阅读说明：本技术 一种基于中介物应变测量的半挂车车载称重装置 (Semitrailer vehicle-mounted weighing device based on intermediary strain measurement ) 是由 付宏勋 乔欢波 黄昊 张宇 赵豪杰 汪建锋 于 2021-09-08 设计创作，主要内容包括：本发明提供了一种基于中介物应变测量的半挂车车载称重装置,包括：数据采集模块、数据传输模块、数据处理模块、数据显示模块、警示模块、供电模块。所述数据采集模块由上夹具、测量装置和下夹具组成。当车辆载重发生变化时,钢板弹簧的垂向下沉量会改变,安装在车架和板簧之间数据采集模块中的测量装置,可以将板簧垂向下沉量的改变转换为中介物应变值的改变,然后通过数据处理模块得出车辆具体载重数值,最终显示在驾驶室内的数据显示模块上,警示模块通过发出提示音及灯光来提醒司机车辆是否超载或偏载。本发明提供的车载称重装置能够实现实时测量车辆载重量,提高了车辆载重的检测效率,并且相比传统称重装置,成本低、精度高、安装维护方便。(The invention provides a semitrailer vehicle-mounted weighing device based on intermediary strain measurement, which comprises: the device comprises a data acquisition module, a data transmission module, a data processing module, a data display module, a warning module and a power supply module. The data acquisition module consists of an upper clamp, a measuring device and a lower clamp. When the vehicle load changes, leaf spring's vertical deflection can change, installs the measuring device in the data acquisition module between frame and leaf spring, can convert the change of leaf spring vertical deflection into the change of intermediary's strain value, then obtains the concrete load numerical value of vehicle through data processing module, finally shows on the data display module in the driver's cabin, and warning module reminds driver's vehicle whether overload or unbalance loading through sending prompt tone and light. The vehicle-mounted weighing device provided by the invention can realize real-time measurement of the vehicle load capacity, improves the detection efficiency of the vehicle load capacity, and has the advantages of low cost, high precision and convenience in installation and maintenance compared with the traditional weighing device.)

1. The utility model provides an on-vehicle weighing device of semitrailer based on intermediary thing strain measurement which characterized in that, the weighing device includes: the device comprises six components, namely a data acquisition module, a data transmission module, a data processing module, a data display module, a warning module and a power supply module.

2. The semi-trailer vehicle-mounted weighing device according to claim 1, wherein the data acquisition module and the data transmission module perform data transmission in a wired transmission manner, and the conversion between an analog signal and a digital signal is realized through a signal conversion element; the data processing module receives data in the data acquisition module through the CAN bus transmission system, reads data measured by a strain sensor in the data acquisition module, and calculates to obtain a load value of the semitrailer; the data display module is used for displaying the vehicle load value and the warning information; the warning module comprises a vehicle-mounted horn and a warning lamp, and when the vehicle is overloaded or unbalanced, the warning module sends out a warning sound through the vehicle-mounted horn and the warning lamp flickers light to remind a driver; the power supply module provides stable voltage for six modules of the weighing device through wired connection.

3. The semi-trailer vehicle-mounted weighing device according to claim 1, characterized in that the data acquisition module consists of an upper clamp, a lower clamp and a measuring device, the number of the data acquisition modules is the same as that of the semi-trailer steel plate springs, and the data acquisition modules can be adapted to any type of semi-trailer.

4. The data acquisition module according to claim 3, wherein the upper clamp is composed of an upper clamp clamping plate, an upper clamp fixing guide rail, an upper clamp ball sliding block, an upper clamp bolt and a ball, the lower clamp is composed of a lower clamp bolt, a lower clamp limit baffle, a lower clamp sliding block and a lower clamp base, and the measuring device is composed of an intermediary, a strain sensor, a large spiral spring sleeve, a small spiral spring sleeve and a spiral spring.

5. The data acquisition module as claimed in claim 3, wherein the upper clamp clamps the I-steel of the vehicle frame directly above the central point of the plate spring through an upper clamp clamping plate, an upper clamp fixing guide rail and an upper clamp bolt, the ball track is formed in the ball block of the upper clamp, the semicircular groove is formed in the upper clamp fixing guide rail, the upper clamp block can be assembled on the upper clamp fixing guide rail by placing the ball in the groove, and the upper clamp block can move freely along the groove direction. The balls may be replaced by rolling bodies having the same function.

