Truck load metering sensor z-shaped connection method and metering system

Abstract

The application discloses a truck load measurement sensor Z-shaped connecting method and a measurement system, and relates to the technical field of truck load measurement. The truck load measurement sensor Z-shaped connecting method comprises a sensor, a mounting base and a Z-shaped connecting piece. One end of the sensor is fixedly connected with a cross beam through the mounting base, and the other end of the sensor is fixedly connected with the cross beam through the Z-shaped connecting piece and the mounting base. The method and the measurement system adopt the elastic Z-shaped connecting piece to connect the sensor, thereby reducing the influence of installation on the sensor, achieving the goals of simplifying the installation and adjustment mode of the sensor, optimizing the use of the sensor and prolonging the service life of the sensor.

Description

Technical Field

[0001] This invention relates to the field of truck load measurement technology, and in particular to a Z-shaped connection method and measurement system for truck load measurement sensors. Background Technology

[0002] With the rapid development of the road transport industry, maximizing freight profits is the ultimate goal for both freight companies and individual freight operators. Truck on-board weighing sensors can measure load in real time to help truck drivers adopt loading strategies closest to their rated load, reduce the number of times they have to queue at the weighbridge, and save on transportation time and costs. Most existing truck on-board weighing sensors are installed using a rigid connection method where both ends are fixed to the object being measured or a fixed component. While this rigid connection method is suitable for general load measurement sensor applications, it carries the risk of sensor damage due to overload in truck load measurement sensor applications.

[0003] In the installation of truck load cell sensors, welding is required to secure the sensor fasteners. However, installation deviations caused by welding can easily lead to significant initial stress on the sensor even when the truck is static. This causes the sensor to approach its maximum detection capacity before the truck is loaded, resulting in sensor overload after loading or during movement. Ultimately, this can lead to loss of measurement accuracy or permanent damage to the sensor. In summary, existing metering sensor installations suffer from the following problems:

[0004] 1. Most existing metering sensors are installed by fixing both ends to the object being measured or a fixed component, which is a rigid connection method. This can easily cause overload and is not conducive to the maintenance and replacement of the sensor.

[0005] 2. Traditional welding fastener installation methods expose the sensor to high temperature and high pressure welding processes, causing heat to be conducted to the sensor through the mounting gasket, which can easily damage the sensor chip and thus affect the load measurement work.

[0006] 3. Manual calibration based on traditional experience values ​​can easily lead to unevenness of the fixing nuts at both ends, resulting in greater static stress and affecting the accuracy of load measurement. Summary of the Invention

[0007] The purpose of this invention is to at least solve one of the above-mentioned technical problems in the installation of existing metering sensors, and to provide a Z-shaped connection method and metering system for truck load metering sensors. This method and metering system use a flexible Z-shaped connecting piece to connect the sensor, thereby reducing the impact of installation on the sensor, thus simplifying the installation and adjustment of the sensor, optimizing the use of the sensor, and improving the service life of the sensor.

[0008] Therefore, the technical solution of the present invention is a Z-shaped connection method for a truck load capacity metering sensor, specifically including the following:

[0009] Sensor initialization and installation; sensor measurement value initialization. If initialization fails, re-initialize the sensor measurement values; if initialization succeeds, proceed to the next step.

[0010] Input initial parameters to initialize coefficients λ1 and b1. Initial parameters include installation position x, truck static real-time load W, beam length L, sensor effective installation length l1, Z-type connecting piece effective installation length l2, and sensor bending stiffness EI.

[0011] The sensor deformation sensing quantity s0 and sensor sensing coefficient k3 are calculated based on the sensor deformation sensing model.

[0012] The real-time load W of the truck is calculated based on the truck load perception model.

[0013] If the truck load measurement does not meet the accuracy requirements, it is necessary to recalculate and re-enter the initial parameters;

[0014] The load measurement electrical signal is derived from the sensor to obtain real-time data on the truck's load, which is then uploaded to the cloud. Preferably, a sensor deformation sensing model and a truck load sensing model are constructed.

[0015] The method is, first

[0016] Initialize and install the sensor. The sensor installation position is recorded as x. The sensor installation position is measured starting from the center point of the sensor.

[0017] Secondly, obtain the truck load W, the crossbeam length L, the effective installation length of the sensor l1, the effective installation length of the Z-type connecting piece l2, and the bending stiffness of the Z-type connecting piece EI;

[0018] Then, the sensor deformation sensing parameter k1 is calculated using the sensor installation position x and the beam length L: At this time, the crossbeam generates a corresponding longitudinal deformation y at the sensor installation position x, and establishes the conversion relationship between the longitudinal deformation y and the load W: y=λ1(x,L,EI)*k1(x,L)*W+b1; After the sensor is installed, the truck is loaded and unloaded with goods of different weights W, and the longitudinal deformation y at x is measured in real time. λ1 and b1 are obtained by using linear regression analysis, and the parameters λ1 and b1 are continuously recalibrated during subsequent loading and unloading processes.

