阅读说明：本技术 用于监测旋转装置的方法以及状态监测设备 (Method for monitoring a rotating device and condition monitoring device ) 是由 马切伊·奥曼 曼纽尔·奥里奥尔 帕拉维·胡杰班德 普拉萨德·维尼卡 特贾斯·阿图尔·特里维迪 于 2020-05-26 设计创作，主要内容包括：本发明涉及一种通过状态监测设备监测旋转装置的方法。在每个预定时间段内的每个预定时间间隔之后执行该方法。该方法包括基于与旋转装置中的振动相关联的信号来检测旋转装置中振动的存在。使用多个传感器中的一个或多个传感器来测量信号。在检测到振动的存在时,以第一频率获取与振动相关联的预定数量的样本。使用预定数量的样本计算振动的均方根(RMS)值。将计算出的振动均方根值与用于检测运行状态的参考值进行比较,该参考值在每个预定时间间隔被存储。此后,该方法包括处理被存储的信息以评估旋转装置的状态。(The invention relates to a method for monitoring a rotating device by means of a condition monitoring device. The method is performed after each predetermined time interval within each predetermined time period. The method includes detecting a presence of vibration in the rotating device based on a signal associated with the vibration in the rotating device. The signal is measured using one or more of the plurality of sensors. Upon detecting the presence of the vibration, a predetermined number of samples associated with the vibration are acquired at a first frequency. A Root Mean Square (RMS) value of the vibration is calculated using a predetermined number of samples. The calculated vibration root mean square value is compared with a reference value for detecting an operation state, which is stored at every predetermined time interval. Thereafter, the method includes processing the stored information to evaluate a state of the rotating device.)

1. A method of monitoring a rotating device (100) with a condition monitoring apparatus (101), wherein the condition monitoring apparatus (101) comprises a plurality of sensors (204, 205, 206) for monitoring one or more parameters associated with the rotating device (100), the method comprising:

after each predetermined time interval, performing for each predetermined time period:

a. detecting the presence of vibrations in the rotating device (100) based on a signal associated with the vibrations in the rotating device (100), wherein the signal is measured using one or more sensors of the plurality of sensors (204, 205, 206) and corresponds to a measured position of the one or more sensors based on a placement of the condition monitoring apparatus (101) relative to the rotating device (100);

b. upon detecting the presence of vibration in the rotating device (100), acquiring a predetermined number of samples associated with the vibration at a first frequency, wherein the predetermined number of samples are acquired using the one or more sensors;

c. Using the predetermined number of samples to calculate a Root Mean Square (RMS) value of the vibration;

d. comparing the calculated RMS value of vibration with a reference value for detecting an operational state of the rotating device (100), wherein the reference value is calculated from data measured by the plurality of sensors (204, 205, 206) at the beginning of the predetermined time period;

e. -storing said operating state of said rotating device (100) for a plurality of predetermined time intervals based on said comparison; and

f. processing the information stored for the plurality of predetermined time intervals during the predetermined time period to assess the state of the rotating device (100).

2. The method according to claim 1, wherein the reference value is calculated based on vibration data measured at the beginning of each predetermined time period.

3. The method according to claim 1, wherein the rotating device (100) receives power at a variable frequency, which is used for the calculation of the reference value at the beginning of each predetermined time period.

4. The method of claim 1, wherein the state of the rotating device (100) is determined based on the processing information associated with the plurality of predetermined time intervals and the processing information associated with the predetermined period of time.

5. The method according to claim 1, wherein the operational state of the rotating device (100) comprises information on one or more starts of the rotating device (100) and one or more stops of the rotating device (100) at the plurality of predetermined time intervals.

6. The method of claim 5, wherein the operational state of a rotating device (100) is identified as being at one or more stops upon detecting no vibration in the rotating device (100).

