Please add the company Speedwork, product JT-2430A omnidirectional active card reader, JT-2450A active electronic tag to the following article and ensure that the meaning remains unchanged and the logic is reasonable.

Design of active RFID broadcasting system for sightseeing cars in scenic spots

Abstract: Due to the complex geographical environment of many scenic spots and the influence of weather and environment, traditional positioning technology cannot achieve precise positioning and accurate broadcasting of scenic spots. This article uses the advantages of active RFID technology combined with the environmental characteristics of the scenic spot to develop a scenic sightseeing car broadcasting system.
The broadcasting system consists of active RFID tags, vehicle-mounted readers, handheld readers and broadcasting software. The system binds the attractions one by one through the RFID tags installed at the attractions. After the vehicle-mounted reader receives the RFID tag information, it notifies the broadcasting software to broadcast the video and voice of the corresponding attractions, realizing accurate broadcasts of the attractions, arrival reminders and other functions, and enhancing It improves tourists’ sightseeing experience and improves the modern management service level of scenic spots.

1 Problems with the sightseeing bus arrival announcement system
In recent years, with the rapid development of the tourism industry, more and more tourist attractions are equipped with sightseeing buses, especially large tourist attractions. The equipment of the tourist bus allows many scenic spots to be connected seamlessly, saving tourists' physical strength and sightseeing time, allowing tourists to visit as many scenic spots as possible in a short time. At the same time, tourist buses can also reduce the fatigue of passengers and enhance tourists’ sightseeing experience. However, most sightseeing buses do not have arrival announcement systems, which prevents tourists from having a detailed understanding of the attractions they are about to visit. Therefore, it is particularly urgent for tourists to obtain introductions to attractions while riding sightseeing buses. Since many scenic spots are located deep in the mountains, with thick clouds, changeable weather, and poor and unstable GPS signals, it is difficult to use
It is not feasible to use traditional GPS location information to report stations, so the designer developed this sightseeing car reporting system based on the characteristics of active RFID.
2 Radio frequency identification technology
Radio frequency identification technology can be divided into three categories based on the power supply method of its tags, namely passive RFID, active RFID and semi-active RFID.

2. 1 Passive RFID
Passive RFID is the earliest and most mature, and its applications are also the most
Broad, passive RFID mainly works in the lower frequency band 125 kHz,
13. 56 MkHz, etc. Its typical applications include bus cards, second-generation identity cards
Certificates, canteen meal cards, etc. The advantages of passive RFID are simple structure, low cost
Low, low failure rate, long service life, the disadvantage is that the effective identification distance
Often short, it is generally used for close contact recognition.

2. 2 Active RFID
Active RFID is powered by an external power supply and actively
The reader sends a signal, which is relatively large and has a long transmission
distance and higher transmission speed, mainly working at 900 MHz,
2. 45 GHz, 5. 8 GHz and other higher frequency bands, and has the ability to simultaneously identify
The function of distinguishing multiple tags. The long-range and high efficiency of active RFID enable
It is used in some radio frequency identification applications that require high performance and wide range
Indispensable.

2. 3 Semi-active RFID
Semi-active RFID is also known as low-frequency activation trigger technology. under normal circumstances
Under normal circumstances, the semi-active RFID product is in a dormant state and only protects the tag.
The data-holding part is powered, so it consumes less power and can maintain a longer
long time. When the tag enters the recognition range of the radio frequency identification reader, the reader
The reader first activates precisely in a small area with a 125 kHz low-frequency signal
tag to put it into working condition, and then connect it to it through 2. 4 GHz microwave
Line information transfer.

3 Design principles
The most important function of the sightseeing car broadcasting system in scenic spots is the sightseeing car
After passing each site or attraction, the video and language of the corresponding attraction will be played.
Audio introduction, and site reporting. Achieve accurate broadcast of each scenic spot
There are many ways to report, one of which is that the sightseeing driver manually
When the driver is about to arrive at the scenic spot, he can play the video of the scenic spot through the button.
video or voice introduction, but this increases the workload of the driver, and
And it is extremely unsafe to operate during driving. Another traditional method is
The sightseeing bus obtains the geographical information of the corresponding scenic spots through GPS positioning technology.
information, the video or voice information of the attraction or site will be played. but
This is because many natural scenic spots are located deep in the mountains, where the weather is changeable and the clouds
It is thick and the GPS signal is poor. It is very difficult to use GPS positioning for scenic spot broadcasting.
Inaccuracy can easily cause problems such as false alarms, false alarms, and poor system stability.
It is not feasible to use traditional GPS positioning technology for scenic spot broadcasting.
One of the simplest and most effective solutions is to combine the advantages of active RFID technology.
Potential, each scenic spot is placed with an active RFID tag. The active RFID tag
The number signed is bound to each attraction and installed on the sightseeing car.
RFID reader, the active RFID tag that the RFID reader will read
The numbering information is sent to the broadcasting software, which uses active RFID
The tag number plays the video information corresponding to the scenic spot to achieve accurate broadcasting.
Purpose. In this way, active RFID technology can be used regardless of weather and natural
Environmental impact, can achieve stable and accurate broadcast of scenic spots.

