CN207946294U

CN207946294U - Cylindrical structure transversely deforming measuring device

Info

Publication number: CN207946294U
Application number: CN201820513343.1U
Authority: CN
Inventors: 杨荷; 韩萌萌; 杨波; 刘波; 张中才; 焦敏; 安晓伟
Original assignee: Institute of Electronic Engineering of CAEP
Current assignee: Institute of Electronic Engineering of CAEP
Priority date: 2018-04-11
Filing date: 2018-04-11
Publication date: 2018-10-09
Anticipated expiration: 2028-04-11

Abstract

The utility model discloses a kind of cylindrical structure transversely deforming measuring devices, lantern ring including being cylindrical in shape structure, the set is equipped with opening, lantern ring is respectively provided with a hold-down support in the both sides of opening, aperture measurement instrument is installed, the aperture measurement instrument is for measuring the distance between two hold-down supports changing value on the hold-down support.Using above scheme, can with effecting reaction structure circumferencial direction whole transverse deformation, rather than using the local deformation measured by foil gauge.When measurement, opening degree that the transversely deforming of structure is open by present apparatus lantern ring is reacted, and passes through the real-time survey calculation of measuring instrument, it quickly obtains measurement result, improves measurement efficiency and precision, while improving Measurement reliability, reduce measurement cost, optimal inspection economy.

Description

Cylindrical structure transversely deforming measuring device

Technical field

The utility model is related to distortion measurement technical fields, and in particular to a kind of cylindrical structure transversely deforming measuring device.

Background technology

In material static or dynamic compression experiments, sample is compressed axially, the transversely deforming generated is mainly led to Cross and be pasted onto the foil gauge of specimen surface and measure, however fragile material failure stage will generate larger transversely deforming and Failure by shear so that the foil gauge for being pasted on specimen surface also destroys therewith, can not effectively obtain the deflection after material damage, And foil gauge can only generally also measure the deformation values of sample part, it is difficult to which W-response sample circumference direction deformation quantity, measures As a result there is certain limitation.The method that foil gauge conventional simultaneously measures transversely deforming, when test, need every time to sample Be surface-treated, the work such as strain gauge adhesion and signal wire bonding, when testing a large amount of samples, working efficiency compared with It is low, and be easy to increase measurement cost.

Utility model content

To solve the above problems, the utility model provides a kind of cylindrical structure transversely deforming measuring device, can repeat It utilizes, reduces measurement cost, improve measurement efficiency.

To achieve the above object, technical solutions of the utility model are as follows：

A kind of cylindrical structure transversely deforming measuring device, key are：It is cylindrical in shape the lantern ring of structure, which is equipped with out Mouthful, lantern ring is respectively provided with a hold-down support in the both sides of opening, aperture measurement instrument, the aperture is equipped on the hold-down support Measuring instrument is for measuring the distance between two hold-down supports changing value.

Using the above structure, by the way that ring set will be covered on the cylindrical test samples, when sample is squeezed by axial direction, Transversely deforming occurs in circumferencial direction, becomes larger to be reacted to the distance between two hold-down supports of opening, passes through what is measured Aperture changing value can quickly calculate the transverse deformation mean value of sample according to formula, and measurement is accurate quick, and measuring device is not It is fragile, it can repeatedly use.

As preferred：The aperture measurement instrument is LVDT pen type displacement sensors, the LVDT pen types displacement sensing utensil Flexible contact jaw, fixing end and signal output line；

The wherein described Elastic Contact end is between two hold-down supports, and the fixing end is fixed on it by lock-screw In on a hold-down support, Elastic Contact is rectified to another hold-down support.Elasticity is passed through using LVDT pen type displacement sensors It compresses the form discharged again and measures aperture variation, be conducive to further increase measurement accuracy, and measure suitable for fine, and lead to The signal output line for crossing sensor is connected with external collecting device, can faster obtain measurement data, further increase survey Amount efficiency.

As preferred：Axially vertical, the locking screw of the setting direction of the lock-screw and LVDT pen type displacement sensors Nail is penetrated from side wall of the hold-down support far from lantern ring in hold-down support, and is abutted with the fixing end.Using the above locking mode, Lock-screw is unclamped when being easily installed, and is quickly adjusted the position of LVDT pen type displacement sensors, is met range demand.

As preferred：Further include limit spring, is equipped with pillar on two hold-down supports, the two of the limit spring End is removably attached on two pillars.It, can be by two fixations by suitable limit spring by the way of being uniformly arranged Bearing is inwardly tightened, it is ensured that at the initial stage of measurement, lantern ring can be tightly attached to sample surfaces, in this way could be more preferable when sample deforms upon It is that aperture measurement instrument detects, while being also convenient for the selection and adjusting of aperture measurement instrument range, improves accuracy of detection.

As preferred：The lantern ring is aluminum alloy material.Using above scheme, being conducive to extend the repetition of measuring device makes With the service life, while meeting the deformable demand of lantern ring.

Compared with prior art, the utility model has the beneficial effects that：

It, can be with effecting reaction structure in circumference side using cylindrical structure transversely deforming measuring device provided by the utility model To whole transverse deformation, rather than using the local deformation measured by foil gauge, while by whole deformation, passing through simple structure Design is reacted by the opening degree of lantern ring opening, and by the real-time survey calculation of measuring instrument, quickly obtains measurement knot Fruit improves measurement efficiency and precision, while improving Measurement reliability, reduces measurement cost, optimal inspection economy.

Description of the drawings

Fig. 1 is the usage state diagram of the utility model；

Fig. 2 is embodiment illustrated in fig. 1 scheme of installation.

