CN207886208U - A kind of embedded human physiologic information non-invasive detection system - Google Patents
A kind of embedded human physiologic information non-invasive detection system Download PDFInfo
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- CN207886208U CN207886208U CN201720562269.8U CN201720562269U CN207886208U CN 207886208 U CN207886208 U CN 207886208U CN 201720562269 U CN201720562269 U CN 201720562269U CN 207886208 U CN207886208 U CN 207886208U
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Abstract
The utility model discloses a kind of embedded human physiologic information non-invasive detection system, which includes detector shell and is arranged detection circuit board and detect tank in detector enclosure interior；The both sides of detect tank are provided with infrared diode array, and the bottom of detect tank is provided with sloping platform, inclination optical filter is provided with above sloping platform, and the upper surface for tilting optical filter and sloping platform is mutually parallel；It tilts and is provided with cavity between optical filter and sloping platform, image capture module and photoelectricity volume pulse detection circuit are provided in the cavity；Detect tank is provided with finger tip chamber with the link position for tilting optical filter tilting bottom, and finger tip chamber is internally provided with finger switch.The utility model is easy to use, dust-proof anti-gray, human heart rate, blood oxygen, the multiphases human body information such as hemoglobin concentration can be monitored continuous, noninvasive, in real time, simultaneously can be easily and fast acquisition user's vein image, efficient, accurate Non-invasive detection is realized, Hospital Physical Examination measurement is widely used in.
Description
Technical field
The utility model is related to photoelectric testing sensor technical field more particularly to a kind of embedded human physiologic information without
Create detecting system.
Background technology
With the development of electronics technology, the application of embedded system has penetrated into industry-by-industry, such as network communication, consumption
Electronics, Industry Control etc., are especially widely used in terms of digital medical.Embedded technology is believed with biomedical
Number treatment technology combines, and is the inexorable trend of digital medical Instrument Development from now on.Heart rate, blood pressure, blood oxygen saturation and blood
The noninvasive easy detection of the physiological signals such as Lactoferrin, operation, transfuse blood, donate blood, nutrition generaI investigation etc. has great importance.
Traditional detection method detecting step is complicated (blood pressure measurement), or progress broken skin is needed to take blood (hemoglobin concentration detection),
Physiology and psychological burden not only are caused to testee, and the variation of hemoglobin concentration can not be detected continuously, in real time
Situation.
Believe comprising many Human Physiologies in photoplethysmographic (photo plethysmo graphic, PPG) signal
Breath, such as heart rate and blood oxygen, therefore be widely used using photoplethysmographic signal extraction heart rate and blood oxygen.Light
Power Capacity pulse wave (PPG) refers to obtaining volume Organ size by optical component.Pulse oximetry is usually used, people is detected
The change of the optical absorption property of class skin.Typically, transmission or reflection blood PPG sensors are surveyed by the absorption of certain wave strong point
It measures to monitor perfusion of corium from the blood to skin and subcutaneous tissue.There are circuit structures to answer for traditional pulse wave detecting system
Miscellaneous, the problems such as power consumption is higher.Meanwhile photoplethysmographic signal is highly prone to the influence of motion artifacts, seriously affects heart rate
With the accuracy of blood oxygen saturation detection traditional algorithm is utilized especially when in photoplethysmographic comprising mutation waveform
Obtained result is unsatisfactory.
Utility model content
The technical problem to be solved by the present invention is to be directed to pulse wave detecting system in the prior art, there are circuit knots
Structure complexity, the higher defect of power consumption, provide a kind of embedded human physiologic information non-invasive detection system.
Technical solution adopted by the utility model to solve its technical problems is：
The utility model provides a kind of embedded human physiologic information non-invasive detection system, including detector shell and sets
Set the detection circuit board and detect tank in detector enclosure interior；Wherein：
The both sides of detect tank are provided with infrared diode array, and the bottom of detect tank is provided with sloping platform, is arranged above sloping platform
There is inclination optical filter, and the upper surface for tilting optical filter and sloping platform is mutually parallel；It tilts to be arranged between optical filter and sloping platform and have time
Chamber is provided with image capture module and photoelectricity volume pulse detection circuit in the cavity；Detect tank tilts bottom with optical filter is tilted
The link position in portion is provided with finger tip chamber, and finger tip chamber is internally provided with finger switch；
Detection circuit board includes the controller and data-interface being connected with controller, storage circuit and power circuit,
Infrared diode array, image capture module, photoelectricity volume pulse detection circuit and finger switch are connected with controller；
Photoelectricity volume pulse detection circuit includes multi-wavelength LED array, driving circuit, photodetector and signal processing electricity
Road, multi-wavelength LED array are connected by driving circuit with controller, and photodetector passes through signal processing circuit and controller phase
Even.
