JP2017062148A - Automatic determination system for state of machine components - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic determination system that can be used for multiple machine components, automatically determine the type of each machine component or information for individual discrimination, make input operations unnecessary and eradicate wrong inputting, enhance the accuracy of determination by improving the reproducibility and precision of measured results and, even in the event of discontinuation of communication due to poor communication environment and the like, continue to transmit measured data.SOLUTION: Each machine component 1 is equipped with unique information storage means 4 which is RFID or the like indicating unique information. To this machine component 1, a sensor unit 2 is detachably fitted. The sensor unit 2 has a state detecting sensor 6, such as a vibration sensor, for measuring the state of the machine component 1, a reading device 7 for reading the unique information of the unique information storage means 4 and a memory device 28 for storing measured data. From the unique information obtained by this sensor unit 2, information for determination to be used in determining the state of the machine component 1 is selected. By using the information for determination, determination of the state of the machine component 1, such as abnormality determination, is performed from the measured data.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a machine component state automatic determination system that determines whether there is an abnormality in a machine component having a movable part such as a rolling element represented by a vehicle bearing or a peripheral component.

2. Description of the Related Art Conventionally, in the industrial field such as railway vehicles and windmills, a permanent type monitoring system has been proposed in which an acceleration sensor, a rotation sensor, a temperature sensor, and the like are installed on bearings and their peripheral components, and the operation state is monitored. (Patent Document 1)
In addition, a handy-type measurement system that monitors the status by using a portable information terminal device such as a smartphone, data processing and storage on a server, etc., and comparing it with past data is proposed. ing. (Patent Document 2)

In addition to this, a system for transmitting data detected by a sensor to a server via a portable information terminal or the like, arranging a user interface function in a plurality of personal computers, and sharing measurement data, analysis means, and diagnosis results Has been proposed. (Patent Document 3)
There has also been proposed a system in which a data analysis program, determination reference data, and a determination program are downloaded to a user information processing terminal and a measurement data diagnosis process is performed on the information processing terminal. (Patent Document 4).

JP 2012-02338 A JP 2013-228352 A Japanese Patent No. 421064 Japanese Patent No. 385977

  Currently, for bearing inspections, subjective judgments that rely on the five senses of the mechanic, such as appearance, feeling of sensation, 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 increase the accuracy of state determination, and the above-described conventional techniques and the like have been proposed. However, the prior art has the following problems.

  The permanent monitoring system disclosed in Patent Document 1 and the like has an advantage that it can always be monitored even in a remote place, but a sensor is required for each measurement site, and the equipment is expensive. In addition, there is a possibility that the position may be shifted from the previous time during reassembly, and there are concerns such as deterioration in measurement accuracy, reproducibility, and instability.

The handy-type measurement system disclosed in Patent Document 2 has the advantages of excellent portability and low cost. However, each time the measurement target changes, the measurement unit changes when using a single sensor unit for multiple measurement targets. Settings such as the name of the object, measurement conditions (specifications of the object to be measured), etc., or input / selection of information on the type and identification information of the object to be measured must be changed. For this reason, it takes time for input work, and there is a concern that a setting error may occur. For example, when data is shared, it is necessary to make rules for setting names, and there are concerns about setting / selection errors, information overwriting / loss, and the like.
Patent Documents 3 and 4 also do not propose an improvement plan for setting work such as input / selection of information about the type of measurement object and individual information.

Further, when performing vibration measurement, in determining an abnormality of a bearing or the like, a calculation based on the bearing specifications is a threshold value, but the determination accuracy is reduced in an environment where disturbance is large.
For example, in the case of a device that has multiple moving parts near the excitation source (engine), such as an engine auxiliary machine, each connected by a belt, etc. It is necessary to measure as close as possible. Moreover, when detecting the state of a movable part, although the measurement in a movable part is effective, the concrete method is not specified in any said patent documents 1-4.

  Furthermore, in the proposal of Patent Document 3, a PC (personal computer) is required for displaying the diagnosis result, and when checking the result at the measurement site, the measurement portable terminal and the PC must be measured and diagnosed as a set. I must.

  As means for solving the above-described problems, an attachment / detachment type sensor unit that maintains a fixed state of the sensor unit by providing a stay in the measurement unit has been tried. However, when the distance between the sensor unit and the information terminal is long, or when the communication environment is bad, such as when there is an obstacle between the sensor unit and the information terminal, there is a possibility that transfer data may be lost due to the interruption of communication. There is also a concern that the measurement data may be deleted due to an operation error on the information terminal.

  The object of the present invention is to be used for a plurality of machine parts, and can automatically determine the type of machine parts to be measured and the information for individual identification, eliminating the need for input operations, eliminating input errors, and measuring results. Measured data can be transmitted without re-measurement even if communication is interrupted due to poor communication environment or unexpected data deletion, etc., due to improved reproducibility and accuracy. It is an object to provide an automatic state determination system for machine parts.

The machine part state automatic determination system according to the present invention includes:
Unique information storage means 4 provided in the machine part 1 and showing unique information of the machine part 1;
A state detection sensor 6 that is detachably attached to the machine part 1 and measures the state of the machine part 1, a reading device 7 that reads the unique information from the unique information storage unit 4, and measurement data detected by the state detection sensor 6 A sensor unit 2 having a storage device 28 for storing data and a communication device 18 for transmitting the measurement data and the unique information;
From the unique information read by the reading device 7 of the sensor unit 2, selected determination information used for determining the state of the mechanical component 1 is selected, and the output of the state detection sensor 6 is used using the selected determination information. And a processing system 5 that performs a determination on a predetermined state of the mechanical component 1 based on the measured data.
The processing system 5 includes re-transfer instruction means 29 for instructing the sensor unit 2 to re-transfer the measurement data when the measurement data has a communication defect.
It is characterized by that.

