CN107898461A - Portable 24 passage human biological electricity impedance detection device and detection method - Google Patents
Portable 24 passage human biological electricity impedance detection device and detection method Download PDFInfo
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- CN107898461A CN107898461A CN201710984215.5A CN201710984215A CN107898461A CN 107898461 A CN107898461 A CN 107898461A CN 201710984215 A CN201710984215 A CN 201710984215A CN 107898461 A CN107898461 A CN 107898461A
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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
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0536—Impedance imaging, e.g. by tomography
-
- 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
- A61B5/681—Wristwatch-type devices
-
- 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
- A61B5/6843—Monitoring or controlling sensor contact pressure
Abstract
The portable 24 passage human biological electricity impedance detection device of one kind provided by the invention and detection method, device include bracelet, electrode connecting line, measuring pen and intelligent terminal；Bracelet includes fixed electrode, wrist strap and the first magnetic connecting interface；Measuring pen includes shell, scalable measuring electrode, circuit board and the second magnetic connecting interface, and bracelet is connected by the first magnetic connecting interface with the second magnetic connecting interface electrode connecting line；Circuit board includes position sensor, wireless communication chips and power circuit, and integrate A/D sample circuits, wireless communication line and control chip, position sensor and power circuit in wireless communication chips is connected with control chip respectively；Measuring pen is connected by wireless communication chips with intelligent terminal.The structure of the present invention is simple, easy to operate, is easy for the bio-electrical impedance measuring apparatus carried, and suitable personal and family uses, and when detecting human-body biological physical message, the position positioning of test point is simple accurate, and the result uniformity of measurement is high.
Description
Technical field
The present invention relates to bio-electrical impedance detector field, more particularly to portable 24 passage human biological electricity impedance detection
Device and detection method.
Background technology
Bio-electrical impedance measuring (Electrical Bioimpedance Measurement) is that one kind utilizes biological tissue
The extraction of electrical characteristics and its changing rule and Human Physiology, the detection skill of the relevant biophysical information of pathological condition with organ
Art.It is sent into a small measurement electric current generally by the electrode system for being placed in body surface to detection object, detects corresponding electricity
Impedance and its change, then according to different application purposes, obtain relevant physiology and pathological information.It has it is noninvasive, harmless,
Inexpensively, the features such as easy to operate and functional information is abundant, doctor and patient are easy to receive.
Electrical impedance tomography (EIT：Electrical Impedance Tomography), or abbreviation impedance imaging, it is
After form, structure imaging, just developed the medical imaging technology of new generation occurred in nearly 20 years, there is functional imaging, it is lossless
Wound and medical image guard 3 big outstanding advantages.It is a kind of biological information detection preferable, that there is tempting application prospect and imaging
Means.Impedance imaging is using tissue, the distribution of impedance of organ or impedance variations as research object, by being configured at body surface
Electrode system, the electrical characteristics information of extraction tissue relevant with Human Physiology, pathological state or organ, provide reflection tissue,
The feature image result of organ dysfunction state and its changing rule.EIT provides tissue using bio-impedance detection technique
With the faultage image of organ impedance, so being also impedance CT.But EIT is the two kind technologies entirely different with CT.Using x-ray
Obtain the ultrasonic imaging techniques of the CT of human body faultage image with using aggregation acoustic beam etc., there is provided organization of human body image, belongs to second
For imaging technique.This structural images only work as disease, and have formed organic disease, the structure of linked groups and organ
When having changed (as formed a certain size tumour), diagnostic result can be just provided.Medical research shows, when disease occurs
When, the feature change of linked groups and organ often will be prior to organic disease and other clinical symptoms.Passing through necessarily
After functional compensation phase or incubation period, organic disease is developed into, starts tissue and organ structure change or other clinics occur
Symptom.Early stage organic disease, also have quite a few disease without obvious clinical manifestation, again by certain development or
, just there is more obvious dysfunction or clinical symptoms in hysteresis.So that when patient to examination in hospital, diagnosis, lesion is often
Have evolved to middle and advanced stage, delayed treatment time, seriously affect disease treatment and more after.As can in the incubation period of disease
Or the functional compensation phase, i.e., before organizing to occur with organ structure change, or early stage organic disease, detection in time and
Confirm that tissue relevant with disease, the feature of organ change, prompt the generation of disease, its evolution is tracked, for correlation
The generaI investigation of disease, prevention and early diagnosis and treatment will be very favorable.
