CN103575759B - Flexible material compression dynamic thermal transmission characteristic measurement equipment and measuring method - Google Patents
Flexible material compression dynamic thermal transmission characteristic measurement equipment and measuring method Download PDFInfo
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Abstract
The present invention relates to material behavior field of measuring technique, disclose flexible material compression dynamic thermal transmission characteristic measurement equipment and method.This measuring equipment comprises upper test platform (2) that chassis (1) for installing each parts and support (8), level install, lower test platform (3), stepper motor (6), compression measurement module, signal acquisition module and analysis and processing module; Described upper test platform (2) and stepper motor (6) are installed on described support (8), described compression measurement module is positioned at described lower test platform (3) below and supports lower test platform (3), the input end of described signal acquisition module connects the output terminal of each sensor respectively, and described signal acquisition module exports analysis and processing module input end described in termination.The compression of flexible material and heat transfer characteristic can be tested by the present invention on an instrument simultaneously, and then the dynamic change of heat transfer performance in the compression process that can be used for comprehensive evaluation flexible material.
Description
Technical field
The present invention relates to material behavior field of measuring technique, more particularly, relate to a kind of flexible material compression dynamic thermal transmission characteristic measurement equipment and method.
Background technology
The heat-moisture transfer of textile material and mechanical characteristic are the principal elements of the comfortableness determining human dressing, the raising that the appearance of a large amount of new function material of the progress along with technology and people require life, particularly to the raising that Comfort of Garment During Wearing requires, more and more need to measure the heat transfer characteristic of material in different distortion situation.
Famous scientist Kawabata pointed out on the basis of fiber, textile mechanics and objective examination's technology as far back as 1998, and realizing the optimal design of garment material quality and performance is the striving direction of 21 century.A collection of novel fabric also has the feel (as peach face, Silk sensation) etc. of certain specific type while the gloss with good pliability, drapability and grace.Peach face, grabs pile fabrics, usually and skin contact time show warm one side; And real silk and silk-like fabric are also usual along with nice and cool sensation except smooth sensation.So it is exactly when material and skin contact that the appearance of these some novel fabrics all brings a physical phenomenon, and it has special heat transfer characteristic.
As everyone knows, general physics is a kind of well insulation material with regard to disclosing static air.Material, being particularly applied in still air layer contained in its warming characteristic of material in textile garment field and fabric has close relationship.Down jackets are sitting on snowfield to have research to point out, if the warming characteristic of part in compression can drop to original 1/6. only had original 1/20 by its warming characteristic after being soaked.Therefore the heat preservation property of research material under pressure is to the design of function clothes, and particularly under extreme conditions the life condition of the mankind has the meaning of reality.Such as the most basic physical parameter is material thickness, and standard thickness is all the material thickness under some given pressure.This parameter in product design, particularly winter insulated cold wear design in widespread use.Therefore these traditional methods can not meet all requirements occurred in actual application well as mentioned above.
The existing a lot of report of measuring method of existing related materials mechanical property, the Fabric Style testers such as main use KES or FAST carry out Fabric Style Mechanics Performance Testing to it, and measurement fabric thickness, grammes per square metre, thickness and the structural parameters such as grammes per square metre ratio and thread count are analyzed.Meanwhile, a lot of research it is also proposed the deficiency that the mechanical characteristic of much new method to material measures to improve KES or FAST.Such as Chinese utility model patent, ZL00217564.9, reports a kind of arrangement for measuring bending property of yarn, ZL92220556.6, reports computer testing instrument for combined strong stretcher for multi-bunch raw silk.ZL200410066649 describes the combination measurement method and device that a kind of stretching for textile material, compression, bursting and thorn cut.
China textile industry standard FZ/T010546 proposes a series of measuring method with regard to the style of fabric, relates to the compression of fabric, bending, the measurement of the multinomial Mechanics of Machinery characteristic such as skin-friction force.
