CN108717025A - A kind of two-way shape memory alloy heat-mechanical function fatigue characteristic testing device - Google Patents
A kind of two-way shape memory alloy heat-mechanical function fatigue characteristic testing device Download PDFInfo
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- CN108717025A CN108717025A CN201810356246.0A CN201810356246A CN108717025A CN 108717025 A CN108717025 A CN 108717025A CN 201810356246 A CN201810356246 A CN 201810356246A CN 108717025 A CN108717025 A CN 108717025A
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- measured piece
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- memory alloy
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
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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
- G01N3/60—Investigating resistance of materials, e.g. refractory materials, to rapid heat changes
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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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
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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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
- G01N2203/0202—Control of the test
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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
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0224—Thermal cycling
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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
- G01N2203/0676—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
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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
- G01N2203/0694—Temperature
Abstract
The present invention relates to memorial alloy test device fields, disclose a kind of two-way shape memory alloy heat-mechanical function fatigue characteristic testing device, including data acquisition control system, mechanical load component, clamp assemblies and power control system, mechanical load component includes screw slide and the stepper motor for driving leading screw, clamp assemblies include the first fixture block and the second fixture block, first fixture block is connect with leading screw, data acquisition control system includes microcontroller and the pulling force sensor being connected electrically, temperature sensor, displacement sensor and resistivity measurement module, second fixture block is connect with pulling force sensor, resistivity measurement module is electrically connected with measured piece, power control system includes constant-current supply and the relay that is connect with constant-current supply, constant-current supply is electrically connected with measured piece, relay, stepper motor and monolithic mechatronics.The present invention can quantitatively evaluate two-way shape memory alloy test specimen heat-mechanical function fatigue properties under CYCLIC LOADING.
Description
Technical field
The present invention relates to memorial alloy test device fields, in particular to a kind of two-way shape memory alloy heat-machine
Tool function fatigue characteristic testing device.
Background technology
Marmem (Shape Memory Alloy, SMA) is the alloy that one kind " can remember " its original shape
Material is a kind of intellectual material due to having sensing and driving function simultaneously.Its major function property includes one-way shape memory
Effect, double process shape-memory effect and super-elasticity.Restore when wherein double process shape-memory effect refers to marmem heating
High-temperature-phase (austenite phase) shape, the phenomenon that capable of restoring low-temperature phase (martensitic phase) shape again when cooling.
The preparation of two-way shape memory alloy usually requires to train by certain thermo-mechanical cycle.In two-way shape memory
Alloy product in actual use, often bears Thermo mechanical cyclic loading effect, prolonged martensite (inverse) occurs
Phase transformation recycles, and prolonged phase transformation cycle will lead to the degeneration or change of SMA functional characteristics.For example, the increasing recycled with phase transformation
Add SMA that may undergo phase transition phenomena such as temperature changes, the hysteresis of phase transformation increases, phase transformation limit stress reduces, and then generates function
Fatigue.Function fatigue not only influences service life of the two-way shape memory alloy product in terms of function realization, can also further cause
Alloy microscopic structure variation and structural damage or fracture, greatly reduce its service life.
Therefore, a kind of test system reliably, safe is designed to carry out two-way shape memory alloy thermo-mechanical sensitivity characteristic
Quantitative study is the key that its further engineering application.
Invention content
The purpose of the present invention is to provide a kind of two-way shape memory alloy heat-mechanical function fatigue characteristic testing device,
Stable mechanical load and thermal cycle load can be carried out to the two-way shape memory alloy test specimen of different length, use microcontroller
Control program is write, and the data such as stress, strain, temperature, resistivity in loading procedure are acquired in real time, it can be quantitatively
Evaluate two-way shape memory alloy test specimen heat-mechanical function fatigue properties under CYCLIC LOADING.
What the embodiment of the present invention was realized in：
A kind of two-way shape memory alloy heat-mechanical function fatigue characteristic testing device, including rack, data acquisition control
System, mechanical load component, clamp assemblies and power control system；Rack includes bottom plate and is relatively arranged on the two of bottom plate side
A side plate；Mechanical load component includes screw slide and stepper motor, and screw slide is set between two side plates, bottom plate, side
Plate and screw slide enclose the test space, and the leading screw of screw slide extends to the test space, and stepper motor connects with screw slide
It connects for driving leading screw；Clamp assemblies are set to the test space, and clamp assemblies include the first folder for measured piece one end to be clamped
Block and the second fixture block for the measured piece other end to be clamped, the first fixture block are connect by bearing with leading screw.
