CN110018071A - Failure detector based on impression measurement - Google Patents
Failure detector based on impression measurement Download PDFInfo
- Publication number
- CN110018071A CN110018071A CN201910308086.7A CN201910308086A CN110018071A CN 110018071 A CN110018071 A CN 110018071A CN 201910308086 A CN201910308086 A CN 201910308086A CN 110018071 A CN110018071 A CN 110018071A
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- Prior art keywords
- load cell
- fixedly connected
- institute
- measurement
- power transmission
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/08—Detecting presence of flaws or irregularities
-
- 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
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
-
- 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
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
-
- 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
-
- 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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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention proposes a kind of failure detectors based on impression measurement, its pressure head is fixedly connected with power transmission component, deformable protrusion is fixedly installed on power transmission component, one end of fluting cylinder and deformable projection contacts, the other end of fluting cylinder is fixedly connected with top cover is pushed, first load cell is set to the corresponding position of deformable protrusion so as to measure the pressure between deformable protrusion and fluting cylinder, the upper end of second load cell is fixedly connected with top cover is pushed, and is provided with gap between the lower end and power transmission component of the second load cell；When first sensor reaches maximum load, deformable convex curved deformation, gap disappear, and the second force snesor is directly contacted with power transmission component.By designing deformable protrusion and gap, the range of two load cells is superimposed, the measurement range to load force is increased.Also by the way that displacement sensor to be completely fixed in shell, influence of the load force to displacement measurement is eliminated, measurement accuracy is improved.
Description
Technical field
The present invention relates to a kind of failure detector, specifically a kind of failure detector based on impression measurement belongs to material
Detection field.
Background technique
Presently, there are the mechanical performance that various test can be used for test material, result can be used for engineering design,
The quality inspection of machine components and life estimate.The measuring mechanical property method of material, which can be divided mainly into, damages detection and non-destructive testing two
Major class.Non-destructive testing (Non-destructiveTesting, NDT) is in the case where not damaging measured material, to material
Surface or Inner Defect Testing.Micro- damage test method (Micro-destructiveTesting), which refers to, generates gently measured material
The test method of micro-damage.Since lossless or micro- damage test method has the advantages that non-destructive, Many researchers is attracted to exist
It explores in this respect.Non-destructive testing has many advantages, such as that the method time-consuming is few, and workload is small, high-efficient.With the height of automatic technology
The development and production of the sensor of speed development and high-performance, high-resolution and high stability, the feasibility of non-destructive testing is significantly
It improves.
Ultrasonic non-destructive measuring technology mainly utilizes back wave and other types caused by ultrasonic wave and test specimen interaction
Wave carry out material properties test, but use the test data of non-linear ultrasonic method of testing also seldom, also failing to find can be with
Generally applicable universal law.And a kind of new loseless method --- indentation test method, it can well solve in the above method
The problem of, the pressure head of certain shapes is pressed into measured material by indentation method, the mechanical property of material is predicted by impression response,
This method have it is easy to operate, it is high-efficient, measure the features such as accurate.Since compression distance is Nano grade, material can be recognized
To be nondestructive measurement, and on-line measurement may be implemented in this method.
Non-destructive testing based on indentation method can provide material property parameter abundant, such as hardness, and elasticity modulus, surrender is by force
Degree, tensile strength, breaking strength, elasticity and plasticity strain energy of distortion, strain hardening exponent etc..
However, based on the detection device of impression measurement, often only one sensor measures load force in the prior art
Power, its shortcoming is that range is short, measurement accuracy is low.In addition, the measurement result in load force effect bottom offset can also deviate,
The error of the displacement measurement as caused by the effect of load force can be still completely eliminated without device at present.
Summary of the invention
In view of the foregoing defects the prior art has, the purpose of the present invention is to propose to a kind of flaw detection dresses based on impression measurement
Set, can overcome the deficiencies in the prior art and increase range, improve measurement accuracy and eliminate load force displacement measurement is caused
Error.
