition Device does not carry out signals collecting, then bluetooth module is certainly
Dynamic entrance sleep state.If external ECG Acquisition Device carries out signals collecting, then bluetooth module is automatically into work
State.Only interrupting detection program during sleep state in bluetooth module to run, now power consumption is extremely low, Ji Huke
Ignore.If super low-power consumption sensor controller detects that external ECG Acquisition Device carries out signals collecting, vertical
I.e. in bluetooth module, master controller transmits interrupt instruction, wakes up main control module in bluetooth module up and runs.
(2) this Bluetooth chip uses finer partition management, by data receiver, storage with data to unofficial biography
Defeated separation, in order to manage independently and run, mixed signal microcontroller the signal transmitted is first in main control
Being received in module, store, main control module is worked by main controller controls, now RF core module
Wouldn't work, when signal demand outwards transmits, under master controller effect, signal is conveyed into RF core
Module, main control module enters sleep state immediately, association controller control under, through digital phase-locked loop,
DSP modem and amplifier process, antenna this signal is outwards transmitted transmission,
This bluetooth module, in addition to the characteristic possessing super low-power consumption, also utilizes up-to-date bluetooth standard V4.0 to provide one
Individual platform, in order to include wifi, UWB wireless radio-frequency in Bluetooth technology, by high-speed transfer and ultralow merit
Consumption organically combines, it is possible to achieve the present embodiment and other are from the information between global manufacturer's distinct device
Alternately, information sharing is carried out.Additionally, the electrocardiosignal utilizing the present embodiment to collect is possible not only to can
Electrocardiographic wave and HR values is shown, it is also possible to sent out by bluetooth module on the liquid crystal display of object wearing device
Deliver to mobile terminal, calculate other health parameters further, and result is sent back the liquid crystal of wearable device
Show on display, it is also possible to testing result and calculated health parameters are passed through mobile
The wireless network of terminal is sent to remote medical monitor center and hospital, it is achieved long distance monitoring and tele-medicine.
The power management module of the present embodiment takes solar recharging and charge power supply two kinds of powering modes of charging.
The structure of power management module as shown in Figure 4, is discharged electric by solar charging circuit (see Fig. 7), solar energy
Road (see Fig. 8), solar charging controller (see Fig. 5 (a) and Fig. 5 (b)), solar energy discharge controller
(see Fig. 6), solar energy interface, accumulator interface, loading interfaces, accumulator composition.Solaode with
Solar energy interface connects, and accumulator interface is connected with accumulator, and accumulator can also be with external charging power supply phase
Connecing, loading interfaces connects with described mixed signal microcontroller.Solar charging circuit realizes solaode
To the charging process of accumulator, solar energy discharge circuit realizes accumulator mixed signal in ECG detection device
Microcontroller, bluetooth module, liquid crystal display, the discharge process of display lamp, solar charging controller control
Solar charging circuit processed works, and solar energy discharge controller controls the work of solar energy discharge circuit.Solar energy
Battery is placed on wrist strap or the bracelet of wearable device in the present embodiment.Power management module takes solar charging
During power mode, the solar recharging module being made up of solar charging circuit and solar charging controller with by
The solar energy discharge module of solar energy discharge circuit and solar energy discharge controller composition is independent of one another, charging and
Discharge process is independently carried out, such that it is able to power consumption is greatly lowered, extends standby, the use time further.
In the solar charging power mode of power management module, use polysilicon high-effect, high-photoelectric transformation efficiency thin
Membranous type solaode, this polysilicon membrane type solaode is keeping while high-photoelectric transformation efficiency,
Make solaode be able to filming, on the one hand reduce the volume of solaode, it is provided that more comfortable
Wearable experience, on the other hand, reduces the production cost of solaode, improves the city of the present embodiment
Field competitiveness.
Concrete, shown in the circuit diagram of described solar charging controller such as Fig. 5 (a), U2 starting voltage compares
With concussion effect, wherein U2A is that core controls element, and VD3 is red and green color indication LED lamp, is used for
Instruction charging duty, is driven by U2B, according to the parameter index of rechargeable battery, passes through precision potentiator
RV1 sets float charge voltage, and RT1 is critesistor, float charge voltage value during for finely tuning different temperatures.When
When there is over-charging of battery once in a while, switch SW2 is connected higher float charge voltage can be set, play compensating equalization
Effect.VT2 is on and off switch, and VD4 is Schottky diode, prevents accumulator to solaode side
To electric discharge, VD5 plays accumulator protecting reversal connection effect (see Fig. 5 (b)), the fuse fuse when reverse polarity connection
Blowing, protection circuit remainder exempts from damage.When cell voltage is less than the float charge voltage set, U2A
Output high level, LED indicates redness, optocoupler conducting to enable switching tube VT2, and solaode is to accumulator
Charging, enters floating charge state when charging voltage reaches to set float charge voltage value, and LED enters double-colored flicker and refers to
Show state.
