KR20100118459A - Improved bus information system - Google Patents

Abstract

PURPOSE: An improved bus information system is provided to reduce excessive data by performing communication system through a Zigbee technology. CONSTITUTION: A bus(10) has an RFID sender(13) therein. The RFID sender has an identification value therein. A stop station(40) comprises a station guide system. The station guide system includes the RFID reader(41), a Zigbee adaptor, a data unit, a guide system, a controller(44), and a power supply unit. A situation center(30) monitors the services conditions of buses, and manages the data of the stop station guide system.

Description

Improved Bus Information System

The present invention relates to an improved bus information system, and more particularly, communication between a bus and a stop using RFID technology without using CDMA technology, and communication between a stop and a stop using Zigbee technology. The present invention relates to a bus information system in which an entire network is established by communicating between at least one stop and a situation center by wire or wirelessly.

Bus Information System (BIS) is a system that informs the passengers who are waiting to use the bus at the bus stop and informs the estimated time of arrival of the bus, and combines GPS and CDMA technology to transmit the current location information of the bus to the center. The center is an advanced public transportation system that minimizes the waiting time for passengers by guiding the scheduled time of arrival buses at each stop based on the collected information.

GPS (Global Positioning System) technology is a system that uses satellites to know information about the current position. It is used for military and civil purposes such as weapon guidance, navigation, surveying, mapping, geodetic, visual synchronization, etc. In addition, it is possible to receive the location (longitude and latitude) information of the receiver through artificial satellite.

In this case, if the information is received by only one satellite, an error may occur due to time, so that accurate position information can be obtained by receiving information from two or four satellites and correcting the error.

Code Division Multiple Access (CDMA) technology is a multiple access technology developed by a company called Qualcomm in the United States and commercialized by a Korean company, and allows multiple users to access a single cell using codes in mobile communications. As a technology for enabling mobile communication, multiple access technologies are necessary because many communicate using limited frequency bands.

Code division multiple access is a spread spectrum transmission of a coded signal to allow multiple users to simultaneously access the same frequency band. The terminal decodes and demodulates the spread signal so that a user can use the service.

Zigbee technology is a representative technology of short-range wireless sensor network with low power, low cost, and ease of use. It is a technology that standardizes higher protocol and application layer based on the IEEE 802.15.4 standard physical layer and MAC (MAC) layer. It is suitable for ubiquitous network configuration because it can be connected to multiple objects using.

RFID (Radio-Frequency IDentification) technology is a technology that recognizes information over a long distance by using radio waves. It requires an RFID tag (sender) and an RFID reader (reader). The transmitter consists of an antenna and an integrated circuit. Information is recorded inside the antenna and transmitted to the reader via the antenna, which is used to identify the destination to which the sender is attached.

The difference between RFID and bar code systems is that they use radio waves instead of light, so they can read RFID values over long distances rather than short distances and even receive information through objects in between. .

RFID can be classified into the power used. RFID, which reads and communicates information on the chip using only the power of the reader, is called passive RFID. Semi-passive RFID is a battery with a built-in transmitter. The power is used to read information, the power of the reader is used to communicate, and finally, active RFID can be classified as using the power of the transmitter to read and communicate the information on the chip. have.

Looking at the operation principle of the conventional bus information system, if each bus to produce the current location information of the bus using a GPS terminal, and transmits the current location information of each bus to the situation center using a CDMA terminal, After the current position information of the bus is collected, the estimated time of arrival of the bus stop is calculated, and the corresponding time of arrival of the bus is informed to the relevant stop.

However, in each bus, the current location information is produced by using GPS, and the data is sent back to the center to collect the data at the center, resulting in excessive data transmission and collection, which leads to the installation and maintenance cost of the bus information system. There was a problem that causes the increase.

In addition, when CDMA technology is used between the bus and the situation center, and between the situation center and the stop, the amount of data used for communication is unnecessary compared to the amount of data to be transmitted. Occupies a problem for users who use mobile communication such as mobile phones by occupying a line.In particular, due to the inherent limitations of CDMA technology, data loss occurs frequently during the data transmission process. There was a problem that caused an error when calculating the error.

In view of the above problems, in this application, communication between bus and stop, stop and stop, stop and situation center using Zigbee technology does not use CDMA technology, thereby reducing excessive data transmission and operating economically and precisely. The purpose is to provide an improved bus information system.

In addition, in the improved bus information guide system, the GPS system can be used to recycle the conventional system while improving the accuracy of the information, and the bus stop can be supplied with the solar system to provide more efficient bus information system. It has a purpose to provide.

