CN217320185U

CN217320185U - Truck-mounted weight measuring device based on tension sensor

Info

Publication number: CN217320185U
Application number: CN202122653310.1U
Authority: CN
Inventors: 马明; 叶位彬
Original assignee: Shenzhen Shentuo Technology Co ltd
Current assignee: Shenzhen Shentuo Technology Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-08-30
Anticipated expiration: 2031-11-02

Abstract

The utility model discloses a truck-mounted weighing device based on force sensor, the device includes: the tension sensor is in a stretching state, and two ends of the tension sensor are respectively connected between the vehicle frame beam and the vehicle plate spring; and the signal processing device is used for receiving the tension change signal of the tension sensor when the load of the truck changes and acquiring the load value of the truck according to the tension change signal. Through setting up force sensor and elastic connection spare, make force sensor, elastic connection spare is in tensile state between frame roof beam and vehicle leaf spring all the time, when the freight train load, because the vehicle leaf spring takes place deformation, so the relative position between frame roof beam and the vehicle leaf spring changes, the force sensor who is in tensile state will change according to relative position and produce the pulling force change signal, sensitivity promotes the change that can reflect following goods weight of 100KG greatly, moreover, the steam generator is simple in structure, easy installation, need not to change the vehicle framework, the commonality is good, be applicable to the freight train suspension model of various differences.

Description

Truck load measuring device based on tension sensor

Technical Field

The utility model relates to a transportation auxiliary assembly technical field, in particular to freight car carries heavy measuring device based on tension sensor.

Background

With the rapid development of social economy, the level of people's living and production demands is continuously improved, the demand for logistics is increased greatly, and logistics trucks play an extremely important and irreplaceable role in the logistics. However, due to various reasons, overload is often caused, and as is well known, overload behavior not only causes irreversible damage to highways and bridges, but also brings great potential safety hazards to driving. Therefore, detecting and monitoring the overload behavior of the truck is a very important and significant matter, and is an important concern for the management of freight logistics. However, the truck is not usually shipped without a weighing function. If need weigh, generally through using the weighbridge, perhaps through installing weighing system additional on the car, current weighing system contains an acquisition processing terminal and four at least weighing sensor, weighing sensor distributes in four angles of frame crossbeam, fill up whole packing box, packing box weight pressure is on weighing sensor, the weight that every sensor surveyed adds up just is the weight of packing box, this weighing system is accurate though weighing, but need reform transform frame crossbeam, the fixed mode of packing box has been changed, and four angles are concentrated in weight transmission, increase local atress, bring certain potential safety hazard, and installation cost is high. In order to overcome the defects of the existing weighing system, the applicant previously proposed a cargo weighing and ranging device and a logistics vehicle thereof, wherein the cargo weighing and ranging device is used for measuring the longitudinal deformation of a vehicle plate spring and comprises: the elastic connecting piece is used for longitudinally connecting a vehicle plate spring to be tested; the stress sensor is used for connecting and measuring the longitudinal deformation of the elastic connecting piece; the signal processing module is used for collecting, filtering and amplifying the output signal of the stress sensor; and the processing controller is used for receiving the output signal processed by the signal processing module and acquiring the weight of the container according to the output signal. Through setting up stress sensor and elastic connecting piece, through elastic connecting piece and the vertical connection of vehicle leaf spring, elastic connecting piece produces elastic displacement along with the fore-and-aft deformation volume of vehicle leaf spring, has enlargied this deformation volume and can resist the interference error that the low frequency mechanical shock of vehicle brought betterly for the precision of finding range is below 0.01mm, simple structure, and the commonality is good, is applicable to the freight train suspension model of various differences.

