Based on active and semi-active technology to create RFID management of urban construction waste transportation vehicles
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The company’s main business is 2.4G long-distance readers and various active electronic tags in the field of radio frequency identification. The product adopts the most advanced 0.18uM microwave chip technology, which makes the performance of RFID substantially improved compared with the original microwave technology, and completely solves the long-distance, large-flow, ultra-low power consumption, and high-speed moving identifiers. The problem of identification and data transmission, and the cost is greatly reduced compared with the past. At the same time, it also solves the fatal weakness of the low-frequency electromagnetic wave technology with short induction distance and poor anti-collision ability. Its various technical indicators are superior among similar products, and are widely used in long-distance identification of various personnel, vehicles and assets, all-in-one card consumption, anti-counterfeiting and anti-theft, real-time monitoring, tracking and positioning, etc.
1. Project topology diagram
2. Summary of the technical route adopted by the project
As shown in the previous section, this project is mainly composed of 5 parts:
1. On-boardRFID electronic label;
2. Mobile handheld or fixed card reader;
3. Video recording devices at transfer points and disposal points;
4. City data center computer room network and server, storage, database and other back-end equipment;
5. Monitoring center management command system.
Managers of the City Appearance and Environmental Sanitation Department, relevant personnel of the urban management departments of various districts (parks), information personnel of various construction waste management and service enterprises, etc., use the Internet and rent the operator’s 3G/GPRS, optical fiber network and third-party GPS platforms (including electronic maps), Through the “Construction Waste Transportation and Disposal Monitoring Platform System” software, real-time, all-round, and full-line monitoring, statistics, and consulting management of waste transportation vehicles are realized.
3. Software technology architecture and system
Taking into account the object-oriented regionality and decentralization of construction waste transportation and disposal management, in order to improve system performance and better realize data sharing, the system uses a mixed mode development (B/S+C/S mode), that is: only in the system Need to be completed internally and require high data confidentialityRFID The electronic label management system (issuing RFID cards, data initialization, etc.) uses the C/S client form; while other systems that realize data access through the Internet are developed by B/S, such as the information query module of the urban management department of each district (park).
The system is built on the Microsoft product system, using SQL SERVER2008 database, programming with .NET series development tools, the server uses Windows server 2008 series operating system, and the client runs on Windows XP, Windows Vista, Windows 7 series operating system platforms. Considering that the equipment in the computer room is placed in the data center computer room of the city data center, security and backup are unified with the existing bakbone in the data center computer room for backup management.
The application software consists of the following three systems:
Construction muck transportation vehicleRFID Real-time monitoring system;
Image and video remote monitoring system for construction waste transportation vehicles;
Inspection and supervision system for construction waste transportation vehicles;
The above three systems can operate independently and complement each other.
4. Introduction to the functions of each subsystem of the hardware equipment
1. On-boardRFID Electronic label and card reader
Install an anti-disassembly active RFID electronic tag for each construction waste transportation vehicle, and enter the relevant information of the vehicle (such as: model, driver’s name, license plate number, load capacity, affiliated company, etc.) to the card, and then supervise it when necessary Install RFID card readers in places where you can use fixed card readers (fixed card readers can be used in fixed locations, hand-held card readers can be used in temporary locations), and information such as the arrival or departure time of each construction waste transport vehicle will be automatically read , And synchronously transmit to the background server through the built-in GPRS module of the card reader. The supervision center extracts the information of the scene and the departure place for comparison, and can immediately find out whether the vehicle is dropped in the middle, and whether it arrives in a reasonable time, etc. Taking into account the appearance of unmanned on-site, the system supports unattended, and the fixed RFID reader is automatically triggered to read the card when the vehicle passes by.
The fixed card reader should have: waterproof, lightning protection, high temperature resistance (above 60 degrees Celsius), low temperature resistance (below minus 5 degrees) and other functions.
RFID After the card is verified as legal, it will be based on the installation of the card reader to install a signal light linked with the card reader. The card reading success signal light flashes to indicate that the card is successfully read and the driver can drive away.
2. Camera and video device
It is composed of a video trigger device, a camera device, a background network storage server, etc.
