KR102596612B1 - System for detecting disconnection of catenary - Google Patents

Abstract

The present invention relates to a system for detecting disconnection of a tram line, and includes a tram line that applies electricity to the upper collector plate of the subway, and a tension weight that adjusts the tension of the tram line. An acceleration sensor fixed to the tension weight and outputting acceleration data according to movement of the tension weight in a vertical direction; and a disconnection detection propagation unit that compares the acceleration data with a set level and, when it is determined that the tram line is disconnected, generates tram line disconnection information and transmits it wirelessly to the central management server.

Description

Catenary disconnection detection system{SYSTEM FOR DETECTING DISCONNECTION OF CATENARY}

The present invention relates to a system for detecting disconnection of a tram line, and in particular, to a tram line disconnection detection system that detects a disconnection of a tram line and propagates this to a central management server or maintenance person.

The subway is a popular means of transportation in which a current collector provided on the upper surface receives electricity from a overhead line device and moves along the track. A overhead line device is installed on the outside of the track on which the train runs, allowing the train to receive electricity, and a current collector is installed on the upper side of the train so that the train can receive electricity supplied from the overhead line device.

The current collector is largely comprised of a current collector plate that allows the train to run by receiving electricity from the overhead line device by making contact with one side of the overhead line device as the train moves, and a current collector plate that has an elastic force in a roughly diamond shape on the lower side of the current collector plate. It consists of a support part that supports upward.

For reference, the above-mentioned overhead line device allows electricity transmitted from the substation to be supplied to the train through contact with the current collector plate. It is largely composed of pillars installed at regular intervals along the track at a distance from the track, and both ends are different from each other. Each wire is fixed to a support and includes a wire that applies power to the current collector plate, and a tension adjustment device that adjusts the tension of the wire.

Again, the electric wire largely consists of a tram wire that contacts the current collector plate and applies electricity to the current collector plate, a tram wire installed in parallel and spaced apart on the upper side of the tram line, and a dropper installed vertically between the tram wire and the tram line.

The tram line is a key component of the electric wire and plays the role of supplying electricity to the train by making line contact with the current collector plate when the train moves at high speed. Therefore, hard copper wire or cadmium copper wire is used for the electric wire to prevent it from being worn out by the friction force generated by contact with the current collector plate.

Meanwhile, the jog line plays the role of supporting the tram line upward so that it does not sag due to its own weight. Both ends are tensioned by a tension adjustment device to enable it to be maintained horizontally with respect to the ground, and the distance between the tram line and the tram line is By being restrained by droppers with corresponding lengths, the tram lines are maintained in a parallel state by the tram lines.

The important point is that the length of the electric wire may change depending on temperature changes, and the electric wire may be worn and disconnected due to contact with the current collector plate. In order to detect such obstacles in advance, a method of checking the position of the sheave weight through a walking tour or a train tour was used in the past, but there was a problem in that it could not respond quickly when a sudden failure occurred.

As a technology to solve this problem, there is 'Tension Line Automatic Tension Adjustment Device Upper and Lower Position Detection System' published in Korean Patent Publication No. 10-2017-0005297.

As shown in FIG. 1, this 'tream line automatic tension adjustment device tension weight upper and lower position detection system' consists of a strut (10) installed adjacent to the track, a sheave (20) installed on top of the strut (10), a tram line (32), and a tram line. In addition to the electric wire (30) consisting of (34) and the catenary tension adjustment device, upper and lower supports (110a, 110b) installed laterally on the upper and lower sides of the strut (10) so that the tension weight (50) is located between them, Limit switches (120a, 120b) installed on the lower supports (110a, 110b) to detect the vertical position of the tension weight (50) when the tension weight (50) is contacted, and a PLC (130) that generates input/output contact signals. . It includes a tension weight position monitoring PC (150) that monitors the upper and lower positions of the tension weight (50).

In the 'tension weight upper and lower position detection system' including the above-described configuration, the limit switches (120a, 120b) can be installed only by adding a tension weight guide tube (170) that guides the movement of the tension weight (50), and the communication line on the line. Because it must be erected separately, there is a problem that system installation costs increase and installation work becomes complicated. In addition, when the tram line 32 is disconnected, the tension weight 50 moves instantaneously and comes into contact with the limit switch 120b located at the bottom. There is a high risk that the limit switch 120b will be damaged due to the impact at this time. In some cases, when the tram line 32 or the tram line 34 is disconnected, the tension weight 50 is lowered, but the gear of the sheave 20 is caught in the stopper, so the lowering of the tension weight 50 is stopped, and the actual tram line Even though (32) is disconnected, there may be cases where the disconnection of the tram line (32) is not detected.

