Condition monitoring device and wind power plant comprising a condition monitoring device

Abstract

The application relates to a state monitoring device (80) comprising a trigger setting unit (82) and a measurement processing unit (83). The trigger setting unit (82) sets a priority of a received trigger signal according to a type of the received trigger signal. When an event trigger signal is received and a timing measurement process whose priority is lower than that of the received event trigger signal is being executed, the measurement processing unit (82) suspends the timing measurement process being executed and starts an event measurement process corresponding to the received event trigger signal.

Description

TECHNICAL FIELD

[0001] The present application relates to a condition monitoring device that executes a measurement process for monitoring a condition of a mechanical component in response to reception of a trigger signal, and more particularly to a condition monitoring device for a wind power generation device. BACKGROUND

[0002] In a wind power generation device, a main shaft connected to a blade that receives wind force rotates, and after the rotational speed of the main shaft is increased by a gearbox, a rotor of a generator is rotated to generate electric power. Each of the rotational shafts of the main shaft, the gearbox, and the generator is rotatably supported by a rolling bearing. A condition monitoring system is known that diagnoses a condition of such a bearing by using measurement data of a vibration sensor fixed to the bearing.

[0003] Some of such condition monitoring systems for wind power generation devices include a condition monitoring device that executes a measurement process using a vibration sensor in response to reception of a trigger signal (see, for example, Japanese Patent Laid-Open No. 2019-52964 (PTL 1)).

[0004] PRIOR ART

[0005] PATENT LITERATURE

[0006] Patent Literature 1: Japanese Patent Laid-Open No. 2019-52964 SUMMARY

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] In a condition monitoring system for a wind power generation device that executes a vibration measurement process in response to reception of a trigger signal, a trigger source that generates the trigger signal is provided outside or inside the condition monitoring device. The trigger source outputs a timing trigger signal to the condition monitoring device at a specified time. The condition monitoring device executes a measurement process corresponding to the timing trigger signal (hereinafter referred to as a "timing measurement process") within a certain time in response to reception of the timing trigger signal from the trigger source.

[0009] In a wind power generation device, sudden events such as lightning, earthquakes, and gusts can cause damage to bearings and gears. Data obtained when such a sudden event occurs can be used as valuable data for diagnosing a condition of the wind power generation device. However, in the timing measurement process, the measurement process does not start until the specified time is reached. Since it is a timing measurement, it is difficult to measure data when a sudden event occurs. Therefore, it is desirable to cause the trigger source to generate a trigger signal different from the timing trigger signal (hereinafter referred to as an "event trigger signal") when a sudden event occurs, and to execute a measurement process corresponding to the event trigger signal (hereinafter referred to as an "event measurement process").

[0010] Because timed measurement processing is repeated at each specified time, it involves a smaller amount of data. Furthermore, operations are performed using smaller amounts of measurement data; for example, measurements are not performed during idle periods. On the other hand, event-based measurement processing executes abruptly, generating measurement data used for diagnostics of wind power generation devices. Therefore, to obtain more detailed data, a process involving a larger amount of data is performed. Thus, the content of event-based measurement processing differs from that of timed measurement processing, and it can be said that event-based measurement processing has a higher priority than timed measurement processing.

[0011] Suppose that the status monitoring device receives an event trigger signal during the execution of timed measurement processing, and will initiate event measurement processing after the ongoing timed measurement processing is completed. In this case, the start time of the high-priority event measurement processing may be delayed. To solve this problem, timed measurement processing and event measurement processing can be executed in parallel, but this requires additional processors (such as a central processing unit (CPU) and memory) to handle parallel processing, and it is sometimes difficult to reserve space for additional processors in a compact wind power generation unit.

[0012] This disclosure aims to solve the above-mentioned problems and its purpose is to suppress delays in the startup timing of high-priority measurement processes without installing an additional processor.

[0013] Technical solutions adopted to solve technical problems

[0014] (1) A state monitoring device that performs measurement processing in response to the receipt of a trigger signal. The state monitoring device includes a setting unit that sets the priority of the received trigger signal based on the type of the received trigger signal; and a measurement processing unit that performs the measurement processing. When a trigger signal is received, and when measurement processing caused by a trigger signal with a lower priority than the received trigger signal is being performed, the measurement processing unit suspends the currently performed measurement processing and starts measurement processing corresponding to the received trigger signal.

