CN1614417A - Multifunctional measuring method and device for flexible material bending fatigue - Google Patents
Multifunctional measuring method and device for flexible material bending fatigue Download PDFInfo
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- CN1614417A CN1614417A CN 200410067529 CN200410067529A CN1614417A CN 1614417 A CN1614417 A CN 1614417A CN 200410067529 CN200410067529 CN 200410067529 CN 200410067529 A CN200410067529 A CN 200410067529A CN 1614417 A CN1614417 A CN 1614417A
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Abstract
A detection device adds four temperature transducers, four electrodes and resistance measuring unit on positioning needle and clamp head of device stipulated in application number 200410053598.7 as well as adds data collection card, measuring module, etc. The detection method includes using bending point temperature obtained by heating or cooling to pressure sample flextual fatigue at different temperature and measuring heat and electric conduction property between sample points under the flexural fatigue action.
Description
Technical field:
The present invention is multifunctional measuring method and the device in a kind of flexible material bending fatigue, the original position, the multiple measurement technology that relate to mechanics, calorifics and electric property in the flexible material bending fatigue are applicable to the sign of fiber, yarn, film, fabric and compound substance thereof.
Background technology:
The material fatigue that bends at a certain temperature, its mechanics, calorifics, electric property performance are different, and this is material combination property and interactive embodiment.Single performance in the past characterizes and measuring method can not adapt to people's understanding requirement essential and changing features under environmental baseline to material, and the characterization technique of former bit pattern has become the necessary technology of material property integrality, specific aim understanding.
But because the unicity and the limitation of this type of proving installation, research work often is confined to normal condition, as the test of material performance under the conditions such as constant temperature or room temperature.As need material is carried out a plurality of index researchs under certain specific environment, usually be after material is carried out this condition processing earlier, take out test respectively again, can not realize original position at desired conditions, instant test, saying nothing of has been the comprehensive in site measurement of several indexs, so that test result and actual conditions have more is biased.
At flexible material bending fatigue proving installation (Chinese invention patent, Yu Weidong, Liu Xiaoyan, a kind of bending fatigue device for measuring properties that is used for flexible material, application number 200410053598.7) in, introduced the research work of bending fatigue test device, this device, comprise that contains a control Driver Circuit, image pick-up card, data collecting card, measured data is handled the computing machine and the power that links to each other with this computing machine with calculation procedure in real time, displacement transducer, image pick-up device and stepper motor, but the force transducer that centering is moved, displacement transducer, hang on the upper grip of this force transducer, fine-tuning location holder, but coaxial rotation lower chuck, connect the crank mechanism of tooth bar one end and, place the optics center support system of lower chuck side to constitute by the rolling disc of tooth bar transmission; Described optics center support system constitutes measurement by parallel beam light source, hollow rotation axis, long confocal optical microscope head and image pick-up device; Described stepper motor is controlled by computing machine and can drives upper grip and move; Described upper grip is the chuck that hangs on center of gravity, weight symmetry, and finishes coaxial clamping to sample with lower chuck; Described lower chuck is by fixed pin location and be fastened on the rolling disc, and lower chuck and location holder are adjustable to the holding end center of fiber, and with the rotation that is as the criterion of the axial line of rolling disc.But, do not appear in the newspapers about the original position combination research of performance, calorifics and the electric property of material bending fatigue under temperature variation.But material in actual use, especially under the working environment of some special applications, should pay attention to the evaluation and the estimation of these combination properties especially.High temperature, charged, or low temperature, the material property of electric field action is arranged, and, all need strict composite behaviour and the in site measurement of considering material to the physical protection in the operation.
Summary of the invention:
The purpose of this invention is to provide multifunctional measuring method and device in a kind of flexible material bending fatigue, be used for the flexible material method and apparatus of bending fatigue and the multiple measurement of electrical and thermal conductivity original position thereof of having ready conditions, and be used for the combination in site measurement of material mechanics, calorifics, electric properties under temperature and electric field action such as fiber, yarn, fabric and film class.