Republic of Korea Patent Publication No. 10-2017-0005297

Accordingly, the present invention is an invention created to solve the above-mentioned problems, and the main purpose of the present invention is to provide a tram line disconnection detection system that can detect disconnection of the tram line while minimizing the system construction cost and easy system construction,

Furthermore, another purpose of the present invention is to provide a tram line disconnection detection system that can detect disconnection of a tram line and propagate it to the outside without installing a separate communication line on the line.

Another object of the present invention is to provide a catenary line disconnection detection system that can be used in both pulley-type and pulley-type automatic tension adjustment devices,

Furthermore, another purpose of the present invention is to provide a catenary line disconnection detection system that can improve the accuracy of disconnection detection by checking for disconnection of the tram line in different ways.

The tram line disconnection detection system according to the first embodiment of the present invention for achieving the above-mentioned purpose includes a tram line connected to a strut installed along the track, and a pulley fixed to the top of the strut installed in the human section of the tram line and around which the tram line is wound. and a tension weight that is connected to the sheave and a wire rope and adjusts the tension of the tram line,

An acceleration sensor fixed to the tension weight and outputting acceleration data according to movement of the tension weight in the vertical direction;

It is characterized in that it further includes a disconnection detection propagation unit that compares the acceleration data with a set level and generates tram line disconnection information when it is determined that the tram line is disconnected and transmits it wirelessly to the central management server.

In addition, the tram line disconnection detection system including the above-described configuration,

Another feature is that it further includes a central management server that receives the tram line disconnection information, displays the location where the tram line disconnection occurred, and transmits the tram line disconnection information to the facility maintenance terminal at the marked location,

The tram line disconnection information includes identification information of the support pole or the disconnection detection radio unit required to identify the location.

Meanwhile, the tram line disconnection detection system according to the second embodiment of the present invention includes a tram line connected to a support pole installed along the track, and a tension weight that adjusts the tension of the tram line,

an acceleration sensor fixed to the tension weight and outputting acceleration data according to movement of the tension weight in a vertical direction;

a distance detection sensor fixed to the lower part of the tension weight and detecting the distance to a reflective surface located below the tension weight;

The acceleration data is compared to the set level to selectively control the operation of the distance detection sensor, and the distance to the reflective surface obtained from the distance detection sensor is used to determine whether the tram line is disconnected, and wirelessly transmits disconnection detection radio waves to the central management server. It is characterized in that it further includes a part;

Furthermore, the tram line disconnection detection system according to the second embodiment described above wirelessly transmits tram line disconnection information from the disconnection detection radio unit, displays the location where the tram line disconnection occurs, and sends the tram line disconnection information to the facility maintenance worker terminal at the marked location. Another feature is that it further includes a central management server that disseminates disconnection information, and the tram line disconnection information includes identification information of the support pole or the disconnection detection propagation unit necessary to identify the location.

According to the above-described means of solving the technical problem, the catenary line disconnection detection system according to the embodiment of the present invention can detect the disconnection of the tram line just by installing an acceleration sensor, and when the catenary line disconnection is detected, the fact is quickly sent to the central management server through a wireless network. Since it can be transmitted by , it is easy to build the system and has the advantage of being able to detect disconnections in the tram line while minimizing system construction costs.

Furthermore, the tram line disconnection detection system according to another embodiment of the present invention uses a distance detection sensor in addition to the acceleration sensor to double check the tram line disconnection, significantly reducing errors in tram line disconnection detection that may occur due to external force acting on the tension weight. It has the effect of lowering it.

Figure 1 is an exemplary system diagram of the tension weight upper and lower position detection system of a known automatic catenary tension adjustment device.
Figure 2 is an example of the installation position of some components constituting the catenary line disconnection detection system according to an embodiment of the present invention.
Figure 3 is a diagram illustrating the signal transmission flow of some components constituting the catenary line disconnection detection system according to an embodiment of the present invention.
Figure 4 is an example diagram of some blocks constituting a catenary line disconnection detection system according to an embodiment of the present invention.
Figure 5 is an exemplary operation flow diagram of the disconnection detection propagation unit 115 that constitutes the catenary disconnection detection system according to an embodiment of the present invention.

