CN102980693A - Two-stage calibration conversion method using viscous-elastic piezoresistive material to monitor stress variation after high-speed loading - Google Patents
Two-stage calibration conversion method using viscous-elastic piezoresistive material to monitor stress variation after high-speed loading Download PDFInfo
- Publication number
- CN102980693A CN102980693A CN2012104903893A CN201210490389A CN102980693A CN 102980693 A CN102980693 A CN 102980693A CN 2012104903893 A CN2012104903893 A CN 2012104903893A CN 201210490389 A CN201210490389 A CN 201210490389A CN 102980693 A CN102980693 A CN 102980693A
- Authority
- CN
- China
- Prior art keywords
- stress
- resistance
- viscoelasticity
- stage
- pressure drag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a two-stage calibration conversion method using a viscous-elastic piezoresistive material to monitor stress variations after high-speed loading and belongs to the technical field of measurement. The method reflects stress variations over time by using resistor variations over time. During calibration, resistor-stress-time characteristics at the loading stage and the deformation fixing stage can be obtained respectively, and corresponding conversion algorithms can be compiled respectively; and during monitoring, the stressed stage of the viscous-elastic piezoresistive material can be judged according to variations of a resistor, and stress values can be obtained through corresponding conversion algorithms. According to the monitoring method, different calibration methods and different conversion algorithms are used according to different stress states, and time factors are considered, so that adverse effects of loosening of the resistor made of the viscous-elastic piezoresistive material on stress monitoring can be eliminated.
Description
Technical field
The present invention relates to a kind of two-part with STRESS VARIATION behind the viscoelasticity pressure drag material monitoring High speed load and demarcate transformation approach, belong to field of measuring technique.
Background technology
A lot of modern industry substantial equipment all have narrow and small curved surface interlayer structure.The contact surface of both sides, interlayer gap can produce and relatively move, thereby usually adds the good viscoelasticity film of damping property at interlayer.During the equipment operation, this layer viscoelastic material is in the deformation stationary state for a long time after by High speed load.For guaranteeing security of system work, need the Real-Time Monitoring inter-laminar stress.But the narrow and small and surface in contact in interlayer gap is irregular, brings difficulty for the installation of conventional rigid sensor, so in the urgent need to a kind of sensor of low profile flexible, can be attached on the contact surface submissively, finishes the stress monitoring task.
Conductive polymer composite resistance is regular under external force to be changed, and has good pliability and workability, so can be used as the sensitive material of flexible sensor for measuring bit shift.Therefore this material also has good damping property, will place based on the flexible sensor of this pressure sensitive among the curved surface interlayer structure, not only can complete layer between the stress monitoring task, can also play the protective effect of damping, buffering.
Yet, this compound substance is a kind of viscoelastic material with macromolecular chain segment structure, deformation fixedly the stage have a resistance laxly, this phenomenon has seriously reduced monitoring accuracy, its basic reason is: all do not consider time factor when obtaining nominal data and writing transfer algorithm.Because also very not deep and perfect to conductive polymer composite resistance-stress-strain-time characteristic and research on mechanism both at home and abroad at present, therefore, impact how to eliminate resistance lax pair monitoring accuracy is a difficult problem of needing at present solution badly.
