Read Automatic vehicle identification (AVI) and city traffic management system text version

SP-TGS-300/301

Automatic vehicle identification (AVI) and city traffic management system

Our complete RFID solution finally solves most problems rising in automatic vehicle identification (AVI) and city traffic management. Example functions include vehicle registration, annually check, traffic statistic (counting car numbers and measuring speed), anti-theft, police supervision, over-speed check, traffic light violation control, etc. Considering two types of products are involved in this application and they have different functional emphasis, the solution will be explained in two parts. Part 1 focuses on automatic vehicle identification, each vehicle having one unique ID tag, such as SP-K300. Part 2 focus on traffic management, wireless vehicle detector applied here to check speed, count car number and work with camera monitoring system to realize required functions. The whole system would be very flexible and more and more functions can be added on with the same hardware. Do not be restricted by the functions listed below since we just show partial standard functions of the system and give customers some concepts about this application. Please notice RFID technology is always customer oriented. We are open to work with customers to build most suitable and complete and cost effective solutions to meet your specific requirements.

Part 1: Automatic Vehicle Identification

Challenge and Demand

With the increasingly growth of the domestic economy and cause of transportation, the total quantity of vehicles is up to 60 million and increasing by 10% per year. With the rapid growth of vehicles, the illegal situation of escaping MOT, appropriation of license, faked license, refitment of stolen vehicles happened more and more. With the improvement of people's living standard, the amount of taxi in the city went up sharply. Few taxi owners refused to take an operating license, or get a license from the surround village in a lower price and carry passengers in a big city. This kind of taxies (called `black taxi') has greatly infringed the interests of country and industry. With the deepening of reform and opening-up, with China's entering into WTO, there are more and more national and international conferences, cultural and sports activities hold. Vehicle jams, illegal break-in without license or even public security cases happens some times. In certain areas, the situation of stealing vehicles severely occurred, which has threatened the harmony and stability of the area. To the above illegal situations, vehicle administration department mainly control them by adding spot-check, strengthening polices and security men. Apparently, the efficiency is extremely low under this way, and it is too difficult to check at the scene. The situation that drivers tried to deny their illegal behavior always happened. In the aspect of vehicle guard against theft, GPS was one of

SP-TGS-300/301

the main selectable technology. GPS anti stealing is an active network system, a large system. Service men in the supervising centre can provide 7x24 hours' instant service, including preparing works before alarming and assigning police men. But GPS can not be widespread due to the high cost. It costs RMB 6000~7000 yuan to install one set of GPS without screen and another thousand yuan for the service fee which the service provider requires. Under these situations, RFID technology can be applied to reduce the cost. Nowadays, AVI systems tend to use active RFID technology. AVI system can be installed at the entrance/exit of the road or street in the city, as the fixed AVI base station. It also can be installed on the top of the police vehicle, as a mobile AVI station. Mobile AVI system is one of the effective ways to solve the problems above. It can move to the assigned conference entrance, road side, checkpoints and toll stations. It can reliably collect data and information from the vehicles passing by (or stop) in real time, on which active RFID tags are installed. By using long range RFID technology, the collected data can be identified, transmitted to the vehicle control centre via (GSM/GPRS/CDMA) and then compared with the saved information in the database of the center to judge whether the vehicle is illegal, or has disobeyed traffic laws or even stolen. The results of comparison will feed back to the AVI system to determine the disposure for the vehicle. For those blacklisted vehicles, the police man can alarm and hold up at once, or inform the check points ahead via communication equipments to hold up them.

