KR100893247B1 - Wireless control device for Personal Rapid Transit - Google Patents

Abstract

The present invention provides a small track that continuously configures a radio cell for transmitting / receiving a radio signal to a small track vehicle in small scale capable of wireless communication, and moves the radio cell by a B-CDMA (Binary Code Division Multiple Access) method. The present invention relates to a wireless control apparatus for a small track vehicle capable of controlling the running of a small track vehicle that travels at high speed by wirelessly communicating with a vehicle. The characteristic configuration includes a vehicle controller 100 installed in the small track vehicle 400; A vehicle B-CDMA module 101 electrically connected to the vehicle controller 100 to convert a signal, and a vehicle antenna 102 electrically connected to the vehicle B-CDMA module 101 to transmit / receive a signal. And, the track sensor 210 installed on one side of the track to sense the small track vehicle 400, the track controller 200 is electrically connected to the track sensor 210 to generate a control signal, The track B-CDMA module 201 electrically connected to the track controller 200 to convert signals and form a small radio cell 200a on the track, and the track B-CDMA module 201 electrically. A track antenna (202) connected to each other to transmit and receive signals; The track controller 200 is provided on a plurality of tracks such that a small number of radio cells 200a capable of accommodating one small tracked vehicle 400 are formed to overlap with adjacent radio cells 200a. The plurality of track controllers 200 are electrically connected to the track computer 300; The track B-CDMA module 201 generates a unique scan code for each small track vehicle 400, and a radio link is established between the track B-CDMA module 101 and the vehicle B-CDMA module 101 only when the scan codes match. Configured to be made.

Compact tracked vehicle, track, wireless, B-CDMA

Description

Wireless control device for small track vehicles {Wireless control device for Personal Rapid Transit}

The present invention relates to a radio control apparatus for a small track vehicle, and more particularly, to configure a radio cell for transmitting / receiving a radio signal continuously in a small scale so as to wirelessly communicate with a small track vehicle, and B-CDMA (Binary). The present invention relates to a small track vehicle wireless control device capable of controlling the running of a small track vehicle traveling at high speed by communicating wirelessly with a small track vehicle moving between radio cells by a Code Division Multiple Access (Code Division Multiple Access) method.

In general, due to the traffic congestion caused by the increase of vehicles, public transportation is widely used in urban environments such as busy downtown areas.

Traditional means of public transportation include buses and taxis on the roads and trains running on top of the tracks.

The bus is effective for transporting large numbers of passengers and the taxi is effective for small number of passengers.

However, these buses and taxis have a problem that is still affected by the traffic jams occur on the road because the road and taxi.

The train traveled on tracks to effectively transport large numbers of passengers and reduce traffic jams, but it was limited to transporting a small number of passengers.

In addition, the train for the purpose of transporting a large number of passengers had a problem that the cost required for its installation and operation increases.

On the other hand, in recent years, the rapid development of science and technology and the improvement of living standards have increased the demand for non-polluting means of transportation, and the representative of such means of transportation is small track vehicles that run on elevated tracks, which are hypothesized to have a certain height on the ground. A system using such a small track vehicle is commonly referred to as a Personal Rapid Transit (hereinafter referred to as a PRT system). The PRT system is equipped with a branching device for branching to a branch to be operated at a branching point and a braking device for stopping where desired.

In other words, trains or tracked vehicles operate in a state in which they cannot leave the track, so in order to change the position from one track to another, conventionally, it is not switched by the body's switching function like a car, but by a special action on the track. It became. Conventional branching devices typically consist of three parts: points, crossings and leads.

As described above, the small track vehicle driven by the PRT system may be a driver in each vehicle. Recently, a device for wirelessly controlling driving and braking of the small track vehicle has been developed and used.

Conventionally, a plurality of base stations (including a base station or an access point serving as a base station) are provided for a track on which a small track vehicle travels, and an area in which the base station can transmit / receive a signal wirelessly is divided into radio cells.

