Strain force transducer

Abstract

The utility model discloses a strain force transducer, and belongs to the technical field of sensors. The device mainly comprises a shell; the fixing blocks are mounted at the two ends of the shell; the fixed end mounting hole is formed in the upper end of the fixed block; the nut is mounted at the upper end of the fixed block; the bolt is in threaded connection with the nut; the strain beam is mounted in the shell, and the strain beam is of a spring-like type; the strain gauge is mounted on the strain beam; and the aviation plug is arranged at one end of the fixed block. According to the strain force measurement sensor, the sensor is fixed on the measured object through the bolt and the nut, and the effect of simple installation under the conditions that the measured force value is large, the use environment is severe and the like is achieved.

Description

Technical Field

[0001] The present application relates to the field of sensor technology, and in particular to a strain force sensor. Background Art

[0002] A strain force sensor is a sensor that utilizes the strain generated by an elastic body when it is subjected to force. It converts this strain into a change in resistance through a strain gauge attached to the elastic body, and then converts it into a change in voltage or current through a bridge circuit, thereby achieving force measurement.

[0003] For example, the patent with announcement number CN101603865B discloses an attached force sensor. This patent uses the special structure of structural holes and strain beams to concentrate the main deformation of the sensor on the strain beam. Its stress level is higher than that of other parts of the sensor, and has a uniform stress state at the patch position of the strain gauge.

[0004] In the process of implementing the above patent, since the measured force value is large and the impact force is relatively large, for example, large forging machines mostly have a force of thousands of tons, it is difficult to install and detect general sensors. It is not easy to install sensors in harsh operating environments such as large oil storage tanks and large silos.

[0005] Therefore, it is necessary to provide a strain force sensor to solve the above problems.

[0006] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0007] Based on the above problems existing in the prior art, the problem to be solved by the present application is to provide a strain force sensor, which solves the problem that the sensor is difficult to install and detect due to the large measured force value and the harsh operating environment.

[0008] The technical solution adopted by the present application to solve the technical problem is: a strain force sensor, comprising:

[0009] case;

[0010] A fixing block, which is mounted at both ends of the housing;

[0011] A fixed end mounting hole, which is opened at the upper end of the fixed block;

[0012] A nut, which is mounted on the upper end of the fixing block;

[0013] a bolt, the bolt being threadedly connected to the nut;

[0014] A strain beam, which is installed inside the housing, is a spring-like type, and is used to significantly amplify the measured microstrain value;

[0015] A strain gauge, which is mounted on the strain beam;

[0016] An aviation plug is installed at one end of the fixing block.

[0017] Furthermore, a quick-release assembly is fixedly arranged inside the fixed-end mounting hole, and the quick-release assembly includes an anti-dropping bolt threadedly connected inside the fixed-end mounting hole.

[0018] Furthermore, the interior of the fixed end mounting hole is divided into a larger end located at the bottom of the sensor and a smaller end located at the top of the sensor, and a protruding end is formed at the connection between the larger end and the smaller end.

[0019] Furthermore, the bolt passes through the interior of the fixing end mounting hole, and the bolt is divided into a connecting end located at the bottom and a fixing end located at the top, and the outer diameter of the connecting end is larger than the outer diameter of the fixing end.

[0020] Furthermore, a step is formed at the connection between the connecting end and the fixing end.

[0021] Furthermore, the outer diameter of the step is the same as the outer diameter of the connecting end.

[0022] The beneficial effect of the present application is that the present application provides a strain force sensor, which fixes the sensor on the object to be measured by means of bolts and nuts, thereby achieving the effect of easy installation when the measured force value is large and the operating environment is harsh.

[0023] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 It is an overall schematic diagram of a strain force sensor in this application;

[0026] Figure 2 for Figure 1 Schematic diagram of the sensor;

[0027] Figure 3 for Figure 1 Schematic diagram of the sensor cross section;

[0028] Figure 4 for Figure 2 Figure 1. A top view of the sensor in the middle;

[0029] Figure 5 for Figure 1 Schematic diagram of the quick-release assembly;

[0030] Figure 6 This is a schematic diagram of the anti-drop bolt;

[0031] Among them, the reference numerals in the figure are:

[0032] 1. Sensor; 2. Shell; 3. Fixed block; 4. Strain beam; 5. Strain gauge; 6. Fixed end mounting hole; 7. Aviation plug; 8. Quick release assembly; 81. Anti-slip bolt; 810. Nut; 813. Bolt; 812. Step. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0035] like Figure 1-Figure 4 As shown, the present application provides a strain force sensor, including a sensor 1, which is used to convert the deformation caused by an external force into a measurable electrical signal;

[0036] The sensor 1 includes a housing 2, which is used to protect the precision components inside the sensor 1 to prevent the precision components inside from being disturbed by external factors. At the same time, fixed blocks 3 are fixedly arranged at both ends of the housing 2. The fixed blocks 3 are used to firmly mount the sensor 1 on the object to be measured to ensure that the sensor 1 can accurately sense the deformation of the object to be measured. A fixed end mounting hole 6 is opened on the fixed block 3. The fixed end mounting hole 6 can fix the sensor 1 on the object to be measured by bolts, nuts, etc., so as to facilitate fixing and disassembly, and prevent the sensor 1 from accidentally loosening due to excessive vibration or impact during use;

[0037] A strain beam 4 is fixedly arranged inside the housing 2. The strain beam 4 is used to deform under the action of an external force and transmit the deformation. The strain beam 4 is a spring-like type. The strain beam 4 has flexibility and can produce a sensitive response to a tiny external force or deformation. This high sensitivity enables the sensor 1 to capture more subtle stress changes, thereby significantly amplifying the measured micro-strain value.

