Unattended weighing system and method thereof
By integrating a central control and data processing module with a multi-module collaborative unattended weighing system, the problems of poor adaptability, outdated interface, and cheating risk in existing systems have been solved, achieving efficient, reliable, and multi-scenario adaptable weighing management, and improving data accuracy and user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN HENGZHIDA ELECTRONICS CO LTD
- Filing Date
- 2026-03-02
- Publication Date
- 2026-06-09
AI Technical Summary
Existing unattended weighing systems suffer from poor adaptability, outdated interfaces, lack of monitoring functions, simplistic processes, and are prone to errors and cheating risks, failing to meet diverse weighing management needs.
The system employs a central control and data processing module to coordinate the collaborative work of various modules. It combines automatic vehicle identification, weighing sensors, vehicle positioning and behavior monitoring, human-machine interaction and network communication modules to achieve multi-scenario adaptation, anti-cheating and data traceability. It adopts a modern interface design and multi-threaded parallel processing.
Improve weighing efficiency, eliminate cheating, reduce labor costs, ensure accurate and traceable data, optimize user experience, support multiple devices and business scenarios, and have strong adaptability.
Smart Images
Figure CN122171000A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of weighing technology, specifically to an unattended weighing system and method. Background Technology
[0002] Unattended weighing systems are widely used in industries, logistics, and mining to automate vehicle weighing and reduce manual intervention. However, existing unattended weighing systems are relatively simple in design, with functions concentrated in a computer client. They suffer from poor adaptability to various weighbridge scenarios, different equipment models, and diverse communication methods, sometimes even being completely unsupported, thus limiting system versatility. Furthermore, existing systems often feature outdated interfaces, illogical module planning, and a lack of real-time monitoring, resulting in poor overall presentation and a subpar user experience.
[0003] Furthermore, traditional unattended weighing systems only support simple weighing processes and lack effective vehicle positioning verification and anti-cheating mechanisms. This makes them prone to situations such as vehicles not being fully on the scale or human intervention in the weighing process, resulting in significant errors in weight data and affecting data accuracy. Moreover, existing systems are mostly designed for a single process, which cannot adapt to the needs of different business scenarios, has poor scalability, and is difficult to meet the diverse weighing management needs of enterprises. Summary of the Invention
[0004] This invention aims to solve the problems of poor adaptability, outdated interface, lack of monitoring function, simple process, and easy generation of errors and cheating risks in existing unattended weighing systems. It provides an unattended weighing system and method with rich functions, high reliability, optimized interface, support for multiple scenarios and multiple devices, anti-cheating capabilities, and traceable data.
[0005] To solve the above-mentioned technical problems, the present invention provides the following solution: An unattended weighing system of the present invention includes: The central control and data processing module coordinates the collaborative work of various modules, and performs weighing process control, data verification, and anti-cheating logic judgment. The vehicle automatic identification module is connected to the central control and data processing module. The vehicle automatic identification module has a dual identification module, which is used to verify the vehicle identity twice, read the vehicle's unique ID and bind the license plate information, the unit information, and the cargo type information. The weighing sensor and instrument module is connected to the central control and data processing module. The weighing sensor and instrument module includes a high-precision weighing sensor, a weight transmitter, and a weighing instrument. The high-precision weighing sensor is installed below the weighbridge and converts the vehicle weight into an electrical signal. After being amplified and filtered by the weight transmitter, the weighing instrument calculates and displays the weight value. The digital weight data is then sent to the central control and data processing module through a communication protocol to accurately collect weight data. The vehicle positioning and behavior monitoring module is connected to the central control and data processing module. The vehicle positioning and behavior monitoring module includes radar, infrared grating and high-definition monitoring camera. The infrared grating detects whether the vehicle is completely stopped in the effective area of the weighbridge, and the ground induction coil detects the vehicle's entry and exit from the weighbridge, triggering the start and stop of the weighing process. The high-definition camera monitors the vehicle's weighing behavior in real time, and simultaneously collects photos of the vehicle's front and rear license plates. The detected signals are transmitted to the central control and data processing module in real time for process verification. The human-machine interaction and command module is connected to the central control and data processing module. This human-machine interaction and command module includes an outdoor LED display screen, a voice broadcaster, and an intercom button. It receives commands issued by the central control and data processing module, displays vehicle information, weight data, and operation instructions on the LED screen, and provides voice prompts to guide the driver to operate the vehicle correctly. The intercom button is used for real-time communication between the driver and the monitoring center in case of abnormal situations. The network communication and data service module, which is connected to the central control and data processing module, includes a switch, a router, and a database server. It constructs a local area network to connect various devices, stores weighing records, vehicle information, and image data in the database, and synchronizes the data to the enterprise's internal platform.
