JP7480655B2 - System, method, and program for diagnosing abnormalities in a moving object - Google Patents

Description

The present invention relates to an abnormality diagnosis system, an abnormality diagnosis method, and a program for a moving object.

Conventionally, when mechanical damage occurs in equipment components such as bearings, vibrations and noise increase as the damage expands, and even broken pieces can become lodged and lock rotation. To avoid such incidents, it is necessary to detect and deal with damage while it is still minor.

For example, Patent Document 1 discloses an abnormality diagnosis system for railway vehicles that detects and reports abnormalities in the vehicle based on detection signals from a sensor unit attached to the railway vehicle.

JP 2012-100434 A

In the configuration of Patent Document 1, diagnostic thresholds are set according to events that need to be avoided. However, Patent Document 1 does not take into account the individual differences between the parts to be detected. Therefore, when setting a common threshold for products of the same model during mass production, it is necessary to set the threshold based on large amounts of data and statistical work. This increases the burden of verification and other tasks required to set appropriate thresholds for parts.

In view of the above problems, the present invention aims to make it possible to prevent component failures while reducing the effort required for setting up the diagnostics used in diagnosing abnormalities in components of a moving body.

In order to solve the above problem, the present invention has the following configuration. That is, an abnormality diagnosis system for components constituting a moving body includes a status sensor that acquires status information of the components constituting the moving body, a position sensor that acquires position information of the moving body, a setting unit that sets an initial value for the status information of the components and a threshold value for the amount of change from the initial value based on the status information of the components when the moving body is located in a specified section, and a diagnosis unit that performs an abnormality diagnosis of the components based on whether or not the difference between the initial value and the status information acquired by the status sensor exceeds the specified threshold value when it is detected that the moving body is located in the specified section based on the position information acquired by the position sensor.

Another aspect of the present invention has the following configuration. That is, a method for diagnosing an abnormality in a component part constituting a moving body includes a step of acquiring status information of the component part, a step of acquiring position information of the moving body, a step of setting an initial value for the status information of the component part and a threshold value for the amount of change from the initial value based on the status information of the component part when the moving body is located in a predetermined section, and a step of diagnosing an abnormality in the component part based on whether or not the difference between the initial value and the status information of the component part exceeds the predetermined threshold value when it is detected that the moving body is located in the predetermined section based on the position information.

Another aspect of the present invention has the following configuration. That is, the program causes a computer to execute the steps of acquiring status information of components constituting a moving body, acquiring position information of the moving body, setting an initial value for the status information of the components and a threshold value for the amount of change from the initial value based on the status information of the components when the moving body is located in a specified section, and diagnosing an abnormality in the components based on whether the difference between the initial value and the status information of the components exceeds the specified threshold value when it is detected that the moving body is located in the specified section based on the position information.

The present invention makes it possible to prevent component failures while reducing the effort required for setting up the diagnostics used in diagnosing abnormalities in moving body components.

1 is a diagram showing an example of the overall configuration of a system according to a first embodiment; FIG. 4 is a diagram showing an outline of a flow of abnormality diagnosis according to the first embodiment. 5 is a flowchart of a process for setting an initial value used in abnormality diagnosis according to the first embodiment. 4 is a flowchart of a diagnosis process according to the first embodiment. FIG. 13 is a diagram showing an example of the overall configuration of a system according to a second embodiment. FIG. 13 is a diagram showing an example of a functional configuration of a vehicle according to a third embodiment.

The following describes the embodiment of the present invention with reference to the drawings. Note that the embodiment described below is one embodiment for explaining the present invention, and is not intended to be interpreted as limiting the present invention, and not all of the configurations described in each embodiment are necessarily essential configurations for solving the problems of the present invention. In addition, in each drawing, the same components are given the same reference numbers to indicate their correspondence.

First Embodiment
A first embodiment of the present invention will be described below. The present invention is applicable to a moving body that can move by running, etc. Examples of such moving bodies include, but are not limited to, vehicles such as four-wheeled vehicles and two-wheeled vehicles, and railroad cars.

