Application of RFID technology in truck scale weighing management

With the increasing number of urban construction fields, coal, cement, petrochemical, grain, feed, metallurgy, chemical industry and all industries that require electronic scale measurement are constantly being optimized. The scale room is often far away from the management department, and the work of scale operators cannot be obtained. For effective monitoring, relying on a large amount of manual filling in forms and calculations is prone to errors. As the scale and production capacity of the management department continue to expand, the importance and many problems of weighing management have become particularly prominent. RFID technology is applied in truck scale weighing management.

The fully automatic intelligent truck scale weighing system integrates long-range RFID technology, automatic vehicle number recognition system, automatic voice command system, weighing image instant capture system, traffic light control system, infrared anti-cheating system, gate control system, and remote supervision system. , an unattended weighing system that integrates software middleware with third-party application software. In the whole process of weighing, automatic and reliable collection of measurement data, automatic discrimination, automatic command, automatic processing, and automatic control are achieved to minimize the disadvantages and work intensity caused by manual operations and improve the integration and information of the system. level of automation. For the management department, they can understand the current production and logistics status through the summary reports in the system; for the financial settlement department, they can get clear and accurate settlement reports; for the warehouse management department, they can understand their own receipt and delivery of goods. Situation etc. These report data can be consulted at any time, so it also strengthens management consistency, shortens decision-makers' response time to production, improves management efficiency, reduces operating costs, and promotes enterprise information management.

There are protection measures for all data Files, and the creation, modification, deletion and query of data should be authorized to prevent illegal operations on data; the modification and deletion of original data are recorded in log files for future verification.

High reliability design:

Product design must follow the principle of 24-hour uninterrupted operation; carry out thoughtful electromagnetic interference protection and electrostatic protection; adopt modular design, and the connection between each module is simple and consistent; data communication adopts international standards, and error control is rigorous; the control machine The internal power supply is DC/DC isolated to improve the anti-interference ability of the product and the stability of the system;

Strong environmental adaptability:

The product must use industrial-grade devices to adapt to harsh and complex working environments; the structural parts must be strong and firm; the service life must be no less than five years, with complete rust-proof and explosion-proof treatment; ventilation, heat dissipation, earthquake resistance, and moisture-proof measures must be strict and effective, and the system can support the three Level lightning protection function, good defense ability against induction lightning;

Equipment quality is reliable:

Equipment procurement, manufacturing, testing, installation and commissioning all follow strict quality management and control requirements;

Set up a metered transportation vehicle dispatch center. The center can be set up in an office and needs to be connected to the factory network. The center is equipped with a card issuance system. Drivers of metered transport vehicles must receive an RFID Card with specific information written into it by the card issuance system of the metered transport vehicle dispatch center before they can start metering and transporting work.

The measurement transportation procedures are as follows:

1. When an empty truck enters the factory, the transport vehicle has an RFID card. The card allows entry into the factory and is released after adding the identification bit.

2. When an empty truck enters the weighbridge measurement area, an RFID Antenna, a barrier gate, and a license plate recognition system are set up in this area. Information is read and written here: the vehicle license plate information, empty truck weight, and the identification bit are written. .

3. The empty truck enters the loading area and loads the goods. Set up an RFID antenna in this area to read and write information: record the vehicle loading time, item information, and write the identification bit.

4. After loading the goods in the loading area, drive towards the weighbridge. There is a gate at the entrance of the weighbridge. Its function is to open the gate when there is no vehicle on the weighbridge and a fully loaded truck enters the weighing waiting area of the weighbridge and meets the opening conditions;

5. Set up an RFID antenna, a barrier gate, and a license plate recognition system at the exit of the weighbridge. After the weighbridge completes the weighing process, the license plate recognition system compares the vehicle license plate with the RFID card to record whether the license plate is correct. If it is correct, adjust the license plate recognition system. The empty weight of the vehicle is calculated by calculating the actual loaded weight of the vehicle. The RFID antenna writes the vehicle weighing information and weighing time. At the same time, the vehicle weighing information is transmitted back to the third-party management system (such as ERP, automatic deduction system, etc.) and Write the identification bit and then open the gate to release.

6. Fully loaded trucks leave the factory through the factory gate. The RFID antenna here reads the vehicle information to determine whether to let it pass.

At present, the RFID used in unattended truck scale weighing systems are all passive RFID products, and the mainstream is ultra-high frequency operating frequency between 900-960MHZ. RFID technology enables long-distance identification without card swiping and unattended operation. When the vehicle is parked on the scale, the weighing software automatically collects vehicle information through the RFID device. The weighing software begins to determine the weighing data until the weighing data is stable. Then capture the photo and save the gross weight or tare weight, capture the photo with the camera and then print the document, release the vehicle, and then start the next vehicle. When a vehicle has a tare weight for the second time, the software automatically calls up the vehicle information collection. After the software determines that the vehicle is stable, it starts to capture tare weight photos, saves the weight, and then combines it with the data from the first gross weight test. Record, calculate the net weight, and print the receipt. In this way, the gross weight, tare weight, and net weight data of the vehicle are saved in the computer, as well as the photos of the gross weight, tare weight, and the driver's card number. The card number and the vehicle number correspond one to one. RFID unattended truck scale weighing systems are widely used in power plants, coal mines, non-ferrous metal mines, garbage dumps, cargo stations, muck and other scenarios.

RFID smart weighing uses computers, RFID automatic identification technology, and automated identification control. With the rapid development of the logistics and warehousing industry, the effective management of goods sent and received has become particularly important. The fully automatic intelligent truck scale weighing system is an unattended weighing platform that uses RFID technology to quickly and automatically identify weighing vehicle information, improve identification efficiency, and alleviate the phenomenon of vehicles queuing for weighing. RFID technology enables long-distance automatic identification, accurate data, and is less affected by the environment, improving work efficiency and improving the level of enterprise information management.