JP6621683B2 - Component status detector - Google Patents

Description

  The present invention detects a state such as a rotational speed and a vibration value of a rotating part or a rotating part of a rotating part, represented by a vehicle bearing and peripheral parts, and prevents an accident caused by a failure. The present invention relates to a component state detection device that can be used for, for example.

2. Description of the Related Art Conventionally, in industrial fields such as railway vehicles and windmills, systems have been proposed in which vibration sensors, rotation sensors, temperature sensors, and the like are installed in bearings and their peripheral parts and their operating conditions are monitored. (Patent Document 1)
In addition, a system has been proposed in which data detected by a sensor is transmitted using a mobile information terminal such as a smartphone, data processing or storage is performed by a server or the like, and state diagnosis is performed by comparing with past data. . (Patent Document 2)
There has also been proposed a diagnostic system capable of diagnosing the state of the bearing without depending on the rotational speed and load load. (Patent Document 3)

JP 2012-42338 A JP2013-228352A Japanese Patent No. 41200099

Currently, for bearing inspections, subjective judgments that rely on the five senses of the mechanic, such as appearance, gritty, and abnormal noise, are common, and because there are variations in diagnostic criteria, failure due to poor maintenance cannot be eradicated. . In response to this problem, there is a need for a maintenance tool capable of quantitative determination in order to improve the accuracy of state determination, and the above-described conventional techniques have been proposed. However, the conventional techniques have the following problems.
In order to diagnose the state, the rotation speed information of the bearing is used in addition to the vibration detection, but the detection method and setting method of the rotation speed are not clearly shown. Alternatively, a separate speed sensor is required in addition to the vibration sensor. (Patent Documents 1 and 2)
In Patent Document 3, by calculating the crest factor, it is possible to detect a bearing abnormality without depending on the rotational speed or load. However, when an abnormality occurs in a peripheral part to which the bearing is attached, disturbance vibration is large. In the case of superimposition, abnormality diagnosis cannot always be performed by the above method. Therefore, for reliable abnormality diagnosis, diagnosis using the rotation speed in addition to the vibration detection value is preferable.

  An object of the present invention is to provide a component state detection device capable of detecting vibration and detecting rotation speed without using a sensor dedicated to rotation detection.

The processing system of the component state detection device the present invention, the sensor unit 3 in which a part or whole is attached taken removably to allow the rotation portion 1a integrally rotating the rotation portion 1a of the part 1 to rotate, performs information processing and a 4,
The rotating part 1a includes a rotating side wheel 101b of a rolling bearing 101, and the sensor unit 3 is provided at a position offset in the axial direction from a circumferential surface on which the raceway surface is formed in the rotating side wheel 101b.
Before Symbol sensor unit 3, at a position offset from the rotation axis center O, and an acceleration sensor 302a having sensitivity in the radial direction of rotation, a communication device 307 for transmitting the measurement data of the acceleration sensor 302a to the processing system 4 Have
The processing system 4 includes a rotation speed calculation unit 603a that calculates the rotation speed of the rotation unit 1a of the component 1 from a DC component of measurement data of the acceleration sensor 302a, and the AC of the measurement data. A vibration calculating unit 603b that calculates a vibration value of the rotating unit 1a.
The part 1 is a part whose whole or part is the rotating part 1a. As such a part 1, in addition to the rolling bearing, there are a shaft, a ball screw, a constant velocity joint, and the like.

According to this configuration, since the acceleration sensor 302a having sensitivity in the radial direction is provided at a position offset from the rotation axis center O, the rotational speed of the rotating part 1a of the component 1 to be measured is determined in consideration of the action of centrifugal force. It becomes detectable. That is, the acceleration (DC component) α and the rotation speed V have the following relationship.
Acceleration α = V ² / R
V: rotational speed,
R: Offset amount (distance from rotation axis center O to detection center by acceleration sensor 302a)
For this reason, if the acceleration is detected, the rotation speed can be calculated by the calculation using the above formula. The rotational speed calculation unit 603a calculates the rotational speed from the DC component of the measurement data of the acceleration sensor 302a by the above formula.
Since the vibration is the vibration of the rotating unit 1a, the vibration is generally periodically generated in synchronization with the rotation, and the vibration value appears as a periodic change of the measurement data of the acceleration sensor 302a, that is, an AC component. The vibration calculation unit 603b obtains an alternating current component of the measurement data, and calculates an arbitrary form of vibration value to be used for abnormality determination or the like from the alternating current component.

