JP4791804B2 - Motor bearing wear monitoring system - Google Patents

Description

  The present invention relates to a bearing for judging the life of a bearing based on motor bearing wear data output by a bearing wear monitoring device provided in a machine such as a canned motor pump, and performing maintenance of the bearing systematically. The present invention relates to a wear monitoring system.

  Conventionally, a chemical plant that handles harmful liquids with a pump requires a completely sealed pump, and therefore, a canned motor pump in which a pump and a motor are integrated and sealed has been applied.

  FIG. 6 is a partially broken side view showing a schematic structure of a general canned motor pump. In the figure, a canned motor pump 101 includes a pump unit 102 and a motor unit 103, and the pump unit 102 and the motor unit 103 are connected to each other by an adapter 104 so as to be compatible with each other.

  The pump section 102 has a suction pipe section 107 and a discharge pipe section 108 communicating with each other in a pump chamber 106 in which the impeller 105 is disposed. The impeller 105 is an extension terminal on one end side (right side in FIG. 6) of the rotating shaft 109. Is attached.

  On the other hand, the motor unit 103 includes a rotor 110 that is coaxially attached to the rotary shaft 109 and a stator 112 that is attached to the inside of the motor housing 111 so as to surround the rotor 110. A rotating shaft 109 that rotates integrally with the rotor 110 is rotatably supported by a bearing 113 on one end side and a bearing 114 on the other end side. A front rotating chamber 115 and a rear rotating chamber 116 are formed at both ends of the rotor 110.

  A part of the handling liquid is introduced into the rear rotating chamber 116 from the discharge pipe part 109 of the pump unit 102 by an external conduit (not shown), and the bearing 114 is lubricated and the motor part 103 is cooled by the handling liquid. Further, the adapter 104 is provided with a fluid passage that communicates the front rotary chamber 115 and the low pressure side of the pump portion 102, and lubrication of the bearing 113 and the motor portion 103 are performed by the handling liquid that passes through the fluid passage. Cooling takes place.

  Further, in this type of canned motor pump 101, since the bearings 113 and 114 for supporting the rotating shaft 109 are carbon sliding bearings, they are worn according to the usage time. Therefore, the other end side (left side in FIG. 6) of the motor unit 103 is provided with a bearing wear monitoring device 117 for detecting the degree of wear of the bearings 113 and 114.

  Such a bearing wear monitoring device 117 is disclosed in, for example, Patent Document 1, and FIG. 7 is a cross-sectional view of a main part of the bearing wear monitoring device 117. In the figure, a bearing wear monitoring device 117 includes a terminal box 118 provided in a standing state on the other end side of the motor unit 103, and a lid 119 that closes the upper surface opening of the terminal box 118. .

  The terminal box 118 is formed in a substantially cylindrical shape, and a plurality of terminals 121 extending in the plate thickness direction are embedded in the glass sealed terminal plate 120 provided therein. One end of each terminal 121 (lower side in FIG. 7) is connected to one end of an electric wire connected to a coil for detecting the wear state of the bearings 113 and 114, a thermostat for temperature detection, or the like. On the other hand, the other end of each terminal 120 (upper side in FIG. 7) is connected to an external power line (power Cable) 123, a signal processing circuit provided in the lid 119, a signal line 126 connected to a printed circuit board 125 on which a transformer 124 is mounted, and the like.

  In addition, a display board 127 for displaying the wear state of the bearings 113 and 114 is provided on the upper part of the printed circuit board 125 arranged in the lid 119. A plurality of LEDs (light emitting diodes) 128 that are lit in response to wear in the thrust direction and radial direction of the bearings 113 and 114 are arranged below the display plate 127. As shown in FIG. 8, the LED 128 is composed of a bearing wear display LED 128A in the thrust direction and a bearing wear display LED 128B in the radial direction. The wear state of the bearings 113 and 114 in the thrust direction and the radial direction can be visually recognized through the glass window 129 from the outside.

  A light emitting element 130 and a light receiving element 131 for adjusting a detection signal detected by the detection coil by remote operation from the outside of the bearing wear monitoring device 117 through the glass window 129 from the outside of the display plate 127 are also provided. It is arranged. Optical transmission / reception of signals (for example, infrared transmission / reception) is performed between the light emitting element 130 and the light receiving element 131 and the external device 132 disposed above the glass window 129. The external device 132 is a PC (personal computer). Are connected to the information processing terminal 133 by a serial communication method such as RS232C (Recommended Standard 232 version C).