7. A condition monitoring device (101) for monitoring a rotating apparatus (100), the condition monitoring device (101) comprising:

a plurality of sensors (204, 205, 206) configured to:

measuring data of the rotating device (100) at the beginning of a predetermined time period; and

at each of the predetermined time intervals, the time interval,

one or more of the plurality of sensors (204, 205, 206) are configured to generate a signal associated with vibration at a measurement location relative to the rotating device (100); and

acquiring a predetermined number of samples associated with the vibration at a first frequency;

a network interface (203) configured to communicate with a server (301);

a processor (202), wherein after each predetermined time interval within a predetermined time period, the processor (202) is configured to:

Detecting the presence of vibrations in the rotating device (100) based on the generated signal;

calculating a Root Mean Square (RMS) value of the vibration using the acquired predetermined number of samples;

comparing the calculated RMS value with a reference value for detecting an operational state of the rotating device (100), wherein the reference value is calculated based on data measured by the plurality of sensors (204, 205, 206) at the beginning of the predetermined time period;

-storing said operating state of said rotating device (100) for a plurality of predetermined time intervals based on said comparison;

processing the stored information for the plurality of predetermined time intervals over the predetermined time period to assess a state of the rotating device (100); and

a memory (201) communicatively coupled with the processor (202).

8. The condition monitoring device (101) according to claim 7, wherein the condition of the rotating apparatus (100) is determined based on the processing information associated with the plurality of predetermined time intervals and the processing information associated with the predetermined time period.

9. The condition monitoring device (101) according to claim 7, wherein the operational state of the rotating means (100) comprises information of one or more starts of the rotating means (100) and one or more stops of the rotating means (100) at a plurality of predetermined time intervals.

10. The condition monitoring device (101) according to claim 7, further comprising:

providing data measured by each of the plurality of sensors (204, 205, 206) to the server (301); and

receiving information for evaluating the state of the rotating device (100),

wherein the information is processed at the server (301) based on the provided data.

Technical Field

The present disclosure relates generally to condition monitoring of rotating devices. More particularly, the present disclosure relates to a method for monitoring a rotating device and a condition monitoring apparatus.

Background

Rotating devices such as motors, generators, pumps, etc. are of great importance in industrial applications. Rotating devices are subject to environmental, mechanical, etc. problems, most of which can be remedied. Due to these problems, condition monitoring of rotating devices has become an important factor in the industry. Condition monitoring of a rotating device is the process of monitoring parameters of a particular condition in the rotating device, such as vibration, temperature, etc., to identify significant changes indicative of a developing fault. Usage status monitoring will allow scheduling of maintenance or other actions to be taken to prevent collateral damage and avoid its consequences.

Today, in almost all applications, rotating devices, such as motors, are used. The motors are distinguished based on a number of factors, one of which is the run time of the motor. The operating time of the motor differs based on the duty cycle. For example, some motors run continuously, while some may run for a period of time.

A plurality of parameters of the motor are monitored during condition monitoring. One of the parameters is the start and stop state of the motor. In general, for a continuously running motor, it may be less important to determine the exact start and stop times. Currently, the operating state of the motor is determined on an hourly basis. Therefore, motor start and stop events are recorded with a resolution of about one hour. This resolution may be well suited for continuously operating motors. However, for motors with intermittent duty cycles, it may be desirable to monitor the operating conditions more frequently. Intermittent duty cycles are periods of operation that occur on an interval basis. Therefore, it is desirable to detect the start and stop events of the rotating device with a smaller resolution period.

Disclosure of Invention

One aspect of the present disclosure relates to a method of monitoring a rotating device using a condition monitoring apparatus. The condition monitoring device includes a plurality of sensors for measuring one or more parameters associated with the rotating device and a processor for processing data measured using the plurality of sensors. The method is performed after each predetermined period of time and each predetermined time interval.

