JP6297444B2 - Status monitoring device for automotive wheel peripheral parts - Google Patents

Description

  The present invention measures the vibration or vibration and temperature of wheel bearing peripheral parts which are wheel bearings and peripheral parts thereof (for example, tires, wheels, hubs, knuckles, brakes, suspension members, etc.) and reference parts. The present invention relates to a state monitoring device for wheel peripheral parts for automobiles which detects an abnormality by the above and prevents an automobile accident beforehand.

Conventionally, for safe driving of automobiles, there are sensors provided on wheel bearings for detecting the rotational speed of each wheel, but even if an abnormality occurs in a part, only a phenomenon that causes rotational fluctuation can be captured. . For this reason, patents have been filed regarding automobile wheel bearings that can prevent problems from occurring and speed up maintenance by attaching sensors that detect situations other than rotational fluctuations. (Patent Document 1)
Further, in industrial fields such as railway cars 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 2)

JP 2003-187368 A JP 2012-02338 A

  For automobiles, input from the outside depending on the road surface (paved, unpaved), tire conditions (type, air pressure, wear, damage), and vehicle conditions (steer angle, speed, engine speed, load weight), etc. The vibration (disturbance) to be changed changes every moment. For this reason, in the method of attaching the sensor only to the wheel bearing and its peripheral parts, there is a problem that it is difficult to determine the vibration source and to determine whether or not the parts are normal.

The object of the present invention is to determine an abnormality by identifying a vibration source for a wheel bearing and its peripheral parts, to reduce the influence of disturbance noise, and to determine the presence / absence of an abnormality and to specify an abnormal part with high accuracy. It is providing the state monitoring apparatus of the wheel periphery components for motor vehicles which can be performed by.
Another object of the present invention is to make it possible to know the determination result of the presence / absence of an abnormality at a communication terminal of an administrator or user away from the automobile.

The state monitoring apparatus for wheel peripheral parts for automobiles according to the present invention accelerates the wheel peripheral part 2 which is one of the wheel bearing 2a and the peripheral part 2b of the automobile 1 and the reference part 7 away from the wheel peripheral part 2. Install sensors 3 and 5 respectively.
A data collecting device 9 that collects the signals of the acceleration sensors 3 and 5 and vehicle information that is information on the driving conditions of the vehicle 1;
A signal analysis unit 13 that analyzes the signal collected by the data collection device 9 and vehicle information, and an abnormality determination unit 14 that determines an abnormality of any part of the vehicle 1 using the result of the analysis,
The abnormality determination unit 14 extracts the information of the acceleration sensors 3 and 5 under a specific traveling condition determined from the vehicle information, and uses the information of the acceleration sensor 3 of the wheel peripheral component 2 as the acceleration sensor 5 of the reference part 7. By correcting with this information, disturbance input from the road surface and the vehicle body is excluded, and the corrected information is compared with the setting information, thereby determining the abnormal part and specifying the abnormal part in the wheel peripheral part 2 It is characterized by that.

The peripheral parts 2b of the wheel bearing 2a are, for example, tires, wheels, hubs, knuckles, brakes, suspension members, and the like. Even if an abnormality occurs in the wheel peripheral component 2 where it is desired to detect the abnormality, the reference portion 7 is difficult to transmit the abnormal vibration, and is located away from the wheel peripheral component 2 to a negligible extent, particularly in the wheel peripheral component 2. It is a location away from the component where the acceleration sensor 3 is installed, and may be unsprung, that is, a region below the suspension or on the spring. When the acceleration sensor 5 for reference is installed, it may be installed not only under the spring but also over the spring. When the acceleration sensor 3 or a temperature sensor 4 described later is installed on the wheel bearing 2a, it is preferable to install the acceleration sensor 3 or the vicinity of the fixed wheel.
The automobile information is information relating to the driving conditions of the automobile, and specifically, information obtained from the vehicle, for example, wheel speed, steering angle, engine speed, and the like.

  According to this configuration, the abnormality determination unit 14 extracts the information of the acceleration sensors 3 and 5 under a specific traveling condition determined from the vehicle information, and uses the information of the acceleration sensor 3 of the wheel peripheral component 2 as the reference part. 7 is corrected with the information of the acceleration sensor 5. As described above, the information of the acceleration sensors 3 and 5 is extracted under a specific traveling condition, and the information of the acceleration sensor 3 of the wheel peripheral component 2 is corrected by the information of the acceleration sensor 5 of the reference part 7. Therefore, it is possible to determine the abnormality by specifying the vibration source, to reduce the influence of disturbance noise on the wheel bearing 2a and its peripheral parts 2b, and to determine the presence / absence of abnormality and to specify the abnormal part with high accuracy. .

