Dynamic force measurement sensor

Abstract

The utility model discloses a dynamic force measuring sensor, comprising a main body assembly, the main body assembly comprises a pedestal, a mounting groove, a piezoelectric plate combination, a fixing plate, a through hole, a connecting bolt, a pressing plate, a driving column and a spacing groove; and the mounting groove is formed in the upper surface of the base. According to the utility model, the piezoelectric patch combination is installed in the installation groove, then the fixing plate and the base are in butt joint and are fixed through the connecting bolt, the pressing plate is placed in the limiting groove, the driving column pushes the pressing plate to move downwards, and after the driving column is screwed down, the upper surface of the base and the piezoelectric patch combination bear pressure together, so that the compressive strength of the sensor is improved; the single piezoelectric plates are combined and matched with the top cover to form the solid dynamic force measurement sensor, the solid dynamic force measurement sensor can be suitable for most use conditions, compared with a hollow structure, the solid dynamic force measurement sensor is higher in adaptability, the use amount of core materials is reduced, the structure is simple, and the installation difficulty and the production cost are reduced.

Description

Technical Field

[0001] This utility model relates to a sensor, specifically a dynamic force measurement sensor, and belongs to the field of sensor technology. Background Technology

[0002] A dynamic force measurement sensor is a device designed to capture and quantify the dynamic forces (such as transient impact forces and periodic alternating forces) experienced by an object in motion, impact, or alternating states in real time. Its core is to convert the rapid changes in mechanical quantities into measurable electrical signals through physical principles such as piezoelectric effect and strain effect. It has the characteristics of fast response speed, wide bandwidth, and strong real-time performance, and can accurately reflect the dynamic change process of force over time.

[0003] A Chinese patent application (publication number: CN106768511B) discloses a piezoelectric dynamic force sensor with high overload and large range. It utilizes six screws to tightly secure a base, a pad, and a fixing plate. Three movable plates are inserted into three notches in the pad. Three set screws screwed into the threaded holes of the fixing plate press the three movable plates onto the first electrode plate, which is composed of three piezoelectric plates placed in three circular grooves in the base. Finally, a cover plate is fixed to the fixing plate using threads. This sensor is suitable for monitoring and early warning of high-impact dynamic forces in large-scale engineering projects and can perform high-amplitude dynamic force measurement in high overload environments exceeding the compressive strength of the piezoelectric plates.

[0004] The publicly disclosed piezoelectric dynamic force sensor, although capable of adapting to high overload environments due to its structural characteristics, still has significant limitations in practical applications: on the one hand, the sensor requires multiple piezoelectric element combinations, which not only increases the amount of core materials used but also increases the complexity of the manufacturing process, directly leading to higher overall costs; on the other hand, the use of three piezoelectric element combinations to achieve specific measurement accuracy and stability makes the overall structure of the sensor more complex, which in turn makes its installation method more complicated. Therefore, a dynamic force measurement sensor is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a dynamic force measurement sensor to solve one of the problems mentioned in the background art.

[0006] This utility model is implemented by the following technical solution: a dynamic force measurement sensor, including a main component, the main component including a base, a mounting groove, a piezoelectric sheet assembly, a fixing plate, a through hole, a connecting bolt, a pressure plate, a drive column and a limiting groove;

[0007] The mounting groove is formed on the upper surface of the base, the piezoelectric sheet assembly is located inside the mounting groove, the limiting groove is formed inside the fixing plate, the shape of the pressure plate is adapted to the shape of the limiting groove, the pressure plate is slidably connected inside the limiting groove, the limiting groove is provided with threads, the drive column is threadedly connected inside the limiting groove, the bottom end of the drive column abuts against the upper surface of the pressure plate, the through hole is formed inside the fixing plate, the connecting bolt is located inside the through hole, and the upper surface of the base is provided with threaded holes.

[0008] As a further preferred embodiment of this technical solution: the lower surface of the fixing plate is attached to the upper surface of the base.

[0009] As a further preferred embodiment of this technical solution: the connecting bolt is threaded into the interior of the threaded hole, and the head of the connecting bolt abuts against the upper surface of the fixing plate.

[0010] As a further preferred embodiment of this technical solution: the lower surface of the pressure plate is attached to the upper surface of the piezoelectric sheet assembly.

[0011] As a further preferred embodiment of this technical solution: a connecting seat is fixedly connected to the upper surface of the fixing plate, and a top cover is threadedly connected to the top of the outer side wall of the connecting seat.

[0012] As a further preferred embodiment of this technical solution: the piezoelectric sheet assembly includes a first electrode sheet, a second electrode sheet, a first piezoelectric sheet, and a second piezoelectric sheet;

[0013] The first electrode sheet, the first piezoelectric sheet, the second electrode sheet, and the second piezoelectric sheet are attached sequentially from top to bottom.

