JP2019066230A - Rotary instrument-purpose monitoring device, and plant maintenance method using the same - Google Patents

Abstract

To achieve a rotary instrument-purpose monitoring device that improves a degree of attachment freedom with easy installation, does not need a wiring work to an individual device at any portion, and results in being installable inexpensively.SOLUTION: A rotary instrument-purpose monitoring device, which includes: one or more slave machines that is or are installed in the vicinity of each of one or more rotary instruments; and a master machine to which data from the one or more slave machines is distributed, comprises: an oscillation sensor that measures oscillation or sound from the rotary instrument in the vicinity of an installation portion of the slave machine; a temperature sensor that measures a vicinity temperature of the rotary instrument; and data distribution means that distributes the measured data to the master device via a radio line. The master machine comprises: data reception means that receives distribution data from the slave machine; recording means that records and accumulates the distribution data received from the slave machine; and monitoring means that compares the distribution data received from the slave machine with past data recorded and accumulated in the recording means, and detects presence or absence of abnormality.SELECTED DRAWING: Figure 1

Description

  The present invention relates to, for example, a monitoring device for a rotating device and a plant maintenance method capable of verifying a failure state before failure of a rotating device such as a motor or a gear installed in many in a large scale plant or plant. .

  A large number of rotating devices such as motors and reduction gears are used in automobile parts manufacturing lines, pumps of sewage treatment plants, and many other industrial equipment plants. In many plants and the like, rotating devices (power transmission devices) such as motors and reduction gears are used as a part of many components constituting equipment and lines and the like, and cost reduction is inevitable. In addition, when one or more of these rotating devices have a problem and are shut down, the facilities and lines themselves may be shut down, and a large loss may occur depending on the size of the plant.

  Furthermore, if there is no alternative to rotating equipment, it will be ordered from the manufacturer and ordered, but if it is an old machine, the component parts will be out of stock and the delivery date may take more than half a year. Even in some cases, "rotational equipment" that is constantly loaded requires regular maintenance, and it is important to detect abnormal conditions and their symptoms. In addition, there may be a situation where expensive monitoring devices can not be added to the reduction gears and motors that are forced to reduce costs.

  However, recently, there is a shortage of skilled engineers who inspect equipment, and losses due to such equipment stoppages have become widespread throughout the country. Therefore, it has been proposed to provide a method and apparatus for accurately diagnosing the determination of the abnormal part and the determination of the degree of abnormality occurring in the variable speed rotary machine equipment using vibration (see, for example, Patent Document 1) . Furthermore, even if the sound and vibration data to be analyzed is buried in background noise or disturbance, a method has been proposed that can accurately diagnose the target equipment (see, for example, Patent Document 2).

Japanese Patent Application Laid-Open No. 10-26580 Unexamined-Japanese-Patent No. 2004-20193

  However, if there are a large number of corresponding monitoring devices for rotating equipment, they must be installed on all the rotating devices, and naturally, a plurality of monitoring devices are required. In addition, wiring work will be required for each monitoring device. In addition, it is necessary to compare data from individual monitoring devices over time and over time.

  Therefore, the installation itself of a plurality of monitoring devices becomes a bottleneck because it is expensive, and the current situation is that the introduction has not progressed except for some major companies. In addition, modern Japan should go on the way to collect fault and normal data and turn it into big data, and the current situation of each company seems to be the early days of equipment analysis.

  An object of the present invention is to provide a monitoring device for a rotating device which can be easily installed, has a high degree of freedom of attachment, and does not require wiring work to individual devices at any places, and consequently can be installed inexpensively. I assume. Another object of the present invention is to obtain a plant maintenance method capable of verifying a failure state before failure by maintaining the plant using the rotating device monitoring device.

