CN114485876B - Weighing sensor, weighing system and weighing method - Google Patents

Abstract

The application provides a weighing sensor, a weighing system and a weighing method, and relates to the technical field of road weighing, wherein the weighing sensor comprises an elastic body, strain sheets and a spacing structure, wherein a plurality of strain holes are symmetrically arranged on two sides of the elastic body, the strain sheets are arranged in the strain holes, the strain sheets in two adjacent strain holes on the same side form a Wheatstone bridge, the spacing structure is arranged at the bottom of the elastic body, the connecting parts between the symmetrically arranged strain holes are spaced through the spacing structure, so that the strain holes on two sides of the elastic body are separated, when a vehicle is dynamically weighed, the two Wheatstone bridges on two sides of the elastic body obtain different pressure waveform signals, the instantaneous speed of the vehicle passing through the sensor and the running direction of the vehicle are more accurately obtained by combining the size of the weighing sensor, the weight of the vehicle can be more accurately calculated by combining logic and an algorithm, and the dynamic accuracy of the vehicle is improved.

Description

Weighing sensor, weighing system and weighing method

Technical Field

The application relates to the technical field of weighing, in particular to a weighing sensor, a weighing system and a weighing method.

Background

With the continuous development of science and technology, in the scene of road overload prevention and off-site law enforcement, a plurality of weighing sensors arranged in a road can be used for detecting a transport vehicle running in the road to determine whether the transport vehicle has overload behavior.

As shown in fig. 1A and 1B, a schematic structural view and a schematic sectional view of a weighing sensor are respectively shown, an elastic body 1 is disposed above a supporting seat 5, two sides of the elastic body 1 are respectively provided with 2 strain gauge patch holes 2, strain gauges can be attached to the strain gauge patch holes 2, and strain gauges in other strain gauge patch holes 2 are connected through a threading hole 4 and a threading through hole 6, so that a wheatstone bridge is formed. Moreover, the strain gauge patch hole 2 is provided with the force homogenizing groove 3 above, and the strain gauge can form a shearing force through the force homogenizing groove 3 and the supporting seat 5, so that the strain gauge can detect the shearing force, and the weighing sensor can determine the weight of the transport vehicle.

However, the transportation vehicle may adopt actions such as acceleration, deceleration, sudden braking or reversing when passing through the weighing sensor, so that the vehicle speed detected by the weighing sensor is inaccurate, and thus the detected weighing data is inaccurate.

Disclosure of Invention

In view of the above, the embodiment of the application provides a weighing sensor, a weighing system and a weighing method, so as to solve the problem that weighing data of a transport vehicle detected by the weighing sensor in the prior art is inaccurate.

In order to achieve the above object, in a first aspect, an embodiment of the present application provides a load cell including an elastic body, a strain gauge, and a spacing structure;

a plurality of strain holes are symmetrically arranged on two side surfaces of the elastic body, strain sheets are arranged in the strain holes, and the strain sheets in two adjacent strain holes on the same side surface form a Wheatstone bridge;

The spacing structure is arranged at the bottom of the elastic body, and the symmetrically arranged connecting parts between the strain holes are spaced by the spacing structure.

Optionally, the spacing structure includes a plurality of separation grooves, and one separation groove is disposed between each strain hole and the strain hole symmetrical to the other side of the elastic body.

Optionally, the separation groove is a rectangular groove, and a projection of the separation groove in the width direction of the elastomer covers the strain hole.

Optionally, the elastic body is provided with a plurality of strip-shaped strain grooves at intervals along the length direction, the elastic body is divided into an upper part and a lower part by the strip-shaped strain grooves, the upper part is a bearing part, the lower part is a plurality of shear beam structures, and the plurality of shear beam structures are connected into a whole;

In the height direction of the elastic body, the spacing structure penetrates through the shear beam structure.

Optionally, the ends of the elongated strain grooves located at the two ends of the elastic body are opened, and the ends of the elongated strain grooves located at the middle position of the elastic body are closed, so that a supporting point is formed at the middle position of two adjacent elongated strain grooves.

Optionally, the elongated strain grooves are all located inside the elastic body, and the ends of the elongated strain grooves are closed, so that supporting points are formed at two ends of the elongated strain grooves.

Optionally, the weighing sensor further comprises a support plate;

the supporting plate is positioned on the bottom surface of the elastic body and is fixedly connected with the elastic body.

