Piezoelectric sensor bearing structure

Abstract

The utility model discloses a piezoelectric sensor bearing structure, comprising an I-beam, a fixing assembly and a buffer device, the I-beam comprises a first beam body and a second beam body; a plurality of dowel bars are fixed to the bottom end of the first beam body, a placement groove is formed in the top end of the second beam body, a piezoelectric sensor is clamped in the placement groove, and the bottom end faces of the dowel bars abut against the top face of the piezoelectric sensor; the fixing assembly comprises clamping plates, and the clamping plates are detachably connected to the two sides of a web of the second beam body and clamp the piezoelectric sensor. The buffering device is located between the first beam body and the second beam body. According to the utility model, the piezoelectric sensor is embedded in the web plate of the I-shaped beam and is clamped by the clamping plate, so that the stability and the detection precision of the piezoelectric sensor in the pressure measurement process are ensured; the buffering assembly provides buffering when the first beam body bears pressure and presses the second beam body, the situation that the dowel bar suddenly presses the piezoelectric sensor to cause damage to the piezoelectric sensor is avoided, and the problem that the detection process of the sensor is inaccurate due to the fact that the piezoelectric sensor is deviated due to stress is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of dynamic weighing, and more specifically to a piezoelectric sensor bearing structure. Background Art

[0002] A piezoelectric sensor is a sensor made using the piezoelectric effect generated by certain dielectrics when stressed. In the road administration field, vehicle weight information can be accurately obtained through piezoelectric sensors. Currently, I-beam type bearing structures are widely used. However, in general I-beam type bearing structures, the sensor needs to be installed in a corresponding cavity on the bearing beam, which may cause cumbersome assembly of the weighing sensor and poor stability. At the same time, if a component of the sensor is damaged during use, it will be difficult to replace.

[0003] The utility model patent (authorization announcement number CN 214583558 U, authorization announcement date November 2, 2021) discloses a piezoelectric sensor bearing beam, including an upper beam, a middle beam and a lower beam, and the upper beam, the middle beam and the lower beam are integrally formed; the upper beam and the lower beam are oppositely arranged; the middle beam is vertically arranged between the upper beam and the lower beam in the length direction; cross-shaped through holes are equidistantly preset on the middle beam, and the cross-shaped through holes are composed of a transverse long strip through hole and a circular through hole located in the middle of the transverse long strip through hole; first transverse flat through holes are symmetrically distributed on both sides of the cross-shaped through hole.

[0004] In the above structure, the piezoelectric sensor is placed in the cross-shaped through hole. The sensor lacks a fixing mechanism, and it is easy to shift when the sensor is stressed, resulting in inaccurate detection by the sensor. And when the bearing beam is compressed, the beam bodies on both sides of the sensor will share part of the pressure for the sensor, resulting in inaccurate detection results of the sensor.

[0005] Therefore, how to provide a bearing structure that can effectively fix a micro piezoelectric sensor, ensure that the piezoelectric sensor does not shift after being stressed, and ensure the accuracy of the detection structure is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0006] In view of this, the utility model provides a piezoelectric sensor bearing structure, aiming to solve the above technical problems.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A piezoelectric sensor bearing structure, comprising:

[0009] I-beam, the I-beam includes a first beam body arranged oppositely and having a T-shaped cross-section and a second beam body having an inverted T-shaped cross-section; a plurality of force transmission rods are fixed along the bottom end of the first beam body, and placing grooves corresponding to the force transmission rods one by one are formed at the top end of the second beam body, and a piezoelectric sensor is clamped in the placing groove, and the bottom end surface of the force transmission rod abuts against the top surface of the piezoelectric sensor;

[0010] Fixing component, the fixing component includes a clamping plate, and the clamping plate is detachably connected to both sides of the web of the second beam body and clamps the piezoelectric sensor;

[0011] Buffer device, there are a plurality of the buffer devices and they are located between the first beam body and the second beam body.

[0012] The beneficial effects of the above technical solution are that the piezoelectric sensor is embedded in the web of the I-beam and clamped by the clamping plate to ensure the stability and detection accuracy during the pressure measurement process of the piezoelectric sensor; the buffer component is used to provide buffering when the first beam body bears pressure and presses towards the second beam body, avoiding damage to the piezoelectric sensor caused by the sudden pressing of the force transmission rod towards the piezoelectric sensor.