On the other hand, since the radio cell by the base station is formed to accommodate a plurality of small track vehicles, when the plurality of small track vehicles travel in one radio cell, one base station controls the plurality of small track vehicles (driving) And braking).

As described above, in order to control a plurality of small tracked vehicles in one base station, the resources of the base stations are shared so that sophisticated resource control (Media access control) is required to ensure a constant control cycle of the individual vehicles.

In addition, when several small track vehicles attempt to communicate with a base station in an emergency, it is difficult to implement a countermeasure, and when a small track vehicle moves between base stations, it is possible to continuously communicate in the process of moving from one base station to another. There is a problem that excessive cost is generated because a hand-off (hand-off) function is required.

The present invention has been made to solve the above problems, and its object is to continuously configure a small radio cell capable of accommodating one small track vehicle on a track on which the small track vehicle travels, and the B-CDMA module is provided. Provided is a wireless control device for a small track vehicle that can easily control a small track vehicle running at high speed by installing the communication means.

Referring to the characteristic configuration of the present invention for achieving the above object is as follows.

A characteristic configuration of a wireless control apparatus for a small track vehicle according to the present invention is a vehicle controller installed in a small track vehicle, a vehicle B-CDMA module electrically connected to the vehicle controller to convert a signal, and the vehicle B-CDMA module and A vehicle antenna electrically connected to transmit / receive a signal, a track sensor installed at one side of the track to detect the small track vehicle, a track controller electrically connected to the track sensor to generate a control signal, and the track A track B-CDMA module electrically connected to the controller to convert signals and form a small radio cell on the track, and a track antenna electrically connected to the track B-CDMA module to transmit / receive signals; ; The track controller is provided with a plurality of track controllers so that a small radio cell capable of accommodating one small tracked vehicle is formed so as to overlap with an adjacent radio cell, and the plurality of track controllers are electrically connected to the track computer. Connected; The track B-CDMA module is configured to generate a unique scan code for each small track vehicle and to establish a radio link with the vehicle B-CDMA module only when the scan codes match.

As described above, the present invention can safely control the running of a small track vehicle running at high speed by installing a small number of radio cells on a track in a continuous overlap and wirelessly communicating with a small track vehicle and a binary code division multiple access (B-CDMA) method. There is a distinctive effect.

In addition, the present invention is able to reduce the cost by continuously exchanging information with a small tracked vehicle traveling without using the hand-off function, as well as to configure a wireless cell using a small output, according to the law (propagation method) There is a unique effect of minimizing the restrictions.

Referring to the present invention having such characteristics in detail as follows.

1 is a schematic view showing a small track vehicle according to the present invention, Figure 2 is a block diagram showing a radio control device for a small track vehicle according to the present invention, Figure 3 is an operation of the radio control device for a small track vehicle according to the present invention It is a schematic diagram for explaining.

As described herein, in the small track vehicle 400, a vehicle controller 100 capable of controlling (driving and braking) the small track vehicle 400 is installed, and the vehicle controller 100 is provided in the small track vehicle 400. The vehicle B-CDMA module 101 for converting signals is electrically connected.

The features of the B-CDMA technology used in the B-CDMA module 101 are as follows.

Code division multiple access (CDMA) technology has attracted a lot of attention due to its high transmission rate and interference cancellation effects from other systems. The implementation of this technology includes a VSG-CDMA system that varies spreading gains, MC-CDMA systems using multiple codes of four parallel branches are known to be the most common. The technique of using multiple codes in this case has the advantage that there is no change in spread gain and no increase in bandwidth, but it is not suitable for small devices due to high power consumption because it needs to guarantee the linearity of the amplifier for amplifying the multilevel signal. To overcome this point, binary-CDMA technology has been proposed.

The feature of this technique is to convert the transmit power of CDMA to several levels to eliminate instantaneous changes. In the CDMA system, signals of several channels are linearly summed and transmitted at the same time, and thus the number of output signals increases as the number of channels increases, thereby forming a multi-level signal.

