CN103163066B - A kind of liquid machine loss analysis instrument - Google Patents
A kind of liquid machine loss analysis instrument Download PDFInfo
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- CN103163066B CN103163066B CN201310053283.1A CN201310053283A CN103163066B CN 103163066 B CN103163066 B CN 103163066B CN 201310053283 A CN201310053283 A CN 201310053283A CN 103163066 B CN103163066 B CN 103163066B
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- 239000007788 liquid Substances 0.000 title claims abstract description 53
- 238000004458 analytical method Methods 0.000 title claims abstract description 15
- 230000010355 oscillation Effects 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 39
- 230000007246 mechanism Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 abstract description 10
- 239000000523 sample Substances 0.000 description 32
- 239000011521 glass Substances 0.000 description 26
- 230000008859 change Effects 0.000 description 23
- 238000005259 measurement Methods 0.000 description 9
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 239000012071 phase Substances 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
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- 238000013461 design Methods 0.000 description 3
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- 238000002474 experimental method Methods 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
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- 238000000429 assembly Methods 0.000 description 1
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- 238000012512 characterization method Methods 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- VQMGPXKGNNEBLF-UHFFFAOYSA-N oxalonitrile 1-pentyl-2-phenylbenzene Chemical compound N#CC#N.C(CCCC)C1=C(C=CC=C1)C1=CC=CC=C1 VQMGPXKGNNEBLF-UHFFFAOYSA-N 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The present invention relates to surveying instrument technical field, be specifically related to a kind of liquid machine loss analysis instrument and control method thereof.Liquid machine loss analysis instrument of the present invention includes vacuum test system and control system, and wherein vacuum test system includes mechanical pump, vacuum (-tight) housing, recycle oil bath, coupon, fixed mechanism, starting of oscillation sheet, permanent magnet, thin slice, electromagnetic drive coil, LASER Light Source and differential photocell; Computer control system includes amplifying circuit, signal generator, A/D converter, department of computer science unify recycle oil bath thermostat.The present invention can measure the mechanical loss of liquid at each temperature spot automatically, and improves measuring accuracy.
Description
Technical field
The present invention relates to surveying instrument technical field, more specifically, relate to a kind of liquid machine loss analysis instrument and control method thereof.
Background technology
Liquid undergo phase transition or the change of character usually with viscoelastic change, so the research of the viscoelastic sign of liquid to liquid is significant.
The key instrument of current sign liquid viscoelasticity characteristic is flow graph, and flow graph mainly comprises 3 types: capillary rheometer, torque rheometer and dynamic rheometer.Use capillary rheometer or torsion type flow graph, be all make material pass through from instrument, to obtain the data of liquid viscosity and melt flows, but these two kinds of rheometry precision are poor, and for low viscous liquor sample, are more difficult to Measurement accuracy.Principle of work and above-mentioned two kinds of flow graphs of dynamic rotary type or oscillatory rheometer are different, and be placed on by fluid sample in two assemblies during use, one of them is fixed, another continuous rotation or do low-angle vibration.Dynamic rheometer has 3 kinds of different component patterns: cone-plate/flat, flat board/flat and concentric circles pillar, its ultimate principle is all apply shear stress by the motor with air bearing to fluid sample, measure the strain of sample, by calculating the data such as the viscosity of sample accordingly.But dynamic rheometer, because the shear-wave decay produced at liquor sample during kinetic measurement is very fast, and large with the motor inertia of air bearing, makes the stress of liquor sample (especially low-viscosity (mobile) liquid), strain is difficult to Measurement accuracy.Dynamic rheometer cone-plate/flat and dull and stereotyped/flat component pattern is not suitable for loading measures low-viscosity (mobile) liquid, although and concentric circles pillar can measure the parameter of low-viscosity (mobile) liquid comparatively accurately, need the amount of liquid that loads larger again.