In order to achieve the above object, in the present application, data can be transmitted between a bus to which an RFID transmitter is attached and a bus stop where an RFID reader is installed, and data is transmitted between each bus stops using a Zigbee transceiver. By connecting the network by wire or wirelessly between the station and the situation center, the location information of the bus can be generated at each station and shared among the stations, and the situation center can be controlled to reduce the excessive network communication cost and effectively use it. Disclosed is a technical idea of a bus information system.

In addition, it is possible to supply power by installing a solar system at a stop, or to inform passengers waiting for the bus at the stop by using the LED indicator to inform the arrival time of the bus, or to determine the presence of passengers by using a human body sensor. Disclosed is a technical idea of a bus information system in which a function of enabling selective guidance is added.

In the present application, as a specific means for achieving the above object, the components constituting the bus information system for guiding the current position or scheduled arrival time of the bus to arrive from the passenger waiting for the bus at the bus stop, RFID transmitter with a unique ID value Built-in bus; An RFID reader for reading information of the RFID transmitter, a Zigbee adapter for communicating with another station or another Zigbee terminal, a data unit incorporating a unique ID value of the bus stopping at the station, a current position or estimated time of arrival of the bus A shelter provided with a guide unit configured to include a guide unit, a RFID reader, a Zigbee adapter, a data unit, a control unit for controlling the guide unit, and a power supply unit for supplying power; A situation center connected to one of the station guide devices by wire and wireless to identify the overall bus operating situation and manage data of the station guide device; A bus information system comprising a is disclosed.

The information system is a process of transmitting a unique ID value of the bus using the RFID transmitter on the bus; In the station guide apparatus within the effective distance between the bus and the RFID, if the unique ID value of the bus sent from the RFID transmitter is read, the data unit is searched to guide the arrival through the guide if the unique ID value of the bus stopping at the stop is read. If the unique ID value of the bus does not stop at the stop, converting the data including the time taken to the unique ID value of the bus and the ID value of the read stop and transferring the data to another stop guide device using a Zigbee adapter; In the station guide device that receives data from other station guide devices through the Zigbee adapter, after extracting the bus unique ID value from the received data, if the unique ID value of the bus stopping at the data station is searched for the data part, the lead time and lead station Using the ID value to guide the arrival time of the bus through the guide, and if the unique ID value of the bus does not stop at the bus stop, using the Zigbee adapter to transfer the data as it is to other stop information devices; In the station guide device connected to the situation center by wired or wireless, a process of limiting the guidance of the guide by determining whether the bus stops at the station from the received data and transmitting all the received data to the situation center; Collecting, by the situation center, Zigbee data to determine overall bus operation information; Provided is a bus information system operating including.

The bus is additionally equipped with a GPS terminal can be provided to transmit the unique ID value and the current location information of the bus through the RFID transmitter, and the solar cell is further included in the station system is configured during the day It can be provided to charge the solar power to the power supply for the time that is floating, the stop system is configured to additionally include a human body sensor may be provided to guide the bus information only when it is determined that there is a passenger. In addition, the guide unit for guiding the current position of the bus or the estimated time of arrival in the bus stop system is provided in a configuration that includes a display unit that is output through the display panel and the audio output unit that can be confirmed by hearing output by sound The guide portion or the display portion may be a background of a route map of a bus. When the bus map of the corresponding line is located near the upstream stop through the Zigbee data received, the light is supplied by supplying power to the LED bulb at the corresponding stop location. The passengers can be provided to easily understand the current position of the bus, the situation center in the situation center when the need to modify the data of the stop station due to the introduction of a new bus or the change of the route is converted into ZigBee data It may be provided in a configuration to update the transmission to the corresponding station guide.

Conventional real-time bus information system has high installation cost, maintenance fee such as electricity fee, mobile communication network fee by using GPS technology and CDMA technology, but the bus information system provided in the present invention has less installation cost than conventional system, It is economical because it is low and maintenance cost is very low because additional communication cost is not added.

In addition, the conventional system does not use the CDMA mobile communication network, which reduces deadlock due to data congestion and prevents data loss, thereby making it possible to predict the exact arrival time of the bus. It has the advantage that it can be applied through a slight improvement to replace.

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, embodiments of implementing a technical idea of a conventional bus information system and a technical idea of an improved bus information system of the present application will be described in detail with the accompanying drawings.

