CN204813810U - Wearable health monitoring equipment based on circular ring type pressure sensor - Google Patents

Abstract

The utility model relates to a wearable health monitoring equipment based on circular ring type pressure sensor belongs to wearable equipment technical field, and monitoring facilities includes: but a plurality of movement monitoring point, but movement monitoring point wear attach to skin on the clothing, but be equipped with the big or small circular ring type pressure sensor of pressure that microprocessor and monitoring were awaited measuring and a little is received in the movement monitoring point, circular ring type pressure sensor connects microprocessor, microprocessor movement monitoring 0, the treater, but the monitor signal that microprocessor sent is received to wireless connection movement monitoring point, is equipped with alarm unit and threshold value unit in the treater, and alarm unit and threshold value are connected at the treater. The utility model discloses in through using circular ring type pressure sensor to reduce the volume of monitoring point greatly, the volume of monitoring point and the problem that the function can not satisfy the consumer have simultaneously been solved in solitary, alternative use during the monitoring point moreover, have small, the measurement accuracy height, the function is many, but also the advantage that can expand.

Description

Based on the wearable health monitoring equipment of circular ring type pressure transducer

Technical field

This utility model belongs to wearable device technical field, relates to automatic monitoring technical direction, is specifically related to a kind of wearable health monitoring equipment based on circular ring type pressure transducer.

Background technology

Along with embedded and development that is mobile technology, wearable device is own through progressing into market.On the one hand, wearable device is due to the direct physical contact of itself and user, than the subscriber equipment (such as portable equipment) of other types, there is more complicated form, such as, be worn on the head of user, the wearable device of hand or metastomium, often morphological differences is very large, so that the wearing of user.On the other hand, the function of wearable device is also at the future development towards the division of labor that becomes more meticulous, and such as, wearable device can keep a record to different objects or perception, comprise: the humidity of environment, temperature, composition, quality, and the body temperature of user, blood pressure, blood oxygen etc.

Therefore, the trends of design of wearable device is more and more tending towards microminiaturized, person easy to use carries and Dermallly affixed setting, intelligent wrist-watch and intelligent product of dressing is had to come out, but function singleness can not user's request, so the volume size of multi-functional wearable device is a problem demanding prompt solution.

Summary of the invention

According to above the deficiencies in the prior art, the utility model proposes a kind of wearable health monitoring equipment based on circular ring type pressure transducer, by the volume using circular ring type pressure transducer to substantially reduce monitoring point, and independent during monitoring point, optionally use, solve the problem that the volume of monitoring point and function can not meet consumer simultaneously, there is volume little, certainty of measurement is high, and function is many, but also the advantage that can expand.

To achieve these goals, the technical scheme that this utility model is taked is: a kind of wearable health monitoring equipment based on circular ring type pressure transducer, described monitoring equipment comprises: multiple removable monitoring point, removable monitoring point is worn on clothing and is attached to skin, the circular ring type pressure transducer of the pressure size that microprocessor is subject to monitoring tested point is provided with in removable monitoring point, circular ring type pressure transducer connects microprocessor, microprocessor sends wireless signal, circular ring type pressure transducer comprises control unit, the annulus capacitor cell group be connected respectively with control unit and strip capacitor cell group, described annulus capacitor cell group is for surveying the size of tangential force and normal force, described strip capacitor cell group is for measuring the direction of tangential force, described strip capacitor cell group is arranged on the corner of the outer substrate of annulus capacitor cell group, control unit connects the microprocessor of removable monitoring point, processor, the removable monitoring point of wireless connections receives the monitor signal that microprocessor sends, and be provided with alarm unit and threshold cell in processor, alarm unit and threshold value are connected to processor, monitor signal exceedes the value of threshold cell setting, and alarm unit sends alarm signal.

In the said equipment, described annulus capacitor cell group comprises two to above annulus capacitor cell pair, described annulus capacitor cell is to comprising two annulus capacitor cells, described strip capacitor cell group comprises X-direction differential capacitor unit group and Y-direction differential capacitor unit group, X-direction differential capacitor unit group and Y-direction differential capacitor unit group include two or more and mutually form differential capacitor cell module, the comb teeth-shaped structure that described capacitor cell module is made up of plural strip capacitor cell, each annulus capacitor cell and strip capacitor cell include the drive electrode of top crown and the induction electrode of bottom crown.The induction electrode of described each annulus capacitor cell and drive electrode just to and shape is identical, the drive electrode of described each strip capacitor cell is identical with induction electrode width, the drive electrode length of strip capacitor cell is greater than induction electrode length, the drive electrode length two ends reserved left poor position δ respectively of strip capacitor cell _leftwith right poor position δ _right, b _{0 drives}=b _{0 sense}+ δ _right+ δ _left, wherein b _{0 drives}for the drive electrode length of strip capacitor cell, b _{0 sense}for the induction electrode length of strip capacitor cell, the left poor position δ of described strip capacitor cell _left=right poor position δ _right, and wherein d ₀for elastic fluid thickness, G is the modulus of rigidity of elastic fluid, τ _maxfor maximum stress value.Described two groups of drive electrodes mutually forming the strip capacitor cell of differential capacitor cell module and induction electrode are provided with the skew that initially misplaces in the width direction, and dislocation bias size is identical, direction is contrary.Described annulus capacitor cell group comprises n donut capacitor cell, wherein wherein, a _flatfor the length of parallel-plate, r _circlefor the width of annulus capacitor cell annulus, a _{δ circle}electrode spacing between adjacent two annulus capacitor cells.Described annulus capacitor cell group is connected with control unit by a lead-out wire with the drive electrode of strip capacitor cell group, the induction electrode of each annulus capacitor cell of described annulus capacitor cell group goes between separately and to be connected with control unit, and described X-direction differential capacitor unit group is connected with control unit respectively by a lead-out wire with the capacitor cell module induction electrode of Y-direction differential capacitor unit group.Also be provided with reception antenna and trigger element in described removable monitoring point, reception antenna connects on the microprocessor, is charged by reception antenna in removable monitoring point, and trigger element connects microprocessor, and trigger element controls the duty of removable monitoring point.Also be provided with reception antenna and trigger element in described removable monitoring point, reception antenna connects on the microprocessor, is charged by reception antenna in removable monitoring point, and trigger element connects microprocessor, and trigger element controls the duty of removable monitoring point.Also comprise transmitting antenna and power supply in described processor, power supply and transmitting antenna connection handling device, processor carries out wireless charging electric discharge through transmitting antenna.Also comprise selector switch in described processor, the selector switch in processor is arranged corresponding to each removable monitoring point, the duty of the removable monitoring point of selector switch controlled in wireless.Be provided with sound circuit and remote signal circuit in alarm unit in described processor, processor gives by the remote signal circuit group photos and sending messages of alarm unit the guardian dressing monitoring equipment.