There is many standards especially in the measurement of material heat transfer characteristic, such as:
● the GB/T11048-2008 mensuration of thermal resistance and dampness " under the textile physiological comfort steady state conditions "
● the heat conducting standard test method of ASTMD1518-85 (Reapproved2003) textile material
● JISL1096-1999 general fabrics test method (attached explanation part)
● the measurement of heat-resisting and water-fast steam performance under ISO11092:1993 textile physiological effect steady state conditions
Contrast the measuring method of traditional flexible material heat transfer characteristic, be all in a given temperature range by measurement to the different physical parameter relevant to heat trnasfer (as, the temperature difference on two surfaces, maintain the power that certain surface temperature needs input, heat flux etc.) heat transfer characteristic of material is described.Common index has thermal resistance, thermal conductivity, warming rate etc.
But existing measuring method report is all carry out under constant material thickness.Lack a kind of measurement carrying out material heat transfer performance in material thickness variation process simultaneously also by apparatus and method that the compressor mechanical characteristic of material describes out in the lump.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides a kind of flexible material to compress dynamic thermal transmission characteristic measurement equipment and measuring method.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of flexible material compression dynamic thermal transmission characteristic measurement equipment, comprise the chassis for installing each parts and support, described support is loaded on described chassis, also comprise level install for control temperature and measure heat flux upper test platform and be positioned at immediately below described upper test platform for placing the lower test platform of sample, for the stepper motor driving described upper test platform to be in vertical motion, be installed on described chassis for measure material bear the compression measurement module of pressure, signal acquisition module and for data analysis, the analysis and processing module of figure display and index calculate, described upper test platform and stepper motor are installed on described support, described compression measurement module is positioned at below described lower test platform and also supports lower test platform, the input end of described signal acquisition module connects the output terminal of each sensor respectively, and described signal acquisition module exports analysis and processing module input end described in termination.
In flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention, described upper test platform comprises temperature measurement module, heating module and is positioned at the heat flux sensor for detecting contactant body heat stream bottom described upper test platform, and described upper temperature measurement module to be positioned at below described heating module and to connect in described heating module; Described upper test platform lower surface has a groove, and described heat flux sensor to be attached in described groove and to keep described upper test platform lower surface smooth.
In flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention, described lower test platform comprises a lower temperature measurement module corresponding with described upper temperature measurement module.
In flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention, described upper test platform and lower test platform side are equipped with the range sensor for measuring thickness of sample.
In flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention, described compression measurement module comprises three pressure transducers and spring, described pressure transducer upper surface is in same plane, described spring upper end supports described lower test platform, pressure transducer described in lower termination, and described lower test platform pressure is delivered on described pressure transducer.
In flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention, described pressure transducer has S type structure.
In flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention, described upper test platform lower surface is identical with described lower test platform upper surface area.
The present invention also provides the said equipment to measure the method for flexible material compression dynamic thermal transmission characteristic, comprises the following steps:
S1, open and adjust described flexible material compression dynamic thermal transmission characteristic measurement equipment, make it enter measurement standby condition;
S2, flexible material sample to be measured, and the sensing data real-time rendering material heat flux gathered according to described signal acquisition module by described analysis and processing module in time with the curve of material thickness variation;
S3, according to obtained curve, calculate each compression dynamic thermal transmission characteristic index of flexible material sample.
In flexible material compression dynamic thermal transmission characteristic measuring method of the present invention, in described step S1, described upper test platform is made to rise to extreme higher position, described lower test platform is in natural balanced state, the real time temperature of described upper test platform and lower test platform is obtained by described upper temperature measurement module and lower temperature measurement module, start the heating module of described upper test platform, the finishing temperature value arranging described upper test platform is higher than lower test platform temperature 2 DEG C-20 DEG C, motor speed is set simultaneously, system maximum pressure value, normal pressure value and tingling sensation critical pressure intensity values.
