Wide plate type quartz piezoelectric dynamic weighing sensor

Abstract

The invention discloses a wide plate type quartz piezoelectric dynamic weighing sensor, which comprises a base, a cover plate and a quartz piezoelectric sensing assembly, and relates to the technical field of weighing sensors. According to the wide plate type quartz piezoelectric dynamic weighing sensor, the arrangement of the top cover plate has a certain protection effect on the internal quartz piezoelectric sensing assembly, the top cover plate is conveniently installed on the base, and the quartz piezoelectric sensing assembly can be limited while the cover plate is installed, so that the quartz piezoelectric sensing assembly is prevented from shifting due to gravity pressing, and the weighing precision is improved. A limiting groove is formed in the bottom of the inner wall of the base, limiting of the quartz piezoelectric sensing assembly is achieved, a cavity matched with the quartz piezoelectric sensing assembly is formed in the web, on one hand, the quartz piezoelectric sensing assembly can be installed in the cavity more easily and conveniently, and on the other hand, the operation is more convenient; on the other hand, the possibility that the quartz plate deviates due to multiple times of pressure in the using process of the quartz piezoelectric sensor is reduced, and therefore the overall precision and stability of the quartz piezoelectric sensor are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of weighing sensors, and particularly to a wide-plate quartz piezoelectric dynamic weighing sensor. Background Art

[0002] Existing weighing sensors are divided into two types. One is the traditional strain-type sensor, and the other is the quartz-type sensor. The former has high weighing accuracy at low speeds. When a vehicle passes at high speed, the weighing accuracy is affected by sensitivity lag, and the weighing confidence is average. The latter has high weighing accuracy at high speeds. Therefore, the weighing sensors used on highways are mostly quartz-type sensors. Quartz is a natural piezoelectric material. When subjected to an external force, electric charges will be generated on the surface of the quartz, that is, the piezoelectric effect. An optical crystal goniometer can be used to measure the direction of the crystal. There are three different cutting methods for the crystal: longitudinal, transverse, and shear. A quartz crystal of a certain cutting method is only sensitive to forces in the corresponding direction, which are respectively called the longitudinal effect, the transverse effect, and the shear effect. Using this property of quartz, a vehicle dynamic weighing instrument can be manufactured. The quartz piezoelectric sensor internally includes an I-shaped carrier and multiple piezoelectric quartz wafers. When a vehicle passes above the sensor, the piezoelectric quartz wafers are crushed and stressed, causing uneven charge distribution, thereby generating a potential difference. This potential difference can be measured and converted into a corresponding physical quantity to calculate the vehicle weight.

[0003] When the sensor is in use, the stress is relatively concentrated at the connection part between the top and the web of the I-shaped carrier, which affects the sensitivity of the sensor. At the same time, long-term use may cause fatigue damage to this part, thereby reducing the service life of the sensor. Existing quartz-type sensors are relatively single, all of which are narrow-strip type. In the driving conditions of vehicles on national and provincial roads, highways, and expressways, there are often congestion, traffic lights, etc. When a vehicle passes at low speed, due to high sensitivity, the signal acquisition time is too short to ensure the weighing confidence. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a wide-plate quartz piezoelectric dynamic weighing sensor, which solves the problems mentioned in the above background art.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: A wide-plate quartz piezoelectric dynamic weighing sensor includes a base, a cover plate, and a quartz piezoelectric sensing assembly. A bottom plate is provided at the bottom of the inner wall of the base, and a web plate is fixedly connected to the top of the bottom plate. The top of the web plate is fixedly connected to a top plate, and a cavity is formed inside the web plate. The quartz piezoelectric sensing assembly is disposed inside the cavity. On both sides of the inner wall of the cover plate, a slide bar is fixedly connected, and an L-shaped plate is slidably connected to the surface of the slide bar. One side of the L-shaped plate penetrates through the cover plate and the base and extends to the outside of the base. A limit groove adapted to the bottom plate is formed at the bottom of the inner wall of the base. On both sides of the bottom plate, a cross plate is fixedly connected, and movable grooves adapted to the cross plates are formed on both sides of the bottom of the inner wall of the base and on both sides of the limit groove.

[0006] Preferably, a vertical plate is fixedly connected to the top of the inner wall of the cover plate, and one end of the slide bar is fixedly connected to one side of the vertical plate. A spring is fixedly connected between the surface of the slide bar and the opposite side of the L-shaped plate and the vertical plate.

[0007] Preferably, a through groove adapted to the L-shaped plate is formed on one side of the base, and a card slot adapted to the cover plate is formed on the top of the base.