6. The data acquisition module of claim 3, wherein the lower clamp is mounted at the center of the leaf spring, grooves are formed on two sides of the lower clamp base, the lower clamp sliding block is matched with the corresponding convex teeth, and the lower clamp sliding block can be mounted on the lower clamp base to move freely along the groove direction; the lower clamp limiting baffle is fixed on the lower clamp base through a bolt, so that the limiting effect is achieved, and the lower clamp sliding block can be prevented from falling off; and the lower clamp adjusting bolt is used for adjusting the lower clamp sliding block to freely move along the groove direction, so that the lower clamp can clamp the steel plate spring.

7. The data acquisition module of claim 3, wherein the measuring device is positioned between an upper fixture and a lower fixture, the upper part of the intermediary is welded to the bottom of the ball slide of the upper fixture, and the lower part of the intermediary is welded to the top of the large helical spring sleeve; the strain sensor is installed on the lateral surface of the intermediary object, the spiral spring is located inside the small spiral spring sleeve, the large spiral spring sleeve is sleeved on the small spiral spring sleeve, and the small spiral spring sleeve is welded on the lower clamp base.

8. A measuring device according to claim 7, wherein the interposer is I-shaped or S-shaped, the I-shaped interposer mounting the strain sensor at a side and the S-shaped interposer mounting the strain sensor at a central transverse surface.

9. The semitrailer weighing device of claims 5-8, wherein the data acquisition module is installed between a semitrailer frame rail and a leaf spring, the vertical sinking amount of the leaf spring changes when a vehicle is loaded, a lower clamp installed on a leaf spring drives a small spiral spring sleeve to move upwards, the small spiral spring sleeve extrudes the spiral spring, the spiral spring is stressed and compressed and transmits force to an intermediary object welded on a large spiral spring sleeve, a corresponding strain value can be measured through a strain sensor, and then the change of the vertical distance of the leaf spring is converted into the change of the strain value.

Technical Field

The invention relates to the field of automobile weighing systems, in particular to a semitrailer vehicle-mounted weighing device based on intermediary strain measurement.

Background

In recent years, with the rapid development of the Chinese traffic network, highway transportation becomes a great driving force for the development of Chinese economy. The transportation mobility and the convenience of the semitrailer are high, so that the highway transportation is rapidly developed. However, in the transportation process, the overload phenomenon of the semitrailer is frequent, the overload of the vehicle is over-limit, and the highway infrastructure is seriously damaged, and meanwhile, the overload of the semitrailer easily causes the spring steel plate to be broken off or the elasticity of the spring steel plate to be reduced, the rivet to be loosened and broken off, even the relative position of the assembly is changed, the clutch and the gearbox are damaged, the braking efficiency is suddenly lost, the direction is out of control, and other mechanical accidents.

Traditional mode of weighing relies on the weighbridge fixed point to weigh, and cargo vehicle need drive specific position, measures under quiescent condition, consumes time for a long time, and work efficiency is low, can not satisfy the demand of modernized transportation trade already. To current problem of weighing, on-vehicle weighing system is proposed, has solved the inconvenient problem of traditional weighing-appliance weighing, but current on-vehicle weighing system's measurement accuracy is lower, with high costs to do not consider the convenience of equipment fixing, maintenance.

Disclosure of Invention

In order to solve the problems of the prior art, the invention designs the semi-trailer vehicle-mounted weighing device based on intermediary strain measurement, which not only improves the weighing efficiency of the vehicle, but also designs a special clamp and a special measuring device aiming at the bearing structure of the semi-trailer in consideration of the installation and maintenance of the device, thereby improving the installation and maintenance convenience of the vehicle-mounted weighing device and the precision of measuring the load.

The invention solves the problems through the following technical scheme:

the utility model provides an on-vehicle weighing device of semitrailer based on intermediary thing strain measurement which characterized in that, the weighing device includes: the device comprises six components, namely a data acquisition module, a data transmission module, a data processing module, a data display module, a warning module and a power supply module.