[overall structure]
FIG. 1 is a diagram showing an example of the overall configuration of a moving body equipped with an abnormality diagnosis system according to the present embodiment. Here, a vehicle capable of moving by running will be described as an example of a moving body. The vehicle 1 includes a sensor unit 10, a component 20 that is a target of abnormality diagnosis according to the present embodiment, and a diagnosis unit 30. The component 20 is assumed to be a bearing, but is not limited thereto. For example, brake pads and clutches, which are consumable parts, may be treated as the component 20. Note that the vehicle 1 is assumed to include parts related to running, including the component 20, but for simplicity of description, description of parts other than the component 20 will be omitted here.

The sensor unit 10 includes a position sensor 11 and a vibration sensor 12. The position sensor 11 is a sensor for detecting the current position of the vehicle 1. As the position sensor 11, a global navigation satellite system (GNSS) using a positioning satellite such as a global positioning system (GPS) may be used. Alternatively, the position sensor 11 may be a sensor configured to acquire position information of a moving body via a communication device installed in the vicinity. In addition, in the GNSS device, multiple positioning satellites may be used to specify the position with high accuracy. The position information may include, for example, information on latitude, longitude, and altitude. The vibration sensor 12 is, for example, an acceleration sensor, and is a sensor for detecting vibrations occurring inside the vehicle 1 (more specifically, the component 20). It is desirable to install the vibration sensor 12 in the vicinity of the component 20 in order to improve the accuracy in detecting the state of the component 20. The distance and positional relationship between the component 20 and the vibration sensor 12 here may be determined according to the structure of the component 20, the accuracy of the vibration sensor 12, etc.

Note that while FIG. 1 shows only one vibration sensor 12 and one component 20, this configuration is not limiting. For example, multiple vibration sensors 12 may be provided depending on the structure of the component 20 to be diagnosed and the structure of the vehicle 1. Furthermore, among the parts that make up the vehicle 1, multiple parts may be the component 20 to be diagnosed.

The diagnosis unit 30 includes a position information acquisition unit 31, a vibration information acquisition unit 32, a diagnosis processing unit 33, a parameter setting unit 34, a memory unit 35, and a notification processing unit 36. The position information acquisition unit 31 acquires position information of the vehicle 1 detected by the position sensor 11. The acquisition of the position information may be performed at predetermined intervals, or may be started when it is detected that the vehicle 1 is moving. The vibration information acquisition unit 32 acquires vibration information generated by the vehicle 1 detected by the vibration sensor 12. The acquisition of the vibration information may be performed, for example, when it is detected that the vehicle 1 is moving.

The diagnostic processing unit 33 executes the diagnostic processing according to this embodiment. Details of the diagnostic processing according to this embodiment will be described later. The parameter setting unit 34 sets various parameters used in the diagnostic processing. Details of the various parameters according to this embodiment will be described later. The memory unit 35 holds and manages various information according to this embodiment (e.g., position information and vibration information). The notification processing unit 36 performs notification processing of the results of the diagnostic processing. The notification method of the notification processing unit 36 is not particularly limited, and may be a visual notification method such as screen output, or an auditory notification method such as audio output.

[Process flow]
2 is a diagram showing an outline of the overall flow of the diagnostic process according to this embodiment. The process according to this embodiment is roughly divided into a setting phase and a diagnostic phase. In the setting phase, various setting values (parameters) used in the diagnostic process are set.

The setting phase includes a diagnostic section setting process S211, an initial value setting process S212, and a threshold setting process S213. In the diagnostic section setting process S211, a position or section (hereinafter referred to as a "diagnosis section") where the diagnostic process described later is performed is set. The diagnostic section may be set at any time by the manufacturer or manager of the vehicle 1 or the component 20, or a position around the vehicle 1 that satisfies a predetermined condition may be automatically set as the diagnostic section. The predetermined condition may be, for example, a position where the vehicle 1 travels regularly, or a position around the vehicle 1 that has traveled a certain amount (or a certain amount of driving of the component 20) since the component 20 was replaced with a new one. Information about the set diagnostic section is stored and managed in the storage unit 35. The diagnostic section may be determined based on map information stored in a navigation system (not shown) provided in the vehicle 1, when the diagnostic unit 30 cooperates with the navigation system.

