CN109883308A - Assembling multipurpose strain gauge sensors - Google Patents
Assembling multipurpose strain gauge sensors Download PDFInfo
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- CN109883308A CN109883308A CN201910317080.6A CN201910317080A CN109883308A CN 109883308 A CN109883308 A CN 109883308A CN 201910317080 A CN201910317080 A CN 201910317080A CN 109883308 A CN109883308 A CN 109883308A
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- connecting rod
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- spring leaf
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Abstract
A kind of assembling multipurpose strain gauge sensors, upper end cover is set in the intracorporal upper end of shell, set end cap in lower end, left spring piece and right spring leaf are set in shell, cushion block and lower cushion block are set between left spring piece and right spring leaf, the top of left spring piece and right spring leaf is located in the fixing end fixture block under upper end cover, foil gauge is set on left spring piece and right spring leaf, the one end for interting in shell and being set with the auxiliary connecting rod of spacing collar is located on left spring piece and right spring leaf, the other end of auxiliary connecting rod sets the left connecting rod coupled with right support abutment, left support abutment is set on lower cover, hard and soft dual-purpose coupling mechanism is set between left connecting rod and right support abutment, left connecting rod and hard and soft dual-purpose coupling mechanism constitute hard and soft dual-purpose connecting rod.The present invention makes left spring piece and right spring leaf deform by hard and soft dual-purpose connecting rod, and foil gauge experiences left spring piece and right Spring deformation size, is output to deformeter through output lead, can the small strain of measurement structure and the big strain of measurement structure.
Description
Technical field
The invention belongs to measure the equipment technical field of relative displacement, and in particular to arrive the strain measurement of assembling multipurpose
Sensor.
Background technique
In bridge and various building structure construction engineering tests, service life assessment, Disease Cause Analysis, new structure
In type approval test research, strain is typically required one of Main physical amount of observation.Measurement concrete structure strains institute at present
There are mainly two types of the concrete strain measurement meters of use.One is foil gauge, foil gauge is affixed directly to structures when use
Detection site.The work such as patch, bonding wire, mounting usually carry out in several meters or even tens meters of high-altitude, and difficulty is bigger, quality
It is difficult to ensure that efficiency is at a fairly low, and measured value is influenced very greatly by environment temperature and ambient humidity, often measured values of some points
It drifts about very big, measurement data is with a low credibility.Another is arch strain gauge, and the primary structure of the strain gauge is in a piece of volume
Bigger and thick arcuate resilient device on piece is bonded with foil gauge, and arcuate resilient device piece needs special metal die to suppress
It being made, processing is complicated, and the stiffness of high production cost, arcuate resilient device piece is big, have an impact to the strain on sensor component surface, institute
The data of calibration are inaccurate, and stability is poor.Especially this strain gauge both ends are all pasted on the support, can not simultaneously when disassembly
Both ends support is removed, very big so as to cause strain gauge sensitive part stress, strain gauge is easy to be damaged, and cause correction factor to change,
So that measuring result error is larger.
Chinese patent " double cantilever concrete structure strain measurement meters ", application No. is 200320109969.X solve it is above-mentioned
Problem, but the strain gauge is not capable of measuring big strain, both when component generates plastic deformation or reinforced concrete member band crack
Strain when work.
Summary of the invention
Technical problem to be solved by the present invention lies in the above-mentioned prior art is overcome, providing one kind can either be measured
The small strain of concrete component, and the assembling multipurpose strain measurement sensing of concrete component strained greatly can be measured
Device.
Solving technical solution used by above-mentioned technical problem is: a kind of assembling multipurpose strain gauge sensors,
Including shell, the intracorporal upper end of shell is provided with upper end cover, lower end is provided with lower cover, be provided in shell left spring piece and
Right spring leaf is provided with cushion block and lower cushion block, the top of left spring piece and right spring leaf between left spring piece and right spring leaf
It is arranged in the fixing end fixture block under upper end cover, answering of being connected with output lead is provided on left spring piece and right spring leaf
Become piece, the one end for interting in shell and being set with the auxiliary connecting rod of spacing collar is arranged on left spring piece and right spring leaf, auxiliary
It helps the other end of connecting rod that the left connecting rod coupled with right support abutment is set, left support abutment is provided on lower cover, in left connecting rod and right support abutment
Between be provided with hard and soft dual-purpose coupling mechanism, left connecting rod and hard and soft dual-purpose coupling mechanism constitute hard and soft dual-purpose connecting rod.