Summary of the invention
The objective of the invention is in order to overcome the weak point of existing invention, propose a kind of two-part with STRESS VARIATION behind the viscoelasticity pressure drag material monitoring High speed load and demarcate transformation approach, be used for solving the difficult problem of viscoelasticity base stress monitoring between lth layer.Two-part with STRESS VARIATION behind the viscoelasticity pressure drag material monitoring High speed load of the present invention is demarcated transformation approach, it is characterized in that, this process may further comprise the steps: (1), to viscoelasticity pressure drag material High speed load to a certain deformation, stress and resistance value in the record loading procedure, and then obtain load phase stress and resistance corresponding relation; (2), fixing stage of the deformation after loading is finished, record each stress and resistance value constantly, and then obtain this stage stress, resistance and the corresponding relation of time; (3) if the difference of certain resistance that constantly detects and upper one resistance that constantly detects surpasses setting threshold, then show the viscoelasticity pressure drag material is loaded, otherwise show that the viscoelasticity pressure drag material is in fixing stage of deformation; (4) if carving at a time, affirmation viscoelasticity pressure drag material is in load phase, then at first utilize look-up table, determine the interval at the resistance value place in this moment, then utilize the stress and the resistance corresponding relation that obtain in the step (1), obtain the stress value of load phase; (5) if confirming that the viscoelasticity pressure drag material is carved at a time is in fixing stage of deformation, then utilize the corresponding relation of the stress, resistance and the time that obtain in the resistance value in this moment and the step (2), obtain the stress value in this moment.
Characteristics of the present invention and effect
1, the two-part of STRESS VARIATION is demarcated transformation approach behind the usefulness viscoelasticity pressure drag material monitoring High speed load of the present invention's proposition, it is characterized in that this method is not only lax unconstrained to resistance, utilizes on the contrary it to finish stress measurement.
2, the two-part of STRESS VARIATION is demarcated transformation approach behind as claimed in claim the usefulness viscoelasticity pressure drag material monitoring High speed load, it is characterized in that, it is lax to reduce resistance not add nanometer powder in the matrix, thereby has guaranteed the pliability of pressure sensitive.
3, the two-part of STRESS VARIATION is demarcated transformation approach behind as claimed in claim the usefulness viscoelasticity pressure drag material monitoring High speed load, it is characterized in that, when demarcating and writing algorithm, all consider time factor, thereby fundamentally solved the adverse effect of resistance lax pair stress monitoring precision and response speed.
4, the two-part of STRESS VARIATION is demarcated transformation approach behind as claimed in claim the usefulness viscoelasticity pressure drag material monitoring High speed load, it is characterized in that, difference according to the sensitive material stress, obtain two cover nominal datas, write two cover transfer algorithms, and considered time factor, thereby improved the stress monitoring precision.
Embodiment
In calibration process, respectively to load phase and deformation fixedly the stage demarcate, and write corresponding transfer algorithm; In observation process, at first by the variation of resistance, determine the residing stressed stage of pressure drag material, then utilize corresponding nominal data and transfer algorithm to obtain each stress value constantly.
1, nominal data is obtained
(1), to viscoelasticity pressure drag material High speed load to a certain deformation, stress and resistance data in the record loading procedure obtain the nominal data of load phase, N
1Group stress and resistance calibration data are respectively P[T (i)] and R[T (i)], i=0,1,2, N
1-1.
(2), in fixing stage of deformation, stress and the resistance data of record t≤T before constantly, the obtain deformation fixing nominal data in stage.N
2Group stress and resistance calibration data are respectively σ [t (j)] and r[(t (j)], j=0,1,2, N
2-1, t (N
2-1)=T.And then the nominal data that obtains relative resistance and relative stress is respectively:
σ′[t(j)]＝σ[t(j)]/σ[t(0)] (1)
r′[t(j)]＝r[t(j)]/r[t(0)] (2)
In the formula, σ [(t (0)] and r[(t (0)] be respectively deformation fixedly stress and the resistance value of initial time.
Relative stress changing value Δ σ ' [t (j)] and relative resistance change value Δ r ' [(t (j)] be respectively:
Δσ′[t(j)]＝1-σ′[t(j)] (3)
Δr′[t(j)]＝1-r′[t(j)] (4)
Stress and resistance corresponding relation are with the ratio k[t (j) of Δ σ ' [t (j)] and Δ r ' [(t (j)]] describe.
