CN106769397A - It is a kind of measure single meat fiber stress mechanical behavior equipment and method of testing - Google Patents
It is a kind of measure single meat fiber stress mechanical behavior equipment and method of testing Download PDFInfo
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- CN106769397A CN106769397A CN201710090123.2A CN201710090123A CN106769397A CN 106769397 A CN106769397 A CN 106769397A CN 201710090123 A CN201710090123 A CN 201710090123A CN 106769397 A CN106769397 A CN 106769397A
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- displacement
- meat fiber
- fiber sample
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/483—Physical analysis of biological material
- G01N33/4833—Physical analysis of biological material of solid biological material, e.g. tissue samples, cell cultures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention provides it is a kind of measure single meat fiber stress mechanical behavior equipment and method of testing, the equipment includes the instrument host that fixed clamp seat and movable grip slipper by being oppositely arranged are constituted, fixed clamp seat includes determining probe for clamp meat fiber sample one end, the movable grip slipper includes the dynamic probe of electricity driving displacement platform and the clamping meat fiber sample other end, and integrated small load and deformation measurement function are in the sensor of one；For observing the microscope that the meat fiber sample deforms in process of the test, and Control release process and gathered data measurement and control unit.Sensor integration load and deformation measurement function that the present invention is used, compact conformation, high resolution, strong antijamming capability are economical and practical.
Description
Technical field
The present invention relates to biomethanics field, more particularly to it is a kind of be used for single meat fiber stress mechanical behavior carry out
The equipment and method of testing of measurement.
Background technology
With the development of modern biology, the research for biological tissue, structure, cell etc. is more and more deep, research
Object is less and less, and its active force also reduces therewith.In meat fiber is in different media environments or by external electric signal
During stimulation, the deformation of multi-form will be produced.The problems such as this is to research muscle reparation and motion control is extremely crucial, is current life
The field that material resources and clinical medicine are all extremely paid close attention to.
Because the diameter of single meat fiber only has 100 microns, power and deformation all very littles, needed in experiment same
When measurement meat fiber actively shrink power and deformation, suitable experimental facilities is there is no at present.
The content of the invention
The invention aims to provide it is a kind of stress the equipment that measures of mechanical behavior and survey to single meat fiber
Method for testing.
Especially, the present invention provide it is a kind of measure single meat fiber stress mechanical behavior equipment, including：
Instrument host, including the fixed clamp seat and movable grip slipper being oppositely arranged, the fixed clamp seat include being used for
The probe of determining of meat fiber sample one end is clamped, the movable grip slipper includes realizing the electronic of horizontal any point position adjustments
Displacement platform, and the dynamic probe of the meat fiber sample other end is clamped, the dynamic probe passes through passive displacement component and the electricity
Dynamic displacement platform connection, the passive displacement component is used to react the displacement of the meat fiber sample, in the electricity driving displacement
The displacement transducer for measuring the passive displacement component change in displacement is installed on platform；
Light microscope, for observing deformation of the meat fiber sample in process of the test；
Measurement and control unit, including the computer being connected with the instrument host, the computer are used to send control instruction, together
When collection experimentation in each equipment experimental data.
In an embodiment of the invention, the passive displacement component includes Deformable rack, and the Deformable rack is rectangle
Framework, the rectangular frame is located in same level with the dynamic probe, and the dynamic probe and the one of the rectangular frame
The midpoint of individual long side vertically connects, and the midpoint of another long side of the rectangular frame is solid with the electricity driving displacement platform
It is fixed.
In an embodiment of the invention, the passive displacement component includes Deformable rack, and the Deformable rack is annular
Framework, the annular frame is located in same level with the dynamic probe, and the annular frame is distinguished by relative both sides
It is fixedly connected with the dynamic probe and the electricity driving displacement platform.
In an embodiment of the invention, it is vertically and fixedly provided with tie point of the dynamic probe with the Deformable rack
Displacement reflects bar, and the top of displacement reflection bar is corresponding with the measurement point of institute's displacement sensors.
