KR102480555B1 - Wireless monitoring sensor device for monitoring railway power line - Google Patents

Abstract

The present invention proposes a wireless monitoring sensor device for monitoring the state of a railroad power line. A wireless monitoring sensor device for monitoring the state of a railway power line according to an embodiment of the present invention includes one or more sensors; an ADC that digitally processes the sensed values of the at least one sensor; a wireless communication module for transmitting the digitized sensing value through wireless data communication; and an energy harvester supplying power to the sensor, ADC, and wireless communication module and having an opening formed therein so that the railway power line passes through, wherein the energy harvester produces power based on the magnetic field of the railway power line. do.

Description

Wireless monitoring sensor device for monitoring railway power line conditions {WIRELESS MONITORING SENSOR DEVICE FOR MONITORING RAILWAY POWER LINE}

The present invention relates to a wireless monitoring sensor device for monitoring railway power line conditions.

As the deterioration of railway facilities intensifies, maintenance work is underway, but the performance of improvement has not caught up with the speed of deterioration, and maintenance costs are expected to increase rapidly in the future.

Major facilities to be monitored around railroads include off-site underground power cables, off-site power facility junction boxes, and essential multi-use mechanical facilities in the station, and in case of failure to detect and prevent abnormalities, there is a high risk of a major accident.

In particular, in the case of power facilities, 80% of failures occur at power cable connection points (contact points, connection box busbars, etc.), so the need for constant monitoring is very high.

However, a wired monitoring system is currently the only system capable of monitoring this, and the wired monitoring system combines a sensor with a target object, supplies power in a wired manner, collects data through a wired communication method, and calculates monitoring results. Such a wired monitoring system requires installation of power lines and communication lines in the process of coupling the system to each object, so it requires a considerable amount of time and money, so it is a technology that is practically impossible to apply.

On the other hand, in this regard, Korean Patent Registration No. 10-1176497 (title of invention: Power quality monitoring device in railway power system), a voltage and current detector installed on the power supply and load side to detect voltage and current values, and A signal input unit that receives signals applied from the voltage and current detectors, a signal conversion unit that converts analog signals applied from the signal input unit into digital signals, a data storage unit that stores data received in real time, and a data storage unit that records the collected data. a memory comprising a data recording unit; The display unit that displays the monitored data on the screen, receives the current and voltage values detected in real time from the power supply source and the load side, monitors the change trend, stores the power flow and amount of power supplied, and sends them to a remote location through a communication module. A configuration of a control unit that transmits and processes information is disclosed.

The present invention is to solve the above-mentioned problems of the prior art, and monitors the condition of a railway power line that can be driven without supplying wired power by receiving electrical energy using induction power induced by a magnetic field formed along the railway power line. It is an object of the present invention to provide a wireless monitoring sensor device that does.

However, the technical problem to be achieved by the present embodiment is not limited to the technical problems described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, a wireless monitoring sensor device for monitoring a state of a railway power line according to a first aspect of the present disclosure includes one or more sensors; an ADC that digitally processes the sensed values of the at least one sensor; a wireless communication module for transmitting the digitized sensing value through wireless data communication; and an energy harvester supplying power to the sensor, ADC, and wireless communication module and having an opening formed therein so that the railway power line passes through, wherein the energy harvester produces power based on the magnetic field of the railway power line. do.

On the other hand, the wireless monitoring sensor device for monitoring the state of the railway power line according to the second aspect of the present invention includes a sensor having an opening formed therein so that the railway power line passes through; an ADC that digitally processes the sensed value of the sensor; a wireless communication module for transmitting the digitized sensing value through wireless data communication; and an energy harvester supplying power to the sensor, ADC, and wireless communication module and having an opening formed therein so that the railway power line passes through, wherein the energy harvester produces power based on the magnetic field of the railway power line. And the sensor is coupled to the front of the energy harvester to have a concentric circle structure.

According to the above-mentioned problem solving means of the present application, there is an effect that can be driven without supplying power through a wire by receiving electric energy using induction power induced by a magnetic field formed along a railway power line.