Application

AVI (Automatic Vehicle Identification-AVI), based on active RFID technology, includes Car RF tags, fixed AVI base station and mobile AVI base station. 1. car RF tags Car RF tags contain car information, car status and information of car owner. The RF tag has an unique ID code worldwide. The ID code and its information are stored at the information exchange networks of the public security department. The code is static and on the alert until the car is stolen or traffic information is inquired by the car owner. The code can help the police to identify and track the stolen car. The tag must be installed firmly, reliably and as possible as concealed. It can be installed in special manner so that it can alarm automatically once be taken down, without being misused. 2. Fixed AVI base station system By using active RF tags, the identification range can reach 2~80m. Fixed AVI station is usually applied in the Customs, check points and toll stations of vital communication lines to examine, identify and record the passing vehicles. Equipments such as Reader/Writer, intellegent controllor, data transmission unit and power supply are installed in the machine room beside the road. While there is a car with tag passing through the line, the system can read the ID code of the tag, time for passing and the line number, then store these information into the controller's momery. The data transmission unit can pass the vehicle data information collected to public security department and transportation administration center via networks (DDN), meanwhile communicate the command of administration center to the AVI system to depend whether the car can pass through or not.

SP-TGS-300/301

3. moblie AVI base station system in some applications, such as public security and road administration, vital conference and other security cases, mobile AVI system is needed, which can move to any point at the assigned road side or conference entrance to check the vehicles passing by. The equipments it contains is as similar as fixed AVI system, but more simplized. Mobile AVI system can be intalled on the modified police car. It can communicate and transmit data with center with mobile GSM networks or in the way of short message (or other way). If it is requied to report the podition of AVI, the car can be equipped with a GPS receiver which can report the position to the control centre by GSM short message. 4. Simplized mobile check equipment In some special circumstances, Simplized mobile check equipment such as PDA handheld reader can be used. The check officer can use PDA reader to check the passing vehicles in some narrow area. The information of stolen vihecles (black list) can be downloaded in the PDA previously, once the same information is read, the system will alarm immediately. Guard against theft networks based on AVI & GPS The system is consisted of fixed AVI, mobile AVI and GPS locating and guiding system, DDN data transmission and exchange system and GSM mobile communication system. As the diagram below:

Once the owners who use RFID tags found their car stolen, they can give an alarm to the police. While the police receive the alarm, they are giving command to every fixed AVI station to check the passing vehicles, reading the RFID tags of the cars passing by and

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comparing with the taget vehicle's information. If the present car is the target car, then send the car's ID, location of the AVI station and time information to the police via DDN. After receiving the signal, the police can send SMS to the police cars which are equipped with mobile AVI and GPS via GSM. When the police car confirm the message, they will find the best route by using route optimization via GPS locating and guiding system. Afier confirmation and route optimization for several times and sending its own GPS location to other police cars, the stolen car will be hold up and criminals will be caught. The whole process for the return of the stolen car is as below:

Besides guard against theft function, for the cars equipped with GPS, the system can also provide road location and vehicle location inquiry function. Under the assurance of guard against theft, by using RFID tech, the system has greatly reduce the cost, which is acceptable for most people. It has also saved the police force and enhanced the reaction velocity, especially has potential market for wide spreading in taxi industry. Meanwhile, the system can be combined with ETC, AEI and GAI system to be the vital parts of the intelligent transportation system.

SP-TGS-300/301

Remark: the application is also fit able for military and police vehicle anti-fake distinguishing field.

Features

Long range: easily read within 10 meters. Due to the practical need of Gate-ban, the reading range should not be too long. Users have not to approach the reader or pass through the appointed area to be detected by the reader. The identifying process is full automatic, which can avoid the problem that driver must open the window to punch the card in bad weathers. This advantage can effectively relieve the jam caused by massive entering and exiting vehicles in rash hours. Stable running: active cards have stable reading range and not influent by the environment. Moreover, active cards can effectively avoid the shielding effect of the vehicles' anti-explosion metal net, exchanging data with the reader successfully. High speed data exchange between reader and tags, the speed of readable cards can reach 200km/hours. Bi-directional High speed data exchange between detector and receiver High reliability, working temperature -40~85 centigrade, waterproof, shockproof and dustproof. Anti-jamming capability, tolerance of interfering sources at the scene Global free ISM microwave frequency band, no need to apply and pay Ultra-low power consumption, safer and healthier

