CN104510478B - Wearable device based blood oxygen saturation degree detection device - Google Patents
Wearable device based blood oxygen saturation degree detection device Download PDFInfo
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- CN104510478B CN104510478B CN201410747825.XA CN201410747825A CN104510478B CN 104510478 B CN104510478 B CN 104510478B CN 201410747825 A CN201410747825 A CN 201410747825A CN 104510478 B CN104510478 B CN 104510478B
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- oxygen saturation
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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
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
- A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0015—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
- A61B5/0022—Monitoring a patient using a global network, e.g. telephone networks, internet
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0204—Operational features of power management
- A61B2560/0209—Operational features of power management adapted for power saving
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0204—Operational features of power management
- A61B2560/0214—Operational features of power management of power generation or supply
Abstract
The invention discloses a wearable device based blood oxygen saturation degree detection device which comprises a blood oxygen sensor, an integrated analog front end, a mixed signal microcontroller, a Bluetooth module, a display device, a power supply management module, a solar cell, an input device and an indicating lamp. The blood oxygen sensor is arranged on the back side of the wearable device and is in contact with the skin. The blood oxygen sensor is connected with the integrated analog front end, the integrated analog front end is connected with the mixed signal microcontroller, and the Bluetooth module is connected with the mixed signal microcontroller and an external network respectively. The power supply management module and the solar cell are connected and used for detecting power supply of relevant parts in the device. the input device is used for starting a blood oxygen saturation degree detection function of the wearable device, and the indicating lamp is used for displaying the blood oxygen saturation degree detection function state of the wearable device. The wearable device based blood oxygen saturation degree detection device is small in size, accurate in result and very low in power consumption, can utilize solar energy to achieve charging and facilitates anytime anywhere blood oxygen saturation degree monitoring of outdoor exercises and hypoxic diseases.
Description
Technical field
The present invention relates to vital sign parameter detection means research field, specifically refer to a kind of blood based on wearable device
Oxygen saturation detection means.
Background technology
The oxygen of in the air enters blood after human lung swaps, and is supplied to whole body in conjunction with hemoglobin,
Maintain the eubolism of cell.Blood oxygen saturation (spo2) is used for reflecting oxygen-containing level, blood oxygen saturation in this blood
Refer to that the capacity of HbO2 Oxyhemoglobins in blood (hbo2) accounts for the percentage ratio of whole hemoglobin (hb) capacity.In normal condition
Under, the blood oxygen saturation of human body is maintained at 98%, is typically not less than 94%, if blood oxygen saturation is too low, shows to organize
Less than sufficient oxygen, or oxygen can not be made full use of, lead to metabolism, function, even the morphosiss generation ANOMALOUS VARIATIONS of tissue, lack
Anoxemia can cause the death of neuron for 4 minutes, can threat to life when serious.Therefore, blood oxygen saturation is carried out to human body
Detection is extremely important.On the other hand, with the raising of people's living standard, the health perception of people increasingly strengthens, whenever and wherever possible
The demand of detection physiological parameter occurs therewith, and in recent years, the wearable medical product quickly growing exactly meets this demand
Ideal product.By blood oxygen detection function be transplanted on wearable medical product, on the one hand can with real-time monitoring heart and brain hypoxic condition,
Histogenous hypoxia disease, respiratory hypoxia disease and sleep apnea syndrome, are user-friendly for self health status
Assessment, take measures symptom management early, at utmost avoids the too low health hazard causing of blood oxygen saturation or life danger
Danger.On the other hand, blood oxygen saturation data can be provided in real time for extreme sport, high-intensity exercise and plateau outdoor sports, have
Beneficial to according to blood oxygen saturation data real-time adjustment exercise intensity, formulating, changing exercise program, it is reduced to danger in blood oxygen saturation
Stop motion or leave anoxia area before the value of danger, it is to avoid anoxia that hyperkinesia causes injures, and more can avoid outer shroud out of office
The life danger brought by the long-time faintness that anoxia leads under border.