Instead of transmitting the spread multilevel data as it is, the modulator transmits the converted binary signal through the level clipper. This results in a simple representation of complex multi-level signals, simplifying the representation of the transmitted signal waveform and simplifying the structure of the receiver. However, errors caused by clipping multi-level signals are a factor of degrading the performance of the system.

By clipping the multi-level signals generated by the multiple code scheme, the system structure can be simplified, and a high data rate capable of transmitting images and high-speed data using the multiple code scheme can be obtained.

The vehicle B-CDMA module 101 is provided with a vehicle antenna 102 for wirelessly transmitting the converted signal or wirelessly receiving an externally generated signal.

On the other hand, a track sensor 210 for detecting the small track vehicle 400 is installed on one side of the track on which the small track vehicle 400 travels, the track sensor 210 is a track controller for generating a control signal It is electrically connected to 200.

The track controller 200 is electrically connected to a track B-CDMA module 201 for forming a small radio cell 200a on the track, and converted to the track B-CDMA module 201. There is provided a track antenna 202 for wirelessly transmitting the received signal or wirelessly receiving an externally generated signal.

In addition, the track controller 200 is provided in plural so that a plurality of radio cells 200a are formed on the track, and the track controller 200 is electrically connected to the track computer 300.

When a plurality of track controllers 200 are provided, it is preferable to install the tracks 200 in close proximity so that the radio cells 200a formed by the track controllers 200 overlap with the adjacent radio cells 200a.

Referring to the present invention configured as described in detail as follows.

The small track vehicle 400 of the present invention is to run while being guided by the track, unlike the railroad system operated according to the timetable, the vehicle is driven at the request of a passenger, and the driving interval between the small track vehicle 400 and the front / back It is short (about 3 seconds) and has a number of routes that can be changed from time to time depending on the track and traffic conditions.

On the other hand, when passengers get on and off, they use the stop provided on the branch line (the track where the train parks) instead of the main line (the track on which the train runs). The small track vehicle 400 is capable of unmanned operation (automatic control).

In order to satisfy the dynamic driving characteristics of the small track vehicle 400 as described above, the present invention provides a method for the small track vehicle 400 between the small track vehicle 400 and the control means for controlling the small track vehicle 400. It is to transmit / receive wirelessly various driving information and control information necessary for driving.

A wireless link for exchanging driving information and control information between the small track vehicle 400 and the control means is made between the master B-CDMA module 101 and the slave track B-CDMA module 201.

That is, the vehicle controller 100 installed in the small track vehicle 400 periodically generates a synchronization signal when the small track vehicle 400 is in operation, and after the synchronization signal is converted by the vehicle B-CDMA module 101. Transmitted via the vehicle antenna 102.

On the other hand, when the small track vehicle 400 is detected by the track sensor 210 installed on the track, the track sensor 210 transmits the detection signal to the track controller 200, at this time, the track controller 200 ) Detects that the small track vehicle 400 has entered the wireless cell 200a which is its area.

The track antenna 202 receives the synchronization signal transmitted from the vehicle antenna 102 and the received synchronization signal is converted by the track B-CDMA module 201 and then transmitted to the track controller 200. The vehicle controller 100 and the track controller 200 installed in the small track vehicle 400 perform synchronization of a radio link.

When performing the radio synchronization, the track controller 200 is unique to the vehicle assigned to the entering small track vehicle 400 to prevent frequency collision with another track controller 200 forming the adjacent radio cell 200a. The track B-CDMA module 201 is notified to the track B-CDMA module 201 before the small track vehicle 400 enters the inside of the radio cell 200a. Generates a scan code using ID information.

If the scan codes match, the vehicle B-CDMA module 101 and the track B-CDMA module 201 are synchronized, and the radio link is opened.

On the other hand, if the scan codes do not match, the scan operation for searching for the vehicle B-CDMA module 101 having the same scan code is repeated, and since the scan codes do not cause a frequency collision between different signals, the neighbors are continuously Interference between the track B-CDMA modules 201 can be prevented.

In addition, since the wireless link is connected only while the vehicle is present through the track sensor 210, it is possible to prevent interference due to unnecessary radio signal generation.

