KR102177419B1 - Cover assembly for railway vehicle with on-board generator and axle assembly including the same - Google Patents

Abstract

Disclosed is a cover assembly. The cover assembly can be installed on an axle assembly including an axle rotated by using power received from a power source, a housing surrounding one end portion of the axle, and a bearing arranged between one end portion of the axle and the housing to support the axle to be rotatable with respect to the housing. Moreover, a power generator capable of generating power by using rotation of the axle can be integrally formed on the axle assembly to supply the power for data detection, signal conversion, and wireless communication. Accordingly, the cover assembly can secure enough data for analyzing a frequency and diagnose an abnormality of the axle assembly in real time.

Description

A generator-integrated cover assembly for a railway vehicle and an axle assembly including the same TECHNICAL FIELD [COVER ASSEMBLY FOR RAILWAY VEHICLE WITH ON-BOARD GENERATOR AND AXLE ASSEMBLY INCLUDING THE SAME}

The present invention relates to a generator-integrated cover assembly for a railway vehicle and an axle assembly including the same, and more particularly, a frequency analysis is performed by supplying electricity generated by rotation of an axle to at least one sensor that detects a physical quantity of the axle assembly. It relates to a generator-integrated cover assembly for a railroad vehicle, and an axle assembly including the same, capable of securing sufficient data for.

Currently, parts used in railroad vehicles are periodically diagnosed, and if abnormalities are found during diagnosis, they are repaired or replaced. However, since the railway system is a mass transportation system, if an accident occurs in the railway system, there is a high possibility of a major accident. In order to prevent accidents occurring in railway vehicles, the axle assembly is a major monitoring target.

The possibility of a defect in the diagnosis target can be confirmed through heat, sound, and vibration. In the diagnosis method using heat or sound, the user can easily identify the defect of the object to be diagnosed, while the defect of the object to be diagnosed can be identified only after the defect of the object to be diagnosed has progressed significantly. Since the diagnosis method using vibration can predict the possibility of a defect of the diagnosis target quickly, the diagnosis method using vibration has been mainly used in the past.

However, in order to use the diagnosis method using vibration, the sampling time of the data must be set very short and the data must be collected, so power consumption for data sampling is very high.

In general, in the case of a railroad vehicle, a plurality of vehicles are connected to each other, and its operation is controlled by a single locomotive. Each of the plurality of vehicles is equipped with a plurality of axle assemblies. When power is supplied to a sensor for detecting physical quantities of a plurality of axle assemblies by wire and data is received by wire from the sensor, a wire harness is complicated and failure may occur frequently. Accordingly, recently, a method of exchanging data between a sensor and a server through wireless communication has been applied. According to the wireless communication method, a battery is disposed in an axle assembly and data detection, signal conversion, and wireless communication are performed using power from the battery. As mentioned above, in order to use the diagnosis method using vibration, since the power consumption for data sampling is very high, a battery having a large capacity must be used. However, the installation space of the axle assembly is limited, so that a battery having a sufficient capacity cannot be used. Accordingly, it was possible to monitor once an hour, and it was difficult to obtain sufficient data for fault diagnosis.

The matters described in this background are prepared to enhance an understanding of the background of the invention, and may include matters not known in the prior art to those of ordinary skill in the field to which this technology belongs.

An embodiment of the present invention provides a generator-integrated cover assembly for a railway vehicle capable of supplying power for data detection, signal conversion, and wireless communication by integrally forming a generator capable of generating electricity using the rotation of an axle in the axle assembly. I want to.

Another embodiment of the present invention is to provide an axle assembly including the cover assembly.

The cover assembly according to an embodiment of the present invention includes an axle that rotates by using power transmitted from a power source, a housing surrounding one end of the axle, and disposed between one end of the axle and the housing to accommodate the axle. It may be installed on an axle assembly including a bearing rotatably supporting against.