However, the applicant finds that the vehicle leaf spring is weighed by acquiring the longitudinal deformation amount of the vehicle leaf spring, but the vehicle leaf spring is composed of a group of arc-shaped steel plates after the vehicle is loaded, the deformation is complex, the deformation direction is not only in the longitudinal direction, therefore, the measurement error of the longitudinal deformation amount influences the precision of the weighing system, the displacement amount needs to be amplified through an elastic connecting piece, the actual effect is not ideal, and further optimization is needed.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a truck carries heavy measuring device based on tension sensor can realize packing box automatic weighing, and simple structure, stability are good.

In order to solve the technical problem, the technical scheme of the utility model as follows:

the utility model discloses a first aspect provides a truck carries heavy measuring device based on force sensor, include:

the tension sensor is in a stretching state, and two ends of the tension sensor are respectively connected between the vehicle frame beam and the vehicle leaf spring;

and the signal processing device is used for receiving the tension change signal of the tension sensor when the load of the truck changes and acquiring the load value of the truck according to the tension change signal.

Furthermore, two ends of the tension sensor are fixed between the vehicle frame beam and the vehicle leaf spring along the vertical direction, and the tension sensor is in a stretching state.

Further, the truck-mounted weight measuring device further includes:

at least one elastic connecting piece, wherein at least one end of the tension sensor is connected with one end of the elastic connecting piece, and the other end of the elastic connecting piece is fixed to the frame beam and/or the vehicle leaf spring.

Further, the truck-mounted weight measuring device further includes:

a rigid tie through which one end of the tension sensor or the elastic connector is fixedly connected to the vehicle leaf spring.

Optionally, the elastic connecting piece is an elastic rope, a rubber band or a spring.

Optionally, the rigid tie is a multi-strand wound wire or a flat elongated sheet of metal.

Further, the vehicle leaf spring is provided with a wheel through a leaf spring fixing structural part, and the tension sensor or one end of the elastic connecting part is fixedly connected to the leaf spring fixing structural part through the rigid cable tie.

Adopt above-mentioned technical scheme, this on-vehicle heavy measuring device of goods based on tension sensor, through setting up tension sensor and elastic connection spare, make tension sensor, elastic connection spare is in tensile state between carriage roof beam and vehicle leaf spring all the time, when the freight train load, because the vehicle leaf spring takes place deformation, so relative position between carriage roof beam and the vehicle leaf spring changes, the tension sensor who is in tensile state will change according to relative position and produce the tensile force change signal, sensitivity promotes the change that can reflect the following goods weight of 100KG greatly, moreover, the steam generator is simple in structure, easy installation, need not to change the vehicle framework, and the commonality is good, be applicable to the freight train suspension model of various differences.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic structural view of a truck load measuring device based on a tension sensor according to an embodiment of the present invention;

fig. 2 is a schematic view of a first installation state of the truck load measuring device based on the tension sensor according to the embodiment of the present invention;

fig. 3 is a schematic view of a second installation state of the truck-mounted weight measuring device based on the tension sensor according to the embodiment of the present invention;

in the figure, 10-truck-mounted weight measuring device, 11-tension sensor, 12-elastic connector, 13-rigid tie, 14-signal processing device;

20-frame beam, 30-vehicle plate spring, 40-plate spring fixing structural part and 50-wheel.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, the embodiment of the present invention provides a truck-mounted weight measuring device 10 based on a tension sensor, including:

a tension sensor 11, wherein the tension sensor 11 is in a tension state, and two ends of the tension sensor 11 are respectively connected between the vehicle frame beam 20 and the vehicle leaf spring 30;

and the signal processing device 14 is configured to receive a tension change signal of the tension sensor 11 when the load of the truck changes, and obtain a load value of the truck according to the tension change signal.

Specifically, both ends of the tension sensor 11 are fixed between the frame member 20 and the vehicle leaf spring 30 in the vertical direction, and the tension sensor is in a stretched state.

The signal processing device 14 may include:

the signal processing module is used for collecting, filtering and amplifying the output tension change signal of the tension sensor 11;

and the processing controller is used for receiving the tension change signal processed by the signal processing module and acquiring the load value of the truck according to the tension change signal.