[0008] Preferably, a clamping rod is fixedly connected to the bottom of the inner wall of the movable groove. The top end of the clamping rod penetrates through the cross plate and extends to the top of the cross plate.

[0009] Preferably, the number of the quartz piezoelectric sensing assemblies is three, and the quartz piezoelectric sensing assemblies are arranged at equal intervals.

[0010] Preferably, the quartz piezoelectric sensing assembly includes a limit plate. A quartz sheet is disposed on the top of the limit plate, an upper electrode is disposed on the top of the limit plate, and a lower electrode is disposed on the bottom of the limit plate.

[0011] Preferably, an upper backing plate is disposed on the top of the upper electrode, an isolation sheet is disposed on the bottom of the lower electrode, and a lower backing plate is disposed on the bottom of the isolation sheet. End caps are disposed on both sides of the limit plate.

[0012] Preferably, inclined plates are fixedly connected to both sides of the cover plate, an anti-slip backing plate is disposed on the top of the cover plate, a pressing plate is fixedly connected to the bottom of the cover plate, and a protection plate is fixedly connected between the top plate and the bottom plate and on the surface of the web plate.

[0013] Beneficial effects

[0014] The present invention provides a wide-plate quartz piezoelectric dynamic weighing sensor. Compared with the prior art, the following beneficial effects are achieved:

[0015] The wide-plate quartz piezoelectric dynamic weighing sensor is provided with a bottom plate at the bottom of the inner wall of the base. The top of the bottom plate is fixedly connected with a web plate, and the top of the web plate is fixedly connected with a top plate. A cavity is formed inside the web plate, and the quartz piezoelectric sensing component is arranged inside the cavity. Both sides of the inner wall of the cover plate are fixedly connected with slide bars, and an L-shaped plate is slidably connected to the surface of the slide bars. One side of the L-shaped plate penetrates through the cover plate and the base and extends to the outside of the base. A limiting groove adapted to the bottom plate is formed at the bottom of the inner wall of the base. Transverse plates are fixedly connected to both sides of the bottom plate, and movable grooves adapted to the transverse plates are formed on both sides of the bottom of the inner wall of the base and on both sides of the limiting groove. The setting of the top cover plate has a certain protective effect on the internal quartz piezoelectric sensing component, and the top cover plate is convenient to install on the base, with relatively simple operation. When the cover plate is installed, it can also limit the quartz piezoelectric sensing component to prevent displacement due to gravity pressure. The limiting groove is arranged at the bottom of the inner wall of the base, realizing the limitation of the quartz piezoelectric sensing component. A cavity adapted to the quartz piezoelectric sensing component is arranged inside the web plate. On the one hand, it makes the operation of loading the quartz piezoelectric sensing component into the cavity simpler and more convenient. On the other hand, it reduces the possibility of the quartz wafer shifting due to multiple pressures during the use of the quartz piezoelectric sensor, thereby improving the overall accuracy and stability of the quartz piezoelectric sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the structure of the present invention;

[0017] Figure 2 is a schematic structural view of the base of the present invention;

[0018] Figure 3 is a top view of the base structure of the present invention;

[0019] Figure 4 is a cross-sectional view of the base structure of the present invention;

[0020] Figure 5 is an exploded view of the structure of the quartz piezoelectric sensing component of the present invention;

[0021] Figure 6 For the present invention Figure 2 is a partially enlarged view at A in.

[0022] In the figure: 1 - base, 2 - cover plate, 3 - quartz piezoelectric sensing component, 31 - limiting plate, 32 - quartz wafer, 33 - upper electrode, 34 - lower electrode, 35 - upper backing plate, 36 - spacer, 37 - lower backing plate, 38 - end cap, 4 - bottom plate, 5 - web plate, 6 - top plate, 7 - cavity, 8 - slide bar, 9 - L-shaped plate, 10 - limiting groove, 11 - transverse plate, 12 - movable groove, 13 - vertical plate, 14 - spring, 15 - through groove, 16 - clamping groove, 17 - clamping bar, 18 - inclined plate, 19 - anti-slip backing plate, 20 - pressing plate, 21 - protection plate. Detailed implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-6 , the present invention provides a technical solution: a wide-plate quartz piezoelectric dynamic weighing sensor, which includes a base 1, a cover plate 2 and a quartz piezoelectric sensing component 3. A bottom plate 4 is provided at the bottom of the inner wall of the base 1, and a web plate 5 is fixedly connected to the top of the bottom plate 4. The top of the web plate 5 is fixedly connected to a top plate 6, and a cavity 7 is provided inside the web plate 5. The quartz piezoelectric sensing component 3 is arranged inside the cavity 7. Both sides of the inner wall of the cover plate 2 are fixedly connected with slide bars 8, and an L-shaped plate 9 is slidably connected to the surface of the slide bars 8. One side of the L-shaped plate 9 penetrates through the cover plate 2 and the base 1 and extends to the outside of the base 1. A limiting groove 10 adapted to the bottom plate 4 is provided at the bottom of the inner wall of the base 1. Cross plates 11 are fixedly connected to both sides of the bottom plate 4, and movable grooves 12 adapted to the cross plates 11 are provided on both sides of the bottom of the inner wall of the base 1 and located on both sides of the limiting groove 10.