In the initial value setting process S212, an initial value that serves as a reference value in the diagnosis of the component 20 is set. In this embodiment, the vibration value generated when the new component 20 is operating stably in a normal state is set as the initial value. For example, the manufacturer or manager of the vehicle 1 or the component 20 may set the vibration value obtained from the component 20 at any timing when the vehicle 1 is located in the above diagnosis section as the initial value, or the vibration value generated when the component 20 satisfies a predetermined condition may be automatically set as the initial value. The predetermined condition here may be, for example, the vibration value when the vehicle 1 is located in the above diagnosis section after a certain driving (or a certain driving of the component 20) has been performed after replacing the component 20 with a new one. In other words, it may be the vibration value at the time when the initial operation (so-called break-in operation) for the component 20 is completed. The set initial value is stored and managed in the storage unit 35.

In the threshold setting process S213, a threshold is set for determining that the component 20 is abnormal in the diagnosis of the component 20. The threshold in this embodiment indicates a threshold for the difference (amount of change) from the initial value described above. Specifically, when the difference between the value of the vibration information of the component 20 detected by the vibration sensor 12 and the set initial value exceeds the set threshold, the component 20 is diagnosed as abnormal. The threshold may be set at any time by the manufacturer or manager of the vehicle 1 or the component 20, or may be automatically derived and set based on the relationship with the set initial value. The set threshold is stored and managed in the memory unit 35.

With the above-mentioned configuration, in the setting phase, the diagnosis position, the initial value for the vibration information of the component 20, and the threshold value for the amount of change in the vibration information of the component 20 are associated with and managed for the component 20. When multiple components are to be diagnosed, this information is set for each of the multiple components. In addition, when the component 20 is replaced, for example, the above information is also updated.

The diagnosis phase is performed when the vehicle 1 is located in the diagnosis section based on the position information of the vehicle 1. The diagnosis phase includes a diagnosis start determination process S221, a vibration value derivation process S222, a change amount derivation process S223, an abnormality determination process S224, and a diagnosis result output process S225.

In the diagnosis start determination process S221, the current position information 202 of the vehicle 1 detected by the position sensor 11 is referenced, and if the vehicle 1 is located in the diagnosis section set in the diagnosis section setting process S211, control is performed to start the diagnosis process. In the vibration value derivation process S222, the vibration value generated in the component 20 is derived based on the vibration information 201 detected by the vibration sensor 12. The derivation method here is not particularly limited, but an effective value, average value, moving average value, etc. per a predetermined unit time may be used to suppress the influence of local values and noise. Alternatively, a configuration may be used in which a low pass filter (LFP) or the like is applied to the vibration information 201 to remove noise.

In the change amount derivation process S223, the difference (change amount) between the vibration value derived in the vibration value derivation process S222 and the initial value set in the initial value setting process S212 is derived. In the abnormality determination process S224, based on whether the change amount derived in the change amount derivation process S223 exceeds the threshold value set in the threshold value setting process S213, it is diagnosed whether the component 20 is normal or abnormal. In the diagnosis result output process S225, the determination result by the abnormality determination process S224 is output as the diagnosis result 203.

[Processing flow]
(Setting process)
3 is a flowchart showing a setting process by the parameter setting unit 34 of the diagnosis unit 30 according to the present embodiment. This process may be realized, for example, by a central processing unit (CPU) or an electronic control unit (ECU) of the vehicle 1 reading out a program for implementing each part shown in FIG. 1 from a storage device such as a hard disk drive (HDD) or a read only memory (ROM) and executing the program. This process corresponds to the setting phase shown in FIG. 2. As described above, the various parameters used in the diagnosis of the component 20 according to the present embodiment may be set at any timing by the manufacturer or manager of the component 20 or the vehicle 1, or any value may be automatically set at a timing that satisfies a predetermined condition. Here, an example of a process flow in the case where the parameters are automatically set on the system side will be described.

In S301, the parameter setting unit 34 starts monitoring the drive state of the component 20. Note that monitoring of the drive state of the component 20 may be started when a signal indicating that the vehicle 1 has started moving is detected, or may be started when the vibration sensor 12 detects vibration of the component 20.

At S302, the parameter setting unit 34 starts monitoring the driving route of the vehicle 1. As described above, the position sensor 11 can acquire the position information of the vehicle 1, and therefore the driving route can be identified by periodically acquiring this information. The acquired position information may be stored in the memory unit 35 as a driving history as appropriate.