As described above, the rotational speed can be obtained only by providing the acceleration sensor 302a as sensors without mounting a separate rotation sensor.
In order to accurately determine the abnormality of the component 1 based on the vibration value, it is necessary to know the rotation speed. As described above, the vibration value and the rotation speed can be obtained only by providing the acceleration sensor 302a as a sensor. There is no need to mount a separate rotation sensor, which simplifies the configuration and reduces the number of parts.

Before Symbol sensor unit 3 Ru detachably attached to the rotating portion 1a of the component 1.
In the configuration in which the sensor unit 3 is pressed against the component 1 by hand, the rotation unit 1a cannot be detected, and if the sensor unit 3 cannot be removed from the component 1 yet, it becomes an obstacle during normal operation of the component 1, and the state detection The parts 1 that can be produced are limited. However, if the sensor unit 3 is detachable, these problems are solved.
The sensor unit 3 may be detachably held by a fitting type, or may be a magnet or the like whose magnetic force is switched on and off.

In the case of detachable, the stay 2 fixed integrally with the rotating portion 1a of the component 1 may be provided, and the sensor unit 3 may be detachably attached to the stay 2.
If the part 1 has the stay 2 that detachably holds the sensor unit 3, the part 1 is always the same even when the sensor unit 3 is repeatedly attached to and detached from the part 1, unlike the case where the probe of the sensor unit 3 is pressed against the part 1 by hand. It can be mounted at a position, and the reproducibility of detection and measurement results is good, and the accuracy of detection and measurement is improved. Further, by having the stay 2, it becomes easy to attach the sensor unit 3 to the rotating part 1 a of the component 1, and the installation time is shortened.

When the stay 2 is provided, the stay 2 includes the unique information storage unit 201 that indicates the unique information of the component 1, and the sensor unit 3 includes the reading unit 308 that reads the unique information. good.
If the unique information storage means 201 is provided so as to be readable, the component 1 to be measured can be automatically identified, and the unique information can be associated with information for determining the type and state of the component 1. In this case, no input operation is required, and input errors can be eradicated.
By providing the unique information storage means 201 in the stay 2, it is possible to perform state detection and reading of unique information at positions close to each other compared to the case where the stay 2 and the unique information storage means 201 are provided separately. There is also an advantage that the sensor unit 3 can collectively perform the process.
Note that the unique information may be an identification number of the part 1, and may be information to which a specification of the part 1, a manufacturing history, and the like are added.

In the present invention, the processing system 4 includes a data storage unit 602 (for example, a specification database) in which data for state determination including specifications of the component 1 is stored, the measurement data and the data of the acceleration sensor 302a. A state determination unit 604 that determines a state related to an abnormality or life of the component 1 using the state determination data stored in the storage unit 602 may be used.
In order to accurately determine the state of the part 1 such as an abnormality or life, information for determination such as a threshold value according to the type of the part 1, for example, a threshold value according to the part specifications such as the bearing specifications is used. is necessary. If the determination data corresponding to the component type is stored in the determination information storage unit 602, it is possible to easily determine the state with high accuracy.
Note that the state determination information stored in the determination information storage unit 602 may be a threshold value, component specifications, or both. Even if only the component specifications are stored and the threshold value is not stored, if a function for calculating the threshold value from the component specification is provided, a highly accurate determination can be made.

Component state detection device of the present invention, this rotation unit rotating part of the component part or whole rotates integrally rotates capable detachably preparative attached is the sensor unit, and a processing system, wherein the rotating part includes a rotating race member of the rolling bearing, at a position axially offset from the peripheral surface of the raceway surface in the rotation-side wheel is formed, the sensor unit is provided, before Symbol sensor unit is offset from the rotational axis center An acceleration sensor having sensitivity in the radial direction of rotation and a communication device that transmits measurement data of the acceleration sensor to the processing system 5, the processing system including a direct current of the measurement data of the acceleration sensor A rotation speed calculation unit that calculates a rotation speed of the rotation part of the part from a component, and a vibration value of the rotation part of the part from an AC component of the measurement data Because having a that vibration calculation unit, without using a sensor of the rotation detection only, the effect of say can be performed and the detection of the vibration detecting a rotational speed is obtained.

