WO2020141677A1 - Dispositif de diagnostic de défaillance et roulement de roue de véhicule comprenant un dispositif de diagnostic de défaillance - Google Patents

Dispositif de diagnostic de défaillance et roulement de roue de véhicule comprenant un dispositif de diagnostic de défaillance Download PDF

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Publication number
WO2020141677A1
WO2020141677A1 PCT/KR2019/009497 KR2019009497W WO2020141677A1 WO 2020141677 A1 WO2020141677 A1 WO 2020141677A1 KR 2019009497 W KR2019009497 W KR 2019009497W WO 2020141677 A1 WO2020141677 A1 WO 2020141677A1
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WO
WIPO (PCT)
Prior art keywords
wheel bearing
unit
acceleration
diagnosis device
acceleration sensor
Prior art date
Application number
PCT/KR2019/009497
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English (en)
Korean (ko)
Inventor
임종근
김경현
Original Assignee
주식회사 일진글로벌
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Application filed by 주식회사 일진글로벌 filed Critical 주식회사 일진글로벌
Publication of WO2020141677A1 publication Critical patent/WO2020141677A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0047—Hubs characterised by functional integration of other elements
    • B60B27/0068—Hubs characterised by functional integration of other elements the element being a sensor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/001—Hubs with roller-bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G01M13/045—Acoustic or vibration analysis

Definitions

  • the present invention relates to a malfunction diagnosis device for diagnosing whether a malfunction or abnormal operation of a wheel bearing and a wheel bearing for a vehicle equipped with such a malfunction diagnosis device, and more specifically, reliability of malfunction or abnormal operation of the wheel bearing using an acceleration sensor It relates to a fault diagnosis device configured to be able to diagnose and a wheel bearing for a vehicle having the same.
  • This invention is the result of the research conducted by the Small and Medium Venture Business Department and the Korea Industrial Technology Agency's regional specialized industry development project (R&D, P0000519)]
  • a wheel bearing is a device that rotatably mounts and supports a vehicle's wheels on a vehicle body, and a wheel mounted on a rotating element is connected to a non-rotating element in which a wheel-mounted rotating element is fixed to the vehicle body through a rolling element. It is configured to be mounted and supported in a rotatable state on the vehicle body.
  • wheel bearings may be damaged due to damage such as flaking on the outer or inner ring that supports the rolling elements, because a large load and moment are applied in the radial and axial directions while the vehicle is running. , Such damage may cause noise, vibration, heat generation, etc. or, in severe cases, wheel bearings may be seized or a large accident may be separated from the drive shaft.
  • chassis parts such as wheel bearings were not equipped with a diagnostic function to monitor the operation status of the parts, the driver had to intuitively judge the abnormality of chassis parts such as wheel bearings by detecting noise or vibration by himself.
  • a technique for monitoring an operating state of a chassis component including a wheel bearing has been recently proposed by attaching a sensor to a wheel bearing or the like.
  • a technique for diagnosing a failure such as a wheel bearing by mounting a rotational speed sensor and an acceleration sensor on a wheel bearing or a vehicle body is disclosed.
  • Patent Document 1 collects an acceleration signal (vibration signal) and a speed signal of a driving vehicle using an acceleration sensor attached to a knuckle of a vehicle and a rotational speed sensor attached to a wheel bearing, and based on this, a failure of the wheel bearing Techniques for diagnosing are disclosed.
  • this conventional fault diagnosis technology requires both acceleration information (acceleration information) from the acceleration sensor and speed information from the rotational speed sensor to diagnose the failure. It is necessary to mount all of the acceleration sensors, and complicated wiring is required inside the vehicle in order to interlock signals from these sensors, and thus there is a problem in that hardware and software structures inside the vehicle body are complicated and manufacturing costs are increased.
  • Patent Literature 1 Korean Patent Publication No. 10-2011-0131411 (Publication date: 2011.12.7.)