Summary of the invention
Technical matters to be solved by this invention is that to overcome above-mentioned at least one described in the prior art not enough, provides a kind of and can automatically measure liquid mechanical loss and improve liquid machine loss analysis instrument and the control method thereof of measuring accuracy.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A kind of liquid machine loss analysis instrument, include vacuum test system and control system, described vacuum test system comprises test suite and the vacuum (-tight) housing for holding test suite; Described vacuum (-tight) housing is connected with aspiration pump;
Described test suite comprises recycle oil bath, the transparent coupon for splendid attire testing liquid, two electromagnetic drive coil, LASER Light Source and differential photocells; The upper and lower of described recycle oil bath is respectively equipped with entrance and exit; Described coupon opening upwards is arranged, and its underpart and recycle oil bath are tightly connected; Be provided with starting of oscillation sheet in described coupon, the openend of coupon is fixed in described starting of oscillation sheet upper end by fixed mechanism, and lower end is connected with the ganoid thin slice for being inserted in testing liquid; Described starting of oscillation sheet is provided with permanent magnet; Described two electromagnetic drive coil are located at two side positions of coupon above recycle oil bath, and described permanent magnet south poles is on the line of centres of two electromagnetic drive coil; The face normal direction of described starting of oscillation sheet is mutually vertical with the face normal direction of thin slice, and LASER Light Source, starting of oscillation sheet and differential photocell set gradually on the same line in order, the direction of vibration place plane orthogonal of three's line and starting of oscillation sheet;
Described control system includes amplifying circuit, signal generator, A/D converter, department of computer science unify recycle oil bath thermostat, described A/D converter is connected with computer system, signal generator and amplifying circuit respectively, described signal generator is connected with two electromagnetic drive coil, and described differential photocell is connected with amplifying circuit; Computer system is connected with recycle oil bath thermostat, and described recycle oil bath thermostat is connected with the entrance and exit of recycle oil bath respectively.
A control method for above-mentioned liquid machine loss analysis instrument, comprises the steps:
S1. by liquor sample splendid attire in coupon;
S2. by computer system control recycle oil bath thermostat, recycle oil bath is heated/is cooled to design temperature;
S3. described signal generator is by computer system control, sine wave output signal gives two electromagnetic drive coil, to encourage permanent magnet to vibrate, this sine wave signal is input to A/D converter as the stress signal of starting of oscillation sheet, and permanent magnet drives starting of oscillation sheet to vibrate together with thin slice; The hot spot that what LASER Light Source produced on differential photocell have starting of oscillation sheet to project, as output signal, is input to and sends computer system as the strain signal of starting of oscillation sheet to by A/D converter after amplifying circuit amplifies and store;
S4. calculated the phasic difference of strain signal counter stress signal by computer system, characterize the mechanical loss of liquid with this.
Liquid machine loss analysis instrument of the present invention, by the automatic control of control system, achieves the object automatically measuring liquid machine loss.Different by applying shear stress with the motor of air bearing to fluid sample from prior art, the present invention is with the vibration of electromagnetic drive coil excitation permanent magnet, the thin glass sheet on starting of oscillation sheet is made to apply shear stress to fluid sample, the inertia of vibrational system greatly reduces, substantially increase the measuring accuracy of liquor sample stress, strain, the amount of liquid of loading only needs 1-2ml.Only need the change of the phasic difference by measuring liquor sample strain counter stress can characterize the change of liquid machine energy loss accurately, for the sign of liquid phase-change and applied research provide good research tool.In addition, measure in the environment of the vacuum formed at vacuum (-tight) housing due to test process, without condensation vapor, also further increase measuring accuracy.
Preferably, during test, in step S3, the sine wave freuqency of signal generator is the 80-120% of the resonant frequency of liquor sample, starting of oscillation sheet, permanent magnet and thin slice composition system.The viscoelastic behavior of liquid is the loss of mechanical energy, and the phasic difference that the loss of mechanical energy can strain counter stress by liquor sample characterizes.Experiment finds, in certain scope, the impact of change on phasic difference of stress amplitude, strain amplitude is little, but when test frequency is near system resonance frequency, test frequency is more close to resonant frequency, the phasic difference change that mechanical energy Dissipation change produces is greatly, higher to the precision of the measurement of liquid machine energy loss.So the present invention measures the change of the phasic difference of liquor sample strain counter stress near system resonance frequency, the precision of liquid machine energy loss measurement is greatly improved.So the present invention drives starting of oscillation sheet by solenoid, the change of measuring the phasic difference of liquor sample strain counter stress near system resonance frequency can characterize the change of liquid machine energy loss, changes study the phase transformation of liquid or character.
