RFID mine vehicle management and intelligent weighing system

1. System Overview

A large number of mining vehicles enter and exit the mine every day, which require parking, registration, weighing and other procedures. Operators manually enter the data into the computer, which is not only time-consuming, but also has a high error rate. In addition, it is easy to breed human fraud, which is a problem. Businesses cause massive economic losses.

The mine vehicle management system combines RFID technology, electronic truck scale technology, communication technology, automatic control technology, database technology and computer network technology to automatically record the license plate number, weight information, time information, etc. of vehicles equipped with electronic tags entering and exiting, and write them The host database can effectively eliminate human errors, prevent over-balance blockage, cheating, etc., ensure the accuracy of original data collection, and reduce economic losses.

At the same time, three monitoring points are set up on the route of transporting ore, which are the loading point, the midway detection point and the unloading point. Each monitoring point has a weighing point. When the vehicle enters the weighing point, the reader is triggered to read the card, and The detailed information of the vehicle is transmitted to the PC, and the tag information is matched to check whether there is any ore loss during the transportation of the vehicle.

2. System goals

This solution carries out intelligent management for all vehicles entering the mine, requiring each vehicle entering the mine to transport ore to be issued a special label for ore transport. This special label contains the owner's name, tare weight/license plate number/ Material type/net weight/loading location/destination/printing time year, month, day and other information. Set three weighing points on the transportation route. When the mining truck passes by the truck scale and is weighed, the reader is triggered to read the card. The reader transmits the information in the vehicle tag to the host and instructs the electronic scale to transmit the vehicle weight information. The mine management system can automatically measure the weight of the ore transport through the information when the ore transport truck passes the weighing point, and can call the data in the host database at any time for query or form a report.

3. System composition

The mine vehicle management system consists of two parts: the automatic vehicle weight measurement system and the computer monitoring and management system. Among them, the automatic vehicle weight measurement system is mainly composed of weight sensors and weighing display instruments. It mainly completes functions such as weight data collection and communication with the host computer. The computer monitoring and management system consists of computers, printers, radio frequency identification systems, controllers, and channels. It is composed of gates, vehicle detectors, cameras, and video cards. It mainly completes weighing monitoring, printing weighing orders, identifying identities, generating various summary statistical reports and comprehensive query functions.

3.1. Automobile weight automatic measurement system

The system has all the functions of a general truck scale, and can automatically weigh and measure, record data and print the results of mining vehicles entering the truck scale without any supervision; when the mining vehicles enter the truck scale for weighing and measurement At the same time, the system can input the serial number, tag card number, license plate, unit, driver and other information of the mining vehicle, and can also generate and print reports.

3.2. Computer monitoring and management system

The computer monitoring and management part consists of computers, printers, radio frequency identification systems, controllers, gates, vehicle detectors, cameras, and video cards. The radio frequency identification system consists of a reader/writer, an antenna and a tag. The tag is affixed to the windshield of the car. When the reader/writer reads the tag, the camera takes a photo of the vehicle, and at the same time, the tag card number, vehicle The picture and the vehicle information are transmitted to the host and Stored in the host database.

4. System process

The mine vehicle management process is as follows:

4.1. Registration

The mine registration office first registers vehicles entering the mine. An RFID Reader is installed at the entrance. The reader can identify the special tag for transporting ore on the vehicle, and then records the tag's card number, vehicle plate number, owner's name, Information related to entry time and entry location is stored in the host database.

4.2. Invoicing

Only customers who have been issued a special label for transporting ore can go to the invoicing office of the mine to issue invoices for transporting ore.

4.3. Empty truck weighing

After issuing the invoice, the customer can drive the mining truck into the truck scale channel for weighing. The vehicle detector installed at the crossing senses that a vehicle is approaching and transmits the signal to the barrier gate and signal light in front. The barrier gate will be closed immediately and the signal light will turn red. The driver is prompted to drive slowly and the weighing instrument and reader are required to start working. After the tag on the mine truck is read by the reader, the reader antenna transmits the vehicle's information to the host computer, instructs the electronic scale to start transmitting the vehicle's weight information, and at the same time, the camera monitors whether the vehicle is parked at the designated location and captures images. After the host receives the card number and weight information, it accurately records and backs up the information, then issues an instruction to open the gate, and the ore truck drives into the mine for loading.