Therefore, it is the defects of the prior art：Existing EIT equipment is huge, with high costs, complicated, be not suitable for family and
Personal use.
The content of the invention
For above-mentioned technical problem, the present invention provides a kind of portable 24 passage human biological electricity impedance detection device and inspection
Survey method, the structure of device is simple, easy to operate, is easy for the bio-electrical impedance measuring apparatus carried, suitable personal and family
Use, when detecting human-body biological physical message, the position positioning of test point is simple accurate, and the result uniformity of measurement is high.
To solve the above-mentioned problems, the present invention provides following technical scheme：
In a first aspect, the present invention provides a kind of portable 24 passage human biological electricity impedance detection device, including：Bracelet,
Electrode connecting line, measuring pen and intelligent terminal；
The bracelet includes fixed electrode, wrist strap and the first magnetic connecting interface, the fixed electrode and is arranged at the wrist
Inner surface of the band close to wrist side；
The measuring pen include shell, scalable measuring electrode, the circuit board for being located in the shell portion, positioned at described outer
The second magnetic connecting interface on shell surface, when the scalable measuring electrode is in extension state, positioned at the outside of the shell,
When the scalable measuring electrode is in contraction state, portion is located in the shell；
The bracelet is connected by the described first magnetic connecting interface with one end of the electrode connecting line, the measuring pen
It is connected by the described second magnetic connecting interface with the other end of the electrode connecting line；
The circuit board includes position sensor, wireless communication chips and power circuit, collects in the wireless communication chips
Into A/D sample circuits, wireless communication line and control chip, the position sensor and the power circuit respectively with the control
Coremaking piece connects；
The measuring pen is connected by the wireless communication chips with the intelligent terminal.
Portable 24 passage human biological electricity impedance detection device provided by the invention, its technical solution are：Including bracelet,
Electrode connecting line, measuring pen and intelligent terminal；The bracelet includes fixed electrode, wrist strap and the first magnetic connecting interface, described
Fixed electrode is arranged at the wrist strap close to the inner surface of wrist side；The measuring pen includes shell, scalable measuring electrode, position
Circuit board in the enclosure, the second magnetic connecting interface positioned at the case surface, the scalable measuring electrode
During in extension state, positioned at the outside of the shell, when the scalable measuring electrode is in contraction state, positioned at described outer
Inside shell；The bracelet is connected by the described first magnetic connecting interface with one end of the electrode connecting line, the measuring pen
It is connected by the described second magnetic connecting interface with the other end of the electrode connecting line；The circuit board includes position sensing
Device, wireless communication chips and power circuit, A/D sample circuits, wireless communication line and control are integrated in the wireless communication chips
Coremaking piece, the position sensor and the power circuit are connected with the control chip respectively；The measuring pen passes through described
Wireless communication chips are connected with the intelligent terminal.
Portable 24 passage human biological electricity impedance detection device provided by the invention, its is simple in structure, easy to operate, is
Portable bio-electrical impedance measuring apparatus, suitable personal and family uses, when detecting human-body biological physical message, detection
The position positioning of point is simple accurate, and the result uniformity of measurement is high.
Further, the circuit board further includes Signal Regulation and process circuit and measuring loop control circuit, described solid
Fixed electrode and the scalable measuring electrode are connected to the Signal Regulation and processing electricity by the measuring loop control circuit
Lu Shang, the Signal Regulation and process circuit are connected with the A/D sample circuits.
Further, the power circuit includes on-off circuit, wireless communication chips power circuit and signal processing power supply
Circuit, the on-off circuit, wireless communication chips power circuit and signal processing power circuit connect with the control chip respectively
Connect.
Further, the measuring loop control circuit includes four-way variable connector chip, high-precision calibration resistance A,
High-precision calibration resistance B and small DC current source, the four-way variable connector chip are distinguished by the electrode connecting line
It is connected with the fixed electrode and the scalable measuring electrode, the high-precision calibration resistance A and high-precision calibration electricity
Resistance B is connected with the four-way variable connector chip respectively.
Further, the resistance value of the high-precision calibration resistance A is 100k, and the resistance value of the high-precision calibration resistance B is
10M。
Further, the circuit board further includes battery charge control and protection circuit, the battery charge control and guarantor
Protection circuit is connected with the power circuit.
Further, the wireless communication chips are Bluetooth chip, and the Bluetooth chip uses bluetooth 4.0BLE channel radios
Believe agreement.