Optionally, 1 to 3 strain gages are disposed in each strain hole.

Optionally, the strain gauge that sets up on the elastomer is the blind hole, be provided with the through wires hole on the blind hole, set up in the blind hole the strain gauge passes through the through wires hole is connected with other the strain gauge.

Optionally, the blind hole is circular.

In a second aspect, embodiments of the present application provide a weighing system comprising a data processing platform and a load cell according to any one of the first aspects;

The load cell is arranged in a road for acquiring a weighing signal related to the weight of a vehicle as the vehicle passes the road;

And the data processing platform is used for acquiring the weight corresponding to the vehicle according to the weighing signal.

In a third aspect, an embodiment of the present application provides a weighing method applied to the load cell according to any one of the first aspect, the method including:

When a vehicle passes through the weighing sensor, two sets of corresponding pressure waveform data are obtained through the weighing sensor when the vehicle enters and leaves;

Determining an instantaneous speed of the vehicle as it passes the load cell based on the two sets of pressure waveform data and the dimensional parameters of the load cell;

And acquiring the weight of the vehicle according to the instantaneous speed of the vehicle and the plurality of sets of pressure waveform data.

According to the weighing sensor provided by the embodiment of the application, the interval structure is arranged in the elastomer of the weighing sensor, so that two groups of Wheatstone bridges positioned at two sides of the elastomer generate different pressure waveform signals, the instantaneous speed of a vehicle passing through the sensor and the running direction of the wheel are more accurately obtained by combining the size parameters of the weighing sensor, the weight of the vehicle can be more accurately calculated by combining logic and an algorithm, and the accuracy of dynamic weighing of the vehicle is improved.

Drawings

FIG. 1A is a schematic diagram of a load cell according to the prior art;

FIG. 1B is a schematic cross-sectional view of a load cell of the prior art;

fig. 2A is a schematic diagram of a weighing scenario involved in a weighing sensor according to an embodiment of the present application;

FIG. 2B is a schematic diagram of an electrical signal collected by a load cell according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a weighing sensor according to an embodiment of the present application;

FIG. 4A is a schematic diagram of another embodiment of a load cell according to the present application;

FIG. 4B is a schematic diagram of a weighing cell according to another embodiment of the present application;

FIG. 4C is a front view of a load cell according to an embodiment of the present application;

FIG. 4D is a side cross-sectional view of a load cell according to an embodiment of the present application;

FIG. 4E is a top view of a load cell according to an embodiment of the present application;

FIG. 4F is a top cross-sectional view of a load cell according to an embodiment of the present application;

FIG. 5A is a schematic diagram of a load cell according to another embodiment of the present application;

FIG. 5B is a schematic diagram of a load cell according to another embodiment of the present application;

FIG. 5C is a schematic diagram of a load cell according to another embodiment of the present application;

FIG. 6 is a schematic diagram of a weighing cell according to another embodiment of the present application;

Fig. 7 is a schematic flow chart of a weighing method according to an embodiment of the present application.

Reference numerals illustrate:

210-vehicle, 220-load cell, 230-data processing platform, 2301-detection circuit, 2302-processor, 410-elastomer, 420-strain gauge, 430-spacer structure, 440-support plate, 411-strain bore, 412-strain groove, and 4301-spacer groove.

Detailed Description

The technical scheme of the application is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

Firstly, a weighing scene related to the weighing sensor provided by the embodiment of the application is introduced.

Referring to fig. 2A, fig. 2A illustrates a weighing scenario involving a load cell according to an embodiment of the present application, where the weighing scenario may include a vehicle 210, a plurality of load cells 220, and a data processing platform 230, and the data processing platform 230 may include a detection circuit 2301 and a processor 2302.

Wherein the plurality of load cells 220 are arranged along the road direction. For example, the plurality of weighing sensors 220 may be arranged continuously or may be arranged at intervals, and the arrangement manner of the plurality of weighing sensors 220 is not limited in the embodiment of the present application.

Moreover, the detection circuit 2301 in the data processing platform 230 is respectively connected to the plurality of weighing sensors 220 and the processor 2302, and is configured to pre-process the electrical signals collected by the plurality of weighing sensors 220, for example, convert analog signals into digital signals, and amplify the digital signals, so that the processor 2302 can calculate according to the amplified digital signals, and obtain the weight of the vehicle 210.