  • the present invention is to solve the above-described conventional problems, and has an object to provide a fault diagnosis apparatus capable of reliable fault diagnosis while having a simpler structure and a wheel bearing for a vehicle having the same.
  • a representative configuration of the present invention for achieving the above object is as follows.
  • a failure diagnosis device mounted on the wheel bearing to diagnose whether the wheel bearing is malfunctioning or abnormal.
  • the apparatus for diagnosing a fault may include a detector for detecting an operating state of the wheel bearing, and a diagnostic unit for diagnosing a malfunction or abnormal operation of the wheel bearing using signal information detected by the detector.
  • the detection unit includes an acceleration sensor that collects acceleration information of the wheel bearing, and the diagnosis unit may be configured to diagnose whether the wheel bearing is abnormally operated by frequency analyzing the acceleration signal information collected from the acceleration sensor. have.
  • diagnosis of whether a wheel bearing is malfunctioning or abnormal may be configured to be performed based on acceleration signal information collected from an acceleration sensor and speed information calculated from the acceleration signal information.
  • the speed information used to diagnose whether the wheel bearing is malfunctioning or abnormal is processed by processing an acceleration signal information collected from an acceleration sensor, a root mean square (RMS), and then RMS peak It can be calculated by considering the frequency with the value as the rotational frequency of the wheel bearing.
  • RMS root mean square
  • the diagnosis unit may include a control unit for diagnosing a malfunction or abnormal operation of the wheel bearing based on a signal from the detection unit, and the control unit includes a filtering unit for filtering signals transmitted from the detection unit and a filtering unit It may include a signal analysis unit that receives the filtered signal from the unit and performs frequency analysis, and a failure diagnosis unit that diagnoses whether a wheel bearing malfunctions or malfunctions based on the analysis results.
  • the filtering unit may be configured to filter the signal transmitted from the acceleration sensor through a band pass filter.
  • the acceleration sensor may be configured to be mounted and used on the outer ring of the wheel bearing.
  • the detection unit may be further provided with a temperature sensor for measuring the temperature inside the wheel bearing.
  • the diagnosis unit may be configured to diagnose whether a wheel bearing malfunctions or malfunctions by using the acceleration signal information collected from the acceleration sensor and the temperature information collected from the temperature sensor together.
  • a wheel bearing for a vehicle that rotatably mounts and supports a vehicle wheel on a vehicle body may be provided.
  • a wheel bearing for a vehicle according to an embodiment of the present invention may be configured to include the above-described fault diagnosis apparatus.
  • the fault diagnosis apparatus according to the present invention and a wheel bearing for a vehicle provided with the same may further include other additional configurations without departing from the technical spirit of the present invention.
  • a fault diagnosis apparatus and a wheel bearing for a vehicle having the same may diagnose a malfunction or abnormal operation of the wheel bearing using only acceleration signal information (vibration signal information) from an acceleration sensor mounted on the outer ring of the wheel bearing. Because it is configured to enable the wheel bearing and complicated wiring work to interlock the rotational speed sensor and the acceleration sensor inside the vehicle is not required, the structure of the wheel bearing and the vehicle can be simplified and the manufacturing cost can be reduced. do.
  • the wheel bearing for a vehicle since the wheel bearing for a vehicle according to an embodiment of the present invention does not need to interlock the rotational speed sensor and the acceleration sensor to diagnose a failure, the acceleration sensor can be formed at any position regardless of the position of the rotational speed sensor. Thereby, the design freedom of the wheel bearing can be greatly increased.
  • FIG. 1 exemplarily shows a structure of a wheel bearing for a vehicle according to an embodiment of the present invention.
  • Figure 2 illustratively shows a cross-sectional structure of a wheel bearing for a vehicle according to an embodiment of the present invention.
  • FIG. 3 exemplarily shows a structure of a detection unit of a failure diagnosis device that can be applied to a wheel bearing for a vehicle according to an embodiment of the present invention.