The monitoring device for a rotating device according to the invention described in claim 1 comprises one or more handsets installed near each of one or more rotating devices, and data from the one or more handsets A monitoring device for a rotating device comprising a parent device to be distributed, the monitoring device comprising:
The slave unit
A vibration sensor that measures vibration or sound from a rotating device near the installation location;
A temperature sensor that measures the temperature near the rotating device;
Data delivery means for delivering the measured data to the parent device via a wireless circuit;
The parent device
Data receiving means for receiving distribution data from the slave device;
Recording means for recording and accumulating the received distribution data from the child device;
It is characterized by comprising monitoring means for comparing the received distribution data from the child device with the past data recorded and accumulated in the recording means, and detecting the presence or absence of an abnormality.

  The monitoring device for a rotating device according to the invention described in claim 2 is characterized in that the slave device according to claim 1 further comprises a battery as a drive source.

  In the monitoring device for a rotating device according to the invention described in claim 3, the slave unit according to claim 1 or 2 further comprises timer means and drive control means for intermittently driving the slave unit. It is characterized by

A plant maintenance method using the monitoring device according to the invention described in claim 4 is a plant maintenance method using the monitoring device according to any one of claims 1 to 3,
A monitoring device for a rotating device comprising one or more slaves installed near one or more rotating devices in a plant, and a master device to which data from the one or more slaves is distributed In the plant maintenance method,
Vibration data or sound data and temperature data of rotating equipment near the installation location are measured by the vibration sensor and the temperature sensor of the slave unit, and the data measured by the data distribution means is distributed to the master unit ,
The recording means of the master unit records and stores distribution data from the slave unit, and the distribution data from the slave unit is compared with the past data recorded and accumulated by the recording means, and the monitoring means It is characterized in that a test signal indicating that a slave unit whose data of a predetermined frequency exceeds a predetermined threshold should be checked is transmitted.

  The present invention makes it easy to install and increase the freedom of installation to a large number of rotating equipment facilities by a slave unit, and does not require wiring work to individual devices at any place, resulting in low cost. There is an effect that it is possible to obtain a monitoring device for rotating equipment that can be installed. In addition, maintenance of rotating equipment in the plant using these monitoring devices makes it possible to verify the failure state before failure.

It is an explanatory view showing the composition of the child machine of the monitoring device for rotation devices of one example of the present invention. It is explanatory drawing which shows the structure of the main body of the monitoring apparatus for rotary machine machines of FIG. It is a system configuration figure showing composition of a simple system of a child machine of a monitoring device for rotation machines of another example of the present invention, and a main machine.

  In the present invention, for a rotating device provided with one or more handsets installed in the vicinity of each of one or more rotating devices, and a master device to which data from these one or more handsets is distributed In the monitoring device, the slave unit measures the vibration or sound from the rotating device near the installation location, the temperature sensor measures the temperature near the rotating device, and the measured data is wirelessly connected to the master unit Received by the master unit, the data reception unit for receiving distribution data from the slave unit, the recording unit for recording and accumulating the received distribution data from the slave unit, and And monitoring means for comparing the distribution data from the slave unit with the past data recorded and accumulated in the recording means and detecting the presence or absence of abnormality. As a result, installation of the child machine is easy and the degree of freedom of installation is increased, and it is possible to obtain a monitoring device for a rotating device which can be installed at low cost as a result without requiring wiring work to individual devices at any places. Can. That is, since the data from the slave unit is transmitted not by wire but by wireless circuit, it can be arranged at the plant currently in operation.

  The slave unit of the present invention includes a vibration sensor that measures vibration or sound from the rotary device near the installation location, a temperature sensor that measures the temperature near the rotary device, and data distribution that distributes the measured data to the master unit And means may be provided. Note that the function of the slave unit may be improved, or another sensor may be provided according to the rotating device to be monitored in the vicinity of the installation location.

  The vibration sensor according to the present invention may be any sensor that measures vibration or sound, and a 3-axis vibrometer or a piezoelectric or servo accelerometer may be used. It is also possible to use as a vibration sensor a microphone that can convert audible data of the frequency range (20 to 20,000 Hz range) and low frequency vibration below that and the high frequency vibration higher than that into electric signals and sense it as it can.