1 is a diagram of a wireless monitoring sensor device for monitoring the state of a railway power line according to an embodiment of the present invention.
2 is a diagram of an energy harvester of a wireless monitoring sensor device for monitoring the state of a railway power line according to an embodiment of the present invention.
3 is a graph showing a magnetic saturation state according to the presence or absence of an air gap of an energy harvester according to an embodiment of the present invention.
Figure 4 is a view for explaining the combination of the housing of the wireless monitoring sensor device for monitoring the railway power line state according to an embodiment of the present invention.
5 is a perspective view of a wireless monitoring sensor device for monitoring the state of a railway power line according to another embodiment of the present invention.
6 is a diagram showing an open state of a wireless monitoring sensor device for monitoring a railroad power line state according to another embodiment of the present invention.

Hereinafter, embodiments of the present application will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. And in order to clearly describe the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is said to be "connected" to another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element in between. do.

Throughout the present specification, when a member is said to be located “on” another member, this includes not only a case where a member is in contact with another member, but also a case where another member exists between the two members.

Throughout the present specification, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated. As used throughout this specification, the terms "about," "substantially," and the like are used at or approximating that value when manufacturing and material tolerances inherent in the stated meaning are given, and do not convey the understanding of this application. Accurate or absolute figures are used to help prevent exploitation by unscrupulous infringers of the disclosed disclosure.

The present application relates to a wireless monitoring sensor device for monitoring the state of a railway power line, and may be installed in off-site underground power cables, off-site power facility junction boxes, and essential multi-use machine facilities in stations, but is not limited thereto.

1 is a diagram of a wireless monitoring sensor device for monitoring a railroad power line state according to an embodiment, and FIG. 2 is a diagram of an energy harvester of a wireless monitoring sensor device for monitoring a railroad power line state according to an embodiment of the present invention. 3 is a graph showing the magnetic saturation state according to the presence or absence of an air gap of the energy harvester according to an embodiment of the present invention, and FIG. 4 is a wireless monitoring sensor device for monitoring the railway power line state according to an embodiment of the present invention. 5 is a perspective view of a wireless monitoring sensor device for monitoring the state of a railroad power line according to another embodiment of the present invention, and FIG. 6 is a state of a railroad power line according to another embodiment of the present invention. It is a diagram showing the open state of the wireless monitoring sensor device that monitors.

First, a wireless monitoring sensor device 10 (hereinafter, referred to as 'wireless monitoring sensor device 10') for monitoring the state of a railroad power line according to an embodiment of the present application will be described.

Referring to FIG. 1, the wireless monitoring sensor device 10 includes one or more sensors 110, an ADC (120, Analog-digital converter) for digitally processing the sensed values of the one or more sensors 110, and the digitized sensed values wirelessly. An energy harvester that supplies power to the wireless communication module 130, the sensor 110, the ADC 120, and the wireless communication module 130 that transmit data through data communication, and has an opening formed therein so that the railway power line passes through. (140). In addition, although not shown, a storage unit such as a battery or capacitor for storing generated power and a circuit unit for charging and managing power may be further included. In other words, the overall shape of the wireless monitoring sensor device 10 may be formed in a donut shape, and may be positioned so that a railroad power line passes through an opening formed in a central portion. At this time, since a magnetic field is formed around the railway power line, power is generated in the energy harvester 140 using this, and the generated power is supplied to the sensor 110, the ADC 120, and the wireless communication module 130. can

On the other hand, the sensor 110 is a temperature sensor for detecting temperature, an acceleration sensor for detecting acceleration of an object, a cable insulation void defect occurring in a railway power line, a metal foreign substance, an electric tree, a residual conductive layer defect, and a cable connection part construction defect. It may include, but is not limited to, at least one of a PD (Partial Discharge) sensor for detecting partial discharge caused by damage to a railway power line and an EM (Elasto-Magnetic) sensor for detecting stress of an object.

The ADC 120 is a device that converts an electrical analog quantity into a digital quantity, and converts the sensor value of an analog quantity transmitted from the sensor 110 into a sensor value of a digital quantity and transmits it to the wireless communication module 130. Since the digital-to-analog converter (ADC) is a general technology, a detailed description thereof will be omitted.

The wireless communication module 130 may transmit the digitized sensing value to a management server that monitors the state of a target facility or collects and manages related information through wireless data communication.