Specific implementation mode

The utility model is described in further detail with attached drawing with reference to embodiments.

Cylindrical structure transversely deforming measuring device referring to fig. 1 and fig. 2, main includes the lantern ring 1 for being cylindrical in shape structure, Lantern ring 1 is equipped with opening 10, and opening 10 is opened up along the length direction of lantern ring 1 so that and the cross section of lantern ring 1 is in open loop structure, when In the case where being compressed axially effect shear ultimate strength occurs for sample, when lantern ring 1 is by radially outside active force, be open 10 width Become larger, in order to extend the service life of measuring device in the application, therefore lantern ring 1 is made of pure aluminum material.

Two hold-down supports 2 are arranged on lantern ring 1 at opening 10, two hold-down supports 2 are located at opening 10 Both sides, are in block structure, and the distance between two hold-down supports 2 and the size of opening 10 are consistent, pacify on hold-down support 2 Equipped with aperture measurement instrument 3, as shown, the aperture measurement instrument 3 of the application uses LVDT pen type displacement sensors, range 2- 8mm (displacement sensor that different ranges in actual application, can be chosen according to the characteristic of sample), linearity error ± 0.25%, it can quickly measure the changing value of distance between two hold-down supports 2.

LVDT pen type displacement sensors include elastic connecting contravention 30, fixing end 31 and signal output line 32, as shown, LVDT pen types displacement sensor is arranged along the width direction of opening 10, and fixing end 31 is fixed therein one by lock-screw 4 On hold-down support 2, corresponding position is equipped with horizontal through hole on hold-down support 2, after LVDT pen type displacement sensors are horizontal through through-hole, Fixing end 31 is partially in through-hole, and lock-screw 4 is penetrated in through-hole from the bottom of hold-down support 2 and locked to it.

Elastic connecting contravention 30 is located between two hold-down supports 2, and face another hold-down support 2 setting, signal output Line 32 is in the outside of lantern ring 1.

In the present embodiment, in order to enable lantern ring 1 preferably be close to sample to be tested in measurement process, therefore fixed at two It is additionally provided with limit spring 5 between seat 2, as shown, being equipped with pillar 20, pillar 20 on the homonymy side wall of two hold-down supports 2 Axial direction along lantern ring 1 extends outwardly, the hook that the both ends of limit spring 5 are equipped with and coordinate with pillar 20.

With reference to figure 1 and Fig. 2, in use, lantern ring 1 is set on columned sample to be tested 6, suitable limit is then chosen Position spring 5, it is ensured that lantern ring 1 is close to substantially with the surface of sample to be tested 6, then installs LVDT pen type displacement sensors again, suitably Its position is adjusted, elastic connecting contravention 30 is made to be in compressive state, and ensures that it is within the scope of measuring range, then by signal Output line 32 is connected with external collecting device, finally applies axial compressive force to sample to be tested 6, is sent out on 6 circumferencial direction of sample to be tested When raw lateral expansion, radially outer active force is applied to lantern ring 1,10 width of being open becomes larger, i.e. between two hold-down supports 2 Aperture become larger, and elastic connecting contravention 30 carries out elastic release, and external collecting device then can quickly calculate cross according to this numerical value To deformation mean value, main formulas for calculating is as follows：

Wherein ε ' is the transverse deformation mean value (needing measured value) that sample to be tested 6 occurs in a circumferential direction；

δ is the sensitivity coefficient of LVDT pen type displacement sensors；

△ l are aperture changing value at the opening 10 measured by LVDT pen type displacement sensors (i.e. between two hold-down supports 2 Distance change value)；

D is the diameter of sample to be tested 6.

Finally, it should be noted that foregoing description is only the preferred embodiment of the utility model, the ordinary skill of this field Personnel are under the enlightenment of the utility model, under the premise of without prejudice to the utility model aims and claim, can make more Kind is similar to be indicated, such transformation is each fallen within the scope of protection of the utility model.

Claims

1. a kind of cylindrical structure transversely deforming measuring device, it is characterised in that：Lantern ring (1) including being cylindrical in shape structure, the lantern ring (1) it is equipped with opening (10), lantern ring (1) is respectively provided with a hold-down support (2), the hold-down support (2) in the both sides of opening (10) On aperture measurement instrument (3) is installed, the aperture measurement instrument (3) is for measuring the variation of the distance between two hold-down supports (2) Value.

2. cylindrical structure transversely deforming measuring device according to claim 1, it is characterised in that：The aperture measurement instrument (3) be LVDT pen type displacement sensors, the LVDT pen types displacement sensor have elastic connecting contravention (30), fixing end (31) and Signal output line (32)；

The wherein described Elastic Contact end (30) is between two hold-down supports (2), and the fixing end (31) passes through lock-screw (4) it is fixed therein on a hold-down support (2), another hold-down support (2) of elastic connecting contravention (30) face.

3. cylindrical structure transversely deforming measuring device according to claim 2, it is characterised in that：The lock-screw (4) Setting direction and LVDT pen type displacement sensors it is axially vertical, lock-screw (4) is from hold-down support (2) far from lantern ring (1) Side wall penetrate in hold-down support (2), and abutted with the fixing end (31).

4. cylindrical structure transversely deforming measuring device according to claim 1 or 2, it is characterised in that：It further include limit bullet Spring (5) is equipped with pillar (20) on two hold-down supports (2), and the both ends of the limit spring (5) are removably attached to On two pillars (20).

5. cylindrical structure transversely deforming measuring device according to claim 1, it is characterised in that：The lantern ring (1) is aluminium Alloy material.