A heavy goods vehicle weighing system

Abstract

The application provides a heavy goods transportation weighing system, and relates to the technical field of dynamic weighing.The technical scheme is as follows: two portal frames are installed above a weighing lane at intervals, a dynamic scale platform is arranged between the portal frames, and a license plate recognition camera is arranged on one side of the weighing lane and in front of the weighing platform.The dynamic scale platform comprises a base and a weighing platform installed on the base.A scale-out axle counter is installed at the front end of the weighing platform, a scale-in axle counter is installed at the rear end of the weighing platform, the upper surfaces of the scale-out axle counter and the scale-in axle counter are flush with the upper surface of the weighing platform, an axle recognition device is installed behind the dynamic scale platform, and two of the portal frames are provided with snapshot cameras.The system has the advantages of accurately judging the state of vehicles entering and leaving the weighing platform, improving the accuracy of weighing data, monitoring the driving state of vehicles in real time, and improving the matching degree of license plate recognition.

Description

Technical Field

[0001] This utility model relates to the field of dynamic weighing technology, and more specifically, to a weighing system for transporting large items. Background Technology

[0002] In the field of heavy haulage, vehicle weighing is a crucial step in ensuring transportation safety and the integrity of road infrastructure. Traditional weighing systems have several shortcomings: First, ordinary weighing equipment struggles to accurately identify the unique axle types and tire counts of heavy haulage vehicles; second, the lack of effective vehicle separation detection methods makes it difficult to ensure that the vehicle is fully inside the weighing platform before weighing. Furthermore, existing technologies suffer from low matching rates between license plate recognition and weighing data, and lack the ability to monitor the vehicle's driving status throughout the entire process. These problems frequently lead to inaccurate data and misjudgments of vehicle status during heavy haulage weighing, severely impacting the reliability of weighing results. Especially when dealing with oversized and overweight heavy haulage vehicles, existing systems are insufficient to meet the demands for accurate weighing and comprehensive monitoring. Therefore, existing technologies urgently need improvement to address these issues. Utility Model Content

[0003] The purpose of this application is to provide a heavy-duty transportation weighing system, which has the advantages of accurately judging the status of vehicles entering and leaving the weighing platform, improving the accuracy of weighing data, monitoring the vehicle driving status in real time, and improving the license plate recognition matching accuracy.

[0004] This application provides a heavy-duty transport weighing system, the technical solution of which is as follows: it includes two gantries installed at intervals above the weighing lane, a dynamic weighing platform located between the gantries, and a license plate recognition camera located on one side of the weighing lane and in front of the weighing platform. The dynamic weighing platform includes a base and a weighing platform installed on the base. An exit axle counter is installed at the front end of the weighing platform, and an inlet axle counter is installed at the rear end of the weighing platform. The upper surfaces of the exit axle counter and the inlet axle counter are flush with the upper surface of the weighing platform. A wheel axle identifier is installed behind the dynamic weighing platform, and a capture camera is installed on the two gantries.

[0005] Furthermore, this application also proposes that vehicle separators be provided on both sides of the weighing lane, with the front and rear positions of the vehicle separators located behind the weighing platform.

[0006] Furthermore, this application also proposes that the gantry spans the weighing lane and the opposite lane located to the left of the weighing lane, and the capture camera located on the rear gantry is a side-facing capture camera, which is located above the opposite lane and faces the dynamic weighing platform.

[0007] Furthermore, this application also proposes that a second capture camera be installed on the outer side of the weighing lane, the second capture camera being positioned towards the rear of the dynamic weighing platform, and the second capture camera and the side capture camera being located on opposite sides of the weighing lane.

[0008] Furthermore, this application also proposes that the axle counter for exiting the weighing scale, the axle counter for entering the weighing scale, and the wheel axle identifier are all located on the right half of the lane.

[0009] Furthermore, this application also proposes that an inductive loop is installed on the weighing lane behind the dynamic weighing platform.

[0010] Furthermore, this application also proposes that a license plate recognition camera is installed on the outer side of the weighing lane, with the front and rear positions of the license plate recognition camera located in front of the weighing platform.

[0011] Furthermore, this application also proposes that the base is embedded in the weighing lane through a concrete foundation, a weighing sensor is provided at the connection between the weighing platform and the base, and an exit axle counter and an entry axle counter are located above the weighing sensor.