The following description will be given taking an example in which a plurality of load cells 220 are arranged at intervals.

As shown in fig. 2A, during traveling of the vehicle 210, wheels of the vehicle 210 pass through a load cell a provided in a road and then pass through a load cell B. When the vehicle 210 passes through the weighing sensor a, the wheatstone bridge on the left side of the weighing sensor a generates an electric signal according to the received pressure, and then the wheatstone bridge on the right side of the weighing sensor a generates an electric signal according to the received pressure to obtain two electric signals as shown in fig. 2B, so that the running direction of the vehicle 210 can be determined according to the two collected electric signals, the phenomenon that the weighing sensor 220 is disturbed due to reversing or the like of the vehicle 210 is avoided, and the weighing accuracy of the weighing sensor 220 can be improved.

Moreover, by combining the length of time that the vehicle passes the load cell a with the width of the load cell a, the speed at which the vehicle 210 passes the sensor can be calculated, so that the accuracy of calculating the weight of the vehicle 210 can be further improved.

The detection circuit 2301, which is connected to the load cell a, may then convert the collected two electrical signals in analog form to a digital signal. The digital signal is then amplified to provide an amplified digital signal, which is transmitted to the processor 2302.

Correspondingly, the processor 2302 may output parameters such as a vehicle speed and a weight corresponding to the vehicle 210 according to the amplified digital signal in combination with a preset calculation model, so as to determine whether the vehicle 210 is overloaded, and further execute offsite law enforcement according to a determination result.

It should be noted that, for simplicity of description, the weighing scenario is only illustrated by the plurality of weighing sensors 220 and the data processing platform 230. In practical application, the weighing scene may further include a vehicle snapshot recognition device, a video monitoring device, a vehicle information data processing device, etc., which are not described herein.

The following describes a weighing sensor provided in an embodiment of the present application.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a weighing sensor according to an embodiment of the present application, as shown in fig. 3, the length (left-right direction shown in fig. 3) of the weighing sensor is generally set between 300 mm and 2000mm, specifically may be 900mm, and the width is generally set between 50 mm and 200mm, specifically may be 100 mm.

Referring to fig. 4A, fig. 4A is a schematic structural diagram of another weighing cell according to an embodiment of the present application, and as shown in fig. 4A, the weighing cell may include an elastic body 410, a strain gauge 420, and a spacing structure 430.

The elastomer 410 may be made of an alloy steel material or a stainless steel material, and the material of the elastomer 410 is not limited in this embodiment of the present application.

Also, the plurality of strain holes 411 may be symmetrically provided at both sides of the elastic body 410, and the plurality of strain holes 411 located at the same side of the elastic body 410 may be arranged at intervals along the length direction of the elastic body 410.

In addition, each strain hole 411 is internally provided with a strain gauge 420, and two strain gauges 420 positioned on the same side are connected, so that a wheatstone bridge can be formed, deformation generated by the weighting sensor can be detected through the wheatstone bridge when a transport vehicle passes through the weighting sensor, and therefore the weight of the transport vehicle can be determined.

Wherein at least one strain gauge 420 may be disposed in each strain hole 411, the number of strain gauges 420 in the strain holes 411 is related to the strain holes 411, for example, 1 to 3 strain gauges 420 may be disposed in the strain holes 411, and the number of strain gauges 420 in the strain holes 411 is not limited in the embodiment of the present application.

Further, a spacing structure 430 is formed at the bottom of the elastic body 410, and the connecting portions between the symmetrically arranged strain holes 411 are spaced apart by the spacing structure 430.

The thickness of the elastic body 410 between the spacing structure 430 and the strain hole 411 can be adjusted according to the measuring range of the load cell. For example, if the load cell is of a large range, the elastomer 410 between the spacer 430 and the strain hole 411 is also relatively thick, and if the load cell is of a small range, the elastomer 410 between the spacer 430 and the strain hole 411 is also relatively thin.

Specifically, the spacing structure 430 is disposed at the bottom of the elastomer 410 from bottom to top, and the projection of the spacing structure 430 on the side of the elastomer 410 covers each strain hole 411 on the side of the elastomer 410. That is, each strain hole 411 on the side of the elastic body 410 is located within the projection range of the spacing structure 430 on the side of the elastic body 410.