This utility model beneficial effect is: provide removable monitoring point to be worn on the stressing conditions of clothing being monitored tested point in this utility model, the function of other sensor elements expansion monitoring point can be increased as required, use circular ring type pressure transducer in monitoring point simultaneously, and effectively solve three-dimensional force by the method such as differential to influence each other, thus make normal direction and tangential conversion all reach higher linear, precision and sensitivity.Be provided with antenna in monitoring point simultaneously and carry out wireless charging, facilitate the process of charging, processor also self can carry out wireless charging electric discharge while providing electric energy to monitoring point.In addition, when wearer occur unexpected or initiatively want to give the alarm signal time, can sending bulk message to guardian, also can cancel the transmission of information, avoid the popular feeling that error situation causes anxious.

Accompanying drawing explanation

Below the content expressed by this Figure of description and the labelling in figure are briefly described:

Fig. 1 is the work structuring schematic diagram of detailed description of the invention of the present utility model.

Fig. 2 is the donut skew dislocation areal analysis figure of detailed description of the invention of the present utility model.

Fig. 3 be detailed description of the invention of the present utility model for the dislocation of outer donut is to external diameter circle analysis chart.

Fig. 4 is the plane design drawing of the parallel plate capacitor of detailed description of the invention of the present utility model.

Fig. 5 is the structure chart of the drive electrode of detailed description of the invention of the present utility model.

Fig. 6 is the rectangular coordinate system of the capacity plate antenna plate of detailed description of the invention of the present utility model.

Fig. 7 is two groups of annulus capacitance group structure charts of detailed description of the invention of the present utility model.

Fig. 8 is the initial dislocation figure of the differential strip capacitor cell of detailed description of the invention of the present utility model.

Fig. 9 is the stressed rear deflection graph of differential strip capacitor cell of detailed description of the invention of the present utility model.

Figure 10 is the differential schematic diagram of signal that the cell capacitance of detailed description of the invention of the present utility model is right.

Figure 11 is the plane-parallel capacitor cross-section structure of detailed description of the invention of the present utility model.

Figure 12 is the work block diagram of the removable monitoring point of detailed description of the invention of the present utility model.

Figure 13 is the work block diagram of the processor of detailed description of the invention of the present utility model.

In figure, 1 is upper PCB substrate, and 2 is lower PCB substrate, and 3 is drive electrode Copper Foil, and 4 is induction electrode Copper Foil, and 5 is pressure transducer.

Detailed description of the invention

Contrast accompanying drawing below, by the description to embodiment, detailed description of the invention of the present utility model is as the effect of the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part and operation principle, manufacturing process and operation using method etc., be described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present utility model, technical scheme.

This utility model provides a kind of wearable health monitoring equipment based on circular ring type pressure transducer, its operating diagram as shown in Figure 1, use circular ring type pressure transducer to form monitoring equipment in this utility model thus greatly reduce the volume of monitoring equipment, pass through wireless power, reduce the volume of monitoring point, energy-storage units and power supply be set in the volume increasing monitoring equipment to a certain extent.And removable monitoring point is undertaken being connected by wireless charging and processor, data transmission, avoid the loaded down with trivial details of data wire and use restriction, simultaneous processor also can be connected in computer and carry out detailed data analysis, amplification data, the little the small screen of processor is checked data are very tired.

Wearable health monitoring equipment comprises multiple removable monitoring point and processor, and removable monitoring point is monitoring point independent one by one, can engage in clothing and be attached on skin, then wireless connections processor.Removable monitoring point individualism work wireless connections processor, removable monitoring point is dismountable to be attached in clothing, and monitoring point volume is little, thickness is thin, sense of discomfort can not be caused, facility easy to use, and detachably change installation site, simultaneously also can unrestricted choice can the usage quantity of monitoring point.

The profile of removable monitoring point is hidden discount shape, and volume is little, and major function is the stressed size of monitoring point to be monitored; thus boundary belt monitoring point, when old man or the wounded dress, thus the stressed size of moment monitoring tested point; record tested point even in everyday situations, thus protection user is looked after one's health.Removable monitoring point comprises monitoring element and the shell of acquired signal; monitoring element is installed in the enclosure; releasably can also engage attaching while shell monitoring for protection element is installed on clothing, and the one side of monitoring element is attached to skin, and another side is hidden in the enclosure.

Monitoring element in removable monitoring point comprises microprocessor, circular ring type pressure transducer, signal projector, micro power, reception antenna, circular ring type pressure transducer connects the signal incoming end of microprocessor, signal projector connects the signal output part of microprocessor, micro power provides electric energy to the work of monitoring point, reception antenna tiling is arranged on monitoring point, connects microprocessor.In order to the element of all right mounting temperature sensor of the function increasing monitoring point, heartbeat sensor, pulse transducer etc. monitoring body signal, increase using function, all belong within the scope of this utility model.