[0019] The load parameter k2 is obtained by calculating the sensor installation position x, beam length L, load W, and bending stiffness EI of the Z-type connecting piece.

[0020] Based on the load capacity k2, installation position x, beam length L, and bending stiffness EI of the Z-shaped connecting piece, a sensor deformation sensing model is established:

[0021]

[0022] Based on the sensor deformation sensing model, the truck load sensing model can be obtained:

[0023]

[0024] Preferably, the initialization of the sensor measurement values ​​involves fixing one end of the sensor and recording the static load measurement value w1 at that time. After fixing the other end, the static load measurement value w2 at that time is also recorded. |w2-w1| should not exceed 10% of the sensor's maximum range. If this is not met, the Z-shaped connecting piece needs to be readjusted before installation and testing.

[0025] Preferably, the method for initializing coefficients λ1 and b1 is to measure two sets of values ​​(W1, y1) and (W2, y2) of the longitudinal deformation y corresponding to the static load W and x of the truck, thereby initializing coefficients λ1 and b1:

[0026] Preferably, the method for calculating the sensor deformation sensing quantity s0 and the sensor sensing coefficient k3 based on the sensor deformation sensing model is as follows: given the truck load W0, record the sensor load measurement value w0 at this time, calculate the sensor deformation sensing quantity s0 according to the formula of the sensor deformation sensing model, and thus calculate the sensor sensing coefficient k3.

[0027] Preferably, the method for calculating the real-time load W of a truck based on the truck load perception model is as follows: given the real-time load measurement value w from the sensor, calculate the real-time load W of the truck according to the formula of the truck load perception model:

[0028]

[0029] A truck load cell metering system with Z-shaped connection includes a sensor, a mounting base, and a Z-shaped connecting piece. The sensor and the Z-shaped connecting piece are fixedly connected to form a measuring component. The measuring component is installed horizontally. The measuring component measures the load of the truck by detecting the deformation of the horizontal beam.

[0030] Preferably, one end of the sensor is fixedly connected to the crossbeam via a mounting base, and the other end of the sensor is fixedly connected to the crossbeam via a Z-shaped connecting piece and a mounting base.

[0031] Preferably, the sensor and the Z-shaped connecting piece are fixedly connected by a cup-head screw and a screw washer.

[0032] Preferably, the Z-shaped connecting piece is fixedly connected to the mounting base by cup-head screws and screw washers.

[0033] The beneficial effects of this invention are:

[0034] 1. During sensor initialization and installation, it can prevent bending stress after welding and cooling from damaging the sensor.

[0035] 2. When the truck is stationary, if the vehicle is overloaded during the loading process, the Z-shaped connecting piece will deform to prevent the sensor from being damaged by overload.

[0036] 3. When the truck body is impacted during operation, the Z-shaped connecting piece can absorb the energy generated by the impact, thus protecting the sensors. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the Z-shaped connection method for the truck load metering sensor of the present invention;

[0038] Figure 2 This is a schematic diagram of the deflection curve of a vehicle's crossbeam under stress.

[0039] Figure 3 This is a schematic diagram of the Z-shaped connection installation of the vehicle load cell.

[0040] Explanation of symbols in the diagram:

[0041] 1. Sensor; 2. Cup head screw; 3. Screw washer; 4. Mounting base; 5. Crossbeam; 6. Z-shaped connecting piece; 7. Communication cable. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that in the description of this invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0046] This invention mainly utilizes Z-shaped connecting pieces to achieve the goal of protecting the metering sensor, and uses the crossbeam load strain effect to sense the relationship between the sensor shape deformation and the truck load.

[0047] Example 1

[0048] like Figure 1 As shown, a Z-shaped connection method for a truck load capacity metering sensor specifically includes the following:

[0049] Step 1: Sensor initialization and installation;

[0050] Step 2: Initialize sensor measurement values. If initialization fails, re-initialize the sensor measurement values; if initialization succeeds, proceed to the next step.

[0051] The initialization of sensor measurement values ​​is as follows: fix one end of the sensor and record the static load measurement value w1 of the sensor at this time. After fixing the other end, record the static load measurement value w2 of the sensor at this time. |w2-w1| should not exceed 10% of the maximum range of the sensor. If it does not meet the requirement, the Z-shaped connecting piece needs to be readjusted before installation and testing.