Further, the material of the wrist strap is elastomeric material.
Further, the electrode connecting line is stretchable formula spiral cable.
Second aspect, the present invention provide a kind of portable 24 passage human-body biological electric impedance detection method, including：
Step S1, the test point of human body is contacted by scalable measuring electrode, obtains trigger signal；
Step S2, according to the trigger signal, carries out digital-to-analogue conversion by A/D sample circuits, obtains digital signal；
Step S3, the digital signal and the parameter of calibration calibration gained set in advance are converted, obtain being surveyed
The bioelectric impedance value of body passageway, and send intelligent terminal to by wireless communication chips.
Based on the prior art, beneficial effects of the present invention are：
1st, measuring device is small, low in energy consumption, easy to operate, and measurement is accurate, and easy to carry, suitable family and individual make
With；
2nd, the positioning of test point is simple and clear, and detection error is small, takes short；
3rd, human body DC impedance is measured, the uniformity of duplicate measurements is high；
4th, human body is detected using microampere order electric current, electric current is small, and the influence to human body is also smaller, can obtain human body
Real impedance value, while time of measuring short (200ms) further reduces disturbing factor, human body is acted on without any discomfort and
Improve measurement accuracy；
The pressing force of test point is detected when the 5th, measuring, applying constant pressure by scalable measurement head acts on
Anthropological measuring point, adds measurement head and the stability of human contact, preferably reduces the mistake during human body impedance measuring
Poor disturbing factor, improves measurement accuracy.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.
Fig. 1 shows a kind of portable 24 passage human biological electricity impedance detection device that the embodiment of the present invention is provided
Schematic diagram during non-measured state；
Fig. 2 shows a kind of portable 24 passage human biological electricity impedance detection device that the embodiment of the present invention is provided
Schematic diagram during measuring state；
Fig. 3 shows a kind of portable 24 passage human biological electricity impedance detection device that the embodiment of the present invention is provided
Fixation measuring electrode structure schematic diagram；
Fig. 4 shows a kind of portable 24 passage human biological electricity impedance detection device that the embodiment of the present invention is provided
Measure the corresponding test point schematic diagram of 20 four-way of human body；
Fig. 5 shows a kind of portable 24 passage human biological electricity impedance detection device that the embodiment of the present invention is provided
Measuring loop electric operation control circuit figure；
Fig. 6 shows a kind of portable 24 passage human biological electricity impedance detection device that the embodiment of the present invention is provided
Signal Regulation and process circuit schematic diagram；
Fig. 7 shows a kind of portable 24 passage human biological electricity impedance detection device that the embodiment of the present invention is provided
Measuring loop control circuit schematic diagram；
Fig. 8 a show a kind of portable 24 passage human biological electricity impedance detection device that the embodiment of the present invention is provided
Scalable measuring electrode detect pen be not detected when view；
Fig. 8 b show a kind of portable 24 passage human biological electricity impedance detection device that the embodiment of the present invention is provided
Scalable measuring electrode detect pen be detected when view；
Fig. 9 shows a kind of portable 24 passage human-body biological electric impedance detection method that the embodiment of the present invention is provided
Flow chart.
Embodiment
The embodiment of technical solution of the present invention is described in detail below in conjunction with attached drawing.Following embodiments are only used for
Clearly illustrate technical scheme, therefore be intended only as example, and the protection of the present invention cannot be limited with this
Scope.
Embodiment one
Referring to Fig. 1, Fig. 2, Fig. 3, in a first aspect, the present invention provides a kind of portable 24 passage human biological electricity impedance detection
Device, including：Bracelet 1, electrode connecting line 2, measuring pen 3 and intelligent terminal 4；
Bracelet 1 includes the magnetic connecting interface 103 of fixed electrode 101, wrist strap 102 and first, and fixed electrode 101 is arranged at wrist
With 102 close to wrist side inner surface；
Measuring pen 3 include shell, scalable measuring electrode 31, the circuit board 32 positioned at enclosure, positioned at case surface
The second magnetic connecting interface 33, when scalable measuring electrode 31 is in extension state, positioned at the outside of shell, scalable measurement
When electrode 31 is in contraction state, positioned at enclosure；
Bracelet 1 is connected by the first magnetic connecting interface 103 with one end of electrode connecting line 2, and measuring pen 3 passes through the second magnetic
Property connecting interface 33 is connected with the other end of electrode connecting line 2；
Wherein, the first magnetic magnetic connecting interface 33 of connecting interface 103 and second is electrically conductive magnetic interfaces, and electrode connects
The connection of line 2 and bracelet 1 and measuring pen 3 can be convenient for collecting and prevents electrode connecting line 2 using the connection of electrically conductive magnetic interfaces
Disengaged automatically with bracelet 1 or measuring pen 3 when drawing force is excessive.