At present, blood oxygen saturation detection function is common in various monitors or monitor, for monitoring, rescue, health
Evaluation provides a kind of objective vital sign parameter, however, common blood oxygen saturation detection means on these markets is most
Using transmission-type method for detecting blood oxygen saturation, using fingerstall or refer to folder and complete to detect, not only volume is big, operation is inconvenient, easypro
Appropriateness is poor, more causing tension when detecting, bringing mental pressure to tester, thus leading to result distortion.Additionally, it is existing
Blood oxygen saturation detection means power supply almost all using battery power or power source charges by the way of, this power supply mode makes to make
Significantly limited with the time it is impossible to meet the portable demand of growing device, nor met whenever and wherever possible
The wearable demand of real-time detection is carried out according to tester's demand.
Content of the invention
It is an object of the invention to overcoming shortcoming and the deficiency of prior art, provide a kind of blood oxygen based on wearable device
Saturation detection means, this device is disposed in existing Wearable device, for example intelligent watch, Intelligent bracelet etc., tool
Have the advantages that compact, easy to use, use time are long.
The purpose of the present invention is realized by following technical scheme: the blood oxygen saturation detection dress based on wearable device
Put, including blood oxygen transducer, integrated simulation front end, mixed signal microcontroller, bluetooth module, display device, power management mould
Block, solaode, input equipment and display lamp, blood oxygen transducer is arranged at the back side of wearable device, contacts with skin, blood
Oxygen sensor is connected with integrated simulation front end, and by integrated simulation front-end control and power supply, spi is passed through in integrated simulation front end
(serial peripheral interface, Serial Peripheral Interface (SPI)) is connected with mixed signal microcontroller, and bluetooth module passes through
Uart (universal asynchronous receiver/transmitter, universal asynchronous receiving-transmitting transmitter) with mix
Signal microcontroller is connected, and bluetooth module is connected with external network；Power management module is connected with solaode, and the two is used for
For integrated simulation front end, mixed signal microcontroller, bluetooth module, display device, display lamp in blood oxygen saturation detection means
Power supply,；Display device, input equipment, display lamp are connected with mixed signal microcontroller respectively, and by mixed signal microcontroller
Control work, described input equipment is used for starting the blood oxygen saturation detection function of wearable device, and display lamp can for display
The blood oxygen saturation detection functional statuses that object wearing device is presently in.
Preferably, to include solar charging circuit, solar energy discharge circuit, solar charging automatically controlled for described power management module
Device processed, solar energy discharge controller, solar energy interface, accumulator interface, loading interfaces and accumulator, wherein solaode with
Solar energy interface connects, and accumulator interface is connected with accumulator, and accumulator is additionally provided with interface for being connected with external charging power supply；
Loading interfaces are connected with described mixed signal microcontroller；Solar charging controller controls solar charging circuit work, too
Sun can pass through solar charging circuit to accumulator charging by battery；Solar energy discharge controller controls solar energy discharge circuit work
Make, accumulator passes through solar energy discharge circuit to integrated simulation front end, mixed signal microcontroller in blood oxygen saturation detection means
Device, bluetooth module, display device, display lamp are powered.
Preferably, the solar recharging module being made up of described solar charging circuit and described solar charging controller
With the solar energy discharge module being made up of described solar energy discharge circuit and described solar energy discharge controller independently of one another, charge
Independently carry out with discharge process.Such that it is able to power consumption is greatly lowered, extend standby, use time further.
Further, described solaode adopts polysilicon membrane type solaode.This battery be by high-effect,
The polysilicon membrane type photoelectric material of high-photoelectric transformation efficiency obtains, and therefore has the advantages that small volume, power-on time are long.
Preferably, 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 the signal that mixed signal microcontroller transmits, and
When signal demand outwards transmits, by incoming for signal RF core module, main control module include wire be connected master controller,
(read-only memory read-only deposits for jtag (joint test action group, joint test working group) interface, rom
Reservoir), flash memory, sram；Described RF core module is used for, when signal demand outwards transmits, receiving main control module incoming
Signal, and signal is outwards transmitted by antenna, RF core module includes the connected association's controller of wire, digital phase-locked loop, dsp
Modem, sram, rom and amplifier, amplifier is connected with antenna；Described antenna is used for sending signal to outside shifting
Dynamic terminal, and receive mobile terminal feedback result, feedback result is sent to display device and shows；Universal peripheral interface mould
The i that block is connected by wire2C, uart and spi form；Sensor controller that sensor interface module is connected by wire, adc
(analog to digital converter, analog-digital converter) and comparator form；Main control module passes through to lead respectively
Line is connected with RF core module, universal peripheral interface module and sensor interface module.