Further, it is provided with sliding rail at the top of the detector shell of the utility model, slip lid is provided with above detect tank,
Slip lid is slidably connected with slip lid.
Further, the image capture module of the utility model uses CCD camera or COMS cameras, Image Acquisition mould
It is connected by spi bus between block and controller；Infrared diode array uses near-infrared formula infrared diode, infrared diode
Array is driven using PWM mode；Connected by spi bus between driving circuit and controller in photoelectricity volume pulse detection circuit
It connects；Storage circuit uses SD storage circuits；The supply voltage of potential circuit is+5V；Finger switch uses microswitch.
Further, the multi-wavelength LED array of the utility model includes 8 groups of LED, 8 groups of rounded arrangements of LED, 8 groups of LED
Respectively the first LED, the 2nd LED, the 3rd LED, the 4th LED, the 5th LED, the 6th LED, the 7th LED and the 8th LED；Wherein,
First LED selects 610nm wave bands, the 2nd LED that 630nm wave bands, the 3rd LED is selected to select 660nm wave bands, the 4th LED selections
690nm wave bands, the 5th LED selection 750nm wave bands, the 6th LED selection 805nm wave bands, the 7th LED selection 850nm wave bands, the 8th
LED selects 940nm wave bands；
8 groups of LED are divided into 4 pairs：The anode and cathode of first LED and the 2nd LED is docked, by the first LED's and the 2nd LED
Two pin connection driving circuits are drawn at two docking of anode and cathode respectively；The anode and cathode of 3rd LED and the 4th LED is docked,
Two pins are drawn respectively by two docking of the anode and cathode of the 3rd LED and the 4th LED connects driving circuit；5th LED and
The anode and cathode of 6th LED is docked, and drawing two pins respectively by two docking of the anode and cathode of the 5th LED and the 6th LED connects
Connect driving circuit；The anode and cathode of 7th LED and the 8th LED is docked, by two docking of the anode and cathode of the 7th LED and the 8th LED
Two pins are drawn respectively and connect driving circuit in place；
Photodetector is arranged in the center of 8 groups of LED, and 8 groups of LED are evenly distributed on the surrounding of photodetector.
Further, the driving circuit of the utility model includes multicircuit switch and light source driving circuit, controller according to
It is secondary to be connected with multi-wavelength LED array by light source driving circuit and multicircuit switch；
Light source driving circuit uses H bridge type circuit, multicircuit switch sample differential connection type, per a pair of in 4 couples of LED
Two pins respectively with differential channel connections pairs of in differential type multicircuit switch.
Further, the signal processing circuit of the utility model include amplifying circuit, multiplexer, low cylinder filter and
Analog-digital converter, photodetector pass sequentially through after amplifying circuit, multiplexer, low cylinder filter and analog-digital converter with control
Device processed is connected；Amplifying circuit uses transimpedance amplifying circuit, multiplexer to use multidiameter option switch.
Further, the detection circuit board of the utility model further includes Bluetooth circuit, and Bluetooth circuit includes that ultra low voltage is micro-
Power consumption MCU, 4.0 chip of bluetooth and transmitting antenna based on LSB, MCU are connected electrically between 4.0 chip of controller and bluetooth, hair
Antenna is penetrated with 4.0 chip of bluetooth to be connected；
The running parameter that 4.0 chip of bluetooth is arranged is：Transmission power is debugged between -20dBm to+10dBm using GFSK
Mode, modulation index is between 0.45-0.55, and frequency hopping work, 1Mbps transmission rates, it is the channel of 2M to have 40 channel widths,
Tranmitting frequency is 2.4GHz；The minimum operating voltages of ultra low voltage micro energy lose MCU are 1.8V, dormancy power consumption 2nA；Transmitting antenna is
PCB antenna.