[0012] This application provides a heavy-duty transport weighing system that, through the coordinated operation of axle counters and wheel axle identifiers symmetrically arranged at the front and rear, combined with a multi-angle capture camera and a vehicle separation device, achieves accurate judgment and full-process monitoring of vehicle entry and exit status. It has the advantages of improving the reliability of weighing data, enhancing vehicle status recognition capabilities, and optimizing license plate matching accuracy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0015] Figure 3 This is a cross-sectional view of the dynamic weighing platform in this utility model. Figure 1 ;

[0016] Figure 4 This is a cross-sectional view of the dynamic weighing platform of this utility model. Figure 2 ;

[0017] Figure 5 This is a top view of the dynamic weighing platform of this utility model.

[0018] In the diagram: Weighing lane 1, gantry 2, dynamic weighing platform 3, base 3.1, weighing platform 3.2, license plate recognition camera 4, exit axle counter 5, entry axle counter 6, wheel axle recognizer 7, capture camera 8, side capture camera 8.1, vehicle separator 9, second capture camera 10, opposite lane 11, inductive loop 12. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In existing technologies, dynamic weighing of heavy-duty transport vehicles often faces problems such as misjudgment of vehicle direction, weighing data deviation, and monitoring blind spots. Traditional solutions rely on conventional axle scales, which struggle to capture vehicle entry and exit status in real time and lack accurate identification of axle type and tire quantity. During dynamic weighing, vehicles reversing or not fully entering the weighing platform can easily lead to data anomalies, while existing capture devices cannot cover the entire vehicle due to angle limitations, affecting the accuracy of data matching.

[0022] To address the aforementioned issues, a system capable of simultaneously acquiring vehicle driving direction, axle count information, and multi-dimensional image data is required. By analyzing the physical trajectory of vehicles entering and exiting the weighing platform, it is proposed to install axle counters before and after the weighing platform 3.2 to detect the sequence of axle count changes, combined with a wheel and axle identifier 7 to obtain axle type parameters. Simultaneously, a multi-angle capture camera 8 is mounted on the gantry 2 structure to form a three-dimensional monitoring network.

[0023] Therefore, as Figures 1 to 5 As shown, this application proposes a dynamic weighing platform 3, which includes two gantries 2 installed at intervals above the weighing lane 1, a dynamic weighing platform 3 located between the gantries 2, and a license plate recognition camera 4 located on the right side of the weighing lane 1 and in front of the weighing platform 3.2. The dynamic weighing platform 3 includes a base 3.1 and a weighing platform 3.2 installed on the base 3.1. An exit axle counter 5 is installed at the front end of the weighing platform 3.2, and an inlet axle counter 6 is installed at the rear end of the weighing platform 3.2. The upper surfaces of the exit axle counter 5 and the inlet axle counter 6 are flush with the upper surface of the weighing platform 3.2. A wheel axle identifier 7 is installed at the rear of the dynamic weighing platform 3, and capture cameras 8 are installed on the two gantries 2.

[0024] The gantry 2 is a supporting structure spanning the weighing lane 1, used to install the capture camera 8. It can be implemented using a steel frame, and its height can be adapted to accommodate different vehicle types. The dynamic weighing platform 3 consists of a base 3.1 and a weighing platform 3.2. The base 3.1 is embedded in the lane via a concrete foundation, and the weighing platform 3.2 is connected to the base 3.1 via a weighing sensor. It can be embedded to maintain flush with the road surface. The exit axle counter 5 is an axle counting device installed at the front end of the weighing platform 3.2, used to record the number of axles leaving the platform. It can be implemented using a pressure sensor or a piezoelectric sensor. The entry axle counter 6 is an axle counting device installed at the rear end of the weighing platform 3.2, used to record the number of axles entering the platform. Working in conjunction with the exit axle counter 5, it can determine the vehicle's direction of travel. The wheel axle identifier 7 is a detection device located behind the dynamic weighing platform 3, used to identify the vehicle's axle type and number of tires. It can be implemented using pressure sensor identification technology. The snapshot camera 8 refers to the image acquisition device installed on the gantry 2. Its orientation can cover the side and top of the vehicle. Specifically, a high-speed camera can be used to achieve dynamic snapshot.

[0025] Specifically, when a vehicle enters weighing lane 1, the axle counter 6 first triggers and records the number of axles, and then the vehicle enters the dynamic weighing platform 3 for weighing. The weighing platform 3.2 collects weight data in real time through weighing sensors, while the wheel axle identifier 7 identifies the axle type behind the vehicle. When the vehicle leaves the weighing platform, the axle counter 5 triggers and records the number of axles. Combined with the triggering sequence of the entry axle counter 6, it can be determined whether the vehicle is reversing or has not fully entered the platform. The capture camera 8 on the gantry 2 simultaneously captures vehicle images from both front and rear angles, and the license plate recognition camera 4 acquires license plate information before the vehicle enters the weighing platform 3.2. The multi-source data is matched and verified by the controller to ensure that the weighing result corresponds to the vehicle's identity information.

