Attitude sensor precision real-time weighing system and method

Abstract

The invention relates to the technical field of vehicle-mounted weighing, in particular to an attitude sensor precise real-time weighing system and method, and the method comprises the steps: S1, setting collection points at different positions of a vehicle spring steel plate, and installing an attitude sensor at each collection point; s2, acquiring deflection angles of the corresponding acquisition points in the vertical direction and the horizontal direction by adopting an attitude sensor; s3, based on the deflection angle in the vertical direction, the initial cargo weight is obtained; and an unbalance loading error is obtained in combination with the deflection angle in the horizontal direction, and the unbalance loading error is superposed on the initial cargo weight to achieve correction of the initial cargo weight. The attitude sensor is tightly attached to the spring steel plate and is used for acquiring deflection angles of an acquisition point in the vertical direction and the horizontal direction in real time, and more accurate vehicle load is obtained through data fusion processing and mutual correction; meanwhile, on the basis of multi-data collection and real-time feedback, vehicle overload and vehicle unbalance loading can be avoided, and the driving safety of the vehicle is fully guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted weighing, and in particular to a precise real-time weighing system and method for a posture sensor. Background Art

[0002] With the rapid development of science and technology, on-board weighing technology, as an advanced high-tech means, is gradually showing its irreplaceable role in the fields of traffic management and logistics transportation. In the field of traffic management, on-board weighing technology has become an important tool for managing overloaded and overloaded transportation. As an important technical support in the field of traffic management, the on-board weighing system not only improves transportation efficiency, but also strengthens road safety supervision. Its importance is becoming increasingly prominent; in the field of logistics transportation, its efficiency and cost directly affect the operating quality of the overall economy, and promote the intelligent and refined process of industry management.

[0003] At present, the huge transportation highway freight system urgently needs a technology that can weigh the cargo on the vehicle in real time, which currently includes strain gauges, pressure sensors, magnetic / photosensitive encoders and other technologies. These traditional technologies have a common defect: they can only detect data in one dimension in the vertical direction. However, the chassis and frame of the truck are a self-coordinated dynamic system. In actual operation, the cargo on the vehicle is not completely uniform, and the center of gravity of the cargo is not in the center most of the time. At the same time, the road surface is not an absolute plane. Therefore, the center of gravity of the whole vehicle will randomly shift due to uneven cargo and uneven road surface, which leads to measurement errors. Therefore, the present invention has developed a precise real-time weighing system and method of attitude sensors to solve the problems existing in the prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a precise real-time weighing system and method for a posture sensor, so as to solve the problem in the prior art that vehicle-mounted weighing can only detect one dimension of data, resulting in large errors.

[0005] The technical solution of the present invention is: a precise real-time weighing method of a posture sensor, comprising:

[0006] S1. Set collection points at different positions of the vehicle spring steel plate, and install a posture sensor at each collection point; wherein the initial installation directions of the posture sensors on the front and rear sides of the same spring steel plate differ by 180°, and the initial installation directions of the posture sensors coaxially arranged parallel to the axle direction differ by 180°;

[0007] S2, using the attitude sensor to obtain the deflection angle of the corresponding collection point in the vertical direction and the horizontal direction;

[0008] S3. Based on the deflection angle in the vertical direction, the initial cargo weight is obtained; and the eccentric load error is obtained in combination with the deflection angle in the horizontal direction, and the eccentric load error is superimposed on the initial cargo weight to correct the initial cargo weight.

[0009] Preferably, in step S3, the method for calculating the initial cargo weight is:

[0010]

[0011] Where n is the total number of attitude sensors installed at all collection points;

[0012] K i is the elastic coefficient of the spring steel plate corresponding to each calibrated collection point;

[0013] α is the deflection angle in the vertical direction collected by each attitude sensor;

[0014] l0 is the straight-line distance between the sampling point and the midpoint of the spring steel plate, which is a constant;

[0015] h is the vertical movement of the spring steel plate under the pressure of the cargo weight;

[0016] In step S3, the method for calculating the eccentric load error is:

[0017] Δw=k j ×β

[0018] Among them, kj is the lateral coefficient corresponding to each calibrated acquisition point;

[0019] β is the horizontal deflection angle collected by each attitude sensor.