In S303, the parameter setting unit 34 determines whether or not the setting of the initial values and thresholds for the component 20 has been completed. For example, if the component 20 has been newly replaced, the initial values and thresholds may be initialized, in which case it is determined that the setting is incomplete. If the setting of the initial values and thresholds has been completed (YES in S303), the processing of the parameter setting unit 34 proceeds to S309. On the other hand, if the setting of the initial values and thresholds has not been completed (NO in S303), the processing of the parameter setting unit 34 proceeds to S304.

In S304, the parameter setting unit 34 determines whether the drive time of the component 20 is equal to or longer than a predetermined time. The predetermined time here is a threshold value for the drive time for the break-in operation of the component 20, and may be set to any value. This predetermined time may be set in advance and stored in the memory unit 35 or the like. If the break-in operation is not necessary, the predetermined time here may be set to a relatively short time until the component 20 operates stably. The drive time may be calculated based on the accumulated time from the start of monitoring the drive state in S301. If the drive time is equal to or longer than the predetermined time (YES in S304), the processing of the parameter setting unit 34 proceeds to S305. On the other hand, if the drive time is less than the predetermined time (NO in S304), the processing of the parameter setting unit 34 proceeds to S309.

At S305, the parameter setting unit 34 acquires vibration information of the component 20 via the vibration sensor 12. The vibration information here may be vibration information at a predefined time interval.

In S306, the parameter setting unit 34 derives a vibration value of the component 20 based on the vibration information acquired in S305. As described above, the effective value, average value, moving average value, etc. per predetermined unit time may be used using the vibration information acquired in S305. Alternatively, the vibration value may be derived by applying an LFP (Low Pass Filter), etc. In this embodiment, the vibration value derived here is treated as the initial value of the component 20.

In S307, the parameter setting unit 34 derives a threshold value based on the initial value derived in S306. For example, the threshold value may be determined from the vibration amplitude indicated in the vibration information used to derive the initial value in S306. Alternatively, a predetermined ratio or increase/decrease value (fixed value) relative to the initial value may be defined and applied to determine the threshold value. Note that the method of deriving the threshold value is not particularly limited, and other methods may be applied.

In S308, the parameter setting unit 34 stores the initial value derived in S306 and the threshold value derived in S307 in the memory unit 35.

In S309, the parameter setting unit 34 determines whether or not a diagnostic interval has been set. That is, the parameter setting unit 34 determines whether or not a diagnostic interval for performing a diagnosis using the set initial value and threshold value has already been set. If a diagnostic interval has been set (YES in S309), the processing of the parameter setting unit 34 proceeds to S312. If a diagnostic interval has not been set (NO in S309), the processing of the parameter setting unit 34 proceeds to S310.

At S310, the parameter setting unit 34 determines whether a position that satisfies a predetermined condition has been detected based on the travel route of the monitored vehicle 1. A position that satisfies a predetermined condition may be a position that has been traveled to a certain number of times or more within a predetermined time interval, or a position where the vehicle 1 is frequently located (for example, a parking lot or around a station). In this embodiment, the diagnosis section is set to include the position where the vibration information used when the initial value and threshold value were derived was obtained. In other words, in this embodiment, the initial value and threshold value are set based on the vibration information obtained within the diagnosis section.

In S311, the parameter setting unit 34 sets a predetermined range as a diagnosis section based on the position detected in S310. In other words, the parameter setting unit 34 may determine the diagnosis section based on the movement history of a moving body such as the vehicle 1. At this time, the diagnosis section may be determined further using map information held by a navigation system (not shown) equipped in the vehicle 1. Then, the parameter setting unit 34 stores the set diagnosis section in the memory unit 35.

In S312, the parameter setting unit 34 determines whether the setting of the initial values, thresholds, and diagnostic intervals is complete. If the setting is complete (YES in S312), this processing flow ends. On the other hand, if the setting is not complete (NO in S312), the processing of the parameter setting unit 34 returns to S303 and the subsequent processing is repeated.

The order of setting the initial values and thresholds and setting the diagnostic interval is not limited to the flow shown in Figure 3. Contrary to the flow shown in Figure 3, the initial values and thresholds may be set after determining the diagnostic interval.