It is sectional drawing which shows the example of the components and sensor unit in the components state detection apparatus concerning 1st Embodiment of this invention. It is a block diagram which shows the conceptual structure of the component state detection apparatus. It is sectional drawing which shows the example of the components in the component state detection apparatus which concerns on other embodiment of this invention, a stay, and a sensor unit. It is a block diagram which shows the conceptual structure of the component state detection apparatus. It is a front view which shows the auxiliary machine installation part of the commercial vehicle which is an apparatus equipped with multiple components used as a measuring object. It is a front view which shows the ball screw apparatus which is an example of the components of the other main body which is a measuring object.

  A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows the basic configuration of the sensor unit, and FIG. 2 shows the basic configuration of the processing system. This component state detection apparatus includes a sensor unit 3 and a processing system 4 (FIG. 2). In this embodiment, the processing system 4 includes an information terminal 5 and a data server 6. In FIG. 1, the sensor unit 3 is attached to the rotating part 1 a of the component 1 to be measured, and rotates integrally with the rotating part 1 a of the component 1. The part 1 may be a whole rotating part. In this case, the whole part 1 becomes the rotating part 1a.

  The component 1 is a mechanical component and is a rolling bearing device in the illustrated example. Specifically, it comprises a device that rotatably supports a pulley 102 on which a belt 104 in an auxiliary machine of an automobile is mounted on a fixed shaft 103 via a rolling bearing 101. More specifically, the pulley 102 is constituted by a pulley of each belt device 72 of an auxiliary machine provided in the commercial vehicle 71 (FIG. 5).

  In FIG. 1, a rolling bearing 101 is an outer ring rotating, and a pulley 102 is fitted to an outer peripheral surface of an outer ring 101b which is a rotating side wheel. The rolling bearing 101 is a sealed ball bearing in this example, and has a rolling element 101c formed of a ball between the inner ring 101a and the outer ring 101b, and seals 101d positioned at both ends between both race rings 101a and 101b. are doing. A component part 105 such as an end face cover that covers the end face of the rolling bearing 101 is attached to the pulley 102. The outer ring 101b, the pulley 102, and the component 105 constitute a rotating part 1a. The sensor unit 3 is attached to the outer surface of the component 105 of the rotating part 1a so that the unit center coincides with the rotation axis center O.

In the sensor unit 3, an acceleration sensor 302 a that performs vibration measurement is mounted on the case 306 as a state detection sensor 302 that detects a state quantity of the component 1, and the acceleration sensor 302 a is offset from the rotation axis center O. In addition, it is installed so as to detect radial acceleration. The state detection sensor 302 may include a temperature sensor (not shown) in addition to the acceleration sensor 302a.
The state detection sensor 302 such as the acceleration sensor 302a is an analog output sensor in this embodiment, and the measurement data is digitally converted by an A / D converter (not shown) mounted on the sensor unit 3 and wirelessly transmitted. To output. The sensor unit 3 may output the measurement data in a wired manner as analog data, and A / D convert it with the information terminal 5 (FIG. 2). A sensor that outputs a digital signal may be used as the state detection sensor 302.

  In FIG. 1, the information storage device 303 is mounted on the sensor unit 3, and measurement data of the state detection sensor 302, unique information of the component 1, and the like are stored in the information storage device 303.

  In addition to this, a communication device 307 with the information terminal 5 (FIG. 2) is mounted on the sensor unit 3 to enable communication with the communication device 501 of the information terminal 5. The communication devices 307 and 501 are configured to communicate wirelessly. In the case of the wireless type, since measurement can be performed from a remote position, measurement can be performed even in a place where space is limited, but in addition, in order to move away from a drive unit (not shown) that drives the component 1 The safety of the measurer is also improved.

The communication devices 307 and 501 that perform communication between the sensor unit 3 and the information terminal 5 may be wired via slip rings or the like. In the case of the wired type, since the power can be supplied together with the signal line from the information terminal 5 without mounting a battery or the like on the sensor unit 3, the sensor unit 3 can be made compact.
In addition to this, the communication device 307 that performs communication with the information terminal 5 of the sensor unit 3 is an interface of a removable data medium (not shown) such as an SD card, and performs communication by offline processing using the data medium. May be. In that case, the information storage device 303 of the sensor unit 3 may be a detachable data medium such as an SD card, which makes it possible to securely store data even in a place where the wireless communication environment is poor.

  The sensor unit 3 includes measurement instruction response means (not shown) that starts measurement by the state detection sensor 302 in response to a measurement instruction from the processing system 4. The measurement instruction response means may be included in the communication device 307.