Data acquisition control system includes microcontroller, and with the pulling force sensor of monolithic mechatronics, temperature sensor,
Displacement sensor and resistivity measurement module, microcontroller and the upper mechatronics in the ends PC；Pulling force sensor is set to bottom plate, and second
Fixture block is connect by bias spring with pulling force sensor, and leading screw, measured piece and pulling force sensor are located at same axial direction；Temperature sensing
Device is installed on side plate close to the side of the test space and between the first fixture block and the second fixture block；Displacement sensor is installed on survey
Examination space is for monitoring by the displacement of side part；Resistivity measurement module is electrically connected with measured piece；Stepper motor is electrically connected with microcontroller
It connects；Power control system includes constant-current supply and the relay that is connect with constant-current supply, and constant-current supply is electrically connected with measured piece, after
Electric appliance and monolithic mechatronics.
Further, further include cooling fan, cooling fan is set to the test space and is pressed from both sides positioned at the first fixture block and second
Between block, cooling fan and monolithic mechatronics.
Further, resistivity measurement module includes four electrodes arranged successively along the axial direction of measured piece, and the two of inside
A electrode is electrically connected with potentiometer, and two electrodes in outside are electrically connected with galvanometer, and galvanometer, potentiometer are electrically connected with microcontroller
It connects.
Further, screw slide includes slide unit plate and is set to the feed screw nut's assembly of slide unit plate, stepper motor installation
It is engaged with the drive shaft of stepper motor by gear assembly in the nut of slide unit plate, feed screw nut's assembly.
Further, displacement sensor includes sensor body, the first guiding axis and the second guiding axis, the first guiding axis and
Second guiding axis is respectively arranged at the both sides of measured piece along the axial direction of measured piece, and the first guiding axis is equipped with the first sliding block, the second cunning
Block, the second guiding axis are equipped with third sliding block, Four-slider, mounting plate, mounting plate are connected between the first sliding block and third sliding block
Axially vertical with measured piece, mounting plate is fixedly connected with the first fixture block, and reception is connected between the second sliding block and Four-slider
Plate, receiver board and measured piece it is axially vertical, receiver board is fixedly connected with the second fixture block, sensor body use photo-electric displacement
Sensor.
Further, the first fixture block, the second fixture block are equipped with high-temperature insulation set.
Further, temperature sensor is infrared radiation thermometer.
Further, bearing is air bearing.
The advantageous effect of the embodiment of the present invention is：
1. two-way shape memory alloy will be after following cyclic process during function testing fatigue：Original shape-
Mechanical load deform-is warming up to martensite transfor mation end temp Af or more-restoring high-temperature-phase shape-and is cooled to austenite turn
Become end temp Mf or less-and restores low-temperature phase shape.Applicants have found that：Marmem is when undergoing phase transition, resistance
Rate is to react one of the sensitive physical amount of alloy internal structure change, and the relationship for fully understanding resistivity of material and mechanical property can
Quickly and easily to react its function fatigue properties.It is answered for example, material internal can be perceived by the change in resistance of monitoring SMA
Become and state the defects of crackle, cavity, to speculate the function damage degree of SMA element, and then dynamic adjust input current and
Resistance heat, to realize the feedback control of phase transformation.The present invention introduces resistivity measurement module compared with existing testing scheme,
It realizes in two-way shape memory alloy measured piece heat-mechanical cycles loading procedure to temperature, displacement, power, resistivity data
Acquisition in real time and storage, and the dynamic adjustment foundation of resistance heat input is provided, control phase transformation performance level.
2. the present invention uses control module of the microcontroller as system, collected data are sent to by the ends PC by serial ports
Host computer, and user's control instruction has been write in the ends PC host computer, easy to operate, easily controllable, reliability is high；Monolithic of the present invention
Machine is connected with pulling force sensor, temperature sensor, displacement sensor and resistivity measurement module, in two-way shape memory alloy quilt
Surveying realizes in part heat-mechanical cycles loading procedure to power, temperature, displacement, the real-time acquisition of resistivity data and storage, and carries
Foundation is adjusted for the dynamic of resistance heat input, controls phase transformation performance level.