In flexible material compression dynamic thermal transmission characteristic measuring method of the present invention, in described step S2, the flexible material sample level equally large with described lower test platform upper surface area is seated on described lower test platform, described flexible material compression dynamic thermal transmission characteristic measurement equipment records the pressure now caused by flexible material sample and described lower test platform own wt automatically, and as pressure initial value, when described upper test platform and the lower test platform temperature difference reach setting value, on described under the driving of described stepper motor, test platform moves downward, and the flexible material being put in described lower test platform is compressed, when reaching range, stopping moves downward by described lower test platform, or after the system maximum pressure value reaching setting, described upper test platform stops continuing to move downward, and keep current state certain hour, then at the uniform velocity upwards promote with certain speed, motion process in certain frequency continuously to the heat flux of flexible material sample, material thickness, pressure, upper test platform and lower test platform temperature are measured.
In flexible material compression dynamic thermal transmission characteristic measuring method of the present invention, the downward compression travel lower limit of described upper test platform is 80mm, and its moving range is 0-80mm, and its movement velocity is within the scope of 0-20cm/s; After described platform stopping of going to toilet moves downward, keep halted state 10s; Be 10HZ to the heat flux of flexible material sample, material thickness, pressure, test platform temperature is measured up and down frequency.
Implement flexible material of the present invention compression dynamic thermal transmission characteristic measurement equipment and method, the heat transfer characteristic of material under different pressure can be obtained in single job, thus save time in a large number and manpower.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 and Fig. 2 is the structural representation of flexible material of the present invention compression dynamic thermal transmission characteristic measurement equipment;
Fig. 3 is flexible material of the present invention compression dynamic thermal transmission characteristic measurement equipment S type pressure sensor structure schematic diagram;
Fig. 4 is flexible material of the present invention compression dynamic thermal transmission characteristic measuring method overview flow chart;
Fig. 5 is the structural representation of flexible material of the present invention compression dynamic thermal transmission characteristic measurement equipment compression verification test subsystems;
Fig. 6 is the structural representation that flexible material of the present invention compression dynamic thermal transmission characteristic measurement equipment compression heat transmits test subsystems;
Fig. 7 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method compression curve index definition;
Fig. 8 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method hot-fluid-time curve index definition;
Fig. 9 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method PSI curve index definition (PSI curve is the differential of hot-fluid time curve);
The flexible material compression dynamic thermal transmission characteristic measurement equipment of Figure 10 invention and measuring method heat flux-thickness curve index definition;
Pressure--the thickness curve of Figure 11 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method first embodiment test sample looped fabric;
Heat flux--the time curve of Figure 12 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method first embodiment test sample looped fabric;
Heat flux--the time diffusion PSI curve of Figure 13 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method first embodiment test sample looped fabric;
Heat flux--the thickness curve of Figure 14 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method first embodiment test sample looped fabric;
Pressure--the thickness curve of Figure 15 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method second embodiment test sample woven fabric;
Heat flux--the time curve of Figure 16 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method second embodiment test sample woven fabric;
Heat flux--the time diffusion PSI curve of Figure 17 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method second embodiment test sample woven fabric;
Heat flux--the thickness curve of Figure 18 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method second embodiment test sample woven fabric;
Pressure--the thickness curve of Figure 19 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method the 3rd embodiment test sample nonwoven fabrics;
The flexible material compression dynamic thermal transmission characteristic measurement equipment of Figure 20 invention and heat flux--the time curve of measuring method the 3rd embodiment test sample nonwoven fabrics;
Heat flux--the time diffusion PSI curve of Figure 21 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method the 3rd embodiment test sample nonwoven fabrics;
Heat flux--the thickness curve of Figure 22 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method the 3rd embodiment test sample nonwoven fabrics;
Pressure--the thickness curve of Figure 23 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method the 4th embodiment test sample sponge;
Heat flux--the time curve of Figure 24 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method the 4th embodiment test sample sponge;
Heat flux--the time diffusion PSI curve of Figure 25 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method the 4th embodiment test sample sponge;
Heat flux--the thickness curve of Figure 26 flexible material compression dynamic thermal transmission characteristic measurement equipment of the present invention and measuring method the 4th embodiment test sample sponge.