In FIG. 2, the information terminal 5 is a personal computer, for example. The information terminal 5 may be a mobile terminal such as a smartphone or a tablet. The information terminal 5, in addition to the prior SL communications device 501 for communicating with the sensor unit 3, the input unit 502, a communication network communication device 508, operating system 503, the terminal side processing unit 504, an information storage unit 505, and A display device 509 such as a liquid crystal display device for displaying a screen is provided.

The information terminal 5 is a device serving as a measurement instruction unit that instructs the sensor unit 3 to perform measurement and receives the measured data. The measurement condition set by the input unit 502 via the communication device 501 Is transmitted to the sensor unit 3 as a measurement command, and further data received by the sensor unit 3 is received.
The sensor unit 3 is a communication device 307 with the information terminal 5 and receives measurement conditions set by the information terminal 5 and measures data. The measured data is stored in the information storage device 303 and further transmitted to the information terminal 5 by the communication device 307 with the information terminal 5. Measurement data transmitted from the sensor unit 3 and received by the communication device 501 of the information terminal 5 is stored in the information storage unit 505. The stored data is transmitted from the communication network communication device 508 to the data server 6 via the communication network 7. The communication network 7 may be a LAN or a wide area communication network using the Internet or the like.

  The data server 6 includes a reception information storage unit 601, a specification database 602, an arithmetic processing unit 603, an information determination unit 604, a processing data storage unit 605, and a communication network communication device 606. The reception information storage unit 601 is means for storing measurement data received from the information terminal 5. The specification database 602 is a data storage unit in which data for state determination referred to in the claims is stored, and specifications such as specifications of various components 1 and sensor units 3 to be measured by the component state detection device. It is a stored database. In addition to the above specifications, the specification database 602 includes a conversion formula for calculating a rotation speed from a direct current component of acceleration measurement data using the above specifications, a measurement object based on these specifications, vibration values measured in the past, and the like. A state discriminant for estimating the state of the component 1 is stored.

The arithmetic processing unit 603 is a means for calculating the rotational speed and vibration value of the rotating unit 1a of the component 1 from the measurement data obtained from the information terminal 5 and stored in the received information storage unit 601, so to speak, a data analyzing unit. It is. Arithmetic processing unit 603, data required for data analysis from the specification database 6 02, i.e. specification data of the component 1 and the sensor unit 3, and reads the conversion equation, the rotational speed and vibration as the processing of the measurement data Calculate the value.

More specifically, the arithmetic processing unit 603 includes a rotation speed calculation unit 603a and a vibration calculation unit 603b. The rotational speed calculation unit 603a extracts only the direct current component of the transmitted acceleration measurement data with a low-pass filter (not shown) or the like, and the specification of the component 1 obtained from the specification database 602, for example, the rotational axis center of the acceleration sensor 302a. The rotational speed is calculated using the offset amount R (the distance from the rotation axis center O to the detection position center by the acceleration sensor 6a) from O (FIG. 1).
Specifically, because of the action of centrifugal force, the acceleration α and the rotational speed V have the following relationship.
Acceleration α = V ² / R
The rotational speed calculation unit 603a converts the acceleration α into the rotational speed V according to the above formula.

  Similarly to the above, in the vibration detection unit 603b, only an AC component is extracted by a high-pass filter (not shown) or the like, and the component 1 is obtained from the specification of the component 1 obtained from the specification database 602 and the converted value of the rotation speed V. Determine the state of. The extraction of the AC component is to extract the component through a high-pass filter. However, since the primary rotation component becomes large due to the eccentricity of the acceleration sensor 302a, the state is determined using the effective value or the peak value. For this, it is desirable to set the cut-off frequency higher than the rotational frequency to be measured.

  Based on the result calculated by the arithmetic processing unit 603, the state determination unit 604 determines the state of the component 1 to be measured, for example, whether it is normal or not, and the remaining life stage. For this determination, for example, a state discriminant stored in the specification database 602 is used.

  The data processed by the arithmetic processing unit 603 as described above and the data determined by the state determination unit 604 using this data are stored in the processing data storage unit 605. Data in the processing data storage unit 605 is transmitted to the information terminal 5 and the display terminal 8 through the communication network 7 by the communication network communication device 606. The display terminal 8 is a terminal used exclusively for display. By displaying the results on the display device 509 of the information terminal 5, the results can be transmitted to the worker in real time. In addition, by sending the result to the display terminal 8 installed in another location (for example, a data center of an operation management company), it is possible to quickly arrange another vehicle when an abnormality occurs. It becomes.