The data acquisition module and the data transmission module perform data transmission in a wired transmission mode, and the conversion between an analog signal and a digital signal is realized through a signal conversion element; the data processing module receives data in the data acquisition module through the CAN bus transmission system, reads data measured by a strain sensor in the data acquisition module, and calculates to obtain a load value of the semitrailer; the data display module is used for displaying the vehicle load value and the warning information; the warning module comprises a vehicle-mounted horn and a warning lamp, and when the vehicle is overloaded or unbalanced, the warning module sends out a warning sound through the vehicle-mounted horn and the warning lamp flickers light to remind a driver; the power supply module provides stable voltage for six modules of the weighing device through wired connection.

The data acquisition module comprises upper clamp, lower clamp and measuring device, and the quantity of data acquisition module is the same with semitrailer leaf spring's quantity, can adapt to any type's semitrailer.

The upper clamp comprises an upper clamp clamping plate, an upper clamp fixing guide rail, an upper clamp ball sliding block, an upper clamp bolt and a ball, the lower clamp comprises a lower clamp bolt, a lower clamp limiting baffle, a lower clamp sliding block and a lower clamp base, and the measuring device comprises an intermediary, a strain sensor, a large spiral spring sleeve, a small spiral spring sleeve and a spiral spring.

The upper clamp is used for clamping the frame I-steel right above the central point of the plate spring through the upper clamp clamping plate, the upper clamp fixing slide rail and the upper clamp bolt, the roller path is formed in the ball sliding block of the upper clamp, the semicircular groove is formed in the upper clamp fixing guide rail, the ball is placed in the roller path, the upper clamp sliding block can be assembled on the upper clamp fixing guide rail, the upper clamp sliding block can freely move along the groove direction, and the ball can be replaced by the rolling body with the same effect.

The lower clamp is arranged at the central position of the steel plate spring, grooves are formed in two sides of the lower clamp base, the lower clamp sliding block is matched with the corresponding convex teeth, the lower clamp sliding block can be arranged on the lower clamp base to move freely along the groove direction, the lower clamp limiting baffle is fixed on the lower clamp base through bolts, the limiting effect is achieved, the lower clamp sliding block can be prevented from falling off, the lower clamp adjusting bolt is used for adjusting the lower clamp sliding block to move freely along the groove direction, and the lower clamp can clamp the steel plate spring.

The measuring device is located between the upper clamp and the lower clamp, the upper portion of the intermediary is welded to the bottom of the ball sliding block of the upper clamp, the lower portion of the intermediary is welded to the top of the large spiral spring sleeve, the strain sensor is installed on the lateral surface of the intermediary, the spiral spring is located inside the small spiral spring sleeve, the large spiral spring sleeve is sleeved on the small spiral spring sleeve, and the small spiral spring sleeve is welded to the lower clamp base.

The shape of the intermediate is I-shaped or S-shaped, the strain sensor is arranged on the side face of the I-shaped intermediate, and the strain sensor is arranged on the transverse surface in the middle of the S-shaped intermediate.

The data acquisition module is installed between semitrailer frame longeron and leaf spring, and leaf spring's vertical deflection can change when the vehicle is loaded, and the lower anchor clamps of installing on the leaf spring drive little helical spring sleeve rebound, and little helical spring sleeve extrusion helical spring, the helical spring atress compression to transmit the intermediary thing of welding on big helical spring sleeve with power, can measure corresponding dependent variable number through strain transducer, and then change the change of the vertical distance of leaf spring is the change of dependent variable.

The invention has the following beneficial effects:

1. compared with other sensors, the pressure sensor has high precision and small error, ensures the accuracy of measurement, and can weigh at any time and any place in the running process of the vehicle.

2. The invention designs a special clamp aiming at the bearing structure of the semitrailer, and improves the convenience of installation and maintenance of the device.

3. The upper clamp is provided with a sliding rail with a ball or a roller, so that the influence of longitudinal movement on the vertical compression deformation of the spiral spring when the plate spring is loaded can be eliminated.

