KR20020077668A - Alarm device for approaching of train using GPS and method thereof - Google Patents

Abstract

PURPOSE: A portable alarm device about the access of a train using a GPS(global positioning system) and a control method thereof are provided to prevent accidents by facilitating an accurate position calculation of a receiver and a transmitter. CONSTITUTION: The control method of the portable train access alarm device using a GPS comprises the steps of; grasping a position of a transmitter from GPS data; producing difficulties and train information; encoding and saving data about the position of the transmitter and train information; transmitting the data if a request of transmission is input; grasping a position of a receiver from the GPS data; restoring the position information of the transmitter/receiver and the train information; calculating a distance from the received information after correcting data errors; comparing line information; and producing audio or visual alarms if a danger of an impact is detected.

Description

Alarm device for approaching of train using GPS and method

The present invention relates to the field of train access warning system, and more specifically, it is easy to calculate the exact position of the transmitter and the receiver by using the GPS signal, and the line discrimination can be made together to prevent the safety accident in advance. The present invention relates to a portable train approach alarm device and a control method thereof.

Railroads are special ground transportation paths that allow railroad vehicles driven by mechanical power to travel on steel tracks to transport people and goods, and are divided into single track, double track and double track according to the number of tracks.

The Korean railroad was inaugurated by opening 33 km between Noryangjin and Jemulpo (Incheon) on the Gyeongin Line on September 18, 1899.After the government's establishment, the railroad business began to build industrial railways, mass production of domestic passenger cars and vehicles. Innovative developments have been made in the fields of introduction, the PCization of railway sleepers, the modernization of shipboard equipment, and the scientificization of signal and communication facilities.

In general, railways are insulated at intervals of a certain distance (approximately 1 km to 2 km), and electrical signals of direct current or alternating current flow in each section. If an abnormality occurs in a line and the above electrical signals are disturbed, The emergency lamps installed next to the tracks are automatically turned on to warn the engineer of the railway vehicle to prevent the railway vehicle from entering the section and causing a safety accident.

On the other hand, the current railway is aging in many existing tracks, and work to repair them is performed in parallel. In this case, when the worker repairs the railway track, a long conductor bar is provided on both tracks of the work section. By short-circuiting the wires, the electric signals flowing along the tracks are intentionally disturbed, so that the emergency lights installed next to the tracks are turned on to prevent the railway cars from entering the work zone so that workers can be protected from safety accidents. .

However, the method of forcibly shortening both tracks in this way prevents the vehicle from entering the work zone and protects the workers.However, the worker cannot recognize that the vehicle is in close proximity to the work zone. There is a problem that prevents the vehicle from communicating smoothly because it can not be stopped and avoided so that the vehicle can pass.

Due to this problem, the radio wave transmitting device is fixedly installed in the direction of travel in locomotives and other power vehicles (motor vehicles, detection cars, track repair equipment, etc.) to transmit radio waves toward the front of the train using a directional antenna. The use of the terminal equipment in the form of belongings that can be worn on the helmet or the seat belt of the worker working on the track is the Korean Utility Model Registration No. 219500 (Registration date: January 2001) 29, the "Train Approach Warning System".

However, the above-mentioned train approach alarm device uses only radio waves, so that accurate position calculation of the transmitter and receiver is relatively difficult, and line discrimination is not made, resulting in a high incidence of safety accidents.

An object of the present invention is to solve such a conventional problem, it is easy to calculate the exact position of the transmitter and the receiver by using the GPS signal, and also to distinguish the line by making the GPS to prevent the safety accident in advance, The present invention provides a portable train approach alarm device and a control method thereof.

1 is a state diagram of the use of the portable train approach warning device using GPS according to an embodiment of the present invention.

2 is a block diagram of a transmitter of a portable train approach warning apparatus using GPS according to an embodiment of the present invention.

3 is a block diagram of a receiver of a portable train approach warning device using GPS according to an embodiment of the present invention.

4 is a flowchart illustrating a transmission operation of a control method of a portable train access warning apparatus using GPS according to an embodiment of the present invention.

5 is a flowchart illustrating a receiving operation of a control method of a portable train access warning apparatus using GPS according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10 transmitter 11: acceleration sensor

12, 32: AD converter 13, 33: keyswitch

14, 34: GPS receiver 15: transmission control unit

16, 36: oscillator 17: modulator

18, 38: filter 19: RF amplifier

35: reception control section 37: demodulator

As a means for achieving the above object, the configuration of the apparatus of the present invention comprises a transmitter and a receiver for transmitting and receiving data wirelessly,

The transmitter includes an acceleration sensor for detecting a speed of a train, an AD converter for converting and transmitting a signal of the acceleration sensor into a digital signal, a key switch for allowing a user to input commands and data, and a GPS satellite. A GPS receiver for receiving a signal, a transmission control means for calculating the position of the transmitter from the signal input from the GPS receiver, calculating train information from the signal input from the AD converter, and synthesizing it as a transmission data signal; And an oscillator for generating a carrier signal, a modulator for modulating the above-described transmission data signal and a carrier signal, and an RF amplifier for high frequency amplification required for transmission through a transmission antenna.