The cover assembly may include a bearing cover connected to the housing and having a space therein; A rotor fixedly mounted on one end of the axle and rotating together with the axle; A stator surrounding the rotor and maintaining a predetermined gap with the rotor; A printed circuit board (PCB) mounted on the stator and electrically connected to the stator and the rotor to apply an input to the stator and receive an output from the rotor; At least one sensor mounted on the PCB and detecting at least one physical quantity of the axle assembly; Further, a wireless antenna mounted on the bearing cover and capable of wirelessly transmitting data corresponding to at least one physical quantity detected by the at least one sensor may be included.

The rotor, the stator, the PCB, and the at least one sensor may be located in a bearing cover.

An encoder that rotates together with the rotor may be mounted on the rotor, and an encoder sensor that detects rotation of the encoder may be mounted on the stator.

The at least one sensor may include an acceleration sensor measuring acceleration of the axle assembly; And it may include a temperature sensor that measures the temperature of the axle assembly.

The cover assembly is mounted on the PCB, and a power control system for controlling an input applied to the stator and an output of the rotor; A battery mounted on the PCB and charged by receiving the output of the rotor through the power control system; Also, a wireless communication module mounted on the PCB and enabling data exchange through wireless communication may be further included.

The cover assembly may include a ground cover mounted on one side of the bearing cover; And it may further include a ground rotor connected to one end of the axle to rotate together with the axle, and extending into the ground cover through the bearing cover.

The rotor and the stator may be configured to generate 10W or more of power.

The at least one sensor may be configured to detect at least one physical quantity of the axle assembly at a sampling rate of 10 KHz or more.

An axle assembly according to another embodiment of the present invention includes an axle that rotates using power transmitted from a power source; A housing surrounding one end of the axle; A bearing disposed between one end of the axle and the housing to rotatably support the axle with respect to the housing; And a generator that generates electricity by using the rotation of the axle, at least one sensor that detects at least one of the acceleration of the axle, the rotational speed of the axle, and the temperature of the axle, and corresponding to the detected value of the at least one sensor It may include a cover assembly including a wireless antenna capable of transmitting data wirelessly, and a battery charged using electricity generated by the generator and supplying power so that the wireless antenna transmits data wirelessly.

The cover assembly is disposed on a bearing cover, and the bearing cover may be connected to the housing.

The generator is fixedly mounted on one end of the axle rotor to rotate with the axle; And it may include a stator surrounding the rotor and maintaining a predetermined gap with the rotor.

The axle assembly may include a printed circuit board (PCB) mounted on the stator and electrically connected to the stator and the rotor; A power control system mounted on the PCB and controlling an input applied to the stator and an output of the rotor; And mounted on the PCB, it may further include a wireless communication module for enabling data exchange through wireless communication.

The battery and the at least one sensor may be mounted on a PCB, and the generator and the PCB may be disposed in a bearing cover.

The axle assembly includes an encoder mounted on the rotor and rotating together with the rotor; And it is mounted on the stator, it may further include an encoder sensor for detecting the rotation of the encoder.

The axle assembly may include a ground cover mounted on one side of the bearing cover; And it may further include a ground rotor connected to one end of the axle to rotate together with the axle, and extending into the ground cover through the bearing cover.

The generator may be configured to generate 10W or more of power.

The at least one sensor may be configured to detect at least one of an acceleration of an axle, a rotational speed of an axle, and a temperature of an axle at a sampling rate of 10 KHz or more.

The axle assembly may include a gear box that changes a rotational speed of power of a power source through a plurality of gears and transmits the changed rotational speed to the axle; A gear box sensor module configured to detect at least one of acceleration, rotational speed, and temperature of the plurality of gears; In addition, a wired connector mounted on the bearing cover and connected to the PCB to supply power may be further included.

The measured value of the gearbox sensor module may be transmitted to the PCB wirelessly through the wireless antenna or wired through the wired connector.

According to an embodiment of the present invention, a generator capable of generating electricity using the rotation of an axle may be integrally formed in an axle assembly to supply power for data detection, signal conversion, and wireless communication. Accordingly, sufficient data for frequency analysis can be secured, and abnormalities of the axle assembly can be diagnosed in real time.

In addition, by adopting a wireless communication method, the wire harness can be simplified.