And the ADC device is used for receiving the tension change signal processed by the signal processing module, converting the tension change signal into a digital signal and transmitting the digital signal to the processing controller.

Optionally, the processing controller may be a device such as an MCU processor, for example, a 32-bit monolithic computer STM32F072 of the ST company is selected as the processing controller, and the functional modules of the signal processing module of the apparatus are realized by the integrated function of the monolithic computer STM32F072, and all of the functional modules are run on the STM32F072 monolithic computer, and the corresponding function can be realized by using the existing computer program without any improvement in software. Meanwhile, 12-bit ADC (analog-to-digital converter) is integrated in the STM32F072 single chip microcomputer to realize the function of an ADC device of the device.

The signal processing module has the following working process: the tension sensor 11 transmits an analog output signal; filtering the input analog signal; amplifying the filtered signal and performing integral linear lifting on the signal by using a reference voltage; restoring the signal to a signal value before lifting by using a single-ended to differential circuit; filtering the recovered signal and outputting the signal to a post-stage for processing; under the condition of single power supply of the amplifying circuit, the purpose of firstly increasing the output voltage range and then restoring the output voltage range to the original value is to eliminate the nonlinear problem of the output signal of the instrument amplifying circuit.

As shown in fig. 1, the truck-mounted weight measuring device 10 further includes:

at least one elastic connecting member 12, at least one end of the tension sensor 11 is connected to one end of the elastic connecting member 12, and the other end of the elastic connecting member 12 is fixed to the frame rail 20 and/or the vehicle leaf spring 30.

Optionally, the elastic connecting element 12 is a bungee cord, a rubber band or a spring.

As shown in fig. 1 and 2, the truck-mounted weight measuring device 10 further includes:

one end of the rigid cable tie 13, the tension sensor 11 or the elastic connecting member 12 is fixedly connected to the vehicle leaf spring 30 through the rigid cable tie 13.

And a rigid tie 13 for connecting the vehicle leaf spring 30 and the elastic connection member 12, and transmitting the deformation of the vehicle leaf spring 30 to the elastic connection member 12. Due to the fact that the shapes of vehicle leaf springs of vehicles of different models are different greatly, the vehicle leaf springs of different shapes can be fixed through the flexible cable ties. The strap may be looped around the vehicle leaf spring and then connected to the resilient connector, or the strap may be threaded through a structural member of the vehicle leaf spring assembly and then connected to the resilient connector, such that changes in the vertical direction of the vehicle leaf spring are imparted to the resilient material. In order to effectively transmit the deformation of the vehicle leaf spring to the elastic connection, the strap is a rigid material, such as an alloy. The tie may be a flat piece of metal in shape or may be a multi-strand wound wire.

As shown in fig. 3, the vehicle leaf spring 30 is mounted with a wheel 50 through a leaf spring fixing structural member 40, and one end of the tension sensor 11 or the elastic connector 12 is fixedly connected to the leaf spring fixing structural member 40 through the rigid tie 13.

During the use, the freight train uses the vehicle leaf spring to cushion the vibrations of road surface jolt to the goods usually, and the vehicle leaf spring comprises a set of arc steel sheet, has elasticity, and the change of goods weight can arouse the deformation of vehicle leaf spring, can calculate goods weight through measuring this deformation. The change of the curvature of the plate spring of the vehicle is caused by the change of the weight of the goods; the change of the curvature of the vehicle plate spring causes the rigid binding belt to displace in the vertical direction; displacement of the rigid tie causes expansion and contraction of the elastic connecting piece; the stretching of the elastic connecting piece causes the tension of two ends of the elastic connecting piece to change; the tension sensor converts the tension change into an electric signal; the change in the electrical signal will reflect a change in the weight of the cargo. The weight of the cargo can be calculated by measuring the electric signals.