The present invention provides a kind of failure detector based on impression measurement, including power sensing mechanism, the power sensing mechanism packet
It includes pressure head, power transmission component, fluting cylinder, deformable protrusion, push top cover, the first load cell and the second load cell,
The pressure head is fixedly connected with the power transmission component, and the deformable protrusion is fixedly installed on the power transmission component, described to open
The other end of one end of slot cylinder and the deformable projection contacts, the fluting cylinder is fixedly connected with the promotion top cover,
First load cell be set to the corresponding position of the deformable protrusion so as to measure it is described it is deformable protrusion with
Pressure between the fluting cylinder, the upper end of second load cell are fixedly connected with the promotion top cover, and described
Gap is provided between the lower end of two load cells and the power transmission component；When the first sensor reaches maximum load
When, the deformable convex curved deformation, the gap disappear, and second force snesor directly connects with the power transmission component
Touching.
It further include shell and bottom cover as further technical solution of the present invention, the power sensing mechanism is set to described
In shell, circular opening is offered on the bottom cover, the circular opening side is provided with materials for support part, and the pressure head is set
It is placed in the circular opening, special fixed bracket, the special support bracket fastened lower surface is fixedly installed in the shell
It is fixedly connected with the upper end of spring, the lower end of the spring is fixedly connected to keep the force measuring machine with the power transmission component
In floating state.
Further, drop-center is offered on the center pressure plate, the first dynamometry is provided in the drop-center
Sensor stand, first load cell are set to below the first load cell bracket, the deformable protrusion
It is set to above the center pressure plate.
It further, further include displacement measurement mechanism, the displacement measurement mechanism includes drive rod and displacement sensor, institute
Displacement sensors are fixedly installed on the special fixed bracket, and the upper end of the drive rod is set to institute's displacement sensors
Interior, the axis direction for cylinder of slotting described in the lower end edge of the drive rod, which passes through the power transmission component and fixes with the pressure head, to be connected
It connects.
Further, the special fixed bracket is fixedly connected with the shell, setting among the special fixed bracket
There is center hole, is provided with lid above the center hole, the lid is fixedly connected with the special fixed bracket, described
Displacement sensor is fixedly installed in the center hole.
Further, axial bore and radial hole are offered on the fluting cylinder, institute's displacement sensors are radially
Across the radial hole, the axial height of the radial direction hole is greater than the height of institute's displacement sensors to which the displacement passes
Sensor can be up and down relative to the fluting cylinder, and the drive rod passes axially through the axial bore and upper end is inserted into
In in institute's displacement sensors.
Further, the power transmission component includes pressure head bracket, lower pressure plate and center pressure plate, the pressure head bracket with
The pressure head is fixedly connected, and the lower pressure plate is fixedly connected with the pressure head bracket, the upper surface of the lower pressure plate and institute
It states center pressure plate to be fixedly connected, there are activity spaces between the lower pressure plate and the bottom cover.
Further, second load cell is connect by support section with the promotion top cover.
Further, the shell is fixedly connected with the bottom cover, and the bottom cover side is provided with protrusion part, described convex
Portion envelops are in the housing bottom peripheral side out.
Further, institute's displacement sensors, first load cell and the second load cell are adopted with data
Collect device signal connection.
The invention adopts the above technical scheme compared with prior art, has following technical effect that through design power sensing
The mechanical property of mechanism test material, wherein by designing deformable protrusion and gap, so that the range of two load cells
It can be superimposed, increase the measurement range to load force.
The measurement to depth of cup is realized by designing displacement measurement mechanism, and by the way that displacement sensor to be completely fixed
In shell, using the displacement between drive rod and displacement sensor, influence of the load force to displacement measurement is eliminated, is improved
Measurement accuracy.
Detailed description of the invention
Fig. 1 is the overall structure cross section view of the embodiment of the present invention.
Fig. 2 is the fluting cylindrical structure schematic diagram of the embodiment of the present invention.
Fig. 3 is the structural schematic diagram of the center pressure plate of the embodiment of the present invention.