Concrete, the circuit diagram of described solar energy discharge controller as shown in Figure 6, will switch S1 switched on
During position, for electrical activation integrated transporting discharging work, now, if battery tension is higher than LVD (Low
Voltage Directive, LVD) magnitude of voltage, voltage comparator output low-voltage, VT5 ends, top half electricity
Road drives VT3, and accumulator is load normal power supply, if battery tension is less than LVD magnitude of voltage, VT5
Conducting makes break-make control end output low-voltage be turned off by VT3, cuts off load power source, for avoiding being supported on LVD
Carry out make-break operation near magnitude of voltage repeatedly, now, switch S1 is switched to off position with self-locking, simultaneously
Turning off discharge control system energy-conservation to realize, light emitting diode VD14 is in order to point out cell voltage close to LVD
Magnitude of voltage, regulator potentiometer RV2 scalable LVD magnitude of voltage.
Concrete, described solar charging circuit figure is as it is shown in fig. 7, by single phase bridge type rectifier circu D and electricity
Sense L filter circuit composition filter unit, D can make solaode all the time to accumulator charging and accumulator not
Meeting is to solar cell for supplying power, and solaode produces alternating current or anti-with accumulator when light cataclysm
When connecing, can only charge to accumulator, after filter circuit filter rectification, the steady ripple of output voltage, makes charging current
More stable.
Concrete, described solar energy discharge circuit figure as shown in Figure 8, takes two-stage electrical protective device, in case
Current rush that extraneous short circuit or other situations cause and damage accumulator and other electronic components, the first order
Protection gathers two sections of voltages of high-accuracy resistance R, when satisfied setting maximum discharge current and high-accuracy resistance
Long-pending and continue 20 seconds, confirm short circuit, mixed signal microprocessor controls R11 cut off discharge loop.The
Circuit, for preventing first order electric current excessive and not continuing 20 seconds, will be caused damage, now increase by second class protection
Resettable fuse, when the electric current flowed through reaches rated value, resettable fuse temperature rises, and resistance is fast
Speed increases, and electric current reduces rapidly, and when having served as stream disappearance, electrical fuse automatically reverts to original state.
As it is shown in figure 9, the workflow of the present embodiment mixed signal microcontroller is as follows:
When receiving after the digital signal of integrated simulation front end, successively the electrocardiosignal collected is used
The algorithm that low pass smooths realizes low-pass filtering, uses filter method based on singular value decomposition method to remove myoelectricity and does
Disturb and motion artifacts, the Hz noise after using in adaptivelinear neural network suppression gatherer process and gathering,
Use the cubic spline function differential technique in polynomial interopolation method that baseline drift is corrected, finally use
Wavelet Transform carries out signal noise silencing, data compression and inflection point detection, and utilizes wavelet transformation multiple dimensioned
Under the bank of filters characteristic that has, it is achieved the differentiation of corresponding QRS wave and other waveforms, if having received all
Electrocardiographic wave and HR values are then shown on a display screen by signal, immediately system finishing task, otherwise continue
The digital signal of AFE (analog front end) transmission is collected in continued access.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not by above-mentioned reality
Execute the restriction of example, the change made under other any spirit without departing from the present invention and principle, modification,
Substitute, combine, simplify, all should be the substitute mode of equivalence, within being included in protection scope of the present invention.