The receiver includes a key switch for inputting commands and data by the user, a GPS receiver for receiving a signal of a GPS satellite, an LNA for amplifying a weak high frequency signal detected through a reception antenna, and a received data signal. And a demodulator for separating the carrier signal, an oscillator for making an RF signal for use in the demodulator, a position of the receiver from the signal input from the GPS receiver, and train information from the signal input from the demodulator. And receiving control means for calculating the line information and outputting an alarm signal when there is a risk of collision, and an alarm means for displaying the alarm signal.

As a means for achieving the above object, the configuration of the control method of the present invention comprises the steps of: receiving GPS data from a GPS satellite to determine the position of the transmitter from the received GPS data, generating fault and train information; Encrypting and storing data relating to the position and train information of the transmitter; determining whether there is a transmission request; transmitting data when there is a transmission request; receiving GPS data from a GPS satellite, and receiving the GPS data from the received GPS data. Determining the position of the receiver; receiving data to restore the transceiver position information and train information; calculating a separation distance from the received information after correcting the data error; comparing line information; If there is a collision risk, it is determined whether there is a collision risk from the separation distance and line information. Visual, audible, it comprises the steps of: operating the visual alert.

DETAILED DESCRIPTION Hereinafter, the most preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. . Other objects, features, and operational advantages, including the object, operation, and effect of the present invention will become more apparent from the description of the preferred embodiment.

For reference, the embodiments disclosed herein are only presented by selecting the most preferred embodiment in order to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only by this embodiment Rather, various changes, additions, and changes are possible within the scope without departing from the spirit of the present invention, as well as other equivalent embodiments.

The configuration of the transmitter 10 of the portable train approach warning device using the GPS according to an embodiment of the present invention, as shown in Figures 1 and 2, the acceleration sensor 11 for detecting the speed of the train and The AD converter 12 converts and transmits the signal of the acceleration sensor 11 into a digital signal, a key switch 13 for the user to input a command and data, and a signal of the GPS satellite 20. The GPS receiver 14 for receiving, the position of the transmitter is calculated from the signal input from the GPS receiver 14, train information is calculated from the signal input from the AD converter 12, and synthesized as a transmission data signal. The transmission control unit 15 to send out, the oscillator 16 for generating a carrier signal, the modulator 17 which modulates the said transmission data signal and a carrier signal, and the noise are filtered out. And for the filter 18, it comprises an RF amplifier 19 for amplifying the high frequency required for transmission via the transmitting antenna.

As shown in FIGS. 1 and 3, the receiver 30 of the portable train access warning device using GPS according to an embodiment of the present invention has a key switch 33 for allowing a user to input commands and data. ), A GPS receiver 34 for receiving a signal of the GPS satellite 20, an LNA 39 for amplifying a weak high frequency signal detected through the reception antenna, and a filter 38 for filtering out noise. And an demodulator 37 for separating received data signals and carrier signals, an oscillator 36 for making an RF signal for use in the demodulator 37, and an AD converter for converting RSSI values input from the demodulator 37 into digital values. And the position of the receiver from the signal input from the GPS receiver 34 and train information from the signal input from the demodulator 37. Receiving control unit 35 that calculates distance and line information and outputs an alarm signal when there is a risk of collision, vibration motor 31a and buzzer 31b for displaying the alarm signal as tactile, auditory and visual signals. ), The notification LED 31c is included.

The transmitter 10 is installed in front of the traveling direction of the train, and the receiver 30 is made compact so that users can carry it.

As shown in FIG. 4, the transmission control method of the portable train access warning apparatus using GPS according to an embodiment of the present invention includes the steps of starting operation (S10) and GPS from the GPS satellite 20. Receiving data (S20), identifying the position of the transmitter 10 from the received GPS data (S30), setting the position coordinates of the transmitter 10 (S40), and the obstacle and train information Generating (S50), encrypting and storing data relating to the location and train information of the transmitter 10 (S60), determining whether there is a transmission request (S70), and when there is a transmission request And a step (S90) of sending data to the terminal and ending the operation (S90).

As shown in FIG. 5, the reception control method of the portable train approach warning apparatus using GPS according to an embodiment of the present invention includes the steps of starting operation (S100) and GPS from the GPS satellite 20. Receiving data (S200), identifying the position of the receiver 30 from the received GPS data (S300), setting the position coordinates of the receiver 30 (S400), and receiving the data Step S500, restoring transceiver position information and train information S600, correcting a data error S700, calculating a separation distance from the received information S800, and line information Comparing with step S900, Determining whether there is a collision risk from the separation distance and line information (S1000), and if there is a collision risk, the step of tactile, auditory, and visual alarm operation (S1100) It is done by

According to the above configuration, the operation of the portable train approach warning device and control method using the GPS according to an embodiment of the present invention is as follows.