[0026] Compared to existing technologies, traditional solutions rely on a single inductive loop coil 12 or separator to determine vehicle position, making them susceptible to electromagnetic interference or vehicle type variations. This solution, through coordinated detection by front and rear axle counters, can accurately determine the vehicle's direction of travel and whether it has fully entered the weighing platform, avoiding errors in the weighing data algorithm caused by vehicle reversing. The wheel axle identifier 7 is located behind the dynamic weighing platform 3, acquiring axle shape parameters after the vehicle's wheels pass by the identifier. The multi-angle capture of the gantry 2 structure covers the sides and top of the vehicle, compensating for blind spots in traditional side-facing capture and ensuring image data integrity.

[0027] Through the above technical solutions, this application can accurately determine the forward and backward states of a vehicle, avoiding abnormal weighing data caused by misjudgment of the driving direction; by fusing the data of the wheel axle identifier 7 and the axle counter, the accuracy of axle type recognition is improved, providing reliable input for the dynamic weighing algorithm; the collaborative work of the multi-angle capture camera 8 and the license plate recognition camera 4 realizes the monitoring and data matching of the entire vehicle driving process, ensuring the consistency between weighing information and vehicle identity.

[0028] This application further proposes to install vehicle separators 9 on both sides of the weighing lane 1, with the front and rear positions of the vehicle separators 9 located behind the weighing platform 3.2.

[0029] The vehicle separator 9 is a device used to detect when the rear of a vehicle leaves the weighing platform 3.2. It can be implemented using an infrared sensor or a laser sensor, determining whether the rear of the vehicle has completely left the weighing area by emitting and receiving light signals. The location behind the weighing platform 3.2 refers to the installation of the vehicle separator 9 behind the dynamic weighing platform 3. This can be achieved through pre-embedded installation or bracket fixing, and this location covers the critical area where the rear of the vehicle leaves the weighing platform.

[0030] Specifically, when a vehicle enters the dynamic weighing platform 3, the vehicle separator 9 monitors the rear position in real time. Once the rear of the vehicle has completely passed the weighing platform 3.2, the separator generates a status signal to confirm the end of the weighing process. Thus, the vehicle separator 9 and the axle counter of the dynamic weighing platform 3 form a collaborative detection mechanism, ensuring a strict correspondence between wheel axle data and the weighing period.

[0031] This application further proposes that the gantry 2 spans the weighing lane 1 and the opposite lane 11 located to the left of the weighing lane 1, and the capture camera 8 located on the rear gantry 2 is a side capture camera 8.1, which is located above the opposite lane 11 and facing the dynamic weighing platform 3.

[0032] The gantry 2 spanning the weighing lane 1 and the opposite lane 11 means that the gantry 2 structure simultaneously covers two adjacent lanes. This can be achieved by extending a steel frame laterally above the opposite lane 11. This design avoids setting up an independent support structure on only one side of the weighing lane 1, reducing the occupation of road space. The side-facing camera 8.1 located above the opposite lane 11 means that the camera is installed directly above the opposite lane 11. This can be achieved by fixing it to the crossbeam of the gantry 2 using a cantilever bracket. This position allows the camera to obtain an oblique shooting angle overlooking the dynamic weighing platform 3, eliminating blind spots in vehicle side monitoring.

[0033] Specifically, the transverse structure of the gantry 2 allows the side-facing capture camera 8.1 to be installed using the space above the opposite lane 11. The camera's optical axis forms a non-perpendicular angle with the vehicle's direction of travel, covering the entire area of ​​the dynamic weighing platform 3 through oblique shooting. When a vehicle enters the weighing lane 1, the side-facing capture camera 8.1 captures the vehicle's side profile and the contact status between the tires and the weighing platform from above the opposite lane 11. Combined with the frontal image from the front-facing capture camera 8, multi-dimensional monitoring data is generated. This arrangement eliminates the need for additional independent pillars on the side of the weighing lane 1, avoiding obstruction of vehicles passing through the opposite lane 11.

