CN106510715A - Fabric sensor design method and fabric respiration measuring device - Google Patents

Fabric sensor design method and fabric respiration measuring device Download PDF

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Publication number
CN106510715A
CN106510715A CN201610963881.6A CN201610963881A CN106510715A CN 106510715 A CN106510715 A CN 106510715A CN 201610963881 A CN201610963881 A CN 201610963881A CN 106510715 A CN106510715 A CN 106510715A
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China
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silver
amp
plated conductive
conductive yarn
plated
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CN201610963881.6A
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Chinese (zh)
Inventor
李晨明
谌玉红
刘光达
蔡靖
郭亚飞
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中央军委后勤保障部军需装备研究所
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Priority to CN201610963881.6A priority Critical patent/CN106510715A/en
Publication of CN106510715A publication Critical patent/CN106510715A/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/08Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/0806Detecting, measuring or recording devices for evaluating the respiratory organs by whole-body plethysmography
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/08Detecting, measuring or recording devices for evaluating the respiratory organs
    • A61B5/0816Measuring devices for examining respiratory frequency
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/68Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801Arrangements 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
    • A61B5/6813Specially adapted to be attached to a specific body part
    • A61B5/6823Trunk, e.g., chest, back, abdomen, hip
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/72Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7235Details of waveform analysis

Abstract

The invention relates to a fabric sensor design method and a fabric respiration measuring device. The fabric sensor design method includes the following steps that (1) self-inductance of silver-plated conductive yarns is composed of internal inductance and external inductance; (2) the magnetic field intensity and the magnetic induction intensity of the position which is x away from the axis of the silver-plated conductive yarns are obtained; (3) an area with the width being dx and the length being 1 is obtained in the position which is x away from the axis of the silver-plated conductive yarns, and the magnetic flux and the magnetic flux linkage are obtained; (4) the total magnetic flux linkage of the interior of the silver-plated conductive yarns is obtained; (5) the internal inductance per unit length of the silver-plated conductive yarns is obtained; (6) a point P (x, y) is selected randomly outside the silver-plated conductive yarns, and the magnetic induction intensity of the silver-plated conductive yarns at the point P (x, y); (7) the total magnetic flux linkage of the exterior of the silver-plated conductive yarns is obtained; (8) the external inductance per unit length of the silver-plated conductive yarns is obtained; (9) the inductance per unit length of the silver-plated conductive yarns is obtained; and (10) the fact that the inductance of the silver-plated conductive yarns is related to the position of the silver-plated conductive yarns is known, and then respiration signals and the respiration rate are obtained indirectly. The fabric sensor design method and the fabric respiration measuring device are suitable for monitoring of the respiration signals and the respiration rate in daily life and exercise state.

Description

A kind of fabric sensor method for designing and fabric respiration measurement device

Technical field

The present invention relates to a kind of Sensor Design method and respiration measurement device, survey in human body signal especially with regard to one kind The fabric sensor method for designing based on breathing sensing plethysmography and fabric respiration measurement device used in amount field.

Background technology

In human normal physiological activity, the physiologic information such as breath signal and respiratory rate is reflection cardio-pulmonary function health status Important indicator, respiratory rate to angiocarpy, trachea and bronchus etc. breathe the chronic disease such as class disease and obesity diagnosis with Treatment tool is of great significance.With electronics, the development of the measurement subject such as science and clinical medicine, breath signal measurement The research of method and signal sensor is also gradually increasing in recent years.