Preferably, hard and soft dual-purpose coupling mechanism of the invention includes sleeve, connects left connecting rod, the other end in one end of sleeve
It is provided with right connecting rod, the other end setting of right connecting rod is provided with fixed glue-line, Zuo Lian on right support abutment, between sleeve and left connecting rod
Elastic element is set between bar and right connecting rod.
Preferably, active length 0.008m~1m of hard and soft dual-purpose connecting rod (36).
Preferably, left connecting rod and right connecting rod select indium steel wire rod to be made.
Preferably, left connecting rod and the length of right connecting rod, diameter are all the same.
Preferably, 2.5~6mm of left connecting rod diameter, 2.5~6mm of the right connecting rod diameter.
Preferably, right connecting rod is equipped with scale value.
Preferably, elastic element is spring.
Preferably, spring one end passes through left connecting rod and is fixedly connected on left connecting rod by epoxy glue, and the other end passes through right connecting rod
Right connecting rod is fixedly connected on by epoxy glue.
Preferably, spring rate 1.22mm/N~0.42mm/N.
Present invention employs making left spring piece and right spring leaf deform by hard and soft dual-purpose coupling mechanism, it is bonded in a left side
The foil gauge of spring leaf and right spring leaf experiences left spring piece and right Spring deformation size, is output to strain through output lead
Instrument measures the strain value that concrete component is tested position, assembling multipurpose strain measurement can be made to pass by calibration coefficient
Sensor can the small strain of measurement structure and the big strain of measurement structure, extend the application range of the sensor, this hair
Bright structure is simple, easily uses, low cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of the invention；
Fig. 2 is calibration principle schematic diagram of the present invention；
Fig. 3 is displacement-strain curve figure of table one；
Fig. 4 is displacement-strain curve figure of table two；
Fig. 5 is displacement-strain curve figure of table three；
1- shell；2- upper end cover；3- left spring；4- output lead；The upper cushion block of 5-；The upper foil gauge of 6-；7- fixing end fixture block；8- is right
Spring leaf；Foil gauge under 9-；10- auxiliary connecting rod；11- spacing collar；12- left connecting rod；13- sleeve；14- fixes glue-line；15- bullet
Spring；16- fixing screws；17- right connecting rod；18- right support abutment；19- lower cover；20- lower cushion block；21- left support abutment；22- nut；31-
Data collecting instrument；32- restraint screw；34- adjusts height cushion block；35- dial gauge calibrating instrument pedestal；The hard and soft dual-purpose connecting rod of 36-；
37- connecting sleeve；38- calibrating instrument gauge head；39- gauge head mobile mechanism.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.The drawings are for illustrative purposes only and are merely schematic diagrams, rather than pictorial diagram, should not be understood as
Limitation to this patent, specific embodiment in order to better illustrate the present invention, the certain components of attached drawing, which have, to be zoomed in or out,
The size of actual product is not represented, it will be understood by those skilled in the art that certain known features and its explanation may save in attached drawing
Slightly will be understood by, it also should be noted that, illustrate only for ease of description, in attached drawing with part of the invention and
Not all structure.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, shall fall within the protection scope of the present invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to what the present invention protected
Range.
As shown in Figure 1, the assembling multipurpose strain gauge sensors of the present embodiment are by shell 1, upper end cover 2, left bullet
Reed 3, output lead 4, upper cushion block 5, upper foil gauge 6, fixing end fixture block 7, right spring leaf 8, lower foil gauge 9, auxiliary connecting rod 10,
Spacing collar 11, left connecting rod 12, sleeve 13, fixed glue-line 14, spring 15, fixing screws 16, right connecting rod 17, right support abutment 18, lower end
Lid 19, lower cushion block 20, left support abutment 21, the connection of nut 22 are constituted, middle sleeve 13, fixed glue-line 14, spring 15, fixing screws
16, the connection of right connecting rod 17 constitutes hard and soft dual-purpose coupling mechanism.
