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1. Project background
The postal unit hopes to implement real-time and effective management of the unit’s vehicle entry and exit through the implementation of intelligent vehicle management technology. In addition, stricter monitoring and management of foreign vehicles entering and exiting the postal unit will be carried out.
2. The problems faced
It is hoped that the fixed vehicles of the unit can enter and exit the unit gate more conveniently and quickly, while at the same time implementing strict monitoring and management of the vehicles.
3. Overview of Weishen Intelligent Vehicle Management Solution
This system uses advanced RFID technology combined with the vehicle barrier management system to provide an independent and uninterrupted data collection system to achieve the requirements for the automatic inspection and release management of the internal vehicle traffic of the postal unit.
Write vehicle information into electronic tags placed in the car or on the windshield. When a vehicle with an electronic tag passes through the lane controlled by the reader, the reader automatically obtains the information of the passing vehicle in a non-contact, long-distance reading manner, and automatically registers the passing vehicle, whether to release, and charges, etc. deal with.
System composition
Weishen’s vehicle intelligent management system involves card issuance, data collection, information processing, and barrier systems.
Card issuance
For a fixed vehicle in a postal unit, the key data of the vehicle, including the vehicle itself and its own information, are written into the electronic label card through the card issuing device. After the writing is completed, the card is fixed on the vehicle body or pasted on the window glass.
For vehicles that need to enter and exit temporarily, the security will issue a low-frequency card for temporary release on the spot.
data collection
When the vehicle passes, the data collection system includes the collection of data in the radio frequency card by the RFID reader and the collection of license plate information by the license plate video recognition system.
Information processing
The central processing computer analyzes and processes the collected data. This includes comparing the new data with the original data in the database. Finally, the corresponding instructions are given.
Barrier gate system
It is composed of a set of hardware equipment such as a metal car stopper, a channel controller, a vehicle detector, a central processing unit, and a ground sensing coil. Finally realize the prohibition and release of vehicles.
Overall system configuration diagram
Case project real picture
4. Design plan of postal unit vehicle management system
An Introduction
Two systems, the radio frequency ID recognition system and the manual video license plate recognition system, are used to simultaneously detect the legal identity of the vehicle. Eventually, the purpose of legally-identified vehicles entering the unit without having to stop and getting out of the unit with the judgement of the guards is realized.
work process
Part of the vehicle entrance process
Temporary vehicle
When the car enters the entrance lane of the parking lot, the ground-induction coil located under the lane detects the vehicle. At this time, the guard judges whether to put in the unit according to the identity of the person in the vehicle, and if it is confirmed that the vehicle can be released, a short-distance radio frequency card will be issued. When swiping the card, the entrance camera is automatically activated to record an image of the vehicle, and according to the corresponding card number, it is stored in the computer hard disk of the gate management office. After the driver takes the card, the automatic barrier will raise the railing to let the vehicle pass, and the vehicle will automatically lower the railing after passing the vehicle detection coil.
Fixed card vehicle
When a fixed-card vehicle enters the area covered by the entrance antenna of the RFID reader in the entrance lane of the postal unit, the RFID reader reads the relevant information of the electronic tag installed on the vehicle and uploads the data to the central computer. When the data is verified to be valid and correct, the automatic barrier will raise the railing, and at the same time automatically activate the entrance camera to record an image of the vehicle, and store it in the computer hard disk of the gate management office according to the corresponding card number. The vehicle can enter the unit without stopping; if the collected electronic tag data cannot match the original data in the database, the blocking lever will not be lifted, and the door guard is required to check whether there is any problem with the incoming vehicle.
Part of the process of vehicle export
Temporary vehicle
When the temporary vehicle is about to drive out of the unit, at the exit, the driver handed the non-contact smart card to the guard. The guard swayed near the inductive card reader. According to the corresponding card number, it was stored in the computer hard disk of the central management office. The computer recorded according to the smart card. Automatically calculate the parking time to determine whether to charge. The guard checks the photo of the incoming vehicle on the computer to confirm that the entry and exit are the same vehicle and charge a fee. Through software control, the barrier of the barrier is raised. After the vehicle passes the vehicle detection loop under the lane, the railing automatically drops, and the central computer records the vehicle information in the database for inspection.
Fixed card vehicle
When the fixed card vehicle is ready to leave the unit, when the vehicle enters the area covered by the RFID equipment exit antenna of the exit lane of the postal unit, the RFID reader reads the relevant information of the card, and the data is uploaded to the central computer for verification. The guard compares the photo of the car in the database with the actual departure. After the system and the guard detect the vehicle, there is no problem. Control to raise the gear lever and the vehicle drives out of the unit; if there is RFID collected data that cannot match the original data in the database or the photos in the database do not match the actual vehicle, the doorman is required to check whether there is any problem with the vehicle.
V. Weishen Vehicle Access Management System Configuration and Introduction to Key Equipment
1) Configuration scheme one
The data collection function is realized by two 433M single-antenna active readers and an automatic license plate radio frequency identification system. The antennas of the two RFID readers are one for the outside and the other for the inside. Judge the direction of the car by analyzing the reader number of the tag in the car. The background computer simultaneously processes and analyzes the vehicle data collected by the two acquisition systems.