Embodiment
For by the sharpening more such as object of the present invention, technical scheme, below in conjunction with, structural representation, the invention will be further elaborated for systematic parameter, test operation step and test flow chart.
Fig. 1 and Fig. 2 is the structural representation of flexible material of the present invention compression dynamic thermal transmission characteristic measurement equipment, instrument critical piece of the present invention comprises domain 1 and support 8 and upper test platform 2 and lower test platform 3, go up test platform 2 with can the heating module 9 of homogeneous heating simultaneously, and the control being subject to accurate stepper motor 6 makes it can controlled movement in the vertical direction, upper test platform 2 also has a heat flux sensor 11, may be used for the heat flux detecting contact object in real time.On passing through in test process, temperature measurement module 10 and lower temperature measurement module 12 guarantee that the temperature difference of upper and lower two temperature surfaces reaches a certain setting value, can set as required between 2 DEG C-20 DEG C, usually with 10 DEG C for preferred value.The area of upper and lower two test platforms can select different sizes as required.Be preferably 10cm × 10cm, platform needs horizontal setting.Distance between upper test platform 2 and lower test platform 3 is measured by a range sensor 7.Multiple existing displacement transducer with reference to also directly quoting, can be preferably high-precision laser displacement sensor in the present invention.
In order to obtain the characteristic of the change of pressure in flexible material pressurized process, lower test platform 3 is installed on an elastic support, produce pressure by disperse transmission three special pressure transducer 5 on.Stressed sum by these three sensors is cut the weight acquisition of spring 4 and lower test platform 3 and sample by the pressure of measured material.Use three pressure transducers 5 to be because three points can form a plane, and use resilient connection can eliminate the error that upper and lower two test platform measuring surface in mechanical erection process are not parallel or sample placement is out-of-level caused.Area due to measuring table is certain, and therefore, force value can convert pressure values easily to and express.In order to obtain high-precision pressure sensing, the pressure transducer 5 of particular design has the structure of S type, as shown in Figure 3, adopts foil gauge measuring technique to obtain the deflection caused due to pressurized.Existing foil gauge measuring technique can make reference at this and quote.
Systematic parameter:
1. preset the travel line speed 1mm/s of motor, range of choices 0-10mm/s;
2. preset the distance 50mm range of choices 0-80mm that sample traction platform lower wall is pressed down;
3. preset motor and coil the residence time 10s after pressing to predeterminable range (50mm), range of choices 0-600s on default sample traction platform;
4. spring 4 maximum deformation quantity can reach 60mm, maximal work load 150N;
5. laser ranging displacement sensor measurement range scope is 0-25mm, and precision can reach 10 μm;
6. two pieces of square copper coin area range of choices 8cm*8cm-12cm*12cm separately up and down of test traction platform, first-selected 10cm*10cm, the optional 1-3cm of copper plate thickness, first-selected 2cm;
7. test specimens is of a size of 10cm*10cm.
Test operation step: (see figure 4)
S1. open system power supply, opens computer testing software interface;
S2. if desired calibrate, enter system calibration menu, pick up calibration parameter is set, motor travelling speed, test depression distance, the parameters such as the motor residence time, otherwise enter step S3;
S3. single-click interface starts testing button, system beep device sends " dripping ", and two sound prompting tests start, now motor will reset, rear motor automatic traction test traction platform upper dish, according to setting speed uniform descent, declined along with upper dish by the sample of upper and lower two dish clampings, carry out data acquisition in real time at whole descending motion process Computer, and show curve;
S4. stop 10s when lower wall arrives predeterminable range rear motor, lower wall at the uniform velocity rises to initial position afterwards, and whole data acquisition is complete;
S5. according to fetched data, the automatic parameter of computing machine, after completing, system beep device sends " dripping ", and two sound prompting tests terminate;
S6. return step S1, test next time.