Breath signal measuring method mainly has the sides such as piezoelectricity respirometry, thorax impedance method and breathing sensing plethysmography Method.Piezoelectricity respirometry is that the physical size in the thoracic cavity by the use of in respiratory changes the pressure for producing as measurement object, is adopted Realize that breath signal is measured with strain transducer.Thorax impedance method is based in the expansion of respiratory mesothorax cavity volume, contraction process The characteristics of thoracic cavity resistance changes, by high frequency low current AC signal is imported between 2 points of thoracic cavity, with thoracic cavity fixing point Between as region thoracic cavity to be measured resistance, by measuring impedance variations, realize that breath signal is measured.Breathing sensing plethysmography It is that around the wire coil arranged with forms such as sine waves, the wire coil surrounded using thoracic cavity is used as electricity to be measured at thoracic cavity position Sense, is turned to measurement object with the change of inductance value, realizes indirectly respiration measurement.Breathing sensing plethysmography is in actual measurement In, it is to be stretched as breathing produces the rhythm and pace of moving things due to thoracic cavity generation reason Volume Changes in respiratory, coil, thus causes coil Inductance generating period changes, and to the coil inductance connection in series-parallel electric capacity, constitutes resonance circuit;Inductance coil with respiratory, Thoracic cavity changes dilatation, and resonant circuit frequency is changed therewith, by the change for measuring resonant frequency, realizes to breathing letter Number measurement.

In Wearable breath signal, respiratory rate measurement, the certainty of measurement of strain transducer in piezoelectricity respirometry It is in proportion relation with thoracic cavity contact, measures in uncomfortable resultant motion;During the measuring principle of thorax impedance method then needs circuit High frequency small current signal is passed through constantly as exciting signal source, the method has safety to the gauger with cardiovascular and cerebrovascular disease Hidden danger, is not suitable for long-time measurement;And using the inductance of wire coil construction as the breathing sensing plethysmography of measurement carrier The problems such as wearing comfort, measuring coil cannot be solved then standardizing, thus be also not suitable for long-time Wearable breath signal, Respiratory rate is measured.Three of the above method is unsuitable under motion state because of its measuring principle and the intrinsic reason of metering system Breath signal and respiratory rate measurement.

The content of the invention

For the problems referred to above, it is an object of the invention to provide a kind of fabric sensor method for designing and fabric respiration measurement dress Put, the breath signal and respiratory rate monitoring in its suitable daily life and motion state.

For achieving the above object, the present invention takes technical scheme below:A kind of fabric sensor method for designing, its feature exist In the method for designing is comprised the following steps:1) when silver-plated conductive yarn is passed through alternating current, the inside of silver-plated conductive yarn and Alternating flux is produced around which;If 2) magnetic capacity of magnetic circuit be constant, the magnetic linkage ψ and electric current I with silver-plated conductive yarn Linear, self-induction L of silver-plated conductive yarn is:

3) when length is passed through electric current for the silver-plated conductive yarn of l, silver-plated conductive yarn outwardly and inwardly produces magnetic Logical, the self-induction of silver-plated conductive yarn is also by internal inductance LiWith external inductance LeConstitute;4) electric current I is equal along the section of silver-plated conductive yarn Even distribution, according to loop Ampere's law, centered on silver-plated conductive yarn axis, x for radius circumference as path of integration, Then:

In formula,It is the magnetic field intensity at silver-plated conductive yarn axis x;R is the radius of silver-plated conductive yarn;5) To the magnetic field intensity at silver-plated conductive yarn axis xFor:

6) magnetic capacity of silver-plated conductive yarn is μ, then the magnetic induction density B at silver-plated conductive yarn axis xxFor:

7) a width is taken at silver-plated conductive yarn axis x for dx, the area that length is 1, then magnetic flux d φiFor:

8) magnetic flux d φiThe silver-plated conductive yarn number of turn for being interlinked isI.e. corresponding magnetic linkage d ψiFor:

9) the total magnetic linkage inside silver-plated conductive yarn is:

In formula, for the magnetic capacity μ ≈ μ of nonferromagnetic material yarn0;10) the interior electricity of silver-plated conductive yarn unit length Sense LiFor:

11) the external inductance L of silver-plated conductive yarneIt is relevant with magnetic linkage outside silver-plated conductive yarn, from outside silver-plated conductive yarn From the point of view of a bit, the current convergence in silver-plated conductive yarn takes the axis of silver-plated conductive yarn as y on the axis of single Axle, an end points of silver-plated conductive yarn take 1 point of P (x, y) in silver-plated conductive yarn local official, according to Biot-Sa as origin Cut down your law, micro- section of Idy of electric current in infinitely great homogeneous medium1The magnetic induction intensity dB caused by P (x, y) points in its vicinity For:

In formula, d represents this micro- section distance put to P (x, y), i.e.,:d2=x2+(y-y1)2;α represents this apart from radius vector and micro- SectionAngle between direction, i.e.,:

12) when surrounding medium is air, μ=μ0, silver-plated conductive yarn in the magnetic induction intensity that P (x, y) puts is:

13) the total magnetic linkage outside silver-plated conductive yarn is:

In examination, l > > r;

14) external inductance of silver-plated conductive yarn per unit length is:

15) inductance of silver-plated conductive yarn per unit length is:

16) inductance of silver-plated conductive yarn is relevant with the position of silver-plated conductive yarn, when between the silver-plated conductive yarn of change Apart from when, the inductance of silver-plated conductive yarn will be changed therewith, therefore by measuring the change of silver-plated conductive yarn inductance Amount, and then obtain breath signal and respiratory rate.

A kind of fabric respiration measurement device, it is characterised in that it includes fabric sensor, signal tie-in line, resonant inducing electricity Road, lead-out wire and signal conditioning circuit;Described fabric sensor one end is connected with the signal tie-in line, the signal tie-in line The other end is connected with the resonant inducing circuit, and the fabric sensor other end is connected with described lead-out wire one end, described to draw The outlet other end is connected with the resonant inducing circuit and the signal conditioning circuit respectively.

Preferably, the fabric sensor is made up of elastic substrate, adhesion button and silver-plated conductive yarn;The elastic substrate Two ends be each provided with two adhesion buttons, the silver-plated conductive yarn is arranged in the elastic substrate, described silver-plated to lead Electric yarn one end is connected with described signal tie-in line one end, and the silver-plated conductive yarn other end is connected with described lead-out wire one end Connect.

Preferably, the elastic substrate is made up of elastomeric material, and the elastic substrate is 120cm*6cm*2m.

Preferably, the silver-plated conductive yarn is arranged in the elastic substrate with triangular wave patterns and is constituted stretchable knitting Thing inductance.

Preferably, the triangular wave Cycle Length that the silver-plated conductor wire yarn is constituted is 4cm, the silver-plated conductive yarn with Fineness is substrate for the nylon of 1200D, and silver content 33%, resistance are 4~6 ohm/cms, shield electromagnetic frequency and arrive for 0.1MHz 30GHz, its shield effectiveness reach more than 50dB.

Preferably, the resonant inducing circuit is made up of the first electric capacity, the second electric capacity, the 3rd electric capacity and triode;It is described Lead-out wire is connected with described first electric capacity one end, the base stage of the triode and the signal conditioning circuit respectively, and described first The other end of electric capacity is connected with described second electric capacity one end and described 3rd electric capacity one end respectively, the other end of second electric capacity It is connected with described signal tie-in line one end and the transistor collector respectively, the other end and three pole of the 3rd electric capacity The emitter stage connection of pipe.

Preferably, the resonant inducing circuit exports waveform by the way of resonant inducing.

Due to taking above technical scheme, which has advantages below to the present invention:1st, the present invention adopts silver-plated conductive yarn, yarn Line is soft, elasticity is good, and measurement breath signal and respiratory rate are convenient.2nd, the present invention is based on breathing sensing plethysmography conduct Fundamental measurement principle, with silver-plated conductive yarn as breath signal measurement apparatus, more suitable for the monitoring of respiration under motion state, exhales There is very big lifting in terms of the practicality for inhaling measurement.3rd, the present invention adopts fabric respiration measurement sensor, is adapted to portable wearing The respiration measurement of equipment, can meet the accurate measurement to respiratory rate in motion process.4th, the present invention is passed using fabric respiration measurement Sensor, can carry out real time health monitoring to Patients with geriatric cardiovascular and cerebrovascular diseases, inferior health patient and breathing class Disease, also can be to motion The staff for tempering wearer and high-risk environment operation carries out health supervision.