The frame and the concentrated box of the concentrated box truck can be separated, and the frame comprises a bearing frame beam, a vehicle leaf spring for buffering, wheels, a structural part for connecting and fixing and the like. The vehicle leaf spring is connected through the structure to the frame roof beam, and vehicle leaf spring rethread structure connects the wheel, because these are connected for rigid connection, press on the frame when the collection box, main deformation takes place on the vehicle leaf spring. Deformation of the vehicle leaf spring causes the spacing between the frame rail and the vehicle leaf spring to change, with the greatest change in spacing between the center region of the vehicle leaf spring and the frame rail. Since the spring constant of the vehicle leaf springs is relatively constant, this change in spacing will reflect a change in cargo weight.

In the present embodiment, as shown in fig. 2, one end of the tension sensor 11 is fixed to the frame member 20 by a bolt, and is selectively fixed to a position facing the center region of the vehicle leaf spring 30. The other end of the tension sensor 11 is connected with a spring through a steel wire, the other end of the spring is connected with the steel wire, and the other end of the steel wire is wound in the central area of the vehicle plate spring. Thus, the change of the distance between the vehicle frame beam 20 and the vehicle leaf spring 30 is converted into the change of the length of the spring, so that the tension of the two ends of the spring is changed, and the tension sensor 11 converts the tension change into the change of an electric signal. Thus, the weight change of the cargo is converted into the change of the electric signal.

In this embodiment, there is also an example of a connection method of the vehicle leaf spring, and as shown in fig. 3, other connection methods are kept unchanged except that the connection method of the wire and the vehicle leaf spring 30 is changed. The wire is connected at one end to the spring and at the other end to a fixed structural member 40 of the vehicle leaf spring 30. Since the fixed structural member 40 of the vehicle leaf spring 30 and the vehicle leaf spring 30 are rigidly connected, the connection to either one is equivalent to the present embodiment.

The utility model discloses on-truck load measuring device based on tension sensor, through setting up tension sensor and elastic connection spare, make tension sensor, elastic connection spare is in tensile state between carriage roof beam and vehicle leaf spring all the time, when the freight train load, because the vehicle leaf spring takes place deformation, relative position between carriage roof beam and the vehicle leaf spring changes so, the tension sensor who is in tensile state will change according to relative position and produce the tension change signal, sensitivity promotes the change that can reflect the freight weight below 100KG greatly, moreover, the steam generator is simple in structure, easy installation, need not to change the vehicle framework, and the commonality is good, be applicable to the freight train suspension model of various differences.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and these embodiments are still within the scope of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "row", "column", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present patent application, unless otherwise specifically stated or limited, the terms "mounted", "connected", "fixed", "fixedly connected", and the like are to be understood broadly, and may be, for example, a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present patent application, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Claims

1. A truck-mounted weight measuring device based on a tension sensor, the device comprising:

the tension sensor is in a stretching state, and two ends of the tension sensor are respectively connected between the vehicle frame beam and the vehicle plate spring; the two ends of the tension sensor are fixed between the frame beam and the vehicle leaf spring along the vertical direction, and the tension sensor is in a stretching state;

2. The tension sensor-based truck weight measuring device according to claim 1, further comprising:

3. The tension sensor-based truck weight measuring device according to claim 2, further comprising:

a rigid tie, one of the ends of the tension sensor or the elastic connector being secured to the vehicle leaf spring by the rigid tie connection.

4. The tension sensor-based truck-mounted weight measuring device according to claim 2, wherein the elastic connecting member is a bungee cord, a rubber band, or a spring.

5. The tension sensor-based truck mounted weight measuring device according to claim 3, wherein the rigid tie is a multi-strand wound wire or a flat elongated metal sheet.

6. The tension sensor-based truck-mounted weight measuring device according to claim 3, wherein the vehicle leaf spring mounts the wheel through a leaf spring fixing structure, and one of the ends of the tension sensor or the elastic connector is fixed to the leaf spring fixing structure through the rigid tie connection.