(Diagnosis Processing)
4 is a flowchart showing a diagnosis process by the diagnosis processing unit 33 of the diagnosis unit 30 according to this embodiment. This process may be realized, for example, by a CPU or an ECU included in the vehicle 1 reading out a program for implementing each part shown in FIG. 1 from a storage device such as an HDD or a ROM and executing the program. This process flow may be started when movement of the vehicle 1 is detected.

In S401, the diagnosis processing unit 33 acquires location information indicating the current location of the vehicle 1 detected by the position sensor 11. The location information here may be indicated by, for example, latitude, longitude, and altitude.

In S402, the diagnostic processing unit 33 determines whether or not the current position of the vehicle 1 is within a preset diagnosis section based on the position information acquired in S401. As described above, the diagnosis section is set in advance and stored in the memory unit 35. If it is determined that the current position of the vehicle 1 is within the diagnosis section (YES in S402), the processing of the diagnostic processing unit 33 proceeds to S403. On the other hand, if it is determined that the current position of the vehicle 1 is not within the diagnosis section (NO in S402), the processing of the diagnostic processing unit 33 proceeds to S411.

At S403, the diagnostic processing unit 33 acquires vibration information of the vehicle 1 detected by the vibration sensor 12.

In S404, the diagnostic processing unit 33 derives a current vibration value based on the vibration information acquired in S403. The vibration value here may be configured to use an effective value, average value, or moving average value calculated per any unit time from the input signal (vibration information) from the vibration sensor 12 in order to suppress the effects of electrical and mechanical noise, for example. The derivation method here is assumed to be the same as the method used in the processing of S306 in FIG. 3.

In S405, the diagnosis processing unit 33 derives the amount of change based on the current vibration value. The amount of change is derived using the following formula (1).
(Change amount) = (current vibration value) - (initial value) ... (1)

In S406, the diagnostic processing unit 33 determines whether the amount of change derived in S406 is greater than a set threshold. If it is determined that the amount of change is greater than the threshold (YES in S406), the processing of the diagnostic processing unit 33 proceeds to S407. On the other hand, if it is determined that the amount of change is equal to or less than the threshold (NO in S406), the processing of the diagnostic processing unit 33 proceeds to S408.

In S407, the diagnostic processing unit 33 diagnoses that there is an abnormality in the vehicle 1. The processing of the diagnostic processing unit 33 then proceeds to S409.

At S408, the diagnostic processing unit 33 diagnoses that there is no abnormality in the vehicle 1. After that, the processing of the diagnostic processing unit 33 proceeds to S411.

In S409, the diagnosis processing unit 33 notifies the notification processing unit 36 that an abnormality has been detected as a diagnosis result. The notification method here is not particularly limited, but may be, for example, a configuration in which a screen (not shown) for notifying the abnormality is displayed on a display unit (not shown) provided in the vehicle 1, or a configuration in which a notification is sent to a predetermined notification destination provided externally.

In S410, the diagnostic processing unit 33 determines whether or not to continue the diagnosis of the vehicle 1. The criteria for this determination may be, for example, based on an instruction received from an occupant of the vehicle 1 in response to the notification result in S409, or based on whether or not the vehicle 1 is continuing to travel. If it is determined to continue (YES in S410), the processing of the diagnostic processing unit 33 proceeds to S411. On the other hand, if it is determined not to continue (NO in S410), the diagnostic processing unit 33 ends this processing flow.

In S411, the diagnostic processing unit 33 waits for a predefined period of time. This period may be defined by time or by distance traveled. After the certain period has elapsed, the process of the diagnostic processing unit 33 returns to S401 and the subsequent processes are repeated.

In the above process, a configuration in which a threshold value of 1 is set for the amount of change is shown, but the present invention is not limited to this configuration. For example, a configuration in which multiple threshold values are set corresponding to the urgency (degree) of the abnormality, and the urgency of the abnormality is determined by comparing the amount of change with these threshold values, is also possible. In this case, the content of the notification is switched depending on the urgency obtained as a result of the diagnosis.

As described above, this embodiment makes it possible to prevent equipment failures while reducing the effort required for setting up the diagnostics used in diagnosing abnormalities in components of a moving body.