[0013] Preferably, the fixing component further includes side plates and rubber pads, the piezoelectric sensor is cylindrical, the clamping plate is an arc-shaped plate, an arc-shaped groove is formed on one side plate surface of the side plate, the clamping plate is slidably connected in the arc-shaped groove, and the end surface of the side plate abuts against the web of the second beam body. The arc-shaped clamping plate can increase the contact area with the piezoelectric sensor to ensure the stability of clamping and fixing the piezoelectric sensor. The rubber pad can protect the piezoelectric sensor and prevent the clamping plate from damaging the outer shell of the piezoelectric sensor. The side plates provide support for the arc-shaped plate. At the same time, the side plates are fixed to the web of the second beam body to ensure a reliable connection between the fixing component and the piezoelectric sensor and the second beam body.

[0014] Preferably, it further includes a screw rod, a threaded hole is formed on the panel of the side plate, and the threaded end of the screw rod penetrates through the threaded hole and is fixed to the convex surface of the clamping plate;

[0015] Installation plates are fixed at both ends of the side plate, and the plate surface of the installation plate is closely attached to the web of the second beam body and fastened by screws.

[0016] The beneficial effects of the above technical solution are that by rotating the screw rod, the arc-shaped plate can slide in the arc-shaped groove, so that the two clamping plates approach or move away from the periphery of the piezoelectric sensor, which is convenient for the maintenance and replacement of the piezoelectric sensor; the installation plate can facilitate the connection and fixation of the fixing component to the first beam body.

[0017] Preferably, a guide tube is fixedly provided perpendicular to the end of the top surface of the flange plate of the second beam body, and a guide rod is fixedly provided at the end of the bottom surface of the flange plate of the first beam body. The guide rod is slidably connected to the inner cavity of the guide tube. The guide rod can limit the moving direction of the first beam body towards the second beam body when the first beam body is compressed. After the first beam body is compressed, it can only slide relative to the second beam body in the vertical direction without deviation. At the same time, it can avoid the deviation of the force transfer rod when pressing against the piezoelectric sensor, resulting in uneven force on the piezoelectric sensor, and improve the detection accuracy of the piezoelectric sensor.

[0018] Preferably, the buffer device includes a slide rod and a spring. A chute is provided at the top end of the second beam body. The slide rod is fixedly provided perpendicular to the bottom end of the first beam body and is slidably connected in the chute. The spring is sleeved on the rod wall of the slide rod, with one end fixedly connected to the bottom end surface of the first beam body and the other end fixedly connected to the top end surface of the second beam body. After the first beam body is compressed, the slide rod can slide up and down in the chute, and the spring is used to provide buffering when the first beam body is compressed, avoiding damage to the piezoelectric sensor caused by the sudden pressing of the force transfer rod against the piezoelectric sensor.

[0019] Preferably, a buffer plate is fixedly provided at the end of the slide rod away from the chute. A fitting groove is provided on one side plate surface of the buffer plate relative to the slide rod. The bottom end of the web of the first beam body is fitted in the fitting groove. The fitting groove can prevent deviation between the first beam body and the buffer plate, resulting in a reduction in the buffering effect.

[0020] Preferably, the number of piezoelectric sensors is not less than two. This ensures the effect of dynamic weighing during the vehicle's driving above the I-beam.

[0021] Through the above technical solutions, compared with the prior art, the present invention discloses a piezoelectric sensor bearing structure. The fixing component is used to clamp and fix the piezoelectric sensor, ensuring that the piezoelectric sensor can remain stable when measuring pressure, avoiding deviation of the piezoelectric sensor under pressure during measurement, resulting in inaccurate measurement results of the piezoelectric sensor, and improving the detection accuracy of the piezoelectric sensor; the force transfer rod is used to concentrate the pressure borne by the top of the first beam body on the piezoelectric sensor, improving the detection accuracy of the piezoelectric sensor; the buffer component is used to provide buffering when the first beam body bears pressure and presses against the second beam body, avoiding damage to the piezoelectric sensor caused by the sudden pressing of the force transfer rod against the piezoelectric sensor, and solving the problem of inaccurate detection process of the sensor caused by the deviation of the piezoelectric sensor under force. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0023] Figure 1 Structural schematic diagram of the assembled sensor provided by the present invention;

[0024] Figure 2 is Figure 1 Enlarged schematic diagram of part A in;

[0025] Figure 3 Structural schematic diagram of the fixing component provided by the present invention;

[0026] Figure 4 Structural schematic diagram of the lower beam body provided by the present invention;

[0027] Figure 5 Cross-sectional view of the load-bearing structure provided by the present invention;

[0028] Figure 6 is Figure 5 Enlarged schematic diagram of part B in.