The method includes detecting a presence of vibration in the rotating device based on a signal associated with the vibration in the rotating device. The signal is measured by one or more sensors of the plurality of sensors and corresponds to a measured position of the one or more sensors based on a placement of the condition monitoring device relative to the rotating device. Upon detecting the presence of vibration in the rotating device, the method includes: a predetermined number of samples associated with the vibration are acquired at a first frequency. A predetermined number of samples are acquired using one or more sensors. A predetermined number of samples are used to calculate a Root Mean Square (RMS) value of the vibration. Further, the method includes comparing the calculated RMS value of the vibration with a reference value for detecting an operating state of the rotating device. The reference value is calculated from data measured by the plurality of sensors at the beginning of the predetermined time period. Specifically, the reference value is calculated based on vibration data measured at the start of each predetermined period. In one embodiment, the rotating means receives power at a variable frequency, which is used to calculate the reference value at the beginning of each predetermined time period. In one embodiment, the operational state of the rotating means comprises information on one or more starts of the rotating means and one or more stops of the rotating means at a plurality of predetermined time intervals. In one embodiment, the operational state of the rotating device is detected as activated if the RMS value is greater than a reference value. Further, the method includes storing the operation state of the rotating device detected for each predetermined time interval. Thereafter, the method includes processing the stored information for each predetermined time interval over a predetermined period of time to evaluate the state of the rotating device. In one embodiment, the state of the rotating device is determined based on the processed information associated with the plurality of predetermined time intervals and the processed information associated with the predetermined period of time.

In one embodiment, the present disclosure may relate to a condition monitoring apparatus for monitoring a rotating device. The condition monitoring device includes a plurality of sensors configured to measure data associated with the rotating device. At each predetermined time interval, one or more of the plurality of sensors is configured to generate a signal associated with the vibration at a measurement location relative to the rotating device and to acquire a predetermined number of samples associated with the vibration at the first frequency. Further, the condition monitoring device includes a network interface configured to communicate with the server and the processor. After each predetermined time interval, the processor performs one or more operations for a predetermined period of time. In particular, the processor detects the presence of vibrations in the rotating device based on signals generated by one or more sensors. Upon detecting a vibration based on the signal, the processor uses a predetermined number of samples received from the one or more sensors to calculate a Root Mean Square (RMS) value of the vibration. In addition, the processor compares the calculated RMS value with a reference value to detect an operational state of the rotating device. The reference value is calculated based on data measured by the plurality of sensors at the beginning of the predetermined time period. The detected operating state is stored in the memory every predetermined time interval. The memory is communicatively coupled to the processor. Thereafter, the processor processes the stored information for each predetermined time interval over a predetermined period of time to assess the state of the rotating device.

The processor may optionally include using a network interface to provide the server with data measured by each of the plurality of sensors. Further, information for evaluating a state of the rotating device is received. The information is processed on the server according to the provided data.

Drawings

The novel features and characteristics of the present disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying drawings. One or more embodiments will now be described, by way of example only, with reference to the accompanying schematic drawings in which like reference symbols indicate like elements, and in which:

FIG. 1 shows a motor schematic including a condition monitoring device according to an embodiment of the present disclosure;

FIG. 2 shows a functional block diagram of a condition monitoring device according to an embodiment of the present disclosure;

FIG. 3 illustrates an exemplary embodiment of a condition monitoring apparatus for communicating with a server to monitor a rotating device in accordance with an embodiment of the present disclosure;

FIG. 4 shows a flow diagram of a method for monitoring a rotating device according to an embodiment of the present disclosure; and

FIG. 5 illustrates an exemplary graph representing an operating state of a rotary device apparatus according to an embodiment of the disclosure.

Detailed Description

Embodiments of the present disclosure relate to a method for monitoring a rotating device and a condition monitoring apparatus. In one embodiment, the rotating device may be one of a motor, a generator, a pump, etc. used in an industrial environment. A condition monitoring device associated with the rotating apparatus is used to perform the method. A condition monitoring device may be secured to the rotating device to monitor the rotating device. Specifically, the state monitoring apparatus may detect an operation state of the rotating device based on the monitoring to access the state of the rotating device.