Product introduction

1. Active RFID card SP-TGS-300/301

Active RFID card is an unique identification for each vehicle, Main specifications as below: Identify range: Frequency: Sensitivity: Battery life expectation ID number Memory space Temperature Storage temperature Retention period without power max=80m (work with SP-RFS-300, in the air) 2.4~2.8GHz -80dbm ~ -90dbm Minimum 6 years, auto-alarm in low battery power 64 bit 97bytes standard, extendable -40 +80 -60 +85 Minimum 10 years

SP-TGS-300/301

Anti electromagnetism 10V/m 0.11000MHz AM electromagnetic waves Vibration Free dropping 102000Hz 15g three axes 1500mm concrete floortwice on each side

Main specifications as below: Identify speed Anti-collision techniques Frequency Transmission power Microwave communication error check Antenna polarization Standard/certification Power supply Communication interface temperature Storage temperature Anti-electromagnetism interferences reliability Directional / omni-directional CE, FCC, ISO9001 6~12v DC (MAX 30Ma) RS232/485/weigand baud rate4800-115200 -40 -- +80 -60 -- +80 10V/m 0.1-1000MHz AM MTBF70000 hours waves 100 tags/s (only ID) simultaneously identifying up to 200 tags 2.4~2.8GHz 3 dBm (software adjustable) Cyclic redundancy check(CRC16)

SP-TGS-300/301

Part 2: City Traffic Management Challenge and Demand

With the rapid growth of economy, the quantity of vehicles in city has greatly increased, as well as the number of drivers. At the same time, the situation of disobeying regulations happened more then before, which has led to great number of damages in bodies and economy. Lot of obstacles have been made in the process of building civilized city, maintaining traffic orders and protecting personal safety. How to efficiently solve the problem of traffic crowding and regulation disobeying to avoid traffic accidents and meet the requirement of Smooth Traffic Project has been the first important issue which the traffic administration has to urgently deal with. "E-Police", also called detecting and recording system, is used to catch vehicles violating traffic rules, such as over-speed driving and red traffic light violation. Traffic rule violation is main factor of traffic accidents, chaos and traffic jams. E-Police system can work all day and all night to monitor violation of red light at the intersection or detecting over-speed driving at preset check points on roads. It works together with camera monitoring system to take photos as evidence of vehicle violating traffic rules. In the present E-Police system applications, there are mainly two ways for detecting vehicles: electric coil detect and video detect. There are two ways for catching pictures: digital camera and video camera. Coil detecting can meet the precision which customer requires, but it need to cutting the surface of road. While the advantage of video detecting is there's no need to cutting the road, but the precision is lower. The detecting precision in day time for video detect is more than 50%, while between 30%~50% during night. In our analysis, the reason why this kind of product can be successfully applied at abroad is that the traffic condition is simple and the situation of mixed movement of pedestrian, motor vehicle and non-motor vehicle seldom happens. In China, video detecting products can be used in high way traffic information collecting system, but unsuitable for the complex crossroads. The diagram below shows the capturing rate comparison between day time and night, which indicate that it has lower rate, and hence lead to some unnecessary dispute in project implementation.

SP-TGS-300/301 Capturing rate comparison (Day time) Digital camera Video camera Video detect Coil detect Under 50% Above 95% Under 40% Above 85% Digital/ video combination Under 50% Above 95%

Capturing rate comparison (Night) Digital camera Video camera Video detect Coil detect Under 45% Above 90% Under 35% Above 80%

Digital/ video combination Under 45% Above 90%

Application and solution

Based on the Watt ultra-low power consumption technology, combined with RFID technology and wireless sensing technology, Shanghai SuperRFID Electronic tech Co. Ltd has developed a wireless imbedded type vehicle detector applied in precisely detecting vehicles' passing, named eFlux. 1. Red light violation detection and recording

Three elements when capturing running a red light: stop line, red light signal and license number. According to the electromagnetic induction method, when an object of metal passes through an electromagnetic field, it will change the magnetic flux of the field and will lead to a change of return circuit of the field. By imbedding a wireless terrestrial magnetism detector beyond the stop line at the crossroad, the detector will generate an electromagnetic field which is vertical with the road surface. When vehicles pass through the detector, it just equals as a metal object cutting the electromagnetic field, as a result the magnetic flux of