The detailed description of the present invention described below refers to the accompanying drawings, which show by way of example specific embodiments in which the present invention may be practiced to make clear the objectives, technical solutions and advantages of the present invention. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. Also, throughout the detailed description and claims of the present invention, the word 'comprise' and its variations are not intended to exclude other technical features, attachments, components or steps. Other objects, advantages and features of the invention will appear to those skilled in the art, partly from this description and partly from practice of the invention. The examples and drawings below are provided by way of example and are not intended to limit the invention. Moreover, the present invention encompasses all possible combinations of the embodiments shown herein. It should be understood that the various embodiments of the present invention are different from one another but are not necessarily mutually exclusive. Additionally, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the detailed description that follows is not intended to be taken in a limiting sense, and the scope of the invention is limited only by the appended claims, together with all equivalents to what those claims assert, if properly described. Additionally, unless otherwise indicated herein or clearly contradictory to the context, items referred to in the singular include the plural, unless otherwise required by the context. Additionally, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

First, Figure 2 illustrates the installation positions of some components constituting the catenary disconnection detection system according to an embodiment of the present invention.

As shown in Figure 2, a partial configuration of the tram line disconnection detection system according to an embodiment of the present invention includes a tram line 32 connected to a support pole installed along the track, and an upper end of a support pole installed in the human section of the tram line 32. With a general tension adjustment device including a sheave 110 that is fixed and wound around the tram line 32, and a tension weight 105 that is connected to the sheave 110 with a wire rope and adjusts the tension of the tram line 32. Available.

More specifically, the acceleration sensor 120, which constitutes the catenary line disconnection detection system according to an embodiment of the present invention, is fixed to the lower part of the tension weight 105 and is defined as the vertical direction (y-axis direction) of the tension weight 105. ) Outputs acceleration data according to movement to ).

Furthermore, the disconnection detection radio unit 115, which constitutes the tram line disconnection detection system according to an embodiment of the present invention, is fixed to the top of the tension weight 105 and receives acceleration data output from the acceleration sensor 120 connected to the cable. If it is determined that the tram line 32 is disconnected compared to the set level, tram line disconnection information is generated and wirelessly transmitted to the central management server (200 in FIG. 3), which will be described later. The tram line disconnection information may include identification information of the support pole or the disconnection detection propagation unit 115 necessary to identify the location.

If the tram line disconnection detection system further includes a distance detection sensor (123 in FIG. 4) in addition to the acceleration sensor 120 as a means for detecting disconnection of the tram line, the distance detection sensor 123 is the distance detection sensor 123 of the tension weight 105. It is fixedly installed at the bottom and acquires a signal to detect the distance from the reflective surface located below the tension weight 105. Depending on the implementation method, the acceleration sensor 120 and the distance sensor 123 may be fixedly installed at the lower part of the tension weight 105 as an integrated module, and may be separated from each other as different modules and installed at the lower part of the tension weight 105. Each can be fixedly installed. The distance detection sensor 123 can be implemented as an ultrasonic sensor that transmits an ultrasonic signal and receives a reflected signal.

For reference, the reflective surface facing the distance sensor 123 may be the lower support 135 installed laterally on the support, or the reflector 130 located on the upper surface of the lower support 135. .

In the catenary line disconnection detection system including the acceleration sensor 120 and the distance detection sensor 123, the disconnection detection propagation unit 115 first compares the acceleration data with the set level, and operates the distance detection sensor 123 according to the comparison result. By selectively controlling the operation and measuring the distance to the reflective surface using the signal obtained from the distance detection sensor 123, it is possible to determine whether the tram line is disconnected. This will be described later.

In Figure 2, the acceleration sensor 120 and the distance sensor 123 are illustrated as being fixedly installed at the lower part of the tension weight 105. However, if the tram line 32 is disconnected, the horizontal or vertical position changes accordingly. The sensors can be fixedly installed on a structure, rope, or wire to detect a change in position due to a break in the tram line 32. Of course, it may be possible to detect disconnection of the tram line 32 by providing a means for detecting a change in the rotation amount of the sheave 110.