During t≤T: k (t)=Δ σ ' [t (j)]/Δ r ' [t (j)], t (j-1)＜t≤t (j) (5)
During t＞T: k (t)=2k[t (N
2-1+n)]-k[t (N
2-2+n)], t (N
2-1+n)＜t≤t (N
2+ n), and n=0,1,2 ... (6)
2, pressure drag signal conversion
Obtain viscoelasticity pressure drag material resistance by signal acquiring system, establish the resistance that r (t) detects constantly for t, the resistance that r (t ') detected for the t ' moment of t before the moment.
[if r (t)-r (t ')] 〉=A (threshold value that A judges whether to have carried out load operation for being used for of determining according to experiment, A＞0), then show pressure drag material has been carried out load operation, utilize look-up table, determine between r (t) location, if R[T (i-1)]＜r (t)＜R[T (i)], the nominal data of recycling load phase obtains stress value σ (t) and is:
σ(t)＝P[T(0)]+{r(t)-R[T(0)]}×{P[T(i)]-P[T(0)]}×{R[T(i)]-R[T(0)]}
-1 (7)
If [r (t)-r (t ')]＜A shows that then the viscoelasticity pressure drag material is in fixing stage of deformation, the utilize deformation fixing nominal data in stage obtains relative stress value σ ' and (t) is:
σ′(t)＝1-k(t)×[1-r′(t)] (8)
In the formula, r ' is t relative resistance constantly (t).
At last, by relative stress value σ ' (t) with deformation fixedly the stress value of stage initial time obtain the stress value in t moment.
Claims (1)
1. the two-part with STRESS VARIATION behind the viscoelasticity pressure drag material monitoring High speed load is demarcated transformation approach, it is characterized in that, the method may further comprise the steps: (1), to viscoelasticity pressure drag material High speed load to a certain deformation, record stress and resistance value in the loading procedure, and then obtain stress and the resistance corresponding relation of load phase; (2), fixing stage of the deformation after loading is finished, record each stress and resistance value constantly, and then obtain this stage stress, resistance and the corresponding relation of time; (3) if the difference of certain resistance that constantly detects and upper one resistance that constantly detects surpasses setting threshold, then show the viscoelasticity pressure drag material is loaded, otherwise show that the viscoelasticity pressure drag material is in fixing stage of deformation; (4) if carving at a time, affirmation viscoelasticity pressure drag material is in load phase, then at first utilize look-up table, determine the interval at the resistance value place in this moment, then utilize the stress and the resistance corresponding relation that obtain in the step (1), obtain the stress value of load phase; (5) if confirming that the viscoelasticity pressure drag material is carved at a time is in fixing stage of deformation, then utilize the corresponding relation of the stress, resistance and the time that obtain in the resistance value in this moment and the step (2), obtain the stress value in this moment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104903893A CN102980693A (en) | 2012-11-21 | 2012-11-21 | Two-stage calibration conversion method using viscous-elastic piezoresistive material to monitor stress variation after high-speed loading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104903893A CN102980693A (en) | 2012-11-21 | 2012-11-21 | Two-stage calibration conversion method using viscous-elastic piezoresistive material to monitor stress variation after high-speed loading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102980693A true CN102980693A (en) | 2013-03-20 |
Family
ID=47854919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104903893A Pending CN102980693A (en) | 2012-11-21 | 2012-11-21 | Two-stage calibration conversion method using viscous-elastic piezoresistive material to monitor stress variation after high-speed loading |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102980693A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983400A (en) * | 2014-05-14 | 2014-08-13 | 西安热工研究院有限公司 | All-powerful detecting device and method for stress-strain instrument |
| CN115032155A (en) * | 2022-06-22 | 2022-09-09 | 西安交通大学 | Device and method for optically characterizing relaxation process of polymer material containing dynamic bond |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1339433A (en) * | 1969-11-28 | 1973-12-05 | Goodrich Co B F | Impulse torque decay test insbrument |