Further, the entrance and exit of described recycle oil bath extends to vacuum (-tight) housing surface location respectively by pipeline, and is connected with recycle oil bath thermostat in surface.
Further, described aspiration pump is mechanical pump or vacuum pump.Be not limited to this two kinds of pumps, as long as the vacuum tightness that vacuum (-tight) housing reaches certain can be made.
Further, described coupon is glass tube.Glass tube low price, adopts the glass test tube that laboratory is conventional.
Further, described smooth thin slice is thin glass sheet.This is also that the angle being in the aspect that reduces costs and draw materials is considered.
Further, described A/D converter is mould/number multifunction card.
Further, the temperature controlling range (the design temperature scope namely in step S2) of described recycle oil bath thermostat is-30
oc is to 180
oc.This temperature range limit with the selection of the oil bath medium of recycle oil bath thermostat, minimum control temperature and the restriction of working temperature of permanent magnet relevant, suitably select oil bath medium, temperature controller and permanent magnet, temperature controlling range of the present invention can be further expanded.
Further, described fixed mechanism is fixed chuck.This is the comparatively simple fixed mechanism of a kind of structure, certainly, as long as can fix starting of oscillation sheet, is not limited to adopt this kind of structure of fixed chuck.
Compared with prior art, the beneficial effect of technical solution of the present invention is: liquid machine loss analysis instrument of the present invention, by the automatic control of control system, achieves the object automatically measuring liquid machine loss.Only need the change of the phasic difference by measuring liquor sample strain counter stress can characterize the change of liquid machine energy loss accurately, for the sign of liquid phase-change and applied research provide good research tool.In addition, measure in the environment of the vacuum formed at vacuum (-tight) housing due to test process, without condensation vapor, improve measuring accuracy.
Accompanying drawing explanation
Fig. 1 is the liquid machine loss analysis instrument structural representation of the embodiment of the present invention.
Fig. 2 be in the embodiment of the present invention sample 25
ostrain amplitude during C
a-frequency
fcurve and phasic difference
-frequency
fcurve.
Fig. 3 be in the embodiment of the present invention sample in the phasic difference of 60Hz and 80Hz
-temperature
tcurve map.
Fig. 4 is the dielectric coefficient ε-temperature of corresponding liquor sample
tcurve map.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
For the ease of explaining and illustrating, the size of various piece and structure, does not represent physical size, has to exaggerate, and has to reduce, and what accompanying drawing represented is only schematic diagram, but not pictorial diagram.Specifically describe in order to clear, some known function and structure may be abridged, also omit the explanation of these structures.
In describing the invention, it will be appreciated that, term " on ", D score, "left", "right", " vertically ", " level ", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, unless otherwise prescribed or limit, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In the present invention, unless otherwise prescribed or limit, it should be noted that, term " installation ", " connection ", " being connected " should be interpreted broadly, such as, can be mechanically connected or be electrically connected or gas circuit connection, also can be the connection of two element internals, can be direct connection, also can be indirectly be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
Embodiment 1
As shown in Figure 1, be the liquid machine loss analysis instrument structural representation of the embodiment of the present invention, include vacuum test system and control system, vacuum test system comprises test suite and the vacuum (-tight) housing 2 for holding test suite; Vacuum (-tight) housing 2 is connected with mechanical pump 1.
Test suite comprises recycle oil bath 3, transparent glass tube 4, two electromagnetic drive coil 10, LASER Light Source 11 and differential photocells 12 for splendid attire testing liquid.The upper and lower of recycle oil bath 3 is respectively equipped with entrance 3a and outlet 3b.