[0020] Preferably, in step S2, a threshold β of the horizontal deflection angle is set Y , set the threshold β Y Compare it with the horizontal deflection angle β monitored in real time by the attitude sensor to monitor the vehicle's load imbalance;

[0021] When the deflection angle β is less than the threshold β Y , executing step S3, using the deflection angle β to correct the initial cargo weight;

[0022] When the deflection angle β is greater than the threshold β Y , stop executing step S3 and issue a warning message.

[0023] Preferably, the threshold value β of the horizontal deflection angle is Y Set to 5°.

[0024] Preferably, in step S1, the collection points are set to include the front and rear ends of the spring steel plate, and the posture sensor is installed in contact with the spring steel plate and maintains the same deformation amount as the spring steel plate.

[0025] A precise real-time weighing system of a posture sensor, comprising a posture sensor, a vehicle communication network module, a data transmission module, a host and a cloud server platform;

[0026] The attitude sensor is mounted on the spring steel plate of the vehicle, fits the spring steel plate, and maintains the same deformation amount;

[0027] The data transmission module transmits the single-point data acquired at each collection point to the host through the vehicle-mounted communication network module;

[0028] The host receives all single-point data collected by the attitude sensor, packages and aggregates them, and sends them to the cloud server platform through the gateway, where the weight of the vehicle cargo is calculated.

[0029] Preferably, in the horizontal direction, the posture sensor is installed on the front and rear sides of each spring steel plate;

[0030] In the vertical direction, at the corresponding acquisition point, the posture sensor is located at any position on the circumference of the spring steel plate.

[0031] Compared with the prior art, the advantages of the present invention are:

[0032] (1) The attitude sensor is tightly installed on the spring steel plate, so that the attitude sensor and the spring steel plate maintain the same deformation, which is used to obtain the deflection angle of the collection point in the vertical and horizontal directions in real time. Through data fusion processing and mutual correction, a more accurate vehicle cargo weight can be obtained; at the same time, based on the collection and real-time feedback of multiple data, it can avoid vehicle overloading and vehicle unbalanced loading, fully ensuring the driving safety of the vehicle.

[0033] (2) At the position of the collection point corresponding to the installation of the attitude sensor, the initial cargo weight is obtained based on the deflection angle in the vertical direction, combined with the elastic coefficient and vertical movement of the spring steel plate; the eccentric load error is obtained based on the deflection angle in the horizontal direction, combined with the lateral coefficient. The initial cargo weight can be corrected by superimposing the eccentric load error on the initial cargo weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0035] Figure 1 It is a flow chart of a precise real-time weighing method of a posture sensor according to the present invention;

[0036] Figure 2 It is a schematic diagram of a precise real-time weighing system of a posture sensor according to the present invention;

[0037] Figure 3 This is a distribution principle diagram of the posture sensor of the present invention;

[0038] Figure 4 It is a schematic diagram of deformation of the leaf spring of the present invention when the leaf spring is deflected in the vertical direction;

[0039] Figure 5 It is a schematic diagram of deformation of the leaf spring of the present invention when the leaf spring is deflected in the horizontal direction;

[0040] Figure 6 This is a schematic diagram of the installation principle of the posture sensor combined with the leaf spring described in the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with specific embodiments:

[0042] For ease of understanding, the application scenario of this application is first explained. Since road transportation is the main mode of freight transportation, weighing the cargo on board is a necessary means to achieve intelligent and refined management. For freight vehicles, spring steel plates are necessary buffer components of freight vehicles. The weight of the vehicle can be fed back through the deformation of the spring steel plates. Therefore, this application combines the attitude sensor with the leaf spring to achieve efficient monitoring of the vehicle weight.