In addition to the above-mentioned sensors 120 and 123, the configuration that can be selectively added to the tram line disconnection detection system according to the embodiment of the present invention will be explained in detail.

First, Figure 3 shows a diagram illustrating the signal transmission flow of some components constituting the catenary disconnection detection system according to an embodiment of the present invention, and Figure 4 shows the configuration of the catenary disconnection detection system according to an embodiment of the present invention. This is an example of some block diagrams.

As shown in Figure 3, the disconnection detection propagation unit 115 of the tram line disconnection detection system according to an embodiment of the present invention transmits the detected tram line disconnection information to a central management server (central management server) that manages the tension and disconnection of the tram line through a low-power wide area communication network. Transmit wirelessly to 200).

The central management server 200 uses signals transmitted from a plurality of disconnection detection propagation units 115 to manage disconnection at each location of the tram line (display fault, store status value, etc.). Of course, the central management server 200 measures the vertical length and horizontal length at each position of the tension adjusting device, and continuously and widely measures the change in tension of the tram line due to linear expansion of the tram line due to temperature changes from each measured length. You can also save, manage, and display it. This information can be provided to managers or maintainers in real time through the application (300, APP) or the Internet (4005, WEB).

Meanwhile, as shown in FIG. 4, the catenary line disconnection detection system according to an embodiment of the present invention includes the acceleration sensor 120 and the disconnection detection propagation unit 115 described above. The disconnection detection propagation unit 115 A controller 111 that compares the acceleration data output from the acceleration sensor 120 with a preset setting level and determines that the tram line 32 is disconnected, and centrally manages the tram line disconnection information generated by the controller 111. It may include a communication unit 113 that transmits wirelessly to the server 200.

The set level can be defined as a level that is pre-measured and set through experiment to detect the acceleration that occurs when the tension weight 105 falls momentarily when the tram line is disconnected.

In addition, the controller 111 transmits its own identification information or the preset identification information of the landowner by including it in the tram line disconnection information so that the central management server 200 can identify and display the location of the tram line where the disconnection occurred. . The power supply unit 117, which is not illustrated in FIG. 4, is a power supply unit including a battery and supplies operating power required for each part of the system.

As a modified embodiment, the catenary line disconnection detection system according to another embodiment of the present invention may include an acceleration sensor 120, a distance detection sensor 123, and a disconnection detection propagation unit 115.

The position of the tension weight 105 may be changed by applying wind or other external force due to the running of a high-speed train. In this case, if only the acceleration sensor 120 is provided, a disconnection of the tram line can be detected by simply comparing the acceleration data generated by the external force described above with the previously described setting level. To overcome these shortcomings, the catenary line disconnection detection system according to another embodiment of the present invention uses a distance detection sensor 123.

The operation of the catenary disconnection detection system in this case will be further explained with reference to FIG. 5.

Figure 5 illustrates an operation flowchart of the disconnection detection propagation unit 115, which constitutes a tram line disconnection detection system including an acceleration sensor 120 and a distance detection sensor 123, as an embodiment of the present invention.

Referring to FIG. 5, first, the controller 111 constituting the disconnection detection propagation unit 115 receives acceleration data from the acceleration sensor 120 (step S100). If the tram line 32 is actually disconnected or a surrounding external force is applied to the tension weight 105, the tension weight 105 will momentarily fall vertically or shake in the side direction. In this case, the acceleration sensor 120 located below the tension weight 105 outputs acceleration data according to the instantaneous movement of the tension weight 105.

The controller 111 compares the received acceleration data with a preset level, that is, a set value to recognize a tram line disconnection (step S110), and activates the distance detection sensor 123 if it is higher than the set value (step S120). . Activation here can be interpreted as transmitting ultrasonic waves through a transmitter that constitutes the distance detection sensor 123.

When the distance detection sensor 123 is activated and ultrasonic waves are transmitted to the reflective surface located below the tension weight 105, the ultrasonic signal reflected through the reflective surface is received through the receiver of the distance detection sensor 123. Accordingly, the controller 111 calculates the distance to the reflective surface using the time information of the ultrasonic signal transmission and reception signals (step S130), and if the calculated value is smaller than another setting value set to detect a disconnection of the tram line ( Step S140) It is determined that the tram line is broken. If the calculated distance to the reflective surface remains above the set value but decreases from the initially set distance, the current tension state of the tram line 32 can be wirelessly transmitted to the central management server 200.