The structural representation of compression verification test subsystems in flexible material of the present invention compression dynamic thermal transmission characteristic measurement equipment as shown in Figure 5, Fig. 6 is the structural representation of flexible material of the present invention compression dynamic thermal transmission characteristic measurement equipment compression verification heat trnasfer test subsystems, the flexible material sample level equally large with lower test platform 3 upper surface area is seated on lower test platform 3, flexible material compression dynamic thermal transmission characteristic measurement equipment records the pressure now caused by flexible material sample and lower test platform 3 own wt automatically, and as pressure initial value, when upper test platform 2 reaches setting value with lower test platform 3 temperature difference, on under the driving of stepper motor 6, test platform 2 moves downward, and the flexible material being put in lower test platform 3 is compressed, when reaching range, stopping moves downward by lower test platform 3, or after the system maximum pressure value reaching setting, upper test platform 2 stops continuing to move downward, and keep current state certain hour, then at the uniform velocity upwards promote with certain speed, motion process in certain frequency continuously to the heat flux of flexible material sample, material thickness, pressure, upper test platform 2 and lower test platform 3 temperature are measured.
As shown in Figure 7, be the pressure-dependent performance graph of thickness of typical material.Comprise two stages in whole measuring process: the first stage is compression stage, the thickness of the continuous increase material along with pressure in this process constantly reduces the continuous change causing material heat transfer characteristic thus; Subordinate phase is recovery stage.Upper measuring table upwards promotes with a constant speed.Movement velocity is controlled within the scope of 0-10mm/s, preferred movement speed 1mm/s.Now material recovers the trend of former state because himself elastic characteristic has, and thus still to lower measuring table build-up of pressure.Therefore following Material compression characteristic can be obtained according to the relation in process between pressure and material thickness:
(1). thickness: the thickness of material under compression pressure different from rejuvenation.One-tenth-value thickness 1/10 particularly under certain some special pressure conditions;
D: the thickness (mm) of sample;
P: the pressure (gf/cm that sample bears
2);
D
0: be 0---5gf/cm at pressure
2time, the thickness (mm) of sample, preferred 0.5gf/cm
2;
Ds: the normal pressure (gf/cm of sample
2), the selected testing standard with reference to ASTMD1777-96 (2011)-textile material thickness of pressure;
Dm: the maximum pressure (gf/cm of sample
2) time sample thickness (mm); The selected classification with sample of maximum pressure is relevant.By default before measurement starts, the scope that arranges of this instrument is at 50gf/cm
2-500gf/cm
2, preferred 70gf/cm
2;
(2). work done during compression: pressure is increased to maximal value gradually in upper measuring table decline process, measuring table applies pressure to material and causes material thickness to change and work (gf*mm), that is: material pressure and fabric thickness reduce area under the curve that variable quantity surrounds;
(3). resilience merit: be gradually reduced to zero process from maximal value at pressure, namely goes up in the process of measuring table rising, material pressure and area under the curve that fabric thickness surrounds (gf*mm), namely;
(4). rebound degree: the ratio of resilience merit and work done during compression, namely;
(5). linear rate: the ratio of work done during compression and linear change power demand, namely;
(6). maximum compression modulus: be increased in maximal value process gradually at pressure, material pressure and fabric thickness surround rate of curve maximal value (gf/mm), namely;
(7). development of maximum resilient modulus: at pressure from maximal value to being gradually reduced to zero process, material pressure and fabric thickness surround rate of curve maximal value (gf/mm), namely;
As shown in Figure 8, for typically compressing and passing through the hot-fluid of material and the relation of time in Recovery Process.Time point t1, for upper measuring table just touches material, therefore produces hot-fluid and passes through material.Temperature due to measured material is that standard laboratory atmosphere temperature (normally 20 DEG C) is the same with the temperature of lower measuring table.The temperature difference is comparatively large, so the numerical value of hot-fluid is just with speed increase faster, and reaches maximum heat flow valuve in the short period of time.Research also shows that this characteristic feels to have very large associating with the cold and hot of people's everyday exposure.As time goes on material due to heat absorption own temperature will promote, therefore heat flux will reduce and reach heat absorption with heat radiation dynamic equilibrium point t2.After completing measurement, t3 is the time point that upper measuring table starts to rise, and along with the lifting of upper measuring table, the hot-fluid of leaving away of high temperature source can lower fast.Performance graph thus, can obtain following material heat transfer characteristic.