The utility model generate advantageous effect be：The embedded human physiologic information Non-invasive detection system of the utility model
System, simple in structure, easy to use, dust-proof anti-gray based on photoplethysmographic and refers to vein detection technique, can continuously, nothing
Wound monitors human heart rate, blood oxygen, the multiphases human body information such as hemoglobin concentration in real time, at the same can be easily and fast acquisition
User's vein image, automatic identification, matching user identity, realizes efficient, accurate Non-invasive detection, is widely used in hospital's body
Detection limit.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing：
Fig. 1 is that the utility model embedded human physiologic information non-invasive detection system closes lid state diagram；
Fig. 2 is the uncapped state figure of the utility model embedded human physiologic information non-invasive detection system；
Fig. 3 is the structural schematic diagram of the utility model embedded human physiologic information non-invasive detection system；
Fig. 4 is the detecting state schematic diagram of the utility model embedded human physiologic information non-invasive detection system；
Fig. 5 is the module electrical connection schematic diagram of the utility model embedded human physiologic information non-invasive detection system；
Fig. 6 is the device model connection diagram of the utility model embedded human physiologic information non-invasive detection system；
Fig. 7 is the multi-wavelength LED array connection signal of the utility model embedded human physiologic information non-invasive detection system
Figure；
Fig. 8 is the eight wavelength LED array layout signal of the utility model embedded human physiologic information non-invasive detection system
Figure；
Fig. 9 is the four wavelength LED array layout signal of the utility model embedded human physiologic information non-invasive detection system
Figure；
Figure 10 is the drive circuit module connection signal of the utility model embedded human physiologic information non-invasive detection system
Figure；
Figure 11 is the driving circuit device model connection of the utility model embedded human physiologic information non-invasive detection system
Schematic diagram；
Figure 12 is the signal processing circuit connection signal of the utility model embedded human physiologic information non-invasive detection system
Figure；
Figure 13 is the signal processing circuit device model of the utility model embedded human physiologic information non-invasive detection system
Connection diagram；
In figure：1- detector shells, 2- slip lids, 3- sliding rails, 4- cavitys, 5- inclination optical filters, 6- infrared diode arrays,
7- image capture modules, 8- photoelectricity volume pulse detection circuits, 81- multi-wavelength LED arrays, 82- photodetectors, 9- finger tips
Chamber, 10- finger switches.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only explaining this
Utility model is not used to limit the utility model.
As shown in Figure 1, the embedded human physiologic information non-invasive detection system of the utility model embodiment, including detector
Shell 1 and the detection circuit board and detect tank being arranged inside detector shell 1；Wherein：
The both sides of detect tank are provided with infrared diode array 6, and the bottom of detect tank is provided with sloping platform, is arranged above sloping platform
Have and tilt optical filter 5, and inclination optical filter 5 and the upper surface of sloping platform are mutually parallel；It tilts and is provided between optical filter 5 and sloping platform
Cavity 4 is provided with image capture module 7 and photoelectricity volume pulse detection circuit 8 in the cavity 4；Detect tank and inclination optical filter 5
The link position of tilting bottom is provided with finger tip chamber 9, and finger tip chamber 9 is internally provided with finger switch 10；
Detection circuit board includes the controller and data-interface being connected with controller, storage circuit and power circuit,
Infrared diode array 6, image capture module 7, photoelectricity volume pulse detection circuit 8 and finger switch 10 with controller phase
Even；
Photoelectricity volume pulse detection circuit 8 includes multi-wavelength LED array 81, driving circuit, photodetector 82 and signal
Processing circuit, multi-wavelength LED array 81 are connected by driving circuit with controller, and photodetector 82 passes through signal processing circuit
It is connected with controller.
The top of detector shell 1 is provided with sliding rail 3, and slip lid 2 is provided with above detect tank, and slip lid 2 connects with the sliding of slip lid 3
It connects.
Image capture module 7 uses CCD camera or COMS cameras, passes through between image capture module 7 and controller
Spi bus connects；Infrared diode array 6 uses near-infrared formula infrared diode, infrared diode array 6 to use PWM mode
Driving；It is connected by spi bus between driving circuit and controller in photoelectricity volume pulse detection circuit 8；Storage circuit is adopted
With SD storage circuits；The supply voltage of potential circuit is+5V；Finger switch uses microswitch.