Circular ring type pressure transducer in this utility model

The annulus capacitor cell group that described sensor comprises control unit, be connected respectively with control unit and strip capacitor cell group, described annulus capacitor cell group is for surveying the size of tangential force and normal force, institute's strip capacitor cell group is for measuring the direction of tangential force, and described strip capacitor cell group is arranged on the corner outside substrate annulus capacitor cell group.Annulus capacitor cell group comprises annulus capacitor cell pair more than two, described annulus capacitor cell is to comprising two annulus capacitor cells, described strip capacitor cell group comprises X-direction differential capacitor unit group and Y-direction differential capacitor unit group, X-direction differential capacitor unit group and Y-direction differential capacitor unit group include two or more and mutually form differential capacitor cell module, described capacitor cell module adopts the comb teeth-shaped structure be made up of plural strip capacitor cell, each annulus capacitor cell and strip capacitor cell include the drive electrode of top crown and the induction electrode of bottom crown.The induction electrode of described each annulus capacitor cell and drive electrode just to and shape is identical, the drive electrode of described each strip capacitor cell is identical with induction electrode width, the drive electrode length of strip capacitor cell is greater than induction electrode length, the drive electrode length two ends reserved left poor position δ respectively of strip capacitor cell _leftwith right poor position δ _right, b _{0 drives}=b _{0 sense}+ δ _right+ δ _left, wherein b _{0 drives}for the drive electrode length of strip capacitor cell, b _{0 sense}for the induction electrode length of strip capacitor cell.The left poor position δ of described strip capacitor cell _left=right poor position δ _right, and wherein d ₀for dielectric thickness, G is the modulus of rigidity of elastic fluid, τ _ymaxfor maximum stress value.Described two groups of drive electrodes mutually forming the strip capacitor cell of differential capacitor cell module and induction electrode are provided with the skew that initially misplaces in the width direction, and dislocation bias size is identical, direction is contrary.Described annulus capacitor cell group comprises n donut capacitor cell, wherein wherein, a _flatfor the length of parallel-plate, r _circlefor the width of annulus capacitor cell annulus, a _{δ circle}electrode spacing between adjacent two annulus capacitance.Described capacitor cell module adopts comb teeth-shaped structure, and X-direction differential capacitor unit group and Y-direction differential capacitor unit group include m strip capacitor cell, wherein, a _flatfor the length of parallel-plate, a _{δ bar}for the electrode spacing between adjacent two strip capacitor cells, a ₀the width of strip capacitor cell.The width r of described donut capacitor cell _circlewith the width a of strip capacitor cell ₀equal; Strip capacitor cell electrode spacing a _{δ bar}with annulus capacitor cell electrode spacing a _{δ circle}equal, the width of described strip capacitor cell wherein, d ₀for dielectric thickness, E is the Young's modulus of elastic fluid, and G is the modulus of rigidity of elastic fluid.Described annulus capacitor cell group is connected with control unit by a lead-out wire with the drive electrode of strip capacitor cell group, the induction electrode of each annulus capacitor cell of described annulus capacitor cell group goes between separately and to be connected with control unit, and described X-direction differential capacitor unit group is drawn each via a lead-out wire respectively with the capacitor cell module induction electrode of Y-direction differential capacitor unit group and is connected with control unit.Described annulus capacitor cell, be respectively equipped with intermediate translator between capacitor cell module and control unit, changer is for arranging voltage or frequency to the transmission coefficient of electric capacity.

Below in conjunction with accompanying drawing 2-11 to derivation of the present utility model and principle, to effect and operation principle, manufacturing process and the operation using method etc. of the mutual alignment between each several part shape, structure, each several part and annexation, each several part, be described in further detail.

1.1 capacitance equation and input-output characteristic thereof

The initial capacitance of parallel-plate is:

$C_0=\frac{{\mathrm{\ϵ}}_0.{\mathrm{\ϵ}}_r\·A_0}{d_0}---\left(1\right)$

In formula, ε ₀vacuum medium electric constant is 8.85PF/m, ε _r=2.5 is dielectric relative dielectric constant, A ₀for the initial right opposite of upper bottom crown amasss.D ₀by σ _nexcitation produce relative deformation ε _n=δ _n/ d ₀=σ _n/ E, (1) formula of substitution obtains input-output characteristic

$C_n={\mathrm{\ϵ}}_0.{\mathrm{\ϵ}}_r\frac{A_0}{d_0\left(1-{\mathrm{\ϵ}}_n\right)}={\mathrm{\ϵ}}_0\·{\mathrm{\ϵ}}_r\frac{A_0}{d_0\left(1-\frac{F_n}{AE}\right)}---\left(2\right)$

The linearity under 1.2 normal stress effects and sensitivity

1.2.1 the normal direction linearity

(2) F in formula _nin the denominator, therefore C _n=f (F _n) relation be nonlinear.Because of the maximum σ in conversion range _nmaxcompared with dielectric resilient constant E, ε _na very little amount, i.e. ε in denominator _n<<1, omits the higher-order shear deformation of more than quadratic power by (2) formula by series expansion, can be reduced to:

$C_n=C_0\left(1+\mathrm{\&epsiv;}\right)=C_0\left(1+\frac{F_n}{A\&CenterDot;E}\right)---\left(3\right)$

Visible at C _nwith F _ntransfer characteristic in the maximum relative error of the normal direction linearity close to zero.

1.2.2 sensitivity

By the definition of normal direction sensitivity

By (2) formula then

$S_{n2}=\frac{{\mathrm{dC}}_n}{{\mathrm{dF}}_n}=C_0\&CenterDot;\frac{1}{1-2\mathrm{\&epsiv;}}=C_0\&CenterDot;\frac{1}{1-2\frac{F_n}{A\&CenterDot;E}}---\left(4\right)$

Can linear sensitivity be obtained by (3) formula,

S _n1＝C ₀/AE＝ε ₀ε _r/d ₀E(5)

S _n2with F _nand become, F _nlarger, S _n2larger, in mild nonlinear in whole transfer characteristic.

Relation between 1.3 tangential displacements and annulus capacitor effective area

For donut electric capacity to analyzing, as shown in Figure 2, R ₁for exradius, R ₂for inner circle radius, r=annular width=large exradius R ₁-inner circle radius R ₂.To the power F on drive electrode tangent plane _x, cause drive electrode corresponding up and down and induction electrode to produce one and shear dislocation, if d _xfor tangent plane displacement, dislocation area is S _inand S _outward, the initial right opposite of battery lead plate is long-pending should be π (R ₁ ²-R ₂ ²).Fig. 3 is that outer donut electric capacity justifies analysis chart to external diameter, and before and after mobile, two distance of center circle are from being d _x, before and after mobile, the intersection point of two centers of circle and two circles forms a rhombus, can calculate S _outwardarea:

In above formula, there is d _x<<R ₁, so get

By

Will taylor series expansion, and omit high-order term,

Above formula=π R ₁ ²-2R ₁ ² $\left(\frac{\mathrm{\&pi;}}{2}-\frac{d_x}{2R_1}\right)+d_x{R}_1=2R_1{d}_x$

In like manner, can know, S _in=2R ₂d _x, so the wrong area of donut electric capacity is S=2R ₁d _x+ 2R ₂d _x.