In addition, it is possible to reduce the capacity of the generator by sequentially transferring the detected data to the server through wireless communication between the axle assemblies.

In addition, effects obtained or predicted by the embodiments of the present invention will be disclosed directly or implicitly in the detailed description of the embodiments of the present invention. That is, various effects predicted according to an embodiment of the present invention will be disclosed within a detailed description to be described later.

Embodiments of the present specification may be better understood with reference to the following description in conjunction with the accompanying drawings in which like reference numerals refer to the same or functionally similar elements.
1 is a schematic diagram showing a railroad vehicle according to an embodiment of the present invention.
2 is a schematic cross-sectional view showing an axle assembly according to an embodiment of the present invention.
3 is a schematic diagram showing a partial configuration of an axle assembly according to an embodiment of the present invention.
4 is a schematic diagram showing a partial configuration of an axle assembly according to another embodiment of the present invention.
5 is a schematic cross-sectional view showing the configuration of a cover assembly according to an embodiment of the present invention.
6 is a schematic front view of a cover assembly according to an embodiment of the present invention.
The drawings referenced above are not necessarily drawn to scale, and should be understood as presenting a rather simplified representation of various preferred features illustrating the basic principles of the present disclosure. Certain design features of the present disclosure, including, for example, particular dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and environment of use.

The terms used herein are for the purpose of describing specific embodiments only, and are not intended to limit the present disclosure. As used herein, singular forms are intended to also include plural forms, unless the context clearly indicates otherwise. The terms “comprise” and/or “comprising”, as used herein, specify the presence of the recited features, integers, steps, actions, components and/or components, but other It will also be understood that the presence or addition of one or more of features, integers, steps, actions, components, components and/or groups thereof is not excluded. As used herein, the term “and/or” includes any one or all combinations of the items listed in association.

Terms such as “vehicle” or “vehicle” as used herein, or other similar terms, include railway vehicles as well as sports utility vehicles (SUVs), including passenger cars, buses, trucks, and various commercial vehicles. It is understood to include vehicles.

Additionally, it is understood that the methods below or one or more of aspects thereof may be executed by at least one or more control units (e.g., electronic control units (ECUs), etc.), controllers, or control servers. . The terms “control unit”, “controller”, or “control server” may refer to a hardware device including a memory and a processor. The memory is configured to store program instructions, and the processor is specifically programmed to execute program instructions to perform one or more processes described in more detail below. A control unit, controller, or control server, as described herein, may control the operation of units, modules, parts, devices, or the like. In addition, it is understood that the methods below may be implemented by an apparatus comprising a control unit or controller along with one or more other components, as recognized by one of ordinary skill in the art.

Also, the control unit, controller, or control server of the present disclosure may be implemented as a non-transitory computer-readable recording medium including executable program instructions executed by a processor. Examples of computer-readable recording media include ROM, RAM, compact disk (CD) ROM, magnetic tapes, floppy disks, flash drives, smart cards and optical data storage devices, It is not limited thereto. The computer-readable recording medium can also be distributed throughout the computer network so that program instructions can be stored and executed in a distributed manner such as, for example, a telematics server or a controller area network (CAN).

1 is a schematic diagram showing a railroad vehicle according to an embodiment of the present invention.

As shown in Fig. 1, the railroad vehicle 1 includes a plurality of vehicles connected to each other. The vehicle is designed to carry passengers or cargo, and a plurality of bogies 10 are installed under the vehicle to enable the vehicle to move on a track. An engine room may be formed in one of the plurality of vehicles, and a control server 200 may be disposed in the engine room.

The truck 10 is typically composed of two or three axle assemblies 100 and supports a vehicle body. The bogie 10 includes a bogie frame, an axle assembly 100 mounted on the bogie frame, a shock absorber, a braking apparatus, a traction motor, and the like. Since the balance 10 is well known to those skilled in the art, further detailed description will be omitted.

