A deformation weighing device

Abstract

The utility model relates to the technical field of vehicle-mounted weighing, in particular to a deformation weighing device, which is installed on an automobile axle and comprises: a base, which is installed on the automobile axle and located at a position with the largest deformation of the axle; and an induction substrate, which is arranged along the axial direction of the axle and installed on the axle through the two bases. When the automobile is loaded, the axle deforms due to the increase of the vehicle weight, causing the deformation of the induction substrate. In the utility model, the base is installed at the region with the largest deformation of the axle, which can more sensitively perceive the deformation of the axle. The induction substrate adopts a strain gauge, which produces bending deformation along with the deformation of the axle, and the resistance value changes proportionally. The Wheatstone bridge converts the voltage signal into a linear relationship with the weight, and the signal conditioning circuit processes the output readable weight value. The utility model can detect slight deformation and realize the accurate measurement of slight weight change.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted weighing technology, and in particular to a deformation weighing device. Background Technology

[0002] In today's era of rapid economic development, the transportation industry, as a key link connecting production and consumption, is undeniably important. With the continuous increase in logistics demand and the ongoing expansion of transportation scale, the transportation industry's requirements for refined, efficient, and safe transportation management have reached unprecedented levels.

[0003] Overloading is a long-standing and serious problem in the transportation sector. Large trucks, as the mainstay of freight transport, are particularly prone to overloading. Overloading not only severely damages infrastructure such as highways and bridges, shortening their lifespan and increasing maintenance costs, but also significantly increases the probability of traffic accidents, posing a huge threat to people's lives and property. Therefore, accurately and promptly obtaining vehicle load information and achieving effective monitoring and management of vehicle loads has become an urgent need to ensure transportation safety, maintain road facilities, and promote the healthy development of the transportation industry.

[0004] Currently, fixed-point weighing is a relatively traditional method for vehicle load detection. However, this method has many drawbacks in practical applications. On the one hand, during peak logistics periods, weigh stations are often overcrowded, and trucks have to wait in long queues to be weighed. This not only wastes a lot of time and reduces transportation efficiency, but may also lead to delays in goods delivery, affecting the normal operation of enterprises. On the other hand, when a vehicle is found to be overloaded during weighing, the driver has to return to the original location to unload the cargo, a process that is not only cumbersome but also consumes additional time and labor costs. More importantly, fixed-point weighing can only obtain the load information of a vehicle at a specific location and cannot achieve real-time monitoring of the weight of the cargo carried on the vehicle during its journey. This means that if the load changes due to cargo shifting or leakage during the vehicle's journey, management personnel cannot be notified in time, thereby increasing safety hazards during transportation.

[0005] Therefore, this application develops a deformation weighing device to solve the problems existing in the prior art. Utility Model Content

[0006] The purpose of this invention is to provide a deformation weighing device to solve the problem of low measurement accuracy in the prior art.

[0007] The technical solution of this utility model is: a deformation weighing device, installed on an automobile axle, comprising:

[0008] The base is installed on the vehicle axle and is located at the position where the axle deformation is greatest;

[0009] The sensing substrate is arranged along the axial direction of the axle and mounted on the axle via two bases. When the vehicle is loaded with cargo, the axle deforms due to the increased weight of the vehicle, causing the sensing substrate to deform as well.

[0010] Preferably, the base is fixed to the axle by welding.

[0011] Preferably, the sensing substrate has a first surface and a second surface opposite to each other, the first surface and the second surface are respectively provided with symmetrical first grooves, the first surface is also provided with a second groove, and the first groove of the first surface is connected to the second groove.

[0012] Preferably, the first groove and the second groove have different depths, forming deformation regions with different thicknesses, and the first groove and the second groove are arranged along the length of the sensing substrate.

[0013] Preferably, a pair of third grooves are symmetrically provided in the first groove, and the third grooves are arrayed along the width direction of the sensing substrate.

[0014] Preferably, both the first and second surfaces are provided with cover plates, the shape of which matches the deformation area, so that the cover plates seal the deformation area.

[0015] Preferably, there are two sensing substrates, which are symmetrical about the center line perpendicular to the axle.

[0016] Preferably, the sensing substrate is provided with a protective shell, and a slot is provided through one side of the protective shell. The sensing substrate is provided with a mounting hole communicating with the second groove on the side adjacent to the slot. Fasteners pass through the slot and the mounting hole so that the protective shell is installed and covers the sensing substrate.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] (1) The base is installed in the area where the axle deformation is the largest, which can more sensitively sense the axle deformation. The sensing substrate uses a strain gauge, which bends with the axle deformation. The resistance value changes proportionally with the deformation. It is converted into a voltage signal that is linearly related to the weight through a Wheatstone bridge. After being processed by the signal conditioning circuit, a readable weight value is output. It can detect small deformations and realize accurate measurement of small weight changes.