Multi-wavelength LED array 81 includes 8 groups of LED, and 8 groups of rounded arrangements of LED, 8 groups of LED are respectively the first LED, second
LED, the 3rd LED, the 4th LED, the 5th LED, the 6th LED, the 7th LED and the 8th LED；Wherein, the first LED selects 610nm waves
Section, the 2nd LED select 630nm wave bands, the 3rd LED that 660nm wave bands, the 4th LED is selected to select 690nm wave bands, the 5th LED selections
750nm wave bands, the 6th LED select 805nm wave bands, the 7th LED that 850nm wave bands, the 8th LED is selected to select 940nm wave bands；
8 groups of LED are divided into 4 pairs：The anode and cathode of first LED and the 2nd LED is docked, by the first LED's and the 2nd LED
Two pin connection driving circuits are drawn at two docking of anode and cathode respectively；The anode and cathode of 3rd LED and the 4th LED is docked,
Two pins are drawn respectively by two docking of the anode and cathode of the 3rd LED and the 4th LED connects driving circuit；5th LED and
The anode and cathode of 6th LED is docked, and drawing two pins respectively by two docking of the anode and cathode of the 5th LED and the 6th LED connects
Connect driving circuit；The anode and cathode of 7th LED and the 8th LED is docked, by two docking of the anode and cathode of the 7th LED and the 8th LED
Two pins are drawn respectively and connect driving circuit in place；
Photodetector 82 is arranged in the center of 8 groups of LED, and 8 groups of LED are evenly distributed on the four of photodetector 82
Week.
Driving circuit includes multicircuit switch and light source driving circuit, and controller passes sequentially through light source driving circuit and more
Road change-over switch is connected with multi-wavelength LED array 81；
Light source driving circuit uses H bridge type circuit, multicircuit switch sample differential connection type, per a pair of in 4 couples of LED
Two pins respectively with differential channel connections pairs of in differential type multicircuit switch.
Signal processing circuit includes amplifying circuit, multiplexer, low cylinder filter and analog-digital converter, photodetector
82 pass sequentially through amplifying circuit, multiplexer, low cylinder filter and analog-digital converter after be connected with controller；Amplifying circuit is adopted
With transimpedance amplifying circuit, multiplexer uses multidiameter option switch.
Detection circuit board further includes Bluetooth circuit, and Bluetooth circuit includes ultra low voltage micro energy lose MCU, the bluetooth based on LSB
4.0 chips and transmitting antenna, MCU are connected electrically between 4.0 chip of controller and bluetooth, transmitting antenna and 4.0 chip phase of bluetooth
Even；
The running parameter that 4.0 chip of bluetooth is arranged is：Transmission power is debugged between -20dBm to+10dBm using GFSK
Mode, modulation index is between 0.45-0.55, and frequency hopping work, 1Mbps transmission rates, it is the channel of 2M to have 40 channel widths,
Tranmitting frequency is 2.4GHz；The minimum operating voltages of ultra low voltage micro energy lose MCU are 1.8V, dormancy power consumption 2nA；Transmitting antenna is
PCB antenna.
Specifically, the utility model also provides following embodiment：
Embodiment one
As shown in Figure 1, 2, a kind of embedded human physiologic information non-invasive detection system, including detector shell and setting
A side surface of the detection circuit board of the detector enclosure interior, the detector shell is provided with slip lid, the slip lid
It is connect by sliding rail between shell, detect tank is provided with below the slip lid；
As shown in Figure 3,4, the both sides of the detect tank are provided with infrared diode array, the bottom setting of the detect tank
There is sloping platform, the inclination optical filter parallel with the sloping platform, shape between the optical filter and sloping platform are provided on the upside of the sloping platform
At cavity in be provided with image capture module and photoplethysmographic detection circuit, the detect tank and tilt optical filter phase
Adjacent inside is provided with finger tip chamber, and the finger tip chamber is internally provided with finger switch；
As shown in figure 5, the detection circuit board include controller and the data-interface being separately connected with the controller,
Storage circuit and power circuit, the infrared diode array, image capture module, photoplethysmographic detection circuit and hand
Refer to switch and is separately connected the controller；
The photoplethysmographic detection circuit includes multi-wavelength LED array, driving circuit, photodetector and signal
Processing circuit, the multi-wavelength LED array connect the controller by driving circuit, the photodetector by signal at
It manages circuit and connects the controller.
As shown in fig. 6, the controller selects STM32 controllers, described image acquisition module using CCD camera or
COMS cameras and with the STM32 controllers use SPI communication, the infrared diode array use infrared two pole of near-infrared
Pipe display is driven using PWM mode, and the multi-wavelength LED array uses ELM-4000 arrays, the driving circuit to use
AFE4400 chip circuits and with STM32 controllers use SPI communication, the photodetector use EPM-4001 receivers, institute
Signal processing circuit is stated to select AFE4400 chip circuits and use SPI communication, the storage circuit to select with STM32 controllers
SD storage circuits, the power circuit select LP2989 chip circuits to connect+5V power supplys, and the finger switch selects microswitch.