[0015] (2) In one aspect, when the trigger signal is received and a measurement process caused by a trigger signal with a higher priority than the received trigger signal is being performed, the measurement processing unit discards the received trigger signal and continues the measurement process being performed.

[0016] (3) In one aspect, when the trigger signal is received and a measurement process caused by a trigger signal with the same priority as the received trigger signal is being executed, the measurement processing unit registers the received trigger signal and continues to execute the measurement process corresponding to the registered trigger signal after the measurement process being executed is completed.

[0017] (4) In one aspect, when a trigger signal with a first priority is received, and a measurement process caused by the trigger signal with the first priority is being executed, the measurement processing unit discards the received trigger signal with the first priority and continues to execute the measurement process being executed. When a trigger signal with a second priority higher than the first priority is received, and a measurement process caused by the trigger signal with the second priority is being executed, the measurement processing unit registers the received trigger signal with the second priority, and after the measurement process being executed is completed, continues to execute the measurement process corresponding to the registered trigger signal.

[0018] (5) In one aspect, the measurement processing includes the processing of outputting vibration measurement values ​​of the bearings installed in the wind power generation device.

[0019] (6) A wind power generation device according to the present invention is a wind power generation device including the above-mentioned condition monitoring device.

[0020] Invention Effects

[0021] In the above configuration, when a trigger signal is received and a measurement process with a lower priority than the received trigger signal is being executed, the measurement processing unit suspends the currently executing measurement process and starts the measurement process corresponding to the received trigger signal. This configuration suppresses the startup time delay of higher-priority measurement processes caused by the execution of lower-priority measurement processes. Furthermore, since the lower-priority measurement process is suspended, no additional processor is needed to handle parallel processing. Therefore, the startup time delay of higher-priority measurement processes can be suppressed without installing an additional processor. Thus, data can be measured at the required time, and the presence of any abnormalities in the target device can be accurately determined based on the measured data. Attached Figure Description

[0022] Figure 1 This is a schematic diagram illustrating a wind power generation device with an applied condition monitoring system.

[0023] Figure 2 This is a functional block diagram representing the functional structure of a condition monitoring system.

[0024] Figure 3 It is a functional block diagram that details the functional structure of the condition monitoring system.

[0025] Figure 4 This is a schematic diagram of an exemplary configuration table for setting the priority and measurement type of trigger signals.

[0026] Figure 5 This is a flowchart illustrating an exemplary process of a status monitoring device.

[0027] Figure 6 This is a schematic diagram illustrating the measurement processing mode performed by the condition monitoring device. Detailed Implementation

[0028] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In the following drawings, the same or corresponding parts are indicated by the same reference numerals and will not be described again.

[0029] Figure 1 This is a schematic diagram illustrating the structure of a wind power generation device 10 using the condition monitoring device 80 according to this embodiment. The wind power generation device 10 includes a main shaft 20, blades 30, a gearbox 40, a generator 50, a main shaft bearing (hereinafter referred to as "bearing") 60, a vibration sensor 70, and a condition monitoring device 80. The gearbox 40, generator 50, bearing 60, vibration sensor 70, and condition monitoring device 80 are stored in a nacelle 90. The nacelle 90 is supported by a tower 100.

[0030] The main shaft 20 enters the nacelle 90, connects to the input shaft of the gearbox 40, and is rotatably supported by the bearing 60. The main shaft 20 transmits the rotational torque generated by the blades 30, which receive wind power, to the input shaft of the gearbox 40. The blades 30 are positioned at the front end of the main shaft 20, converting wind power into rotational torque and transmitting it to the main shaft 20.

[0031] The bearing 60 is fixed in the engine compartment 90 and rotatably supports the main shaft 20. The bearing 60 is composed of rolling bearings, such as self-aligning rolling bearings, tapered rolling bearings, cylindrical rolling bearings, and ball bearings. These bearings can be in a single row or in multiple rows.

[0032] A gearbox 40 is provided between the main shaft 20 and the generator 50 to increase the rotational speed of the main shaft 20 and output it to the generator 50. For example, the gearbox 40 consists of a gear speed-increasing mechanism including a planetary gear train, an intermediate shaft, and a high-speed shaft. Although not shown, the gearbox 40 also includes multiple bearings that rotatably support multiple shafts.

[0033] The generator 50 is connected to the output shaft of the gearbox 40 and generates electricity using the rotational torque received from the gearbox 40. The generator 50 is, for example, an induction generator. The generator 50 also includes bearings that rotatably support the rotor.