Ultimate principle of the present invention is: adopt bending point place's heating or refrigeration and corresponding temperature to measure, or heating or the thermometric method of refrigeration and bending point place in temperature control the chamber in, the bending fatigue character of sign flexible material under the different temperatures effect.Simultaneously, temperature sensor and electrode are set everywhere, can express in the material bending fatigue heat conduction between these 4 and conductive features respectively and apply electric field at the upper and lower chuck of clamping sample and two pilot pins.
Described measuring method be the flexible material sample have ready conditions draw, power, heat, the original position of electrical properties, combination measurement method in the curved mechanism.Described flexible material is meant fiber, film, yarn and fabric; Described having ready conditions is meant temperature and electric field action; Described power is measured as the mobile stretching and the lower chuck of upper grip and finishes the application of force and measurement around the swing of a certain fixed point, can also give heat or added electric field, or carry out under the multiple compound action under independent power effect; Described thermal property measurement is to give heat by fixed point, or environment is given heat, or the application of force and apply electric field, or under the multiple compound action, measure the heat conductivility between bite and anchor point respectively, described electrical property is measured, be to apply electric field, or power, or heat, or the electric conductivity between material bite and location bending point is measured in multiple array mode effect down; When being meant the tired index under same sample, the similarity condition, lax index, thermal conductivity index and electric conductivity index, described original position, multiple measurement measure.
The present invention finishes this measuring method by being used for the have ready conditions device of bending fatigue and electrical and thermal conductivity multiple measurement thereof of flexible material, it is characterized in that at former bending fatigue device (Chinese invention patent, Yu Weidong, Liu Xiaoyan, a kind of bending fatigue device for measuring properties that is used for flexible material, application number 200410053598.7) on, sets up 4 temperature sensors, 4 electrodes and resistance measurement unit and temperature control chamber cover; Improved two pilot pins, increased heating or refrigeration, force measuring machine, and linked to each other, increased and measured, control relevant data collecting card and control survey module therewith, seen accompanying drawing 1～4 with computing machine.
Described 4 electrodes are loaded on respectively on upper grip 1, lower chuck 2, the two pilot pin 3, are 41,42,43 and 44, see attached Fig. 1 and 2.
Described 4 temperature sensors are loaded on respectively on upper grip 1, lower chuck 2, the two pilot pin 3, are 51,52,53 and 54, see attached Fig. 1 and 2.
Resistance between test 41-42 promptly obtains the vertical electric conductivity of material, and the resistance between test 43-44 obtains the material transverse conduction.Test 41-43 respectively, 41-44,42-43, the resistance between 42-44 can obtain the electric conductivity of segment section in the material.
Similar ground, test the temperature difference between 51-52 or keep the refrigeration of this temperature difference or heat power to obtain vertical thermal conductivity of material and heat flux, test the temperature difference between 53-54 or keep the refrigeration of this temperature difference or heat power to obtain material lateral thermal conductivity and heat flux.Test 51-53 respectively, 51-54,52-53, the thermal resistance between 52-54 can obtain the thermal conductivity of segment section in the material.
Improved pair of pilot pin 3 is to be made of lagging casing 31, metal conducting strip 32 and semiconductor refrigerating heat-producing machine 33, and is connected with former needle stand slide block.Move up and down and symmetrical clamping is moved by former mechanism, and the holding end central horizontal of the sample of lower chuck 2 is adjustable relatively, sees attached Fig. 1 and 2.
Described temperature control chamber cover 6 is detachable cylindrical shape temperature cover, is equipped with on it to add thermopair 7 and semiconductor refrigerating heat-producing machine 8.When need carry out temperature control to the bend specimen environment, or apply when adding the temperature field, it can be installed.As being room temperature, then can unload, see accompanying drawing 1 and 3.