The capacitance variations of the annulus capacitor cell group under 1.4 tangential stress τ excitations

Tangential stress τ does not change the physical dimension parameter A of pole plate ₀, to dielectric thickness d ₀also do not have an impact.But τ _xand τ _ychange the space structure of plane-parallel capacitor, between the upper bottom crown faced by forward, there occurs dislocation skew.The dislocation offset d of pole plate under τ effect _x.When τ is zero, the upper/lower electrode of annulus capacitor cell is just right, effective cross-section between upper/lower electrode in figure 3, at τ _xunder the effect of dextrad, top crown creates dislocation offset d to the right relative to bottom crown _x, thus make the effective area between bottom crown when calculating electric capacity $A_{\mathrm{\&tau;}}={\mathrm{\&pi;R}}_1^2-{\mathrm{\&pi;R}}_2^2-2R_1{d}_x-2R_2{d}_x,$ Consequent electric capacity is:

$C_{\mathrm{\&tau;}x}=\frac{{\mathrm{\&epsiv;}}_0.{\mathrm{\&epsiv;}}_r\&CenterDot;\left({\mathrm{\&pi;R}}_1^2-{\mathrm{\&pi;R}}_2^2-2R_1{d}_x-2R_2{d}_x\right)}{d_0}---\left(6\right)$

According to shearing Hooke's law

τ _x＝γ _x·G＝G·δ _x/d ₀(7)

(7) are substituted into (6) can obtain

$C_{\mathrm{\&tau;}x}=C_0-\frac{{\mathrm{\&epsiv;}}_0\&CenterDot;{\mathrm{\&epsiv;}}_r\&CenterDot;2\left(R_1+R_2\right)d_x}{d_0}=C_0-\frac{{\mathrm{\&epsiv;}}_0\&CenterDot;{\mathrm{\&epsiv;}}_r\&CenterDot;2\left(R_1+R_2\right)F_x}{A_{\mathrm{\&tau;}}G}=C_0-\frac{2{\mathrm{\&epsiv;}}_0\&CenterDot;{\mathrm{\&epsiv;}}_r{F}_x}{G\mathrm{\&pi;}\left(R_1-R{2}_{}\right)}---\left(8\right)$

(8) formula is the input-output characteristics under shearing stress, C _τwith τ _xlinear, its sensitivity

$S_{\mathrm{\&tau;}x}=\frac{{\mathrm{dC}}_{\mathrm{\&tau;}}}{{\mathrm{dF}}_x}=\frac{2{\mathrm{\&epsiv;}}_0\&CenterDot;{\mathrm{\&epsiv;}}_r}{G\mathrm{\&pi;}\left(R_1-R_2\right)}---\left(9\right)$

Tangential sensitivity and R can be found out by formula (9) ₁-R ₂relevant, namely the width of tangential sensitivity and annulus is inversely proportional to, and width more sluggishness is higher.

The design of 2 plate condensers

The design of 2.1 plate condensers

Arrange and the structure chart of Fig. 5 drive electrode, at a 10 × 10mm see the electrode plane in Fig. 4 ²substrate on a kind of circular ring type contact parallel-plate three-dimensional pressure sensor, the annulus capacitor cell group that sensor comprises control unit, be connected respectively with control unit and strip capacitor cell group, annulus capacitor cell group is for surveying the size of tangential force and normal force, strip capacitor cell group is for measuring the direction of tangential force, and strip capacitor cell group is arranged on the corner outside substrate annulus capacitor cell group.Effectively can use the area of parallel-plate like this, annulus capacitor cell group is paved with whole parallel-plate, when measuring three-dimensional force, all work, and strip capacitor cell group effectively make use of annulus capacitor cell group lay after, the space of parallel-plate corner, for measuring the direction of three-dimensional force tangential force.The drive electrode of annulus capacitor cell group and induction electrode are all made up of n donut, and n is even number, then form n/2 annulus capacitor cell pair.Hachure part represents the outer mode cross section of wax-loss casting process, and its geometry and size also should keep accurate when mechanical-moulded.

With reference to the rectangular coordinate system of the capacity plate antenna of Fig. 6, coordinate system origin is at the concentric circular initial point of annulus capacitor cell group, x-axis and y-axis are respectively along the diagonal of capacity plate antenna, X-direction differential capacitor unit group comprises X-direction differential capacitor unit group I and X-direction differential capacitor unit group III, X-direction differential capacitor unit group I and X-direction differential capacitor unit group III lay respectively at the positive and negative semiaxis of x-axis and symmetrical along y-axis, Y-direction differential capacitor unit group comprises Y-direction differential capacitor unit group II and Y-direction differential capacitor unit group IV, Y-direction differential capacitor unit group II and Y-direction differential capacitor unit group IV lay respectively at the positive and negative semiaxis of y-axis and symmetrical along x-axis, X-direction differential capacitor unit group I and X-direction differential capacitor unit group III are formed τ _xmake the differential capacitor unit combination of response, Y-direction differential capacitor unit group II and Y-direction differential capacitor unit group IV are formed τ _ymake the differential capacitor unit combination of response.

Annulus capacitor cell group comprises n donut capacitor cell, wherein wherein, a _flatfor the length of parallel-plate, r _circlefor the width of annulus capacitor cell annulus, a _{δ circle}electrode spacing between adjacent two annulus capacitance.Capacitor cell module adopts comb teeth-shaped structure, and X-direction differential capacitor unit group and Y-direction differential capacitor unit group include m strip capacitor cell, wherein, a _{δ bar}for being provided with electrode spacing, a between adjacent two strip capacitor cells ₀the width of strip capacitor cell.The width r of donut capacitor cell _circlewith the width a of strip capacitor cell ₀equal; Strip capacitor cell electrode spacing a _{δ bar}with annulus capacitance electrode spacing a _{δ circle}equal, the width of described strip capacitor cell wherein, d ₀for dielectric thickness, E is the Young's modulus of elastic fluid, and G is the modulus of rigidity of elastic fluid.

