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1. System requirements and overall construction goals
1. Requirements for safe transportation management of mining vehicles
In the coal industry, how to ensure the accurate measurement of coal, the safety of transportation, and the protection of coal in and out of the field have become an urgent problem for major coal companies to solve.
Various coal companies often have the following needs:
1) Ability to strictly manage coal stockyard transportation vehicles to ensure real-time control of the real-time status of relevant transportation vehicles inside and outside the coal stockyard and in the driving route (such as: whether it is a legal vehicle, eliminate license plate vehicles, and the system constantly tracks and records the entry of mining vehicles Field, playing time, weighing situation, whether the route of travel meets regulations, etc.).
2) Ability to monitor the operation of the ground scale (weighbridge). When coal materials are transported, a ground scale is usually used to weigh the bulk materials in a “gross-tare” method. The vehicle can be uniquely identified and automatically identified. It can automatically grasp the transportation and inventory data of materials from the management software, and at the same time, prevent illegal behaviors such as “one truck passing two times, large trucks passing by and small trucks returning to the skin”.
3) The measurement network management system can be wirelessly connected with the platform weighing system to form an intelligent management system. The automatic weighbridge automatically obtains data and feeds back to the central server from time to time, and establishes connections with procurement, inventory, and production departments to form a complete measurement terminal system, optimize the internal management process of the enterprise to the greatest extent, and increase work efficiency.
4) A remote query monitoring system can be provided, so that relevant personnel can monitor and track a certain coal material vehicle at any time through a Web browser or other methods.
2. Construction goals
Use advanced RFID radio frequency products to cooperate with IoT technology solutions to effectively manage related transportation vehicles. The ultimate goal is: to achieve an efficient and reliable management platform, to grasp the coal transportation status of mining enterprises in real time, and to improve the company’s understanding of coal transportation. To prevent man-made management loopholes and corporate property losses.
2. Overall solution
2.1 Scheme ideas
2.1.1 Use RFID technology to manage related transportation vehicles
It mainly includes the following parts:
Label activation and card issuance, and database information binding registration with corresponding vehicles.
Vehicle entry and exit recognition
Recognition of routes through weighbridges, coal yards, and key points
Carry out vehicle audits using handheld devices or vehicle-mounted devices
2.1.2 Realize local and remote management through network technology
(1) A wire network or wireless network is set up so that the network covers the operation area of the entire stockyard, and all operation data can be transmitted in real time through a fixed RFID reader. The fixed RFID reader has the functions of accepting operating instructions, confirming the accuracy of the operating location and operating materials, and returning to the actual operating status.
(2) The data interaction of the operating point is realized through the database and the computer network, which can realize the remote real-time query, statistics, and summary of the operating information of each operating point, and generate various reports.
2.2 Business Process
In response to the current shortcomings in business management, we have adopted a variety of advanced technologies, and we have proposed a new business process that can fundamentally make up for loopholes in management, optimize business processes, improve management levels, and improve work efficiency. The business process is as follows:
Figure 2-2 The whole operation process of coal transport truck
(1) Label issuance: Owners of coal transportation vehicles receive RFID electronic labels through the label issuance office of the back-end management center (divided into two situations: team issuance and on-site issuance). Transport vehicles need to provide meter number, license plate number information, vehicle type, identity information, etc., and the system enters meter number, license plate number, and driver-related information. The electronic tags equipped with vehicles will serve as the only identification information carrier for the legal transportation of minerals in the future.
(2) The first weighing when the coal transport vehicle enters the coal yard: the reader will automatically recognize whether the electronic tag in the vehicle is legal. Manually check the vehicles that have not detected the electronic tags to prevent illegal transportation vehicles from transporting coal privately; if the vehicle is detected with a legally authorized electronic tag in the vehicle, the vehicle can enter the platform for weighing, and record the vehicle’s entry time and gross weight at the same time Tare weight and other weighing data and weighing time; if an unauthorized vehicle with an electronic tag in the vehicle is detected, the reader will automatically activate the alarm device, give an alarm, and notify the relevant management personnel to deal with it until the problem is eliminated.
(3) Coal transportation vehicles enter the site for coal loading and secondary weighing: legal coal transportation vehicles enter the coal yard to load coal. After coal loading is completed, the vehicles enter the secondary weighing yard for weighing, and the reader will also record the vehicle’s entry time, Departure time, total weight of coal trucks, and coal weight; after the loading of coal on the trucks, some legal vehicles did not enter the secondary weighing yard in accordance with relevant regulations, but drove directly along the avenue. Great economic losses. After fully considering various factors, it is designed to install fixed readers or hand-held readers at the fork of the transportation road for inspection, and form the vehicle trajectory in the system for easy access (fixed equipment or After the handheld device checks the relevant legal vehicles passing here, it will be transmitted to the background through GPRS or other methods) to prevent legal coal trucks from stealing the coal resources of the country or enterprise.