Upper end in shell 1 is led on the outer end face of lower cover 19 using having upper end cover 2, lower end using there is lower cover 19
Thread connection is crossed using there is left support abutment 21, the side of the symmetrical center line in shell 1, which uses, has left spring piece 3, the other side to use
There is right spring leaf 8, left spring piece 3 and right spring leaf 8 are used to experience the relative displacement of concrete component, and generate deformation, left bullet
Between reed 3 and right spring leaf 8 it is upper using have upper cushion block 5, it is lower using there is a lower cushion block 20, left spring piece 3 and right spring leaf 8 it is upper
Portion is inserted and secured in fixing end fixture block 7, and fixing end fixture block 7 is using in 2 lower part of upper end cover, left spring piece 3 and right spring leaf 8
With a thickness of 0.6mm, the length of left spring piece 3 and right spring leaf 8 is 60mm, the distance between left spring piece 3 and right spring leaf 8
For 5mm, pass through the length of the thickness or left spring piece 3 and right spring leaf 8 of change left spring piece 3 and right spring leaf 8, it is easy to ground
Output sensitivity and strain measurement range of the invention are adjusted, the concrete strain measurement of various different resolutions can be produced
Meter.It is bonded with upper foil gauge 6 on the lateral surface of left spring piece 3, upper foil gauge 6 is bonded on the lateral surface of right spring leaf 8,
It is bonded with lower foil gauge 9 under the lateral surface of left spring piece 3, lower foil gauge 9 is bonded under the lateral surface of right spring leaf 8,
Upper foil gauge 6 and lower foil gauge 9 can be bonded on the medial surface of left spring piece 3 and right spring leaf 8, upper foil gauge 6 and under answer
Become piece 9 to be connected with output lead 4, the deformation that left spring piece 3 and right spring leaf 8 are occurred for upper foil gauge 6 and lower foil gauge 9
It is exported through output lead 4.The lower part of left spring piece 3 and right spring leaf 8, which is threaded to use, in shell 1 auxiliary connecting rod
10, the right end of auxiliary connecting rod 10 is machined with internal screw thread, left end nut 22 is fixed on the lower part of left spring piece 3 and right spring leaf 8,
The right end of auxiliary connecting rod 10 stretches out outside the right side of shell 1, and spacing collar 11, spacing collar are set in the right side of auxiliary connecting rod 10
11 for limiting left spring piece 3 and right spring leaf 8 moves right in a certain range.The right end of auxiliary connecting rod 10 is solid by screw thread
Surely it is connected in one end of left connecting rod 12, the other end of left connecting rod 12 is provided with hard and soft dual-purpose coupling mechanism, left connecting rod 12 and hard and soft
Dual-purpose coupling mechanism constitutes hard and soft dual-purpose connecting rod 36.
The hard and soft dual-purpose coupling mechanism of the present embodiment includes sleeve 13, and one end of sleeve 13 is sleeved on outside left connecting rod 12, set
Fixed glue-line 14, the other end fixing screws 16 of sleeve 13 are formed after using glue sticking, gelling solid between cylinder 13 and left connecting rod 12
It is fixedly connected on right connecting rod 17, right connecting rod 17, which is screwed on right support abutment 18, (to be not limited to screw to fix, can also select
Other fixed forms), sleeve 13 combines as a whole left connecting rod 12 and right connecting rod 17, becomes rigid link.Left connecting rod 12 and right company
Elastic element is used between bar 17, the elastic element of the present embodiment is spring 15, and other elastic elements can also be used, unclamp sleeve
13 combine as a whole left connecting rod 12 and right connecting rod 17 with the screw 16 that is connected and fixed of right connecting rod 17, spring 15, become flexible link,
Hard and soft dual-purpose connecting rod can make assembling multipurpose strain gauge sensors can measurement structure small strain (concrete structure
Under normal operation), and the big strain (in the case of concrete structure cracking) of concrete structure can be measured, extend the biography
The application range of sensor.When left support abutment 21 and right support abutment 18 are used to measure the strain of building member, by left support abutment 21 and right branch
Seat 18 uses glue sticking on detected concrete component, when surface of concrete structure generates stretching or compressive deformation, left support abutment 21
Relative displacement occurs between right support abutment 18, so that left spring piece 3 and right spring leaf 8 is deformed by hard and soft dual-purpose connecting rod, glues
It connects and experiences left spring piece 3 and the change of right spring leaf 8 in the upper foil gauge 6 in 8 outside of left spring piece 3 and right spring leaf and lower foil gauge 9
Shape size, is converted into electric signal, is output to deformeter (or data collecting instrument) through output lead 4, by calibration coefficient, can measure
Concrete component is tested the strain value at position.