According to this configuration, the mechanical component 1 has the unique information storage unit 4, and the sensor unit 2 has the state detection sensor 6 and the reading device 7 that reads the unique information. Therefore, the machine part 1 can be automatically specified from the unique information read by the sensor unit 2, and even if this state automatic determination system is used for a plurality of machine parts 1, an input operation for specifying the machine part 1 is not performed. This eliminates the need for input errors. For example, simply attach the sensor unit 2 to the machine part 1 to be measured and give a command to start measurement with a switch, etc., and automatically handle the machine part 1 to be measured without any other input operation. It is possible to select determination information such as a threshold value to be determined, and to appropriately determine a predetermined state such as abnormality determination.
That is, information for determination such as a threshold value according to the type of the machine part 1, for example, a threshold value according to machine part specifications such as bearing specifications, is used for state determination such as abnormality diagnosis of the machine part 1. The determination information corresponding to the component type can be automatically selected from the unique information read by the sensor unit 2. Therefore, operations such as information input / selection are not required.
In addition, since the sensor unit 2 is detachably attached to the machine part 1, unlike the conventional apparatus that simply presses the probe, the positional relationship between the machine part 1 and the sensor unit 2 is stable, so that the reproducibility of the measurement results is achieved. Thus, the determination accuracy can be improved by improving the accuracy. Further, the sensor unit 2 may be attached to the machine part 1 only when measurement is necessary, and the use of the machine part 1 is not hindered.

The sensor unit 2 has a storage device 28, and the measurement data detected by the state detection sensor 6 is temporarily stored in the storage device 28 of the sensor unit 2, and the stored measurement data or the storage The measurement data sent directly without going through the device 28 is sent to the processing system 5 by the communication device 18. Therefore, when the distance between the sensor unit 2 and the processing system 5 is far away, or when the communication environment is bad due to an obstacle between the sensor unit 2 and the processing system 5, the measurement is performed because communication is interrupted. Even if data is lost, the measurement data is not lost, and the measurement data can be retransmitted, and there is no need to remeasure. Even if measurement data is deleted due to an operation error, it can be retransmitted.
Further, the processing system 5 includes a re-transfer instruction means 29 that instructs the sensor unit 2 to re-transmit the measurement data when the measurement data has a predetermined defect. Therefore, it is possible to automatically detect that the measurement data is defective and retransmit it.
The storage device 28 is unnecessary if it can be confirmed that the measurement data is correctly transmitted to the processing system 5, and may be a temporary storage for storing the measurement data until then.

In the present invention, the storage device 28 of the sensor unit 2 may be an SD card, another semiconductor storage medium, or a hard disk device.
If these are used, the storage device 28 can be configured easily.

In the present invention, the sensor unit may include an acceleration sensor, a rotation sensor, or a gyro sensor as the state detection sensor.
If measurement data obtained by these acceleration sensor, rotation sensor, or gyro sensor is used, a necessary abnormality of the machine part 1 can be determined.

In the present invention, the processing system 5 in FIG. 3 includes an information terminal 8 and a data server 9 connected to the information terminal 8 via a communication network 51. The information terminal 8 receives the measurement data and the data from the sensor unit 2. Specific information is obtained and transmitted to the data server 9. The data server 9 has a specification database 32 that stores specification information of machine parts corresponding to the specific information, and is transmitted from the information terminal 8. In addition, automatic identification of the machine part 1 and selection of the specification information are performed based on the unique information, and an analysis condition is determined using the information storage unit 31 and / or the specification database 32 using the selected specification information. A condition may be determined, and the data analysis and the state determination may be performed on the measurement data.
In the case of this configuration, it is possible to determine the state using the specification database 32 of the data server 9 and the like, and an improvement in determination accuracy can be expected.

In the present invention, the processing system 5 in FIG. 5 includes the information terminal 8A and a data server 9 connected to the information terminal 8A via a communication network 51. The information terminal 8A receives the measurement data and the data from the sensor unit 2. A communication processing unit 21A that obtains the unique information and transmits the unique information to the data server 9, a data analysis unit 44, and a state determination unit 43. The data server 9 corresponds to the unique information. Then, the specification database 32 storing the specification information of the machine part 1 and the unique information transmitted from the information terminal 8A perform automatic identification of the machine part 1 and selection of the specification information, and transmit to the information terminal 8A. Communication processing unit 36, and the data analysis unit 44 and the state determination unit 43 of the information terminal 8 </ b> A are transmitted from the data server 9 before With specification information, the analysis and determination of the state by the measurement data obtained from the sensor unit 2 may be performed, respectively.
Even if information terminals in recent years are portable terminals such as personal computers, smartphones, tablets, etc., the arithmetic processing function has been dramatically improved, and state determination processing such as abnormality determination with sufficient accuracy and processing speed Can be done. However, when the information for determination such as threshold values and past data is used for a plurality of machine parts 1, the amount of data becomes enormous and is difficult to store in the information terminal 8 at hand and is wasteful. Therefore, as described above, the determination information is stored in the data server 9 and transmitted from the data server 9 to the information terminal 8A, that is, the data server 9 is simply used as a database, and the information terminal 8A determines its state. By performing only the above processing, it is possible to effectively use the advanced processing function of the information terminal 8A, and to determine the state while reducing the burden on the data server 9 and the usage cost of the data server 9.

