CN106289594A - Three-dimension deformation-quantity and the sensor array of three-dimensional pressure high-precise synchronization measurement can be realized - Google Patents
Three-dimension deformation-quantity and the sensor array of three-dimensional pressure high-precise synchronization measurement can be realized Download PDFInfo
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- CN106289594A CN106289594A CN201610948314.3A CN201610948314A CN106289594A CN 106289594 A CN106289594 A CN 106289594A CN 201610948314 A CN201610948314 A CN 201610948314A CN 106289594 A CN106289594 A CN 106289594A
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- capacitor cell
- elastic
- contact electrode
- polymer substrate
- sensor array
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
- G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
- G01L1/146—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors for measuring force distributions, e.g. using force arrays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2287—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges constructional details of the strain gauges
Abstract
The present invention relates to a kind of sensor array realizing three-dimension deformation-quantity and the measurement of three-dimensional pressure high-precise synchronization, belong to the sensor array of 3-D parameter high-acruracy survey.Including lower flexible PCB, carry reeded lower elastic polymer substrate, arrange capacitor cell in a groove and elastic pressure drag cell array, upper elastic polymer substrate, upper flexible PCB；It is adjacent that capacitor cell and elastic pressure drag unit collection reticulate sensor array structure, the most each capacitor cell and six elastic pressure drag unit.This sensor array is capable of the synchro measure of interface three-dimensional pressure and three-dimension deformation-quantity；Capacitor cell records the size of pressure, and elastic pressure drag unit determines the direction in space of pressure, can realize the high-acruracy survey of three-dimensional pressure.Can be applicable to the parameter measurement at the interface such as seat, shoe pad, provide the most complete parameter index for ergonomics field.
Description
Technical field
The present invention relates to the sensor array of a kind of 3-D parameter high-acruracy survey, specially one and can realize three-dimension deformation-quantity
The sensor array measured with three-dimensional pressure high-precise synchronization.
Background technology
The three-dimensional pressure at interface and three-dimension deformation-quantity provide important parameter index for ergonomics field, for seat,
The products such as shoe pad provide the reference frame designing, improving, evaluate.For being chronically at the crowd of sitting and lying attitude, such as office's work
Make personnel, long-distance bus drivers, hemiplegia or bedfast sufferer, if it is unreasonable to make body local be chronically at pressurized
State, can cause serious disease.Therefore, interface three-dimensional pressure and accurately measuring of three-dimension deformation-quantity had important research meaning
Justice.
For obtaining reliable accurate interface parameter, the flexible sensing array of various measurement three-dimensional pressures becomes the heat of research
Point.But current research carries out the sensor of high-acruracy survey to three-dimensional pressure and three-dimension deformation-quantity the most simultaneously.3 D deformation
Amount can reflect that compliant interface is applied in the three-D profile that external load deformation is later intuitively, such as by recording three-dimensional change
Shape quantitative response people's chair effect envelope surface situation, increases envelope surface area and can reduce the average pressurized of human body, thus improve seat
Chair comfortableness.Therefore, the 3 D deformation measurement of compliant interface is the most significant.The measurement system of research is also deposited at present
In a lot of limitations, degree of accuracy also has much room for improvement, the pressure researched and developed such as Xsensor company of Canada, Tekscan company of the U.S.
Distribution measurement system is only capable of obtaining the one-dimensional pressure distribution of vertical direction by mathematical algorithm projection, and measurement result is the most accurate.
China national patent of invention (open CN104215363A), discloses a kind of flexible tactile and slip sense based on pressure-sensitive conductive rubber and is combined
Sensor array, is only capable of quickly judging whether producing Slip Signal, it is impossible to accurately measure three-dimension deformation-quantity, and only pass through
Elastic pressure drag unit records three-dimensional pressure decoupling complexity, there is hysteresis phenomenon, and the dynamic not having capacitor cell is good.
Owing to capacitance type sensor has the advantages such as measurement is highly sensitive, temperature impact is little, dynamic response is good, prior art
Study more employing combination capacitor formula sensor array and measure the three-dimensional pressure at interface.China national patent of invention (publication No.