Further, described main control module enters sleep state after signal is passed to RF core module.Thus
The power consumption of bluetooth module can be substantially reduced.
Further, described sensor controller is used for perceiving the working condition of external blood oxygen transducer, if external blood
Oxygen sensor does not carry out signals collecting, then control bluetooth module automatically into sleep state.Such that it is able to substantially reduce bluetooth
The power consumption of module.
Further, described bluetooth module adopts bluetooth standard v4.0, in order to receive wifi, uwb wireless radio-frequency
Enter Bluetooth technology.Thus high-speed transfer and super low-power consumption are organically combined, it is possible to achieve the present invention is derived from whole world system with other
Make the information exchange between business's distinct device, carry out information sharing.
Preferably, described blood oxygen transducer includes LED lamp and receives head, and LED lamp is by described integrated simulation front-end driven simultaneously
Power supply, receives head and is used for receiving the sent light wave of LED lamp in the reflected light after tissue.
Specifically, the afe4400 chip of ti company is selected in described integrated simulation front end, comprises one and has integrated analog digital conversion
The control module of LED lamp transmitting in the receptor of device, a driving blood oxygen transducer, for filtering to the blood oxygen signal collecting
Ripple, light path separation, automatic gain, ad conversion, can also drive the LED lamp in blood oxygen probe simultaneously.
Specifically, the msp430fr5739 microcontroller of ti company selected by described mixed signal microcontroller, for adopting
The oxygen saturation signal collecting carries out medium filtering computing, moving averages computing and lms computing, thus realizing to blood oxygen saturation
Degree signal eliminates isolated noise spot, low-pass filtering and adaptive-filtering, obtains smooth signal distributions, and further using fortune
Dynamic backoff algorithm removes the motion artifact producing in motor process.
The present invention compared with prior art, has the advantage that and beneficial effect:
(1) the blood oxygen saturation detection means of the present invention is based on wearable device, overcomes traditional blood oxygen saturation detection
The use limitation that in device, wired connection is brought, and blood oxygen saturation anywhere or anytime can be realized by wearable device
Detection.Compact, wearable, accurately, power consumption is extremely low, available solar recharging for result, be convenient for outdoor activity or
The blood oxygen saturation of ischemic disease is monitored whenever and wherever possible, farthest reduces the infringement to body for the anoxia and life danger.
(2) present invention adopts reflective blood oxygen saturation detection, and in blood oxygen transducer, LED lamp and reception head are placed in homonymy,
Overcome LED lamp and reception head in transmission-type method for detecting blood oxygen saturation in prior art to be placed in both sides and must use and refer to press from both sides
Or the detection method of fingerstall, not only compact, easy to operate, comfort level is high, more can avoid the psychology brought when detecting
Pressure, thus obtain more accurately testing result.
(3) bluetooth module of the present invention, is on the one hand furnished with autonomous super low-power consumption sensor controller, can independently perceive
The working condition of external blood oxygen transducer, if external blood oxygen transducer does not carry out signals collecting, bluetooth module automatically into
Sleep state.If external blood oxygen transducer carries out signals collecting, bluetooth module is automatically into working condition；On the other hand adopt
Finer partition management, by data receiver, storage and data, outwards transmission separates, to manage independently and to run, by mixing
The signal that signal microcontroller transmits carries out receiving first in main control module, stores, and main control module is by master controller control
Work processed, now RF core module wouldn't work, when signal demand outwards transmits, master controller effect under signal is passed
Input radio frequency nucleus module, main control module enters sleep state immediately, association controller control under, through digital phase-locked loop,
Dsp modem and amplifier are processed, and by antenna, this signal are outwards transmitted transmission.Compared to prior art, two above
Aspect can largely reduce the power consumption of bluetooth module, thus extending standby and use time.
(4) bluetooth module that the present invention adopts, compared to prior art, can largely reduce power consumption, prolongation is treated
Machine and use time, support bluetooth, wifi, uwb wireless radio-frequency simultaneously, and the achievable present invention is derived from the whole world with other and manufactures
Testing result not only can be sent to intelligent terminal, be calculated health further by the information exchange between business's distinct device
Parameter, can be more remote medical monitor and distance medical diagnosis provide and provide powerful support for, and compared with prior art, have more extensive
The scope of application, it is possible to obtain more rich monitoring information, thus to user bring preferably, more accurately, more practical
Wearable medical treatment experience.