[0029] Among them,

[0030] 1 - I-beam; 11 - first beam body; 111 - guide rod; 112 - force transmission rod; 12 - second beam body; 121 - guide tube; 122 - placement groove; 123 - sliding groove;

[0031] 2 - piezoelectric sensor;

[0032] 3 - fixing component; 31 - side plate; 32 - clamping plate; 33 - screw; 34 - mounting plate; 35 - rubber pad;

[0033] 4 - buffer component; 41 - buffer plate; 411 - fitting groove; 42 - sliding rod; 43 - spring. Detailed implementation manners

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] See attached Figures 1 to 6, an embodiment of the utility model discloses a force-bearing structure of a piezoelectric sensor, comprising:

[0036] An I-beam 1, the I-beam 1 includes a first beam body 11 and a second beam body 12 which are oppositely arranged, the cross-section of the first beam body 11 is T-shaped, and the cross-section of the second beam body 12 is an inverted T-shaped; a plurality of force-transmitting rods 112 are fixed along the bottom end of the first beam body 11, placement grooves 122 corresponding to the force-transmitting rods 112 one by one are formed at the top end of the second beam body 12, a piezoelectric sensor 2 is clamped in the placement groove 122, and the bottom end surface of the force-transmitting rod 112 abuts against the top surface of the piezoelectric sensor 2;

[0037] A fixing assembly 3, the fixing assembly 3 includes a clamping plate 32, and the clamping plate 32 is detachably connected to both sides of the web of the second beam body 12 and clamps the piezoelectric sensor 2;

[0038] A buffer device 4, there are multiple buffer devices 4 and they are located between the first beam body 11 and the second beam body 12.

[0039] In order to further optimize the above technical solution, improve the clamping stability of the piezoelectric sensor and prevent damage to its housing, the fixing assembly 3 further includes side plates 31 and rubber pads 35, the piezoelectric sensor 2 is cylindrical, the clamping plate 32 is an arc-shaped plate, an arc-shaped groove is formed on one side plate surface of the side plate 31, the clamping plate 32 is slidably connected in the arc-shaped groove, and the end surface of the side plate 31 abuts against the web of the second beam body 12.

[0040] As Figure 2 and 3 shown, the arc-shaped clamping plate can increase the clamping area of the outer peripheral wall of the piezoelectric sensor, the rubber pad is relatively soft, and is embedded between the piezoelectric sensor and the clamping plate, which can prevent damage to the housing of the piezoelectric sensor by the clamping plate.

[0041] In order to further optimize the above technical solution, a screw 33 is further included, a threaded hole is formed on the panel of the side plate 31, and the threaded end of the screw 33 penetrates through the threaded hole and is fixed to the convex surface of the clamping plate 32;

[0042] Installation plates 34 are fixed at both ends of the side plate 31, and the plate surfaces of the installation plates 34 are closely attached to the web of the second beam body 12 and fastened by screws.

[0043] The side plate is fastened to the web of the second beam body by screws to fix the fixing assembly to the I-beam; by rotating the screw, the clamping plate can be moved away from or close to the piezoelectric sensor; after the screw is tightened, the clamping plate can clamp the piezoelectric sensor to realize the fixation of the piezoelectric sensor; after the screw is loosened, it is convenient to replace or disassemble the piezoelectric sensor. The detachable connection mode of the fixing assembly and the second beam body facilitates the assembly of the fixing assembly, and the installation of the piezoelectric sensor is more convenient and fast.

[0044] In this embodiment, in order to ensure that the first beam only makes vertical displacement and does not shift after being compressed, a guide tube 121 is fixedly arranged perpendicular to the end of the top surface of the flange plate of the second beam 12, and a guide rod 111 is fixedly arranged at the end of the bottom surface of the flange plate of the first beam 11. The guide rod 111 is slidably connected to the inner cavity of the guide tube 121. The guide rod can limit the vertical movement of the first beam, prevent it from shifting after being compressed, ensure the stability of the first beam during the movement process, and at the same time avoid the problem of uneven force on the piezoelectric sensor when the force transfer rod presses on the piezoelectric sensor after shifting, thereby improving the detection accuracy of the piezoelectric sensor.