The optional stainless steel material of shell 1 is made, the active length of hard and soft dual-purpose bar 36 according to gauge length to be measured it needs to be determined that, choosing
Can be more than 1m with 0.008m to 1m, optional 0.008m, 0.01m, 0.02m, 0.03m, 0.04m, 0.05m, 0.06m, 0.07m,
0.08m、0.09m、0.10m、0.15m、0.20m、0.25m、0.30m、0.35m、0.40m、0.45m、0.50m、0.50m、
0.55m, 0.60m, 0.65m, 0.70m, 0.75m, 0.80m, 0.85m, 0.90m, 0.95m, 1m can be more than 1m, consider to reduce temperature
Degree influences, and left connecting rod 12, right connecting rod 17 preferably select the production of indium steel wire rod, based on left connecting rod 12 and right connecting rod 17 it is sturdy and durable,
Sensitivity and cost consideration, 12 diameter of left connecting rod is from 2.5mm to 6mm, optional 2.5mm, 3mm, 4mm, 5mm, 6mm, right connecting rod 17
Diameter is from 2.5mm to 6mm, optional 2.5mm, 3mm, 4mm, 5mm, 6mm, for convenience of processing, left connecting rod 12 and right connecting rod 17 it is straight
Diameter is identical with length, left connecting rod 12, spring, sleeve 13, right connecting rod 17, constitutes hard and soft dual-purpose bar, moves the right side along right connecting rod 17
Support 18, control the junction (A point) of left connecting rod 12 and spacing collar 11 to 18 junction of right connecting rod 17 and right support abutment (B point) away from
From (active length of as hard and soft dual-purpose bar 36)；The connection type of left connecting rod 12, right connecting rod 17 and spring 15 are as follows: spring 15 1
End is fixedly connected on left connecting rod 12 by epoxy glue across left connecting rod 12, and the other end passes through right connecting rod 17 and connects by the way that epoxy glue is fixed
Be connected to right connecting rod 17, epoxy adhesive curing is convenient, adhesion strength is strong, chemical stability is good, good stability of the dimension, the internal diameter of spring 15 and
Left connecting rod 12, the diameter of right connecting rod 17 are identical；15 rigidity of spring mainly determines by the maximum deformation quantity of required measurement, can be from
1.22mm/N~0.42mm/N, in engineering practice, minimum can arrive 0.05mm/N, and maximum can arrive 1.5mm/N；When 15 rigidity of spring,
15 thickness of spring (diameter), spring 15 internal diameter determine in the case where, the active length of spring 15 determines that, spring 15 it is straight
Optional 0.1mm~the 0.3mm of diameter.
Left support abutment 21 of the invention and right support abutment 18 use glue sticking on detected concrete component, detected concrete component
After crack occurs in tested position, deformation will be sharply increased, if being tested the sensor at position using rigidity in concrete component
Connecting rod, then being transmitted to the deformation being bonded on the upper foil gauge 6 and lower foil gauge 9 in 8 outside of left spring piece 3 and right spring leaf will be fast
Speed makes its disablement beyond its range ability, according to the big strain of flexible link measurement structure, because by adopting
It is changed to the flexible link with spring 15 with rigid link on a sensor, spring will offset a part deformation, and can
The size for offsetting deformation is adjusted by changing the rigidity of spring 15, the deformation balanced out ensure that transmits in large deformation
Deformation on to the upper foil gauge 6 and lower foil gauge 9 for being bonded in 8 outside of left spring piece 3 and right spring leaf is without departing from its amount
Journey range and it can be made to continue working, reduce the rigidity of former elastic construction, make its deform range by change spring 15 it is rigid
Degree expands the application range of original sensor to adjust.In order to be included in the deformation of spring counteracting, to the flexible link that spring is housed
Sensor be output to the coefficient of deformeter and re-start calibration, so that it may the sensor for obtaining the flexible link with spring 15 is defeated
Arrive the coefficient of deformeter out, therefore, using rigid link and using different 15 rigidity of spring flexible link, sensor it is defeated
The coefficient for arriving deformeter out is different, using the sensitivity coefficient respectively newly demarcated, is just included in the deformation of spring counteracting, accurately
Obtain the deflection of concrete component.