(5) power management module of the present invention takes solar recharging and charge power supply two kinds of powering modes of charging.Wherein
Power management module solar charging power mode, using high-effect, high-photoelectric transformation efficiency polysilicon membrane type solar energy
Battery, the solaode one side that this novel optoelectronic materials are obtained can reduce battery volume, thus bringing 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, when
After being exhausted by the electricity that charge power supply obtains, the high-effect electricity coming of changing of recycling solaode proceeds blood oxygen
The detection of saturation, breaches blood oxygen saturation in prior art and detects by limiting to that battery electric quantity is limited.Meanwhile, power management
The solar charging power mode of module takes charging module and discharge module structure independent of each other and working method, charging and discharging
Process need not be carried out simultaneously, compared to prior art, power consumption can be greatly lowered, extend standby, use time further.Many
The use of polycrystal silicon film type solaode can also be greatly lowered cost, increases the market competitiveness of the present invention.
(6) present invention adopts integrated simulation front end so that signal processing is in hgher efficiency, and stability is remarkably reinforced.Overcome
In detection means, test device was complicated in the past, needed, using a large amount of electronic components, to be not easy to realize the shortcoming of portability, additionally,
In prior art, light intensity signal is converted to after the signal of telecommunication downward Primary Transmit in the way of analog voltage signal, until a/d conversion
Place just realizes digitized, and during this, signal is highly prone to the interference in the external world and introduces noise, and the present invention passes through using integrated
AFE (analog front end), overcomes this defect, greatly improves the accuracy of measurement result.
Brief description
Fig. 1 is the hardware block diagram of the present embodiment.
Fig. 2 is the blood oxygen module composition figure of the present embodiment.
Fig. 3 is the composition structure chart of the bluetooth module of the present embodiment.
Fig. 4 is the power management module composition figure 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 storage battery reverse connection protection circuit figure of solar charging controller in the present embodiment power management module.
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.
Figure 10 is the workflow diagram of the present embodiment mixed signal microcontroller.
Specific embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention do not limit
In this.
Embodiment 1
As shown in figure 1, the hardware composition of the present embodiment includes blood oxygen transducer, integrated simulation front end, mixed signal micro-control
Device processed, bluetooth module, display device (i.e. liquid crystal display), power management module, solaode, input equipment (i.e. button)
And display lamp.Blood oxygen transducer is connected with integrated simulation front end, and by integrated simulation front-end control and power supply, integrated simulation front end
It is connected with mixed signal microcontroller by spi, mixed signal microcontroller is connected with external network by bluetooth module, bluetooth
Module is connected with mixed signal microcontroller by uart, and power management module and solaode are connected to blood oxygen saturation inspection
Survey integrated simulation front end, mixed signal microcontroller, bluetooth module, liquid crystal display, display lamp in device to power, liquid crystal display
Device, button are connected with mixed signal microcontroller with display lamp, and are worked by mixed signal microprocessor controls, and described button is used
In the blood oxygen saturation detection function of starting wearable device, display lamp is used for showing that wearable device is in blood oxygen saturation inspection
Brake state.In Fig. 1, solid black lines arrow represents current trend, and hollow arrow represents that the oxygen saturation signal collecting is walked
To dotted arrow represents that control instruction is moved towards.
Specifically, integrated simulation front end described in the present embodiment selects ti company afe4400 chip, and this chip comprises one
There is the low-noise receiver of integrated analog digit converter, a control module driving LED lamp transmitting in blood oxygen transducer, and have
There is the diagnostic function for sensor and led fault detect, here the oxygen saturation signal collecting is filtered,
Light path separation, automatic gain, ad conversion, thus obtaining blood oxygen volume waveform and then showing on a liquid crystal display, also simultaneously
The LED lamp in blood oxygen transducer can be driven.
Specifically, the msp430fr5739 microcontroller of ti company selected by mixed signal microcontroller described in the present embodiment,
This microcontroller is super low-power consumption type, here the oxygen saturation signal collecting is carried out with medium filtering computing, slides and put down
All computing and lms computings, thus realize oxygen saturation signal is eliminated isolated noise spot, low-pass filtering and self adaptation filter
Ripple, obtains smooth signal distributions, and adopts movement compensating algorithm to remove the motion artifact producing in motor process further, from
And obtain accurate blood oxygen saturation numerical value and HR values and show on a liquid crystal display.