In this invention, when the data server 9 is configured to perform the state determination, the data server 9 is configured to perform state measurement on the mechanical component 1, state data obtained by state measurement, analysis result, state determination result, measurement condition, An information storage unit 31 that stores part history and the like as history information of the machine part 1 is provided, and the data server 9 has a function of performing the state determination using the history information of the machine part 1. Also good.
Even if it is normal by performing state determination such as abnormality determination with a threshold value determined from machine part specifications for each type of machine part 1, it may become abnormal if it is determined using past determination information about the individual And vice versa. Therefore, by performing state determination using history information in addition to state determination by type and performing comprehensive determination from the results of both determinations, the accuracy of determination such as abnormality determination is improved.

  In the present invention, when the information terminal 8 is configured to perform the state determination, the data server 9 transmits the state data, measurement conditions, determination results, data analysis results, and the like for the mechanical part 1 in the information terminal 8. An information storage unit 31 that stores the history information of the machine part 1 is included, and the state determination unit 43 and the data analysis unit 44 of the information terminal 8 use the history information of the machine part 1 to perform the analysis and state determination. It is also possible to have a function of performing each of the above. In this case as well, the state determination using history information is performed in addition to the state determination by type, and the overall determination is performed based on the results of both determinations, thereby improving the accuracy of determination such as abnormality determination.

In the present invention, when the data server 9 is configured to perform the state determination, the data server 9 transmits the determination to a registered display terminal 52 different from the information terminal 8 that has transmitted the measurement data. You may make it have the communication processing part 36 which transmits a result.
The registered display terminal 52 is, for example, a terminal of a predetermined management department of a bearing manufacturer. As a result, an engineer having specialized knowledge can quickly know the diagnosis result and quickly take appropriate measures.

In the present invention, the information terminal 8 is a general-purpose information terminal, and installs dedicated software for performing communication with the sensor unit 2, communication with the data server 9, and processing related to the state of the machine component 1. An operation system 24 having a function may be provided.
In the case of this configuration, a general-purpose information terminal, for example, a general personal computer, a smart phone, a tablet terminal, or the like can be used as the information terminal 8 used in the machine component state automatic determination system by dedicated software serving as an application program.
This configuration can be applied to either the case where the data server 9 performs information determination processing or the case where the data server 9 is used as an information database.

In the present invention, the mechanical component 1 may be a mechanical component having rolling elements. The machine component 1 having rolling elements is a rolling bearing, a constant velocity joint, a ball screw, or the like.
The mechanical component 1 having such a rolling element has a strong demand for state determination in order to maintain normal operation, and the state determination requires complicated calculation processing and a large amount of information for determination. Therefore, the above-described effects of the present invention are more effectively exhibited.

In the present invention, the mechanical component 1 may include a stay 3 that detachably holds the sensor unit 2, and the unique information storage unit 4 may be provided in the stay 3.
By assembling the sensor unit 2 using the stay 3 fixed integrally with the mechanical component 1 to be measured, high-precision repeated measurement with small assembling error is possible. The mounting portion of the stay 3 that becomes the mounting portion of the sensor unit 2 can be either a fixed portion of the mechanical component 1 or a movable portion. When attaching the stay 3 to a movable part, it is preferable to attach on the movable part core. The measurement on the movable part core enables measurement that is not easily affected by disturbances such as vibrations caused by other parts.
Moreover, the time for attaching the sensor unit 2 to the mechanical component 1 is shortened by having the stay 3.
When the unique information storage means 4 is provided in the stay 3, the state detection and the reading of unique information are closer to each other than when the stay 3 and the unique information storage means 4 are provided separately. It is easy to perform, and the advantage that it can be performed collectively by the sensor unit 2 is also obtained.

In this invention, the data server 9 has a function of performing the data analysis and the state determination, and the information terminal 8 performs the data analysis and the state determination by the information terminal 8 in accordance with setting conditions. Or automatic state determination system for machine parts having a function of switching between data server 9 and data server 9.
The state determination at the information terminal 8 at hand requires less usage time of the data server 9, and the state determination can be performed at low cost. However, when a large amount of state determination is performed, the information terminal 8 may take too much processing time. Therefore, it is convenient to use if it is possible to switch the state determination between the information terminal 8 and the data server 9 according to the situation.

  An automatic state determination system for a machine part according to the present invention includes a unique information storage means provided in a machine part for indicating unique information of the machine part, and a state detection that is detachable from the machine part and measures the state of the machine part. A sensor unit having a sensor, a reading device that reads the unique information from the unique information storage means, a storage device that stores measurement data detected by the state detection sensor, and a communication device that transmits the measurement data and the unique information; The measurement data output from the state detection sensor is selected from the specific information read by the reading device of the sensor unit, and the predetermined determination information used for determining the state of the machine part is selected. And a processing system for performing a determination on a predetermined state of the mechanical component by using the processing system. When the measurement data has a defect in communication, the sensor unit has a re-transfer instruction means for instructing re-transfer of the measurement data. Therefore, the machine is used for a plurality of machine parts and is a measurement object. It can automatically determine the type of parts and individual identification information, eliminates the need for input operations, eliminates input errors, improves the reproducibility of measurement results, and improves the accuracy of judgments by improving accuracy, and the communication environment is poor. Even if communication is interrupted or unexpected data deletion is performed, measurement data can be transmitted without re-measurement.