[0043] like Figure 1 , Figure 2 As shown, a precise real-time weighing method of a posture sensor includes the following:

[0044] Step 1:

[0045] Collection points are set at different positions of the spring steel plate of the vehicle, and a posture sensor is installed at each collection point; the collection points are set to include the front and rear ends of the spring steel plate, and the posture sensor is installed in contact with the spring steel plate. The installation method of magnetic force combined with adhesive is adopted to ensure the tightness of the posture sensor and the spring steel plate, so that the posture sensor can achieve the same deformation as the spring steel plate; at the same time, the above installation method does not require welding or punching, and there is no destructive installation to the vehicle, which does not affect driving safety; and the installation is simple and convenient, and no professional personnel are required, so it is more applicable. In one embodiment, in the horizontal direction, the posture sensor is installed on the front and rear sides of each spring steel plate; in the vertical direction, at the corresponding collection point, the posture sensor is at any position around the spring steel plate, that is, the posture sensor can be set in contact with any position of the front, rear, top, and bottom of the spring steel plate. In other embodiments, the posture sensor can also be installed on the tow bar of the vehicle.

[0046] Since the attitude sensor is also used to realize the offset correction, the installation direction of the attitude sensor needs to be reasonably configured in this application. Figure 3As shown, the initial installation directions of the attitude sensors on the front and rear sides of the same spring steel plate differ by 180°, and the initial installation directions of the attitude sensors coaxially arranged parallel to the axle direction differ by 180°; after this treatment, regardless of the unbalanced load of the cargo or the uneven road surface, the deflection angle output by each attitude sensor is symmetrical.

[0047] Step 2:

[0048] The attitude sensor is used to obtain the deflection angle of the corresponding collection point in the vertical and horizontal directions; among them, Figure 4 As shown in the figure, the vertical deflection angle is the deformation angle in the vertical direction after the vehicle carries the weight, which can provide the most intuitive feedback on the vehicle weight, but there is an error from the actual vehicle weight. Figure 5 As shown, the horizontal deflection angle is the deflection angle that occurs in the horizontal direction after the vehicle is overloaded. The overload condition will affect the vehicle-mounted feedback of the vertical deformation of the spring steel plate, and then the former will be corrected by the latter.

[0049] In order to avoid potential safety hazards caused by eccentric loading, a threshold value β of the horizontal deflection angle is set. Y , set the threshold β Y The horizontal deflection angle β monitored in real time by the attitude sensor is compared to monitor the vehicle load imbalance; in this embodiment, the threshold value β of the horizontal deflection angle is Y Set to 5°. (5°)

[0050] When the deflection angle β is less than the threshold β Y (5°), execute step 3, and use the deflection angle β to correct the initial cargo weight;

[0051] When the deflection angle β is greater than the threshold β Y (5°), stop executing step 3 and issue a warning message to remind the driver to stop and check to ensure driving safety.

[0052] Step 3:

[0053] Based on the deflection angle in the vertical direction, the initial cargo weight is obtained; and the eccentric load error is obtained in combination with the deflection angle in the horizontal direction. The eccentric load error is superimposed on the initial cargo weight to correct the initial cargo weight.

[0054] Specifically, Figure 6 As shown, the method for calculating the initial cargo weight is:

[0055]

[0056] Where n is the total number of attitude sensors installed at all collection points;

[0057] K iis the elastic coefficient of the spring steel plate corresponding to each calibrated collection point;

[0058] α is the deflection angle in the vertical direction collected by each attitude sensor;

[0059] l0 is the straight-line distance between the sampling point and the midpoint of the spring steel plate, which is a constant;

[0060] h is the vertical movement of the spring steel plate under the pressure of the cargo weight.

[0061] The method for calculating the eccentric load error is:

[0062] Δw=k j ×β

[0063] Among them, kj is the lateral coefficient corresponding to each calibrated acquisition point;

[0064] β is the horizontal deflection angle collected by each attitude sensor.

[0065] The initial cargo weight is superimposed on the off-center loading error to correct the initial cargo weight and obtain a more accurate vehicle weight.

[0066] In summary, the present invention is based on a posture sensor tightly installed on a spring steel plate, which is used to obtain the deflection angles of the collection point in the vertical and horizontal directions in real time, and obtain a more accurate vehicle cargo weight through data fusion processing and mutual correction; at the same time, based on the collection and real-time feedback of multiple data, it can avoid vehicle overloading and vehicle unbalanced loading, thereby fully ensuring the vehicle's driving safety.

[0067] The present invention also discloses a precise real-time weighing system for a posture sensor, which is used to execute the above weighing method. Figure 2 As shown, it includes a posture sensor, an on-board communication network module, a data transmission module, a host and a cloud server platform.