  As a temperature sensor of the present invention, what is necessary is just to measure the temperature in the vicinity of the rotary device in which the child machine is installed, and it is sufficient to measure the temperature of the installation location. Moreover, what measures the external temperature of an installation place simultaneously is more preferable, and if the temperature difference of external temperature and an installation location is known, since the heat quantity which a rotation apparatus emits is analogized, it is more preferable.

  As data distribution means of the present invention, distribution data obtained by combining vibration signal data or sound signal data from a rotating device measured by a vibration sensor with temperature data measured by a temperature sensor is used as the data reception means of the master unit. What is necessary is just to distribute via a wireless line. As a wireless circuit, it is possible to use a WiFi circuit (wireless LAN circuit) in a frequency band of 2.4 GHz and 5 GHz or a short distance wireless communication such as Bluetooth (registered trademark) as a wave number band.

  As a master unit of the present invention, data reception means for receiving distribution data from a slave unit, recording means for recording / accumulating distribution data from the slave unit received, and distribution data from the slave unit received What is necessary is to have a monitoring means for comparing the past data recorded and accumulated in the recording means and detecting the presence or absence of abnormality.

  As a preferable data receiving means, a unique address is allocated to each of one or more slaves, delivery data from each slave is received, and delivery data received from each slave is recorded. It should be something to pass to

  As a preferable recording means, a recording area to be recorded and accumulated for each slave unit may be created, and distribution data received from each slave unit may be recorded and accumulated in each recording area together with a delivery date.

  As a preferred monitoring means, the intensity distribution according to the wavelength or frequency of the past distribution data recorded and accumulated in the recording means is compared in time series, and the wavelength region or frequency region of the gradually changing vibration or sound is Watch carefully, set a threshold in advance for the intensity of the wavelength or frequency domain you watched, and check the corresponding handset if the received distribution data from the handset exceeds this threshold What is necessary is just to transmit the inspection signal that should be done. As this monitoring means, AI may be used, and further, an existing determination method may be used. For example, the methods shown in Patent Document 1 and Patent Document 2 may be used.

  In a preferred embodiment of the slave unit according to the present invention, the slave unit further includes a battery as a drive source, so that power is supplied to the slave unit not from the external power supply but by the mounted battery to drive the slave unit. Not only is it unnecessary, but the installation of the slave unit is easy, the degree of freedom of installation is increased, and there is no need to pick up power supply noise mixed in the external power supply. The influence of power supply noise can be reduced as much as possible.

  Further, as a further preferable aspect of the slave according to the present invention, the slave further includes a timer means and a drive control means for intermittently driving the slave. As a result, since it is possible to intermittently drive the child device, power consumption can be reduced. In particular, when a battery is provided as a drive source of a slave unit, the battery life can be significantly extended, for example, to such an extent that the internal power supply can be replaced once every three months. It is also possible to extend the life of the The timer means and the drive control means may be achieved by mounting a device (for example, a deep sleep circuit device etc.) which combines these means into one in a slave unit.

  In addition, as a battery as a drive source of a child machine, it may be a dry battery to be replaced when the life of the mounted battery is over, or a rechargeable battery that can be charged when the life of the mounted battery is over May be. When the power of the mounted battery is reduced, a switchable circuit and a spare battery may be mounted.

  In the present invention, monitoring for a rotating device comprising one or more handsets installed in the vicinity of one or more rotating devices in a plant, and a master device to which data from these one or more handsets is distributed In a plant maintenance method using an apparatus, data measured by data distribution means by measuring vibration data or sound data and temperature data of a rotating device in the vicinity of the installation location by the vibration sensor and the temperature sensor of the slave unit Is distributed to the master unit, and the distribution means from the slave unit is recorded and accumulated by the recording means of the master unit, and compared with the distribution data from the slave unit and the past data recorded and accumulated by the recording means, the monitoring means And a test signal indicating that the data of the frequency determined in advance should inspect the slave unit exceeding the predetermined threshold value. For this reason, by maintaining the rotating equipment in the plant, it is possible to verify the failure state before the failure.

