Strain gauge capable of improving measurement precision

Abstract

The utility model discloses a strain gauge capable of improving measurement precision in the field of stress measurement, which comprises a fixed seat I and a fixed seat II, one side wall of the fixed seat I is fixedly connected with a straight plate connecting piece, and the upper part of the fixed seat II is fixedly connected with a bent plate connecting piece. A strain gauge body facing vertically is arranged between the straight plate connecting piece and the bent plate connecting piece. The straight plate connecting piece and the bent plate connecting piece are provided with open slots at the periphery of the strain gauge body. According to the utility model, the strain gauge body is vertically arranged, so that the original axial stretching deformation can be converted into the radial inclined side pulling deformation of the strain gauge after the strain gauge body is installed on a piece to be measured, under the condition of the same acting force, the deformation quantity can be greatly increased, the effect of amplifying the deformation is achieved, and the measurement precision can be greatly improved; in addition, after the arrangement, the strain gauge body can be packaged by a plastic film more easily after extending out, so that the strain gauge is more convenient to transport and package and is very practical.

Description

TECHNICAL FIELD

[0001] The utility model relates to stress measurement field, concretely is a strain gauge that improves measurement accuracy. BACKGROUND

[0002] With bridge engineering in the importance of infrastructure increasingly apparent, prestressed concrete construction on the bridge gets universal application, the vertical prestressed reinforcement of bridge concrete construction is the main force of concrete bearing force pull rod, therefore needs to measure stress during construction, but the strain gauge of prior art is during measurement, it is mostly through the adhesion or screw fixed on the measured piece, mainly occurs tensile deformation, the deformation is small, and the measurement progress is low, and moreover, the replacement of strain gauge body is inconvenient. SUMMARY

[0003] The utility model discloses a kind of strain gauges that improve measurement accuracy, to solve the problems raised in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A kind of strain gauges that improve measurement accuracy, including fixed seat one and fixed seat two, the straight plate connecting piece is fixedly connected on the one side wall of fixed seat one, the bent plate connecting piece is fixedly connected above fixed seat two, vertically oriented strain gauge body is arranged between the straight plate connecting piece and the bent plate connecting piece.

[0006] The straight plate connecting piece and the bent plate connecting piece are all provided with opening groove in the periphery of the strain gauge body, fixed pressing plate is arranged in the opening groove, ball head is movably arranged on the fixed pressing plate, fixed screw is fixedly connected on one side of the ball head, the fixed screw is arranged through one side of the opening groove, and the fixed screw and the straight plate connecting piece and the bent plate connecting piece are all connected by screw thread.

[0007] As a further scheme of the utility model: the fixed screw selects internal hexagon countersunk head screw, spherical movable hole for providing the activity space for ball head is formed in the periphery of the ball head on the fixed pressing plate.

[0008] As a further scheme of the utility model: the fixed seat one and the fixed seat two are same in structure, and the fixed hole for being connected with external measured piece is formed in the upper four corners of both.

[0009] As a further scheme of the utility model: the strain gauge body is pressed in between one side of the opening groove and the fixed pressing plate by fixed screw.

[0010] Compared with the prior art, the utility model has the advantages of

[0011] 1, the utility model discloses a strain gauge body vertical setting can after installing on the measured piece, the original axial tensile deformation is converted into the radial oblique side tension deformation of strain gauge, can greatly increase deformation under the condition of the same force, play the role of deformation amplification, can greatly improve the precision of measurement, and after setting like this, the strain gauge body is more easily packed with plastic film after stretching, is more convenient for transportation packing, and is very practical.

[0012] 2, the utility model discloses can be fixed by tightening fixed screw, can realize the fixed compression of strain gauge body, and the pressure of pressure plate is exerted by the mode of ball hinge, and the compression is more uniform, and installation and replacement are more convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structural schematic diagram of the utility model;

[0014] Figure 2 It is the partial and section view of fixed seat two opening groove part in the utility model;

[0015] Figure 3 It is the utility model Figure 2 A partial enlarged view in the utility model.

[0016] In the drawing: 1, fixed seat one;2, fixed seat two;3, straight plate connecting piece;4, bent plate connecting piece;5, strain gauge body;6, opening groove;7, fixed screw;8, fixed compression plate;801, movable hole;9, ball head. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0018] Please refer to Figures 1 to 3 In the embodiments of the utility model, a strain gauge for improving measurement precision comprises fixed seat one 1 and fixed seat two 2, a straight plate connecting piece 3 is fixedly connected to one side wall of the fixed seat one 1, a bent plate connecting piece 4 is fixedly connected to the top of the fixed seat two 2, and a strain gauge body 5 vertically oriented is arranged between the straight plate connecting piece 3 and the bent plate connecting piece 4.

[0019] The straight plate connecting piece 3 and the bent plate connecting piece 4 are provided with an open slot 6 at the periphery of the strain gauge body 5, the open slot 6 is internally provided with a fixed pressing plate 8, the fixed pressing plate 8 is movably provided with a ball head 9, one side of the ball head 9 is fixedly connected with a fixed screw 7, the fixed screw 7 is arranged through one side of the open slot 6, and the fixed screw 7 is connected with the straight plate connecting piece 3 and the bent plate connecting piece 4 through threads.

[0020] By adopting the above technical scheme, the original axial tensile deformation is converted into the radial inclined side tensile deformation of the strain gauge body 5 after being vertically arranged and installed on the measured member, the deformation amount can be greatly increased under the same force, the deformation is amplified, the measurement accuracy is greatly improved, the strain gauge body 5 is more easily packaged with a plastic film after being extended, the transportation and packaging are more convenient, and the device is very practical.

[0021] The fixed screw 7 is selected from an internal hexagonal countersunk head screw, the fixed pressing plate 8 is provided with a spherical movable hole 801 at the periphery of the ball head 9, the strain gauge body 5 is pressed between one side of the open slot 6 and the fixed pressing plate 8 through the fixed screw 7.

[0022] By adopting the above technical scheme, the strain gauge body 5 can be fixed and pressed by tightening the fixed screw 7, the pressing plate is pressed more uniformly by adopting the spherical hinge mode, and the installation and replacement are more convenient and fast.

[0023] The fixed seat one 1 and the fixed seat two 2 are the same in structure, and the four corners of the upper portions of the two are provided with fixed holes for being connected with external measured members.

[0024] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A strain gauge for improving measurement accuracy, comprising a first fixing seat (1) and a second fixing seat (2), characterized in that: The straight plate connecting piece (3) and the bent plate connecting piece (4) are provided with opening grooves (6) at the periphery of the strain gauge body (5), the inside of the opening groove (6) is provided with a fixed pressing plate (8), the fixed pressing plate (8) is movably provided with a ball head (9), one side of the ball head (9) is fixedly connected with a fixed screw (7), the fixed screw (7) penetrates one side of the opening groove (6) and is arranged, and the fixed screw (7) and the straight plate connecting piece (3) and the bent plate connecting piece (4) are connected through threads. The fixed screw (7) is selected from an internal hexagonal countersunk head screw, and a spherical movable hole (801) for providing a movable space for the ball head (9) is formed in the periphery of the ball head (9) on the fixed pressing plate (8).

2. The strain gauge of claim 1, wherein: The fixed seat one (1) and the fixed seat two (2) are the same structure, and the four corners of the top of both are provided with fixed holes for connecting with external measured parts.

3. The strain gauge of claim 1, wherein: The strain gauge body (5) is pressed between one side of the opening groove (6) and the fixed pressing plate (8) through the fixed screw (7).

4. The strain gauge of claim 1, wherein: ​

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