Description of the drawings

Fig. 1 is fabric respiration measurement apparatus structure schematic diagram in the present invention;

Fig. 2 is the circuit diagram of the resonance circuit and signal condition of the present invention;

Fig. 3 is the fabric respiration measurement device schematic flow sheet of the present invention;

Fig. 4 is the plating silver yarn operation principle schematic diagram of the present invention;Wherein, realize representing silver-plated conductive yarn raw bits Put, dotted line represents position after silver-jacketed wire yarn movement;

Fig. 5 is the signal condition schematic flow sheet of the present invention;

Fig. 6 is the breath signal pickup schematic flow sheet of the present invention;

Fig. 7 is the respiratory rate measuring principle schematic diagram of the present invention.

Specific embodiment

With reference to the accompanying drawings and examples the present invention is described in detail.

As shown in Figure 1 and Figure 2, the present invention provides a kind of fabric respiration measurement device, and which includes that fabric sensor, signal connect Enter line 4, resonant inducing circuit 5, lead-out wire 6 and signal conditioning circuit 7;Fabric sensor is by elastic substrate 1, adhesion button 2 and plating Silver-colored conductive yarn 3 is constituted.The two ends of elastic substrate 1 are each provided with two adhesion buttons 2, for elastic substrate 1 is fixed on human body On, silver-plated conductive yarn 3 is arranged in elastic substrate 1, and 3 one end of silver-plated conductive yarn is connected with 4 one end of signal tie-in line, signal 4 other end of tie-in line is connected with resonant inducing circuit 5, and the other end of silver-plated conductive yarn 3 is connected with 6 one end of lead-out wire, is drawn 6 other end of line is connected with resonant inducing circuit 5 and signal conditioning circuit 7 respectively.In thoracic cavity air-breathing, exhalation process, because of thoracic cavity There is expansion, shrink in Volume Changes, silver-plated conductive yarn 3, cause the inductance value of silver-jacketed wire single to change, by signal Modulate circuit 7 is incorporated into the inductance of 3 caused change of silver-plated conductive yarn in resonant inducing circuit 5, by the method for frequency discrimination The signal frequency that the resonant inducing circuit is produced is demodulated, measurement breath signal and respiratory rate is realized.

In above-described embodiment, elastic substrate 1 is made up of elastomeric material, and elastic substrate is 120cm*6cm*2m.

In the various embodiments described above, silver-plated conductive yarn 3 be arranged in elastic substrate 1 with triangular wave patterns constituted it is stretchable Fabric inductance, the triangular wave Cycle Length that silver-plated conductor wire yarn 3 is constituted are 4cm, and silver-plated conductive yarn 3 is with fineness as 1200D Nylon be substrate, silver content 33%, resistance be 4~6 ohm/cms, shielding electromagnetic frequency be 0.1MHz to 30GHz, its screen Cover effect and reach more than 50dB.Silver-plated conductive yarn 3 has silver-colored distinctive superior electrical conductivity energy, while and with good weaving Performance, in addition its elasticity to be measured by measuring the change of silver-plated 3 inductance of conductive yarn considerably beyond other metal wires The change of respective physical amount.

In the various embodiments described above, resonant inducing circuit 5 is by the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and three poles Pipe T is constituted.Lead-out wire 6 is connected with first electric capacity C1 one end, the base stage of triode T and signal conditioning circuit 7 respectively, the first electric capacity The other end of C1 is connected with second electric capacity C2 one end and the 3rd electric capacity C3 one end respectively, the other end of the second electric capacity C2 respectively with letter Number 4 one end of tie-in line and the connection of triode T colelctor electrodes, the other end of the 3rd electric capacity C3 are connected with the emitter stage of triode T.