[0045] In this embodiment, to prevent the force transfer rod from suddenly pressing on the piezoelectric sensor and causing damage to the piezoelectric sensor, the buffer device 4 includes a slide rod 42 and a spring 43. A chute 123 is formed at the top end of the second beam 12. The slide rod 42 is fixedly arranged perpendicular to the bottom end of the first beam 11 and is slidably connected in the chute 123. The spring 43 is sleeved on the rod wall of the slide rod 42, one end of which is fixedly connected to the bottom end surface of the first beam 11, and the other end is fixedly connected to the top end surface of the second beam 12.

[0046] To further optimize the above technical solution and prevent the first beam from shifting and affecting the buffering effect of the buffer assembly, a buffer plate 41 is fixedly arranged at the end of the slide rod 42 away from the chute 123. A fitting groove 411 is formed on one side plate surface of the buffer plate 41 opposite to the slide rod 42, and the bottom end of the web of the first beam 11 is fitted in the fitting groove 411.

[0047] To further optimize the above technical solution, the number of piezoelectric sensors 2 is not less than two.

[0048] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method part.

[0049] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A piezoelectric sensor bearing structure, characterized in that: include: An I-beam (1), the I-beam (1) comprising a first beam body (11) arranged opposite to each other and having a T-shaped cross section and a second beam body (12) having an inverted T-shaped cross section; a plurality of force transmission rods (112) are fixed to the bottom end of the first beam body (11); a placement groove (122) corresponding to the force transmission rods (112) is provided at the top end of the second beam body (12); a piezoelectric sensor (2) is clamped in the placement groove (122); and the bottom end surface of the force transmission rod (112) abuts against the top surface of the piezoelectric sensor (2); A fixing assembly (3), the fixing assembly (3) comprising a clamping plate (32), the clamping plate (32) being detachably connected to both sides of the web of the second beam body (12) and clamping the piezoelectric sensor (2); A buffer device (4), wherein the buffer device (4) is multiple and is located between the first beam body (11) and the second beam body (12).

2. A piezoelectric sensor load-bearing structure according to claim 1, characterized in that: The fixing assembly (3) also includes a side plate (31) and a rubber pad (35); the piezoelectric sensor (2) is cylindrical; the clamping plate (32) is an arc-shaped plate; an arc-shaped groove is provided on one side surface of the side plate (31); the clamping plate (32) is slidably connected in the arc-shaped groove; and the end surface of the side plate (31) abuts against the web of the second beam body (12).

3. A piezoelectric sensor load-bearing structure according to claim 2, characterized in that: It also includes a screw rod (33), a threaded hole is opened on the panel of the side plate (31), and the threaded end of the screw rod (33) passes through the threaded hole and is fixed to the convex surface of the clamping plate (32); Mounting plates (34) are fixed to both ends of the side plate (31), and the plate surface of the mounting plate (34) is tightly attached to the web of the second beam body (12) and is fastened by screws.

4. A piezoelectric sensor load-bearing structure according to claim 1, characterized in that: A guide tube (121) is fixed perpendicularly to the top end of the flange plate of the second beam body (12), and a guide rod (111) is fixed to the bottom end of the flange plate of the first beam body (11), wherein the guide rod (111) is slidably connected to the inner cavity of the guide tube (121).

5. A piezoelectric sensor load-bearing structure according to claim 1, characterized in that: The buffer device (4) comprises a slide rod (42) and a spring (43); a slide groove (123) is provided at the top end of the second beam body (12); the slide rod (42) is fixed perpendicularly to the bottom end of the first beam body (11) and is slidably connected in the slide groove (123); the spring (43) is sleeved on the rod wall of the slide rod (42); one end of the spring is fixed to the bottom end surface of the first beam body (11), and the other end is fixed to the top end surface of the second beam body (12).

6. A piezoelectric sensor load-bearing structure according to claim 5, characterized in that: A buffer plate (41) is fixed to one end of the slide rod (42) away from the slide groove (123), and a fitting groove (411) is provided on a side plate surface of the buffer plate (41) opposite to the slide rod (42), and the bottom end of the web of the first beam body (11) is fitted into the fitting groove (411).

7. A piezoelectric sensor load-bearing structure according to claim 1, characterized in that: The number of the piezoelectric sensors (2) is no less than two.

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