Portable steel structural member strain tester

Abstract

The utility model belongs to the technical field of test equipment, and particularly relates to a portable steel structural member strain tester, which comprises a full-bridge resistance strain type sensor, two sides of the full-bridge resistance strain type sensor are provided with magnetic bases; wherein the two magnetic bases are suitable for fixing the full-bridge resistance strain type sensor on a to-be-tested rigid structural member; the display instrument is in communication connection with the full-bridge resistance strain type sensor and is used for displaying a test result in real time, the portable steel structural member strain tester is provided with the magnetic base, so that the portable steel structural member strain tester is simple and convenient to operate and convenient to use repeatedly, and the surface and a protective layer of a to-be-tested steel structural member do not need to be damaged; the calibration of the full-bridge resistance strain type sensor and the display instrument before testing is facilitated, and the accuracy and reliability of the test result are ensured through the combination of the full-bridge resistance strain type sensor and the display instrument.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, specifically relating to a portable strain tester for steel structural components. Background Technology

[0002] In current engineering practice, the common procedure for testing the surface stress and strain of steel structural components involves cleaning and polishing the target measurement location, then attaching a resistance strain gauge with adhesive and welding signal leads to a dedicated strain gauge. However, to simplify the wiring and control costs, only a 1 / 4 bridge uniaxial strain gauge or a half-bridge strain gauge is often used, which has serious shortcomings.

[0003] First, it is easily affected by the ambient temperature, which can cause data drift and affect the accuracy of the measurement.

[0004] Secondly, the signal cannot be calibrated during the entire testing process, and the measurement accuracy depends heavily on the quality of the strain gauge and the level of on-site operation.

[0005] Furthermore, once the strain gauge is attached, its measurement position cannot be adjusted, and it cannot be reused. It is only suitable for one-time testing, resulting in a waste of resources.

[0006] Therefore, in order to solve the above problems, it is necessary to design a portable strain tester for steel structures. Utility Model Content

[0007] The purpose of this invention is to provide a portable strain tester for steel structural components to solve the technical problem of inaccurate measurements.

[0008] To solve the above-mentioned technical problems, this utility model provides a portable strain tester for steel structures, comprising:

[0009] A full-bridge resistance strain gauge sensor has magnetic bases on both sides; among which...

[0010] The two magnetic bases are suitable for fixing a full-bridge resistance strain gauge sensor onto the rigid structural component to be tested;

[0011] The display instrument communicates with a full-bridge resistance strain gauge sensor to display test results in real time.

[0012] Furthermore, the display instrument is wired to a full-bridge resistance strain gauge sensor.

[0013] Furthermore, the full-bridge resistance strain gauge sensor is S-shaped; wherein

[0014] The full-bridge resistance strain gauge sensor has a square hole in the middle; and

[0015] The square hole is suitable for attaching four strain gauge bridges to the wired output signal to the display instrument.

[0016] Furthermore, connecting blocks are provided on both sides of the full-bridge resistance strain gauge sensor; wherein

[0017] The connecting block is fixed on the corresponding magnetic base.

[0018] Furthermore, the bottom of the magnetic base is provided with a V-shaped groove.

[0019] The beneficial effects of this utility model are:

[0020] (i) Simply clean the surface of the steel structure to be measured to remove oil and impurities. Place the two magnetic bases on the measuring surface according to the required measurement direction and turn on the switches of the two magnetic bases. Shake the magnetic bases by hand to confirm that they are firmly attached. When the steel structure is subjected to external force and strain occurs, the two magnetic bases will produce relative displacement. The full-bridge resistance strain gauge sensor in the middle will deform and convert the strain change into an electrical signal, which will be output to the display instrument. The display instrument will convert these signals into intuitive display of the test results. After the test is completed, turn off the switches of the magnetic bases and remove the magnetic bases. Through the above steps, the operation is simple and easy to reuse, without damaging the surface and protective layer of the steel structure to be measured. It is convenient to calibrate the full-bridge resistance strain gauge sensor and the display instrument before the test. The combination of the full-bridge resistance strain gauge sensor and the display instrument ensures the accuracy and reliability of the test results.

[0021] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a perspective view of a preferred embodiment of the present invention.

[0025] Figure 2This is a perspective view of a preferred embodiment of the magnetic base of this utility model.

