CN104743135B - Strain gauge protection method - Google Patents
Strain gauge protection method Download PDFInfo
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- CN104743135B CN104743135B CN201510149321.2A CN201510149321A CN104743135B CN 104743135 B CN104743135 B CN 104743135B CN 201510149321 A CN201510149321 A CN 201510149321A CN 104743135 B CN104743135 B CN 104743135B
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- foil gauge
- protection box
- adhesive tape
- testpieces
- strain gauge
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a strain gauge protection method. During strain gauge protection, a strain gauge protection box is placed on an adhering strain gauge, and the position of the strain gauge protection box is fixed with adhesive tape; then, one side of the adhesive tape is torn open, the strain gauge protection box is painted with adhesives, and the strain gauge protection box is fixed on a test specimen; finally, the inner portion of the strain gauge protection box is painted with protective agents, so the strain gauge protection box adheres to the test specimen, the adhesive tape is removed, and the strain gauge is protected. According to the method, the strain gauge adhering to the test specimen is protected, and the problem that after adhesion of the strain gauge, measurement data of the strain gauge are invalid due to factors such as trampling, oil stain soaking, a short circuit and an open circuit is solved.
Description
Technical field
The present invention relates to aircraft slow test technical field, and in particular to a kind of foil gauge in aircraft slow test is prevented
Maintaining method.
Background technology
Foil gauge is the element for measuring strain being made up of sensitive grid etc., and it is pasted onto securely test when using
On the measuring point of part, because measuring point is strained after testpieces stress, sensitive grid also makes its resistance change therewith deforming, then
Its resistance variations size is measured by instrumentation, and is converted to the strain value of measuring point.
Foil gauge is after stickup is finished, it is necessary to carry out appropriate protection, prevents it from being encroached on by external environment and personage.
In prior art, the means of defence for generally adopting is to be applied to foil gauge outer surface from appropriate protective agent so as to the external world
It is environmentally isolated, plays a part of sealing, moistureproof and insulation, such as in the Chinese patent application of Application No. 201210331209.7,
Foil gauge means of defence under a kind of oil mixing with water substance environment is refer to, foil gauge protection is carried out using Double-protection mode, first
Layer is applied on foil gauge using silicone rubber, it is desirable to which protective agent covers all foil gauge, and the stickup of foil gauge is completely covered
Glue region is used, the preliminary protection of foil gauge is realized；After the curing be complete, it is applied on silicone rubber with silicone sealant, realizing should
Become the water-fast protection of oil resistant of piece, it is desirable to which second layer zone of protection is greater than the modes such as ground floor region, though strengthen to a certain extent
Protection, but common means of defence or similar intensifying method exist in the practical application of aircraft slow test below ask
Topic：
Protect for the foil gauge on surface, due to testing the factors such as installation, inevitably the foil gauge to having protected enters
Row is trampled, and causes foil gauge to damage；
The foil gauge protective agent for currently using haves the shortcomings that not oil resistant, in long-term use, due to unintentionally hydraulic pressure
Oil is unrestrained or soaks so that foil gauge protective agent becomes sticky, easily rotten, and to foil gauge is made failure, data exception are protected；
The smear scope and thickness of protective agent does not have specification, because the quality of foil gauge protective agent is dilute, with mobility, applies
There is randomness when smearing, affect the attractive in appearance of testpieces.