4. The vehicle-mounted weighing system provided by the invention does not change the bearing structure of the vehicle, and the safety of the vehicle is ensured.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a semi-trailer vehicle-mounted weighing device;

FIG. 2 is a schematic view of the installation position of the semi-trailer vehicle-mounted weighing device;

FIG. 3 is a schematic structural diagram of a semi-trailer vehicle-mounted weighing device;

FIG. 4 is a schematic view of the structure of the upper clamp;

FIG. 5 is a schematic structural view of one embodiment of an upper clamp ball slide;

FIG. 6 is a schematic view of the structure of the lower clamp;

FIG. 7 is a schematic view of the structure of the measuring device;

FIG. 8 is a schematic diagram of an S-shaped interposer structure.

Detailed Description

The present invention will be further described with reference to the following examples, but the present invention is not limited to these examples.

The invention provides a semitrailer vehicle-mounted weighing device based on intermediary strain measurement, as shown in figure 1, the semitrailer vehicle-mounted weighing device comprises: the device comprises six components, namely a data acquisition module, a data transmission module, a data processing module, a data display module, a warning module and a power supply module. The data acquisition module and the data transmission module perform data transmission in a wired transmission mode, and the conversion between an analog signal and a digital signal is realized through a signal conversion element; the data processing module receives data in the data acquisition module through the CAN bus transmission system, reads data measured by a strain sensor in the data acquisition module, and calculates to obtain a load value of the semitrailer; the data display module is used for displaying the vehicle load value and the warning information; the warning module comprises a vehicle-mounted horn and a warning lamp, and when the vehicle is overloaded or unbalanced, the warning module sends out a warning sound through the vehicle-mounted horn and the warning lamp flickers light to remind a driver; the power supply module provides stable voltage for six modules of the weighing device through wired connection.

The data acquisition module is a core module of the vehicle-mounted weighing device, as shown in fig. 2, the data acquisition module is composed of an upper clamp 1, a measuring device 2 and a lower clamp 3, the whole module is installed between a longitudinal beam 4 and a steel plate spring 5 of a semi-trailer frame, and the measurement of the vehicle load is realized by converting the vertical deformation of the steel plate spring 5 after the vehicle load is carried into the strain.

As shown in fig. 3, the upper clamp is composed of an upper clamp bolt 101, an upper clamp clamping plate 102, an upper clamp fixing guide rail 103, an upper clamp ball slider 104 and balls 105, the measuring device is composed of an intermediary 201, a strain sensor 202, a large helical spring sleeve 203, a small helical spring sleeve 204 and a helical spring 205, and the lower clamp is composed of a lower clamp bolt 301, a lower clamp limit baffle 302, a lower clamp slider 303 and a lower clamp base 304.

As shown in fig. 4, the upper clamp 1 clamps the i-steel 4 of the vehicle frame directly above the central point of the plate spring 5 through an upper clamp bolt 101, an upper clamp clamping plate 102 and an upper clamp fixing slide rail 103, the inner part of the upper clamp ball slide block 104 is provided with a raceway, the upper clamp fixing guide rail 103 is provided with a semicircular groove, the upper clamp slide block 104 can be assembled on the upper clamp fixing guide rail 103 by placing a ball 105 in the raceway, the upper clamp slide block 104 can move freely along the groove direction, and the ball 105 can be replaced by a rolling body with the same function.

Fig. 5 shows another embodiment of the upper clamp slider, specifically, a plurality of circular raceways are formed on the upper clamp ball slider 104, and rolling elements such as balls are placed in the raceways.

As shown in fig. 6, the lower clamp 2 is installed at the central position of the leaf spring 5, grooves are formed on two sides of the lower clamp base 304, the lower clamp slider 303 is matched with a corresponding convex tooth, the lower clamp slider 303 can be installed on the lower clamp base 304 to move freely along the groove direction, the lower clamp limit baffle 302 is fixed on the lower clamp base 304 through a bolt to limit the position of the lower clamp slider 303, the lower clamp slider 303 can be prevented from falling off, and the lower clamp adjusting bolt 301 is used for adjusting the lower clamp slider 303 to move freely along the groove direction to clamp the leaf spring 5 through the lower clamp 3.