In the present invention, a data server 10 is provided, the data collection device 9 has a function of transmitting information to the data server 10, and the signal analysis unit 13 and the abnormality determination unit 14 include the data server 10 and the data collection unit. Designated when the data server 10 is provided in one of the devices 9 and the data server 10 determines that the abnormality determination unit 14 has detected a component abnormality and the function that enables the determination result by the abnormality determination unit 14 to be viewed by the communication terminal 11. You may have the terminal corresponding | compatible part 16 which has any one or both of the function which transmits a warning to the made communication terminal 11. FIG.
The communication terminal 11 may be a navigation device mounted on an automobile, a portable information terminal such as a mobile phone, or a personal computer fixedly installed in a management facility or a house.

  As described above, the data server 10 includes the terminal corresponding unit 16, a function for enabling the terminal to view the determination result by the abnormality determination unit 14, and a communication terminal specified when the abnormality determination unit 14 determines that a component abnormality has occurred. 11 has one or both of the functions of providing a service for sending a warning to the administrator, the administrator or the user can always grasp the presence or absence of the abnormality and the state of the abnormality.

In the present invention, a data server 10 is provided, and the data collection device 9 has a function of transmitting collection information to the data server 10.
The data server 10 receives a signal transmitted from the data collection device 9, a signal receiving unit 12 that analyzes the received signal, a signal analyzing unit 13 that analyzes the received signal, and any part of the vehicle using the result of the analysis An abnormality determination unit 14 for determining an abnormality of the data, a data storage unit 15 for storing signals obtained by the signal receiving unit 12, the signal analysis unit 13, and the abnormality determination unit 14, and a determination result by the abnormality determination unit 14 as a communication terminal 11. And a terminal corresponding unit having either one or both of a function for enabling browsing and a function for issuing a warning to the communication terminal 11 specified when the abnormality determination unit 14 determines that a component abnormality has occurred. good.

When this configuration is summarized and shown, the state monitoring device for wheel peripheral parts for automobiles according to the present invention includes a wheel peripheral part 2 which is one of the wheel bearing 2a and the peripheral part 2b of the automobile 1, and the wheel peripheral parts. Acceleration sensors 3 and 5 are installed in the reference part 7 away from 2,
A data collection device 9 that collects signals transmitted from the acceleration sensors 3 and 5 and vehicle information that is information related to the driving conditions of the vehicle 1 and transmits the information to the outside;
A signal receiving unit 12 that receives a signal transmitted from the data collecting device 9, a signal analyzing unit 13 that analyzes the received signal, and an abnormality of any part of the automobile 1 is determined using the result of the analysis. The communication terminal 11 can view the abnormality determination unit 14, the data reception unit 12, the signal analysis unit 13, the data storage unit 15 that stores the signals obtained by the abnormality determination unit 14, and the determination result by the abnormality determination unit 14. A data server 10 having a terminal corresponding unit 16 having either one or both of a function and a function of sending a warning to a communication terminal 11 designated when the abnormality determination unit 14 determines that a component abnormality has occurred;
The abnormality determination unit 14 extracts the information of the acceleration sensors 3 and 5 under a specific traveling condition determined from the vehicle information, and uses the information of the acceleration sensor 3 of the wheel peripheral component 2 as the acceleration sensor 5 of the reference part 7. Thus, the disturbance input from the road surface and the vehicle body is excluded, and the corrected information is compared with the setting information, thereby determining the abnormality and specifying the abnormal part in the wheel peripheral component 2.

  In the case of this configuration, the signals of the acceleration sensors 3 and 5 and the vehicle information are collected by the data collecting device 9 and transmitted to the data server 10, and the signal analysis unit 13 and the abnormality determination unit 14 of the data server 10 perform signal analysis and In order to perform abnormality determination, the vehicle 1 does not need to be equipped with a means for performing signal analysis or abnormality determination. By performing signal analysis or abnormality determination with a high-function data server 10 at a remote location, vibration analysis can be performed with high accuracy. Abnormality judgment can be performed.