It is sectional drawing which shows the example of the machine component in the state automatic determination system of the machine component which concerns on 1st Embodiment of this invention, a stay, and a sensor unit. It is a block diagram which shows the outline of a conceptual structure of the state automatic determination system. It is a block diagram which shows the specific example of a conceptual structure of the same state automatic determination system. It is a flowchart which shows the flow of a process and an effect | action of the state automatic determination system. It is a block diagram which shows the conceptual structure of the state automatic determination system which concerns on other embodiment of this invention. It is a block diagram which shows the conceptual structure of the state automatic determination system which concerns on further another embodiment of this invention. It is sectional drawing which shows the other example of a mechanical component, a stay, and a sensor unit. It is sectional drawing which shows the further another example of a mechanical component, a stay, and a sensor unit. It is a front view which shows the auxiliary machine installation part of the commercial vehicle which is an apparatus equipped with multiple machine parts used as a measuring object. It is a front view which shows the ball screw apparatus which is an example of the other mechanical components used as a measuring object. It is the front view of the constant velocity joint which is an example of the other mechanical components used as a measuring object, and the enlarged view of the stay and sensor unit which are installed in this. (A) is sectional drawing of the stay and sensor unit which are installed in an equivalent speed joint, (B) is a side view which shows the components for attachment of the stay.

A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view showing a coupled state of a mechanical component 1 which is a rolling bearing device and a sensor unit 2, and FIG. 2 is a block diagram showing an outline of a conceptual configuration of a mechanical component state automatic determination system.
In FIG. 1, a stay 3 capable of detachably holding the sensor unit 2 is attached to the machine component 1 in a constantly installed state, and the stay 3 is provided with a unique information storage means 4.

  As shown in FIG. 2, the state automatic determination system includes the mechanical component 1, the sensor unit 2, and a processing system 5. The sensor unit 2 includes a state detection sensor 6 that measures a state quantity or the like of the mechanical component 1, a reading device 7 that reads unique information from the unique information storage unit 4, and a storage device 28. The processing system 5 is a device for processing the information obtained by the sensor unit 2, and information for determination such as a predetermined processing method and determination criteria used for determining the state of the machine part 1 from the unique information read by the reading device 7. The selected information for determination is used to determine a predetermined state such as abnormality determination of the machine part 1 from the measurement data output from the state detection sensor 6. The processing system 5 is wirelessly connected to a plurality of sensor units 2 and can process information of each sensor unit 2. The processing system 5 may be composed of a single information processing device such as a computer. In this example, the processing system 5 is composed of an information terminal 8 and a data server 9 as shown in FIG.

In FIG. 1, the machine component 1 is a rolling bearing device in this example as described above. Specifically, a pulley 11 in an automobile auxiliary machine is rotatably supported on a fixed shaft 13 via a rolling bearing 12. It consists of a device. The rolling bearing 12 rotates the outer ring, and the pulley 11 is fitted to the outer peripheral surface of the outer ring 12b that is the rotating side wheel. In this example, the rolling bearing 12 is a sealed ball bearing, and includes a rolling element 12c formed of a ball between the inner ring 12a and the outer ring 12b, and seals 12d positioned at both ends of the both race rings 12a and 12b. Yes. A component 14 that is a movable part such as an end surface cover that covers the end surface of the rolling bearing 12 is attached to the pulley 11. The stay 3 is fixed to the outer surface of the component 14, and the center of the holding portion 3 a that holds the sensor unit 2 is located on the rotation center O of the rolling bearing 12.

The stay 3 has an outer shape including a short cylindrical seat portion 3b whose back side surface is joined to the component 14 and a shaft-like holding portion 3a protruding from the center of the front side surface of the seat portion 3b. . The cross-sectional shape of the stay 3 may be any of a hollow shaft type, a semi-hollow shaft type, and a hollow non-type. The material of the stay 3 may be a synthetic resin or a metal. The stay 3 and the component 14 may be joined by any joining form such as a screw, an adhesive, magnetism, welding, and a ring.
In the illustrated example, the holding portion 3a is such that the bottom surface 15b of the case 15 of the sensor unit 2 is in contact with the seat portion 3b of the stay 3, and the holding portion 3a is press-fitted into the mounting hole 16 provided in the bottom surface, or a screw, The sensor unit 2 is positioned and held by fitting with magnetism or the like.

Note that the stay 3 may be a stay integrally formed with the measurement target mechanical part 1 or the component part 14 when it is difficult to attach the mechanical part 1 to the measurement position.
Moreover, the machine component 1 of FIG. 1 is comprised with the pulley of each belt apparatus 72 of the auxiliary machine provided in the motor vehicle, specifically the commercial vehicle 71 shown in FIG.

  In addition to the example of FIG. 1, the mechanical component 1 may be a bearing device in which a rolling bearing 12 for rotating an inner ring is installed in a housing 61 and supports a rotating shaft 62 as shown in FIG. The stay 3 is attached to the end surface of the inner ring 12a. Also in this case, the stay 3 is attached so that the center of the holding portion 3a of the stay 3 coincides with the rotation center of the bearing 12.

  Further, the mechanical component 1 may be a rolling bearing device in which a pulley 64 is provided on a fixed shaft 63 as shown in FIG. 8 via a fitting component 65 and a rolling bearing 12 for rotating an outer ring. In this case, the stay 3 is attached to the male screw portion 63a provided at the end of the fixed shaft 63 by being screwed with the female screw portion. The sensor unit 2 is attached to the stay 3 by screwing a male screw portion 15 a provided in the case 15 of the sensor unit 2 into a female screw portion provided concentrically with the shaft 63 in the stay 3.

  In FIG. 1, the unique information storage means 4 is means for storing unique information unique to the machine part 1, and is composed of 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 machine part 1, but may be basic information such as a model number or serial number of the stay 3 itself, and may include an installation location, a use start date, and a type of the machine part 1. In addition, internal specifications, use conditions thereof, and the like may be included.