[0026] In the picture:

[0027] Full-bridge resistance strain gauge sensor 1, square hole 101;

[0028] Magnetic base 2, V-groove 201;

[0029] Display instrument 3, connecting block 4. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example 1

[0031] like Figure 1 , Figure 2 As shown, this embodiment provides a portable strain tester for steel structures, including:

[0032] A full-bridge resistance strain gauge sensor 1 has magnetic bases 2 on both sides; the two magnetic bases 2 are suitable for fixing the full-bridge resistance strain gauge sensor 1 onto the rigid structural component under test; a display instrument 3 is communicatively connected to the full-bridge resistance strain gauge sensor 1 for real-time display of test results; by using the full-bridge resistance strain gauge sensor 1, higher temperature stability is achieved; the magnetic bases 2 are, but are not limited to, switch-type magnetic bases to control the magnetic force to be turned on or off; the magnetic bases 2 are, but are not limited to, model pdok-PD-312; the display instrument 3 is, but is not limited to, a mobile type; the display instrument 3 is, but is not limited to, model fibos-FA06; the design of the mobile display instrument and the switch-type magnetic base makes the entire testing process more flexible and convenient, allowing users to perform tests anytime, anywhere.

[0033] In this embodiment, the surface of the steel structure to be measured is simply cleaned to remove oil and impurities. Two magnetic bases 2 are placed on the measuring surface according to the desired measurement direction, and the switches of the two magnetic bases 2 are turned on. The magnetic bases 2 are shaken by hand to confirm their secure adhesion. When the steel structure is subjected to external force and strain occurs, the two magnetic bases 2 generate relative displacement. The full-bridge resistance strain gauge sensor 1 in the middle deforms and converts the strain change into an electrical signal, which is then output to the display instrument 3. The display instrument 3 converts these signals into a visually intuitive display of the test results. After the test is completed, the switches of the magnetic bases 2 are turned off, and the magnetic bases 2 are removed. Through the above steps, the operation is simple and reusable, without damaging the surface and protective layer of the steel structure to be measured. It facilitates the calibration of the full-bridge resistance strain gauge sensor 1 and the display instrument 3 before testing. Furthermore, the combination of the full-bridge resistance strain gauge sensor 1 and the display instrument 3 ensures the accuracy and reliability of the test results.

[0034] The display instrument 3 is wired to the full-bridge resistance strain gauge sensor 1; the wired connection between the display instrument 3 and the full-bridge resistance strain gauge sensor 1 ensures the stability of signal transmission and guarantees the accuracy of test results.

[0035] The full-bridge resistance strain gauge sensor 1 is S-shaped; a square hole 101 is provided in the middle of the full-bridge resistance strain gauge sensor 1; and the square hole 101 is suitable for attaching four strain gauges to form a bridge and then outputting a wired signal to the display instrument 3; the full-bridge resistance strain gauge sensor 1 adopts, but is not limited to, the model Fibos-FA303; the square hole 101 adopts, but is not limited to, a flexible parallel beam structure as the most preferred method to ensure that the overall length deformation and the output signal correspond linearly after deformation under stress.

[0036] The full-bridge resistance strain gauge sensor 1 has connecting blocks 4 on both sides; the connecting blocks 4 are fixed on the corresponding magnetic bases 2; by setting the connecting blocks 4, it is possible to ensure that the full-bridge resistance strain gauge sensor 1 can be stably fixed on the magnetic bases 2, and at the same time ensure that the connection between the full-bridge resistance strain gauge sensor 1 and the magnetic bases 2 will not affect the measurement accuracy of the full-bridge resistance strain gauge sensor 1.

[0037] The bottom of the magnetic base 2 is provided with a V-groove 201; by setting the V-groove 201, the magnetic base 2 can be easily fixed on the round shaft structure.

[0038] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0039] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0042] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0043] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0044] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A portable strain gauge for steel structural components, characterized in that, include: A full-bridge resistance strain gauge sensor (1) has magnetic bases (2) on both sides. in The two magnetic bases (2) are suitable for fixing the full-bridge resistance strain gauge sensor (1) on the rigid structural component to be measured; The display instrument (3) is connected in communication with the full-bridge resistance strain gauge sensor (1) to display test results in real time.

2. The portable steel structure strain tester as described in claim 1, characterized in that, The display instrument (3) is wiredly connected to the full-bridge resistance strain gauge sensor (1).

3. The portable steel structure strain tester as described in claim 2, characterized in that, The full-bridge resistance strain gauge sensor (1) is of type S; wherein The full-bridge resistance strain gauge sensor (1) has a square hole (101) in the middle; and The square hole (101) is suitable for attaching four strain gauge bridges to the wired output signal to the display instrument (3).

4. The portable steel structure strain tester as described in claim 1, characterized in that, The full-bridge resistance strain gauge sensor (1) has connecting blocks (4) on both sides; wherein The connecting block (4) is fixed on the corresponding magnetic base (2).

5. The portable steel structure strain tester as described in claim 4, characterized in that, The bottom of the magnetic base (2) is provided with a V-groove (201).

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