CN104743135A - Strain gauge protection method - Google Patents
Strain gauge protection method Download PDFInfo
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- CN104743135A CN104743135A CN201510149321.2A CN201510149321A CN104743135A CN 104743135 A CN104743135 A CN 104743135A CN 201510149321 A CN201510149321 A CN 201510149321A CN 104743135 A CN104743135 A CN 104743135A
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- strain
- gauge
- protection box
- adhesive tape
- test article
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- 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 static test technical field, be specifically related to a kind of strain-gauge means of defence in aircraft static test.
Background technology
Strain-gauge is the element for monitor strain be made up of sensitive grid etc., during use, it is pasted onto on the measuring point of test article securely, because measuring point strains after test article is stressed, sensitive grid also makes its resistance change thereupon being out of shape, record its resistance variations size by instrumentation again, and be converted to the strain value of measuring point.
Strain-gauge, after stickup, must be carried out suitable protection, prevent it to be subject to the infringement of external environment and personage.In prior art, the means of defence generally adopted selects suitable protectant to spread upon strain-gauge outside face, itself and external environment are isolated, the effect played sealing, protection against the tide and insulate, if application number is in the Chinese patent application of 201210331209.7, refer to strain-gauge means of defence under a kind of oil mixing with water substance environment, Double-protection mode is adopted to carry out strain-gauge protection, ground floor adopts silaatic to be applied in strain-gauge, require that protectant covers strain-gauge completely, and cover the stickup glue region of strain-gauge completely, realize the preliminary protection of strain-gauge; After solidifying completely, be applied on silaatic with silicone sealant, realize the water-fast protection of oil resistant of strain-gauge, require that second layer zone of protection is greater than the modes such as ground floor region, though enhance protection to a certain extent, but there is following problem in common means of defence or similar intensifying method in the practical application of aircraft static test:
Strain-gauge for surface is protected, and due to factors such as test installations, inevitably tramples the strain-gauge of having protected, causes strain-gauge to damage;
There is the shortcoming of not oil resistant in the strain-gauge protectant of present use, in long-term use, because hydraulic oil is unintentionally unrestrained or soak, makes strain-gauge protectant become thickness, easily rotten, protect and lost efficacy, data exception to making strain-gauge;
Protectant smear scope and thickness does not have specification, because the quality of strain-gauge protectant is rare, there is flowing power, exist random when smearing, affect the attractive in appearance of test article.
Summary of the invention
For the above technical matters existed; the present invention proposes a kind of strain-gauge means of defence; the strain-gauge be pasted onto on test article is protected; to prevent after strain gauge adhesion completes owing to trampling, greasy dirt immersion, short circuit, the factor such as open circuit; the generation of the problems such as the strain-gauge take off data inefficacy caused, specifically comprises the following steps:
The first step, choose the strain-gauge protection box that strain-gauge and strain-gauge weld nugget can be covered completely, described strain-gauge protection box is a square box without upper and lower covers for described strain-gauge and strain-gauge weld nugget being surrounded completely, and the bottom of a side has a wire hole wherein, described wire hole is one carry out the recess hole of outlet for strain-gauge measure traverse line;
Second step, adhesive tape is affixed on described strain-gauge protection box top;
3rd step, the strain-gauge protection box posting adhesive tape tipped upside down in strain-gauge position, make the strain-gauge protection box posting adhesive tape described strain-gauge and strain-gauge weld nugget be covered completely and described strain-gauge measure traverse line is passed from described wire hole just, strain-gauge protection box is fixed on described test article by the adhesive tape unnecessary with described strain-gauge protection box top;
4th step, by the side of adhesive tape from pull-up test article, opposite side is still pasted onto on described test article, after making to be pasted onto the strain-gauge protection box ablation experiment part on described adhesive tape, smears alite paste in the bottom surrounding of described strain-gauge protection box;
5th step, again by tape sticker on test article, drive described strain-gauge protection box described strain-gauge and strain-gauge weld nugget to be surrounded, and make described strain-gauge protection box be fixed on described test article;
6th step, removal adhesive tape, be applied in protectant in described strain-gauge protection box.
Preferably, described strain-gauge protection box is an oblong Plastic Transparency Box.
In above-mentioned either a program preferably, described alite paste sticking strength is greater than described adhesive tape, as 502 glue, 101 glue.
In above-mentioned either a program preferably, when described test article horizontal positioned, in described 6th step, comprise after described adhesive tape is removed completely, protectant is applied in described strain-gauge protection box.
In above-mentioned either a program preferably, when described test article is vertically placed, in described 6th step, comprise the side first described adhesive tape being positioned at test article top to tear, protectant is applied in described strain-gauge protection box, the protectant utilizing the adhesive tape cleaning being positioned at test article bottom to overflow, tears residue adhesive tape off afterwards again.