[0006] Furthermore, the central control and data processing module adopts an industrial control computer or an embedded controller, which is a module developed based on the .NET 8.0 framework and supports multi-threaded parallel processing.
[0007] Furthermore, the automatic vehicle identification module includes an RFID reader / writer and a high-definition license plate recognition camera. The RFID reader / writer is matched with an RFID electronic tag, which is affixed to the vehicle's windshield. The information bound to the vehicle includes at least a unique ID, license plate number, company information, and approved load information. When the vehicle approaches the weighbridge, the RFID reader / writer automatically reads the tag information, while the license plate recognition camera captures the license plate and extracts the number. The two sets of data are transmitted via Ethernet to the central control and data processing module, which compares and verifies the data to accurately identify the vehicle's identity.
[0008] Furthermore, the communication protocol includes either RS-232 / 485 or TCP / IP.
[0009] Furthermore, in the vehicle positioning and behavior monitoring module, infrared gratings are installed at both ends of the weighbridge to form an infrared detection area. When the vehicle fully enters the weighbridge, the infrared gratings are unobstructed and send a position signal to the central control unit. The high-definition surveillance camera supports real-time video acquisition and capture. It uses video analysis algorithms to detect abnormal behaviors, including at least personnel getting off the vehicle and vehicle movement. Once an abnormal behavior is detected, it immediately sends an alarm signal to the central control and data processing module, suspends the weighing process, and triggers a voice alarm.
[0010] Furthermore, in the human-machine interaction and command module: the LED display screen is an outdoor single red screen; the voice broadcaster is a voice broadcaster whose voice prompts can be customized through the background system; the intercom button is a waterproof industrial intercom terminal, which connects to the monitoring center intercom to enable real-time communication between the driver and the monitoring center.
[0011] Furthermore, the database is a storage-type MySQL database, and the enterprise internal platform includes either ERP or TMS systems.
[0012] The present invention provides an unattended weighing method, which is applied to the aforementioned unattended weighing system.
[0013] Furthermore, the unattended weighing method includes the following steps: S1, when a vehicle enters the recognition area, the license plate recognition device captures the license plate, and the system obtains the recognition data and verifies it with the vehicle information and order information in the background database to determine whether it is a vehicle registered in the system and whether there is a corresponding order. S2, after the verification is passed, the central control and data processing module controls the barrier gate to lift, and at the same time issues a reminder to the driver to put the vehicle on the weighbridge through the voice broadcaster, LED display and traffic lights. S3, during the process of a vehicle being put on the weighbridge, the system collects the vehicle's position information in real time through the grating signals at both ends of the weighbridge to determine the vehicle's weighbridge status and direction. S4. When the vehicle is fully on the weighbridge and the light grids at both ends of the weighbridge are unobstructed, the system controls the barrier gate to fall and reminds the driver to prepare for weighing via LED screen and voice broadcast. S5: The weighing sensor and instrument module collect the weighbridge weight data in real time, determine whether the weight exceeds the minimum threshold and whether it is stable. After obtaining the stable weight, the high-definition camera captures a photo of the vehicle and binds and saves it with the current weighing data. S6: After weighing is completed, the system controls the barrier gate to lift and reminds the driver to get off the scale via voice, LED screen and traffic lights; S7: After completing two weighings, the system compares the two weighing data, uses the lighter weight as the tare weight and the heavier weight as the gross weight, generates a weighing record, and synchronizes it to the backend database.