4.4. Loading ore

After the ore truck is weighed empty, it can be driven into the mine for loading ore.

4.5. Loading and weighing

After loading ore, the ore truck needs to drive into the truck weighing track again for weighing. The vehicle detector installed at the crossing senses that a vehicle has entered, and transmits the signal to the barrier gate and signal light in front. The barrier gate will be closed immediately, and the signal light will turn red, prompting The driver drives slowly and requires the weighing instrument and reader to start working. After the tag on the mine truck is read by the reader, the reader antenna transmits the vehicle's information to the host computer, instructs the electronic scale to start transmitting the vehicle's weight information, and at the same time, the camera monitors whether the vehicle is parked at the designated location and captures images. After the host receives the card number and weight information, it accurately records and backs up the information.

4.6. Weighing at monitoring points

There is a monitoring point on the way to transport the ore. When the vehicle passes the monitoring point, it is intelligently weighed. The reader recognizes the label attached to the vehicle and records the detailed information of the label and the weight of the vehicle. During the entire weighing process, , the vehicle travels at a speed of 10 to 20km/h.

4.7. Intelligent weighing for unloading ore

The ore truck unloads the ore after arriving at the destination. An intelligent weighing system is installed at the entrance to the destination. When the car enters the intelligent weighing system, the reader/writer reads the detailed information of the car tag and instructs the electronic scale. Start transmitting the weight information of the vehicle. When the host receives the card number and weight information, it accurately records and backs up the information. Based on multiple readings during transportation, it can be known whether there is any ore loss during transportation of the car.

5. System characteristics

Compared with previous mine vehicle management and intelligent weighing systems, the use of RFID technology for mine vehicle management has the following advantages:

   1. Information collection automation: The weighing data output by the truck scale and the electronic tag card number installed on the ore truck are processed by relevant equipment and then transmitted to the computer. The computer displays the weight of the cargo being pulled by the vehicle and stores it in the computer's database. Users can query, summarize, print and other operations as needed, thus realizing the automation of information collection.

   2. Strengthen management and eliminate favoritism and fraud: one card per car, the electronic label is affixed to the windshield of the car, and the weight measured by the weighbridge each time strictly corresponds to one card and one car. Coupled with the image capture function of the camera, it ensures that the data of the entire system is foolproof and absolutely accurate.

    3. Establish corporate image, improve work efficiency, and reduce operating costs: This system performs computer-automated network management of all truck scales (floor scales) in the entire mine. It can easily measure the weight of the mining trucks when they are empty and fully loaded, and understand the transportation in real time. The actual weight of the goods loaded on the mine car can greatly improve the work efficiency of the enterprise.

     4. Protect the security of this area and prevent illegal vehicle intrusion: This system can be integrated with the parking lot management system. Only vehicles carrying legally authorized electronic tags can enter the mine loading and weighing areas, thereby improving the security of this area.

     5. Avoid human operation loopholes. Due to the automatic data reading method, all overbalanced vehicles are automatically recorded by the computer, eliminating manual intervention, automatically recording data, and automatically verifying and releasing.

     6. Dynamic distance recognition, the recognition distance is more than 5 meters, and the vehicle speed can be up to 80km/h.

7. Simple structure, convenient debugging and installation, wide weighing range and strong adaptability

8. It can transmit information over long distances, and can perform remote control and group control, making the system truly automated and intelligent. It can also be networked with computers to automatically analyze, calculate and print data records and reports.

9. By realizing automatic measurement, the operating time of each operation link can be greatly shortened, the loading and unloading capacity of the measurement system can be improved, labor intensity can be reduced, and labor costs can be saved;

10. The data in the label is highly confidential, and the electronic label cannot be forged or copied, fundamentally eliminating copying, forgery, and cheating;

11. The automatic collection speed is fast, which can realize rapid weighing, improve the efficiency of weighing, and avoid the phenomenon of queuing and over-weighing.