2.2 pumping signals and coordinate system

Annulus capacitor cell is placed in the rectangular coordinate system shown in Fig. 6, three-dimensional simulation puts on the outer surface of capacitor plate, the contact active force produced has Fx, Fy and Fz tri-durection components, and the action direction of Fx and Fy is along X-axis and Y-axis, and the action direction of Fz along OZ axle namely direction, normal direction and tangential stress are a kind of stress tensor, from can the response of output capacitance between the lead-in wire of electrode; Normal stress σ _n=Fn/A, wherein for pole plate normal direction stress surface, Fn=Fz is normal component; Both side surface produces paired tangential stress τ _cut=F _cut/ A.

According to the Hooke's law in Elasticity, σ _nand τ _x, τ _yelastomer all will be made to produce corresponding distortion.Wherein,

${\mathrm{\&sigma;}}_n=E\&CenterDot;{\mathrm{\&epsiv;}}_n=E\&CenterDot;{\mathrm{\&delta;}}_n/d_0=\frac{F_n}{A}$

In formula, E is the Young's modulus GN/m of elastic fluid ², G is the modulus of rigidity GN/m of elastic fluid ², δ n is the Normal Displacement (unit: μm) of elastic fluid, and δ x and δ y is the relative dislocation (unit: μm) of the upper and lower two-plate of annulus capacitor cell, and its sign is pointed to by coordinate axes and determined.

The calculating of 2.3 normal force and tangential force size

Choosing the n-th annulus capacitor cell and the n-th/2 annulus capacitor cell, by setting up annulus capacitor cell, composition equation group being calculated, as shown in Figure 7.If after battery lead plate is subject to normal direction and tangential incentive action, if the output capacitance of the n-th annulus capacitor cell is C ₁, n/2 annulus capacitor cell output capacitance is C ₂, tangential displacement is d _x, the capacitance pole distance of normal direction is d _n, S ₁₀the right opposite initial for outer shroud amasss, S ₂₀the right opposite initial for internal ring amasss.

$C_1=\frac{\mathrm{\&epsiv;}\left(S_{10}-S1\right)}{d_n}=\frac{\mathrm{\&epsiv;}\left({\mathrm{\&pi;R}}_1^2-{\mathrm{\&pi;R}}_2^2\right)}{d_n}-\frac{\mathrm{\&epsiv;}\left(2R_1{d}_x+2R_2{d}_x\right)}{d_n}$ ①

$C_2=\frac{\mathrm{\&epsiv;}\left(S_{20}-S2\right)}{d_n}=\frac{\mathrm{\&epsiv;}\left({\mathrm{\&pi;r}}_1^2-{\mathrm{\&pi;r}}_2^2\right)}{d_n}-\frac{\mathrm{\&epsiv;}\left(2r_1{d}_x+2r_2{d}_x\right)}{d_n}$ ②

Will 1.-2. * obtain:

$C_1-C_2*\frac{R_1+R_2}{r_1+r_2}=\frac{\mathrm{\&epsiv;}\mathrm{\&pi;}\left(R_1^2-R_2^2\right)}{d_n}-\frac{R_1+R_2}{r_1+r_2}*\frac{\mathrm{\&epsiv;}\mathrm{\&pi;}\left(r_1^2-r_2^2\right)}{d_n}$

If in above formula $\frac{R_1+R_2}{r_1+r_2}=K,$ Then $d_n=\frac{\mathrm{\&epsiv;}\left(S_{10}-{\mathrm{KS}}_{20}\right)}{C_1-{\mathrm{KC}}_2}$

According to $d_n=d_0-\mathrm{\&Delta;}d=d_0(1-\frac{F_n}{E\&CenterDot;S_0})$

Known: $F_n=\frac{\left(d_n-d_0\right)E\&CenterDot;S_0}{d_0}$

Above-mentioned is incited somebody to action 1. * C ₂-2. * C ₁obtain:

$d_x=\frac{C_2{S}_{10}-C_1{S}_{20}}{2C_2\left(R_1+R_2\right)-2C_1\left(r_1+r_2\right)};$

By $\mathrm{\&gamma;}=\frac{\mathrm{\&tau;}}{G}=\frac{F_{\mathrm{\&tau;}}}{G\&CenterDot;S_0}=\frac{d_x}{d_0}=\frac{C_2{S}_{10}-C_1{S}_{20}}{d_{0}2C_2\left(R_1+R_2\right)-d_{0}2C_1\left(r_1+r_2\right)},$ So F _τfor

$F_{\mathrm{\&tau;}}=\frac{(C_2{S}_{10}-C_1{S}_{20})\&CenterDot;G\&CenterDot;S_0}{d_{0}2C_2(R_1+R_2)-d_{0}2C_1(r_1+r_2)}$

The direction determining of 2.4 tangential forces

2.4.1 strip capacitor cell group shape structure and parameter design

In order to realize τ _xand τ _ybetween tangential response mutually do not have an impact, drive electrode length two ends reserved difference position δ ₀, therefore b _{0 drives}=b _{0 end}+ 2 δ ₀, wherein at b _{0 drives}two ends length is reserved should be ensured in theory ${\mathrm{\&delta;}}_0\&GreaterEqual;d_0\&CenterDot;\frac{{\mathrm{\&tau;}}_{y\max }}{G},$ Its value of calculation is ${10}^{-5}\&times;\frac{70\&times;{10}^3}{2.4\&times;{10}^6}=2.9\&times;{10}^{-8}m={10}^{-2}um<<1um,$ Therefore should b be ensured in technique _{0 drives}-b _{0 end}>=0.01mm.In order to realize τ _xand τ _ydo not have an impact to the response of normal direction electric capacity, the drive electrode of each strip capacitor cell and induction electrode arrange certain dislocation in horizontal layout and offset, on by differential elimination impact each other.