[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention improves weighing efficiency: The fully automated weighing process replaces manual operation, reducing weighing time to 10 seconds, significantly improving vehicle turnover rate, and is suitable for scenarios with high traffic volume; 2. This invention eliminates cheating: Through multiple technical means such as infrared positioning, video monitoring, and data verification, it eliminates the risk of human fraud during the weighing process and ensures that the weight data is true and reliable; 3. This invention reduces labor costs: It enables one person to manage multiple weighbridges, with centralized monitoring in the center, reducing the need for on-site operators and significantly reducing labor input; 4. The data in this invention is accurate and traceable: the entire process of data is collected and stored in real time, including vehicle information, weight data, image data and timestamps, ensuring the real-time nature, accuracy and traceability of the data, which facilitates subsequent query and statistics; 5. This invention has strong adaptability and scalability: it supports multiple devices, communication protocols and business scenarios, its modular design facilitates integration with existing enterprise systems, and its functions can be expanded according to needs, making it widely applicable; 6. This invention optimizes user experience: modern interface design, reasonable module planning, real-time monitoring screen and clear human-computer interaction guidance enhance the ease of operation and visual experience. Attached Figure Description
[0015] Figure 1 This is a structural diagram of each module of the unattended weighing system of the present invention.
[0016] Figure 2 This is a flowchart illustrating the workflow of the unattended weighing system of the present invention.
[0017] Figure 3 This is a flowchart of the unattended weighing method of the present invention. Detailed Implementation
[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention. Obviously, the embodiments described in this invention 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.
[0019] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0020] Example 1: The specific structure of the present invention is as follows: The present invention provides an unattended weighing system, comprising a client control system and a back-end web management system, which achieve data interaction and collaborative work through network communication.
[0021] The backend web management system is built using a combination of Spring Boot, Spring Security, MyBatis, Jwt, Vue, and Element Plus technologies. It is used for role and permission management, business data processing, and business configuration. It covers functions such as homepage system introduction, user and role management, menu permission allocation, goods, enterprise and vehicle information management, order processing, weighing details statistics, parameter configuration, dictionary table maintenance, and notification and announcement publishing, realizing data storage, display, and user interaction.
[0022] The client control system adopts a combination of .NET 8.0 and SQLSugar frameworks, and uses WPF for interface development. It is responsible for the control of the weighbridge equipment and has functions such as equipment configuration, weighbridge slip design and printing, real-time logging of weighing, automatic and manual weighing switching, camera monitoring display, on-site vehicle management, display of today's weighed vehicle data and real-time weight display. Data interaction is achieved through SQLSugar, and it connects to various models of equipment through serial port, TCP and SDK.
[0023] The unattended weighing system of the present invention supports multiple weighing modes, including weighing before identification, identification before weighing, bidirectional identification, single-item identification, unidirectional weighing and weighing, and bidirectional weighing and weighing modes; it also supports multiple business scenarios, covering scenarios with orders, scenarios without orders, scenarios with card readers, and scenarios without card readers.
[0024] Please refer to the appendix. Figure 1-2 The unattended weighing system of the present invention further includes multiple functional modules, including a central control and data processing module, and a vehicle automatic identification module, a weighing sensor and instrument module, a vehicle positioning and behavior monitoring module, a human-machine interaction and command module, a network communication and data service module, and a network communication and data service module, all of which are signal-connected to the central control and data processing module. Each module communicates bidirectionally with the central control unit, forming a distributed collaborative system.
[0025] The central control and data processing module coordinates the collaborative work of various modules, performing weighing process control, data verification, and anti-cheating logic judgment. The central control and data processing module adopts an industrial control computer or embedded controller, which is a module developed based on the .NET 8.0 framework and supports multi-threaded parallel processing.
[0026] The automatic vehicle identification module has a dual identification module for dual verification of vehicle identity. This module reads the vehicle's unique ID and binds it to the license plate information, the company information, and the cargo type information. The automatic vehicle identification module has an RFID reader and a high-definition license plate recognition camera. The RFID reader is matched with an RFID electronic tag, which is affixed to the vehicle's windshield. The information bound to the vehicle includes at least the unique ID, license plate number, company information, and approved load information. When the vehicle approaches the weighbridge, the RFID reader automatically reads the tag information, and at the same time, the license plate recognition camera captures the license plate and extracts the number. The two sets of data are transmitted via Ethernet to the central control and data processing module, which compares and verifies the data to accurately identify the vehicle's identity.