As shown in Fig. 2 the present embodiment adopts bounce technique to detect blood oxygen saturation, blood oxygen transducer used by LED lamp 1 and connects
Receive 2 compositions, theoretical according to scattering of light, light wave when by tissue (skin 3, subcutaneous tissue 4) except absorbed with
Outward, there is also another kind of phenomenon, that is, scatter.Because tissue is non-equally distributed, light can not be strict in tissue
According to straightline propagation, strong scattering phenomenon, a portion light warp for example can occur when running into venule 5, arteriole 6
Return to incidence surface after crossing Multiple Scattering, macroscopically show as reflected light.Blood oxygen is carried out by the light intensity detecting this Shu Guang
The detection of saturation, is the general plotting of the present embodiment blood oxygen transducer.Described blood oxygen transducer is placed on described in the present embodiment can
The backboard of object wearing device, is contacted with skin.
As shown in figure 3, the bluetooth module of the present embodiment, including main control module, RF core module, common peripheral devices
Interface module and sensor interface module.Master controller that wherein main control module is connected by wire, jtag, rom, flash memory,
Sram forms；Association's controller that RF core module is connected by wire, digital phase-locked loop, dsp modem, sram, rom and
Amplifier forms, and amplifier is connected with antenna；The i that universal peripheral interface module is connected by wire2C, uart and low-power consumption
Spi forms；Super low-power consumption sensor controller, adc and low power consumption comparator that sensor interface module is connected by wire form；
Main control module passes through wire and RF core module, universal peripheral interface module and sensor interface module phase respectively
Even.
Specifically, 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 perceive external blood oxygen and pass
The working condition of sensor, if external blood oxygen transducer does not carry out signals collecting, bluetooth module is automatically into sleep state.If
External blood oxygen transducer carries out signals collecting, then bluetooth module is automatically into working condition.In bluetooth module during sleep state only
Interruption detection program is had to run, now power consumption is extremely low, almost negligible disregards.If super low-power consumption sensor controller detects outer
Connect blood oxygen transducer and carry out signals collecting, immediately to master controller transmission interrupt instruction in bluetooth module, wake up in bluetooth module
Main control module runs.
(2) this Bluetooth chip adopts finer partition management, and by data receiver, storage and data, outwards transmission separates,
To manage independently and to run, the signal being transmitted by mixed signal microcontroller carries out receiving first in main control module, deposits
Storage, main control module is worked by main controller controls, and now RF core module wouldn't work, when signal demand outwards transmits
When, under master controller effect, signal transmission is entered radio frequency nucleus module, main control module enters sleep state immediately, in association's control
Under device processed controls, process through digital phase-locked loop, dsp modem and amplifier, by antenna, by this signal, outwards transmission is sent out
Send,
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 to put down
Platform, in order to wifi, uwb wireless radio-frequency is included Bluetooth technology, high-speed transfer and super low-power consumption is organically combined, permissible
Realize the present embodiment and other information exchanges between global manufacturer's distinct device, carry out information sharing.Additionally, utilizing
The oxygen saturation signal that the present embodiment collects not only can show on the liquid crystal display of wearable device that blood oxygen is held
Long-pending ripple, blood oxygen saturation numerical value and HR values, it is also possible to be sent to mobile terminal by bluetooth module, calculate other further
Health parameters, and result is sent back shown on the liquid crystal display of wearable device, it is also possible to by testing result
With calculated health parameters, remote medical monitor center and hospital are sent to by the wireless network of mobile terminal, realize remote
Journey 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.Power supply pipe
The structure of reason module is as shown in figure 4, by solar charging circuit (see Fig. 7), solar energy discharge circuit (see Fig. 8), solar charging
Electric controller (see Fig. 5 (a) and Fig. 5 (b)), solar energy discharge controller (see Fig. 6), solar energy interface, accumulator interface, load
Interface, accumulator composition.Solaode is connected with solar energy interface, and accumulator interface is connected with accumulator, and accumulator also may be used
To connect with external charging power supply, loading interfaces are connected with described mixed signal microcontroller.Solar charging circuit is realized too
Sun can charging process from battery to accumulator, solar energy discharge circuit realizes accumulator to integrated in blood oxygen saturation detection means
AFE (analog front end), mixed signal microcontroller, bluetooth module, liquid crystal display, the discharge process of display lamp, solar charging electric control
Device controls solar charging circuit work, and solar energy discharge controller controls the work of solar energy discharge circuit.Solaode is put
On the wrist strap of wearable device or bracelet in the present embodiment.When power management module takes solar charging power mode, by the sun
The solar recharging module of energy charging circuit and solar charging controller composition is put with by solar energy discharge circuit and solar energy
Independently of one another, charging and discharging process is independently carried out the solar energy discharge module of electric controller composition, such that it is able to significantly drop
Low-power consumption, extends standby, use time further.In the solar charging power mode of power management module, using high-effect, bloom
The polysilicon membrane type solaode of photoelectric transformation efficiency, this polysilicon membrane type solaode is keeping high opto-electronic conversion
So that solaode is able to filming while efficiency, on the one hand reduce the volume of solaode, provide more comfortable
Wearable experience, on the other hand, reduces the production cost of solaode, improves the market competitiveness of the present embodiment.