As shown in Figure 5, in figure, four dashed rectangle are the benchmark of induction electrode on bottom crown, get the position of induction electrode in lower floor's PCB substrate as reference, then the layout of drive electrode in the PCB substrate of upper strata should with PCB substrate edge line for benchmark.Each strip capacitor cell comprises the drive electrode of top crown and the induction electrode of bottom crown, if often root strip capacitor cell is wide is a ₀, the groove width between two strip capacitor cells is a _δ, then the pitch of every root strip capacitor cell is a ₀+ a _δ.τ can be ensured like this when computing method exports response to electric capacity _xand τ _ythe response of normal direction electric capacity is not had an impact.And put they and geometry datum line differential apart from being δ ₀(0.1mm), to ensure that X-direction differential capacitor unit group I and X-direction differential capacitor unit group III produce τ _xdifferential capacitor export response, Y-direction differential capacitor unit group II and Y-direction differential capacitor unit group IV then only produce τ _ydifferential capacitor response, an initially dislocation skew δ is set _xo, its value should ensure its value of calculation and δ ₀similar, its skew that initially misplaces all arranges δ _xo=δ _yo=0.01mm, to ensure that four capacitor cells are at τ _xand τ _ytwo groups of differential capacitors pair can be produced under tangential excitation.

In Fig. 8, a pair electric capacity C _land C _relectrode size a ₀, b ₀, d ₀all identical, initial dislocation skew δ ₀also identical, difference is left side capacitor C _lupper strata δ ₀wedge angle be oriented to+OX, and the right capacitor C _rupper strata δ ₀wedge angle sensing-OX.Work as τ _xwhen=0, $C_L=C_R=C_{\mathrm{\&tau;}0}=C_0-\frac{{\mathrm{\&epsiv;}}_0\&CenterDot;{\mathrm{\&epsiv;}}_r\&CenterDot;\left({\mathrm{\&delta;}}_0\right)\&CenterDot;b_0}{d_0},$ Namely the electric capacity in figure corresponding to dash area.On this basis, as generation ± δ under-Fx excitation _xdislocation skew, formed as shown in Figure 9 electric capacity increase and decrease effect,

$C_L=\frac{{\mathrm{\&epsiv;}}_0\&CenterDot;{\mathrm{\&epsiv;}}_r\&CenterDot;b_0\&CenterDot;\left(a_0-{\mathrm{\&delta;}}_0\&PlusMinus;{\mathrm{\&delta;}}_x\right)}{d_0}---\left(10\right)$

In Fig. 9, C _land C _rdifferential capacitor is to same τ _xby generation ± δ _xwith ± △ C _τresponse, $\&PlusMinus;{\mathrm{\&delta;}}_x=\&PlusMinus;d_0\frac{{\mathrm{\&tau;}}_x}{G}.$ δ ₀size should meet ${\mathrm{\&delta;}}_0\&GreaterEqual;\&PlusMinus;{\mathrm{\&delta;}}_{\mathrm{\&tau;}\max }=\frac{{\mathrm{\&tau;}}_{x\max }}{G}\&CenterDot;d_0,$ Desirable δ ₀=10 μm, thus, formula (8) can be revised as

$C_{\mathrm{\&tau;}x}=C_{\mathrm{\&tau;}0}\&PlusMinus;\frac{{\mathrm{\&epsiv;}}_0\&CenterDot;{\mathrm{\&epsiv;}}_r}{{\mathrm{Ga}}_0}{F}_x---\left(11\right)$

In formula, for initial capacitance when shearing stress is zero, (11) formula is shearing stress input-output characteristic, C _{τ x}with F _xlinear relationship, and its sensitivity

By formula (11) known a ₀less, the sensitivity of tangential stress response is larger, therefore this utility model capacitor cell adopts the strip capacitor cell group be made up of multiple strip electric capacity.

2.4.2 tangential stress direction calculating

C _ito C _iIand C _iIIto C _iVtwo can be realized to differential combination, the differential schematic diagram of the signal that the cell capacitance as Figure 10 is right, through differential technique process, the overall response of differential output

$O_{\mathrm{\&tau;}x}=\frac{2{\mathrm{mK\&epsiv;}}_0\&CenterDot;{\mathrm{\&epsiv;}}_r}{a_{0}G}{F}_x---\left(12\right)$

In formula, no matter be normal direction excitation F _nor tangentially encourage F _yall not to O _τhave an impact, namely automatically eliminate σ _nand τ _yto τ _xthe coupling of total output or interference.Because every in signal packet containing in the computing of subtracting each other, equivalent and all automatically eliminating with the capacitance variations that meets.And F _yand F _xto σ _ninterference by upper electrode at b ₀direction increases geometrical length 2 δ ₀eliminate.

In like manner, $O_{\mathrm{\&tau;}y}=\frac{2{\mathrm{mK\&epsiv;}}_0\&CenterDot;{\mathrm{\&epsiv;}}_r}{a_{0}G}{F}_y;$

According to O _{τ x}and O _{τ y}value calculate the direction of tangential force.

2.4 main material selection and characterisitic parameter thereof

The section of structure of plane-parallel capacitor is similar to sandwich structure as shown in figure 11.As shown in Figure 11,1 is upper PCB substrate, and 2 is lower PCB substrate, and 3 is drive electrode, and 4 is induction electrode, and 5 is elastic fluid.Pole plate is apart from d ₀=0.1mm, upper and lower base plate inner space, except copper foil electrode, is PDMS (polydimethylsiloxane) the superlastic dielectric with lost wax process filling.Its machinery and physical characteristic parameter are Young's modulus E=6.2MPa, and its shear modulus is G=4.1MPa, relative DIELECTRIC CONSTANT ε during dielectric polorization _γ=2.5.Because E and G of medium is much smaller than the elastic modulus E of copper _copper=103GPa, therefore the distortion of capacitor internal medium under stress state is much larger than the distortion of pole plate.