(8). maximum heat flow: through the heat flux maximal value (w/m of material in test process
2), namely in Fig. 8
(9). the duration (s) of thermal conditioning,
T
duration＝t
2-t
1
(10). material thermal conditioning ability (w/m
2):
The mean value (from t2 to t3, in Fig. 8) of hot-fluid during Qes equilibrium state
(11). thermal conditioning index relatively:
D|
tfor the thickness of t material
On basis discussed above, after the hot-fluid time curve differential shown in Fig. 8, obtain PSI curve, i.e. the physiological change intensity curve of temperature, as shown in Figure 9.Along with the rate of change of hot-fluid, obtain the physiological sensation change intensity PSI in compression process
downwith the physiological sensation change intensity PSI in Recovery Process
up.
(12). the physiological sensation change intensity (w*s/m of temperature in compression process
2), i.e. PSI
down
(13). the physiological sensation change intensity (w*s/m of temperature in Recovery Process
2), i.e. PSI
up
The curve of hot-fluid and material thickness variation in compression with rejuvenation can also be obtained, as shown in Figure 10 simultaneously.The heat transfer characteristic of material in difference compression situation can be obtained thus.
(14). the thermal resistance (m under material original depth
2dEG C */w):
Δ T|
tthe temperature difference on upper and lower two surfaces of t material in test process,
(15). the initial thermal conductivity coefficient (w*mm/ (m under material original depth
2* DEG C))
(16). the thermal resistance (m of material under maximum compression degree
2dEG C */w):
(17). the coefficient of heat conductivity of material under maximum compression degree (w*mm/ (m
2* DEG C):
(18). the material thermal resistance (m under compression process Plays thickness
2dEG C */w):
(19). the coefficient of heat conductivity (w*mm/ (m under compression process Plays thickness
2* DEG C)):
(20). the material thermal resistance (m under Recovery Process Plays thickness
2dEG C */w):
(21). the coefficient of heat conductivity (w*mm/ (m under Recovery Process Plays thickness
2* DEG C)):
The present invention is described in detail below in conjunction with preferred embodiment and accompanying drawing.
In the present invention based on sample traction platform (lower test platform 3), under the driving of stepper motor 6, the sample also compressing lower wall with certain speed (as 1mm/s) uniform descent gradually stays for some time as 10s by upper test platform 2 to maximum pressure, does at the uniform velocity upward movement afterwards until upper test platform 2 departs from sample and gets back to initial position.In whole motion process, the temperature that this testing tool Real-time Obtaining is relevant, mechanics and displacement signal, and the working time of automatic production record.After being completed, according to obtained data calculate can reflect test each index of selected sample thermal behavior and compression performance.
In order to evaluate the compression property of flexible material, heat transfer characteristic, and dynamic thermal transmission characteristic in compression process, the sample that have chosen thicker sponge, the looped fabric of intermediate gauge, general woven fabric and thinner nonwoven fabrics totally four kinds of different materials below is respectively tested.
Embodiment 1:
One piece of looped fabric test sample is laid in the lower wall of sample traction platform, opens computer testing software interface hit testing and start, system beep device sends " dripping ", and two sound prompting tests start.Now go up test platform 2 and start heating, until meet the upper and lower two dish temperature difference to reach 10 DEG C, drive link by being connected with leading screw makes upper dish with the speed uniform descent of 1mm/s by stepper motor 6, computing machine starts Real-time Obtaining and records upper lower burrs temperature, hot-fluid, the physical signalling such as pressure and pressure, and with curve form display, until meet pressure suffered by sample to reach the maximum pressure of setting as 70.3gf/cm
2, motor stalls keeps 10s.Motor reversal drives upper dish at the uniform velocity to rise to the speed of 1mm/s and touches upper limit position switch motor stalls afterwards, now system beep device send " dripping " two sound prompting test terminate.Test result curve is as shown in accompanying drawing 11-14.