In the present invention, the terminal correspondence unit 16 is designated when it is determined that a component abnormality has occurred in the data transmission / reception unit 16a that allows the communication information stored in the data storage unit 15 to be processed and viewed by the communication terminal 11, and the abnormality determination unit 14. It may be provided with both the warning transmission part 16b which performs the service which transmits a warning to the communication terminal 11 made. The designated communication terminal 11 may be, for example, a navigation device installed in a car, a portable information terminal such as a smartphone, or a personal computer fixedly installed in a management facility or a house. good. The user or administrator who handles the communication terminal 11 may be a vehicle owner, a vehicle driver, or an operation management company.
When the function of transmitting a warning to the designated communication terminal 11 is provided, the abnormality of the wheel peripheral parts can be grasped without the user actively browsing.

Further, in the present invention, a temperature sensor 4 is installed together with the acceleration sensor 3 of the wheel peripheral component 2, and the signal of the temperature sensor 4 is included in the information collected and transmitted by the data collecting device 9 to determine the abnormality. You may make it utilize for the abnormality determination by the part 14. FIG.
Since the abnormality of the wheel peripheral component 2 also appears in the temperature, the abnormality can be determined with higher accuracy by detecting the temperature together with the vibration and using it for the abnormality determination.

  In the present invention, the vehicle information includes an ECU 8a that performs cooperative control of the entire vehicle provided in the vehicle 1, various sensors provided in the vehicle 1, and a control area network 8b provided in the vehicle. Any of the information may be used, and the abnormality determination unit 14 may specify the travel condition using the information.

In the present invention, the data collection device 9 may convert the signal of each sensor into a digital signal by an A / D converter 9a provided therein.
Further, the data collection device 9 may detect the signal of each sensor as an analog signal and convert the analog signal into a digital signal by an A / D converter provided in each sensor.

  In the present invention, the abnormality determination unit 14 may determine abnormality from the peak or effective value of the vibration value at an arbitrary time. When the signal analysis unit 13 monitors the peak of the vibration value, it is possible to reduce the processing load and monitor many signals. When determining an abnormality from the effective value, a more accurate determination can be made.

  In the present invention, the abnormality determination unit 14 may determine abnormality by performing frequency part analysis processing on the signals of the acceleration sensors 3 and 5 obtained from the data collection device 9.

The state monitoring device for wheel peripheral parts for automobiles according to the present invention includes a wheel peripheral part which is one of the wheel bearings and its peripheral parts of an automobile, and an acceleration sensor at a reference part away from the wheel peripheral parts, A signal collecting unit for collecting signals of the respective acceleration sensors and vehicle information that is information relating to driving conditions of the vehicle, a signal analyzing unit for analyzing the signals collected by the data collecting device and the vehicle information, and An abnormality determination unit that determines an abnormality of any part of the automobile using a result, the abnormality determination unit extracts information of each acceleration sensor under a specific traveling condition determined from the automobile information, and the wheel By correcting the information of the acceleration sensor of the peripheral part with the information of the acceleration sensor of the reference part, the road surface and the vehicle In order to perform the determination of the abnormal part and the abnormal part in the wheel peripheral part by comparing the corrected information with the setting information, the vibration source is specified and the abnormality determination is performed. The influence of disturbance noise can be reduced, the presence / absence of abnormality and the identification of the abnormal part can be performed with high accuracy.
When the data server having the terminal corresponding unit is provided, it can be known from a communication terminal of an administrator or user away from the automobile.

It is explanatory drawing which shows the outline | summary of the state monitoring apparatus of the wheel periphery components for motor vehicles which concern on 1st Embodiment of this invention. It is a block diagram which shows the conceptual structure of the state monitoring apparatus of the wheel periphery components for the motor vehicles. It is a block diagram which shows the specific example of the signal processing part in the state monitoring apparatus. It is sectional drawing which shows an example of the wheel periphery components used as the monitoring object of the state monitoring apparatus. It is a flowchart of the outline | summary of operation | movement of the state monitoring apparatus. It is a block diagram which shows the conceptual structure of the state monitoring apparatus of the wheel periphery components for motor vehicles which concern on other embodiment.