At composition graphs 1, glass tube 4 opening upwards is arranged, and its underpart and recycle oil bath 3 are tightly connected, and the liquor sample 5 being contained in glass tube can be made to have good probe temperature environment.Be provided with starting of oscillation sheet 7 in glass tube 4, the openend of glass tube 4 is fixed in starting of oscillation sheet 7 upper end by fixed chuck 6, and lower end is connected with the ganoid thin glass sheet 9 for being inserted in testing liquid.Starting of oscillation sheet 7 is provided with permanent magnet 8.Two electromagnetic drive coil 10 are located at two side positions of glass tube 4 above recycle oil bath 3, and permanent magnet 8 south poles is on the line of centres of two electromagnetic drive coil 10.Such permanent magnet can side-to-side vibrations under the magneticaction of electromagnetic drive coil 10.The face normal direction of starting of oscillation sheet 7 is mutually vertical with the face normal direction of thin glass sheet 9, and the face normal direction of starting of oscillation sheet 7 and the south poles of permanent magnet 8 are in the same way.Above-mentioned orientation is arranged, and thin glass sheet 9 can be made relative to liquid to produce the Relative Vibration being parallel to surface of glass slide, drop to minimum to make the disturbance of thin glass sheet 9 pairs of liquid.Obviously, thin glass sheet is thinner, and disturbance is less, limitedly selects thin glass sheet.
LASER Light Source 11, starting of oscillation sheet 7 and differential photocell 12 set gradually on the same line in order, and three's line is perpendicular to the direction of vibration place plane of starting of oscillation sheet 7, and that is, the line of this three is perpendicular to the paper in Fig. 1.In order to comprehensively show all parts in Fig. 1, the position that LASER Light Source 11 and differential photocell 12 are placed is slightly different from reality.The hot spot 13 of the projection of starting of oscillation sheet 7 that what LASER Light Source 11 produced on differential photocell 12 have, for detecting the strain signal of starting of oscillation sheet 7.This strain signal detection architecture makes the overall volume of test suite reduce, especially because LASER Light Source 11 and differential photocell 12 are mounted in vacuum (-tight) housing 2 test, ensure that the shielding of signal, and the impact that the condensation eliminating steam causes measurement result.
Control system includes amplifying circuit 14, signal generator 15, mould/number multifunction card 16, computer system 17 and recycle oil bath thermostat 18, mould/number multifunction card 16 is connected with computer system 17, signal generator 15 and amplifying circuit 14 respectively, signal generator 15 is connected with two electromagnetic drive coil 10, and differential photocell 12 is connected with amplifying circuit 14.
Computer system 17 is connected with recycle oil bath thermostat 18, and recycle oil bath thermostat 18 is connected with the entrance and exit of recycle oil bath 3 respectively.As shown in Figure 1, the entrance and exit of recycle oil bath 3 extends to vacuum (-tight) housing 2 surface location respectively by pipeline, and is connected with recycle oil bath thermostat 18 in surface.Oil bath medium in recycle oil bath flows out to recycle oil bath thermostat 18 from outlet, after the regulation and control of recycle oil bath thermostat 18, flows back into recycle oil bath 3 from entrance.By computer system control recycle oil bath thermostat 18, accurately can regulate and control the temperature of recycle oil bath 3, temperature is regulated as required.The temperature controlling range of recycle oil bath thermostat 18 is-30
oc is to 180
oc.This temperature range limit with the selection of the oil bath medium of recycle oil bath thermostat 18, minimum control temperature and the restriction of working temperature of permanent magnet 8 relevant, suitably select oil bath medium, temperature controller and permanent magnet 8, temperature controlling range of the present invention can be further expanded.
A control method for above-mentioned liquid machine loss analysis instrument, comprises the steps:
S1. by liquor sample 5 splendid attire in glass tube 4;
S2. by computer system 17 controlled circulation oil bath thermostat 18, recycle oil bath 3 is heated/is cooled to design temperature;
S3. signal generator 15 is controlled by computer system 17, sine wave output signal gives two electromagnetic drive coil 10, vibrate to encourage permanent magnet 8, this sine wave signal is input to mould/number multifunction card 16 as the stress signal of starting of oscillation sheet 7, and permanent magnet 8 drives starting of oscillation sheet 7 to vibrate together with thin glass sheet 9; What LASER Light Source 11 produced on differential photocell 12 has the hot spot 13 of the projection of starting of oscillation sheet 7 as output signal, and the strain signal as starting of oscillation sheet 7 after being input to amplifying circuit 14 amplification is sent to computer system 17 by mould/number multifunction card 16 and stored;
S4. computer system 17 calculates the phasic difference of strain signal counter stress signal by Fast Fourier Transform (FFT), characterizes the mechanical loss of liquid with this.