  • FIG. 4 exemplarily shows a block diagram conceptually showing the configuration of a fault diagnosis apparatus that can be applied to a wheel bearing for a vehicle according to an embodiment of the present invention.
  • 5 exemplarily shows the frequency spectrum of the normal and defective bearings in the rotating frequency band.
  • FIG. 6 exemplarily shows an operation process of a failure diagnosis apparatus that can be applied to a vehicle wheel bearing according to an embodiment of the present invention.
  • the wheel bearing 10 for a vehicle according to an embodiment of the present invention may be formed similar to a conventional wheel bearing device.
  • the wheel bearing 10 for a vehicle according to an embodiment of the present invention includes a wheel hub 20 (rotating element), an inner ring 30, an outer ring 40 (non-rotating element), a rolling element 50, and the like. Can be.
  • the wheel hub 20 may be formed in a structure of a substantially cylindrical shape extending along the axial direction, and a hub flange may be provided near the wheel-side end of the wheel hub 20. .
  • the hub flange is formed in a shape extending radially outward along the circumferential direction of the wheel hub 20, and may be used to mount the wheel to the wheel hub 20 using a hub bolt or the like.
  • a step portion is formed at the vehicle body side end of the wheel hub 20 to be configured to mount the inner ring 30, and a part of the outer circumferential surface of the wheel hub 20 has a raceway surface (inside raceway surface) to form a rolling element ( 50) can be configured to support from the inside.
  • the one side raceway surface for supporting the rolling element is directly formed on a part of the outer circumferential surface of the wheel hub, but unlike this, two inner rings are mounted on the wheel hub to transmit through the two inner rings. It may be formed in another structure, such as being configured to form a raceway raceway surface (inner raceway surface).
  • the inner ring 30 may be configured to be press-fitted onto one side of the wheel hub 20.
  • the inner wheel 30 plastically deforms the end of the wheel hub 20 as shown in FIG. 2 or presses the end of the wheel hub 20 in a state in which it is pressed into the step formed at the vehicle body side end of the wheel hub 20. It may be configured to fasten a nut or the like on the vehicle body side end and be seated and maintained on the wheel hub 20.
  • the outer peripheral surface of the inner ring 30 is provided with a raceway surface (inner raceway surface) in contact with the rolling element 50 may be configured to support the rolling element from the inside.
  • the outer ring 40 may be configured to have a mounting flange for mounting the wheel bearing 10 on the outer circumferential surface to the vehicle body, and a raceway surface (outer raceway surface) to which the rolling element 50 contacts the inner circumferential surface.
  • the raceway surface (outer raceway surface) formed on the inner circumferential surface of the outer ring 40 cooperates with the raceway surface (inner raceway surface) formed on the wheel hub 20 and/or the inner ring 30, and is a rolling element that is a rolling element between the raceway surfaces ( 50) can be configured to receive and support.
  • the rolling element 50 is disposed between the wheel hub 20 and/or the raceway surface (inner raceway surface) formed on the inner ring 30 and the raceway surface (outer raceway surface) formed on the outer ring 40, where the wheels are mounted. It is possible to perform a function of rotatably supporting the wheel hub 20 with respect to the outer ring 40 fixed to the vehicle body.
  • the vehicle wheel bearing 10 may further include a failure diagnosis device 60 capable of diagnosing a malfunction or abnormal operation of the wheel bearing.
  • the malfunction diagnosis apparatus 60 of the wheel bearing 10 for a vehicle according to an embodiment of the present invention is based on the signal information detected by the detection unit 70 and the detection unit for detecting the operating state of the wheel bearing as shown in FIG. It may include a diagnostic unit 80 for diagnosing the operating state of the wheel bearing.
  • the detection unit 70 may be provided with an acceleration sensor 72 for detecting the vibration state of the wheel bearing.