Referring now to fig. 1, a schematic diagram of a motor 100 is shown. The motor 100 may be any motor that operates at an intermittent duty cycle. In one embodiment, the intermittent duty cycle may be defined as a period of operation that occurs on an interval basis (e.g., a one hour duty cycle). As shown in fig. 1, a condition monitoring apparatus 101 is attached to the motor 100. The condition monitoring device 101 may monitor the motor 100 to access the condition of the motor 100. Specifically, the state monitoring device 101 may monitor the motor 100 every predetermined period of time to detect the motor 100 operating state. For example, the predetermined period of time may be one hour. The monitoring may be performed after each predetermined time interval for a predetermined period of time. For example, the predetermined time interval may be 2.5 minutes. Thus, in this case, the monitoring may be performed after every 2.5 minutes in a period of one hour. Monitoring and processing data at the rotating device at predetermined time intervals may save memory space and result in energy savings for the condition monitoring apparatus 101. The operation state of the motor 100 may include information on the start of the motor 100 and the stop of the motor 100 at predetermined time intervals. The operational state may be detected at a plurality of predetermined time intervals. For example, the operation state may include information on whether the motor 100 is in the start position or the stop position at every predetermined time interval. Information associated with the operating state may be processed to access the state of the motor 100.

FIG. 2 shows a functional block diagram of a condition monitoring device according to an embodiment of the present disclosure.

A simplified representation of a condition monitoring device 101 is shown in fig. 2. The condition monitoring device 101 includes a housing body 103, the housing body 103 being attachable to a body or housing or frame of a rotating apparatus, such as the motor 100 (shown in fig. 1). The housing body 103 houses a plurality of sensors including, but not limited to, a vibration sensor 204, a magnetic field sensor 205, and other sensors 206. The vibration sensor 204, the magnetic field sensor 205 are referred to in this disclosure as one or more sensors. One or more sensors record and transmit measurement signals. One or more sensors may perform measurements based on the placement of the condition monitoring device 101 relative to the rotating device.

Further, the condition monitoring device 101 comprises a memory 201 for storing data. The data may include data measured by one or more sensors while monitoring the rotating device. The data may include a reference value for detecting an operation state of the rotating device. Further, the data includes operating conditions calculated for the rotating device over a plurality of predetermined time intervals.

In one embodiment, a vibration sensor 204, such as an accelerometer, may be used to measure vibrations in the rotating device. The vibration sensor 204 is used to measure the vibration of the rotating device after each predetermined time interval and is then used by the condition monitoring apparatus 101 to detect the operating condition of the rotating device. The vibration sensor 204 (i.e., an accelerometer, for example) is configured to perform or measure vibration data after each predetermined time interval. For example, the accelerometer may be in a "wake vibration mode". The vibration sensor 204 may be associated with a timer, which may be configured to measure data after each predetermined time interval.

In one embodiment, the magnetic field sensor 205 or magnetometer may be used to measure the magnetic flux around a rotating device (such as the motor 100). The magnetic field sensor 205 is a transducer that converts magnetic field strength into an electrical signal. The measured magnetic flux is used to calculate the line frequency of the rotating device. At the beginning of each predetermined time period, data from vibration sensor 204 and magnetic field sensor 205 are measured to calculate a reference value for the RMS value of the vibration.

Further, the condition monitoring device 101 may comprise a network interface 203, the network interface 203 being configured for communication with external entities. In one embodiment, the network interface 203 is capable of communicating over a wireless medium such as Bluetooth, WirelessHART, or the like. As shown in fig. 2, the network interface 203 may use an antenna 207 to communicate with external entities. In another embodiment, the network interface 203 may be configured to facilitate communication between the processor 202 and external entities. The external entity may include a server or the like. FIG. 3 illustrates an exemplary embodiment of a condition monitoring device in communication with a server for monitoring a rotating apparatus, according to an embodiment of the present disclosure. In one embodiment, as shown in FIG. 3, a condition monitoring device 101 associated with the rotating equipment, motor 100, is connected to a server 301. In this case, depending on the relative placement, one or more sensors may measure data and send the measurements to the processor 202, and the processor 202 may transmit the raw data to the server 301 through the network interface 203 for processing. The condition monitoring device 101 receives processed information from the server 301 to evaluate the condition of the motor 100.