2.5 contact conductor designs

Be that drive electrode or induction electrode all need to have lead-out wire, consider that each drive electrode is all ground connection in signal level, therefore drive electrode only need share same lead-out wire.Annulus capacitor cell group is connected with control unit by a lead-out wire with the drive electrode of strip capacitor cell group, each annulus of described annulus capacitor cell group goes between separately and to be connected with control unit, control unit calculates according to the output valve independent assortment of each annulus, carry out being averaging the size and normal force size that draw tangential force afterwards, when required precision is not high, annulus capacitor cell group can only select two optimum annulus to draw 2 lead-in wires, obtains d by these two annulus _xand d _n, thus draw size and the normal force size of tangential force; X-direction differential capacitor unit group and Y-direction differential capacitor unit group are drawn each via a lead-out wire respectively and are connected with control unit, for calculating the direction of tangential force.Be provided with intermediate translator between described control unit and capacitor cell, changer is for arranging voltage or frequency to the transmission coefficient of electric capacity.Whole capacitance component has at least 7 pins and draws from the side of planar package, so that whole assembly top and bottom outer surface can contact with measuring object easily.

This utility model, under the support of new material and new technology, completes the design of a kind of novel three-dimensional power sensitization capacitance combination.At 10 × 10mm ²stress surface on, be no matter normal direction or tangential, all can transmit stress more uniformly to medium.In the contact of non-coplanar force and sensor surface, external force only has 1, and can obtain the information of normal direction Fn to electric capacity summation, namely whole battery lead plate is all to asking Fn to contribute, and can obtain F again simultaneously _xand F _yinformation, thus complete description three-dimensional force, can improve the normal direction sensitivity and tangential sensitivity and maximum linear error once changed by design parameter.

The work structuring block diagram of removable monitoring point as shown in figure 12, also signal projector is provided with in removable monitoring point, circular ring type pressure sensor monitoring to stress value be sent to microprocessor, simultaneously, in order to expand the function of monitoring point, the temperature that also can increase, heart rate or pulse transducer, sensor all can be set together with circular ring type pressure transducer, and the signal that transmission monitors is to microprocessor.The outfan of microprocessor is connected with signal projector and reception antenna, the signal received is sent in the processor of wearable device through signal projector, by processor statistical monitoring point detection data and store data in data base, facilitate statistical conversion and calling.Be provided with micro power in monitoring point and carry out power supply supply, removable monitoring point overall structure is simple, power consumption is little, and micro power enough supports the supply of electrical energy work of monitoring point, conveniently power source charges, in monitoring point, be provided with reception antenna in this utility model, carry out wireless charging.The power supply of processor is provided with transmitting antenna equally, by antenna transmission electromagnetic wave, reception antenna in monitoring point receives electromagnetic wave and is converted into electric energy, although charging can ensure that the power supply moment of monitoring point remains on full scale state, but moment charging affects the service life of monitoring point, so this utility model is provided with electric quantity monitoring unit in monitoring point, when microprocessor receives electricity too low signal, can automatically open antenna transmission charging signals to processor, microprocessor and processor are opened simultaneously and are charged, after monitoring point is full of electricity, microprocessor cuts out antenna, launch the full signal of electricity to processor, processor cuts out transmitting antenna equally, avoid electromagnetic wave always in running order, affect the service life of electrical equipment.If when electric quantity of power supply deficiency in processor, processor also can carry out wireless charging by transmitting antenna, avoids the trouble of wired charging, the obstacle of circuit.

Processor in this utility model is that the little functional equivalent of moveable volume is in the device of display equally, processor can be carried with, have the function of reporting to the police and recording tested point signal, processor can be set to integrative-structure with wrist-watch or mobile phone, easy to carry so attractive in appearance again.Processor is a miniature signal receiving end, there is the function and stored signal data function that give the alarm when monitor signal exceedes the danger signal of setting threshold value, the power supply reserve of electricity of simultaneous processor is larger than the power supply reserve of electricity of microprocessor, processor as stand-by power supply for monitoring point provides electric energy to ensure.

The work structuring block diagram of processor as shown in figure 13, antenna, data base, selector switch, power supply is provided with in processor, power supply and antenna connection handling device, power supply provides energy source for processor work, simultaneously as the stand-by power supply of monitoring point, when receiving the low electric quantity signal that microprocessor sends, processor unlatching antenna sends the electromagnetic wave carrying electric energy and charges to microprocessor in microprocessor, when after microprocessor charging complete, microprocessor sends the full signal of electricity to processor, and processor cuts out electromagnetic wave signal.The monitor signal of the monitoring point that processor receives and the every signal through processor of charging signals are all preserved in a database, by installing communications protocol communication between monitoring point and processor, so the data of data base also can copy out to put carry out data analysis in a computer.The duty of selector switch controlled in wireless monitoring point, trigger element is provided with in microprocessor in monitoring point, because monitoring point has multiple, user can be selected arbitrarily several at every turn, is arbitrarily worn on tested point place, does not need each wearing, so the duty of monitoring point needs to control, when receiving start signal, just in running order, so be provided with trigger element in monitoring point.Selector switch in processor controls trigger element, monitoring point carries out labelling setting that selector switch in processor is corresponding, multiple monitoring point needs labelling respectively, use one of them in order to avoid long-time and do not know, or producer improves in monitoring in part as required at o'clock, all need in these situations to carry out labelling to monitoring point, the corresponding monitoring point of labelling in selector switch, after monitoring point is worn on tested point, user is the interior monitoring point labelling clicking use of selector switch item within a processor, processor sends triggering signal, after trigger element in monitoring point receives trigger-type signal, monitoring point is opened in running order.The setting of trigger element and selector switch is to distinguish monitoring point, records the service time of each monitoring point, controls the duty of monitoring point, avoids that monitoring point is always in running order affects service life.

Alarm unit and threshold cell is also provided with in processor, the data of threshold cell are the warning line data set in advance, once exceed threshold data, alarm unit gives the alarm signal, alarm unit is except sounding except warning, and can send remote signal on guardian's mobile phone of user, alarm unit inside is provided with mass-sending function, alarm signal can be mass-sended on several mobile phone, avoid the situation generation that a mobile phone by chance shuts down.GPS positioning unit is also provided with in processor, when processor monitors the data exceeding threshold signal, GPS locating information is included in the warning information sent, guardian is facilitated to find wearer in time, avoid just in case the generation of situation, as wearer is subject to hard hit, the emergency case such as faints suddenly.