[0025] Specifically, the setting of the top cover plate 2 has a certain protective effect on the internal quartz piezoelectric sensing component 3, and the top cover plate 2 is convenient to be installed on the base 1, and the operation is relatively simple. When the cover plate 2 is installed, the quartz piezoelectric sensing component 3 can also be limited, avoiding displacement due to gravity pressure. A limiting groove 10 is provided at the bottom of the inner wall of the base 1, realizing the limitation of the quartz piezoelectric sensing component 3. A cavity 7 adapted to the quartz piezoelectric sensing component 3 is provided inside the web plate 5. On the one hand, it makes the operation of installing the quartz piezoelectric sensing component 3 into the cavity 7 simpler and more convenient. On the other hand, it reduces the possibility that the quartz chip of the quartz piezoelectric sensor 3 is displaced due to multiple pressures during use, thereby improving the overall accuracy and stability of the quartz piezoelectric sensor 3.

[0026] In the present invention, a vertical plate 13 is fixedly connected to the top of the inner wall of the cover plate 2, and one end of the slide bar 8 is fixedly connected to one side of the vertical plate 13. A spring 14 is fixedly connected between the surface of the slide bar 8 and the side of the L-shaped plate 9 opposite to the vertical plate 13.

[0027] In the present invention, a through groove 15 adapted to the L-shaped plate 9 is provided on one side of the base 1, and a card slot 16 adapted to the cover plate 2 is provided on the top of the base 1.

[0028] In the present invention, a clamping rod 17 is fixedly connected to the bottom of the inner wall of the movable slot 12, and the top end of the clamping rod 17 penetrates through the cross plate 11 and extends to the top of the cross plate 11.

[0029] In the present invention, the number of the quartz piezoelectric sensing components 3 is set to three, and the quartz piezoelectric sensing components 3 are arranged at equal intervals.

[0030] In the present invention, the quartz piezoelectric sensing component 3 includes a limiting plate 31. A quartz sheet 32 is arranged on the top of the limiting plate 31, and an upper electrode 33 is arranged on the top of the limiting plate 31. A lower electrode 34 is arranged on the bottom of the limiting plate 31.

[0031] In the present invention, an upper backing plate 35 is arranged on the top of the upper electrode 33, an isolation sheet 36 is arranged on the bottom of the lower electrode 34, a lower backing plate 37 is arranged on the bottom of the isolation sheet 36, and end caps 38 are arranged on both sides of the limiting plate 31.

[0032] In the present invention, inclined plates 18 are fixedly connected to both sides of the cover plate 2, an anti-slip backing plate 19 is arranged on the top of the cover plate 2, a pressing plate 20 is fixedly connected to the bottom of the cover plate 2, and a protection plate 21 is fixedly connected between the top plate 6 and the bottom plate 4 and on the surface of the web 5.