[0052] Step 3: Input initial parameters

[0053] Input initial parameters: installation position x, truck static real-time load W, beam length L, effective sensor installation length l1, effective Z-type connecting piece installation length l2, sensor bending stiffness EI. Measure two sets of values ​​(W1, y1) and (W2, y2) of the longitudinal deformation y corresponding to the truck static load W and x, and then initialize coefficients λ1 and b1:

[0054] Step 4: Calculate the sensor deformation sensing quantity s0 and the sensor sensing coefficient k3 based on the sensor deformation sensing model.

[0055] Given the truck's load W0, record the sensor's load measurement value w0 at this time. Calculate the sensor's deformation sensing value s0 according to formula (4), and thus calculate the sensor's sensing coefficient.

[0056] Step 5: Calculate the real-time load W of the truck based on the truck load perception model.

[0057] Given the real-time load measurement value w from the sensor, calculate the real-time load W of the truck according to formula (5):

[0058]

[0059] Step 6: If the truck load measurement does not meet the accuracy requirements, it needs to be recalculated. Return to step 3 and re-enter the initial parameters.

[0060] Step 7: Based on the load metering electrical signal exported from the sensor, obtain the real-time data of the truck's load and upload it to the cloud.

[0061] Example 2

[0062] like Figure 2 As shown, the sensor is first initialized and installed. The sensor installation position is recorded as x, and the sensor installation position is measured from the center point of the sensor.

[0063] Secondly, the following parameters are obtained: truck load W, beam length L, effective sensor installation length l1, effective Z-type connecting piece installation length l2, and bending stiffness of the Z-type connecting piece EI.

[0064] Then, the sensor deformation sensing parameter k1 is calculated based on the sensor installation location and the beam length.

[0065] At this time, the crossbeam generates a corresponding longitudinal deformation y at the sensor installation position x, and the conversion relationship between the longitudinal deformation y and the load W is established: y=λ1(x,L,EI)*k1(x,L)*W+b1.

[0066] After the sensor is installed, it is used to load and unload goods of different weights W onto trucks and measure the longitudinal deformation y at x in real time. λ1 and b1 are obtained using linear regression analysis, and the parameters are continuously recalibrated during subsequent loading and unloading processes.

[0067] The load parameter k2 is obtained by calculating the sensor installation position x, beam length L, load W, and bending stiffness EI of the Z-type connecting piece.

[0068] Based on the calculated load parameter k2, installation position x, beam length L, and bending stiffness of the Z-shaped connecting piece EI, a sensor deformation sensing model is established:

[0069]

[0070] Based on the sensor deformation sensing model, the truck load sensing model can be obtained:

[0071]

[0072] The specific calculation process is as follows:

[0073] 1. Construct a sensor deformation sensing model

[0074] make

[0075]

[0076] Where l1 represents the effective installation length of the sensor, and l2 represents the effective connection length of the Z-shaped connector.

[0077] At this moment, the crossbeam undergoes a corresponding longitudinal deformation y at position x, and its relationship with the load W is as follows:

[0078] y=λ1(x,L,EI)*k1(x,L)*W+b1 (2)

[0079] λ1 is a coefficient related to the beam's bending stiffness EI, length L, and installation position x, while b1 is a measurement bias term related to the truck's initial load. Both parameters need to be obtained through machine learning.

[0080] make

[0081]

[0082] Then, a sensor deformation sensing model can be established from (3).

[0083]

[0084] 2. Construct a truck load perception model

[0085] Based on (4), the truck load perception model can be obtained:

[0086]

[0087] Example 3

[0088] like Figure 3 The aforementioned truck load metering sensor Z-shaped connection metering system includes a sensor 1, a mounting base 4, and a Z-shaped connecting piece 6. One end of the sensor 1 is fixedly connected to a crossbeam 5 via the mounting base 4, and the sensor 1 and the mounting base 4 are fixedly connected via cup-head screws 2 and screw washers 3. The other end of the sensor 1 is fixedly connected to the crossbeam 5 via the Z-shaped connecting piece 6 and the mounting base 4, and the sensor 1 and the Z-shaped connecting piece 6 are fixedly connected via cup-head screws 2 and screw washers 3. The Z-shaped connecting piece 6 and the mounting base 4 are fixedly connected via cup-head screws 2 and screw washers 3. The sensor 1 is connected to a control unit module via a communication cable 7.

[0089] Sensor 1 and Z-shaped connecting piece 6 are fixedly connected to form a measuring component. The measuring component is installed horizontally. Both ends of the measuring component are fixedly connected to the horizontal beam 5 through mounting base 4. The load of the truck is measured by detecting the deformation of the horizontal beam 5.

[0090] When the truck is stationary, the sensor can avoid damage to the sensor caused by bending stress after welding and cooling during initial installation. When the truck is loaded, if the vehicle is overloaded during loading, the Z-shaped connecting piece will deform to prevent the sensor from being overloaded and damaged. When the truck is moving and the vehicle body is impacted, the Z-shaped connecting piece can absorb the energy generated by the impact and protect the sensor.