Second Embodiment
In the first embodiment, a configuration has been described in which a diagnosis unit constituting an abnormality diagnosis system is provided inside the vehicle 1. In the second embodiment of the present invention, a configuration will be described in which a diagnosis device functioning as an abnormality diagnosis system is provided outside the vehicle 1 as a moving body. Here, a description of parts that overlap with the first embodiment will be omitted, and the description will focus on the differences.

[overall structure]
5 is a diagram showing an example of the overall configuration of the system according to this embodiment. In this embodiment, a vehicle 40, which is a moving body, and a diagnostic device 50, which functions as an abnormality diagnosis system, are communicatively connected via a network 60. The communication method and communication standard in the network 60 are not particularly limited, and a plurality of networks, such as the Internet and dedicated lines, may be combined.

The vehicle 40 includes a sensor unit 10, components 20, and a communication control unit 41. The communication control unit 41 is a processing unit that controls communication processing with the outside, and transmits various information detected by the sensor unit 10 to the outside (here, the diagnostic device 50).

The diagnostic device 50 includes a position information acquisition unit 31, a vibration information acquisition unit 32, a diagnostic processing unit 33, a parameter setting unit 34, a storage unit 35, a notification processing unit 36, and a communication control unit 51. The communication control unit 51 is a processing unit that controls communication processing with the outside, and receives various information transmitted from the vehicle 40.

The settings of various parameters and the contents of abnormality diagnosis are the same as those in the first embodiment, so detailed explanations will be omitted, but the diagnostic device 50 sets various parameters and performs abnormality diagnosis based on the detection results of various sensors transmitted from the vehicle 40.

As described above, in the configuration according to this embodiment, as in the first embodiment, it is possible to diagnose abnormalities in components using a moving body such as a vehicle. Furthermore, compared to the configuration according to the first embodiment, it is possible to reduce the processing load on the moving body.

Third Embodiment
In the first and second embodiments, a configuration in which a vibration sensor and a component are provided separately has been described. In the third embodiment of the present invention, a configuration in which a vibration sensor is provided inside a component in order to individually detect an abnormality in the component will be described. Here, a description of parts that overlap with the above embodiments will be omitted, and the description will focus on the differences.

[Device configuration]
6 is a diagram showing an example of the overall configuration of a vehicle 70 according to this embodiment. In this embodiment, as in the second embodiment, a configuration in which the vehicle and a diagnostic device are connected via a network will be described as an example.

The vehicle 70 according to this embodiment is configured to include a position sensor 11, a component 71, and a communication control unit 41. The component 71 also includes a vibration sensor 72, the detection result of which is transmitted to the outside (here, the diagnostic device 50) via the communication control unit 41.

The settings of various parameters and the contents of abnormality diagnosis are the same as those in the second embodiment, so detailed explanations will be omitted. However, the diagnostic device 50 sets various parameters and performs abnormality diagnosis based on the detection results of various sensors transmitted from the vehicle 40.

As described above, the configuration according to this embodiment also makes it possible to diagnose abnormalities in components using a moving body such as a vehicle. In addition, compared to the configuration according to the second embodiment, the components themselves are equipped with vibration sensors, making it possible to diagnose abnormalities in individual components with greater accuracy.

<Other embodiments>
In the above embodiment, a configuration has been shown in which vibration information detected by a vibration sensor is used as status information of a component to diagnose the component, but the present invention is not limited to this configuration. For example, a temperature sensor or a sound sensor (microphone) may be used as a status sensor for acquiring status information of the component, instead of a vibration sensor. In this case, diagnosis is performed using temperature information detected by the temperature sensor and sound (noise) information detected by the sound sensor. The type of status sensor is not particularly limited, and other types of sensors may be used depending on the component. Furthermore, multiple types of sensors may be combined depending on the type and structure of the component to be diagnosed, and the detection results of each sensor may be combined to perform diagnosis.

The present invention can also be realized by providing a program or application for implementing the functions of one or more of the above-described embodiments to a system or device via a network or storage medium, and having one or more processors in the computer of the system or device read and execute the program.

It may also be realized by a circuit that realizes one or more functions (for example, an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array)).

