Weighing sensor, weighing system and weighing method

Abstract

The present application provides a weighing sensor, a weighing system and a weighing method, which relate to the field of road weighing technology, wherein the weighing sensor comprises: an elastic body, a strain gauge and a spacing structure; a plurality of strain holes are symmetrically arranged on both side surfaces of the elastic body, strain gauges are arranged in the strain holes, and the strain gauges in two adjacent strain holes on the same side form a Wheatstone bridge; the spacing structure is opened at the bottom of the elastic body, and the connecting parts between the symmetrically arranged strain holes are spaced apart by the spacing structure, so that the strain holes on both sides of the elastic body are separated, so that when the vehicle is dynamically weighed, the two groups of Wheatstone bridges on both sides of the elastic body obtain different pressure waveform signals, and the instantaneous speed of the vehicle passing the sensor and the driving direction of the wheels can be more accurately obtained in combination with the size of the weighing sensor; and the weight of the vehicle can be more accurately calculated in combination with logic and algorithm, thereby improving the accuracy of dynamic weighing of the vehicle.

Description

Technical Field

[0001] The present application relates to the field of weighing technology, and in particular to a weighing sensor, a weighing system and a weighing method. Background Art

[0002] With the continuous development of science and technology, in the scenario of non-site law enforcement of road overload control, multiple weighing sensors installed on the road can be used to detect transport vehicles traveling on the road to determine whether the transport vehicles are overloaded or not.

[0003] like Figure 1A and Figure 1B As shown, a structural schematic diagram and a cross-sectional schematic diagram of a weighing sensor are respectively shown, wherein an elastic body 1 is arranged above a support seat 5, and two strain gauge patch holes 2 are arranged on both sides of the elastic body 1, respectively, and strain gauges can be attached to the strain gauge patch holes 2, and connected to strain gauges in other strain gauge patch holes 2 through threading holes 4 and threading through holes 6, thereby forming a Wheatstone bridge. Moreover, a uniform force groove 3 is arranged above the strain gauge patch hole 2, and a shear force can be formed on the strain gauge through the uniform force groove 3 and the support seat 5, so that the strain gauge can detect the shear force, and thus the weighing sensor can determine the weight of the transport vehicle.

[0004] However, when a transport vehicle passes through a weighing sensor, it may accelerate, decelerate, brake suddenly or reverse, causing the vehicle speed detected by the weighing sensor to be inaccurate, thereby causing the weighing data detected to be inaccurate. Summary of the invention

[0005] In view of this, the embodiments of the present application propose a weighing sensor, a weighing system and a weighing method to solve the problem of inaccurate weighing data of a transport vehicle detected by a weighing sensor in the prior art.

[0006] In order to achieve the above-mentioned object, in a first aspect, an embodiment of the present application provides a weighing sensor, the weighing sensor comprising: an elastic body, a strain gauge and a spacing structure;

[0007] A plurality of strain holes are symmetrically arranged on both side surfaces of the elastic body, strain gauges are arranged in the strain holes, and the strain gauges in two adjacent strain holes on the same side form a Wheatstone bridge;

[0008] The spacing structure is opened at the bottom of the elastic body, and the connection parts between the symmetrically arranged strain holes are spaced apart by the spacing structure.

[0009] Optionally, the spacing structure includes a plurality of separation grooves, and one separation groove is arranged between each of the strain holes and a symmetrical strain hole on the other side of the elastic body.

[0010] Optionally, the separation groove is a rectangular groove, and the projection of the separation groove in the width direction of the elastic body covers the strain hole.

[0011] Optionally, the elastic body is provided with a plurality of long strip strain grooves at intervals along the length direction, and the elastic body is divided into an upper and a lower part by the long strip strain grooves, the upper part is a load-bearing part, and the lower part is a plurality of shear beam structures, and the plurality of shear beam structures are connected as one;

[0012] In the height direction of the elastic body, the spacing structure penetrates the shear beam structure.