Circuit board 32 includes position sensor 321,322 (not shown) of wireless communication chips and power circuit (in figure
It is not shown), A/D sample circuits 324, wireless communication line 325 and control chip 326, position are integrated in wireless communication chips 322
Sensor 321 and power circuit (not shown) are connected with control chip 326 respectively；
In order to reduce influence of the electric current to human body as possible, size of current is set in a microampere rank.Therefore control chip is passed through
326 controlling power circuit (not shown)s provide the size of electric current, and DC current source is set to fixed electric current.
Wherein, position sensor 321 belongs to magnetic sensor, by sensing the magnetic material in scalable measuring electrode 31
Material, is detected the position of the scalable measuring electrode 31 in measuring pen 3.
Wherein, control chip 326 can be in microcontroller, or the control chip such as microcontroller, FPGA, DSP 326
At least one, the present invention in be not construed as limiting.
Measuring pen 3 is connected by wireless communication chips 322 with intelligent terminal 4.
Referring to Fig. 2, during measurement, bracelet 1 is worn on left hand wrist, the fixation electrode 101 on bracelet 1 and side joint in wrist
Touch, the circuit board 32 in measuring pen 3 is connected by electrode connecting line 2, scalable measuring electrode 31 24 in hookup 4 successively
Test point, you can the bio-electrical impedance information of detection 24 passage of human body.
Preferably, bracelet 1 can be tied up in wrist by the watch buckle on watchband.
Referring to Fig. 5, as the preferred embodiment of the present invention, circuit board 32 further includes Signal Regulation and process circuit 5 and surveys
Loop control circuit 6 is measured, fixed electrode 101 and scalable measuring electrode 31 are connected to signal by measuring loop control circuit 6
In adjusting and process circuit 5, Signal Regulation and process circuit 5 are connected with A/D sample circuits 324.
Signal Regulation and amplifying circuit are connected with A/D sample circuits 324, and control chip 326 is via A/D sample circuits 324
Measuring signal is changed into digital signal, and the calibration factor pair by being obtained by the whole measuring loop of calibration calibration from analog signal
Digital signal is calculated and handled, and obtains accurate human-body biological impedance value.
Wherein, by calibration factor, digital signal is calculated and handled with reference to calibration factor, be specially：
Formula Y=KX+b, wherein, Y is the digital value (digital signal) obtained through AD conversion, and X is resistance value, and access is high-precision
A Y is obtained when spending calibrating resistance A100k, another Y value is obtained when accessing high-precision calibration resistance B10M, solves binary first power
Journey group, it is calibration factor to obtain K values and b values, is, equivalent to Y value is aware of, to have calibration factor can in measurement human testing point
X values are gone out with reverse, obtain impedance value, i.e. human-body biological impedance value.
As the preferred embodiment of the present invention, referring to Fig. 7, measuring loop control circuit 6 includes four-way variable connector core
Piece 601, high-precision calibration resistance A, high-precision calibration resistance B and small DC current source 604, four-way variable connector chip
601 are connected with fixed electrode 101 and scalable measuring electrode 31 respectively by electrode connecting line 2, high-precision calibration resistance A and height
Precision calibrating resistance B is connected with four-way variable connector chip 601 respectively.
Wherein, the resistance value of high-precision calibration resistance A is 100k, and the resistance value of high-precision calibration resistance B is 10M.High-precision school
Quasi- resistance A and high-precision calibration resistance B is used for calibrating the trigger signal that device measures.
In measurement, under the control of the micro-controller by variable connector by human body, scalable measuring electrode 31, constant-current source
604 are linked to be a complete circuit.Measuring loop control can be calibrated and demarcated to device under the control of the micro-controller,
During calibration, by microprocessor control variable connector by high-precision 100k or 10M replace human body access measuring loop, by this two
A high-precision calibrating resistance measurement, obtains the measurement factor, the signal that anthropological measuring obtains is corrected so that the people measured
Body impedance value is more accurate.