The system principle topological diagram is shown in Figure 1
Figure one
When the vehicle passes the recording point, it is sensed by the fixed card reader to trigger the start of the photographing and camera system to complete the photographing of the vehicles passing by and the recording for a fixed period of time (approximately 5 seconds). The recorded video data is based on the vehicle’s “RFID Card number + time to start shooting (year, month, day, hour and minute, each with two digits)” is the file name and stored in the network storage server. If the card reader device fails to trigger, you can use the standby embedded ground coil induction trigger to take pictures. The hard disk capacity of the network storage server is standard enough to store one month of photographic and video data. According to a construction site, there are 20 muck trucks transporting at the same time, and each muck truck transports 20 times a day, and each video recording time is 5 seconds. It is estimated that the amount of camera data for each video recording point per day is about 778M (calculated based on the round-trip shooting, the actual video does not need to be recorded when the car returns). The capacity of a JPEG format 1024*768 photo is generally not Up to 400K, the capacity of each photo taken every day is about 313M. The total data volume of “photo + video” is about 1090M, or about 1G, 30G per month, and 30G*80 per month for 80 construction sites = 2400G. Since the construction waste transfer point or disposal point is the place where construction waste transportation vehicles gather, the construction waste transportation vehicles at each construction site will arrive in a concentrated manner, and the number of collections is much greater than the starting point. Nevertheless, we charge 10 times The traffic flow of the construction site is calculated to meet the requirements of storing the photo, video and video data of 10 fixed disposal sites for more than one month. Only a hard disk of more than 1T is required. The long-life, high-brightness spotlight and flashlight installed in advance are used to compensate for the illumination at night. Use high-definition, outdoor waterproof box camera or dome camera with infrared night vision shooting function.
3. Data transmission platform selection
According to the environmental requirements of the unloading points in each district (park) of Ningbo and the communication and negotiation with the operators, it is determined that the operators shall lay optical fiber links to the unloading terminal points at 10 muck unloading points. And to ensure that the various unloading point equipment is provided to work on the same network segment and can access each other, and the real-time link communication is maintained between the opposite end of the network and the Ningbo data center server.
1. Snapshot of the muck truck picture and video file transfer platform
The vehicle successfully triggers snapshots and video clips at each unloading point, and the optical fiber link laid by the mobile operator to each unloading point is integrated through the internal integration of the mobile operator. The entire optical fiber link from the unloading point to the server in the data center is independent The optical fiber channel enables data verification in the entire data transmission channel to ensure the independence and security of video file transmission. The convergence point is connected to the video server (the video server is equipped with dual network cards, one is used to receive the photos and video files transmitted by each off-loading point, and the other is connected to the public private network of the e-government extranet). The public private network connected to the e-government extranet and the network that accepts video files are on different network segments, so that the video transmission network and the public private network of the e-government extranet are logically separated.
1. GPRS service data transmission platform
After the muck truck is successfully verified at the starting point, the GPRS module on the fixed card reader (or handheld patrol card reader) directly accesses the e-government extranet through the wireless network and transmits the data of the muck truck to Ningbo City. The back-end server of the data center is unified and cost-effectively counted by the back-end management software. The management personnel of the City Appearance and Environmental Sanitation Department, the relevant personnel of the urban management departments of various districts (parks), and the information personnel of various construction waste management and service enterprises can browse and process all the business by accessing the WEB server.
4. Data center computer room equipment
According to the requirements of the project approval document, this project does not set up a separate computer room. All networks, storage, blade servers, databases and security equipment are hosted in the computer room of Ningbo Data Center. According to the negotiation, the main equipment that needs to be added in the computer room and dedicated to this project is as follows:
Server: 1 set of blade server rack, 1 set of database server; 1 set of WEB server; 1 set of high-performance video server.
Storage: 1 set of disk array system, mainly used for backup and storage of photos and videos transmitted from each camera and video point, as well as the original information of all muck vehicles. The rest of the hardware (such as network security equipment, monitors, KVM, etc.) can use the existing equipment in the computer room of the Ningbo data center.
5. Monitoring and command center equipment
The monitoring command center is located in the Environmental Sanitation Department of Ningbo City and mainly undertakes the following functions:
Real-time monitoring of the trajectory of muck vehicles;
Play back and compare the original camera data of the illegal vehicle;
Handling and making administrative inspection notices for illegal vehicles.
etc. The construction of the center includes the following main equipment and contents:
Basic decoration, including: electrostatic floor laying, precision air-conditioning installation, monitoring wall installation and UPS system procurement, etc. The network switch realizes the access and connection between the internal departments of the City Appearance and Environmental Sanitation Department, and the management network system of the City Appearance and Environmental Sanitation Office and the network of the central data room. Large LCD TV screen, real-time monitoring of the GPS running track of the vehicle on the electronic map; when the case is being demonstrated and processed, the relevant personnel collectively view the replayed images or videos, etc.
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