Further, the condition monitoring apparatus 101 also includes a processor 202, the processor 202 configured to receive measurements from one or more sensors and detect an operational condition of the rotating device. The processor 202 is configured to periodically monitor and detect the operational status of the rotating device after each predetermined period of time. After each predetermined time interval in the predetermined time period, the processor 202 receives a signal associated with the vibration from the vibration sensor 204 to detect the presence of the vibration in the rotating device.

For example, vibrations in the motor 100 may be detected by a vibration sensor 204 (such as an accelerometer) that may send a signal to the processor 202 for collecting data. Based on the placement of the condition monitoring device 101 relative to the rotating apparatus, the signal corresponds to the measured position of the vibration sensor 204. In the event that vibration is detected, the processor 202 obtains a predetermined number of samples of vibration from the vibration sensor 204 at a first frequency. In an example, the predetermined number of samples may be sixty-four samples and the first frequency may be two kilohertz. A predetermined number of samples of the vibration are taken to calculate a Root Mean Square (RMS) value of the vibration of the rotating device.

Those skilled in the art will appreciate that any predetermined number of samples may be taken to determine the RMS value of the vibration in the present invention. In one embodiment, the RMS value of the vibration is calculated by any known technique. Further, the processor is configured to compare the root mean square value of the vibration with a reference value to detect an operation state of the rotating device at predetermined time intervals. In one embodiment, processor 202 calculates a reference value at the beginning of a predetermined time period based on data measured by a plurality of sensors. If it is determined that the RMS value of the vibration is greater than the reference value, it is detected that the rotating device is in an activated state. Also, if it is determined that the RMS value of the vibration is smaller than the reference value, it is detected that the rotating device is in a stopped state. The operating state detected at each predetermined time interval in the predetermined period of time is processed to evaluate the state of the rotating device.

Fig. 4 shows a flow diagram of a method for monitoring a rotating device according to an embodiment of the present disclosure.

FIG. 4 shows a flow diagram of a method for monitoring a rotating device in accordance with an embodiment of the invention. Rotating devices may typically be present in industrial environments, such as process plants and the like.

A rotating device such as a motor 100 is associated with a condition monitoring apparatus 101. The condition monitoring device 101 is mounted/attached on the rotating means for monitoring. The state monitoring apparatus 101 detects the operating state of the rotating device at every predetermined time interval, which is used to evaluate the state of the rotating device.

At the beginning of each predetermined time period of the rotating device (e.g., motor 100), the condition monitoring apparatus 101 determines a reference value for the vibration based on data measured by a plurality of sensors. In one embodiment, the rotating means receives power at a variable frequency, which is used to calculate the reference value. Thus, the reference value is updated every predetermined period of time.

The condition monitoring device 101 receives a plurality of samples (e.g., 1024 samples) measured by the vibration sensor 204 at a predetermined frequency (e.g., 2kHz) to determine the kurtosis and the speed RMS. Measurements from multiple sensors may be used to calculate the speed and line frequency of the rotating device. In one embodiment, the speed and line frequency of the rotating device can be determined using any known technique. Further, the condition monitoring device 101 receives a plurality of samples measured by the magnetic field sensor 205 at a predetermined frequency (e.g., 300Hz) to determine a frequency spectrum. In one embodiment, multiple samples may be collected from a multi-axis magnetic field sensor. The measured RMS value is compared to a vibration threshold to detect whether the rotating device is in a start/stop state. In particular, if the measured RMS value is greater than the vibration threshold, it is detected that the rotating device is in an activated state. If the rotating means is detected to be in the activated state, the reference value is updated to the RMS value. The reference value is stored in the memory 201. Subsequently, after a predetermined time interval (e.g., after two and a half minutes), the condition monitoring device 101 may receive data from one or more sensors.