[0034] Vibration sensor 70 is fixed to bearing 60. Vibration sensor 70 measures the vibration waveform of bearing 60 and outputs the measured vibration waveform data to condition monitoring device 80. Vibration sensor 70 is, for example, an accelerometer with a piezoelectric element.

[0035] A condition monitoring device 80 is installed inside the cabin 90. The condition monitoring device 80 is connected to the vibration sensor 70 and stores the detection results of the vibration sensor 70 for a certain period of time. Then, in response to a trigger signal received from an external device, the condition monitoring device 80 performs measurement processing using the detection results of the vibration sensor 70 and transmits the data obtained from the measurement processing (hereinafter also referred to as "measurement data") to an external data server.

[0036] Figure 2 It shows including Figure 1 The diagram shows a functional block diagram of the condition monitoring system 1, which includes a vibration sensor 70 and a condition monitoring device 80. The condition monitoring system 1 includes an external device 200 used as a trigger source and a data server 300, as well as the aforementioned vibration sensor 70 and condition monitoring device 80.

[0037] Vibration sensor 70 and condition monitoring device 80 are installed inside cabin 90 as described above. On the other hand, external equipment 200 and data server 300 are installed outside cabin 90.

[0038] When an external detection signal is input, the external device 200 outputs a trigger signal corresponding to the detection signal to the status monitoring device 80 via wired or wireless communication. The detection signals input to the external device 200 include a "timing detection signal Da" and an "event detection signal Db". The "timing detection signal Da" indicates that a predetermined specified time has arrived. The "event detection signal Db" indicates that a sudden event that may damage the wind power generation device 10 has been detected. The event detection signal Db includes: a signal indicating the detection of abnormal vibration; a signal indicating the detection of a lightning strike; a signal indicating the detection of a temperature change exceeding a reference value; a signal indicating the detection of a wind speed change exceeding a reference value; a signal indicating the detection of a wind direction change exceeding a reference value; and a signal indicating the detection of an emergency stop.

[0039] When an external timing detection signal Da is input, the external device 200 outputs a "timing trigger signal A" corresponding to the timing detection signal Da to the status monitoring device 80. When an external event detection signal Db is received, the external device 200 outputs an "event trigger signal B" corresponding to the event detection signal Db to the status monitoring device 80. Examples of external devices 200 include programmable logic controllers (PLCs), Supervisory Control and Data Acquisition (SCADA) systems, and computers used for measurement.

[0040] Although Figure 2 An external device 200 is shown, but the external device 200 can be divided into two or more. Furthermore, although in Figure 2External device 200 is located outside the cabin 90, but external device 200 can also be located inside the cabin 90. For example, an external device with the function of outputting a timed trigger signal A can be installed inside the cabin 90, and an external device with the function of outputting an event trigger signal B can be installed outside the cabin 90.

[0041] In response to a trigger signal (timed trigger signal A or event trigger signal B) received from external device 200, the condition monitoring device 80 performs measurement processing using the detection results of vibration sensor 70 and transmits (uploads) the measurement data obtained from the measurement processing to data server 300.

[0042] Figure 3 This is a functional block diagram that details the functional structure of the condition monitoring system 80. The condition monitoring device 80 includes a trigger detection unit 81, a trigger setting unit 82, a measurement processing unit 83, a timing measurement setting unit 85, an event measurement setting unit 86, a data storage unit 87, and an upload unit 88.

[0043] Upon receiving a trigger signal from external device 200, trigger detection unit 81 stores the moment the trigger signal was received and requests trigger setting unit 82 to set the priority and measurement type corresponding to the received trigger signal. Trigger setting unit 82 sets the priority and measurement type corresponding to the trigger signal received from trigger detection unit 81 and sends the result as trigger setting result to trigger detection unit 81.

[0044] Figure 4 This is a schematic diagram of an exemplary configuration table used to set the priority and measurement type of the trigger signal. For example... Figure 4 As shown in the setting table, for the timed trigger signal A, the measurement type is set to "timed measurement" and the priority is set to "0". For the event trigger signal B, the measurement type is set to "event measurement" and the priority is set to "1". Priority "1" indicates that it is higher than priority "0". The trigger setting unit 82 is referenced. Figure 4 The setting table shown sets the priority and measurement type corresponding to the trigger signal received from the trigger detection unit 81, and sends the result as the trigger setting result to the trigger detection unit 81.