  In addition to the state detection sensor 6, the reading device 7, and the storage device 28, the sensor unit 2 includes a wireless communication device 18 that is a communication device that communicates with the processing system 5, a battery 19, and an A / D converter (see FIG. Not shown). The state detection sensor 6 is a sensor that detects the state quantity of the machine component 1 and may be one. In this example, as shown in FIG. 2, a plurality of acceleration sensors 6a that measure vibration, for example, and rotation A gyro sensor 6b that performs detection is provided. In addition to this, the state detection sensor 6 may include a rotation sensor or a temperature sensor (not shown).

In this embodiment, the state detection sensor 6 is an analog output sensor, and the measurement data is digitally converted by the A / D converter and output wirelessly. Note that the sensor unit 2 may output measurement data as analog data in a wired manner and perform A / D conversion with the information terminal 8 (FIG. 3). A sensor that outputs a digital signal may be used as the state detection sensor 6.
When the sensor unit 2 is installed on the movable part of the mechanical component 1 to be measured, it may be transmitted to the information terminal 8 by wire using a slip ring (not shown). The battery 19 may be a battery type or a charging type.

  The reading device 7 is a device that reads the contents stored in the unique information storage means 4 provided in the stay 3 in a non-contact manner or in contact with the unique information storage means 4, and the sensor unit 2 detects the state in the stay 3. The unique information storage means 4 is provided so as to be readable while being held in a state where it is possible. The reader 7 uses a tag reader when the unique information storage means 4 is an RFID, and uses a barcode reader when the unique information storage means 4 is a one-dimensional or two-dimensional barcode. The communication device 18 attaches identification data of the sensor unit 2 to the processing system 5 and transmits the read unique information together with the measurement data. The communication device 18 may be a device that can perform wireless communication at a very short distance.

  The storage device 28 temporarily stores measurement data measured by the state detection sensor 6 when data communication is interrupted during data transfer when data communication is performed with the information terminal 8 via the communication device 18. It is a means to memorize as a backup. In the storage device 28, the measurement data may be stored together with the unique information. The term “temporarily” may be until the communication of the measurement data is completed and it is confirmed that the communication is correctly performed, and the communication between the sensor unit 2 and the processing system 5 is completed. However, although it may be until it is confirmed that the communication is correctly performed, it is excluded that storing a large number of past data for later comparison processing or the like. The storage device 28 may be, for example, an SD card, another semiconductor storage medium, or a hard disk device, and may have a simple configuration. When the sensor unit 2 includes the storage device 28, the communication device 18 may transmit information stored in the storage device 28 as the measurement data and unique information.

  In FIG. 3, the information terminal 8 receives measurement data and unique information from the sensor unit 2, accesses the communication network 51, and transmits the measurement data and unique information to the data server 9. The information terminal 8 includes a communication device 21 that can receive data from the sensor unit 2 wirelessly or by wire, and is connected to a communication network 51 such as the Internet by another communication processing unit 21A. The communication processing unit 21A may be a unit that communicates wirelessly. The information terminal 8 displays related data on the screen of the display device 23 such as a liquid crystal display device via the terminal-side processing means 22 configured by dedicated software. The communication processing unit 21A accesses, for example, the data server 9, obtains the unique information, the past measurement data, the state determination result, and the like of the machine part 1 to be measured, and can check it on the screen of the display device 23. The communication network 51 is a computer communication network such as the Internet, for example, and the related information can be browsed by a Web browser or the like.

  The terminal-side processing means 22 is configured by dedicated software and has a function of controlling information communication with the sensor unit 2 and the data server 9, data display, and the like. The dedicated software constituting the terminal side processing means 22 is downloaded and installed from the data server 9, or a portable storage medium such as a CD or a DVD, or the data server 9 other than the data server 9 on the Internet constituting the communication network 51. Obtained from homepage, app site, etc. and installed. The OS (operation program) 24 of the information terminal 8 has such a function that can be downloaded and installed. On the screen of the display device 23, the terminal-side processing means 22 includes, as the related information, for example, unique information of the stay 3, measurement data of the sensor unit 2, state determination results and analysis results transmitted from the data server 9, etc. Is displayed.

  In addition, the information terminal 8 has re-transfer instruction means 29. The re-transfer instruction means 29 checks whether or not the measurement data transmitted from the sensor unit 3 is defective in communication, and if there is a defect, instructs the sensor unit 2 to re-transmit the measurement data. Do. The re-transfer instruction means 29 may be configured as a part of the communication device 21 or may be configured independently of the communication device 21 so as to instruct the re-transfer via the communication device 21. Also good. In any case, the retransfer instruction means 29 is constituted by the dedicated software. The sensor unit 2 is provided with a function of transferring the measurement data stored in the storage device 28 again in accordance with the instruction from the retransfer instruction means 29 in the communication device 21 or the like.

  In addition to the above, the information terminal 8 includes an input unit 25 such as a touch panel for input by an operator, and an information storage unit 26 for storing the measurement data and unique information, the state determination result, the analysis result, and the like.