Key point of the present invention is, is fixed strain-gauge protection box by adhesive tape, and in the process of smearing alite paste, relative to strain-gauge, the position of strain-gauge protection box can not change; By the structure design of strain-gauge protection box, make on the one hand strain-gauge protection box can not gland strain-gauge measure traverse line, protectant can be made again not leak outside on the other hand.
The invention has the advantages that, this means of defence has feature closely of fitting with aircraft different curvature surface, and butt welding point is fixed, material selection plastic material, can not because of trampling or oil immersion after injecting glue, affect barrier propterty, simultaneously specification strain-gauge protectant smear scope, improve testing ground tidiness.
Accompanying drawing explanation
Fig. 1 is the strain-gauge protection box structural representation of a preferred embodiment of strain-gauge means of defence of the present invention.
Fig. 2 is according to the present invention's strain-gauge protection box embodiment illustrated in fig. 1 and strain-gauge position relationship schematic diagram.
Fig. 3 installs location schematic diagram according to the strain-gauge protection box that the present invention is embodiment illustrated in fig. 1.
Fig. 4 installs injecting glue schematic diagram according to the strain-gauge protection box that the present invention is embodiment illustrated in fig. 1.
Wherein 1 is test article, and 2 is adhesive tape, and 3 is strain-gauge protection box, and 4 is strain-gauge, and 5 is strain-gauge measure traverse line, and 6 is wire hole, and 7 is strain-gauge weld nugget.
Detailed description of the invention
Below in conjunction with accompanying drawing, strain-gauge means of defence involved in the present invention is described in further details.
Embodiment 1:
The present invention proposes a kind of strain-gauge means of defence, protects, comprise the following steps the strain-gauge be pasted onto on test article:
The first step, choose the strain-gauge protection box that strain-gauge and strain-gauge weld nugget can be covered completely, as shown in Figure 1, described strain-gauge protection box 3 is a square box without upper and lower covers for described strain-gauge and strain-gauge weld nugget being surrounded completely, and the bottom of a side has a wire hole 6 wherein, described wire hole is one carry out the recess hole of outlet for strain-gauge measure traverse line;
Second step, adhesive tape is affixed on described strain-gauge protection box top;
3rd step, the strain-gauge protection box posting adhesive tape is tipped upside down in strain-gauge and positions, the strain-gauge protection box posting adhesive tape is made described strain-gauge and strain-gauge weld nugget to be covered completely and described strain-gauge measure traverse line is passed from described wire hole just, for Fig. 2, in figure, 4 is strain-gauge, 7 is strain-gauge weld nugget, strain-gauge 4 and strain-gauge weld nugget 7 encase by strain-gauge protection box 3 completely, strain-gauge measure traverse line 5 stretches out from the side plate bottom of strain-gauge protection box 3, afterwards, strain-gauge protection box is fixed on described test article by the adhesive tape unnecessary with described strain-gauge protection box top,
4th step, by the side of adhesive tape from pull-up test article, opposite side is still pasted onto on described test article, after making to be pasted onto the strain-gauge protection box ablation experiment part on described adhesive tape, as shown in Figure 3, smear protectant and be called injecting glue, now, strain-gauge protection box 3 is positioned on adhesive tape 2, smears alite paste in the bottom surrounding of described strain-gauge protection box;
5th step, again by tape sticker on test article, described strain-gauge protection box is driven described strain-gauge and strain-gauge weld nugget to be surrounded, and make described strain-gauge protection box be fixed on described test article, as shown in Figure 4, now, strain-gauge protection box 3 has been secured on test article 1, can not make strain-gauge protection box 3 change in location because of the reason removing adhesive tape 2;
6th step, removal adhesive tape, be applied in protectant in described strain-gauge protection box.
In the present embodiment, described strain-gauge protection box is an oblong Plastic Transparency Box.
Described alite paste sticking strength is greater than described adhesive tape, as 502 glue, 101 glue.
In the present embodiment, when described test article is vertically placed, in described 6th step, comprise the side first described adhesive tape being positioned at test article top to tear, as shown in Figure 4, some adhesive tape is positioned on test article, and this may have spilling owing to being applied in by protectant in described strain-gauge protection box, the protectant utilizing the adhesive tape cleaning being positioned at test article bottom to overflow, tears residue adhesive tape off afterwards again.
Embodiment 2:
Similar to embodiment 1, when strain-gauge is protected, strain-gauge protection box is put in the strain-gauge pasted, carries out position with adhesive tape and fix, afterwards adhesive tape is torn, carry out alite paste to strain-gauge protection box to smear, make strain-gauge protection box be fixed on test article, finally protectant is smeared in strain-gauge protection box, itself and test specimen are bonded, removing adhesive tape, reaches the effect of strain-gauge protection with this.Difference is, in the 6th step, when described test article horizontal positioned, adhesive tape can be removed completely, then smear protectant.
