【Ndustrial Design Product Development】 New vehicle radio frequency identification equipment
A new generation of vehicle radio frequency identification system based on short-range radio frequency communication technology. This system is a wireless identification system based on the principle of digital communication and using integrated single-chip narrowband UHF transceiver. The basic working principle and hardware design idea of the radio frequency identification system are described, and the flow chart of the program design scheme is given. From the perspective of low power consumption, efficient identification and practicality, the RFID tag suitable for vehicle is designed. Under the condition of complex road conditions (busy road), it can achieve effective recognition within 300m, and under the condition of sight distance, it can achieve effective recognition within 500m.
A new generation of vehicle radio frequency identification system based on short-range radio frequency communication technology. The system consists of a short-range wireless communication vehicle unit and a base station system to form a point-to-multipoint wireless identification system, which can be used for vehicle identification and intelligent guidance within the coverage of the base station.
The system hardware is mainly composed of control part, RF part and external extended application part. With low-power MCU as the control unit, integrated single-chip narrowband UHF transceiver, built-in optimized design antenna, and advanced photovoltaic battery power supply, realize high-integration short-range wireless identification radio frequency terminal (OBU). According to the actual application requirements, many analog circuits, digital circuits and microprocessors are integrated on one chip to provide a "single chip" solution.
The power supply part of the system is powered by a combination of photovoltaic battery as the daily work power supply and lithium-ion battery as the backup battery. The solar energy is used to charge the energy storage battery under the condition of good illumination, and a certain amount of illumination time can basically meet the daily work needs of the OBU, which greatly extends the service life of the backup battery and the working life of the OBU.
The program adopts modular design and is written in C language. It is mainly composed of four parts: main program module, communication program module, peripheral circuit processing module, interrupt and memory module. The communication process between OBU and BSS is divided into three steps: establishing links, exchanging information and releasing links.
The RF chip is highly integrated, which can achieve small size, low power consumption and easy installation, and is applicable to the construction of vehicle parking free monitoring and monitoring system.