The data server 9 includes an information storage unit 31, a specification database 32, a state determination unit 33, a data analysis unit 34, a processing data storage unit 35, and a communication processing unit 36.
In brief, the data server 9 receives data from the information terminal 8 by the communication processing unit 36, stores state data in the information storage unit 31, and stores bearings, peripheral components, and vehicles stored in the specification database 32. The measurement site is determined from information or the like. Using the information storage unit 31 and / or the specification database 32, signal processing conditions and determination information suitable for the machine part 1 to be measured are determined and analyzed by the data analysis unit 34. The analysis result is stored in the processing data storage unit 35, and the determination information can be set or updated using the accumulated data for each part. The state determination unit 33 determines the state by comparing the analysis result with the determination information and past data. In addition, the state determination unit 33 estimates an abnormality occurrence site using information on bearings and peripheral parts in the specification database 32 and analysis results. The analysis result and the abnormality determination result are transferred to the information terminal 8 of the transmission source.

  The information storage unit 31 also stores the state measurement data, determination results, data analysis results, and the like of each machine component 1 that has performed state measurement, the component history, the result output format, and the like. The information storage unit 31 may store measurement conditions, analysis conditions, and the like based on unique information.

  The specification database 32 stores specifications of the machine part 1, for example, bearing specifications. The specification database 32 may store specifications of peripheral parts, specifications of a part equipped with a bearing that is the target machine part 1, and the like. In addition, a determination method for determining a state according to the type of the machine component 1, determination information such as a threshold value, or the like is stored in either the specification database 32 or the information storage unit 31.

The data analysis unit 34 performs signal processing of the measurement data and frequency analysis to make a signal that can easily determine the state such as abnormality determination. In this frequency analysis, in addition to vibration data, measured rotational speed data may be used.
The state determination unit 33 determines whether there is an abnormality in the mechanical component 1 by comparing the analysis result of the data analysis unit 34 with past data or predetermined determination information.
The processing data storage unit 35 stores the analysis result performed by the data analysis unit 34 and the result of the state determination performed by the state determination unit 33 as a history for each mechanical component 1.

The display terminal 52 is an information terminal having a display function and a communication function. The display terminal 52 can access the data server 9 and browse specific information, past measurement data, state determination results, and the like of the machine part 1 to be measured. For example, information of the data server 9 can be received from the communication processing unit 36 in the data server 9 via the communication network 51 and displayed. In this case, the communication processing unit 36 may perform access restriction with a registered display terminal 52 having authority, a password, or the like.
The communication processing unit 36 of the data server 9 basically transmits and displays the result of the state determination to the information terminal 8 that has transmitted the measurement data, but is registered in addition to the information terminal 8 that has transmitted the measurement data. It has a function of transmitting the result of state processing to the display terminal 52 having an address or the like. The display terminal 52 having the registered address or the like is, for example, a terminal of a predetermined business division of a bearing manufacturer.

FIG. 4 is a flowchart showing the processing and operation performed by this state automatic determination system. When the sensor unit 2 is attached to the stay 3 and the power of the sensor unit 2 is turned on, a calling signal (radio wave or the like) of unique information is transmitted from the sensor unit 2 to the stay 3, and the signal is incorporated in the stay 3. The unique information storage means 4 composed of the IC tag reacts to transmit the unique information to the sensor unit 2. The state detection sensor 6 incorporated in the sensor unit 2 measures the state quantity of the machine part 1 and transmits the measurement data to the information terminal 8 together with the specific information.
Measurement data measured by the state detection sensor 6 is stored in the storage device 28. When the measurement data is transmitted to the information terminal 8 together with the specific information, the communication device 18 may transmit the measurement data stored in the storage device 28, or may be in a state without the storage device 28. You may make it transmit directly from the detection sensor 6. FIG.

After receiving the measurement data and the unique information transmitted from the sensor unit 2, the information terminal 8 uses the re-transfer instruction means 29 to determine whether the measurement data or both the measurement data and the unique information has been normally received. If the data is not received normally, the re-transfer instruction means 29 instructs the sensor unit 2 to retransmit the measurement data. In response to this instruction, the sensor unit 2 transmits the measurement data stored in the storage device 28 to the information terminal 8 again.
When it is confirmed that the measurement data has been successfully received, the information terminal 8 is connected to the data server 9 via the communication network 51, and receives the measurement data and the specific information received from the sensor unit 2 as data. Send to server 9. The data server 9 receives the measurement data and the unique information from the information terminal 8 via the communication network 51, and the information storage unit 31 and the specification database 32 in the data server 9 are used to measure the machine to be measured from the unique information. Information on the component 1 (determination information, component history, past measurement data, etc.) is extracted, and the data analysis unit 34 processes the measurement data. The state determination unit 33 makes a determination by comparing the analysis result of the data analysis unit 34 with the extracted past data or information for determination set in advance from bearing specifications and the like. The display signal of “abnormal” and the result data of the state determination are transmitted, and the user is contacted by telephone, e-mail, SNS or the like. Further, when there is no abnormality, a display signal of “no abnormality” and result data are transmitted to the display terminal 52.

According to the machine part state automatic determination system having this configuration, the following advantages can be obtained.
The machine part 1 has the unique information storage means 4, and the sensor unit 2 has the state detection sensor 6 and the reading device 7 that reads the unique information. Therefore, the machine part 1 can be automatically identified from the unique information read by the sensor unit 2, and even if this state automatic determination system is used for a plurality of machine parts 1, an input operation for identifying the machine part 1 is unnecessary. And eradicating input mistakes. For example, as described above, the sensor unit 2 is attached to a desired machine part 1 to be measured, and a measurement start command is given by a switch or the like, and the machine part 1 to be measured is automatically input without any input operation. It is possible to select the information for determination corresponding to the above and appropriately perform the determination regarding the determined state such as the abnormality determination.
Since the sensor unit 2 is detachably attached to the machine part 1, unlike the conventional device that simply presses the probe, the reproducibility of the measurement result and the accuracy of the determination can be improved by improving the accuracy. Further, the sensor unit 2 may be attached to the machine part 1 only when measurement is necessary, and the use of the machine part 1 is not hindered.
Since the sensor unit 2 has the storage device 28, even if communication between the sensor unit 2 and the information terminal 8 is interrupted in the middle when the communication environment is bad, the data is not lost in the storage device 28. The stored measurement data can be retransmitted. Further, even when the measurement data is deleted due to an operation error or the like in the information terminal 8, the measurement data can be retransmitted.