For reference, even when there is no sudden change in acceleration data, the controller 111 may periodically activate the distance detection sensor 123 to check the tension state of the tram line and transmit the result to the central management server 200.

On the other hand, if it is determined that the tram line is disconnected as a result of the determination in step S140, the controller 111 generates tram line disconnection information including identification information of the disconnection detection propagation unit 115 and sends it to the central management server 200 through the communication unit 113. ) is transmitted wirelessly (step S160). In some cases, by adding an alarm sound output unit to the tram line disconnection detection system, the controller 111 may output an alarm sound notifying surrounding tram line disconnection (step S170).

The central management server 200, which has received the tram line disconnection information, determines the location of the tram line where the disconnection occurred through the identification information of the disconnection detection propagation unit 115 included in the tram line disconnection information and sends it to the application 300 or the web 400. By disseminating it to the manager or maintainer's terminal, it is possible to quickly respond to a tram line disconnection.

As described above, the catenary line disconnection detection system according to the embodiment of the present invention can detect the disconnection of the tram line just by installing the acceleration sensor 120, and when the catenary line disconnection is detected, the fact is quickly sent to the central management server ( 200), it is easy to build the system and has the advantage of being able to detect disconnections in the tram line while minimizing system construction costs.

Furthermore, the tram line disconnection detection system according to another embodiment of the present invention uses a distance detection sensor 123 in addition to the acceleration sensor 120 to double check for disconnection of the tram line, which may occur due to external force acting on the tension weight 105. It has the effect of significantly reducing errors in detecting open wires in tram lines.

The present invention has been described above with reference to the embodiments shown in the drawings, but these are merely illustrative examples, and those skilled in the art will understand that various modifications and equivalent embodiments are possible therefrom. For example, in the embodiment of the present invention, the embodiment of the present invention has been described by exemplifying a pulley-type automatic tension adjustment device, but the automatic detection system of the catenary line according to the embodiment of the present invention uses a pulley-type automatic tension adjustment device having a tension weight. It is a system that can be equally applied to devices. Therefore, the true technical protection scope of the present invention should be determined only by the appended claims.

Claims (6)

In the tram line disconnection detection system including a tram line that applies electricity to the upper collector plate of the subway, and a tension weight that adjusts the tension of the tram line,
an acceleration sensor fixed to the tension weight and outputting acceleration data according to movement of the tension weight in a vertical direction;
A disconnection detection propagation unit that compares the acceleration data with a set level and, when it is determined that the tram line is disconnected, generates tram line disconnection information and wirelessly transmits it to the central management server,
A tram line disconnection detection system, characterized in that the tram line disconnection information includes identification information of the support pole or the disconnection detection radio unit required to identify the location. The method according to claim 1, further comprising a central management server that receives the tram line disconnection information, displays the location where the tram line disconnection occurs, and transmits the tram line disconnection information to the facility maintenance worker terminal at the marked location. A tram line disconnection detection system. delete In the tram line disconnection detection system including a tram line that applies electricity to the upper collector plate of the subway, and a tension weight that adjusts the tension of the tram line,
an acceleration sensor fixed to the tension weight and outputting acceleration data according to movement of the tension weight in a vertical direction;
a distance detection sensor fixed to the lower part of the tension weight and detecting the distance to a reflective surface located below the tension weight;
The acceleration data is compared with the set level, the distance detection sensor is selectively controlled according to the comparison result, the distance to the reflective surface obtained from the distance detection sensor is used to determine whether the tram line is disconnected, and the wireless network is sent to the central management server. A tram line disconnection detection system characterized by comprising a disconnection detection radio wave unit that transmits. The method according to claim 4, wherein the central management server receives the tram line disconnection information wirelessly from the disconnection detection propagation unit, displays the location where the tram line disconnection occurs, and transmits the tram line disconnection information to the facility maintenance worker terminal at the marked location; A tram line disconnection detection system further comprising: The system according to claim 5, wherein the tram line disconnection information includes identification information of the support pole or the disconnection detection radio unit required to identify the location.

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