Referring to fig. 4B, 4C, 4D, 4E and 4F, fig. 4B is a schematic structural diagram of another weighing sensor according to an embodiment of the present application, and fig. 4C, 4D, 4E and 4F are front view, side view, cross-section, top view and top view of a weighing sensor according to an embodiment of the present application, respectively.

As shown in fig. 4C, 4D, 4E, and 4F, the spacing structure 430 may include a plurality of separation grooves 4301, one separation groove 4301 being provided between each strain hole 411 and the strain hole 411 symmetrical to the other side of the elastic body 410.

Similarly, the bottom of the body 410 may be provided with a plurality of separation grooves 4301 spaced apart from each other along the length of the body 410 from bottom to top. The projection of each of the separation grooves 4301 on the side of the elastic body 410 may cover two strain holes 411 closest to the separation groove 4301, that is, the strain holes 411 symmetrically arranged on both sides of the separation groove 4301.

Accordingly, any two strain holes 411 symmetrically arranged at both sides of the elastic body 410 may be separated by the separation groove 4301, so that the strain holes 411 at both sides of the elastic body 410 may respectively bear different pressures, thereby respectively acquiring pressure waveform signals when the vehicle passes through the sensor.

Referring to fig. 4A to 4F, the elastic body 410 is further provided with a strain groove 412, and the strain groove 412 has an elongated shape.

The elastic body 410 can be divided into an upper part and a lower part by the long strip-shaped strain groove 412, the upper part of the long strip-shaped strain groove 412 can be a bearing part, a plurality of shear beam structures can be formed below the long strip-shaped strain groove 412, and the plurality of shear beam structures in the weighing sensor are connected into a whole.

Accordingly, the spacing structure 430 may extend through the shear beam structure formed by each of the elongated strain grooves 412 in the height direction of the elastic body 410. Similarly, where the spacer structure 430 includes a plurality of separation grooves 4301, each separation groove 4301 may also correspond one-to-one with each shear beam structure, and each separation groove 4301 may extend through the corresponding shear beam structure.

In practical applications, the load cell may be provided with a plurality of elongated strain grooves 412, and the elongated strain grooves 412 are arranged at intervals along the length direction of the elastic body 410 in the load cell.

While the two ends of the elastic body 410 may take different states in combination with the respective elongated strain grooves 412.

Referring to fig. 3, in an alternative embodiment, the ends of the elongated strain grooves at both ends of the elastic body 410 may be opened, and the ends of the elongated strain grooves 412 at the middle position of the elastic body 410 may be closed, so that support points are formed at the middle positions of the adjacent two elongated strain grooves 412.

Referring to fig. 5A, fig. 5B, and fig. 5C, fig. 5A is a schematic structural diagram of another weighing sensor provided in an embodiment of the present application, fig. 5B is a schematic structural diagram of another weighing unit provided in an embodiment of the present application, and fig. 5C is a top view of another weighing unit provided in an embodiment of the present application.

In another alternative embodiment, the elongated strain grooves 412 may be located inside the elastic body 410, and the ends of the elongated strain grooves 412 are closed, so that support points are formed at the two end positions of the elongated strain grooves 412.

The weighing sensor shown in fig. 5A, 5B and 5C is similar to the weighing sensor shown in fig. 3 and 4A to 4E in terms of structure and principle, and will not be described again here.

Further, in the working process of the weighing sensor, by arranging the interval structure 430 between the strain holes 411 on two sides of the same shear beam structure, the strain holes 411 on two sides can be respectively subjected to different elastic forces to form two shear beam structures, so that different electric signals can be generated through Wheatstone bridges respectively positioned on two sides of the elastic body 410, the running direction of the vehicle can be determined, and the accuracy of detecting the weight of the transport vehicle can be improved.

It should be noted that, for each strain hole 411 provided on the elastic body 410, a threading hole may be provided on the strain hole 411, and the strain gauge 420 provided in the strain hole 411 may be connected to other strain gauges 420 through the threading hole, so as to form a wheatstone bridge.

In addition, the partition groove 4301 provided in the embodiment of the present application may be a rectangular groove, a circular groove, an oval groove, or a groove corresponding to other regular patterns or irregular patterns, which is not limited in the embodiment of the present application.

Similarly, each strain hole 411 provided on the elastic body 410 may be circular, rectangular, or in other regular patterns, and the shape of each strain hole 411 is not limited in the embodiment of the present application.