Referring to FIG. 2 , the energy harvester 140 may generate power based on a magnetic field of a railroad power line. To this end, the energy harvester 140 includes a first core 141, a coil 142 wound around the first core 141, and both ends facing both ends of the first core 141, and the first core ( 141) may include a second core 143 that is spaced apart from both ends by a predetermined distance and provides a space for the railroad power line to pass through.

In addition, both ends of the first core 141 may extend downward, and a coil 142 may be wound around the central portion. In addition, the second core 143 is formed in a 'U' shape, and both ends may be positioned to face portions extending downward from the first core 141 . For example, the first core 141 and the second core 143 are preferably formed of a ferrite material having high induced voltage characteristics even in a low load state.

Also, the first core 141 and the second core 143 may be spaced apart by a predetermined distance (air gap).

Referring to FIG. 3, when the first core 141 and the second core 143 are spaced apart by a predetermined distance compared to the case where there is no gap between the first core 141 and the second core 143, Due to the relief of magnetic saturation, it is expected to increase power generation efficiency and reduce heat and vibration generation.

On the other hand, the wireless monitoring sensor device 10 surrounds the first core 141, the coil 142, the sensor 110 receiving the induced current from the coil 142, the ADC 120, and the wireless communication module 130 A core housing 152 surrounding the main body housing 151 and the second core 143 may be included.

Referring to FIG. 4 , a predetermined space may be formed inside the main body housing 151, and insertion holes may be formed at both ends of the lower surface to allow both ends of the core housing 152 to be inserted. In addition, the core housing 152 may have a predetermined space in which the second core 143 is provided, and may be formed in a 'U' shape corresponding to the second core 143. In other words, as the upper part of the core housing 152 is inserted into the insertion hole of the main body housing 151, the main body housing 151 and the core housing 152 may be coupled to each other, but the coupling method is not limited thereto. don't

In addition, the wireless monitoring sensor device 10 adjusts the distance between the first core 141 and the second core 143 when the main body housing 151 and the core housing 152 are coupled. A part (not shown) may be further included. As the distance between the first core 141 and the second core 143 increases, the magnetic field decreases, so that the distance can be appropriately adjusted according to the location where the wireless monitoring sensor device 10 is installed.

Illustratively, the gap adjusting unit is formed inside both ends of the locking portion and the body housing 151 protruding from both ends of the core housing 152, respectively, and the locking portion is fixed and spaced apart from each other by a predetermined distance in the vertical direction. It may include a locking groove. In addition, interval marks may be formed on the core housing 152 so as to externally check the position where the locking part is fixed among the plurality of locking grooves. In other words, in the wireless monitoring sensor device 10, the distance between the first core 141 and the second core 143 may be adjusted by adjusting the locking groove in which the locking part is fixed among the plurality of locking grooves, but is not limited thereto.

Hereinafter, with reference to FIGS. 5 and 6, about a wireless monitoring sensor device 20 (hereinafter referred to as 'wireless monitoring sensor device 20') for monitoring the state of a railway power line according to another embodiment of the present invention. Explain.

Referring to FIG. 5, the wireless monitoring sensor device 20 includes a sensor 210 having an opening formed therein so that a railway power line passes through, an ADC 220 that digitizes a sensing value of the sensor 210, and a digitized sensing value. An energy harvester that supplies power to the wireless communication module 230, the sensor 210, the ADC 220, and the wireless communication module 230 that transmit through wireless data communication, and has an opening formed therein so that the railway power line passes through. (240).

The sensor 210 is formed in a concentric structure and may be positioned to enclose a railroad power line. In addition, the sensor 210 includes a temperature sensor for detecting temperature, an acceleration sensor for detecting acceleration of an object, a PD (Partial Discharge) sensor for detecting partial discharge generated from a railway power line, and an EM (Elasto- It may be a magnetic) sensor, preferably a PD sensor 210, but is not limited thereto, and may be a sensor 210 that detects the state of the railway power line or the external environment of the railway power line.

The energy harvester 240 generates power based on the magnetic field of the railway power line, and the sensor 210 may be coupled to the front of the energy harvester 240 to have a concentric circle structure. The aforementioned front portion may be a surface located in the 5 o'clock direction of FIG. 5 .