  A first embodiment of the present invention will be described with reference to FIGS. In FIG. 1, this state monitoring device for wheel peripheral components for automobiles is a device that detects the occurrence of an abnormality in the wheel peripheral components 2 in the automobile 1 and prevents a vehicle accident beforehand. This state monitoring device includes an acceleration sensor 3 and a temperature sensor 4 which are sensors for detecting vibration and temperature of a wheel peripheral component 2 to be monitored, an acceleration sensor 5 and a temperature sensor 6 installed in a reference part 7, The vehicle information holding means 8 which has the vehicle information which is the information regarding the driving | running | working conditions of the motor vehicle 1, the data collection device 9, and the data server 10 are provided.

  The types of vehicles 1 to be monitored are vehicles that run on public roads or private roads, such as passenger cars, buses, trucks, tractors, trailers, commuters, ATVs (all-terrain vehicles), and two-wheeled vehicles. It is effective for vehicles in which drivers of passenger cars, large vehicles, commercial vehicles, etc. are not likely to notice abnormal noise and vibration.

The wheel peripheral part 2 indicates that it is either the wheel bearing 2a or its peripheral part 2b. The wheel bearing 2a may be a hub bearing integrated with a hub or a single bearing. A wheel bearing 2a shown in FIG. 1 is an example used for a truck, and as shown in an enlarged view in FIG. 4, a pair of wheels formed of a single row tapered roller bearing between a hollow axle 51 and a hub 52. A bearing 52 a is installed, and a hub 52 is connected to a drive shaft 53 inserted through the axle 51 by bolts.
In the example of FIGS. 1 and 4, the axle 51 and the hub 52 are one of the peripheral components 2b. Other peripheral components 2b include components such as tires, wheels, knuckles, brakes, and suspension members.

  The acceleration sensor 3 is installed in any one of the wheel bearing 2 a and the peripheral component 2 b constituting the wheel peripheral component 2, and the temperature sensor 4 is installed together with the acceleration sensor 3. The above “together” means that the temperature of the wheel peripheral component 2 whose vibration is detected by the acceleration sensor 3 can be detected. The temperature sensor 4 together with the acceleration sensor 3 may be unitized as a single unit by being installed on the same sensor case or substrate, or may be individually installed. The acceleration sensor 3 and the temperature sensor 4 are preferably installed on the fixed side of the wheel peripheral component 2, and in the example of the figure, the acceleration sensor 3 and the temperature sensor 4 are disposed on the outer peripheral surface of a hollow axle 51 that is one of the peripheral components 2b. A temperature sensor 4 is installed. These acceleration sensors 3 are installed in the wheel peripheral part 2 for each wheel (1) to (n) as shown in FIG. 2 and 3, the illustration of the temperature sensor 4 is omitted, but the temperature sensor 4 is also installed in the wheel peripheral component 2 for each wheel (1) to (n). In this example, the acceleration sensor 3 and the temperature sensor 4 are installed for all the wheels (1) to (n) of the automobile 1. However, any one of the wheels (1) to (n) may be used. You may install only with respect to a wheel.

  Moreover, in FIG. 1, the acceleration sensor 5 and the temperature sensor 6 are installed in the reference site | part 7 which is a place away from the wheel periphery component 2 used as an abnormality determination object site | part or a monitoring object part. Specifically, the reference part 7 is a part that is far from the wheel peripheral part 2 to such an extent that the abnormal vibration is hardly transmitted and can be ignored even when an abnormality occurs in the wheel peripheral part 2 for which abnormality is desired to be detected. It is a place away from the part where the acceleration sensor 3 is installed among the wheel peripheral parts 2. The reference part 7 may be unsprung, that is, a part below the suspension (not shown) or on the spring. Further, the reference acceleration sensor 5 and the temperature sensor 6 may be installed both under the spring and over the spring. In this embodiment, as shown in FIG. 2, the acceleration sensor 5 and the temperature sensor 6 (the temperature sensor 6 is not shown in FIG. 2) are installed with the reference part 7 as the vehicle body 7a.

  The automobile information is information relating to the driving conditions of the automobile 1, and specifically, information obtained from the vehicle, such as wheel speed, steering angle, engine speed, and the like. The vehicle information is detected by sensors, for example, but is stored in the ECU 8a (FIG. 1) that performs cooperative control of the entire vehicle, the CAN device 8b that constitutes the CAN (control area network) of the vehicle, and the like. Data is collected by the data collection device 9 from the vehicle information holding means 8 such as the ECU 8a and the CAN device 8b. The vehicle information may be directly input to the data collection device 9 from sensors (not shown) that detect the wheel speed, the steering angle, the engine speed, and the like. The ECU 8a, the CAN device 8b, and sensors are collectively referred to as automobile information holding means 8.