Manual alarm button is also provided with in simultaneous processor, when the wearer of monitoring point feel uncomfortable or in the hole under, time monitoring point does not monitor out in time, wearer directly can press alarm button stealthily, guardian receives alarm signal and locating information, can arrive in the very nick of time.Once wearer's hands is by mistake or under encountering because of carelessness and being in the situation of not hindering, do not need to send alarm signal, but warning sound sounds, alarm signal sends, in order to reduce everybody worry, also can cancel the transmission of alarm signal or sending safety information to guardian.So processor is also provided with one not hinder button, when alarming sound sound equipment rises, illustrate that alarm signal sends, wearer feels that health does not hinder or just careless, there is no need to cause everybody flurried, do not hinder button so can click, resend and once do not hinder information on guardian's mobile phone, avoid tutorial worry with flurried.

By reference to the accompanying drawings this utility model is exemplarily described above; obvious this utility model specific implementation is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present utility model is conceived and technical scheme is carried out; or design of the present utility model and technical scheme directly applied to other occasion, all within protection domain of the present utility model without to improve.The protection domain that protection domain of the present utility model should limit with claims is as the criterion.

Claims (10)

1., based on a wearable health monitoring equipment for circular ring type pressure transducer, it is characterized in that, described monitoring equipment comprises:

Multiple removable monitoring point, removable monitoring point is worn on clothing and is attached to skin, the circular ring type pressure transducer of the pressure size that microprocessor is subject to monitoring tested point is provided with in removable monitoring point, circular ring type pressure transducer connects microprocessor, microprocessor sends wireless signal, circular ring type pressure transducer comprises control unit, the annulus capacitor cell group be connected respectively with control unit and strip capacitor cell group, described annulus capacitor cell group is for surveying the size of tangential force and normal force, described strip capacitor cell group is for measuring the direction of tangential force, described strip capacitor cell group is arranged on the corner of the outer substrate of annulus capacitor cell group, control unit connects the microprocessor of removable monitoring point,

Processor, the removable monitoring point of wireless connections receives the monitor signal that microprocessor sends, and be provided with alarm unit and threshold cell in processor, alarm unit and threshold value are connected to processor, monitor signal exceedes the value of threshold cell setting, and alarm unit sends alarm signal.

2. the wearable health monitoring equipment based on circular ring type pressure transducer according to claim 1, it is characterized in that, described annulus capacitor cell group comprises two to above annulus capacitor cell pair, described annulus capacitor cell is to comprising two annulus capacitor cells, described strip capacitor cell group comprises X-direction differential capacitor unit group and Y-direction differential capacitor unit group, X-direction differential capacitor unit group and Y-direction differential capacitor unit group include two or more and mutually form differential capacitor cell module, the comb teeth-shaped structure that described capacitor cell module is made up of plural strip capacitor cell, each annulus capacitor cell and strip capacitor cell include the drive electrode of top crown and the induction electrode of bottom crown.

3. the wearable health monitoring equipment based on circular ring type pressure transducer according to claim 1, it is characterized in that, the induction electrode of described each annulus capacitor cell and drive electrode just to and shape is identical, the drive electrode of described each strip capacitor cell is identical with induction electrode width, the drive electrode length of strip capacitor cell is greater than induction electrode length, the drive electrode length two ends reserved left poor position δ respectively of strip capacitor cell _leftwith right poor position δ _right, b _{0 drives}=b _{0 sense}+ δ _right+ δ _left, wherein b _{0 drives}for the drive electrode length of strip capacitor cell, b _{0 sense}for the induction electrode length of strip capacitor cell, the left poor position δ of described strip capacitor cell _left=right poor position δ _right, and wherein d ₀for elastic fluid thickness, G is the modulus of rigidity of elastic fluid, τ _maxfor maximum stress value.

4. the wearable health monitoring equipment based on circular ring type pressure transducer according to claim 1, it is characterized in that, described two groups of drive electrodes mutually forming the strip capacitor cell of differential capacitor cell module and induction electrode are provided with the skew that initially misplaces in the width direction, and dislocation bias size is identical, direction is contrary.

5. the wearable health monitoring equipment based on circular ring type pressure transducer according to claim 1, is characterized in that, described annulus capacitor cell group comprises n donut capacitor cell, wherein wherein, a _flatfor the length of parallel-plate, r _circlefor the width of annulus capacitor cell annulus, a _{δ circle}electrode spacing between adjacent two annulus capacitor cells.

6. the wearable health monitoring equipment based on circular ring type pressure transducer according to claim 1, it is characterized in that, described annulus capacitor cell group is connected with control unit by a lead-out wire with the drive electrode of strip capacitor cell group, the induction electrode of each annulus capacitor cell of described annulus capacitor cell group goes between separately and to be connected with control unit, and described X-direction differential capacitor unit group is connected with control unit respectively by a lead-out wire with the capacitor cell module induction electrode of Y-direction differential capacitor unit group.

7. the wearable health monitoring equipment based on circular ring type pressure transducer according to claim 1, it is characterized in that, reception antenna and trigger element is also provided with in described removable monitoring point, reception antenna connects on the microprocessor, charged by reception antenna in removable monitoring point, trigger element connects microprocessor, and trigger element controls the duty of removable monitoring point.

8. the wearable health monitoring equipment based on circular ring type pressure transducer according to claim 1, it is characterized in that, also comprise transmitting antenna and power supply in described processor, power supply and transmitting antenna connection handling device, processor carries out wireless charging electric discharge through transmitting antenna.

9. the wearable health monitoring equipment based on circular ring type pressure transducer according to claim 1, it is characterized in that, also selector switch is comprised in described processor, selector switch in processor is arranged corresponding to each removable monitoring point, the duty of the removable monitoring point of selector switch controlled in wireless.

10. the wearable health monitoring equipment based on circular ring type pressure transducer according to claim 1, it is characterized in that, be provided with sound circuit and remote signal circuit in alarm unit in described processor, processor gives by the remote signal circuit group photos and sending messages of alarm unit the guardian dressing monitoring equipment.