Japanese Patent Laid-Open No. 2000-308312

  However, in the conventional bearing wear monitoring system, in order to monitor the wear state of the bearings provided in the plurality of canned motor pumps 101, the number of display lights of the LED 128 is checked by looking into the glass window 129 of each bearing wear monitoring device 117. Had to be visible. Therefore, in a plant where a large number of canned motor pumps 101 are arranged, it is difficult to grasp the wear state of the bearings of the canned motor pumps 101.

  In addition, in the conventional bearing wear monitoring system, since monitoring is performed based on the number of LEDs 128 lit, it is difficult to examine the replacement timing of the bearing, and even a bearing that can still be safely operated is forced to be replaced early. It was. Accordingly, there has been a demand for a bearing wear monitoring system that can manage the trend of the wear state of the bearing among users and can perform planned maintenance.

  Therefore, the present invention has been made in view of the above circumstances, and the object of the present invention is to trend-control the wear state of the bearing based on the wear data of the bearing taken in from the bearing wear monitoring device of the motor. At the same time, it is an object of the present invention to provide a bearing wear monitoring system for a motor capable of performing planned maintenance by judging the life of the bearing.

The object of the present invention is to provide one or a plurality of motors having bearings for rotatably supporting a rotating shaft, and to monitor the wear of the bearings and to monitor the wear data of the bearings. And an information terminal for taking in the wear data output from the bearing wear monitoring device and monitoring the wear state of the bearings of the one or more motors. A wear data receiving means for receiving the wear data output from the bearing wear monitoring device, a management ledger registration means for registering the wear data in a management ledger for each of the one or more motors, Display means for displaying the wear state of the bearing based on the wear data; and bearing life judgment means for judging the life of the bearing based on the wear data; And a bearing life warning means for outputting a warning when the bearing is determined to be life by the bearing life determining means, said display means, the display data registered in the management register A management ledger display function that is registered in the management ledger based on the wear data, an individual characteristic display function that displays the time-wear characteristics of the bearing for each of the one or more motors based on the wear data, and A multi-characteristic display function for displaying the time-wear characteristics of the bearing of one or a plurality of motors, and a bearing life warning display function for displaying the presence or absence of a warning based on a warning signal output from the bearing life warning means. This is achieved by providing.

The above-described object of the present invention, the one or more motors, more it is canned motor having a bearing for rotatably supporting a rotary shaft connected to the impeller, or the wear data, of the bearing Including the wear data in the thrust direction, the wear data in the radial direction of the bearing, the rotation direction data of the rotating shaft, and the operation time data of the one or more motors, or the information terminal may include the bearing By providing a detection signal resetting means for outputting a reset signal for performing reset adjustment of the detection signal by the wear monitoring device, or data communication between the bearing wear monitoring device and the information terminal is performed by the bearing wear. By being performed via a wired cable connecting the monitoring device and the information terminal, or the bearing wear monitoring device and the information Data communication between the end, together with the a bearing wear monitoring device and capable of light transmission and reception, by which is performed through the data communicator is capable detachably connected to the information connected connection cable to the terminal, Achieved more effectively.

  According to the motor bearing monitoring system of the present invention, the information terminal takes in the wear data of one or a plurality of motor bearings from the bearing wear monitoring device, and manages the wear state of each bearing based on the wear data. It is like that. As a result, the life of each bearing can be judged from the degree of wear, so sudden maintenance is unnecessary, maintenance can be performed systematically, and the wear state of the bearings of multiple motors Can be centralized and grasped. As a result, the reliability of the motor can be improved, and the workability for monitoring the wear state of the bearing can be improved.

  Further, according to the motor bearing monitoring system of the present invention, the progress of wear of each bearing can be grasped in detail, and the replacement time of the bearing can be predicted based on the wear data of each bearing. This eliminates the need for regular maintenance that has been performed in consideration of safety aspects of bearings that can be operated safely in the past, and can reduce maintenance costs.