3. the specimen holder device of the present invention can be by adjusting stepper motor to meet fixed different length alloy test specimen
Needs, control accuracy is high, reduces installation error；
4. the present invention uses integrated structure design, test needs, knot can be completed without other experimental facilities
Structure scalability is strong.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the overall structure diagram of the embodiment of the present invention 1；
Fig. 2 is the displacement sensor structure schematic diagram of the embodiment of the present invention 1.
Icon：100- measured pieces, 200- racks, 210- bottom plates, 220- side plates, the 230- test spaces, the acquisition of 300- data
Control system, 310- microcontrollers, 320- pulling force sensors, 321- bias springs, 330- temperature sensors, 340- displacement sensings
Device, 341- sensor bodies, the first guiding axis of 342-, the second guiding axis of 343-, the first sliding blocks of 342a-, the second sliding blocks of 342b-,
343a- third sliding blocks, 343b- Four-sliders, 344- mounting plates, 345- receiver boards, 350- resistivity measurement modules, 351- electricity
Pole, the ends 360-PC host computer, 400- mechanical load components, 410- screw slides, 411- slide unit plates, 412- leading screws, 413- nuts,
420- stepper motors, 430- gear assemblies, the first fixture blocks of 510-, the second fixture blocks of 520-, 521- bearings, 610- constant-current supplies,
620- relays, 700- cooling fans.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
Term " first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be directly connected, can also can be indirectly connected through an intermediary the connection inside two elements.
For the ordinary skill in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Embodiment 1
Fig. 1 is please referred to, the present embodiment provides a kind of two-way shape memory alloy heat-mechanical function fatigue properties test dresses
It sets, including rack 200, data acquisition control system 300, mechanical load component 400, clamp assemblies and power control system.Machine
Frame 200 includes bottom plate 210 and two side plates 220 for being relatively arranged on 210 side of bottom plate.Mechanical load component 400 includes leading screw
Slide unit 410 and stepper motor 420, screw slide 410 are set between two side plates 220, and bottom plate 210, side plate 220 and leading screw are slided
Platform 410 encloses the test space 230, and the leading screw 412 of screw slide 410 extends to the test space 230, stepper motor 420 and silk
Thick stick slide unit 410 is connected for driving leading screw 412.Clamp assemblies are set to the test space 230, and clamp assemblies include for quilt to be clamped
First fixture block 510 of 100 one end of part and the second fixture block 520 for 100 other end of measured piece to be clamped are surveyed, the first fixture block 510 is logical
Bearing 521 is crossed to connect with leading screw 412.By the way that bearing 521 is arranged, by the rotation of leading screw 412, moving up and down is converted to the first fixture block
510 up and down motion.Bearing 521 use air bearing 521, the degree of wear is fallen below it is minimum, so that it is guaranteed that precision is protected always
It is fixed to keep steady.In the present embodiment, in order to avoid holding position local temperature is excessively high, the first fixture block 510, the second fixture block 520 are equipped with resistance to
High-temperature insulation set is carrying out insulation processing with 110 contact site of measured piece.
Data acquisition control system 300 includes microcontroller 310, and the pulling force sensor being electrically connected with microcontroller 310
320, temperature sensor 330, displacement sensor 340 and resistivity measurement module 350, microcontroller 310 and 360 electricity of the ends PC host computer
Connection.Pulling force sensor 320 is set to bottom plate 210, and the second fixture block 520 is connected by bias spring 321 and pulling force sensor 320
It connects, leading screw 412, measured piece 100 and pulling force sensor 320 are located at same axial direction.Temperature sensor 330 is installed on side plate 220 and leans on
The side of the nearly test space 230 and between the first fixture block 510 and the second fixture block 520, in the present embodiment, temperature sensor
330 be infrared radiation thermometer, in other embodiments of the invention, can also use other contactless temperature sensors.Position
Displacement sensor 340 is installed on the test space 230 for monitoring by the displacement of side part.Resistivity measurement module 350 and measured piece 100
Electrical connection.Stepper motor 420 is electrically connected with microcontroller 310.Power control system includes constant-current supply 610 and and constant-current supply
The relay 620 of 610 connections, constant-current supply 610 are electrically connected with measured piece 100, and relay 620 is electrically connected with microcontroller 310.