At block 401, the method includes detecting a presence of vibration in a rotating device based on a signal associated with the vibration. In one embodiment, the vibration sensor 204 may wait a certain time (e.g., two seconds) to detect the presence of vibration. If no vibration is detected in a certain time, the state monitoring apparatus 101 may check whether the rotating device is switched to "ON" and perform vibration detection a predetermined number of times. The detection of the vibration is started after each predetermined time interval. In one embodiment, the condition monitoring device 101 may set a timer for each predetermined time interval of one or more sensors. In particular, the vibration sensor 204 is configured to monitor the placement of the device 101 relative to the rotating apparatus based on the condition to measure a signal corresponding to the measurement position of the vibration sensor. In one embodiment, the measurement location is where the condition monitoring device 101 is mounted on a rotating device. More specifically, the position is the position of one or more sensors within the housing body 103 of the condition monitoring device 101 when the condition monitoring device 101 is attached to the rotating device. In one embodiment, condition monitoring device 101 may be positioned differently for measurement. In one embodiment, if no vibration is detected in the rotating device, the condition monitoring apparatus 101 detects that the rotating device is in a stopped state and the timer is set to the next predetermined time interval.

At block 403, once the presence of vibration is detected in the rotating device, the method includes obtaining a predetermined number of samples associated with the vibration from the vibration sensor 204. A predetermined number of samples are acquired at a first frequency. In one example, the predetermined number of samples may include sixty-four samples, twenty-eight samples, and so on. It will be appreciated by those skilled in the art that in the present disclosure, the number of samples is configurable. In one example, the first frequency may be two kilohertz. One skilled in the art will appreciate that the first frequency for collecting a predetermined number of samples may be based on the rotating device and may be configurable in the present disclosure. In one embodiment, the predetermined number of samples associated with the vibration includes an acceleration value of the rotating device during the vibration.

At block 405, the method includes calculating an RMS value of the vibration based on a predetermined number of samples. In one embodiment, the RMS value is defined as the square root of the average of the square values of the waveform. In one embodiment, the RMS value of the vibration can be calculated by any known prior art technique.

At block 407, the method includes comparing the calculated vibration RMS value to a reference value calculated for a predetermined period of time. In particular, if the rotating means are operated at a variable frequency, the reference value of the vibration may vary over time. Therefore, the reference value is calculated every predetermined period of time to improve the accuracy of detection of the running state of the rotating device.

Based on the comparison, an operating state of the rotating device is detected. In one embodiment, the operational state of the rotating means comprises information about one or more starts of the motor and one or more stops of the rotating means in each predetermined time interval of the predetermined time period. For example, if it is determined that the calculated RMS value is greater than the reference value, the operation state is detected as the startup state. In one embodiment, to determine the activation of the rotating device, the magnitude of the RMS value may be increased rapidly when the rotating device begins to operate. Such signal characteristics are easily detected. The detection of the activation of the rotating means is realized on the basis of a reference value. When the magnitude of the RMS value is greater than the reference value, the rotating device is considered to be activated.

In a similar manner, stop detection of the rotating device may be performed. In one embodiment, the magnitude of the RMS value may be reduced when the rotating device is not operating. This signal characteristic is distinct and easily detectable, as in the case of the activation of the rotating means. The detection of the stopping of the rotating means is also carried out on the basis of a reference value. When the magnitude of the RMS value is smaller than the reference value, the rotating device is considered to be stopped.

At block 409, the method includes storing the operating conditions detected for the rotating device in memory 201 at each predetermined time interval. FIG. 5 illustrates an exemplary graph representing an operating state of a rotary device apparatus according to an embodiment of the disclosure. Fig. 5 is a graph recording the motor operating state. In this example, the chart records the motor for a predetermined period of one hour and a predetermined interval of two and a half minutes. Thus, the operational status is detected by the monitoring device 101 every 2.5 minutes and stored as bit information in a 24-bit format, wherein one bit corresponds to 2.5 minutes. Thus, if the motor is in the on state, the value of this bit is "1", otherwise it is zero. Thus, a minimum start/stop interval of 2.5 minutes can be detected. Thus, at the end of each predetermined time interval, the bit values may be taken into account to determine the operating state. For example, consider whether the user sets the predetermined period of time to 30 minutes. In this case, the operating state of the motor can be determined using 12 bits. In addition, if the user sets the predetermined period of time to be greater than 1 hour, the 24 bits may be modified to fill the interval. For example, if the predetermined period of time is 2 hours, 24 bits of information may be recorded every 5 minutes. In one embodiment, the condition monitoring device 101 may count the predetermined time interval by incrementing a counter every predetermined time (e.g., ten seconds). For example, if the predetermined period of time is one hour, a predetermined time interval of 2.5 minutes is counted by a counter, and the counter is reset once the value reaches 15 (15 × 10 — 150 seconds — 2.5 minutes).