  Further, according to the bearing monitoring system for a motor according to the present invention, the information terminal can receive not only the wear data in the radial direction and the thrust direction of the bearing but also the rotation direction data of the rotating shaft and the motor operation time data. It has become. Thereby, the wear state of the bearing can be monitored in more detail, and the safety of the motor can be improved.

  Furthermore, according to the bearing monitoring system for motors according to the present invention, the display means in the information terminal displays a management ledger in which bearing wear data is registered, and displays the bearing wear status for each motor. A function for displaying the wear state of the bearing of one or a plurality of motors registered in the management ledger, and a function for displaying the presence or absence of a bearing life warning. As a result, the bearing wear states of a plurality of motors can be comprehensively monitored, and the bearing wear states of each motor can be grasped in detail.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The motor bearing wear monitoring system according to the present embodiment is based on the bearing wear data detected by the bearing wear monitoring device 117 in the canned motor pump 101 shown in FIGS. 6 and 7. It is a system for monitoring the status. Therefore, the description about the structure of a canned motor pump and a bearing wear monitoring apparatus is abbreviate | omitted here.

[First embodiment]
FIG. 1 is an explanatory diagram schematically showing a bearing wear monitoring system for a motor according to a first embodiment of the present invention. In the figure, a canned motor 1 arranged in a plant or the like includes a canned motor 2 having a bearing that rotatably supports a rotating shaft connected to an impeller, and a bearing that monitors the wear state of the bearing of the canned motor 2. A wear monitoring device 3 is provided.

  The bearing wear monitoring device 3 is an electric wire that communicates the detected thrust direction and radial direction wear data of the bearing, rotation direction data of the rotating shaft of the canned motor 2, and operating time data of the canned motor 2 with the inside and outside of the terminal box 4. The information is transmitted to the information terminal 7 via the wired cable 6 drawn from the insertion hole 5.

  In this way, the information terminal 7 fetching data from one or a plurality of canned motor pumps 1 arranged in the plant performs bearing life diagnosis and the like based on each data, and each bearing A reset signal for performing reset adjustment and the like of the detection signal by the wear monitoring device 3 is transmitted via the wired cable 6 to the bearing wear monitoring device 3 that has acquired the data.

  FIG. 2 is a diagram showing a schematic configuration of a microchip provided in the bearing wear monitoring device 3. In the figure, the microchip 8 of the bearing wear monitoring device 3 detects the wear data in the thrust direction and radial direction of the bearing of the canned motor 2, the rotation direction data of the rotating shaft, and the operation time data, and outputs a detection signal. An input / output unit 10 connected to a detection means 9 such as a coil or a timer, a CPU 11 for controlling the operation of the bearing wear monitoring device 3, a memory 12 as a storage means, and a transmission / reception unit for transmitting / receiving to / from the information terminal 7. The transmission / reception unit 13 is connected to the information terminal 7 via the wired cable 6.

  In the memory 12, in addition to a program for controlling the operation of the microchip 8, machine number data (canned motor pump ID) assigned to each canned motor pump 1 and each data received from the detecting means 9 are stored. Has been. That is, the bearing wear monitoring device 3 sends wear data including wear in the thrust direction of the bearing, wear in the radial direction of the bearing, rotation direction of the rotating shaft, and operating time of the canned motor 2 from the transmission / reception unit 13 to the information terminal 7. The machine number data is also sent at the same time.

  FIG. 3 is a block diagram schematically showing the system configuration of the bearing wear monitoring system. In the figure, in the information terminal 7 of the bearing wear monitoring system according to the present embodiment, a control unit 14 that controls the information terminal 7 in an integrated manner, and the bearing wear monitoring device 3 and the wired cable 6 communicate with each other. Transmission / reception unit 15, a storage unit 16 for storing each received data, and a processing program unit 17 for executing various processes described later.

  The processing program unit 17 includes a management ledger registration means 19 for registering the received wear data in the management ledger 18 in the storage unit 16 for each canned motor pump 1 and the wear data registered in the management ledger 18. The bearing life for judging the life of each bearing based on the display means 21 for displaying the wear state of the bearing on the display device 20 connected to the information terminal 7 and the wear data registered in the management ledger 18. A determining means 22; and a bearing life warning means 23 for outputting a warning via the display device 20 connected to the information terminal 7 when the bearing life determining means 22 determines that the bearing is at the end of its life. And a detection signal reset means 24 for outputting a reset signal for performing a reset adjustment of the detection signal by the bearing wear monitoring device.