The data collection device 9 is a device that collects the signals from the acceleration sensors 3 and 5, the signals from the temperature sensors 4 and 6, and the vehicle information obtained from the vehicle information holding means 8 and transmits the vehicle information to the outside. . As shown in FIG. 2, the data collection device 9 includes an A / D changer 9a and a signal transmitter 9b, and is a detection signal of each sensor (acceleration sensors 3 and 5, temperature sensors 4 and 6). The analog signal is A / D converted by the A / D changer 9a and collected by the signal transmitter 9b. The vehicle information (wheel speed, steer angle, engine speed, etc.) of the vehicle information holding means 8 is a digital signal in the example of the figure and is directly collected by the signal transmitter 9b.
The signal transmitter 9b wirelessly transmits the collected signal to the data server 10. This transmission uses a mobile communication network such as a 3G line in this example. Further, the signal transmitter 9b uses a communication facility (not shown) installed in the automobile and transmits it through the mobile communication network.
Although not shown, the data collection device 9 has means for storing the information A / D converted by the A / D changer 9a and the information collected directly by the signal transmitter 9b. The information is collected or divided appropriately and transmitted. The data collection device 9 may have a means for analyzing the collected information, and the analyzed information may be transmitted. This analysis is an analysis that is a pre-process of the analysis performed by the data server 10.

  The data server 10 is a computer installed in a facility such as a data center managed by a bearing manufacturer, for example, and is connected to the above-described communication line network such as mobile communication. The data server 10 includes a signal receiving unit 12 that receives a signal transmitted from the data collecting device 9, a signal analyzing unit 13 that analyzes the received signal, and a wheel peripheral component of the automobile 1 that uses the result of the analysis. 2, an abnormality determination unit 14 that determines an abnormality of any one of the components, a signal storage unit 13 that stores the signals obtained by the signal reception unit 13, the signal analysis unit 13, and the abnormality determination unit 14, and a terminal correspondence unit 16. And have.

  FIG. 3 shows a specific example of the signal analysis unit 13. The signal analysis unit 13 is configured as a signal processing unit, and includes a data extraction unit 13a, FFT processing units 13b and 13c, and an error correction unit 13d. The data extraction unit 13a is a vibration signal output from the acceleration sensor 3 of each wheel (wheel (1) to wheel (n)) and a vibration signal output from the acceleration sensor 5 on the vehicle body 7b serving as the reference part 7. A reference vibration and vehicle information output from the vehicle information holding means 8 are input and collected.

The data extraction unit 13a extracts a signal that matches a preset driving condition from the collected vibration signal, reference vibration, and vehicle information. The signal and information extraction conditions are arbitrarily set conditions such as the vehicle speed and the steering angle in the vehicle information. As a specific example, the traveling speed is not more than a set speed (for example, 40 km / h) and the vehicle is traveling straight ahead. By setting an arbitrary traveling condition and extracting a signal that matches the condition, it is possible to reduce the fluctuation in acceleration due to a change in the traveling state, so that an abnormality determination described later can be performed with higher accuracy.
For example, the above-described arbitrary traveling conditions limit the range of the vehicle speed and the steering angle. Furthermore, a plurality of extraction conditions may be set according to the abnormality determination target.

  The extracted vibration signal and reference signal, which are acceleration signals, are subjected to FFT (frequency analysis) processing by FFT processing units 13b and 13c, respectively. The FFT processing result of the vibration signal of each wheel (1) to (n) is corrected by the error correction unit 13d using the FFT processing result of the reference signal. By correcting in this way, the abnormality determination unit 14 (FIG. 2) can perform abnormality determination with higher accuracy. The correction by the error correction unit 13d is, for example, a process of correcting a vibration value that has changed due to an influence of a load load, an input load from a road surface, a wind, or the like.

The abnormality determination unit 13 is a means for determining the state of the component of the wheel peripheral component 2, particularly its abnormality. In this example, the abnormality determination unit 13 determines abnormality by comparing vibration signals such as acceleration signals of the respective wheels (1) to (n) corrected by the FFT processing as described above with setting information.
The abnormality determination method by the abnormality determination unit 13 is, for example, one of the following.
(1) Compare the signal values in the preset frequency band.
(2) Look at the changes in the natural vibration frequency of each component that makes up the wheel peripheral component 2.
(3) Compare the vibration signal magnitude of each wheel (1) to (n).
(4) Comparing the accumulated data in time series as a setting standard and judging abnormality.
The vibration signals and abnormality determination results of the wheels (1) to (n) processed as described above are stored in the data storage unit 15.

