RFID solution for intelligent management of bus driving conditions

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1 Introduction
“Bus management” refers to the use of appropriate means to record the time points of the bus to various points, which can effectively control the driving time of the driver.

“Bus management system” refers to the use of modern electronics and information technology, the installation of non-contact cards in each bus, the installation of smart card electronic automatic identification systems at each station, and the implementation of records when the car passes through the station with a card reader The purpose of the intelligent management system is to effectively manage the specific time and other information of the bus entering and leaving a certain station, and can effectively control the situation of car delays

Although the problem can be partially solved through administrative methods, in the end, appropriate “technology” must be used to solve the problem. Practice has proved that the “technical” method is effective.

2 Company introduction
ShangHai Super Ele&Tec Co. Ltd (ShangHai Super Ele&Tec Co. Ltd) is a high-tech company specializing in radio frequency identification (RFID) product research. The company was formally established in 2004 and is located in the Huigu High-tech Center of Shanghai Jiaotong University.

The long-distance radio frequency identification equipment of Shanghai Xiupai adopts the most advanced 0.18uM microwave chip technology, which makes the performance of RFID compared with the original microwave technology. The identification and data transmission problems of large T flow, T ultra-low T power consumption, T high speed and T moving markers, 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 sensing distance and poor anti-collision ability. , Its various technical indicators are in the leading position of T in the industry among similar products, creating a new era of “T long-distance recognition technology T”.

There are nearly 60 employees in the company, of which 85% have a university degree or above (1 professor, 3 doctors, 5 masters, and 3 technical consultants). In 2005, the “RFID Basic Laboratory” was jointly established with the School of Software and Information Security of Jiaotong University, which provided good technology and foundation for the innovation and development of enterprises. Relying on the technology and talent advantages of Shanghai Jiaotong University, after years of experience and product accumulation, the company has a first-class technical team that can complete the development and production of long-distance target recognition, data transmission and other products. After years of rapid development, it has become a leading and well-known enterprise in the industry.

Our credo: “Users succeed! We can succeed!” Our goal: “Become the most well-known RFID technology and product provider in China, build a world-renowned electronic label product and solution provider brand, and become the best company in China Ranks”.

3 Business needs
With the development of the city, people’s life pace is faster, and the requirements for transportation are getting higher and higher, such as routes, time, and so on. This requires more standardized management of bus attendance, so as not to affect the normal operation of buses due to some scheduling problems (sometimes the interval is too long, sometimes too short).
Nowadays, manual recording is basically used to do this, which not only wastes a lot of manpower costs, but also makes it difficult to control the specific driving time of the driver.
Therefore, the use of Xiupai’s bus management system can effectively solve the problem, it can solve the bus attendance, and it can also record the specific time of the bus to each stop. It can manage the driving conditions of the company’s various lines more quickly and effectively.
4 Introduction to core technology
4.1 RFID
RFID is the abbreviation of Radio Frequency Identification in English (Radio Frequency Identification). Radio frequency identification technology is an automatic identification technology that began in the 1990s. Radio frequency identification technology uses radio frequency signals through spatial coupling (alternating magnetic or electromagnetic fields). ), a technology that realizes contactless information transmission and achieves the purpose of identification through the transmitted information.

The scheme of short-range wireless monitoring system has a long history, and people treat it as an important part of the earth’s neural network. With the rapid development of short-range wireless communication technology, especially the large-scale application of Wi-Fi and Bluetooth products, the technology is mature and the cost is reduced, forming the 802. series, Wi-Fi, Zigbee, Bluetooth 1.1, Bluetooth 1.2, RFID, Technical standards and alliances such as UWB.

5 technical solutions
5.1 Car management technology scheme

Based on its own characteristics, Shanghai Xiupai Company uses RFID technology and proposes to manage the time when cars pass by important stations.

In this scheme, two kinds of equipment are mainly used, readers and electronic tags (active), they are all designed and manufactured by Shanghai Xiupai Company.

surface 5.1 List of main equipment

Serial number

Equipment name

model

main effect

Remark

1.

Reader

(Reader)

SP-D300

Install one at each important station and at the entrance and exit of the main station

2.

electronic label

(Tag)

SPK200

Install one on each car


The principle of this method is very simple. When the car passes the station, the card reader installed at the station will write the station name, time, etc. into the card, and then store it in the memory of the card. In this way, every time the car After a station, the reader installed on the station will write the appeal information into the card on the car. When the car enters the terminal and passes through the card reader at the terminal, it will upload all the information to In the card reader, the card reader additionally uploads all the data to the host computer through the RS232 interface.
The installation is also very convenient. The reader adopts solar power supply, and the reader is fixed on a certain part of the platform. Generally, it is installed on the higher part of the stop sign of each station to ensure its safety. Put a card in each car and use strong glue to fix it on any part of the car.
6 Technical characteristics and comparison of Shanghai Showpai
The Ministry of Information Industry of my country promulgated the “Notice on Adjusting 2.4GHz Frequency Band Transmitting Power Limits and Related Issues” on August 23, 2002 to further clarify the 2.4GHz ISM openness and related technical limits.
The 2.4GHz frequency band is used as a shared frequency band for various radio stations such as wireless local area networks, wireless access systems, Bluetooth technology equipment, point-to-point or point-to-multipoint spread spectrum communication systems. All types of radio communication equipment that meet the technical requirements share frequencies with radio positioning services and non-wireless communication equipment such as industrial, scientific, and medical equipment in the 2.4-2.4835 GHz frequency band, which are all main services. It can be seen that the use of the 2.4-2.4835 GHz ISM frequency band has sufficient legal guarantees, and in the reality that my country has not formulated relevant frequency band specifications for short-range wireless communications, there is no policy risk in using the 2.4Ghz frequency band.
Supai’s RFID and short-range wireless communication equipment have selected the 2.4GHz band, and unified RFID and short-range wireless communication equipment, following the same standard from the physical layer to the protocol layers, so that the products can be suitable for a variety of different application requirements. The power of our products is far less than the above regulations.
Although the power consumption of short-range wireless communication is already low, it still cannot support long-term stable work (6-8 years) powered by a small lithium battery (a few hundred mAh). Its products have achieved this, and the technology is currently the world leader.


surface 7.1 Technical Data Sheet

Serial number

Feature name

Characteristic description

Remark

1.

Recognition distance

Long distance (2 ~ 80rice ) Adjustable

2.

Recognition ability

Simultaneous recognition200Goals

3.

Recognition speed

200kilometer / Within hours

4.

Identification method

It is an omnidirectional identification method, no directionality requirement

5.

Micro power consumption

Unique micro power design

6.

Communication mechanism

based on HDLC Time division multiple access and synchronous communication mechanism

7.

Service life

6 ~ 8 Annual service life

8.

Anti-interference

Using channel isolation technology, multiple devices do not interfere with each other

9.

working frequency

Global open2.4 GHz ~ 2.5 GHz ISMMicrowave section, no need to apply and pay

10.

Encapsulation

Solid state package, waterproof

11.

Lightning protection

Lightning protection design to meet the requirements of industrial environment

12.

reliability

Waterproof and shockproof

13.

safety

Encrypted calculation and authentication to ensure data security and prevent link eavesdropping and data cracking

14.

interface

supportRS232/485/Wigan26Communicate with host computer and provide various development interface functions

1

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