The control server 200 controls the operation of the railway vehicle 1 and monitors component parts included in the railway vehicle 1. For example, the control server 200 receives a signal corresponding to the physical quantity of the axle assembly 100 from at least one sensor included in the axle assembly 100, and based on the received signal, the axle assembly 100 ) May be configured to diagnose the condition. In addition, the control server 200 receives a signal corresponding to the physical quantity of the gear box 110 from at least one sensor installed in the gear box 110 (refer to FIG. 2), and based on the received signal, the gear box ( 110) and the condition of the rail may be diagnosed.

2 is a schematic cross-sectional view showing an axle assembly according to an embodiment of the present invention.

As shown in FIG. 2, the axle assembly 100 includes an axle 102. The axle 102 is connected to a power source (eg, a traction motor, etc.) and rotates by receiving power from the power source.

A gear box 110 may be disposed between the power source and the axle 102. The gear box 110 includes a plurality of gears, and the plurality of gears are engaged with each other to change the rotational speed of the power of the power source, and transmit the power of the changed rotational speed to the axle 102. The gear box 110 is equipped with a gear box sensor module 112, and the gear box sensor module 112 is configured to detect one of acceleration, rotational speed, and temperature of the plurality of gears. The control server 200 may diagnose the state of the gear box 110 based on the physical quantity of the gear box 110 detected by the gear box sensor module 112.

Wheels 104 are fixedly mounted on both sides of the axle 102. The wheel 104 may be fixed to the axle 102 by various methods such as press fitting, welding, and spline. Each of the wheels 104 may be rotatable on a track. When the axle 102 rotates by receiving power from a power source, the wheel 104 rotates on the track. Accordingly, the railroad vehicle 1 can move.

Bearings 120 are mounted at both ends of the axle 102. Each of the bearings 120 rotatably supports the axle 102 with respect to the vehicle body. The bearing 120 includes an inner ring, an outer ring, and a plurality of rolling elements. The inner ring is fixed to the axle 102 and rotates together with the axle. The outer ring surrounds the inner ring at an outer radius of the inner ring, and is fixed to the vehicle body. The plurality of rolling elements are disposed rotatably between the inner and outer rings. The plurality of rolling elements allow the inner ring to rotate relative to the outer ring.

Cover assemblies 130 are mounted at both ends of the axle 102. The cover assembly 130 primarily prevents foreign substances such as water or dust from entering the bearing 120.

3 is a schematic diagram showing a partial configuration of an axle assembly according to an embodiment of the present invention.

As shown in FIG. 3, the axle assembly 100 according to an embodiment of the present invention further includes a housing 140 surrounding the axle 102. The housing 140 may be formed separately from the vehicle body and connected to the vehicle body, or may be integrally formed with the vehicle body. As described above, a bearing 120 is disposed between the housing 140 and the axle 102. The inner ring of the bearing 120 is fixed to the axle 102, the outer ring of the bearing 120 is fixed to the vehicle body or housing 140, and a plurality of rolling elements are disposed between the inner and outer rings.

The axle assembly 100 includes a cover assembly 130 connected to the housing 140 or a vehicle body. The cover assembly 130 is connected to one end of the housing 140 to prevent foreign substances such as dust or moisture from flowing into the housing 140. The cover assembly 130 may be detachably mounted to the housing 140.

The cover assembly 130 is connected to the axle 102 through an extension part 132. Accordingly, the cover assembly 130 includes a rotatable portion connected to the axle 102 and a fixed portion connected to the housing 140. The cover assembly 130 further includes a bearing cover 150 as a fixed portion. The bearing cover 150 is connected to the housing 140, and a space in which parts can be arranged is formed.

The cover assembly 130 may further include an axle sensor module 160 disposed inside the bearing cover 150 and a wireless antenna 162 mounted on the bearing cover 150.

4 is a schematic diagram showing a partial configuration of an axle assembly according to another embodiment of the present invention.

As shown in FIG. 4, the axle assembly 130 ′ according to another embodiment of the present invention further includes a ground rotor 172 and a ground cover 170.