In addition, it should be noted that, in practical application, the weighing sensor may be machined or manually machined, and the dimensions of the strain hole 411, the elongated strain groove 412 and the spacing structure 430 in the weighing sensor may be set according to the precision of the mechanical device, or may be adjusted according to the precision of the manual machining, and the dimensions of each portion are not limited in the embodiments of the present application.

Further, in order to facilitate measurement of the weight of the transportation vehicle and improve accuracy of detection, the respective strain holes 411 provided on the elastic body 410 may be located at the same height, and the center of each strain hole 411 may be located at a midpoint between the elongated strain groove 412 and the bottom surface of the elastic body 410 in the vertical direction. That is, the distance between the center of each strain hole 411 and the bottom surface of the elastic body 410 is half the distance between the elongated strain groove 412 and the bottom surface of the elastic body 410. In addition, the positions of the strain holes can be set according to actual needs.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a weighing unit according to another embodiment of the present application, and as shown in fig. 6, the weighing unit may further include a support plate 440.

Wherein, the supporting plate 440 is positioned at the bottom surface of the elastic body 410 and is connected with the elastic body 410. Specifically, the support plate 440 may be provided with a coupling hole at which a bolt for coupling the support plate 440 and the elastic body 410 may be provided.

By providing the support plate 440 below the elastic body 410, the process of installing the load cell can be simplified, and the load cell is installed in a direction perpendicular to the plane of the road without considering whether the shear beam structure of the elastic body 410 is in contact with the road or not when the load cell is installed.

In summary, according to the weighing sensor provided by the embodiment of the application, the interval structure is arranged in the elastomer of the weighing sensor, so that the strain holes on two sides of the elastomer are separated, when a vehicle is weighed, the strain holes on two sides of the elastomer are respectively subjected to different pressures, so that the strain holes and the strain sheets in the strain holes are differently deformed, further, different pressure waveforms are generated in the Wheatstone bridge formed by the strain sheets, the speed of the vehicle passing through the sensor is more accurately obtained by combining the size parameters of the weighing sensor, and finally, the weight of the vehicle can be accurately calculated according to the different pressure waveforms and the calculated vehicle speed, so that the accuracy of measuring the weight of the vehicle can be improved.

In addition, the running direction of the vehicle can be determined by combining different pressure waveforms generated by different Wheatstone bridges through the positions of the Wheatstone bridges of the weighing sensor, so that the accuracy of measuring the weight of the vehicle can be improved.

Fig. 7 is a schematic flow chart of a weighing method according to an embodiment of the present application, which may be applied to the above-mentioned load cell, and referring to fig. 7, by way of example and not limitation, the method includes:

And 701, acquiring two groups of pressure waveform data corresponding to the vehicle through the weighing sensor when the vehicle passes through the weighing sensor.

Step 702, determining the instantaneous speed of the vehicle according to the two sets of pressure waveform data and the size parameters of the weighing sensor.

Step 703, obtaining the weight of the vehicle according to the instantaneous speed of the vehicle and the multiple sets of pressure waveform data.

The weighing sensors can be arranged in a road, and a vehicle can pass through a road section where the weighing sensors are located when running on the road. When a vehicle passes through the weighing sensor, the strain hole in the weighing sensor deforms under the action of the shear beam structure under the influence of the dead weight of the vehicle.

Correspondingly, strain gauges in the strain holes are deformed. And each strain gauge in the weighing sensor can form a Wheatstone bridge, when the strain gauge deforms, charges are generated in the strain gauge, so that changing current and voltage appear in the Wheatstone bridge, and waveform data are generated.

Further, when the vehicle passes through the weighing sensor, the strain holes on two sides of the weighing sensor can be sequentially stressed, so that the strain holes on two sides of the weighing sensor are sequentially stressed by different pressures. The wheatstone bridges on both sides of the load cell can generate two different sets of pressure waveform data as shown in fig. 2B according to the different pressures received.

And then, the data processing platform connected with the weighing sensor can calculate the running direction and the instantaneous speed of the vehicle according to the detected two groups of pressure waveform data and combining the preset width of the weighing sensor.

For example, the data processing platform may calculate the speed of the vehicle according to the time difference between the two times when the pressure value is the maximum in the two sets of pressure waveform data. Moreover, according to the two moments of maximum pressure value, the Wheatstone bridge at the two sides of the weighing sensor is combined to determine which side of the weighing sensor the vehicle passes through first and which side of the weighing sensor later, so that the running direction of the vehicle is determined.