[0033] Meanwhile, the content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0034] In use, align the bottom plate 4 with the limiting groove 10 on the base 1, and place the bottom plate 4 inside the base 1. Before placing the bottom plate 4 inside the base 1, place the quartz piezoelectric sensing component 3 inside the web 5. The cross plate 11 on the bottom plate 4 is penetrated by the clamping rod 17 on the movable groove 12 to limit the cross plate 11. Then cover the cover plate 2 on the top of the base 1, and the cover plate 2 will be stuck in the card slot 16 of the base 1. Loosen the L-shaped plate 9, and the spring 14 on the sliding rod 8 will push the two L-shaped plates 9 to move in opposite directions. The L-shaped plates 9 will pass through the base 1, and the cover plate 2 will be limited through the through groove 15 adapted to the L-shaped plate 9. Install the lower backing plate 37 below the fixed part of the limiting plate 31, then install the isolation sheet 36 above the lower backing plate 37, install the lower electrode 34 above the isolation sheet 36, then install each quartz sheet 32 into the corresponding positioning holes respectively, and then install the upper electrode 33 above the fixed part of the limiting plate 31 so that the upper electrode 33 contacts the top surfaces of the quartz sheets 32 respectively, and the lower electrode 34 contacts the bottom surfaces of the quartz sheets 32 respectively. Finally, install the upper backing plate 35 above the upper electrode 33. At this time, the assembly of the main body of the quartz piezoelectric sensing component 3 is completed. After that, the assembled main body of the quartz piezoelectric sensing component 3 needs to be installed into the cavity 7 on the web 5. When pressure acts on the quartz piezoelectric dynamic weighing sensor, the quartz sheets 32 in the quartz piezoelectric sensing component 3 generate a piezoelectric effect and output charges. The charges are collected by the upper electrode 33 and the lower electrode 34 and transmitted through the cable to the corresponding equipment of the dynamic weighing system for analysis and processing.

[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wide-plate quartz piezoelectric dynamic weighing sensor, comprising a base (1), a cover plate (2) and a quartz piezoelectric sensing assembly (3), characterized in that: At the bottom of the inner wall of the base (1), a bottom plate (4) is provided, and at the top of the bottom plate (4), a web plate (5) is fixedly connected. At the top of the web plate (5), a top plate (6) is fixedly connected, and a cavity (7) is formed inside the web plate (5). The quartz piezoelectric sensing component (3) is arranged inside the cavity (7). On both sides of the inner wall of the cover plate (2), sliding rods (8) are fixedly connected, and an L-shaped plate (9) is slidably connected to the surface of the sliding rods (8). One side of the L-shaped plate (9) penetrates through the cover plate (2) and the base (1) and extends to the outside of the base (1). A limiting groove (10) adapted to the bottom plate (4) is formed at the bottom of the inner wall of the base (1). On both sides of the bottom plate (4), transverse plates (11) are fixedly connected. At the bottom of the inner wall of the base (1) and on both sides of the limiting groove (10), moving grooves (12) adapted to the transverse plates (11) are formed.

2. The wide-plate quartz piezoelectric dynamic weighing sensor according to claim 1, characterized in that: At the top of the inner wall of the cover plate (2), a vertical plate (13) is fixedly connected, and one end of the sliding rod (8) is fixedly connected to one side of the vertical plate (13). A spring (14) is fixedly connected between the surface of the sliding rod (8) and the side of the L-shaped plate (9) opposite to the vertical plate (13).

3. A wide-plate quartz piezoelectric dynamic weighing sensor according to claim 1, characterized in that: A through groove (15) adapted to the L-shaped plate (9) is formed on one side of the base (1), and a clamping groove (16) adapted to the cover plate (2) is formed at the top of the base (1).

4. A wide-plate quartz piezoelectric dynamic weighing sensor according to claim 1, characterized in that: At the bottom of the inner wall of the moving groove (12), a clamping rod (17) is fixedly connected. The top end of the clamping rod (17) penetrates through the transverse plate (11) and extends to the top of the transverse plate (11).

5. A wide-plate quartz piezoelectric dynamic weighing sensor according to claim 1, characterized in that: The number of the quartz piezoelectric sensing components (3) is three, and the quartz piezoelectric sensing components (3) are arranged at equal intervals.

6. A wide-plate quartz piezoelectric dynamic weighing sensor according to claim 1, characterized in that: The quartz piezoelectric sensing component (3) includes a limiting plate (31). At the top of the limiting plate (31), a quartz sheet (32) is arranged, and at the top of the limiting plate (31), an upper electrode (33) is arranged. At the bottom of the limiting plate (31), a lower electrode (34) is arranged.

7. The wide-plate quartz piezoelectric dynamic weighing sensor according to claim 6, characterized in that: At the top of the upper electrode (33), an upper backing plate (35) is arranged. At the bottom of the lower electrode (34), an isolation sheet (36) is arranged, and at the bottom of the isolation sheet (36), a lower backing plate (37) is arranged. End caps (38) are arranged on both sides of the limiting plate (31).

8. A wide-plate quartz piezoelectric dynamic weighing sensor according to claim 1, characterized in that: On both sides of the cover plate (2), inclined plates (18) are fixedly connected, and at the top of the cover plate (2), an anti-slip backing plate (19) is arranged. At the bottom of the cover plate (2), a pressing plate (20) is fixedly connected. A protection plate (21) is fixedly connected between the top plate (6) and the bottom plate (4) and on the surface of the web plate (5).

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