The content of the invention
For the technical problem with present on, the present invention proposes a kind of foil gauge means of defence, to being pasted onto on testpieces
Foil gauge protected, prevent after the completion of strain gauge adhesion due to trampling, greasy dirt immersion, short circuit, the factor such as open circuit, cause
Generation of foil gauge measurement data the problems such as fail, specifically include following steps：
The foil gauge protection box that the first step, selection can be completely covered foil gauge and foil gauge pad, the strain
Piece protection box is a square box without upper and lower covers for being used to fully encase the foil gauge and foil gauge pad, and
The bottom of one of side is provided with a wire hole, and the wire hole is a groove that outlet is carried out for foil gauge measure traverse line
Hole；
Second step, adhesive tape is affixed on foil gauge protection box top；
3rd step, the foil gauge protection box for posting adhesive tape is tipped upside down on positioned on foil gauge, make to post adhesive tape should
Become piece protection box the foil gauge and foil gauge pad is completely covered and the foil gauge measure traverse line is made just from institute
State wire hole to pass, foil gauge protection box is fixed on into the testpieces with the unnecessary adhesive tape in foil gauge protection box top
On；
4th step, the pull-up from testpieces by the side of adhesive tape, opposite side is still glued on the testpieces, makes to be pasted onto
After foil gauge protection box ablation experiment part on the adhesive tape, in the bottom surrounding of the foil gauge protection box alite paste is smeared；
5th step, adhesive tape is attached on testpieces again, drives the foil gauge protection box by the foil gauge and should
Become piece pad to surround, and the foil gauge protection box is fixed on the testpieces；
6th step, removal adhesive tape, protective agent is applied in the foil gauge protection box.
Preferably, the foil gauge protection box is a rectangle Plastic Transparency Box.
In any of the above-described scheme preferably, the alite paste sticking strength is more than the adhesive tape, such as 502 glue, 101
Glue.
In any of the above-described scheme preferably, when the testpieces horizontal positioned, in the 6th step, including by
After the adhesive tape is removed completely, protective agent is applied in the foil gauge protection box.
In any of the above-described scheme preferably, when the testpieces is disposed vertically, in the 6th step, including elder generation
The side that the adhesive tape is located at testpieces top is torn, protective agent is applied in the foil gauge protection box, using being located at
The protective agent that the adhesive tape cleaning of testpieces bottom is overflowed, tears again afterwards remaining adhesive tape off.
The key point of the present invention is that foil gauge protection box is fixed by adhesive tape, is smearing the process of alite paste
In, for foil gauge, the position of foil gauge protection box will not change；Set by the structure of foil gauge protection box
Meter, on the one hand cause foil gauge protection box will not gland foil gauge measure traverse line, on the other hand again protective agent can be made not leak outside.
It is an advantage of the current invention that the means of defence has the characteristics of fitting tight with aircraft different curvature surface, and it is right
Solder joint is fixed, material selection plastic material, barrier propterty will not be affected because of trampling or oil immersion after injecting glue, while rule
Model foil gauge protective agent smears scope, improves testing ground tidiness.
Description of the drawings
Fig. 1 is the foil gauge protection box structural representation of a preferred embodiment of foil gauge means of defence of the present invention.
Fig. 2 is according to the foil gauge protection box and foil gauge position relationship schematic diagram of embodiment illustrated in fig. 1 of the present invention.
Fig. 3 is according to the foil gauge protection box installation positioning schematic diagram of embodiment illustrated in fig. 1 of the present invention.
Fig. 4 is to install injecting glue schematic diagram according to the foil gauge protection box of embodiment illustrated in fig. 1 of the present invention.
Wherein 1 is testpieces, and 2 is adhesive tape, and 3 is foil gauge protection box, and 4 is foil gauge, and 5 is foil gauge measure traverse line, and 6 are
Wire hole, 7 is foil gauge pad.
Specific embodiment
Foil gauge means of defence involved in the present invention is described in further details below in conjunction with the accompanying drawings.