[0045] Back Figure 3 After receiving the trigger setting result from the trigger setting unit 82, the trigger detection unit 81 notifies the measurement processing unit 83 of the trigger setting result received from the trigger setting unit 82 and the time when the trigger signal is received.

[0046] The measurement processing unit 83 is configured to perform measurement processing based on a notification from the trigger detection unit 81. When the measurement type included in the trigger setting result given by the trigger detection unit 81 is "timed measurement", the measurement processing unit 83 requests the timed measurement setting unit 85 to set the processing content for the timed measurement. In response to the request from the measurement processing unit 83, the timed measurement setting unit 85 sets the processing content for the timed measurement and returns the set processing content to the measurement processing unit 83. In this embodiment, the timed measurement processing is set to "output the measurement data from the time the timed trigger signal A is received until a predetermined time Ta has elapsed to the data server 300".

[0047] On the other hand, when the trigger setting result given by the trigger detection unit 81 includes "event measurement" as the measurement type, the measurement processing unit 83 requests the event measurement setting unit 86 to set the event measurement processing content. In response to the request from the measurement processing unit 83, the event measurement setting unit 86 sets the event measurement processing content and returns the set processing content to the measurement processing unit 83. In this embodiment, the event measurement processing is set to "output the measurement data from the time the event trigger signal B is received, prior to a predetermined time, until a predetermined time Tb has elapsed, to the data server 300". Thus, the content of the event measurement processing differs from the content of the timing measurement processing.

[0048] The concepts of timed measurement processing and event-based measurement processing are illustrated by example only and are not limited to those described above. For instance, timed measurement processing might involve a smaller amount of data because it is executed repeatedly, while event-based measurement processing might involve a larger amount of data to obtain more detailed data.

[0049] The measurement processing unit 83 reads the measurement data stored in the data storage unit 87 according to the processing content received from the timing measurement setting unit 85 or the event measurement setting unit 86, and outputs the read measurement data to the upload unit 88.

[0050] When performing timed measurement processing, the measurement processing unit 83 requests the data storage unit 87 to send measurement data for the period from the receipt of the timed trigger signal A until the elapsed time Ta. When performing event measurement processing, the measurement processing unit 83 requests the data storage unit 87 to send measurement data for the period from the time the event trigger signal B was received, prior to the elapsed time Tb.

[0051] The data storage unit 87 continuously acquires measurement data through the vibration sensor 70 and stores the acquired measurement data along with the measurement time for a certain period (a period long enough compared to predetermined times Ta and Tb). The data storage unit 87 reads measurement data for the period requested by the measurement processing unit 83 from the stored measurement data and sends the read measurement data to the measurement processing unit 83. The measurement processing unit 83 outputs the measurement data received from the data storage unit 87 to the upload unit 88.

[0052] The uploading unit 88 outputs (uploads) the measurement data received from the measurement processing unit 83, along with the time of receiving the trigger signal and the trigger setting result of the trigger setting unit 82, to the data server 300 via wired or wireless communication.

[0053] The data server 300 performs diagnostic processing on the status of the wind power generation device 10 based on the measurement data received from the upload unit 88.

[0054] <Priority of Trigger Signals and Measurement Processing>

[0055] The timed measurement process is repeated at each specified time. In contrast, when sudden events such as lightning, earthquakes, or gusts occur, event-based measurement processing is performed, and the measurement data obtained from the event-based measurement process is used for the diagnosis of the wind power generation device 10. Therefore, it can be said that event-based measurement processing has a higher priority than timed measurement processing.

[0056] Suppose that an event trigger signal B is received while the timing measurement process is being executed, then the event measurement process will be initiated after the timing measurement process is completed. In this case, the start time of the event measurement process, which has a higher priority, may be delayed. To solve this problem, the timing measurement process and the event measurement process can be executed in parallel, but this requires additional processors (such as CPU and memory) to handle the parallel processing, and it is sometimes difficult to reserve space in the compact nacelle 90 of the wind turbine generator 10 to install additional processors.