Wherein: 1- pushes top cover；2- threaded hole；3- support section；4- fluting cylinder；5- fluting cylinder；6- displacement sensing
Device；7- center hole；8- lid；The first bolt of 9-；The second bolt of 10-；The special fixed bracket of 11-；12- conduit；13- second is surveyed
Force snesor；14- drop-center；15- spring；The first load cell of 16-；The deformable protrusion of 17-；18- center pressure plate；
The gap 19-；20- the first load cell bracket；21- pressure head bracket；22- pressure head；23- lower pressure plate；24- shell；25- protrusion
Part；26- bottom cover；27- materials for support part；28- circular opening.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, the present embodiment proposes a kind of failure detector based on impression measurement comprising shell 24, simultaneously
It is provided in top, bottom and pushes top cover 1 and bottom cover 26.Wherein, bottom cover 26 has protrusion part 25,26 lower central position of bottom cover
It installs in respect of being used to support in the materials for support part 27 on detected materials surface.It is opened inside materials for support part 27 for a circle
Hole 28 has in hole and is mounted on pressure head bracket 21 for the pressure head 22 of replacement.The shaft core position of top cover 1 is pushed to be furnished with threaded hole 2,
For clamping hardometer or other loading mechanisms.It pushes the lower section of top cover 1 and pushes section support section 3 and fluting 4 phase of cylinder
Consolidation.Spring 15 is enclosed in the lower half portion of fluting cylinder 4, and 15 upper end of spring is linked with special fixed bracket 11, lower end and
Center pressure plate 18 is coupled.Spring 15 is in pico- tensional state under natural conditions, plays the role of pull-up center pressure plate 18.
Fig. 2 is the structural schematic diagram of fluting cylinder.The radial square hole slot of fluting cylinder 4 is for installing displacement sensor in figure
6.Axial bore is the driving stock 5 for installing displacement sensor 6, the lower end for cylinder of slotting with can deformation protrusion 17 closely connect
Touching.
It acts on and the load force on top cover 1 is pushed to be transmitted to pressure head bracket 21 by support section 3, then pass to pressure head
22, support section 3 can move up and down in the housing, and be sticked together with the second load cell 13.Load force passes through the
Two force snesors 13 push center pressure plate 18, and center pressure plate 18 has drop-center 14, there is the in the drop-center 14
One load cell bracket 20, there are two the first load cells 16 for installation on the first load cell bracket 20.It is deformable convex
17 are played to extend from the top of central pressure plare 18.The lower section of center pressure plate 18 is sticked together with lower pressure plate 23.
Assuming that 16 maximum load power of the first force snesor is 200N, due to deformable raised 17 presence, in center pressure
There is gap 19 between plate 18 and the second force snesor 13.Before load force reaches 200N, the first load cell is used
16 measurements, after being greater than 200N load force, deformable raised 17 bending, bending degree is it is found that and correspond to gap 19
Width.After gap 19 is disappeared by compression, the second force snesor 13 is directly contacted with center pressure plate 18.At this point, load force is not
Again by the first load cell 16, but measured by the second load cell 13 of larger range.In order to realize two power
The precision of the superposition of range between sensor, the second force snesor 13 need to be higher than the 1/10 of the first force snesor 16.In this example
In, the maximum load power of the first force snesor 16 is 200N, then the measurement accuracy of the second force snesor 13 necessarily is greater than 20N, example
Such as select measurement accuracy for the second force snesor of 10N.This realizes two kinds of load cell in same range
The overlapping of measurement data.
Pass through the displacement of drive rod 5 using displacement sensor 6, measures position or the depth of cup at the tip of pressure head 22, position
Displacement sensor 6 needs the precision not less than 0.1 micron.
In order to eliminate influence of the load force to 6 measurement accuracy of displacement sensor, displacement sensor 6 be mounted on one it is special solid
On fixed rack 11, special fixed bracket 11 is fixed on shell 24 with the second bolt 10.There is one in special fixed bracket 11
Center hole 7, for installing displacement sensor 6.Lid 8 is fixed on special fixed bracket 11 by the first bolt 9, will be displaced
Sensor 6 is fixed in center hole 7.Conduit 12 is arranged at the lower part of special fixed bracket 11.Drive rod 5 is along conduit 12, installation
Into displacement sensor 6.