In an embodiment of the invention, institute's displacement sensors are laser displacement sensor, anti-in the displacement
The top for reflecting bar is fixed with the light barrier for blocking laser.
In an embodiment of the invention, it is fixed between institute's displacement sensors and the electricity driving displacement platform
The manual adjustment seat of institute's displacement sensors and light barrier relative horizontal position is adjusted manually.
In an embodiment of the invention, mounting rod is fixed with the electricity driving displacement platform, in the installation
One end of bar is fixed with the connecting plate perpendicular to ground, and the Deformable rack is fixed by pole with the connecting plate.
In an embodiment of the invention, the instrument host also includes adjusting the dynamic probe and/or institute respectively
State the vertical adjusting seat for determining probe height.
An embodiment of the invention provides a kind of method of testing of equipment, comprises the following steps：
Step 100, prepares the equipment for testing；
Step 200, the two ends of meat fiber sample to be tested is separately fixed at and is determined on probe and dynamic probe, and by electricity
Dynamic displacement platform makes meat fiber sample be in uncharged straight configuration；
Step 300, is tested to the meat fiber sample in adjustment state by specified requirement；
Step 400, according to the geometric parameter of meat fiber sample, the passive position of experiment condition, and displacement sensor
Move the displacement data of part, and the loading parameter that electricity driving displacement platform sets, you can obtain meat fiber examination under different condition
The mechanical behavior feature of sample.
In an embodiment of the invention, the preparation in the step 100 includes：Obtain the electricity of dynamic probe
Pressure-power indicatrix and installation and debugging instrument；
Specified in the step 300 requires to include：By same length or the same muscle of different length or different-diameter
Fiber samples are immersed in different solution, observe the telescopic variation and record data of meat fiber sample；With
The same meat fiber sample of same length or different length or different-diameter is soaked using electricity driving displacement platform
In different solution, then apply displacement loading observation change and the record data specified.
The passive displacement component that the present invention is used can accurately react the micro-displacement change of dynamic probe, by contactless
The displacement of the passive displacement component of displacement sensor, accurately and reliably, strong antijamming capability can measure micron-sized displacement.
Under appropriate elastic construction rigidity, displacement is applicable to the measurement of micro- ox power through being scaled load, and this is conventional foil gauge method
Difficult to realize.
Brief description of the drawings
Fig. 1 is the measurement procedure schematic diagram of the meat fiber sample of one embodiment of the present invention；
Fig. 2 is the structural representation of Fig. 1 Instrumental main frames；
Fig. 3 is the integrated small power of one embodiment of the present invention and the sensor construction schematic diagram of deformation measurement function；
Fig. 4 is the method for testing step schematic diagram of one embodiment of the present invention.
Specific embodiment
As shown in Figure 1, 2, the single meat fiber of measurement of one embodiment of the present invention stress mechanical behavior equipment one
As property ground include instrument host, microscope and measurement and control unit.
The instrument host includes the fixed clamp seat being oppositely arranged and movable grip slipper；Fixed clamp seat is included for clamping
Probe 10 is determined in meat fiber sample one end；Movable grip slipper includes that the electricity driving displacement for realizing horizontal any point position adjustments is put down
Platform 4, and the dynamic probe 9 of the meat fiber sample other end is clamped, probe 9 is moved by passive displacement component 3 and electricity driving displacement platform 4
Connection, passive displacement component 3 is used to be reacted in the case where electricity driving displacement platform 4 is not influenceed the displacement of meat fiber sample,
The displacement transducer 6 for measuring the passive change in displacement of displacement component 3 is installed on electricity driving displacement platform 4.
After the light microscope is clamped for meat fiber sample, the change of meat fiber sample is observed in experimentation
Shape state or process.