Prior to this, a bus user-oriented bus information system is a sub-system of a bus company and a bus center-oriented bus management system (BMS), although the present application is intended to explain the technical concept of the present invention only by the bus information system. However, the bus operation management system including the bus information system of the present application shall not be viewed separately from the technical spirit and claims of the present application.

FIG. 1 is a conceptual diagram schematically illustrating a configuration of a conventional bus information system, in which information is transferred between components using arrows.

The GPS 10 is attached to the bus 10 to receive location information from the satellite 50 to generate current location information of the bus. When receiving location information from more satellites, more accurate current location information can be obtained. The generated current location information is transmitted to the situation center 30 through the mobile communication base station 20 using the CDMA terminal 12 including the ID and the current time of the corresponding bus.

The mobile communication base station 20 is a wireless communication facility that connects a network and a terminal for a wireless communication service. The mobile communication base station 20 can use a mobile communication base station of a conventional mobile phone as it is, and a conventional bus information system can use a CDMA mobile communication network. Perform a router function. That is, the network between the bus 10 and the situation center 30 is connected by using the mobile communication base station.

The situation center 30 analyzes the data of the bus received from the mobile communication base station 20, calculates a scheduled time for the bus to arrive at the stop, and then transmits a scheduled arrival time of the bus to the stop 40. When transmitting data from the situation center to the station, the base station 20 or another network may be used for connection.

The situation center 30 is a key element of the bus operation management system, and mainly uses the data of the bus to grasp the real-time operating state of the bus and controls the operation of the bus while controlling it with an execution pipe using a numerical map. However, since the bus information system only needs the function of calculating the estimated time of arrival of the bus and guiding it to the stop, the description of other functions of the situation center is omitted.

The stop 40 may receive the scheduled arrival time of the bus from the situation center and guide the corresponding bus and the scheduled arrival time through an electronic board or a kiosk installed at the stop. For example, if the estimated time of arrival on bus 88 is 4 minutes, broadcast or display the announcement "88-Arrival in 4 minutes", change the time to 1 minute after 1 minute, and continue It will receive the scheduled arrival time of the bus from the situation center and update the data.

The configuration and processing flow of data of the conventional bus information system have been briefly illustrated and described above. The bus 10 receives the GPS information through the satellite 50, generates current location information, and then transmits it to the situation center 30 using the base station 20, and the situation center corresponds to each stop 40. When the estimated arrival time of the bus is calculated and the arrival time information of the bus is transmitted to each stop, the stop 40 guides the arrival arrival time information of the received bus in order of closest time, thereby waiting for the bus at the stop. It is a system to let the passengers know when the bus arrives, and even though it is not shown, the bus information can be provided by the Internet, telephone or mobile so that passengers can easily use the bus.

2 is a conceptual diagram schematically showing the configuration of the improved bus information system of the present application, and shows the configuration of the bus information system of the present application configured without using GPS technology.

The bus 10 is provided with an RFID transmitter 13 instead of a GPS terminal and a CDMA terminal, and the RFID transmitter 13 transmits information (ID) of the bus in response to the RFID reader 41 installed at the station. At this time, the information ID of the bus is a unique value, when the GPS is not installed, the unique ID value of the bus not including the location information is transmitted using the RFID transmitter.

In this case, it is preferable that the RFID transmitter installed on the bus increases the effective transmission distance of the RFID to the maximum by installing an active transmitter so that RFID communication can be performed at a long distance.

The stop 40 is provided with an RFID reader 41 so that the ID value of the bus can be read within a predetermined distance range, and after storing the unique ID value and the lead time of the read bus in the data unit, the bus is stored in the stop. It determines whether it is an entering bus, a passing bus, or a bus across the street, and guides it. The ID of the corresponding bus, the lead time, and the ID of the bus stop are converted into data to form another bus stop (40 ', 40 '').

At this time, the data transmitted to the other station includes the unique value of the transmitting station, the ID value of the leading bus and the lead time, and the station receiving the data enters its own station by comparing the ID value of the leading bus. It determines whether it is a bus and decides whether or not to store it, and transfers the received data to another stop.

Zigbee technology may be used as a technology that can be used for data transmission between stations. If a Zigbee adapter and a Zigbee antenna are installed at each station, the stations that are less than the effective communication distance of Zigbee can exchange data with each other, and each station has a network connection structure like a spider web due to the characteristics of Zigbee, and the situation center (30) The entire network structure is completed by connecting a separate wired / wireless network to the nearest stop.

Zigbee communication may be impossible because the distance between the stop and the stop is longer than the effective communication distance of Zigbee, which is a short-range technology. In this case, the situation can be solved by installing a Zigbee terminal 70 having a Zigbee adapter and an antenna in a traffic light or a street lamp between the corresponding stops.