[0027] The weighing sensor and instrument module includes a high-precision weighing sensor, a weight transmitter, and a weighing instrument. The high-precision weighing sensor is installed below the weighbridge and converts the vehicle weight into an electrical signal. After being amplified and filtered by the weight transmitter, the weighing instrument calculates and displays the weight value. The digital weight data is then sent to the central control and data processing module via a communication protocol for accurate weight data acquisition. The communication protocol includes either RS-232 / 485 or TCP / IP. The high-precision weighing sensor is a high-precision strain gauge type, and its quantity is configured according to the weighbridge specifications. It is installed at the load-bearing point of the weighbridge. The weight transmitter amplifies and filters the weak electrical signal output by the sensor, converting it into a standard current signal. The weighing instrument receives the current signal and calculates the weight value, transmitting the digital weight data to the central control and data processing module via an RS-485 interface.
[0028] The vehicle positioning and behavior monitoring module includes radar, an infrared grating, and a high-definition monitoring camera. The infrared grating detects whether the vehicle is completely stopped within the effective area of the weighbridge, and the inductive loop detects the vehicle's entry and exit from the weighbridge, triggering the start and stop of the weighing process. The high-definition camera monitors the vehicle's weighing behavior in real time, simultaneously capturing photos of the vehicle's front and rear license plates. The detected signals are transmitted in real time to the central control and data processing module for process verification. In the vehicle positioning and behavior monitoring module, the infrared grating is installed at both ends of the weighbridge to form an infrared detection area. When the vehicle is completely inside the weighbridge, the infrared grating is unobstructed and sends a position signal to the central control unit. The high-definition monitoring camera supports real-time video acquisition and capture, and uses video analysis algorithms to detect abnormal behaviors, including at least personnel getting out of the vehicle and vehicle displacement. Once abnormal behavior is detected, an alarm signal is immediately sent to the central control and data processing module, suspending the weighing process and triggering a voice alarm.
[0029] The human-machine interaction and command module includes an outdoor LED display screen, a voice broadcaster, and an intercom button. It receives commands from the central control and data processing module, displays vehicle information, weight data, and operation instructions on the LED screen, and provides simultaneous voice prompts to guide the driver in standardized operation. The intercom button is used for real-time communication between the driver and the monitoring center in case of emergencies. Within the human-machine interaction and command module: the LED display screen is an outdoor single-red screen; the voice broadcaster is a voice prompt device whose content can be customized through the backend system; the intercom button is a waterproof industrial intercom terminal, which connects to the monitoring center's intercom to enable real-time communication between the driver and the monitoring center.
[0030] The network communication and data service module includes a switch, a router, and a database server. It constructs a local area network to connect various devices, storing weighing records, vehicle information, and image data in the database, while simultaneously synchronizing the data to the enterprise's internal platform. The database is a storage-based MySQL database, and the enterprise's internal platform includes either an ERP or a TMS system.
[0031] The core difference between this invention and existing technologies lies in: (1) Technical framework optimization: The client and backend systems are built using a differentiated technical framework of .net8 and java17+springboot+vue3. The interface adopts a modern design style, the modules are reasonably planned, and the user experience is improved. (2) Multi-scenario adaptation: Supports multiple devices, communication protocols, weighing modes and business scenarios, adapts to the needs of multiple weighbridges and multiple device models, and has strong versatility; (3) Anti-cheating and accuracy: Integrating infrared grating positioning, high-definition monitoring screen display and data verification mechanism to prevent situations such as vehicles not being fully weighed or human cheating, thereby improving data accuracy; (4) High efficiency and collaboration: Multi-threaded parallel processing is adopted, and each module works together to shorten the weighing time to 10 seconds and improve vehicle turnover rate; (5) Data traceability: The entire process data (including weight, vehicle information, images, and timestamps) is archived, supporting real-time query and traceability, and realizing precise data management.
[0032] like Figure 3 As shown, the present invention provides an unattended weighing method, which is applied to the aforementioned unattended weighing system.
[0033] The unattended weighing method includes the following steps: S1, when a vehicle enters the recognition area, the license plate recognition device captures the license plate, and the system obtains the recognition data and verifies it with the vehicle information and order information in the background database to determine whether it is a vehicle registered in the system and whether there is a corresponding order. S2, after the verification is passed, the central control and data processing module controls the barrier gate to lift, and at the same time issues a reminder to the driver to put the vehicle on the weighbridge through the voice broadcaster, LED display and traffic lights. S3, during the process of a vehicle being put on the weighbridge, the system collects the vehicle's position information in real time through the grating signals at both ends of the weighbridge to determine the vehicle's weighbridge status and direction. S4. When the vehicle is fully on the weighbridge and the light grids at both ends of the weighbridge are unobstructed, the system controls the barrier gate to fall and reminds the driver to prepare for weighing via LED screen and voice broadcast. S5: The weighing sensor and instrument module collect the weighbridge weight data in real time, determine whether the weight exceeds the minimum threshold and whether it is stable. After obtaining the stable weight, the high-definition camera captures a photo of the vehicle and binds and saves it with the current weighing data. S6: After weighing is completed, the system controls the barrier gate to lift and reminds the driver to get off the scale via voice, LED screen and traffic lights; S7: After completing two weighings, the system compares the two weighing data, uses the lighter weight as the tare weight and the heavier weight as the gross weight, generates a weighing record, and synchronizes it to the backend database.