Specifically, shown in the circuit diagram of described solar charging controller such as Fig. 5 (a), u2 starting voltage compares and shakes work
With wherein u2a is core control element, and vd3 indicates LED lamp for red and green color, for indicating charging working condition, is driven by u2b
Dynamic, according to the parameter index of rechargeable battery, float charge voltage is set by precision potentiator rv1, rt1 is critesistor, for micro-
Adjust float charge voltage value during different temperatures.When there is over-charging of battery once in a while, switch sw2 being connected higher floating charging can be set
Pressure, plays the effect of compensating equalization.Vt2 is on and off switch, and vd4 is Schottky diode, prevents accumulator to solaode
Discharge in direction, vd5 plays accumulator protecting reversal connection effect (see Fig. 5 (b)), the fuse fuse opening when reverse polarity connection, protection electricity
Road remainder exempts from damage.When cell voltage is less than the float charge voltage setting, u2a exports high level, and led instruction is red,
Optocoupler conducting enables switching tube vt2, and solaode charges to accumulator, enters when charging voltage reaches setting float charge voltage value
Enter floating charge state, led enters double-colored flicker instruction state.
Specifically, the circuit diagram of described solar energy discharge controller be as shown in fig. 6, when will switch the switched on position of s1,
For electrical activation integrated transporting discharging work, now, if battery tension be higher than LVD (low voltage directive,
Lvd) magnitude of voltage, voltage comparator exports low-voltage, and vt5 ends, top half drives vt3, and accumulator is that load is normal
Power supply, if battery tension is less than lvd magnitude of voltage, vt5 conducting makes break-make control end output low-voltage turn off vt3, cuts
Disconnected load power source, repeatedly carries out make-break operation for avoiding being supported near lvd magnitude of voltage, now, switch s1 is switched to pass
Position, with self-locking, simultaneously turns off discharge control system to realize energy-conservation, light emitting diode vd14 is in order to point out cell voltage close
Lvd magnitude of voltage, regulator potentiometer rv2 scalable lvd magnitude of voltage.
Specifically, described solar charging circuit figure is as shown in fig. 7, by single phase bridge type rectifier circu d and inductance l filtered electrical
Road form filter unit, d can make solaode all the time to accumulator charge and accumulator will not to solar cell for supplying power, and
Solaode produces alternating current or during with reverse connection of accumulator in light cataclysm, can only charge to accumulator, filter circuit
After filter rectification, the steady ripple of output voltage, makes charging current more stable.
Specifically, described solar energy discharge circuit figure is as shown in figure 8, take two-stage electrical protective device, in case extraneous short circuit
Or the current rush that causes of other situations and damage accumulator and other electronic components, first order protection gathers high-accuracy resistance
Two sections of voltages of r, set the long-pending of maximum discharge current and high-accuracy resistance and continue 20 seconds when meeting, confirm short circuit, by mixing
Close signal microprocessor controls r11 cut-out discharge loop.The second level is protected as preventing first order electric current excessive and not continuing 20 seconds,
Circuit will be caused damage, now increase resettable fuse, when the electric current flowing through reaches rated value, resettable fuse temperature
Degree rises, and resistance increases rapidly, and electric current reduces rapidly, and when excessively stream disappears, electrical fuse automatically reverts to original state.