[0038] At the same time, a strain gauge 5 is fixedly arranged on the strain beam 4, and the strain gauge 5 is used to convert the mechanical deformation on the strain beam 4 into a change in resistance value, and the strain gauge 5 is fixed in the middle position of the strain beam 4, so as to accurately sense and respond to the deformation of the beam;

[0039] An aviation plug 7 is fixedly arranged at one end of the fixed block 3, and the aviation plug 7 is used to transmit the electrical signal converted by the strain gauge 5. At the same time, the aviation plug 7 penetrates the fixed block 3 and is fixedly connected to the housing 2, so as to receive the electrical signal converted by the strain gauge 5;

[0040] When the detection starts, the sensor 1 is fixedly installed on the object by using the fixed end mounting hole 6 on the fixing block 3. At this time, the object to be measured produces a micro deformation under the action of external force, and the sensor 1 fixed on the surface of the object to be measured also produces deformation. The force value of the measured object changes, causing the strain gauges 5 attached to both sides of the strain beam 4 to produce deformation, causing the resistance of the strain gauge 5 to change, and generating a voltage signal. The voltage signal generated by the strain gauge 5 is amplified by the amplifier and output to the outside through the aviation plug 7;

[0041] like Figure 1 and Figure 5-Figure 6 As shown, in order to enable the sensor 1 to be disassembled from the detected object more quickly, a quick-release assembly 8 is fixedly disposed inside the fixed end mounting hole 6, and the quick-release assembly 8 is used to enable the sensor 1 to be disassembled quickly;

[0042] The quick-release assembly 8 includes an anti-slip bolt 81 threadedly connected to the internal thread of the fixed end mounting hole 6, and the anti-slip bolt 81 is used to connect the sensor 1 to the object to prevent the sensor 1 from accidentally loosening due to excessive vibration or impact during use;

[0043] At the same time, the interior of the fixed end mounting hole 6 is divided into a larger end located at the bottom of the sensor 1 and a smaller end located at the top of the sensor 1, and the connection between the larger end and the smaller end forms a protruding end (refer to Figure 5 );

[0044] The anti-drop bolt 81 includes a nut 810 fixedly arranged at the upper end of the fixed end mounting hole 6, and a bolt 813 is threadedly connected to the nut 810. The bolt 813 penetrates the interior of the fixed end mounting hole 6. The bolt 813 is divided into a connecting end located at the bottom and a fixed end located at the top, and the outer diameter of the connecting end is larger than the outer diameter of the fixed end. The fixed end is suitable for sliding inside the fixed end mounting hole 6 so that the bolt 813 can be rotated on the nut 810 to move along the interior of the fixed end mounting hole 6.

[0045] When the rotating bolt 813 moves toward the object to be measured along the inside of the fixed end mounting hole 6, the object to be measured can be firmly connected to the connecting end, and the sensor 1 can be fixed by the nut 810 to prevent the sensor 1 from accidentally loosening due to excessive vibration or impact during use. When the sensor 1 needs to be separated from the object to be measured, the bolt 813 can be rotated in the opposite direction to move the connecting end along the inside of the fixed end mounting hole 6 in a direction away from the object to be measured until the sensor 1 is separated from the object to be measured;

[0046] It should be noted that a step 812 is formed at the connection between the connecting end and the fixed end, and the step 812 is adapted to the protruding end inside the fixed end mounting hole 6, so as to prevent the rotating bolt 813 from being separated from the fixed end mounting hole 6 when it is away from the object to be measured, so as to facilitate the next locking operation of the sensor 1 and the object to be measured;

[0047] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A strain force sensor, characterized in that: include: Housing (2); A fixing block (3), the fixing block (3) being mounted on both ends of the housing (2); A fixed end mounting hole (6), the fixed end mounting hole (6) being formed at the upper end of the fixed block (3); A nut (810), the nut (810) being mounted on the upper end of the fixing block (3); A bolt (813), the bolt (813) being threadedly connected to the nut (810); A strain beam (4), the strain beam (4) being installed inside the housing (2), the strain beam (4) being of a spring-like type, and being used to significantly amplify a measured microstrain value; A strain gauge (5), the strain gauge (5) being mounted on the strain beam (4); An aviation plug (7) is mounted on one end of the fixing block (3).

2. A strain force sensor according to claim 1, characterized in that: A quick-release assembly (8) is fixedly disposed inside the fixed-end mounting hole (6), and the quick-release assembly (8) comprises an anti-dropping bolt (81) threadedly connected to the inside of the fixed-end mounting hole (6).

3. A strain force sensor according to claim 1, characterized in that: The interior of the fixed end mounting hole (6) is divided into a larger end located at the bottom of the sensor (1) and a smaller end located at the top of the sensor (1), and a protruding end is formed at the connection between the larger end and the smaller end.

4. The strain force sensor according to claim 1, characterized in that: The bolt (813) passes through the interior of the fixed end mounting hole (6), and the bolt (813) is divided into a connecting end located at the bottom and a fixed end located at the top, and the outer diameter of the connecting end is larger than the outer diameter of the fixed end.

5. A strain force sensor according to claim 4, characterized in that: A step (812) is formed at the connection between the connecting end and the fixing end.

6. A strain force sensor according to claim 5, characterized in that: The outer diameter of the step (812) is the same as the outer diameter of the connecting end.

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