CN216081305U

CN216081305U - Strain gauge

Info

Publication number: CN216081305U
Application number: CN202121453323.8U
Authority: CN
Inventors: 于彪; 刘容; 张黎
Original assignee: Kunming Changwei Yinhe Technology Co ltd
Current assignee: Kunming Changwei Yinhe Technology Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-03-18
Anticipated expiration: 2031-06-29

Abstract

The utility model provides a strain gauge which comprises a shell, wherein a force measuring assembly is arranged at the center inside the shell and comprises a strain gauge, the strain gauge is fixed on the inner bottom wall of the shell, an inductor is connected at the center of the bottom end of the strain gauge, the bottom end of the inductor extends to the outer side of the shell, a single chip microcomputer is installed on the inner top wall of the shell, a fixing assembly is arranged at the bottom end of the shell and comprises two fixing plates, the two fixing plates are symmetrically installed on two sides of the bottom end of the shell, clamping plates are symmetrically arranged on the adjacent sides of the two fixing plates, a lead screw is connected to the adjacent side of each clamping plate through a rotating shaft, and one end of the lead screw penetrates through the fixing plates and is connected with a rotating disc. The strain gauge is convenient to mount and dismount by arranging the fixing component, and secondary use is not influenced after the strain gauge is dismounted.

Description

Strain gauge

Technical Field

The utility model mainly relates to the technical field of geotechnical engineering, in particular to a strain gauge.

Background

Geotechnical engineering is a new technical system established in civil engineering practice in the 60 s of the 20 th century in European and American countries, and is a research object of geotechnical engineering, which solves problems of rock and soil engineering, including foundation and foundation, slope, underground engineering and the like. When carrying out geotechnical engineering, need adopt multiple excavating equipment to excavate the ground, the power of excavating equipment needs to be adjusted according to the hardness of ground in the excavation process, the vibration power that the power produced is then big more, will lead to excavating equipment internals not hard up after this vibration power reaches certain numerical value, influences excavating equipment's life to need a strainometer to detect this vibration power.

Strain gauges (sometimes referred to as strain gages) are sensors whose resistance varies with applied force; it converts physical quantities such as force, pressure, tension, weight, etc. into changes in resistance, thereby measuring the physical quantities. When an external force is applied to the fixed object, stress and strain are generated. The reaction force (to the external force) generated inside the object is the stress, and the displacement and deformation generated is the strain.

According to a patent document (publication No. CN203657737U), there is provided a bonded strain gauge comprising: the foil gage, with the foil gage passes through the result display device of pin connection, still includes paste agent and barrier paper, wherein, paste the agent and adhere to the face of pasting of foil gage, the foil gage that has adhered to paste the agent is arranged in on the barrier paper, the barrier paper with the foil gage with the one side of pasting the agent contact scribbles antiseized material.

However, most of the existing strain gauges are connected with other equipment by adopting adhesive, and the strain gauges are easily damaged during disassembly to influence secondary use of the strain gauges.

SUMMERY OF THE UTILITY MODEL

The present invention provides a strain gauge, which is used to solve the technical problems in the background art.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the utility model provides a strainometer, includes the casing, the inside central point of casing puts and is equipped with the dynamometry subassembly, the dynamometry subassembly includes the foil gage, the foil gage is fixed in on the interior diapire of casing, the bottom central point of foil gage puts and is connected with the inductor, the bottom of inductor extends to the outside of casing, install the singlechip on the interior roof of casing, the singlechip is electric connection with the foil gage, the bottom of casing is equipped with fixed subassembly, fixed subassembly includes two fixed plates, two the fixed plate symmetry is installed in the both sides of casing bottom, two the adjacent one side symmetry of fixed plate is equipped with splint, splint are connected with the lead screw through the pivot with the adjacent one side of fixed plate, the one end of lead screw runs through the fixed plate and is connected with the carousel.

Preferably, the screw rod is in threaded connection with the fixing plate. In the preferred embodiment, the screw rod is in threaded connection with the fixing plate, so that the screw rod can be rotated to move on the fixing plate.