  FIG. 1 is an explanatory view showing a configuration of a slave unit of a monitoring device for a rotary device according to an embodiment of the present invention. FIG. 2 is an explanatory view showing a configuration of a parent machine of the monitoring device for a rotary machine shown in FIG. FIG. 3 is a system configuration diagram showing a simplified system configuration of a slave unit and a master unit of a monitoring device for a rotary machine according to another embodiment of the present invention. As shown in the figure, the monitoring device for a rotating machine according to this embodiment includes one or more slaves 10 shown in FIG. 1 installed near each of one or more rotating devices in the plant, And a master unit 20 shown in FIG. 2 to which data from the slave unit 10 is distributed.

  As shown in FIG. 1, the child device 10 measures the temperature near the rotating device by the ground terminal 12a and the vibrometer 11 as a vibration sensor that measures vibration or sound from the rotating device near the installation location by the ground terminal 11a. It comprises a thermometer 12 as a temperature sensor, and a data delivery means 13 for delivering the measured data to the parent device via a wireless circuit. With this configuration, installation of the slave unit 10 is easy and the degree of freedom of installation is increased, and a monitoring device for a rotating device which can be installed at low cost as a result without requiring wiring work to individual devices at any places It offers the advantages that can be obtained.

  In addition, the slave unit 10 includes a battery unit 14 as a battery serving as a driving source. The battery unit 14 includes a lithium ion battery 14a that can be charged from an external DC power supply unit 14d, a spare battery 14c, and a switching circuit 14b between the lithium ion battery 14a and the spare battery 14c. With this configuration, power is supplied to the child device 10 using a battery to drive the child device 10. Not only is power distribution unnecessary, but the child device 10 can be easily installed and the freedom of attachment is increased. The present invention has the advantage of being able to minimize the influence of the power supply noise on the mounted vibration sensor, temperature sensor and data distribution means without picking up the power supply noise mixed in the power supply.

  Switching between the lithium ion battery 14a and the spare battery 14c by the switching circuit 14b of the battery unit 14 is performed by setting the preset remaining amount while measuring the voltage of the power supply unit 14 while the slave unit 10 is being driven by the battery alert circuit 16. When it falls below the value, it switches to the spare battery 14c and sends an instruction to the control circuit 17 to issue an alert.

  In addition, the slave 10 includes a deep sleep (DEEP SLEEP) circuit device 15 as drive control means. The deep sleep circuit device 15 intermittently drives the slave 10 by means of an internal timer means, thereby intermittently driving the slave only during a preset period. Power consumption can be significantly reduced. This makes it possible to significantly prolong the driving life of the battery unit 14 and, for example, it is also possible to prolong the life of the battery to such an extent that the internal power supply can be replaced once every three months. . Further, not only the deep sleep circuit device but also the sleep means in which the timer means and the drive control means are combined can perform the intermittent drive similarly. For example, for the drive of the slave unit for one second, the sleep state of the drive may be performed for the drive of the slave unit at regular intervals, such as sleep for 9 seconds.

  Further, the slave unit 10 of the present embodiment is provided with a control circuit 17 for recording and executing setting instruction data. In this control circuit 17, data acquisition timer setting, data transmission timer setting, threshold setting, deep sleep setting, battery alert setting, ID management setting, dedicated wireless circuit conversion setting and the like are recorded in the internal memory function. Further, the slave unit 10 of the present embodiment is also provided with external input means 18 for receiving setting data to which various settings are distributed from the master unit 20. That is, various settings recorded in the memory function of the control circuit 17 can be changed by distribution from the parent device 20.

  A noise filter device 19 may be attached to the slave unit 10 of the present embodiment in accordance with the external condition to remove noise. In addition, regarding removal of the noise, the method of grounding the child machine securely, adopting measures such as wrapping the child machine itself with lead foil, etc., or applying electrostatic coating as a measure not to be affected by static electricity May be

  As shown in FIG. 2, as the parent device 20, a wireless receiver 22 as data receiving means for receiving distribution data from the child device 10 connected to the PC 21 as a control device, and a receiver provided in the PC 21 The recording means 23 for recording and accumulating the distribution data from the slave unit 10, and the received distribution data from the child unit 10 arranged in the PC 21 are compared with the past data recorded and accumulated in the recording means 23 And monitoring means 24 for detecting the presence or absence of an abnormality.