[0057] In view of the above, the state monitoring device 80 according to this embodiment sets a priority for the trigger signals received from the external device 200. Specifically, as described above, the priority of the timing trigger signal A is set to "0", and the priority of the event trigger signal B is set to "1", which is higher than zero. Then, when the event trigger signal B is received, and timing measurement processing caused by the timing trigger signal A, which has a priority of "0" (lower than the priority of event trigger signal B), is being executed, the state monitoring device 80 stops the ongoing timing measurement processing and starts the event measurement processing corresponding to the received event trigger signal B. This can suppress the start time delay of the event measurement processing with higher priority.

[0058] Figure 5 This is a flowchart illustrating an exemplary process performed by the condition monitoring device 80 for measurement processing. This flowchart is repeated each time a predetermined condition is met (e.g., at predetermined intervals). First, the condition monitoring device 80 determines whether a trigger signal has been received from the external device 200 (step S10).

[0059] [If a trigger signal is received]

[0060] If the status monitoring device 80 receives a trigger signal from the external device 200 (yes in step S10), then the status monitoring device 80 refers to the above. Figure 4 The setting table shown determines whether the priority of the received trigger signal is "1" (i.e., whether the trigger signal is event trigger signal B) (step S20).

[0061] (If an event trigger signal B with priority "1" is received)

[0062] If the priority of the received trigger signal is "1" (yes in step S20), that is, if the event trigger signal B is received, the status monitoring device 80 determines whether an event measurement process with the same priority "1" as the received event trigger signal B is being executed (step S22).

[0063] If event measurement processing is in progress (step S22 is yes), the state monitoring device 80 registers the received event trigger signal B (step S24). Therefore, the ongoing event measurement processing will continue as is. Subsequently, the state monitoring device 80 skips subsequent processing and moves to the return state.

[0064] The event trigger signal B registered in step S24 is considered a "registered trigger signal" in subsequent calculation loops. After the ongoing event measurement process is completed, the event measurement process corresponding to the registered trigger signal continues to be executed.

[0065] If the event measurement process is not being executed (step S22 is no), the status monitoring device 80 determines whether a timing measurement process with a priority of "0" that is lower than the priority of the event trigger signal B received this time is being executed (step S26).

[0066] If no timed measurement processing is being performed (step S26 is no), the status monitoring device 80 performs the event measurement processing corresponding to the event trigger signal B received this time (step S30).

[0067] On the other hand, if timing measurement processing is being performed (step S26 is yes), the status monitoring device 80 suspends the timing measurement processing being performed (step S28) and performs event measurement processing corresponding to the event trigger signal B received this time (step S30).

[0068] (If a timed trigger signal A with priority "0" is received)

[0069] If the priority of the received trigger signal is "0" (No in step S20), that is, the timed trigger signal A is received, the status monitoring device 80 determines whether an event measurement process with a priority of "1" that is higher than the priority of the received timed trigger signal A is being executed (step S40).

[0070] If an event measurement process is in progress (yes in step S40), the status monitoring device 80 discards the received timing trigger signal A (step S46). Therefore, the event measurement process with priority "1" that is currently being executed will continue to run.

[0071] If the event measurement process is not being executed (step S40 is No), the state monitoring device 80 determines whether a timing measurement process with priority "0" (the same priority as the received timing trigger signal A) is being executed (step S42). If a timing measurement process is being executed (step S42 is Yes), the state monitoring device 80 discards the received timing trigger signal A (step S46). Therefore, the timing measurement process with priority "0" that is currently being executed will continue to be executed.

[0072] If no timing measurement process is being performed (step S42 is no), the status monitoring device 80 performs the timing measurement process corresponding to the timing trigger signal A received this time (step S44).

[0073] [No trigger signal received]

[0074] The process performed when it is determined that no trigger signal was received in step S10 (step S10 is No) will now be described. In this case, the status monitoring device 80 determines whether an event measurement process with priority "1" is being executed (step S11). If the event measurement process is being executed (step S11 is Yes), the status monitoring device 80 will skip the subsequent processing and move to the return step.

[0075] If the event measurement process is not being executed (step S11 is negative), the state monitoring device 80 determines whether a registered trigger signal exists (step S12). The registered trigger signal is the event trigger signal B registered in step S24 in the previous calculation cycle. If the registered trigger signal does not exist (step S12 is negative), the state monitoring device 80 skips subsequent processing and moves to the return step.

[0076] If a registered trigger signal exists (yes in step S12), the status monitoring device 80 performs the processing after step S20 for the registered trigger signal. That is, since the registered trigger signal is an event trigger signal B with priority "1", it is determined to be yes by the monitoring device 80 in step S20. Furthermore, since no event measurement processing with priority "1" is being executed as determined in step S11, it is determined to be no in step S22, and the event measurement processing corresponding to the registered trigger signal is executed in step S30.