Preferably, rubber anti-slip pads are bonded on the adjacent sides of the two clamping plates. In the preferred embodiment, the rubber anti-slip pad can increase the friction force between the splint and other equipment, so that the strain gauge is fixed more stably.

Preferably, the top of splint is installed the slider, the bottom both sides of casing correspond the slider and have seted up the slide rail, the slider is sliding connection with the slide rail. In this preferred embodiment, be sliding connection through slider and slide rail, can realize rotating the lead screw and drive splint and move along the direction of slide rail.

Preferably, an anti-slip groove is formed around the outer wall of the turntable. In the preferred embodiment, the friction force of the rotating disk can be increased through the anti-slip grooves, so that the rotating disk is convenient for a user to rotate.

Preferably, a transmission antenna is installed at the center of the top end of the shell and is electrically connected with the single chip microcomputer through a wire. In the preferred embodiment, the data collected by the single chip processor can be transmitted to a remote device through a transmission antenna.

Preferably, the bottom end of one side of the clamping plate is provided with a bolt penetrating through the two clamping plates, and one end of the outer part of the bolt is connected with a nut through threads. In the preferred embodiment, the strain gauge can be further stably fixed on other equipment through a bolt and a nut.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the two turnplates are rotated to push the clamping plates to move towards the excavating equipment, so that the rubber anti-slip pad is abutted against the excavating equipment, and the strain gauge is fixed on the excavating equipment; when the fixed point of the excavating equipment is a narrow round rod or square steel, the bottom ends of the two clamping plates can be connected through the bolts and the nuts, so that the fixing stability is improved, the strain gauge is convenient to mount and dismount, and secondary use is not influenced after the strain gauge is dismounted.

The present invention will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a schematic view of an appearance axial structure of the present invention;

FIG. 2 is a schematic front sectional view of the present invention;

FIG. 3 is an enlarged view of area A of FIG. 1;

fig. 4 is an enlarged view of region B in fig. 2.

In the figure: 1. a housing; 11. a slide rail; 2. a fixing assembly; 21. a fixing plate; 22. a splint; 221. a rubber non-slip mat; 222. a slider; 23. a screw rod; 24. a turntable; 241. an anti-slip groove; 3. a force measuring assembly; 31. a strain gauge; 32. an inductor; 33. a single chip microcomputer; 34. a transmission antenna; 4. a bolt; 41. and a nut.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the utility model are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1-4 heavily, a strain gauge comprises a housing 1, a force measuring assembly 3 is disposed at a central position inside the housing 1, the force measuring assembly 3 includes a strain gauge 31, the strain gauge 31 is fixed on an inner bottom wall of the housing 1, a sensor 32 is connected at a central position of a bottom end of the strain gauge 31, a bottom end of the sensor 32 extends to an outer side of the housing 1, a single chip microcomputer 33 is mounted on an inner top wall of the housing 1, the single chip microcomputer 33 is electrically connected with the strain gauge 31, a fixing assembly 2 is disposed at the bottom end of the housing 1, the fixing assembly 2 includes two fixing plates 21, the two fixing plates 21 are symmetrically mounted at two sides of the bottom end of the housing 1, clamping plates 22 are symmetrically disposed at adjacent sides of the two fixing plates 21, rubber pads 221 are bonded at adjacent sides of the two clamping plates 22, and pass through the rubber pads 221, the friction force between the clamping plate 22 and other devices can be increased, so that the strain gauge is fixed more stably, one side of the clamping plate 22 adjacent to the fixing plate 21 is connected with the screw rod 23 through the rotating shaft, one end of the screw rod 23 penetrates through the fixing plate 21 and is connected with the rotating plate 24, an anti-slip groove 241 is formed around the outer wall of the rotating plate 24, the friction force of the rotating plate 24 can be increased through the anti-slip groove 241, so that a user can rotate the strain gauge conveniently, the screw rod 23 is in threaded connection with the fixing plate 21, the screw rod 23 can be rotated through the threaded connection between the screw rod 23 and the fixing plate 21, so that the screw rod 23 can move on the fixing plate 21, the top end of the clamping plate 22 is provided with the sliding block 222, the sliding rails 11 are formed on two sides of the bottom end of the housing 1, the sliding block 222 is in sliding connection with the sliding rails 11, and the sliding connection between the sliding block 222 and the sliding rail 11 can be realized that the screw rod 23 is rotated to drive the clamping plate 22 to move along the direction of the sliding rails 11,