  The PC 21 further controls the wireless receiver 22 and the wireless oscillator 26 according to the PC transmission / reception setting, and records and controls distribution data and past distribution data in the recording unit 23 according to the memory function setting. And control means 25 for confirming the ID of one or more handsets 10 along the wireless channel conversion setting. The wireless oscillator 26 distributes setting data to the external input means 18 of the slave 10.

  More specifically, the PC 21 performs master device command input and ID management operation of the slave device 10 as management operations in the control means 25, normal data accumulation operations as the AI analysis / prediction function in the monitoring means 24, Abnormal data accumulation operation, machine learning of normal data and abnormal data, failure time prediction, life prediction, nonoptimal prediction, environmental relative effect estimation, etc. are performed.

  As described above, the slave unit 10 of this embodiment includes the control circuit 17 for recording and executing the setting instruction data. However, in order to reduce the cost, the control circuit 17 is omitted and the master unit 20 is omitted. The power supply unit may also be driven with a wireless command as a trigger, or the power supply unit may be replaced with a dry cell battery, and the power supply unit may be composed of a dry cell battery and a spare battery periodically. Alternatively, when the voltage of the dry battery falls below the threshold, the battery may be switched to a spare battery, and when switched, an alert command may be added to the distribution data to replace the dry battery.

  As an example of the simple configuration of the slave unit, a timer unit, a drive control unit for intermittently driving the slave unit, a vibration sensor, a temperature sensor, a measuring unit for measuring the remaining amount of the battery, a vibration sensor And data distribution means for distributing data from the temperature sensor and the measurement means for measuring the remaining amount of the battery to the master via the wireless circuit, and more preferably, the drive is performed according to a command from the master An oscillation circuit is provided as an external input unit to be driven.

  In this simple slave unit, as shown in FIG. 3, a command is issued from the transceiver of the master unit to the slave unit of the target ID in accordance with an instruction from the PC of the master unit. One command is a command instructing a state of a slave unit, for example, a sleep command to sleep for several minutes to several hours, a deep sleep command for deep sleep for several hours, or data collection Command to For example, according to a data collection command, each vibration data, temperature data, and battery residual amount data are read from the vibration meter, thermometer and battery of the slave unit, and the data is temporarily stored.

  As a specific example of the operation of the slave unit, it is sufficient to measure temperature and vibration for 1 second to 5 seconds in one measurement. Also, the measurement period may be performed after the sleep instruction or the deep sleep instruction other than when the instruction is issued. These may be set by the operating time of the installed plant. For example, a sleep instruction or a deep sleep instruction may be issued so as to instruct data collection at the plant operation time depending on whether it is night operation or not, from Monday to Sunday. In the sleep state in this embodiment, the power supply of the vibrometer, thermometer, and battery data collection system of the slave unit is cut off, and in the deep sleep state, only the command from the master unit is supported. Power supply only. Therefore, the deep sleep state may have power consumption of 1/100 or less of that in the sleep state. In addition, after data is immediately distributed after measurement, battery consumption can be suppressed by switching to the sleep state again.

  The next command is a command to transmit temporarily stored data, and distributes temporarily stored vibration data, temperature data, and battery residual amount data from the oscillator circuit to the transmitter / receiver of the master unit. Note that the oscillation circuit creates distribution data in which the ID number of the slave unit is added to the temporarily stored vibration data, temperature data, and battery residual amount data, and checks whether it has arrived at the master unit at the transmission check circuit. If not, send again. As another command, there is a command to issue an alert command when the remaining amount based on the battery remaining amount data falls below a preset threshold value in the previous distribution data. As an alert, an alarm sound is emitted from a speaker mounted on a slave unit, and an instruction is issued to blink an LED.