[0034] Through the above technical solution, this application achieves all-round monitoring of the side driving status of weighing vehicles, eliminating the visual blind spots of traditional frontal capture, and avoiding obstruction of oncoming lane 11 due to equipment installation. The oblique angle of the side capture camera 8.1 can accurately capture the contact state between the tires and the weighing platform, providing a reliable visual basis for determining whether the vehicle has fully entered the weighing area.

[0035] This application further proposes to install a second capture camera 10 on the outside of the weighing lane 1, with the second capture camera 10 facing the rear of the dynamic weighing platform 3, and the second capture camera 10 and the side capture camera 8.1 located on opposite sides of the weighing lane 1.

[0036] The second capture camera 10 refers to a camera device installed on the outside of the weighing lane 1. Specifically, it can be a high-definition camera with an adjustable-angle bracket, used to supplement the monitoring view of the rear and sides of the vehicle. The rear position of the dynamic weighing platform 3 refers to the rear third of the dynamic weighing platform 3 along the vehicle's direction of travel. This can be achieved by calibrating the rear boundary of the dynamic weighing platform 3 as a reference point; this area corresponds to the critical position when the rear of the vehicle is completely inside the weighing platform. The opposite sides refer to the symmetrical distribution of cameras on the left and right sides of the weighing lane 1. This can be achieved by symmetrically installing camera devices on both sides of the lane, forming a two-way, overlapping shooting layout.

[0037] Specifically, the lens of the second capture camera 10 faces the rear end of the dynamic weighing platform 3, enabling it to capture images of the vehicle's rear end fully entering the platform. When the vehicle enters the weighing area, the side capture camera 8.1 captures the vehicle's side profile from one side of the lane, while the second capture camera 10 captures images of the vehicle's rear end and the other side from the other side of the lane. The shooting ranges of the two cameras overlap in the rear area of ​​the dynamic weighing platform 3, eliminating blind spots caused by vehicle obstruction or limited viewing angle when shooting from one side. For example, when the vehicle has a towing structure or a complex axle distribution, bidirectional shooting can simultaneously record the axle positions and tire counts on both sides of the vehicle, avoiding misjudgments of axle counts due to a lack of viewing angle from one side.

[0038] Through the above technical solution, this application can eliminate the monitoring blind spots caused by insufficient single-sided capture angle during dynamic weighing, ensuring complete image recording of the vehicle's rear and both axle positions. Multi-angle image data acquired through bidirectional shooting is cross-validated with data from the weighing sensor and axle counter, improving the accuracy of vehicle axle count recognition and weighing data matching, and avoiding misjudgments of vehicle driving status due to visual blind spots.

[0039] Understandably, in one embodiment, the axle counter 5 (exit scale), the axle counter 6 (entry scale), and the wheel axle identifier 7 are all located on the right half of the lane. The left half of the lane refers to the area on the left side of the lane width, which occupies 50% of the lane width in the direction of vehicle travel. This area can be specifically defined by lane markings or physical barriers. By concentrating the detection equipment in this area, the detection coverage is reduced.

[0040] Understandably, in another embodiment, the axle counter 5, the axle counter 6, and the wheel axle identifier 7 are all located on the left side of the lane.

[0041] Specifically, when a vehicle travels along the lane, its left axle sequentially triggers the ingress axle counter 6, the dynamic weighing platform 3, and the egress axle counter 5, while the axle identifier 7 simultaneously collects image data of the left axle. Because the left and right axles of a vehicle are symmetrical, only the left or right half of the axles needs to be detected to deduce the total number and distribution of all axles. By concentrating the detection equipment on the left or right half of the lane, the detection area is reduced to half that of the traditional double-sided layout, thereby reducing equipment installation space and wiring length.

[0042] Compared to existing technologies, traditional solutions require axle counters and wheel axle identifiers 7 to be placed on both sides of the lane, doubling the number of devices and occupying more lateral space. This solution utilizes the symmetrical characteristics of wheel axles, requiring only single-side detection to meet data collection needs, significantly reducing space occupancy and hardware costs while ensuring detection accuracy.

[0043] This application further proposes that an inductive loop 12 is installed on the weighing lane 1 behind the dynamic weighing platform 3.

[0044] The inductive loop 12 refers to an electromagnetic induction device buried under the road surface. It can be implemented using a combination of a loop coil conductor and a signal detection circuit, triggering a detection signal based on the change in electromagnetic field caused by the passing of a vehicle's metal parts. This device is positioned in the lane area behind the dynamic weighing platform 3 to capture the dynamic position of the vehicle's rear as it leaves the platform. "Behind the dynamic weighing platform 3" refers to the area extending in the direction of travel after the vehicle leaves the weighing platform 3.2, specifically within 0.5-2 meters of the end of the weighing platform 3.2. This location avoids electromagnetic interference with the weighing sensor while ensuring that the detection is triggered only after the rear of the vehicle has completely passed the weighing platform 3.2.