The ground rotor 172 is connected to one end of the extension part 132 and can rotate together with the extension part 132. One end of the ground rotor 172 passes through the bearing cover 150 and is located inside the ground cover 170. The ground rotor 172 is connected to the ground cover 170 through a brush installed therein.

The ground cover 170 is mounted on one surface of the bearing cover 150.

The railway vehicle 1 constitutes an electric circuit with a current collector (pantograph) as a (+) pole and a track as a (-) pole. Since the bearing 120 is disposed between the vehicle body electrically connected to the current collector and the wheel 104 electrically connected to the track, the current collector, the vehicle body, the track, the wheel 104, the axle 102, and the bearing 120 Forms a closed circuit. However, when high-pressure electricity flows through the bearing 120, the contact area between the inner ring, the outer ring, and the rolling element is small, and sparks or electrical corrosion occur at the contact point. In order to prevent this, electricity should be directly transmitted from the ground rotor 172 rotating together with the axle 102 to the ground cover 170 through a brush.

5 is a schematic cross-sectional view showing a configuration of a cover assembly according to an embodiment of the present invention, and FIG. 6 is a schematic front view of a cover assembly according to an embodiment of the present invention.

5 and 6, the cover assembly 130 according to the embodiment of the present invention includes an axle sensor module 160 and a generator 180 in the bearing cover 150.

The generator 180 includes a rotor 182 and a stator 184. The rotor 182 is fixed to the extension part 132 of the axle 102 and can rotate together with the axle 102. The stator 184 surrounds the rotor 184 while maintaining a predetermined gap with the rotor 182. Each coil is wound around the rotor 182 and the stator 184, and when a current is applied to the coil of the stator 184 to form a magnetic field, a current is induced in the coil of the rotor 184 rotating within the magnetic field. . In one embodiment, it has been described that the rotor 184 is fixed to the extension part 182, but the present invention is not limited thereto. The rotor 184 may be directly fixed to the axle 102 according to the size and power generation capacity of the bearing cover 150. It should be understood that the phrase'fixed to the axle 102' in the specification and claims includes both fixed directly to the axle 102 or fixed to the extension 132 connected to the axle 102.

In some embodiments, an encoder 183 is mounted on an outer peripheral surface of the rotor 182, and an encoder sensor 185 may be mounted on the stator 184. The encoder 183 is alternately arranged with the N and S poles in the circumferential direction, and the encoder sensor 185 faces the encoder 183 with a set air gap, which occurs when the encoder 183 rotates. Detects the change in magnetic field. Accordingly, the encoder sensor 185 may detect the rotational speed of the encoder 183, that is, the rotational speed of the axle 102.

At least one printed circuit board (PCB) is mounted on the outer periphery of the stator 184. The PCB 186 is electrically connected to the stator 184 and the rotor 182. Accordingly, the PCB 186 may apply an input (eg, current) to the stator 184 and receive an output (eg, current) from the rotor 182. Further, the PCB 186 may be electrically connected to the encoder sensor 185 to receive a signal corresponding to the rotational speed of the axle 102 detected by the encoder sensor 185.

An axle sensor module 160 including an acceleration sensor 192 and a temperature sensor 194 is mounted on the PCB 186. The acceleration sensor 192 may be a three-axis acceleration sensor capable of measuring acceleration of the axle 102 or the axle assembly 100 in the x-axis, y-axis, and z-axis directions. The temperature sensor 194 may measure the temperature of the axle 102 or the axle assembly 100.

The axle sensor module 160 further includes a power control system 197, a battery 198, and a wireless communication module 199 mounted on the PCB 186.

The power control system 197 may control an input applied to the stator 184 and an output of the rotor 182. That is, the power control system 197 may control the current applied to the stator 184 and may receive the current from the rotor 182 to charge the battery 198. In addition, the power control system 197 supplies the power of the battery 198 to the encoder sensor 185, the acceleration sensor 192, and the temperature sensor 194, so that the sensors 185, 192, and 194 are connected to the axle assembly. Make it possible to detect a physical quantity of (100). In addition, the power control system 197 supplies power from the battery 198 to the wireless communication module 199 to enable wireless communication with the control server 200 or the surrounding axle assembly 100.