  Further, the battery capacity of the slave unit may be determined by the number of times of measurement of temperature and vibration and the number of times of transmission. A circuit for measuring the remaining battery level may be provided on the slave unit, and the remaining battery level may be always transmitted to the master unit. The master unit may issue a command by judging whether to sound an alarm based on the remaining amount report from the slave unit. Preferably, the slave unit may be equipped with a memory-enabled IC that can read commands from the master unit. This makes it possible to temporarily store data in memory when immediate transmission is not possible. The temporary memory of the handset can be supported by at least 32 KB.

  With regard to the master, it is only necessary to check whether the IDs of the slaves match, and to receive data only for the matching ID. The master unit may receive the distribution data from the slave unit in the order according to the measurement time and the transmission time of the slave unit set in advance. Further, the PC of the parent machine may judge the temperature and vibration measurement range, and if it is out of the range, it may be configured to receive from the PC a command to issue a buzzer and an LED blink command to the child machine.

  The theoretical value of the wireless effective distance between the slave unit and the master unit is 100m, but it varies depending on the use environment and the structure. For one master, the maximum number of slaves is 500 theoretical values. Preferably, in the case of inputting a transmission command from the master unit to the slave unit, it is better to be configured so as to grasp to which slave unit the ID unit has issued the command. Even if a leak occurs in data transmission, the master unit can be identified, so the transmission command is issued again to the ID that could not be received. As described above, the monitoring device for a rotating device according to the present invention has the advantage that no wiring work is necessary and the introduction cost is low because of cordlessness. In addition, when using a battery as a drive source of the slave unit, not only the distribution work is not necessary, but also the slave unit can be easily installed and the freedom of installation is increased, and power supply noise mixed in the external power supply is picked up I have not. Furthermore, in order to maintain the function of the battery for a long time, the battery is intermittently operated.

10 ... child machine,
11a ... ground terminal,
11 ... Vibration meter (vibration sensor),
12a ... ground terminal,
12 ... thermometer (temperature sensor),
13 ... data delivery means,
14 ... Battery unit (battery),
14a ... lithium ion battery,
14b ... switching circuit,
14c ... spare battery,
15 ... Deep sleep circuit device (drive control means, timer means),
16 ... battery alert circuit,
17 ... Control circuit,
18 ... External input means,
19 ... noise filter device,
20 ... parent machine,
21 ... PC,
22 ... Wireless receiver,
23 ... recording means,
24 ... monitoring means,
25 ... control circuit,
26 ... radio oscillator,

Claims (4)

A monitoring device for a rotating device comprising: one or more handsets installed near each of one or more rotating devices; and a master device to which data from the one or more handsets is distributed ,
The slave unit
A vibration sensor that measures vibration or sound from a rotating device near the installation location;
A temperature sensor that measures the temperature near the rotating device;
Data delivery means for delivering the measured data to the parent device via a wireless circuit;
The parent device
Data receiving means for receiving distribution data from the slave device;
Recording means for recording and accumulating the received distribution data from the child device;
A monitoring device for a rotating device, comprising: monitoring means for detecting the presence or absence of abnormality by comparing the received distribution data from the child device with the past data recorded and accumulated in the recording means. .   The monitoring device for a rotating device according to claim 1, wherein the slave unit further includes a battery as a driving source.   The monitoring device for a rotating device according to claim 1 or 2, wherein the slave unit further includes a timer unit and a drive control unit for intermittently driving the slave unit. A plant maintenance method using the monitoring device according to any one of claims 1 to 3,
A monitoring device for a rotating device comprising one or more slaves installed near one or more rotating devices in a plant, and a master device to which data from the one or more slaves is distributed In the plant maintenance method,
Vibration data or sound data and temperature data of rotating equipment near the installation location are measured by the vibration sensor and the temperature sensor of the slave unit, and the data measured by the data distribution means is distributed to the master unit ,
The recording means of the master unit records and stores distribution data from the slave unit, and the distribution data from the slave unit is compared with the past data recorded and accumulated by the recording means, and the monitoring means A plant maintenance method using a monitoring device for a rotating device, comprising transmitting an inspection signal indicating that a slave unit whose data of a predetermined frequency exceeds a predetermined threshold should be inspected.

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