[0013] Optionally, the ends of the elongated strain grooves at both ends of the elastic body are open, and the ends of the elongated strain grooves at the middle position of the elastic body are closed, so that a support point is formed in the middle position of two adjacent elongated strain grooves.

[0014] Optionally, the elongated strain grooves are all located inside the elastic body, and the ends of the elongated strain grooves are closed, so that support points are formed at both ends of the elongated strain grooves.

[0015] Optionally, the weighing sensor further comprises: a support plate;

[0016] The support plate is located on the bottom surface of the elastic body and is fixedly connected to the elastic body.

[0017] Optionally, 1 to 3 strain gauges are arranged in each strain hole.

[0018] Optionally, the strain hole provided on the elastic body is a blind hole, and a threading hole is provided on the blind hole, and the strain gauge provided in the blind hole is connected to other strain gauges through the threading hole.

[0019] Optionally, the blind hole is circular.

[0020] In a second aspect, an embodiment of the present application provides a weighing system, the weighing system comprising: a data processing platform and a weighing sensor as described in any one of the first aspects;

[0021] The weighing sensor is arranged in the road and is used to obtain a weighing signal related to the weight of the vehicle when the vehicle passes through the road;

[0022] The data processing platform is used to obtain the weight corresponding to the vehicle according to the weighing signal.

[0023] In a third aspect, an embodiment of the present application provides a weighing method, applied to a weighing sensor as described in any one of the first aspects, the method comprising:

[0024] When a vehicle passes through the weighing sensor, two sets of pressure waveform data corresponding to when the vehicle enters and leaves are obtained through the weighing sensor;

[0025] Determining the instantaneous speed of the vehicle when passing the weighing sensor according to the two sets of pressure waveform data and the size parameters of the weighing sensor;

[0026] The weight of the vehicle is obtained according to the instantaneous speed of the vehicle and the multiple sets of pressure waveform data.

[0027] A weighing sensor provided in an embodiment of the present application provides a spacing structure in the elastic body of the weighing sensor so that two groups of Wheatstone bridges located on both sides of the elastic body generate different pressure waveform signals. Combined with the size parameters of the weighing sensor, the instantaneous speed of the vehicle passing the sensor and the driving direction of the wheels can be more accurately obtained; combined with logic and algorithms, the weight of the vehicle can be calculated more accurately, thereby improving the accuracy of dynamic weighing of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1A It is a structural schematic diagram of a weighing sensor provided in the prior art;

[0029] Figure 1B A cross-sectional schematic diagram of a weighing sensor provided in the prior art;

[0030] Figure 2A A schematic diagram of a weighing scenario involved in a weighing sensor provided in an embodiment of the present application;

[0031] Figure 2B A schematic diagram of an electrical signal collected by a weighing sensor provided in an embodiment of the present application;

[0032] Figure 3 A structural schematic diagram of a weighing sensor provided in an embodiment of the present application;

[0033] Figure 4A A schematic diagram of the structure of another weighing sensor provided in an embodiment of the present application;

[0034] Figure 4B A schematic diagram of the structure of another weighing sensor provided in an embodiment of the present application;

[0035] Figure 4C A front view of a weighing sensor provided in an embodiment of the present application;

[0036] Figure 4D A side cross-sectional view of a weighing sensor provided in an embodiment of the present application;

[0037] Figure 4EA top view of a weighing sensor provided in an embodiment of the present application;

[0038] Figure 4F A top view of a weighing sensor provided in an embodiment of the present application;

[0039] Figure 5A A schematic diagram of the structure of another weighing sensor provided in an embodiment of the present application;

[0040] Figure 5B A schematic diagram of the structure of another weighing sensor provided in an embodiment of the present application;

[0041] Figure 5C A schematic diagram of the structure of another weighing sensor provided in an embodiment of the present application;

[0042] Figure 6 A schematic diagram of the structure of another weighing sensor provided in an embodiment of the present application;

[0043] Figure 7 A schematic diagram of a weighing method provided in an embodiment of the present application.