CN103743503A), disclose a kind of based on pressure resistance type with the flexible 3 D force-touch sensor of capacitive combination, each three-dimensional
The power sensitivity foil gauge of the most integrated vertical layout of power sensing unit and four groups of inductance capacitances vertically arranged, respectively to vertical method
Sensitive to power and horizontal tangential power.This measurement system have ignored the battery lead plate horizontally and vertically arranged and can occur after interface deformation
The change of locus, owing to the locus after capacitor cell battery lead plate stress cannot obtain, the direction in space of pressure cannot
Accurately record, it is therefore possible for the detected that three-dimensional pressure degree of accuracy the highest.And the function of this measurement system is only limitted to survey three-dimensional pressure,
Three-dimension deformation-quantity can not be measured simultaneously.Equally, great majority use Combined electric capacity sensor array to survey the survey of three-dimensional pressure
Amount system has drawbacks described above and deficiency.
The limitation that the sensor array of three-dimensional pressure designs due to structure can be recorded at present, resolution all can not reach the highest and
Structure is the compactest.If the thickest load area that can reduce human body and compliant interface of sensor, so that it is actual to measure only ratio
Value height, measurement structure is the most accurate.Such as Chinese invention patent (publication No. CN103134622), disclose a kind of three-dimension flexible and touch
Sense sensor array, owing to each sensing unit is made up of three sections of cylindrical body, and vertical column height reaches 6-10mm, sensor
The thickest make to measure not inaccurate, and decoupling complexity.
Summary of the invention
The present invention provides a kind of sensor array realizing three-dimension deformation-quantity and the measurement of three-dimensional pressure high-precise synchronization, to solve
Certainly presently, there are certainty of measurement low, spatial resolution is low, the problem that structure is the compactest.
The technical solution used in the present invention is: include lower flexible PCB, carries reeded lower elastic polymer substrate, cloth
Put capacitor cell in a groove and elastic pressure drag cell array, upper elastic polymer substrate, upper flexible PCB；Capacitor cell
To reticulate sensor array structure, the most each capacitor cell and six elastic pressure drag unit adjacent with elastic pressure drag unit collection.
Central contact electrode on lower flexible PCB of the present invention, peripheral contact electrode are protruding column shape, often
Individual central contact electrode and six adjacent peripheral contact electrodes constitute contact electrode group, wherein central contact electrode and an electric capacity
Unit is corresponding, and six peripheral contact electrodes are corresponding with one end of six elastic pressure drag unit respectively.
On the reeded lower elastic polymer substrate of band of the present invention, the groove of each layout capacitor cell respectively with
The groove arranging six elastic pressure drag unit is adjacent but does not connects；Arrange that the groove center of capacitor cell processes a through hole, through hole
Diameter identical with the diameter of central contact electrode, arrange that the groove two ends of elastic pressure drag unit process a through hole, through hole respectively
Diameter identical with the diameter of peripheral contact electrode；Ensure that the central contact electrode on lower flexible PCB is through lower elastic high score
Through hole corresponding on submounts contacts with capacitor cell, and peripheral contact electrode is through through hole corresponding on lower elastic polymer substrate
With elastic pressure drag unit ends contact, it is achieved the connection of circuit.
The capacitor cell being arranged in lower elastic polymer substrate recess of the present invention includes lower sensitive electrical pole plate, in
Between electrolyte, upper sensitive electrical pole plate；Elastic pressure drag unit as sensing unit, is used injection molding method to incite somebody to action by conductive rubber
Conductive rubber is poured on lower elastic polymer substrate in the groove that elastic pressure drag unit is corresponding, constitutes netted sensor array.
Upper elastic polymer substrate of the present invention has and capacitor cell groove one to one, and groove center processing
There is through hole；Netted sensor array structure is isolated by upper elastic polymer substrate with upper flexible PCB, plays the netted sensing of protection
The effect of array structure.
Electrode and the through hole one_to_one corresponding on upper elastic polymer substrate is contacted on upper flexible PCB of the present invention,
Make the contact electrode on flexible PCB through upper sensitive electrical pole plate the most stable the connecing of holding of through hole with capacitor cell
Touch.
Capacitor cell of the present invention is dismountable, if wanting to record more multiple solutions parameter, can be replaced by capacitor cell
For other sensing units, such as temperature sensing unit, humidity sensing unit, vibrating sensing unit；The sensing unit replaced equally may be used
It is connected with external circuit by the contact electrode of upper and lower flexible PCB.
Measuring principle of the present invention is: the pressure being recorded each node (center of capacitor cell) by capacitor cell is big
Little, i.e. it is perpendicular to the pressure size in capacitor cell sensitive electrical pole plate direction, six the elastic pressures utilizing each capacitor cell adjacent
Resistance deflection measured by unit obtains the three-dimensional coordinate of each node, is obtained the three-D profile curved surface at interface by interpolation fitting
(i.e. the three-dimension deformation-quantity at interface), on three-D profile curved surface, the direction in space of each node pressure is perpendicular to cutting of this node
Plane, thus can get the three-dimensional pressure of each node.