Preferably, microcontroller sends order control measurement and calibration multiplexer circuit makes fixed electrode 101, scalable
Measuring electrode 31 and constant-current source (small DC current source 604) form the measuring loop of closing.Constant-current source provides measuring loop
DC current, there is provided measurement electric current it is also smaller in microampere rank, influence of the less electric current to human body.
Referring to Fig. 6, as the preferred embodiment of the present invention, the Signal Regulation and process circuit 5 in apparatus of the present invention are main
Realize the functions such as high impedance input, undistorted amplification, filtering and the matching A/D sampling inputs to human biological electricity impedance signal.
Signal Regulation and process circuit 5 include two high impedance input circuits, are respectively high impedance input circuit 501 and high impedance input
Circuit 502, undistorted amplifying circuit 503, filter circuit 504 and matching circuit of sampling input 505；To reduce human body to signal
Interference, uses differential amplification to the signal of two measuring electrodes, significantly reduces signal interference.Treated body electrical signals are led to
Overmatching level exports suitable voltage and is sampled by A/D sampling modules, and apparatus of the present invention are integrated using microcontroller
12 A/D converter modules carry out AD samplings.
As the preferred embodiment of the present invention, power circuit (not shown) includes on-off circuit (not shown),
Wireless communication chips power circuit (not shown) and signal processing power circuit (not shown), it is on-off circuit, wireless
Communication chip power circuit and signal processing power circuit are connected with control chip 326 respectively.Wherein, foregoing circuit is existing
Circuit in technology realizes that details are not described herein.
Wherein, on-off circuit handles button actions, and button is the measurement button being arranged in measuring pen 3, is used for
Control the switch of measuring pen 3；The button state detected is supplied to microcontroller by on-off circuit.Wireless communication chips power supply electricity
Road, or Bluetooth chip power circuit, is controlled by both on-off circuit and microcontroller, and microcontroller is provided in start
Required suitable power source.Signal processing power circuit provides the suitable power source of measuring circuit, and by microprocessor control, it is enabled, and is
Reduce power consumption, the ability enable signal processing power circuit power supply only in measurement.
As the preferred embodiment of the present invention, the material of fixed electrode 101 and scalable measuring electrode 31 is stainless steel.
Since fixed electrode 101 and scalable measuring electrode 31 are contacted with human body, the material of two electrodes is equal
For conductive material.The present invention is preferably stainless steel material, and inside watchband, outside is exposed, and when measurement connects with human skin
Touch.
Fixed electrode 101 is fixed on human body left hand wrist in measurement by 1 wrist strap 102 of bracelet, and human body is detected
When need not be moved, scalable measuring electrode 31 be provided with compression bullet 327, metal measurement head 328, and with measure and calibration
Multiplexer circuit is connected.
As the preferred embodiment of the present invention, circuit board 32 further includes battery charge control and protection circuit (does not show in figure
Go out), battery charge control and protection circuit are connected with power circuit (not shown).
Apparatus of the present invention are powered using the 150mAh lithium batteries carried, and battery charge control and protection circuit are responsible for
Lithium battery charging and safeguard protection are managed, lithium battery charging is powered using MicroUSB sockets.
As the preferred embodiment of the present invention, wireless communication chips 322 are Bluetooth chip, and Bluetooth chip uses bluetooth
4.0BLE wireless communication protocol.
Measuring pen 3 and the wireless connection of intelligent terminal 4 have used 4.0 low-power consumption of standard bluetooth (BLE) wireless communication protocol,
Due to the use of BLE Signal Transparent Transmission Technologies, 3 power consumption of measuring pen is extremely low, can be used continuously two weeks or so, bluetooth send data include eight into
System, hexadecimal data and ASCII character character.The broadcast message of bluetooth includes the connectivity, device name, main clothes of equipment
The characteristic value UUID of business；This number, equipment string number, the producer's title of facility information display device, these characteristic values are all read-only
Attribute；Main service UUID includes three characteristic values, includes the battery level information of equipment, measurement gained impedance data and command number
According to, battery level information and measurement gained two characteristic values of impedance data be read-only and notification properties, order data characteristic value
Attribute be then reading and writing and notification properties.
When device is started shooting, the partial information first by blue tooth interface toward host computer (intelligent terminal 4) broadcasting equipment is upper
Machine examination is attached after measuring these information with detector, while obtains the facility information of detector, and establishes reliable connection.