| CN1108389A (en) * | 1994-11-28 | 1995-09-13 | 沈阳工业大学 | Method for investigating critical value of plastical deformation of molding sand |
| CN101625351A (en) * | 2008-07-08 | 2010-01-13 | 华东理工大学 | Method for converting creep data into material high-temperature stress relaxation data |
| CN101968412A (en) * | 2010-10-21 | 2011-02-09 | 天津大学 | Device for measuring dynamic strain and method thereof |
-
2012
- 2012-11-21 CN CN2012104903893A patent/CN102980693A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1339433A (en) * | 1969-11-28 | 1973-12-05 | Goodrich Co B F | Impulse torque decay test insbrument |
| CN1108389A (en) * | 1994-11-28 | 1995-09-13 | 沈阳工业大学 | Method for investigating critical value of plastical deformation of molding sand |
| CN101625351A (en) * | 2008-07-08 | 2010-01-13 | 华东理工大学 | Method for converting creep data into material high-temperature stress relaxation data |
| CN101968412A (en) * | 2010-10-21 | 2011-02-09 | 天津大学 | Device for measuring dynamic strain and method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 陈铃: "硅橡胶/纳米石墨薄片复合材料在压力场作用下电导非线性研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983400A (en) * | 2014-05-14 | 2014-08-13 | 西安热工研究院有限公司 | All-powerful detecting device and method for stress-strain instrument |
| CN103983400B (en) * | 2014-05-14 | 2016-03-02 | 西安热工研究院有限公司 | A kind of ess-strain instrument Universal detection device and method |
| CN115032155A (en) * | 2022-06-22 | 2022-09-09 | 西安交通大学 | Device and method for optically characterizing relaxation process of polymer material containing dynamic bond |
| CN115032155B (en) * | 2022-06-22 | 2024-10-01 | 西安交通大学 | Device and method for optically characterizing relaxation process of polymer material containing dynamic bonds |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102564557B (en) | Build-up force standard machine with wide range, | |
| WO2008076601B1 (en) | Determining physical property of substrate | |
| JP2012527292A5 (en) | ||
| CN203964841U (en) | Conical surface depth detection instrument | |
| CN102980693A (en) | Two-stage calibration conversion method using viscous-elastic piezoresistive material to monitor stress variation after high-speed loading | |
| WO2012040017A3 (en) | Apparatus and methods for automatically testing a servo gauge in an inventory management system | |
| CN102252581A (en) | Shaft key groove depth detection tool | |
| CN103557837A (en) | On-line tower inclination monitoring method capable of correcting installation error of sensor | |
| CN102494959A (en) | Method for automatically measuring elongation rate of metal test sample under high temperature state | |
| CN101975544B (en) | Displacement measurement method based on resistance creep of composite conductive polymer pressure sensitive material | |
| CN106908474B (en) | Utilize the method for carbon nanometer paper sensor monitoring polymer based composites curing degree | |
| CN204405045U (en) | Sample thickness measurement mechanism | |
| CN101762422B (en) | Tensile testing method of tensile testing machine | |
| WO2008071436A8 (en) | Method of measuring the tensile stressing of a moving web | |
| EP1933109A3 (en) | Displacement measuring tool | |
| CN105333844B (en) | Riveting spot size detection online rapid measurement device and riveting point measuring method | |
| Bailey et al. | Application of strain-controlled fatigue testing methods to polymer matrix composites | |
| WO2008146532A1 (en) | Method for measuring stress in structure, and method and system for measuring distortion of object to be measured | |
| CN201803816U (en) | Combined transducer force-measuring device | |
| WO2015105286A1 (en) | Wheel processing apparatus and method using spinning manner | |
| CN202748184U (en) | Automatic measurement and control system | |
| CN203876183U (en) | Injection molding machine control system | |
| CN210834453U (en) | Rubber plastic elongation tester | |
| WO2010022014A3 (en) | Processing of azimuthal resistivity data in a resistivity gradient | |
| CN205015007U (en) | Temperature pressure integral type tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130320 |