[0014] As a further preferred embodiment of this technical solution, the piezoelectric sheet assembly has lead-out wires.

[0015] As a further preferred embodiment of this technical solution: the outer wall of the base is provided with a wire groove, and the wire passes through the wire groove to the outside of the base.

[0016] Advantages of this utility model:

[0017] 1. This utility model assembles piezoelectric elements in an installation groove, then connects a fixing plate to a base and secures it with connecting bolts. The pressure plate is placed in a limiting groove, and the pressure plate is pushed downward by a drive column. When the drive column is tightened, the upper surface of the base and the piezoelectric element assembly share the pressure, thereby improving the compressive strength of the sensor.

[0018] 2. This utility model uses a single piezoelectric element combined with a top cover to form a solid dynamic force measurement sensor, which can be applied to most operating conditions. Compared with a hollow structure, it has stronger adaptability, reduces the amount of core materials used, has a simple structure, and reduces installation difficulty and production cost. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is an exploded view of the structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the fixing plate structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the piezoelectric sheet assembly structure of this utility model.

[0024] In the diagram: 101, main component; 11, base; 12, mounting groove; 13, wire; 14, piezoelectric plate assembly; 141, first electrode plate; 142, second electrode plate; 143, first piezoelectric plate; 144, second piezoelectric plate; 15, fixing plate; 16, connecting seat; 17, through hole; 18, top cover; 19, connecting bolt; 20, pressure plate; 21, drive column; 22, limiting groove; 23, threaded hole; 24, wire groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example

[0027] Please see Figures 1-4 This utility model provides a technical solution: a dynamic force measurement sensor, including a main component 101, which includes a base 11, a mounting groove 12, a piezoelectric sheet assembly 14, a fixing plate 15, a through hole 17, a connecting bolt 19, a pressure plate 20, a drive column 21, and a limiting groove 22.

[0028] The mounting groove 12 is formed on the upper surface of the base 11, and the piezoelectric sheet assembly 14 is located inside the mounting groove 12. The mounting groove 12 is used to install the piezoelectric sheet assembly 14.

[0029] The limiting groove 22 is opened inside the fixed plate 15. The shape of the pressure plate 20 is adapted to the shape of the limiting groove 22. The pressure plate 20 is slidably connected inside the limiting groove 22. The limiting groove 22 is provided with threads. The drive column 21 is threadedly connected inside the limiting groove 22. The bottom end of the drive column 21 abuts against the upper surface of the pressure plate 20. When the drive column 21 rotates, the drive column 21 can push the pressure plate 20 to move downward, thereby achieving effective pressing of the piezoelectric sheet assembly 14.

[0030] A through hole 17 is formed inside the fixing plate 15, and a connecting bolt 19 is located inside the through hole 17. A threaded hole 23 is formed on the upper surface of the base 11. The lower surface of the fixing plate 15 is attached to the upper surface of the base 11. The connecting bolt 19 is threaded into the inside of the threaded hole 23, and the head of the connecting bolt 19 abuts against the upper surface of the fixing plate 15. The base 11 and the fixing plate 15 can be connected by the connecting bolt 19.

[0031] In this embodiment, specifically: the lower surface of the pressure plate 20 is attached to the upper surface of the piezoelectric sheet assembly 14. During installation, the piezoelectric sheet assembly 14 is placed inside the mounting groove 12, and then the fixing plate 15 is connected to the base 11. The fixing plate 15 is fixed using the connecting bolts 19. At this time, the pressure plate 20 is placed into the limiting groove 22, and the lower surface of the pressure plate 20 is attached to the upper surface of the piezoelectric sheet assembly 14. Then, the drive column 21 is connected to the limiting groove 22. The drive column 21 is rotated, and the bottom end of the drive column 21 is attached to the pressure plate 20 and pushes the pressure plate 20 downward. The pressure plate 20 presses the piezoelectric sheet assembly 14. Then, when the drive column 21 is tightened, the upper surface of the base 11 and the piezoelectric sheet assembly 14 jointly bear the pressure to improve the compressive strength of the sensor and enable the sensor to work normally in a high overload stress environment.

[0032] In this embodiment, specifically: a connecting seat 16 is fixedly connected to the upper surface of the fixing plate 15, and a top cover 18 is threadedly connected to the top of the outer side wall of the connecting seat 16. The top cover 18 is used for bearing pressure. Compared with the prior art, this utility model uses a single piezoelectric sheet combination 14 and cooperates with the top cover 18 to form a solid dynamic force measurement sensor, which can be applied to most working conditions. It has stronger adaptability than a hollow structure, and reduces the amount of core materials used. The structure is simple, and the installation difficulty and production cost are reduced.