Embodiment 1：
The present invention proposes a kind of foil gauge means of defence, and the foil gauge to being pasted onto on testpieces is protected, including with
Lower step：
The foil gauge protection box that the first step, selection can be completely covered foil gauge and foil gauge pad, such as Fig. 1 institutes
Show, the foil gauge protection box 3 is one square without upper and lower for fully encase the foil gauge and foil gauge pad
The box of lid, and wherein the bottom of a side is provided with a wire hole 6, the wire hole is one for foil gauge measure traverse line
Carry out the recess hole of outlet；
Second step, adhesive tape is affixed on foil gauge protection box top；
3rd step, the foil gauge protection box for posting adhesive tape is tipped upside down on positioned on foil gauge, make to post adhesive tape should
Become piece protection box the foil gauge and foil gauge pad is completely covered and the foil gauge measure traverse line is made just from institute
State wire hole to pass, by taking Fig. 2 as an example, in figure, 4 is foil gauge, and 7 is foil gauge pad, and foil gauge protection box 3 completely will strain
Piece 4 and foil gauge pad 7 are encased, and foil gauge measure traverse line 5 stretches out from the side plate bottom of foil gauge protection box 3, afterwards, use institute
State the unnecessary adhesive tape in foil gauge protection box top foil gauge protection box is fixed on the testpieces；
4th step, the pull-up from testpieces by the side of adhesive tape, opposite side is still glued on the testpieces, makes to be pasted onto
After foil gauge protection box ablation experiment part on the adhesive tape, as shown in figure 3, smearing protective agent is referred to as injecting glue, now, foil gauge
Protection box 3 is located on adhesive tape 2, and in the bottom surrounding of the foil gauge protection box alite paste is smeared；
5th step, adhesive tape is attached on testpieces again, drives the foil gauge protection box by the foil gauge and should
Become piece pad to surround, and the foil gauge protection box is fixed on the testpieces, as shown in figure 4, now, foil gauge
Protection box 3 has been secured on testpieces 1, will not make the change in location of foil gauge protection box 3 because of the reason for removing adhesive tape 2；
6th step, removal adhesive tape, protective agent is applied in the foil gauge protection box.
In the present embodiment, the foil gauge protection box is a rectangle Plastic Transparency Box.
The alite paste sticking strength is more than the adhesive tape, such as 502 glue, 101 glue.
In the present embodiment, when the testpieces is disposed vertically, in the 6th step, including first by the adhesive tape position
Tear in the side on testpieces top, as shown in figure 4, some adhesive tape is located on testpieces, this is due to by protective agent
It is applied in the foil gauge protection box and might have spilling, the protection overflowed using the adhesive tape cleaning positioned at testpieces bottom
Agent, tears again afterwards remaining adhesive tape off.
Embodiment 2：
It is similar to Example 1, when foil gauge is protected, foil gauge protection box is put on the foil gauge for pasting, use glue
Bring line position into and put fixation, afterwards tear adhesive tape on one side, alite paste is carried out to foil gauge protection box and is smeared, make foil gauge protection box
It is fixed on testpieces, finally protective agent is applied in foil gauge protection box so as to test specimen bonding, adhesive tape is removed, with this
Reach the effect of foil gauge protection.Except that, in the 6th step, when the testpieces horizontal positioned, can be by adhesive tape
Remove completely, repaste and smear protective agent.
Using paintbrush by protective agent uniform application in protection box, wait protective agent solidification, finally need to be checked and
Fifth wheel is removed, checks whether foil gauge and solder joint are completely covered by protective agent, whether protective agent is smeared uniformly in protection box, prevented
Whether the foil gauge after shield has damage, and the removing fifth wheel is referred to removes the protective agent residue for overflowing.
The means of defence has the characteristics of fitting tight with aircraft different curvature surface, and butt welding point is fixed；Material
Matter selects plastic material, and barrier propterty will not be affected because of trampling or oil immersion after injecting glue；Simultaneously specification foil gauge protective agent
Scope is smeared, testing ground tidiness is improved.The means of defence has that barrier propterty is excellent, with low cost, is convenient for carrying, grasps
The features such as making simple.In the full machine slow test of aircraft, the method is applied, and achieves positive effect.Full machine more than 200 has
In problem foil gauge, on inspection without because protection fails what is caused.It was verified that the means of defence being capable of effectively specification strain
Piece protective agent smears scope, and the foil gauge to pasting play it is anti-well trample, seal, the protection such as moistureproof, insulation is made
With improve the survival rate of foil gauge, it is ensured that the effectiveness and accuracy of measurement data.
It should be noted that foil gauge means of defence of the present invention includes any one in above-described embodiment and its any group
Close, but embodiment described above is only that the preferred embodiment of the present invention is described, and not the scope of the invention is entered
Row is limited, and under the premise of without departing from design spirit of the present invention, this area ordinary skill technical staff is to technical scheme
The various modifications made and improvement, all should fall in the protection domain of claims of the present invention determination.