During test, in step S3, the sine wave freuqency of signal generator 15 is liquor sample 5, starting of oscillation sheet 7, permanent magnet 8 and thin glass sheet 9 form the 80-120% of the resonant frequency of system.Above-mentioned resonant frequency obtains like this: before testing begins, a probe temperature is selected in Range of measuring temp, the system of liquor sample 5, starting of oscillation sheet 7, permanent magnet 8 and thin glass sheet 9 composition is carried out to the measurement of frequency spectrum, obtain the resonant frequency of system.Experiment shows more close to the resonant frequency of system, and the phasic difference change of mechanical loss change correspondence greatly, can improve measuring accuracy, as shown in Figure 3 greatly.
In the test process to liquor sample 5, mechanical loss is coupled by the mechanical loss of starting of oscillation sheet 7 and the mechanical loss of liquor sample 5 and produces, the phasic difference of impact strain counter stress, the starting of oscillation sheet 7 selected mechanical loss in the temperature range of test is that linear change is even substantially constant, this makes to test the change that the phasic difference change obtained can characterize the mechanical loss of liquid, the phase transformation of reaction liquid or change procedure.
Liquid machine loss analysis instrument measurement result of the present invention is described, to verify that the present invention has the high advantage of measuring accuracy below by experiment:
The liquor sample 5 that the present embodiment is selected is pentylbiphenyl cyanogen (being called for short 5CB) liquid crystal, and the temperature range of test is 20
oc is to 45
oc, this liquid crystal is in this temperature range without significantly volatilizing and impact test, and this liquid crystal is heated to 34
oc is to 36
oc has a Nematic liquid crystalline phase to the transformation of amorphous liquid phase, and specific inductive capacity changes isotropy (see figure 4) into by anisotropy.Starting of oscillation sheet 7 selects the stainless steel substrates of 20mm*3mm*0.2 mm, and Nd-Fe-B permanent magnet selected by permanent magnet 8, and thin glass sheet 9 selects the cover glass of the 20mm*3mm*0.15mm of well cutting, makes the disturbance of glass sheet to liquid drop to minimum.The test tube of internal diameter 8mm selected by glass tube 4, and liquor sample 1.5ml is housed.
First the system of liquor sample 5, starting of oscillation sheet 7, permanent magnet 8 and thin glass sheet 9 composition is carried out to the measurement of frequency spectrum, obtain 5CB liquid crystal system 25
ostrain amplitude during C
a-frequency
fcurve and phasic difference
-frequency
fcurve, as shown in Figure 2, the resonant frequency obtaining said system is thus 85Hz.
By the stress signal collected and strain signal, by Fast Fourier Transform (FFT), draw the phasic difference of 5CB liquid crystal system 60Hz and 80Hz
-temperature
tcurve map, as shown in Figure 3, can find out clearly, 5CB liquid crystal system changes much larger than phasic difference during at 60Hz in the phasic difference change of 80Hz, describe more close to the resonant frequency of system thus, the phasic difference change of mechanical loss change correspondence greatly, can improve measuring accuracy greatly.And the dielectric coefficient ε-temperature of liquor sample in comparison diagram 4
tcurve map can be found out, liquid machine loss test instrument of the present invention can characterize phase transformation or the change procedure of liquid well.
Above-described embodiment is better embodiment of the present invention; it should be understood that; above-described embodiment is not limited to the present invention; those of ordinary skill in the art is not when departing from the aim of principle of the present invention; the change made above-described embodiment, amendment, replacement and distortion, all should fall within protection scope of the present invention.