The measurement and control unit is connected with instrument host, and each part is gathered simultaneously in examination for sending control instruction to instrument host
Experimental data during testing, specific measurement and control unit can include computer or single-chip microcomputer, can on computer or single-chip microcomputer
To be installed into the data collecting card of row Data Collection, and electricity driving displacement platform controller, the signal of data collecting card collection
The voltage signal of displacement transducer 6 can be included.Controller can be the control journey that can control and monitor electricity driving displacement platform
Sequence.
In present embodiment, determine probe 10 and dynamic probe 9 is parallel to the ground and both positions are relative, midfeather is certain
Distance.After probe 10 is determined at the two ends of meat fiber sample respectively and dynamic probe 9 is fixed, can be by electricity driving displacement platform 4
Adjust the extended state of meat fiber sample.Electricity driving displacement platform 4 can include a fixed seat, and one is relatively fixed seat energy
Enough realize the adjustment seat for moving horizontally.The knot of the passive Passive deformation for a contraction with meat fiber sample of displacement component 3
Structure, passive displacement component 3 can completely be reacted and be digested the change for moving power on probe 9 by displacement, without influenceing electronic position
The change in displacement of platform 4 is moved, i.e., passive displacement component 3 can be servo-actuated the institute of probe 9 in the case where electricity driving displacement platform 4 is motionless
The power received and synchronous shift, and restored when external force is lost.Specific passive displacement component 3 can be an elastic component.
Displacement transducer 6 is used to measure the displacement of passive displacement component 3, you can obtain the drawing of meat fiber sample indirectly
Power or convergent force.
In experiment, one end of meat fiber sample is fixed on and is determined on probe 10, the other end is fixed on dynamic probe 9,
Meat fiber sample is maintained under straight condition by electricity driving displacement platform 4, various experiments, meat fiber examination are then carried out again
The change of sample power in experimentation can be reflected by passive displacement component 3, and the change quilt of passive displacement component 3
Displacement transducer 6 is measured, and is sent to measurement and control unit, and measurement and control unit can also monitor the operation ginseng of electricity driving displacement platform 4 simultaneously
Number, is analyzed, you can obtain the recovery mechanical behavior of current meat fiber sample by the variation relation to power and time.
For convenience of fixed meat fiber sample, the one end for determining probe 10 and the fixation meat fiber sample of dynamic probe 9 can set
It is set to hook-like.The material for determining probe 10 and dynamic probe 9 can use steel wire or tungsten filament.
The present invention measures load indirectly using displacement transducer, belongs to non-contact measurement, accurately and reliably, antijamming capability
By force, micron-sized displacement can be measured.Under appropriate elastic construction rigidity, displacement is applicable to micro- ox power through being scaled load
Measurement, this be conventional foil gauge method be difficult to realize.
The present invention can be conducive to loading small sample, essence from three dynamic probes of direction regulation and the relative position for determining probe
It is determined that position.While instrument host carries out loading test to meat fiber sample, can be fine to muscle by light microscope
Dimension sample carries out home position observation, not only realizes the situation of change of real-time monitoring meat fiber sample, can also carry out in site measurement.
By the dynamic probe or different size displacement transducer of change the outfit various geometric or material, range and precision can be adjusted, it is full
The different experiment demand of foot, the scope of application is wider.
As shown in figure 3, in an embodiment of the invention, passive displacement component 3 can include that one is used to react
The Deformable rack of meat fiber sample power change, the Deformable rack can be rectangular frame, and rectangular frame is located at same water with dynamic probe 9
In plane and and ground level, it is dynamic that probe 9 is vertical with the midpoint of a long side of rectangular frame is connected, rectangular frame it is another
The midpoint of individual long side is fixed with electricity driving displacement platform 4.
When dynamic probe 9 is subject to the power of meat fiber sample, the rectangular frame is to be deformed upon because of stress, so that dynamic
Probe 9 produces displacement, and the displacement is to be displaced by sensor to measure.Rectangular frame can be a rectangular framework, its by
Possess the interval material of certain linear elasticity to constitute, such as tungsten filament, the class of steel wire one can be with stress and deformations, and can be extensive when external force is eliminated
Restore the material of shape.