The situation center 30 maintains a database of inherent values of all buses 10 on which RFID is installed and corresponding route information, and manages Zigbee data of each stop 40 to stop at the corresponding stop. Information can be transferred to and stored at the station. In addition, when the database changes, the data of the station can be updated to establish the data consistency.

In addition, the situation center 30 may collect all the Zigbee data entered through the stop to determine the overall bus operation situation. If each data is timed to find out which bus entered the station, the bus operation management system operated using conventional GPS technology and CDMA technology becomes possible.

FIG. 3A illustrates the components of the stop guide device 40A built in the bus stop 40 of the present system, and FIG. 3B illustrates a configuration diagram of the extended stop guide device with additional components.

The station guide device 40A includes: an RFID reader 41 for reading the RFID value of the bus 10; and a Zigbee antenna 42 for communicating with another station guide device using Zigbee technology; And Zigbee adapter 43; is configured to be installed essentially. In addition, the control unit (44, MCU) for receiving and controlling the operation and data of the RFID reader and Zigbee adapter, the data unit 45 for storing the RFID value and the guide message of the bus, and a power supply unit for supplying power to the devices ( 46), and guides the arrival time of the bus to the passenger using the guide unit 50.

In addition, as illustrated in FIG. 3B, the solar cell 47 and the human body sensor 48 may be additionally configured to construct a stop guide that can be effectively operated with low power.

The controller 44 extracts the ID value of the bus read from the RFID reader 41 or the ID value of the bus from the data transmitted through the Zigbee antenna 42 and stops at the corresponding stop stored in the data unit 45. By checking the ID value list of the bus, it is possible to determine whether or not the corresponding bus stops at the stop. If the bus stops at the bus stop, the estimated time of arrival of the bus can be calculated by using the guide unit 50 to guide the entry of the bus. If the bus just passes without stopping at the bus stop, use the Zigbee antenna. To pass the data for that bus to another stop.

The data unit 45 stores data on an ID value of a bus stopping at a corresponding stop and a movement time of the bus for each stop, particularly when data having an ID value of the corresponding bus is transmitted through another stop. From the data, the intrinsic value of the first shelter and the lead time are extracted, and the controller 44 can calculate the estimated arrival time of the bus through the travel time and the lead time from the first shelter to the corresponding shelter. In particular, the data unit 45 stores the arrival time information of the bus guided to the passenger through the guide unit 50.

In addition, by installing an additional solar cell 47 to generate power using the sunlight during the daytime when the sun rises, to charge the power supply 46 with the generated power, and additionally install the human body sensor 48 Therefore, only when it is determined that there are passengers waiting for the bus at the bus stop, the arrival time of the bus can be guided, thereby making it possible to construct a more efficient bus stop guide device.

The guide unit 50 may be provided with a voice output unit 51 for guiding voice and / or a display unit 52 for guiding through an electric sign or an LCD window, and generally arrives at the bus through the display unit 52. Although the scheduled time is guided, it is preferable that the voice output unit 51 be installed together as a welfare facility for the visually impaired.

In particular, it is preferable to install LEDs on the bus route maps because of the characteristics of the bus stop with the bus route map. If the guide portion is configured as shown in FIG.

4 is an exemplary view of a bus route LED plate installed at a bus stop, wherein an LED bulb 53 is attached to each upstream stop position of the bus route map, and when the bus enters the upstream stop, the light is turned on at the LED bulb of the upstream stop. Is an example of a guide 50 configured to allow passengers to intuitively know where to wait and to what extent the bus is at.

That is, it indicates that the bus of the corresponding line is adjacent to the stop 54 that the LED emits, and the passenger can easily check where the waiting bus is located. In particular, if the bus you have been waiting for has no seats because there are so many people on the bus, you can wisely wait for the next bus if you know that the next bus will be coming soon through our bus route LED board (50A). Too much phenomena can be prevented.

This is because the LED is installed only at the upstream stop because it only displays the buses that have passed by installing the LED bulb at the downstream stop. However, the bus route LED plate provided herein should not be limited to the LED bulb only in the upstream stop.

FIG. 5 illustrates an example in which GPS technology is additionally applied to the improved bus information system configured in FIG. 2, but the bus information system provided in the present application may be operated without using GPS technology. Extracting the correct current position for each bus and transmitting the current position information together with the ID value of the bus through the RFID transmitter, it is possible to obtain a more accurate data value that can increase the reliability of the system.