The present invention is not limited to the above-described embodiment, and it is intended that the various components of the embodiment may be combined with each other, and that those skilled in the art may modify and apply the invention based on the description in the specification and well-known technology, and this is included in the scope of the protection sought.

As described above, the present specification discloses the following:
(1) a status sensor (e.g., a vibration sensor 12) that acquires status information of components that configure the moving object;
A position sensor (e.g., position sensor 11) for acquiring position information of the moving object;
a setting unit (e.g., a parameter setting unit 34) that sets an initial value for the state information of the component and a threshold value for a change amount from the initial value based on the state information of the component when the moving body is located in a predetermined section;
an abnormality diagnosis system comprising a diagnosis unit (e.g., a diagnosis processing unit 33) that, when it is detected that the moving body is located in the specified section based on the position information acquired by the position sensor, performs an abnormality diagnosis of the component based on whether or not a difference between the initial value and the status information acquired by the status sensor exceeds the specified threshold value.
According to this configuration, in abnormality diagnosis of components of a moving body, it is possible to prevent breakdowns in the components while reducing the effort involved in the setting work used in the abnormality diagnosis.

(2) The abnormality diagnosis system according to (1), wherein the setting unit determines an initial value for a new component based on status information at the time when the new component has been operated for a certain period of time.
According to this configuration, by setting the initial value based on the state information of the state in which stable operation is being performed after the break-in operation for the components is completed, it is possible to set diagnostic criteria for performing diagnosis with higher accuracy.

(3) The abnormality diagnosis system according to (1) or (2), wherein the setting unit determines the threshold value by applying a predetermined ratio or a fixed value to an initial value set for the component.
According to this configuration, it is possible to set an appropriate threshold value for the amount of change in accordance with the set initial value.

(4) The abnormality diagnosis system according to any one of (1) to (3), wherein the setting unit sets a plurality of threshold values according to the urgency of the abnormality of the component.
According to this configuration, multiple thresholds can be set according to the degree of urgency, enabling step-by-step abnormality diagnosis.

(5) The abnormality diagnosis system according to any one of (1) to (4), wherein the setting unit sets the predetermined section based on a movement history of the moving object.
According to this configuration, it is possible to set any position as the diagnosis section based on the movement history of the moving object.

(6) The abnormality diagnosis system according to any one of (1) to (5), further comprising a notification unit (e.g., notification processing unit 36) that notifies the result of diagnosis by the diagnosis unit.
According to this configuration, it is possible to give an appropriate notification depending on the result of the abnormality diagnosis.

(7) The abnormality diagnosis system according to any one of (1) to (6), wherein the condition sensor is a vibration sensor that acquires vibration information of the component.
This configuration enables abnormality diagnosis according to changes in vibration information obtained from the component parts.

(8) The abnormality diagnosis system according to any one of (1) to (6), wherein the condition sensor is a temperature sensor that acquires temperature information of the component.
This configuration enables abnormality diagnosis according to changes in temperature information obtained from the component parts.

(9) The abnormality diagnosis system according to any one of (1) to (6), wherein the condition sensor is a sound sensor that obtains sound information of the component.
This configuration enables abnormality diagnosis according to changes in sound (noise) information obtained from the component parts.

(10) The abnormality diagnosis system according to any one of (1) to (9), wherein the component is a bearing.
According to this configuration, it is possible to perform abnormality diagnosis on the bearing.

(11) A method for diagnosing an abnormality in a component part constituting a moving body, comprising the steps of:
obtaining status information of the component;
acquiring location information of the moving object;
setting an initial value for the state information of the component and a threshold value for a change amount from the initial value based on the state information of the component when the moving body is located in a predetermined section;
and when it is detected that the moving body is located in the specified section based on the position information, performing an abnormality diagnosis of the component based on whether or not a difference between the initial value and the status information of the component exceeds the specified threshold.
According to this configuration, in abnormality diagnosis of components of a moving body, it is possible to prevent breakdowns in the components while reducing the effort involved in the setting work used in the abnormality diagnosis.