It should be noted that when the communication environment is bad or when the data server 6 is in a bad condition, the terminal side processing means 504 of the information terminal 5 may simply calculate and determine the state.
Further, the state determination unit 604 and the arithmetic processing unit 603 provided in the data server 6 are mounted on the information terminal 5, and the data server 6 includes only the specification database 602 and the processing data storage unit 605, and stores these stored contents. You may make it transmit to the information terminal 5 by the request | requirement from the information terminal 5. FIG. Further, the processing system 4 may be configured by a single information processing apparatus without providing the data server 6.

  The terminal-side processing means 504 is configured by dedicated software and has a function of controlling each means and device of the information terminal 5 to control information communication with the sensor unit 3 and the data server 6, data display, and the like. The dedicated software is downloaded and installed from the data server 6, or obtained from a portable storage medium such as a CD or DVD, a homepage other than the data server 6 on the Internet constituting the communication network 7, an application site, etc. Installed. The dedicated software is an application program that causes a general personal computer or portable terminal to function as the information terminal 5 having the means and devices by the installation. The OS (operation program) 503 of the information terminal 5 has a function that enables such download and installation. Further, the terminal side processing unit 504 displays related data on the screen of the display device 509. For example, the data server 6 is accessed, and the unique information, the past measurement data, the state determination result, and the like of the component 1 to be measured are obtained and displayed on the screen of the display device 509.

In this way, the component state detection device can obtain an effect that vibration detection and rotation speed detection can be performed without using a rotation detection dedicated sensor.

  3 and 4 show another embodiment. In this embodiment, the stay 2 is integrally attached to the component 1 to be measured, and the stay 2 and the sensor unit 3 are detachable. A unique information storage unit 201 is mounted on the stay 2. The unique information storage unit 201 is a unit that stores unique information about the component 1 to be measured, and stores information on the component 1 itself, vehicle information that is information about a vehicle using the component 1, and the like. .

The stay 2 has an outer shape composed of a short cylindrical seat portion 2b whose back side surface is joined to the component 105 of the component 1 and an axial holding portion 2a protruding from the center of the front side surface of the seat portion 2b. I am doing. The cross-sectional shape of the stay 2 may be any of a hollow shaft type, a semi-hollow shaft type, and a hollow non-type. The material of the stay 2 may be a synthetic resin or a metal. The stay 2 and the component 105 may be joined in any joining form such as a screw, an adhesive, magnetism, welding, a labyrinth shape, or a ring.
In the illustrated example, the holding portion 2a is configured such that the bottom surface 306a of the case 306 of the sensor unit 3 is in contact with the seat portion 2b of the stay 2, and the holding portion 2a is press-fitted or screwed into the mounting hole 306b provided in the bottom surface 306a. The sensor unit 3 is positioned and held by fitting in a magnetic or labyrinth shape.
Note that the stay 2 may be an integral structure with the component 1 to be measured when it is difficult to attach the component 1 to the measurement position.

  The unique information storage unit 201 includes an RFID, a one-dimensional barcode, a two-dimensional barcode, or the like. A QR code (registered trademark) is used as the two-dimensional barcode. The unique information may be information unique to the component 1, but may be basic information such as a model number or serial number of the component 1 or the stay 2 itself, such as the installation location, the shipping date, and the type of the component 1. In addition, internal specifications, use conditions thereof, and the like may be included.

The sensor unit 3 has a reading device 308 that is a means for reading the contents stored in the unique information storage means 201 provided in the stay 3 in a non-contact manner or in contact with the unique information storage means 201. The reading device 308 is provided so that the unique information storage unit 201 can be read in a state in which the sensor unit 3 is held in a state in which the state can be detected by the stay 2. The reading device 308 uses a tag reader when the unique information storage unit 201 is an RFID, and uses a barcode reader when the unique information storage unit 201 is a one-dimensional or two-dimensional barcode. The communication network communication device 508 of the information terminal 5 (FIG. 4), the together with the measurement data to the processing system 4 are denoted by the identification data of the sensor unit 3, and transmits the unique information read.

  In this embodiment, the sensor unit 3 includes a battery 305 and an A / D converter 301 (FIG. 3) in addition to the state detection sensor 302 such as the acceleration sensor 302a, the information storage device 303, the reading device 308, and the communication device 307. ).

  In the case of this embodiment, since the sensor unit 3 is detachable, the sensor unit 3 can also be used for measurement in each vehicle. Therefore, it is not necessary to purchase the sensor unit 3 for each component 1 to be measured, and the introduction cost can be reduced.