1 is a conceptual diagram schematically illustrating a configuration of a conventional bus information system.

2 is a conceptual diagram schematically showing the configuration of the improved bus information system of the present application.

3 is a block diagram showing the configuration of a bus stop of the present system.

4 is an exemplary view constituting a bus route LED plate installed at a bus stop.

5 is an exemplary view showing an embodiment in which GPS technology is applied to the present invention.

******* Explanation of the main signs in the drawings *******

10: bus 11: GPS terminal

12: CDMA terminal 13: RFID transmitter

20: mobile communication base station 30: situation center

40: stop 40A: stop guide device

41: RFID reader 42: Zigbee antenna

43: Zigbee Adapter 44: Control Unit (MCU)

45: data portion 46: power supply portion

47: solar cell 48: human body detection sensor

50: guide part 50A: LED plate

51: audio output unit 52: display unit

53: LED bulb 60: satellite

70: Zigbee Terminal

Claims (8)

In the bus information system for guiding the current position or scheduled arrival time of the bus to arrive from passengers waiting for the bus at the bus stop, A bus 10 incorporating an RFID transmitter 13 incorporating a unique ID value; A data unit incorporating an RFID reader 41 for reading information of the RFID transmitter 13, a Zigbee adapter 43 for communicating with another station or another Zigbee terminal, and a unique ID value of a bus stopping at the station. 45), a guide unit 50 for guiding a current position or estimated time of arrival of the bus, a controller 44 for controlling the RFID reader, a Zigbee adapter, a data unit, a guide unit, and a power supply unit 46 for supplying power. The stop 40 is installed, the stop guide device 40A is configured to include; A situation center 30 connected to one of the station guide devices by wire and wireless to determine the overall bus driving situation and to manage data of the station guide device; Bus information system, characterized in that configured to include. The method of claim 1, Transmitting a unique ID value of the bus using the RFID transmitter 13 in the bus 10; In the bus guiding device 40A within the effective distance of the bus and the RFID, when the unique ID value of the bus sent from the RFID transmitter 13 is read, the unique ID of the bus searching for the data unit 45 and stopping at the stop If the value is to guide the arrival through the guide unit 50, and if the unique ID value of the bus that does not stop at the bus stop, the data is converted into a data including the time that led to the unique ID value of the bus and the ID of the lead station Zigbee adapter 43 Transmitting to another stop guide device 40A 'using; In the stop guide device 40A 'which receives data from another stop guide device through the Zigbee adapter 43, after extracting the bus unique ID value from the received data, if the data part is searched and the bus stops at the stop, Using the lead time and the ID value of the lead station, the guide unit 50 guides the scheduled arrival time of the bus. If the unique ID value of the bus does not stop at the station, the data is different as it is using the Zigbee adapter 43. Transferring to the stop guide device 40A ″; The station guide device 40A '' connected to the situation center 30 by wire or wireless determines whether the bus stops at the station from the received data to limit the guidance of the guide unit 50, and transmits all received data to the situation center. Transmitting to; The situation center 30 collects ZigBee data to determine overall bus operation information; Bus information system characterized in that it is operated including. The method of claim 1, The bus 10 is a bus information system, characterized in that the GPS terminal 11 is additionally installed to transmit the unique ID value of the bus and the current location information together through the RFID transmitter. The method of claim 1, The bus information system, which is configured to further include a solar cell 47 in the stop system 40A, so that the solar power can be charged by the power supply unit during the day when the sun rises. The method of claim 1, The bus information system, which is configured such that the human body sensor 48 is additionally included in the stop system 40A, only when it is determined that there is a passenger. The method of claim 1, The guide unit 50 for guiding the current position of the bus or the estimated time of arrival in the bus stop system 40A is output through the display panel, which can be checked by time, and is output by sound and can be confirmed by hearing. Bus information system, characterized in that configured to include a voice output unit (51). The method according to claim 1 or 6, The guide unit 50 or the display unit 52 is provided as a route map LED plate 50A in which the LED bulb 53 is installed at the position of each bus stop picture in the background of the route map of the bus, When the Zigbee data received confirms that the bus of the corresponding line is adjacent to the upstream stop, power is supplied to the LED bulb 53 of the corresponding stop location so that the light can be turned on so that passengers can easily grasp the current location of the bus. Characterized by a bus information system. The method of claim 1, When the situation center 30 needs to correct the data of the bus stop guide due to the introduction of a new bus or the change of a route, the modified bus information system converts the modified data into ZigBee data and transmits the updated data to the bus stop guide.

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