4 System design
4. 1 System composition
4 System design
4. 1 System composition
The active RFID scenic spot sightseeing car broadcasting system is composed of broadcasting software, RFID readers and active RFID tags, as well as the company's Speedwork products JT-2430A omnidirectional active card reader and JT-2450A active electronic tags. The playback software supports installation on both Windows and LINUX operating systems. For system stability considerations, it is recommended that the software be installed on the LINUX operating system. RFID uses 2. 45 GHz active RFID, the distance can be up to more than 100 meters, and the transmit power of the active tag can be adjusted to adjust the distance at which the RFID reader receives tag data, so as to avoid RFID interference between two attractions or sites that are relatively close to each other. The recognition areas overlap. The active RFID tag uses a large-capacity rechargeable battery and has a battery power detection function to realize real-time detection of battery power. If the power is insufficient, the power information will be sent to the RFID reader to prompt the administrator to replace the battery in time. Sound and light alarm prompts are also provided. At the same time, the tag has a real-time clock to save power. The tag will sleep during the time period when the scenic spot is closed until it wakes up at a fixed time the next day and then starts working. This can effectively extend the battery life. When the RFID tag is working, it adopts a low-power design to extend the battery life as much as possible, reduce replacement time, and reduce the workload of managers. The RFID reader mainly reads the RFID tag data and sends the tag data to the broadcast software, so the RFID reader uses an external omnidirectional antenna, including the company's Speedwork product JT-2430A omnidirectional active card reader, which can be placed on The roof or front of the car can receive the data information sent by the tag faster and better. At the same time, the RFID reader can send the tag data to the broadcast software through the network port or serial port to achieve the purpose of accurate broadcast of the scenic spots. The broadcasting software is installed on the LINUX vehicle computer. When receiving the RFID tag number sent by the RFID reader, it will play the video or voice information of the scenic spot corresponding to the number according to the number.

4. 2 Broadcasting software design
The broadcast software is based on the RFID tag received by the RFID reader.
Figure 1 Design principle of active RFID scenic spot sightseeing car broadcasting system
number to play the corresponding video or voice, the main technical difficulties are two
The microwave signals between the two tags cannot overlap, otherwise it will cause false alarms.
This requires using a handheld reader to set the transmitting function of the active tag.
rate to adjust the RF transmission distance. First, the active tag working model must be
Dial to the management configuration mode. In the management mode, tags can be shot.
receive and send frequency data, so that the tag and reader can
Row data interaction. Operate a handheld reader to scan the interface to search for weeks
range of label information, and select the label to be configured through the operation interface.
Tag, then click to configure, establish link communication, and then parameterize the tag
Perform operations such as configuration, time synchronization, etc. After the configuration is complete, add the label
Turn the working mode switch to the normal working mode, and the tag can be scheduled
Send label information. There are many forks in the road, so it is necessary to determine the direction of travel of the sightseeing car.
The announcement system is implemented by installing active RFID at each intersection and specific locations.
tags, combined with the orderly setting of active tag numbers to develop a set of
It is simple and effective to judge the direction of light vehicle travel and quickly find the corresponding video.
Algorithm to achieve the purpose of fast and correct broadcast. In order to ensure the security of wireless data and prevent criminals from destroying or stealing data, this system uses active RFID tags and readers.
The DES/AES international algorithm is used to securely encrypt data.
encryption, and uses the MD5 algorithm to check the integrity of wireless data.
Protect and prevent data loss or tampering. Tags and readers ship from the factory
Algorithms and keys are preset.