Claims (5)
1. a kind of foil gauge means of defence, the foil gauge to being pasted onto on testpieces is protected, it is characterised in that including following
Step：
The foil gauge protection box that the first step, selection can be completely covered foil gauge and foil gauge pad, the foil gauge is prevented
Shield box is a square box without upper and lower covers for being used to fully encase the foil gauge and foil gauge pad, and wherein
The bottom of one side is provided with a wire hole, and the wire hole is a recess hole that outlet is carried out for foil gauge measure traverse line；
Second step, adhesive tape is affixed on foil gauge protection box top；
3rd step, the foil gauge protection box for posting adhesive tape is tipped upside down on positioned on foil gauge, make the foil gauge for posting adhesive tape
Protection box by the foil gauge and foil gauge pad be completely covered and make the foil gauge measure traverse line just from it is described go out
String holes is passed, and foil gauge protection box is fixed on the testpieces with the unnecessary adhesive tape in foil gauge protection box top；
4th step, the pull-up from testpieces by the side of adhesive tape, opposite side is still glued on the testpieces, makes to be pasted onto described
After foil gauge protection box ablation experiment part on adhesive tape, in the bottom surrounding of the foil gauge protection box alite paste is smeared；
5th step, adhesive tape is attached on testpieces again, drives the foil gauge protection box by the foil gauge and foil gauge
Pad is surrounded, and the foil gauge protection box is fixed on the testpieces；
6th step, removal adhesive tape, protective agent is applied in the foil gauge protection box.
2. foil gauge means of defence according to claim 1, it is characterised in that：The foil gauge protection box is a rectangle
Plastic Transparency Box.
3. foil gauge means of defence according to claim 1, it is characterised in that：The alite paste sticking strength is more than described
Adhesive tape.
4. foil gauge means of defence according to claim 1, it is characterised in that：When the testpieces horizontal positioned,
In 6th step, after the adhesive tape is removed completely, protective agent is applied in the foil gauge protection box.
5. foil gauge means of defence according to claim 1, it is characterised in that：When the testpieces is disposed vertically,
In 6th step, including first by the adhesive tape be located at testpieces top side tear, protective agent is applied in into the strain
In piece protection box, the protective agent overflowed using the adhesive tape cleaning positioned at testpieces bottom tears again afterwards remaining adhesive tape off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510149321.2A CN104743135B (en) | 2015-03-31 | 2015-03-31 | Strain gauge protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510149321.2A CN104743135B (en) | 2015-03-31 | 2015-03-31 | Strain gauge protection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104743135A CN104743135A (en) | 2015-07-01 |
| CN104743135B true CN104743135B (en) | 2017-05-17 |
Family
ID=53583550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510149321.2A Active CN104743135B (en) | 2015-03-31 | 2015-03-31 | Strain gauge protection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104743135B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873616A (en) * | 2018-08-31 | 2020-03-10 | 梅特勒-托利多(常州)精密仪器有限公司 | Moisture-proof strain gauge and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3428933A (en) * | 1966-08-29 | 1969-02-18 | Automation Ind Inc | Strain gage unit and method of applying the gage |
| US3863192A (en) * | 1973-01-24 | 1975-01-28 | Irving R Grey | Waterproof mechanically protected sensor package and method of installation |
| CN1203289C (en) * | 2003-06-04 | 2005-05-25 | 中国科学院力学研究所 | Foil gange deep sea insulation method and device |
| CN200941088Y (en) * | 2006-04-27 | 2007-08-29 | 山静民 | Strain-gage protector of lift hammer testing machine |
| CN103226012B (en) * | 2013-04-07 | 2015-07-15 | 北京机械设备研究所 | Protection and sealing method for strain measurement of underwater composite |
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2015
- 2015-03-31 CN CN201510149321.2A patent/CN104743135B/en active Active
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| Publication number | Publication date |
|---|---|
| CN104743135A (en) | 2015-07-01 |
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Effective date of registration: 20190819 Address after: 201203 Shanghai City, Pudong New Area China (Shanghai) free trade zone fanchun Road No. 400 Building 1 layer 3 Patentee after: Shanghai Qin Yao Aviation Test Technology Co., Ltd. Address before: 710065 box 86, Xi'an, Shaanxi Patentee before: China Plane Intensity Research Institute |