[0091] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A Z-shaped connection method for a truck load capacity metering sensor, characterized in that, Specifically, it includes the following: Sensor initialization and installation; sensor measurement value initialization. If initialization fails, re-initialize the sensor measurement values; if initialization succeeds, proceed to the next step. Input initial parameters to initialize the coefficients. and Initial parameters include installation location Real-time load of trucks , crossbeam length Effective installation length of the sensor Effective installation length of Z-type connector Bending stiffness of Z-type connecting piece ; The sensor deformation sensing quantity is calculated based on the sensor deformation sensing model. and sensor sensing coefficient k3; The real-time load of the truck is calculated based on the truck load perception model. ; If the truck load measurement does not meet the accuracy requirements, it is necessary to recalculate and re-enter the initial parameters; The load measurement electrical signal is exported from the sensor to obtain real-time data on the truck's load, which is then uploaded to the cloud. The method for constructing the sensor deformation sensing model and the truck load sensing model is to initialize and install the sensors, and the sensor installation location is denoted as... The sensor installation position is measured starting from the center point of the sensor; Get real-time load of trucks , crossbeam length Effective installation length of the sensor Effective installation length of Z-type connector The bending stiffness of the Z-shaped connecting piece is ; Sensor installation location With the length of the beam Calculate and obtain the sensor deformation sensing parameter k1: At this time, the crossbeam is at the sensor installation position. Generate a corresponding longitudinal deformation Establish longitudinal deformation Real-time load of trucks The conversion relationship between them: After the sensors are installed, they are used to load and unload goods of different weights onto and off trucks, and the measurements are taken in real time. The corresponding longitudinal deformation Obtaining by using linear regression analysis and Furthermore, during the subsequent loading and unloading process, the parameters were continuously adjusted. and Perform recalibration; Sensor installation location Length of crossbeam Real-time load of trucks The bending stiffness of the Z-type connecting piece is Calculate and obtain the load parameter k2: , Based on load parameter k2 and installation location Length of crossbeam The bending stiffness of the Z-type connecting piece is Establish a sensor deformation sensing model: ， Based on the sensor deformation sensing model, the truck load sensing model can be obtained: 。 2. The Z-shaped connection method for a truck load metering sensor according to claim 1, characterized in that, The initialization of the sensor measurement values ​​involves fixing one end of the sensor and recording the sensor's first static load measurement value at that moment. After the other end is fixed, record the second static load measurement value of the sensor at this time. , The range should not exceed 10% of the sensor's maximum range. If this is not met, the Z-shaped connecting piece needs to be readjusted before installation and testing.

3. The Z-shaped connection method for a truck load metering sensor according to claim 1, characterized in that, Initial coefficients and The method is to measure the real-time load of the truck. and The corresponding longitudinal deformation Two sets of values , Thus initializing the coefficients and : , .

4. The Z-shaped connection method for a truck load metering sensor according to claim 1, characterized in that, The sensor deformation sensing quantity is calculated based on the sensor deformation sensing model. The method for determining the sensor sensing coefficient k3 is based on the real-time load of the truck. Record the sensor load measurement value at this time. The sensor deformation sensing quantity is calculated based on the sensor deformation sensing model formula. Thus, the sensor sensing coefficient can be calculated. .

5. The Z-shaped connection method for a truck load metering sensor according to claim 1, characterized in that, The real-time load of the truck is calculated based on the truck load perception model. The method is to give the real-time load measurement value of the sensor. The real-time load of the truck is calculated based on the truck load perception model formula. : 。 6. A metering system with a Z-shaped connection of a truck load capacity metering sensor, characterized in that, The Z-shaped connection method for a truck load metering sensor according to claim 1 includes a sensor, a mounting base, and a Z-shaped connecting piece. The sensor and the Z-shaped connecting piece are fixedly connected to form a measuring component. The measuring component is installed horizontally. The measuring component measures the load of the truck by detecting the deformation of the horizontal beam.

7. A metering system for a truck load capacity metering sensor with a Z-shaped connection according to claim 6, characterized in that, One end of the sensor is fixedly connected to the crossbeam via a mounting base, and the other end of the sensor is fixedly connected to the crossbeam via a Z-shaped connecting piece and a mounting base.

8. A metering system for a truck load capacity metering sensor with a Z-shaped connection according to claim 7, characterized in that, The sensor and the Z-shaped connecting piece are fixedly connected by cup-head screws and screw washers.

9. A metering system for a truck load capacity metering sensor with a Z-shaped connection according to claim 8, characterized in that, The Z-shaped connecting piece is fixedly connected to the mounting base by cup-head screws and screw washers.

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