  The terminal correspondence unit 16 includes a data transmission / reception unit 16a that transmits / receives information stored in the data storage unit 15 to / from the communication terminal 11. By the data transmission / reception unit 16a, the determination result by the abnormality determination unit 14 and the signal analysis unit 13 Analysis results and the like can be viewed on the communication terminal 11. Moreover, the terminal corresponding | compatible part 16 has the warning transmission part 16b which transmits a warning to the communication terminal 11 designated when it determined with abnormality determination part 14 having abnormality.

  The communication terminal 11 is a communication terminal held by an administrator or a user, and includes a display device 11a such as a liquid crystal display device that can display an image. The communication terminal 11 is an information processing apparatus such as a personal computer, a tablet, or a smartphone. The communication terminal 11 and the data server 10 are performed using a communication line network such as mobile communication. This communication line network may be the same line network as the communication line network connecting the data server 10 and the data collection device 9 of the automobile 1 or may be a different line network. The manager and the user may be a vehicle owner, a vehicle driver, or an operation management company.

  The terminal corresponding unit 16 of the data server 10 allows an administrator or a user to edit / browse information recorded in the data server 10 from a remote location using the communication terminal 11 which is a data communication means such as a personal computer. It is possible. In addition, when it is determined that there is an abnormality, it is possible to grasp the normal state by having a function of issuing a warning from the data server 10 to the administrator or user's communication terminal 11 using a warning mail or the like. The contact information in the event of an abnormality is sent to a pre-registered e-mail address, for example, the e-mail address of a driver or management company, and a warning is sent to the navigation system installed in the dedicated software (application program) or vehicle 1 Information shall be automatically transmitted. The transmission of an abnormality by the terminal correspondence unit 16 may be communicated to the driver via a drive recorder that also serves as the communication terminal 11 mounted on the monitored automobile 1, a digital tachograph, or the like.

In the above embodiment, the wheel bearing 2a of the taper bearing is described in FIGS. 1 and 4, but the wheel bearing 2a may be a ball bearing or a unit with a hub. In particular, in the case of the unitized wheel bearing 2a, it is difficult to check the internal state of the bearing at the time of automobile inspection. Therefore, the state monitoring by the state monitoring device of this embodiment is more effective.
The mounting range of the acceleration sensor 3 for detecting an abnormality is to be mounted around any wheel where an abnormality is to be detected, and may be a place where vibration is transmitted in the event of an abnormality.
The mounting range of the reference acceleration sensor 5 is preferably a place where abnormal vibrations are difficult to be transmitted even when an abnormality occurs in a component for which an abnormality is to be detected.

Moreover, in the said embodiment, although the FFT process is implemented as a signal analysis process in the signal analysis part 13, the signal analysis part 13 may compare the vibration value of raw data. When the signal analysis unit 13 monitors the peak of the vibration value, it is possible to reduce the processing load and monitor many signals.
The vibration signal processed by the signal analysis unit 13 may be an effective value of the raw data in an arbitrary time range. In any case, it is possible to identify abnormal parts by inputting and storing in advance the specifications of the parts (bearing specifications, number of hub bolts, natural frequency of each part, etc.).

  In the above-described embodiment, when the temperature sensor 4 is provided, the temperature sensor 4 measures the temperature of the component that becomes the wheel peripheral component 2, for example, when the brake travels in a locked state or the bearing is seized. When it happens, the abnormality determination unit 14 can determine the abnormality more accurately. In particular, if the temperature rises rapidly, there is a possibility of a vehicle fire. Therefore, a major accident can be caused by notifying the driver by issuing an emergency warning from the data server 10 to the communication terminal 11 mounted on the automobile 1. It is possible to ensure the safety of the automobile 1 and the driver before the vehicle arrives.

The operation of the above configuration will be described together with various modified examples and described with reference to FIG.
Vehicle information (wheel speed, steering angle, engine speed, etc.) (step S1), which is information related to traveling of the vehicle 1, and detection signals (step S2) of the sensors (acceleration sensors 3, 5, temperature sensors 4, 6) Is digitized (step S3), acquired by the data collection device 9 (step S4), and transmitted to the data server 10.