(12) A computer is provided with:
acquiring status information of components constituting a moving body;
acquiring location information of the moving object;
setting an initial value for the state information of the component and a threshold value for a change amount from the initial value based on the state information of the component when the moving body is located in a predetermined section;
A program for executing a process of diagnosing an abnormality in the component based on whether or not the difference between the initial value and the status information of the component exceeds the predetermined threshold when it is detected that the moving body is located in the specified section based on the position information.
According to this configuration, in abnormality diagnosis of components of a moving body, it is possible to prevent breakdowns in the components while reducing the effort involved in the setting work used in the abnormality diagnosis.

1, 70...vehicle 10...sensor unit 11...position sensor 12, 72...vibration sensor 20, 71...component 30...diagnosis unit 31...position information acquisition unit 32...vibration information acquisition unit 33...diagnosis processing unit 34...parameter setting unit 35...storage unit 36...notification processing unit 41, 51...communication control unit 60...network

Claims (14)

A status sensor for acquiring status information of components constituting the moving body;
a position sensor for acquiring position information of the moving object;
a setting unit that derives and sets an initial value for the state information of the component and a threshold value for a change amount from the initial value based on the state information of the component when the moving body is located in a predetermined section;
a diagnosis unit that, when it is detected that the moving body is located in the predetermined section based on the position information acquired by the position sensor, performs an abnormality diagnosis of the component based on whether or not a difference between the initial value and the status information acquired by the status sensor exceeds the threshold value ,
The abnormality diagnosis system is characterized in that the setting unit detects a range among the positions of the moving body that satisfies predetermined conditions and sets it as the predetermined section, and sets the predetermined section in correspondence with the initial value and the threshold value. The abnormality diagnosis system according to claim 1, characterized in that the setting unit determines the initial value for the new component based on the state information at the time when the new component performs a certain operation. The abnormality diagnosis system according to claim 1 or 2, characterized in that the setting unit determines the threshold value by applying a predetermined ratio or a fixed value to an initial value set for the component. The abnormality diagnosis system according to any one of claims 1 to 3, characterized in that the setting unit sets multiple thresholds according to the urgency of the abnormality of the component. The abnormality diagnosis system according to any one of claims 1 to 4, characterized in that the setting unit sets the predetermined section based on the movement history of the moving body. The abnormality diagnosis system according to any one of claims 1 to 5, further comprising a notification unit that notifies the result of diagnosis by the diagnosis unit. The abnormality diagnosis system according to any one of claims 1 to 6, characterized in that the condition sensor is a vibration sensor that acquires vibration information of the component. The abnormality diagnosis system according to any one of claims 1 to 6, characterized in that the condition sensor is a temperature sensor that acquires temperature information of the component. The abnormality diagnosis system according to any one of claims 1 to 6, characterized in that the condition sensor is a sound sensor that acquires sound information of the component. The abnormality diagnosis system according to claim 1 , wherein the range satisfying the predetermined condition includes a location where the mobile object periodically travels. The abnormality diagnosis system according to claim 1, wherein the range that satisfies the specified condition includes a position at which a certain amount of driving has been performed since the component was replaced, or includes a position at which a certain amount of driving has been performed since the component was replaced. 12. The abnormality diagnosis system according to claim 1, wherein the component is a bearing. A method for diagnosing an abnormality in a component part constituting a moving body, comprising:
obtaining status information of the component;
acquiring location information of the moving object;
deriving and setting an initial value for the state information of the component and a threshold value for a change amount from the initial value based on the state information of the component when the moving body is located in a predetermined section;
and when it is detected that the moving body is located in the predetermined section based on the position information, diagnosing an abnormality of the component based on whether or not a difference between the initial value and the status information of the component exceeds the threshold value ,
The abnormality diagnosis method is characterized in that the specified section is set by detecting a range of the positions of the moving body that satisfy specified conditions, and the specified section is set in correspondence with the initial value and the threshold value . On the computer,
acquiring status information of components constituting a moving body;
acquiring location information of the moving object;
deriving and setting an initial value for the state information of the component and a threshold value for a change amount from the initial value based on the state information of the component when the moving body is located in a predetermined section;
a step of diagnosing an abnormality of the component based on whether or not a difference between the initial value and the state information of the component exceeds the threshold value when it is detected that the moving body is located in the predetermined section based on the position information ;
Run the command ,
The specified section is set by detecting a range of positions where the moving body moves that satisfies specified conditions, and a program for setting the specified section in correspondence with the initial value and the threshold value .

Images