Specifically, low noise linear voltage adjusts chip LP2989 connects 5V batteries by a toggle switch, then produce
The output of raw 3.3V.The power supply of 3.3V is exported so that front-end chip, STM32 and each Peripheral Interface use are in each analog power
Between digital power, there is inductance to do buffer action.In order to facilitate use with debugging, by interface layout PCB outer side edges
Edge is followed successively by sensor DB7 interfaces and Mini-USB interfaces from the upper left corner counterclockwise.
Specifically, SD card seat uses eject SD card pedestal, using SD_sd model chips.
Embodiment one uses four road luminous tubes：Feux rouges, infrared light, green light, yellow light.Wherein emission element is by AFE4400
Driving emits four road light waves in the sequential in period to tissue, and receiving part is responsible for receiving to be reflected from tissue
Light, the optical signal received is then converted into current signal.
It should be noted that system uses two pieces of AFE4400 chips to realize the acquisition of 4 road PPG signals.Two electricity
Road is identical, simplifies circuit design.AFE4400 crystal oscillators design the crystal resonator for using one piece of 8M rate, model
SMD3225 coordinates the capacitance of 2 pieces of 18pF, and sequential input is provided for front-end chip.1 I/O is shared between AFE4400 and STM32
Mouth is connected, wherein comprising 1 road AFE clock signals output, 1 road AFE reset signals input, 1 tunnel AD conversion finishes signal and exports, and 1
Road SPI digital interfaces, the output of 1 tunnel power down caution signal, the output of 1 paths of LEDs caution signal, 1 tunnel diagnose end signal output and 1
Road off signal input.Wherein reset signal ensures not reset when no signal using pull-up.Abundant interface ensure that system
It can use to maximum amusing degree the various functions of AFE4400, it is ensured that slave computer software can be accurately read AFE4400's
Data, and various mistakes can be handled.This system uses general DB5 interface reflection formula photoelectricity acquisition front end, uses DB5
4 lines in 5 line of interface are respectively as feux rouges, the input of infrared light, output.In order to protect circuit, this 4 tunnel is provided with high-speed switch
Diode, model BAV99W-7-F.And the resistance in 0 Europe of all having connected, facilitates test.
Embodiment two
As shown in Figure 1, 2, a kind of embedded human physiologic information non-invasive detection system, including detector shell and setting
A side surface of the detection circuit board of the detector enclosure interior, the detector shell is provided with slip lid, the slip lid
It is connect by sliding rail between shell, detect tank is provided with below the slip lid；
As shown in Figure 3,4, the both sides of the detect tank are provided with infrared diode array, the bottom setting of the detect tank
There is sloping platform, the inclination optical filter parallel with the sloping platform, shape between the optical filter and sloping platform are provided on the upside of the sloping platform
At cavity in be provided with image capture module and photoplethysmographic detection circuit, the detect tank and tilt optical filter phase
Adjacent inside is provided with finger tip chamber, and the finger tip chamber is internally provided with finger switch；
As shown in figure 5, the detection circuit board include controller and the data-interface being separately connected with the controller,
Storage circuit and power circuit, the infrared diode array, image capture module, photoplethysmographic detection circuit and hand
Refer to switch and is separately connected the controller；
The photoplethysmographic detection circuit includes multi-wavelength LED array, driving circuit, photodetector and signal
Processing circuit, the multi-wavelength LED array connect the controller by driving circuit, the photodetector by signal at
It manages circuit and connects the controller.
It is further as shown in fig. 7, the multi-wavelength LED array includes 8 groups of LED, 8 groups of LED are respectively the first LED, the
Two LED, the 3rd LED, the 4th LED, the 5th LED, the 6th LED, the 7th LED and the 8th LED, the first LED select 610nm waves
Section, the 2nd LED selection 630nm wave bands, the 3rd LED selection 660nm wave bands, the 4th LED selection 690nm wave bands, the 5th LED selections
750nm wave bands, the 6th LED selection 805nm wave bands, the 7th LED selection 850nm wave bands and the 8th LED select 940nm wave bands；
The anode and cathode of first LED and the 2nd LED is docked, and is drawn for two respectively by the anode and cathode of the first LED and the 2nd LED
Foot connects driving circuit；The anode and cathode of 3rd LED and the 4th LED is docked, by the anode and cathode point of the 3rd LED and the 4th LED
Other two pins connect driving circuit；The anode and cathode of 5th LED and the 6th LED is docked, by the 5th LED's and the 6th LED
Anode and cathode distinguishes two pins and connects driving circuit；The anode and cathode of 7th LED and the 8th LED is docked, by the 7th LED and the
The anode and cathode of eight LED distinguishes two pins and connects driving circuit；
As shown in figure 8, the photodetector includes OPT101 chips, the OPT101 chips are arranged in photoelectricity volume arteries and veins
The center for wave detection circuit of fighting, 8 groups of LED are evenly distributed on the surrounding of the OPT101 chips.