The time at which data can be transmitted / received in each radio cell 200a is shown in Equation 1.

[Equation 1]

For example, when the size of the radio cell 200a is 10 m and the speed of the small track vehicle 400 is 60 km / h, the time for which the small track vehicle 400 stays in each radio cell 200a is about 0.6 seconds ( 600ms), it is necessary to hold the wireless synchronization within this time and open the wireless link to send and receive the information necessary for control.

Most wireless technologies currently in service take several seconds to several tens of seconds to establish a wireless link, and thus the present invention cannot be used for the above purposes. It is to quickly synchronize the vehicle controller 100 and the track controller 200 installed on the track.

In addition, since a new radio link is synchronized with each radio cell 200a, information can be continuously transmitted / received without implementing a handoff.

The process of transporting passengers to their destinations is described below.

First, when the passenger calls the small track vehicle 400, the central computer (not shown) allocates one of the assignable small track vehicles 400 to the passenger and at the same time searches for a route from the starting point to the destination to the optimum route. Calculate The small orbital vehicle 400 is allocated at a platform in which a passenger is located among an empty small orbital vehicle 400 or a small orbital vehicle 400 which is the destination of the current station and a small orbital vehicle 400 which is stopped in the waiting area. It is made in the order of the nearest small track vehicle (400).

On the other hand, the central computer controls the track computer 300 to which the plurality of track controllers 200 are connected when moving the empty compact track vehicle 400 to the platform where the passenger is located or to the destination after the passenger boards. The track computer 300 controls the track controller 200 to safely move the small track vehicle 400 to a destination according to a predetermined driving mode.

At this time, a plurality of small track vehicles 400 running on the track is to adjust the distance between the vehicle to maintain a minimum safety distance and travel at a predetermined time interval, in this case, the track computer 300 follows the small track vehicle to follow The small track vehicle (200) through the feedback loop (Feedback loop) to drive the small track vehicle 400 in the state of securing the minimum safety distance by continuously calculating the speed of the speed 400 and the leading small track vehicle (400) 400 transmits the speed control information. In addition, the vehicle interval control is continued even during branch and confluence control by transmitting a control signal for safe branching and joining of the small track vehicle 400 traveling on the main and branch lines.

The track computer 300 collects and transmits driving information of the small track vehicle 400 driving the track so that the central computer can check the driving information of the small track vehicle 400 driving the track.

1 is a schematic view showing a small track vehicle according to the present invention.

Figure 2 is a block diagram showing a radio control device for a small track vehicle according to the present invention.

Figure 3 is a schematic diagram for explaining the operation of the radio control device for a small track vehicle according to the present invention.

※ Explanation of symbols about main part of drawing ※

100: vehicle controller 101: vehicle B-CDMA module

102 vehicle antenna 200 track controller

200a: wireless cell 201: B-CDMA module for tracks

202: track antenna 210: track sensor

300: track computer 400: small track vehicle

Claims (3)

A vehicle controller 100 installed in the small track vehicle 400, a vehicle B-CDMA module 101 electrically connected to the vehicle controller 100 to convert a signal, and the vehicle B-CDMA module 101. A vehicle antenna 102 electrically connected to and connected to the track sensor 210 installed at one side of the track to detect the small track vehicle 400 and electrically connected to the track sensor 210. A track controller 200 for generating a control signal, and a track B-CDMA module 201 electrically connected to the track controller 200 to convert a signal and form a small radio cell 200a on the track. And a track antenna 202 electrically connected to the track B-CDMA module 201 to transmit / receive a signal; The track controller 200 is provided on a plurality of tracks such that a small number of radio cells 200a capable of accommodating one small tracked vehicle 400 are formed to overlap with adjacent radio cells 200a. The plurality of track controllers 200 are electrically connected to the track computer 300; The track B-CDMA module 201 generates a unique scan code for each small track vehicle 400, and a radio link is established between the track B-CDMA module 101 and the vehicle B-CDMA module 101 only when the scan codes match. Radio control device for a small track vehicle, characterized in that to be made. delete delete

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