Use paintbrush by protectant uniform application in protection box, wait protectant solidifies, finally need to carry out checking and removing superfluity, check whether strain-gauge and solder joint are covered completely by protectant, in protection box, whether protectant is smeared evenly, whether the strain-gauge after protection has damage, and described removing superfluity refers to the protectant residue removed and overflow.
This means of defence has feature closely of fitting with aircraft different curvature surface, and butt welding point is fixed; Material selection plastic material, because of trampling or oil immersion, can not affect barrier propterty after injecting glue; Simultaneously specification strain-gauge protectant smear scope, improve testing ground tidiness.This means of defence have barrier propterty excellence, with low cost, be convenient for carrying, the feature such as simple to operate.In the full machine static test of aircraft, the method is applied, and achieves positive effect.Full machine more than 200 has in problem strain-gauge, does not cause because of protection inefficacy on inspection.Facts have proved; this means of defence can effectively specification strain-gauge protectant smear scope; and the strain-gauge pasted is played well anti-ly to trample, seal, protection against the tide, the protective effect such as insulation, improve the survivor's rate of strain-gauge, ensure that validity and the accuracy of take off data.
It should be noted that; strain-gauge means of defence of the present invention comprises any one and combination in any thereof in above-described embodiment; but embodiment recited above is only be described the preferred embodiment of the present invention; not the scope of the invention is limited; do not departing under the present invention designs spiritual prerequisite; the various distortion that the common engineering staff in this area make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (5)
1. a strain-gauge means of defence, protects the strain-gauge be pasted onto on test article, it is characterized in that comprising the following steps:
The first step, choose the strain-gauge protection box that strain-gauge and strain-gauge weld nugget can be covered completely, described strain-gauge protection box is a square box without upper and lower covers for described strain-gauge and strain-gauge weld nugget being surrounded completely, and the bottom of a side has a wire hole wherein, described wire hole is one carry out the recess hole of outlet for strain-gauge measure traverse line;
Second step, adhesive tape is affixed on described strain-gauge protection box top;
3rd step, the strain-gauge protection box posting adhesive tape tipped upside down in strain-gauge position, make the strain-gauge protection box posting adhesive tape described strain-gauge and strain-gauge weld nugget be covered completely and described strain-gauge measure traverse line is passed from described wire hole just, strain-gauge protection box is fixed on described test article by the adhesive tape unnecessary with described strain-gauge protection box top;
4th step, by the side of adhesive tape from pull-up test article, opposite side is still pasted onto on described test article, after making to be pasted onto the strain-gauge protection box ablation experiment part on described adhesive tape, smears alite paste in the bottom surrounding of described strain-gauge protection box;
5th step, again by tape sticker on test article, drive described strain-gauge protection box described strain-gauge and strain-gauge weld nugget to be surrounded, and make described strain-gauge protection box be fixed on described test article;
6th step, removal adhesive tape, be applied in protectant in described strain-gauge protection box.
2. strain-gauge means of defence according to claim 1, is characterized in that: described strain-gauge protection box is an oblong Plastic Transparency Box.
3. strain-gauge means of defence according to claim 1, is characterized in that: described alite paste sticking strength is greater than described adhesive tape, comprises 502 glue, 101 glue.
4. strain-gauge means of defence according to claim 1, is characterized in that: when described test article horizontal positioned, in described 6th step, comprises after being removed completely by described adhesive tape, is applied in by protectant in described strain-gauge protection box.
5. strain-gauge means of defence according to claim 1, it is characterized in that: when described test article is vertically placed, in described 6th step, comprise the side first described adhesive tape being positioned at test article top to tear, protectant is applied in described strain-gauge protection box, the protectant utilizing the adhesive tape cleaning being positioned at test article bottom to overflow, tears residue adhesive tape off afterwards again.
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 |
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| Publication Number | Publication Date |
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| CN104743135A true CN104743135A (en) | 2015-07-01 |
| CN104743135B CN104743135B (en) | 2017-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510149321.2A Active CN104743135B (en) | 2015-03-31 | 2015-03-31 | Strain gauge protection method |
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Cited By (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 |
Citations (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 |
| CN1458498A (en) * | 2003-06-04 | 2003-11-26 | 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 |
| CN103226012A (en) * | 2013-04-07 | 2013-07-31 | 北京机械设备研究所 | Protection and sealing method for strain measurement of underwater composite |
-
2015
- 2015-03-31 CN CN201510149321.2A patent/CN104743135B/en active Active
Patent Citations (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 |
| CN1458498A (en) * | 2003-06-04 | 2003-11-26 | 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 |
| CN103226012A (en) * | 2013-04-07 | 2013-07-31 | 北京机械设备研究所 | Protection and sealing method for strain measurement of underwater composite |
Cited By (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 |
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| Publication number | Publication date |
|---|---|
| CN104743135B (en) | 2017-05-17 |
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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 |