[0044] Description of reference numerals:

[0045] 210 - vehicle, 220 - weighing sensor, 230 - data processing platform, 2301 - detection circuit, 2302 - processor, 410 - elastomer, 420 - strain gauge, 430 - spacing structure, 440 - support plate, 411 - strain hole, 412 - strain slot, and 4301 - separation slot. DETAILED DESCRIPTION

[0046] The technical solution of the present application is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0047] First, the weighing scenarios involved in the weighing sensor provided in the embodiments of the present application are introduced.

[0048] See also Figure 2A , Figure 2A A weighing scenario involving a weighing sensor provided in an embodiment of the present application is shown. The weighing scenario may include: a vehicle 210, multiple weighing sensors 220 and a data processing platform 230. The data processing platform 230 may include: a detection circuit 2301 and a processor 2302.

[0049] The multiple weighing sensors 220 are arranged along the road direction. For example, the multiple weighing sensors 220 can be arranged continuously or at intervals. The embodiment of the present application does not limit the arrangement of the multiple weighing sensors 220.

[0050] Moreover, the detection circuit 2301 in the data processing platform 230 is respectively connected to multiple weighing sensors 220 and the processor 2302, and is used to pre-process the electrical signals collected by the multiple weighing sensors 220, such as converting analog signals into digital signals and amplifying the digital signals, so that the processor 2302 can calculate based on the amplified digital signals to obtain the weight of the vehicle 210.

[0051] The following description will be made by taking the case where a plurality of weighing sensors 220 are arranged at intervals as an example.

[0052] like Figure 2A As shown, during the driving process of the vehicle 210, the wheels of the vehicle 210 first pass the weighing sensor A set in the road, and then pass the weighing sensor B. When the vehicle 210 passes the weighing sensor A, the Wheatstone bridge on the left side of the weighing sensor A first generates an electrical signal according to the pressure received, and then the Wheatstone bridge on the right side of the weighing sensor A generates an electrical signal according to the pressure received, and the result is as follows Figure 2B The two electrical signals shown can determine the driving direction of the vehicle 210 based on the two collected electrical signals, avoiding the phenomenon of the vehicle 210 reversing and disrupting the weighing of the weighing sensor 220, thereby improving the weighing accuracy of the weighing sensor 220.

[0053] Moreover, the speed of the vehicle 210 when passing the sensor can be calculated by combining the length of time the vehicle passes through the weighing sensor A with the width of the weighing sensor A, thereby further improving the accuracy of calculating the weight of the vehicle 210.

[0054] Afterwards, the detection circuit 2301 connected to the weighing sensor A can convert the two collected analog electrical signals to obtain digital signals. Afterwards, the digital signals are amplified to obtain amplified digital signals, and the amplified digital signals are transmitted to the processor 2302.

[0055] Correspondingly, the processor 2302 can output the speed and weight and other parameters corresponding to the vehicle 210 based on the amplified digital signal in combination with a pre-set calculation model, thereby determining whether the vehicle 210 is overloaded or not, and then performing non-site enforcement based on the judgment result.

[0056] It should be noted that, for the sake of simplicity, the present application embodiment only illustrates the weighing scenario by taking multiple weighing sensors 220 and a data processing platform 230 as an example. In actual applications, the weighing scenario may also include: vehicle capture and recognition equipment, video monitoring equipment, and vehicle information data processing equipment, etc., which will not be described in detail in the present application embodiment.

[0057] The following is an introduction to a weighing sensor provided in an embodiment of the present application.

[0058] See also Figure 3 , Figure 3 A structural diagram of a weighing sensor provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the length of the load cell ( Figure 3 The left and right directions shown in the figure are generally set between 300 and 2000 mm, and specifically can be 900 mm. The width is generally set between 50 and 200 mm, and specifically can be 100 mm. The embodiment of the present application does not limit the length and width of the weighing sensor.