As shown in figure 9, the workflow of the present embodiment is as follows:
Open wearable device main switch after, system initialization, if the time that pushes button more than 3 seconds, blood oxygen saturation
Detection function is opened, and otherwise blood oxygen saturation detection function is not turned on, and blood oxygen saturation detection function drives blood oxygen to pass after opening
LED lamp transmitting circulation light wave in sensor, if meeting timing condition, integrated simulation front end is entered to the oxygen saturation signal of collection
Row filtering, light path separation, automatic gain, ad conversion, otherwise return and continue executing with led transmitting circulation, and the signal after process enters
Mixed signal microcontroller carries out storing, computing, and operation result can send to bluetooth module and carry out data is activation it is also possible to send
Carry out the display of blood oxygen volume waveform, blood oxygen saturation numerical value and HR values to liquid crystal display, now control system knot
Bundle task.
As shown in Figure 10, the workflow of the present embodiment mixed signal microcontroller is as follows:
After receiving from the digital signal of integrated simulation front end, sequentially pass through medium filtering computing, moving averages fortune
Calculate and lms computing, thus realizing the digital signal from integrated simulation front end is eliminated isolated noise spot, low-pass filtering and from
Adaptive filtering, obtains smooth digital signal distribution, and adopts movement compensating algorithm to remove generation in motor process further
Motion artifact, if having received whole signals, blood oxygen volume waveform, blood oxygen saturation numerical value and HR values is shown in aobvious
Show on device, system finishing task, otherwise continue to by the digital signal of integrated simulation front end delivery.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not subject to above-described embodiment
Limit, other any spirit without departing from the present invention and the change made under principle, modification, replacement, combine, simplify,
All should be equivalent substitute mode, be included within protection scope of the present invention.
Claims (8)
1. the blood oxygen saturation detection means based on wearable device is it is characterised in that include blood oxygen transducer, before integrated simulation
End, mixed signal microcontroller, bluetooth module, display device, power management module, solaode, input equipment and instruction
Lamp, blood oxygen transducer is arranged at the back side of wearable device, contacts with skin, and blood oxygen transducer is connected with integrated simulation front end,
And by integrated simulation front-end control and power supply, integrated simulation front end is connected with mixed signal microcontroller by spi, bluetooth module
It is connected with mixed signal microcontroller by uart, bluetooth module is connected with external network；Power management module and solar-electricity
Pond is connected, the two be used for for integrated simulation front end in blood oxygen saturation detection means, mixed signal microcontroller, bluetooth module,
Display device, display lamp are powered；Display device, input equipment, display lamp are connected with mixed signal microcontroller respectively, and by mixing
Close the work of signal microprocessor controls, described input equipment is used for starting the blood oxygen saturation detection function of wearable device, refers to
Show that lamp is used for showing the blood oxygen saturation detection functional statuses that wearable device is presently in；
Described bluetooth module includes main control module, RF core module, universal peripheral interface module, sensor interface mould
Block and antenna, described main control module be used for receive, store the signal that mixed signal microcontroller transmits, and signal demand to
During outer transmission, by incoming for signal RF core module, main control module include wire be connected master controller, jtag interface,
Rom, flash memory, sram；Described RF core module is used for, when signal demand outwards transmits, receiving the incoming letter of main control module
Number, and signal is outwards transmitted by antenna, RF core module includes the connected association's controller of wire, digital phase-locked loop, dsp tune
Modulator-demodulator, sram, rom and amplifier, amplifier is connected with antenna；Described antenna is used for sending signal to outside movement
Terminal, and receive mobile terminal feedback result, feedback result is sent to display device and shows；Universal peripheral interface module
The i being connected by wire2C, uart and spi form；Sensor controller, adc and ratio that sensor interface module is connected by wire
Compared with device composition；Main control module is connect with RF core module, universal peripheral interface module and sensor by wire respectively
Mouth module is connected；
Described main control module enters sleep state after signal is passed to RF core module；Described sensor controller is used for
Perceive the working condition of external blood oxygen transducer, if external blood oxygen transducer does not carry out signals collecting, control bluetooth module
Automatically into sleep state.