Positioned at the side center of rectangular frame at tie point due to two counter structure displacement points with rectangular frame, therefore
Will not be relatively rotated during deformation, according to the material and structural parameters of rectangular frame, the rectangular frame two can be calculated
The preferable equivalent stiffness of counter structure point is：Wherein E is the Young's modulus of material, and D is material
Filament diameter, a, b are respectively the length and width of rectangle frame.
The length-width ratio and material diameter of specific rectangular frame, can be set, it is also possible to according to be measured according to requirement of experiment
The meat fiber sample and lab space size of examination are selected.By changing geometric parameter a, b, D, can significantly adjust just
Degree, it is adaptable to the meat fiber sample of different characteristic.By the theoretical calculation formula of equivalent stiffness, the model of design parameter according to a preliminary estimate
Enclose.
In the present embodiment, the length-width ratio of rectangular frame can 8/1 or so, e.g., using the tungsten filament of diameter 0.22mm,
Length and width take 8cm and 1cm respectively.
Passive displacement component 3 in present embodiment is using the design of symmetrical rectangular frame so that in measurement meat fiber sample
When copingability, meat fiber sample end bearing will not produce three-dismensional effect because of relative rotation, can be effectively accurate
Its restoring force must be measured.Dynamic probe 9 and rectangular frame are designed to a plane, and whole framework can be facilitated to be immersed in experiment with probe
In solution environmental.
In yet another embodiment of the present invention, the Deformable rack of the passive displacement component can also be an annular frame
(not shown), such as circular or ellipse, it is necessary to ensure that the annular material can make probe 9 be maintained at horizontality,
Simultaneously can when by external force can with deformation, and external force elimination after can be with restorable characteristic.Its effect and measurement side
Method is identical with rectangular frame structure, is not repeated herein.
In an implementation method of invention, the displacement of passive displacement component 3 is obtained for convenience, can be in dynamic probe 9
Fixed displacement vertical with the tie point of Deformable rack reflects bar 8, the top of displacement reflection bar 8 and the measurement point of displacement transducer 6
Correspondence.The position of displacement reflection bar 8 is located at outside the deformation range of rectangular frame or annular frame, can be servo-actuated the movement of probe 9
And synchronizing moving.After using displacement reflection bar 8, the measuring point of the dynamic probe 9 of measurement can be made to move to other positions, so as to avoid influence
The operation of dynamic probe 9.The height of displacement reflection bar 8 can be adjusted according to the setting height(from bottom) of displacement transducer 6.
Further, in other embodiments, specific displacement transducer 6 can be laser displacement sensor, together
When in order to effectively measure displacement, the termination of displacement reflection bar 8 need to be arranged to the face of being in the light of laser, the face of being in the light can be in place
Move the light barrier 81 that the top of reflection bar 8 is fixed.
In an embodiment of the invention, can between displacement transducer 6 and electricity driving displacement platform 4 fixed manual
Adjust the manual adjustment seat 5 of the horizontal level of displacement transducer 6.When electricity driving displacement platform 4 adjust active probe 9 with determine probe 10 it
Between distance after, displacement transducer laser spot position need to be adjusted, thus can manually adjustment seat 5 to displacement pass
The facula position of sensor 6 is adjusted.Manual adjustment seat 5 can include a base fixed with electricity driving displacement platform 4, and one
The individual Mobile base that one-dimensional position regulation can be in the horizontal plane realized on base, displacement transducer 6 is arranged on Mobile base
On.The move mode of Mobile base can be the structure that track structure, or screw rod and screwed hole coordinate.