When the operation of the transmitter 10 starts (S10), the GPS receiver 14 receives GPS data from the GPS satellite 20 and transmits it to the transmission control unit 15 (S20).

The GPS receiver 14 can measure the exact time and distance from three or more GPS satellites 20 to accurately calculate the current position by triangulation of three different distances, which are globally known as Global Positioning System (GPS). That is, it is called satellite navigation system. Unlike a compass, a satellite navigation system can obtain accurate time with latitude, longitude, and altitude as well as three-dimensional velocity information. The accuracy of position varies between military and civilian use. For civilian use, the horizontal and vertical error is about 10-15m and the speed measurement accuracy is 3cm per second. GPS is currently applied in a wide range of fields from simple location information to automatic navigation and traffic control of aircraft, ships and cars, collision prevention of oil tankers, precise surveying of large-scale civil engineering works, and mapping. It is developed variously to dragon.

The transmission control unit 15 determines the position of the transmitter 10 from the GPS data received from the GPS receiver 14 in this manner (S30), and then sets the position coordinates of the transmitter 10 (S40).

Subsequently, the transmission control unit 15 uses the information signal for the speed of the train input from the acceleration sensor 11 through the AD converter 12 and the information signal for the line line input from the train operation control unit (not shown). By generating fault and train information (S50), the data on the location and train information of the transmitter 10 is encrypted and stored (S60). In this case, a xylo sensor may be used instead of the above-described acceleration sensor 11.

Next, the transmission control unit 15 determines whether there is a transmission request (S70), and if there is a transmission request, transmits the transmission data to the carrier signal using the modulator 17 and transmits it via the transmission antenna (S80). The operation ends (S90).

On the other hand, when the operation of the receiver 30 starts (S100), the GPS receiver 34 receives GPS data from the GPS satellite 20 and transmits it to the reception control unit 35 (S200).

The reception control unit 35 determines the position of the receiver 30 from the GPS data input from the GPS receiver 34 (S300), and then sets the position coordinates of the receiver 30 (S400).

Next, the reception control unit 35 is detected by the reception antenna and amplified while passing through the LNA 39, and the noise is removed while passing through the filter 38 to receive data separated from the carrier by the demodulator 37 (S500). ), Restore the transceiver location information and train information (S600).

At the same time, the reception control unit 35 corrects the data error (S700), calculates a separation distance from the received information (S800), and compares the line information (S900).

The reception control unit 35 determines whether there is a collision risk from the calculated separation distance and line information (S1000), and when there is a collision risk, the vibration controller 31a, the buzzer 31b, and the notification LED 31c. By using the tactile, auditory, and visual alarm operation, the person carrying the receiver 30 can know that the train is approaching (S1100).

As described in the above embodiment, the present invention, by using the GPS signal, it is easy to calculate the exact position of the transmitter and the receiver, it is possible to prevent the safety accident in advance by making the line discrimination also.

Claims (2)

It consists of a transmitter and a receiver for transmitting and receiving data wirelessly, The transmitter includes an acceleration sensor for detecting a speed of a train, an AD converter for converting and transmitting a signal of the acceleration sensor into a digital signal, a key switch for allowing a user to input commands and data, and a GPS satellite. A GPS receiver for receiving a signal, a transmission control means for calculating the position of the transmitter from the signal input from the GPS receiver, calculating train information from the signal input from the AD converter, and synthesizing it as a transmission data signal; And an oscillator for generating a carrier signal, a modulator for modulating the above-described transmission data signal and a carrier signal, and an RF amplifier for high frequency amplification required for transmission through a transmission antenna. The receiver includes a key switch for inputting commands and data by the user, a GPS receiver for receiving a signal of a GPS satellite, an LNA for amplifying a weak high frequency signal detected through a reception antenna, and a received data signal. And a demodulator for separating the carrier signal, an oscillator for making an RF signal for use in the demodulator, a position of the receiver from the signal input from the GPS receiver, and train information from the signal input from the demodulator. Portable train access warning device using GPS, characterized in that it comprises a receiving control means for calculating the line information and outputting an alarm signal when there is a risk of collision, and an alarm means for displaying the alarm signal. Receiving GPS data from the GPS satellites to determine the position of the transmitter from the received GPS data; Generating fault and train information, Encrypting and storing data relating to the location and train information of the transmitter; Determining whether there is a transmission request and transmitting data when there is a transmission request; Receiving GPS data from the GPS satellites to determine the position of the receiver from the received GPS data; Restoring transceiver location information and train information by receiving data; Calculating a separation distance from the received information after correcting the data error; Comparing the line information, Judging whether there is a collision risk from the separation distance and the line information, the control method of the portable train approach alarm device using GPS, characterized in that it comprises the step of tactile, auditory, visual alarm operation in the case of a collision risk .