・ Especially when the stay 3 is permanently installed, the following advantages are obtained. The mounting position of the sensor unit 2 is stable, and variations in measurement data due to mounting errors can be suppressed, and preparation for measurement can be performed in a short time.
・ Even if the sensor cannot be attached to the fixed part of the vehicle bearing and its peripheral parts, which are the machine parts 1 to be measured, by providing the stay 3, the movable parts of the vehicle bearing and its peripheral parts can be measured. The sensor unit 2 having a sensor capable of measuring the state of can be mounted. Even when the sensor unit 2 is installed on the movable part, the measurement at the center of the movable part makes it difficult to be affected by disturbances and enables highly accurate measurement.
-By installing the identification information device in the stay 3, it becomes easy to grasp the measurement object, preparation for measurement can be performed in a short time, and data accumulation and past data retrieval are facilitated.
-By specifying the part to be measured, it is possible to set a threshold for abnormality determination 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.
The information terminal 8 can handle from measurement setup to browsing of diagnosis results. The information terminal 8 may be a portable type such as a smartphone, and can be operated near the mechanical component 1 to be measured.

FIG. 5 shows another embodiment of the present invention. In the embodiment shown in FIGS. 1 to 4, data analysis and state determination are performed by the data server 9, but in the example of FIG. 5, data analysis and state determination are performed by the information terminal (information / display terminal) 8A. The information terminal 8A is an information / display terminal having an information display function.
Specifically, the processing system 5 includes the information terminal 8A and a data server 9 connected to the information terminal 8A via a communication network 51. The information terminal 8A receives the measurement data and the data from the sensor unit 2. It has a communication processing unit 21A that obtains unique information and transmits the unique information to the data server 9, a data analysis unit 44, and a state determination unit 43. The data server 9 automatically stores the machine part 1 according to the specification database 32 storing the machine part specification information corresponding to the unique information, and the machine information 1 is transmitted from the information terminal 8. A communication processing unit 36 that performs selection and transmits the information to the information terminal 8A. The data analysis unit 44 and the state determination unit 43 of the information terminal 8A use the specification information transmitted from the data server 9. Then, analysis and determination of the state are performed based on the measurement data obtained from the sensor unit 2, respectively.

Even if information terminals in recent years are portable terminals such as personal computers, smartphones, tablets, etc., the arithmetic processing function has been dramatically improved, and state determination processing such as abnormality determination with sufficient accuracy and processing speed Can be done. However, information for determination, such as information for determination and past data,
When used for a plurality of machine parts 1, the amount of data becomes enormous, and it is difficult to store in the information terminal 8A at hand and is wasteful. Therefore, as described above, the determination information is stored in the data server 9 and transmitted from the data server 9 to the information terminal 8A, that is, the data server 9 is simply used as a database, and the information terminal 8A determines its state. By performing only the above processing, it is possible to effectively use the advanced processing function of the information terminal 8 and perform state determination while reducing the burden on the data server 9 and the usage cost of the data server 9.

Also in this embodiment, the data server 9 includes an information storage unit 31 that stores the result of data analysis and state determination for the machine part 1 as history information of the machine part 1, and the data server 9 The function of determining the state using the history information of the mechanical component 1 is provided.
Even if it is normal by performing state determination such as abnormality determination with determination information determined from machine part specifications for each type of mechanical part 1, it may become abnormal if it is determined using past determination information about the individual. is there. Therefore, by performing state determination based on history information in addition to state determination by type, and performing comprehensive determination from the results of both determinations, the accuracy of determination such as abnormality determination is improved.
Other configurations and effects are the same as those of the first embodiment shown in FIGS. 1 to 4, such that the storage unit 28 is provided in the sensor unit 2 and the retransmission instruction means 29 is provided in the information terminal 8. is there.
The data server 9 has a function of performing the data analysis and the determination of the state as in the embodiments of FIGS. 1 to 4, and the information terminal 8 performs the data analysis and the state according to setting conditions. It may have a function of switching whether to perform the determination at the information terminal 8 or the data server 9.

FIG. 6 shows still another embodiment of the present invention. This embodiment uses the stay 3 having the unique information storage means 4 for a plurality of machine parts 1 in the embodiment shown in FIGS. 1 state determination is performed simultaneously by parallel processing.
Other matters such as the storage unit 28 provided in the sensor unit 2 and the retransmission instruction means 29 provided in the information terminal 8 are the same as those in the first embodiment shown in FIGS. .

Note that the mechanical component 1 to be determined by the state automatic determination system is, for example, the vehicle bearing described with reference to FIG. 9 and 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.

The machine part 1 to be judged is not limited to the bearing and its peripheral parts, but the invention state automatic judgment system is effectively exhibited in various machine parts, particularly the machine part 1 having rolling elements. Examples of the mechanical component 1 having rolling elements include a ball screw device shown in FIG. 10 and a constant velocity joint shown in FIGS. 11 and 12.
10 has a rolling element (not shown) that circulates and moves in the nut 82 between the screw shaft 81 and the nut 82. The screw shaft 81 has a bearing 83 interposed therebetween. Supported by a housing (not shown). The stay 3 is fixed to the end of the screw shaft 81, and the sensor unit 2 is detachably attached to the stay 3.