[0059] See also Figure 4A , Figure 4A A structural diagram of another weighing sensor provided in an embodiment of the present application is shown in FIG. Figure 4A As shown, the weighing unit may include: an elastic body 410 , a strain gauge 420 and a spacing structure 430 .

[0060] The elastic body 410 may be made of alloy steel material or stainless steel material. The embodiment of the present application does not limit the material of the elastic body 410 .

[0061] Moreover, a plurality of strain holes 411 may be symmetrically arranged on both sides of the elastic body 410 , and the plurality of strain holes 411 located on the same side of the elastic body 410 may be arranged at intervals along the length direction of the elastic body 410 .

[0062] In addition, a strain gauge 420 is provided in each strain hole 411, and two strain gauges 420 located on the same side are connected to form a Wheatstone bridge, so that when a transport vehicle passes through the weighing sensor, the deformation generated by the weighing sensor can be detected by the Wheatstone bridge, thereby determining the weight of the transport vehicle.

[0063] Among them, at least one strain gauge 420 can be set in each strain hole 411, and the number of strain gauges 420 in the strain hole 411 is related to the strain hole 411. For example, 1 to 3 strain gauges 420 can be set in the strain hole 411. The embodiment of the present application does not limit the number of strain gauges 420 in the strain hole 411.

[0064] Furthermore, the spacing structure 430 is opened at the bottom of the elastic body 410 , and the connection parts between the symmetrically arranged strain holes 411 are separated by the spacing structure 430 .

[0065] 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 weighing sensor. For example, if the measuring range of the weighing sensor is large, the elastic body 410 between the spacing structure 430 and the strain hole 411 is also relatively thick; if the measuring range of the weighing sensor is small, the elastic body 410 between the spacing structure 430 and the strain hole 411 is also relatively thin.

[0066] Specifically, the spacing structure 430 is arranged from bottom to top at the bottom of the elastic body 410, and the projection of the spacing structure 430 on the side of the elastic body 410 covers each strain hole 411 on the side of the elastic body 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.

[0067] See also Figure 4B , Figure 4C , Figure 4D , Figure 4E and Figure 4F , Figure 4B A structural diagram of another weighing sensor provided in an embodiment of the present application is shown in FIG. Figure 4C , Figure 4D , Figure 4E and Figure 4F They are respectively a front view, a side cross-sectional view, a top view and a top cross-sectional view of a weighing sensor provided in an embodiment of the present application.

[0068] like Figure 4C , Figure 4D , Figure 4E and Figure 4F As shown, the spacing structure 430 may include: a plurality of separation grooves 4301 , and a separation groove 4301 is arranged between each strain hole 411 and the strain hole 411 symmetrically located on the other side of the elastic body 410 .

[0069] Similarly, the bottom of the elastic body 410 may be provided with a plurality of separation grooves 4301 arranged from bottom to top and spaced apart along the length direction of the elastic body 410. The projection of each separation groove 4301 on the side of the elastic body 410 may cover the 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.

[0070] Accordingly, any two strain holes 411 symmetrically arranged on both sides of the elastic body 410 can be separated by the separation groove 4301, so that the strain holes 411 located on both sides of the elastic body 410 can withstand different pressures respectively, thereby obtaining pressure waveform signals when the vehicle passes the sensor respectively.

[0071] See also 4A to 4F The elastic body 410 is also provided with a strain groove 412, and the strain groove 412 is in a long strip shape.

[0072] The elastic body 410 can be divided into two parts, the upper part and the lower part, by the elongated strain groove 412. The upper part of the elongated strain groove 412 can be a load-bearing part, and multiple shear beam structures can be formed below the elongated strain groove 412. The multiple shear beam structures in the weighing sensor are connected as one.

[0073] Accordingly, in the height direction of the elastic body 410, the spacing structure 430 may penetrate the shear beam structure formed by each long strip strain groove 412. Similarly, when the spacing structure 430 includes a plurality of separation grooves 4301, each separation groove 4301 may also correspond to each shear beam structure one by one, and each separation groove 4301 may penetrate the corresponding shear beam structure.