In the various embodiments described above, as shown in figure 3, a kind of course of work of fabric respiration measurement device is as follows:

1) in thoracic cavity air-breathing, exhalation process, thoracic cavity Volume Changes make silver-plated conductive yarn expansion occur, shrink, such as scheme Shown in 4;

2) inductance of silver-plated conductive yarn changes, and then becomes resonant inducing circuit resonant frequencies generating period Change;

3) sine wave U resonant inducing circuit produced by limited range enlargementFMIt is changed into the side with density distribution Ripple U1, the operation that carries out differentiating to square wave obtains triangular wave U2, and to its halfwave rectifier, as shown in Figure 5, Figure 6;

4) export inverted triangular wave U3, to be inverted triangular wave U3As monostable trigger signal, output and inversion triangular wave U3The related square wave U of density4

5) to square wave U4Frequency discrimination is carried out, breath signal U is demodulated0, the breath signal waveform obtained in actual measurement, such as Shown in Fig. 7, time interval between two crests of breath signal is taken, measurement obtains respiratory rate.

Above-mentioned steps 3) in, resonant inducing circuit 5 exports waveform by the way of resonant inducing.

The present invention also provides a kind of method for designing of fabric sensor, and which comprises the following steps that:

1), when alternating current is passed through in the silver-plated conductive yarn, produce alternation within and around silver-plated conductive yarn Magnetic flux, the magnetic flux of silver-plated conductive yarn are inductance value with the ratio of the electric current for producing this magnetic flux;

If 2) magnetic capacity of magnetic circuit is constant, linear with the magnetic linkage ψ of silver-plated conductive yarn and electric current I, Self-induction L of silver-plated conductive yarn is:

3) when length is passed through electric current for the silver-plated conductive yarn of l, silver-plated conductive yarn outwardly and inwardly produces magnetic Logical, the self-induction of silver-plated conductive yarn is also by internal inductance LiWith external inductance LeConstitute;

4) electric current I is distributed along the sectional uniform of silver-plated conductive yarn, according to loop Ampere's law, with silver-plated conductive yam bobbin Centered on line, x for radius circumference as path of integration, then:

In formula,It is the magnetic field intensity at silver-plated conductive yarn axis x;R is the radius of silver-plated conductive yarn;

5) magnetic field intensity away from silver-plated conductive yarn axis x can be obtained by formula (2)For:

6) magnetic capacity of silver-plated conductive yarn is μ, then the magnetic induction density B at silver-plated conductive yarn axis xxFor:

7) a width is taken at silver-plated conductive yarn axis x for dx, the area that length is 1, then magnetic flux d φiFor:

8) magnetic flux d φiThe silver-plated conductive yarn number of turn for being interlinked isI.e. corresponding magnetic linkage d ψiFor:

9) the total magnetic linkage inside silver-plated conductive yarn is:

In formula, for the magnetic capacity μ ≈ μ of nonferromagnetic material yarn0

10) internal inductance L of silver-plated conductive yarn unit lengthiFor:

11) the external inductance L of silver-plated conductive yarneIt is relevant with magnetic linkage outside silver-plated conductive yarn, from outside silver-plated conductive yarn From the point of view of a bit, the current convergence in silver-plated conductive yarn takes the axis of silver-plated conductive yarn as y on the axis of single Axle, an end points of silver-plated conductive yarn take 1 point of P (x, y) in silver-plated conductive yarn local official, according to Biot-Sa as origin Cut down your law, micro- section of Idy of electric current in infinitely great homogeneous medium1The magnetic induction intensity dB caused by P (x, y) points in its vicinity For:

In formula, d represents this micro- section distance put to P (x, y), i.e.,:d2=x2+(y-y1)2;α represents this apart from radius vector and micro- SectionAngle between direction, i.e.,:

12) when surrounding medium is air, μ=μ0, the magnetic induction density B that silver-plated conductive yarn is put in P (x, y)PFor:

13) the total magnetic linkage outside silver-plated conductive yarn is:

In formula, l > > r;

14) the external inductance L of silver-plated conductive yarn per unit lengtheFor:

15) the inductance L of silver-plated conductive yarn per unit length is:

16) understand that the inductance of silver-plated conductive yarn is relevant with the position of silver-plated conductive yarn by formula (13), it is silver-plated when changing During the distance between conductive yarn, the inductance of silver-plated conductive yarn will be changed therewith, therefore can be by measuring silver-plated conduction The variable quantity of yarn inductance, and then obtain breath signal and respiratory rate.

The various embodiments described above are merely to illustrate the present invention, and the structure of each part, size, set location and shape all can be It is varied from, on the basis of technical solution of the present invention, all improvement individual part carried out according to the principle of the invention and waits With converting, should not exclude outside protection scope of the present invention.

Claims (8)

1. a kind of fabric sensor method for designing, it is characterised in that the method for designing is comprised the following steps:
1) when silver-plated conductive yarn is passed through alternating current, within and around silver-plated conductive yarn, produce alternating flux;
If 2) magnetic capacity of magnetic circuit is constant, linear with the magnetic linkage ψ of silver-plated conductive yarn and electric current I, silver-plated Self-induction L of conductive yarn is:
L = ψ I ;
3) when length is passed through electric current for the silver-plated conductive yarn of l, silver-plated conductive yarn outwardly and inwardly produces magnetic flux, plating The self-induction of silver-colored conductive yarn is also by internal inductance LiWith external inductance LeConstitute;
4) electric current I is distributed along the sectional uniform of silver-plated conductive yarn, according to loop Ampere's law, with silver-plated conductive yarn axis is Center, x for radius circumference as path of integration, then:
In formula,It is the magnetic field intensity at silver-plated conductive yarn axis x;R is the radius of silver-plated conductive yarn;
5) obtain the magnetic field intensity at silver-plated conductive yarn axis xFor:
H x → = x 2 πr 2 I ;
6) magnetic capacity of silver-plated conductive yarn is μ, then the magnetic induction density B at silver-plated conductive yarn axis xxFor:
B x = μ H x → = μ x I 2 πr 2 ;
7) a width is taken at silver-plated conductive yarn axis x for dx, the area that length is 1, then magnetic flux d φiFor:
dφ i = B x d x = μ x I 2 πr 2 d x ;
8) magnetic flux d φiThe silver-plated conductive yarn number of turn for being interlinked isI.e. corresponding magnetic linkage d ψiFor:
dψ i = πx 2 πr 2 dφ i = μx 3 I 2 πr 4 d x ;
9) the total magnetic linkage inside silver-plated conductive yarn is:
ψ i = ∫ 0 r μx 3 I 2 πr 4 d x = μ I 8 π = μ 0 I 8 π ;
In formula, for the magnetic capacity μ ≈ μ of nonferromagnetic material yarn0
10) internal inductance L of silver-plated conductive yarn unit lengthiFor:
L i = μ 0 8 π ;
11) the external inductance L of silver-plated conductive yarneIt is relevant with magnetic linkage outside silver-plated conductive yarn, a little come from outside silver-plated conductive yarn See, the current convergence in silver-plated conductive yarn takes the axis of silver-plated conductive yarn as y-axis on the axis of single, silver-plated One end points of conductive yarn takes one point P (x, y) in silver-plated conductive yarn local official as origin, cuts down you according to Biot-Sa fixed Rule, micro- section of Idy of electric current in infinitely great homogeneous medium1P (x, y) in its vicinity puts caused magnetic induction intensity dB:
d B = μIdy 1 s i n α 4 πd 2 ;
In formula, d represents this micro- section distance put to P (x, y), i.e.,:d2=x2+(y-y1)2;α represents this apart from radius vector and micro- section Angle between direction, i.e.,:
12) when surrounding medium is air, μ=μ0, silver-plated conductive yarn in the magnetic induction intensity that P (x, y) puts is:
B P = μ 0 I 4 π x [ l - y x 2 + ( l - y ) 2 + y x 2 + y 2 ] ;
13) the total magnetic linkage outside silver-plated conductive yarn is:
ψ e = ∫ r ∞ dψ e d x = μ 0 I 2 π [ l × l n l + r 2 + l 2 r - r 2 + l 2 + r ] ≈ μ 0 I l 2 π ( l n 2 l r - 1 ) ;
In formula, l > > r;
14) external inductance of silver-plated conductive yarn per unit length is:
L e = ψ e I l = μ 0 2 π ( l n 2 l r - 1 ) ;
15) inductance of silver-plated conductive yarn per unit length is:
L = L i + L e = μ 0 2 π ( l n 2 l r ) ;
16) inductance of silver-plated conductive yarn is relevant with the position of silver-plated conductive yarn, when change between silver-plated conductive yarn away from From when, the inductance of silver-plated conductive yarn will be changed therewith, therefore by measuring the variable quantity of silver-plated conductive yarn inductance, be entered And obtain breath signal and respiratory rate.
2. a kind of fabric respiration measurement device, it is characterised in that:It includes fabric sensor, signal tie-in line, resonant inducing electricity Road, lead-out wire and signal conditioning circuit;Described fabric sensor one end is connected with the signal tie-in line, the signal tie-in line The other end is connected with the resonant inducing circuit, and the fabric sensor other end is connected with described lead-out wire one end, described to draw The outlet other end is connected with the resonant inducing circuit and the signal conditioning circuit respectively.
3. a kind of fabric respiration measurement device as claimed in claim 2, it is characterised in that:The fabric sensor is by elasticity lining Bottom, adhesion button and silver-plated conductive yarn are constituted;The two ends of the elastic substrate are each provided with two adhesion buttons, described silver-plated Conductive yarn is arranged in the elastic substrate, and described silver-plated conductive yarn one end is connected with described signal tie-in line one end, institute State the silver-plated conductive yarn other end to be connected with described lead-out wire one end.
4. a kind of fabric respiration measurement device as claimed in claim 3, it is characterised in that:The elastic substrate is by elastomeric material Constitute, the elastic substrate is 120cm*6cm*2m.
5. a kind of fabric respiration measurement device as claimed in claim 3, it is characterised in that:The silver-plated conductive yarn is with triangle Waveshape is arranged in the elastic substrate and constitutes stretchable fabric inductance.
6. as claimed in claim 2 or claim 3 a kind of fabric respiration measurement device, it is characterised in that:The silver-plated conductor wire yarn The triangular wave Cycle Length of composition be 4cm, nylon of the silver-plated conductive yarn with fineness as 1200D as substrate, silver content 33%, resistance is 4~6 ohm/cms, and shielding electromagnetic frequency is 0.1MHz to 30GHz, and its shield effectiveness reaches more than 50dB.
7. a kind of fabric respiration measurement device as claimed in claim 2, it is characterised in that:The resonant inducing circuit is by first Electric capacity, the second electric capacity, the 3rd electric capacity and triode are constituted;The lead-out wire respectively with described first electric capacity one end, three pole The base stage of pipe and signal conditioning circuit connection, the other end of first electric capacity respectively with described second electric capacity one end and institute State the connection of the 3rd electric capacity one end, the other end of second electric capacity respectively with described signal tie-in line one end and the triode collection Electrode connects, and the other end of the 3rd electric capacity is connected with the emitter stage of the triode.
8. a kind of fabric respiration measurement device as described in claim 2 or 7, it is characterised in that:The resonant inducing circuit is adopted Waveform is exported with the mode of resonant inducing.
CN201610963881.6A 2016-11-04 2016-11-04 Fabric sensor design method and fabric respiration measuring device CN106510715A (en)

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