2. the blood oxygen saturation detection means based on wearable device according to claim 1 is it is characterised in that described electricity
Source control module includes solar charging circuit, solar energy discharge circuit, solar charging controller, solar energy control of discharge
Device, solar energy interface, accumulator interface, loading interfaces and accumulator, wherein solaode are connected with solar energy interface, electric power storage
Pond interface is connected with accumulator, and accumulator is additionally provided with interface for being connected with external charging power supply；Loading interfaces are mixed with described
Signal microcontroller connects；Solar charging controller controls solar charging circuit work, and solaode passes through solar energy
Charging circuit charges to accumulator；Solar energy discharge controller controls the work of solar energy discharge circuit, and accumulator passes through solar energy
Discharge circuit is to integrated simulation front end, mixed signal microcontroller, bluetooth module, display dress in blood oxygen saturation detection means
Put, display lamp is powered.
3. the blood oxygen saturation detection means based on wearable device according to claim 2 is it is characterised in that by described
The solar recharging module of solar charging circuit and described solar charging controller composition is electric with by the electric discharge of described solar energy
Independently of one another, charging and discharging process is independently carried out the solar energy discharge module of road and described solar energy discharge controller composition.
4. the blood oxygen saturation detection means based on wearable device according to claim 1 or 3 is it is characterised in that institute
State solaode and adopt polysilicon membrane type solaode.
5. the blood oxygen saturation detection means based on wearable device according to claim 1 is it is characterised in that described indigo plant
Tooth module adopts bluetooth standard v4.0, in order to wifi, uwb wireless radio-frequency is included Bluetooth technology.
6. the blood oxygen saturation detection means based on wearable device according to claim 1 is it is characterised in that described blood
Oxygen sensor includes LED lamp and receives head, and LED lamp, by described integrated simulation front-end driven and power supply, receives head and is used for receiving led
The sent light wave of lamp is in the reflected light after tissue.
7. the blood oxygen saturation detection means based on wearable device according to claim 6 is it is characterised in that described collection
AFE (analog front end) is become to select the afe4400 chip of ti company, for being filtered to the oxygen saturation signal collecting, light path is divided
From, automatic gain, ad conversion, simultaneously be additionally operable to drive blood oxygen transducer in LED lamp.
8. the blood oxygen saturation detection means based on wearable device according to claim 1 is it is characterised in that described mix
Close the msp430fr5739 microcontroller that ti company selected by signal microcontroller, for entering to the oxygen saturation signal collecting
Row medium filtering computing, moving averages computing and lms computing, obtain smooth signal distributions, and adopt motion compensation further
Algorithm removes the motion artifact producing in motor process.
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| CN105310686B (en) * | 2015-08-24 | 2018-11-02 | 华南理工大学 | A kind of health service robot of achievable ECG detecting |
| CN105078445B (en) * | 2015-08-24 | 2018-11-02 | 华南理工大学 | Senior health and fitness's service system based on health service robot |
| CN105082149B (en) * | 2015-08-24 | 2017-10-20 | 华南理工大学 | A kind of health service robot of achievable blood oxygen saturation detection |
| CN105559795B (en) * | 2016-03-04 | 2018-03-16 | 上海用为医疗科技有限公司 | Wearable blood oxygen detection device and its blood oxygen transducer |
| CN105997102A (en) * | 2016-05-10 | 2016-10-12 | 华南理工大学 | Wearable brain function detection device based on NIRS |
| CN108784710A (en) * | 2018-06-27 | 2018-11-13 | 常州市第人民医院 | A kind of blood oxygen saturation monitoring instrument based on Radio Transmission Technology |
| CN109938744A (en) * | 2019-04-10 | 2019-06-28 | 昆山沃德喜乐智能科技有限公司 | A kind of breath interruption disease monitor |
| KR20240041722A (en) * | 2022-09-23 | 2024-04-01 | 삼성전자주식회사 | A device for outputting simulated vital signs and a method for operating the same |
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| WO2007084807A1 (en) * | 2006-01-18 | 2007-07-26 | Koninklijke Philips Electronics, N.V. | Automatic and secure configuration of wireless medical networks |
| AU2009246442B2 (en) * | 2008-05-14 | 2015-02-12 | Heartmiles, Llc. | Physical activity monitor and data collection unit |
| US9161697B2 (en) * | 2013-08-07 | 2015-10-20 | Dynosense, Corp. | System for measuring and recording a user's vital signs |
| CN203815443U (en) * | 2014-04-22 | 2014-09-10 | 陕西特恩电子科技有限公司 | Life monitoring and physiological and psychological interfering system |
| CN204428045U (en) * | 2014-12-08 | 2015-07-01 | 华南理工大学 | Based on the blood oxygen saturation checkout gear of wearable device |
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