In the data server 10, vibration values are analyzed from the acquired acceleration sensors 3 and 5 (frequency analysis, etc.) (step S5), the peak level of the frequency spectrum, the signal sum of the limited frequency band, the rotation order of the signal, etc. Is compared with the acceleration sensor 5 of the reference part 7 to determine whether there is an abnormality and the part. In this case, the accuracy of discrimination is improved by combining the temperature information obtained from the temperature sensors 4 and 6. The analysis result is stored in the data storage unit 15 (step S6).
Also, based on the vehicle information, only the values of each sensor at the time of a specific driving condition (for example, 40 km / h × straight forward) are extracted, subjected to FFT processing, and the disturbance data using the vibration data of the reference part 7 and each axle By reducing the influence of noise, abnormality determination accuracy can be improved.
When comparing with the accumulated data in time series and comparing the temperature data of each wheel, the accuracy of abnormality determination can be improved.

When an abnormality occurs, the abnormality can be notified by contacting a user such as a driver via a drive recorder or a digital tachograph or by sending a warning mail from the data server 10 to a management company or the like (step) S7).
When an abnormality occurs, a warning can be sent to a registered e-mail address, or when an abnormality occurs, a warning can be sent to dedicated software to notify the abnormality. An administrator of the management company or the like who is informed of the abnormality can make an emergency contact to the user by telephone or the like (step S8).
In addition, the user, the contractor, and the like can check the operation status in the data storage unit 15 of the data server 10 that is the analysis result storage destination from dedicated software or the like (step 9).
For data transfer, it is also possible to use mobile communication means (mobile phone, smartphone, notebook PC, tablet terminal, etc.).

According to the state monitoring apparatus for the wheel peripheral parts for automobiles of this embodiment, the presence or absence of abnormality and the abnormal part are increased by reducing the influence of disturbance noise on the wheel bearing 2a and its peripheral part 2b. Can be specified with accuracy.
By detecting abnormalities at an early stage, serious accidents can be prevented and maintenance time / costs can be reduced by narrowing down the locations where defects occur.

  FIG. 6 shows another embodiment of the present invention. In the first embodiment, as shown in FIG. 2, the data analysis unit 13 and the abnormality determination unit 14 (FIG. 2) are provided in the data server 10, but the signal analysis unit 13 and the abnormality determination unit 14 are shown in FIG. As described above, the data collection device 9 mounted on the automobile 1 may be provided. In that case, the abnormality determination result of the abnormality determination unit 14 is displayed on a display device (not shown) or the like that can display an image installed on the console or the like of the driver's seat of the automobile 1. The signal transmitter 9 b of the data collection device 9 transmits the analysis result of the signal analysis unit 13 and the determination result of the abnormality determination unit 14 to the data server 10. In the data collection device 9a, the sensor signal converted by the A / D converter 9a and the collected vehicle information are stored in the collected data storage unit 15A, the analysis result of the signal analysis unit 13, and the determination result of the abnormality determination unit 14 Is stored in the processing data storage unit 15B. All of the stored information may be transmitted to the data server 10 and stored in the data storage unit 15.

As described above, when the data analysis is performed by the data collection means 9 such as the in-vehicle transmitter and the analysis result is transmitted to the data server 10, the abnormality determination can be performed without being influenced by the communication environment or the like. Further, when the analysis result and the abnormality determination result are transmitted to the administrator or user communication terminal 11 via the data server 10, when the automobile 1 is a business vehicle such as a truck or a bus, not only the driver. The management company can grasp the situation of the wheel peripheral component 2 and proceed with preparation for the countermeasure.
In addition, in this embodiment, the matters other than those specifically described are the same as those in the first embodiment described with reference to FIGS.

DESCRIPTION OF SYMBOLS 2 ... Wheel peripheral component 2a ... Wheel bearing 2b ... Peripheral component 3, 5 ... Acceleration sensor 4, 6 ... Temperature sensor 7 ... Reference part 7a ... Car body 8 ... Automobile information holding means 8a ... ECU
8b ... CAN device 9 ... data collection device 10 ... data server 11 ... communication terminal 12 ... signal reception unit 13 ... signal analysis unit 14 ... abnormality determination unit 15 ... data storage unit 16 ... terminal correspondence unit 16a ... data transmission / reception unit 16b ... warning Transmitter

Claims (10)