[0077] After step S30, the state monitoring device 80 discards the registered trigger signals (step S32). That is, even if multiple registered trigger signals exist, the state monitoring device 80 according to this embodiment discards the second and subsequent registered trigger signals because the event measurement process corresponding to the first registered trigger signal has been executed. Therefore, the event measurement process corresponding to the second and subsequent registered trigger signals is not executed.

[0078] Figure 6 This is a schematic diagram illustrating the measurement processing mode performed by the condition monitoring device 80. Figure 6 In the diagram, the horizontal axis represents time, and the vertical axis, starting from the top, sequentially represents the measurement processing modes (1) to (5). Figure 6 In each mode (1) to (5), a timing trigger signal A is generated at specified times t10, t20 and t30.

[0079] In mode (1), no event trigger signal B is generated at any time. In this case, whenever a timing trigger signal A is received at specified times t10, t20, and t30, the status monitoring device 80 performs timing measurement processing. In this embodiment, as described above, timing measurement processing is the process of outputting measurement data from the time the timing trigger signal A is received until a predetermined time Ta has elapsed to the data server 300.

[0080] In mode (2), an event trigger signal B is generated at time t11 when no timing measurement processing is performed. In this case, the state monitoring device 80 performs event measurement processing in response to the event trigger signal B received at time t11. In this embodiment, event measurement processing is the process of outputting measurement data from the time the event trigger signal B is received to the data server 300 for a predetermined period of time until a predetermined period Tb has elapsed. In mode (2), since the period during which timing measurement processing is performed does not overlap with the period during which event measurement processing is performed, each process is performed as usual.

[0081] In mode (3), an event trigger signal B is generated at time t21, when the timing measurement process corresponding to the timing trigger signal A received at a specified time t20 is being executed. In this case, in response to the event trigger signal B received at time t21, the state monitoring device 80 suspends the ongoing timing measurement process and executes the event measurement process corresponding to the event trigger signal B received at time t21. This can suppress the start-up time delay of event measurement processes with higher priority. Accordingly, it can prevent event measurement processes with higher priority from failing to capture measurement data. Furthermore, since the event measurement process is executed after the ongoing timing measurement process is suspended, no additional processor is required to handle parallel processing. Therefore, the start-up time delay of measurement processes with higher priority can be suppressed without installing an additional processor.

[0082] In mode (4), during the execution of event measurement processing corresponding to the event trigger signal B received at a specified time t14, a specified time t20 is reached, and a timing trigger signal A is generated. In this case, the timing trigger signal A generated at the specified time t20 is discarded, and the ongoing event measurement processing continues. Therefore, event measurement processing with higher priority can continue to be executed without installing an additional processor.

[0083] In mode (5), during the execution of the event measurement process corresponding to the event trigger signal B generated at time t11, the first event trigger signal B is generated at time t12, and the second event trigger signal B is generated at the subsequent time t13. In this case, the first event trigger signal B is registered as a registered trigger signal and continues execution after the ongoing event measurement process is completed. Therefore, measurement data can be acquired without discarding the event trigger signal B with higher priority.

[0084] The second event trigger signal B is temporarily registered as a registered trigger signal, but is discarded at the point in time when the event measurement process corresponding to the first event trigger signal B is executed. This prevents unnecessary continuation of the event measurement process.

[0085] In mode (5), during the execution of event measurement processing corresponding to the first event trigger signal B generated at a specified time t11, a specified time t20 is reached, and a timing trigger signal A is generated. In this case, the timing trigger signal A generated at the specified time t20 is discarded, and the ongoing event measurement processing continues.

[0086] As described above, the status monitoring device 80 according to this embodiment includes a trigger setting unit 82 and a measurement processing unit 83. The trigger setting unit 82 sets the priority of the received trigger signal according to the type of the received trigger signal. When an event trigger signal B is received, and a timing measurement process with a lower priority than the received event trigger signal B is being executed, the measurement processing unit 83 suspends the ongoing timing measurement process and starts the event measurement process corresponding to the received event trigger signal B. This suppresses the start-up time delay of the event measurement process with a higher priority due to the ongoing execution of a timing measurement process with a lower priority. Furthermore, since the measurement process being executed with a lower priority is suspended, it is not necessary to install an additional processor to handle parallel processing. Therefore, the start-up time delay of the event measurement process with a higher priority can be suppressed without installing an additional processor. Therefore, data can be measured at the required time, and it can be accurately determined whether there is an anomaly in the wind power generation device 10, which is the target of the measurement, based on the measured data.