Rating test
Data collecting instrument (being called deformeter) model: TDS-602 manufacturer: Japanese TML
Amesdial calibrating instrument model: SJ3000 manufacturer: scheme in Shenzhen
As shown in Figure 2: amesdial calibrating instrument (is not limited to the amesdial calibrating instrument of the SJ3000 model of figure in Shenzhen, can also adopt
The amesdial calibrating instrument produced with other producers) it include calibrating instrument pedestal 35, calibrating instrument gauge head 38 and gauge head mobile mechanism 39,
Calibrating instrument gauge head 38 and gauge head mobile mechanism 39 connect, and gauge head mobile mechanism 39 drives calibrating instrument gauge head 38 mobile, and the present invention is done
When rating test, left support abutment 21 of the invention is fixed on and is adjusted in height cushion block 34, adjusted height cushion block 34 and be then fixed on inspection
Determine on instrument pedestal 35, hard and soft dual-purpose connecting rod 36 of the invention passes through two restraint spiral shells in connecting sleeve 37 and connecting sleeve 37
Nail 32 is connected with calibrating instrument gauge head 38, wherein restraint screw 32 and casing 37 are by hard and soft dual-purpose connecting rod 36 and calibrating instrument gauge head 38
It is fixedly connected, when gauge head mobile mechanism 39 drives calibrating instrument gauge head 38 is mobile to generate a determining displacement, passes through with the present invention defeated
The data collecting instrument 31(that conducting wire 4 connects out is not limited to the model TDS-602 data collecting instrument of Japanese TML production, can also use
The data collecting instrument or deformeter of other producer's productions) just show that one determines that strain value works as calibrating instrument using " method of addition "
When gauge head 38 moves at equal intervals, so that it may one group of displacement, strain data are obtained, according to this available displacement-strain curve, it is thus bent
Output sensitivity coefficient value of the invention can be obtained in line.Spring 15 among hard and soft dual-purpose connecting rod 36 is selected axially different rigid
When the spring of degree, available different displacement-strain curve, to calculate different sensor output sensitivity coefficients
Value.
Test one: hard and soft dual-purpose connecting rod 36 of the invention uses 1#Rigid link, 1#Rigid link: axial rigidity is unlimited
(i.e. sleeve 13 combines as a whole left connecting rod 12 and right connecting rod 17 as rigid link) greatly
Using 1#Rigid link calibration result is as shown in Table 1, and displacement curve figure is as shown in Figure 3.
Table one uses 1#Rigid link calibration result
By test one it is found that using 1# rigid link, it is opposite when sensor exports 1008.6 μ ε can to measure 0-0.1000mm
Displacement.
Test two: hard and soft dual-purpose connecting rod 36 of the invention uses 2# Flexible link, 2#Flexible link: left connecting rod 12 and right company
The axial rigidity 0.42mm/N of spring 15 is used among bar 17.
Using 2#Rigid link calibration result is as shown in Table 2, and displacement curve figure is as shown in Figure 4.
Table two uses 2#Flexible link calibration result
By test two it is found that using 2#Flexible link can measure 0-1.060mm relative displacement when sensor exports 996 μ ε
Amount.
Experiment three: hard and soft dual-purpose connecting rod 36 of the invention uses 3# Flexible link, 3#Flexible link: left connecting rod 12 and right company
The 15 axial rigidity 1.22mm/N of spring used among bar 17
Using 3#Flexible link calibration result is as shown in Table 3, and displacement curve figure is as shown in Figure 5.
Table three uses 3#Flexible link calibration result
By test three it is found that using 3#Flexible link can measure 0-3.050mm relative displacement when sensor exports 995 μ ε
Amount.
Seen by rating test data, it is smaller using 15 rigidity of spring among left connecting rod 12 and right connecting rod 17, it can survey
The relative shift range of amount is bigger, and 15 length of spring and rigidity can according to need change, and the present invention is using different-stiffness
Spring 15 can measure the strain of the different range of concrete structure using the good sensitivity coefficient of the invention of preceding calibration.
The use of hard and soft dual-purpose connecting rod 36 can make the small strain (concrete structure of the invention for being both capable of measuring concrete structure
Under normal operation), and the big strain (in the case of concrete structure cracking) of concrete structure can be measured, extend the biography
The application range of sensor.
