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Vehicle management based on active 433MHz+125KHz dual-frequency RFID

chrispeng December 29, 2021 transport

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Foreword:

Jiangsu Tangan active 433MHz+125KHz dual-frequency RFID vehicle management is developed using RFID dual-frequency technology. The excitation distance is within 5 meters, and the identification is accurate; the buried method does not affect the appearance of the door and the passage of vehicles. Vehicle entry and exit management is more advantageous, especially for the management of military vehicles; the system is low in cost and meets the cost control requirements of enterprises

1. Project background

Video recognition currently used in vehicle management, 900MHz passive RFID, 2.4GHz activeRFIDHowever, these technologies require the installation of fixed equipment on the doorpost or the surrounding ground, which is costly and easily affects the passage of vehicles and the appearance of the door. The application of 433MHz+125KHz dual-frequency RFID technology not only has low equipment cost, but also can be buried in the ground, without affecting the appearance of the gate and vehicle traffic, and it has more advantages in the management of vehicle entry and exit with ultra-wide gates. Especially for the management of military vehicles, because the license plate is inconvenient to use video recognition, the dual-frequency RFID technology is more in line with actual needs!

2. Program features and advantages

1. Can be buried in the ground, does not affect the appearance of the gate and the passage of vehicles, and it has more advantages in the management of vehicle entry and exit with ultra-wide gates

2. Vehicles are allowed to enter and exit in parallel, and some vehicles are allowed to enter the door at the same time that some vehicles leave the door. No additional equipment is required

3. Precise control to effectively prevent other vehicles from trailing; the boundary of the excitation zone is clear, the boundary error is about 0.3 meters, and the signal excitation distance between the exciter and the electronic tag is within 5 meters

4. The electronic tag is usually in the standby state, and only emits signals when it enters the excitation zone. It has the characteristics of ultra-low power consumption, no radiation damage, and safe and reliable use.

5. 433MHz active RFID technology has the characteristics of strong penetration, strong diffraction and long transmission distance, which is suitable for various complex environments. The reader at the receiving end only needs to be placed in the nearby duty room and connected to the computer.

6. In view of the penetrability and strong diffraction of 433MHz, the electronic tag can be adapted to a variety of special vehicles at the same time, which solves the problem of the recognition rate of some special vehicles by other technologies

7. Effectively solve the shielding problem of vehicle explosion-proof metal mesh and car film in other solutions

Three, the principle of the scheme

The system consists of “monitoring computer”, “125KHz exciter”, “125KHz antenna”, “RFIDReader“And” 125KHz+433MHz dual-frequency RFID electronic tag (hereinafter referred to as electronic tag)”

1. Installation:

1) Paste the electronic label on the front windshield of the vehicle to realize one card per vehicle

2) The exciter is buried in the middle of the gate area, and the exciter antenna is buried on both sides of the entrance and exit direction of the gate. The exciter antenna is connected to the exciter through the buried wire tube. Power supply at the gate or duty room)

3) Install “RFID readers” in the gate duty room near the gate (if the gate has no duty room, just install the RFID reader near the gate and connect to the computer through the network), and the gate duty room will distribute and install management computers system software

2. Working principle:

When a vehicle with an electronic tag enters the excitation area of ​​the inner antenna or outer antenna of the 125KHz exciter, the electronic tag is awakened and sends a 433MHz radio frequency signal to the outside. The “RFID reader” obtains the electronic tag signal and transmits the information to the monitoring computer , The monitoring computer sends the barrier gate control command to control the barrier opening or closing; after the vehicle leaves, the monitoring computer automatically judges the vehicle’s entry and exit status and records it according to the wake-up sequence of the electronic tag being activated by the inner or outer antenna.

Fourth, the main function introduction

1. Application for departure

2. Vehicle approval

3. Query of vehicle in and out history records

4. Vehicle data query

5. Schematic diagram of vehicle entry and exit

Six, hardware product introduction

1. ETAG-R71 433MHz active fixed reader

2. ETAG-R73 433MHz (125KHz) active RFID incentive reader

125KHz part:

433MHz part:

3. ETAG-T75 active 433MHz (125kHz) dual-frequency RFID excitation tag

433MHz part:

125KHz part:

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