To increase data collecting card be temperature data acquisition card and electrical property measurement data acquisition card, and the capture card of temperature control chamber case temperature sensor; Corresponding measurement control that is increased and data processing module are temperature data module and electrical performance data module.Newly-increased data collecting card links to each other with the resistance test circuit with temperature-control circuit with processing module with control, and links to each other with computing machine, sees accompanying drawing 4.
Computing machine and program controlled software thereof are finished driving, control, record, are observed and calculate, and finish the measurement of sample eigenwert in the temperature variation environment.
Characteristics of the present invention are:
A) actual environment that can simulation material uses, and can be accurately, all sidedly mechanics, electricity, the thermal property of material under this environment carried out the original position multiple measurement.
B) apparatus of the present invention function is reasonable, and resistance test is finished in electrode and resistance measurement unit, and temperature control chamber and temperature sensor carry out temperature control and heat conductivility test to material; Moving of pilot pin can be carried out the whole process detection to sample; Driving, control, computing system can be finished the tracking sample and move, and gather voluntarily and eigenvalue calculation.
C) apparatus of the present invention parts are simple, compact conformation; Light small and exquisite, be convenient to install and displacement.Not only have the feature of former contrive equipment, and increased function and controlled condition.
Description of drawings:
Fig. 1 is that the multifunction measuring set master of bending fatigue looks synoptic diagram;
Fig. 2 is the multifunction measuring set schematic side view of bending fatigue;
Fig. 3 is that apparatus of the present invention are looked synoptic diagram the master of former flexible material bending fatigue measurement mechanism;
Fig. 4 is data acquisition and Measurement and Control System block diagram (frame of broken lines is former mechanism).
Among the figure:
The two pilot pin 31-lagging casings of 1-upper grip 2-lower chuck 3-
32-metal conducting strip 33-semiconductor refrigerating heat-producing machine
41,42,43,44- electrode 51,52,53,54-temperature sensor
6-temperature control chamber cover 7-adds thermopair 8-semiconductor cooler
Embodiment:
To help to understand the present invention by following examples, but not limit content of the present invention.
Adopt device of the present invention, its structural representation such as attached Fig. 1 and 2.Earlier sample is sandwiched in upper grip 1, passes two pilot pins 3 of location holder, be sandwiched in lower chuck 2 then.Regulate the centering of upper grip 1, lower chuck 2 and two pilot pins 3, and adjust the centering clamping of two pilot pins 3.Meanwhile, start heating or refrigeration program, or give electric field, the manufacturing environment condition is carried out bending fatigue effect or bending then, measures bending fatigue, calorifics and the electric property of sample.
Embodiment 1: constant load ultimate fibre bending fatigue test result
The aramid fiber sample is sandwiched between upper grip 1 and the lower chuck 2, and passes two pilot pins 3 of location holder.Employing has apparatus of the present invention of temperature control chamber cover 6, sees accompanying drawing 1 and accompanying drawing 3.Carry out the measurement of fatigue lifetime.
The pretension of getting is 3cN, bent angle alpha=35 °, and the fatigue lifetime test result of aramid fiber (Twaron 2000) fiber under condition of different temperatures is:
Temperature (℃) fatigue lifetime (number of times)
0??????????9100????????9004????????8485????????8846????????8753
40?????????9780????????9320????????9516????????9627????????9871
100????????9805????????9765????????9569????????9638????????9721
Obviously, by data in the table as can be seen, environment temperature difference, fatigue performance difference.Fatigue durability is the poorest in the time of can finding 0 ℃, because material presents hard partially crisp feature.And the result difference of 40 ℃ and 100 ℃ is little, illustrates that in this temperature range the anti-bending fatigue difference of aramid fiber is little.
Embodiment 2: resistance measurement in the bending fatigue
Adopt the device identical, the wool fiber sample is sandwiched between upper grip 1 and the lower chuck 2, and passes two pilot pins 3 of locating holder with embodiment 1. Test 41 and 42 resistance and 43 and 44 resistance respectively, and change temperature control chamber case temperature.The actual measurement sample is between upper and lower chuck and the resistance variations between two pilot pin.