[0087] Furthermore, when a timing trigger signal A is received and an event measurement process with a higher priority than the received timing trigger signal A is being executed, the measurement processing unit 83 according to this embodiment discards the received timing trigger signal A and continues executing the ongoing event measurement process. Therefore, event measurement processes with higher priority can continue to be executed without installing an additional processor.

[0088] Furthermore, when an event trigger signal B is received and an event measurement process with the same priority as the received event trigger signal B is being executed, the measurement processing unit 83 of this embodiment registers the received event trigger signal B, and continues to execute the event measurement process corresponding to the registered event trigger signal B after the ongoing event measurement process is completed. Therefore, measurement data can be acquired without discarding the event trigger signal B, which has a higher priority.

[0089] Furthermore, when a timing trigger signal A with priority "0" is received, and a timing measurement process with priority "0" that has the same priority as the received timing trigger signal A is being executed, the measurement processing unit 83 according to this embodiment discards the received timing trigger signal A and continues to execute the ongoing timing measurement process. Therefore, unnecessary continuation of timing measurement processes with lower priority can be suppressed.

[0090] The embodiments disclosed herein should be understood as illustrative in all respects and not restrictive. The scope of this disclosure is not described in the above embodiments but is set forth in the claims, and it is intended herein to include all modifications in the sense and scope equivalent to the claims.

[0091] Figure Labels

[0092] 1. Condition monitoring system; 10. Wind power generation unit; 20. Main shaft; 30. Blades; 40. Gearbox; 50. Generator; 60. Bearing; 70. Vibration sensor; 80. Condition monitoring device; 81. Trigger detection unit; 82. Trigger setting unit; 83. Measurement processing unit; 85. Timing measurement setting unit; 86. Event measurement setting unit; 87. Data storage unit; 88. Upload unit; 90. Nacelle; 100. Tower; 200. External equipment; 300. Data server.

Claims

1. A state monitoring apparatus that executes a measurement process in response to reception of a trigger signal, characterized by, comprising: a setting unit that sets a priority of a received trigger signal based on a type of the received trigger signal; and a measurement processing unit that executes the measurement processing, when the trigger signal is received and when a measurement processing caused by a trigger signal having a priority lower than a priority of the received trigger signal is being executed, the measurement processing unit suspends the measurement processing being executed and starts the measurement processing corresponding to the received trigger signal, when a trigger signal having a first priority is received and when a measurement processing caused by a trigger signal having the first priority is being executed, the measurement processing unit discards the received trigger signal and continues the measurement processing being executed, when a trigger signal having a second priority higher than the first priority is received and when a measurement processing caused by a trigger signal having the second priority is being executed, the measurement processing unit registers the received trigger signal and, after the measurement processing being executed is completed, continues the measurement processing corresponding to the registered trigger signal.

2. A state monitoring apparatus which executes a measurement process in response to reception of a trigger signal, characterized by, comprising: a setting unit that sets a priority of a received trigger signal based on a type of the received trigger signal; and a measurement processing unit that executes the measurement processing, when the trigger signal is received and when a measurement processing caused by a trigger signal having a priority lower than a priority of the received trigger signal is being executed, the measurement processing unit suspends the measurement processing being executed and starts the measurement processing corresponding to the received trigger signal, when the trigger signal is received and when a measurement processing caused by a trigger signal having a priority same as a priority of the received trigger signal is being executed, the measurement processing unit registers the received trigger signal and, after the measurement processing being executed is completed, continues the measurement processing corresponding to the registered trigger signal.

3. The condition monitoring device according to claim 1 or 2, wherein when the trigger signal is received and when a measurement processing caused by a trigger signal having a priority higher than a priority of the received trigger signal is being executed, the measurement processing unit discards the received trigger signal and continues the measurement processing being executed.

4. The condition monitoring device according to claim 1 or 2, wherein the measurement processing includes a processing of outputting a vibration measurement value of a bearing installed in a wind power generation device.

5. A wind power plant, characterized in that a condition monitoring device according to claim 1 or 2.

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