referring to fig. 2, a transmission antenna 34 is installed at a center position of the top end of the housing 1, the transmission antenna 34 is electrically connected to the single chip microcomputer 33 through a wire, data collected by the single chip microcomputer 33 can be transmitted to a remote device through the transmission antenna 34, a bolt 4 penetrating through the two clamping plates 22 is arranged at the bottom end of one side of each clamping plate 22, a nut 41 is connected to one outer end of each bolt 4 through a thread, and the strain gauge can be further stably fixed on other devices through the bolt 4 and the nut 41.

The specific operation mode of the utility model is as follows:

firstly, a worker clamps the strain gauge with one end of excavating equipment through two clamping plates 22 at the bottom end of a shell 1, so that the bottom end of an inductor 32 is abutted against the excavating equipment, then the two rotary plates 24 are respectively rotated to drive a screw 23 to push the clamping plates 22 to move towards the excavating equipment, so that a rubber anti-skid pad 221 is abutted against the excavating equipment, the strain gauge is fixed on the excavating equipment, when the fixed point of the excavating equipment is a narrow round rod or square steel, the bottom ends of the two clamping plates 22 can be connected through a bolt 4 and a nut 41, the stability of fixing is improved, the vibration force generated when the excavating equipment is used is transmitted to a strain gauge 31 through the inductor 32, the information is transmitted to a single chip microcomputer 33 after being processed by the strain gauge 31, the single chip microcomputer 33 compares the vibration data with preset data, and when the data is larger than the preset data, the information is transmitted to remote equipment through a transmission antenna 34, to remind to reduce the power of the excavation.

The utility model is described above with reference to the accompanying drawings, it is obvious that the utility model is not limited to the above-described embodiments, and it is within the scope of the utility model to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims

1. A strain gauge comprises a shell (1) and is characterized in that a force measuring assembly (3) is arranged at the center inside the shell (1), the force measuring assembly (3) comprises a strain gauge (31), the strain gauge (31) is fixed on the inner bottom wall of the shell (1), the bottom center of the strain gauge (31) is connected with an inductor (32), the bottom end of the inductor (32) extends to the outer side of the shell (1), a single chip microcomputer (33) is installed on the inner top wall of the shell (1), the single chip microcomputer (33) is electrically connected with the strain gauge (31), a fixing assembly (2) is arranged at the bottom end of the shell (1), the fixing assembly (2) comprises two fixing plates (21), the two fixing plates (21) are symmetrically installed on two sides of the bottom end of the shell (1), clamping plates (22) are symmetrically arranged on one side, adjacent to the two fixing plates (21), one side of the clamping plate (22) adjacent to the fixing plate (21) is connected with a screw rod (23) through a rotating shaft, and one end of the screw rod (23) penetrates through the fixing plate (21) and is connected with a rotary disc (24).

2. A strain gauge according to claim 1, characterized in that the screw (23) is screwed to the fixing plate (21).

3. A strain gauge according to claim 1, characterized in that a rubber non-slip pad (221) is glued to the adjacent sides of the two clamping plates (22).

4. The strain gauge according to claim 1, wherein a sliding block (222) is mounted at the top end of the clamping plate (22), sliding rails (11) are arranged on two sides of the bottom end of the housing (1) corresponding to the sliding block (222), and the sliding block (222) is connected with the sliding rails (11) in a sliding manner.

5. The strain gage as set forth in claim 1, characterized in that an anti-slip groove (241) is formed around the outer wall of the turntable (24).

6. The strain gauge according to claim 1, characterized in that a transmission antenna (34) is installed at the center of the top end of the housing (1), and the transmission antenna (34) is electrically connected with the singlechip (33) through a lead.

7. The strain gage as claimed in claim 1, characterized in that the bottom end of one side of the clamping plate (22) is provided with a bolt (4) penetrating through both clamping plates (22), and the outer end of the bolt (4) is connected with a nut (41) through screw threads.