The resistivity measurements of water percentage 15% wool
Temperature (℃) resistance R (* 10 between 41-42
8Ω) the resistance R between 43-44 (* 10
5Ω)
63.12????60.91????64.65????69.82????59.49????60.05????62.38????59.89????62.74????66.85
20
10.15????11.22????10.81????9.79?????9.27?????11.26????10.29????10.49????9.56?????9.78
40
1.60?????1.76?????1.62?????1.64?????1.58?????1.58?????1.66?????1.62?????1.57?????1.65
60
Bigger than normal by the resistance value (resistance between 41-42) that fiber is vertically measured, because the clamping length of fiber is 20mm; The resistance value of fiber radial thickness direction (resistance between 43-44) is less than normal, because the thickness of fiber is 32 μ m, flattening thickness is 30 μ m.Difference obviously is that interelectrode distance causes.But Temperature Influence is tangible.
The measurement and the coefficient of heat conductivity of temperature difference between embodiment 3:4 point
Adopt the device identical, the dacron membrane sample is sandwiched between upper grip 1 and the lower chuck 2, and passes two pilot pins 3 of locating holder with embodiment 1.Test the temperature difference between 53-54 or keep the refrigeration of this temperature difference or heat power to obtain material lateral thermal conductivity and heat flux, environment temperature is controlled at 20 ± 1 ℃ by temperature control chamber cover 6; In two pilot pins 53 places refrigeration, two pilot pin 54 place's constant temperature or heat, the coefficient of heat conductivity that records the dacron membrane thickness direction under different temperature difference conditions is as follows:
The thickness direction coefficient of heat conductivity measured result of dacron membrane
| Environment temperature (℃) | Temperature difference (℃) | 53 temperature (℃) | 54 temperature (℃) | Coefficient of heat conductivity λ (Wm -1·℃ -1) | ||||
| ??20±1 | ????10 | ????10 | ????20 | ??0.084 | ??0.082 | ??0.078 | ??0.079 | ??0.081 |
| ????20 | ????0 | ????20 | ??0.086 | ??0.082 | ??0.085 | ??0.084 | ??0.082 | |
| ????40 | ????0 | ????40 | ??0.085 | ??0.086 | ??0.088 | ??0.086 | ??0.089 | |
Obviously, by data in the table as can be seen, temperature difference is influential to coefficient of heat conductivity, and temperature difference is big more, and coefficient of heat conductivity is big relatively more.
Claims (6)
1, the multifunctional measuring method in a kind of flexible material bending fatigue, it is characterized in that under temperature and electric field action, adopt sample bending point place's heating or refrigeration and corresponding temperature to measure, or test heating or the thermometric method of refrigeration and bending point place in the temperature control chamber, characterize the bending fatigue character of flexible material under temperature action; Simultaneously,, temperature sensor and electrode are set at the upper and lower chuck place of clamping sample and two pilot pin places everywhere, measure heat conduction and the conduction property between 4 respectively and apply electric field; Described measuring method is that sample is drawing, bending power, heat, the original position of electrical properties, combination measurement method in the mechanism; Described flexible material is meant fiber, film, yarn and fabric; Described having ready conditions is meant; When being meant indexs such as the fatigue under same sample, the similarity condition, lax, thermal conductivity and electric conductivity, described original position, multiple measurement measure.
2, device according to the described measuring method of claim 1, comprise that contains a control Driver Circuit, image pick-up card, data collecting card, measured data is handled the computing machine and the power that links to each other with this computing machine with calculation procedure in real time, displacement transducer, image pick-up device and stepper motor, but the force transducer that moves by centering, displacement transducer, hang on the upper grip of this force transducer, fine-tuning location holder, but coaxial rotation lower chuck, connect the crank mechanism of tooth bar one end and by the rolling disc of tooth bar transmission, place the optics center support system of lower chuck side to constitute, it is characterized in that also setting up 4 temperature sensors, 4 electrodes and resistance measurement unit, improved pair of pilot pin, force measuring machine, the temperature control chamber is covered and is linked to each other with the resistance test circuit with temperature-control circuit in addition, and the data collecting card that links to each other with computing machine and control survey module constitute, described pair of pilot pin is by lagging casing, metal conducting strip and semiconductor refrigerating heat-producing machine constitute, and are connected with former needle stand slide block.