The battery 198 may charge electricity generated by the generator 180 under the control of the power control system 197 and supply electricity to each component of the axle sensor module 160. The battery 198 may be a secondary battery capable of charging and discharging.

The wireless communication module 199 converts the physical quantity detected by the encoder sensor 185, the acceleration sensor 192, and the temperature sensor 194 into a signal capable of wireless communication, and converts the converted signal, for example, Bluetooth, Wireless communication is performed with the control server 200 or the axle assembly 100 in the vicinity through a wireless communication protocol such as ZigBee, Wi-Fi, and LTI. The signal converted by the wireless communication module 199 is transmitted to the control server 200 or the surrounding axle assembly 100 through the wireless antenna 162. In addition, a signal may be received from the axle assembly 100, the control server 200, or the gear box sensor module 112 in the vicinity through the wireless antenna 162.

A wired connector 163 may be further installed on the bearing cover 150. The wired connector 163 is electrically connected to the components on the PCB 186 to apply external power and transmit/receive data, or wired to the gear box sensor module 112 included in the axle assembly 100 As a result, power may be applied to the gear box sensor module 112 or a signal may be transmitted/received to the gear box sensor module 112.

According to an embodiment of the present invention, when considering the dimensions of the bearing cover 150 and the average rotation speed of the axle 102, the generator 180 mountable in the bearing cover 150 can generate power of about 10W or more. When a power supply of 10W is used, the acceleration (or vibration) in the 3-axis direction (75,000 data) of the axle assembly 100 at a sampling rate of 25 KHz or higher, the temperature of the axle assembly 100 (1 data), and the axle 102 ) To measure the rotational speed (1 piece of data), and transmit 75,002 pieces of data by wireless communication. In order to perform frequency analysis using the vibration of the axle assembly 100, data should be sampled at a sampling rate of at least 10 KHz or more, preferably 12.5 KHz. According to an embodiment of the present invention, a generator that can be mounted in the bearing cover 150 ( 180) can be used for data samples and wireless communication at a sampling rate of 25KHz or higher, so sufficient data for frequency analysis can be obtained.

In addition, according to an embodiment of the present invention, the generator 180 and the axle sensor module 160 including the sensors 185, 192, 194 are all disposed in the bearing cover 150, and the generator 180 An extension 132 connected to the rotor 182 protrudes outside the bearing cover 150. Therefore, when the bearing cover 150 is connected to the housing 140 and the extension part 132 is connected to the axle 102, the cover assembly 130 according to the embodiment of the present invention can be installed on the axle 102. Accordingly, it is possible to apply the cover assembly 130 according to the embodiment of the present invention without applying any special changes to the axle assembly of the existing railway vehicle.

Meanwhile, data detected by one axle assembly 100 may be transmitted to another axle assembly 100 close to the control server 200 through wireless communication. In this way, the axle assembly 100 closest to the control server 200 may transmit all data for each axle assembly 100 to the control server 200 through wireless communication. Accordingly, power consumption for wireless communication can be reduced, and the capacity of the generator 180 can be reduced.

In addition, since data is transmitted through a wireless communication method, the wire harness can be simplified.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and the embodiments of the present invention are easily changed by those of ordinary skill in the art to which the present invention pertains. It includes all changes to the extent deemed acceptable.

Claims (19)