The invention has the beneficial effects as follows:
(1) present invention can realize the synchro measure of three-dimension deformation-quantity and three-dimensional pressure, meanwhile, and also can be by dismountable electric capacity
Unit replaces to other sensing units, it is achieved sensor array multi-functional.
(2) present invention use capacitive sensor unit have measurement highly sensitive, temperature is little to performance impact, dynamic
The advantages such as response is good, while utilizing the good characteristic of capacitance type sensor, by the innovative design to sensor array structure, solve
Most of Combined electric capacity sensor array of having determined is measured the technical problem generally existed, i.e. capacitor cell and is occurred for three-dimensional pressure
Spatial position change and the inaccuracy of measurement data that causes, it is achieved the accurate measurement to three-dimensional pressure.
(3) the capacitor cell size that the present invention uses is little, simple in construction, and compact conformation between each sensing unit improves
The spatial resolution that sensor array is measured；By measurement result is carried out data analysis, after obtaining three-dimensional pressure gradient figure, again
Design becomes the sensing unit array of distribution density, the position that gradient is big is rationally increased sensing unit quantity and improves sensing further
The spatial resolution of array measurement, can reasonably reduce sensing unit quantity to reduce measurement system to the position that gradient is less
This.
(4) present invention uses injection molding method that conductive rubber glue is poured into the elasticity on lower elastic polymer substrate
In pressure drag unit groove, it is substantially shorter the processing technique time, makes simpler convenience, it is easy to accomplish.Conductive rubber has
Well force-sensitive property, and cost is relatively low.
(5) each interlayer structure of inventive sensor is compact, overall sensor can be designed to the thinnest, it is to avoid because sensing
Device is the thickest produces the situation that the three-dimensional pressure measured is higher than actual value.Capacitor cell is designed to round sheet, it is to avoid sensing arrangement
The impact that seat comfort is caused.The flexible of sensor preferably can prevent structural failure that is excessive due to pressurized and that cause, weight
Multiple usability is good.
Sensor array the most of the present invention is capable of the synchro measure of interface three-dimensional pressure and three-dimension deformation-quantity；Capacitor cell
Recording the size of pressure, elastic pressure drag unit determines the direction in space of pressure, can realize the high-acruracy survey of three-dimensional pressure, can answer
For the parameter measurement at the interface such as seat, shoe pad, provide the most complete parameter index for ergonomics field.
Accompanying drawing explanation
Fig. 1 is the sectional view of sensor array of the present invention；
Fig. 2 is the hierarchy schematic diagram of inventive sensor array；
Fig. 3 (a) is the lower flexible PCB schematic diagram of sensor array of the present invention；
Fig. 3 (b) is the lower flexible PCB local A enlarged drawing of sensor array of the present invention；
Fig. 4 (a) be sensor array of the present invention band groove under elastic polymer substrate schematic diagram；
Fig. 4 (b) be sensor array of the present invention band groove under elastic polymer substrate local B enlarged drawing；
Fig. 5 (a) is the capacitor cell of sensor array of the present invention and elastic pressure drag cellular array structural representation；
Fig. 5 (b) is the capacitor cell of sensor array of the present invention and elastic pressure drag cellular array structure partial C enlarged drawing；
Fig. 6 (a) is the structural representation of the capacitor cell of the present invention；
Fig. 6 (b) is the hierarchy schematic diagram of the capacitor cell of the present invention；
Fig. 7 (a) is the schematic diagram of the upper elastic polymer substrate of the sensor array of the present invention；
Fig. 7 (b) is the local E enlarged drawing of the upper elastic polymer substrate of the sensor array of the present invention；
Fig. 8 (a) is the upper flexible PCB schematic diagram of the sensor array of the present invention；
Fig. 8 (b) is the local D enlarged drawing of the upper flexible PCB of the sensor array of the present invention；
Fig. 9 is three-dimension deformation-quantity and the theory diagram of three-dimensional pressure measurement of the present invention；
Figure 10 is three-dimension deformation-quantity and the principle explanatory diagram of three-dimensional pressure measurement of the present invention；
In figure: upper flexible PCB 1, upper elastic polymer substrate 2, elastic pressure drag unit 3, capacitor cell 4, lower elastic height
Molecule substrate 5, lower flexible PCB 6, contact electrode 101, upper sensitive electrical pole plate 401, intermediate dielectric 402, lower sensitive electrode
Plate 403, central contact electrode 601, peripheral contact electrode 602.