It acts on and the power on top cover 1 is pushed to be directly delivered to second by the support section 3 around special fixed bracket 11
On load cell 13.Displacement sensor 6 is relative to the position of special fixed bracket 11 and special fixed bracket 11 relative to shell
The position of body 24 is completely fixed.Drive rod 5 passes through displacement sensor 6, and will not deform caused by by any load power
Influence.Displacement is directly delivered on the pressure head bracket 21 of pressure head 22 by said mechanism.
Displacement sensor, the first load cell and the second load cell pass through cable or signal projector and data
The connection of equipment (such as computer) signal is acquired, then data are handled by host computer.
In use, to 1 one downward load forces of top cover are pushed, pressure head 22 is made downwards by internal structure transmission has and is micro-
Thin tail sheep is applied on testee.Pressure head 22 is connected to measure displacement with the drive rod 5 in displacement sensor.Together
When inside there are two force snesor, range is different, and precision is different.Since structure designs, first contacted on central pressing plate when being pressed downward
The first force snesor 16, until exceed the first 16 range of force snesor when, just the second force snesor 13 contact center pressure
Plate 18 starts to measure.
The present invention by design power sensing mechanism test material mechanical property, wherein by design it is deformable protrusion and
Gap enables the range of two load cells to be superimposed, and increases the measurement range to load force.Also surveyed by design displacement
Measuring mechanism realizes the measurement to depth of cup, and by the way that displacement sensor to be completely fixed in shell, using drive rod and
Displacement between displacement sensor eliminates influence of the load force to displacement measurement, improves measurement accuracy.
The above, the only specific embodiment in the present invention, but scope of protection of the present invention is not limited thereto, appoints
What is familiar with the people of the technology within the technical scope disclosed by the invention, it will be appreciated that expects transforms or replaces, and should all cover
Within scope of the invention, therefore, the scope of protection of the invention shall be subject to the scope of protection specified in the patent claim.
Claims (10)
1. a kind of failure detector based on impression measurement, including power sensing mechanism, it is characterised in that: the power sensing mechanism includes
Pressure head, fluting cylinder, deformable protrusion, pushes top cover, the first load cell and the second load cell, institute at power transmission component
It states pressure head to be fixedly connected with the power transmission component, the deformable protrusion is fixedly installed on the power transmission component, the fluting
The other end of one end of cylinder and the deformable projection contacts, the fluting cylinder is fixedly connected with the promotion top cover, institute
It states the first load cell and is set to the corresponding position of the deformable protrusion so as to measure the deformable protrusion and institute
The pressure between fluting cylinder is stated, the upper end of second load cell is fixedly connected with the promotion top cover, and described second
Gap is provided between the lower end of load cell and the power transmission component；When the first sensor reaches maximum load,
The deformable convex curved deformation, the gap disappear, and second force snesor is directly contacted with the power transmission component.
2. the failure detector according to claim 1 based on impression measurement, it is characterised in that: it further include shell and bottom cover,
The power sensing mechanism is set in the shell, and circular opening, the circular opening side setting are offered on the bottom cover
There is materials for support part, the pressure head is set in the circular opening, special fixed bracket is fixedly installed in the shell,
The special support bracket fastened lower surface is fixedly connected with the upper end of spring, and the lower end of the spring is fixed with the power transmission component
Connection is to keep the force measuring machine to be in floating state.
3. the failure detector according to claim 2 based on impression measurement, it is characterised in that: opened on the center pressure plate
Equipped with drop-center, the first load cell bracket is provided in the drop-center, first load cell is set to
Below the first load cell bracket, the deformable protrusion is set to above the center pressure plate.
4. the failure detector according to claim 3 based on impression measurement, it is characterised in that: further include displacement measurement machine
Structure, the displacement measurement mechanism include drive rod and displacement sensor, and institute's displacement sensors are fixedly installed on described special solid
On fixed rack, the upper end of the drive rod is set in institute's displacement sensors, circle of slotting described in the lower end edge of the drive rod
The axis direction of column passes through the power transmission component and is fixedly connected with the pressure head.
5. it is according to claim 4 based on impression measurement failure detector, it is characterised in that: the special fixed bracket with
The shell is fixedly connected, and center hole is provided among the special fixed bracket, is provided with lid above the center hole
Son, the lid are fixedly connected with the special fixed bracket, and institute's displacement sensors are fixedly installed in the center hole.