Claims (1)
1. a liquid machine loss analysis instrument, is characterized in that, includes vacuum test system and control system, and described vacuum test system comprises test suite and the vacuum (-tight) housing for holding test suite; Described vacuum (-tight) housing is connected with aspiration pump;
Described test suite comprises recycle oil bath, the transparent coupon for splendid attire testing liquid, two electromagnetic drive coil, LASER Light Source and differential photocells; The upper and lower of described recycle oil bath is respectively equipped with entrance and exit; Described coupon opening upwards is arranged, and its underpart and recycle oil bath are tightly connected; Be provided with starting of oscillation sheet in described coupon, the openend of coupon is fixed in described starting of oscillation sheet upper end by fixed mechanism, and lower end is connected with the ganoid thin slice for being inserted in testing liquid; Described starting of oscillation sheet is provided with permanent magnet; Described two electromagnetic drive coil are located at two side positions of coupon above recycle oil bath, and described permanent magnet south poles is on the line of centres of two electromagnetic drive coil; The face normal direction of described starting of oscillation sheet is mutually vertical with the face normal direction of thin slice, and LASER Light Source, starting of oscillation sheet and differential photocell set gradually on the same line in order, the direction of vibration place plane orthogonal of three's line and starting of oscillation sheet;
Described control system includes amplifying circuit, signal generator, A/D converter, department of computer science unify recycle oil bath thermostat, described A/D converter is connected with computer system, signal generator and amplifying circuit respectively, described signal generator is connected with two electromagnetic drive coil, and described differential photocell is connected with amplifying circuit; Computer system is connected with recycle oil bath thermostat, and described recycle oil bath thermostat is connected with the entrance and exit of recycle oil bath respectively.
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| CN106814007A (en) * | 2015-12-01 | 2017-06-09 | 广西大学 | A kind of flow measurements computer control system |
| CN107607443A (en) * | 2017-09-08 | 2018-01-19 | 广东轻工职业技术学院 | A kind of small-sized torque rheometer suitable for tabletop experiments |
| CN114428025B (en) * | 2022-01-04 | 2023-09-26 | 苏州热工研究院有限公司 | Portable internal consumption measuring instrument and internal consumption measuring method |
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| CN1475793A (en) * | 2003-06-28 | 2004-02-18 | 浙江大学 | Ultrasonic wave vibration field slit flow small angle laser light scattering real time observation system |
| CN101093189A (en) * | 2006-06-22 | 2007-12-26 | 米其林技术公司 | Orthogonal rheometer |
| CN101308076A (en) * | 2008-03-31 | 2008-11-19 | 中山大学 | Method for using forced resonance torsional pendulum instrument for measuring liquid continuous frequency conversion viscoelasticity |
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| JPH01132931A (en) * | 1987-11-18 | 1989-05-25 | Chichibu Cement Co Ltd | Method for analyzing physical properties of sample by viscometer |
| JPH0470579A (en) * | 1990-07-11 | 1992-03-05 | Fujitsu Ltd | Testing device for electronic circuit unit |
| JP5098817B2 (en) * | 2008-05-29 | 2012-12-12 | ソニー株式会社 | Physical property measuring apparatus and physical property measuring method |
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|---|---|---|---|---|
| CN1475793A (en) * | 2003-06-28 | 2004-02-18 | 浙江大学 | Ultrasonic wave vibration field slit flow small angle laser light scattering real time observation system |
| CN101093189A (en) * | 2006-06-22 | 2007-12-26 | 米其林技术公司 | Orthogonal rheometer |
| CN101308076A (en) * | 2008-03-31 | 2008-11-19 | 中山大学 | Method for using forced resonance torsional pendulum instrument for measuring liquid continuous frequency conversion viscoelasticity |
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| Title |
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| 丁喜冬.共振吸收谱仪测量***的研制.《中山大学学报(自然科学版)》.2001,第40卷 * |
| 林国淙.液体膜切变波共振吸收谱仪的研制与应用.《中山大学学报(自然科学版)》.2005,第44卷(第4期), * |
| 高精度扭摆流变仪及其在液晶5CB电场相应行为研究中的应用;张晓炜;《万方学位论文全文数据库》;20080925;13页倒数第1段，16页倒数第2行，17页第13行，17页倒数第8-7行，17页倒数第1行-18页第7行，20页倒数5-3行， 24页倒数第7行， 26页倒数6-4行，图2-1，图1-8 * |
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