  • the acceleration sensor 72 may be mounted on the outer ring 40 of the wheel bearing 10 or the like and configured to detect the vibration state of the wheel bearing 10.
  • the acceleration sensor 72 is a one-axis acceleration sensor capable of measuring acceleration in one of the x, y, and z-axis directions perpendicular to each other, a two-axis acceleration sensor capable of measuring acceleration in two directions, and three acceleration measurements. Any of the possible three-axis acceleration sensors can be configured.
  • the failure diagnosis device 60 may diagnose a failure of the wheel bearing using only vibration information in a direction perpendicular to the ground (for example, the z direction), but has two axes Alternatively, if the 3-axis acceleration sensor is used, it is possible to perform additional diagnosis, such as diagnosing an abnormality in the drive shaft (CVJ) or wheel alignment, as well as a malfunction of the wheel bearing, or diagnosing a brake adjuster or wheel balance abnormality. .
  • a detection device such as a temperature sensor 74 may be additionally provided in the detection unit 70 of the failure diagnosis device 60.
  • the temperature sensor 74 it is possible to diagnose a failure or abnormality of the wheel bearing through a change in the temperature inside the wheel bearing, so it is difficult to grasp through the detection information from the acceleration sensor or leakage of lubricant or grease (grease) It is possible to perform a fault diagnosis of a wheel bearing by the like, so that the diagnosis function of the fault diagnosis device can be further improved.
  • the diagnosis unit 80 of the failure diagnosis device 60 may receive a signal information obtained through the detection unit 70 and perform a function of diagnosing an operating state such as wheel bearing. .
  • the diagnostic unit 80 wheel bearings using the first input/output unit 82 receiving the detection signal from the detection unit 70 and the signal information (eg, acceleration signal information) transmitted from the first input/output unit 82.
  • control unit 84 provided in the diagnosis unit 80 is a filtering unit that filters the input signal, a signal analysis unit that receives the filtered signal from the filtering unit to perform analysis, and a wheel based on the analysis results of the signal analysis unit It may include a failure diagnosis unit for diagnosing whether the bearing is malfunctioning or abnormal.
  • the filtering unit performs a function of removing noise by filtering a signal (eg, an acceleration signal) detected by the detection unit 70, and is implemented by a band pass filter or the like that passes only signals of a specific frequency. Can be.
  • the signal analysis unit performs a function of analyzing a signal that has passed through the filtering unit, and the vehicle wheel bearing 10 according to an embodiment of the present invention performs frequency analysis (FFT analysis) of the acceleration signal from the acceleration sensor 72 It can be configured to perform signal analysis.
  • the failure diagnosis unit may perform a function of diagnosing and determining whether the wheel bearing is malfunctioning using the analysis result processed by the signal analysis unit.
  • diagnosis unit 80 As a result of diagnosing an operation state in the diagnosis unit 80, when it is diagnosed that there is a malfunction or abnormal operation in the wheel bearing, these diagnosis results are transmitted to an ECU (Electronic Control Unit) 90 of the vehicle or stored, such as a warning sound or display. It can be used to control the chassis parts of the vehicle by displaying the abnormality to the user through the display unit 92 or being transmitted to the driving unit 94.
  • ECU Electronic Control Unit
  • the vehicle wheel bearing 10 calculates the current speed of the vehicle based on the acceleration signal information detected by the acceleration sensor 72, and then calculates the detected acceleration signal information and It is configured to diagnose malfunction or abnormal operation of the wheel bearing using speed information.
  • the defect frequency varies depending on the speed of the vehicle
  • speed information as well as acceleration signal information (vibration information) from the acceleration sensor 72 is required to diagnose whether a malfunction or abnormal operation such as wheel bearing is performed.
  • the defect frequency of the inner ring, outer ring, and rolling element can be calculated through the following formula.