Detailed description of the invention
Sensor array (the sensing of three-dimension deformation-quantity and the measurement of three-dimensional pressure high-precise synchronization can be realized below with people's chair interface
The overall dimensions of array structure is consistent with seat interface) illustrate as embodiment.
Including lower flexible PCB 6, carry reeded lower elastic polymer substrate 5, arrange capacitor cell 4 in a groove
With elastic pressure drag unit 3 array, upper elastic polymer substrate 2, upper flexible PCB 1；Capacitor cell 4 and elastic pressure drag unit 3
Collection reticulates sensor array structure, and the most each capacitor cell 4 is adjacent with six elastic pressure drag unit 3.
Central contact electrode 601, peripheral contact electrode 602 on lower flexible PCB 6 of the present invention are round in projection
Column, the peripheral contact electrode 602 that each central contact electrode 601 is adjacent with six constitutes one and contacts electrode group, wherein center
Contact electrode 601 is corresponding with capacitor cell 4, six peripheral contact electrodes 602 respectively with one end of six elastic pressure drag unit 3
Corresponding.
On the reeded lower elastic polymer substrate 5 of band of the present invention, the groove of each layout capacitor cell 4 is respectively
Adjacent but do not connect with the groove arranging six elastic pressure drag unit 3；Arrange that the groove center of capacitor cell 4 processes a through hole,
The diameter of through hole is identical with the diameter of central contact electrode 601, arranges that the groove two ends of elastic pressure drag unit 3 process one respectively and lead to
Hole, the diameter of through hole is identical with the diameter of peripheral contact electrode 602；Ensure the central contact electrode 601 on lower flexible PCB 6
Through hole corresponding on lower elastic polymer substrate 5 contacts with capacitor cell 4, and peripheral contact electrode 602 is through lower elastic high
Through hole corresponding on molecule substrate 5 and elastic pressure drag unit ends contact, it is achieved the connection of circuit.
The capacitor cell 4 being arranged in lower elastic polymer substrate 5 groove of the present invention includes lower sensitive electrical pole plate
403, intermediate dielectric 402, upper sensitive electrical pole plate 401；Elastic pressure drag unit 3 as sensing unit, is used note by conductive rubber
Conductive rubber is poured on lower elastic polymer substrate 5 in the groove of elastic pressure drag unit 3 correspondence by the method penetrating molding, constitutes
Netted sensor array.
Upper elastic polymer substrate 2 of the present invention has and capacitor cell 4 groove one to one, and groove center adds
Work has through hole；Netted sensor array structure is isolated by upper elastic polymer substrate 2 with upper flexible PCB 1, plays protection netted
The effect of sensor array structure.
Electrode 101 is contacted with the through hole on upper elastic polymer substrate 2 one by one on upper flexible PCB 1 of the present invention
Corresponding so that the contact electrode 101 on upper flexible PCB 1 keeps through the upper sensitive electrical pole plate 401 of through hole with capacitor cell 4
The most stable contact.
Capacitor cell 4 of the present invention is dismountable, if wanting to record more multiple solutions parameter, can be replaced by capacitor cell 4
It is changed to other sensing units, such as temperature sensing unit, humidity sensing unit, vibrating sensing unit；The sensing unit replaced is same
Can be connected with external circuit by the contact electrode of upper and lower flexible PCB.
As it is shown in figure 9, the measuring principle of the present invention is: record each node (center of capacitor cell) by capacitor cell 4
Pressure size, be i.e. perpendicular to the pressure size in capacitor cell sensitive electrical pole plate direction, utilize that each capacitor cell 4 is adjacent six
Individual elastic deflection measured by pressure drag unit 3 obtains the three-dimensional coordinate of each node, as shown in Figure 10: electric capacity list after interface deformation
The three-dimensional coordinate of unit A can be by elastic pressure drag unit a1, and the deflection of a2, a3 and the initial three-dimensional coordinate of capacitor cell A solve
Obtain；The three-dimensional coordinate of electric capacity A after interface deformation is as the deformation reference coordinate initial point of capacitor cell B, electric after interface deformation
The three-dimensional coordinate holding unit B equally can be by elastic pressure drag unit b1, the deflection of b2, b3 and the initial three-dimensional of capacitor cell B
Coordinate solves and obtains；Therefore, can move towards to obtain the three-dimensional coordinate of each node by the arrow of Figure 10, obtain finally by interpolation fitting
The three-D profile curved surface (i.e. the three-dimension deformation-quantity at interface) at interface, the space side of each node pressure on three-D profile curved surface
To being perpendicular to the incisal plane of this node, thus can get the three-dimensional pressure of each node.