SP-TGS-300/301 the field changes, and lead to a change of return circuit of the wireless terrestrial magnetism detector. When the vehicle detector installed at the crossroad receives the return circuit of the wireless terrestrial magnetism detector, it will transform the current signal into an output high-low frequency signal. On the other hand, when the signal converter installed at the crossroad receive a current signal of the signal light at the same time, it will convert the current signal into an output high-low frequency signal. If the control software can detect the signal converter's "red light" signal and the signal from the vehicle detector saying there a vehicle passes through at the same moment, then the controller will send a signal of "capture" to the camera and flashlight and the camera will capture the disobeying situation when vehicle pass beyond the stop line during "red light". If the light at the crossroad is inadequate, the control system will start flashlight automatically to light the environment. The disobeying information captured include "stop line, red light signal, license number, type of the vehicle, color of the vehicle, disobeying date and time, disobeying lane ". The control software of system cannot send a capture signal to camera and flashlight until it simultaneously detect the converted "red light" signal and the passing signal from the vehicle detector. Both of the signals should be got. For instance, if the signal light is green, then the signal detected by the signal detector is green light, even if there is a vehicle passing through, the controller will not send a capture signal to camera and flashlight. If the signal light is multi-directional, as left-turning, right-turning and straight movement, then detecting coils can be imbedded in different lanes to avoid mistakenly capturing and lost capturing for different lanes and to maintain the justice and accuracy for enforcement. 2. Over-speed detection and counting car numbers Two wireless vehicle detectors SP-eFlux-100 will be put closely along the road, at the point speed needs to be checked. If over-speed is detected, attached camera monitoring system will start to work to catch pictures of the vehicle. The system is also used for normal vehicle speed checking with good precision level. Besides, we use such detectors to calculate traffic flow at any points need to monitor. Based on those data, traffic management can be much more effective and efficient.

Features:

High precision: the magnetic field of earth is invariable in several kilometers, but large magnetic material object can influent the earth's

SP-TGS-300/301 magnetic field greatly, the terrestrial magnetism detector can identify 1/6000 variation of the earth magnetic field. While the influence caused by vehicles on earth magnetic can be strong enough to use the terrestrial magnetism detector to detect vehicles, which has extremely high sensitivity. Convenient for installation and maintenance, not need to block off the street, little damage to the surface. When eFlux is installed on suspension bracket or on profile, there's no need to destroy the road surface, just inspect the terrestrial magnetism detector when maintaining. The detect point is not easy to be damaged, no influence by movement of the road surface. Not influent by the climate, as the terrestrial magnetism detector can detect the variation of magnetic field when metal material objects pass through. Bi-directional High speed data exchange between detector and receiver High reliability, working temperature -40~85 centigrade, waterproof, shockproof Anti-jamming capability, tolerance of interfering sources at the scene Global free ISM microwave frequency band, no need to apply and pay Ultra-low power consumption, safer and healthier

Product introduction

1. wireless vehicle detector: SP-eFlux-100

Main specifications as below: Identify range: Frequency: Sensitivity: Battery life expectation ID number Temperature Storage temperature Anti electromagnetism

max=40m (work with SP-RFS-300, in the air) 2.4~2.8GHz -80dbm ~ -90dbm long work life from 6 to 8 years 64 bit -40 +80 -60 +85 10V/m 0.11000MHz AM electromagnetic waves 102000Hz 15g three axes

Vibration

Free dropping

SP-TGS-300/301 1500mm concrete floortwice on each side

2. Reader (receiver) SP-RFS-300 series

Identify speed Anti-collision techniques Frequency Transmission power Microwave communication error check Standard/certification Power supply Communication interface temperature Storage temperature Anti-electromagnetism interferences reliability

100 tags/s (only ID) simultaneously identifying up to 200 tags 2.4~2.8GHz 3 dBm (software adjustable) Cyclic redundancy check(CRC16) CE, FCC, ISO9001 6~12v DC (MAX 30Ma) RS232/485/weigand baud rate4800-115200 -40 -- +80 -60 -- +80 10V/m 0.1-1000MHz AM MTBF70000 hours waves

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