  • the failure diagnosis device and a wheel bearing for a vehicle having the same have speeds from acceleration signal information from an acceleration sensor without receiving speed information from a separate rotation speed sensor, unlike a conventional failure diagnosis device. After extracting the information, it may be configured to diagnose whether a malfunction or abnormal operation of a wheel bearing is used.
  • the failure diagnosis apparatus calculates a root mean square (RMS) of an acceleration signal detected through the acceleration sensor 72 and extracts a frequency having an RMS peak value therefrom. It can be configured to recognize the current speed by considering this as a rotation frequency.
  • RMS root mean square
  • the fault diagnosis apparatus measures the amplitude by time through an acceleration sensor, and then frequency-converts the measured hourly amplitude (FFT conversion) to extract in Hz, and RMS from the extracted data
  • the wheel bearing 10 for a vehicle is configured to calculate the vehicle speed based on the acceleration signal information from the acceleration sensor 72 to perform a malfunction diagnosis of the wheel bearing. It is possible to diagnose the operating state of a wheel bearing, etc., without receiving vehicle speed information separately from a sensor or the like.
  • the wheel bearing 10 for a vehicle can implement a failure diagnosis device only with an acceleration sensor, as shown in FIGS. 1 to 3, any of the outer surface of the outer ring fixed to the vehicle body, etc. It is possible to implement a failure diagnosis device by mounting an acceleration sensor at the position of the, it is easy to install the failure diagnosis device, and the degree of freedom in design of the failure diagnosis device and a wheel bearing for a vehicle having the same can be greatly improved.
  • a process of diagnosing a fault in the fault diagnosis apparatus 60 of the wheel bearing 10 for a vehicle may be implemented as follows.
  • a method of diagnosing a failure of the vehicle wheel bearing failure diagnosis apparatus 60 includes collecting acceleration signal information (vibration status information) from the acceleration sensor 72 of the failure diagnosis apparatus 60. And, the step of calculating the current speed of the vehicle from the collected acceleration signal information, and the frequency of the acceleration signal information collected from the acceleration sensor 72 (FFT analysis) to detect whether the abnormal operation of the wheel bearing failure diagnosis step It can contain.
  • acceleration signal information vibration status information
  • FFT analysis frequency of the acceleration signal information collected from the acceleration sensor 72
  • the frequency analysis in the failure diagnosis step may be performed based on the acceleration signal information from the acceleration sensor 72 and the speed information calculated therefrom.
  • a method for calculating speed information from the acceleration signal information collected by the acceleration sensor 72 uses the acceleration signal information detected by the acceleration sensor 72 as described above, in a practical area of the vehicle. After performing RMS processing (eg, 0 to 250 km/h), the frequency at which the RMS amplitude peaks may be regarded as a rotational frequency, and configured to recognize the current speed.
  • the operation process of the failure diagnosis apparatus may be configured in the following manner as shown in FIG. 6.
  • acceleration signal information may be collected through the acceleration sensor 72 provided in the detection unit 70 of the failure diagnosis device 60 (S100).
  • the collected acceleration signal information is collected, it is determined whether the vehicle satisfies the predetermined driving condition from the collected signal information (S200), and when the driving condition does not satisfy the predetermined requirement, the vehicle returns to the acceleration signal collecting step again. And, if a predetermined requirement is satisfied, it may be configured to proceed to a subsequent step.
  • the criteria for determining the driving conditions may be appropriately selected and set by a person skilled in the art according to the design requirements of the vehicle and the failure diagnosis device.
  • the collected acceleration signal information is filtered (S300), and the filtered signal is frequency-processed to extract the RMS peak value (S400).
  • the signal filtering may be implemented with a low pass filter or the like that passes only frequencies in the 0-40 Hz range (rotation frequency range in the 0-250 km/h speed section).
  • the deviation of the rotation frequency is compared to check whether the deviation is within a predetermined range (for example, within 10%) (S500), and if the deviation is within a predetermined range, the vehicle is based on the RMS peak value.