An axle that rotates using power received from a power source, a housing surrounding one end of the axle, and a bearing disposed between one end of the axle and the housing to rotatably support the axle with respect to the housing In the cover assembly installed in the assembly,
A bearing cover connected to the housing to form a sealed space therein;
A rotor fixedly mounted on an outer peripheral surface of one end of the axle to surround one end of the axle and rotate with the axle;
A stator that maintains a certain gap with the rotor in a radial direction and surrounds the rotor to face the rotor in a radial direction;
A printed circuit board (PCB) mounted on the stator and electrically connected to the stator and the rotor to apply an input to the stator and receive an output from the rotor;
At least one sensor mounted on the PCB and detecting at least one physical quantity of the axle assembly including acceleration of the axle assembly; And
A wireless antenna mounted on the bearing cover and capable of wirelessly transmitting data corresponding to at least one physical quantity including acceleration detected by the at least one sensor;
Including,
The rotor, the stator, the PCB, and the at least one sensor are positioned in a closed space formed by a bearing cover. delete The method of claim 1,
The rotor is equipped with an encoder that rotates together with the rotor,
A cover assembly in which an encoder sensor that detects rotation of the encoder is mounted on the stator. The method of claim 1,
The at least one sensor
An acceleration sensor measuring acceleration of the axle assembly; And
A temperature sensor measuring the temperature of the axle assembly;
Cover assembly comprising a. The method of claim 1,
A power control system mounted on the PCB and controlling an input applied to the stator and an output of the rotor;
A battery mounted on the PCB and charged by receiving the output of the rotor through the power control system; And
A wireless communication module mounted on the PCB and enabling data exchange through wireless communication;
Cover assembly further comprising a. The method of claim 1,
The bearing cover
A ground cover mounted on one side of the bearing cover to cover one side of the bearing cover to form the sealed space; And
A ground rotor connected to one end of the axle, rotating together with the axle, and extending into the ground cover through the bearing cover;
Cover assembly comprising a. The method of claim 1,
The rotor and the stator cover assembly configured to generate 10W or more of power. The method of claim 1,
The at least one sensor is configured to detect at least one physical quantity of the axle assembly at a sampling rate of 10 KHz or more. An axle that rotates using the power transmitted from the power source;
A housing surrounding one end of the axle;
A bearing disposed between one end of the axle and the housing to rotatably support the axle with respect to the housing; And
A generator that generates electricity by using the rotation of the axle, at least one sensor that detects at least one physical quantity of the axle assembly including acceleration of the axle, and power charged and charged using electricity generated by the generator A cover assembly including a battery supplying a battery;
A bearing cover connected to the housing to form a sealed space therein; And
A wireless antenna mounted on the bearing cover and capable of wirelessly transmitting data corresponding to the detected value of the at least one sensor;
Including,
The cover assembly is disposed in a closed space formed by a bearing cover,
The generator is
A rotor fixedly mounted on an outer peripheral surface of one end of the axle to surround one end of the axle and rotate together with the axle; And
A stator that maintains a certain gap with the rotor in a radial direction and surrounds the rotor to face the rotor in a radial direction;
Including,
The cover assembly
A printed circuit board (PCB) mounted on the stator and electrically connected to the stator and the rotor;
A power control system mounted on the PCB and controlling an input applied to the stator and an output of the rotor; And
A wireless communication module mounted on the PCB and enabling data exchange through wireless communication;
It further includes,
The at least one sensor is an axle assembly mounted on the PCB. delete delete delete The method of claim 9,
The battery and the at least one sensor are mounted on a PCB. The method of claim 9,
An encoder mounted on the rotor and rotating together with the rotor; And
An encoder sensor mounted on the stator and detecting rotation of the encoder;
An axle assembly further comprising a. The method of claim 9,
The bearing cover
A ground cover mounted on one side of the bearing cover to cover one side of the bearing cover to form the sealed space; And
A ground rotor connected to one end of the axle, rotating together with the axle, and extending into the ground cover through the bearing cover;
Axle assembly comprising a. The method of claim 9,
The generator is an axle assembly configured to generate more than 10W of power. The method of claim 9,
The at least one sensor is configured to detect at least one of an acceleration of an axle, a rotational speed of an axle, and a temperature of an axle at a sampling rate of 10 KHz or more. The method of claim 9,
A gear box that changes a rotational speed of a power source through a plurality of gears and transmits the changed rotational speed to the axle;
A gear box sensor module configured to detect at least one of acceleration, rotational speed, and temperature of the plurality of gears; And
A wired connector mounted on the bearing cover and connected to the PCB to supply power;
An axle assembly further comprising a. The method of claim 18,
The measured value of the gear box sensor module is transmitted to the PCB through the wireless antenna or wired through the wired connector.

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