It should be noted that detecting system can also use 4 road wavelength LED transmitting terminals according to actual conditions as shown in Figure 9,
Empirical mode decomposition may be used in system and cubic spline interpolation algorithm removes high-frequency noise and the baseline drift of original pulse wave,
Simultaneously with the fundametal compoment of dynamic spectrum Frequency domain extracting method extraction logarithm pulse wave, and use Partial Least Squares cross validation
Method, complete the prediction of human blood glucose concentration.
As shown in Figure 10,11, the driving circuit includes multicircuit switch and light source driving circuit, the controller according to
It is secondary that multi-wavelength LED array is connected by light source driving circuit, multicircuit switch；The light source driving circuit is using H bridge type electricity
Road, the difference multidiameter option switch use ADI companies ADG709 chip circuits, are coupled with per two pins of a pair of LED
On the pin of pairs of differential path, the H bridge type driving circuit in such a way that difference multidiameter option switch is combined to 8
Road light source is controlled.
Specifically, ADG709 chips can bear 30mA be continuously turned on electric current, disclosure satisfy that the driving current of each LED is wanted
It asks, is coupled on the pin of pairs of differential path per two pins of a pair of LED.
When the multidiameter option switch selector channels 1 ADG709, i.e. S1A and S1B is gated：(1) when P5.6 is low level, P5.7
For high level when, Q1 conductings, Q2 cut-offs, LED1 lights, and electric current reaches ground, number by VCC by Q1 → LED1 → Q4 → R7 at this time
The brightness that the voltage that mode converter DAC2 is generated is applied on Q4 to LED1 controls；(2) when P5.6 is high level, P5.7 is
When low level, Q1 cut-offs, Q2 is connected, and LED2 is lighted, and electric current reaches ground, digital-to-analogue by VCC by Q2 → LED2 → Q3 → R6 at this time
The brightness that the voltage that converter DAC1 is generated is applied on Q3 to LED2 controls.The size of light source drive current is according to detection
To photosignal intensity be adjusted.Equally, when multidiameter option switch ADG709 selects other channels, other LED light sources
It is controlled.The channel of multidiameter option switch is selected by controlling EN, A0, A1 pin level, when reaching to light source luminescent
The control of sequence, wherein EN are enabled pin, and A0 and A1 is channel selecting pin.
As shown in Figure 12,13, the signal processing circuit includes amplifying circuit, multiplexer, low cylinder filter and mould
Number converter, the photodetector pass sequentially through amplifying circuit, multiplexer, low cylinder filter and are connected with analog-digital converter
The controller；The amplifying circuit uses the transimpedance amplifying circuit of OPT101 chip interiors, the multiplexer to select
Multidiameter option switch ADG706, the analog-digital converter select AD7173 chips.
Since the saltus step ingredient AC of PPG signals only accounts for 0.1%~10% or so of signal, the overwhelming majority is the DC of non-toggle
Ingredient.If being amplified simultaneously to AC and DC, it is possible to cause PPG signals to reach and be saturated and the still insufficient feelings of AC ingredients
Condition, it is therefore desirable to which individual enhanced processing is carried out to AC ingredients.Transimpedance amplifying circuit inside OPT101 is by photodiode
The optical signal amplifying great achievement voltage signal detected is exported from 5 pins, this level-one amplified signal be total PPG signals (comprising AC with
DC ingredients).MCU is acquired first order amplified signal by ADC, is on the one hand realized according to the power of first order amplified signal
On the other hand control to light source luminescent intensity carries out processing to first order amplified signal and extracts DC ingredients.This DC ingredient adds
The normal phase input end of U2 is input to after a upper slight bias, and the negative input of U2 terminates the output (AC+DC) of U1, it is poor by U2
The amplification for dividing enlarging function to realize AC ingredients.
AD7173 is a 24, low-power consumption, 16 channels AD conversion chip, effectively in the case where sample rate is 31.25kSPS
Position is 17.5, disclosure satisfy that the design requirement.The selection in the channels multidiameter option switch ADG706 should be with light source it is luminous when
Sequence matches：When LED1 shines, channel 1 gates, and when LED1 goes out, channel 2 gates, and when LED2 shines, channel 3 gates,
When LED2 goes out, channel 4 gates, and so on.This guarantees the signals that each ADC channel individually acquires respective sources, keep away
The cross-interference issue between channel is exempted from.Specifically, MCU uses TI companies MSP430F5529 chips.The chip dominant frequency is reachable
25MHz has the moneys such as 10KB RAM, 128KBFlash, 4 SPI peripheral hardwares, 2 I2C peripheral hardwares, 12 ADC, I/O port, USB peripherals
Source.