By measurement result is carried out data analysis, obtain three-dimensional pressure gradient figure, redesign the biography becoming distribution density
Sense cell array；The position that gradient is big is rationally increased sensing unit quantity and puies forward the spatial resolution of height measuring system further,
Make the data recorded more accurate, sensing unit quantity can reasonably be reduced to reduce measurement system in the position that gradient is less
Cost.
Claims (7)
1. the sensor array that can realize three-dimension deformation-quantity and the measurement of three-dimensional pressure high-precise synchronization, it is characterised in that: include
Lower flexible PCB, carries reeded lower elastic polymer substrate, arranges capacitor cell in a groove and elastic pressure drag unit
Array, upper elastic polymer substrate, upper flexible PCB；Capacitor cell reticulates sensor array knot with elastic pressure drag unit collection
Structure, the most each capacitor cell and six elastic pressure drag unit are adjacent.
A kind of sensing battle array realizing three-dimension deformation-quantity and the measurement of three-dimensional pressure high-precise synchronization the most according to claim 1
Row, it is characterised in that: described the central contact electrode on lower flexible PCB, peripheral contact electrode are protruding column shape, often
Individual central contact electrode and six adjacent peripheral contact electrodes constitute contact electrode group, wherein central contact electrode and an electric capacity
Unit is corresponding, and six peripheral contact electrodes are corresponding with one end of six elastic pressure drag unit respectively.
A kind of sensing battle array realizing three-dimension deformation-quantity and the measurement of three-dimensional pressure high-precise synchronization the most according to claim 1
Row, it is characterised in that: on the reeded lower elastic polymer substrate of described band, the groove of each layout capacitor cell respectively with
The groove arranging six elastic pressure drag unit is adjacent but does not connects；Arrange that the groove center of capacitor cell processes a through hole, through hole
Diameter identical with the diameter of central contact electrode, arrange that the groove two ends of elastic pressure drag unit process a through hole, through hole respectively
Diameter identical with the diameter of peripheral contact electrode；Ensure that the central contact electrode on lower flexible PCB is through lower elastic high score
Through hole corresponding on submounts contacts with capacitor cell, and peripheral contact electrode is through through hole corresponding on lower elastic polymer substrate
With elastic pressure drag unit ends contact, it is achieved the connection of circuit.
A kind of sensing battle array realizing three-dimension deformation-quantity and the measurement of three-dimensional pressure high-precise synchronization the most according to claim 1
Row, it is characterised in that: under described being arranged in, the capacitor cell in elastic polymer substrate recess includes lower sensitive electrical pole plate, in
Between electrolyte, upper sensitive electrical pole plate；Elastic pressure drag unit as sensing unit, is used injection molding method to incite somebody to action by conductive rubber
Conductive rubber is poured on lower elastic polymer substrate in the groove that elastic pressure drag unit is corresponding, constitutes netted sensor array.
A kind of sensing battle array realizing three-dimension deformation-quantity and the measurement of three-dimensional pressure high-precise synchronization the most according to claim 1
Row, it is characterised in that: described upper elastic polymer substrate has and capacitor cell groove one to one, and groove center processing
There is through hole；Netted sensor array structure is isolated by upper elastic polymer substrate with upper flexible PCB, plays the netted sensing of protection
The effect of array structure.
A kind of sensing battle array realizing three-dimension deformation-quantity and the measurement of three-dimensional pressure high-precise synchronization the most according to claim 1
Row, it is characterised in that: contact electrode and the through hole one_to_one corresponding on upper elastic polymer substrate on described upper flexible PCB,
Make the contact electrode on flexible PCB through upper sensitive electrical pole plate the most stable the connecing of holding of through hole with capacitor cell
Touch.
A kind of sensing battle array realizing three-dimension deformation-quantity and the measurement of three-dimensional pressure high-precise synchronization the most according to claim 1
Row, it is characterised in that: described capacitor cell is dismountable, if wanting to record more multiple solutions parameter, can be replaced by capacitor cell
For other sensing units, such as temperature sensing unit, humidity sensing unit, vibrating sensing unit；The sensing unit replaced equally may be used
It is connected with external circuit by the contact electrode of upper and lower flexible PCB.
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| CN113137910A (en) * | 2020-01-19 | 2021-07-20 | 华一声学股份有限公司 | Composite film sensor |
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