[0034] Example 3: The following is a detailed explanation of the working process of the unattended weighing system of the present invention, using an order scenario and a two-way recognition weighing mode as examples: 1. Vehicle entry: When a vehicle approaches the weighbridge entrance and enters the detection range (5 meters) of the license plate recognition camera and RFID reader, the central control unit detects the vehicle through sensors and automatically activates the vehicle automatic identification module; 2. Identity and Order Verification: The RFID reader reads the vehicle's electronic tag information, and the license plate recognition camera captures the license plate and extracts the number. Both sets of data are transmitted to the central control unit. The system compares and verifies the vehicle information and order information (including goods name, receiving unit, and estimated weight) in the background database. If the verification is successful, the system proceeds to the next step. If the verification fails (e.g., the vehicle does not exist or the order does not exist), the system will prompt the driver through the LED screen and voice, prohibit the driver from weighing the vehicle, and notify the monitoring center. 3. Guided boarding: After the verification is passed, the central control unit controls the entrance gate to lift, the traffic lights to turn green, the LED screen to display "Welcome, please board the weighbridge", and the voice broadcaster to broadcast the prompts simultaneously, guiding the driver to drive the vehicle onto the weighbridge; 4. Vehicle positioning verification: During the weighing process, the infrared gratings at both ends of the weighbridge detect the vehicle's position in real time. If the vehicle is not fully on the weighbridge (the gratings are blocked), the system will prompt "Vehicle not in position, please adjust position" via voice until the vehicle is fully in the effective area of the weighbridge and the infrared gratings are unobstructed. Then, a "positioning signal" is sent to the central control unit, which will control the entrance gate to fall and the traffic lights to turn red. 5. Weight Acquisition and Stability Judgment: The central control unit sends a weight acquisition command to the weighing instrument. The weighing instrument acquires weight data in real time and transmits it to the control unit. The system determines whether the weight exceeds the minimum threshold (which can be set in the background, with a default of 50kg). At the same time, it checks whether the weight is stable (weight fluctuation ≤0.5kg for 3 consecutive seconds). After confirming stability, the current weight value is recorded. 6. Behavior monitoring and anomaly handling: High-definition surveillance cameras collect weighing videos in real time. The system detects abnormal behavior through video analysis algorithms. If personnel get off the vehicle, the vehicle moves, or external equipment interferes, an alarm is immediately triggered (voice alarm + LED screen display "Anomaly detected, weighing paused"), pausing the weighing process and notifying the monitoring center for manual intervention. The process is restarted after the anomaly is resolved; if no anomaly is detected, the process proceeds to the next step. 7. Data recording and image capture: The central control unit records the current stable weight value, binds vehicle information, order information, and weighing timestamp, and simultaneously controls the high-definition camera to capture photos of the vehicle's front and rear license plates and a panoramic photo of the weighbridge, which are then stored in association with the weighing data. 8. Guided exit from the weighbridge: After the weight is collected, the central control unit controls the exit gate to lift, the traffic lights to turn green, the LED screen to display "Weighing complete, weight: XXXkg, please exit the weighbridge", and the voice broadcast will announce simultaneously to guide the driver to drive the vehicle off the weighbridge; 9. Second Weighing and Data Calculation: After the vehicle is off the weighbridge, if it is in two-way weighing mode, the system repeats the above steps to complete the second weighing. The two weighing data are compared, the lighter weight is taken as the tare weight, and the heavier weight is taken as the gross weight. The net weight is calculated (net weight = gross weight - tare weight). 10. Certificate Generation and Release: The system generates a weighing record, including vehicle information, order information, tare weight, gross weight, net weight, weighing time, and captured photos. It automatically prints the weighbridge slip (if a printer is configured) and simultaneously pushes the electronic weighbridge slip to the driver's mobile phone (optional function). The LED screen displays the net weight data, and a voice announcement says "Weighbridge slip has been printed. Please take the slip and leave." The exit barrier remains raised, allowing the vehicle to leave. 11. Data Upload and Synchronization: The weighing record is automatically stored in the local MySQL database and simultaneously synchronized to the backend web management system and the enterprise ERP system via the network. The backend system updates the order status to "weighed" and supports remote query and statistics by management personnel.