For convenience of fixed dynamic probe 9, in an embodiment of the invention, can be fixed on electricity driving displacement platform 4
Mounting rod 7, dynamic probe 9 and passive displacement component 3 can be directly anchored on mounting rod 7, it is also possible to by being fixed on mounting rod 7
One end and connecting plate 71 perpendicular to ground is fixed.To avoid influenceing the deformation of passive displacement component 3, Deformable rack can be by position
Fixed with connecting plate 71 in the pole on the same straight line of dynamic probe 9.Can be conveniently fixed using the structure of mounting rod 7 and connecting plate 71
Probe 10 and dynamic probe 9 it is relatively independent go out fixed clamp seat and movable grip slipper, so as to be easier to make to have clamped meat fiber examination
Determine probe 10 and the dynamic probe 9 of sample are in specific experimental situation, such as immersion in the solution.
In an embodiment of the invention, instrument host can include a bottom for being used for two grip slippers of fixed left and right
Seat 1, to be moved easily whole instrument host.In addition, it can include adjusting dynamic probe 9 respectively and/or determining the height of probe 10
Vertical adjusting seat 21 and 22.Vertical adjusting seat 22 can realize that it is high that probe 10 is determined in regulation as the installation pedestal for determining probe 10
While spending, play a part of to determine probe 10.Vertical adjusting seat 21 positioned at movable grip slipper side may be mounted at electricity
Move between displacement platform 4 and base 1, to be highly adjusted to the whole of movable grip slipper.Specific vertical adjusting seat 21
Can be a liftable manual regulating platform with 22, the height of supporting plate is adjusted by the stubborn bolt on the supporting plate of screwed hole
Degree.
As shown in figure 4, in an embodiment of the invention, there is provided the single meat fiber restoring force scholarship and moral conduct of one kind measurement
For method of testing, the method comprises the following steps：
Step 100, prepares the equipment for testing；
Preparation includes：Obtain the voltage-power indicatrix and installation and debugging instrument of dynamic probe.
The mode for obtaining voltage-power indicatrix is as follows：Prepare a micro electronic balance, by equipment iron stand or light
Learn pallet to be secured in place, and make the appropriate location of the probe in micro electronic balance normal work of probe.Use
Electricity driving displacement platform load deflection, the voltage signal and micro electronics day of the laser displacement sensor of record data capture card collection
Flat load value；A series of voltage, the load value that will be gathered, process according to mechanical model and certain conversion are to be moved
The voltage of probe-power indicatrix.
After obtaining voltage-power indicatrix, installation and debugging instrument, it is ensured that each equipment normal work.
Step 200, the two ends of meat fiber sample to be tested is separately fixed at and is determined on probe and dynamic probe, and by electricity
Dynamic displacement platform makes meat fiber sample be in uncharged straight configuration；
Step 300, is tested to the meat fiber sample in adjustment state by specified requirement；
Here specified requires to include：The same meat fiber sample of same length or different length or different-diameter is soaked
Bubble observes the telescopic variation and record data of meat fiber sample in different solution；With
The same meat fiber sample of same length or different length or different-diameter is soaked using electricity driving displacement platform
In different solution, then apply displacement loading observation change and the record data specified.
Such as：In solution (concentration is X1) needed for being immersed in after first meat fiber sample is loaded.After it is stable,
Dynamic probe location is adjusted by electricity driving displacement platform, makes meat fiber sample into just straight condition.Write down initial voltage U0, use
It is measured microscopically the initial length L of meat fiber0With average diameter d0。
The displacement parameter of appropriate electricity driving displacement platform is set again, meat fiber sample is stretched, recording laser position
Displacement sensor voltage (U)-time (t) signal, and electricity driving displacement platform displacement (Δ X)-time (t) parameter.
Then it is the solution of X2 to change concentration, repeats the step of above, to measure corresponding data.According to above-mentioned data
Obtain meat fiber sample mechanical property under various circumstances.
The process for measuring meat fiber sample restoring force is as follows：First meat fiber sample is loaded, and is X1 in concentration
Solution in be adjusted to just straight condition, then the solution for being replaced by X2 in situ is passed after front and rear laser displacement is recorded after stabilization
Voltage (Δ U) data of sensor.