3,, it is characterized in that described 4 temperature sensors are loaded on respectively on upper grip, lower chuck, the two pilot pin according to the described device of claim 2.
4,, it is characterized in that described 4 electrodes are loaded on respectively on upper grip, lower chuck, the two pilot pin according to the described device of claim 2.
5, according to the described device of claim 2, it is characterized in that described temperature control chamber cover being detachable cylindrical shape temperature cover, be equipped with on it and add thermopair and semiconductor cooler.
6,, it is characterized in that described data collecting card is the capture card of temperature data acquisition card, electrical property measurement data acquisition card and temperature control chamber case temperature sensor according to the described device of claim 2; Described control survey module is temperature data module and electrical performance data module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200410067529 CN1282876C (en) | 2004-10-27 | 2004-10-27 | Multifunctional measuring method and device for flexible material bending fatigue |
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|---|---|---|---|
| CN 200410067529 CN1282876C (en) | 2004-10-27 | 2004-10-27 | Multifunctional measuring method and device for flexible material bending fatigue |
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| CN1614417A true CN1614417A (en) | 2005-05-11 |
| CN1282876C CN1282876C (en) | 2006-11-01 |
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| CN100386619C (en) * | 2005-09-23 | 2008-05-07 | 东华大学 | Micro-measuring method, apparatus and use on microscope |
| CN101226163B (en) * | 2008-01-22 | 2010-11-10 | 西安交通大学 | Method for measuring metallic film fatigue life on a flexible substrate |
| CN101131382B (en) * | 2006-08-25 | 2010-12-01 | 中国科学院金属研究所 | System and method for testing performance of thin-film material under electricity/heat/force coupling action |
| CN101315362B (en) * | 2008-06-26 | 2011-06-22 | 太仓宏大纺织仪器有限公司 | Fabric specific resistance instrument, fabric resistor and fabric specific resistance measurement method |
| CN102364325A (en) * | 2011-10-09 | 2012-02-29 | 中国科学院金属研究所 | System and method for testing bending fatigue reliability of low dimensional conducting material |
| CN102445386A (en) * | 2011-10-10 | 2012-05-09 | 东华大学 | Microscale positioning holder for bending fatigue of fixed point of single fiber |
| CN101278193B (en) * | 2005-09-30 | 2012-08-22 | 材料技术股份有限公司 | Electrochemical fatigue sensor systems and methods |
| CN102692284A (en) * | 2012-06-15 | 2012-09-26 | 哈尔滨工业大学 | High-precision temperature measurement device for surface temperature of fatigue test sample |
| CN103149044A (en) * | 2013-02-22 | 2013-06-12 | 南京邮电大学 | Device for mechanical performance test of flexible device |
| CN103575759A (en) * | 2012-08-03 | 2014-02-12 | 香港纺织及成衣研发中心有限公司 | Compression and dynamic thermal transmission characteristic measurement equipment for flexible material and measurement method |
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| CN104777050A (en) * | 2015-04-17 | 2015-07-15 | 东北大学 | Low temperature bending and twisting tester and test method for variable resistance films |
| CN106841895A (en) * | 2016-12-27 | 2017-06-13 | 昆山国显光电有限公司 | A kind of RTA reliability test assembly of flexible display screen |
| CN107941139A (en) * | 2017-12-06 | 2018-04-20 | 中国建筑股份有限公司 | Scaffolding steel pipe bends quantitatively measuring device and its measuring method |
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- 2004-10-27 CN CN 200410067529 patent/CN1282876C/en not_active Expired - Fee Related