Reader
Description specifications
Radiated power 3dB
Multiple label processing capacity is greater than 100 at the same time
Reading speed read more than 50 per second
Working frequency 433MHz
Host communication RS232, 485 bus, or wireless
The label reading range is 1-15m, depending on the sensitivity setting of the reader
Signal strength can penetrate non-metallic substances
Power 12V DC
Working temperature -35℃ to +70℃
Storage temperature -40℃ to +85℃
Working humidity 90%
Size 114mm*84mm*20mm
Weight 200G
Active tag Tag:
Description specifications
Memory read-only or read-write (min 8kbyte max 64kbyte)
Multi-tag processing capability is
Working frequency 433MHz
The label reading range is up to 15m, depending on the reader sensitivity setting
Signal strength can penetrate non-metal materials
Power supply-CR2477, (500mAH, diameter of 24mm, thickness of 5mm)
-Battery life is not less than 12 months. (Transmission frequency is not less than 1 time/2s, Tag continuous working status)
-Battery options are available in a variety of specifications
-With low pressure alarm
-Has a power switch
-Support external power supply
Working temperature -35℃ to +70℃
Storage temperature -40℃ to +85℃
Various sizes
Weight 30G
Raw material ABS
Optional accessories rechargeable battery;
2) Configuration scheme two
A 915M UHF reader with 4 antennas and an artificial video license plate recognition system are used to realize the function of vehicle data collection, of which 4 antennas and 2 are external and 2 are internal. The linear polarization and circular polarization antennas are matched to ensure the coverage of the antenna field. After collecting the tag data, it is uploaded to the central computer for processing, and the direction of the car is judged by analyzing the antenna number of the tag in the car. The solution chooses a tear-proof label pasted on the windshield of the car. The advantage is that the 915M electronic label is passive, simple to maintain, and the tear-resistant label guarantees the management requirements of one vehicle and one number. The disadvantage is that it is more sensitive to the reading angle and human contact.
Fixed reader
Performance
Item specifications
Reader size 19.1(L)*6.6(H)*13.5(W)cm
Module size 17.8(L)*2(H)*12.7(W) cm
Power 1500mA, 8.5V DC
Support wireless standard ANS INCITS 256:1999(R2001)-Parts 2,3.1&4.2
ANSI MH10.8.4
ISO/IEC CD 18000 – 4
ISO/IEC WD 18000–6
External power supply 95-250VAC to 9VDC
Operating temperature-20oC to 55oC
Storage temperature-40oC to 85oC
Humidity (non-condensing) 10% to 95%
Vibration 10G, 11ms, half sine wave (when working)
Swing 1.0GRMS, 10 to 500Hz, XYZ 3 directions
Factors such as label size, moving speed, installation surface, surrounding materials, direction, etc. will affect the reading and writing distance
Circular polarization antenna
Performance
Item specifications
Working frequency band 902～928 MHz
Half-power beam width 65° in horizontal plane and 65° in vertical plane
Voltage standing wave ratio VSWR ≤1.4
Gain 7.5dbic
Polarization circular polarization
Power 1 watt
Impedance 50 ohms
Size 25.4×25.4×3.8 (cm)
Weight 0.57kg
Linear polarized antenna
Performance
Item specifications
Working frequency band 902～928 MHz
Half power beam width 30° horizontal and 90° vertical
Beam forward to reverse ratio> 23 dB
Voltage standing wave ratio ≤ 1.3
Gain 10 dB
Impedance 50Ω
Polarization method horizontal linear polarization
T&B industrial-grade connectors can be used for connecting devices
Power 1 watt
Size: 60×16×7.5cm
Weight 6 Kg
Installation method Use antenna fasteners to fix the antenna on the antenna bracket φ40～60mm galvanized steel pipe
Windshield sticker
Performance
Dimensions: 46.0mm×79.0mm×1.3mm
Operating temperature: -40°C~+85°C
Working frequency: 915 MHz
Storage capacity: 1024bits
Reading distance: 4 meters
Types of tags: passive response, read/write
Features: tear and damage
User effect
1. Automatic identification technology helps companies realize the needs of vehicle access information management
2. The project satisfies the customer’s demand for informatization reengineering
3. The project has played a preventive role for customers to prevent vehicle or article security omissions
4. The project solves the problems of scattered vehicles and unstable attendance for enterprises
The radio frequency (RFID) vehicle operation management solution is based on Weishen Technology’s RFID technology, which satisfies the user process reengineering demands. It is a part of the RFID series solutions of Weishen Technology Company, and integrates the past “fixed asset RFID solutions”, “RFID logistics information solutions”, “tobacco industry RFID digital storage solutions”, “book audiovisual RFID solutions” and ” This is another successful solution based on the successful technical experience of the “Dangerous Goods Management RFID Tracking Solution”. As a well-known system integrator in the field of automatic identification, Weishen will continue to improve, provide customers with more professional information solutions, and add more outstanding research and development results in the fields of radio frequency RFID automatic identification technology, QR code technology and mobile computing technology. .
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