[0019] (2) The first grooves on the first and second surfaces of the sensing substrate are symmetrically distributed, so that the force is uniform when the sensing substrate is deformed, improving the measurement accuracy and stability, reducing the measurement error caused by structural asymmetry. Two devices are set on the axle, and the two sensing substrates are symmetrically distributed perpendicular to the center line of the axle. When the vehicle load is uneven, the deformation of different parts of the axle can be captured separately, and more accurate load data can be obtained through comprehensive analysis.

[0020] (3) The first groove and the second groove have different depths, forming deformation areas with different thicknesses. Different thickness areas have different strains when subjected to force, which can more accurately capture the deformation of the axle caused by the change of vehicle load weight. In addition, there are two third grooves arranged in an array along the width direction in the first groove, which allows the sensing substrate to more finely perceive the difference in the width direction of the axle deformation, further improving the measurement accuracy. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of the structure of the sensing substrate and the base described in this utility model;

[0023] Figure 2 This is a side view of the assembly of the sensing substrate and the base described in this utility model;

[0024] Figure 3 This is an exploded view of the deformation weighing device described in this utility model;

[0025] Figure 4 This is a top view of the sensing substrate described in this utility model;

[0026] Figure 5 This is a schematic diagram showing the position of the weighing device described in this utility model on the axle.

[0027] Wherein: 1. Base; 2. Sensor substrate; 21. First surface; 22. Second surface; 23. Deformation area; 231. First groove; 232. Second groove; 24. Third groove; 3. Cover plate; 4. Protective shell; 41. Groove; 42. Mounting hole. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to specific embodiments:

[0029] like Figures 1-3As shown, a deformation weighing device is installed on a vehicle axle for real-time monitoring of vehicle load. The device includes a base 1 and a sensing substrate 2. The base 1 is installed on the vehicle axle at the area of ​​greatest axle deformation. When the axle bears the weight of the vehicle, the degree of deformation varies at different locations. By selecting the location of greatest deformation to install the base 1, the deformation of the axle can be more sensitively detected, thus providing a basis for accurate weighing via the sensing substrate 2. The sensing substrate 2 is arranged along the axial direction of the axle and is installed on the axle via two bases 1. Specifically, the sensing substrate 2 is a strain gauge. Both ends of the sensing substrate 2 are connected to the two bases 1 by bolts to ensure that it can be stably fixed on the axle and deform accordingly with the deformation of the axle. When the axle is deformed by the weight of the vehicle, the constraint forces on the two ends of the sensing substrate 2 are different, resulting in bending deformation and causing a proportional change in its resistance value. The change in resistance is converted into a voltage signal that is linearly related to the weight through a Wheatstone bridge. After being processed by the signal conditioning circuit (such as amplification, filtering, and analog-to-digital conversion), the final output is a readable weight value, which can indirectly obtain the vehicle's load information. Furthermore, the strain gauge can detect minute deformations. When the vehicle load changes, the strain gauge will deform, causing its resistance value to change, thereby realizing the measurement of minute weight changes.

[0030] Specifically, the base 1 is fixed to the axle by welding. Welding can form a firm connection between the base 1 and the axle, ensuring that the base 1 is tightly fixed to the axle and will not loosen or shift due to vibration, bumps or other factors during vehicle operation. Thus, when the axle deforms under the weight of the vehicle, it can ensure good mechanical transmission performance between the base 1 and the axle, so that the deformation of the axle can be accurately transmitted to the base 1 and then to the sensing substrate 2, so that the sensing substrate 2 can accurately sense the deformation of the axle.

[0031] In this embodiment, as Figure 2 As shown, the sensing substrate 2 has a first surface 21 and a second surface 22 facing each other. A first groove 231 is formed on both the first surface 21 and the second surface 22 of the sensing substrate 2, and the first grooves 231 on these two surfaces are symmetrically distributed. This makes the stress distribution more uniform when the sensing substrate 2 deforms, improving the accuracy and stability of the measurement. It ensures that the stress distribution on both sides is relatively balanced when the axle deforms, reducing measurement errors caused by structural asymmetry. A second groove 232 is also provided on the first surface 21 of the sensing substrate 2, and the first groove 231 and the second groove 232 on the first surface 21 are interconnected. During the measurement process, a specific stress concentration area or strain change area will form at the groove connection point, thus more sensitively reflecting the deformation of the axle and more accurately measuring the vehicle load weight.