As shown in fig. 7, the upper part of the intermediary 2 is welded at the bottom of the upper clamp ball sliding block 104, the lower part of the intermediary 2 is welded at the top of the large spiral spring sleeve 203, the strain sensor 202 is installed on the lateral surface of the intermediary 2, the radius of the spiral spring 205 is slightly smaller than that of the small spiral spring sleeve 204, the radius of the small spiral spring sleeve 204 is slightly smaller than that of the large spiral sleeve 203, the spiral spring 205 is located inside the small spiral spring sleeve 204, the large spiral spring sleeve 203 is sleeved on the small spiral spring sleeve 204, the small spiral spring sleeve 204 is welded on the lower clamp base 304, when the vehicle loaded plate spring 5 is vertically deformed, the lower clamp 3 installed on the plate spring 5 drives the small spiral spring sleeve 204 to move upwards, the small spiral spring sleeve 204 presses the spiral spring 205, the spiral spring 205 is compressed by force and transmits the force to the intermediary 201 welded on the large spiral spring sleeve 203, so that the strain sensor 201 can measure a corresponding strain value. The specific measurement process is as follows:

according to the relationship between stress and strain: sigma ═ E epsilon (1)

Wherein E is the elastic modulus and has the unit of Mpa; sigma is stress, and the unit is Mpa; ε is the strain.

Internal forces to which the intermediary is subjected: f ═ σ S ═ ES epsilon (2)

Wherein S is the cross-sectional area of the mediator in m²。

The force to which the spring is subjected: f₁＝K₁·Δx₁ (3)

In the formula, K₁Is the stiffness coefficient of the spring and has the unit of N/m; Δ x₁Is the amount of deflection of the spring in m.

Force to which the leaf spring is subjected: f₂＝K₂·Δx₂ (4)

In the formula, K₂The rigidity of the steel plate spring is N/m; Δ x₂Is the amount of deflection of the spring in m.

After the material of the meson is selected, the elastic modulus E is a fixed value, and the linear relation between stress and strain can be obtained by the formula (1); when the sectional area S of the mediator is fixed, the formula (2) shows that the internal force F borne by the mediator is in linear relation with the strain epsilon; as can be seen from equation (3), in the case of springsWith a constant stiffness coefficient, the spring is stressed by F₁Amount of deformation Δ x of spring₁A linear relationship; as can be seen from the formula (4), when the stiffness of the leaf spring is constant, the stress F of the spring is constant₂Amount of deformation Δ x of spring₂A linear relationship; when the vehicle is loaded, the load capacity can be obtained according to the formula (4) by measuring the deformation of the steel plate spring. Because the deflection of leaf spring is difficult for measuring, so realize weighing to whole car through data acquisition module. When the vehicle is loaded with goods, the steel plate spring 5 is vertically deformed, so that the lower clamp 3 arranged on the steel plate spring 5 drives the small spiral spring sleeve 204 to move upwards, the small spiral spring sleeve 204 extrudes the spiral spring 205, and the force F borne by the steel plate spring is realized₂Transmitted to the coil spring 205, the coil spring 205 is compressed by force, and the force F borne by the coil spring 205 is transmitted to the coil spring₁The force is transmitted to an intermediary material 201 welded on the large spiral spring sleeve 203, so that the internal force generated by the intermediary material is F, and the transmission relationship between the forces can be known as F ═ F₁＝F₂(ii) a Therefore, the force F borne by the steel plate spring can be obtained according to the formulas (1), (2), (3) and (4)₂And the strain epsilon, so that the load F of a single steel plate spring can be obtained by measuring the strain epsilon of the mediator₂And finally, adding the load capacity of all the steel plate springs to obtain the load capacity of the whole vehicle.

As shown in fig. 8, the strain sensor 202 is mounted on the lateral surface in the middle of the interposer 201.

The number of data acquisition modules in the semi-trailer vehicle-mounted weighing system provided by the text is not fixed, is the same as the number of semi-trailer steel plate springs, and can be adapted to semi-trailers of different types.

The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the embodiment, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.