The detection circuit board further includes Bluetooth circuit, and the Bluetooth circuit includes ultra low voltage micro energy lose MCU, is based on
4.0 chip of LSB bluetooths and transmitting antenna, the MCU are connected electrically between 4.0 chip of the controller and bluetooth, the transmitting
Antenna connects 4.0 chip of bluetooth.
Specifically, 4.0 chip emission power of bluetooth between -20dBm to+10dBm, using GFSK debud modes, is modulated
Index is between 0.45-0.55, and frequency hopping work, 1Mbps transmission rates, it is the channel of 2M, tranmitting frequency to have 40 channel widths
For 2.4GHz；The minimum operating voltages of ultra low voltage micro energy lose MCU are up to 1.8V, dormancy power consumption 2nA；The transmitting
Antenna is PCB antenna.
The utility model belongs to photoelectric testing sensor technical field, the non-invasive detection system include detector shell and
The detection circuit board of enclosure interior, a side surface of shell are provided with slip lid, are provided with detect tank below slip lid, inside detect tank
It is provided with infrared diode array, sloping platform and tilts optical filter, image is provided in the cavity formed between optical filter and sloping platform
Acquisition module and photoplethysmographic detection circuit, the detect tank inside adjacent with optical filter is tilted are provided with finger tip chamber and hand
Refer to switch.The utility model is easy to use, dust-proof anti-gray, based on photoplethysmographic and refers to vein detection technique, Ke Yilian
It is continuous, noninvasive, monitor human heart rate, blood oxygen, the multiphases human body information such as hemoglobin concentration in real time, while can be easily and fast
Acquisition user's vein image, automatic identification, matching user identity, realize efficient, accurate Non-invasive detection, be widely used in
Hospital Physical Examination measures.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of the appended claims for the utility model.
Claims (7)
1. a kind of embedded human physiologic information non-invasive detection system, which is characterized in that including detector shell (1) and setting
In detector shell (1) internal detection circuit board and detect tank；Wherein：
The both sides of detect tank are provided with infrared diode array (6), and the bottom of detect tank is provided with sloping platform, is provided with above sloping platform
Optical filter (5) is tilted, and the upper surface of inclination optical filter (5) and sloping platform is mutually parallel；Optical filter (5) is tilted to set between sloping platform
It is equipped with cavity (4), image capture module (7) and photoelectricity volume pulse detection circuit (8) are provided in the cavity (4)；Detect tank
The link position for tilting optical filter (5) tilting bottom is provided with finger tip chamber (9), finger tip chamber (9) is internally provided with finger switch
(10)；
Detection circuit board includes the controller and data-interface being connected with controller, storage circuit and power circuit, infrared
Diode array (6), image capture module (7), photoelectricity volume pulse detection circuit (8) and finger switch (10) are and controller
It is connected；
Photoelectricity volume pulse detection circuit (8) includes multi-wavelength LED array (81), driving circuit, photodetector (82) and letter
Number processing circuit, multi-wavelength LED array (81) are connected by driving circuit with controller, photodetector (82) by signal at
Reason circuit is connected with controller.
2. embedded human physiologic information non-invasive detection system according to claim 1, which is characterized in that detector shell
(1) it is provided with sliding rail (3) at the top of, is provided with slip lid (2) above detect tank, slip lid (2) is slidably connected with sliding rail (3).
3. embedded human physiologic information non-invasive detection system according to claim 1, which is characterized in that Image Acquisition mould
Block (7) uses CCD camera or COMS cameras, image capture module (7) to be connect by spi bus between controller；It is red
Outer diode array (6) uses near-infrared formula infrared diode, infrared diode array (6) to be driven using PWM mode；Photocapacitance
It is connected by spi bus between driving circuit and controller in product pulse detection circuit (8)；Storage circuit is using SD storage electricity
Road；The supply voltage of potential circuit is+5V；Finger switch uses microswitch.