[0045] Specifically, when a vehicle passes the dynamic weighing platform 3, the wheel axle identifier 7 works in conjunction with the axle counter to record the number of axles. The inductive loop coil 12 generates dynamic timing data indicating that the vehicle has completely left the platform by detecting electromagnetic disturbance signals generated by the metal components at the rear of the vehicle. This eliminates detection errors caused by differences in vehicle chassis height or tire material.

[0046] This application further proposes that the base 3.1 is installed on the weighing lane 1 through a concrete foundation, and a weighing sensor is provided at the connection between the weighing platform 3.2 and the base 3.1. The output axle counter 5 and the input axle counter 6 are located above the weighing sensor.

[0047] The concrete foundation refers to the fixed base into which the base 3.1 is embedded, formed by pouring concrete. Specifically, C40 strength grade concrete with embedded steel bars can be used. Its function is to provide rigid support for the weighing platform 3.2, preventing displacement of the base 3.1 due to vehicle traffic. The load cell is a pressure sensing device located at the connection between the weighing platform 3.2 and the base 3.1, specifically a resistance strain gauge load cell. Its function is to directly convert the vehicle weight into an electrical signal, avoiding measurement errors introduced by mechanical deformation. The axle counter, positioned above the load cell, refers to the device that detects the passage of vehicle axles, installed above the sensor's bearing surface. Specifically, a pressure sensor can be installed flush with the surface of the weighing platform 3.2. Its function is to simultaneously acquire weight data at the corresponding location when detecting the axle's condition.

[0048] Specifically, the concrete foundation is welded to the base 3.1 with pre-embedded steel bars to form an integral structure. When a large vehicle drives onto the weighing platform 3.2, the vehicle load is transferred to the base 3.1 through the weighing platform 3.2 and then evenly distributed to the foundation by the concrete foundation, thereby suppressing structural deformation caused by vibration. Weighing sensors are arranged at the four corners of the weighing platform 3.2 at the connection points with the base 3.1. When the vehicle axle passes over the axle counter, the axle counter trigger signal and the weight data collected by the weighing sensors form a spatial correspondence, avoiding axle load matching deviation caused by the separate installation of the sensors and the axle counter.

[0049] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A heavy-duty transport weighing system, comprising two gantries installed at intervals above a weighing lane, a dynamic weighing platform disposed between the gantries, and a license plate recognition camera disposed on one side of the weighing lane and in front of the weighing platform, wherein the dynamic weighing platform comprises a base and a weighing platform mounted on the base, characterized in that, The weighing platform is equipped with an output axle counter at the front end and an input axle counter at the rear end. The upper surfaces of the output and input axle counters are flush with the upper surface of the weighing platform. A wheel axle identifier is installed behind the dynamic weighing platform, and two gantry frames are equipped with capture cameras.

2. The oversized cargo transportation weighing system according to claim 1, characterized in that, Vehicle separators are installed on both sides of the weighing lane, with the front and rear positions of the vehicle separators located behind the weighing platform.

3. The oversized cargo transportation weighing system according to claim 1, characterized in that, The gantry spans the weighing lane and the opposite lane located to the left of the weighing lane. The capture camera on the rear gantry is a side-facing capture camera, which is located above the opposite lane and faces the dynamic weighing platform.

4. The oversized cargo transportation weighing system according to claim 3, characterized in that, A second capture camera is installed on the outer side of the weighing lane, facing the rear of the dynamic weighing platform, and the second capture camera and the side capture camera are located on opposite sides of the weighing lane.

5. A heavy-duty transport weighing system according to any one of claims 1 to 4, characterized in that, The axle counters for exiting the weighbridge, the axle counters for entering the weighbridge, and the wheel axle identifier are all located on the right side of the lane.

6. A heavy-duty transport weighing system according to any one of claims 1 to 4, characterized in that, Inductive loops are installed on the weighing lane behind the dynamic weighing platform.

7. A heavy-duty transport weighing system according to any one of claims 1 to 4, characterized in that, The base is embedded in the weighing lane through a concrete foundation. A weighing sensor is installed at the connection between the weighing platform and the base. The output axle counter and the input axle counter are located above the weighing sensor.

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