Operation principle is：The present apparatus carries out heating to marmem test specimen using electrically heated mode and is heated to geneva
Body phase transition temperature controls temperature sensor 330, displacement sensor 340, pulling force sensor 320 and resistivity by microcontroller 310
Test module 350 is acquired the data during heat and mechanical load.Specifically, the optional meaning method of test system is partly led
Body STM32F4 series monolithics have been write as main control MCU for receiving data and sending the host computer procedure of instruction, use
Family can debug test device at 360 interface of the ends PC host computer and complete a series of test.Infrared temperature sensor
330 sides for being fixed on measured piece 100 are used to carry out real-time temperature measurement to measured piece 100, and displacement sensor 340 is to tested
Deflection of the part 100 in loading procedure is monitored in real time, and pulling force sensor 320 is connected with measured piece 100 for pulling force
It is monitored in real time.Collected data are input to list by temperature sensor 330, pulling force sensor 320 and displacement sensor 340
Piece machine 310 is stored, and microcontroller 310 is sent to the ends PC host computer 360 by way of serial communication.
Please refer to Fig. 2, in the present embodiment, displacement sensor includes sensor body 341, the first guiding axis 342 and second
Guiding axis 343, the first guiding axis 342 and the second guiding axis 343 are respectively arranged at measured piece 100 along the axial direction of measured piece 100
Both sides, the first guiding axis 342 are equipped with the first sliding block 342a, the second sliding block 342b, and the second guiding axis 343 is equipped with third sliding block
343a, Four-slider 343b are connected with mounting plate 344, mounting plate 344 and quilt between the first sliding block 342a and third sliding block 343a
Survey part 100 it is axially vertical, mounting plate 344 is fixedly connected with the first fixture block 540, the second sliding block 342b and Four-slider 343b it
Between be connected with receiver board 345, receiver board 345 is axially vertical with measured piece 100, and receiver board 345 and the second fixture block 520, which are fixed, to be connected
It connects.Sensor body 341 uses optical displacement sensor, and the light quantity generated is received plate blocking, so that it is determined that displacement, with
It measured piece shape to change, the distance between sensor body and receiver sheet change in real time, to realize measured piece
The real-time monitoring of deformation (displacement).
Clamp assemblies are for fixing marmem measured piece 100, and user passes through the ends PC host computer 360 and sends when test
For control instruction to microcontroller 310, microcontroller 310 receives the forward and reverse of control stepper motor 420 after control instruction to silk
Thick stick 412 carries out single-axis bidirectional control, completes the mechanical load (stretch or unload) to measured piece 100.By controlling stepper motor
420 meet different length marmem test specimen can be in pre-clamped condition.
In power control system, the break-make of constant-current supply 610 is controlled to measured piece 100 through relay 620 by microcontroller 310
It carries out input current adjustment and temperature is kept.In order to which the variation for accurately obtaining the resistivity in loading procedure of measured piece 100 is bent
Line, this test device measure resistivity using four electrode method, and resistivity measurement module 350 includes along measured piece 100
Axial four electrodes 351 arranged successively, two electrodes 351 of inside are electrically connected with potentiometer, two electrodes 351 in outside and
Galvanometer is electrically connected, and galvanometer, potentiometer are electrically connected with microcontroller 310, can be significantly using four electrode method measured resistivity
Error caused by reducing the contact resistance of connector.
To sum up, microcontroller 310 is also responsible for applying measured piece 100 other than the data to each sensor are acquired
Add mechanical load and controls the break-make realization heating down cycles of power supply, technical solution through the invention and test device, it can
To realize the automatic test of two-way shape memory alloy electric-thermal-mechanical function fatigue, two-way shape memory alloy test specimen is obtained
Stress during heat-mechanical cycles, strain, temperature, resistivity data variation curve, to evaluate its heat-mechanical function fatigue
Characteristic provides reference.
The present apparatus is additionally provided with cooling fan 700, and cooling fan 700 is set to the test space 230 and is located at the first fixture block
510 and second between fixture block 520, and cooling fan 700 is located at the side of measured piece 100, cooling fan 700 and 310 electricity of microcontroller
Connection, constant-current supply 610, relay 620, cooling fan 700 and measured piece 100 are composed in series heating-cooling circuit.