4. embedded human physiologic information non-invasive detection system according to claim 1, which is characterized in that multi-wavelength LED
Array (81) includes 8 groups of LED, and 8 groups of rounded arrangements of LED, 8 groups of LED are respectively the first LED, the 2nd LED, the 3rd LED, the 4th
LED, the 5th LED, the 6th LED, the 7th LED and the 8th LED；Wherein, the first LED selects 610nm wave bands, the 2nd LED selections
630nm wave bands, the 3rd LED selection 660nm wave bands, the 4th LED selection 690nm wave bands, the 5th LED selection 750nm wave bands, the 6th
LED selects 805nm wave bands, the 7th LED that 850nm wave bands, the 8th LED is selected to select 940nm wave bands；
8 groups of LED are divided into 4 pairs：The anode and cathode of first LED and the 2nd LED is docked, by the negative and positive of the first LED and the 2nd LED
Two pin connection driving circuits are drawn at two docking of pole respectively；The anode and cathode of 3rd LED and the 4th LED is docked, by the
Two pin connection driving circuits are drawn at two docking of the anode and cathode of three LED and the 4th LED respectively；5th LED and the 6th
The anode and cathode of LED is docked, and is drawn two pin connections respectively by two docking of the anode and cathode of the 5th LED and the 6th LED and is driven
Dynamic circuit；The anode and cathode of 7th LED and the 8th LED is docked, by two docking punishment of the anode and cathode of the 7th LED and the 8th LED
It Yin Chu not two pins connection driving circuits；
Photodetector (82) is arranged in the center of 8 groups of LED, and 8 groups of LED are evenly distributed on the four of photodetector (82)
Week.
5. embedded human physiologic information non-invasive detection system according to claim 4, which is characterized in that driving circuit packet
Multicircuit switch and light source driving circuit are included, controller passes sequentially through light source driving circuit and multicircuit switch and multi-wavelength
LED array (81) is connected；
Light source driving circuit uses H bridge type circuit, multicircuit switch sample differential connection type, per a pair of two in 4 couples of LED
A pin respectively with differential channel connections pairs of in differential type multicircuit switch.
6. embedded human physiologic information non-invasive detection system according to claim 4, which is characterized in that signal processing electricity
Road includes amplifying circuit, multiplexer, low cylinder filter and analog-digital converter, and photodetector (82) passes sequentially through amplification electricity
It is connected with controller after road, multiplexer, low cylinder filter and analog-digital converter；Amplifying circuit is using transimpedance amplification electricity
Road, multiplexer use multidiameter option switch.
7. embedded human physiologic information non-invasive detection system according to claim 1, which is characterized in that detection circuit board
Further include Bluetooth circuit, Bluetooth circuit includes ultra low voltage micro energy lose MCU, 4.0 chip of bluetooth and transmitting antenna based on LSB,
MCU is connected electrically between 4.0 chip of controller and bluetooth, and transmitting antenna is connected with 4.0 chip of bluetooth；
The running parameter that 4.0 chip of bluetooth is arranged is：Transmission power is between -20dBm to+10dBm, using the debugging sides GFSK
Formula, modulation index is between 0.45-0.55, frequency hopping work, 1Mbps transmission rates, and it is the channel of 2M, hair to have 40 channel widths
Radio frequency rate is 2.4GHz；The minimum operating voltages of ultra low voltage micro energy lose MCU are 1.8V, dormancy power consumption 2nA；Transmitting antenna is
PCB antenna.
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| CN201720562269.8U CN207886208U (en) | 2017-05-19 | 2017-05-19 | A kind of embedded human physiologic information non-invasive detection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112040052A (en) * | 2020-08-12 | 2020-12-04 | 维沃移动通信有限公司 | Detection module and electronic equipment |
| CN113298196A (en) * | 2021-07-28 | 2021-08-24 | 深兰盛视科技（苏州）有限公司 | Health monitoring method, device, equipment and computer readable storage medium |
| CN113545748A (en) * | 2021-06-15 | 2021-10-26 | 中船海洋探测技术研究院有限公司 | Wearable diver vital sign monitoring system based on two bracelets |
-
2017
- 2017-05-19 CN CN201720562269.8U patent/CN207886208U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112040052A (en) * | 2020-08-12 | 2020-12-04 | 维沃移动通信有限公司 | Detection module and electronic equipment |
| CN113545748A (en) * | 2021-06-15 | 2021-10-26 | 中船海洋探测技术研究院有限公司 | Wearable diver vital sign monitoring system based on two bracelets |
| CN113298196A (en) * | 2021-07-28 | 2021-08-24 | 深兰盛视科技（苏州）有限公司 | Health monitoring method, device, equipment and computer readable storage medium |
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