The human body impedance data obtained by present apparatus measurement are transmitted by the characteristic value " measurement data " of main service.In host computer
Case database is come with, after being all measured three times, host computer application program is divided obtaining human body impedance data
Analyse and contrasted with database, so as to draw the physical condition of tested person.
Preferably, the enhanced C51 kernels of a 32MHz are carried inside Bluetooth chip, and provide multiple GPIO mouthfuls and
AD sample circuits.So the chip is also used as core controller, substitutes control chip 326, saves system cost and work(
Consumption.The data that bluetooth is sent include octal system, hexadecimal data and ASCII character character.
As the preferred embodiment of the present invention, the material of wrist strap 102 is elastomeric material.
As the preferred embodiment of the present invention, electrode connecting line 2 is stretchable formula spiral cable.
Electrode connecting line 2 is stretchable formula spiral cable, and in non-measured state, due to being connected by magnetism, motor connects
Wiring can be extracted conveniently, and spring wire returns to contraction state, easy to carry.
Referring to Fig. 8 a and Fig. 8 b, as the preferred embodiment of the present invention, the scalable measuring electrode 31 of 3 front end of measuring pen is led
To be made of measurement head 328, spring 327, Hall sensor 321.328 front end of measurement head is made of stainless steel, diameter about 5mm,
This is the contact point with test point, and 328 rear end of measurement head is cylinder-shaped magnetic material.328 front end of measurement head pressing two during measurement
One of 14 test points, pressing stroke about 5mm, pressure about 2.5N.The pressure of measurement head 328 passes through 328 rear portion of measurement head
Spring controls, while metal spring also serves as the part of conductive path and measurement head 328 is connected to the internal circuit of detector
On plate 32.Position sensor 321 is Hall sensor 321, positioned at 3 internal circuit board 32 of measuring pen close to 328 rear end of measurement head
At magnetic material, 32 edge of circuit board is closed on, is convenient to judge by the size of induced field the distance of spring-compressed, so that
To press pressure.
Based on the portable 24 passage human biological electricity impedance detection device of the present invention, intelligent terminal 4 passes through wireless communication
Chip 322 is communicated with microcontroller, controls whole measurement process, and whole measurement procedure is：Bracelet 1 is applied to left finesse,
For the scalable measuring electrode 31 of measuring pen 3 after the test point of a certain passage of human body presses enough positions, microcontroller passes through position
The measurement trigger signal that sensor 321 detects retractable electrode is put, is produced by power circuit (not shown) at signal
The power supply needed for circuit is managed, while controls measurement and calibration multiplexer circuit will fixed electrode 101, scalable measuring electrode
31st, constant-current source 604 (small DC current source 604) and human body form the circuit of a closure, and the impedance signal of generation is through letter
Number adjust and amplifying circuit processing after digital-to-analogue conversion carried out by A/D sample circuits 324, obtained digital signal is in control chip
326 convert with the parameter obtained by calibration calibration, obtain the bioelectric impedance value of surveyed body passageway, then by bluetooth 4.0BLE
Agreement sends host computer (intelligent terminal 4) to, and host computer is again handled impedance data.
The test point of present apparatus measurement shares 24, is distributed in the finger tip of four limbs, wherein left-hand finger six, the right hand
Six, finger, six, left foot toe, six, right crus of diaphragm toe, 24 symmetrical distributions of test point.This 24 detections
Point contacts the joint of horizontal line and vertical line extended line positioned at finger or toenails with finger skin, and when measurement uses scalable survey
The pressing detection point successively of electrode 31 is measured, presses in place and is kept for a period of time carry out one-shot measurement.
Referring to Fig. 9, second aspect, the present invention provides a kind of portable 24 passage human-body biological electric impedance detection method, bag
Include：
Step S1, the test point of human body is contacted by scalable measuring electrode 31, obtains trigger signal；
Step S2, according to trigger signal, carries out digital-to-analogue conversion by A/D sample circuits 324, obtains digital signal；
Step S3, digital signal and the parameter of calibration calibration gained set in advance are converted, obtain surveyed human body
The bioelectric impedance value of passage, and send intelligent terminal 4 to by wireless communication chips 322.