The concrete structure of the present embodiment, screw slide 410 is：Screw slide 410 includes slide unit plate 411 and is set to slide unit
The feed screw nut's assembly of plate 411, stepper motor 420 are installed on slide unit plate 411, and the nut 413 of feed screw nut's assembly passes through gear
Component 430 is engaged with the drive shaft of stepper motor 420, and using the above structure, present apparatus overall structure is more compact, and it is empty to save installation
Between.
Specific implementation mode is：Modules are installed according to Fig. 1 first, by 100 both ends of marmem measured piece
It is fixed on clamp assemblies and is connected with bias spring 321, constant-current supply 610 is electrically connected with measured piece 100, installs resistivity
Four electrodes 351 of measurement module, after powering on, at the ends PC, 360 interface of host computer adjusts stepper motor 420, stepper motor
420 driving leading screws 412 keep measured piece 100 in pre-clamped condition, complete the early-stage preparations of experiment.
By taking a cyclic process as an example, when test, mechanical load, the host computer 360 at the ends PC are carried out to measured piece 100 first
Elongation strain needed for the input of interface controls stepper motor 420 to stretch test specimen by leading screw 412 by microcontroller 310
To given strain, then the preset temperature of heat load is set in PC end subscribers interface, microcontroller 310 is controlled after receiving control instruction
Power control system processed is electrically heated measured piece 100, and when being heated to phase transition temperature or more, measured piece 100 starts to generate back
Multiple power is restored to high-temperature-phase shape, when infrared temperature measurement device detects that temperature reaches predicted temperature, stops heating, system enters temperature
Hold mode is spent, temperature is less than after preset temperature Power resumption at once.At the end of heating, power control system is closed, cooling wind
Fan 700 is started to work, and carries out fast cooling to measured piece 100, measured piece 100 starts to restore low-temperature phase shape.
In experiment, microcontroller 310 can carry out implementing to adopt to stress, strain, temperature, resistivity data during power cycle
Sample is simultaneously sent to the ends PC and is stored, and user can observe data in real time.By the data to acquisition carry out statistics and
Quantitative analysis can provide effective reference to evaluate the thermomechanical function fatigue properties of two-way shape memory alloy.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of two-way shape memory alloy heat-mechanical function fatigue characteristic testing device, which is characterized in that including rack, number
According to acquisition control system, mechanical load component, clamp assemblies and power control system；
The rack includes bottom plate and is relatively arranged on two side plates of bottom plate side；
The mechanical load component includes screw slide and stepper motor, the screw slide be set to two side plates it
Between, the bottom plate, side plate and screw slide enclose the test space, and the leading screw of the screw slide extends to the test sky
Between, the stepper motor is connect with the screw slide for driving the leading screw；；
The clamp assemblies are set to the test space, and the clamp assemblies include the first folder for measured piece one end to be clamped
Block and the second fixture block for the measured piece other end to be clamped, first fixture block are connect by bearing with the leading screw；
The data acquisition control system includes microcontroller, and is passed with the pulling force sensor of the monolithic mechatronics, temperature
Sensor, displacement sensor and resistivity measurement module, the microcontroller and the upper mechatronics in the ends PC；The pulling force sensor is set
It is placed in the bottom plate, second fixture block is connect by bias spring with the pulling force sensor, the leading screw, the measured piece
It is located at same axial direction with the pulling force sensor；The temperature sensor is installed on the side plate close to the one of the test space
Side and between first fixture block and second fixture block；Institute's displacement sensors are installed on the test space for supervising
It surveys by the displacement of side part；The resistivity measurement module is electrically connected with the measured piece；The stepper motor and the microcontroller
Electrical connection；
The power control system includes constant-current supply and the relay that is connect with the constant-current supply, the constant-current supply and quilt
Survey part electrical connection, the relay and the monolithic mechatronics.
2. two-way shape memory alloy heat-mechanical function fatigue characteristic testing device as described in claim 1, feature exist
In, further include cooling fan, the cooling fan be set to the test space and be located at first fixture block and described second
Between fixture block, the cooling fan and the monolithic mechatronics.