The process of test meat fiber recovery process rule (ratio method of testing) is as follows：Respectively choose different length than flesh
Meat fiber sample L1、pL1, just straight condition, then the solution for being replaced by X2 in situ are first adjusted in concentration is for the solution of X1,
After (Δ U) data that front and rear laser displacement sensor voltage is recorded after stabilization.
Step 400, according to the geometric parameter of meat fiber sample, the passive position of experiment condition, and displacement sensor
Move the displacement data of part, and the loading parameter that electricity driving displacement platform sets, you can obtain meat fiber examination under different condition
The mechanical behavior feature of sample.
Specific calculation is as follows：(1) voltage (the Δ U=U-U that will be gathered0)-time (t) signal and electricity driving displacement
Platform displacement (Δ X)-time (t) is scaled the actual displacement (Δ S) of sample moved end-time (t) relation, relational expression：Δ S=α
Δ U+ Δ X, wherein α are the voltage-displacement sensitivity of laser displacement sensor, and Δ X is set by electricity driving displacement platform operation program
Parameter is put to try to achieve.Can obtain the relation of actual displacement (Δ the S)-time (t) of sample moved end.
(2) voltage (the Δ U=U-U for gathering the data collecting card of measurement and control unit0)-the time (t), signal was according to foregoing mark
Fixed voltage-power indicatrix, is converted into actual load (F=β Δ U)-time (t) relation being subject to of meat fiber sample, and β is
Slope is fitted by dynamic probe voltage-power indicatrix.Can obtain the relation of sample actual load (the F)-time (t) being subject to.
(3) time term is eliminated, then by initial length L0With average diameter d0, can obtain engineering stress (σ)-engineering strain (ε)
Relation curve or load (F)-displacement (Δ S) relation curve.
(4) the Δ U that will above measure is converted into the actual load (F=β Δ U) being subject to of meat fiber sample, as measures
Restoring force size.
In the method, analysis test meat fiber recovery process rule result, if the meat fiber examination of different length
Laser displacement sensor voltage (Δ U) is identical before and after sample changes solution, then after changing solution concentration, meat fiber sample is certain
It is to recover to shrink by constant force in displacement range, this power is then the restoring force of muscle.
If laser displacement sensor voltage (Δ U) is differed before and after the meat fiber sample of different length changes solution,
But Δ U2=p Δs U1, then after changing solution concentration, meat fiber is recovered by constant length shrinkage ratio in the range of certain force.No
Restoring force and the size and load condition for choosing muscle fibre with situation have substantial connection.
If not result above, then possible its natural length of meat fiber sample and Young's modulus all change.
The restoring force of different situations has substantial connection with the size for choosing muscle fibre.The change of its Young's modulus, parameter can from (4)
.
This method, can the ingenious recovery rule for studying meat fiber by aforementioned ratio method of testing.
The laser displacement sensor being related in the application can be using the Microtrak of MTI Instruments companies
II-SA type laser displacement sensors, the useful range of the sensor is 2mm, and sensitivity is 0.25 μm/mV, is made an uproar under home
The horizontal 0.8mV of sound.The sensor linearity is very good, noise very little, if using the larger sensor of other noises, the instrument
Work is remained to, but the certainty of measurement of displacement can be directly affected.
Electric translation platform can using Beijing stand upright Han Guang companies TSAx-C series ultrathin type electronic control translation stage combine,
Resolution ratio 0.625 (μm) repetitive positioning accuracy under its 8 subdivision<5(μm).The electricity driving displacement platform is stable, programmable control
System operation.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple of the invention and show
Example property embodiment, but, without departing from the spirit and scope of the present invention, still can be direct according to present disclosure
It is determined that or deriving many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all these other variations or modifications.