  A display device 20 and an input device 25 are connected to the information terminal 7 as peripheral devices. The input device 25 is an input device such as a keyboard or a mouse. In this bearing wear monitoring system, the machine number input of the canned motor pump 1 for obtaining wear data and the instruction input for obtaining wear data are obtained via this input device 25. Alternatively, a reset instruction input by the detection signal reset means 24 is executed. On the other hand, the display device 20 is an output device such as a CRT display or a liquid crystal display, and displays a bearing wear state by the display means 21 and a warning by the bearing life warning means 23 on the screen.

  The processing program unit 17 may be realized by dedicated hardware, or by loading a program for executing the processing of the processing program unit 17 into a memory. It may be realized.

  4A to 4E are diagrams showing examples of display screens of the display device 20 by the display means 21. FIG.

  FIG. 4A is a screen (main screen) that displays the presence or absence of a warning based on a warning signal or a caution signal output from the bearing life warning means 23 by the bearing life warning display function of the display means 21. In the figure, the boxes arranged on the left side of “normal”, “caution”, and “warning” are lit in “normal” in green, “caution” in yellow, and “warning” in red, respectively. That is, as a result of the diagnosis by the bearing life determination means 22, if there is no bearing in the caution area (area close to the bearing life limit point) and warning area (area reaching the bearing life limit point), “normal” Is lit in green, and “Caution” and “Warning” are not lit. On the other hand, if there is at least one bearing in the caution area or the warning area as a result of the diagnosis by the bearing life judging means 22, the “caution” yellow or the “warning” red is lit. In addition, the display of “management ledger”, “individual characteristics”, “multiple characteristics”, and “input screen” on the right side of the screen is a movement button (link) to four display screens described later.

  FIG. 4B is a screen (management ledger screen) for displaying data of all the canned motor pumps 1 registered in the management ledger 18 by the management ledger display function of the display means 21. In this management ledger screen, the machine number data (P-101, P-102, P-103,...) Of the canned motor pump 1 registered in the management ledger 18 and the bearings in each canned motor pump 1 are displayed. The wear state in the thrust direction and radial direction is displayed. As with the main screen of FIG. 4A, the wear state is also displayed in green when “normal”, yellow when “caution”, and red when “warning”. The box below the check column on the left side of the screen is for selecting whether or not to display the time-wear characteristic graph in the multiple characteristic display screen described later. Check the box.

  FIG. 4C is a screen (multiple characteristic display screen) for displaying the wear state of the bearing of one or more canned motor pumps 1 registered in the management ledger 18 by the multiple characteristic display function of the display means 21. . In this multi-characteristic display screen, the wear state of the bearings of one or a plurality of canned motor pumps 1 arbitrarily selected on the management ledger screen of FIG. 4B is displayed in a characteristic graph of time t-wear w. The time t is the operation time of the canned motor 2 acquired from each bearing wear monitoring device 3, and the wear w is the thrust wear or radial wear of the bearing acquired from each bearing wear monitoring device 3. Each graph is displayed using a different color for each machine number and S (thrust) / R (radial).

  FIG. 4D shows a screen (individual characteristic display) for individually displaying the wear state of the bearing for each one or a plurality of canned motor pumps 1 registered in the management ledger 18 by the individual characteristic display function of the display means 21. Screen). In this individual characteristic display screen, the wear state in the thrust direction or the wear state in the radial direction of the bearing of one arbitrarily selected canned motor pump 1 (here, in the thrust direction of the bearing of the canned motor pump bearing No. P-101) The wear state) is displayed in a characteristic graph of time t-wear w similarly to the multiple characteristic display screen of FIG. In the figure, the wear value w ′ is the upper limit point (the limit point of the bearing life) of the bearing replacement region, and the time t ′ is the upper limit point arrival time obtained by approximation such as the least square method. That is, in this embodiment, when the wear w of the bearing exceeds the wear value w ′, the bearing life determination means 22 determines that it is a warning area where the bearing needs to be replaced immediately, and the bearing life warning. A warning signal is output by the means 23. On the other hand, when the wear w of the bearing is between the wear value w ″ that is the lower limit point of the bearing replacement region and the wear value w ′, the bearing life determination means 22 is an optimal bearing replacement time. A bearing signal is output by the bearing life warning means 23. Based on these warning signals or caution signals, the display means 21 lights red or yellow on the main screen of FIG. 4A and the management ledger screen of FIG. 4B. Moreover, the lower limit point arrival time t ″ of the bearing replacement region and the upper limit point arrival time t ′ of the bearing replacement region can be predicted by approximating the wear state of the current bearing by the least square method or the like. The wear w ′ and the wear w ″ can be arbitrarily changed using the input device 25 or the like. Further, the threshold value of time t displayed on the multi-characteristic display screen and the individual characteristic display screen can be arbitrarily changed using the input device 25 or the like.