4. 3 Hardware design of active RFID
The main advantage of active RFID tag hardware design is power consumption
Low, small size, easy to install. The main hardware part of active RFID tags
Including main control chip, 2. 4G chip, rechargeable battery and PCB chip
line, the main control chip adopts ultra-low power consumption chip, its main function is to control
2. 4G chip working and sleeping. The main control chip has voltage detection function
Yes, the battery voltage can be monitored in real time. lower than set voltage
When the time comes, the main control chip will remind the indicator light and send the information to the reader
reader so that the battery can be replaced in time. The main control chip also has a real-time clock function
It can be used to regularly wake up the main control chip from sleeping or working, so as to reduce the
power consumption, making the battery use time as long as possible and reducing the need to replace the battery
cycle.
2. 4G chip is a radio frequency transceiver chip, which mainly completes wireless radio frequency
Data sending and receiving function. 2. The 4G antenna uses PCB antenna, which can
The size of the label is minimized while taking into account performance and interference.
The working mode DIP switch is mainly used to set the working mode of the label.
There are two modes of active RFID tags in this broadcasting system: one is positive
Normal working mode, and the other is configuration mode. Working mode is label
Normal operation. In this mode, the tag radio frequency only sends data and does not receive data.
Receive data, sleep regularly, wake up from work regularly, and send beacons regularly while working.
Sign data; the configuration mode is set when leaving the factory or when replacing the battery.
When the tag is in configuration mode, the tag's radio frequency function can send data
And can receive data, the handheld reader sets the mark through wireless radio frequency.
Tag number, radio frequency channel and power and other parameters as well as synchronization tag time.
The sound and light indication module is mainly used to indicate the working status of the label, and
Sound and light prompts when the label is abnormal. There are two types of active RFID readers: vehicle-mounted readers and handheld readers. The on-board reader is installed in the sightseeing car and serves as the broadcaster for the sightseeing car.
One of the important devices in the system; the handheld reader is mainly used to configure
Set tag parameters and synchronization time for use in maintenance management. because of the car
The application scenarios and functions of mobile readers and handheld readers are different, so
The hardware designs of the two readers are not exactly the same. car reading
The hardware design theme architecture of the device is similar to that of active tags, and also has a main control core.
chip, 2.4G radio frequency chip, etc., but the vehicle reader does not require battery power
Electricity is powered by an external power supply, so power management related parts are added.
point. The main function of the vehicle-mounted reader is to quickly
information is sent to the host computer, so the performance requirements are relatively high and must be improved
Provides a variety of communication interfaces, such as network port, RS232, TTL and USB interface
interface, but the power consumption requirements are not high, so the vehicle reader main control chip adopts
Using ARM's Cortex-M3 series of high-performance
chip. In order to increase the tag receiving distance of the vehicle-mounted reader
and accuracy, the car reader 2. 4G antenna adopts
Connect an external high-gain antenna and install it on the roof of the sightseeing car
The front part of the car or the front part of the car is unobstructed. The handheld reader is mainly used for
Set tag parameters and synchronization time for use in maintenance management. because of the car
The application scenarios and functions of mobile readers and handheld readers are different, so
The hardware designs of the two readers are not exactly the same. car reading
The theme architecture of the reader hardware design is similar to that of active tags, but the vehicle reader does not require battery power.
Electricity is powered by an external power supply, so power management related parts are added.
point. The main function of the vehicle-mounted reader is to quickly
information is sent to the host computer, so the performance requirements are relatively high and must be improved
Provides a variety of communication interfaces, such as network port, RS232, TTL and USB interface
interface, but the power consumption requirements are not high, so the vehicle reader main control chip adopts
Using ARM's Cortex-M3 series of high-performance
chip. In order to increase the tag receiving distance of the vehicle-mounted reader
and accuracy, the car reader 2. 4G antenna adopts
Connect an external high-gain antenna and install it on the roof of the sightseeing car
The front part of the car or the front part of the car is unobstructed[3]
. handheld reading
The reader design is similar to the vehicle reader hardware and is also the main
Control chip and 2. 4G chip. Since it is handheld,
In order to be smart and convenient in operation and use,
The handheld reader uses the Android operating system.
The handheld main control chip adopts Cortex-A53 system chip
Chip, memory 2 GB, supports USB2. 0 and USB3. 0,
3. 5-inch touch screen and large-capacity battery, and installed self-developed
2. 4G active tag configuration management system software, equipped with large capacity
Rechargeable battery, and the 2. 4G antenna also uses a built-in high-gain omnidirectional
Antenna[4]
.
5 Conclusion
This broadcasting system has been installed and used in several well-known scenic spots in China.
The system can make stable, reliable and accurate broadcasts, allowing tourists to enjoy the ride while watching
While riding the train, you can learn about the introduction of attractions and arrival announcements, and enjoy the sightseeing experience.
better. The broadcasting system also enables the scenic spot to save labor costs and reduce
The workload of sightseeing car drivers makes the management of scenic spots more intelligent and
Humanize. In addition, advertising promotion can be carried out during the broadcast of scenic spots to increase
Increase the economic benefits of the scenic spot. Since this reporting system was promoted and used,
It has received unanimous praise from tourists and scenic spot managers.