Claims (8)
1. ECG detection device based on wearable device, it is characterised in that include ECG Acquisition Device, integrated
AFE (analog front end), mixed signal microcontroller, bluetooth module, display device, power management module, solar energy
Battery, input equipment and display lamp, described ECG Acquisition Device includes that the first EGC sensor and the second electrocardio pass
Sensor, the first EGC sensor is arranged at the back side of wearable device shell, with contact skin, the second electrocardio
Sensor is arranged at wearable device outer casing frontispiece or frame；ECG Acquisition Device is connected with integrated simulation front end,
Integrated simulation front end is connected with mixed signal microcontroller by SPI, and bluetooth module passes through UART and mixes
Signal microcontroller is connected, and bluetooth module is connected with external network；Power management module and solaode phase
Even, the two for for mixed signal microcontroller, bluetooth module, display device in ECG detection device, refer to
Show that lamp is powered；Display device, input equipment, display lamp are connected with mixed signal microcontroller respectively, and by
Mixed signal microprocessor controls works, and described input equipment is for starting the ECG detecting merit of wearable device
Can, display lamp is for showing the ECG detecting functional status that wearable device is presently in；
Described bluetooth module include main control module, RF core module, universal peripheral interface module,
Sensor interface module and antenna, described main control module is used for receiving, storing mixed signal microcontroller biography
The signal come, and when signal demand outwards transmits, by incoming for signal RF core module, main control module
Including wire be connected master controller, jtag interface, ROM, flash memory, SRAM；Described RF core mould
Block, for when signal demand outwards transmits, receives the signal that main control module is incoming, and by signal by antenna
Outwards transmission, RF core module includes association's controller that wire is connected, digital phase-locked loop, DSP modulatedemodulate
Adjusting device, SRAM, ROM and amplifier, amplifier is connected with antenna；Described antenna is for sending out signal
Deliver to outside mobile terminal, and receive mobile terminal feedback result, and feedback result is sent to display device
Display；The I that universal peripheral interface module is connected by wire2C, UART and SPI form；Sensor connects
Mouth die block includes sensor controller, ADC and the comparator that wire is connected；Main control module is respectively by leading
Line is connected with RF core module, universal peripheral interface module and sensor interface module.
ECG detection device based on wearable device the most according to claim 1, it is characterised in that
Described power management module include solar charging circuit, solar energy discharge circuit, solar charging controller,
Solar energy discharge controller, solar energy interface, accumulator interface, loading interfaces and accumulator, the wherein sun
Can battery be connected with solar energy interface, accumulator interface is connected with accumulator, accumulator be additionally provided with interface for
It is connected with external charging power supply；Loading interfaces is connected with described mixed signal microcontroller；Solar charging is automatically controlled
Device processed controls solar charging circuit work, and solaode is charged to accumulator by solar charging circuit；
Solar energy discharge controller controls the work of solar energy discharge circuit, and accumulator is centripetal by solar energy discharge circuit
In electric detection means, mixed signal microcontroller, bluetooth module, display device, display lamp are powered.
ECG detection device based on wearable device the most according to claim 2, it is characterised in that
The solar recharging module being made up of described solar charging circuit and described solar charging controller with by institute
The solar energy discharge module stating solar energy discharge circuit and described solar energy discharge controller composition is independent of one another,
Charging and discharging process is independently carried out.
4., according to the ECG detection device based on wearable device described in claim 1 or 3, its feature exists
In, described solaode uses polysilicon membrane type solaode.
ECG detection device based on wearable device the most according to claim 1, it is characterised in that
Described main control module signal is passed to RF core module laggard enter sleep state；
Described sensor controller is for the duty of the external ECG Acquisition Device of perception, if external electrocardiogram acquisition
Device does not carry out signals collecting, then control bluetooth module automatically into sleep state.
ECG detection device based on wearable device the most according to claim 1, it is characterised in that
Described bluetooth module uses bluetooth standard V4.0, in order to include wifi, UWB wireless radio-frequency in bluetooth skill
Art.
ECG detection device based on wearable device the most according to claim 1, it is characterised in that
The ADS1293 chip of TI company is selected in described integrated simulation front end, for entering the electrocardiosignal collected
Row filtering, automatic gain, AD conversion.
ECG detection device based on wearable device the most according to claim 1, it is characterised in that
The MSP430FR5739 microcontroller of TI company selected by described mixed signal microcontroller, for collecting
The electrocardiosignal algorithm that uses low pass smooth carry out low-pass filtering, use filter based on singular value decomposition method
Ripple method removes myoelectricity interference and motion artifacts, uses in adaptivelinear neural network suppression gatherer process and gathers
After Hz noise, use the cubic spline function differential technique in polynomial interopolation method that baseline drift is carried out
Correct, finally use Wavelet Transform to carry out signal noise silencing, data compression and inflection point detection, and utilize little
The bank of filters characteristic that wave conversion has under multiple dimensioned, it is achieved corresponding QRS wave and the differentiation of other waveforms.
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