  • a predetermined range for example, within 10%
  • S500 the vehicle is based on the RMS peak value.
  • the calculation of the rotational speed may be performed by reversing the rotational speed of the vehicle by considering the frequency at which the RMS amplitude peaks as the rotational frequency, and the failure diagnosis is performed between the detected signal and the preset reference signal. It can be configured to diagnose failure or abnormal operation by comparing with each other.
  • the fault diagnosis may further include collecting temperature information from the temperature sensor 74 prior to the fault diagnosis step (S800), and the temperature sensor 74 in the fault diagnosis step It can be configured to perform a fault diagnosis considering the temperature information from.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

Selon un mode de réalisation, la présente invention concerne un dispositif de diagnostic de défaillance qui est monté sur un roulement de roue pour diagnostiquer si une défaillance ou un dysfonctionnement s'est produit dans le roulement de roue. Un dispositif de diagnostic de défaillance selon un mode de réalisation de la présente invention peut comprendre : une unité de détection pour détecter l'état de fonctionnement d'un roulement de roue; et une unité de diagnostic qui utilise des informations de signal détectées dans l'unité de détection pour diagnostiquer si une défaillance ou un dysfonctionnement s'est produit dans le roulement de roue. Selon un mode de réalisation de la présente invention, l'unité de détection peut comprendre un capteur d'accélération pour collecter des informations d'accélération concernant le roulement de roue, et l'unité de diagnostic peut être configurée pour effectuer une analyse de fréquence sur les informations de signal d'accélération collectées à partir du capteur d'accélération et diagnostiquer si un dysfonctionnement s'est produit dans le roulement de roue. Selon un mode de réalisation de la présente invention, le diagnostic de l'apparition d'une défaillance ou d'un dysfonctionnement dans le roulement de roue peut être conçu pour être réalisé sur la base des informations de signal d'accélération collectées à partir du capteur d'accélération et d'informations de vitesse calculées à partir des informations de signal d'accélération.
PCT/KR2019/009497 2018-12-31 2019-07-30 Dispositif de diagnostic de défaillance et roulement de roue de véhicule comprenant un dispositif de diagnostic de défaillance WO2020141677A1 (fr)

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KR1020180173921A KR102503857B1 (ko) 2018-12-31 2018-12-31 고장 진단 장치 및 이러한 고장 진단 장치를 구비하는 차량용 휠베어링
KR10-2018-0173921 2018-12-31

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CN112098090A (zh) * 2020-09-03 2020-12-18 中国铁道科学研究院集团有限公司金属及化学研究所 一种铁路货车轮对轴承智能检测系统
US20210264700A1 (en) * 2020-02-21 2021-08-26 Iljin Global Co.,Ltd Failure diagnosis device for wheel bearing

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CN113295420B (zh) * 2021-06-10 2022-04-08 燕山大学 基于周期指导组稀疏模型的滚动轴承故障诊断方法及系统
CN113418705B (zh) * 2021-07-23 2022-08-19 燕山大学 一种滚动轴承早期故障诊断方法
KR102635656B1 (ko) * 2021-12-23 2024-02-08 현대오토에버 주식회사 전기차 화재 감지 시스템 및 이를 이용한 전기차 제어방법

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KR20150026416A (ko) * 2013-09-03 2015-03-11 자동차부품연구원 자동차 허브 베어링 모니터링 시스템 및 모니터링 방법
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US20210264700A1 (en) * 2020-02-21 2021-08-26 Iljin Global Co.,Ltd Failure diagnosis device for wheel bearing
US11900737B2 (en) * 2020-02-21 2024-02-13 Iljin Global Co., Ltd Failure diagnosis device for wheel bearing
CN112098090A (zh) * 2020-09-03 2020-12-18 中国铁道科学研究院集团有限公司金属及化学研究所 一种铁路货车轮对轴承智能检测系统
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