Test index is as shown in the table
Embodiment 2:
One piece of woven fabric test sample is laid in the lower wall of sample traction platform, opens computer testing software interface hit testing and start, system beep device sends " dripping ", and two sound prompting tests start.Now go up dish and start heating, until meet the upper and lower two dish temperature difference to reach 10 DEG C, drive link by being connected with leading screw makes upper dish with the speed uniform descent of 1mm/s by stepper motor 6, computing machine starts Real-time Obtaining and records upper lower burrs temperature, hot-fluid, the physical signalling such as pressure and pressure, and show with curve form, until meet pressure suffered by sample to reach the maximum pressure of setting as 70.3gf/cm2, motor stalls keeps 10s.Motor reversal drives upper dish at the uniform velocity to rise to the speed of 1mm/s and touches upper limit position switch motor stalls afterwards, now system beep device send " dripping " two sound prompting test terminate.Test result such as accompanying drawing 15-18 shows.
Test index is as shown in the table
Embodiment 3:
One piece of nonwoven fabrics test sample is laid in the lower wall of sample traction platform, opens computer testing software interface hit testing and start, system beep device sends " dripping ", and two sound prompting tests start.Now go up dish and start heating, until meet the upper and lower two dish temperature difference to reach 10 DEG C, drive link by being connected with leading screw makes upper dish with the speed uniform descent of 1mm/s by stepper motor 6, computing machine starts Real-time Obtaining and records upper lower burrs temperature, hot-fluid, the physical signalling such as pressure and pressure, and show with curve form, until meet pressure suffered by sample to reach the maximum pressure of setting as 70.3gf/cm2, motor stalls keeps 10s.Motor reversal drives upper dish at the uniform velocity to rise to the speed of 1mm/s and touches upper limit position switch motor stalls afterwards, now system beep device send " dripping " two sound prompting test terminate.Test result is as accompanying drawing 19-22
Test index is as shown in the table
Embodiment 4:
One piece of sponge test sample is laid in the lower wall of sample traction platform, opens computer testing software interface hit testing and start, system beep device sends " dripping ", and two sound prompting tests start.Now go up dish and start heating, until meet the upper and lower two dish temperature difference to reach 10 DEG C, drive link by being connected with leading screw makes upper dish with the speed uniform descent of 1mm/s by stepper motor 6, computing machine starts Real-time Obtaining and records upper lower burrs temperature, hot-fluid, the physical signalling such as pressure and pressure, and show with curve form, until meet pressure suffered by sample to reach the maximum pressure of setting as 70.3gf/cm2, motor stalls keeps 10s.Motor reversal drives upper dish at the uniform velocity to rise to the speed of 1mm/s and touches upper limit position switch motor stalls afterwards, now system beep device send " dripping " two sound prompting test terminate.Test result such as accompanying drawing 23-26 shows.
Test index is as shown in the table
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, also can make a lot of form, these all belong within protection of the present invention.
Claims (10)
1. a flexible material compression dynamic thermal transmission characteristic measurement equipment, it is characterized in that, comprise the chassis (1) for installing each parts and support (8), described support (8) is loaded on described chassis (1), also comprise level install for control temperature and measure heat flux upper test platform (2) and be positioned at immediately below described upper test platform (2) for placing the lower test platform (3) of sample, for the stepper motor (6) driving described upper test platform (2) to be in vertical motion, be installed on described chassis (1) for measure material bear the compression measurement module of pressure, signal acquisition module and for data analysis, the analysis and processing module of figure display and index calculate, described upper test platform (2) and stepper motor (6) are installed on described support (8), described compression measurement module is positioned at described lower test platform (3) below and supports lower test platform (3), the input end of described signal acquisition module connects the output terminal of each sensor respectively, and described signal acquisition module exports analysis and processing module input end described in termination,
Described compression measurement module comprises three pressure transducers (5) and spring (4), described pressure transducer (5) upper surface is in same plane, described spring (4) upper end supports described lower test platform (3), pressure transducer (5) described in lower termination, and described lower test platform (3) pressure is delivered on described pressure transducer (5).