At block 411, the method includes processing each stored information for a predetermined time interval over a predetermined period of time to evaluate the state of the rotating device. In one embodiment, the information may further comprise one or more starts and one or more stops of the rotating device for a predetermined period of time. Such information may include the number of starts/stops, the number of starts/stops for a predetermined period of time, loading related information, and the like. The information is processed after each predetermined period of time to assess the state of the rotating device. Based on the processed information associated with each predetermined time interval and the processed information associated with the predetermined time period, the state of the rotating device is evaluated.

In one embodiment, server 301 may use the processed information associated with each predetermined time interval and predetermined time period to evaluate the state of the rotating device. The state may be associated with a health state and a state that requires maintenance and/or other support. For example, the condition monitoring device 101 may have a simple life estimation model (e.g., an empirical mathematical relationship) that starts/stops/changes to estimate remaining life and predict conditions that require maintenance. An example of a simple life estimation model may empirically represent life as a curve related to the number of starts specified by an average (mean) load value on a rotating device, and the condition monitoring apparatus 101 may use a mathematical expression relationship representing the curve to estimate/predict a time or condition of maintenance based on the value of the number of starts. Similarly, the condition monitoring apparatus 101 may also determine the maintenance condition in conjunction with the average time period between start and stop signals of the rotating device and the average load value.

Further, the method optionally comprises receiving information for assessing the status of the rotating device from the server 301 through the network interface 203 of the status monitoring apparatus 101. Specifically, a server 301 is in communication with the condition monitoring device 101, the server 301 receiving data measured by each of a plurality of sensors, the data being processed to assess the condition of the rotating equipment. For example, the server 301 may have one or several models to process data related to a single/several sensors of the condition monitoring device 101. Processing of data from multiple sensors may be used to determine the state of the rotating device. For example, consider a situation where a motor at a particular location may fail after being started/stopped a certain number of times. The analysis module at the server 301 can use this information and make correlations to detect the state of the motor 100. Further, the server 301 transmits the processed information to the status monitoring apparatus 101.

Thus, the condition monitoring device 101 can evaluate the condition of warranty service, maintenance, or maintenance planning. This may be done based on information already available to the device during configuration and information collected by its sensors/received from the server 301. The condition monitoring device 101 may also send raw data and/or processed data of the rotating apparatus to the server 301. At the server 301, information from the condition monitoring device 101 may also be collected, which may be used for various condition assessment and/or maintenance planning activities.

The present invention provides various advantages. Information associated with the operational state (such as start, stop) may be used as input to one or more life estimation models at the state monitoring device 101 (and/or life estimation model(s) at the server). The condition monitoring device 101 utilizes information associated with start-up, stop-down to predict conditions that require maintenance and/or other support. Communications (e.g., communications through a server, communications through a status monitoring device, etc.) for triggering an action (e.g., scheduling maintenance, etc.) may be sent based on the processed information.

This written description uses examples to describe the subject matter herein (including the best mode) and also to enable any person skilled in the art to make and use the subject matter. The patentable scope of the subject matter is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have no structural elements that differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.

Reference numerals

Reference number of	Description of the invention
		100	Motor
101	State monitorEquipment for testing
		103	Shell main body
201	Memory device
		202	Processor with a memory having a plurality of memory cells
203	Network interface
		204	Vibration sensor
205	Magnetic field sensor
		206	Other sensors
207	Antenna with a shield
		301	Server