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CN-224216197-U - Dynamic force measuring sensor

CN224216197UCN 224216197 UCN224216197 UCN 224216197UCN-224216197-U

Abstract

The utility model discloses a dynamic force measurement sensor which comprises a main body assembly, wherein the main body assembly comprises a base, a mounting groove, a piezoelectric sheet combination, a fixing plate, a through hole, a connecting bolt, a pressing plate, a driving column and a limiting groove, and the mounting groove is formed in the upper surface of the base. The piezoelectric plate combination is arranged in the mounting groove, the fixing plate is abutted with the base and fixed by using the connecting bolts, the pressing plate is placed in the limiting groove and pushed to move downwards by the driving column, after the driving column is screwed up, the upper surface of the base and the piezoelectric plate combination bear pressure together to improve the compressive strength of the sensor, and the single piezoelectric plate combination is matched with the top cover to form the solid dynamic force measuring sensor, so that the sensor is applicable to most of use conditions, has stronger adaptability compared with a hollow structure, reduces the consumption of core materials, has a simple structure and reduces the mounting difficulty and the production cost.

Inventors

  • WANG YAOBIN
  • BAI CHENGCHUN
  • Zhang Lieai

Assignees

  • 北京神州翔宇技术有限公司

Dates

Publication Date
20260508
Application Date
20250813

Claims (8)

  1. 1. The dynamic force measurement sensor is characterized by comprising a main body assembly (101), wherein the main body assembly (101) comprises a base (11), a mounting groove (12), a piezoelectric sheet combination (14), a fixed plate (15), a through hole (17), a connecting bolt (19), a pressing plate (20), a driving column (21) and a limiting groove (22); The mounting groove (12) is formed in the upper surface of the base (11), the piezoelectric sheet combination (14) is located in the mounting groove (12), the limiting groove (22) is formed in the fixing plate (15), the shape of the pressing plate (20) is matched with that of the limiting groove (22), the pressing plate (20) is slidably connected in the limiting groove (22), threads are arranged in the limiting groove (22), the driving column (21) is in threaded connection with the inside of the limiting groove (22), the bottom end of the driving column (21) is in contact with the upper surface of the pressing plate (20), the through hole (17) is formed in the fixing plate (15), the connecting bolt (19) is located in the through hole (17), and the threaded hole (23) is formed in the upper surface of the base (11).
  2. 2. A dynamic force measuring sensor according to claim 1, wherein the lower surface of the fixing plate (15) is attached to the upper surface of the base (11).
  3. 3. A dynamic force measuring sensor according to claim 2, wherein the connecting bolt (19) is screwed into the threaded hole (23), and the head of the connecting bolt (19) abuts against the upper surface of the fixing plate (15).
  4. 4. A dynamic force measuring sensor according to claim 3, wherein the lower surface of the pressure plate (20) is attached to the upper surface of the piezoelectric patch assembly (14).
  5. 5. A dynamic force measuring sensor according to claim 1, wherein the upper surface of the fixing plate (15) is fixedly connected with a connecting seat (16), and the top of the outer side wall of the connecting seat (16) is in threaded connection with a top cover (18).
  6. 6. The dynamic force measurement sensor of claim 1, wherein the piezoelectric patch combination (14) comprises a first electrode patch (141), a second electrode patch (142), a first piezoelectric patch (143), and a second piezoelectric patch (144); The first electrode plate (141), the first piezoelectric plate (143), the second electrode plate (142) and the second piezoelectric plate (144) are sequentially attached from top to bottom.
  7. 7. A dynamic force measuring sensor according to claim 6, characterized in that the piezo-electric sheet package (14) is led with wires (13).
  8. 8. A dynamic force measuring sensor according to claim 7, characterized in that the outer side wall of the base (11) is provided with a wire slot (24), and the wire (13) passes out of the wire slot (24) to the outside of the base (11).

Description

Dynamic force measuring sensor Technical Field The utility model relates to a sensor, in particular to a dynamic force measuring sensor, and belongs to the technical field of sensors. Background The dynamic force measuring sensor is a device designed for capturing and quantifying the dynamic force (such as transient impact force, periodic alternating force and the like) of an object in a moving, impacting or alternating state in real time, and has the core of converting the rapid change of mechanical quantity into a measurable electric signal through physical principles such as piezoelectric effect, strain effect and the like, and has the characteristics of high response speed, wide frequency bandwidth, strong real-time performance and the like, and can accurately reflect the dynamic change process of the force along with time. The known Chinese authorized invention (bulletin number: CN 106768511B) discloses a high overload large-range piezoelectric dynamic force sensor, which utilizes six screws to tightly fix a base, a base plate and a fixed plate, three movable plates are plugged into three openings of the base plate, three jackscrews screwed into threaded holes of the fixed plate are utilized to tightly press the three movable plates on a first electrode plate combined by three piezoelectric plates placed in three circular grooves of the base, and finally a cover plate is fixed on the fixed plate by utilizing threads. The method is suitable for monitoring and early warning of high impact dynamic force in large engineering, and can be used for measuring high amplitude dynamic force in a high overload environment exceeding the compressive strength of the piezoelectric sheet; The piezoelectric dynamic force sensor disclosed by the invention can adapt to a high overload environment by virtue of the structural characteristics of the sensor, but has obvious limitations in practical application, on one hand, the sensor needs to be provided with a plurality of groups of piezoelectric sheet combinations, so that the use amount of core materials is increased, the process complexity in the production and processing process is also improved, the overall cost is directly high, and on the other hand, the three groups of piezoelectric sheet combinations are arranged to realize specific measurement precision and stability, so that the overall structure of the sensor is more complicated, and the installation mode of the sensor is correspondingly complicated. Disclosure of utility model The present utility model is directed to a dynamic force measuring sensor, which solves one of the problems set forth in the background art. The dynamic force measuring sensor comprises a main body assembly, wherein the main body assembly comprises a base, a mounting groove, a piezoelectric sheet combination, a fixing plate, a through hole, a connecting bolt, a pressing plate, a driving column and a limiting groove; The mounting groove is formed in the upper surface of the base, the piezoelectric sheet combination is located in the mounting groove, the limiting groove is formed in the fixing plate, the shape of the pressing plate is matched with that of the limiting groove, the pressing plate is slidably connected in the limiting groove, threads are arranged in the limiting groove, the driving column is in threaded connection with the inside of the limiting groove, the bottom of the driving column is abutted to the upper surface of the pressing plate, the through hole is formed in the fixing plate, the connecting bolt is located in the through hole, and a threaded hole is formed in the upper surface of the base. As a further preferable mode of the technical scheme, the lower surface of the fixing plate is attached to the upper surface of the base. As a further preferable mode of the technical scheme, the connecting bolt is in threaded connection with the inside of the threaded hole, and the head of the connecting bolt abuts against the upper surface of the fixing plate. As a further preferable mode of the technical scheme, the lower surface of the pressing plate is attached to the upper surface of the piezoelectric sheet combination. As a further preferable mode of the technical scheme, the upper surface of the fixing plate is fixedly connected with a connecting seat, and the top of the outer side wall of the connecting seat is connected with a top cover in a threaded manner. As a further preferable mode of the technical scheme, the piezoelectric sheet combination comprises a first electrode sheet, a second electrode sheet, a first piezoelectric sheet and a second piezoelectric sheet; the first electrode plate, the first piezoelectric plate, the second electrode plate and the second piezoelectric plate are sequentially attached from top to bottom. As a further preferable mode of the technical scheme, the piezoelectric sheet combination is led out with a wire. As a further preferable mode of the technical scheme, a wire slot is formed in t