[0032] Furthermore, such as Figures 2-4 As shown, the first groove 231 and the second groove 232 have different depths, forming deformation regions 23 of varying thickness. When the sensing substrate 2 is subjected to force and deforms, these regions will produce different degrees of strain. The thinner regions are more prone to deformation and exhibit more significant strain under the same force, while the thicker regions show relatively smaller deformation and weaker strain. This differentiated deformation characteristic can more accurately capture the deformation of the axle caused by changes in vehicle load weight. In addition, both the first groove 231 and the second groove 232 are arranged along the length of the sensing substrate 2, allowing the grooves to cover the sensing substrate. The main stress area of ​​the axle is the groove along the length direction. When the axle deformation causes the sensing substrate 2 to deform, the groove can more comprehensively sense the deformation process, ensuring that the measurement results can accurately reflect the stress of the entire axle. At the same time, two third grooves 24 are arrayed along the width direction in the first groove 231. Through the third grooves 24, the sensing substrate 2 can more finely sense the difference in the width direction of the axle deformation, and thus more accurately measure the vehicle weight. Through the multi-layered groove structure design, the deformation weighing device can still maintain high measurement accuracy when facing complex stress conditions.

[0033] like Figure 3 As shown, cover plates 3 are respectively installed on the first surface 21 and the second surface 22 of the sensing substrate 2. The two cover plates 3 cover the deformation area 23 on their respective surfaces to ensure that the deformation area 23 is fully protected.

[0034] In practical applications, such as Figure 5 As shown, two of these devices are installed on the axle, with two sensing substrates 2 symmetrically distributed perpendicular to the center line of the axle. When the vehicle load is uneven, the symmetrically arranged sensing substrates 2 can capture the deformation of different parts of the axle, and obtain more accurate load data after comprehensive analysis.

[0035] Furthermore, a protective shell 4 is provided on the outside of the sensing substrate 2. Its main function is to protect the sensing substrate 2 from interference and damage from the external environment during vehicle operation. A slot 41 is provided through one side of the protective shell 4. An installation hole 42 is provided on the side of the sensing substrate 2 adjacent to the slot 41 of the protective shell 4. The installation hole 42 is connected to the second groove 232 of the first surface 21 of the sensing substrate 2. During installation, the protective shell 4 is aligned with the sensing substrate 2 so that the slot 41 corresponds to the installation hole 42 on the sensing substrate 2. Fasteners (such as bolts, screws, etc.) are passed through the slot 41 of the protective shell 4 and the installation hole 42 of the sensing substrate 2. By tightening the fasteners, the protective shell 4 is firmly installed and covered on the sensing substrate 2, thereby ensuring the stability of the protective shell 4.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A deformation weighing device, installed on an automobile axle, characterized in that, include: The base (1) is installed on the automobile axle and is located at the position where the axle deformation is the greatest; The sensing substrate (2) is arranged along the axial direction of the axle and is mounted on the axle by two bases (1). When the car is loaded, the axle deforms due to the increased weight of the vehicle, causing the sensing substrate (2) to deform.

2. The deformation weighing device according to claim 1, characterized in that: The base (1) is fixed to the axle by welding.

3. The deformation weighing device according to claim 1, characterized in that: The sensing substrate (2) has a first surface (21) and a second surface (22) opposite to each other. The first surface (21) and the second surface (22) are respectively provided with symmetrical first grooves (231). The first surface (21) is also provided with a second groove (232), and the first groove (231) of the first surface (21) is connected to the second groove (232).

4. The deformation weighing device according to claim 3, characterized in that: The first groove (231) and the second groove (232) have different depths, forming a deformation region (23) with different thicknesses, and the first groove (231) and the second groove (232) are arranged along the length of the sensing substrate (2).

5. A deformation weighing device according to claim 4, characterized in that: A pair of third grooves (24) are symmetrically arranged in the first groove (231), and the third grooves (24) are arranged in an array along the width direction of the sensing substrate (2).

6. A deformation weighing device according to claim 4, characterized in that: Both the first surface (21) and the second surface (22) are provided with cover plates (3), the shape of which matches the deformation area (23) so that the cover plates (3) seal the deformation area (23).

7. A deformation weighing device according to claim 1, characterized in that: The induction substrate (2) has two parts, which are symmetrical about the center line perpendicular to the axle.

8. A deformation weighing device according to claim 3, characterized in that: The sensing substrate (2) is provided with a protective shell (4). A slot (41) is provided on one side of the protective shell (4). The sensing substrate (2) is provided with a mounting hole (42) that communicates with the second groove (232) on the side adjacent to the slot (41). Fasteners pass through the slot (41) and the mounting hole (42) so that the protective shell (4) is installed and covers the sensing substrate (2).

Images