Based on above-mentioned technical proposal, beneficial effects of the present invention are：
1st, measuring device is small, low in energy consumption, easy to operate, and measurement is accurate, and easy to carry, suitable family and individual make
With；
2nd, the positioning of test point is simple and clear, and detection error is small, takes short；
3rd, human body DC impedance is measured, the uniformity of duplicate measurements is high；
4th, human body is detected using microampere order electric current, electric current is small, and the influence to human body is also smaller, can obtain human body
Real impedance value, while time of measuring short (200ms) further reduces disturbing factor, human body is acted on without any discomfort and
Improve measurement accuracy；
The pressing force of test point is detected when the 5th, measuring, applying constant pressure by scalable measurement head 328 makees
For anthropological measuring point, measurement head 328 and the stability of human contact are added, preferably reduces human body impedance measuring process
In error interference factor, improve measurement accuracy.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution described in foregoing embodiments, either to which part or all technical characteristic into
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme, it should all cover among the claim of the present invention and the scope of specification.
Claims (10)
1. portable 24 passage human biological electricity impedance detection device, it is characterised in that including：Bracelet, electrode connecting line, measurement
Pen and intelligent terminal；
The bracelet includes fixed electrode, wrist strap and the first magnetic connecting interface, and the fixed electrode is arranged at the wrist strap patch
The inner surface of nearly wrist side；
The measuring pen include shell, scalable measuring electrode, the circuit board for being located in the shell portion, positioned at the shell table
The magnetic connecting interface of the second of face, it is described positioned at the outside of the shell when the scalable measuring electrode is in extension state
When scalable measuring electrode is in contraction state, portion is located in the shell；
The bracelet is connected by the described first magnetic connecting interface with one end of the electrode connecting line, and the measuring pen passes through
Described second magnetic connecting interface is connected with the other end of the electrode connecting line；
The circuit board includes position sensor, wireless communication chips and power circuit, and A/D is integrated in the wireless communication chips
Sample circuit, wireless communication line and control chip, the position sensor and the power circuit respectively with the control core
Piece connects；
The measuring pen is connected by the wireless communication chips with the intelligent terminal.
2. portable 24 passage human biological electricity impedance detection device according to claim 1, it is characterised in that
The circuit board further includes Signal Regulation and process circuit and measuring loop control circuit, the fixed electrode and it is described can
Flexible measuring electrode is connected on the Signal Regulation and process circuit by the measuring loop control circuit, the signal tune
Section and process circuit are connected with the A/D sample circuits.
3. portable 24 passage human biological electricity impedance detection device according to claim 1, it is characterised in that
The power circuit includes on-off circuit, wireless communication chips power circuit and signal processing power circuit, the switch
Circuit, wireless communication chips power circuit and signal processing power circuit are connected with the control chip respectively.
4. portable 24 passage human biological electricity impedance detection device according to claim 2, it is characterised in that
The measuring loop control circuit includes four-way variable connector chip, high-precision calibration resistance A, high-precision calibration resistance
B and small DC current source, the four-way variable connector chip by the electrode connecting line respectively with the fixed electrode
Connected with the scalable measuring electrode, the high-precision calibration resistance A and the high-precision calibration resistance B are respectively with described four
Passage variable connector chip connects.
5. portable 24 passage human biological electricity impedance detection device according to claim 4, it is characterised in that
The resistance value of the high-precision calibration resistance A is 100k, and the resistance value of the high-precision calibration resistance B is 10M.
6. portable 24 passage human biological electricity impedance detection device according to claim 1, it is characterised in that
The circuit board further includes battery charge control and protection circuit, the battery charge control and protection circuit and the electricity
Source circuit connects.
7. portable 24 passage human biological electricity impedance detection device according to claim 1, it is characterised in that
The wireless communication chips are Bluetooth chip, and the Bluetooth chip uses bluetooth 4.0BLE wireless communication protocols.
8. portable 24 passage human biological electricity impedance detection device according to claim 1, it is characterised in that
The material of the wrist strap is elastomeric material.
9. portable 24 passage human biological electricity impedance detection device according to claim 1, it is characterised in that
The electrode connecting line is stretchable formula spiral cable.
10. portable 24 passage human-body biological electric impedance detection method, it is characterised in that including：
Step S1, the test point of human body is contacted by scalable measuring electrode, obtains trigger signal；
Step S2, according to the trigger signal, carries out digital-to-analogue conversion by A/D sample circuits, obtains digital signal；
Step S3, the digital signal and the parameter of calibration calibration gained set in advance are converted, obtain surveyed human body
The bioelectric impedance value of passage, and send intelligent terminal to by wireless communication chips.
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