[0035] Example 4: Replacement of some modules: (1) Identification module replacement: License plate recognition or RFID recognition module can be used alone. When used alone, the recognition accuracy is slightly lower. Combining the two can improve the recognition reliability. Alternatively, UWB positioning tags or Bluetooth beacons can be used to replace RFID tags to achieve vehicle identity binding, which is suitable for scenarios with higher positioning accuracy requirements. (2) Positioning detection alternative: Infrared gratings can be replaced by lidar or infrared beam-and-beam or diffuse reflection equipment. Lidar has higher positioning accuracy and is suitable for large weighbridge scenarios, while infrared beam-and-beam equipment has lower cost and is suitable for small and medium-sized weighbridges. (3) Central control unit replacement: PLC can be used to replace industrial control computer. PLC has strong anti-interference ability and high reliability, and is suitable for harsh industrial environments; embedded ARM controller can also be used, which has lower cost and smaller size, and is suitable for space-constrained scenarios. (4) Communication method replacement: Wired communication can be replaced by industrial Wi-Fi or 5G industrial modules, which are suitable for scenarios where wiring is difficult and the weighbridge position moves frequently, ensuring communication stability.
[0036] In summary, this invention improves weighing efficiency: the fully automated weighing process replaces manual operation, reducing weighing time to 10 seconds, significantly increasing vehicle turnover, and is suitable for scenarios with high traffic volume; This invention eliminates cheating: by using multiple technical means such as infrared positioning, video monitoring, and data verification, it eliminates the risk of human fraud during the weighing process and ensures that the weight data is true and reliable. This invention reduces labor costs: it enables one person to manage multiple weighbridges, with centralized monitoring in the center, reducing the need for on-site operators and significantly reducing labor input; This invention provides accurate and traceable data: real-time data collection and storage throughout the entire process, including vehicle information, weight data, image data, and timestamps, ensuring the real-time nature, accuracy, and traceability of the data, facilitating subsequent querying and statistics; This invention is highly adaptable and scalable: it supports multiple devices, communication protocols and business scenarios, its modular design facilitates integration with existing enterprise systems, and its functions can be expanded according to needs, making it widely applicable. This invention optimizes the user experience: a modern interface design, reasonable module planning, real-time monitoring screens, and clear human-computer interaction guidance enhance operational convenience and visual experience.
[0037] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.
Claims
1. An unattended weighing system, characterized in that, include: The central control and data processing module coordinates the collaborative work of various modules, and performs weighing process control, data verification, and anti-cheating logic judgment. The vehicle automatic identification module is connected to the central control and data processing module. The vehicle automatic identification module has a dual identification module, which is used to verify the vehicle identity twice, read the vehicle's unique ID and bind the license plate information, the unit information, and the cargo type information. The weighing sensor and instrument module is connected to the central control and data processing module. The weighing sensor and instrument module includes a high-precision weighing sensor, a weight transmitter, and a weighing instrument. The high-precision weighing sensor is installed below the weighbridge and converts the vehicle weight into an electrical signal. After being amplified and filtered by the weight transmitter, the weighing instrument calculates and displays the weight value. The digital weight data is then sent to the central control and data processing module through a communication protocol to accurately collect weight data. The vehicle positioning and behavior monitoring module is connected to the central control and data processing module. The vehicle positioning and behavior monitoring module includes radar, infrared grating and high-definition monitoring camera. The infrared grating detects whether the vehicle is completely stopped in the effective area of the weighbridge, and the ground induction coil detects the vehicle's entry and exit from the weighbridge, triggering the start and stop of the weighing process. The high-definition camera monitors the vehicle's weighing behavior in real time, and simultaneously collects photos of the vehicle's front and rear license plates. The detected signals are transmitted to the central control and data processing module in real time for process verification. The human-machine interaction and command module is connected to the central control and data processing module. This human-machine interaction and command module includes an outdoor LED display screen, a voice broadcaster, and an intercom button. It receives commands issued by the central control and data processing module, displays vehicle information, weight data, and operation instructions on the LED screen, and provides voice prompts to guide the driver to operate the vehicle correctly. The intercom button is used for real-time communication between the driver and the monitoring center in case of abnormal situations. The network communication and data service module, which is connected to the central control and data processing module, includes a switch, a router, and a database server. It constructs a local area network to connect various devices, stores weighing records, vehicle information, and image data in the database, and synchronizes the data to the enterprise's internal platform.