Install the acceleration sensor in the wheel peripheral part which is one of the bearings for automobile wheels and its peripheral parts, and the reference part away from this wheel peripheral part,
A data collection device for collecting vehicle information, which is a signal of each acceleration sensor, and information relating to the driving conditions of the vehicle;
A signal analysis unit that analyzes the signal and vehicle information collected by the data collection device, and an abnormality determination unit that determines an abnormality of any part of the vehicle using the result of the analysis, the abnormality determination unit, By extracting the information of each acceleration sensor under a specific driving condition determined from the vehicle information, and correcting the information of the acceleration sensor of the wheel peripheral part with the information of the acceleration sensor of the reference part, the disturbance from the road surface and the vehicle body A state monitoring device for wheel peripheral parts for automobiles, wherein input is excluded, and the corrected information is compared with setting information to determine the abnormal part and identify the abnormal part in the wheel peripheral part.   In the state monitoring device of the wheel peripheral parts for automobiles according to claim 1, a data server is provided, the data collection device has a function of transmitting information to the data server, and the signal analysis unit and the abnormality determination unit are Provided in either the data server or the data collection device, and when the data server determines that the abnormality determination unit has detected a component abnormality, and a function that enables the determination result by the abnormality determination unit to be viewed on a communication terminal. A state monitoring device for wheel peripheral parts for automobiles having a terminal corresponding unit having either one or both of functions of transmitting a warning to a designated communication terminal. The state monitoring device for wheel peripheral parts for an automobile according to claim 1, wherein a data server is provided, and the data collection device has a function of transmitting collection information to the data server,
The data server includes a signal reception unit that receives a signal transmitted from the data collection device, a signal analysis unit that analyzes the received signal, and determines an abnormality of any part of the vehicle using the result of the analysis. An abnormality determination unit, a data storage unit that stores signals obtained by the signal reception unit, the signal analysis unit, and the abnormality determination unit, a function that enables a determination result by the abnormality determination unit to be viewed on a communication terminal, and the abnormality determination Having a terminal-compatible part that has one or both of the functions of sending a warning to a designated communication terminal when it is determined that a component abnormality has occurred in the part,
A state monitoring device for wheel peripheral parts for automobiles.   4. The state monitoring apparatus for wheel peripheral parts for automobiles according to claim 2 or claim 3, wherein the terminal corresponding unit is a data transmission / reception unit that enables processing and browsing of storage information of the data storage unit by a communication terminal, and A state monitoring device for automotive wheel peripheral parts, comprising a warning transmission unit that provides a service for transmitting a warning to a designated communication terminal when the abnormality determination unit determines that a component abnormality has occurred.   The state monitoring device for automotive wheel peripheral parts according to any one of claims 1 to 4, wherein a temperature sensor is installed together with the acceleration sensor of the wheel peripheral part, and the signal of the temperature sensor is A state monitoring device for automobile wheel peripheral parts that is included in information collected and transmitted by a data collection device and used for abnormality determination by the abnormality determination unit.   6. The state monitoring apparatus for wheel peripheral parts for an automobile according to any one of claims 1 to 5, wherein the automobile information is provided in an ECU for performing cooperative control of the entire vehicle provided in the automobile, and in the automobile. Information of any of the various sensors provided and the control area network provided in the automobile, and using this information, the abnormality determining unit is configured to identify the vehicle wheel peripheral component for specifying the traveling condition. Condition monitoring device.   The state monitoring device for wheel peripheral parts for automobiles according to any one of claims 1 to 6, wherein the data collection device digitally outputs signals from the sensors by an A / D converter provided therein. A state monitoring device for automotive wheel peripherals that convert signals.   The state monitoring device for wheel peripheral parts for automobiles according to any one of claims 1 to 7, wherein the data collection device detects a signal of each sensor as an analog signal, and the analog signal is A state monitoring device for wheel peripheral parts for automobiles which is converted into a digital signal by an A / D converter provided in each sensor.   9. The state monitoring apparatus for wheel peripheral parts for automobiles according to claim 1, wherein the abnormality determination unit is for an automobile that determines abnormality from a peak or effective value of a vibration value at an arbitrary time. A state monitoring device for wheel peripheral parts.   10. The state monitoring apparatus for wheel peripheral parts for automobiles according to claim 1, wherein the abnormality determination unit performs frequency part analysis processing on the signal of the acceleration sensor obtained from the data collection device. A state monitoring device for wheel peripheral parts for automobiles that determines an abnormality based on the situation.

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