It varies in addition, being measured concrete structure, to adapt to different size of concrete structure, hard and soft dual-purpose connecting rod
36 active length range is adjustable by mobile right support abutment 18, and further, right connecting rod is equipped with scale value, hard and soft dual-purpose connecting rod
36 active lengths pass through after mobile right support abutment 18 adjusts can intuitively read gauge length very much, do not need scale and determine hard and soft two
With the gauge length adjusted of connecting rod 36, use of the invention is facilitated.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (10)
1. a kind of assembling multipurpose strain gauge sensors, including shell (1), the upper end in shell (1) are provided with
End cap (2), lower end are provided with lower cover (19), are provided with left spring piece (3) and right spring leaf (8), left spring in shell (1)
It is provided with cushion block (5) and lower cushion block (20) between piece (3) and right spring leaf (8), left spring piece (3) and right spring leaf (8)
Top is arranged in fixing end fixture block (7) under upper end cover (2), be provided on left spring piece (3) and right spring leaf (8) with it is defeated
The foil gauge that conducting wire (4) is connected out interts interior into shell (1) and is set with one end of the auxiliary connecting rod (10) of spacing collar (11)
It is arranged on left spring piece (3) and right spring leaf (8), the left side coupled with right support abutment (18) is arranged in the other end of auxiliary connecting rod (10)
Connecting rod (12) is provided with left support abutment (21) on lower cover (19), it is characterised in that: left connecting rod (12) and right support abutment (18) it
Between be provided with hard and soft dual-purpose coupling mechanism, left connecting rod (12) and hard and soft dual-purpose coupling mechanism constitute hard and soft dual-purpose connecting rod (36).
2. assembling multipurpose strain gauge sensors according to claim 1, it is characterised in that: described hard and soft two
Include sleeve (13) with coupling mechanism, one end of sleeve (13) connection left connecting rod (12), the other end be provided with right connecting rod (17),
The other end of right connecting rod (17) is arranged on right support abutment (18), is provided with fixed glue-line between sleeve (13) and left connecting rod (12)
(14), elastic element is set between left connecting rod (12) and right connecting rod (17).
3. assembling multipurpose strain gauge sensors according to claim 2, it is characterised in that: described hard and soft dual-purpose
Active length 0.008m~1m of connecting rod (36).
4. assembling multipurpose strain gauge sensors according to claim 2, it is characterised in that: the left connecting rod
(12) and right connecting rod (17) selects indium steel wire rod to be made.
5. assembling multipurpose strain gauge sensors according to claim 2, it is characterised in that: left connecting rod (12) and
The length of right connecting rod (17), diameter are all the same.
6. assembling multipurpose strain gauge sensors according to claim 2, it is characterised in that: the left connecting rod
(12) 2.5~6mm of diameter；Right connecting rod (17) 2.5~6mm of diameter.
7. according to any assembling multipurpose strain gauge sensors of claim 2, it is characterised in that: right connecting rod
(17) it is equipped with scale value.
8. assembling multipurpose strain gauge sensors according to claim 2, it is characterised in that: the elastic element
For spring (15).
9. assembling multipurpose strain gauge sensors according to claim 8, it is characterised in that: the spring (15)
One end passes through left connecting rod (12) and is fixedly connected on left connecting rod (12) by epoxy glue, and the other end passes through right connecting rod (17) and passes through epoxy
Glue is fixedly connected on right connecting rod (17).
10. assembling multipurpose strain gauge sensors according to claim 8, it is characterised in that: the spring
(15) rigidity 1.22mm/N~0.42mm/N.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780707A (en) * | 2020-06-06 | 2020-10-16 | 河南交院工程技术有限公司 | Strain measuring device |
| CN111780708A (en) * | 2020-06-06 | 2020-10-16 | 河南交院工程技术有限公司 | Strain gauge |
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| CN205561797U (en) * | 2016-05-03 | 2016-09-07 | 三峡大学 | Device is checked to displacement meter demarcation - strainometer |
| CN209623605U (en) * | 2019-04-19 | 2019-11-12 | 西安桥邦智能科技有限公司 | Assembling multipurpose strain gauge sensors |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111780707A (en) * | 2020-06-06 | 2020-10-16 | 河南交院工程技术有限公司 | Strain measuring device |
| CN111780708A (en) * | 2020-06-06 | 2020-10-16 | 河南交院工程技术有限公司 | Strain gauge |
| CN111780707B (en) * | 2020-06-06 | 2021-12-14 | 河南交院工程技术集团有限公司 | Strain measuring device |
| CN111780708B (en) * | 2020-06-06 | 2021-12-14 | 河南交院工程技术集团有限公司 | Strain gauge |
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