(4) Vehicle inspection system
The on-board inspection system is installed in the inspection and law enforcement vehicle. Law enforcement officers can drive law enforcement vehicles to conduct vehicle inspections anywhere within the jurisdiction. Recognize license plates (automatic license plate number recognition and extraction), vehicle features (pictures), and remotely recognize RFID electronic tags. The data processing system automatically compares the physical characteristics information of the vehicle with the electronic tag information, and when the problem vehicle is found, it immediately sends out a voice and digital display alarm to prompt the law enforcement personnel to intercept; the system can detect the same direction or the same direction at a speed of 0 to 120 kilometers per hour. Reverse driving vehicles are subject to dynamic inspection, and parked vehicles can also be inspected. The effective long-distance inspection range can reach more than 200 meters. The inspection vehicles are equipped with on-board fixed readers, on-board computers, etc., powered by the on-board power supply, to conduct long-distance or short-distance inspections of vehicles on main transportation roads. Determine whether the vehicle is a legal vehicle, whether it is driving according to a predetermined route, and so on.
(5) Handheld inspection system
Figure 2-3 Hand-held inspection of coal transportation vehicles
By equipping law enforcement personnel with portable inspection equipment, it can be used to inspect slow-moving or parked vehicles. When law enforcement officers point the receiving antenna of the handheld inspection system at a suspicious vehicle, if the information displayed by the system matches the physical characteristics of the vehicle, it is a legitimate vehicle. If the system cannot receive electronic information or the received electronic information and physical characteristics If it does not match, it can be determined that the vehicle is an illegal vehicle or a problem vehicle, and the system will immediately issue an alarm; at the same time, the handheld inspection system can also be set to wirelessly connect to the nearby fixed inspection system. When the fixed inspection system finds a problem vehicle, it will immediately report Hand-held inspection system alarms and displays the vehicle information;
The system is designed flexibly, real-time online or offline.
1), optional built-in module
I When using real-time data networking, the electronic tag handset equipped with wireless communication modules uses the existing wireless communication network to communicate with the district coal vehicle supervision business processing subsystem for real-time two-way data communication (select the network to be CDMA 1X or GPRS)
II When the mobile communication network is blocked or faulty, when the data is processed offline, the electronic tag handset will conduct on-site vehicle audits through the vehicle supervision and comparison database downloaded in advance. If you encounter information that cannot be compared with the local database, you can perform an electronic business license During the on-site inspection of the data, and when returning, the USB data interface or infrared wireless interface of the handheld device equipped with the data storage module will verify the data stored in the data storage module with the coal vehicle supervision business processing subsystem.
Data offline processing method
Real-time data processing
2.3 System Architecture
Figure 2-4 System architecture
The design of the intelligent management system for mining vehicles adopts the following three-tier architecture:
The first layer: data collection, which mainly collects data information through RFID automatic identification equipment and camera systems, and monitors transportation vehicles in real time.
The second layer is network transmission, that is, through wired communication technology, wireless communication technology and network technology, the collected data is transferred to the central database; including related network equipment.
The third layer is data application processing to manage the collected data; including equipment such as the intelligent management system of mining vehicles, database servers and network servers.
2.4 System composition
The intelligent management system of mining vehicles is composed of database management subsystem, label issuance subsystem, vehicle management subsystem, weighbridge vehicle management subsystem, remote query subsystem, and measurement and settlement subsystem.
Figure 2-5 System structure diagram
2.4.1 Basic functions of the system
(1) Each transport vehicle is equipped with a tamper-proof electronic tag, that is, the vehicle’s “electronic ID card”. Vehicle electronic tags have global uniqueness, non-copyability and non-detachability.
(2) The wireless collection of information greatly improves the safety and scalability of the coal yard, reduces and eliminates the error rate of manual recording and statistics, optimizes the management process, and improves work efficiency.
(3) Real-time global monitoring of the status of mine transport vehicles inside and outside the field and the dynamic information of the coal field.
(4) Decision support: systematically efficient, fast and accurate statistical functions (such as the rapid statistics of the total amount of coal transportation, the current status of a transport vehicle and other related data) can provide the management with various data to make quick decisions
(5) Automatic reminder: Provide conditional warning reminder function for various information of transportation vehicles, transportation route designation and other information, so that relevant management department personnel can further understand the actual situation of mining transportation vehicles;
(6) Intelligent information confirmation of entrances and exits: the verification and confirmation of entrances and exits, automatic, fast, and long-distance identification, greatly improve the safety of coal transportation and can be filed for inquiries.
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