In addition, the energy harvester 240 and the sensor 210 may each incorporate a current transformer (CT) that generates power based on the magnetic field of the railway power line. The above-described current transformer is a device for converting or measuring current, and since it is a common technique to generate power using the current transformer, a detailed description thereof will be omitted.

Each of the energy harvester 240 and the sensor 210 may have a ring shape with an opening formed therein. In addition, the electric railway power lines may be inserted into openings formed in the energy harvester 240 and the sensor 210, respectively.

In addition, the energy harvester 240 is located on the upper part based on the center of the ring and is formed in a U-shape, and the upper energy harvester 241 is located on the lower part based on the center of the ring and is formed in a U-shape. An energy harvester 242 may be included.

In addition, the sensor 210 includes an upper sensor 211 located at the upper part based on the center of the ring and formed in a U shape, and a lower sensor 212 formed in a U shape located at the lower part based on the center of the ring. can include

On the other hand, the wireless monitoring sensor device 20 is hinged to the upper housing 251 by the upper housing 251 and the hinge structure 253 surrounding the upper energy harvester 241 and the upper sensor 211, and lower energy A lower housing 252 enclosing the harvester 242 , the lower sensor 212 , the ADC 220 , and the wireless communication module 230 may be included.

In addition, referring to FIG. 6, the upper housing 251 and the lower housing 252 have a hinge structure 253 located on one side and a fastening part 254 located on the other side, so that the energy harvester 240 and the sensor ( 210) can have an open state and a closed state, respectively.

In other words, after releasing the fastening state of the fastening part 254, rotating the upper housing 251, locating the railway power line, closing the upper housing 251, and fastening the fastening part 254, to the railway power line. The wireless monitoring sensor device 20 may be fixed. At this time, when in the closed state, the upper energy harvester 241 and the lower energy harvester 242 are in contact, and the upper sensor 211 and the lower sensor 212 are in contact and connected to each other.

Meanwhile, the wireless monitoring sensor device 20 may further include a storage unit 260 such as a battery or capacitor for storing power generated by the energy harvester 240 and a circuit unit for charging and managing power. In other words, the storage unit 260 receives and stores power from the energy harvester 240, and stores the stored power in the sensor 210 and the ADC 220. It can be supplied to the wireless communication module 230.

The above description of the present application is for illustrative purposes, and those skilled in the art will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present application.

10, 20: wireless monitoring sensor device
110: sensor 120: ADC
130: wireless communication module
140: Energy Harvester
141: first core 142: coil
143: second core
151: main body housing 152: core housing
210: sensor
211: upper sensor 212: lower sensor
220: ADC 230: wireless communication module
240: Energy Harvester
241: upper energy harvester 242: lower energy harvester
251: upper housing 252: lower housing
253: hinge structure 254: fastening part
260: storage unit

Claims (10)

In the wireless monitoring sensor device for monitoring the state of a railway power line,
one or more sensors;
an ADC that digitally processes the sensed values of the at least one sensor;
a wireless communication module for transmitting the digitized sensing value through wireless data communication;
and
An energy harvester supplying power to the sensor, ADC, and wireless communication module and having an opening formed therein so that the railway power line passes through,
The energy harvester produces power based on the magnetic field of the railway power line,
The energy harvester
a first core;
a coil wound around the first core; and
a second core having both ends opposed to both ends of the first core, spaced apart from both ends of the first core by a predetermined distance, and providing space for the railroad power line to pass therethrough;
a body unit housing enclosing the first core, the coil, the sensor receiving the induced current from the coil, the ADC, and the wireless communication module; and
a core housing surrounding the second core; and
When the main body housing and the core housing are coupled, a gap adjusting unit capable of adjusting the distance between the first core and the second core,
The spacing control unit
hooking parts protruding from both ends of the core housing; and
It is formed inside both ends of the main body housing, the locking part is fixed and includes a plurality of locking grooves spaced apart from each other by a predetermined distance in the vertical direction,
The wireless monitoring sensor device to adjust the distance between the first core and the second core as the catching portion adjusts the catching groove fixed among the plurality of catching grooves.
delete delete delete According to claim 1,
The sensor is a wireless monitoring sensor device for detecting partial discharge of the railway power line. delete delete delete delete delete

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