  FIG. 4E shows a command for inputting a machine number using the input device 25, inputting data, inputting an instruction for acquiring wear data, or inputting a reset instruction by the detection signal reset means 24. This is a screen (command input screen) for

  As described above, according to the motor bearing monitoring system according to the first embodiment of the present invention, the information terminal 7 takes in the bearing wear data of one or more canned motor pumps 1 from the bearing wear monitoring device 3 and When the life determining means 22 determines that the wear state of the bearing is close to the bearing life limit point w ′ or exceeds the bearing life limit point w ′ based on the wear data, the display device 20 or the like is used. A warning or warning is output to the user to prompt for replacement. As a result, sudden maintenance becomes unnecessary, maintenance can be performed systematically, and the reliability of the bearing can be improved.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. In the figure, the same reference numerals as those in the first embodiment are given the same reference numerals, and the description thereof is omitted.

  FIG. 5 is a block diagram schematically showing the system configuration of a motor bearing wear monitoring system according to the second embodiment of the present invention. In the first embodiment, data communication between the bearing wear monitoring device 3 and the information terminal 7 is performed via the wired cable 6 that connects the bearing wear monitoring device 3 and the information terminal 7. In the embodiment, the processing is performed via the data communication device 26 that is smaller than the information terminal 7 and has excellent portability. In the figure, the bearing wear monitoring device 3 ′ includes a communication port 27 connected to the microchip 8. The communication port 27 is an optical transmitter / receiver (for example, an infrared transmitter / receiver) including a light emitting element 28 and a light receiving element 29, and wear data and machine number data stored in the memory 12 are converted from an electrical signal to an optical signal. And transmitted from the light emitting element 28.

  On the other hand, the data communication device 26 that receives data from the bearing wear monitoring device 3 ′ includes a communication port 32 including a light emitting element 30 and a light receiving element 31, as with the communication port 27. The optical signal transmitted from the light emitting element 28 of the bearing wear monitoring device 3 ′ is received by the light receiving element 31 of the communication port 32, converted into an electric signal, and a memory provided in the microchip 33 connected to the communication port 32. 34 is stored. In addition to the memory 34, the microchip 33 includes a CPU 35 for controlling the operation of the data communication device 26, and a transmission / reception unit 36 for communicating with the information terminal 7. The transmission / reception unit 36 is detachably connectable. Is connected to the information terminal 7 via a connection cable 37.

  In the motor bearing monitoring system according to the present embodiment, the bearing wear data of the plurality of canned motor pumps 1 arranged in the plant is transmitted from the respective bearing wear monitoring devices 3 'to the data communication device 26, The transmitted wear data is stored in the memory 34 for each canned motor pump 1. Thereafter, the data communication device 26 and the information terminal 7 are connected via the connection cable 27, and the wear data of each canned motor pump 1 stored in the memory 34 of the data communication device 26 is transmitted to the information terminal 7, It is registered in the management ledger 18 by the management ledger registration means 19.

  On the other hand, the reset signal output from the detection signal reset means 24 of the information terminal 7 and the machine number data of the canned motor pump 1 to be reset are transmitted to the data communication device 26 via the connection cable 37 and stored in the memory 34. . Thereafter, the data communication device 26 is moved to the canned motor pump 1 to be reset, and when the machine number data is collated with the bearing wear monitoring device 3 ′ of the canned motor pump 1 to be reset, the reset stored in the memory 34 is performed. The signal is converted from an electrical signal to an optical signal, transmitted from the light emitting element 30 to the light receiving element 29 of the bearing wear monitoring device 3 ′, and reset adjustment of the detection signal is performed by the bearing wear monitoring device 3 ′.