[0074] It should be noted that, in practical applications, a plurality of elongated strain grooves 412 may be provided in the weighing sensor, and the elongated strain grooves 412 are arranged at intervals along the length direction of the elastic body 410 in the weighing sensor.

[0075] The two ends of the elastic body 410 can present different states in combination with the long strip strain grooves 412 .

[0076] See also Figure 3 In an optional embodiment, the ends of the elongated strain grooves at both ends of the elastic body 410 can be open, and the ends of the elongated strain grooves 412 located in the middle of the elastic body 410 can be closed, so that a support point is formed in the middle of two adjacent elongated strain grooves 412.

[0077] See also Figure 5A , Figure 5B and Figure 5C , Figure 5A A structural diagram of another weighing sensor provided in an embodiment of the present application, Figure 5B A structural diagram of another weighing unit provided in an embodiment of the present application, Figure 5C A top view of another weighing unit provided in an embodiment of the present application.

[0078] In another optional embodiment, the elongated strain grooves 412 may be located inside the elastic body 410 , and the ends of the elongated strain grooves 412 may be closed, so that support points are formed at both ends of the elongated strain grooves 412 .

[0079] Among them, Figure 5A , Figure 5B and Figure 5C The structure and principle of the weighing sensor shown are similar to those shown in Figure 3 and FIG. 4A to FIG. 4E The load cells shown are similar and will not be described again here.

[0080] Furthermore, during operation of the weighing sensor, by setting a spacing structure 430 between the strain holes 411 on both sides of the same shear beam structure, the strain holes 411 on both sides can be subjected to different elastic forces respectively, thereby forming two shear beam structures, so that different electrical signals can be generated through the Wheatstone bridges located on both sides of the elastic body 410 respectively, thereby determining the driving direction of the vehicle and improving the accuracy of detecting the weight of the transport vehicle.

[0081] 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, thereby forming a Wheatstone bridge.

[0082] In addition, the separation groove 4301 provided in the embodiment of the present application can be a rectangular groove, a circular groove, an elliptical groove, or a groove corresponding to other regular or irregular shapes, and the embodiment of the present application is not limited to this.

[0083] Similarly, each strain hole 411 provided on the elastic body 410 may be circular, rectangular, or other regular shapes, and the embodiment of the present application does not limit the shape of each strain hole 411 .

[0084] It should also be noted that, in actual applications, the weighing sensor can be obtained by mechanical processing or manual processing. The sizes of the strain hole 411, the elongated strain groove 412 and the spacing structure 430 in the weighing sensor can be set according to the precision of the mechanical equipment, or adjusted according to the precision of manual processing. The embodiment of the present application does not limit the sizes of each part.

[0085] Furthermore, in order to facilitate the measurement of the weight of the transport vehicle and improve the accuracy of the detection, the strain holes 411 provided on the elastic body 410 may be located at the same height, and along the vertical direction, the center of each strain hole 411 may be located at the midpoint between the long strip strain groove 412 and the bottom surface of the elastic body 410. 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 long strip strain groove 412 and the bottom surface of the elastic body 410. In addition, the position of the strain hole may also be set according to actual needs.

[0086] See also Figure 6 , Figure 6 A structural diagram of another weighing unit provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the weighing unit may further include: a supporting plate 440 .

[0087] The support plate 440 is located on the bottom surface of the elastic body 410 and connected to the elastic body 410. Specifically, a connection hole may be provided on the support plate 440, and a bolt for connecting the support plate 440 and the elastic body 410 may be provided at the connection hole.

[0088] By setting a support plate 440 under the elastomer 410, the process of installing the weighing sensor can be simplified. When installing the weighing sensor, there is no need to consider whether the shear beam structure of the elastomer 410 is in contact with the road. The weighing sensor only needs to be installed in a direction perpendicular to the plane of the road.