6. the failure detector according to claim 5 based on impression measurement, it is characterised in that: opened up on the fluting cylinder
There are axial bore and radial hole, institute's displacement sensors pass radially through the radial hole, the axial direction of the radial direction hole
Highly greater than the height of institute's displacement sensors to which institute's displacement sensors can be up and down relative to the fluting cylinder,
The drive rod passes axially through the axial bore and upper end is inserted in institute's displacement sensors.
7. the failure detector according to claim 6 based on impression measurement, it is characterised in that: the power transmission component includes pressure
Head bracket, lower pressure plate and center pressure plate, the pressure head bracket are fixedly connected with the pressure head, the lower pressure plate with it is described
Pressure head bracket is fixedly connected, and the upper surface of the lower pressure plate is fixedly connected with the center pressure plate, the lower pressure plate with
There are activity spaces between the bottom cover.
8. the failure detector according to claim 7 based on impression measurement, it is characterised in that: second load cell
It is connect by support section with the promotion top cover.
9. the failure detector according to claim 8 based on impression measurement, it is characterised in that: the shell and the bottom cover
It is fixedly connected, the bottom cover side is provided with protrusion part, and the protrusion subpackage is wrapped in the housing bottom peripheral side.
10. the failure detector according to claim 9 based on impression measurement, it is characterised in that: institute's displacement sensors, institute
It states the first load cell and the second load cell is connect with data acquisition equipment signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308086.7A CN110018071A (en) | 2019-04-17 | 2019-04-17 | Failure detector based on impression measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308086.7A CN110018071A (en) | 2019-04-17 | 2019-04-17 | Failure detector based on impression measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110018071A true CN110018071A (en) | 2019-07-16 |
Family
ID=67191618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910308086.7A Pending CN110018071A (en) | 2019-04-17 | 2019-04-17 | Failure detector based on impression measurement |
Country Status (1)
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| CN (1) | CN110018071A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455615A (en) * | 2019-09-04 | 2019-11-15 | 山东交通学院 | A kind of floating boots lock cushion dynamometry supporting leg for road surface accelerating and loading experimental |
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| CN202486006U (en) * | 2012-03-13 | 2012-10-10 | 沈阳天星试验仪器有限公司 | Portable digital display hardness measuring device |
| CN103925385A (en) * | 2014-04-11 | 2014-07-16 | 北京中科科仪股份有限公司 | Vacuum valve and conductance-switchable vacuum valve |
| US20160377518A1 (en) * | 2015-06-23 | 2016-12-29 | Ceske Vysoke Uceni Technicke V Praze, Fakulta Strojni | An indentation device, instrumented measurement system, and a method for determining the mechanical properties of materials by the indentation method |
| CN109540347A (en) * | 2018-12-13 | 2019-03-29 | 苏州汇才土水工程科技有限公司 | The novel force snesor group of multiple range cascaded structure in high precision |
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2019
- 2019-04-17 CN CN201910308086.7A patent/CN110018071A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101526452A (en) * | 2009-04-16 | 2009-09-09 | 莱州华银试验仪器有限公司 | Automatic turret type electronic mainshaft measuring unit of Brinell hardness tester |
| CN202486006U (en) * | 2012-03-13 | 2012-10-10 | 沈阳天星试验仪器有限公司 | Portable digital display hardness measuring device |
| CN103925385A (en) * | 2014-04-11 | 2014-07-16 | 北京中科科仪股份有限公司 | Vacuum valve and conductance-switchable vacuum valve |
| US20160377518A1 (en) * | 2015-06-23 | 2016-12-29 | Ceske Vysoke Uceni Technicke V Praze, Fakulta Strojni | An indentation device, instrumented measurement system, and a method for determining the mechanical properties of materials by the indentation method |
| CN109540347A (en) * | 2018-12-13 | 2019-03-29 | 苏州汇才土水工程科技有限公司 | The novel force snesor group of multiple range cascaded structure in high precision |
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| CN110455615A (en) * | 2019-09-04 | 2019-11-15 | 山东交通学院 | A kind of floating boots lock cushion dynamometry supporting leg for road surface accelerating and loading experimental |
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Application publication date: 20190716 |
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