FIG. 11 shows an example in which the present invention is applied to a machine part 1 composed of a constant velocity joint. A stay 3 is provided on a drive shaft 91 interposed between mechanical parts 1 and 1A composed of two constant velocity joints, and the sensor unit 2 is detachably attached to the stay 3. In FIG. 12, the attachment band 92 is fastened and fixed to the outer periphery of the drive shaft 91 or the constant velocity joints 1, 1 </ b> A, and the stay 3 is provided at one place in the circumferential direction of the attachment band 92. As shown in FIGS. 12A and 12B, the sensor unit 2 is detachably attached to the stay 3. The stay 3 and the sensor unit 2 are provided with magnets 93 and 94 facing each other, and the sensor unit 2 can be firmly held by the magnetic attractive force between the magnets 93 and 94. In addition, the stay 3 and the sensor unit 2 may be provided with a male screw and a female screw, and the sensor unit 2 may be held by screwing each other.

1: Mechanical part 2: Sensor unit 3: Stay 4: Specific information storage means 5: Processing system 6: State detection sensor 6a: Acceleration sensor 6b: Gyro sensor 7: Reading device 8: Information terminal 9: Data server 21, 21A: Communication device 28: Storage device 29: Retransfer instruction means 31: Information storage unit 32: Specification database 33: State determination unit 34: Data analysis unit 35: Data storage unit 36: Communication processing unit 51: Communication network 52.

Claims (13)

Unique information storage means provided on the machine part and indicating the unique information of the machine part;
A state detection sensor that is detachable from the machine part and measures the state of the machine part, a reading device that reads the unique information from the unique information storage means, and a storage device that stores measurement data detected by the state detection sensor; And a sensor unit having a communication device for transmitting the measurement data and the unique information;
The measurement data output from the state detection sensor is selected from the specific information read by the reading device of the sensor unit, and the predetermined determination information used for determining the state of the machine part is selected. And a processing system that performs a determination on a predetermined state of the machine part,
The processing system includes re-transfer instruction means for instructing the sensor unit to re-transmit the measurement data when the measurement data has a defect in communication.
A system for automatically judging the state of machine parts.   2. The automatic state determination system for machine parts according to claim 1, wherein the storage device of the sensor unit is an SD card, another semiconductor storage medium, or a hard disk device.   3. The automatic state determination system for machine parts according to claim 1, wherein the sensor unit includes an acceleration sensor, a rotation sensor, or a gyro sensor as the state detection sensor.   4. The automatic state determination system for a machine part according to claim 1, wherein the sensor unit includes a wireless communication device as the communication device. 5.   5. The machine part state automatic determination system according to claim 1, wherein the processing system includes an information terminal and a data server connected to the information terminal through a communication network. Obtains the measurement data and the unique information from the sensor unit and transmits them to the data server, and the data server has a specification database that stores specification information of mechanical parts corresponding to the unique information, A machine that automatically identifies the machine part and selects the specification information based on the specific information transmitted from the information terminal, and performs the data analysis and the state determination based on the measurement data using the selected specification information. Automatic component status judgment system.   5. The machine part state automatic determination system according to claim 1, wherein the processing system includes an information terminal and a data server connected to the information terminal via a communication network, and the information terminal is connected to the sensor unit. A communication processing unit that obtains the measurement data and the unique information and transmits the unique information to the data server, a data analysis unit, and a state determination unit. The data server corresponds to the unique information. A specification database storing specification information of a machine part, and a communication processing unit that automatically identifies the machine part and selects the specification information based on the unique information transmitted from the information terminal and transmits the specification information to the information terminal. The data analysis unit and the state determination unit of the information terminal use the specification information transmitted from the data server, and The analyzes and determination of the state by the measurement data each of mechanical parts condition automatic determination system.   6. The automatic state determination system for a machine part according to claim 5, wherein the data server displays state data obtained by measuring the state of the machine part, analysis result, result of state determination, measurement condition, part history, etc. An automatic state determination system for a machine component having an information storage unit for storing history information, wherein the data server has a function of performing the state determination using information on the history of the machine component.   7. The automatic state determination system for a machine part according to claim 6, wherein the data server stores a result of data analysis and state determination for the machine part at the information terminal as history information of the machine part. And the state determination unit and the data analysis unit of the information terminal have a function of performing the analysis and the state determination using the history information of the machine part, respectively.   9. The automatic state determination system for machine parts according to claim 6, wherein the data server transmits the determination result to a registered terminal different from the information terminal that transmits the measurement data. An automatic state determination system for a machine part having a processing unit.   The state automatic determination system for machine parts according to any one of claims 6 to 9, wherein the information terminal is a general-purpose information terminal, which communicates with the sensor unit, communicates with the data server, And a machine part state automatic determination system comprising an operation system having a function of installing dedicated software for performing processing related to the state of the machine part.   The automatic state determination system for a machine part according to any one of claims 1 to 10, wherein the machine part automatic state determination system includes a rolling element.   12. The automatic state determination system for a machine part according to claim 1, wherein the machine part has a stay that detachably holds the sensor unit, and the unique information storage means is the device. A system for automatically determining the state of machine parts installed in a stay.   6. The automatic state determination system for a machine part according to claim 5, wherein the data server has a function of performing the data analysis and the determination of the state, and the information terminal is configured to perform the data analysis and the determination according to a setting condition. An automatic state determination system for a machine part having a function of switching whether to determine a state by an information terminal or a data server.

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