2. The unattended weighing system according to claim 1, characterized in that, The central control and data processing module uses an industrial control computer or embedded controller. It is a module developed based on the .NET 8.0 framework and supports multi-threaded parallel processing.
3. The unattended weighing system according to claim 1, characterized in that, The automatic vehicle identification module includes an RFID reader / writer and a high-definition license plate recognition camera. The RFID reader / writer is matched with an RFID electronic tag, which is affixed to the vehicle's windshield. The information bound to the vehicle includes at least a unique ID, license plate number, company information, and approved load information. When the vehicle approaches the weighbridge, the RFID reader / writer automatically reads the tag information, while the license plate recognition camera captures the license plate and extracts the number. The two sets of data are transmitted via Ethernet to the central control and data processing module, which compares and verifies the data to accurately identify the vehicle's identity.
4. The unattended weighing system according to claim 1, characterized in that, The communication protocol includes either RS-232 / 485 or TCP / IP.
5. The unattended weighing system according to claim 1, characterized in that, In the vehicle positioning and behavior monitoring module, infrared gratings are installed at both ends of the weighbridge to form an infrared detection area. When the vehicle fully enters the weighbridge, the infrared gratings are unobstructed and send a position signal to the central control unit. The high-definition surveillance camera supports real-time video acquisition and capture. It uses video analysis algorithms to detect abnormal behaviors, including at least personnel getting off the vehicle and vehicle movement. Once an abnormal behavior is detected, it immediately sends an alarm signal to the central control and data processing module, suspends the weighing process, and triggers a voice alarm.
6. The unattended weighing system according to claim 1, characterized in that, In the human-machine interaction and command module: the LED display screen is an outdoor single red screen; the voice broadcaster is a voice broadcaster whose voice prompts can be customized through the background system; the intercom button is a waterproof industrial intercom terminal, which connects to the monitoring center intercom to enable real-time communication between the driver and the monitoring center.
7. The unattended weighing system according to claim 1, characterized in that, The database is a storage-type MySQL database, and the enterprise internal platform includes either ERP or TMS systems.
8. An unattended weighing method, characterized in that, This unattended weighing method is applied to an unattended weighing system as described in any one of claims 1-7.
9. The unattended weighing method according to claim 8, characterized in that, The unattended weighing method includes the following steps: S1, when a vehicle enters the recognition area, the license plate recognition device captures the license plate, and the system obtains the recognition data and verifies it with the vehicle information and order information in the background database to determine whether it is a vehicle registered in the system and whether there is a corresponding order. S2, after the verification is passed, the central control and data processing module controls the barrier gate to lift, and at the same time issues a reminder to the driver to put the vehicle on the weighbridge through the voice broadcaster, LED display and traffic lights. S3, during the process of a vehicle being put on the weighbridge, the system collects the vehicle's position information in real time through the grating signals at both ends of the weighbridge to determine the vehicle's weighbridge status and direction. S4. When the vehicle is fully on the weighbridge and the light grids at both ends of the weighbridge are unobstructed, the system controls the barrier gate to fall and reminds the driver to prepare for weighing via LED screen and voice broadcast. S5: The weighing sensor and instrument module collect the weighbridge weight data in real time, determine whether the weight exceeds the minimum threshold and whether it is stable. After obtaining the stable weight, the high-definition camera captures a photo of the vehicle and binds and saves it with the current weighing data. S6: After weighing is completed, the system controls the barrier gate to lift and reminds the driver to get off the scale via voice, LED screen and traffic lights; S7: After completing two weighings, the system compares the two weighing data, uses the lighter weight as the tare weight and the heavier weight as the gross weight, generates a weighing record, and synchronizes it to the backend database.