[0068] The attitude sensor is installed on the spring steel plate of the vehicle by means of magnetism and adhesiveness, fitting tightly with the spring steel plate and maintaining the same deformation.

[0069] The data transmission module transmits the single-point data obtained from each collection point to the host through the vehicle-mounted communication network module.

[0070] The host receives all single-point data collected by the attitude sensor, packages and summarizes them, and sends them to the cloud server platform through the gateway. The cloud server platform calculates the weight of the vehicle's cargo according to the above-mentioned attitude sensor's precise real-time weighing method.

[0071] Based on the above, during the application process, the present application can collect and calculate data when the vehicle is stopped. For example, real-time data can be collected during loading and unloading to obtain the current vehicle weight. However, during the movement of the vehicle, due to interference from external factors such as bumps, the collected data fluctuates greatly and is not valid.

[0072] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A precise real-time weighing method for a posture sensor, characterized in that: The specific weighing method is as follows: S1. Set collection points at different positions of the vehicle spring steel plate, and install a posture sensor at each collection point; wherein the initial installation directions of the posture sensors on the front and rear sides of the same spring steel plate differ by 180°, and the initial installation directions of the posture sensors coaxially arranged parallel to the axle direction differ by 180°; S2, using the attitude sensor to obtain the deflection angle of the corresponding collection point in the vertical direction and the horizontal direction; S3. Based on the deflection angle in the vertical direction, the initial cargo weight is obtained; and the eccentric load error is obtained in combination with the deflection angle in the horizontal direction, and the eccentric load error is superimposed on the initial cargo weight to correct the initial cargo weight.

2. The method for precise real-time weighing of a posture sensor according to claim 1, characterized in that: In step S3, the method for calculating the initial cargo weight is: Where n is the total number of attitude sensors installed at all collection points; K i is the elastic coefficient of the spring steel plate corresponding to each calibrated collection point; α is the deflection angle in the vertical direction collected by each attitude sensor; l0 is the straight-line distance between the sampling point and the midpoint of the spring steel plate, which is a constant; h is the vertical movement of the spring steel plate under the pressure of the cargo weight; In step S3, the method for calculating the eccentric load error is: Δw=k j ×β Among them, kj is the lateral coefficient corresponding to each calibrated acquisition point; β is the horizontal deflection angle collected by each attitude sensor.

3. A precise real-time weighing method for a posture sensor according to claim 2, characterized in that: In step S2, the threshold β of the horizontal deflection angle is set Y , set the threshold β Y Compare it with the horizontal deflection angle β monitored in real time by the attitude sensor to monitor the vehicle's load imbalance; When the deflection angle β is less than the threshold β Y , executing step S3, using the deflection angle β to correct the initial cargo weight; When the deflection angle β is greater than the threshold β Y , stop executing step S3 and issue a warning message.

4. A precise real-time weighing method for a posture sensor according to claim 3, characterized in that: The threshold β of the horizontal deflection angle Y Set to 5°.

5. The method for precise real-time weighing of a posture sensor according to claim 1, characterized in that: In step S1, the collection points are set to include the front and rear ends of the spring steel plate, and the posture sensor is installed in contact with the spring steel plate and maintains the same deformation amount as the spring steel plate.

6. A precise real-time weighing system for a posture sensor, used to execute a precise real-time weighing method for a posture sensor according to any one of claims 1 to 5, characterized in that: It includes attitude sensor, vehicle communication network module, data transmission module, host and cloud server platform; The attitude sensor is mounted on the spring steel plate of the vehicle, fits the spring steel plate, and maintains the same deformation amount; The data transmission module transmits the single-point data acquired at each collection point to the host through the vehicle-mounted communication network module; The host receives all single-point data collected by the attitude sensor, packages and aggregates them, and sends them to the cloud server platform through the gateway, where the weight of the vehicle cargo is calculated.

7. The precise real-time weighing system of a posture sensor according to claim 6, characterized in that: In the horizontal direction, the posture sensors are installed on the front and rear sides of each spring steel plate; In the vertical direction, at the corresponding acquisition point, the posture sensor is located at any position on the circumference of the spring steel plate.

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