  As described above, according to the bearing wear monitoring system for a motor according to the second embodiment of the present invention, optical communication is possible via the bearing wear monitoring device 3 'and the communication ports 32 and 29, and the information terminal 7 is connected. Data communication between the bearing wear monitoring device 3 ′ and the information terminal 7 is performed by the data communication device 26 that can be detachably connected via the cable 37. Thereby, the bearing wear monitoring device 3 ′ of each canned motor pump 1 can be obtained by using the data communication device 26 that is smaller than the information terminal 7 and has excellent portability as well as the same operational effects as the first embodiment. Therefore, it is possible to improve workability when collecting wear data from a large number of bearing wear monitoring devices 3 '.

  As mentioned above, although embodiment of this invention was described concretely, this invention is not limited to this, In the range which does not deviate from the meaning, it can change suitably.

It is explanatory drawing which shows roughly the bearing wear monitoring system of the motor which concerns on 1st Embodiment of this invention. It is a block diagram which shows schematic structure of the microchip with which the bearing wear monitoring apparatus was equipped. It is a block diagram which shows roughly the system configuration | structure of a bearing wear monitoring system. It is a figure which shows the example of the display screen of the display apparatus connected to the information terminal. It is a block diagram which shows roughly the system configuration | structure of the bearing wear monitoring system of the motor which concerns on 2nd Embodiment of this invention. It is a partially broken side view showing a schematic structure of a general canned motor pump. It is principal part sectional drawing of the bearing wear monitoring apparatus along the VII-VII line in FIG. It is a top view which shows the display board of a bearing wear monitoring apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Canned motor pump 2 Canned motor 3 Bearing wear monitoring apparatus 6 Wired cable 7 Information terminal 9 Detection means 15 Transmission / reception part 18 Management ledger 19 Management ledger registration means 20 Display device 21 Display means 22 Bearing life judgment means 23 Bearing life warning means 24 Detection Signal reset means 26 Data communication device 27 Communication port 32 Communication port 37 Connection cable

Claims (6)

One or more motors having bearings for rotatably supporting the rotating shaft;
A bearing wear monitoring device that is disposed in the one or more motors and that monitors wear of the bearing and outputs wear data of the bearing;
An information terminal for taking in the wear data output from the bearing wear monitoring device and monitoring the wear state of the bearing of the one or more motors;
The information terminal
Wear data receiving means for receiving the wear data output from the bearing wear monitoring device;
A management ledger registration means for registering the wear data in the management ledger for each of the one or more motors;
Display means for displaying the wear state of the bearing based on the wear data;
Bearing life judging means for judging the life of the bearing based on the wear data;
Bearing life warning means for outputting a warning when the bearing life judging means judges that the bearing is at the end of its life ,
The display means includes
A management ledger display function for displaying data registered in the management ledger;
An individual characteristic display function for displaying a time-wear characteristic of the bearing for each of the one or more motors based on the wear data;
A multi-characteristic display function for displaying time-wear characteristics of the bearings of one or more motors registered in the management ledger based on the wear data;
A bearing life warning display function for displaying the presence or absence of a warning based on a warning signal output from the bearing life warning means;
Motor bearings wear monitoring system characterized in that it comprises. The motor bearing wear monitoring system according to claim 1, wherein the one or more motors are canned motors having bearings that rotatably support a rotating shaft connected to an impeller. The wear data includes wear data in the thrust direction of the bearing, wear data in the radial direction of the bearing, rotation direction data of the rotating shaft, and operation time data of the one or more motors. Or the motor bearing wear monitoring system according to 2; The information terminal, the bearing wear monitor motor bearing abrasion monitor system according to any one of claims 1 to 3 and a detection signal reset means for outputting a reset signal for resetting adjustment of the detection signal by the device . The data communication between the bearing wear monitoring device and the information terminal, the motor according to any one of claims 1 to 4 is carried out via a wireline cable connected to said bearing wear monitoring device and the information terminal Bearing wear monitoring system. Data communication between the bearing wear monitoring device and the information terminal can be optically transmitted to and received from the bearing wear monitoring device, and can be detachably connected to a connection cable connected to the information terminal. The motor bearing wear monitoring system according to any one of claims 1 to 4 , wherein the system is carried out via a motor.

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