2. flexible material compression dynamic thermal transmission characteristic measurement equipment according to claim 1, it is characterized in that, described upper test platform (2) comprises temperature measurement module (10), heating module (9) and is positioned at the heat flux sensor (11) for detecting contactant body heat stream of described upper test platform (2) bottom, and described upper temperature measurement module (10) is positioned at described heating module (9) below and be connected with described heating module (9); Described upper test platform (2) lower surface has a groove, and described heat flux sensor (11) to be attached in described groove and to keep described upper test platform (2) lower surface smooth.
3. flexible material compression dynamic thermal transmission characteristic measurement equipment according to claim 1, it is characterized in that, described lower test platform (3) comprises a lower temperature measurement module (12) corresponding with described upper temperature measurement module (10).
4. flexible material compression dynamic thermal transmission characteristic measurement equipment according to claim 1, it is characterized in that, test platform (2) and lower test platform (3) side are equipped with the range sensor (7) for measuring thickness of sample on described.
5. flexible material compression dynamic thermal transmission characteristic measurement equipment according to claim 1, it is characterized in that, described pressure transducer (5) has S type structure.
6. flexible material compression dynamic thermal transmission characteristic measurement equipment according to claim 1, it is characterized in that, described upper test platform (2) lower surface is identical with described lower test platform (3) upper surface area.
7. use a flexible material compression dynamic thermal transmission characteristic measuring method for flexible material compression dynamic thermal transmission characteristic measurement equipment described in claim 1, it is characterized in that, comprise the following steps:
S1, open and adjust described flexible material compression dynamic thermal transmission characteristic measurement equipment, make it enter measurement standby condition;
S2, flexible material sample to be measured, and the sensing data real-time rendering material heat flux gathered according to described signal acquisition module by described analysis and processing module in time with the curve of material thickness variation;
S3, according to obtained curve, calculate each compression dynamic thermal transmission characteristic index of flexible material sample.
8. flexible material compression dynamic thermal transmission characteristic measuring method according to claim 7, it is characterized in that, in described step S1, described upper test platform (2) is made to rise to extreme higher position, described lower test platform (3) is in natural balanced state, the real time temperature of described upper test platform (2) and lower test platform (3) is obtained by described upper temperature measurement module (10) and lower temperature measurement module (12), start the heating module (9) of described upper test platform (2), the finishing temperature value arranging described upper test platform (2) is higher than lower test platform (3) temperature 2 DEG C-20 DEG C, motor speed is set simultaneously, system maximum pressure value, normal pressure value.
9. flexible material compression dynamic thermal transmission characteristic measuring method according to claim 7, it is characterized in that, in described step S2, the flexible material sample level equally large with described lower test platform (3) upper surface area is seated on described lower test platform (3), described flexible material compression dynamic thermal transmission characteristic measurement equipment records the pressure now caused by flexible material sample and described lower test platform (3) own wt automatically, and as pressure initial value, when described upper test platform (2) reaches setting value with lower test platform (3) temperature difference, under the driving of described stepper motor (6), described upper test platform (2) moves downward, and the flexible material being put in described lower test platform (3) is compressed, when reaching range, stopping moves downward by described lower test platform (3), or after the system maximum pressure value reaching setting, the stopping of described upper test platform (2) continues to move downward, and keep current state certain hour, then at the uniform velocity upwards promote with certain speed, motion process in certain frequency continuously to the heat flux of flexible material sample, material thickness, pressure, upper test platform (2) and lower test platform (3) temperature are measured.
10. flexible material compression dynamic thermal transmission characteristic measuring method according to claim 9, it is characterized in that, described upper test platform (2) downwards compression travel lower limit is 80mm, and its moving range is 0-80mm, and its movement velocity is within the scope of 0-20cm/s; After described upper test platform stopping moves downward, keep halted state 10s; Be 10HZ to the heat flux of flexible material sample, material thickness, pressure, test platform (3) temperature is measured up and down frequency.
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