CN2057278U

CN2057278U - Resistance strain sensor with supporter

Info

Publication number: CN2057278U
Application number: CN 89215088
Authority: CN
Inventors: 智广; 黄铮
Original assignee: COMMUNICATIONS SCIENTIFIC RESEARCH INST JIANGXI PROV
Current assignee: COMMUNICATIONS SCIENTIFIC RESEARCH INST JIANGXI PROV
Priority date: 1989-08-08
Filing date: 1989-08-08
Publication date: 1990-05-16

Abstract

The utility model provides a resistance strain sensor with supporter, comprising a bow-shaped three-dimensional elastic trip whose middle top is pasted with a strain foil and has an open pore or opening, two fastener supporting bases, two fasteners and two cushion rings. The fastener supporting bases are composed of two bases, two bottom mounting plates and two pillars connected into an integration. The utility model has no special requirement of the surface smoothness of the concrete and other solid test elements. Compared with the site pasting test mode, the cockamamie damp proofing and grinding process are omitted, and the strain test efficiency is increased. The push rods of the measuring instruments such as a dial gauge can be fixed on the supporting bases of the fasteners for the convenience of contrasting and testing the dial gauge and the electrical measurement in the same stress field.

Description

Resistance strain sensor with supporter

The utility model relates to uses the device that electric wire strain gauge is measured the solid material strain, relates in particular to a kind of resistance strain type sensor with bearing.

The conventional method of concrete surface strain testing is that barbola work is a ring very important in the resistance strain gage measurement technology at the direct adhering resistance strain sheets in test block surface, and the quality of paster is very big to the test result influence, especially in outdoor test.The strain testing of concrete or reinforced concrete structure all adopts the foil gauge of large-length, and the paster difficulty is bigger, and is moistureproof very loaded down with trivial details with the polishing measure, the paster difficult quality guarantee, and foil gauge can only disposablely use.Chinese patent CN86103169 discloses a kind of resistance-strain type of dynamometer sensor and method for designing that adopts additional elastic component, to the smooth and smooth higher requirement that still has on test block surface.

The purpose of this utility model is to provide a kind of resistance strain type sensor that the test block surface smoothness is not had the band bearing of specific (special) requirements.

The purpose of this utility model is achieved in that it is pasted with foil gauge 8 by center top 9 and the securing member bearing that fused by base 5, pad platform 6 and mast 7 by the arc stereo-elastic sheet 1 of perforate or opening 10, two 2, two securing members 3 and two packing rings 4 are formed.Adopt the arc stereo-elastic sheet 1 of definite shape and dimension scale can obtain good linearty and appropriate sensitivity, 9 central authorities are perforate 10 at the top, 9 middle both sides then are opening 10 at the top, and its purpose all is to obtain stress concentration effect in perforate or opening 10 near zones.As one of feature of the present utility model is that arc stereo-elastic sheet 1 two ends have opening or perforate 11, so that arc stereo-elastic sheet 1 is connected with two securing member bearings 2, and securing member bearing 2 is moved betwixt, and with adjusting bearing gauge length, thus the sensitivity of change sensor.Another feature of the present utility model is to be provided with two securing member bearings 2 that fused by base 5, pad platform 6 and mast 7, and with the securing member 3 and the packing ring 4 of its adapted, base 5 is supporting other member of securing member bearing 2 and is being connected with test block, its bottom has one or several sulculus mouths 12 along warp-wise, so that securing member bearing 2 can be separated test block when needed easily.The effect of pad platform 4 be make arc stereo-elastic sheet 1 two ends link to each other with securing member bearing 2 the last lower plane of part be in the perpendicular same malleation field of force, base 5 planes in, with the raising measuring accuracy.The function of mast 7 then is that securing member 3 and packing ring 4 are fixed thereon, and can move up and down as required or turn.Respectively there is a kerf 13 symmetry both sides, securing member 3 upper ends, when securing member 3 when mast 7 is screw mandrel 7 helical motions, can use the arc stereo-elastic sheet 1 of spanner degree of tightness, the effect of packing ring 4 is to significantly reduce the crooked influence of the friction of arc stereo-elastic sheet 1 horizontal direction, improves measuring accuracy.The utility model matches with compound anchor clamps and tapered end assembly, and with the surveying instrument push rod, for example the clock gauge push rod is fixed on the securing member bearing 2, resistance strain type sensor and clock gauge is in the same stress field compares test.

The utility model has securing member bearing 2, arc stereo-elastic sheet 1 does not directly contact with test block, thereby concrete and other solid test block surface smoothness there is not specific (special) requirements, can carry out strain measurement on more coarse surface, compare with the test mode of on-the-spot paster, loaded down with trivial details operations such as protection against the tide, polishing have been saved, improved the test work efficiency, and clock gauge class surveying instrument push rod can be fixed on the securing member bearing 2, so that in same stress field, carry out the contrast test of clock gauge and electrical measurement.

The utility model has the following drawings:

Fig. 1 is a front view of the present utility model;

Fig. 2 is the vertical view of arc stereo-elastic sheet.

The compound anchor clamps and the tapered end assembly that are used with the utility model do not draw in the accompanying drawings.

Embodiment

Arc stereo-elastic sheet 1 adopts the 65Mn steel plate of 0.8 millimeters thick to make broken-line type, contrast Fig. 2 is of a size of, length overall L:180 millimeter, the long l:40 millimeter in bottom, top 9 long a:10 millimeters, sagitta h:8 millimeter, beam overall B:20 millimeter, opening 11 wide b:5 millimeters, the long S:20 millimeter of opening, the long Lo:150 millimeter of gauge length, top drilling 10 aperture D:8 millimeters.

Securing member bearing 2 adopts 45 ^#Steel is done, and mast 7 is a screw mandrel, adapted revolving type securing member 3.

The precision of present embodiment test concrete surface strain reaches more than 95%, compares with on-the-spot paster test, improves 3 times of test work efficiency.

Claims

1, a kind of resistance strain type sensor with bearing, comprise that center top 9 is pasted with foil gauge 8 and perforate is arranged or the arc stereo-elastic sheet 1 of opening 10, it is characterized in that there are opening or perforate 11 in arc stereo-elastic sheet 1 two ends, and be provided with two by base 5, pad platform 6, the securing member bearing 2 that fuses with mast 7 and with the securing member 3 and the packing ring 4 of its adapted, at arc stereo-elastic sheet 1 both ends open or perforate 11 places arc stereo-elastic sheet 1 is connected with two securing member bearings 2 with packing ring 4 by securing member 3, and securing member bearing 2 can move at opening or 11 of perforates.

2, the resistance strain type sensor of band bearing as claimed in claim 1 is characterized in that base 5 bottoms of securing member bearing 2 have one or several sulculus mouths 12 along warp-wise.

3, the resistance strain type sensor of band bearing as claimed in claim 1 is characterized in that respectively there is an otch 13 symmetry both sides, securing member 3 upper ends.