[0033] In this embodiment, specifically: the piezoelectric sheet assembly 14 includes a first electrode sheet 141, a second electrode sheet 142, a first piezoelectric sheet 143, and a second piezoelectric sheet 144;

[0034] The first electrode 141, the first piezoelectric sheet 143, the second electrode 142, and the second piezoelectric sheet 144 are attached sequentially from top to bottom, and a wire 13 is led out from the piezoelectric sheet assembly 14.

[0035] In this utility model, the piezoelectric sheet assembly 14 is a prior art. The first electrode sheet 141, the first piezoelectric sheet 143, the second electrode sheet 142, and the second piezoelectric sheet 144 are all prior art and are disclosed in the invention patent with publication number CN106768511B. Therefore, their working principle, structural materials, and electrical connection methods will not be described again.

[0036] In this embodiment, specifically: a wire groove 24 is provided on the outer side wall of the base 11, and the wire 13 passes through the wire groove 24 to the outside of the base 11, and the wire 13 is connected to an external data acquisition system.

[0037] The inside of the cable tray 24 is filled with a silicone sealing ring to achieve an IP67 protection rating, which can resist the corrosion of harsh environments such as salt spray and oil.

[0038] In terms of working principle or structural principle, when in use, the piezoelectric element assembly 14 is installed in the mounting groove 12, the wire 13 is passed out from the wire groove 24, and then the fixing plate 15 is connected to the base 11 and fixed with the connecting bolt 19. The pressure plate 20 is placed into the limiting groove 22, and then the drive column 21 is inserted into the limiting groove 22 and rotated. The bottom end of the drive column 21 is attached to the pressure plate 20 and pushes the pressure plate 20 downward. The pressure plate 20 presses the piezoelectric element assembly 14. Then, when the drive column 21 is tightened, the upper surface of the base 11 and the piezoelectric element assembly 14 jointly bear the pressure to improve the compressive strength of the sensor. Then the top cover 18 is installed on the connecting seat 16. The dynamic force measurement sensor is installed. After connecting the wire 13 to the external data acquisition system, dynamic force detection can be performed.

[0039] Compared with existing technologies, this utility model uses a single piezoelectric element combination 14 and a top cover 18 to form a solid dynamic force measurement sensor, which can be applied to most operating conditions. It is more adaptable than a hollow structure, and reduces the amount of core materials used. The structure is simple, reducing installation difficulty and production costs.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dynamic force measurement sensor, characterized in that, It includes a main body assembly (101), which includes a base (11), a mounting groove (12), a piezoelectric plate assembly (14), a fixing plate (15), a through hole (17), a connecting bolt (19), a pressure plate (20), a drive column (21), and a limiting groove (22). The mounting groove (12) is opened on the upper surface of the base (11), the piezoelectric sheet assembly (14) is located inside the mounting groove (12), the limiting groove (22) is opened inside the fixing plate (15), the shape of the pressure plate (20) is adapted to the shape of the limiting groove (22), the pressure plate (20) is slidably connected to the inside of the limiting groove (22), the inside of the limiting groove (22) is provided with threads, the drive column (21) is threadedly connected to the inside of the limiting groove (22), the bottom end of the drive column (21) abuts against the upper surface of the pressure plate (20), the through hole (17) is opened inside the fixing plate (15), the connecting bolt (19) is located inside the through hole (17), and the upper surface of the base (11) is provided with a threaded hole (23).

2. The dynamic force measurement sensor according to claim 1, characterized in that, The lower surface of the fixing plate (15) is attached to the upper surface of the base (11).

3. A dynamic force measurement sensor according to claim 2, characterized in that, The connecting bolt (19) is threaded into the inside of the threaded hole (23), and the head of the connecting bolt (19) abuts against the upper surface of the fixing plate (15).

4. A dynamic force measurement sensor according to claim 3, characterized in that, The lower surface of the pressure plate (20) is attached to the upper surface of the piezoelectric sheet assembly (14).

5. A dynamic force measurement sensor according to claim 1, characterized in that, The upper surface of the fixing plate (15) is fixedly connected to the connecting seat (16), and the top of the outer side wall of the connecting seat (16) is threadedly connected to the top cover (18).

6. A dynamic force measurement sensor according to claim 1, characterized in that, The piezoelectric sheet assembly (14) includes a first electrode sheet (141), a second electrode sheet (142), a first piezoelectric sheet (143), and a second piezoelectric sheet (144). The first electrode sheet (141), the first piezoelectric sheet (143), the second electrode sheet (142), and the second piezoelectric sheet (144) are attached sequentially from top to bottom.

7. A dynamic force measurement sensor according to claim 6, characterized in that, A wire (13) is led out from the piezoelectric assembly (14).

8. A dynamic force measurement sensor according to claim 7, characterized in that, The outer wall of the base (11) is provided with a wire groove (24), and the wire (13) passes through the wire groove (24) to the outside of the base (11).

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