3. two-way shape memory alloy heat-mechanical function fatigue characteristic testing device as described in claim 1, feature exist
In the resistivity measurement module includes four electrodes arranged successively along the axial direction of measured piece, two electrodes of inside
Be electrically connected with potentiometer, two electrodes in outside are electrically connected with galvanometer, the galvanometer, the potentiometer with it is described
Monolithic mechatronics.
4. two-way shape memory alloy heat-mechanical function fatigue characteristic testing device as described in claim 1, feature exist
In the screw slide includes slide unit plate and is set to the feed screw nut's assembly of the slide unit plate, and the stepper motor is installed on
The nut of the slide unit plate, the feed screw nut's assembly is engaged by gear assembly with the drive shaft of the stepper motor.
5. two-way shape memory alloy heat-mechanical function fatigue characteristic testing device as described in claim 1, feature exist
In institute's displacement sensors include sensor body, the first guiding axis and the second guiding axis, first guiding axis and described
Two guiding axis are respectively arranged at the both sides of the measured piece along the axial direction of the measured piece, and first guiding axis is equipped with first and slides
Block, the second sliding block, second guiding axis are equipped with third sliding block, Four-slider, first sliding block and the third sliding block it
Between be connected with mounting plate, the mounting plate is axially vertical with the measured piece, and the mounting plate is fixed with first fixture block
Connection, is connected with receiver board, the axial direction of the receiver board and the measured piece between second sliding block and the Four-slider
Vertically, the receiver board is fixedly connected with second fixture block, and the sensor body uses optical displacement sensor.
6. two-way shape memory alloy heat-mechanical function fatigue properties test dress as described in any one of claim 1 to 5
It sets, which is characterized in that first fixture block, second fixture block are equipped with high-temperature insulation set.
7. two-way shape memory alloy heat-mechanical function fatigue properties test dress as described in any one of claim 1 to 5
It sets, which is characterized in that the temperature sensor is infrared radiation thermometer.
8. two-way shape memory alloy heat-mechanical function fatigue properties test dress as described in any one of claim 1 to 5
It sets, which is characterized in that the bearing is air bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810356246.0A CN108717025A (en) | 2018-04-19 | 2018-04-19 | A kind of two-way shape memory alloy heat-mechanical function fatigue characteristic testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810356246.0A CN108717025A (en) | 2018-04-19 | 2018-04-19 | A kind of two-way shape memory alloy heat-mechanical function fatigue characteristic testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108717025A true CN108717025A (en) | 2018-10-30 |
Family
ID=63899236
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| CN110108565A (en) * | 2019-06-05 | 2019-08-09 | 长春浩园试验机有限公司 | High frequency composite electron universal testing machine |
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| CN112683689A (en) * | 2020-12-24 | 2021-04-20 | 武汉天拓宇航智能装备有限公司 | Material characteristic test equipment |
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| CN109269893A (en) * | 2018-11-20 | 2019-01-25 | 西南交通大学 | A kind of material stress corrosion test macro and its test method based on image recognition |
| CN109405730A (en) * | 2018-12-05 | 2019-03-01 | 苏州麦乐加电子科技有限公司 | A kind of physical synthesis characteristic test device of filamentary material |
| CN109932599A (en) * | 2019-03-26 | 2019-06-25 | 吉林大学 | A kind of quiet dynamic driving characteristic integrated tester of automatically controlled shape-memory alloy wire |
| CN109932599B (en) * | 2019-03-26 | 2023-09-19 | 吉林大学 | Comprehensive tester for static and dynamic driving characteristics of electric control shape memory alloy wire |
| CN110108565A (en) * | 2019-06-05 | 2019-08-09 | 长春浩园试验机有限公司 | High frequency composite electron universal testing machine |
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| CN111238937A (en) * | 2020-02-27 | 2020-06-05 | 上海含骏自动化设备有限公司 | Metal wire fatigue test device |
| CN112630029A (en) * | 2020-12-15 | 2021-04-09 | 陕西航天技术应用研究院有限公司 | Meshed fabric mechanical property testing device |
| CN112630029B (en) * | 2020-12-15 | 2024-01-19 | 陕西航天技术应用研究院有限公司 | Net-shaped fabric mechanical property testing device |
| CN112683689A (en) * | 2020-12-24 | 2021-04-20 | 武汉天拓宇航智能装备有限公司 | Material characteristic test equipment |
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