In particular, when the stay 2 is permanently installed in the component 1, the following advantages are obtained.
The offset amount is stable with respect to the mounting position of the sensor unit 3, particularly the rotational axis center O of the rotating portion 1 a of the component 1, and variations in measurement data due to mounting errors can be suppressed and measurement preparation can be performed in a short time.
Even if the sensor cannot be attached to the fixed part of the vehicle bearing or its peripheral parts, which is the part 1 to be measured, the stay 2 is provided to the movable part of the vehicle bearing or its peripheral parts. A sensor unit 3 having a sensor capable of measuring the state can be mounted.
・ Installation of the unique information storage device 201 in the stay 3 makes it easy to grasp the measurement target and enables measurement preparation in a short time.
・ It becomes easy to accumulate data and search past data.
-By specifying the part to be measured, it is possible to set abnormality determination information according to the environment for each part, not for each bearing part number. In addition, high-accuracy determination can be performed in consideration of disturbance.

In the above-described embodiment, the rolling bearing device with a pulley is shown as the component 1 to be detected. However, the component 1 may be another vehicle bearing or its peripheral components.
Vehicle bearings include alternator bearings, cell motor bearings, water pump bearings, hydraulic pump bearings, fan coupling bearings, compressor bearings, supercharger bearings, turbocharger bearings, idler pulley bearings, etc. Can be mentioned.
Peripheral parts include bearing shafts, nuts, pulley covers, belts, alternators, cell motors, water pumps, hydraulic pumps, fan couplings, compressors, superchargers, turbochargers, idler pulleys, and the like.

In addition, the mechanical component 1 to be detected is not limited to the bearing and its peripheral components, but the component state detection device can be effectively applied to other various components, particularly components having rolling elements. As a part having a rolling element other than the rolling bearing, a ball screw device shown in FIG. 6 can be cited.
6A includes a rolling element (not shown) that circulates and moves in the nut 82 between the screw shaft 81 and the nut 82, and the screw shaft 81 is interposed via a bearing 83. It is supported by a housing (not shown). The stay 2 is fixed to the end of the screw shaft 81, and the sensor unit 3 is detachably attached to the stay 2.

  In each of the above embodiments, the processing system 4 is provided apart from the sensor unit 2. However, the processing system 4 may be integrated with the sensor unit 3. Due to the development of miniaturization of electronic components, it is possible to process the measured information up to the sensor unit 3 without particularly increasing the size of the sensor unit 3. Thereby, it is not necessary to prepare another information terminal, and portability is further improved.

  As mentioned above, although the form for implementing this invention based on embodiment was demonstrated, embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1, 1A ... Component 1a ... Rotating part 2 ... Stay 3 ... Sensor unit 4 ... Processing system 101 ... Rolling bearing 102 ... Pulley 201 ... Specific information storage means 302 ... State detection sensor 302a ... Acceleration sensor 303 ... Information storage device 307 ... Communication Device 308 ... Reading device 602 ... Specification database (data storage unit)
603a ... Rotational speed calculation unit 603b ... Vibration calculation unit O ... Rotational axis center

Claims (4)

Comprising a sensor unit rotates integrally with the rotating portion the rotating part of the component is attached taken to be removably partially or entirely rotates, and a processing system for performing information processing,
The rotating part includes a rotating side wheel of a rolling bearing, and the sensor unit is provided at a position offset in the axial direction from a circumferential surface on which a raceway surface is formed in the rotating side wheel,
Before Symbol sensor unit at a position offset from the rotation axis center, and has an acceleration sensor having a sensitivity in the radial direction of the rotating, a communication device and for transmitting the measurement data of the acceleration sensor to the processing system,
The processing system includes: a rotation speed calculation unit that calculates a rotation speed of the rotation part of the part from a DC component of measurement data of the acceleration sensor; and a vibration value of the rotation part of the part from an AC component of the measurement data. A component state detection device having a vibration calculation unit for calculating. The component state detection device according to claim 1 , further comprising a stay fixed integrally with the rotating portion of the component, wherein the sensor unit is detachably attached to the stay. The component state detection device according to claim 2 , wherein the stay includes a unique information storage unit that indicates unique information of the component, and the sensor unit includes a reading unit that reads the unique information. In the component state detection apparatus according to any one of claims 1 to 3, wherein the processing system includes a data storage unit in which data for state determination comprising specifications of said components is stored, the acceleration The component state detection apparatus which has a state determination part which determines the state regarding the abnormality or lifetime of the said part using the said measurement data of a sensor, and the said data for state determination memorize | stored in the said data storage part.

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