And finally, the data processing platform can integrate the two groups of pressure waveforms according to the two groups of pressure waveform data acquired, calculate the weight of the vehicle by combining the detected instantaneous speed of the vehicle, and finish weighing measurement of the vehicle.

In summary, according to the weighing method provided by the embodiment of the application, two sets of pressure waveform data of the vehicle are collected through the weighing sensor, the instantaneous speed of the vehicle is calculated by combining the preset size parameters of the weighing sensor, and finally the weight of the vehicle is calculated by combining the instantaneous speed of the vehicle according to the two sets of pressure waveform data, so that the weighing measurement of the vehicle is completed, and the accuracy of measuring the weight of the vehicle can be improved.

And by combining the positions of the Wheatstone bridges in the weighing sensor, the Wheatstone bridges which the vehicle passes through in sequence can be determined through the two groups of pressure waveform data acquired, so that the running direction of the vehicle is determined, and the accuracy of measuring the weight of the vehicle can be improved.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/device and method may be implemented in other manners. For example, the apparatus/device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.

It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

As used in the present description and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".

Furthermore, the terms "first," "second," "third," and the like in the description of the present specification and in the appended claims, are used for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims (9)

1. The weighing sensor is characterized by comprising an elastomer, a strain gauge and a spacing structure;

a plurality of strain holes are symmetrically arranged on two side surfaces of the elastic body, strain sheets are arranged in the strain holes, and the strain sheets in two adjacent strain holes on the same side surface form a Wheatstone bridge;

the elastic body comprises an elastic body, a spacing structure, a plurality of strain holes, a plurality of elastic body connecting pieces and a plurality of elastic body connecting pieces, wherein the spacing structure is arranged at the bottom of the elastic body, and the connecting pieces between the symmetrically arranged strain holes are spaced through the spacing structure;

the elastic body is divided into an upper part and a lower part by the elongated strain grooves, the upper part is a bearing part, the lower part is a plurality of shear beam structures, and the plurality of shear beam structures are connected into a whole;

In the height direction of the elastomer, the spacing structure penetrates through the shear beam structure;

In the working process of the weighing sensor, the interval structure is arranged between the strain holes on two sides of the same shear beam structure, so that the strain holes on two sides are respectively subjected to different elastic forces to form two shear beam structures, different electric signals can be generated through Wheatstone bridges respectively positioned on two sides of the elastic body, the running direction of the vehicle is determined, and the accuracy of detecting the weight of the transport vehicle is improved.

2. The load cell of claim 1 wherein said spacer structure comprises a plurality of separation grooves, one between each of said strain cells and a strain cell on the other side of said elastomer.

3. The load cell of claim 2 wherein said dividing groove is a rectangular groove and a projection of said dividing groove in a width direction of said elastomer covers said strain hole.

4. The load cell of claim 1 wherein said elongated strain grooves at opposite ends of said elastomer are open at their ends and said elongated strain grooves at intermediate positions of said elastomer are closed at their ends so as to form support points at intermediate positions of adjacent two of said elongated strain grooves.

5. The load cell of claim 1 wherein said elongated strain grooves are all located within said elastomer and wherein ends of said elongated strain grooves are closed such that support points are formed at the locations of the ends of said elongated strain grooves.

6. The load cell of any one of claims 1 to 5, wherein the load cell further comprises a support plate;

the supporting plate is positioned on the bottom surface of the elastic body and is fixedly connected with the elastic body.

7. A load cell according to any one of claims 1 to 5 wherein 1 to 3 strain gages are provided in each strain bore.

8. A weighing system comprising a data processing platform and a load cell according to any one of claims 1 to 7;

The load cell is arranged in a road for acquiring a weighing signal related to the weight of a vehicle as the vehicle passes the road;

And the data processing platform is used for acquiring the weight corresponding to the vehicle according to the weighing signal.

9. A weighing method applied to a load cell according to any one of claims 1 to 7, said method comprising:

When a vehicle passes through the weighing sensor, two sets of corresponding pressure waveform data are obtained through the weighing sensor when the vehicle enters and leaves;

determining an instantaneous speed of the vehicle as it passes the load cell according to the two sets of pressure waveform data and the dimensional parameters of the load cell;

And acquiring the weight of the vehicle according to the instantaneous speed of the vehicle and the two sets of pressure waveform data.