[0089] In summary, a weighing sensor provided in an embodiment of the present application separates the strain holes on both sides of the elastic body by setting a spacing structure in the elastic body of the weighing sensor. Therefore, when weighing a vehicle, the strain holes on both sides of the elastic body are subjected to different pressures, respectively, causing the strain holes and the strain gauges in the strain holes to produce different deformations, thereby generating different pressure waveforms in the Wheatstone bridge composed of each strain gauge. Combined with the dimensional parameters of the weighing sensor, the speed of the vehicle passing the sensor can be more accurately obtained. Finally, according to the different pressure waveforms, combined with the calculated vehicle speed, the weight of the vehicle can be accurately calculated, thereby improving the accuracy of measuring the vehicle weight.

[0090] Moreover, the driving direction of the vehicle can be determined by the positions of the various Wheatstone bridges of the weighing sensor in combination with the different pressure waveforms generated by different Wheatstone bridges, thereby improving the accuracy of measuring the vehicle weight.

[0091] Figure 7 is a schematic flow chart of a weighing method provided in an embodiment of the present application. As an example but not a limitation, the method can be applied to the above-mentioned weighing sensor, see Figure 7 , the method comprising:

[0092] Step 701: When a vehicle passes through a weighing sensor, two sets of pressure waveform data corresponding to the vehicle are obtained through the weighing sensor.

[0093] Step 702: Determine the instantaneous speed of the vehicle according to the two sets of pressure waveform data and the size parameters of the weighing sensor.

[0094] Step 703: Obtain the weight of the vehicle according to the instantaneous speed of the vehicle and multiple sets of pressure waveform data.

[0095] The weighing sensor can be arranged on the road, and the vehicle can pass through the road section where the weighing sensor is located when driving on the road. When the vehicle passes the weighing sensor, the strain hole in the weighing sensor is deformed under the action of the shear beam structure due to the influence of the vehicle's own weight.

[0096] Correspondingly, the strain gauge in the strain hole also deforms. The strain gauges in the weighing sensor can form a Wheatstone bridge. When the strain gauge is deformed, charges are generated in the strain gauge, causing the current and voltage to change in the Wheatstone bridge, generating waveform data.

[0097] Furthermore, when a vehicle passes through the weighing sensor, pressure can be applied to the strain holes on both sides of the weighing sensor in sequence, so that the strain holes on both sides of the weighing sensor are subjected to different pressures in sequence. Then the Wheatstone bridges on both sides of the weighing sensor can generate two different groups of pressures, such as Figure 2B Pressure waveform data shown.

[0098] Afterwards, the data processing platform connected to the weighing sensor can calculate the vehicle's direction and instantaneous speed based on the two sets of pressure waveform data detected and the preset width of the weighing sensor.

[0099] For example, the data processing platform can calculate the vehicle's speed based on the time difference between the two moments with the maximum pressure values ​​in the two sets of pressure waveform data. Moreover, based on the two moments with the maximum pressure values, combined with the Wheatstone bridges on both sides of the weighing sensor, it can be determined which side of the weighing sensor the vehicle passes first and which side of the weighing sensor the vehicle passes later, thereby determining the vehicle's direction of travel.

[0100] Finally, the data processing platform can integrate the two sets of pressure waveforms according to the collected data, and then calculate the weight of the vehicle based on the instantaneous speed of the vehicle detected to complete the weighing measurement of the vehicle.

[0101] To summarize, a weighing method provided in an embodiment of the present application collects two sets of pressure waveform data of a vehicle through a weighing sensor, and then calculates the instantaneous speed of the vehicle in combination with the pre-set dimensional parameters of the weighing sensor. Finally, the weight of the vehicle is calculated based on the two sets of pressure waveform data in combination with the instantaneous speed of the vehicle to complete the weighing measurement of the vehicle, which can improve the accuracy of measuring the vehicle weight.