Claims (10)
1. it is a kind of measure single meat fiber stress mechanical behavior equipment, it is characterised in that including：
Instrument host, including the fixed clamp seat and movable grip slipper being oppositely arranged, the fixed clamp seat are included for clamping
Probe is determined in meat fiber sample one end, and the movable grip slipper includes realizing the electricity driving displacement of horizontal any point position adjustments
Platform, and the dynamic probe of the meat fiber sample other end is clamped, the dynamic probe passes through passive displacement component and the electronic position
Platform connection is moved, the passive displacement component is used to react the displacement of the meat fiber sample, in the electricity driving displacement platform
On the displacement transducer for measuring the passive displacement component change in displacement is installed；
Light microscope, for observing deformation of the meat fiber sample in process of the test；
Measurement and control unit, including the computer being connected with the instrument host, the computer are used to send control instruction, while adopting
The experimental data of each equipment in collection experimentation.
2. equipment according to claim 1, it is characterised in that
The passive displacement component includes Deformable rack, and the Deformable rack is rectangular frame, the rectangular frame and the dynamic probe
In same level, and the dynamic probe is vertical with the midpoint of a long side of the rectangular frame is connected, the square
The midpoint of another long side of shape framework is fixed with the electricity driving displacement platform.
3. equipment according to claim 1, it is characterised in that
The passive displacement component includes Deformable rack, and the Deformable rack is annular frame, the annular frame and the dynamic probe
In same level, the annular frame by relative both sides respectively with the dynamic probe and the electricity driving displacement platform
It is fixedly connected.
4. the equipment according to Claims 2 or 3, it is characterised in that
Displacement reflection bar is vertically and fixedly provided with tie point of the dynamic probe with the Deformable rack, the displacement reflects the top of bar
End is corresponding with the measurement point of institute's displacement sensors.
5. equipment according to claim 4, it is characterised in that
Institute's displacement sensors are laser displacement sensor, are fixed with the top of displacement reflection bar and block being in the light for laser
Plate.
6. equipment according to claim 5, it is characterised in that
It is fixed between institute's displacement sensors and the electricity driving displacement platform and adjust institute's displacement sensors and be in the light manually
The manual adjustment seat of plate relative horizontal position.
7. equipment according to claim 6, it is characterised in that
Mounting rod is fixed with the electricity driving displacement platform, the connection perpendicular to ground is fixed with one end of the mounting rod
Plate, the Deformable rack is fixed by pole with the connecting plate.
8. equipment according to claim 1, it is characterised in that
The instrument host also includes adjusting the dynamic probe and/or the vertical adjusting seat for determining probe height respectively.
9. the method for testing of equipment described in claim 1, it is characterised in that comprise the following steps：
Step 100, prepares the equipment for testing；
Step 200, the two ends of meat fiber sample to be tested is separately fixed at and is determined on probe and dynamic probe, and by electronic position
Moving platform makes meat fiber sample be in uncharged straight configuration；
Step 300, is tested to the meat fiber sample in adjustment state by specified requirement；
Step 400, according to the geometric parameter of meat fiber sample, the passive displacement portion of experiment condition, and displacement sensor
The displacement data of part, and electricity driving displacement platform setting loading parameter, you can obtain meat fiber sample under different condition
Mechanical behavior feature.
10. method of testing according to claim 9, it is characterised in that
Preparation in the step 100 includes：Obtain the voltage-power indicatrix and installation and debugging instrument of dynamic probe；
Specified in the step 300 requires to include：By same length or the same meat fiber of different length or different-diameter
Sample is immersed in different solution, observes the telescopic variation and record data of meat fiber sample；With
The same meat fiber sample of same length or different length or different-diameter is immersed in not using electricity driving displacement platform
In same solution, then apply displacement loading observation change and the record data specified.
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| CN201710090123.2A CN106769397A (en) | 2017-02-20 | 2017-02-20 | It is a kind of measure single meat fiber stress mechanical behavior equipment and method of testing |
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| CN201710090123.2A CN106769397A (en) | 2017-02-20 | 2017-02-20 | It is a kind of measure single meat fiber stress mechanical behavior equipment and method of testing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110301923A (en) * | 2019-07-01 | 2019-10-08 | 清华大学 | The micro- measuring system of bridge type mechanism applied to muscle stretch Mechanics Performance Testing |
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