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| CN100386619C (en) * | 2005-09-23 | 2008-05-07 | 东华大学 | Micro-measuring method, apparatus and use on microscope |
| CN101278193B (en) * | 2005-09-30 | 2012-08-22 | 材料技术股份有限公司 | Electrochemical fatigue sensor systems and methods |
| CN101131382B (en) * | 2006-08-25 | 2010-12-01 | 中国科学院金属研究所 | System and method for testing performance of thin-film material under electricity/heat/force coupling action |
| CN101226163B (en) * | 2008-01-22 | 2010-11-10 | 西安交通大学 | Method for measuring metallic film fatigue life on a flexible substrate |
| CN101315362B (en) * | 2008-06-26 | 2011-06-22 | 太仓宏大纺织仪器有限公司 | Fabric specific resistance instrument, fabric resistor and fabric specific resistance measurement method |
| CN102364325A (en) * | 2011-10-09 | 2012-02-29 | 中国科学院金属研究所 | System and method for testing bending fatigue reliability of low dimensional conducting material |
| CN102364325B (en) * | 2011-10-09 | 2014-04-30 | 中国科学院金属研究所 | Method for testing bending fatigue reliability of low dimensional conducting material |
| CN102445386B (en) * | 2011-10-10 | 2014-02-26 | 东华大学 | Microscale positioning holder for bending fatigue of fixed point of single fiber |
| CN102445386A (en) * | 2011-10-10 | 2012-05-09 | 东华大学 | Microscale positioning holder for bending fatigue of fixed point of single fiber |
| CN102692284A (en) * | 2012-06-15 | 2012-09-26 | 哈尔滨工业大学 | High-precision temperature measurement device for surface temperature of fatigue test sample |
| CN102692284B (en) * | 2012-06-15 | 2013-12-25 | 哈尔滨工业大学 | High-precision temperature measurement device for surface temperature of fatigue test sample |
| CN103575759A (en) * | 2012-08-03 | 2014-02-12 | 香港纺织及成衣研发中心有限公司 | Compression and dynamic thermal transmission characteristic measurement equipment for flexible material and measurement method |
| CN103575759B (en) * | 2012-08-03 | 2015-12-02 | 香港纺织及成衣研发中心有限公司 | Flexible material compression dynamic thermal transmission characteristic measurement equipment and measuring method |
| CN103149044A (en) * | 2013-02-22 | 2013-06-12 | 南京邮电大学 | Device for mechanical performance test of flexible device |
| CN103149044B (en) * | 2013-02-22 | 2015-12-23 | 南京邮电大学 | A kind of device for mechanical performance test of flexible device |
| CN104062316A (en) * | 2014-07-09 | 2014-09-24 | 苏州大学 | Evaluation device for protection performance of textile |
| CN104777050A (en) * | 2015-04-17 | 2015-07-15 | 东北大学 | Low temperature bending and twisting tester and test method for variable resistance films |
| CN106841895A (en) * | 2016-12-27 | 2017-06-13 | 昆山国显光电有限公司 | A kind of RTA reliability test assembly of flexible display screen |
| CN107941139A (en) * | 2017-12-06 | 2018-04-20 | 中国建筑股份有限公司 | Scaffolding steel pipe bends quantitatively measuring device and its measuring method |
| CN109855967A (en) * | 2019-02-27 | 2019-06-07 | 太原理工大学 | A kind of fractured coal and rock compacting-sound emission-resistivity experimental provision and method |
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Assignee: Shanghai Zhongchen Digital Technic Apparatus Co., Ltd. Assignor: Donghua University Contract fulfillment period: 2008.9.1 to 2012.7.31 contract change Contract record no.: 2008310000056 Denomination of invention: Multifunctional measuring method and device for flexible material bending fatigue Granted publication date: 20061101 License type: Exclusive license Record date: 2008.9.18 |
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Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.9.1 TO 2012.7.31 Name of requester: SHANGHAI ZHONGCHEN DIGITAL TECHNOLOGY EQUIPMENT C Effective date: 20080918 |
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