[0102] Moreover, by collecting the two sets of pressure waveform data and combining the positions of the Wheatstone bridges in the weighing sensor, the Wheatstone bridges that the vehicle passes through can be determined, thereby determining the vehicle's driving direction, which can improve the accuracy of measuring the vehicle's weight.

[0103] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0104] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0105] In the embodiments provided in the present application, it should be understood that the disclosed devices / equipment and methods can be implemented in other ways. For example, the device / equipment embodiments described above are merely schematic, for example, the division of the modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0106] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0107] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0108] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0109] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0110] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A weighing sensor, characterized in that: The weighing sensor comprises: an elastic body, a strain gauge and a spacing structure; A plurality of strain holes are symmetrically arranged on both side surfaces of the elastic body, strain gauges are arranged in the strain holes, and the strain gauges in two adjacent strain holes on the same side form a Wheatstone bridge; The spacing structure is opened at the bottom of the elastic body, and the connection parts between the symmetrically arranged strain holes are separated by the spacing structure; the spacing structure is arranged at the bottom of the elastic body from bottom to top, and the projection of the spacing structure on the side of the elastic body covers each strain hole on the side of the elastic body; The elastic body is provided with a plurality of long strip strain grooves at intervals along the length direction, and the elastic body is divided into an upper and a lower part by the long strip strain grooves, the upper part is a load-bearing part, and the lower part is a plurality of shear beam structures, and the plurality of shear beam structures are connected as one body; In the height direction of the elastic body, the spacing structure penetrates the shear beam structure; During operation, the weighing sensor sets a spacing structure between the strain holes on both sides of the same shear beam structure, so that the strain holes on both sides are subjected to different elastic forces respectively, forming two shear beam structures, so that different electrical signals can be generated through the Wheatstone bridges located on both sides of the elastic body, thereby determining the driving direction of the vehicle and improving the accuracy of detecting the weight of the transport vehicle.

2. The weighing sensor according to claim 1, characterized in that: The spacing structure includes a plurality of separation grooves, and one separation groove is arranged between each of the strain holes and a symmetrical strain hole on the other side of the elastic body.

3. The weighing sensor according to claim 2, characterized in that: The separation groove is a rectangular groove, and the projection of the separation groove in the width direction of the elastic body covers the strain hole.

4. The weighing sensor according to claim 1, characterized in that: The ends of the elongated strain grooves at both ends of the elastic body are open, and the ends of the elongated strain grooves at the middle position of the elastic body are closed, so that a support point is formed in the middle position of two adjacent elongated strain grooves.

5. The weighing sensor according to claim 1, characterized in that: The long strip strain grooves are all located inside the elastic body, and the ends of the long strip strain grooves are closed, so that support points are formed at both ends of the long strip strain grooves.

6. The weighing sensor according to any one of claims 1 to 5, characterized in that: The weighing sensor further comprises: a support plate; The support plate is located on the bottom surface of the elastic body and is fixedly connected to the elastic body.

7. The weighing sensor according to any one of claims 1 to 5, characterized in that: One to three strain gauges are arranged in each of the strain holes.

8. A weighing system, characterized in that: The weighing system comprises: a data processing platform and a weighing sensor as claimed in any one of claims 1 to 7; The weighing sensor is arranged in the road and is used to obtain a weighing signal related to the weight of the vehicle when the vehicle passes through the road; The data processing platform is used to obtain the weight corresponding to the vehicle according to the weighing signal.

9. A weighing method, characterized in that: Applied to the weighing sensor according to any one of claims 1 to 7, the method comprises: When a vehicle passes through the weighing sensor, two sets of pressure waveform data corresponding to when the vehicle enters and leaves are obtained through the weighing sensor; Determine the instantaneous speed of the vehicle when passing the weighing sensor according to the two sets of pressure waveform data and the size parameters of the weighing sensor; The weight of the vehicle is obtained according to the instantaneous speed of the vehicle and the two sets of pressure waveform data.

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